1 /* Output Dwarf2 format symbol table information from GCC.
2 Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Gary Funck (gary@intrepid.com).
6 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
7 Extensively modified by Jason Merrill (jason@cygnus.com).
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free
13 Software Foundation; either version 3, or (at your option) any later
16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING3. If not see
23 <http://www.gnu.org/licenses/>. */
25 /* TODO: Emit .debug_line header even when there are no functions, since
26 the file numbers are used by .debug_info. Alternately, leave
27 out locations for types and decls.
28 Avoid talking about ctors and op= for PODs.
29 Factor out common prologue sequences into multiple CIEs. */
31 /* The first part of this file deals with the DWARF 2 frame unwind
32 information, which is also used by the GCC efficient exception handling
33 mechanism. The second part, controlled only by an #ifdef
34 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
37 /* DWARF2 Abbreviation Glossary:
39 CFA = Canonical Frame Address
40 a fixed address on the stack which identifies a call frame.
41 We define it to be the value of SP just before the call insn.
42 The CFA register and offset, which may change during the course
43 of the function, are used to calculate its value at runtime.
45 CFI = Call Frame Instruction
46 an instruction for the DWARF2 abstract machine
48 CIE = Common Information Entry
49 information describing information common to one or more FDEs
51 DIE = Debugging Information Entry
53 FDE = Frame Description Entry
54 information describing the stack call frame, in particular,
55 how to restore registers
57 DW_CFA_... = DWARF2 CFA call frame instruction
58 DW_TAG_... = DWARF2 DIE tag */
62 #include "coretypes.h"
68 #include "hard-reg-set.h"
70 #include "insn-config.h"
78 #include "dwarf2out.h"
79 #include "dwarf2asm.h"
84 #include "diagnostic.h"
85 #include "tree-pretty-print.h"
88 #include "common/common-target.h"
89 #include "langhooks.h"
94 #include "tree-pass.h"
95 #include "tree-flow.h"
96 #include "cfglayout.h"
99 static void dwarf2out_source_line (unsigned int, const char *, int, bool);
100 static rtx last_var_location_insn;
101 static rtx cached_next_real_insn;
103 #ifdef VMS_DEBUGGING_INFO
104 int vms_file_stats_name (const char *, long long *, long *, char *, int *);
106 /* Define this macro to be a nonzero value if the directory specifications
107 which are output in the debug info should end with a separator. */
108 #define DWARF2_DIR_SHOULD_END_WITH_SEPARATOR 1
109 /* Define this macro to evaluate to a nonzero value if GCC should refrain
110 from generating indirect strings in DWARF2 debug information, for instance
111 if your target is stuck with an old version of GDB that is unable to
112 process them properly or uses VMS Debug. */
113 #define DWARF2_INDIRECT_STRING_SUPPORT_MISSING_ON_TARGET 1
115 #define DWARF2_DIR_SHOULD_END_WITH_SEPARATOR 0
116 #define DWARF2_INDIRECT_STRING_SUPPORT_MISSING_ON_TARGET 0
119 /* ??? Poison these here until it can be done generically. They've been
120 totally replaced in this file; make sure it stays that way. */
121 #undef DWARF2_UNWIND_INFO
122 #undef DWARF2_FRAME_INFO
123 #if (GCC_VERSION >= 3000)
124 #pragma GCC poison DWARF2_UNWIND_INFO DWARF2_FRAME_INFO
127 /* The size of the target's pointer type. */
129 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
132 /* Array of RTXes referenced by the debugging information, which therefore
133 must be kept around forever. */
134 static GTY(()) VEC(rtx,gc) *used_rtx_array;
136 /* A pointer to the base of a list of incomplete types which might be
137 completed at some later time. incomplete_types_list needs to be a
138 VEC(tree,gc) because we want to tell the garbage collector about
140 static GTY(()) VEC(tree,gc) *incomplete_types;
142 /* A pointer to the base of a table of references to declaration
143 scopes. This table is a display which tracks the nesting
144 of declaration scopes at the current scope and containing
145 scopes. This table is used to find the proper place to
146 define type declaration DIE's. */
147 static GTY(()) VEC(tree,gc) *decl_scope_table;
149 /* Pointers to various DWARF2 sections. */
150 static GTY(()) section *debug_info_section;
151 static GTY(()) section *debug_abbrev_section;
152 static GTY(()) section *debug_aranges_section;
153 static GTY(()) section *debug_macinfo_section;
154 static GTY(()) section *debug_line_section;
155 static GTY(()) section *debug_loc_section;
156 static GTY(()) section *debug_pubnames_section;
157 static GTY(()) section *debug_pubtypes_section;
158 static GTY(()) section *debug_str_section;
159 static GTY(()) section *debug_ranges_section;
160 static GTY(()) section *debug_frame_section;
162 /* Maximum size (in bytes) of an artificially generated label. */
163 #define MAX_ARTIFICIAL_LABEL_BYTES 30
165 /* According to the (draft) DWARF 3 specification, the initial length
166 should either be 4 or 12 bytes. When it's 12 bytes, the first 4
167 bytes are 0xffffffff, followed by the length stored in the next 8
170 However, the SGI/MIPS ABI uses an initial length which is equal to
171 DWARF_OFFSET_SIZE. It is defined (elsewhere) accordingly. */
173 #ifndef DWARF_INITIAL_LENGTH_SIZE
174 #define DWARF_INITIAL_LENGTH_SIZE (DWARF_OFFSET_SIZE == 4 ? 4 : 12)
177 /* Round SIZE up to the nearest BOUNDARY. */
178 #define DWARF_ROUND(SIZE,BOUNDARY) \
179 ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY))
181 /* CIE identifier. */
182 #if HOST_BITS_PER_WIDE_INT >= 64
183 #define DWARF_CIE_ID \
184 (unsigned HOST_WIDE_INT) (DWARF_OFFSET_SIZE == 4 ? DW_CIE_ID : DW64_CIE_ID)
186 #define DWARF_CIE_ID DW_CIE_ID
189 DEF_VEC_P (dw_fde_ref);
190 DEF_VEC_ALLOC_P (dw_fde_ref, gc);
192 /* A vector for a table that contains frame description
193 information for each routine. */
194 static GTY(()) VEC(dw_fde_ref, gc) *fde_vec;
196 struct GTY(()) indirect_string_node {
198 unsigned int refcount;
199 enum dwarf_form form;
203 static GTY ((param_is (struct indirect_string_node))) htab_t debug_str_hash;
205 static GTY(()) int dw2_string_counter;
207 /* True if the compilation unit places functions in more than one section. */
208 static GTY(()) bool have_multiple_function_sections = false;
210 /* Whether the default text and cold text sections have been used at all. */
212 static GTY(()) bool text_section_used = false;
213 static GTY(()) bool cold_text_section_used = false;
215 /* The default cold text section. */
216 static GTY(()) section *cold_text_section;
218 /* Forward declarations for functions defined in this file. */
220 static char *stripattributes (const char *);
221 static void output_call_frame_info (int);
222 static void dwarf2out_note_section_used (void);
224 /* Personality decl of current unit. Used only when assembler does not support
226 static GTY(()) rtx current_unit_personality;
228 /* Data and reference forms for relocatable data. */
229 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
230 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
232 #ifndef DEBUG_FRAME_SECTION
233 #define DEBUG_FRAME_SECTION ".debug_frame"
236 #ifndef FUNC_BEGIN_LABEL
237 #define FUNC_BEGIN_LABEL "LFB"
240 #ifndef FUNC_END_LABEL
241 #define FUNC_END_LABEL "LFE"
244 #ifndef PROLOGUE_END_LABEL
245 #define PROLOGUE_END_LABEL "LPE"
248 #ifndef EPILOGUE_BEGIN_LABEL
249 #define EPILOGUE_BEGIN_LABEL "LEB"
252 #ifndef FRAME_BEGIN_LABEL
253 #define FRAME_BEGIN_LABEL "Lframe"
255 #define CIE_AFTER_SIZE_LABEL "LSCIE"
256 #define CIE_END_LABEL "LECIE"
257 #define FDE_LABEL "LSFDE"
258 #define FDE_AFTER_SIZE_LABEL "LASFDE"
259 #define FDE_END_LABEL "LEFDE"
260 #define LINE_NUMBER_BEGIN_LABEL "LSLT"
261 #define LINE_NUMBER_END_LABEL "LELT"
262 #define LN_PROLOG_AS_LABEL "LASLTP"
263 #define LN_PROLOG_END_LABEL "LELTP"
264 #define DIE_LABEL_PREFIX "DW"
266 /* Match the base name of a file to the base name of a compilation unit. */
269 matches_main_base (const char *path)
271 /* Cache the last query. */
272 static const char *last_path = NULL;
273 static int last_match = 0;
274 if (path != last_path)
277 int length = base_of_path (path, &base);
279 last_match = (length == main_input_baselength
280 && memcmp (base, main_input_basename, length) == 0);
285 #ifdef DEBUG_DEBUG_STRUCT
288 dump_struct_debug (tree type, enum debug_info_usage usage,
289 enum debug_struct_file criterion, int generic,
290 int matches, int result)
292 /* Find the type name. */
293 tree type_decl = TYPE_STUB_DECL (type);
295 const char *name = 0;
296 if (TREE_CODE (t) == TYPE_DECL)
299 name = IDENTIFIER_POINTER (t);
301 fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n",
303 DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr",
304 matches ? "bas" : "hdr",
305 generic ? "gen" : "ord",
306 usage == DINFO_USAGE_DFN ? ";" :
307 usage == DINFO_USAGE_DIR_USE ? "." : "*",
309 (void*) type_decl, name);
312 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
313 dump_struct_debug (type, usage, criterion, generic, matches, result)
317 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
323 should_emit_struct_debug (tree type, enum debug_info_usage usage)
325 enum debug_struct_file criterion;
327 bool generic = lang_hooks.types.generic_p (type);
330 criterion = debug_struct_generic[usage];
332 criterion = debug_struct_ordinary[usage];
334 if (criterion == DINFO_STRUCT_FILE_NONE)
335 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
336 if (criterion == DINFO_STRUCT_FILE_ANY)
337 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
339 type_decl = TYPE_STUB_DECL (TYPE_MAIN_VARIANT (type));
341 if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl))
342 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
344 if (matches_main_base (DECL_SOURCE_FILE (type_decl)))
345 return DUMP_GSTRUCT (type, usage, criterion, generic, true, true);
346 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
349 /* Return a pointer to a copy of the section string name S with all
350 attributes stripped off, and an asterisk prepended (for assemble_name). */
353 stripattributes (const char *s)
355 char *stripped = XNEWVEC (char, strlen (s) + 2);
360 while (*s && *s != ',')
367 /* Switch [BACK] to eh_frame_section. If we don't have an eh_frame_section,
368 switch to the data section instead, and write out a synthetic start label
369 for collect2 the first time around. */
372 switch_to_eh_frame_section (bool back)
376 #ifdef EH_FRAME_SECTION_NAME
377 if (eh_frame_section == 0)
381 if (EH_TABLES_CAN_BE_READ_ONLY)
387 fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1,
389 per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2,
391 lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0,
394 || ((fde_encoding & 0x70) != DW_EH_PE_absptr
395 && (fde_encoding & 0x70) != DW_EH_PE_aligned
396 && (per_encoding & 0x70) != DW_EH_PE_absptr
397 && (per_encoding & 0x70) != DW_EH_PE_aligned
398 && (lsda_encoding & 0x70) != DW_EH_PE_absptr
399 && (lsda_encoding & 0x70) != DW_EH_PE_aligned))
400 ? 0 : SECTION_WRITE);
403 flags = SECTION_WRITE;
404 eh_frame_section = get_section (EH_FRAME_SECTION_NAME, flags, NULL);
406 #endif /* EH_FRAME_SECTION_NAME */
408 if (eh_frame_section)
409 switch_to_section (eh_frame_section);
412 /* We have no special eh_frame section. Put the information in
413 the data section and emit special labels to guide collect2. */
414 switch_to_section (data_section);
418 label = get_file_function_name ("F");
419 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
420 targetm.asm_out.globalize_label (asm_out_file,
421 IDENTIFIER_POINTER (label));
422 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
427 /* Switch [BACK] to the eh or debug frame table section, depending on
431 switch_to_frame_table_section (int for_eh, bool back)
434 switch_to_eh_frame_section (back);
437 if (!debug_frame_section)
438 debug_frame_section = get_section (DEBUG_FRAME_SECTION,
439 SECTION_DEBUG, NULL);
440 switch_to_section (debug_frame_section);
444 /* Describe for the GTY machinery what parts of dw_cfi_oprnd1 are used. */
446 enum dw_cfi_oprnd_type
447 dw_cfi_oprnd1_desc (enum dwarf_call_frame_info cfi)
452 case DW_CFA_GNU_window_save:
453 case DW_CFA_remember_state:
454 case DW_CFA_restore_state:
455 return dw_cfi_oprnd_unused;
458 case DW_CFA_advance_loc1:
459 case DW_CFA_advance_loc2:
460 case DW_CFA_advance_loc4:
461 case DW_CFA_MIPS_advance_loc8:
462 return dw_cfi_oprnd_addr;
465 case DW_CFA_offset_extended:
467 case DW_CFA_offset_extended_sf:
468 case DW_CFA_def_cfa_sf:
470 case DW_CFA_restore_extended:
471 case DW_CFA_undefined:
472 case DW_CFA_same_value:
473 case DW_CFA_def_cfa_register:
474 case DW_CFA_register:
475 case DW_CFA_expression:
476 return dw_cfi_oprnd_reg_num;
478 case DW_CFA_def_cfa_offset:
479 case DW_CFA_GNU_args_size:
480 case DW_CFA_def_cfa_offset_sf:
481 return dw_cfi_oprnd_offset;
483 case DW_CFA_def_cfa_expression:
484 return dw_cfi_oprnd_loc;
491 /* Describe for the GTY machinery what parts of dw_cfi_oprnd2 are used. */
493 enum dw_cfi_oprnd_type
494 dw_cfi_oprnd2_desc (enum dwarf_call_frame_info cfi)
499 case DW_CFA_def_cfa_sf:
501 case DW_CFA_offset_extended_sf:
502 case DW_CFA_offset_extended:
503 return dw_cfi_oprnd_offset;
505 case DW_CFA_register:
506 return dw_cfi_oprnd_reg_num;
508 case DW_CFA_expression:
509 return dw_cfi_oprnd_loc;
512 return dw_cfi_oprnd_unused;
516 /* Output one FDE. */
519 output_fde (dw_fde_ref fde, bool for_eh, bool second,
520 char *section_start_label, int fde_encoding, char *augmentation,
521 bool any_lsda_needed, int lsda_encoding)
523 const char *begin, *end;
524 static unsigned int j;
527 targetm.asm_out.emit_unwind_label (asm_out_file, fde->decl, for_eh,
529 targetm.asm_out.internal_label (asm_out_file, FDE_LABEL,
531 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + j);
532 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + j);
533 if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh)
534 dw2_asm_output_data (4, 0xffffffff, "Initial length escape value"
535 " indicating 64-bit DWARF extension");
536 dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1,
538 ASM_OUTPUT_LABEL (asm_out_file, l1);
541 dw2_asm_output_delta (4, l1, section_start_label, "FDE CIE offset");
543 dw2_asm_output_offset (DWARF_OFFSET_SIZE, section_start_label,
544 debug_frame_section, "FDE CIE offset");
546 begin = second ? fde->dw_fde_second_begin : fde->dw_fde_begin;
547 end = second ? fde->dw_fde_second_end : fde->dw_fde_end;
551 rtx sym_ref = gen_rtx_SYMBOL_REF (Pmode, begin);
552 SYMBOL_REF_FLAGS (sym_ref) |= SYMBOL_FLAG_LOCAL;
553 dw2_asm_output_encoded_addr_rtx (fde_encoding, sym_ref, false,
554 "FDE initial location");
555 dw2_asm_output_delta (size_of_encoded_value (fde_encoding),
556 end, begin, "FDE address range");
560 dw2_asm_output_addr (DWARF2_ADDR_SIZE, begin, "FDE initial location");
561 dw2_asm_output_delta (DWARF2_ADDR_SIZE, end, begin, "FDE address range");
568 int size = size_of_encoded_value (lsda_encoding);
570 if (lsda_encoding == DW_EH_PE_aligned)
572 int offset = ( 4 /* Length */
574 + 2 * size_of_encoded_value (fde_encoding)
575 + 1 /* Augmentation size */ );
576 int pad = -offset & (PTR_SIZE - 1);
579 gcc_assert (size_of_uleb128 (size) == 1);
582 dw2_asm_output_data_uleb128 (size, "Augmentation size");
584 if (fde->uses_eh_lsda)
586 ASM_GENERATE_INTERNAL_LABEL (l1, second ? "LLSDAC" : "LLSDA",
587 fde->funcdef_number);
588 dw2_asm_output_encoded_addr_rtx (lsda_encoding,
589 gen_rtx_SYMBOL_REF (Pmode, l1),
591 "Language Specific Data Area");
595 if (lsda_encoding == DW_EH_PE_aligned)
596 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
597 dw2_asm_output_data (size_of_encoded_value (lsda_encoding), 0,
598 "Language Specific Data Area (none)");
602 dw2_asm_output_data_uleb128 (0, "Augmentation size");
605 /* Loop through the Call Frame Instructions associated with this FDE. */
606 fde->dw_fde_current_label = begin;
608 size_t from, until, i;
611 until = VEC_length (dw_cfi_ref, fde->dw_fde_cfi);
613 if (fde->dw_fde_second_begin == NULL)
616 until = fde->dw_fde_switch_cfi_index;
618 from = fde->dw_fde_switch_cfi_index;
620 for (i = from; i < until; i++)
621 output_cfi (VEC_index (dw_cfi_ref, fde->dw_fde_cfi, i), fde, for_eh);
624 /* If we are to emit a ref/link from function bodies to their frame tables,
625 do it now. This is typically performed to make sure that tables
626 associated with functions are dragged with them and not discarded in
627 garbage collecting links. We need to do this on a per function basis to
628 cope with -ffunction-sections. */
630 #ifdef ASM_OUTPUT_DWARF_TABLE_REF
631 /* Switch to the function section, emit the ref to the tables, and
632 switch *back* into the table section. */
633 switch_to_section (function_section (fde->decl));
634 ASM_OUTPUT_DWARF_TABLE_REF (section_start_label);
635 switch_to_frame_table_section (for_eh, true);
638 /* Pad the FDE out to an address sized boundary. */
639 ASM_OUTPUT_ALIGN (asm_out_file,
640 floor_log2 ((for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE)));
641 ASM_OUTPUT_LABEL (asm_out_file, l2);
646 /* Return true if frame description entry FDE is needed for EH. */
649 fde_needed_for_eh_p (dw_fde_ref fde)
651 if (flag_asynchronous_unwind_tables)
654 if (TARGET_USES_WEAK_UNWIND_INFO && DECL_WEAK (fde->decl))
657 if (fde->uses_eh_lsda)
660 /* If exceptions are enabled, we have collected nothrow info. */
661 if (flag_exceptions && (fde->all_throwers_are_sibcalls || fde->nothrow))
667 /* Output the call frame information used to record information
668 that relates to calculating the frame pointer, and records the
669 location of saved registers. */
672 output_call_frame_info (int for_eh)
677 char l1[20], l2[20], section_start_label[20];
678 bool any_lsda_needed = false;
679 char augmentation[6];
680 int augmentation_size;
681 int fde_encoding = DW_EH_PE_absptr;
682 int per_encoding = DW_EH_PE_absptr;
683 int lsda_encoding = DW_EH_PE_absptr;
685 rtx personality = NULL;
688 /* Don't emit a CIE if there won't be any FDEs. */
692 /* Nothing to do if the assembler's doing it all. */
693 if (dwarf2out_do_cfi_asm ())
696 /* If we don't have any functions we'll want to unwind out of, don't emit
697 any EH unwind information. If we make FDEs linkonce, we may have to
698 emit an empty label for an FDE that wouldn't otherwise be emitted. We
699 want to avoid having an FDE kept around when the function it refers to
700 is discarded. Example where this matters: a primary function template
701 in C++ requires EH information, an explicit specialization doesn't. */
704 bool any_eh_needed = false;
706 FOR_EACH_VEC_ELT (dw_fde_ref, fde_vec, i, fde)
708 if (fde->uses_eh_lsda)
709 any_eh_needed = any_lsda_needed = true;
710 else if (fde_needed_for_eh_p (fde))
711 any_eh_needed = true;
712 else if (TARGET_USES_WEAK_UNWIND_INFO)
713 targetm.asm_out.emit_unwind_label (asm_out_file, fde->decl, 1, 1);
720 /* We're going to be generating comments, so turn on app. */
724 /* Switch to the proper frame section, first time. */
725 switch_to_frame_table_section (for_eh, false);
727 ASM_GENERATE_INTERNAL_LABEL (section_start_label, FRAME_BEGIN_LABEL, for_eh);
728 ASM_OUTPUT_LABEL (asm_out_file, section_start_label);
730 /* Output the CIE. */
731 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
732 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
733 if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4 && !for_eh)
734 dw2_asm_output_data (4, 0xffffffff,
735 "Initial length escape value indicating 64-bit DWARF extension");
736 dw2_asm_output_delta (for_eh ? 4 : DWARF_OFFSET_SIZE, l2, l1,
737 "Length of Common Information Entry");
738 ASM_OUTPUT_LABEL (asm_out_file, l1);
740 /* Now that the CIE pointer is PC-relative for EH,
741 use 0 to identify the CIE. */
742 dw2_asm_output_data ((for_eh ? 4 : DWARF_OFFSET_SIZE),
743 (for_eh ? 0 : DWARF_CIE_ID),
744 "CIE Identifier Tag");
746 /* Use the CIE version 3 for DWARF3; allow DWARF2 to continue to
747 use CIE version 1, unless that would produce incorrect results
748 due to overflowing the return register column. */
749 return_reg = DWARF2_FRAME_REG_OUT (DWARF_FRAME_RETURN_COLUMN, for_eh);
751 if (return_reg >= 256 || dwarf_version > 2)
753 dw2_asm_output_data (1, dw_cie_version, "CIE Version");
756 augmentation_size = 0;
758 personality = current_unit_personality;
764 z Indicates that a uleb128 is present to size the
765 augmentation section.
766 L Indicates the encoding (and thus presence) of
767 an LSDA pointer in the FDE augmentation.
768 R Indicates a non-default pointer encoding for
770 P Indicates the presence of an encoding + language
771 personality routine in the CIE augmentation. */
773 fde_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/1, /*global=*/0);
774 per_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1);
775 lsda_encoding = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0);
777 p = augmentation + 1;
781 augmentation_size += 1 + size_of_encoded_value (per_encoding);
782 assemble_external_libcall (personality);
787 augmentation_size += 1;
789 if (fde_encoding != DW_EH_PE_absptr)
792 augmentation_size += 1;
794 if (p > augmentation + 1)
796 augmentation[0] = 'z';
800 /* Ug. Some platforms can't do unaligned dynamic relocations at all. */
801 if (personality && per_encoding == DW_EH_PE_aligned)
803 int offset = ( 4 /* Length */
805 + 1 /* CIE version */
806 + strlen (augmentation) + 1 /* Augmentation */
807 + size_of_uleb128 (1) /* Code alignment */
808 + size_of_sleb128 (DWARF_CIE_DATA_ALIGNMENT)
810 + 1 /* Augmentation size */
811 + 1 /* Personality encoding */ );
812 int pad = -offset & (PTR_SIZE - 1);
814 augmentation_size += pad;
816 /* Augmentations should be small, so there's scarce need to
817 iterate for a solution. Die if we exceed one uleb128 byte. */
818 gcc_assert (size_of_uleb128 (augmentation_size) == 1);
822 dw2_asm_output_nstring (augmentation, -1, "CIE Augmentation");
823 if (dw_cie_version >= 4)
825 dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "CIE Address Size");
826 dw2_asm_output_data (1, 0, "CIE Segment Size");
828 dw2_asm_output_data_uleb128 (1, "CIE Code Alignment Factor");
829 dw2_asm_output_data_sleb128 (DWARF_CIE_DATA_ALIGNMENT,
830 "CIE Data Alignment Factor");
832 if (dw_cie_version == 1)
833 dw2_asm_output_data (1, return_reg, "CIE RA Column");
835 dw2_asm_output_data_uleb128 (return_reg, "CIE RA Column");
839 dw2_asm_output_data_uleb128 (augmentation_size, "Augmentation size");
842 dw2_asm_output_data (1, per_encoding, "Personality (%s)",
843 eh_data_format_name (per_encoding));
844 dw2_asm_output_encoded_addr_rtx (per_encoding,
850 dw2_asm_output_data (1, lsda_encoding, "LSDA Encoding (%s)",
851 eh_data_format_name (lsda_encoding));
853 if (fde_encoding != DW_EH_PE_absptr)
854 dw2_asm_output_data (1, fde_encoding, "FDE Encoding (%s)",
855 eh_data_format_name (fde_encoding));
858 FOR_EACH_VEC_ELT (dw_cfi_ref, cie_cfi_vec, i, cfi)
859 output_cfi (cfi, NULL, for_eh);
861 /* Pad the CIE out to an address sized boundary. */
862 ASM_OUTPUT_ALIGN (asm_out_file,
863 floor_log2 (for_eh ? PTR_SIZE : DWARF2_ADDR_SIZE));
864 ASM_OUTPUT_LABEL (asm_out_file, l2);
866 /* Loop through all of the FDE's. */
867 FOR_EACH_VEC_ELT (dw_fde_ref, fde_vec, i, fde)
871 /* Don't emit EH unwind info for leaf functions that don't need it. */
872 if (for_eh && !fde_needed_for_eh_p (fde))
875 for (k = 0; k < (fde->dw_fde_second_begin ? 2 : 1); k++)
876 output_fde (fde, for_eh, k, section_start_label, fde_encoding,
877 augmentation, any_lsda_needed, lsda_encoding);
880 if (for_eh && targetm.terminate_dw2_eh_frame_info)
881 dw2_asm_output_data (4, 0, "End of Table");
882 #ifdef MIPS_DEBUGGING_INFO
883 /* Work around Irix 6 assembler bug whereby labels at the end of a section
884 get a value of 0. Putting .align 0 after the label fixes it. */
885 ASM_OUTPUT_ALIGN (asm_out_file, 0);
888 /* Turn off app to make assembly quicker. */
893 /* Emit .cfi_startproc and .cfi_personality/.cfi_lsda if needed. */
896 dwarf2out_do_cfi_startproc (bool second)
900 rtx personality = get_personality_function (current_function_decl);
902 fprintf (asm_out_file, "\t.cfi_startproc\n");
906 enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/2, /*global=*/1);
909 /* ??? The GAS support isn't entirely consistent. We have to
910 handle indirect support ourselves, but PC-relative is done
911 in the assembler. Further, the assembler can't handle any
912 of the weirder relocation types. */
913 if (enc & DW_EH_PE_indirect)
914 ref = dw2_force_const_mem (ref, true);
916 fprintf (asm_out_file, "\t.cfi_personality %#x,", enc);
917 output_addr_const (asm_out_file, ref);
918 fputc ('\n', asm_out_file);
921 if (crtl->uses_eh_lsda)
925 enc = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/0);
926 ASM_GENERATE_INTERNAL_LABEL (lab, second ? "LLSDAC" : "LLSDA",
927 current_function_funcdef_no);
928 ref = gen_rtx_SYMBOL_REF (Pmode, lab);
929 SYMBOL_REF_FLAGS (ref) = SYMBOL_FLAG_LOCAL;
931 if (enc & DW_EH_PE_indirect)
932 ref = dw2_force_const_mem (ref, true);
934 fprintf (asm_out_file, "\t.cfi_lsda %#x,", enc);
935 output_addr_const (asm_out_file, ref);
936 fputc ('\n', asm_out_file);
940 /* Allocate CURRENT_FDE. Immediately initialize all we can, noting that
941 this allocation may be done before pass_final. */
944 dwarf2out_alloc_current_fde (void)
948 fde = ggc_alloc_cleared_dw_fde_node ();
949 fde->decl = current_function_decl;
950 fde->funcdef_number = current_function_funcdef_no;
951 fde->fde_index = VEC_length (dw_fde_ref, fde_vec);
952 fde->all_throwers_are_sibcalls = crtl->all_throwers_are_sibcalls;
953 fde->uses_eh_lsda = crtl->uses_eh_lsda;
954 fde->nothrow = crtl->nothrow;
955 fde->drap_reg = INVALID_REGNUM;
956 fde->vdrap_reg = INVALID_REGNUM;
958 /* Record the FDE associated with this function. */
960 VEC_safe_push (dw_fde_ref, gc, fde_vec, fde);
965 /* Output a marker (i.e. a label) for the beginning of a function, before
969 dwarf2out_begin_prologue (unsigned int line ATTRIBUTE_UNUSED,
970 const char *file ATTRIBUTE_UNUSED)
972 char label[MAX_ARTIFICIAL_LABEL_BYTES];
978 current_function_func_begin_label = NULL;
980 do_frame = dwarf2out_do_frame ();
982 /* ??? current_function_func_begin_label is also used by except.c for
983 call-site information. We must emit this label if it might be used. */
986 || targetm_common.except_unwind_info (&global_options) != UI_TARGET))
989 fnsec = function_section (current_function_decl);
990 switch_to_section (fnsec);
991 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
992 current_function_funcdef_no);
993 ASM_OUTPUT_DEBUG_LABEL (asm_out_file, FUNC_BEGIN_LABEL,
994 current_function_funcdef_no);
995 dup_label = xstrdup (label);
996 current_function_func_begin_label = dup_label;
998 /* We can elide the fde allocation if we're not emitting debug info. */
1002 /* Cater to the various TARGET_ASM_OUTPUT_MI_THUNK implementations that
1003 emit insns as rtx but bypass the bulk of rest_of_compilation, which
1004 would include pass_dwarf2_frame. If we've not created the FDE yet,
1008 fde = dwarf2out_alloc_current_fde ();
1010 /* Initialize the bits of CURRENT_FDE that were not available earlier. */
1011 fde->dw_fde_begin = dup_label;
1012 fde->dw_fde_current_label = dup_label;
1013 fde->in_std_section = (fnsec == text_section
1014 || (cold_text_section && fnsec == cold_text_section));
1016 /* We only want to output line number information for the genuine dwarf2
1017 prologue case, not the eh frame case. */
1018 #ifdef DWARF2_DEBUGGING_INFO
1020 dwarf2out_source_line (line, file, 0, true);
1023 if (dwarf2out_do_cfi_asm ())
1024 dwarf2out_do_cfi_startproc (false);
1027 rtx personality = get_personality_function (current_function_decl);
1028 if (!current_unit_personality)
1029 current_unit_personality = personality;
1031 /* We cannot keep a current personality per function as without CFI
1032 asm, at the point where we emit the CFI data, there is no current
1033 function anymore. */
1034 if (personality && current_unit_personality != personality)
1035 sorry ("multiple EH personalities are supported only with assemblers "
1036 "supporting .cfi_personality directive");
1040 /* Output a marker (i.e. a label) for the end of the generated code
1041 for a function prologue. This gets called *after* the prologue code has
1045 dwarf2out_vms_end_prologue (unsigned int line ATTRIBUTE_UNUSED,
1046 const char *file ATTRIBUTE_UNUSED)
1048 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1050 /* Output a label to mark the endpoint of the code generated for this
1052 ASM_GENERATE_INTERNAL_LABEL (label, PROLOGUE_END_LABEL,
1053 current_function_funcdef_no);
1054 ASM_OUTPUT_DEBUG_LABEL (asm_out_file, PROLOGUE_END_LABEL,
1055 current_function_funcdef_no);
1056 cfun->fde->dw_fde_vms_end_prologue = xstrdup (label);
1059 /* Output a marker (i.e. a label) for the beginning of the generated code
1060 for a function epilogue. This gets called *before* the prologue code has
1064 dwarf2out_vms_begin_epilogue (unsigned int line ATTRIBUTE_UNUSED,
1065 const char *file ATTRIBUTE_UNUSED)
1067 dw_fde_ref fde = cfun->fde;
1068 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1070 if (fde->dw_fde_vms_begin_epilogue)
1073 /* Output a label to mark the endpoint of the code generated for this
1075 ASM_GENERATE_INTERNAL_LABEL (label, EPILOGUE_BEGIN_LABEL,
1076 current_function_funcdef_no);
1077 ASM_OUTPUT_DEBUG_LABEL (asm_out_file, EPILOGUE_BEGIN_LABEL,
1078 current_function_funcdef_no);
1079 fde->dw_fde_vms_begin_epilogue = xstrdup (label);
1082 /* Output a marker (i.e. a label) for the absolute end of the generated code
1083 for a function definition. This gets called *after* the epilogue code has
1087 dwarf2out_end_epilogue (unsigned int line ATTRIBUTE_UNUSED,
1088 const char *file ATTRIBUTE_UNUSED)
1091 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1093 last_var_location_insn = NULL_RTX;
1094 cached_next_real_insn = NULL_RTX;
1096 if (dwarf2out_do_cfi_asm ())
1097 fprintf (asm_out_file, "\t.cfi_endproc\n");
1099 /* Output a label to mark the endpoint of the code generated for this
1101 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL,
1102 current_function_funcdef_no);
1103 ASM_OUTPUT_LABEL (asm_out_file, label);
1105 gcc_assert (fde != NULL);
1106 if (fde->dw_fde_second_begin == NULL)
1107 fde->dw_fde_end = xstrdup (label);
1111 dwarf2out_frame_finish (void)
1113 /* Output call frame information. */
1114 if (targetm.debug_unwind_info () == UI_DWARF2)
1115 output_call_frame_info (0);
1117 /* Output another copy for the unwinder. */
1118 if ((flag_unwind_tables || flag_exceptions)
1119 && targetm_common.except_unwind_info (&global_options) == UI_DWARF2)
1120 output_call_frame_info (1);
1123 /* Note that the current function section is being used for code. */
1126 dwarf2out_note_section_used (void)
1128 section *sec = current_function_section ();
1129 if (sec == text_section)
1130 text_section_used = true;
1131 else if (sec == cold_text_section)
1132 cold_text_section_used = true;
1135 static void var_location_switch_text_section (void);
1136 static void set_cur_line_info_table (section *);
1139 dwarf2out_switch_text_section (void)
1142 dw_fde_ref fde = cfun->fde;
1144 gcc_assert (cfun && fde && fde->dw_fde_second_begin == NULL);
1146 if (!in_cold_section_p)
1148 fde->dw_fde_end = crtl->subsections.cold_section_end_label;
1149 fde->dw_fde_second_begin = crtl->subsections.hot_section_label;
1150 fde->dw_fde_second_end = crtl->subsections.hot_section_end_label;
1154 fde->dw_fde_end = crtl->subsections.hot_section_end_label;
1155 fde->dw_fde_second_begin = crtl->subsections.cold_section_label;
1156 fde->dw_fde_second_end = crtl->subsections.cold_section_end_label;
1158 have_multiple_function_sections = true;
1160 /* There is no need to mark used sections when not debugging. */
1161 if (cold_text_section != NULL)
1162 dwarf2out_note_section_used ();
1164 if (dwarf2out_do_cfi_asm ())
1165 fprintf (asm_out_file, "\t.cfi_endproc\n");
1167 /* Now do the real section switch. */
1168 sect = current_function_section ();
1169 switch_to_section (sect);
1171 fde->second_in_std_section
1172 = (sect == text_section
1173 || (cold_text_section && sect == cold_text_section));
1175 if (dwarf2out_do_cfi_asm ())
1176 dwarf2out_do_cfi_startproc (true);
1178 var_location_switch_text_section ();
1180 set_cur_line_info_table (sect);
1183 /* And now, the subset of the debugging information support code necessary
1184 for emitting location expressions. */
1186 /* Data about a single source file. */
1187 struct GTY(()) dwarf_file_data {
1188 const char * filename;
1192 typedef struct GTY(()) deferred_locations_struct
1196 } deferred_locations;
1198 DEF_VEC_O(deferred_locations);
1199 DEF_VEC_ALLOC_O(deferred_locations,gc);
1201 static GTY(()) VEC(deferred_locations, gc) *deferred_locations_list;
1203 DEF_VEC_P(dw_die_ref);
1204 DEF_VEC_ALLOC_P(dw_die_ref,heap);
1206 /* Location lists are ranges + location descriptions for that range,
1207 so you can track variables that are in different places over
1208 their entire life. */
1209 typedef struct GTY(()) dw_loc_list_struct {
1210 dw_loc_list_ref dw_loc_next;
1211 const char *begin; /* Label for begin address of range */
1212 const char *end; /* Label for end address of range */
1213 char *ll_symbol; /* Label for beginning of location list.
1214 Only on head of list */
1215 const char *section; /* Section this loclist is relative to */
1216 dw_loc_descr_ref expr;
1218 /* True if all addresses in this and subsequent lists are known to be
1221 /* True if this list has been replaced by dw_loc_next. */
1224 /* True if the range should be emitted even if begin and end
1229 static dw_loc_descr_ref int_loc_descriptor (HOST_WIDE_INT);
1231 /* Convert a DWARF stack opcode into its string name. */
1234 dwarf_stack_op_name (unsigned int op)
1239 return "DW_OP_addr";
1241 return "DW_OP_deref";
1243 return "DW_OP_const1u";
1245 return "DW_OP_const1s";
1247 return "DW_OP_const2u";
1249 return "DW_OP_const2s";
1251 return "DW_OP_const4u";
1253 return "DW_OP_const4s";
1255 return "DW_OP_const8u";
1257 return "DW_OP_const8s";
1259 return "DW_OP_constu";
1261 return "DW_OP_consts";
1265 return "DW_OP_drop";
1267 return "DW_OP_over";
1269 return "DW_OP_pick";
1271 return "DW_OP_swap";
1275 return "DW_OP_xderef";
1283 return "DW_OP_minus";
1295 return "DW_OP_plus";
1296 case DW_OP_plus_uconst:
1297 return "DW_OP_plus_uconst";
1303 return "DW_OP_shra";
1321 return "DW_OP_skip";
1323 return "DW_OP_lit0";
1325 return "DW_OP_lit1";
1327 return "DW_OP_lit2";
1329 return "DW_OP_lit3";
1331 return "DW_OP_lit4";
1333 return "DW_OP_lit5";
1335 return "DW_OP_lit6";
1337 return "DW_OP_lit7";
1339 return "DW_OP_lit8";
1341 return "DW_OP_lit9";
1343 return "DW_OP_lit10";
1345 return "DW_OP_lit11";
1347 return "DW_OP_lit12";
1349 return "DW_OP_lit13";
1351 return "DW_OP_lit14";
1353 return "DW_OP_lit15";
1355 return "DW_OP_lit16";
1357 return "DW_OP_lit17";
1359 return "DW_OP_lit18";
1361 return "DW_OP_lit19";
1363 return "DW_OP_lit20";
1365 return "DW_OP_lit21";
1367 return "DW_OP_lit22";
1369 return "DW_OP_lit23";
1371 return "DW_OP_lit24";
1373 return "DW_OP_lit25";
1375 return "DW_OP_lit26";
1377 return "DW_OP_lit27";
1379 return "DW_OP_lit28";
1381 return "DW_OP_lit29";
1383 return "DW_OP_lit30";
1385 return "DW_OP_lit31";
1387 return "DW_OP_reg0";
1389 return "DW_OP_reg1";
1391 return "DW_OP_reg2";
1393 return "DW_OP_reg3";
1395 return "DW_OP_reg4";
1397 return "DW_OP_reg5";
1399 return "DW_OP_reg6";
1401 return "DW_OP_reg7";
1403 return "DW_OP_reg8";
1405 return "DW_OP_reg9";
1407 return "DW_OP_reg10";
1409 return "DW_OP_reg11";
1411 return "DW_OP_reg12";
1413 return "DW_OP_reg13";
1415 return "DW_OP_reg14";
1417 return "DW_OP_reg15";
1419 return "DW_OP_reg16";
1421 return "DW_OP_reg17";
1423 return "DW_OP_reg18";
1425 return "DW_OP_reg19";
1427 return "DW_OP_reg20";
1429 return "DW_OP_reg21";
1431 return "DW_OP_reg22";
1433 return "DW_OP_reg23";
1435 return "DW_OP_reg24";
1437 return "DW_OP_reg25";
1439 return "DW_OP_reg26";
1441 return "DW_OP_reg27";
1443 return "DW_OP_reg28";
1445 return "DW_OP_reg29";
1447 return "DW_OP_reg30";
1449 return "DW_OP_reg31";
1451 return "DW_OP_breg0";
1453 return "DW_OP_breg1";
1455 return "DW_OP_breg2";
1457 return "DW_OP_breg3";
1459 return "DW_OP_breg4";
1461 return "DW_OP_breg5";
1463 return "DW_OP_breg6";
1465 return "DW_OP_breg7";
1467 return "DW_OP_breg8";
1469 return "DW_OP_breg9";
1471 return "DW_OP_breg10";
1473 return "DW_OP_breg11";
1475 return "DW_OP_breg12";
1477 return "DW_OP_breg13";
1479 return "DW_OP_breg14";
1481 return "DW_OP_breg15";
1483 return "DW_OP_breg16";
1485 return "DW_OP_breg17";
1487 return "DW_OP_breg18";
1489 return "DW_OP_breg19";
1491 return "DW_OP_breg20";
1493 return "DW_OP_breg21";
1495 return "DW_OP_breg22";
1497 return "DW_OP_breg23";
1499 return "DW_OP_breg24";
1501 return "DW_OP_breg25";
1503 return "DW_OP_breg26";
1505 return "DW_OP_breg27";
1507 return "DW_OP_breg28";
1509 return "DW_OP_breg29";
1511 return "DW_OP_breg30";
1513 return "DW_OP_breg31";
1515 return "DW_OP_regx";
1517 return "DW_OP_fbreg";
1519 return "DW_OP_bregx";
1521 return "DW_OP_piece";
1522 case DW_OP_deref_size:
1523 return "DW_OP_deref_size";
1524 case DW_OP_xderef_size:
1525 return "DW_OP_xderef_size";
1529 case DW_OP_push_object_address:
1530 return "DW_OP_push_object_address";
1532 return "DW_OP_call2";
1534 return "DW_OP_call4";
1535 case DW_OP_call_ref:
1536 return "DW_OP_call_ref";
1537 case DW_OP_implicit_value:
1538 return "DW_OP_implicit_value";
1539 case DW_OP_stack_value:
1540 return "DW_OP_stack_value";
1541 case DW_OP_form_tls_address:
1542 return "DW_OP_form_tls_address";
1543 case DW_OP_call_frame_cfa:
1544 return "DW_OP_call_frame_cfa";
1545 case DW_OP_bit_piece:
1546 return "DW_OP_bit_piece";
1548 case DW_OP_GNU_push_tls_address:
1549 return "DW_OP_GNU_push_tls_address";
1550 case DW_OP_GNU_uninit:
1551 return "DW_OP_GNU_uninit";
1552 case DW_OP_GNU_encoded_addr:
1553 return "DW_OP_GNU_encoded_addr";
1554 case DW_OP_GNU_implicit_pointer:
1555 return "DW_OP_GNU_implicit_pointer";
1556 case DW_OP_GNU_entry_value:
1557 return "DW_OP_GNU_entry_value";
1558 case DW_OP_GNU_const_type:
1559 return "DW_OP_GNU_const_type";
1560 case DW_OP_GNU_regval_type:
1561 return "DW_OP_GNU_regval_type";
1562 case DW_OP_GNU_deref_type:
1563 return "DW_OP_GNU_deref_type";
1564 case DW_OP_GNU_convert:
1565 return "DW_OP_GNU_convert";
1566 case DW_OP_GNU_reinterpret:
1567 return "DW_OP_GNU_reinterpret";
1568 case DW_OP_GNU_parameter_ref:
1569 return "DW_OP_GNU_parameter_ref";
1572 return "OP_<unknown>";
1576 /* Return a pointer to a newly allocated location description. Location
1577 descriptions are simple expression terms that can be strung
1578 together to form more complicated location (address) descriptions. */
1580 static inline dw_loc_descr_ref
1581 new_loc_descr (enum dwarf_location_atom op, unsigned HOST_WIDE_INT oprnd1,
1582 unsigned HOST_WIDE_INT oprnd2)
1584 dw_loc_descr_ref descr = ggc_alloc_cleared_dw_loc_descr_node ();
1586 descr->dw_loc_opc = op;
1587 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
1588 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
1589 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
1590 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
1595 /* Return a pointer to a newly allocated location description for
1598 static inline dw_loc_descr_ref
1599 new_reg_loc_descr (unsigned int reg, unsigned HOST_WIDE_INT offset)
1602 return new_loc_descr ((enum dwarf_location_atom) (DW_OP_breg0 + reg),
1605 return new_loc_descr (DW_OP_bregx, reg, offset);
1608 /* Add a location description term to a location description expression. */
1611 add_loc_descr (dw_loc_descr_ref *list_head, dw_loc_descr_ref descr)
1613 dw_loc_descr_ref *d;
1615 /* Find the end of the chain. */
1616 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
1622 /* Compare two location operands for exact equality. */
1625 dw_val_equal_p (dw_val_node *a, dw_val_node *b)
1627 if (a->val_class != b->val_class)
1629 switch (a->val_class)
1631 case dw_val_class_none:
1633 case dw_val_class_addr:
1634 return rtx_equal_p (a->v.val_addr, b->v.val_addr);
1636 case dw_val_class_offset:
1637 case dw_val_class_unsigned_const:
1638 case dw_val_class_const:
1639 case dw_val_class_range_list:
1640 case dw_val_class_lineptr:
1641 case dw_val_class_macptr:
1642 /* These are all HOST_WIDE_INT, signed or unsigned. */
1643 return a->v.val_unsigned == b->v.val_unsigned;
1645 case dw_val_class_loc:
1646 return a->v.val_loc == b->v.val_loc;
1647 case dw_val_class_loc_list:
1648 return a->v.val_loc_list == b->v.val_loc_list;
1649 case dw_val_class_die_ref:
1650 return a->v.val_die_ref.die == b->v.val_die_ref.die;
1651 case dw_val_class_fde_ref:
1652 return a->v.val_fde_index == b->v.val_fde_index;
1653 case dw_val_class_lbl_id:
1654 return strcmp (a->v.val_lbl_id, b->v.val_lbl_id) == 0;
1655 case dw_val_class_str:
1656 return a->v.val_str == b->v.val_str;
1657 case dw_val_class_flag:
1658 return a->v.val_flag == b->v.val_flag;
1659 case dw_val_class_file:
1660 return a->v.val_file == b->v.val_file;
1661 case dw_val_class_decl_ref:
1662 return a->v.val_decl_ref == b->v.val_decl_ref;
1664 case dw_val_class_const_double:
1665 return (a->v.val_double.high == b->v.val_double.high
1666 && a->v.val_double.low == b->v.val_double.low);
1668 case dw_val_class_vec:
1670 size_t a_len = a->v.val_vec.elt_size * a->v.val_vec.length;
1671 size_t b_len = b->v.val_vec.elt_size * b->v.val_vec.length;
1673 return (a_len == b_len
1674 && !memcmp (a->v.val_vec.array, b->v.val_vec.array, a_len));
1677 case dw_val_class_data8:
1678 return memcmp (a->v.val_data8, b->v.val_data8, 8) == 0;
1680 case dw_val_class_vms_delta:
1681 return (!strcmp (a->v.val_vms_delta.lbl1, b->v.val_vms_delta.lbl1)
1682 && !strcmp (a->v.val_vms_delta.lbl1, b->v.val_vms_delta.lbl1));
1687 /* Compare two location atoms for exact equality. */
1690 loc_descr_equal_p_1 (dw_loc_descr_ref a, dw_loc_descr_ref b)
1692 if (a->dw_loc_opc != b->dw_loc_opc)
1695 /* ??? This is only ever set for DW_OP_constNu, for N equal to the
1696 address size, but since we always allocate cleared storage it
1697 should be zero for other types of locations. */
1698 if (a->dtprel != b->dtprel)
1701 return (dw_val_equal_p (&a->dw_loc_oprnd1, &b->dw_loc_oprnd1)
1702 && dw_val_equal_p (&a->dw_loc_oprnd2, &b->dw_loc_oprnd2));
1705 /* Compare two complete location expressions for exact equality. */
1708 loc_descr_equal_p (dw_loc_descr_ref a, dw_loc_descr_ref b)
1714 if (a == NULL || b == NULL)
1716 if (!loc_descr_equal_p_1 (a, b))
1725 /* Add a constant OFFSET to a location expression. */
1728 loc_descr_plus_const (dw_loc_descr_ref *list_head, HOST_WIDE_INT offset)
1730 dw_loc_descr_ref loc;
1733 gcc_assert (*list_head != NULL);
1738 /* Find the end of the chain. */
1739 for (loc = *list_head; loc->dw_loc_next != NULL; loc = loc->dw_loc_next)
1743 if (loc->dw_loc_opc == DW_OP_fbreg
1744 || (loc->dw_loc_opc >= DW_OP_breg0 && loc->dw_loc_opc <= DW_OP_breg31))
1745 p = &loc->dw_loc_oprnd1.v.val_int;
1746 else if (loc->dw_loc_opc == DW_OP_bregx)
1747 p = &loc->dw_loc_oprnd2.v.val_int;
1749 /* If the last operation is fbreg, breg{0..31,x}, optimize by adjusting its
1750 offset. Don't optimize if an signed integer overflow would happen. */
1752 && ((offset > 0 && *p <= INTTYPE_MAXIMUM (HOST_WIDE_INT) - offset)
1753 || (offset < 0 && *p >= INTTYPE_MINIMUM (HOST_WIDE_INT) - offset)))
1756 else if (offset > 0)
1757 loc->dw_loc_next = new_loc_descr (DW_OP_plus_uconst, offset, 0);
1761 loc->dw_loc_next = int_loc_descriptor (-offset);
1762 add_loc_descr (&loc->dw_loc_next, new_loc_descr (DW_OP_minus, 0, 0));
1766 /* Add a constant OFFSET to a location list. */
1769 loc_list_plus_const (dw_loc_list_ref list_head, HOST_WIDE_INT offset)
1772 for (d = list_head; d != NULL; d = d->dw_loc_next)
1773 loc_descr_plus_const (&d->expr, offset);
1776 #define DWARF_REF_SIZE \
1777 (dwarf_version == 2 ? DWARF2_ADDR_SIZE : DWARF_OFFSET_SIZE)
1779 static unsigned long int get_base_type_offset (dw_die_ref);
1781 /* Return the size of a location descriptor. */
1783 static unsigned long
1784 size_of_loc_descr (dw_loc_descr_ref loc)
1786 unsigned long size = 1;
1788 switch (loc->dw_loc_opc)
1791 size += DWARF2_ADDR_SIZE;
1810 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1813 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
1818 case DW_OP_plus_uconst:
1819 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1857 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
1860 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1863 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
1866 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1867 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
1870 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1872 case DW_OP_bit_piece:
1873 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1874 size += size_of_uleb128 (loc->dw_loc_oprnd2.v.val_unsigned);
1876 case DW_OP_deref_size:
1877 case DW_OP_xderef_size:
1886 case DW_OP_call_ref:
1887 size += DWARF_REF_SIZE;
1889 case DW_OP_implicit_value:
1890 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned)
1891 + loc->dw_loc_oprnd1.v.val_unsigned;
1893 case DW_OP_GNU_implicit_pointer:
1894 size += DWARF_REF_SIZE + size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
1896 case DW_OP_GNU_entry_value:
1898 unsigned long op_size = size_of_locs (loc->dw_loc_oprnd1.v.val_loc);
1899 size += size_of_uleb128 (op_size) + op_size;
1902 case DW_OP_GNU_const_type:
1905 = get_base_type_offset (loc->dw_loc_oprnd1.v.val_die_ref.die);
1906 size += size_of_uleb128 (o) + 1;
1907 switch (loc->dw_loc_oprnd2.val_class)
1909 case dw_val_class_vec:
1910 size += loc->dw_loc_oprnd2.v.val_vec.length
1911 * loc->dw_loc_oprnd2.v.val_vec.elt_size;
1913 case dw_val_class_const:
1914 size += HOST_BITS_PER_WIDE_INT / BITS_PER_UNIT;
1916 case dw_val_class_const_double:
1917 size += 2 * HOST_BITS_PER_WIDE_INT / BITS_PER_UNIT;
1924 case DW_OP_GNU_regval_type:
1927 = get_base_type_offset (loc->dw_loc_oprnd2.v.val_die_ref.die);
1928 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned)
1929 + size_of_uleb128 (o);
1932 case DW_OP_GNU_deref_type:
1935 = get_base_type_offset (loc->dw_loc_oprnd2.v.val_die_ref.die);
1936 size += 1 + size_of_uleb128 (o);
1939 case DW_OP_GNU_convert:
1940 case DW_OP_GNU_reinterpret:
1941 if (loc->dw_loc_oprnd1.val_class == dw_val_class_unsigned_const)
1942 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
1946 = get_base_type_offset (loc->dw_loc_oprnd1.v.val_die_ref.die);
1947 size += size_of_uleb128 (o);
1950 case DW_OP_GNU_parameter_ref:
1960 /* Return the size of a series of location descriptors. */
1963 size_of_locs (dw_loc_descr_ref loc)
1968 /* If there are no skip or bra opcodes, don't fill in the dw_loc_addr
1969 field, to avoid writing to a PCH file. */
1970 for (size = 0, l = loc; l != NULL; l = l->dw_loc_next)
1972 if (l->dw_loc_opc == DW_OP_skip || l->dw_loc_opc == DW_OP_bra)
1974 size += size_of_loc_descr (l);
1979 for (size = 0, l = loc; l != NULL; l = l->dw_loc_next)
1981 l->dw_loc_addr = size;
1982 size += size_of_loc_descr (l);
1988 static HOST_WIDE_INT extract_int (const unsigned char *, unsigned);
1989 static void get_ref_die_offset_label (char *, dw_die_ref);
1990 static unsigned long int get_ref_die_offset (dw_die_ref);
1992 /* Output location description stack opcode's operands (if any).
1993 The for_eh_or_skip parameter controls whether register numbers are
1994 converted using DWARF2_FRAME_REG_OUT, which is needed in the case that
1995 hard reg numbers have been processed via DWARF_FRAME_REGNUM (i.e. for unwind
1996 info). This should be suppressed for the cases that have not been converted
1997 (i.e. symbolic debug info), by setting the parameter < 0. See PR47324. */
2000 output_loc_operands (dw_loc_descr_ref loc, int for_eh_or_skip)
2002 dw_val_ref val1 = &loc->dw_loc_oprnd1;
2003 dw_val_ref val2 = &loc->dw_loc_oprnd2;
2005 switch (loc->dw_loc_opc)
2007 #ifdef DWARF2_DEBUGGING_INFO
2010 dw2_asm_output_data (2, val1->v.val_int, NULL);
2015 gcc_assert (targetm.asm_out.output_dwarf_dtprel);
2016 targetm.asm_out.output_dwarf_dtprel (asm_out_file, 4,
2018 fputc ('\n', asm_out_file);
2023 dw2_asm_output_data (4, val1->v.val_int, NULL);
2028 gcc_assert (targetm.asm_out.output_dwarf_dtprel);
2029 targetm.asm_out.output_dwarf_dtprel (asm_out_file, 8,
2031 fputc ('\n', asm_out_file);
2036 gcc_assert (HOST_BITS_PER_WIDE_INT >= 64);
2037 dw2_asm_output_data (8, val1->v.val_int, NULL);
2044 gcc_assert (val1->val_class == dw_val_class_loc);
2045 offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3);
2047 dw2_asm_output_data (2, offset, NULL);
2050 case DW_OP_implicit_value:
2051 dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL);
2052 switch (val2->val_class)
2054 case dw_val_class_const:
2055 dw2_asm_output_data (val1->v.val_unsigned, val2->v.val_int, NULL);
2057 case dw_val_class_vec:
2059 unsigned int elt_size = val2->v.val_vec.elt_size;
2060 unsigned int len = val2->v.val_vec.length;
2064 if (elt_size > sizeof (HOST_WIDE_INT))
2069 for (i = 0, p = val2->v.val_vec.array;
2072 dw2_asm_output_data (elt_size, extract_int (p, elt_size),
2073 "fp or vector constant word %u", i);
2076 case dw_val_class_const_double:
2078 unsigned HOST_WIDE_INT first, second;
2080 if (WORDS_BIG_ENDIAN)
2082 first = val2->v.val_double.high;
2083 second = val2->v.val_double.low;
2087 first = val2->v.val_double.low;
2088 second = val2->v.val_double.high;
2090 dw2_asm_output_data (HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR,
2092 dw2_asm_output_data (HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR,
2096 case dw_val_class_addr:
2097 gcc_assert (val1->v.val_unsigned == DWARF2_ADDR_SIZE);
2098 dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, val2->v.val_addr, NULL);
2113 case DW_OP_implicit_value:
2114 /* We currently don't make any attempt to make sure these are
2115 aligned properly like we do for the main unwind info, so
2116 don't support emitting things larger than a byte if we're
2117 only doing unwinding. */
2122 dw2_asm_output_data (1, val1->v.val_int, NULL);
2125 dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL);
2128 dw2_asm_output_data_sleb128 (val1->v.val_int, NULL);
2131 dw2_asm_output_data (1, val1->v.val_int, NULL);
2133 case DW_OP_plus_uconst:
2134 dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL);
2168 dw2_asm_output_data_sleb128 (val1->v.val_int, NULL);
2172 unsigned r = val1->v.val_unsigned;
2173 if (for_eh_or_skip >= 0)
2174 r = DWARF2_FRAME_REG_OUT (r, for_eh_or_skip);
2175 gcc_assert (size_of_uleb128 (r)
2176 == size_of_uleb128 (val1->v.val_unsigned));
2177 dw2_asm_output_data_uleb128 (r, NULL);
2181 dw2_asm_output_data_sleb128 (val1->v.val_int, NULL);
2185 unsigned r = val1->v.val_unsigned;
2186 if (for_eh_or_skip >= 0)
2187 r = DWARF2_FRAME_REG_OUT (r, for_eh_or_skip);
2188 gcc_assert (size_of_uleb128 (r)
2189 == size_of_uleb128 (val1->v.val_unsigned));
2190 dw2_asm_output_data_uleb128 (r, NULL);
2191 dw2_asm_output_data_sleb128 (val2->v.val_int, NULL);
2195 dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL);
2197 case DW_OP_bit_piece:
2198 dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL);
2199 dw2_asm_output_data_uleb128 (val2->v.val_unsigned, NULL);
2201 case DW_OP_deref_size:
2202 case DW_OP_xderef_size:
2203 dw2_asm_output_data (1, val1->v.val_int, NULL);
2209 if (targetm.asm_out.output_dwarf_dtprel)
2211 targetm.asm_out.output_dwarf_dtprel (asm_out_file,
2214 fputc ('\n', asm_out_file);
2221 #ifdef DWARF2_DEBUGGING_INFO
2222 dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, val1->v.val_addr, NULL);
2229 case DW_OP_GNU_implicit_pointer:
2231 char label[MAX_ARTIFICIAL_LABEL_BYTES
2232 + HOST_BITS_PER_WIDE_INT / 2 + 2];
2233 gcc_assert (val1->val_class == dw_val_class_die_ref);
2234 get_ref_die_offset_label (label, val1->v.val_die_ref.die);
2235 dw2_asm_output_offset (DWARF_REF_SIZE, label, debug_info_section, NULL);
2236 dw2_asm_output_data_sleb128 (val2->v.val_int, NULL);
2240 case DW_OP_GNU_entry_value:
2241 dw2_asm_output_data_uleb128 (size_of_locs (val1->v.val_loc), NULL);
2242 output_loc_sequence (val1->v.val_loc, for_eh_or_skip);
2245 case DW_OP_GNU_const_type:
2247 unsigned long o = get_base_type_offset (val1->v.val_die_ref.die), l;
2249 dw2_asm_output_data_uleb128 (o, NULL);
2250 switch (val2->val_class)
2252 case dw_val_class_const:
2253 l = HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR;
2254 dw2_asm_output_data (1, l, NULL);
2255 dw2_asm_output_data (l, val2->v.val_int, NULL);
2257 case dw_val_class_vec:
2259 unsigned int elt_size = val2->v.val_vec.elt_size;
2260 unsigned int len = val2->v.val_vec.length;
2265 dw2_asm_output_data (1, l, NULL);
2266 if (elt_size > sizeof (HOST_WIDE_INT))
2271 for (i = 0, p = val2->v.val_vec.array;
2274 dw2_asm_output_data (elt_size, extract_int (p, elt_size),
2275 "fp or vector constant word %u", i);
2278 case dw_val_class_const_double:
2280 unsigned HOST_WIDE_INT first, second;
2281 l = HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR;
2283 dw2_asm_output_data (1, 2 * l, NULL);
2284 if (WORDS_BIG_ENDIAN)
2286 first = val2->v.val_double.high;
2287 second = val2->v.val_double.low;
2291 first = val2->v.val_double.low;
2292 second = val2->v.val_double.high;
2294 dw2_asm_output_data (l, first, NULL);
2295 dw2_asm_output_data (l, second, NULL);
2303 case DW_OP_GNU_regval_type:
2305 unsigned r = val1->v.val_unsigned;
2306 unsigned long o = get_base_type_offset (val2->v.val_die_ref.die);
2308 if (for_eh_or_skip >= 0)
2310 r = DWARF2_FRAME_REG_OUT (r, for_eh_or_skip);
2311 gcc_assert (size_of_uleb128 (r)
2312 == size_of_uleb128 (val1->v.val_unsigned));
2314 dw2_asm_output_data_uleb128 (r, NULL);
2315 dw2_asm_output_data_uleb128 (o, NULL);
2318 case DW_OP_GNU_deref_type:
2320 unsigned long o = get_base_type_offset (val2->v.val_die_ref.die);
2322 dw2_asm_output_data (1, val1->v.val_int, NULL);
2323 dw2_asm_output_data_uleb128 (o, NULL);
2326 case DW_OP_GNU_convert:
2327 case DW_OP_GNU_reinterpret:
2328 if (loc->dw_loc_oprnd1.val_class == dw_val_class_unsigned_const)
2329 dw2_asm_output_data_uleb128 (val1->v.val_unsigned, NULL);
2332 unsigned long o = get_base_type_offset (val1->v.val_die_ref.die);
2334 dw2_asm_output_data_uleb128 (o, NULL);
2338 case DW_OP_GNU_parameter_ref:
2341 gcc_assert (val1->val_class == dw_val_class_die_ref);
2342 o = get_ref_die_offset (val1->v.val_die_ref.die);
2343 dw2_asm_output_data (4, o, NULL);
2348 /* Other codes have no operands. */
2353 /* Output a sequence of location operations.
2354 The for_eh_or_skip parameter controls whether register numbers are
2355 converted using DWARF2_FRAME_REG_OUT, which is needed in the case that
2356 hard reg numbers have been processed via DWARF_FRAME_REGNUM (i.e. for unwind
2357 info). This should be suppressed for the cases that have not been converted
2358 (i.e. symbolic debug info), by setting the parameter < 0. See PR47324. */
2361 output_loc_sequence (dw_loc_descr_ref loc, int for_eh_or_skip)
2363 for (; loc != NULL; loc = loc->dw_loc_next)
2365 enum dwarf_location_atom opc = loc->dw_loc_opc;
2366 /* Output the opcode. */
2367 if (for_eh_or_skip >= 0
2368 && opc >= DW_OP_breg0 && opc <= DW_OP_breg31)
2370 unsigned r = (opc - DW_OP_breg0);
2371 r = DWARF2_FRAME_REG_OUT (r, for_eh_or_skip);
2372 gcc_assert (r <= 31);
2373 opc = (enum dwarf_location_atom) (DW_OP_breg0 + r);
2375 else if (for_eh_or_skip >= 0
2376 && opc >= DW_OP_reg0 && opc <= DW_OP_reg31)
2378 unsigned r = (opc - DW_OP_reg0);
2379 r = DWARF2_FRAME_REG_OUT (r, for_eh_or_skip);
2380 gcc_assert (r <= 31);
2381 opc = (enum dwarf_location_atom) (DW_OP_reg0 + r);
2384 dw2_asm_output_data (1, opc,
2385 "%s", dwarf_stack_op_name (opc));
2387 /* Output the operand(s) (if any). */
2388 output_loc_operands (loc, for_eh_or_skip);
2392 /* Output location description stack opcode's operands (if any).
2393 The output is single bytes on a line, suitable for .cfi_escape. */
2396 output_loc_operands_raw (dw_loc_descr_ref loc)
2398 dw_val_ref val1 = &loc->dw_loc_oprnd1;
2399 dw_val_ref val2 = &loc->dw_loc_oprnd2;
2401 switch (loc->dw_loc_opc)
2404 case DW_OP_implicit_value:
2405 /* We cannot output addresses in .cfi_escape, only bytes. */
2411 case DW_OP_deref_size:
2412 case DW_OP_xderef_size:
2413 fputc (',', asm_out_file);
2414 dw2_asm_output_data_raw (1, val1->v.val_int);
2419 fputc (',', asm_out_file);
2420 dw2_asm_output_data_raw (2, val1->v.val_int);
2425 fputc (',', asm_out_file);
2426 dw2_asm_output_data_raw (4, val1->v.val_int);
2431 gcc_assert (HOST_BITS_PER_WIDE_INT >= 64);
2432 fputc (',', asm_out_file);
2433 dw2_asm_output_data_raw (8, val1->v.val_int);
2441 gcc_assert (val1->val_class == dw_val_class_loc);
2442 offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3);
2444 fputc (',', asm_out_file);
2445 dw2_asm_output_data_raw (2, offset);
2451 unsigned r = DWARF2_FRAME_REG_OUT (val1->v.val_unsigned, 1);
2452 gcc_assert (size_of_uleb128 (r)
2453 == size_of_uleb128 (val1->v.val_unsigned));
2454 fputc (',', asm_out_file);
2455 dw2_asm_output_data_uleb128_raw (r);
2460 case DW_OP_plus_uconst:
2462 fputc (',', asm_out_file);
2463 dw2_asm_output_data_uleb128_raw (val1->v.val_unsigned);
2466 case DW_OP_bit_piece:
2467 fputc (',', asm_out_file);
2468 dw2_asm_output_data_uleb128_raw (val1->v.val_unsigned);
2469 dw2_asm_output_data_uleb128_raw (val2->v.val_unsigned);
2506 fputc (',', asm_out_file);
2507 dw2_asm_output_data_sleb128_raw (val1->v.val_int);
2512 unsigned r = DWARF2_FRAME_REG_OUT (val1->v.val_unsigned, 1);
2513 gcc_assert (size_of_uleb128 (r)
2514 == size_of_uleb128 (val1->v.val_unsigned));
2515 fputc (',', asm_out_file);
2516 dw2_asm_output_data_uleb128_raw (r);
2517 fputc (',', asm_out_file);
2518 dw2_asm_output_data_sleb128_raw (val2->v.val_int);
2522 case DW_OP_GNU_implicit_pointer:
2523 case DW_OP_GNU_entry_value:
2524 case DW_OP_GNU_const_type:
2525 case DW_OP_GNU_regval_type:
2526 case DW_OP_GNU_deref_type:
2527 case DW_OP_GNU_convert:
2528 case DW_OP_GNU_reinterpret:
2529 case DW_OP_GNU_parameter_ref:
2534 /* Other codes have no operands. */
2540 output_loc_sequence_raw (dw_loc_descr_ref loc)
2544 enum dwarf_location_atom opc = loc->dw_loc_opc;
2545 /* Output the opcode. */
2546 if (opc >= DW_OP_breg0 && opc <= DW_OP_breg31)
2548 unsigned r = (opc - DW_OP_breg0);
2549 r = DWARF2_FRAME_REG_OUT (r, 1);
2550 gcc_assert (r <= 31);
2551 opc = (enum dwarf_location_atom) (DW_OP_breg0 + r);
2553 else if (opc >= DW_OP_reg0 && opc <= DW_OP_reg31)
2555 unsigned r = (opc - DW_OP_reg0);
2556 r = DWARF2_FRAME_REG_OUT (r, 1);
2557 gcc_assert (r <= 31);
2558 opc = (enum dwarf_location_atom) (DW_OP_reg0 + r);
2560 /* Output the opcode. */
2561 fprintf (asm_out_file, "%#x", opc);
2562 output_loc_operands_raw (loc);
2564 if (!loc->dw_loc_next)
2566 loc = loc->dw_loc_next;
2568 fputc (',', asm_out_file);
2572 /* This function builds a dwarf location descriptor sequence from a
2573 dw_cfa_location, adding the given OFFSET to the result of the
2576 struct dw_loc_descr_struct *
2577 build_cfa_loc (dw_cfa_location *cfa, HOST_WIDE_INT offset)
2579 struct dw_loc_descr_struct *head, *tmp;
2581 offset += cfa->offset;
2585 head = new_reg_loc_descr (cfa->reg, cfa->base_offset);
2586 head->dw_loc_oprnd1.val_class = dw_val_class_const;
2587 tmp = new_loc_descr (DW_OP_deref, 0, 0);
2588 add_loc_descr (&head, tmp);
2591 tmp = new_loc_descr (DW_OP_plus_uconst, offset, 0);
2592 add_loc_descr (&head, tmp);
2596 head = new_reg_loc_descr (cfa->reg, offset);
2601 /* This function builds a dwarf location descriptor sequence for
2602 the address at OFFSET from the CFA when stack is aligned to
2605 struct dw_loc_descr_struct *
2606 build_cfa_aligned_loc (dw_cfa_location *cfa,
2607 HOST_WIDE_INT offset, HOST_WIDE_INT alignment)
2609 struct dw_loc_descr_struct *head;
2610 unsigned int dwarf_fp
2611 = DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM);
2613 /* When CFA is defined as FP+OFFSET, emulate stack alignment. */
2614 if (cfa->reg == HARD_FRAME_POINTER_REGNUM && cfa->indirect == 0)
2616 head = new_reg_loc_descr (dwarf_fp, 0);
2617 add_loc_descr (&head, int_loc_descriptor (alignment));
2618 add_loc_descr (&head, new_loc_descr (DW_OP_and, 0, 0));
2619 loc_descr_plus_const (&head, offset);
2622 head = new_reg_loc_descr (dwarf_fp, offset);
2626 /* And now, the support for symbolic debugging information. */
2628 /* .debug_str support. */
2629 static int output_indirect_string (void **, void *);
2631 static void dwarf2out_init (const char *);
2632 static void dwarf2out_finish (const char *);
2633 static void dwarf2out_assembly_start (void);
2634 static void dwarf2out_define (unsigned int, const char *);
2635 static void dwarf2out_undef (unsigned int, const char *);
2636 static void dwarf2out_start_source_file (unsigned, const char *);
2637 static void dwarf2out_end_source_file (unsigned);
2638 static void dwarf2out_function_decl (tree);
2639 static void dwarf2out_begin_block (unsigned, unsigned);
2640 static void dwarf2out_end_block (unsigned, unsigned);
2641 static bool dwarf2out_ignore_block (const_tree);
2642 static void dwarf2out_global_decl (tree);
2643 static void dwarf2out_type_decl (tree, int);
2644 static void dwarf2out_imported_module_or_decl (tree, tree, tree, bool);
2645 static void dwarf2out_imported_module_or_decl_1 (tree, tree, tree,
2647 static void dwarf2out_abstract_function (tree);
2648 static void dwarf2out_var_location (rtx);
2649 static void dwarf2out_begin_function (tree);
2650 static void dwarf2out_set_name (tree, tree);
2652 /* The debug hooks structure. */
2654 const struct gcc_debug_hooks dwarf2_debug_hooks =
2658 dwarf2out_assembly_start,
2661 dwarf2out_start_source_file,
2662 dwarf2out_end_source_file,
2663 dwarf2out_begin_block,
2664 dwarf2out_end_block,
2665 dwarf2out_ignore_block,
2666 dwarf2out_source_line,
2667 dwarf2out_begin_prologue,
2668 #if VMS_DEBUGGING_INFO
2669 dwarf2out_vms_end_prologue,
2670 dwarf2out_vms_begin_epilogue,
2672 debug_nothing_int_charstar,
2673 debug_nothing_int_charstar,
2675 dwarf2out_end_epilogue,
2676 dwarf2out_begin_function,
2677 debug_nothing_int, /* end_function */
2678 dwarf2out_function_decl, /* function_decl */
2679 dwarf2out_global_decl,
2680 dwarf2out_type_decl, /* type_decl */
2681 dwarf2out_imported_module_or_decl,
2682 debug_nothing_tree, /* deferred_inline_function */
2683 /* The DWARF 2 backend tries to reduce debugging bloat by not
2684 emitting the abstract description of inline functions until
2685 something tries to reference them. */
2686 dwarf2out_abstract_function, /* outlining_inline_function */
2687 debug_nothing_rtx, /* label */
2688 debug_nothing_int, /* handle_pch */
2689 dwarf2out_var_location,
2690 dwarf2out_switch_text_section,
2692 1, /* start_end_main_source_file */
2693 TYPE_SYMTAB_IS_DIE /* tree_type_symtab_field */
2696 /* NOTE: In the comments in this file, many references are made to
2697 "Debugging Information Entries". This term is abbreviated as `DIE'
2698 throughout the remainder of this file. */
2700 /* An internal representation of the DWARF output is built, and then
2701 walked to generate the DWARF debugging info. The walk of the internal
2702 representation is done after the entire program has been compiled.
2703 The types below are used to describe the internal representation. */
2705 /* Whether to put type DIEs into their own section .debug_types instead
2706 of making them part of the .debug_info section. Only supported for
2707 Dwarf V4 or higher and the user didn't disable them through
2708 -fno-debug-types-section. It is more efficient to put them in a
2709 separate comdat sections since the linker will then be able to
2710 remove duplicates. But not all tools support .debug_types sections
2713 #define use_debug_types (dwarf_version >= 4 && flag_debug_types_section)
2715 /* Various DIE's use offsets relative to the beginning of the
2716 .debug_info section to refer to each other. */
2718 typedef long int dw_offset;
2720 /* Define typedefs here to avoid circular dependencies. */
2722 typedef struct dw_attr_struct *dw_attr_ref;
2723 typedef struct dw_line_info_struct *dw_line_info_ref;
2724 typedef struct pubname_struct *pubname_ref;
2725 typedef struct dw_ranges_struct *dw_ranges_ref;
2726 typedef struct dw_ranges_by_label_struct *dw_ranges_by_label_ref;
2727 typedef struct comdat_type_struct *comdat_type_node_ref;
2729 /* The entries in the line_info table more-or-less mirror the opcodes
2730 that are used in the real dwarf line table. Arrays of these entries
2731 are collected per section when DWARF2_ASM_LINE_DEBUG_INFO is not
2734 enum dw_line_info_opcode {
2735 /* Emit DW_LNE_set_address; the operand is the label index. */
2738 /* Emit a row to the matrix with the given line. This may be done
2739 via any combination of DW_LNS_copy, DW_LNS_advance_line, and
2743 /* Emit a DW_LNS_set_file. */
2746 /* Emit a DW_LNS_set_column. */
2749 /* Emit a DW_LNS_negate_stmt; the operand is ignored. */
2752 /* Emit a DW_LNS_set_prologue_end/epilogue_begin; the operand is ignored. */
2753 LI_set_prologue_end,
2754 LI_set_epilogue_begin,
2756 /* Emit a DW_LNE_set_discriminator. */
2757 LI_set_discriminator
2760 typedef struct GTY(()) dw_line_info_struct {
2761 enum dw_line_info_opcode opcode;
2763 } dw_line_info_entry;
2765 DEF_VEC_O(dw_line_info_entry);
2766 DEF_VEC_ALLOC_O(dw_line_info_entry, gc);
2768 typedef struct GTY(()) dw_line_info_table_struct {
2769 /* The label that marks the end of this section. */
2770 const char *end_label;
2772 /* The values for the last row of the matrix, as collected in the table.
2773 These are used to minimize the changes to the next row. */
2774 unsigned int file_num;
2775 unsigned int line_num;
2776 unsigned int column_num;
2781 VEC(dw_line_info_entry, gc) *entries;
2782 } dw_line_info_table;
2784 typedef dw_line_info_table *dw_line_info_table_p;
2786 DEF_VEC_P(dw_line_info_table_p);
2787 DEF_VEC_ALLOC_P(dw_line_info_table_p, gc);
2789 /* Each DIE attribute has a field specifying the attribute kind,
2790 a link to the next attribute in the chain, and an attribute value.
2791 Attributes are typically linked below the DIE they modify. */
2793 typedef struct GTY(()) dw_attr_struct {
2794 enum dwarf_attribute dw_attr;
2795 dw_val_node dw_attr_val;
2799 DEF_VEC_O(dw_attr_node);
2800 DEF_VEC_ALLOC_O(dw_attr_node,gc);
2802 /* The Debugging Information Entry (DIE) structure. DIEs form a tree.
2803 The children of each node form a circular list linked by
2804 die_sib. die_child points to the node *before* the "first" child node. */
2806 typedef struct GTY((chain_circular ("%h.die_sib"))) die_struct {
2807 union die_symbol_or_type_node
2809 char * GTY ((tag ("0"))) die_symbol;
2810 comdat_type_node_ref GTY ((tag ("1"))) die_type_node;
2812 GTY ((desc ("use_debug_types"))) die_id;
2813 VEC(dw_attr_node,gc) * die_attr;
2814 dw_die_ref die_parent;
2815 dw_die_ref die_child;
2817 dw_die_ref die_definition; /* ref from a specification to its definition */
2818 dw_offset die_offset;
2819 unsigned long die_abbrev;
2821 /* Die is used and must not be pruned as unused. */
2822 int die_perennial_p;
2823 unsigned int decl_id;
2824 enum dwarf_tag die_tag;
2828 /* Evaluate 'expr' while 'c' is set to each child of DIE in order. */
2829 #define FOR_EACH_CHILD(die, c, expr) do { \
2830 c = die->die_child; \
2834 } while (c != die->die_child); \
2837 /* The pubname structure */
2839 typedef struct GTY(()) pubname_struct {
2845 DEF_VEC_O(pubname_entry);
2846 DEF_VEC_ALLOC_O(pubname_entry, gc);
2848 struct GTY(()) dw_ranges_struct {
2849 /* If this is positive, it's a block number, otherwise it's a
2850 bitwise-negated index into dw_ranges_by_label. */
2854 /* A structure to hold a macinfo entry. */
2856 typedef struct GTY(()) macinfo_struct {
2858 unsigned HOST_WIDE_INT lineno;
2863 DEF_VEC_O(macinfo_entry);
2864 DEF_VEC_ALLOC_O(macinfo_entry, gc);
2866 struct GTY(()) dw_ranges_by_label_struct {
2871 /* The comdat type node structure. */
2872 typedef struct GTY(()) comdat_type_struct
2874 dw_die_ref root_die;
2875 dw_die_ref type_die;
2876 char signature[DWARF_TYPE_SIGNATURE_SIZE];
2877 struct comdat_type_struct *next;
2881 /* The limbo die list structure. */
2882 typedef struct GTY(()) limbo_die_struct {
2885 struct limbo_die_struct *next;
2889 typedef struct skeleton_chain_struct
2893 struct skeleton_chain_struct *parent;
2895 skeleton_chain_node;
2897 /* Define a macro which returns nonzero for a TYPE_DECL which was
2898 implicitly generated for a type.
2900 Note that, unlike the C front-end (which generates a NULL named
2901 TYPE_DECL node for each complete tagged type, each array type,
2902 and each function type node created) the C++ front-end generates
2903 a _named_ TYPE_DECL node for each tagged type node created.
2904 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2905 generate a DW_TAG_typedef DIE for them. Likewise with the Ada
2906 front-end, but for each type, tagged or not. */
2908 #define TYPE_DECL_IS_STUB(decl) \
2909 (DECL_NAME (decl) == NULL_TREE \
2910 || (DECL_ARTIFICIAL (decl) \
2911 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2912 /* This is necessary for stub decls that \
2913 appear in nested inline functions. */ \
2914 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2915 && (decl_ultimate_origin (decl) \
2916 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2918 /* Information concerning the compilation unit's programming
2919 language, and compiler version. */
2921 /* Fixed size portion of the DWARF compilation unit header. */
2922 #define DWARF_COMPILE_UNIT_HEADER_SIZE \
2923 (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 3)
2925 /* Fixed size portion of the DWARF comdat type unit header. */
2926 #define DWARF_COMDAT_TYPE_UNIT_HEADER_SIZE \
2927 (DWARF_COMPILE_UNIT_HEADER_SIZE + DWARF_TYPE_SIGNATURE_SIZE \
2928 + DWARF_OFFSET_SIZE)
2930 /* Fixed size portion of public names info. */
2931 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2933 /* Fixed size portion of the address range info. */
2934 #define DWARF_ARANGES_HEADER_SIZE \
2935 (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \
2936 DWARF2_ADDR_SIZE * 2) \
2937 - DWARF_INITIAL_LENGTH_SIZE)
2939 /* Size of padding portion in the address range info. It must be
2940 aligned to twice the pointer size. */
2941 #define DWARF_ARANGES_PAD_SIZE \
2942 (DWARF_ROUND (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4, \
2943 DWARF2_ADDR_SIZE * 2) \
2944 - (DWARF_INITIAL_LENGTH_SIZE + DWARF_OFFSET_SIZE + 4))
2946 /* Use assembler line directives if available. */
2947 #ifndef DWARF2_ASM_LINE_DEBUG_INFO
2948 #ifdef HAVE_AS_DWARF2_DEBUG_LINE
2949 #define DWARF2_ASM_LINE_DEBUG_INFO 1
2951 #define DWARF2_ASM_LINE_DEBUG_INFO 0
2955 /* Minimum line offset in a special line info. opcode.
2956 This value was chosen to give a reasonable range of values. */
2957 #define DWARF_LINE_BASE -10
2959 /* First special line opcode - leave room for the standard opcodes. */
2960 #define DWARF_LINE_OPCODE_BASE ((int)DW_LNS_set_isa + 1)
2962 /* Range of line offsets in a special line info. opcode. */
2963 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2965 /* Flag that indicates the initial value of the is_stmt_start flag.
2966 In the present implementation, we do not mark any lines as
2967 the beginning of a source statement, because that information
2968 is not made available by the GCC front-end. */
2969 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2971 /* Maximum number of operations per instruction bundle. */
2972 #ifndef DWARF_LINE_DEFAULT_MAX_OPS_PER_INSN
2973 #define DWARF_LINE_DEFAULT_MAX_OPS_PER_INSN 1
2976 /* This location is used by calc_die_sizes() to keep track
2977 the offset of each DIE within the .debug_info section. */
2978 static unsigned long next_die_offset;
2980 /* Record the root of the DIE's built for the current compilation unit. */
2981 static GTY(()) dw_die_ref single_comp_unit_die;
2983 /* A list of type DIEs that have been separated into comdat sections. */
2984 static GTY(()) comdat_type_node *comdat_type_list;
2986 /* A list of DIEs with a NULL parent waiting to be relocated. */
2987 static GTY(()) limbo_die_node *limbo_die_list;
2989 /* A list of DIEs for which we may have to generate
2990 DW_AT_{,MIPS_}linkage_name once their DECL_ASSEMBLER_NAMEs are set. */
2991 static GTY(()) limbo_die_node *deferred_asm_name;
2993 /* Filenames referenced by this compilation unit. */
2994 static GTY((param_is (struct dwarf_file_data))) htab_t file_table;
2996 /* A hash table of references to DIE's that describe declarations.
2997 The key is a DECL_UID() which is a unique number identifying each decl. */
2998 static GTY ((param_is (struct die_struct))) htab_t decl_die_table;
3000 /* A hash table of references to DIE's that describe COMMON blocks.
3001 The key is DECL_UID() ^ die_parent. */
3002 static GTY ((param_is (struct die_struct))) htab_t common_block_die_table;
3004 typedef struct GTY(()) die_arg_entry_struct {
3009 DEF_VEC_O(die_arg_entry);
3010 DEF_VEC_ALLOC_O(die_arg_entry,gc);
3012 /* Node of the variable location list. */
3013 struct GTY ((chain_next ("%h.next"))) var_loc_node {
3014 /* Either NOTE_INSN_VAR_LOCATION, or, for SRA optimized variables,
3015 EXPR_LIST chain. For small bitsizes, bitsize is encoded
3016 in mode of the EXPR_LIST node and first EXPR_LIST operand
3017 is either NOTE_INSN_VAR_LOCATION for a piece with a known
3018 location or NULL for padding. For larger bitsizes,
3019 mode is 0 and first operand is a CONCAT with bitsize
3020 as first CONCAT operand and NOTE_INSN_VAR_LOCATION resp.
3021 NULL as second operand. */
3023 const char * GTY (()) label;
3024 struct var_loc_node * GTY (()) next;
3027 /* Variable location list. */
3028 struct GTY (()) var_loc_list_def {
3029 struct var_loc_node * GTY (()) first;
3031 /* Pointer to the last but one or last element of the
3032 chained list. If the list is empty, both first and
3033 last are NULL, if the list contains just one node
3034 or the last node certainly is not redundant, it points
3035 to the last node, otherwise points to the last but one.
3036 Do not mark it for GC because it is marked through the chain. */
3037 struct var_loc_node * GTY ((skip ("%h"))) last;
3039 /* Pointer to the last element before section switch,
3040 if NULL, either sections weren't switched or first
3041 is after section switch. */
3042 struct var_loc_node * GTY ((skip ("%h"))) last_before_switch;
3044 /* DECL_UID of the variable decl. */
3045 unsigned int decl_id;
3047 typedef struct var_loc_list_def var_loc_list;
3049 /* Call argument location list. */
3050 struct GTY ((chain_next ("%h.next"))) call_arg_loc_node {
3051 rtx GTY (()) call_arg_loc_note;
3052 const char * GTY (()) label;
3053 tree GTY (()) block;
3055 rtx GTY (()) symbol_ref;
3056 struct call_arg_loc_node * GTY (()) next;
3060 /* Table of decl location linked lists. */
3061 static GTY ((param_is (var_loc_list))) htab_t decl_loc_table;
3063 /* Head and tail of call_arg_loc chain. */
3064 static GTY (()) struct call_arg_loc_node *call_arg_locations;
3065 static struct call_arg_loc_node *call_arg_loc_last;
3067 /* Number of call sites in the current function. */
3068 static int call_site_count = -1;
3069 /* Number of tail call sites in the current function. */
3070 static int tail_call_site_count = -1;
3072 /* Vector mapping block numbers to DW_TAG_{lexical_block,inlined_subroutine}
3074 static VEC (dw_die_ref, heap) *block_map;
3076 /* A cached location list. */
3077 struct GTY (()) cached_dw_loc_list_def {
3078 /* The DECL_UID of the decl that this entry describes. */
3079 unsigned int decl_id;
3081 /* The cached location list. */
3082 dw_loc_list_ref loc_list;
3084 typedef struct cached_dw_loc_list_def cached_dw_loc_list;
3086 /* Table of cached location lists. */
3087 static GTY ((param_is (cached_dw_loc_list))) htab_t cached_dw_loc_list_table;
3089 /* A pointer to the base of a list of references to DIE's that
3090 are uniquely identified by their tag, presence/absence of
3091 children DIE's, and list of attribute/value pairs. */
3092 static GTY((length ("abbrev_die_table_allocated")))
3093 dw_die_ref *abbrev_die_table;
3095 /* Number of elements currently allocated for abbrev_die_table. */
3096 static GTY(()) unsigned abbrev_die_table_allocated;
3098 /* Number of elements in type_die_table currently in use. */
3099 static GTY(()) unsigned abbrev_die_table_in_use;
3101 /* Size (in elements) of increments by which we may expand the
3102 abbrev_die_table. */
3103 #define ABBREV_DIE_TABLE_INCREMENT 256
3105 /* A global counter for generating labels for line number data. */
3106 static unsigned int line_info_label_num;
3108 /* The current table to which we should emit line number information
3109 for the current function. This will be set up at the beginning of
3110 assembly for the function. */
3111 static dw_line_info_table *cur_line_info_table;
3113 /* The two default tables of line number info. */
3114 static GTY(()) dw_line_info_table *text_section_line_info;
3115 static GTY(()) dw_line_info_table *cold_text_section_line_info;
3117 /* The set of all non-default tables of line number info. */
3118 static GTY(()) VEC (dw_line_info_table_p, gc) *separate_line_info;
3120 /* A flag to tell pubnames/types export if there is an info section to
3122 static bool info_section_emitted;
3124 /* A pointer to the base of a table that contains a list of publicly
3125 accessible names. */
3126 static GTY (()) VEC (pubname_entry, gc) * pubname_table;
3128 /* A pointer to the base of a table that contains a list of publicly
3129 accessible types. */
3130 static GTY (()) VEC (pubname_entry, gc) * pubtype_table;
3132 /* A pointer to the base of a table that contains a list of macro
3133 defines/undefines (and file start/end markers). */
3134 static GTY (()) VEC (macinfo_entry, gc) * macinfo_table;
3136 /* Array of dies for which we should generate .debug_ranges info. */
3137 static GTY ((length ("ranges_table_allocated"))) dw_ranges_ref ranges_table;
3139 /* Number of elements currently allocated for ranges_table. */
3140 static GTY(()) unsigned ranges_table_allocated;
3142 /* Number of elements in ranges_table currently in use. */
3143 static GTY(()) unsigned ranges_table_in_use;
3145 /* Array of pairs of labels referenced in ranges_table. */
3146 static GTY ((length ("ranges_by_label_allocated")))
3147 dw_ranges_by_label_ref ranges_by_label;
3149 /* Number of elements currently allocated for ranges_by_label. */
3150 static GTY(()) unsigned ranges_by_label_allocated;
3152 /* Number of elements in ranges_by_label currently in use. */
3153 static GTY(()) unsigned ranges_by_label_in_use;
3155 /* Size (in elements) of increments by which we may expand the
3157 #define RANGES_TABLE_INCREMENT 64
3159 /* Whether we have location lists that need outputting */
3160 static GTY(()) bool have_location_lists;
3162 /* Unique label counter. */
3163 static GTY(()) unsigned int loclabel_num;
3165 /* Unique label counter for point-of-call tables. */
3166 static GTY(()) unsigned int poc_label_num;
3168 /* Record whether the function being analyzed contains inlined functions. */
3169 static int current_function_has_inlines;
3171 /* The last file entry emitted by maybe_emit_file(). */
3172 static GTY(()) struct dwarf_file_data * last_emitted_file;
3174 /* Number of internal labels generated by gen_internal_sym(). */
3175 static GTY(()) int label_num;
3177 /* Cached result of previous call to lookup_filename. */
3178 static GTY(()) struct dwarf_file_data * file_table_last_lookup;
3180 static GTY(()) VEC(die_arg_entry,gc) *tmpl_value_parm_die_table;
3182 /* Instances of generic types for which we need to generate debug
3183 info that describe their generic parameters and arguments. That
3184 generation needs to happen once all types are properly laid out so
3185 we do it at the end of compilation. */
3186 static GTY(()) VEC(tree,gc) *generic_type_instances;
3188 /* Offset from the "steady-state frame pointer" to the frame base,
3189 within the current function. */
3190 static HOST_WIDE_INT frame_pointer_fb_offset;
3191 static bool frame_pointer_fb_offset_valid;
3193 static VEC (dw_die_ref, heap) *base_types;
3195 /* Forward declarations for functions defined in this file. */
3197 static int is_pseudo_reg (const_rtx);
3198 static tree type_main_variant (tree);
3199 static int is_tagged_type (const_tree);
3200 static const char *dwarf_tag_name (unsigned);
3201 static const char *dwarf_attr_name (unsigned);
3202 static const char *dwarf_form_name (unsigned);
3203 static tree decl_ultimate_origin (const_tree);
3204 static tree decl_class_context (tree);
3205 static void add_dwarf_attr (dw_die_ref, dw_attr_ref);
3206 static inline enum dw_val_class AT_class (dw_attr_ref);
3207 static void add_AT_flag (dw_die_ref, enum dwarf_attribute, unsigned);
3208 static inline unsigned AT_flag (dw_attr_ref);
3209 static void add_AT_int (dw_die_ref, enum dwarf_attribute, HOST_WIDE_INT);
3210 static inline HOST_WIDE_INT AT_int (dw_attr_ref);
3211 static void add_AT_unsigned (dw_die_ref, enum dwarf_attribute, unsigned HOST_WIDE_INT);
3212 static inline unsigned HOST_WIDE_INT AT_unsigned (dw_attr_ref);
3213 static void add_AT_double (dw_die_ref, enum dwarf_attribute,
3214 HOST_WIDE_INT, unsigned HOST_WIDE_INT);
3215 static inline void add_AT_vec (dw_die_ref, enum dwarf_attribute, unsigned int,
3216 unsigned int, unsigned char *);
3217 static void add_AT_data8 (dw_die_ref, enum dwarf_attribute, unsigned char *);
3218 static hashval_t debug_str_do_hash (const void *);
3219 static int debug_str_eq (const void *, const void *);
3220 static void add_AT_string (dw_die_ref, enum dwarf_attribute, const char *);
3221 static inline const char *AT_string (dw_attr_ref);
3222 static enum dwarf_form AT_string_form (dw_attr_ref);
3223 static void add_AT_die_ref (dw_die_ref, enum dwarf_attribute, dw_die_ref);
3224 static void add_AT_specification (dw_die_ref, dw_die_ref);
3225 static inline dw_die_ref AT_ref (dw_attr_ref);
3226 static inline int AT_ref_external (dw_attr_ref);
3227 static inline void set_AT_ref_external (dw_attr_ref, int);
3228 static void add_AT_fde_ref (dw_die_ref, enum dwarf_attribute, unsigned);
3229 static void add_AT_loc (dw_die_ref, enum dwarf_attribute, dw_loc_descr_ref);
3230 static inline dw_loc_descr_ref AT_loc (dw_attr_ref);
3231 static void add_AT_loc_list (dw_die_ref, enum dwarf_attribute,
3233 static inline dw_loc_list_ref AT_loc_list (dw_attr_ref);
3234 static void add_AT_addr (dw_die_ref, enum dwarf_attribute, rtx);
3235 static inline rtx AT_addr (dw_attr_ref);
3236 static void add_AT_lbl_id (dw_die_ref, enum dwarf_attribute, const char *);
3237 static void add_AT_lineptr (dw_die_ref, enum dwarf_attribute, const char *);
3238 static void add_AT_macptr (dw_die_ref, enum dwarf_attribute, const char *);
3239 static void add_AT_offset (dw_die_ref, enum dwarf_attribute,
3240 unsigned HOST_WIDE_INT);
3241 static void add_AT_range_list (dw_die_ref, enum dwarf_attribute,
3243 static inline const char *AT_lbl (dw_attr_ref);
3244 static dw_attr_ref get_AT (dw_die_ref, enum dwarf_attribute);
3245 static const char *get_AT_low_pc (dw_die_ref);
3246 static const char *get_AT_hi_pc (dw_die_ref);
3247 static const char *get_AT_string (dw_die_ref, enum dwarf_attribute);
3248 static int get_AT_flag (dw_die_ref, enum dwarf_attribute);
3249 static unsigned get_AT_unsigned (dw_die_ref, enum dwarf_attribute);
3250 static inline dw_die_ref get_AT_ref (dw_die_ref, enum dwarf_attribute);
3251 static bool is_cxx (void);
3252 static bool is_fortran (void);
3253 static bool is_ada (void);
3254 static void remove_AT (dw_die_ref, enum dwarf_attribute);
3255 static void remove_child_TAG (dw_die_ref, enum dwarf_tag);
3256 static void add_child_die (dw_die_ref, dw_die_ref);
3257 static dw_die_ref new_die (enum dwarf_tag, dw_die_ref, tree);
3258 static dw_die_ref lookup_type_die (tree);
3259 static dw_die_ref strip_naming_typedef (tree, dw_die_ref);
3260 static dw_die_ref lookup_type_die_strip_naming_typedef (tree);
3261 static void equate_type_number_to_die (tree, dw_die_ref);
3262 static hashval_t decl_die_table_hash (const void *);
3263 static int decl_die_table_eq (const void *, const void *);
3264 static dw_die_ref lookup_decl_die (tree);
3265 static hashval_t common_block_die_table_hash (const void *);
3266 static int common_block_die_table_eq (const void *, const void *);
3267 static hashval_t decl_loc_table_hash (const void *);
3268 static int decl_loc_table_eq (const void *, const void *);
3269 static var_loc_list *lookup_decl_loc (const_tree);
3270 static void equate_decl_number_to_die (tree, dw_die_ref);
3271 static struct var_loc_node *add_var_loc_to_decl (tree, rtx, const char *);
3272 static void print_spaces (FILE *);
3273 static void print_die (dw_die_ref, FILE *);
3274 static dw_die_ref push_new_compile_unit (dw_die_ref, dw_die_ref);
3275 static dw_die_ref pop_compile_unit (dw_die_ref);
3276 static void loc_checksum (dw_loc_descr_ref, struct md5_ctx *);
3277 static void attr_checksum (dw_attr_ref, struct md5_ctx *, int *);
3278 static void die_checksum (dw_die_ref, struct md5_ctx *, int *);
3279 static void checksum_sleb128 (HOST_WIDE_INT, struct md5_ctx *);
3280 static void checksum_uleb128 (unsigned HOST_WIDE_INT, struct md5_ctx *);
3281 static void loc_checksum_ordered (dw_loc_descr_ref, struct md5_ctx *);
3282 static void attr_checksum_ordered (enum dwarf_tag, dw_attr_ref,
3283 struct md5_ctx *, int *);
3284 struct checksum_attributes;
3285 static void collect_checksum_attributes (struct checksum_attributes *, dw_die_ref);
3286 static void die_checksum_ordered (dw_die_ref, struct md5_ctx *, int *);
3287 static void checksum_die_context (dw_die_ref, struct md5_ctx *);
3288 static void generate_type_signature (dw_die_ref, comdat_type_node *);
3289 static int same_loc_p (dw_loc_descr_ref, dw_loc_descr_ref, int *);
3290 static int same_dw_val_p (const dw_val_node *, const dw_val_node *, int *);
3291 static int same_attr_p (dw_attr_ref, dw_attr_ref, int *);
3292 static int same_die_p (dw_die_ref, dw_die_ref, int *);
3293 static int same_die_p_wrap (dw_die_ref, dw_die_ref);
3294 static void compute_section_prefix (dw_die_ref);
3295 static int is_type_die (dw_die_ref);
3296 static int is_comdat_die (dw_die_ref);
3297 static int is_symbol_die (dw_die_ref);
3298 static void assign_symbol_names (dw_die_ref);
3299 static void break_out_includes (dw_die_ref);
3300 static int is_declaration_die (dw_die_ref);
3301 static int should_move_die_to_comdat (dw_die_ref);
3302 static dw_die_ref clone_as_declaration (dw_die_ref);
3303 static dw_die_ref clone_die (dw_die_ref);
3304 static dw_die_ref clone_tree (dw_die_ref);
3305 static void copy_declaration_context (dw_die_ref, dw_die_ref);
3306 static void generate_skeleton_ancestor_tree (skeleton_chain_node *);
3307 static void generate_skeleton_bottom_up (skeleton_chain_node *);
3308 static dw_die_ref generate_skeleton (dw_die_ref);
3309 static dw_die_ref remove_child_or_replace_with_skeleton (dw_die_ref,
3311 static void break_out_comdat_types (dw_die_ref);
3312 static dw_die_ref copy_ancestor_tree (dw_die_ref, dw_die_ref, htab_t);
3313 static void copy_decls_walk (dw_die_ref, dw_die_ref, htab_t);
3314 static void copy_decls_for_unworthy_types (dw_die_ref);
3316 static hashval_t htab_cu_hash (const void *);
3317 static int htab_cu_eq (const void *, const void *);
3318 static void htab_cu_del (void *);
3319 static int check_duplicate_cu (dw_die_ref, htab_t, unsigned *);
3320 static void record_comdat_symbol_number (dw_die_ref, htab_t, unsigned);
3321 static void add_sibling_attributes (dw_die_ref);
3322 static void build_abbrev_table (dw_die_ref);
3323 static void output_location_lists (dw_die_ref);
3324 static int constant_size (unsigned HOST_WIDE_INT);
3325 static unsigned long size_of_die (dw_die_ref);
3326 static void calc_die_sizes (dw_die_ref);
3327 static void calc_base_type_die_sizes (void);
3328 static void mark_dies (dw_die_ref);
3329 static void unmark_dies (dw_die_ref);
3330 static void unmark_all_dies (dw_die_ref);
3331 static unsigned long size_of_pubnames (VEC (pubname_entry,gc) *);
3332 static unsigned long size_of_aranges (void);
3333 static enum dwarf_form value_format (dw_attr_ref);
3334 static void output_value_format (dw_attr_ref);
3335 static void output_abbrev_section (void);
3336 static void output_die_symbol (dw_die_ref);
3337 static void output_die (dw_die_ref);
3338 static void output_compilation_unit_header (void);
3339 static void output_comp_unit (dw_die_ref, int);
3340 static void output_comdat_type_unit (comdat_type_node *);
3341 static const char *dwarf2_name (tree, int);
3342 static void add_pubname (tree, dw_die_ref);
3343 static void add_pubname_string (const char *, dw_die_ref);
3344 static void add_pubtype (tree, dw_die_ref);
3345 static void output_pubnames (VEC (pubname_entry,gc) *);
3346 static void output_aranges (unsigned long);
3347 static unsigned int add_ranges_num (int);
3348 static unsigned int add_ranges (const_tree);
3349 static void add_ranges_by_labels (dw_die_ref, const char *, const char *,
3351 static void output_ranges (void);
3352 static dw_line_info_table *new_line_info_table (void);
3353 static void output_line_info (void);
3354 static void output_file_names (void);
3355 static dw_die_ref base_type_die (tree);
3356 static int is_base_type (tree);
3357 static dw_die_ref subrange_type_die (tree, tree, tree, dw_die_ref);
3358 static dw_die_ref modified_type_die (tree, int, int, dw_die_ref);
3359 static dw_die_ref generic_parameter_die (tree, tree, bool, dw_die_ref);
3360 static dw_die_ref template_parameter_pack_die (tree, tree, dw_die_ref);
3361 static int type_is_enum (const_tree);
3362 static unsigned int dbx_reg_number (const_rtx);
3363 static void add_loc_descr_op_piece (dw_loc_descr_ref *, int);
3364 static dw_loc_descr_ref reg_loc_descriptor (rtx, enum var_init_status);
3365 static dw_loc_descr_ref one_reg_loc_descriptor (unsigned int,
3366 enum var_init_status);
3367 static dw_loc_descr_ref multiple_reg_loc_descriptor (rtx, rtx,
3368 enum var_init_status);
3369 static dw_loc_descr_ref based_loc_descr (rtx, HOST_WIDE_INT,
3370 enum var_init_status);
3371 static int is_based_loc (const_rtx);
3372 static int resolve_one_addr (rtx *, void *);
3373 static dw_loc_descr_ref concat_loc_descriptor (rtx, rtx,
3374 enum var_init_status);
3375 static dw_loc_descr_ref loc_descriptor (rtx, enum machine_mode mode,
3376 enum var_init_status);
3377 static dw_loc_list_ref loc_list_from_tree (tree, int);
3378 static dw_loc_descr_ref loc_descriptor_from_tree (tree, int);
3379 static HOST_WIDE_INT ceiling (HOST_WIDE_INT, unsigned int);
3380 static tree field_type (const_tree);
3381 static unsigned int simple_type_align_in_bits (const_tree);
3382 static unsigned int simple_decl_align_in_bits (const_tree);
3383 static unsigned HOST_WIDE_INT simple_type_size_in_bits (const_tree);
3384 static HOST_WIDE_INT field_byte_offset (const_tree);
3385 static void add_AT_location_description (dw_die_ref, enum dwarf_attribute,
3387 static void add_data_member_location_attribute (dw_die_ref, tree);
3388 static bool add_const_value_attribute (dw_die_ref, rtx);
3389 static void insert_int (HOST_WIDE_INT, unsigned, unsigned char *);
3390 static void insert_double (double_int, unsigned char *);
3391 static void insert_float (const_rtx, unsigned char *);
3392 static rtx rtl_for_decl_location (tree);
3393 static bool add_location_or_const_value_attribute (dw_die_ref, tree, bool,
3394 enum dwarf_attribute);
3395 static bool tree_add_const_value_attribute (dw_die_ref, tree);
3396 static bool tree_add_const_value_attribute_for_decl (dw_die_ref, tree);
3397 static void add_name_attribute (dw_die_ref, const char *);
3398 static void add_gnat_descriptive_type_attribute (dw_die_ref, tree, dw_die_ref);
3399 static void add_comp_dir_attribute (dw_die_ref);
3400 static void add_bound_info (dw_die_ref, enum dwarf_attribute, tree);
3401 static void add_subscript_info (dw_die_ref, tree, bool);
3402 static void add_byte_size_attribute (dw_die_ref, tree);
3403 static void add_bit_offset_attribute (dw_die_ref, tree);
3404 static void add_bit_size_attribute (dw_die_ref, tree);
3405 static void add_prototyped_attribute (dw_die_ref, tree);
3406 static dw_die_ref add_abstract_origin_attribute (dw_die_ref, tree);
3407 static void add_pure_or_virtual_attribute (dw_die_ref, tree);
3408 static void add_src_coords_attributes (dw_die_ref, tree);
3409 static void add_name_and_src_coords_attributes (dw_die_ref, tree);
3410 static void push_decl_scope (tree);
3411 static void pop_decl_scope (void);
3412 static dw_die_ref scope_die_for (tree, dw_die_ref);
3413 static inline int local_scope_p (dw_die_ref);
3414 static inline int class_scope_p (dw_die_ref);
3415 static inline int class_or_namespace_scope_p (dw_die_ref);
3416 static void add_type_attribute (dw_die_ref, tree, int, int, dw_die_ref);
3417 static void add_calling_convention_attribute (dw_die_ref, tree);
3418 static const char *type_tag (const_tree);
3419 static tree member_declared_type (const_tree);
3421 static const char *decl_start_label (tree);
3423 static void gen_array_type_die (tree, dw_die_ref);
3424 static void gen_descr_array_type_die (tree, struct array_descr_info *, dw_die_ref);
3426 static void gen_entry_point_die (tree, dw_die_ref);
3428 static dw_die_ref gen_enumeration_type_die (tree, dw_die_ref);
3429 static dw_die_ref gen_formal_parameter_die (tree, tree, bool, dw_die_ref);
3430 static dw_die_ref gen_formal_parameter_pack_die (tree, tree, dw_die_ref, tree*);
3431 static void gen_unspecified_parameters_die (tree, dw_die_ref);
3432 static void gen_formal_types_die (tree, dw_die_ref);
3433 static void gen_subprogram_die (tree, dw_die_ref);
3434 static void gen_variable_die (tree, tree, dw_die_ref);
3435 static void gen_const_die (tree, dw_die_ref);
3436 static void gen_label_die (tree, dw_die_ref);
3437 static void gen_lexical_block_die (tree, dw_die_ref, int);
3438 static void gen_inlined_subroutine_die (tree, dw_die_ref, int);
3439 static void gen_field_die (tree, dw_die_ref);
3440 static void gen_ptr_to_mbr_type_die (tree, dw_die_ref);
3441 static dw_die_ref gen_compile_unit_die (const char *);
3442 static void gen_inheritance_die (tree, tree, dw_die_ref);
3443 static void gen_member_die (tree, dw_die_ref);
3444 static void gen_struct_or_union_type_die (tree, dw_die_ref,
3445 enum debug_info_usage);
3446 static void gen_subroutine_type_die (tree, dw_die_ref);
3447 static void gen_typedef_die (tree, dw_die_ref);
3448 static void gen_type_die (tree, dw_die_ref);
3449 static void gen_block_die (tree, dw_die_ref, int);
3450 static void decls_for_scope (tree, dw_die_ref, int);
3451 static inline int is_redundant_typedef (const_tree);
3452 static bool is_naming_typedef_decl (const_tree);
3453 static inline dw_die_ref get_context_die (tree);
3454 static void gen_namespace_die (tree, dw_die_ref);
3455 static dw_die_ref gen_decl_die (tree, tree, dw_die_ref);
3456 static dw_die_ref force_decl_die (tree);
3457 static dw_die_ref force_type_die (tree);
3458 static dw_die_ref setup_namespace_context (tree, dw_die_ref);
3459 static dw_die_ref declare_in_namespace (tree, dw_die_ref);
3460 static struct dwarf_file_data * lookup_filename (const char *);
3461 static void retry_incomplete_types (void);
3462 static void gen_type_die_for_member (tree, tree, dw_die_ref);
3463 static void gen_generic_params_dies (tree);
3464 static void gen_tagged_type_die (tree, dw_die_ref, enum debug_info_usage);
3465 static void gen_type_die_with_usage (tree, dw_die_ref, enum debug_info_usage);
3466 static void splice_child_die (dw_die_ref, dw_die_ref);
3467 static int file_info_cmp (const void *, const void *);
3468 static dw_loc_list_ref new_loc_list (dw_loc_descr_ref, const char *,
3469 const char *, const char *);
3470 static void output_loc_list (dw_loc_list_ref);
3471 static char *gen_internal_sym (const char *);
3473 static void prune_unmark_dies (dw_die_ref);
3474 static void prune_unused_types_mark_generic_parms_dies (dw_die_ref);
3475 static void prune_unused_types_mark (dw_die_ref, int);
3476 static void prune_unused_types_walk (dw_die_ref);
3477 static void prune_unused_types_walk_attribs (dw_die_ref);
3478 static void prune_unused_types_prune (dw_die_ref);
3479 static void prune_unused_types (void);
3480 static int maybe_emit_file (struct dwarf_file_data *fd);
3481 static inline const char *AT_vms_delta1 (dw_attr_ref);
3482 static inline const char *AT_vms_delta2 (dw_attr_ref);
3483 static inline void add_AT_vms_delta (dw_die_ref, enum dwarf_attribute,
3484 const char *, const char *);
3485 static void append_entry_to_tmpl_value_parm_die_table (dw_die_ref, tree);
3486 static void gen_remaining_tmpl_value_param_die_attribute (void);
3487 static bool generic_type_p (tree);
3488 static void schedule_generic_params_dies_gen (tree t);
3489 static void gen_scheduled_generic_parms_dies (void);
3491 /* Section names used to hold DWARF debugging information. */
3492 #ifndef DEBUG_INFO_SECTION
3493 #define DEBUG_INFO_SECTION ".debug_info"
3495 #ifndef DEBUG_ABBREV_SECTION
3496 #define DEBUG_ABBREV_SECTION ".debug_abbrev"
3498 #ifndef DEBUG_ARANGES_SECTION
3499 #define DEBUG_ARANGES_SECTION ".debug_aranges"
3501 #ifndef DEBUG_MACINFO_SECTION
3502 #define DEBUG_MACINFO_SECTION ".debug_macinfo"
3504 #ifndef DEBUG_MACRO_SECTION
3505 #define DEBUG_MACRO_SECTION ".debug_macro"
3507 #ifndef DEBUG_LINE_SECTION
3508 #define DEBUG_LINE_SECTION ".debug_line"
3510 #ifndef DEBUG_LOC_SECTION
3511 #define DEBUG_LOC_SECTION ".debug_loc"
3513 #ifndef DEBUG_PUBNAMES_SECTION
3514 #define DEBUG_PUBNAMES_SECTION ".debug_pubnames"
3516 #ifndef DEBUG_PUBTYPES_SECTION
3517 #define DEBUG_PUBTYPES_SECTION ".debug_pubtypes"
3519 #ifndef DEBUG_STR_SECTION
3520 #define DEBUG_STR_SECTION ".debug_str"
3522 #ifndef DEBUG_RANGES_SECTION
3523 #define DEBUG_RANGES_SECTION ".debug_ranges"
3526 /* Standard ELF section names for compiled code and data. */
3527 #ifndef TEXT_SECTION_NAME
3528 #define TEXT_SECTION_NAME ".text"
3531 /* Section flags for .debug_str section. */
3532 #define DEBUG_STR_SECTION_FLAGS \
3533 (HAVE_GAS_SHF_MERGE && flag_merge_debug_strings \
3534 ? SECTION_DEBUG | SECTION_MERGE | SECTION_STRINGS | 1 \
3537 /* Labels we insert at beginning sections we can reference instead of
3538 the section names themselves. */
3540 #ifndef TEXT_SECTION_LABEL
3541 #define TEXT_SECTION_LABEL "Ltext"
3543 #ifndef COLD_TEXT_SECTION_LABEL
3544 #define COLD_TEXT_SECTION_LABEL "Ltext_cold"
3546 #ifndef DEBUG_LINE_SECTION_LABEL
3547 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
3549 #ifndef DEBUG_INFO_SECTION_LABEL
3550 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
3552 #ifndef DEBUG_ABBREV_SECTION_LABEL
3553 #define DEBUG_ABBREV_SECTION_LABEL "Ldebug_abbrev"
3555 #ifndef DEBUG_LOC_SECTION_LABEL
3556 #define DEBUG_LOC_SECTION_LABEL "Ldebug_loc"
3558 #ifndef DEBUG_RANGES_SECTION_LABEL
3559 #define DEBUG_RANGES_SECTION_LABEL "Ldebug_ranges"
3561 #ifndef DEBUG_MACINFO_SECTION_LABEL
3562 #define DEBUG_MACINFO_SECTION_LABEL "Ldebug_macinfo"
3564 #ifndef DEBUG_MACRO_SECTION_LABEL
3565 #define DEBUG_MACRO_SECTION_LABEL "Ldebug_macro"
3569 /* Definitions of defaults for formats and names of various special
3570 (artificial) labels which may be generated within this file (when the -g
3571 options is used and DWARF2_DEBUGGING_INFO is in effect.
3572 If necessary, these may be overridden from within the tm.h file, but
3573 typically, overriding these defaults is unnecessary. */
3575 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3576 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3577 static char cold_text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3578 static char cold_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3579 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3580 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3581 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3582 static char macinfo_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3583 static char loc_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3584 static char ranges_section_label[2 * MAX_ARTIFICIAL_LABEL_BYTES];
3586 #ifndef TEXT_END_LABEL
3587 #define TEXT_END_LABEL "Letext"
3589 #ifndef COLD_END_LABEL
3590 #define COLD_END_LABEL "Letext_cold"
3592 #ifndef BLOCK_BEGIN_LABEL
3593 #define BLOCK_BEGIN_LABEL "LBB"
3595 #ifndef BLOCK_END_LABEL
3596 #define BLOCK_END_LABEL "LBE"
3598 #ifndef LINE_CODE_LABEL
3599 #define LINE_CODE_LABEL "LM"
3603 /* Return the root of the DIE's built for the current compilation unit. */
3605 comp_unit_die (void)
3607 if (!single_comp_unit_die)
3608 single_comp_unit_die = gen_compile_unit_die (NULL);
3609 return single_comp_unit_die;
3612 /* We allow a language front-end to designate a function that is to be
3613 called to "demangle" any name before it is put into a DIE. */
3615 static const char *(*demangle_name_func) (const char *);
3618 dwarf2out_set_demangle_name_func (const char *(*func) (const char *))
3620 demangle_name_func = func;
3623 /* Test if rtl node points to a pseudo register. */
3626 is_pseudo_reg (const_rtx rtl)
3628 return ((REG_P (rtl) && REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
3629 || (GET_CODE (rtl) == SUBREG
3630 && REGNO (SUBREG_REG (rtl)) >= FIRST_PSEUDO_REGISTER));
3633 /* Return a reference to a type, with its const and volatile qualifiers
3637 type_main_variant (tree type)
3639 type = TYPE_MAIN_VARIANT (type);
3641 /* ??? There really should be only one main variant among any group of
3642 variants of a given type (and all of the MAIN_VARIANT values for all
3643 members of the group should point to that one type) but sometimes the C
3644 front-end messes this up for array types, so we work around that bug
3646 if (TREE_CODE (type) == ARRAY_TYPE)
3647 while (type != TYPE_MAIN_VARIANT (type))
3648 type = TYPE_MAIN_VARIANT (type);
3653 /* Return nonzero if the given type node represents a tagged type. */
3656 is_tagged_type (const_tree type)
3658 enum tree_code code = TREE_CODE (type);
3660 return (code == RECORD_TYPE || code == UNION_TYPE
3661 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
3664 /* Set label to debug_info_section_label + die_offset of a DIE reference. */
3667 get_ref_die_offset_label (char *label, dw_die_ref ref)
3669 sprintf (label, "%s+%ld", debug_info_section_label, ref->die_offset);
3672 /* Return die_offset of a DIE reference to a base type. */
3674 static unsigned long int
3675 get_base_type_offset (dw_die_ref ref)
3677 if (ref->die_offset)
3678 return ref->die_offset;
3679 if (comp_unit_die ()->die_abbrev)
3681 calc_base_type_die_sizes ();
3682 gcc_assert (ref->die_offset);
3684 return ref->die_offset;
3687 /* Return die_offset of a DIE reference other than base type. */
3689 static unsigned long int
3690 get_ref_die_offset (dw_die_ref ref)
3692 gcc_assert (ref->die_offset);
3693 return ref->die_offset;
3696 /* Convert a DIE tag into its string name. */
3699 dwarf_tag_name (unsigned int tag)
3703 case DW_TAG_padding:
3704 return "DW_TAG_padding";
3705 case DW_TAG_array_type:
3706 return "DW_TAG_array_type";
3707 case DW_TAG_class_type:
3708 return "DW_TAG_class_type";
3709 case DW_TAG_entry_point:
3710 return "DW_TAG_entry_point";
3711 case DW_TAG_enumeration_type:
3712 return "DW_TAG_enumeration_type";
3713 case DW_TAG_formal_parameter:
3714 return "DW_TAG_formal_parameter";
3715 case DW_TAG_imported_declaration:
3716 return "DW_TAG_imported_declaration";
3718 return "DW_TAG_label";
3719 case DW_TAG_lexical_block:
3720 return "DW_TAG_lexical_block";
3722 return "DW_TAG_member";
3723 case DW_TAG_pointer_type:
3724 return "DW_TAG_pointer_type";
3725 case DW_TAG_reference_type:
3726 return "DW_TAG_reference_type";
3727 case DW_TAG_compile_unit:
3728 return "DW_TAG_compile_unit";
3729 case DW_TAG_string_type:
3730 return "DW_TAG_string_type";
3731 case DW_TAG_structure_type:
3732 return "DW_TAG_structure_type";
3733 case DW_TAG_subroutine_type:
3734 return "DW_TAG_subroutine_type";
3735 case DW_TAG_typedef:
3736 return "DW_TAG_typedef";
3737 case DW_TAG_union_type:
3738 return "DW_TAG_union_type";
3739 case DW_TAG_unspecified_parameters:
3740 return "DW_TAG_unspecified_parameters";
3741 case DW_TAG_variant:
3742 return "DW_TAG_variant";
3743 case DW_TAG_common_block:
3744 return "DW_TAG_common_block";
3745 case DW_TAG_common_inclusion:
3746 return "DW_TAG_common_inclusion";
3747 case DW_TAG_inheritance:
3748 return "DW_TAG_inheritance";
3749 case DW_TAG_inlined_subroutine:
3750 return "DW_TAG_inlined_subroutine";
3752 return "DW_TAG_module";
3753 case DW_TAG_ptr_to_member_type:
3754 return "DW_TAG_ptr_to_member_type";
3755 case DW_TAG_set_type:
3756 return "DW_TAG_set_type";
3757 case DW_TAG_subrange_type:
3758 return "DW_TAG_subrange_type";
3759 case DW_TAG_with_stmt:
3760 return "DW_TAG_with_stmt";
3761 case DW_TAG_access_declaration:
3762 return "DW_TAG_access_declaration";
3763 case DW_TAG_base_type:
3764 return "DW_TAG_base_type";
3765 case DW_TAG_catch_block:
3766 return "DW_TAG_catch_block";
3767 case DW_TAG_const_type:
3768 return "DW_TAG_const_type";
3769 case DW_TAG_constant:
3770 return "DW_TAG_constant";
3771 case DW_TAG_enumerator:
3772 return "DW_TAG_enumerator";
3773 case DW_TAG_file_type:
3774 return "DW_TAG_file_type";
3776 return "DW_TAG_friend";
3777 case DW_TAG_namelist:
3778 return "DW_TAG_namelist";
3779 case DW_TAG_namelist_item:
3780 return "DW_TAG_namelist_item";
3781 case DW_TAG_packed_type:
3782 return "DW_TAG_packed_type";
3783 case DW_TAG_subprogram:
3784 return "DW_TAG_subprogram";
3785 case DW_TAG_template_type_param:
3786 return "DW_TAG_template_type_param";
3787 case DW_TAG_template_value_param:
3788 return "DW_TAG_template_value_param";
3789 case DW_TAG_thrown_type:
3790 return "DW_TAG_thrown_type";
3791 case DW_TAG_try_block:
3792 return "DW_TAG_try_block";
3793 case DW_TAG_variant_part:
3794 return "DW_TAG_variant_part";
3795 case DW_TAG_variable:
3796 return "DW_TAG_variable";
3797 case DW_TAG_volatile_type:
3798 return "DW_TAG_volatile_type";
3799 case DW_TAG_dwarf_procedure:
3800 return "DW_TAG_dwarf_procedure";
3801 case DW_TAG_restrict_type:
3802 return "DW_TAG_restrict_type";
3803 case DW_TAG_interface_type:
3804 return "DW_TAG_interface_type";
3805 case DW_TAG_namespace:
3806 return "DW_TAG_namespace";
3807 case DW_TAG_imported_module:
3808 return "DW_TAG_imported_module";
3809 case DW_TAG_unspecified_type:
3810 return "DW_TAG_unspecified_type";
3811 case DW_TAG_partial_unit:
3812 return "DW_TAG_partial_unit";
3813 case DW_TAG_imported_unit:
3814 return "DW_TAG_imported_unit";
3815 case DW_TAG_condition:
3816 return "DW_TAG_condition";
3817 case DW_TAG_shared_type:
3818 return "DW_TAG_shared_type";
3819 case DW_TAG_type_unit:
3820 return "DW_TAG_type_unit";
3821 case DW_TAG_rvalue_reference_type:
3822 return "DW_TAG_rvalue_reference_type";
3823 case DW_TAG_template_alias:
3824 return "DW_TAG_template_alias";
3825 case DW_TAG_GNU_template_parameter_pack:
3826 return "DW_TAG_GNU_template_parameter_pack";
3827 case DW_TAG_GNU_formal_parameter_pack:
3828 return "DW_TAG_GNU_formal_parameter_pack";
3829 case DW_TAG_MIPS_loop:
3830 return "DW_TAG_MIPS_loop";
3831 case DW_TAG_format_label:
3832 return "DW_TAG_format_label";
3833 case DW_TAG_function_template:
3834 return "DW_TAG_function_template";
3835 case DW_TAG_class_template:
3836 return "DW_TAG_class_template";
3837 case DW_TAG_GNU_BINCL:
3838 return "DW_TAG_GNU_BINCL";
3839 case DW_TAG_GNU_EINCL:
3840 return "DW_TAG_GNU_EINCL";
3841 case DW_TAG_GNU_template_template_param:
3842 return "DW_TAG_GNU_template_template_param";
3843 case DW_TAG_GNU_call_site:
3844 return "DW_TAG_GNU_call_site";
3845 case DW_TAG_GNU_call_site_parameter:
3846 return "DW_TAG_GNU_call_site_parameter";
3848 return "DW_TAG_<unknown>";
3852 /* Convert a DWARF attribute code into its string name. */
3855 dwarf_attr_name (unsigned int attr)
3860 return "DW_AT_sibling";
3861 case DW_AT_location:
3862 return "DW_AT_location";
3864 return "DW_AT_name";
3865 case DW_AT_ordering:
3866 return "DW_AT_ordering";
3867 case DW_AT_subscr_data:
3868 return "DW_AT_subscr_data";
3869 case DW_AT_byte_size:
3870 return "DW_AT_byte_size";
3871 case DW_AT_bit_offset:
3872 return "DW_AT_bit_offset";
3873 case DW_AT_bit_size:
3874 return "DW_AT_bit_size";
3875 case DW_AT_element_list:
3876 return "DW_AT_element_list";
3877 case DW_AT_stmt_list:
3878 return "DW_AT_stmt_list";
3880 return "DW_AT_low_pc";
3882 return "DW_AT_high_pc";
3883 case DW_AT_language:
3884 return "DW_AT_language";
3886 return "DW_AT_member";
3888 return "DW_AT_discr";
3889 case DW_AT_discr_value:
3890 return "DW_AT_discr_value";
3891 case DW_AT_visibility:
3892 return "DW_AT_visibility";
3894 return "DW_AT_import";
3895 case DW_AT_string_length:
3896 return "DW_AT_string_length";
3897 case DW_AT_common_reference:
3898 return "DW_AT_common_reference";
3899 case DW_AT_comp_dir:
3900 return "DW_AT_comp_dir";
3901 case DW_AT_const_value:
3902 return "DW_AT_const_value";
3903 case DW_AT_containing_type:
3904 return "DW_AT_containing_type";
3905 case DW_AT_default_value:
3906 return "DW_AT_default_value";
3908 return "DW_AT_inline";
3909 case DW_AT_is_optional:
3910 return "DW_AT_is_optional";
3911 case DW_AT_lower_bound:
3912 return "DW_AT_lower_bound";
3913 case DW_AT_producer:
3914 return "DW_AT_producer";
3915 case DW_AT_prototyped:
3916 return "DW_AT_prototyped";
3917 case DW_AT_return_addr:
3918 return "DW_AT_return_addr";
3919 case DW_AT_start_scope:
3920 return "DW_AT_start_scope";
3921 case DW_AT_bit_stride:
3922 return "DW_AT_bit_stride";
3923 case DW_AT_upper_bound:
3924 return "DW_AT_upper_bound";
3925 case DW_AT_abstract_origin:
3926 return "DW_AT_abstract_origin";
3927 case DW_AT_accessibility:
3928 return "DW_AT_accessibility";
3929 case DW_AT_address_class:
3930 return "DW_AT_address_class";
3931 case DW_AT_artificial:
3932 return "DW_AT_artificial";
3933 case DW_AT_base_types:
3934 return "DW_AT_base_types";
3935 case DW_AT_calling_convention:
3936 return "DW_AT_calling_convention";
3938 return "DW_AT_count";
3939 case DW_AT_data_member_location:
3940 return "DW_AT_data_member_location";
3941 case DW_AT_decl_column:
3942 return "DW_AT_decl_column";
3943 case DW_AT_decl_file:
3944 return "DW_AT_decl_file";
3945 case DW_AT_decl_line:
3946 return "DW_AT_decl_line";
3947 case DW_AT_declaration:
3948 return "DW_AT_declaration";
3949 case DW_AT_discr_list:
3950 return "DW_AT_discr_list";
3951 case DW_AT_encoding:
3952 return "DW_AT_encoding";
3953 case DW_AT_external:
3954 return "DW_AT_external";
3955 case DW_AT_explicit:
3956 return "DW_AT_explicit";
3957 case DW_AT_frame_base:
3958 return "DW_AT_frame_base";
3960 return "DW_AT_friend";
3961 case DW_AT_identifier_case:
3962 return "DW_AT_identifier_case";
3963 case DW_AT_macro_info:
3964 return "DW_AT_macro_info";
3965 case DW_AT_namelist_items:
3966 return "DW_AT_namelist_items";
3967 case DW_AT_priority:
3968 return "DW_AT_priority";
3970 return "DW_AT_segment";
3971 case DW_AT_specification:
3972 return "DW_AT_specification";
3973 case DW_AT_static_link:
3974 return "DW_AT_static_link";
3976 return "DW_AT_type";
3977 case DW_AT_use_location:
3978 return "DW_AT_use_location";
3979 case DW_AT_variable_parameter:
3980 return "DW_AT_variable_parameter";
3981 case DW_AT_virtuality:
3982 return "DW_AT_virtuality";
3983 case DW_AT_vtable_elem_location:
3984 return "DW_AT_vtable_elem_location";
3986 case DW_AT_allocated:
3987 return "DW_AT_allocated";
3988 case DW_AT_associated:
3989 return "DW_AT_associated";
3990 case DW_AT_data_location:
3991 return "DW_AT_data_location";
3992 case DW_AT_byte_stride:
3993 return "DW_AT_byte_stride";
3994 case DW_AT_entry_pc:
3995 return "DW_AT_entry_pc";
3996 case DW_AT_use_UTF8:
3997 return "DW_AT_use_UTF8";
3998 case DW_AT_extension:
3999 return "DW_AT_extension";
4001 return "DW_AT_ranges";
4002 case DW_AT_trampoline:
4003 return "DW_AT_trampoline";
4004 case DW_AT_call_column:
4005 return "DW_AT_call_column";
4006 case DW_AT_call_file:
4007 return "DW_AT_call_file";
4008 case DW_AT_call_line:
4009 return "DW_AT_call_line";
4010 case DW_AT_object_pointer:
4011 return "DW_AT_object_pointer";
4013 case DW_AT_signature:
4014 return "DW_AT_signature";
4015 case DW_AT_main_subprogram:
4016 return "DW_AT_main_subprogram";
4017 case DW_AT_data_bit_offset:
4018 return "DW_AT_data_bit_offset";
4019 case DW_AT_const_expr:
4020 return "DW_AT_const_expr";
4021 case DW_AT_enum_class:
4022 return "DW_AT_enum_class";
4023 case DW_AT_linkage_name:
4024 return "DW_AT_linkage_name";
4026 case DW_AT_MIPS_fde:
4027 return "DW_AT_MIPS_fde";
4028 case DW_AT_MIPS_loop_begin:
4029 return "DW_AT_MIPS_loop_begin";
4030 case DW_AT_MIPS_tail_loop_begin:
4031 return "DW_AT_MIPS_tail_loop_begin";
4032 case DW_AT_MIPS_epilog_begin:
4033 return "DW_AT_MIPS_epilog_begin";
4034 #if VMS_DEBUGGING_INFO
4035 case DW_AT_HP_prologue:
4036 return "DW_AT_HP_prologue";
4038 case DW_AT_MIPS_loop_unroll_factor:
4039 return "DW_AT_MIPS_loop_unroll_factor";
4041 case DW_AT_MIPS_software_pipeline_depth:
4042 return "DW_AT_MIPS_software_pipeline_depth";
4043 case DW_AT_MIPS_linkage_name:
4044 return "DW_AT_MIPS_linkage_name";
4045 #if VMS_DEBUGGING_INFO
4046 case DW_AT_HP_epilogue:
4047 return "DW_AT_HP_epilogue";
4049 case DW_AT_MIPS_stride:
4050 return "DW_AT_MIPS_stride";
4052 case DW_AT_MIPS_abstract_name:
4053 return "DW_AT_MIPS_abstract_name";
4054 case DW_AT_MIPS_clone_origin:
4055 return "DW_AT_MIPS_clone_origin";
4056 case DW_AT_MIPS_has_inlines:
4057 return "DW_AT_MIPS_has_inlines";
4059 case DW_AT_sf_names:
4060 return "DW_AT_sf_names";
4061 case DW_AT_src_info:
4062 return "DW_AT_src_info";
4063 case DW_AT_mac_info:
4064 return "DW_AT_mac_info";
4065 case DW_AT_src_coords:
4066 return "DW_AT_src_coords";
4067 case DW_AT_body_begin:
4068 return "DW_AT_body_begin";
4069 case DW_AT_body_end:
4070 return "DW_AT_body_end";
4072 case DW_AT_GNU_vector:
4073 return "DW_AT_GNU_vector";
4074 case DW_AT_GNU_guarded_by:
4075 return "DW_AT_GNU_guarded_by";
4076 case DW_AT_GNU_pt_guarded_by:
4077 return "DW_AT_GNU_pt_guarded_by";
4078 case DW_AT_GNU_guarded:
4079 return "DW_AT_GNU_guarded";
4080 case DW_AT_GNU_pt_guarded:
4081 return "DW_AT_GNU_pt_guarded";
4082 case DW_AT_GNU_locks_excluded:
4083 return "DW_AT_GNU_locks_excluded";
4084 case DW_AT_GNU_exclusive_locks_required:
4085 return "DW_AT_GNU_exclusive_locks_required";
4086 case DW_AT_GNU_shared_locks_required:
4087 return "DW_AT_GNU_shared_locks_required";
4088 case DW_AT_GNU_odr_signature:
4089 return "DW_AT_GNU_odr_signature";
4090 case DW_AT_GNU_template_name:
4091 return "DW_AT_GNU_template_name";
4092 case DW_AT_GNU_call_site_value:
4093 return "DW_AT_GNU_call_site_value";
4094 case DW_AT_GNU_call_site_data_value:
4095 return "DW_AT_GNU_call_site_data_value";
4096 case DW_AT_GNU_call_site_target:
4097 return "DW_AT_GNU_call_site_target";
4098 case DW_AT_GNU_call_site_target_clobbered:
4099 return "DW_AT_GNU_call_site_target_clobbered";
4100 case DW_AT_GNU_tail_call:
4101 return "DW_AT_GNU_tail_call";
4102 case DW_AT_GNU_all_tail_call_sites:
4103 return "DW_AT_GNU_all_tail_call_sites";
4104 case DW_AT_GNU_all_call_sites:
4105 return "DW_AT_GNU_all_call_sites";
4106 case DW_AT_GNU_all_source_call_sites:
4107 return "DW_AT_GNU_all_source_call_sites";
4108 case DW_AT_GNU_macros:
4109 return "DW_AT_GNU_macros";
4111 case DW_AT_GNAT_descriptive_type:
4112 return "DW_AT_GNAT_descriptive_type";
4114 case DW_AT_VMS_rtnbeg_pd_address:
4115 return "DW_AT_VMS_rtnbeg_pd_address";
4118 return "DW_AT_<unknown>";
4122 /* Convert a DWARF value form code into its string name. */
4125 dwarf_form_name (unsigned int form)
4130 return "DW_FORM_addr";
4131 case DW_FORM_block2:
4132 return "DW_FORM_block2";
4133 case DW_FORM_block4:
4134 return "DW_FORM_block4";
4136 return "DW_FORM_data2";
4138 return "DW_FORM_data4";
4140 return "DW_FORM_data8";
4141 case DW_FORM_string:
4142 return "DW_FORM_string";
4144 return "DW_FORM_block";
4145 case DW_FORM_block1:
4146 return "DW_FORM_block1";
4148 return "DW_FORM_data1";
4150 return "DW_FORM_flag";
4152 return "DW_FORM_sdata";
4154 return "DW_FORM_strp";
4156 return "DW_FORM_udata";
4157 case DW_FORM_ref_addr:
4158 return "DW_FORM_ref_addr";
4160 return "DW_FORM_ref1";
4162 return "DW_FORM_ref2";
4164 return "DW_FORM_ref4";
4166 return "DW_FORM_ref8";
4167 case DW_FORM_ref_udata:
4168 return "DW_FORM_ref_udata";
4169 case DW_FORM_indirect:
4170 return "DW_FORM_indirect";
4171 case DW_FORM_sec_offset:
4172 return "DW_FORM_sec_offset";
4173 case DW_FORM_exprloc:
4174 return "DW_FORM_exprloc";
4175 case DW_FORM_flag_present:
4176 return "DW_FORM_flag_present";
4177 case DW_FORM_ref_sig8:
4178 return "DW_FORM_ref_sig8";
4180 return "DW_FORM_<unknown>";
4184 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
4185 instance of an inlined instance of a decl which is local to an inline
4186 function, so we have to trace all of the way back through the origin chain
4187 to find out what sort of node actually served as the original seed for the
4191 decl_ultimate_origin (const_tree decl)
4193 if (!CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_COMMON))
4196 /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the
4197 nodes in the function to point to themselves; ignore that if
4198 we're trying to output the abstract instance of this function. */
4199 if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl)
4202 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
4203 most distant ancestor, this should never happen. */
4204 gcc_assert (!DECL_FROM_INLINE (DECL_ORIGIN (decl)));
4206 return DECL_ABSTRACT_ORIGIN (decl);
4209 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
4210 of a virtual function may refer to a base class, so we check the 'this'
4214 decl_class_context (tree decl)
4216 tree context = NULL_TREE;
4218 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
4219 context = DECL_CONTEXT (decl);
4221 context = TYPE_MAIN_VARIANT
4222 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
4224 if (context && !TYPE_P (context))
4225 context = NULL_TREE;
4230 /* Add an attribute/value pair to a DIE. */
4233 add_dwarf_attr (dw_die_ref die, dw_attr_ref attr)
4235 /* Maybe this should be an assert? */
4239 if (die->die_attr == NULL)
4240 die->die_attr = VEC_alloc (dw_attr_node, gc, 1);
4241 VEC_safe_push (dw_attr_node, gc, die->die_attr, attr);
4244 static inline enum dw_val_class
4245 AT_class (dw_attr_ref a)
4247 return a->dw_attr_val.val_class;
4250 /* Add a flag value attribute to a DIE. */
4253 add_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int flag)
4257 attr.dw_attr = attr_kind;
4258 attr.dw_attr_val.val_class = dw_val_class_flag;
4259 attr.dw_attr_val.v.val_flag = flag;
4260 add_dwarf_attr (die, &attr);
4263 static inline unsigned
4264 AT_flag (dw_attr_ref a)
4266 gcc_assert (a && AT_class (a) == dw_val_class_flag);
4267 return a->dw_attr_val.v.val_flag;
4270 /* Add a signed integer attribute value to a DIE. */
4273 add_AT_int (dw_die_ref die, enum dwarf_attribute attr_kind, HOST_WIDE_INT int_val)
4277 attr.dw_attr = attr_kind;
4278 attr.dw_attr_val.val_class = dw_val_class_const;
4279 attr.dw_attr_val.v.val_int = int_val;
4280 add_dwarf_attr (die, &attr);
4283 static inline HOST_WIDE_INT
4284 AT_int (dw_attr_ref a)
4286 gcc_assert (a && AT_class (a) == dw_val_class_const);
4287 return a->dw_attr_val.v.val_int;
4290 /* Add an unsigned integer attribute value to a DIE. */
4293 add_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind,
4294 unsigned HOST_WIDE_INT unsigned_val)
4298 attr.dw_attr = attr_kind;
4299 attr.dw_attr_val.val_class = dw_val_class_unsigned_const;
4300 attr.dw_attr_val.v.val_unsigned = unsigned_val;
4301 add_dwarf_attr (die, &attr);
4304 static inline unsigned HOST_WIDE_INT
4305 AT_unsigned (dw_attr_ref a)
4307 gcc_assert (a && AT_class (a) == dw_val_class_unsigned_const);
4308 return a->dw_attr_val.v.val_unsigned;
4311 /* Add an unsigned double integer attribute value to a DIE. */
4314 add_AT_double (dw_die_ref die, enum dwarf_attribute attr_kind,
4315 HOST_WIDE_INT high, unsigned HOST_WIDE_INT low)
4319 attr.dw_attr = attr_kind;
4320 attr.dw_attr_val.val_class = dw_val_class_const_double;
4321 attr.dw_attr_val.v.val_double.high = high;
4322 attr.dw_attr_val.v.val_double.low = low;
4323 add_dwarf_attr (die, &attr);
4326 /* Add a floating point attribute value to a DIE and return it. */
4329 add_AT_vec (dw_die_ref die, enum dwarf_attribute attr_kind,
4330 unsigned int length, unsigned int elt_size, unsigned char *array)
4334 attr.dw_attr = attr_kind;
4335 attr.dw_attr_val.val_class = dw_val_class_vec;
4336 attr.dw_attr_val.v.val_vec.length = length;
4337 attr.dw_attr_val.v.val_vec.elt_size = elt_size;
4338 attr.dw_attr_val.v.val_vec.array = array;
4339 add_dwarf_attr (die, &attr);
4342 /* Add an 8-byte data attribute value to a DIE. */
4345 add_AT_data8 (dw_die_ref die, enum dwarf_attribute attr_kind,
4346 unsigned char data8[8])
4350 attr.dw_attr = attr_kind;
4351 attr.dw_attr_val.val_class = dw_val_class_data8;
4352 memcpy (attr.dw_attr_val.v.val_data8, data8, 8);
4353 add_dwarf_attr (die, &attr);
4356 /* Hash and equality functions for debug_str_hash. */
4359 debug_str_do_hash (const void *x)
4361 return htab_hash_string (((const struct indirect_string_node *)x)->str);
4365 debug_str_eq (const void *x1, const void *x2)
4367 return strcmp ((((const struct indirect_string_node *)x1)->str),
4368 (const char *)x2) == 0;
4371 /* Add STR to the indirect string hash table. */
4373 static struct indirect_string_node *
4374 find_AT_string (const char *str)
4376 struct indirect_string_node *node;
4379 if (! debug_str_hash)
4380 debug_str_hash = htab_create_ggc (10, debug_str_do_hash,
4381 debug_str_eq, NULL);
4383 slot = htab_find_slot_with_hash (debug_str_hash, str,
4384 htab_hash_string (str), INSERT);
4387 node = ggc_alloc_cleared_indirect_string_node ();
4388 node->str = ggc_strdup (str);
4392 node = (struct indirect_string_node *) *slot;
4398 /* Add a string attribute value to a DIE. */
4401 add_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind, const char *str)
4404 struct indirect_string_node *node;
4406 node = find_AT_string (str);
4408 attr.dw_attr = attr_kind;
4409 attr.dw_attr_val.val_class = dw_val_class_str;
4410 attr.dw_attr_val.v.val_str = node;
4411 add_dwarf_attr (die, &attr);
4414 static inline const char *
4415 AT_string (dw_attr_ref a)
4417 gcc_assert (a && AT_class (a) == dw_val_class_str);
4418 return a->dw_attr_val.v.val_str->str;
4421 /* Find out whether a string should be output inline in DIE
4422 or out-of-line in .debug_str section. */
4424 static enum dwarf_form
4425 AT_string_form (dw_attr_ref a)
4427 struct indirect_string_node *node;
4431 gcc_assert (a && AT_class (a) == dw_val_class_str);
4433 node = a->dw_attr_val.v.val_str;
4437 len = strlen (node->str) + 1;
4439 /* If the string is shorter or equal to the size of the reference, it is
4440 always better to put it inline. */
4441 if (len <= DWARF_OFFSET_SIZE || node->refcount == 0)
4442 return node->form = DW_FORM_string;
4444 /* If we cannot expect the linker to merge strings in .debug_str
4445 section, only put it into .debug_str if it is worth even in this
4447 if (DWARF2_INDIRECT_STRING_SUPPORT_MISSING_ON_TARGET
4448 || ((debug_str_section->common.flags & SECTION_MERGE) == 0
4449 && (len - DWARF_OFFSET_SIZE) * node->refcount <= len))
4450 return node->form = DW_FORM_string;
4452 ASM_GENERATE_INTERNAL_LABEL (label, "LASF", dw2_string_counter);
4453 ++dw2_string_counter;
4454 node->label = xstrdup (label);
4456 return node->form = DW_FORM_strp;
4459 /* Add a DIE reference attribute value to a DIE. */
4462 add_AT_die_ref (dw_die_ref die, enum dwarf_attribute attr_kind, dw_die_ref targ_die)
4466 #ifdef ENABLE_CHECKING
4467 gcc_assert (targ_die != NULL);
4469 /* With LTO we can end up trying to reference something we didn't create
4470 a DIE for. Avoid crashing later on a NULL referenced DIE. */
4471 if (targ_die == NULL)
4475 attr.dw_attr = attr_kind;
4476 attr.dw_attr_val.val_class = dw_val_class_die_ref;
4477 attr.dw_attr_val.v.val_die_ref.die = targ_die;
4478 attr.dw_attr_val.v.val_die_ref.external = 0;
4479 add_dwarf_attr (die, &attr);
4482 /* Add an AT_specification attribute to a DIE, and also make the back
4483 pointer from the specification to the definition. */
4486 add_AT_specification (dw_die_ref die, dw_die_ref targ_die)
4488 add_AT_die_ref (die, DW_AT_specification, targ_die);
4489 gcc_assert (!targ_die->die_definition);
4490 targ_die->die_definition = die;
4493 static inline dw_die_ref
4494 AT_ref (dw_attr_ref a)
4496 gcc_assert (a && AT_class (a) == dw_val_class_die_ref);
4497 return a->dw_attr_val.v.val_die_ref.die;
4501 AT_ref_external (dw_attr_ref a)
4503 if (a && AT_class (a) == dw_val_class_die_ref)
4504 return a->dw_attr_val.v.val_die_ref.external;
4510 set_AT_ref_external (dw_attr_ref a, int i)
4512 gcc_assert (a && AT_class (a) == dw_val_class_die_ref);
4513 a->dw_attr_val.v.val_die_ref.external = i;
4516 /* Add an FDE reference attribute value to a DIE. */
4519 add_AT_fde_ref (dw_die_ref die, enum dwarf_attribute attr_kind, unsigned int targ_fde)
4523 attr.dw_attr = attr_kind;
4524 attr.dw_attr_val.val_class = dw_val_class_fde_ref;
4525 attr.dw_attr_val.v.val_fde_index = targ_fde;
4526 add_dwarf_attr (die, &attr);
4529 /* Add a location description attribute value to a DIE. */
4532 add_AT_loc (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_descr_ref loc)
4536 attr.dw_attr = attr_kind;
4537 attr.dw_attr_val.val_class = dw_val_class_loc;
4538 attr.dw_attr_val.v.val_loc = loc;
4539 add_dwarf_attr (die, &attr);
4542 static inline dw_loc_descr_ref
4543 AT_loc (dw_attr_ref a)
4545 gcc_assert (a && AT_class (a) == dw_val_class_loc);
4546 return a->dw_attr_val.v.val_loc;
4550 add_AT_loc_list (dw_die_ref die, enum dwarf_attribute attr_kind, dw_loc_list_ref loc_list)
4554 attr.dw_attr = attr_kind;
4555 attr.dw_attr_val.val_class = dw_val_class_loc_list;
4556 attr.dw_attr_val.v.val_loc_list = loc_list;
4557 add_dwarf_attr (die, &attr);
4558 have_location_lists = true;
4561 static inline dw_loc_list_ref
4562 AT_loc_list (dw_attr_ref a)
4564 gcc_assert (a && AT_class (a) == dw_val_class_loc_list);
4565 return a->dw_attr_val.v.val_loc_list;
4568 static inline dw_loc_list_ref *
4569 AT_loc_list_ptr (dw_attr_ref a)
4571 gcc_assert (a && AT_class (a) == dw_val_class_loc_list);
4572 return &a->dw_attr_val.v.val_loc_list;
4575 /* Add an address constant attribute value to a DIE. */
4578 add_AT_addr (dw_die_ref die, enum dwarf_attribute attr_kind, rtx addr)
4582 attr.dw_attr = attr_kind;
4583 attr.dw_attr_val.val_class = dw_val_class_addr;
4584 attr.dw_attr_val.v.val_addr = addr;
4585 add_dwarf_attr (die, &attr);
4588 /* Get the RTX from to an address DIE attribute. */
4591 AT_addr (dw_attr_ref a)
4593 gcc_assert (a && AT_class (a) == dw_val_class_addr);
4594 return a->dw_attr_val.v.val_addr;
4597 /* Add a file attribute value to a DIE. */
4600 add_AT_file (dw_die_ref die, enum dwarf_attribute attr_kind,
4601 struct dwarf_file_data *fd)
4605 attr.dw_attr = attr_kind;
4606 attr.dw_attr_val.val_class = dw_val_class_file;
4607 attr.dw_attr_val.v.val_file = fd;
4608 add_dwarf_attr (die, &attr);
4611 /* Get the dwarf_file_data from a file DIE attribute. */
4613 static inline struct dwarf_file_data *
4614 AT_file (dw_attr_ref a)
4616 gcc_assert (a && AT_class (a) == dw_val_class_file);
4617 return a->dw_attr_val.v.val_file;
4620 /* Add a vms delta attribute value to a DIE. */
4623 add_AT_vms_delta (dw_die_ref die, enum dwarf_attribute attr_kind,
4624 const char *lbl1, const char *lbl2)
4628 attr.dw_attr = attr_kind;
4629 attr.dw_attr_val.val_class = dw_val_class_vms_delta;
4630 attr.dw_attr_val.v.val_vms_delta.lbl1 = xstrdup (lbl1);
4631 attr.dw_attr_val.v.val_vms_delta.lbl2 = xstrdup (lbl2);
4632 add_dwarf_attr (die, &attr);
4635 /* Add a label identifier attribute value to a DIE. */
4638 add_AT_lbl_id (dw_die_ref die, enum dwarf_attribute attr_kind, const char *lbl_id)
4642 attr.dw_attr = attr_kind;
4643 attr.dw_attr_val.val_class = dw_val_class_lbl_id;
4644 attr.dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
4645 add_dwarf_attr (die, &attr);
4648 /* Add a section offset attribute value to a DIE, an offset into the
4649 debug_line section. */
4652 add_AT_lineptr (dw_die_ref die, enum dwarf_attribute attr_kind,
4657 attr.dw_attr = attr_kind;
4658 attr.dw_attr_val.val_class = dw_val_class_lineptr;
4659 attr.dw_attr_val.v.val_lbl_id = xstrdup (label);
4660 add_dwarf_attr (die, &attr);
4663 /* Add a section offset attribute value to a DIE, an offset into the
4664 debug_macinfo section. */
4667 add_AT_macptr (dw_die_ref die, enum dwarf_attribute attr_kind,
4672 attr.dw_attr = attr_kind;
4673 attr.dw_attr_val.val_class = dw_val_class_macptr;
4674 attr.dw_attr_val.v.val_lbl_id = xstrdup (label);
4675 add_dwarf_attr (die, &attr);
4678 /* Add an offset attribute value to a DIE. */
4681 add_AT_offset (dw_die_ref die, enum dwarf_attribute attr_kind,
4682 unsigned HOST_WIDE_INT offset)
4686 attr.dw_attr = attr_kind;
4687 attr.dw_attr_val.val_class = dw_val_class_offset;
4688 attr.dw_attr_val.v.val_offset = offset;
4689 add_dwarf_attr (die, &attr);
4692 /* Add an range_list attribute value to a DIE. */
4695 add_AT_range_list (dw_die_ref die, enum dwarf_attribute attr_kind,
4696 long unsigned int offset)
4700 attr.dw_attr = attr_kind;
4701 attr.dw_attr_val.val_class = dw_val_class_range_list;
4702 attr.dw_attr_val.v.val_offset = offset;
4703 add_dwarf_attr (die, &attr);
4706 /* Return the start label of a delta attribute. */
4708 static inline const char *
4709 AT_vms_delta1 (dw_attr_ref a)
4711 gcc_assert (a && (AT_class (a) == dw_val_class_vms_delta));
4712 return a->dw_attr_val.v.val_vms_delta.lbl1;
4715 /* Return the end label of a delta attribute. */
4717 static inline const char *
4718 AT_vms_delta2 (dw_attr_ref a)
4720 gcc_assert (a && (AT_class (a) == dw_val_class_vms_delta));
4721 return a->dw_attr_val.v.val_vms_delta.lbl2;
4724 static inline const char *
4725 AT_lbl (dw_attr_ref a)
4727 gcc_assert (a && (AT_class (a) == dw_val_class_lbl_id
4728 || AT_class (a) == dw_val_class_lineptr
4729 || AT_class (a) == dw_val_class_macptr));
4730 return a->dw_attr_val.v.val_lbl_id;
4733 /* Get the attribute of type attr_kind. */
4736 get_AT (dw_die_ref die, enum dwarf_attribute attr_kind)
4740 dw_die_ref spec = NULL;
4745 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
4746 if (a->dw_attr == attr_kind)
4748 else if (a->dw_attr == DW_AT_specification
4749 || a->dw_attr == DW_AT_abstract_origin)
4753 return get_AT (spec, attr_kind);
4758 /* Return the "low pc" attribute value, typically associated with a subprogram
4759 DIE. Return null if the "low pc" attribute is either not present, or if it
4760 cannot be represented as an assembler label identifier. */
4762 static inline const char *
4763 get_AT_low_pc (dw_die_ref die)
4765 dw_attr_ref a = get_AT (die, DW_AT_low_pc);
4767 return a ? AT_lbl (a) : NULL;
4770 /* Return the "high pc" attribute value, typically associated with a subprogram
4771 DIE. Return null if the "high pc" attribute is either not present, or if it
4772 cannot be represented as an assembler label identifier. */
4774 static inline const char *
4775 get_AT_hi_pc (dw_die_ref die)
4777 dw_attr_ref a = get_AT (die, DW_AT_high_pc);
4779 return a ? AT_lbl (a) : NULL;
4782 /* Return the value of the string attribute designated by ATTR_KIND, or
4783 NULL if it is not present. */
4785 static inline const char *
4786 get_AT_string (dw_die_ref die, enum dwarf_attribute attr_kind)
4788 dw_attr_ref a = get_AT (die, attr_kind);
4790 return a ? AT_string (a) : NULL;
4793 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4794 if it is not present. */
4797 get_AT_flag (dw_die_ref die, enum dwarf_attribute attr_kind)
4799 dw_attr_ref a = get_AT (die, attr_kind);
4801 return a ? AT_flag (a) : 0;
4804 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4805 if it is not present. */
4807 static inline unsigned
4808 get_AT_unsigned (dw_die_ref die, enum dwarf_attribute attr_kind)
4810 dw_attr_ref a = get_AT (die, attr_kind);
4812 return a ? AT_unsigned (a) : 0;
4815 static inline dw_die_ref
4816 get_AT_ref (dw_die_ref die, enum dwarf_attribute attr_kind)
4818 dw_attr_ref a = get_AT (die, attr_kind);
4820 return a ? AT_ref (a) : NULL;
4823 static inline struct dwarf_file_data *
4824 get_AT_file (dw_die_ref die, enum dwarf_attribute attr_kind)
4826 dw_attr_ref a = get_AT (die, attr_kind);
4828 return a ? AT_file (a) : NULL;
4831 /* Return TRUE if the language is C++. */
4836 unsigned int lang = get_AT_unsigned (comp_unit_die (), DW_AT_language);
4838 return lang == DW_LANG_C_plus_plus || lang == DW_LANG_ObjC_plus_plus;
4841 /* Return TRUE if the language is Fortran. */
4846 unsigned int lang = get_AT_unsigned (comp_unit_die (), DW_AT_language);
4848 return (lang == DW_LANG_Fortran77
4849 || lang == DW_LANG_Fortran90
4850 || lang == DW_LANG_Fortran95);
4853 /* Return TRUE if the language is Ada. */
4858 unsigned int lang = get_AT_unsigned (comp_unit_die (), DW_AT_language);
4860 return lang == DW_LANG_Ada95 || lang == DW_LANG_Ada83;
4863 /* Remove the specified attribute if present. */
4866 remove_AT (dw_die_ref die, enum dwarf_attribute attr_kind)
4874 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
4875 if (a->dw_attr == attr_kind)
4877 if (AT_class (a) == dw_val_class_str)
4878 if (a->dw_attr_val.v.val_str->refcount)
4879 a->dw_attr_val.v.val_str->refcount--;
4881 /* VEC_ordered_remove should help reduce the number of abbrevs
4883 VEC_ordered_remove (dw_attr_node, die->die_attr, ix);
4888 /* Remove CHILD from its parent. PREV must have the property that
4889 PREV->DIE_SIB == CHILD. Does not alter CHILD. */
4892 remove_child_with_prev (dw_die_ref child, dw_die_ref prev)
4894 gcc_assert (child->die_parent == prev->die_parent);
4895 gcc_assert (prev->die_sib == child);
4898 gcc_assert (child->die_parent->die_child == child);
4902 prev->die_sib = child->die_sib;
4903 if (child->die_parent->die_child == child)
4904 child->die_parent->die_child = prev;
4907 /* Replace OLD_CHILD with NEW_CHILD. PREV must have the property that
4908 PREV->DIE_SIB == OLD_CHILD. Does not alter OLD_CHILD. */
4911 replace_child (dw_die_ref old_child, dw_die_ref new_child, dw_die_ref prev)
4913 dw_die_ref parent = old_child->die_parent;
4915 gcc_assert (parent == prev->die_parent);
4916 gcc_assert (prev->die_sib == old_child);
4918 new_child->die_parent = parent;
4919 if (prev == old_child)
4921 gcc_assert (parent->die_child == old_child);
4922 new_child->die_sib = new_child;
4926 prev->die_sib = new_child;
4927 new_child->die_sib = old_child->die_sib;
4929 if (old_child->die_parent->die_child == old_child)
4930 old_child->die_parent->die_child = new_child;
4933 /* Move all children from OLD_PARENT to NEW_PARENT. */
4936 move_all_children (dw_die_ref old_parent, dw_die_ref new_parent)
4939 new_parent->die_child = old_parent->die_child;
4940 old_parent->die_child = NULL;
4941 FOR_EACH_CHILD (new_parent, c, c->die_parent = new_parent);
4944 /* Remove child DIE whose die_tag is TAG. Do nothing if no child
4948 remove_child_TAG (dw_die_ref die, enum dwarf_tag tag)
4954 dw_die_ref prev = c;
4956 while (c->die_tag == tag)
4958 remove_child_with_prev (c, prev);
4959 /* Might have removed every child. */
4960 if (c == c->die_sib)
4964 } while (c != die->die_child);
4967 /* Add a CHILD_DIE as the last child of DIE. */
4970 add_child_die (dw_die_ref die, dw_die_ref child_die)
4972 /* FIXME this should probably be an assert. */
4973 if (! die || ! child_die)
4975 gcc_assert (die != child_die);
4977 child_die->die_parent = die;
4980 child_die->die_sib = die->die_child->die_sib;
4981 die->die_child->die_sib = child_die;
4984 child_die->die_sib = child_die;
4985 die->die_child = child_die;
4988 /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT
4989 is the specification, to the end of PARENT's list of children.
4990 This is done by removing and re-adding it. */
4993 splice_child_die (dw_die_ref parent, dw_die_ref child)
4997 /* We want the declaration DIE from inside the class, not the
4998 specification DIE at toplevel. */
4999 if (child->die_parent != parent)
5001 dw_die_ref tmp = get_AT_ref (child, DW_AT_specification);
5007 gcc_assert (child->die_parent == parent
5008 || (child->die_parent
5009 == get_AT_ref (parent, DW_AT_specification)));
5011 for (p = child->die_parent->die_child; ; p = p->die_sib)
5012 if (p->die_sib == child)
5014 remove_child_with_prev (child, p);
5018 add_child_die (parent, child);
5021 /* Return a pointer to a newly created DIE node. */
5023 static inline dw_die_ref
5024 new_die (enum dwarf_tag tag_value, dw_die_ref parent_die, tree t)
5026 dw_die_ref die = ggc_alloc_cleared_die_node ();
5028 die->die_tag = tag_value;
5030 if (parent_die != NULL)
5031 add_child_die (parent_die, die);
5034 limbo_die_node *limbo_node;
5036 limbo_node = ggc_alloc_cleared_limbo_die_node ();
5037 limbo_node->die = die;
5038 limbo_node->created_for = t;
5039 limbo_node->next = limbo_die_list;
5040 limbo_die_list = limbo_node;
5046 /* Return the DIE associated with the given type specifier. */
5048 static inline dw_die_ref
5049 lookup_type_die (tree type)
5051 return TYPE_SYMTAB_DIE (type);
5054 /* Given a TYPE_DIE representing the type TYPE, if TYPE is an
5055 anonymous type named by the typedef TYPE_DIE, return the DIE of the
5056 anonymous type instead the one of the naming typedef. */
5058 static inline dw_die_ref
5059 strip_naming_typedef (tree type, dw_die_ref type_die)
5062 && TREE_CODE (type) == RECORD_TYPE
5064 && type_die->die_tag == DW_TAG_typedef
5065 && is_naming_typedef_decl (TYPE_NAME (type)))
5066 type_die = get_AT_ref (type_die, DW_AT_type);
5070 /* Like lookup_type_die, but if type is an anonymous type named by a
5071 typedef[1], return the DIE of the anonymous type instead the one of
5072 the naming typedef. This is because in gen_typedef_die, we did
5073 equate the anonymous struct named by the typedef with the DIE of
5074 the naming typedef. So by default, lookup_type_die on an anonymous
5075 struct yields the DIE of the naming typedef.
5077 [1]: Read the comment of is_naming_typedef_decl to learn about what
5078 a naming typedef is. */
5080 static inline dw_die_ref
5081 lookup_type_die_strip_naming_typedef (tree type)
5083 dw_die_ref die = lookup_type_die (type);
5084 return strip_naming_typedef (type, die);
5087 /* Equate a DIE to a given type specifier. */
5090 equate_type_number_to_die (tree type, dw_die_ref type_die)
5092 TYPE_SYMTAB_DIE (type) = type_die;
5095 /* Returns a hash value for X (which really is a die_struct). */
5098 decl_die_table_hash (const void *x)
5100 return (hashval_t) ((const_dw_die_ref) x)->decl_id;
5103 /* Return nonzero if decl_id of die_struct X is the same as UID of decl *Y. */
5106 decl_die_table_eq (const void *x, const void *y)
5108 return (((const_dw_die_ref) x)->decl_id == DECL_UID ((const_tree) y));
5111 /* Return the DIE associated with a given declaration. */
5113 static inline dw_die_ref
5114 lookup_decl_die (tree decl)
5116 return (dw_die_ref) htab_find_with_hash (decl_die_table, decl, DECL_UID (decl));
5119 /* Returns a hash value for X (which really is a var_loc_list). */
5122 decl_loc_table_hash (const void *x)
5124 return (hashval_t) ((const var_loc_list *) x)->decl_id;
5127 /* Return nonzero if decl_id of var_loc_list X is the same as
5131 decl_loc_table_eq (const void *x, const void *y)
5133 return (((const var_loc_list *) x)->decl_id == DECL_UID ((const_tree) y));
5136 /* Return the var_loc list associated with a given declaration. */
5138 static inline var_loc_list *
5139 lookup_decl_loc (const_tree decl)
5141 if (!decl_loc_table)
5143 return (var_loc_list *)
5144 htab_find_with_hash (decl_loc_table, decl, DECL_UID (decl));
5147 /* Returns a hash value for X (which really is a cached_dw_loc_list_list). */
5150 cached_dw_loc_list_table_hash (const void *x)
5152 return (hashval_t) ((const cached_dw_loc_list *) x)->decl_id;
5155 /* Return nonzero if decl_id of cached_dw_loc_list X is the same as
5159 cached_dw_loc_list_table_eq (const void *x, const void *y)
5161 return (((const cached_dw_loc_list *) x)->decl_id
5162 == DECL_UID ((const_tree) y));
5165 /* Equate a DIE to a particular declaration. */
5168 equate_decl_number_to_die (tree decl, dw_die_ref decl_die)
5170 unsigned int decl_id = DECL_UID (decl);
5173 slot = htab_find_slot_with_hash (decl_die_table, decl, decl_id, INSERT);
5175 decl_die->decl_id = decl_id;
5178 /* Return how many bits covers PIECE EXPR_LIST. */
5181 decl_piece_bitsize (rtx piece)
5183 int ret = (int) GET_MODE (piece);
5186 gcc_assert (GET_CODE (XEXP (piece, 0)) == CONCAT
5187 && CONST_INT_P (XEXP (XEXP (piece, 0), 0)));
5188 return INTVAL (XEXP (XEXP (piece, 0), 0));
5191 /* Return pointer to the location of location note in PIECE EXPR_LIST. */
5194 decl_piece_varloc_ptr (rtx piece)
5196 if ((int) GET_MODE (piece))
5197 return &XEXP (piece, 0);
5199 return &XEXP (XEXP (piece, 0), 1);
5202 /* Create an EXPR_LIST for location note LOC_NOTE covering BITSIZE bits.
5203 Next is the chain of following piece nodes. */
5206 decl_piece_node (rtx loc_note, HOST_WIDE_INT bitsize, rtx next)
5208 if (bitsize <= (int) MAX_MACHINE_MODE)
5209 return alloc_EXPR_LIST (bitsize, loc_note, next);
5211 return alloc_EXPR_LIST (0, gen_rtx_CONCAT (VOIDmode,
5216 /* Return rtx that should be stored into loc field for
5217 LOC_NOTE and BITPOS/BITSIZE. */
5220 construct_piece_list (rtx loc_note, HOST_WIDE_INT bitpos,
5221 HOST_WIDE_INT bitsize)
5225 loc_note = decl_piece_node (loc_note, bitsize, NULL_RTX);
5227 loc_note = decl_piece_node (NULL_RTX, bitpos, loc_note);
5232 /* This function either modifies location piece list *DEST in
5233 place (if SRC and INNER is NULL), or copies location piece list
5234 *SRC to *DEST while modifying it. Location BITPOS is modified
5235 to contain LOC_NOTE, any pieces overlapping it are removed resp.
5236 not copied and if needed some padding around it is added.
5237 When modifying in place, DEST should point to EXPR_LIST where
5238 earlier pieces cover PIECE_BITPOS bits, when copying SRC points
5239 to the start of the whole list and INNER points to the EXPR_LIST
5240 where earlier pieces cover PIECE_BITPOS bits. */
5243 adjust_piece_list (rtx *dest, rtx *src, rtx *inner,
5244 HOST_WIDE_INT bitpos, HOST_WIDE_INT piece_bitpos,
5245 HOST_WIDE_INT bitsize, rtx loc_note)
5248 bool copy = inner != NULL;
5252 /* First copy all nodes preceeding the current bitpos. */
5253 while (src != inner)
5255 *dest = decl_piece_node (*decl_piece_varloc_ptr (*src),
5256 decl_piece_bitsize (*src), NULL_RTX);
5257 dest = &XEXP (*dest, 1);
5258 src = &XEXP (*src, 1);
5261 /* Add padding if needed. */
5262 if (bitpos != piece_bitpos)
5264 *dest = decl_piece_node (NULL_RTX, bitpos - piece_bitpos,
5265 copy ? NULL_RTX : *dest);
5266 dest = &XEXP (*dest, 1);
5268 else if (*dest && decl_piece_bitsize (*dest) == bitsize)
5271 /* A piece with correct bitpos and bitsize already exist,
5272 just update the location for it and return. */
5273 *decl_piece_varloc_ptr (*dest) = loc_note;
5276 /* Add the piece that changed. */
5277 *dest = decl_piece_node (loc_note, bitsize, copy ? NULL_RTX : *dest);
5278 dest = &XEXP (*dest, 1);
5279 /* Skip over pieces that overlap it. */
5280 diff = bitpos - piece_bitpos + bitsize;
5283 while (diff > 0 && *src)
5286 diff -= decl_piece_bitsize (piece);
5288 src = &XEXP (piece, 1);
5291 *src = XEXP (piece, 1);
5292 free_EXPR_LIST_node (piece);
5295 /* Add padding if needed. */
5296 if (diff < 0 && *src)
5300 *dest = decl_piece_node (NULL_RTX, -diff, copy ? NULL_RTX : *dest);
5301 dest = &XEXP (*dest, 1);
5305 /* Finally copy all nodes following it. */
5308 *dest = decl_piece_node (*decl_piece_varloc_ptr (*src),
5309 decl_piece_bitsize (*src), NULL_RTX);
5310 dest = &XEXP (*dest, 1);
5311 src = &XEXP (*src, 1);
5315 /* Add a variable location node to the linked list for DECL. */
5317 static struct var_loc_node *
5318 add_var_loc_to_decl (tree decl, rtx loc_note, const char *label)
5320 unsigned int decl_id;
5323 struct var_loc_node *loc = NULL;
5324 HOST_WIDE_INT bitsize = -1, bitpos = -1;
5326 if (DECL_DEBUG_EXPR_IS_FROM (decl))
5328 tree realdecl = DECL_DEBUG_EXPR (decl);
5329 if (realdecl && handled_component_p (realdecl))
5331 HOST_WIDE_INT maxsize;
5334 = get_ref_base_and_extent (realdecl, &bitpos, &bitsize, &maxsize);
5335 if (!DECL_P (innerdecl)
5336 || DECL_IGNORED_P (innerdecl)
5337 || TREE_STATIC (innerdecl)
5339 || bitpos + bitsize > 256
5340 || bitsize != maxsize)
5346 decl_id = DECL_UID (decl);
5347 slot = htab_find_slot_with_hash (decl_loc_table, decl, decl_id, INSERT);
5350 temp = ggc_alloc_cleared_var_loc_list ();
5351 temp->decl_id = decl_id;
5355 temp = (var_loc_list *) *slot;
5357 /* For PARM_DECLs try to keep around the original incoming value,
5358 even if that means we'll emit a zero-range .debug_loc entry. */
5360 && temp->first == temp->last
5361 && TREE_CODE (decl) == PARM_DECL
5362 && GET_CODE (temp->first->loc) == NOTE
5363 && NOTE_VAR_LOCATION_DECL (temp->first->loc) == decl
5364 && DECL_INCOMING_RTL (decl)
5365 && NOTE_VAR_LOCATION_LOC (temp->first->loc)
5366 && GET_CODE (NOTE_VAR_LOCATION_LOC (temp->first->loc))
5367 == GET_CODE (DECL_INCOMING_RTL (decl))
5368 && prev_real_insn (temp->first->loc) == NULL_RTX
5370 || !rtx_equal_p (NOTE_VAR_LOCATION_LOC (temp->first->loc),
5371 NOTE_VAR_LOCATION_LOC (loc_note))
5372 || (NOTE_VAR_LOCATION_STATUS (temp->first->loc)
5373 != NOTE_VAR_LOCATION_STATUS (loc_note))))
5375 loc = ggc_alloc_cleared_var_loc_node ();
5376 temp->first->next = loc;
5378 loc->loc = construct_piece_list (loc_note, bitpos, bitsize);
5380 else if (temp->last)
5382 struct var_loc_node *last = temp->last, *unused = NULL;
5383 rtx *piece_loc = NULL, last_loc_note;
5384 int piece_bitpos = 0;
5388 gcc_assert (last->next == NULL);
5390 if (bitsize != -1 && GET_CODE (last->loc) == EXPR_LIST)
5392 piece_loc = &last->loc;
5395 int cur_bitsize = decl_piece_bitsize (*piece_loc);
5396 if (piece_bitpos + cur_bitsize > bitpos)
5398 piece_bitpos += cur_bitsize;
5399 piece_loc = &XEXP (*piece_loc, 1);
5403 /* TEMP->LAST here is either pointer to the last but one or
5404 last element in the chained list, LAST is pointer to the
5406 if (label && strcmp (last->label, label) == 0)
5408 /* For SRA optimized variables if there weren't any real
5409 insns since last note, just modify the last node. */
5410 if (piece_loc != NULL)
5412 adjust_piece_list (piece_loc, NULL, NULL,
5413 bitpos, piece_bitpos, bitsize, loc_note);
5416 /* If the last note doesn't cover any instructions, remove it. */
5417 if (temp->last != last)
5419 temp->last->next = NULL;
5422 gcc_assert (strcmp (last->label, label) != 0);
5426 gcc_assert (temp->first == temp->last
5427 || (temp->first->next == temp->last
5428 && TREE_CODE (decl) == PARM_DECL));
5429 memset (temp->last, '\0', sizeof (*temp->last));
5430 temp->last->loc = construct_piece_list (loc_note, bitpos, bitsize);
5434 if (bitsize == -1 && NOTE_P (last->loc))
5435 last_loc_note = last->loc;
5436 else if (piece_loc != NULL
5437 && *piece_loc != NULL_RTX
5438 && piece_bitpos == bitpos
5439 && decl_piece_bitsize (*piece_loc) == bitsize)
5440 last_loc_note = *decl_piece_varloc_ptr (*piece_loc);
5442 last_loc_note = NULL_RTX;
5443 /* If the current location is the same as the end of the list,
5444 and either both or neither of the locations is uninitialized,
5445 we have nothing to do. */
5446 if (last_loc_note == NULL_RTX
5447 || (!rtx_equal_p (NOTE_VAR_LOCATION_LOC (last_loc_note),
5448 NOTE_VAR_LOCATION_LOC (loc_note)))
5449 || ((NOTE_VAR_LOCATION_STATUS (last_loc_note)
5450 != NOTE_VAR_LOCATION_STATUS (loc_note))
5451 && ((NOTE_VAR_LOCATION_STATUS (last_loc_note)
5452 == VAR_INIT_STATUS_UNINITIALIZED)
5453 || (NOTE_VAR_LOCATION_STATUS (loc_note)
5454 == VAR_INIT_STATUS_UNINITIALIZED))))
5456 /* Add LOC to the end of list and update LAST. If the last
5457 element of the list has been removed above, reuse its
5458 memory for the new node, otherwise allocate a new one. */
5462 memset (loc, '\0', sizeof (*loc));
5465 loc = ggc_alloc_cleared_var_loc_node ();
5466 if (bitsize == -1 || piece_loc == NULL)
5467 loc->loc = construct_piece_list (loc_note, bitpos, bitsize);
5469 adjust_piece_list (&loc->loc, &last->loc, piece_loc,
5470 bitpos, piece_bitpos, bitsize, loc_note);
5472 /* Ensure TEMP->LAST will point either to the new last but one
5473 element of the chain, or to the last element in it. */
5474 if (last != temp->last)
5482 loc = ggc_alloc_cleared_var_loc_node ();
5485 loc->loc = construct_piece_list (loc_note, bitpos, bitsize);
5490 /* Keep track of the number of spaces used to indent the
5491 output of the debugging routines that print the structure of
5492 the DIE internal representation. */
5493 static int print_indent;
5495 /* Indent the line the number of spaces given by print_indent. */
5498 print_spaces (FILE *outfile)
5500 fprintf (outfile, "%*s", print_indent, "");
5503 /* Print a type signature in hex. */
5506 print_signature (FILE *outfile, char *sig)
5510 for (i = 0; i < DWARF_TYPE_SIGNATURE_SIZE; i++)
5511 fprintf (outfile, "%02x", sig[i] & 0xff);
5514 /* Print the information associated with a given DIE, and its children.
5515 This routine is a debugging aid only. */
5518 print_die (dw_die_ref die, FILE *outfile)
5524 print_spaces (outfile);
5525 fprintf (outfile, "DIE %4ld: %s (%p)\n",
5526 die->die_offset, dwarf_tag_name (die->die_tag),
5528 print_spaces (outfile);
5529 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
5530 fprintf (outfile, " offset: %ld", die->die_offset);
5531 fprintf (outfile, " mark: %d\n", die->die_mark);
5533 if (use_debug_types && die->die_id.die_type_node)
5535 print_spaces (outfile);
5536 fprintf (outfile, " signature: ");
5537 print_signature (outfile, die->die_id.die_type_node->signature);
5538 fprintf (outfile, "\n");
5541 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
5543 print_spaces (outfile);
5544 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
5546 switch (AT_class (a))
5548 case dw_val_class_addr:
5549 fprintf (outfile, "address");
5551 case dw_val_class_offset:
5552 fprintf (outfile, "offset");
5554 case dw_val_class_loc:
5555 fprintf (outfile, "location descriptor");
5557 case dw_val_class_loc_list:
5558 fprintf (outfile, "location list -> label:%s",
5559 AT_loc_list (a)->ll_symbol);
5561 case dw_val_class_range_list:
5562 fprintf (outfile, "range list");
5564 case dw_val_class_const:
5565 fprintf (outfile, HOST_WIDE_INT_PRINT_DEC, AT_int (a));
5567 case dw_val_class_unsigned_const:
5568 fprintf (outfile, HOST_WIDE_INT_PRINT_UNSIGNED, AT_unsigned (a));
5570 case dw_val_class_const_double:
5571 fprintf (outfile, "constant ("HOST_WIDE_INT_PRINT_DEC","\
5572 HOST_WIDE_INT_PRINT_UNSIGNED")",
5573 a->dw_attr_val.v.val_double.high,
5574 a->dw_attr_val.v.val_double.low);
5576 case dw_val_class_vec:
5577 fprintf (outfile, "floating-point or vector constant");
5579 case dw_val_class_flag:
5580 fprintf (outfile, "%u", AT_flag (a));
5582 case dw_val_class_die_ref:
5583 if (AT_ref (a) != NULL)
5585 if (use_debug_types && AT_ref (a)->die_id.die_type_node)
5587 fprintf (outfile, "die -> signature: ");
5588 print_signature (outfile,
5589 AT_ref (a)->die_id.die_type_node->signature);
5591 else if (! use_debug_types && AT_ref (a)->die_id.die_symbol)
5592 fprintf (outfile, "die -> label: %s",
5593 AT_ref (a)->die_id.die_symbol);
5595 fprintf (outfile, "die -> %ld", AT_ref (a)->die_offset);
5596 fprintf (outfile, " (%p)", (void *) AT_ref (a));
5599 fprintf (outfile, "die -> <null>");
5601 case dw_val_class_vms_delta:
5602 fprintf (outfile, "delta: @slotcount(%s-%s)",
5603 AT_vms_delta2 (a), AT_vms_delta1 (a));
5605 case dw_val_class_lbl_id:
5606 case dw_val_class_lineptr:
5607 case dw_val_class_macptr:
5608 fprintf (outfile, "label: %s", AT_lbl (a));
5610 case dw_val_class_str:
5611 if (AT_string (a) != NULL)
5612 fprintf (outfile, "\"%s\"", AT_string (a));
5614 fprintf (outfile, "<null>");
5616 case dw_val_class_file:
5617 fprintf (outfile, "\"%s\" (%d)", AT_file (a)->filename,
5618 AT_file (a)->emitted_number);
5620 case dw_val_class_data8:
5624 for (i = 0; i < 8; i++)
5625 fprintf (outfile, "%02x", a->dw_attr_val.v.val_data8[i]);
5632 fprintf (outfile, "\n");
5635 if (die->die_child != NULL)
5638 FOR_EACH_CHILD (die, c, print_die (c, outfile));
5641 if (print_indent == 0)
5642 fprintf (outfile, "\n");
5645 /* Print the information collected for a given DIE. */
5648 debug_dwarf_die (dw_die_ref die)
5650 print_die (die, stderr);
5653 /* Print all DWARF information collected for the compilation unit.
5654 This routine is a debugging aid only. */
5660 print_die (comp_unit_die (), stderr);
5663 /* Start a new compilation unit DIE for an include file. OLD_UNIT is the CU
5664 for the enclosing include file, if any. BINCL_DIE is the DW_TAG_GNU_BINCL
5665 DIE that marks the start of the DIEs for this include file. */
5668 push_new_compile_unit (dw_die_ref old_unit, dw_die_ref bincl_die)
5670 const char *filename = get_AT_string (bincl_die, DW_AT_name);
5671 dw_die_ref new_unit = gen_compile_unit_die (filename);
5673 new_unit->die_sib = old_unit;
5677 /* Close an include-file CU and reopen the enclosing one. */
5680 pop_compile_unit (dw_die_ref old_unit)
5682 dw_die_ref new_unit = old_unit->die_sib;
5684 old_unit->die_sib = NULL;
5688 #define CHECKSUM(FOO) md5_process_bytes (&(FOO), sizeof (FOO), ctx)
5689 #define CHECKSUM_STRING(FOO) md5_process_bytes ((FOO), strlen (FOO), ctx)
5691 /* Calculate the checksum of a location expression. */
5694 loc_checksum (dw_loc_descr_ref loc, struct md5_ctx *ctx)
5698 tem = (loc->dtprel << 8) | ((unsigned int) loc->dw_loc_opc);
5700 CHECKSUM (loc->dw_loc_oprnd1);
5701 CHECKSUM (loc->dw_loc_oprnd2);
5704 /* Calculate the checksum of an attribute. */
5707 attr_checksum (dw_attr_ref at, struct md5_ctx *ctx, int *mark)
5709 dw_loc_descr_ref loc;
5712 CHECKSUM (at->dw_attr);
5714 /* We don't care that this was compiled with a different compiler
5715 snapshot; if the output is the same, that's what matters. */
5716 if (at->dw_attr == DW_AT_producer)
5719 switch (AT_class (at))
5721 case dw_val_class_const:
5722 CHECKSUM (at->dw_attr_val.v.val_int);
5724 case dw_val_class_unsigned_const:
5725 CHECKSUM (at->dw_attr_val.v.val_unsigned);
5727 case dw_val_class_const_double:
5728 CHECKSUM (at->dw_attr_val.v.val_double);
5730 case dw_val_class_vec:
5731 CHECKSUM (at->dw_attr_val.v.val_vec);
5733 case dw_val_class_flag:
5734 CHECKSUM (at->dw_attr_val.v.val_flag);
5736 case dw_val_class_str:
5737 CHECKSUM_STRING (AT_string (at));
5740 case dw_val_class_addr:
5742 gcc_assert (GET_CODE (r) == SYMBOL_REF);
5743 CHECKSUM_STRING (XSTR (r, 0));
5746 case dw_val_class_offset:
5747 CHECKSUM (at->dw_attr_val.v.val_offset);
5750 case dw_val_class_loc:
5751 for (loc = AT_loc (at); loc; loc = loc->dw_loc_next)
5752 loc_checksum (loc, ctx);
5755 case dw_val_class_die_ref:
5756 die_checksum (AT_ref (at), ctx, mark);
5759 case dw_val_class_fde_ref:
5760 case dw_val_class_vms_delta:
5761 case dw_val_class_lbl_id:
5762 case dw_val_class_lineptr:
5763 case dw_val_class_macptr:
5766 case dw_val_class_file:
5767 CHECKSUM_STRING (AT_file (at)->filename);
5770 case dw_val_class_data8:
5771 CHECKSUM (at->dw_attr_val.v.val_data8);
5779 /* Calculate the checksum of a DIE. */
5782 die_checksum (dw_die_ref die, struct md5_ctx *ctx, int *mark)
5788 /* To avoid infinite recursion. */
5791 CHECKSUM (die->die_mark);
5794 die->die_mark = ++(*mark);
5796 CHECKSUM (die->die_tag);
5798 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
5799 attr_checksum (a, ctx, mark);
5801 FOR_EACH_CHILD (die, c, die_checksum (c, ctx, mark));
5805 #undef CHECKSUM_STRING
5807 /* For DWARF-4 types, include the trailing NULL when checksumming strings. */
5808 #define CHECKSUM(FOO) md5_process_bytes (&(FOO), sizeof (FOO), ctx)
5809 #define CHECKSUM_STRING(FOO) md5_process_bytes ((FOO), strlen (FOO) + 1, ctx)
5810 #define CHECKSUM_SLEB128(FOO) checksum_sleb128 ((FOO), ctx)
5811 #define CHECKSUM_ULEB128(FOO) checksum_uleb128 ((FOO), ctx)
5812 #define CHECKSUM_ATTR(FOO) \
5813 if (FOO) attr_checksum_ordered (die->die_tag, (FOO), ctx, mark)
5815 /* Calculate the checksum of a number in signed LEB128 format. */
5818 checksum_sleb128 (HOST_WIDE_INT value, struct md5_ctx *ctx)
5825 byte = (value & 0x7f);
5827 more = !((value == 0 && (byte & 0x40) == 0)
5828 || (value == -1 && (byte & 0x40) != 0));
5837 /* Calculate the checksum of a number in unsigned LEB128 format. */
5840 checksum_uleb128 (unsigned HOST_WIDE_INT value, struct md5_ctx *ctx)
5844 unsigned char byte = (value & 0x7f);
5847 /* More bytes to follow. */
5855 /* Checksum the context of the DIE. This adds the names of any
5856 surrounding namespaces or structures to the checksum. */
5859 checksum_die_context (dw_die_ref die, struct md5_ctx *ctx)
5863 int tag = die->die_tag;
5865 if (tag != DW_TAG_namespace
5866 && tag != DW_TAG_structure_type
5867 && tag != DW_TAG_class_type)
5870 name = get_AT_string (die, DW_AT_name);
5872 spec = get_AT_ref (die, DW_AT_specification);
5876 if (die->die_parent != NULL)
5877 checksum_die_context (die->die_parent, ctx);
5879 CHECKSUM_ULEB128 ('C');
5880 CHECKSUM_ULEB128 (tag);
5882 CHECKSUM_STRING (name);
5885 /* Calculate the checksum of a location expression. */
5888 loc_checksum_ordered (dw_loc_descr_ref loc, struct md5_ctx *ctx)
5890 /* Special case for lone DW_OP_plus_uconst: checksum as if the location
5891 were emitted as a DW_FORM_sdata instead of a location expression. */
5892 if (loc->dw_loc_opc == DW_OP_plus_uconst && loc->dw_loc_next == NULL)
5894 CHECKSUM_ULEB128 (DW_FORM_sdata);
5895 CHECKSUM_SLEB128 ((HOST_WIDE_INT) loc->dw_loc_oprnd1.v.val_unsigned);
5899 /* Otherwise, just checksum the raw location expression. */
5902 CHECKSUM_ULEB128 (loc->dw_loc_opc);
5903 CHECKSUM (loc->dw_loc_oprnd1);
5904 CHECKSUM (loc->dw_loc_oprnd2);
5905 loc = loc->dw_loc_next;
5909 /* Calculate the checksum of an attribute. */
5912 attr_checksum_ordered (enum dwarf_tag tag, dw_attr_ref at,
5913 struct md5_ctx *ctx, int *mark)
5915 dw_loc_descr_ref loc;
5918 if (AT_class (at) == dw_val_class_die_ref)
5920 dw_die_ref target_die = AT_ref (at);
5922 /* For pointer and reference types, we checksum only the (qualified)
5923 name of the target type (if there is a name). For friend entries,
5924 we checksum only the (qualified) name of the target type or function.
5925 This allows the checksum to remain the same whether the target type
5926 is complete or not. */
5927 if ((at->dw_attr == DW_AT_type
5928 && (tag == DW_TAG_pointer_type
5929 || tag == DW_TAG_reference_type
5930 || tag == DW_TAG_rvalue_reference_type
5931 || tag == DW_TAG_ptr_to_member_type))
5932 || (at->dw_attr == DW_AT_friend
5933 && tag == DW_TAG_friend))
5935 dw_attr_ref name_attr = get_AT (target_die, DW_AT_name);
5937 if (name_attr != NULL)
5939 dw_die_ref decl = get_AT_ref (target_die, DW_AT_specification);
5943 CHECKSUM_ULEB128 ('N');
5944 CHECKSUM_ULEB128 (at->dw_attr);
5945 if (decl->die_parent != NULL)
5946 checksum_die_context (decl->die_parent, ctx);
5947 CHECKSUM_ULEB128 ('E');
5948 CHECKSUM_STRING (AT_string (name_attr));
5953 /* For all other references to another DIE, we check to see if the
5954 target DIE has already been visited. If it has, we emit a
5955 backward reference; if not, we descend recursively. */
5956 if (target_die->die_mark > 0)
5958 CHECKSUM_ULEB128 ('R');
5959 CHECKSUM_ULEB128 (at->dw_attr);
5960 CHECKSUM_ULEB128 (target_die->die_mark);
5964 dw_die_ref decl = get_AT_ref (target_die, DW_AT_specification);
5968 target_die->die_mark = ++(*mark);
5969 CHECKSUM_ULEB128 ('T');
5970 CHECKSUM_ULEB128 (at->dw_attr);
5971 if (decl->die_parent != NULL)
5972 checksum_die_context (decl->die_parent, ctx);
5973 die_checksum_ordered (target_die, ctx, mark);
5978 CHECKSUM_ULEB128 ('A');
5979 CHECKSUM_ULEB128 (at->dw_attr);
5981 switch (AT_class (at))
5983 case dw_val_class_const:
5984 CHECKSUM_ULEB128 (DW_FORM_sdata);
5985 CHECKSUM_SLEB128 (at->dw_attr_val.v.val_int);
5988 case dw_val_class_unsigned_const:
5989 CHECKSUM_ULEB128 (DW_FORM_sdata);
5990 CHECKSUM_SLEB128 ((int) at->dw_attr_val.v.val_unsigned);
5993 case dw_val_class_const_double:
5994 CHECKSUM_ULEB128 (DW_FORM_block);
5995 CHECKSUM_ULEB128 (sizeof (at->dw_attr_val.v.val_double));
5996 CHECKSUM (at->dw_attr_val.v.val_double);
5999 case dw_val_class_vec:
6000 CHECKSUM_ULEB128 (DW_FORM_block);
6001 CHECKSUM_ULEB128 (sizeof (at->dw_attr_val.v.val_vec));
6002 CHECKSUM (at->dw_attr_val.v.val_vec);
6005 case dw_val_class_flag:
6006 CHECKSUM_ULEB128 (DW_FORM_flag);
6007 CHECKSUM_ULEB128 (at->dw_attr_val.v.val_flag ? 1 : 0);
6010 case dw_val_class_str:
6011 CHECKSUM_ULEB128 (DW_FORM_string);
6012 CHECKSUM_STRING (AT_string (at));
6015 case dw_val_class_addr:
6017 gcc_assert (GET_CODE (r) == SYMBOL_REF);
6018 CHECKSUM_ULEB128 (DW_FORM_string);
6019 CHECKSUM_STRING (XSTR (r, 0));
6022 case dw_val_class_offset:
6023 CHECKSUM_ULEB128 (DW_FORM_sdata);
6024 CHECKSUM_ULEB128 (at->dw_attr_val.v.val_offset);
6027 case dw_val_class_loc:
6028 for (loc = AT_loc (at); loc; loc = loc->dw_loc_next)
6029 loc_checksum_ordered (loc, ctx);
6032 case dw_val_class_fde_ref:
6033 case dw_val_class_lbl_id:
6034 case dw_val_class_lineptr:
6035 case dw_val_class_macptr:
6038 case dw_val_class_file:
6039 CHECKSUM_ULEB128 (DW_FORM_string);
6040 CHECKSUM_STRING (AT_file (at)->filename);
6043 case dw_val_class_data8:
6044 CHECKSUM (at->dw_attr_val.v.val_data8);
6052 struct checksum_attributes
6054 dw_attr_ref at_name;
6055 dw_attr_ref at_type;
6056 dw_attr_ref at_friend;
6057 dw_attr_ref at_accessibility;
6058 dw_attr_ref at_address_class;
6059 dw_attr_ref at_allocated;
6060 dw_attr_ref at_artificial;
6061 dw_attr_ref at_associated;
6062 dw_attr_ref at_binary_scale;
6063 dw_attr_ref at_bit_offset;
6064 dw_attr_ref at_bit_size;
6065 dw_attr_ref at_bit_stride;
6066 dw_attr_ref at_byte_size;
6067 dw_attr_ref at_byte_stride;
6068 dw_attr_ref at_const_value;
6069 dw_attr_ref at_containing_type;
6070 dw_attr_ref at_count;
6071 dw_attr_ref at_data_location;
6072 dw_attr_ref at_data_member_location;
6073 dw_attr_ref at_decimal_scale;
6074 dw_attr_ref at_decimal_sign;
6075 dw_attr_ref at_default_value;
6076 dw_attr_ref at_digit_count;
6077 dw_attr_ref at_discr;
6078 dw_attr_ref at_discr_list;
6079 dw_attr_ref at_discr_value;
6080 dw_attr_ref at_encoding;
6081 dw_attr_ref at_endianity;
6082 dw_attr_ref at_explicit;
6083 dw_attr_ref at_is_optional;
6084 dw_attr_ref at_location;
6085 dw_attr_ref at_lower_bound;
6086 dw_attr_ref at_mutable;
6087 dw_attr_ref at_ordering;
6088 dw_attr_ref at_picture_string;
6089 dw_attr_ref at_prototyped;
6090 dw_attr_ref at_small;
6091 dw_attr_ref at_segment;
6092 dw_attr_ref at_string_length;
6093 dw_attr_ref at_threads_scaled;
6094 dw_attr_ref at_upper_bound;
6095 dw_attr_ref at_use_location;
6096 dw_attr_ref at_use_UTF8;
6097 dw_attr_ref at_variable_parameter;
6098 dw_attr_ref at_virtuality;
6099 dw_attr_ref at_visibility;
6100 dw_attr_ref at_vtable_elem_location;
6103 /* Collect the attributes that we will want to use for the checksum. */
6106 collect_checksum_attributes (struct checksum_attributes *attrs, dw_die_ref die)
6111 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
6122 attrs->at_friend = a;
6124 case DW_AT_accessibility:
6125 attrs->at_accessibility = a;
6127 case DW_AT_address_class:
6128 attrs->at_address_class = a;
6130 case DW_AT_allocated:
6131 attrs->at_allocated = a;
6133 case DW_AT_artificial:
6134 attrs->at_artificial = a;
6136 case DW_AT_associated:
6137 attrs->at_associated = a;
6139 case DW_AT_binary_scale:
6140 attrs->at_binary_scale = a;
6142 case DW_AT_bit_offset:
6143 attrs->at_bit_offset = a;
6145 case DW_AT_bit_size:
6146 attrs->at_bit_size = a;
6148 case DW_AT_bit_stride:
6149 attrs->at_bit_stride = a;
6151 case DW_AT_byte_size:
6152 attrs->at_byte_size = a;
6154 case DW_AT_byte_stride:
6155 attrs->at_byte_stride = a;
6157 case DW_AT_const_value:
6158 attrs->at_const_value = a;
6160 case DW_AT_containing_type:
6161 attrs->at_containing_type = a;
6164 attrs->at_count = a;
6166 case DW_AT_data_location:
6167 attrs->at_data_location = a;
6169 case DW_AT_data_member_location:
6170 attrs->at_data_member_location = a;
6172 case DW_AT_decimal_scale:
6173 attrs->at_decimal_scale = a;
6175 case DW_AT_decimal_sign:
6176 attrs->at_decimal_sign = a;
6178 case DW_AT_default_value:
6179 attrs->at_default_value = a;
6181 case DW_AT_digit_count:
6182 attrs->at_digit_count = a;
6185 attrs->at_discr = a;
6187 case DW_AT_discr_list:
6188 attrs->at_discr_list = a;
6190 case DW_AT_discr_value:
6191 attrs->at_discr_value = a;
6193 case DW_AT_encoding:
6194 attrs->at_encoding = a;
6196 case DW_AT_endianity:
6197 attrs->at_endianity = a;
6199 case DW_AT_explicit:
6200 attrs->at_explicit = a;
6202 case DW_AT_is_optional:
6203 attrs->at_is_optional = a;
6205 case DW_AT_location:
6206 attrs->at_location = a;
6208 case DW_AT_lower_bound:
6209 attrs->at_lower_bound = a;
6212 attrs->at_mutable = a;
6214 case DW_AT_ordering:
6215 attrs->at_ordering = a;
6217 case DW_AT_picture_string:
6218 attrs->at_picture_string = a;
6220 case DW_AT_prototyped:
6221 attrs->at_prototyped = a;
6224 attrs->at_small = a;
6227 attrs->at_segment = a;
6229 case DW_AT_string_length:
6230 attrs->at_string_length = a;
6232 case DW_AT_threads_scaled:
6233 attrs->at_threads_scaled = a;
6235 case DW_AT_upper_bound:
6236 attrs->at_upper_bound = a;
6238 case DW_AT_use_location:
6239 attrs->at_use_location = a;
6241 case DW_AT_use_UTF8:
6242 attrs->at_use_UTF8 = a;
6244 case DW_AT_variable_parameter:
6245 attrs->at_variable_parameter = a;
6247 case DW_AT_virtuality:
6248 attrs->at_virtuality = a;
6250 case DW_AT_visibility:
6251 attrs->at_visibility = a;
6253 case DW_AT_vtable_elem_location:
6254 attrs->at_vtable_elem_location = a;
6262 /* Calculate the checksum of a DIE, using an ordered subset of attributes. */
6265 die_checksum_ordered (dw_die_ref die, struct md5_ctx *ctx, int *mark)
6269 struct checksum_attributes attrs;
6271 CHECKSUM_ULEB128 ('D');
6272 CHECKSUM_ULEB128 (die->die_tag);
6274 memset (&attrs, 0, sizeof (attrs));
6276 decl = get_AT_ref (die, DW_AT_specification);
6278 collect_checksum_attributes (&attrs, decl);
6279 collect_checksum_attributes (&attrs, die);
6281 CHECKSUM_ATTR (attrs.at_name);
6282 CHECKSUM_ATTR (attrs.at_accessibility);
6283 CHECKSUM_ATTR (attrs.at_address_class);
6284 CHECKSUM_ATTR (attrs.at_allocated);
6285 CHECKSUM_ATTR (attrs.at_artificial);
6286 CHECKSUM_ATTR (attrs.at_associated);
6287 CHECKSUM_ATTR (attrs.at_binary_scale);
6288 CHECKSUM_ATTR (attrs.at_bit_offset);
6289 CHECKSUM_ATTR (attrs.at_bit_size);
6290 CHECKSUM_ATTR (attrs.at_bit_stride);
6291 CHECKSUM_ATTR (attrs.at_byte_size);
6292 CHECKSUM_ATTR (attrs.at_byte_stride);
6293 CHECKSUM_ATTR (attrs.at_const_value);
6294 CHECKSUM_ATTR (attrs.at_containing_type);
6295 CHECKSUM_ATTR (attrs.at_count);
6296 CHECKSUM_ATTR (attrs.at_data_location);
6297 CHECKSUM_ATTR (attrs.at_data_member_location);
6298 CHECKSUM_ATTR (attrs.at_decimal_scale);
6299 CHECKSUM_ATTR (attrs.at_decimal_sign);
6300 CHECKSUM_ATTR (attrs.at_default_value);
6301 CHECKSUM_ATTR (attrs.at_digit_count);
6302 CHECKSUM_ATTR (attrs.at_discr);
6303 CHECKSUM_ATTR (attrs.at_discr_list);
6304 CHECKSUM_ATTR (attrs.at_discr_value);
6305 CHECKSUM_ATTR (attrs.at_encoding);
6306 CHECKSUM_ATTR (attrs.at_endianity);
6307 CHECKSUM_ATTR (attrs.at_explicit);
6308 CHECKSUM_ATTR (attrs.at_is_optional);
6309 CHECKSUM_ATTR (attrs.at_location);
6310 CHECKSUM_ATTR (attrs.at_lower_bound);
6311 CHECKSUM_ATTR (attrs.at_mutable);
6312 CHECKSUM_ATTR (attrs.at_ordering);
6313 CHECKSUM_ATTR (attrs.at_picture_string);
6314 CHECKSUM_ATTR (attrs.at_prototyped);
6315 CHECKSUM_ATTR (attrs.at_small);
6316 CHECKSUM_ATTR (attrs.at_segment);
6317 CHECKSUM_ATTR (attrs.at_string_length);
6318 CHECKSUM_ATTR (attrs.at_threads_scaled);
6319 CHECKSUM_ATTR (attrs.at_upper_bound);
6320 CHECKSUM_ATTR (attrs.at_use_location);
6321 CHECKSUM_ATTR (attrs.at_use_UTF8);
6322 CHECKSUM_ATTR (attrs.at_variable_parameter);
6323 CHECKSUM_ATTR (attrs.at_virtuality);
6324 CHECKSUM_ATTR (attrs.at_visibility);
6325 CHECKSUM_ATTR (attrs.at_vtable_elem_location);
6326 CHECKSUM_ATTR (attrs.at_type);
6327 CHECKSUM_ATTR (attrs.at_friend);
6329 /* Checksum the child DIEs, except for nested types and member functions. */
6332 dw_attr_ref name_attr;
6335 name_attr = get_AT (c, DW_AT_name);
6336 if ((is_type_die (c) || c->die_tag == DW_TAG_subprogram)
6337 && name_attr != NULL)
6339 CHECKSUM_ULEB128 ('S');
6340 CHECKSUM_ULEB128 (c->die_tag);
6341 CHECKSUM_STRING (AT_string (name_attr));
6345 /* Mark this DIE so it gets processed when unmarking. */
6346 if (c->die_mark == 0)
6348 die_checksum_ordered (c, ctx, mark);
6350 } while (c != die->die_child);
6352 CHECKSUM_ULEB128 (0);
6356 #undef CHECKSUM_STRING
6357 #undef CHECKSUM_ATTR
6358 #undef CHECKSUM_LEB128
6359 #undef CHECKSUM_ULEB128
6361 /* Generate the type signature for DIE. This is computed by generating an
6362 MD5 checksum over the DIE's tag, its relevant attributes, and its
6363 children. Attributes that are references to other DIEs are processed
6364 by recursion, using the MARK field to prevent infinite recursion.
6365 If the DIE is nested inside a namespace or another type, we also
6366 need to include that context in the signature. The lower 64 bits
6367 of the resulting MD5 checksum comprise the signature. */
6370 generate_type_signature (dw_die_ref die, comdat_type_node *type_node)
6374 unsigned char checksum[16];
6378 name = get_AT_string (die, DW_AT_name);
6379 decl = get_AT_ref (die, DW_AT_specification);
6381 /* First, compute a signature for just the type name (and its surrounding
6382 context, if any. This is stored in the type unit DIE for link-time
6383 ODR (one-definition rule) checking. */
6385 if (is_cxx() && name != NULL)
6387 md5_init_ctx (&ctx);
6389 /* Checksum the names of surrounding namespaces and structures. */
6390 if (decl != NULL && decl->die_parent != NULL)
6391 checksum_die_context (decl->die_parent, &ctx);
6393 md5_process_bytes (&die->die_tag, sizeof (die->die_tag), &ctx);
6394 md5_process_bytes (name, strlen (name) + 1, &ctx);
6395 md5_finish_ctx (&ctx, checksum);
6397 add_AT_data8 (type_node->root_die, DW_AT_GNU_odr_signature, &checksum[8]);
6400 /* Next, compute the complete type signature. */
6402 md5_init_ctx (&ctx);
6404 die->die_mark = mark;
6406 /* Checksum the names of surrounding namespaces and structures. */
6407 if (decl != NULL && decl->die_parent != NULL)
6408 checksum_die_context (decl->die_parent, &ctx);
6410 /* Checksum the DIE and its children. */
6411 die_checksum_ordered (die, &ctx, &mark);
6412 unmark_all_dies (die);
6413 md5_finish_ctx (&ctx, checksum);
6415 /* Store the signature in the type node and link the type DIE and the
6416 type node together. */
6417 memcpy (type_node->signature, &checksum[16 - DWARF_TYPE_SIGNATURE_SIZE],
6418 DWARF_TYPE_SIGNATURE_SIZE);
6419 die->die_id.die_type_node = type_node;
6420 type_node->type_die = die;
6422 /* If the DIE is a specification, link its declaration to the type node
6425 decl->die_id.die_type_node = type_node;
6428 /* Do the location expressions look same? */
6430 same_loc_p (dw_loc_descr_ref loc1, dw_loc_descr_ref loc2, int *mark)
6432 return loc1->dw_loc_opc == loc2->dw_loc_opc
6433 && same_dw_val_p (&loc1->dw_loc_oprnd1, &loc2->dw_loc_oprnd1, mark)
6434 && same_dw_val_p (&loc1->dw_loc_oprnd2, &loc2->dw_loc_oprnd2, mark);
6437 /* Do the values look the same? */
6439 same_dw_val_p (const dw_val_node *v1, const dw_val_node *v2, int *mark)
6441 dw_loc_descr_ref loc1, loc2;
6444 if (v1->val_class != v2->val_class)
6447 switch (v1->val_class)
6449 case dw_val_class_const:
6450 return v1->v.val_int == v2->v.val_int;
6451 case dw_val_class_unsigned_const:
6452 return v1->v.val_unsigned == v2->v.val_unsigned;
6453 case dw_val_class_const_double:
6454 return v1->v.val_double.high == v2->v.val_double.high
6455 && v1->v.val_double.low == v2->v.val_double.low;
6456 case dw_val_class_vec:
6457 if (v1->v.val_vec.length != v2->v.val_vec.length
6458 || v1->v.val_vec.elt_size != v2->v.val_vec.elt_size)
6460 if (memcmp (v1->v.val_vec.array, v2->v.val_vec.array,
6461 v1->v.val_vec.length * v1->v.val_vec.elt_size))
6464 case dw_val_class_flag:
6465 return v1->v.val_flag == v2->v.val_flag;
6466 case dw_val_class_str:
6467 return !strcmp(v1->v.val_str->str, v2->v.val_str->str);
6469 case dw_val_class_addr:
6470 r1 = v1->v.val_addr;
6471 r2 = v2->v.val_addr;
6472 if (GET_CODE (r1) != GET_CODE (r2))
6474 return !rtx_equal_p (r1, r2);
6476 case dw_val_class_offset:
6477 return v1->v.val_offset == v2->v.val_offset;
6479 case dw_val_class_loc:
6480 for (loc1 = v1->v.val_loc, loc2 = v2->v.val_loc;
6482 loc1 = loc1->dw_loc_next, loc2 = loc2->dw_loc_next)
6483 if (!same_loc_p (loc1, loc2, mark))
6485 return !loc1 && !loc2;
6487 case dw_val_class_die_ref:
6488 return same_die_p (v1->v.val_die_ref.die, v2->v.val_die_ref.die, mark);
6490 case dw_val_class_fde_ref:
6491 case dw_val_class_vms_delta:
6492 case dw_val_class_lbl_id:
6493 case dw_val_class_lineptr:
6494 case dw_val_class_macptr:
6497 case dw_val_class_file:
6498 return v1->v.val_file == v2->v.val_file;
6500 case dw_val_class_data8:
6501 return !memcmp (v1->v.val_data8, v2->v.val_data8, 8);
6508 /* Do the attributes look the same? */
6511 same_attr_p (dw_attr_ref at1, dw_attr_ref at2, int *mark)
6513 if (at1->dw_attr != at2->dw_attr)
6516 /* We don't care that this was compiled with a different compiler
6517 snapshot; if the output is the same, that's what matters. */
6518 if (at1->dw_attr == DW_AT_producer)
6521 return same_dw_val_p (&at1->dw_attr_val, &at2->dw_attr_val, mark);
6524 /* Do the dies look the same? */
6527 same_die_p (dw_die_ref die1, dw_die_ref die2, int *mark)
6533 /* To avoid infinite recursion. */
6535 return die1->die_mark == die2->die_mark;
6536 die1->die_mark = die2->die_mark = ++(*mark);
6538 if (die1->die_tag != die2->die_tag)
6541 if (VEC_length (dw_attr_node, die1->die_attr)
6542 != VEC_length (dw_attr_node, die2->die_attr))
6545 FOR_EACH_VEC_ELT (dw_attr_node, die1->die_attr, ix, a1)
6546 if (!same_attr_p (a1, VEC_index (dw_attr_node, die2->die_attr, ix), mark))
6549 c1 = die1->die_child;
6550 c2 = die2->die_child;
6559 if (!same_die_p (c1, c2, mark))
6563 if (c1 == die1->die_child)
6565 if (c2 == die2->die_child)
6575 /* Do the dies look the same? Wrapper around same_die_p. */
6578 same_die_p_wrap (dw_die_ref die1, dw_die_ref die2)
6581 int ret = same_die_p (die1, die2, &mark);
6583 unmark_all_dies (die1);
6584 unmark_all_dies (die2);
6589 /* The prefix to attach to symbols on DIEs in the current comdat debug
6591 static char *comdat_symbol_id;
6593 /* The index of the current symbol within the current comdat CU. */
6594 static unsigned int comdat_symbol_number;
6596 /* Calculate the MD5 checksum of the compilation unit DIE UNIT_DIE and its
6597 children, and set comdat_symbol_id accordingly. */
6600 compute_section_prefix (dw_die_ref unit_die)
6602 const char *die_name = get_AT_string (unit_die, DW_AT_name);
6603 const char *base = die_name ? lbasename (die_name) : "anonymous";
6604 char *name = XALLOCAVEC (char, strlen (base) + 64);
6607 unsigned char checksum[16];
6610 /* Compute the checksum of the DIE, then append part of it as hex digits to
6611 the name filename of the unit. */
6613 md5_init_ctx (&ctx);
6615 die_checksum (unit_die, &ctx, &mark);
6616 unmark_all_dies (unit_die);
6617 md5_finish_ctx (&ctx, checksum);
6619 sprintf (name, "%s.", base);
6620 clean_symbol_name (name);
6622 p = name + strlen (name);
6623 for (i = 0; i < 4; i++)
6625 sprintf (p, "%.2x", checksum[i]);
6629 comdat_symbol_id = unit_die->die_id.die_symbol = xstrdup (name);
6630 comdat_symbol_number = 0;
6633 /* Returns nonzero if DIE represents a type, in the sense of TYPE_P. */
6636 is_type_die (dw_die_ref die)
6638 switch (die->die_tag)
6640 case DW_TAG_array_type:
6641 case DW_TAG_class_type:
6642 case DW_TAG_interface_type:
6643 case DW_TAG_enumeration_type:
6644 case DW_TAG_pointer_type:
6645 case DW_TAG_reference_type:
6646 case DW_TAG_rvalue_reference_type:
6647 case DW_TAG_string_type:
6648 case DW_TAG_structure_type:
6649 case DW_TAG_subroutine_type:
6650 case DW_TAG_union_type:
6651 case DW_TAG_ptr_to_member_type:
6652 case DW_TAG_set_type:
6653 case DW_TAG_subrange_type:
6654 case DW_TAG_base_type:
6655 case DW_TAG_const_type:
6656 case DW_TAG_file_type:
6657 case DW_TAG_packed_type:
6658 case DW_TAG_volatile_type:
6659 case DW_TAG_typedef:
6666 /* Returns 1 iff C is the sort of DIE that should go into a COMDAT CU.
6667 Basically, we want to choose the bits that are likely to be shared between
6668 compilations (types) and leave out the bits that are specific to individual
6669 compilations (functions). */
6672 is_comdat_die (dw_die_ref c)
6674 /* I think we want to leave base types and __vtbl_ptr_type in the main CU, as
6675 we do for stabs. The advantage is a greater likelihood of sharing between
6676 objects that don't include headers in the same order (and therefore would
6677 put the base types in a different comdat). jason 8/28/00 */
6679 if (c->die_tag == DW_TAG_base_type)
6682 if (c->die_tag == DW_TAG_pointer_type
6683 || c->die_tag == DW_TAG_reference_type
6684 || c->die_tag == DW_TAG_rvalue_reference_type
6685 || c->die_tag == DW_TAG_const_type
6686 || c->die_tag == DW_TAG_volatile_type)
6688 dw_die_ref t = get_AT_ref (c, DW_AT_type);
6690 return t ? is_comdat_die (t) : 0;
6693 return is_type_die (c);
6696 /* Returns 1 iff C is the sort of DIE that might be referred to from another
6697 compilation unit. */
6700 is_symbol_die (dw_die_ref c)
6702 return (is_type_die (c)
6703 || is_declaration_die (c)
6704 || c->die_tag == DW_TAG_namespace
6705 || c->die_tag == DW_TAG_module);
6708 /* Returns true iff C is a compile-unit DIE. */
6711 is_cu_die (dw_die_ref c)
6713 return c && c->die_tag == DW_TAG_compile_unit;
6717 gen_internal_sym (const char *prefix)
6721 ASM_GENERATE_INTERNAL_LABEL (buf, prefix, label_num++);
6722 return xstrdup (buf);
6725 /* Assign symbols to all worthy DIEs under DIE. */
6728 assign_symbol_names (dw_die_ref die)
6732 if (is_symbol_die (die))
6734 if (comdat_symbol_id)
6736 char *p = XALLOCAVEC (char, strlen (comdat_symbol_id) + 64);
6738 sprintf (p, "%s.%s.%x", DIE_LABEL_PREFIX,
6739 comdat_symbol_id, comdat_symbol_number++);
6740 die->die_id.die_symbol = xstrdup (p);
6743 die->die_id.die_symbol = gen_internal_sym ("LDIE");
6746 FOR_EACH_CHILD (die, c, assign_symbol_names (c));
6749 struct cu_hash_table_entry
6752 unsigned min_comdat_num, max_comdat_num;
6753 struct cu_hash_table_entry *next;
6756 /* Routines to manipulate hash table of CUs. */
6758 htab_cu_hash (const void *of)
6760 const struct cu_hash_table_entry *const entry =
6761 (const struct cu_hash_table_entry *) of;
6763 return htab_hash_string (entry->cu->die_id.die_symbol);
6767 htab_cu_eq (const void *of1, const void *of2)
6769 const struct cu_hash_table_entry *const entry1 =
6770 (const struct cu_hash_table_entry *) of1;
6771 const struct die_struct *const entry2 = (const struct die_struct *) of2;
6773 return !strcmp (entry1->cu->die_id.die_symbol, entry2->die_id.die_symbol);
6777 htab_cu_del (void *what)
6779 struct cu_hash_table_entry *next,
6780 *entry = (struct cu_hash_table_entry *) what;
6790 /* Check whether we have already seen this CU and set up SYM_NUM
6793 check_duplicate_cu (dw_die_ref cu, htab_t htable, unsigned int *sym_num)
6795 struct cu_hash_table_entry dummy;
6796 struct cu_hash_table_entry **slot, *entry, *last = &dummy;
6798 dummy.max_comdat_num = 0;
6800 slot = (struct cu_hash_table_entry **)
6801 htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_id.die_symbol),
6805 for (; entry; last = entry, entry = entry->next)
6807 if (same_die_p_wrap (cu, entry->cu))
6813 *sym_num = entry->min_comdat_num;
6817 entry = XCNEW (struct cu_hash_table_entry);
6819 entry->min_comdat_num = *sym_num = last->max_comdat_num;
6820 entry->next = *slot;
6826 /* Record SYM_NUM to record of CU in HTABLE. */
6828 record_comdat_symbol_number (dw_die_ref cu, htab_t htable, unsigned int sym_num)
6830 struct cu_hash_table_entry **slot, *entry;
6832 slot = (struct cu_hash_table_entry **)
6833 htab_find_slot_with_hash (htable, cu, htab_hash_string (cu->die_id.die_symbol),
6837 entry->max_comdat_num = sym_num;
6840 /* Traverse the DIE (which is always comp_unit_die), and set up
6841 additional compilation units for each of the include files we see
6842 bracketed by BINCL/EINCL. */
6845 break_out_includes (dw_die_ref die)
6848 dw_die_ref unit = NULL;
6849 limbo_die_node *node, **pnode;
6850 htab_t cu_hash_table;
6854 dw_die_ref prev = c;
6856 while (c->die_tag == DW_TAG_GNU_BINCL || c->die_tag == DW_TAG_GNU_EINCL
6857 || (unit && is_comdat_die (c)))
6859 dw_die_ref next = c->die_sib;
6861 /* This DIE is for a secondary CU; remove it from the main one. */
6862 remove_child_with_prev (c, prev);
6864 if (c->die_tag == DW_TAG_GNU_BINCL)
6865 unit = push_new_compile_unit (unit, c);
6866 else if (c->die_tag == DW_TAG_GNU_EINCL)
6867 unit = pop_compile_unit (unit);
6869 add_child_die (unit, c);
6871 if (c == die->die_child)
6874 } while (c != die->die_child);
6877 /* We can only use this in debugging, since the frontend doesn't check
6878 to make sure that we leave every include file we enter. */
6882 assign_symbol_names (die);
6883 cu_hash_table = htab_create (10, htab_cu_hash, htab_cu_eq, htab_cu_del);
6884 for (node = limbo_die_list, pnode = &limbo_die_list;
6890 compute_section_prefix (node->die);
6891 is_dupl = check_duplicate_cu (node->die, cu_hash_table,
6892 &comdat_symbol_number);
6893 assign_symbol_names (node->die);
6895 *pnode = node->next;
6898 pnode = &node->next;
6899 record_comdat_symbol_number (node->die, cu_hash_table,
6900 comdat_symbol_number);
6903 htab_delete (cu_hash_table);
6906 /* Return non-zero if this DIE is a declaration. */
6909 is_declaration_die (dw_die_ref die)
6914 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
6915 if (a->dw_attr == DW_AT_declaration)
6921 /* Return non-zero if this DIE is nested inside a subprogram. */
6924 is_nested_in_subprogram (dw_die_ref die)
6926 dw_die_ref decl = get_AT_ref (die, DW_AT_specification);
6930 return local_scope_p (decl);
6933 /* Return non-zero if this DIE contains a defining declaration of a
6937 contains_subprogram_definition (dw_die_ref die)
6941 if (die->die_tag == DW_TAG_subprogram && ! is_declaration_die (die))
6943 FOR_EACH_CHILD (die, c, if (contains_subprogram_definition(c)) return 1);
6947 /* Return non-zero if this is a type DIE that should be moved to a
6948 COMDAT .debug_types section. */
6951 should_move_die_to_comdat (dw_die_ref die)
6953 switch (die->die_tag)
6955 case DW_TAG_class_type:
6956 case DW_TAG_structure_type:
6957 case DW_TAG_enumeration_type:
6958 case DW_TAG_union_type:
6959 /* Don't move declarations, inlined instances, or types nested in a
6961 if (is_declaration_die (die)
6962 || get_AT (die, DW_AT_abstract_origin)
6963 || is_nested_in_subprogram (die))
6965 /* A type definition should never contain a subprogram definition. */
6966 gcc_assert (!contains_subprogram_definition (die));
6968 case DW_TAG_array_type:
6969 case DW_TAG_interface_type:
6970 case DW_TAG_pointer_type:
6971 case DW_TAG_reference_type:
6972 case DW_TAG_rvalue_reference_type:
6973 case DW_TAG_string_type:
6974 case DW_TAG_subroutine_type:
6975 case DW_TAG_ptr_to_member_type:
6976 case DW_TAG_set_type:
6977 case DW_TAG_subrange_type:
6978 case DW_TAG_base_type:
6979 case DW_TAG_const_type:
6980 case DW_TAG_file_type:
6981 case DW_TAG_packed_type:
6982 case DW_TAG_volatile_type:
6983 case DW_TAG_typedef:
6989 /* Make a clone of DIE. */
6992 clone_die (dw_die_ref die)
6998 clone = ggc_alloc_cleared_die_node ();
6999 clone->die_tag = die->die_tag;
7001 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7002 add_dwarf_attr (clone, a);
7007 /* Make a clone of the tree rooted at DIE. */
7010 clone_tree (dw_die_ref die)
7013 dw_die_ref clone = clone_die (die);
7015 FOR_EACH_CHILD (die, c, add_child_die (clone, clone_tree(c)));
7020 /* Make a clone of DIE as a declaration. */
7023 clone_as_declaration (dw_die_ref die)
7030 /* If the DIE is already a declaration, just clone it. */
7031 if (is_declaration_die (die))
7032 return clone_die (die);
7034 /* If the DIE is a specification, just clone its declaration DIE. */
7035 decl = get_AT_ref (die, DW_AT_specification);
7037 return clone_die (decl);
7039 clone = ggc_alloc_cleared_die_node ();
7040 clone->die_tag = die->die_tag;
7042 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7044 /* We don't want to copy over all attributes.
7045 For example we don't want DW_AT_byte_size because otherwise we will no
7046 longer have a declaration and GDB will treat it as a definition. */
7050 case DW_AT_artificial:
7051 case DW_AT_containing_type:
7052 case DW_AT_external:
7055 case DW_AT_virtuality:
7056 case DW_AT_linkage_name:
7057 case DW_AT_MIPS_linkage_name:
7058 add_dwarf_attr (clone, a);
7060 case DW_AT_byte_size:
7066 if (die->die_id.die_type_node)
7067 add_AT_die_ref (clone, DW_AT_signature, die);
7069 add_AT_flag (clone, DW_AT_declaration, 1);
7073 /* Copy the declaration context to the new compile unit DIE. This includes
7074 any surrounding namespace or type declarations. If the DIE has an
7075 AT_specification attribute, it also includes attributes and children
7076 attached to the specification. */
7079 copy_declaration_context (dw_die_ref unit, dw_die_ref die)
7082 dw_die_ref new_decl;
7084 decl = get_AT_ref (die, DW_AT_specification);
7093 /* Copy the type node pointer from the new DIE to the original
7094 declaration DIE so we can forward references later. */
7095 decl->die_id.die_type_node = die->die_id.die_type_node;
7097 remove_AT (die, DW_AT_specification);
7099 FOR_EACH_VEC_ELT (dw_attr_node, decl->die_attr, ix, a)
7101 if (a->dw_attr != DW_AT_name
7102 && a->dw_attr != DW_AT_declaration
7103 && a->dw_attr != DW_AT_external)
7104 add_dwarf_attr (die, a);
7107 FOR_EACH_CHILD (decl, c, add_child_die (die, clone_tree(c)));
7110 if (decl->die_parent != NULL
7111 && decl->die_parent->die_tag != DW_TAG_compile_unit
7112 && decl->die_parent->die_tag != DW_TAG_type_unit)
7114 new_decl = copy_ancestor_tree (unit, decl, NULL);
7115 if (new_decl != NULL)
7117 remove_AT (new_decl, DW_AT_signature);
7118 add_AT_specification (die, new_decl);
7123 /* Generate the skeleton ancestor tree for the given NODE, then clone
7124 the DIE and add the clone into the tree. */
7127 generate_skeleton_ancestor_tree (skeleton_chain_node *node)
7129 if (node->new_die != NULL)
7132 node->new_die = clone_as_declaration (node->old_die);
7134 if (node->parent != NULL)
7136 generate_skeleton_ancestor_tree (node->parent);
7137 add_child_die (node->parent->new_die, node->new_die);
7141 /* Generate a skeleton tree of DIEs containing any declarations that are
7142 found in the original tree. We traverse the tree looking for declaration
7143 DIEs, and construct the skeleton from the bottom up whenever we find one. */
7146 generate_skeleton_bottom_up (skeleton_chain_node *parent)
7148 skeleton_chain_node node;
7151 dw_die_ref prev = NULL;
7152 dw_die_ref next = NULL;
7154 node.parent = parent;
7156 first = c = parent->old_die->die_child;
7160 if (prev == NULL || prev->die_sib == c)
7163 next = (c == first ? NULL : c->die_sib);
7165 node.new_die = NULL;
7166 if (is_declaration_die (c))
7168 /* Clone the existing DIE, move the original to the skeleton
7169 tree (which is in the main CU), and put the clone, with
7170 all the original's children, where the original came from. */
7171 dw_die_ref clone = clone_die (c);
7172 move_all_children (c, clone);
7174 replace_child (c, clone, prev);
7175 generate_skeleton_ancestor_tree (parent);
7176 add_child_die (parent->new_die, c);
7180 generate_skeleton_bottom_up (&node);
7181 } while (next != NULL);
7184 /* Wrapper function for generate_skeleton_bottom_up. */
7187 generate_skeleton (dw_die_ref die)
7189 skeleton_chain_node node;
7192 node.new_die = NULL;
7195 /* If this type definition is nested inside another type,
7196 always leave at least a declaration in its place. */
7197 if (die->die_parent != NULL && is_type_die (die->die_parent))
7198 node.new_die = clone_as_declaration (die);
7200 generate_skeleton_bottom_up (&node);
7201 return node.new_die;
7204 /* Remove the DIE from its parent, possibly replacing it with a cloned
7205 declaration. The original DIE will be moved to a new compile unit
7206 so that existing references to it follow it to the new location. If
7207 any of the original DIE's descendants is a declaration, we need to
7208 replace the original DIE with a skeleton tree and move the
7209 declarations back into the skeleton tree. */
7212 remove_child_or_replace_with_skeleton (dw_die_ref child, dw_die_ref prev)
7214 dw_die_ref skeleton;
7216 skeleton = generate_skeleton (child);
7217 if (skeleton == NULL)
7218 remove_child_with_prev (child, prev);
7221 skeleton->die_id.die_type_node = child->die_id.die_type_node;
7222 replace_child (child, skeleton, prev);
7228 /* Traverse the DIE and set up additional .debug_types sections for each
7229 type worthy of being placed in a COMDAT section. */
7232 break_out_comdat_types (dw_die_ref die)
7236 dw_die_ref prev = NULL;
7237 dw_die_ref next = NULL;
7238 dw_die_ref unit = NULL;
7240 first = c = die->die_child;
7244 if (prev == NULL || prev->die_sib == c)
7247 next = (c == first ? NULL : c->die_sib);
7248 if (should_move_die_to_comdat (c))
7250 dw_die_ref replacement;
7251 comdat_type_node_ref type_node;
7253 /* Create a new type unit DIE as the root for the new tree, and
7254 add it to the list of comdat types. */
7255 unit = new_die (DW_TAG_type_unit, NULL, NULL);
7256 add_AT_unsigned (unit, DW_AT_language,
7257 get_AT_unsigned (comp_unit_die (), DW_AT_language));
7258 type_node = ggc_alloc_cleared_comdat_type_node ();
7259 type_node->root_die = unit;
7260 type_node->next = comdat_type_list;
7261 comdat_type_list = type_node;
7263 /* Generate the type signature. */
7264 generate_type_signature (c, type_node);
7266 /* Copy the declaration context, attributes, and children of the
7267 declaration into the new compile unit DIE. */
7268 copy_declaration_context (unit, c);
7270 /* Remove this DIE from the main CU. */
7271 replacement = remove_child_or_replace_with_skeleton (c, prev);
7273 /* Break out nested types into their own type units. */
7274 break_out_comdat_types (c);
7276 /* Add the DIE to the new compunit. */
7277 add_child_die (unit, c);
7279 if (replacement != NULL)
7282 else if (c->die_tag == DW_TAG_namespace
7283 || c->die_tag == DW_TAG_class_type
7284 || c->die_tag == DW_TAG_structure_type
7285 || c->die_tag == DW_TAG_union_type)
7287 /* Look for nested types that can be broken out. */
7288 break_out_comdat_types (c);
7290 } while (next != NULL);
7293 /* Structure to map a DIE in one CU to its copy in a comdat type unit. */
7295 struct decl_table_entry
7301 /* Routines to manipulate hash table of copied declarations. */
7304 htab_decl_hash (const void *of)
7306 const struct decl_table_entry *const entry =
7307 (const struct decl_table_entry *) of;
7309 return htab_hash_pointer (entry->orig);
7313 htab_decl_eq (const void *of1, const void *of2)
7315 const struct decl_table_entry *const entry1 =
7316 (const struct decl_table_entry *) of1;
7317 const struct die_struct *const entry2 = (const struct die_struct *) of2;
7319 return entry1->orig == entry2;
7323 htab_decl_del (void *what)
7325 struct decl_table_entry *entry = (struct decl_table_entry *) what;
7330 /* Copy DIE and its ancestors, up to, but not including, the compile unit
7331 or type unit entry, to a new tree. Adds the new tree to UNIT and returns
7332 a pointer to the copy of DIE. If DECL_TABLE is provided, it is used
7333 to check if the ancestor has already been copied into UNIT. */
7336 copy_ancestor_tree (dw_die_ref unit, dw_die_ref die, htab_t decl_table)
7338 dw_die_ref parent = die->die_parent;
7339 dw_die_ref new_parent = unit;
7342 struct decl_table_entry *entry = NULL;
7346 /* Check if the entry has already been copied to UNIT. */
7347 slot = htab_find_slot_with_hash (decl_table, die,
7348 htab_hash_pointer (die), INSERT);
7349 if (*slot != HTAB_EMPTY_ENTRY)
7351 entry = (struct decl_table_entry *) *slot;
7355 /* Record in DECL_TABLE that DIE has been copied to UNIT. */
7356 entry = XCNEW (struct decl_table_entry);
7364 dw_die_ref spec = get_AT_ref (parent, DW_AT_specification);
7367 if (parent->die_tag != DW_TAG_compile_unit
7368 && parent->die_tag != DW_TAG_type_unit)
7369 new_parent = copy_ancestor_tree (unit, parent, decl_table);
7372 copy = clone_as_declaration (die);
7373 add_child_die (new_parent, copy);
7375 if (decl_table != NULL)
7377 /* Record the pointer to the copy. */
7384 /* Walk the DIE and its children, looking for references to incomplete
7385 or trivial types that are unmarked (i.e., that are not in the current
7389 copy_decls_walk (dw_die_ref unit, dw_die_ref die, htab_t decl_table)
7395 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7397 if (AT_class (a) == dw_val_class_die_ref)
7399 dw_die_ref targ = AT_ref (a);
7400 comdat_type_node_ref type_node = targ->die_id.die_type_node;
7402 struct decl_table_entry *entry;
7404 if (targ->die_mark != 0 || type_node != NULL)
7407 slot = htab_find_slot_with_hash (decl_table, targ,
7408 htab_hash_pointer (targ), INSERT);
7410 if (*slot != HTAB_EMPTY_ENTRY)
7412 /* TARG has already been copied, so we just need to
7413 modify the reference to point to the copy. */
7414 entry = (struct decl_table_entry *) *slot;
7415 a->dw_attr_val.v.val_die_ref.die = entry->copy;
7419 dw_die_ref parent = unit;
7420 dw_die_ref copy = clone_tree (targ);
7422 /* Make sure the cloned tree is marked as part of the
7426 /* Record in DECL_TABLE that TARG has been copied.
7427 Need to do this now, before the recursive call,
7428 because DECL_TABLE may be expanded and SLOT
7429 would no longer be a valid pointer. */
7430 entry = XCNEW (struct decl_table_entry);
7435 /* If TARG has surrounding context, copy its ancestor tree
7436 into the new type unit. */
7437 if (targ->die_parent != NULL
7438 && targ->die_parent->die_tag != DW_TAG_compile_unit
7439 && targ->die_parent->die_tag != DW_TAG_type_unit)
7440 parent = copy_ancestor_tree (unit, targ->die_parent,
7443 add_child_die (parent, copy);
7444 a->dw_attr_val.v.val_die_ref.die = copy;
7446 /* Make sure the newly-copied DIE is walked. If it was
7447 installed in a previously-added context, it won't
7448 get visited otherwise. */
7451 /* Find the highest point of the newly-added tree,
7452 mark each node along the way, and walk from there. */
7453 parent->die_mark = 1;
7454 while (parent->die_parent
7455 && parent->die_parent->die_mark == 0)
7457 parent = parent->die_parent;
7458 parent->die_mark = 1;
7460 copy_decls_walk (unit, parent, decl_table);
7466 FOR_EACH_CHILD (die, c, copy_decls_walk (unit, c, decl_table));
7469 /* Copy declarations for "unworthy" types into the new comdat section.
7470 Incomplete types, modified types, and certain other types aren't broken
7471 out into comdat sections of their own, so they don't have a signature,
7472 and we need to copy the declaration into the same section so that we
7473 don't have an external reference. */
7476 copy_decls_for_unworthy_types (dw_die_ref unit)
7481 decl_table = htab_create (10, htab_decl_hash, htab_decl_eq, htab_decl_del);
7482 copy_decls_walk (unit, unit, decl_table);
7483 htab_delete (decl_table);
7487 /* Traverse the DIE and add a sibling attribute if it may have the
7488 effect of speeding up access to siblings. To save some space,
7489 avoid generating sibling attributes for DIE's without children. */
7492 add_sibling_attributes (dw_die_ref die)
7496 if (! die->die_child)
7499 if (die->die_parent && die != die->die_parent->die_child)
7500 add_AT_die_ref (die, DW_AT_sibling, die->die_sib);
7502 FOR_EACH_CHILD (die, c, add_sibling_attributes (c));
7505 /* Output all location lists for the DIE and its children. */
7508 output_location_lists (dw_die_ref die)
7514 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7515 if (AT_class (a) == dw_val_class_loc_list)
7516 output_loc_list (AT_loc_list (a));
7518 FOR_EACH_CHILD (die, c, output_location_lists (c));
7521 /* The format of each DIE (and its attribute value pairs) is encoded in an
7522 abbreviation table. This routine builds the abbreviation table and assigns
7523 a unique abbreviation id for each abbreviation entry. The children of each
7524 die are visited recursively. */
7527 build_abbrev_table (dw_die_ref die)
7529 unsigned long abbrev_id;
7530 unsigned int n_alloc;
7535 /* Scan the DIE references, and mark as external any that refer to
7536 DIEs from other CUs (i.e. those which are not marked). */
7537 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7538 if (AT_class (a) == dw_val_class_die_ref
7539 && AT_ref (a)->die_mark == 0)
7541 gcc_assert (use_debug_types || AT_ref (a)->die_id.die_symbol);
7542 set_AT_ref_external (a, 1);
7545 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
7547 dw_die_ref abbrev = abbrev_die_table[abbrev_id];
7548 dw_attr_ref die_a, abbrev_a;
7552 if (abbrev->die_tag != die->die_tag)
7554 if ((abbrev->die_child != NULL) != (die->die_child != NULL))
7557 if (VEC_length (dw_attr_node, abbrev->die_attr)
7558 != VEC_length (dw_attr_node, die->die_attr))
7561 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, die_a)
7563 abbrev_a = VEC_index (dw_attr_node, abbrev->die_attr, ix);
7564 if ((abbrev_a->dw_attr != die_a->dw_attr)
7565 || (value_format (abbrev_a) != value_format (die_a)))
7575 if (abbrev_id >= abbrev_die_table_in_use)
7577 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
7579 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
7580 abbrev_die_table = GGC_RESIZEVEC (dw_die_ref, abbrev_die_table,
7583 memset (&abbrev_die_table[abbrev_die_table_allocated], 0,
7584 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
7585 abbrev_die_table_allocated = n_alloc;
7588 ++abbrev_die_table_in_use;
7589 abbrev_die_table[abbrev_id] = die;
7592 die->die_abbrev = abbrev_id;
7593 FOR_EACH_CHILD (die, c, build_abbrev_table (c));
7596 /* Return the power-of-two number of bytes necessary to represent VALUE. */
7599 constant_size (unsigned HOST_WIDE_INT value)
7606 log = floor_log2 (value);
7609 log = 1 << (floor_log2 (log) + 1);
7614 /* Return the size of a DIE as it is represented in the
7615 .debug_info section. */
7617 static unsigned long
7618 size_of_die (dw_die_ref die)
7620 unsigned long size = 0;
7624 size += size_of_uleb128 (die->die_abbrev);
7625 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7627 switch (AT_class (a))
7629 case dw_val_class_addr:
7630 size += DWARF2_ADDR_SIZE;
7632 case dw_val_class_offset:
7633 size += DWARF_OFFSET_SIZE;
7635 case dw_val_class_loc:
7637 unsigned long lsize = size_of_locs (AT_loc (a));
7640 if (dwarf_version >= 4)
7641 size += size_of_uleb128 (lsize);
7643 size += constant_size (lsize);
7647 case dw_val_class_loc_list:
7648 size += DWARF_OFFSET_SIZE;
7650 case dw_val_class_range_list:
7651 size += DWARF_OFFSET_SIZE;
7653 case dw_val_class_const:
7654 size += size_of_sleb128 (AT_int (a));
7656 case dw_val_class_unsigned_const:
7658 int csize = constant_size (AT_unsigned (a));
7659 if (dwarf_version == 3
7660 && a->dw_attr == DW_AT_data_member_location
7662 size += size_of_uleb128 (AT_unsigned (a));
7667 case dw_val_class_const_double:
7668 size += 2 * HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR;
7669 if (HOST_BITS_PER_WIDE_INT >= 64)
7672 case dw_val_class_vec:
7673 size += constant_size (a->dw_attr_val.v.val_vec.length
7674 * a->dw_attr_val.v.val_vec.elt_size)
7675 + a->dw_attr_val.v.val_vec.length
7676 * a->dw_attr_val.v.val_vec.elt_size; /* block */
7678 case dw_val_class_flag:
7679 if (dwarf_version >= 4)
7680 /* Currently all add_AT_flag calls pass in 1 as last argument,
7681 so DW_FORM_flag_present can be used. If that ever changes,
7682 we'll need to use DW_FORM_flag and have some optimization
7683 in build_abbrev_table that will change those to
7684 DW_FORM_flag_present if it is set to 1 in all DIEs using
7685 the same abbrev entry. */
7686 gcc_assert (a->dw_attr_val.v.val_flag == 1);
7690 case dw_val_class_die_ref:
7691 if (AT_ref_external (a))
7693 /* In DWARF4, we use DW_FORM_ref_sig8; for earlier versions
7694 we use DW_FORM_ref_addr. In DWARF2, DW_FORM_ref_addr
7695 is sized by target address length, whereas in DWARF3
7696 it's always sized as an offset. */
7697 if (use_debug_types)
7698 size += DWARF_TYPE_SIGNATURE_SIZE;
7699 else if (dwarf_version == 2)
7700 size += DWARF2_ADDR_SIZE;
7702 size += DWARF_OFFSET_SIZE;
7705 size += DWARF_OFFSET_SIZE;
7707 case dw_val_class_fde_ref:
7708 size += DWARF_OFFSET_SIZE;
7710 case dw_val_class_lbl_id:
7711 size += DWARF2_ADDR_SIZE;
7713 case dw_val_class_lineptr:
7714 case dw_val_class_macptr:
7715 size += DWARF_OFFSET_SIZE;
7717 case dw_val_class_str:
7718 if (AT_string_form (a) == DW_FORM_strp)
7719 size += DWARF_OFFSET_SIZE;
7721 size += strlen (a->dw_attr_val.v.val_str->str) + 1;
7723 case dw_val_class_file:
7724 size += constant_size (maybe_emit_file (a->dw_attr_val.v.val_file));
7726 case dw_val_class_data8:
7729 case dw_val_class_vms_delta:
7730 size += DWARF_OFFSET_SIZE;
7740 /* Size the debugging information associated with a given DIE. Visits the
7741 DIE's children recursively. Updates the global variable next_die_offset, on
7742 each time through. Uses the current value of next_die_offset to update the
7743 die_offset field in each DIE. */
7746 calc_die_sizes (dw_die_ref die)
7750 gcc_assert (die->die_offset == 0
7751 || (unsigned long int) die->die_offset == next_die_offset);
7752 die->die_offset = next_die_offset;
7753 next_die_offset += size_of_die (die);
7755 FOR_EACH_CHILD (die, c, calc_die_sizes (c));
7757 if (die->die_child != NULL)
7758 /* Count the null byte used to terminate sibling lists. */
7759 next_die_offset += 1;
7762 /* Size just the base type children at the start of the CU.
7763 This is needed because build_abbrev needs to size locs
7764 and sizing of type based stack ops needs to know die_offset
7765 values for the base types. */
7768 calc_base_type_die_sizes (void)
7770 unsigned long die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
7772 dw_die_ref base_type;
7773 #if ENABLE_ASSERT_CHECKING
7774 dw_die_ref prev = comp_unit_die ()->die_child;
7777 die_offset += size_of_die (comp_unit_die ());
7778 for (i = 0; VEC_iterate (dw_die_ref, base_types, i, base_type); i++)
7780 #if ENABLE_ASSERT_CHECKING
7781 gcc_assert (base_type->die_offset == 0
7782 && prev->die_sib == base_type
7783 && base_type->die_child == NULL
7784 && base_type->die_abbrev);
7787 base_type->die_offset = die_offset;
7788 die_offset += size_of_die (base_type);
7792 /* Set the marks for a die and its children. We do this so
7793 that we know whether or not a reference needs to use FORM_ref_addr; only
7794 DIEs in the same CU will be marked. We used to clear out the offset
7795 and use that as the flag, but ran into ordering problems. */
7798 mark_dies (dw_die_ref die)
7802 gcc_assert (!die->die_mark);
7805 FOR_EACH_CHILD (die, c, mark_dies (c));
7808 /* Clear the marks for a die and its children. */
7811 unmark_dies (dw_die_ref die)
7815 if (! use_debug_types)
7816 gcc_assert (die->die_mark);
7819 FOR_EACH_CHILD (die, c, unmark_dies (c));
7822 /* Clear the marks for a die, its children and referred dies. */
7825 unmark_all_dies (dw_die_ref die)
7835 FOR_EACH_CHILD (die, c, unmark_all_dies (c));
7837 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
7838 if (AT_class (a) == dw_val_class_die_ref)
7839 unmark_all_dies (AT_ref (a));
7842 /* Return the size of the .debug_pubnames or .debug_pubtypes table
7843 generated for the compilation unit. */
7845 static unsigned long
7846 size_of_pubnames (VEC (pubname_entry, gc) * names)
7852 size = DWARF_PUBNAMES_HEADER_SIZE;
7853 FOR_EACH_VEC_ELT (pubname_entry, names, i, p)
7854 if (names != pubtype_table
7855 || p->die->die_offset != 0
7856 || !flag_eliminate_unused_debug_types)
7857 size += strlen (p->name) + DWARF_OFFSET_SIZE + 1;
7859 size += DWARF_OFFSET_SIZE;
7863 /* Return the size of the information in the .debug_aranges section. */
7865 static unsigned long
7866 size_of_aranges (void)
7870 size = DWARF_ARANGES_HEADER_SIZE;
7872 /* Count the address/length pair for this compilation unit. */
7873 if (text_section_used)
7874 size += 2 * DWARF2_ADDR_SIZE;
7875 if (cold_text_section_used)
7876 size += 2 * DWARF2_ADDR_SIZE;
7877 if (have_multiple_function_sections)
7882 FOR_EACH_VEC_ELT (dw_fde_ref, fde_vec, fde_idx, fde)
7884 if (!fde->in_std_section)
7885 size += 2 * DWARF2_ADDR_SIZE;
7886 if (fde->dw_fde_second_begin && !fde->second_in_std_section)
7887 size += 2 * DWARF2_ADDR_SIZE;
7891 /* Count the two zero words used to terminated the address range table. */
7892 size += 2 * DWARF2_ADDR_SIZE;
7896 /* Select the encoding of an attribute value. */
7898 static enum dwarf_form
7899 value_format (dw_attr_ref a)
7901 switch (a->dw_attr_val.val_class)
7903 case dw_val_class_addr:
7904 /* Only very few attributes allow DW_FORM_addr. */
7909 case DW_AT_entry_pc:
7910 case DW_AT_trampoline:
7911 return DW_FORM_addr;
7915 switch (DWARF2_ADDR_SIZE)
7918 return DW_FORM_data1;
7920 return DW_FORM_data2;
7922 return DW_FORM_data4;
7924 return DW_FORM_data8;
7928 case dw_val_class_range_list:
7929 case dw_val_class_loc_list:
7930 if (dwarf_version >= 4)
7931 return DW_FORM_sec_offset;
7933 case dw_val_class_vms_delta:
7934 case dw_val_class_offset:
7935 switch (DWARF_OFFSET_SIZE)
7938 return DW_FORM_data4;
7940 return DW_FORM_data8;
7944 case dw_val_class_loc:
7945 if (dwarf_version >= 4)
7946 return DW_FORM_exprloc;
7947 switch (constant_size (size_of_locs (AT_loc (a))))
7950 return DW_FORM_block1;
7952 return DW_FORM_block2;
7956 case dw_val_class_const:
7957 return DW_FORM_sdata;
7958 case dw_val_class_unsigned_const:
7959 switch (constant_size (AT_unsigned (a)))
7962 return DW_FORM_data1;
7964 return DW_FORM_data2;
7966 /* In DWARF3 DW_AT_data_member_location with
7967 DW_FORM_data4 or DW_FORM_data8 is a loclistptr, not
7968 constant, so we need to use DW_FORM_udata if we need
7969 a large constant. */
7970 if (dwarf_version == 3 && a->dw_attr == DW_AT_data_member_location)
7971 return DW_FORM_udata;
7972 return DW_FORM_data4;
7974 if (dwarf_version == 3 && a->dw_attr == DW_AT_data_member_location)
7975 return DW_FORM_udata;
7976 return DW_FORM_data8;
7980 case dw_val_class_const_double:
7981 switch (HOST_BITS_PER_WIDE_INT)
7984 return DW_FORM_data2;
7986 return DW_FORM_data4;
7988 return DW_FORM_data8;
7991 return DW_FORM_block1;
7993 case dw_val_class_vec:
7994 switch (constant_size (a->dw_attr_val.v.val_vec.length
7995 * a->dw_attr_val.v.val_vec.elt_size))
7998 return DW_FORM_block1;
8000 return DW_FORM_block2;
8002 return DW_FORM_block4;
8006 case dw_val_class_flag:
8007 if (dwarf_version >= 4)
8009 /* Currently all add_AT_flag calls pass in 1 as last argument,
8010 so DW_FORM_flag_present can be used. If that ever changes,
8011 we'll need to use DW_FORM_flag and have some optimization
8012 in build_abbrev_table that will change those to
8013 DW_FORM_flag_present if it is set to 1 in all DIEs using
8014 the same abbrev entry. */
8015 gcc_assert (a->dw_attr_val.v.val_flag == 1);
8016 return DW_FORM_flag_present;
8018 return DW_FORM_flag;
8019 case dw_val_class_die_ref:
8020 if (AT_ref_external (a))
8021 return use_debug_types ? DW_FORM_ref_sig8 : DW_FORM_ref_addr;
8024 case dw_val_class_fde_ref:
8025 return DW_FORM_data;
8026 case dw_val_class_lbl_id:
8027 return DW_FORM_addr;
8028 case dw_val_class_lineptr:
8029 case dw_val_class_macptr:
8030 return dwarf_version >= 4 ? DW_FORM_sec_offset : DW_FORM_data;
8031 case dw_val_class_str:
8032 return AT_string_form (a);
8033 case dw_val_class_file:
8034 switch (constant_size (maybe_emit_file (a->dw_attr_val.v.val_file)))
8037 return DW_FORM_data1;
8039 return DW_FORM_data2;
8041 return DW_FORM_data4;
8046 case dw_val_class_data8:
8047 return DW_FORM_data8;
8054 /* Output the encoding of an attribute value. */
8057 output_value_format (dw_attr_ref a)
8059 enum dwarf_form form = value_format (a);
8061 dw2_asm_output_data_uleb128 (form, "(%s)", dwarf_form_name (form));
8064 /* Output the .debug_abbrev section which defines the DIE abbreviation
8068 output_abbrev_section (void)
8070 unsigned long abbrev_id;
8072 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
8074 dw_die_ref abbrev = abbrev_die_table[abbrev_id];
8078 dw2_asm_output_data_uleb128 (abbrev_id, "(abbrev code)");
8079 dw2_asm_output_data_uleb128 (abbrev->die_tag, "(TAG: %s)",
8080 dwarf_tag_name (abbrev->die_tag));
8082 if (abbrev->die_child != NULL)
8083 dw2_asm_output_data (1, DW_children_yes, "DW_children_yes");
8085 dw2_asm_output_data (1, DW_children_no, "DW_children_no");
8087 for (ix = 0; VEC_iterate (dw_attr_node, abbrev->die_attr, ix, a_attr);
8090 dw2_asm_output_data_uleb128 (a_attr->dw_attr, "(%s)",
8091 dwarf_attr_name (a_attr->dw_attr));
8092 output_value_format (a_attr);
8095 dw2_asm_output_data (1, 0, NULL);
8096 dw2_asm_output_data (1, 0, NULL);
8099 /* Terminate the table. */
8100 dw2_asm_output_data (1, 0, NULL);
8103 /* Output a symbol we can use to refer to this DIE from another CU. */
8106 output_die_symbol (dw_die_ref die)
8108 char *sym = die->die_id.die_symbol;
8113 if (strncmp (sym, DIE_LABEL_PREFIX, sizeof (DIE_LABEL_PREFIX) - 1) == 0)
8114 /* We make these global, not weak; if the target doesn't support
8115 .linkonce, it doesn't support combining the sections, so debugging
8117 targetm.asm_out.globalize_label (asm_out_file, sym);
8119 ASM_OUTPUT_LABEL (asm_out_file, sym);
8122 /* Return a new location list, given the begin and end range, and the
8125 static inline dw_loc_list_ref
8126 new_loc_list (dw_loc_descr_ref expr, const char *begin, const char *end,
8127 const char *section)
8129 dw_loc_list_ref retlist = ggc_alloc_cleared_dw_loc_list_node ();
8131 retlist->begin = begin;
8133 retlist->expr = expr;
8134 retlist->section = section;
8139 /* Generate a new internal symbol for this location list node, if it
8140 hasn't got one yet. */
8143 gen_llsym (dw_loc_list_ref list)
8145 gcc_assert (!list->ll_symbol);
8146 list->ll_symbol = gen_internal_sym ("LLST");
8149 /* Output the location list given to us. */
8152 output_loc_list (dw_loc_list_ref list_head)
8154 dw_loc_list_ref curr = list_head;
8156 if (list_head->emitted)
8158 list_head->emitted = true;
8160 ASM_OUTPUT_LABEL (asm_out_file, list_head->ll_symbol);
8162 /* Walk the location list, and output each range + expression. */
8163 for (curr = list_head; curr != NULL; curr = curr->dw_loc_next)
8166 /* Don't output an entry that starts and ends at the same address. */
8167 if (strcmp (curr->begin, curr->end) == 0 && !curr->force)
8169 if (!have_multiple_function_sections)
8171 dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->begin, curr->section,
8172 "Location list begin address (%s)",
8173 list_head->ll_symbol);
8174 dw2_asm_output_delta (DWARF2_ADDR_SIZE, curr->end, curr->section,
8175 "Location list end address (%s)",
8176 list_head->ll_symbol);
8180 dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->begin,
8181 "Location list begin address (%s)",
8182 list_head->ll_symbol);
8183 dw2_asm_output_addr (DWARF2_ADDR_SIZE, curr->end,
8184 "Location list end address (%s)",
8185 list_head->ll_symbol);
8187 size = size_of_locs (curr->expr);
8189 /* Output the block length for this list of location operations. */
8190 gcc_assert (size <= 0xffff);
8191 dw2_asm_output_data (2, size, "%s", "Location expression size");
8193 output_loc_sequence (curr->expr, -1);
8196 dw2_asm_output_data (DWARF2_ADDR_SIZE, 0,
8197 "Location list terminator begin (%s)",
8198 list_head->ll_symbol);
8199 dw2_asm_output_data (DWARF2_ADDR_SIZE, 0,
8200 "Location list terminator end (%s)",
8201 list_head->ll_symbol);
8204 /* Output a type signature. */
8207 output_signature (const char *sig, const char *name)
8211 for (i = 0; i < DWARF_TYPE_SIGNATURE_SIZE; i++)
8212 dw2_asm_output_data (1, sig[i], i == 0 ? "%s" : NULL, name);
8215 /* Output the DIE and its attributes. Called recursively to generate
8216 the definitions of each child DIE. */
8219 output_die (dw_die_ref die)
8226 /* If someone in another CU might refer to us, set up a symbol for
8227 them to point to. */
8228 if (! use_debug_types && die->die_id.die_symbol)
8229 output_die_symbol (die);
8231 dw2_asm_output_data_uleb128 (die->die_abbrev, "(DIE (%#lx) %s)",
8232 (unsigned long)die->die_offset,
8233 dwarf_tag_name (die->die_tag));
8235 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
8237 const char *name = dwarf_attr_name (a->dw_attr);
8239 switch (AT_class (a))
8241 case dw_val_class_addr:
8242 dw2_asm_output_addr_rtx (DWARF2_ADDR_SIZE, AT_addr (a), "%s", name);
8245 case dw_val_class_offset:
8246 dw2_asm_output_data (DWARF_OFFSET_SIZE, a->dw_attr_val.v.val_offset,
8250 case dw_val_class_range_list:
8252 char *p = strchr (ranges_section_label, '\0');
8254 sprintf (p, "+" HOST_WIDE_INT_PRINT_HEX,
8255 a->dw_attr_val.v.val_offset);
8256 dw2_asm_output_offset (DWARF_OFFSET_SIZE, ranges_section_label,
8257 debug_ranges_section, "%s", name);
8262 case dw_val_class_loc:
8263 size = size_of_locs (AT_loc (a));
8265 /* Output the block length for this list of location operations. */
8266 if (dwarf_version >= 4)
8267 dw2_asm_output_data_uleb128 (size, "%s", name);
8269 dw2_asm_output_data (constant_size (size), size, "%s", name);
8271 output_loc_sequence (AT_loc (a), -1);
8274 case dw_val_class_const:
8275 /* ??? It would be slightly more efficient to use a scheme like is
8276 used for unsigned constants below, but gdb 4.x does not sign
8277 extend. Gdb 5.x does sign extend. */
8278 dw2_asm_output_data_sleb128 (AT_int (a), "%s", name);
8281 case dw_val_class_unsigned_const:
8283 int csize = constant_size (AT_unsigned (a));
8284 if (dwarf_version == 3
8285 && a->dw_attr == DW_AT_data_member_location
8287 dw2_asm_output_data_uleb128 (AT_unsigned (a), "%s", name);
8289 dw2_asm_output_data (csize, AT_unsigned (a), "%s", name);
8293 case dw_val_class_const_double:
8295 unsigned HOST_WIDE_INT first, second;
8297 if (HOST_BITS_PER_WIDE_INT >= 64)
8298 dw2_asm_output_data (1,
8299 2 * HOST_BITS_PER_WIDE_INT
8300 / HOST_BITS_PER_CHAR,
8303 if (WORDS_BIG_ENDIAN)
8305 first = a->dw_attr_val.v.val_double.high;
8306 second = a->dw_attr_val.v.val_double.low;
8310 first = a->dw_attr_val.v.val_double.low;
8311 second = a->dw_attr_val.v.val_double.high;
8314 dw2_asm_output_data (HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR,
8316 dw2_asm_output_data (HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR,
8321 case dw_val_class_vec:
8323 unsigned int elt_size = a->dw_attr_val.v.val_vec.elt_size;
8324 unsigned int len = a->dw_attr_val.v.val_vec.length;
8328 dw2_asm_output_data (constant_size (len * elt_size),
8329 len * elt_size, "%s", name);
8330 if (elt_size > sizeof (HOST_WIDE_INT))
8335 for (i = 0, p = a->dw_attr_val.v.val_vec.array;
8338 dw2_asm_output_data (elt_size, extract_int (p, elt_size),
8339 "fp or vector constant word %u", i);
8343 case dw_val_class_flag:
8344 if (dwarf_version >= 4)
8346 /* Currently all add_AT_flag calls pass in 1 as last argument,
8347 so DW_FORM_flag_present can be used. If that ever changes,
8348 we'll need to use DW_FORM_flag and have some optimization
8349 in build_abbrev_table that will change those to
8350 DW_FORM_flag_present if it is set to 1 in all DIEs using
8351 the same abbrev entry. */
8352 gcc_assert (AT_flag (a) == 1);
8354 fprintf (asm_out_file, "\t\t\t%s %s\n",
8355 ASM_COMMENT_START, name);
8358 dw2_asm_output_data (1, AT_flag (a), "%s", name);
8361 case dw_val_class_loc_list:
8363 char *sym = AT_loc_list (a)->ll_symbol;
8366 dw2_asm_output_offset (DWARF_OFFSET_SIZE, sym, debug_loc_section,
8371 case dw_val_class_die_ref:
8372 if (AT_ref_external (a))
8374 if (use_debug_types)
8376 comdat_type_node_ref type_node =
8377 AT_ref (a)->die_id.die_type_node;
8379 gcc_assert (type_node);
8380 output_signature (type_node->signature, name);
8384 char *sym = AT_ref (a)->die_id.die_symbol;
8388 /* In DWARF2, DW_FORM_ref_addr is sized by target address
8389 length, whereas in DWARF3 it's always sized as an
8391 if (dwarf_version == 2)
8392 size = DWARF2_ADDR_SIZE;
8394 size = DWARF_OFFSET_SIZE;
8395 dw2_asm_output_offset (size, sym, debug_info_section, "%s",
8401 gcc_assert (AT_ref (a)->die_offset);
8402 dw2_asm_output_data (DWARF_OFFSET_SIZE, AT_ref (a)->die_offset,
8407 case dw_val_class_fde_ref:
8411 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_LABEL,
8412 a->dw_attr_val.v.val_fde_index * 2);
8413 dw2_asm_output_offset (DWARF_OFFSET_SIZE, l1, debug_frame_section,
8418 case dw_val_class_vms_delta:
8419 dw2_asm_output_vms_delta (DWARF_OFFSET_SIZE,
8420 AT_vms_delta2 (a), AT_vms_delta1 (a),
8424 case dw_val_class_lbl_id:
8425 dw2_asm_output_addr (DWARF2_ADDR_SIZE, AT_lbl (a), "%s", name);
8428 case dw_val_class_lineptr:
8429 dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a),
8430 debug_line_section, "%s", name);
8433 case dw_val_class_macptr:
8434 dw2_asm_output_offset (DWARF_OFFSET_SIZE, AT_lbl (a),
8435 debug_macinfo_section, "%s", name);
8438 case dw_val_class_str:
8439 if (AT_string_form (a) == DW_FORM_strp)
8440 dw2_asm_output_offset (DWARF_OFFSET_SIZE,
8441 a->dw_attr_val.v.val_str->label,
8443 "%s: \"%s\"", name, AT_string (a));
8445 dw2_asm_output_nstring (AT_string (a), -1, "%s", name);
8448 case dw_val_class_file:
8450 int f = maybe_emit_file (a->dw_attr_val.v.val_file);
8452 dw2_asm_output_data (constant_size (f), f, "%s (%s)", name,
8453 a->dw_attr_val.v.val_file->filename);
8457 case dw_val_class_data8:
8461 for (i = 0; i < 8; i++)
8462 dw2_asm_output_data (1, a->dw_attr_val.v.val_data8[i],
8463 i == 0 ? "%s" : NULL, name);
8472 FOR_EACH_CHILD (die, c, output_die (c));
8474 /* Add null byte to terminate sibling list. */
8475 if (die->die_child != NULL)
8476 dw2_asm_output_data (1, 0, "end of children of DIE %#lx",
8477 (unsigned long) die->die_offset);
8480 /* Output the compilation unit that appears at the beginning of the
8481 .debug_info section, and precedes the DIE descriptions. */
8484 output_compilation_unit_header (void)
8486 int ver = dwarf_version;
8488 if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4)
8489 dw2_asm_output_data (4, 0xffffffff,
8490 "Initial length escape value indicating 64-bit DWARF extension");
8491 dw2_asm_output_data (DWARF_OFFSET_SIZE,
8492 next_die_offset - DWARF_INITIAL_LENGTH_SIZE,
8493 "Length of Compilation Unit Info");
8494 dw2_asm_output_data (2, ver, "DWARF version number");
8495 dw2_asm_output_offset (DWARF_OFFSET_SIZE, abbrev_section_label,
8496 debug_abbrev_section,
8497 "Offset Into Abbrev. Section");
8498 dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Pointer Size (in bytes)");
8501 /* Output the compilation unit DIE and its children. */
8504 output_comp_unit (dw_die_ref die, int output_if_empty)
8506 const char *secname;
8509 /* Unless we are outputting main CU, we may throw away empty ones. */
8510 if (!output_if_empty && die->die_child == NULL)
8513 /* Even if there are no children of this DIE, we must output the information
8514 about the compilation unit. Otherwise, on an empty translation unit, we
8515 will generate a present, but empty, .debug_info section. IRIX 6.5 `nm'
8516 will then complain when examining the file. First mark all the DIEs in
8517 this CU so we know which get local refs. */
8520 build_abbrev_table (die);
8522 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
8523 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
8524 calc_die_sizes (die);
8526 oldsym = die->die_id.die_symbol;
8529 tmp = XALLOCAVEC (char, strlen (oldsym) + 24);
8531 sprintf (tmp, ".gnu.linkonce.wi.%s", oldsym);
8533 die->die_id.die_symbol = NULL;
8534 switch_to_section (get_section (secname, SECTION_DEBUG, NULL));
8538 switch_to_section (debug_info_section);
8539 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
8540 info_section_emitted = true;
8543 /* Output debugging information. */
8544 output_compilation_unit_header ();
8547 /* Leave the marks on the main CU, so we can check them in
8552 die->die_id.die_symbol = oldsym;
8556 /* Output a comdat type unit DIE and its children. */
8559 output_comdat_type_unit (comdat_type_node *node)
8561 const char *secname;
8564 #if defined (OBJECT_FORMAT_ELF)
8568 /* First mark all the DIEs in this CU so we know which get local refs. */
8569 mark_dies (node->root_die);
8571 build_abbrev_table (node->root_die);
8573 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
8574 next_die_offset = DWARF_COMDAT_TYPE_UNIT_HEADER_SIZE;
8575 calc_die_sizes (node->root_die);
8577 #if defined (OBJECT_FORMAT_ELF)
8578 secname = ".debug_types";
8579 tmp = XALLOCAVEC (char, 4 + DWARF_TYPE_SIGNATURE_SIZE * 2);
8580 sprintf (tmp, "wt.");
8581 for (i = 0; i < DWARF_TYPE_SIGNATURE_SIZE; i++)
8582 sprintf (tmp + 3 + i * 2, "%02x", node->signature[i] & 0xff);
8583 comdat_key = get_identifier (tmp);
8584 targetm.asm_out.named_section (secname,
8585 SECTION_DEBUG | SECTION_LINKONCE,
8588 tmp = XALLOCAVEC (char, 18 + DWARF_TYPE_SIGNATURE_SIZE * 2);
8589 sprintf (tmp, ".gnu.linkonce.wt.");
8590 for (i = 0; i < DWARF_TYPE_SIGNATURE_SIZE; i++)
8591 sprintf (tmp + 17 + i * 2, "%02x", node->signature[i] & 0xff);
8593 switch_to_section (get_section (secname, SECTION_DEBUG, NULL));
8596 /* Output debugging information. */
8597 output_compilation_unit_header ();
8598 output_signature (node->signature, "Type Signature");
8599 dw2_asm_output_data (DWARF_OFFSET_SIZE, node->type_die->die_offset,
8600 "Offset to Type DIE");
8601 output_die (node->root_die);
8603 unmark_dies (node->root_die);
8606 /* Return the DWARF2/3 pubname associated with a decl. */
8609 dwarf2_name (tree decl, int scope)
8611 if (DECL_NAMELESS (decl))
8613 return lang_hooks.dwarf_name (decl, scope ? 1 : 0);
8616 /* Add a new entry to .debug_pubnames if appropriate. */
8619 add_pubname_string (const char *str, dw_die_ref die)
8621 if (targetm.want_debug_pub_sections)
8626 e.name = xstrdup (str);
8627 VEC_safe_push (pubname_entry, gc, pubname_table, &e);
8632 add_pubname (tree decl, dw_die_ref die)
8634 if (targetm.want_debug_pub_sections && TREE_PUBLIC (decl))
8636 const char *name = dwarf2_name (decl, 1);
8638 add_pubname_string (name, die);
8642 /* Add a new entry to .debug_pubtypes if appropriate. */
8645 add_pubtype (tree decl, dw_die_ref die)
8649 if (!targetm.want_debug_pub_sections)
8653 if ((TREE_PUBLIC (decl)
8654 || is_cu_die (die->die_parent))
8655 && (die->die_tag == DW_TAG_typedef || COMPLETE_TYPE_P (decl)))
8660 if (TYPE_NAME (decl))
8662 if (TREE_CODE (TYPE_NAME (decl)) == IDENTIFIER_NODE)
8663 e.name = IDENTIFIER_POINTER (TYPE_NAME (decl));
8664 else if (TREE_CODE (TYPE_NAME (decl)) == TYPE_DECL
8665 && DECL_NAME (TYPE_NAME (decl)))
8666 e.name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (decl)));
8668 e.name = xstrdup ((const char *) get_AT_string (die, DW_AT_name));
8673 e.name = dwarf2_name (decl, 1);
8675 e.name = xstrdup (e.name);
8678 /* If we don't have a name for the type, there's no point in adding
8680 if (e.name && e.name[0] != '\0')
8681 VEC_safe_push (pubname_entry, gc, pubtype_table, &e);
8685 /* Output the public names table used to speed up access to externally
8686 visible names; or the public types table used to find type definitions. */
8689 output_pubnames (VEC (pubname_entry, gc) * names)
8692 unsigned long pubnames_length = size_of_pubnames (names);
8695 if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4)
8696 dw2_asm_output_data (4, 0xffffffff,
8697 "Initial length escape value indicating 64-bit DWARF extension");
8698 if (names == pubname_table)
8699 dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length,
8700 "Length of Public Names Info");
8702 dw2_asm_output_data (DWARF_OFFSET_SIZE, pubnames_length,
8703 "Length of Public Type Names Info");
8704 /* Version number for pubnames/pubtypes is still 2, even in DWARF3. */
8705 dw2_asm_output_data (2, 2, "DWARF Version");
8706 dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label,
8708 "Offset of Compilation Unit Info");
8709 dw2_asm_output_data (DWARF_OFFSET_SIZE, next_die_offset,
8710 "Compilation Unit Length");
8712 FOR_EACH_VEC_ELT (pubname_entry, names, i, pub)
8714 /* We shouldn't see pubnames for DIEs outside of the main CU. */
8715 if (names == pubname_table)
8716 gcc_assert (pub->die->die_mark);
8718 if (names != pubtype_table
8719 || pub->die->die_offset != 0
8720 || !flag_eliminate_unused_debug_types)
8722 dw2_asm_output_data (DWARF_OFFSET_SIZE, pub->die->die_offset,
8725 dw2_asm_output_nstring (pub->name, -1, "external name");
8729 dw2_asm_output_data (DWARF_OFFSET_SIZE, 0, NULL);
8732 /* Output the information that goes into the .debug_aranges table.
8733 Namely, define the beginning and ending address range of the
8734 text section generated for this compilation unit. */
8737 output_aranges (unsigned long aranges_length)
8741 if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4)
8742 dw2_asm_output_data (4, 0xffffffff,
8743 "Initial length escape value indicating 64-bit DWARF extension");
8744 dw2_asm_output_data (DWARF_OFFSET_SIZE, aranges_length,
8745 "Length of Address Ranges Info");
8746 /* Version number for aranges is still 2, even in DWARF3. */
8747 dw2_asm_output_data (2, 2, "DWARF Version");
8748 dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_info_section_label,
8750 "Offset of Compilation Unit Info");
8751 dw2_asm_output_data (1, DWARF2_ADDR_SIZE, "Size of Address");
8752 dw2_asm_output_data (1, 0, "Size of Segment Descriptor");
8754 /* We need to align to twice the pointer size here. */
8755 if (DWARF_ARANGES_PAD_SIZE)
8757 /* Pad using a 2 byte words so that padding is correct for any
8759 dw2_asm_output_data (2, 0, "Pad to %d byte boundary",
8760 2 * DWARF2_ADDR_SIZE);
8761 for (i = 2; i < (unsigned) DWARF_ARANGES_PAD_SIZE; i += 2)
8762 dw2_asm_output_data (2, 0, NULL);
8765 /* It is necessary not to output these entries if the sections were
8766 not used; if the sections were not used, the length will be 0 and
8767 the address may end up as 0 if the section is discarded by ld
8768 --gc-sections, leaving an invalid (0, 0) entry that can be
8769 confused with the terminator. */
8770 if (text_section_used)
8772 dw2_asm_output_addr (DWARF2_ADDR_SIZE, text_section_label, "Address");
8773 dw2_asm_output_delta (DWARF2_ADDR_SIZE, text_end_label,
8774 text_section_label, "Length");
8776 if (cold_text_section_used)
8778 dw2_asm_output_addr (DWARF2_ADDR_SIZE, cold_text_section_label,
8780 dw2_asm_output_delta (DWARF2_ADDR_SIZE, cold_end_label,
8781 cold_text_section_label, "Length");
8784 if (have_multiple_function_sections)
8789 FOR_EACH_VEC_ELT (dw_fde_ref, fde_vec, fde_idx, fde)
8791 if (!fde->in_std_section)
8793 dw2_asm_output_addr (DWARF2_ADDR_SIZE, fde->dw_fde_begin,
8795 dw2_asm_output_delta (DWARF2_ADDR_SIZE, fde->dw_fde_end,
8796 fde->dw_fde_begin, "Length");
8798 if (fde->dw_fde_second_begin && !fde->second_in_std_section)
8800 dw2_asm_output_addr (DWARF2_ADDR_SIZE, fde->dw_fde_second_begin,
8802 dw2_asm_output_delta (DWARF2_ADDR_SIZE, fde->dw_fde_second_end,
8803 fde->dw_fde_second_begin, "Length");
8808 /* Output the terminator words. */
8809 dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL);
8810 dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL);
8813 /* Add a new entry to .debug_ranges. Return the offset at which it
8817 add_ranges_num (int num)
8819 unsigned int in_use = ranges_table_in_use;
8821 if (in_use == ranges_table_allocated)
8823 ranges_table_allocated += RANGES_TABLE_INCREMENT;
8824 ranges_table = GGC_RESIZEVEC (struct dw_ranges_struct, ranges_table,
8825 ranges_table_allocated);
8826 memset (ranges_table + ranges_table_in_use, 0,
8827 RANGES_TABLE_INCREMENT * sizeof (struct dw_ranges_struct));
8830 ranges_table[in_use].num = num;
8831 ranges_table_in_use = in_use + 1;
8833 return in_use * 2 * DWARF2_ADDR_SIZE;
8836 /* Add a new entry to .debug_ranges corresponding to a block, or a
8837 range terminator if BLOCK is NULL. */
8840 add_ranges (const_tree block)
8842 return add_ranges_num (block ? BLOCK_NUMBER (block) : 0);
8845 /* Add a new entry to .debug_ranges corresponding to a pair of
8849 add_ranges_by_labels (dw_die_ref die, const char *begin, const char *end,
8852 unsigned int in_use = ranges_by_label_in_use;
8853 unsigned int offset;
8855 if (in_use == ranges_by_label_allocated)
8857 ranges_by_label_allocated += RANGES_TABLE_INCREMENT;
8858 ranges_by_label = GGC_RESIZEVEC (struct dw_ranges_by_label_struct,
8860 ranges_by_label_allocated);
8861 memset (ranges_by_label + ranges_by_label_in_use, 0,
8862 RANGES_TABLE_INCREMENT
8863 * sizeof (struct dw_ranges_by_label_struct));
8866 ranges_by_label[in_use].begin = begin;
8867 ranges_by_label[in_use].end = end;
8868 ranges_by_label_in_use = in_use + 1;
8870 offset = add_ranges_num (-(int)in_use - 1);
8873 add_AT_range_list (die, DW_AT_ranges, offset);
8879 output_ranges (void)
8882 static const char *const start_fmt = "Offset %#x";
8883 const char *fmt = start_fmt;
8885 for (i = 0; i < ranges_table_in_use; i++)
8887 int block_num = ranges_table[i].num;
8891 char blabel[MAX_ARTIFICIAL_LABEL_BYTES];
8892 char elabel[MAX_ARTIFICIAL_LABEL_BYTES];
8894 ASM_GENERATE_INTERNAL_LABEL (blabel, BLOCK_BEGIN_LABEL, block_num);
8895 ASM_GENERATE_INTERNAL_LABEL (elabel, BLOCK_END_LABEL, block_num);
8897 /* If all code is in the text section, then the compilation
8898 unit base address defaults to DW_AT_low_pc, which is the
8899 base of the text section. */
8900 if (!have_multiple_function_sections)
8902 dw2_asm_output_delta (DWARF2_ADDR_SIZE, blabel,
8904 fmt, i * 2 * DWARF2_ADDR_SIZE);
8905 dw2_asm_output_delta (DWARF2_ADDR_SIZE, elabel,
8906 text_section_label, NULL);
8909 /* Otherwise, the compilation unit base address is zero,
8910 which allows us to use absolute addresses, and not worry
8911 about whether the target supports cross-section
8915 dw2_asm_output_addr (DWARF2_ADDR_SIZE, blabel,
8916 fmt, i * 2 * DWARF2_ADDR_SIZE);
8917 dw2_asm_output_addr (DWARF2_ADDR_SIZE, elabel, NULL);
8923 /* Negative block_num stands for an index into ranges_by_label. */
8924 else if (block_num < 0)
8926 int lab_idx = - block_num - 1;
8928 if (!have_multiple_function_sections)
8932 /* If we ever use add_ranges_by_labels () for a single
8933 function section, all we have to do is to take out
8935 dw2_asm_output_delta (DWARF2_ADDR_SIZE,
8936 ranges_by_label[lab_idx].begin,
8938 fmt, i * 2 * DWARF2_ADDR_SIZE);
8939 dw2_asm_output_delta (DWARF2_ADDR_SIZE,
8940 ranges_by_label[lab_idx].end,
8941 text_section_label, NULL);
8946 dw2_asm_output_addr (DWARF2_ADDR_SIZE,
8947 ranges_by_label[lab_idx].begin,
8948 fmt, i * 2 * DWARF2_ADDR_SIZE);
8949 dw2_asm_output_addr (DWARF2_ADDR_SIZE,
8950 ranges_by_label[lab_idx].end,
8956 dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL);
8957 dw2_asm_output_data (DWARF2_ADDR_SIZE, 0, NULL);
8963 /* Data structure containing information about input files. */
8966 const char *path; /* Complete file name. */
8967 const char *fname; /* File name part. */
8968 int length; /* Length of entire string. */
8969 struct dwarf_file_data * file_idx; /* Index in input file table. */
8970 int dir_idx; /* Index in directory table. */
8973 /* Data structure containing information about directories with source
8977 const char *path; /* Path including directory name. */
8978 int length; /* Path length. */
8979 int prefix; /* Index of directory entry which is a prefix. */
8980 int count; /* Number of files in this directory. */
8981 int dir_idx; /* Index of directory used as base. */
8984 /* Callback function for file_info comparison. We sort by looking at
8985 the directories in the path. */
8988 file_info_cmp (const void *p1, const void *p2)
8990 const struct file_info *const s1 = (const struct file_info *) p1;
8991 const struct file_info *const s2 = (const struct file_info *) p2;
8992 const unsigned char *cp1;
8993 const unsigned char *cp2;
8995 /* Take care of file names without directories. We need to make sure that
8996 we return consistent values to qsort since some will get confused if
8997 we return the same value when identical operands are passed in opposite
8998 orders. So if neither has a directory, return 0 and otherwise return
8999 1 or -1 depending on which one has the directory. */
9000 if ((s1->path == s1->fname || s2->path == s2->fname))
9001 return (s2->path == s2->fname) - (s1->path == s1->fname);
9003 cp1 = (const unsigned char *) s1->path;
9004 cp2 = (const unsigned char *) s2->path;
9010 /* Reached the end of the first path? If so, handle like above. */
9011 if ((cp1 == (const unsigned char *) s1->fname)
9012 || (cp2 == (const unsigned char *) s2->fname))
9013 return ((cp2 == (const unsigned char *) s2->fname)
9014 - (cp1 == (const unsigned char *) s1->fname));
9016 /* Character of current path component the same? */
9017 else if (*cp1 != *cp2)
9022 struct file_name_acquire_data
9024 struct file_info *files;
9029 /* Traversal function for the hash table. */
9032 file_name_acquire (void ** slot, void *data)
9034 struct file_name_acquire_data *fnad = (struct file_name_acquire_data *) data;
9035 struct dwarf_file_data *d = (struct dwarf_file_data *) *slot;
9036 struct file_info *fi;
9039 gcc_assert (fnad->max_files >= d->emitted_number);
9041 if (! d->emitted_number)
9044 gcc_assert (fnad->max_files != fnad->used_files);
9046 fi = fnad->files + fnad->used_files++;
9048 /* Skip all leading "./". */
9050 while (f[0] == '.' && IS_DIR_SEPARATOR (f[1]))
9053 /* Create a new array entry. */
9055 fi->length = strlen (f);
9058 /* Search for the file name part. */
9059 f = strrchr (f, DIR_SEPARATOR);
9060 #if defined (DIR_SEPARATOR_2)
9062 char *g = strrchr (fi->path, DIR_SEPARATOR_2);
9066 if (f == NULL || f < g)
9072 fi->fname = f == NULL ? fi->path : f + 1;
9076 /* Output the directory table and the file name table. We try to minimize
9077 the total amount of memory needed. A heuristic is used to avoid large
9078 slowdowns with many input files. */
9081 output_file_names (void)
9083 struct file_name_acquire_data fnad;
9085 struct file_info *files;
9086 struct dir_info *dirs;
9094 if (!last_emitted_file)
9096 dw2_asm_output_data (1, 0, "End directory table");
9097 dw2_asm_output_data (1, 0, "End file name table");
9101 numfiles = last_emitted_file->emitted_number;
9103 /* Allocate the various arrays we need. */
9104 files = XALLOCAVEC (struct file_info, numfiles);
9105 dirs = XALLOCAVEC (struct dir_info, numfiles);
9108 fnad.used_files = 0;
9109 fnad.max_files = numfiles;
9110 htab_traverse (file_table, file_name_acquire, &fnad);
9111 gcc_assert (fnad.used_files == fnad.max_files);
9113 qsort (files, numfiles, sizeof (files[0]), file_info_cmp);
9115 /* Find all the different directories used. */
9116 dirs[0].path = files[0].path;
9117 dirs[0].length = files[0].fname - files[0].path;
9118 dirs[0].prefix = -1;
9120 dirs[0].dir_idx = 0;
9121 files[0].dir_idx = 0;
9124 for (i = 1; i < numfiles; i++)
9125 if (files[i].fname - files[i].path == dirs[ndirs - 1].length
9126 && memcmp (dirs[ndirs - 1].path, files[i].path,
9127 dirs[ndirs - 1].length) == 0)
9129 /* Same directory as last entry. */
9130 files[i].dir_idx = ndirs - 1;
9131 ++dirs[ndirs - 1].count;
9137 /* This is a new directory. */
9138 dirs[ndirs].path = files[i].path;
9139 dirs[ndirs].length = files[i].fname - files[i].path;
9140 dirs[ndirs].count = 1;
9141 dirs[ndirs].dir_idx = ndirs;
9142 files[i].dir_idx = ndirs;
9144 /* Search for a prefix. */
9145 dirs[ndirs].prefix = -1;
9146 for (j = 0; j < ndirs; j++)
9147 if (dirs[j].length < dirs[ndirs].length
9148 && dirs[j].length > 1
9149 && (dirs[ndirs].prefix == -1
9150 || dirs[j].length > dirs[dirs[ndirs].prefix].length)
9151 && memcmp (dirs[j].path, dirs[ndirs].path, dirs[j].length) == 0)
9152 dirs[ndirs].prefix = j;
9157 /* Now to the actual work. We have to find a subset of the directories which
9158 allow expressing the file name using references to the directory table
9159 with the least amount of characters. We do not do an exhaustive search
9160 where we would have to check out every combination of every single
9161 possible prefix. Instead we use a heuristic which provides nearly optimal
9162 results in most cases and never is much off. */
9163 saved = XALLOCAVEC (int, ndirs);
9164 savehere = XALLOCAVEC (int, ndirs);
9166 memset (saved, '\0', ndirs * sizeof (saved[0]));
9167 for (i = 0; i < ndirs; i++)
9172 /* We can always save some space for the current directory. But this
9173 does not mean it will be enough to justify adding the directory. */
9174 savehere[i] = dirs[i].length;
9175 total = (savehere[i] - saved[i]) * dirs[i].count;
9177 for (j = i + 1; j < ndirs; j++)
9180 if (saved[j] < dirs[i].length)
9182 /* Determine whether the dirs[i] path is a prefix of the
9187 while (k != -1 && k != (int) i)
9192 /* Yes it is. We can possibly save some memory by
9193 writing the filenames in dirs[j] relative to
9195 savehere[j] = dirs[i].length;
9196 total += (savehere[j] - saved[j]) * dirs[j].count;
9201 /* Check whether we can save enough to justify adding the dirs[i]
9203 if (total > dirs[i].length + 1)
9205 /* It's worthwhile adding. */
9206 for (j = i; j < ndirs; j++)
9207 if (savehere[j] > 0)
9209 /* Remember how much we saved for this directory so far. */
9210 saved[j] = savehere[j];
9212 /* Remember the prefix directory. */
9213 dirs[j].dir_idx = i;
9218 /* Emit the directory name table. */
9219 idx_offset = dirs[0].length > 0 ? 1 : 0;
9220 for (i = 1 - idx_offset; i < ndirs; i++)
9221 dw2_asm_output_nstring (dirs[i].path,
9223 - !DWARF2_DIR_SHOULD_END_WITH_SEPARATOR,
9224 "Directory Entry: %#x", i + idx_offset);
9226 dw2_asm_output_data (1, 0, "End directory table");
9228 /* We have to emit them in the order of emitted_number since that's
9229 used in the debug info generation. To do this efficiently we
9230 generate a back-mapping of the indices first. */
9231 backmap = XALLOCAVEC (int, numfiles);
9232 for (i = 0; i < numfiles; i++)
9233 backmap[files[i].file_idx->emitted_number - 1] = i;
9235 /* Now write all the file names. */
9236 for (i = 0; i < numfiles; i++)
9238 int file_idx = backmap[i];
9239 int dir_idx = dirs[files[file_idx].dir_idx].dir_idx;
9241 #ifdef VMS_DEBUGGING_INFO
9242 #define MAX_VMS_VERSION_LEN 6 /* ";32768" */
9244 /* Setting these fields can lead to debugger miscomparisons,
9245 but VMS Debug requires them to be set correctly. */
9250 int maxfilelen = strlen (files[file_idx].path)
9251 + dirs[dir_idx].length
9252 + MAX_VMS_VERSION_LEN + 1;
9253 char *filebuf = XALLOCAVEC (char, maxfilelen);
9255 vms_file_stats_name (files[file_idx].path, 0, 0, 0, &ver);
9256 snprintf (filebuf, maxfilelen, "%s;%d",
9257 files[file_idx].path + dirs[dir_idx].length, ver);
9259 dw2_asm_output_nstring
9260 (filebuf, -1, "File Entry: %#x", (unsigned) i + 1);
9262 /* Include directory index. */
9263 dw2_asm_output_data_uleb128 (dir_idx + idx_offset, NULL);
9265 /* Modification time. */
9266 dw2_asm_output_data_uleb128
9267 ((vms_file_stats_name (files[file_idx].path, &cdt, 0, 0, 0) == 0)
9271 /* File length in bytes. */
9272 dw2_asm_output_data_uleb128
9273 ((vms_file_stats_name (files[file_idx].path, 0, &siz, 0, 0) == 0)
9277 dw2_asm_output_nstring (files[file_idx].path + dirs[dir_idx].length, -1,
9278 "File Entry: %#x", (unsigned) i + 1);
9280 /* Include directory index. */
9281 dw2_asm_output_data_uleb128 (dir_idx + idx_offset, NULL);
9283 /* Modification time. */
9284 dw2_asm_output_data_uleb128 (0, NULL);
9286 /* File length in bytes. */
9287 dw2_asm_output_data_uleb128 (0, NULL);
9288 #endif /* VMS_DEBUGGING_INFO */
9291 dw2_asm_output_data (1, 0, "End file name table");
9295 /* Output one line number table into the .debug_line section. */
9298 output_one_line_info_table (dw_line_info_table *table)
9300 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
9301 unsigned int current_line = 1;
9302 bool current_is_stmt = DWARF_LINE_DEFAULT_IS_STMT_START;
9303 dw_line_info_entry *ent;
9306 FOR_EACH_VEC_ELT (dw_line_info_entry, table->entries, i, ent)
9308 switch (ent->opcode)
9310 case LI_set_address:
9311 /* ??? Unfortunately, we have little choice here currently, and
9312 must always use the most general form. GCC does not know the
9313 address delta itself, so we can't use DW_LNS_advance_pc. Many
9314 ports do have length attributes which will give an upper bound
9315 on the address range. We could perhaps use length attributes
9316 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
9317 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, ent->val);
9319 /* This can handle any delta. This takes
9320 4+DWARF2_ADDR_SIZE bytes. */
9321 dw2_asm_output_data (1, 0, "set address %s", line_label);
9322 dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL);
9323 dw2_asm_output_data (1, DW_LNE_set_address, NULL);
9324 dw2_asm_output_addr (DWARF2_ADDR_SIZE, line_label, NULL);
9328 if (ent->val == current_line)
9330 /* We still need to start a new row, so output a copy insn. */
9331 dw2_asm_output_data (1, DW_LNS_copy,
9332 "copy line %u", current_line);
9336 int line_offset = ent->val - current_line;
9337 int line_delta = line_offset - DWARF_LINE_BASE;
9339 current_line = ent->val;
9340 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
9342 /* This can handle deltas from -10 to 234, using the current
9343 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE.
9344 This takes 1 byte. */
9345 dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE + line_delta,
9346 "line %u", current_line);
9350 /* This can handle any delta. This takes at least 4 bytes,
9351 depending on the value being encoded. */
9352 dw2_asm_output_data (1, DW_LNS_advance_line,
9353 "advance to line %u", current_line);
9354 dw2_asm_output_data_sleb128 (line_offset, NULL);
9355 dw2_asm_output_data (1, DW_LNS_copy, NULL);
9361 dw2_asm_output_data (1, DW_LNS_set_file, "set file %u", ent->val);
9362 dw2_asm_output_data_uleb128 (ent->val, "%u", ent->val);
9366 dw2_asm_output_data (1, DW_LNS_set_column, "column %u", ent->val);
9367 dw2_asm_output_data_uleb128 (ent->val, "%u", ent->val);
9370 case LI_negate_stmt:
9371 current_is_stmt = !current_is_stmt;
9372 dw2_asm_output_data (1, DW_LNS_negate_stmt,
9373 "is_stmt %d", current_is_stmt);
9376 case LI_set_prologue_end:
9377 dw2_asm_output_data (1, DW_LNS_set_prologue_end,
9378 "set prologue end");
9381 case LI_set_epilogue_begin:
9382 dw2_asm_output_data (1, DW_LNS_set_epilogue_begin,
9383 "set epilogue begin");
9386 case LI_set_discriminator:
9387 dw2_asm_output_data (1, 0, "discriminator %u", ent->val);
9388 dw2_asm_output_data_uleb128 (1 + size_of_uleb128 (ent->val), NULL);
9389 dw2_asm_output_data (1, DW_LNE_set_discriminator, NULL);
9390 dw2_asm_output_data_uleb128 (ent->val, NULL);
9395 /* Emit debug info for the address of the end of the table. */
9396 dw2_asm_output_data (1, 0, "set address %s", table->end_label);
9397 dw2_asm_output_data_uleb128 (1 + DWARF2_ADDR_SIZE, NULL);
9398 dw2_asm_output_data (1, DW_LNE_set_address, NULL);
9399 dw2_asm_output_addr (DWARF2_ADDR_SIZE, table->end_label, NULL);
9401 dw2_asm_output_data (1, 0, "end sequence");
9402 dw2_asm_output_data_uleb128 (1, NULL);
9403 dw2_asm_output_data (1, DW_LNE_end_sequence, NULL);
9406 /* Output the source line number correspondence information. This
9407 information goes into the .debug_line section. */
9410 output_line_info (void)
9412 char l1[20], l2[20], p1[20], p2[20];
9413 int ver = dwarf_version;
9414 bool saw_one = false;
9417 ASM_GENERATE_INTERNAL_LABEL (l1, LINE_NUMBER_BEGIN_LABEL, 0);
9418 ASM_GENERATE_INTERNAL_LABEL (l2, LINE_NUMBER_END_LABEL, 0);
9419 ASM_GENERATE_INTERNAL_LABEL (p1, LN_PROLOG_AS_LABEL, 0);
9420 ASM_GENERATE_INTERNAL_LABEL (p2, LN_PROLOG_END_LABEL, 0);
9422 if (DWARF_INITIAL_LENGTH_SIZE - DWARF_OFFSET_SIZE == 4)
9423 dw2_asm_output_data (4, 0xffffffff,
9424 "Initial length escape value indicating 64-bit DWARF extension");
9425 dw2_asm_output_delta (DWARF_OFFSET_SIZE, l2, l1,
9426 "Length of Source Line Info");
9427 ASM_OUTPUT_LABEL (asm_out_file, l1);
9429 dw2_asm_output_data (2, ver, "DWARF Version");
9430 dw2_asm_output_delta (DWARF_OFFSET_SIZE, p2, p1, "Prolog Length");
9431 ASM_OUTPUT_LABEL (asm_out_file, p1);
9433 /* Define the architecture-dependent minimum instruction length (in bytes).
9434 In this implementation of DWARF, this field is used for information
9435 purposes only. Since GCC generates assembly language, we have no
9436 a priori knowledge of how many instruction bytes are generated for each
9437 source line, and therefore can use only the DW_LNE_set_address and
9438 DW_LNS_fixed_advance_pc line information commands. Accordingly, we fix
9439 this as '1', which is "correct enough" for all architectures,
9440 and don't let the target override. */
9441 dw2_asm_output_data (1, 1, "Minimum Instruction Length");
9444 dw2_asm_output_data (1, DWARF_LINE_DEFAULT_MAX_OPS_PER_INSN,
9445 "Maximum Operations Per Instruction");
9446 dw2_asm_output_data (1, DWARF_LINE_DEFAULT_IS_STMT_START,
9447 "Default is_stmt_start flag");
9448 dw2_asm_output_data (1, DWARF_LINE_BASE,
9449 "Line Base Value (Special Opcodes)");
9450 dw2_asm_output_data (1, DWARF_LINE_RANGE,
9451 "Line Range Value (Special Opcodes)");
9452 dw2_asm_output_data (1, DWARF_LINE_OPCODE_BASE,
9453 "Special Opcode Base");
9455 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; opc++)
9460 case DW_LNS_advance_pc:
9461 case DW_LNS_advance_line:
9462 case DW_LNS_set_file:
9463 case DW_LNS_set_column:
9464 case DW_LNS_fixed_advance_pc:
9465 case DW_LNS_set_isa:
9473 dw2_asm_output_data (1, n_op_args, "opcode: %#x has %d args",
9477 /* Write out the information about the files we use. */
9478 output_file_names ();
9479 ASM_OUTPUT_LABEL (asm_out_file, p2);
9481 if (separate_line_info)
9483 dw_line_info_table *table;
9486 FOR_EACH_VEC_ELT (dw_line_info_table_p, separate_line_info, i, table)
9489 output_one_line_info_table (table);
9493 if (cold_text_section_line_info && cold_text_section_line_info->in_use)
9495 output_one_line_info_table (cold_text_section_line_info);
9499 /* ??? Some Darwin linkers crash on a .debug_line section with no
9500 sequences. Further, merely a DW_LNE_end_sequence entry is not
9501 sufficient -- the address column must also be initialized.
9502 Make sure to output at least one set_address/end_sequence pair,
9503 choosing .text since that section is always present. */
9504 if (text_section_line_info->in_use || !saw_one)
9505 output_one_line_info_table (text_section_line_info);
9507 /* Output the marker for the end of the line number info. */
9508 ASM_OUTPUT_LABEL (asm_out_file, l2);
9511 /* Given a pointer to a tree node for some base type, return a pointer to
9512 a DIE that describes the given type.
9514 This routine must only be called for GCC type nodes that correspond to
9515 Dwarf base (fundamental) types. */
9518 base_type_die (tree type)
9520 dw_die_ref base_type_result;
9521 enum dwarf_type encoding;
9523 if (TREE_CODE (type) == ERROR_MARK || TREE_CODE (type) == VOID_TYPE)
9526 /* If this is a subtype that should not be emitted as a subrange type,
9527 use the base type. See subrange_type_for_debug_p. */
9528 if (TREE_CODE (type) == INTEGER_TYPE && TREE_TYPE (type) != NULL_TREE)
9529 type = TREE_TYPE (type);
9531 switch (TREE_CODE (type))
9534 if ((dwarf_version >= 4 || !dwarf_strict)
9536 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9537 && DECL_IS_BUILTIN (TYPE_NAME (type))
9538 && DECL_NAME (TYPE_NAME (type)))
9540 const char *name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
9541 if (strcmp (name, "char16_t") == 0
9542 || strcmp (name, "char32_t") == 0)
9544 encoding = DW_ATE_UTF;
9548 if (TYPE_STRING_FLAG (type))
9550 if (TYPE_UNSIGNED (type))
9551 encoding = DW_ATE_unsigned_char;
9553 encoding = DW_ATE_signed_char;
9555 else if (TYPE_UNSIGNED (type))
9556 encoding = DW_ATE_unsigned;
9558 encoding = DW_ATE_signed;
9562 if (DECIMAL_FLOAT_MODE_P (TYPE_MODE (type)))
9564 if (dwarf_version >= 3 || !dwarf_strict)
9565 encoding = DW_ATE_decimal_float;
9567 encoding = DW_ATE_lo_user;
9570 encoding = DW_ATE_float;
9573 case FIXED_POINT_TYPE:
9574 if (!(dwarf_version >= 3 || !dwarf_strict))
9575 encoding = DW_ATE_lo_user;
9576 else if (TYPE_UNSIGNED (type))
9577 encoding = DW_ATE_unsigned_fixed;
9579 encoding = DW_ATE_signed_fixed;
9582 /* Dwarf2 doesn't know anything about complex ints, so use
9583 a user defined type for it. */
9585 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
9586 encoding = DW_ATE_complex_float;
9588 encoding = DW_ATE_lo_user;
9592 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
9593 encoding = DW_ATE_boolean;
9597 /* No other TREE_CODEs are Dwarf fundamental types. */
9601 base_type_result = new_die (DW_TAG_base_type, comp_unit_die (), type);
9603 add_AT_unsigned (base_type_result, DW_AT_byte_size,
9604 int_size_in_bytes (type));
9605 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
9607 return base_type_result;
9610 /* Given a pointer to an arbitrary ..._TYPE tree node, return nonzero if the
9611 given input type is a Dwarf "fundamental" type. Otherwise return null. */
9614 is_base_type (tree type)
9616 switch (TREE_CODE (type))
9622 case FIXED_POINT_TYPE:
9630 case QUAL_UNION_TYPE:
9635 case REFERENCE_TYPE:
9649 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
9650 node, return the size in bits for the type if it is a constant, or else
9651 return the alignment for the type if the type's size is not constant, or
9652 else return BITS_PER_WORD if the type actually turns out to be an
9655 static inline unsigned HOST_WIDE_INT
9656 simple_type_size_in_bits (const_tree type)
9658 if (TREE_CODE (type) == ERROR_MARK)
9659 return BITS_PER_WORD;
9660 else if (TYPE_SIZE (type) == NULL_TREE)
9662 else if (host_integerp (TYPE_SIZE (type), 1))
9663 return tree_low_cst (TYPE_SIZE (type), 1);
9665 return TYPE_ALIGN (type);
9668 /* Similarly, but return a double_int instead of UHWI. */
9670 static inline double_int
9671 double_int_type_size_in_bits (const_tree type)
9673 if (TREE_CODE (type) == ERROR_MARK)
9674 return uhwi_to_double_int (BITS_PER_WORD);
9675 else if (TYPE_SIZE (type) == NULL_TREE)
9676 return double_int_zero;
9677 else if (TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
9678 return tree_to_double_int (TYPE_SIZE (type));
9680 return uhwi_to_double_int (TYPE_ALIGN (type));
9683 /* Given a pointer to a tree node for a subrange type, return a pointer
9684 to a DIE that describes the given type. */
9687 subrange_type_die (tree type, tree low, tree high, dw_die_ref context_die)
9689 dw_die_ref subrange_die;
9690 const HOST_WIDE_INT size_in_bytes = int_size_in_bytes (type);
9692 if (context_die == NULL)
9693 context_die = comp_unit_die ();
9695 subrange_die = new_die (DW_TAG_subrange_type, context_die, type);
9697 if (int_size_in_bytes (TREE_TYPE (type)) != size_in_bytes)
9699 /* The size of the subrange type and its base type do not match,
9700 so we need to generate a size attribute for the subrange type. */
9701 add_AT_unsigned (subrange_die, DW_AT_byte_size, size_in_bytes);
9705 add_bound_info (subrange_die, DW_AT_lower_bound, low);
9707 add_bound_info (subrange_die, DW_AT_upper_bound, high);
9709 return subrange_die;
9712 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
9713 entry that chains various modifiers in front of the given type. */
9716 modified_type_die (tree type, int is_const_type, int is_volatile_type,
9717 dw_die_ref context_die)
9719 enum tree_code code = TREE_CODE (type);
9720 dw_die_ref mod_type_die;
9721 dw_die_ref sub_die = NULL;
9722 tree item_type = NULL;
9723 tree qualified_type;
9724 tree name, low, high;
9726 if (code == ERROR_MARK)
9729 /* See if we already have the appropriately qualified variant of
9732 = get_qualified_type (type,
9733 ((is_const_type ? TYPE_QUAL_CONST : 0)
9734 | (is_volatile_type ? TYPE_QUAL_VOLATILE : 0)));
9736 if (qualified_type == sizetype
9737 && TYPE_NAME (qualified_type)
9738 && TREE_CODE (TYPE_NAME (qualified_type)) == TYPE_DECL)
9740 tree t = TREE_TYPE (TYPE_NAME (qualified_type));
9742 gcc_checking_assert (TREE_CODE (t) == INTEGER_TYPE
9743 && TYPE_PRECISION (t)
9744 == TYPE_PRECISION (qualified_type)
9745 && TYPE_UNSIGNED (t)
9746 == TYPE_UNSIGNED (qualified_type));
9750 /* If we do, then we can just use its DIE, if it exists. */
9753 mod_type_die = lookup_type_die (qualified_type);
9755 return mod_type_die;
9758 name = qualified_type ? TYPE_NAME (qualified_type) : NULL;
9760 /* Handle C typedef types. */
9761 if (name && TREE_CODE (name) == TYPE_DECL && DECL_ORIGINAL_TYPE (name)
9762 && !DECL_ARTIFICIAL (name))
9764 tree dtype = TREE_TYPE (name);
9766 if (qualified_type == dtype)
9768 /* For a named type, use the typedef. */
9769 gen_type_die (qualified_type, context_die);
9770 return lookup_type_die (qualified_type);
9772 else if (is_const_type < TYPE_READONLY (dtype)
9773 || is_volatile_type < TYPE_VOLATILE (dtype)
9774 || (is_const_type <= TYPE_READONLY (dtype)
9775 && is_volatile_type <= TYPE_VOLATILE (dtype)
9776 && DECL_ORIGINAL_TYPE (name) != type))
9777 /* cv-unqualified version of named type. Just use the unnamed
9778 type to which it refers. */
9779 return modified_type_die (DECL_ORIGINAL_TYPE (name),
9780 is_const_type, is_volatile_type,
9782 /* Else cv-qualified version of named type; fall through. */
9786 /* If both is_const_type and is_volatile_type, prefer the path
9787 which leads to a qualified type. */
9788 && (!is_volatile_type
9789 || get_qualified_type (type, TYPE_QUAL_CONST) == NULL_TREE
9790 || get_qualified_type (type, TYPE_QUAL_VOLATILE) != NULL_TREE))
9792 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die (), type);
9793 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
9795 else if (is_volatile_type)
9797 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die (), type);
9798 sub_die = modified_type_die (type, is_const_type, 0, context_die);
9800 else if (code == POINTER_TYPE)
9802 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die (), type);
9803 add_AT_unsigned (mod_type_die, DW_AT_byte_size,
9804 simple_type_size_in_bits (type) / BITS_PER_UNIT);
9805 item_type = TREE_TYPE (type);
9806 if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (item_type)))
9807 add_AT_unsigned (mod_type_die, DW_AT_address_class,
9808 TYPE_ADDR_SPACE (item_type));
9810 else if (code == REFERENCE_TYPE)
9812 if (TYPE_REF_IS_RVALUE (type) && dwarf_version >= 4)
9813 mod_type_die = new_die (DW_TAG_rvalue_reference_type, comp_unit_die (),
9816 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die (), type);
9817 add_AT_unsigned (mod_type_die, DW_AT_byte_size,
9818 simple_type_size_in_bits (type) / BITS_PER_UNIT);
9819 item_type = TREE_TYPE (type);
9820 if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (item_type)))
9821 add_AT_unsigned (mod_type_die, DW_AT_address_class,
9822 TYPE_ADDR_SPACE (item_type));
9824 else if (code == INTEGER_TYPE
9825 && TREE_TYPE (type) != NULL_TREE
9826 && subrange_type_for_debug_p (type, &low, &high))
9828 mod_type_die = subrange_type_die (type, low, high, context_die);
9829 item_type = TREE_TYPE (type);
9831 else if (is_base_type (type))
9832 mod_type_die = base_type_die (type);
9835 gen_type_die (type, context_die);
9837 /* We have to get the type_main_variant here (and pass that to the
9838 `lookup_type_die' routine) because the ..._TYPE node we have
9839 might simply be a *copy* of some original type node (where the
9840 copy was created to help us keep track of typedef names) and
9841 that copy might have a different TYPE_UID from the original
9843 if (TREE_CODE (type) != VECTOR_TYPE)
9844 return lookup_type_die (type_main_variant (type));
9846 /* Vectors have the debugging information in the type,
9847 not the main variant. */
9848 return lookup_type_die (type);
9851 /* Builtin types don't have a DECL_ORIGINAL_TYPE. For those,
9852 don't output a DW_TAG_typedef, since there isn't one in the
9853 user's program; just attach a DW_AT_name to the type.
9854 Don't attach a DW_AT_name to DW_TAG_const_type or DW_TAG_volatile_type
9855 if the base type already has the same name. */
9857 && ((TREE_CODE (name) != TYPE_DECL
9858 && (qualified_type == TYPE_MAIN_VARIANT (type)
9859 || (!is_const_type && !is_volatile_type)))
9860 || (TREE_CODE (name) == TYPE_DECL
9861 && TREE_TYPE (name) == qualified_type
9862 && DECL_NAME (name))))
9864 if (TREE_CODE (name) == TYPE_DECL)
9865 /* Could just call add_name_and_src_coords_attributes here,
9866 but since this is a builtin type it doesn't have any
9867 useful source coordinates anyway. */
9868 name = DECL_NAME (name);
9869 add_name_attribute (mod_type_die, IDENTIFIER_POINTER (name));
9870 add_gnat_descriptive_type_attribute (mod_type_die, type, context_die);
9871 if (TYPE_ARTIFICIAL (type))
9872 add_AT_flag (mod_type_die, DW_AT_artificial, 1);
9874 /* This probably indicates a bug. */
9875 else if (mod_type_die && mod_type_die->die_tag == DW_TAG_base_type)
9877 name = TYPE_NAME (type);
9879 && TREE_CODE (name) == TYPE_DECL)
9880 name = DECL_NAME (name);
9881 add_name_attribute (mod_type_die,
9882 name ? IDENTIFIER_POINTER (name) : "__unknown__");
9886 equate_type_number_to_die (qualified_type, mod_type_die);
9889 /* We must do this after the equate_type_number_to_die call, in case
9890 this is a recursive type. This ensures that the modified_type_die
9891 recursion will terminate even if the type is recursive. Recursive
9892 types are possible in Ada. */
9893 sub_die = modified_type_die (item_type,
9894 TYPE_READONLY (item_type),
9895 TYPE_VOLATILE (item_type),
9898 if (sub_die != NULL)
9899 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
9901 return mod_type_die;
9904 /* Generate DIEs for the generic parameters of T.
9905 T must be either a generic type or a generic function.
9906 See http://gcc.gnu.org/wiki/TemplateParmsDwarf for more. */
9909 gen_generic_params_dies (tree t)
9913 dw_die_ref die = NULL;
9915 if (!t || (TYPE_P (t) && !COMPLETE_TYPE_P (t)))
9919 die = lookup_type_die (t);
9920 else if (DECL_P (t))
9921 die = lookup_decl_die (t);
9925 parms = lang_hooks.get_innermost_generic_parms (t);
9927 /* T has no generic parameter. It means T is neither a generic type
9928 or function. End of story. */
9931 parms_num = TREE_VEC_LENGTH (parms);
9932 args = lang_hooks.get_innermost_generic_args (t);
9933 for (i = 0; i < parms_num; i++)
9935 tree parm, arg, arg_pack_elems;
9937 parm = TREE_VEC_ELT (parms, i);
9938 arg = TREE_VEC_ELT (args, i);
9939 arg_pack_elems = lang_hooks.types.get_argument_pack_elems (arg);
9940 gcc_assert (parm && TREE_VALUE (parm) && arg);
9942 if (parm && TREE_VALUE (parm) && arg)
9944 /* If PARM represents a template parameter pack,
9945 emit a DW_TAG_GNU_template_parameter_pack DIE, followed
9946 by DW_TAG_template_*_parameter DIEs for the argument
9947 pack elements of ARG. Note that ARG would then be
9948 an argument pack. */
9950 template_parameter_pack_die (TREE_VALUE (parm),
9954 generic_parameter_die (TREE_VALUE (parm), arg,
9955 true /* Emit DW_AT_name */, die);
9960 /* Create and return a DIE for PARM which should be
9961 the representation of a generic type parameter.
9962 For instance, in the C++ front end, PARM would be a template parameter.
9963 ARG is the argument to PARM.
9964 EMIT_NAME_P if tree, the DIE will have DW_AT_name attribute set to the
9966 PARENT_DIE is the parent DIE which the new created DIE should be added to,
9970 generic_parameter_die (tree parm, tree arg,
9972 dw_die_ref parent_die)
9974 dw_die_ref tmpl_die = NULL;
9975 const char *name = NULL;
9977 if (!parm || !DECL_NAME (parm) || !arg)
9980 /* We support non-type generic parameters and arguments,
9981 type generic parameters and arguments, as well as
9982 generic generic parameters (a.k.a. template template parameters in C++)
9984 if (TREE_CODE (parm) == PARM_DECL)
9985 /* PARM is a nontype generic parameter */
9986 tmpl_die = new_die (DW_TAG_template_value_param, parent_die, parm);
9987 else if (TREE_CODE (parm) == TYPE_DECL)
9988 /* PARM is a type generic parameter. */
9989 tmpl_die = new_die (DW_TAG_template_type_param, parent_die, parm);
9990 else if (lang_hooks.decls.generic_generic_parameter_decl_p (parm))
9991 /* PARM is a generic generic parameter.
9992 Its DIE is a GNU extension. It shall have a
9993 DW_AT_name attribute to represent the name of the template template
9994 parameter, and a DW_AT_GNU_template_name attribute to represent the
9995 name of the template template argument. */
9996 tmpl_die = new_die (DW_TAG_GNU_template_template_param,
10005 /* If PARM is a generic parameter pack, it means we are
10006 emitting debug info for a template argument pack element.
10007 In other terms, ARG is a template argument pack element.
10008 In that case, we don't emit any DW_AT_name attribute for
10012 name = IDENTIFIER_POINTER (DECL_NAME (parm));
10014 add_AT_string (tmpl_die, DW_AT_name, name);
10017 if (!lang_hooks.decls.generic_generic_parameter_decl_p (parm))
10019 /* DWARF3, 5.6.8 says if PARM is a non-type generic parameter
10020 TMPL_DIE should have a child DW_AT_type attribute that is set
10021 to the type of the argument to PARM, which is ARG.
10022 If PARM is a type generic parameter, TMPL_DIE should have a
10023 child DW_AT_type that is set to ARG. */
10024 tmpl_type = TYPE_P (arg) ? arg : TREE_TYPE (arg);
10025 add_type_attribute (tmpl_die, tmpl_type, 0,
10026 TREE_THIS_VOLATILE (tmpl_type),
10031 /* So TMPL_DIE is a DIE representing a
10032 a generic generic template parameter, a.k.a template template
10033 parameter in C++ and arg is a template. */
10035 /* The DW_AT_GNU_template_name attribute of the DIE must be set
10036 to the name of the argument. */
10037 name = dwarf2_name (TYPE_P (arg) ? TYPE_NAME (arg) : arg, 1);
10039 add_AT_string (tmpl_die, DW_AT_GNU_template_name, name);
10042 if (TREE_CODE (parm) == PARM_DECL)
10043 /* So PARM is a non-type generic parameter.
10044 DWARF3 5.6.8 says we must set a DW_AT_const_value child
10045 attribute of TMPL_DIE which value represents the value
10047 We must be careful here:
10048 The value of ARG might reference some function decls.
10049 We might currently be emitting debug info for a generic
10050 type and types are emitted before function decls, we don't
10051 know if the function decls referenced by ARG will actually be
10052 emitted after cgraph computations.
10053 So must defer the generation of the DW_AT_const_value to
10054 after cgraph is ready. */
10055 append_entry_to_tmpl_value_parm_die_table (tmpl_die, arg);
10061 /* Generate and return a DW_TAG_GNU_template_parameter_pack DIE representing.
10062 PARM_PACK must be a template parameter pack. The returned DIE
10063 will be child DIE of PARENT_DIE. */
10066 template_parameter_pack_die (tree parm_pack,
10067 tree parm_pack_args,
10068 dw_die_ref parent_die)
10073 gcc_assert (parent_die && parm_pack);
10075 die = new_die (DW_TAG_GNU_template_parameter_pack, parent_die, parm_pack);
10076 add_name_and_src_coords_attributes (die, parm_pack);
10077 for (j = 0; j < TREE_VEC_LENGTH (parm_pack_args); j++)
10078 generic_parameter_die (parm_pack,
10079 TREE_VEC_ELT (parm_pack_args, j),
10080 false /* Don't emit DW_AT_name */,
10085 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
10086 an enumerated type. */
10089 type_is_enum (const_tree type)
10091 return TREE_CODE (type) == ENUMERAL_TYPE;
10094 /* Return the DBX register number described by a given RTL node. */
10096 static unsigned int
10097 dbx_reg_number (const_rtx rtl)
10099 unsigned regno = REGNO (rtl);
10101 gcc_assert (regno < FIRST_PSEUDO_REGISTER);
10103 #ifdef LEAF_REG_REMAP
10104 if (current_function_uses_only_leaf_regs)
10106 int leaf_reg = LEAF_REG_REMAP (regno);
10107 if (leaf_reg != -1)
10108 regno = (unsigned) leaf_reg;
10112 return DBX_REGISTER_NUMBER (regno);
10115 /* Optionally add a DW_OP_piece term to a location description expression.
10116 DW_OP_piece is only added if the location description expression already
10117 doesn't end with DW_OP_piece. */
10120 add_loc_descr_op_piece (dw_loc_descr_ref *list_head, int size)
10122 dw_loc_descr_ref loc;
10124 if (*list_head != NULL)
10126 /* Find the end of the chain. */
10127 for (loc = *list_head; loc->dw_loc_next != NULL; loc = loc->dw_loc_next)
10130 if (loc->dw_loc_opc != DW_OP_piece)
10131 loc->dw_loc_next = new_loc_descr (DW_OP_piece, size, 0);
10135 /* Return a location descriptor that designates a machine register or
10136 zero if there is none. */
10138 static dw_loc_descr_ref
10139 reg_loc_descriptor (rtx rtl, enum var_init_status initialized)
10143 if (REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
10146 /* We only use "frame base" when we're sure we're talking about the
10147 post-prologue local stack frame. We do this by *not* running
10148 register elimination until this point, and recognizing the special
10149 argument pointer and soft frame pointer rtx's.
10150 Use DW_OP_fbreg offset DW_OP_stack_value in this case. */
10151 if ((rtl == arg_pointer_rtx || rtl == frame_pointer_rtx)
10152 && eliminate_regs (rtl, VOIDmode, NULL_RTX) != rtl)
10154 dw_loc_descr_ref result = NULL;
10156 if (dwarf_version >= 4 || !dwarf_strict)
10158 result = mem_loc_descriptor (rtl, GET_MODE (rtl), VOIDmode,
10161 add_loc_descr (&result,
10162 new_loc_descr (DW_OP_stack_value, 0, 0));
10167 regs = targetm.dwarf_register_span (rtl);
10169 if (hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)] > 1 || regs)
10170 return multiple_reg_loc_descriptor (rtl, regs, initialized);
10172 return one_reg_loc_descriptor (dbx_reg_number (rtl), initialized);
10175 /* Return a location descriptor that designates a machine register for
10176 a given hard register number. */
10178 static dw_loc_descr_ref
10179 one_reg_loc_descriptor (unsigned int regno, enum var_init_status initialized)
10181 dw_loc_descr_ref reg_loc_descr;
10185 = new_loc_descr ((enum dwarf_location_atom) (DW_OP_reg0 + regno), 0, 0);
10187 reg_loc_descr = new_loc_descr (DW_OP_regx, regno, 0);
10189 if (initialized == VAR_INIT_STATUS_UNINITIALIZED)
10190 add_loc_descr (®_loc_descr, new_loc_descr (DW_OP_GNU_uninit, 0, 0));
10192 return reg_loc_descr;
10195 /* Given an RTL of a register, return a location descriptor that
10196 designates a value that spans more than one register. */
10198 static dw_loc_descr_ref
10199 multiple_reg_loc_descriptor (rtx rtl, rtx regs,
10200 enum var_init_status initialized)
10202 int nregs, size, i;
10204 dw_loc_descr_ref loc_result = NULL;
10207 #ifdef LEAF_REG_REMAP
10208 if (current_function_uses_only_leaf_regs)
10210 int leaf_reg = LEAF_REG_REMAP (reg);
10211 if (leaf_reg != -1)
10212 reg = (unsigned) leaf_reg;
10215 gcc_assert ((unsigned) DBX_REGISTER_NUMBER (reg) == dbx_reg_number (rtl));
10216 nregs = hard_regno_nregs[REGNO (rtl)][GET_MODE (rtl)];
10218 /* Simple, contiguous registers. */
10219 if (regs == NULL_RTX)
10221 size = GET_MODE_SIZE (GET_MODE (rtl)) / nregs;
10226 dw_loc_descr_ref t;
10228 t = one_reg_loc_descriptor (DBX_REGISTER_NUMBER (reg),
10229 VAR_INIT_STATUS_INITIALIZED);
10230 add_loc_descr (&loc_result, t);
10231 add_loc_descr_op_piece (&loc_result, size);
10237 /* Now onto stupid register sets in non contiguous locations. */
10239 gcc_assert (GET_CODE (regs) == PARALLEL);
10241 size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0)));
10244 for (i = 0; i < XVECLEN (regs, 0); ++i)
10246 dw_loc_descr_ref t;
10248 t = one_reg_loc_descriptor (REGNO (XVECEXP (regs, 0, i)),
10249 VAR_INIT_STATUS_INITIALIZED);
10250 add_loc_descr (&loc_result, t);
10251 size = GET_MODE_SIZE (GET_MODE (XVECEXP (regs, 0, 0)));
10252 add_loc_descr_op_piece (&loc_result, size);
10255 if (loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED)
10256 add_loc_descr (&loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0));
10260 static unsigned long size_of_int_loc_descriptor (HOST_WIDE_INT);
10262 /* Return a location descriptor that designates a constant i,
10263 as a compound operation from constant (i >> shift), constant shift
10266 static dw_loc_descr_ref
10267 int_shift_loc_descriptor (HOST_WIDE_INT i, int shift)
10269 dw_loc_descr_ref ret = int_loc_descriptor (i >> shift);
10270 add_loc_descr (&ret, int_loc_descriptor (shift));
10271 add_loc_descr (&ret, new_loc_descr (DW_OP_shl, 0, 0));
10275 /* Return a location descriptor that designates a constant. */
10277 static dw_loc_descr_ref
10278 int_loc_descriptor (HOST_WIDE_INT i)
10280 enum dwarf_location_atom op;
10282 /* Pick the smallest representation of a constant, rather than just
10283 defaulting to the LEB encoding. */
10286 int clz = clz_hwi (i);
10287 int ctz = ctz_hwi (i);
10289 op = (enum dwarf_location_atom) (DW_OP_lit0 + i);
10290 else if (i <= 0xff)
10291 op = DW_OP_const1u;
10292 else if (i <= 0xffff)
10293 op = DW_OP_const2u;
10294 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 5
10295 && clz + 5 + 255 >= HOST_BITS_PER_WIDE_INT)
10296 /* DW_OP_litX DW_OP_litY DW_OP_shl takes just 3 bytes and
10297 DW_OP_litX DW_OP_const1u Y DW_OP_shl takes just 4 bytes,
10298 while DW_OP_const4u is 5 bytes. */
10299 return int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT - clz - 5);
10300 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 8
10301 && clz + 8 + 31 >= HOST_BITS_PER_WIDE_INT)
10302 /* DW_OP_const1u X DW_OP_litY DW_OP_shl takes just 4 bytes,
10303 while DW_OP_const4u is 5 bytes. */
10304 return int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT - clz - 8);
10305 else if (HOST_BITS_PER_WIDE_INT == 32 || i <= 0xffffffff)
10306 op = DW_OP_const4u;
10307 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 8
10308 && clz + 8 + 255 >= HOST_BITS_PER_WIDE_INT)
10309 /* DW_OP_const1u X DW_OP_const1u Y DW_OP_shl takes just 5 bytes,
10310 while DW_OP_constu of constant >= 0x100000000 takes at least
10312 return int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT - clz - 8);
10313 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 16
10314 && clz + 16 + (size_of_uleb128 (i) > 5 ? 255 : 31)
10315 >= HOST_BITS_PER_WIDE_INT)
10316 /* DW_OP_const2u X DW_OP_litY DW_OP_shl takes just 5 bytes,
10317 DW_OP_const2u X DW_OP_const1u Y DW_OP_shl takes 6 bytes,
10318 while DW_OP_constu takes in this case at least 6 bytes. */
10319 return int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT - clz - 16);
10320 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 32
10321 && clz + 32 + 31 >= HOST_BITS_PER_WIDE_INT
10322 && size_of_uleb128 (i) > 6)
10323 /* DW_OP_const4u X DW_OP_litY DW_OP_shl takes just 7 bytes. */
10324 return int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT - clz - 32);
10331 op = DW_OP_const1s;
10332 else if (i >= -0x8000)
10333 op = DW_OP_const2s;
10334 else if (HOST_BITS_PER_WIDE_INT == 32 || i >= -0x80000000)
10336 if (size_of_int_loc_descriptor (i) < 5)
10338 dw_loc_descr_ref ret = int_loc_descriptor (-i);
10339 add_loc_descr (&ret, new_loc_descr (DW_OP_neg, 0, 0));
10342 op = DW_OP_const4s;
10346 if (size_of_int_loc_descriptor (i)
10347 < (unsigned long) 1 + size_of_sleb128 (i))
10349 dw_loc_descr_ref ret = int_loc_descriptor (-i);
10350 add_loc_descr (&ret, new_loc_descr (DW_OP_neg, 0, 0));
10357 return new_loc_descr (op, i, 0);
10360 /* Return size_of_locs (int_shift_loc_descriptor (i, shift))
10361 without actually allocating it. */
10363 static unsigned long
10364 size_of_int_shift_loc_descriptor (HOST_WIDE_INT i, int shift)
10366 return size_of_int_loc_descriptor (i >> shift)
10367 + size_of_int_loc_descriptor (shift)
10371 /* Return size_of_locs (int_loc_descriptor (i)) without
10372 actually allocating it. */
10374 static unsigned long
10375 size_of_int_loc_descriptor (HOST_WIDE_INT i)
10384 else if (i <= 0xff)
10386 else if (i <= 0xffff)
10390 if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 5
10391 && clz + 5 + 255 >= HOST_BITS_PER_WIDE_INT)
10392 return size_of_int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT
10394 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 8
10395 && clz + 8 + 31 >= HOST_BITS_PER_WIDE_INT)
10396 return size_of_int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT
10398 else if (HOST_BITS_PER_WIDE_INT == 32 || i <= 0xffffffff)
10400 s = size_of_uleb128 ((unsigned HOST_WIDE_INT) i);
10401 if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 8
10402 && clz + 8 + 255 >= HOST_BITS_PER_WIDE_INT)
10403 return size_of_int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT
10405 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 16
10406 && clz + 16 + (s > 5 ? 255 : 31) >= HOST_BITS_PER_WIDE_INT)
10407 return size_of_int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT
10409 else if (clz + ctz >= HOST_BITS_PER_WIDE_INT - 32
10410 && clz + 32 + 31 >= HOST_BITS_PER_WIDE_INT
10412 return size_of_int_shift_loc_descriptor (i, HOST_BITS_PER_WIDE_INT
10421 else if (i >= -0x8000)
10423 else if (HOST_BITS_PER_WIDE_INT == 32 || i >= -0x80000000)
10425 if (-(unsigned HOST_WIDE_INT) i != (unsigned HOST_WIDE_INT) i)
10427 s = size_of_int_loc_descriptor (-i) + 1;
10435 unsigned long r = 1 + size_of_sleb128 (i);
10436 if (-(unsigned HOST_WIDE_INT) i != (unsigned HOST_WIDE_INT) i)
10438 s = size_of_int_loc_descriptor (-i) + 1;
10447 /* Return loc description representing "address" of integer value.
10448 This can appear only as toplevel expression. */
10450 static dw_loc_descr_ref
10451 address_of_int_loc_descriptor (int size, HOST_WIDE_INT i)
10454 dw_loc_descr_ref loc_result = NULL;
10456 if (!(dwarf_version >= 4 || !dwarf_strict))
10459 litsize = size_of_int_loc_descriptor (i);
10460 /* Determine if DW_OP_stack_value or DW_OP_implicit_value
10461 is more compact. For DW_OP_stack_value we need:
10462 litsize + 1 (DW_OP_stack_value)
10463 and for DW_OP_implicit_value:
10464 1 (DW_OP_implicit_value) + 1 (length) + size. */
10465 if ((int) DWARF2_ADDR_SIZE >= size && litsize + 1 <= 1 + 1 + size)
10467 loc_result = int_loc_descriptor (i);
10468 add_loc_descr (&loc_result,
10469 new_loc_descr (DW_OP_stack_value, 0, 0));
10473 loc_result = new_loc_descr (DW_OP_implicit_value,
10475 loc_result->dw_loc_oprnd2.val_class = dw_val_class_const;
10476 loc_result->dw_loc_oprnd2.v.val_int = i;
10480 /* Return a location descriptor that designates a base+offset location. */
10482 static dw_loc_descr_ref
10483 based_loc_descr (rtx reg, HOST_WIDE_INT offset,
10484 enum var_init_status initialized)
10486 unsigned int regno;
10487 dw_loc_descr_ref result;
10488 dw_fde_ref fde = cfun->fde;
10490 /* We only use "frame base" when we're sure we're talking about the
10491 post-prologue local stack frame. We do this by *not* running
10492 register elimination until this point, and recognizing the special
10493 argument pointer and soft frame pointer rtx's. */
10494 if (reg == arg_pointer_rtx || reg == frame_pointer_rtx)
10496 rtx elim = eliminate_regs (reg, VOIDmode, NULL_RTX);
10500 if (GET_CODE (elim) == PLUS)
10502 offset += INTVAL (XEXP (elim, 1));
10503 elim = XEXP (elim, 0);
10505 gcc_assert ((SUPPORTS_STACK_ALIGNMENT
10506 && (elim == hard_frame_pointer_rtx
10507 || elim == stack_pointer_rtx))
10508 || elim == (frame_pointer_needed
10509 ? hard_frame_pointer_rtx
10510 : stack_pointer_rtx));
10512 /* If drap register is used to align stack, use frame
10513 pointer + offset to access stack variables. If stack
10514 is aligned without drap, use stack pointer + offset to
10515 access stack variables. */
10516 if (crtl->stack_realign_tried
10517 && reg == frame_pointer_rtx)
10520 = DWARF_FRAME_REGNUM ((fde && fde->drap_reg != INVALID_REGNUM)
10521 ? HARD_FRAME_POINTER_REGNUM
10523 return new_reg_loc_descr (base_reg, offset);
10526 gcc_assert (frame_pointer_fb_offset_valid);
10527 offset += frame_pointer_fb_offset;
10528 return new_loc_descr (DW_OP_fbreg, offset, 0);
10532 regno = DWARF_FRAME_REGNUM (REGNO (reg));
10534 if (!optimize && fde
10535 && (fde->drap_reg == regno || fde->vdrap_reg == regno))
10537 /* Use cfa+offset to represent the location of arguments passed
10538 on the stack when drap is used to align stack.
10539 Only do this when not optimizing, for optimized code var-tracking
10540 is supposed to track where the arguments live and the register
10541 used as vdrap or drap in some spot might be used for something
10542 else in other part of the routine. */
10543 return new_loc_descr (DW_OP_fbreg, offset, 0);
10547 result = new_loc_descr ((enum dwarf_location_atom) (DW_OP_breg0 + regno),
10550 result = new_loc_descr (DW_OP_bregx, regno, offset);
10552 if (initialized == VAR_INIT_STATUS_UNINITIALIZED)
10553 add_loc_descr (&result, new_loc_descr (DW_OP_GNU_uninit, 0, 0));
10558 /* Return true if this RTL expression describes a base+offset calculation. */
10561 is_based_loc (const_rtx rtl)
10563 return (GET_CODE (rtl) == PLUS
10564 && ((REG_P (XEXP (rtl, 0))
10565 && REGNO (XEXP (rtl, 0)) < FIRST_PSEUDO_REGISTER
10566 && CONST_INT_P (XEXP (rtl, 1)))));
10569 /* Try to handle TLS MEMs, for which mem_loc_descriptor on XEXP (mem, 0)
10572 static dw_loc_descr_ref
10573 tls_mem_loc_descriptor (rtx mem)
10576 dw_loc_descr_ref loc_result;
10578 if (MEM_EXPR (mem) == NULL_TREE || !MEM_OFFSET_KNOWN_P (mem))
10581 base = get_base_address (MEM_EXPR (mem));
10583 || TREE_CODE (base) != VAR_DECL
10584 || !DECL_THREAD_LOCAL_P (base))
10587 loc_result = loc_descriptor_from_tree (MEM_EXPR (mem), 1);
10588 if (loc_result == NULL)
10591 if (MEM_OFFSET (mem))
10592 loc_descr_plus_const (&loc_result, MEM_OFFSET (mem));
10597 /* Output debug info about reason why we failed to expand expression as dwarf
10601 expansion_failed (tree expr, rtx rtl, char const *reason)
10603 if (dump_file && (dump_flags & TDF_DETAILS))
10605 fprintf (dump_file, "Failed to expand as dwarf: ");
10607 print_generic_expr (dump_file, expr, dump_flags);
10610 fprintf (dump_file, "\n");
10611 print_rtl (dump_file, rtl);
10613 fprintf (dump_file, "\nReason: %s\n", reason);
10617 /* Helper function for const_ok_for_output, called either directly
10618 or via for_each_rtx. */
10621 const_ok_for_output_1 (rtx *rtlp, void *data ATTRIBUTE_UNUSED)
10625 if (GET_CODE (rtl) == UNSPEC)
10627 /* If delegitimize_address couldn't do anything with the UNSPEC, assume
10628 we can't express it in the debug info. */
10629 #ifdef ENABLE_CHECKING
10630 /* Don't complain about TLS UNSPECs, those are just too hard to
10632 if (XVECLEN (rtl, 0) != 1
10633 || GET_CODE (XVECEXP (rtl, 0, 0)) != SYMBOL_REF
10634 || SYMBOL_REF_DECL (XVECEXP (rtl, 0, 0)) == NULL
10635 || TREE_CODE (SYMBOL_REF_DECL (XVECEXP (rtl, 0, 0))) != VAR_DECL
10636 || !DECL_THREAD_LOCAL_P (SYMBOL_REF_DECL (XVECEXP (rtl, 0, 0))))
10637 inform (current_function_decl
10638 ? DECL_SOURCE_LOCATION (current_function_decl)
10639 : UNKNOWN_LOCATION,
10640 #if NUM_UNSPEC_VALUES > 0
10641 "non-delegitimized UNSPEC %s (%d) found in variable location",
10642 ((XINT (rtl, 1) >= 0 && XINT (rtl, 1) < NUM_UNSPEC_VALUES)
10643 ? unspec_strings[XINT (rtl, 1)] : "unknown"),
10646 "non-delegitimized UNSPEC %d found in variable location",
10650 expansion_failed (NULL_TREE, rtl,
10651 "UNSPEC hasn't been delegitimized.\n");
10655 if (GET_CODE (rtl) != SYMBOL_REF)
10658 if (CONSTANT_POOL_ADDRESS_P (rtl))
10661 get_pool_constant_mark (rtl, &marked);
10662 /* If all references to this pool constant were optimized away,
10663 it was not output and thus we can't represent it. */
10666 expansion_failed (NULL_TREE, rtl,
10667 "Constant was removed from constant pool.\n");
10672 if (SYMBOL_REF_TLS_MODEL (rtl) != TLS_MODEL_NONE)
10675 /* Avoid references to external symbols in debug info, on several targets
10676 the linker might even refuse to link when linking a shared library,
10677 and in many other cases the relocations for .debug_info/.debug_loc are
10678 dropped, so the address becomes zero anyway. Hidden symbols, guaranteed
10679 to be defined within the same shared library or executable are fine. */
10680 if (SYMBOL_REF_EXTERNAL_P (rtl))
10682 tree decl = SYMBOL_REF_DECL (rtl);
10684 if (decl == NULL || !targetm.binds_local_p (decl))
10686 expansion_failed (NULL_TREE, rtl,
10687 "Symbol not defined in current TU.\n");
10695 /* Return true if constant RTL can be emitted in DW_OP_addr or
10696 DW_AT_const_value. TLS SYMBOL_REFs, external SYMBOL_REFs or
10697 non-marked constant pool SYMBOL_REFs can't be referenced in it. */
10700 const_ok_for_output (rtx rtl)
10702 if (GET_CODE (rtl) == SYMBOL_REF)
10703 return const_ok_for_output_1 (&rtl, NULL) == 0;
10705 if (GET_CODE (rtl) == CONST)
10706 return for_each_rtx (&XEXP (rtl, 0), const_ok_for_output_1, NULL) == 0;
10711 /* Return a reference to DW_TAG_base_type corresponding to MODE and UNSIGNEDP
10712 if possible, NULL otherwise. */
10715 base_type_for_mode (enum machine_mode mode, bool unsignedp)
10717 dw_die_ref type_die;
10718 tree type = lang_hooks.types.type_for_mode (mode, unsignedp);
10722 switch (TREE_CODE (type))
10730 type_die = lookup_type_die (type);
10732 type_die = modified_type_die (type, false, false, comp_unit_die ());
10733 if (type_die == NULL || type_die->die_tag != DW_TAG_base_type)
10738 /* For OP descriptor assumed to be in unsigned MODE, convert it to a unsigned
10739 type matching MODE, or, if MODE is narrower than or as wide as
10740 DWARF2_ADDR_SIZE, untyped. Return NULL if the conversion is not
10743 static dw_loc_descr_ref
10744 convert_descriptor_to_mode (enum machine_mode mode, dw_loc_descr_ref op)
10746 enum machine_mode outer_mode = mode;
10747 dw_die_ref type_die;
10748 dw_loc_descr_ref cvt;
10750 if (GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE)
10752 add_loc_descr (&op, new_loc_descr (DW_OP_GNU_convert, 0, 0));
10755 type_die = base_type_for_mode (outer_mode, 1);
10756 if (type_die == NULL)
10758 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
10759 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
10760 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
10761 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
10762 add_loc_descr (&op, cvt);
10766 /* Return location descriptor for comparison OP with operands OP0 and OP1. */
10768 static dw_loc_descr_ref
10769 compare_loc_descriptor (enum dwarf_location_atom op, dw_loc_descr_ref op0,
10770 dw_loc_descr_ref op1)
10772 dw_loc_descr_ref ret = op0;
10773 add_loc_descr (&ret, op1);
10774 add_loc_descr (&ret, new_loc_descr (op, 0, 0));
10775 if (STORE_FLAG_VALUE != 1)
10777 add_loc_descr (&ret, int_loc_descriptor (STORE_FLAG_VALUE));
10778 add_loc_descr (&ret, new_loc_descr (DW_OP_mul, 0, 0));
10783 /* Return location descriptor for signed comparison OP RTL. */
10785 static dw_loc_descr_ref
10786 scompare_loc_descriptor (enum dwarf_location_atom op, rtx rtl,
10787 enum machine_mode mem_mode)
10789 enum machine_mode op_mode = GET_MODE (XEXP (rtl, 0));
10790 dw_loc_descr_ref op0, op1;
10793 if (op_mode == VOIDmode)
10794 op_mode = GET_MODE (XEXP (rtl, 1));
10795 if (op_mode == VOIDmode)
10799 && (GET_MODE_CLASS (op_mode) != MODE_INT
10800 || GET_MODE_SIZE (op_mode) > DWARF2_ADDR_SIZE))
10803 op0 = mem_loc_descriptor (XEXP (rtl, 0), op_mode, mem_mode,
10804 VAR_INIT_STATUS_INITIALIZED);
10805 op1 = mem_loc_descriptor (XEXP (rtl, 1), op_mode, mem_mode,
10806 VAR_INIT_STATUS_INITIALIZED);
10808 if (op0 == NULL || op1 == NULL)
10811 if (GET_MODE_CLASS (op_mode) != MODE_INT
10812 || GET_MODE_SIZE (op_mode) == DWARF2_ADDR_SIZE)
10813 return compare_loc_descriptor (op, op0, op1);
10815 if (GET_MODE_SIZE (op_mode) > DWARF2_ADDR_SIZE)
10817 dw_die_ref type_die = base_type_for_mode (op_mode, 0);
10818 dw_loc_descr_ref cvt;
10820 if (type_die == NULL)
10822 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
10823 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
10824 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
10825 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
10826 add_loc_descr (&op0, cvt);
10827 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
10828 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
10829 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
10830 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
10831 add_loc_descr (&op1, cvt);
10832 return compare_loc_descriptor (op, op0, op1);
10835 shift = (DWARF2_ADDR_SIZE - GET_MODE_SIZE (op_mode)) * BITS_PER_UNIT;
10836 /* For eq/ne, if the operands are known to be zero-extended,
10837 there is no need to do the fancy shifting up. */
10838 if (op == DW_OP_eq || op == DW_OP_ne)
10840 dw_loc_descr_ref last0, last1;
10841 for (last0 = op0; last0->dw_loc_next != NULL; last0 = last0->dw_loc_next)
10843 for (last1 = op1; last1->dw_loc_next != NULL; last1 = last1->dw_loc_next)
10845 /* deref_size zero extends, and for constants we can check
10846 whether they are zero extended or not. */
10847 if (((last0->dw_loc_opc == DW_OP_deref_size
10848 && last0->dw_loc_oprnd1.v.val_int <= GET_MODE_SIZE (op_mode))
10849 || (CONST_INT_P (XEXP (rtl, 0))
10850 && (unsigned HOST_WIDE_INT) INTVAL (XEXP (rtl, 0))
10851 == (INTVAL (XEXP (rtl, 0)) & GET_MODE_MASK (op_mode))))
10852 && ((last1->dw_loc_opc == DW_OP_deref_size
10853 && last1->dw_loc_oprnd1.v.val_int <= GET_MODE_SIZE (op_mode))
10854 || (CONST_INT_P (XEXP (rtl, 1))
10855 && (unsigned HOST_WIDE_INT) INTVAL (XEXP (rtl, 1))
10856 == (INTVAL (XEXP (rtl, 1)) & GET_MODE_MASK (op_mode)))))
10857 return compare_loc_descriptor (op, op0, op1);
10859 /* EQ/NE comparison against constant in narrower type than
10860 DWARF2_ADDR_SIZE can be performed either as
10861 DW_OP_const1u <shift> DW_OP_shl DW_OP_const* <cst << shift>
10864 DW_OP_const*u <mode_mask> DW_OP_and DW_OP_const* <cst & mode_mask>
10865 DW_OP_{eq,ne}. Pick whatever is shorter. */
10866 if (CONST_INT_P (XEXP (rtl, 1))
10867 && GET_MODE_BITSIZE (op_mode) < HOST_BITS_PER_WIDE_INT
10868 && (size_of_int_loc_descriptor (shift) + 1
10869 + size_of_int_loc_descriptor (INTVAL (XEXP (rtl, 1)) << shift)
10870 >= size_of_int_loc_descriptor (GET_MODE_MASK (op_mode)) + 1
10871 + size_of_int_loc_descriptor (INTVAL (XEXP (rtl, 1))
10872 & GET_MODE_MASK (op_mode))))
10874 add_loc_descr (&op0, int_loc_descriptor (GET_MODE_MASK (op_mode)));
10875 add_loc_descr (&op0, new_loc_descr (DW_OP_and, 0, 0));
10876 op1 = int_loc_descriptor (INTVAL (XEXP (rtl, 1))
10877 & GET_MODE_MASK (op_mode));
10878 return compare_loc_descriptor (op, op0, op1);
10881 add_loc_descr (&op0, int_loc_descriptor (shift));
10882 add_loc_descr (&op0, new_loc_descr (DW_OP_shl, 0, 0));
10883 if (CONST_INT_P (XEXP (rtl, 1)))
10884 op1 = int_loc_descriptor (INTVAL (XEXP (rtl, 1)) << shift);
10887 add_loc_descr (&op1, int_loc_descriptor (shift));
10888 add_loc_descr (&op1, new_loc_descr (DW_OP_shl, 0, 0));
10890 return compare_loc_descriptor (op, op0, op1);
10893 /* Return location descriptor for unsigned comparison OP RTL. */
10895 static dw_loc_descr_ref
10896 ucompare_loc_descriptor (enum dwarf_location_atom op, rtx rtl,
10897 enum machine_mode mem_mode)
10899 enum machine_mode op_mode = GET_MODE (XEXP (rtl, 0));
10900 dw_loc_descr_ref op0, op1;
10902 if (op_mode == VOIDmode)
10903 op_mode = GET_MODE (XEXP (rtl, 1));
10904 if (op_mode == VOIDmode)
10906 if (GET_MODE_CLASS (op_mode) != MODE_INT)
10909 if (dwarf_strict && GET_MODE_SIZE (op_mode) > DWARF2_ADDR_SIZE)
10912 op0 = mem_loc_descriptor (XEXP (rtl, 0), op_mode, mem_mode,
10913 VAR_INIT_STATUS_INITIALIZED);
10914 op1 = mem_loc_descriptor (XEXP (rtl, 1), op_mode, mem_mode,
10915 VAR_INIT_STATUS_INITIALIZED);
10917 if (op0 == NULL || op1 == NULL)
10920 if (GET_MODE_SIZE (op_mode) < DWARF2_ADDR_SIZE)
10922 HOST_WIDE_INT mask = GET_MODE_MASK (op_mode);
10923 dw_loc_descr_ref last0, last1;
10924 for (last0 = op0; last0->dw_loc_next != NULL; last0 = last0->dw_loc_next)
10926 for (last1 = op1; last1->dw_loc_next != NULL; last1 = last1->dw_loc_next)
10928 if (CONST_INT_P (XEXP (rtl, 0)))
10929 op0 = int_loc_descriptor (INTVAL (XEXP (rtl, 0)) & mask);
10930 /* deref_size zero extends, so no need to mask it again. */
10931 else if (last0->dw_loc_opc != DW_OP_deref_size
10932 || last0->dw_loc_oprnd1.v.val_int > GET_MODE_SIZE (op_mode))
10934 add_loc_descr (&op0, int_loc_descriptor (mask));
10935 add_loc_descr (&op0, new_loc_descr (DW_OP_and, 0, 0));
10937 if (CONST_INT_P (XEXP (rtl, 1)))
10938 op1 = int_loc_descriptor (INTVAL (XEXP (rtl, 1)) & mask);
10939 /* deref_size zero extends, so no need to mask it again. */
10940 else if (last1->dw_loc_opc != DW_OP_deref_size
10941 || last1->dw_loc_oprnd1.v.val_int > GET_MODE_SIZE (op_mode))
10943 add_loc_descr (&op1, int_loc_descriptor (mask));
10944 add_loc_descr (&op1, new_loc_descr (DW_OP_and, 0, 0));
10947 else if (GET_MODE_SIZE (op_mode) == DWARF2_ADDR_SIZE)
10949 HOST_WIDE_INT bias = 1;
10950 bias <<= (DWARF2_ADDR_SIZE * BITS_PER_UNIT - 1);
10951 add_loc_descr (&op0, new_loc_descr (DW_OP_plus_uconst, bias, 0));
10952 if (CONST_INT_P (XEXP (rtl, 1)))
10953 op1 = int_loc_descriptor ((unsigned HOST_WIDE_INT) bias
10954 + INTVAL (XEXP (rtl, 1)));
10956 add_loc_descr (&op1, new_loc_descr (DW_OP_plus_uconst,
10959 return compare_loc_descriptor (op, op0, op1);
10962 /* Return location descriptor for {U,S}{MIN,MAX}. */
10964 static dw_loc_descr_ref
10965 minmax_loc_descriptor (rtx rtl, enum machine_mode mode,
10966 enum machine_mode mem_mode)
10968 enum dwarf_location_atom op;
10969 dw_loc_descr_ref op0, op1, ret;
10970 dw_loc_descr_ref bra_node, drop_node;
10973 && (GET_MODE_CLASS (mode) != MODE_INT
10974 || GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE))
10977 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
10978 VAR_INIT_STATUS_INITIALIZED);
10979 op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
10980 VAR_INIT_STATUS_INITIALIZED);
10982 if (op0 == NULL || op1 == NULL)
10985 add_loc_descr (&op0, new_loc_descr (DW_OP_dup, 0, 0));
10986 add_loc_descr (&op1, new_loc_descr (DW_OP_swap, 0, 0));
10987 add_loc_descr (&op1, new_loc_descr (DW_OP_over, 0, 0));
10988 if (GET_CODE (rtl) == UMIN || GET_CODE (rtl) == UMAX)
10990 if (GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE)
10992 HOST_WIDE_INT mask = GET_MODE_MASK (mode);
10993 add_loc_descr (&op0, int_loc_descriptor (mask));
10994 add_loc_descr (&op0, new_loc_descr (DW_OP_and, 0, 0));
10995 add_loc_descr (&op1, int_loc_descriptor (mask));
10996 add_loc_descr (&op1, new_loc_descr (DW_OP_and, 0, 0));
10998 else if (GET_MODE_SIZE (mode) == DWARF2_ADDR_SIZE)
11000 HOST_WIDE_INT bias = 1;
11001 bias <<= (DWARF2_ADDR_SIZE * BITS_PER_UNIT - 1);
11002 add_loc_descr (&op0, new_loc_descr (DW_OP_plus_uconst, bias, 0));
11003 add_loc_descr (&op1, new_loc_descr (DW_OP_plus_uconst, bias, 0));
11006 else if (GET_MODE_CLASS (mode) == MODE_INT
11007 && GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE)
11009 int shift = (DWARF2_ADDR_SIZE - GET_MODE_SIZE (mode)) * BITS_PER_UNIT;
11010 add_loc_descr (&op0, int_loc_descriptor (shift));
11011 add_loc_descr (&op0, new_loc_descr (DW_OP_shl, 0, 0));
11012 add_loc_descr (&op1, int_loc_descriptor (shift));
11013 add_loc_descr (&op1, new_loc_descr (DW_OP_shl, 0, 0));
11015 else if (GET_MODE_CLASS (mode) == MODE_INT
11016 && GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE)
11018 dw_die_ref type_die = base_type_for_mode (mode, 0);
11019 dw_loc_descr_ref cvt;
11020 if (type_die == NULL)
11022 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11023 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11024 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
11025 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11026 add_loc_descr (&op0, cvt);
11027 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11028 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11029 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
11030 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11031 add_loc_descr (&op1, cvt);
11034 if (GET_CODE (rtl) == SMIN || GET_CODE (rtl) == UMIN)
11039 add_loc_descr (&ret, op1);
11040 add_loc_descr (&ret, new_loc_descr (op, 0, 0));
11041 bra_node = new_loc_descr (DW_OP_bra, 0, 0);
11042 add_loc_descr (&ret, bra_node);
11043 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11044 drop_node = new_loc_descr (DW_OP_drop, 0, 0);
11045 add_loc_descr (&ret, drop_node);
11046 bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc;
11047 bra_node->dw_loc_oprnd1.v.val_loc = drop_node;
11048 if ((GET_CODE (rtl) == SMIN || GET_CODE (rtl) == SMAX)
11049 && GET_MODE_CLASS (mode) == MODE_INT
11050 && GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE)
11051 ret = convert_descriptor_to_mode (mode, ret);
11055 /* Helper function for mem_loc_descriptor. Perform OP binary op,
11056 but after converting arguments to type_die, afterwards
11057 convert back to unsigned. */
11059 static dw_loc_descr_ref
11060 typed_binop (enum dwarf_location_atom op, rtx rtl, dw_die_ref type_die,
11061 enum machine_mode mode, enum machine_mode mem_mode)
11063 dw_loc_descr_ref cvt, op0, op1;
11065 if (type_die == NULL)
11067 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11068 VAR_INIT_STATUS_INITIALIZED);
11069 op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
11070 VAR_INIT_STATUS_INITIALIZED);
11071 if (op0 == NULL || op1 == NULL)
11073 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11074 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11075 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
11076 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11077 add_loc_descr (&op0, cvt);
11078 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11079 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11080 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
11081 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11082 add_loc_descr (&op1, cvt);
11083 add_loc_descr (&op0, op1);
11084 add_loc_descr (&op0, new_loc_descr (op, 0, 0));
11085 return convert_descriptor_to_mode (mode, op0);
11088 /* CLZ (where constV is CLZ_DEFINED_VALUE_AT_ZERO computed value,
11089 const0 is DW_OP_lit0 or corresponding typed constant,
11090 const1 is DW_OP_lit1 or corresponding typed constant
11091 and constMSB is constant with just the MSB bit set
11093 DW_OP_dup DW_OP_bra <L1> DW_OP_drop constV DW_OP_skip <L4>
11094 L1: const0 DW_OP_swap
11095 L2: DW_OP_dup constMSB DW_OP_and DW_OP_bra <L3> const1 DW_OP_shl
11096 DW_OP_swap DW_OP_plus_uconst <1> DW_OP_swap DW_OP_skip <L2>
11101 DW_OP_dup DW_OP_bra <L1> DW_OP_drop constV DW_OP_skip <L4>
11102 L1: const0 DW_OP_swap
11103 L2: DW_OP_dup const1 DW_OP_and DW_OP_bra <L3> const1 DW_OP_shr
11104 DW_OP_swap DW_OP_plus_uconst <1> DW_OP_swap DW_OP_skip <L2>
11109 DW_OP_dup DW_OP_bra <L1> DW_OP_drop const0 DW_OP_skip <L4>
11110 L1: const1 DW_OP_swap
11111 L2: DW_OP_dup const1 DW_OP_and DW_OP_bra <L3> const1 DW_OP_shr
11112 DW_OP_swap DW_OP_plus_uconst <1> DW_OP_swap DW_OP_skip <L2>
11116 static dw_loc_descr_ref
11117 clz_loc_descriptor (rtx rtl, enum machine_mode mode,
11118 enum machine_mode mem_mode)
11120 dw_loc_descr_ref op0, ret, tmp;
11121 HOST_WIDE_INT valv;
11122 dw_loc_descr_ref l1jump, l1label;
11123 dw_loc_descr_ref l2jump, l2label;
11124 dw_loc_descr_ref l3jump, l3label;
11125 dw_loc_descr_ref l4jump, l4label;
11128 if (GET_MODE_CLASS (mode) != MODE_INT
11129 || GET_MODE (XEXP (rtl, 0)) != mode
11130 || (GET_CODE (rtl) == CLZ
11131 && GET_MODE_BITSIZE (mode) > 2 * HOST_BITS_PER_WIDE_INT))
11134 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11135 VAR_INIT_STATUS_INITIALIZED);
11139 if (GET_CODE (rtl) == CLZ)
11141 if (!CLZ_DEFINED_VALUE_AT_ZERO (mode, valv))
11142 valv = GET_MODE_BITSIZE (mode);
11144 else if (GET_CODE (rtl) == FFS)
11146 else if (!CTZ_DEFINED_VALUE_AT_ZERO (mode, valv))
11147 valv = GET_MODE_BITSIZE (mode);
11148 add_loc_descr (&ret, new_loc_descr (DW_OP_dup, 0, 0));
11149 l1jump = new_loc_descr (DW_OP_bra, 0, 0);
11150 add_loc_descr (&ret, l1jump);
11151 add_loc_descr (&ret, new_loc_descr (DW_OP_drop, 0, 0));
11152 tmp = mem_loc_descriptor (GEN_INT (valv), mode, mem_mode,
11153 VAR_INIT_STATUS_INITIALIZED);
11156 add_loc_descr (&ret, tmp);
11157 l4jump = new_loc_descr (DW_OP_skip, 0, 0);
11158 add_loc_descr (&ret, l4jump);
11159 l1label = mem_loc_descriptor (GET_CODE (rtl) == FFS
11160 ? const1_rtx : const0_rtx,
11162 VAR_INIT_STATUS_INITIALIZED);
11163 if (l1label == NULL)
11165 add_loc_descr (&ret, l1label);
11166 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11167 l2label = new_loc_descr (DW_OP_dup, 0, 0);
11168 add_loc_descr (&ret, l2label);
11169 if (GET_CODE (rtl) != CLZ)
11171 else if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT)
11172 msb = GEN_INT ((unsigned HOST_WIDE_INT) 1
11173 << (GET_MODE_BITSIZE (mode) - 1));
11175 msb = immed_double_const (0, (unsigned HOST_WIDE_INT) 1
11176 << (GET_MODE_BITSIZE (mode)
11177 - HOST_BITS_PER_WIDE_INT - 1), mode);
11178 if (GET_CODE (msb) == CONST_INT && INTVAL (msb) < 0)
11179 tmp = new_loc_descr (HOST_BITS_PER_WIDE_INT == 32
11180 ? DW_OP_const4u : HOST_BITS_PER_WIDE_INT == 64
11181 ? DW_OP_const8u : DW_OP_constu, INTVAL (msb), 0);
11183 tmp = mem_loc_descriptor (msb, mode, mem_mode,
11184 VAR_INIT_STATUS_INITIALIZED);
11187 add_loc_descr (&ret, tmp);
11188 add_loc_descr (&ret, new_loc_descr (DW_OP_and, 0, 0));
11189 l3jump = new_loc_descr (DW_OP_bra, 0, 0);
11190 add_loc_descr (&ret, l3jump);
11191 tmp = mem_loc_descriptor (const1_rtx, mode, mem_mode,
11192 VAR_INIT_STATUS_INITIALIZED);
11195 add_loc_descr (&ret, tmp);
11196 add_loc_descr (&ret, new_loc_descr (GET_CODE (rtl) == CLZ
11197 ? DW_OP_shl : DW_OP_shr, 0, 0));
11198 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11199 add_loc_descr (&ret, new_loc_descr (DW_OP_plus_uconst, 1, 0));
11200 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11201 l2jump = new_loc_descr (DW_OP_skip, 0, 0);
11202 add_loc_descr (&ret, l2jump);
11203 l3label = new_loc_descr (DW_OP_drop, 0, 0);
11204 add_loc_descr (&ret, l3label);
11205 l4label = new_loc_descr (DW_OP_nop, 0, 0);
11206 add_loc_descr (&ret, l4label);
11207 l1jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11208 l1jump->dw_loc_oprnd1.v.val_loc = l1label;
11209 l2jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11210 l2jump->dw_loc_oprnd1.v.val_loc = l2label;
11211 l3jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11212 l3jump->dw_loc_oprnd1.v.val_loc = l3label;
11213 l4jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11214 l4jump->dw_loc_oprnd1.v.val_loc = l4label;
11218 /* POPCOUNT (const0 is DW_OP_lit0 or corresponding typed constant,
11219 const1 is DW_OP_lit1 or corresponding typed constant):
11221 L1: DW_OP_dup DW_OP_bra <L2> DW_OP_dup DW_OP_rot const1 DW_OP_and
11222 DW_OP_plus DW_OP_swap const1 DW_OP_shr DW_OP_skip <L1>
11226 L1: DW_OP_dup DW_OP_bra <L2> DW_OP_dup DW_OP_rot const1 DW_OP_and
11227 DW_OP_xor DW_OP_swap const1 DW_OP_shr DW_OP_skip <L1>
11230 static dw_loc_descr_ref
11231 popcount_loc_descriptor (rtx rtl, enum machine_mode mode,
11232 enum machine_mode mem_mode)
11234 dw_loc_descr_ref op0, ret, tmp;
11235 dw_loc_descr_ref l1jump, l1label;
11236 dw_loc_descr_ref l2jump, l2label;
11238 if (GET_MODE_CLASS (mode) != MODE_INT
11239 || GET_MODE (XEXP (rtl, 0)) != mode)
11242 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11243 VAR_INIT_STATUS_INITIALIZED);
11247 tmp = mem_loc_descriptor (const0_rtx, mode, mem_mode,
11248 VAR_INIT_STATUS_INITIALIZED);
11251 add_loc_descr (&ret, tmp);
11252 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11253 l1label = new_loc_descr (DW_OP_dup, 0, 0);
11254 add_loc_descr (&ret, l1label);
11255 l2jump = new_loc_descr (DW_OP_bra, 0, 0);
11256 add_loc_descr (&ret, l2jump);
11257 add_loc_descr (&ret, new_loc_descr (DW_OP_dup, 0, 0));
11258 add_loc_descr (&ret, new_loc_descr (DW_OP_rot, 0, 0));
11259 tmp = mem_loc_descriptor (const1_rtx, mode, mem_mode,
11260 VAR_INIT_STATUS_INITIALIZED);
11263 add_loc_descr (&ret, tmp);
11264 add_loc_descr (&ret, new_loc_descr (DW_OP_and, 0, 0));
11265 add_loc_descr (&ret, new_loc_descr (GET_CODE (rtl) == POPCOUNT
11266 ? DW_OP_plus : DW_OP_xor, 0, 0));
11267 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11268 tmp = mem_loc_descriptor (const1_rtx, mode, mem_mode,
11269 VAR_INIT_STATUS_INITIALIZED);
11270 add_loc_descr (&ret, tmp);
11271 add_loc_descr (&ret, new_loc_descr (DW_OP_shr, 0, 0));
11272 l1jump = new_loc_descr (DW_OP_skip, 0, 0);
11273 add_loc_descr (&ret, l1jump);
11274 l2label = new_loc_descr (DW_OP_drop, 0, 0);
11275 add_loc_descr (&ret, l2label);
11276 l1jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11277 l1jump->dw_loc_oprnd1.v.val_loc = l1label;
11278 l2jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11279 l2jump->dw_loc_oprnd1.v.val_loc = l2label;
11283 /* BSWAP (constS is initial shift count, either 56 or 24):
11285 L1: DW_OP_pick <2> constS DW_OP_pick <3> DW_OP_minus DW_OP_shr
11286 const255 DW_OP_and DW_OP_pick <2> DW_OP_shl DW_OP_or
11287 DW_OP_swap DW_OP_dup const0 DW_OP_eq DW_OP_bra <L2> const8
11288 DW_OP_minus DW_OP_swap DW_OP_skip <L1>
11289 L2: DW_OP_drop DW_OP_swap DW_OP_drop */
11291 static dw_loc_descr_ref
11292 bswap_loc_descriptor (rtx rtl, enum machine_mode mode,
11293 enum machine_mode mem_mode)
11295 dw_loc_descr_ref op0, ret, tmp;
11296 dw_loc_descr_ref l1jump, l1label;
11297 dw_loc_descr_ref l2jump, l2label;
11299 if (GET_MODE_CLASS (mode) != MODE_INT
11300 || BITS_PER_UNIT != 8
11301 || (GET_MODE_BITSIZE (mode) != 32
11302 && GET_MODE_BITSIZE (mode) != 64))
11305 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11306 VAR_INIT_STATUS_INITIALIZED);
11311 tmp = mem_loc_descriptor (GEN_INT (GET_MODE_BITSIZE (mode) - 8),
11313 VAR_INIT_STATUS_INITIALIZED);
11316 add_loc_descr (&ret, tmp);
11317 tmp = mem_loc_descriptor (const0_rtx, mode, mem_mode,
11318 VAR_INIT_STATUS_INITIALIZED);
11321 add_loc_descr (&ret, tmp);
11322 l1label = new_loc_descr (DW_OP_pick, 2, 0);
11323 add_loc_descr (&ret, l1label);
11324 tmp = mem_loc_descriptor (GEN_INT (GET_MODE_BITSIZE (mode) - 8),
11326 VAR_INIT_STATUS_INITIALIZED);
11327 add_loc_descr (&ret, tmp);
11328 add_loc_descr (&ret, new_loc_descr (DW_OP_pick, 3, 0));
11329 add_loc_descr (&ret, new_loc_descr (DW_OP_minus, 0, 0));
11330 add_loc_descr (&ret, new_loc_descr (DW_OP_shr, 0, 0));
11331 tmp = mem_loc_descriptor (GEN_INT (255), mode, mem_mode,
11332 VAR_INIT_STATUS_INITIALIZED);
11335 add_loc_descr (&ret, tmp);
11336 add_loc_descr (&ret, new_loc_descr (DW_OP_and, 0, 0));
11337 add_loc_descr (&ret, new_loc_descr (DW_OP_pick, 2, 0));
11338 add_loc_descr (&ret, new_loc_descr (DW_OP_shl, 0, 0));
11339 add_loc_descr (&ret, new_loc_descr (DW_OP_or, 0, 0));
11340 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11341 add_loc_descr (&ret, new_loc_descr (DW_OP_dup, 0, 0));
11342 tmp = mem_loc_descriptor (const0_rtx, mode, mem_mode,
11343 VAR_INIT_STATUS_INITIALIZED);
11344 add_loc_descr (&ret, tmp);
11345 add_loc_descr (&ret, new_loc_descr (DW_OP_eq, 0, 0));
11346 l2jump = new_loc_descr (DW_OP_bra, 0, 0);
11347 add_loc_descr (&ret, l2jump);
11348 tmp = mem_loc_descriptor (GEN_INT (8), mode, mem_mode,
11349 VAR_INIT_STATUS_INITIALIZED);
11350 add_loc_descr (&ret, tmp);
11351 add_loc_descr (&ret, new_loc_descr (DW_OP_minus, 0, 0));
11352 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11353 l1jump = new_loc_descr (DW_OP_skip, 0, 0);
11354 add_loc_descr (&ret, l1jump);
11355 l2label = new_loc_descr (DW_OP_drop, 0, 0);
11356 add_loc_descr (&ret, l2label);
11357 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11358 add_loc_descr (&ret, new_loc_descr (DW_OP_drop, 0, 0));
11359 l1jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11360 l1jump->dw_loc_oprnd1.v.val_loc = l1label;
11361 l2jump->dw_loc_oprnd1.val_class = dw_val_class_loc;
11362 l2jump->dw_loc_oprnd1.v.val_loc = l2label;
11366 /* ROTATE (constMASK is mode mask, BITSIZE is bitsize of mode):
11367 DW_OP_over DW_OP_over DW_OP_shl [ constMASK DW_OP_and ] DW_OP_rot
11368 [ DW_OP_swap constMASK DW_OP_and DW_OP_swap ] DW_OP_neg
11369 DW_OP_plus_uconst <BITSIZE> DW_OP_shr DW_OP_or
11371 ROTATERT is similar:
11372 DW_OP_over DW_OP_over DW_OP_neg DW_OP_plus_uconst <BITSIZE>
11373 DW_OP_shl [ constMASK DW_OP_and ] DW_OP_rot
11374 [ DW_OP_swap constMASK DW_OP_and DW_OP_swap ] DW_OP_shr DW_OP_or */
11376 static dw_loc_descr_ref
11377 rotate_loc_descriptor (rtx rtl, enum machine_mode mode,
11378 enum machine_mode mem_mode)
11380 rtx rtlop1 = XEXP (rtl, 1);
11381 dw_loc_descr_ref op0, op1, ret, mask[2] = { NULL, NULL };
11384 if (GET_MODE_CLASS (mode) != MODE_INT)
11387 if (GET_MODE (rtlop1) != VOIDmode
11388 && GET_MODE_BITSIZE (GET_MODE (rtlop1)) < GET_MODE_BITSIZE (mode))
11389 rtlop1 = gen_rtx_ZERO_EXTEND (mode, rtlop1);
11390 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11391 VAR_INIT_STATUS_INITIALIZED);
11392 op1 = mem_loc_descriptor (rtlop1, mode, mem_mode,
11393 VAR_INIT_STATUS_INITIALIZED);
11394 if (op0 == NULL || op1 == NULL)
11396 if (GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE)
11397 for (i = 0; i < 2; i++)
11399 if (GET_MODE_BITSIZE (mode) < HOST_BITS_PER_WIDE_INT)
11400 mask[i] = mem_loc_descriptor (GEN_INT (GET_MODE_MASK (mode)),
11402 VAR_INIT_STATUS_INITIALIZED);
11403 else if (GET_MODE_BITSIZE (mode) == HOST_BITS_PER_WIDE_INT)
11404 mask[i] = new_loc_descr (HOST_BITS_PER_WIDE_INT == 32
11406 : HOST_BITS_PER_WIDE_INT == 64
11407 ? DW_OP_const8u : DW_OP_constu,
11408 GET_MODE_MASK (mode), 0);
11411 if (mask[i] == NULL)
11413 add_loc_descr (&mask[i], new_loc_descr (DW_OP_and, 0, 0));
11416 add_loc_descr (&ret, op1);
11417 add_loc_descr (&ret, new_loc_descr (DW_OP_over, 0, 0));
11418 add_loc_descr (&ret, new_loc_descr (DW_OP_over, 0, 0));
11419 if (GET_CODE (rtl) == ROTATERT)
11421 add_loc_descr (&ret, new_loc_descr (DW_OP_neg, 0, 0));
11422 add_loc_descr (&ret, new_loc_descr (DW_OP_plus_uconst,
11423 GET_MODE_BITSIZE (mode), 0));
11425 add_loc_descr (&ret, new_loc_descr (DW_OP_shl, 0, 0));
11426 if (mask[0] != NULL)
11427 add_loc_descr (&ret, mask[0]);
11428 add_loc_descr (&ret, new_loc_descr (DW_OP_rot, 0, 0));
11429 if (mask[1] != NULL)
11431 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11432 add_loc_descr (&ret, mask[1]);
11433 add_loc_descr (&ret, new_loc_descr (DW_OP_swap, 0, 0));
11435 if (GET_CODE (rtl) == ROTATE)
11437 add_loc_descr (&ret, new_loc_descr (DW_OP_neg, 0, 0));
11438 add_loc_descr (&ret, new_loc_descr (DW_OP_plus_uconst,
11439 GET_MODE_BITSIZE (mode), 0));
11441 add_loc_descr (&ret, new_loc_descr (DW_OP_shr, 0, 0));
11442 add_loc_descr (&ret, new_loc_descr (DW_OP_or, 0, 0));
11446 /* Helper function for mem_loc_descriptor. Return DW_OP_GNU_parameter_ref
11447 for DEBUG_PARAMETER_REF RTL. */
11449 static dw_loc_descr_ref
11450 parameter_ref_descriptor (rtx rtl)
11452 dw_loc_descr_ref ret;
11457 gcc_assert (TREE_CODE (DEBUG_PARAMETER_REF_DECL (rtl)) == PARM_DECL);
11458 ref = lookup_decl_die (DEBUG_PARAMETER_REF_DECL (rtl));
11459 ret = new_loc_descr (DW_OP_GNU_parameter_ref, 0, 0);
11462 ret->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11463 ret->dw_loc_oprnd1.v.val_die_ref.die = ref;
11464 ret->dw_loc_oprnd1.v.val_die_ref.external = 0;
11468 ret->dw_loc_oprnd1.val_class = dw_val_class_decl_ref;
11469 ret->dw_loc_oprnd1.v.val_decl_ref = DEBUG_PARAMETER_REF_DECL (rtl);
11474 /* Helper function to get mode of MEM's address. */
11477 get_address_mode (rtx mem)
11479 enum machine_mode mode = GET_MODE (XEXP (mem, 0));
11480 if (mode != VOIDmode)
11482 return targetm.addr_space.address_mode (MEM_ADDR_SPACE (mem));
11485 /* The following routine converts the RTL for a variable or parameter
11486 (resident in memory) into an equivalent Dwarf representation of a
11487 mechanism for getting the address of that same variable onto the top of a
11488 hypothetical "address evaluation" stack.
11490 When creating memory location descriptors, we are effectively transforming
11491 the RTL for a memory-resident object into its Dwarf postfix expression
11492 equivalent. This routine recursively descends an RTL tree, turning
11493 it into Dwarf postfix code as it goes.
11495 MODE is the mode that should be assumed for the rtl if it is VOIDmode.
11497 MEM_MODE is the mode of the memory reference, needed to handle some
11498 autoincrement addressing modes.
11500 Return 0 if we can't represent the location. */
11503 mem_loc_descriptor (rtx rtl, enum machine_mode mode,
11504 enum machine_mode mem_mode,
11505 enum var_init_status initialized)
11507 dw_loc_descr_ref mem_loc_result = NULL;
11508 enum dwarf_location_atom op;
11509 dw_loc_descr_ref op0, op1;
11511 if (mode == VOIDmode)
11512 mode = GET_MODE (rtl);
11514 /* Note that for a dynamically sized array, the location we will generate a
11515 description of here will be the lowest numbered location which is
11516 actually within the array. That's *not* necessarily the same as the
11517 zeroth element of the array. */
11519 rtl = targetm.delegitimize_address (rtl);
11521 if (mode != GET_MODE (rtl) && GET_MODE (rtl) != VOIDmode)
11524 switch (GET_CODE (rtl))
11529 return mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode, initialized);
11532 /* The case of a subreg may arise when we have a local (register)
11533 variable or a formal (register) parameter which doesn't quite fill
11534 up an entire register. For now, just assume that it is
11535 legitimate to make the Dwarf info refer to the whole register which
11536 contains the given subreg. */
11537 if (!subreg_lowpart_p (rtl))
11539 if (GET_MODE_CLASS (mode) == MODE_INT
11540 && GET_MODE_CLASS (GET_MODE (SUBREG_REG (rtl))) == MODE_INT
11541 && (GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
11542 #ifdef POINTERS_EXTEND_UNSIGNED
11543 || (mode == Pmode && mem_mode != VOIDmode)
11546 && GET_MODE_SIZE (GET_MODE (SUBREG_REG (rtl))) <= DWARF2_ADDR_SIZE)
11548 mem_loc_result = mem_loc_descriptor (SUBREG_REG (rtl),
11549 GET_MODE (SUBREG_REG (rtl)),
11550 mem_mode, initialized);
11555 if (GET_MODE_SIZE (mode) > GET_MODE_SIZE (GET_MODE (SUBREG_REG (rtl))))
11557 if (GET_MODE_SIZE (mode) != GET_MODE_SIZE (GET_MODE (SUBREG_REG (rtl)))
11558 && (GET_MODE_CLASS (mode) != MODE_INT
11559 || GET_MODE_CLASS (GET_MODE (SUBREG_REG (rtl))) != MODE_INT))
11563 dw_die_ref type_die;
11564 dw_loc_descr_ref cvt;
11566 mem_loc_result = mem_loc_descriptor (SUBREG_REG (rtl),
11567 GET_MODE (SUBREG_REG (rtl)),
11568 mem_mode, initialized);
11569 if (mem_loc_result == NULL)
11571 type_die = base_type_for_mode (mode,
11572 GET_MODE_CLASS (mode) == MODE_INT);
11573 if (type_die == NULL)
11575 mem_loc_result = NULL;
11578 if (GET_MODE_SIZE (mode)
11579 != GET_MODE_SIZE (GET_MODE (SUBREG_REG (rtl))))
11580 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11582 cvt = new_loc_descr (DW_OP_GNU_reinterpret, 0, 0);
11583 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11584 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
11585 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11586 add_loc_descr (&mem_loc_result, cvt);
11591 if (GET_MODE_CLASS (mode) != MODE_INT
11592 || (GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE
11593 #ifdef POINTERS_EXTEND_UNSIGNED
11594 && (mode != Pmode || mem_mode == VOIDmode)
11598 dw_die_ref type_die;
11602 if (REGNO (rtl) > FIRST_PSEUDO_REGISTER)
11604 type_die = base_type_for_mode (mode,
11605 GET_MODE_CLASS (mode) == MODE_INT);
11606 if (type_die == NULL)
11608 mem_loc_result = new_loc_descr (DW_OP_GNU_regval_type,
11609 dbx_reg_number (rtl), 0);
11610 mem_loc_result->dw_loc_oprnd2.val_class = dw_val_class_die_ref;
11611 mem_loc_result->dw_loc_oprnd2.v.val_die_ref.die = type_die;
11612 mem_loc_result->dw_loc_oprnd2.v.val_die_ref.external = 0;
11615 /* Whenever a register number forms a part of the description of the
11616 method for calculating the (dynamic) address of a memory resident
11617 object, DWARF rules require the register number be referred to as
11618 a "base register". This distinction is not based in any way upon
11619 what category of register the hardware believes the given register
11620 belongs to. This is strictly DWARF terminology we're dealing with
11621 here. Note that in cases where the location of a memory-resident
11622 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
11623 OP_CONST (0)) the actual DWARF location descriptor that we generate
11624 may just be OP_BASEREG (basereg). This may look deceptively like
11625 the object in question was allocated to a register (rather than in
11626 memory) so DWARF consumers need to be aware of the subtle
11627 distinction between OP_REG and OP_BASEREG. */
11628 if (REGNO (rtl) < FIRST_PSEUDO_REGISTER)
11629 mem_loc_result = based_loc_descr (rtl, 0, VAR_INIT_STATUS_INITIALIZED);
11630 else if (stack_realign_drap
11632 && crtl->args.internal_arg_pointer == rtl
11633 && REGNO (crtl->drap_reg) < FIRST_PSEUDO_REGISTER)
11635 /* If RTL is internal_arg_pointer, which has been optimized
11636 out, use DRAP instead. */
11637 mem_loc_result = based_loc_descr (crtl->drap_reg, 0,
11638 VAR_INIT_STATUS_INITIALIZED);
11644 if (GET_MODE_CLASS (mode) != MODE_INT)
11646 op0 = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (XEXP (rtl, 0)),
11647 mem_mode, VAR_INIT_STATUS_INITIALIZED);
11650 else if (GET_CODE (rtl) == ZERO_EXTEND
11651 && GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
11652 && GET_MODE_BITSIZE (GET_MODE (XEXP (rtl, 0)))
11653 < HOST_BITS_PER_WIDE_INT
11654 /* If DW_OP_const{1,2,4}u won't be used, it is shorter
11655 to expand zero extend as two shifts instead of
11657 && GET_MODE_SIZE (GET_MODE (XEXP (rtl, 0))) <= 4)
11659 enum machine_mode imode = GET_MODE (XEXP (rtl, 0));
11660 mem_loc_result = op0;
11661 add_loc_descr (&mem_loc_result,
11662 int_loc_descriptor (GET_MODE_MASK (imode)));
11663 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_and, 0, 0));
11665 else if (GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE)
11667 int shift = DWARF2_ADDR_SIZE
11668 - GET_MODE_SIZE (GET_MODE (XEXP (rtl, 0)));
11669 shift *= BITS_PER_UNIT;
11670 if (GET_CODE (rtl) == SIGN_EXTEND)
11674 mem_loc_result = op0;
11675 add_loc_descr (&mem_loc_result, int_loc_descriptor (shift));
11676 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_shl, 0, 0));
11677 add_loc_descr (&mem_loc_result, int_loc_descriptor (shift));
11678 add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0));
11680 else if (!dwarf_strict)
11682 dw_die_ref type_die1, type_die2;
11683 dw_loc_descr_ref cvt;
11685 type_die1 = base_type_for_mode (GET_MODE (XEXP (rtl, 0)),
11686 GET_CODE (rtl) == ZERO_EXTEND);
11687 if (type_die1 == NULL)
11689 type_die2 = base_type_for_mode (mode, 1);
11690 if (type_die2 == NULL)
11692 mem_loc_result = op0;
11693 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11694 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11695 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die1;
11696 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11697 add_loc_descr (&mem_loc_result, cvt);
11698 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
11699 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
11700 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die2;
11701 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
11702 add_loc_descr (&mem_loc_result, cvt);
11708 rtx new_rtl = avoid_constant_pool_reference (rtl);
11709 if (new_rtl != rtl)
11711 mem_loc_result = mem_loc_descriptor (new_rtl, mode, mem_mode,
11713 if (mem_loc_result != NULL)
11714 return mem_loc_result;
11717 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0),
11718 get_address_mode (rtl), mode,
11719 VAR_INIT_STATUS_INITIALIZED);
11720 if (mem_loc_result == NULL)
11721 mem_loc_result = tls_mem_loc_descriptor (rtl);
11722 if (mem_loc_result != NULL)
11724 if (GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE
11725 || GET_MODE_CLASS (mode) != MODE_INT)
11727 dw_die_ref type_die;
11728 dw_loc_descr_ref deref;
11733 = base_type_for_mode (mode, GET_MODE_CLASS (mode) == MODE_INT);
11734 if (type_die == NULL)
11736 deref = new_loc_descr (DW_OP_GNU_deref_type,
11737 GET_MODE_SIZE (mode), 0);
11738 deref->dw_loc_oprnd2.val_class = dw_val_class_die_ref;
11739 deref->dw_loc_oprnd2.v.val_die_ref.die = type_die;
11740 deref->dw_loc_oprnd2.v.val_die_ref.external = 0;
11741 add_loc_descr (&mem_loc_result, deref);
11743 else if (GET_MODE_SIZE (mode) == DWARF2_ADDR_SIZE)
11744 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
11746 add_loc_descr (&mem_loc_result,
11747 new_loc_descr (DW_OP_deref_size,
11748 GET_MODE_SIZE (mode), 0));
11753 return mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode, initialized);
11756 /* Some ports can transform a symbol ref into a label ref, because
11757 the symbol ref is too far away and has to be dumped into a constant
11761 if (GET_MODE_CLASS (mode) != MODE_INT
11762 || (GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE
11763 #ifdef POINTERS_EXTEND_UNSIGNED
11764 && (mode != Pmode || mem_mode == VOIDmode)
11768 if (GET_CODE (rtl) == SYMBOL_REF
11769 && SYMBOL_REF_TLS_MODEL (rtl) != TLS_MODEL_NONE)
11771 dw_loc_descr_ref temp;
11773 /* If this is not defined, we have no way to emit the data. */
11774 if (!targetm.have_tls || !targetm.asm_out.output_dwarf_dtprel)
11777 /* We used to emit DW_OP_addr here, but that's wrong, since
11778 DW_OP_addr should be relocated by the debug info consumer,
11779 while DW_OP_GNU_push_tls_address operand should not. */
11780 temp = new_loc_descr (DWARF2_ADDR_SIZE == 4
11781 ? DW_OP_const4u : DW_OP_const8u, 0, 0);
11782 temp->dw_loc_oprnd1.val_class = dw_val_class_addr;
11783 temp->dw_loc_oprnd1.v.val_addr = rtl;
11784 temp->dtprel = true;
11786 mem_loc_result = new_loc_descr (DW_OP_GNU_push_tls_address, 0, 0);
11787 add_loc_descr (&mem_loc_result, temp);
11792 if (!const_ok_for_output (rtl))
11796 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
11797 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
11798 mem_loc_result->dw_loc_oprnd1.v.val_addr = rtl;
11799 VEC_safe_push (rtx, gc, used_rtx_array, rtl);
11805 case DEBUG_IMPLICIT_PTR:
11806 expansion_failed (NULL_TREE, rtl,
11807 "CONCAT/CONCATN/VAR_LOCATION is handled only by loc_descriptor");
11813 if (REG_P (ENTRY_VALUE_EXP (rtl)))
11815 if (GET_MODE_CLASS (mode) != MODE_INT
11816 || GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE)
11817 op0 = mem_loc_descriptor (ENTRY_VALUE_EXP (rtl), mode,
11818 VOIDmode, VAR_INIT_STATUS_INITIALIZED);
11821 = one_reg_loc_descriptor (dbx_reg_number (ENTRY_VALUE_EXP (rtl)),
11822 VAR_INIT_STATUS_INITIALIZED);
11824 else if (MEM_P (ENTRY_VALUE_EXP (rtl))
11825 && REG_P (XEXP (ENTRY_VALUE_EXP (rtl), 0)))
11827 op0 = mem_loc_descriptor (ENTRY_VALUE_EXP (rtl), mode,
11828 VOIDmode, VAR_INIT_STATUS_INITIALIZED);
11829 if (op0 && op0->dw_loc_opc == DW_OP_fbreg)
11833 gcc_unreachable ();
11836 mem_loc_result = new_loc_descr (DW_OP_GNU_entry_value, 0, 0);
11837 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_loc;
11838 mem_loc_result->dw_loc_oprnd1.v.val_loc = op0;
11841 case DEBUG_PARAMETER_REF:
11842 mem_loc_result = parameter_ref_descriptor (rtl);
11846 /* Extract the PLUS expression nested inside and fall into
11847 PLUS code below. */
11848 rtl = XEXP (rtl, 1);
11853 /* Turn these into a PLUS expression and fall into the PLUS code
11855 rtl = gen_rtx_PLUS (mode, XEXP (rtl, 0),
11856 GEN_INT (GET_CODE (rtl) == PRE_INC
11857 ? GET_MODE_UNIT_SIZE (mem_mode)
11858 : -GET_MODE_UNIT_SIZE (mem_mode)));
11860 /* ... fall through ... */
11864 if (is_based_loc (rtl)
11865 && GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
11866 && GET_MODE_CLASS (mode) == MODE_INT)
11867 mem_loc_result = based_loc_descr (XEXP (rtl, 0),
11868 INTVAL (XEXP (rtl, 1)),
11869 VAR_INIT_STATUS_INITIALIZED);
11872 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11873 VAR_INIT_STATUS_INITIALIZED);
11874 if (mem_loc_result == 0)
11877 if (CONST_INT_P (XEXP (rtl, 1))
11878 && GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE)
11879 loc_descr_plus_const (&mem_loc_result, INTVAL (XEXP (rtl, 1)));
11882 op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
11883 VAR_INIT_STATUS_INITIALIZED);
11886 add_loc_descr (&mem_loc_result, op1);
11887 add_loc_descr (&mem_loc_result,
11888 new_loc_descr (DW_OP_plus, 0, 0));
11893 /* If a pseudo-reg is optimized away, it is possible for it to
11894 be replaced with a MEM containing a multiply or shift. */
11905 && GET_MODE_CLASS (mode) == MODE_INT
11906 && GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE)
11908 mem_loc_result = typed_binop (DW_OP_div, rtl,
11909 base_type_for_mode (mode, 0),
11933 if (GET_MODE_CLASS (mode) != MODE_INT)
11935 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11936 VAR_INIT_STATUS_INITIALIZED);
11938 rtx rtlop1 = XEXP (rtl, 1);
11939 if (GET_MODE (rtlop1) != VOIDmode
11940 && GET_MODE_BITSIZE (GET_MODE (rtlop1))
11941 < GET_MODE_BITSIZE (mode))
11942 rtlop1 = gen_rtx_ZERO_EXTEND (mode, rtlop1);
11943 op1 = mem_loc_descriptor (rtlop1, mode, mem_mode,
11944 VAR_INIT_STATUS_INITIALIZED);
11947 if (op0 == 0 || op1 == 0)
11950 mem_loc_result = op0;
11951 add_loc_descr (&mem_loc_result, op1);
11952 add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0));
11968 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11969 VAR_INIT_STATUS_INITIALIZED);
11970 op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
11971 VAR_INIT_STATUS_INITIALIZED);
11973 if (op0 == 0 || op1 == 0)
11976 mem_loc_result = op0;
11977 add_loc_descr (&mem_loc_result, op1);
11978 add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0));
11982 if (GET_MODE_SIZE (mode) > DWARF2_ADDR_SIZE && !dwarf_strict)
11984 mem_loc_result = typed_binop (DW_OP_mod, rtl,
11985 base_type_for_mode (mode, 0),
11990 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
11991 VAR_INIT_STATUS_INITIALIZED);
11992 op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
11993 VAR_INIT_STATUS_INITIALIZED);
11995 if (op0 == 0 || op1 == 0)
11998 mem_loc_result = op0;
11999 add_loc_descr (&mem_loc_result, op1);
12000 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_over, 0, 0));
12001 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_over, 0, 0));
12002 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_div, 0, 0));
12003 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
12004 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_minus, 0, 0));
12008 if (!dwarf_strict && GET_MODE_CLASS (mode) == MODE_INT)
12010 if (GET_MODE_CLASS (mode) > DWARF2_ADDR_SIZE)
12015 mem_loc_result = typed_binop (DW_OP_div, rtl,
12016 base_type_for_mode (mode, 1),
12034 op0 = mem_loc_descriptor (XEXP (rtl, 0), mode, mem_mode,
12035 VAR_INIT_STATUS_INITIALIZED);
12040 mem_loc_result = op0;
12041 add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0));
12045 if (GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
12046 #ifdef POINTERS_EXTEND_UNSIGNED
12048 && mem_mode != VOIDmode
12049 && trunc_int_for_mode (INTVAL (rtl), ptr_mode) == INTVAL (rtl))
12053 mem_loc_result = int_loc_descriptor (INTVAL (rtl));
12057 && (GET_MODE_BITSIZE (mode) == HOST_BITS_PER_WIDE_INT
12058 || GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_WIDE_INT))
12060 dw_die_ref type_die = base_type_for_mode (mode, 1);
12061 enum machine_mode amode;
12062 if (type_die == NULL)
12064 amode = mode_for_size (DWARF2_ADDR_SIZE * BITS_PER_UNIT,
12066 if (INTVAL (rtl) >= 0
12067 && amode != BLKmode
12068 && trunc_int_for_mode (INTVAL (rtl), amode) == INTVAL (rtl)
12069 /* const DW_OP_GNU_convert <XXX> vs.
12070 DW_OP_GNU_const_type <XXX, 1, const>. */
12071 && size_of_int_loc_descriptor (INTVAL (rtl)) + 1 + 1
12072 < (unsigned long) 1 + 1 + 1 + GET_MODE_SIZE (mode))
12074 mem_loc_result = int_loc_descriptor (INTVAL (rtl));
12075 op0 = new_loc_descr (DW_OP_GNU_convert, 0, 0);
12076 op0->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
12077 op0->dw_loc_oprnd1.v.val_die_ref.die = type_die;
12078 op0->dw_loc_oprnd1.v.val_die_ref.external = 0;
12079 add_loc_descr (&mem_loc_result, op0);
12080 return mem_loc_result;
12082 mem_loc_result = new_loc_descr (DW_OP_GNU_const_type, 0,
12084 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
12085 mem_loc_result->dw_loc_oprnd1.v.val_die_ref.die = type_die;
12086 mem_loc_result->dw_loc_oprnd1.v.val_die_ref.external = 0;
12087 if (GET_MODE_BITSIZE (mode) == HOST_BITS_PER_WIDE_INT)
12088 mem_loc_result->dw_loc_oprnd2.val_class = dw_val_class_const;
12091 mem_loc_result->dw_loc_oprnd2.val_class
12092 = dw_val_class_const_double;
12093 mem_loc_result->dw_loc_oprnd2.v.val_double
12094 = shwi_to_double_int (INTVAL (rtl));
12102 dw_die_ref type_die;
12104 /* Note that a CONST_DOUBLE rtx could represent either an integer
12105 or a floating-point constant. A CONST_DOUBLE is used whenever
12106 the constant requires more than one word in order to be
12107 adequately represented. We output CONST_DOUBLEs as blocks. */
12108 if (mode == VOIDmode
12109 || (GET_MODE (rtl) == VOIDmode
12110 && GET_MODE_BITSIZE (mode) != 2 * HOST_BITS_PER_WIDE_INT))
12112 type_die = base_type_for_mode (mode,
12113 GET_MODE_CLASS (mode) == MODE_INT);
12114 if (type_die == NULL)
12116 mem_loc_result = new_loc_descr (DW_OP_GNU_const_type, 0, 0);
12117 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
12118 mem_loc_result->dw_loc_oprnd1.v.val_die_ref.die = type_die;
12119 mem_loc_result->dw_loc_oprnd1.v.val_die_ref.external = 0;
12120 if (SCALAR_FLOAT_MODE_P (mode))
12122 unsigned int length = GET_MODE_SIZE (mode);
12123 unsigned char *array
12124 = (unsigned char*) ggc_alloc_atomic (length);
12126 insert_float (rtl, array);
12127 mem_loc_result->dw_loc_oprnd2.val_class = dw_val_class_vec;
12128 mem_loc_result->dw_loc_oprnd2.v.val_vec.length = length / 4;
12129 mem_loc_result->dw_loc_oprnd2.v.val_vec.elt_size = 4;
12130 mem_loc_result->dw_loc_oprnd2.v.val_vec.array = array;
12134 mem_loc_result->dw_loc_oprnd2.val_class
12135 = dw_val_class_const_double;
12136 mem_loc_result->dw_loc_oprnd2.v.val_double
12137 = rtx_to_double_int (rtl);
12143 mem_loc_result = scompare_loc_descriptor (DW_OP_eq, rtl, mem_mode);
12147 mem_loc_result = scompare_loc_descriptor (DW_OP_ge, rtl, mem_mode);
12151 mem_loc_result = scompare_loc_descriptor (DW_OP_gt, rtl, mem_mode);
12155 mem_loc_result = scompare_loc_descriptor (DW_OP_le, rtl, mem_mode);
12159 mem_loc_result = scompare_loc_descriptor (DW_OP_lt, rtl, mem_mode);
12163 mem_loc_result = scompare_loc_descriptor (DW_OP_ne, rtl, mem_mode);
12167 mem_loc_result = ucompare_loc_descriptor (DW_OP_ge, rtl, mem_mode);
12171 mem_loc_result = ucompare_loc_descriptor (DW_OP_gt, rtl, mem_mode);
12175 mem_loc_result = ucompare_loc_descriptor (DW_OP_le, rtl, mem_mode);
12179 mem_loc_result = ucompare_loc_descriptor (DW_OP_lt, rtl, mem_mode);
12184 if (GET_MODE_CLASS (mode) != MODE_INT)
12189 mem_loc_result = minmax_loc_descriptor (rtl, mode, mem_mode);
12194 if (CONST_INT_P (XEXP (rtl, 1))
12195 && CONST_INT_P (XEXP (rtl, 2))
12196 && ((unsigned) INTVAL (XEXP (rtl, 1))
12197 + (unsigned) INTVAL (XEXP (rtl, 2))
12198 <= GET_MODE_BITSIZE (mode))
12199 && GET_MODE_CLASS (mode) == MODE_INT
12200 && GET_MODE_SIZE (mode) <= DWARF2_ADDR_SIZE
12201 && GET_MODE_SIZE (GET_MODE (XEXP (rtl, 0))) <= DWARF2_ADDR_SIZE)
12204 op0 = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (XEXP (rtl, 0)),
12205 mem_mode, VAR_INIT_STATUS_INITIALIZED);
12208 if (GET_CODE (rtl) == SIGN_EXTRACT)
12212 mem_loc_result = op0;
12213 size = INTVAL (XEXP (rtl, 1));
12214 shift = INTVAL (XEXP (rtl, 2));
12215 if (BITS_BIG_ENDIAN)
12216 shift = GET_MODE_BITSIZE (GET_MODE (XEXP (rtl, 0)))
12218 if (shift + size != (int) DWARF2_ADDR_SIZE)
12220 add_loc_descr (&mem_loc_result,
12221 int_loc_descriptor (DWARF2_ADDR_SIZE
12223 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_shl, 0, 0));
12225 if (size != (int) DWARF2_ADDR_SIZE)
12227 add_loc_descr (&mem_loc_result,
12228 int_loc_descriptor (DWARF2_ADDR_SIZE - size));
12229 add_loc_descr (&mem_loc_result, new_loc_descr (op, 0, 0));
12236 dw_loc_descr_ref op2, bra_node, drop_node;
12237 op0 = mem_loc_descriptor (XEXP (rtl, 0),
12238 GET_MODE (XEXP (rtl, 0)) == VOIDmode
12239 ? word_mode : GET_MODE (XEXP (rtl, 0)),
12240 mem_mode, VAR_INIT_STATUS_INITIALIZED);
12241 op1 = mem_loc_descriptor (XEXP (rtl, 1), mode, mem_mode,
12242 VAR_INIT_STATUS_INITIALIZED);
12243 op2 = mem_loc_descriptor (XEXP (rtl, 2), mode, mem_mode,
12244 VAR_INIT_STATUS_INITIALIZED);
12245 if (op0 == NULL || op1 == NULL || op2 == NULL)
12248 mem_loc_result = op1;
12249 add_loc_descr (&mem_loc_result, op2);
12250 add_loc_descr (&mem_loc_result, op0);
12251 bra_node = new_loc_descr (DW_OP_bra, 0, 0);
12252 add_loc_descr (&mem_loc_result, bra_node);
12253 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_swap, 0, 0));
12254 drop_node = new_loc_descr (DW_OP_drop, 0, 0);
12255 add_loc_descr (&mem_loc_result, drop_node);
12256 bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc;
12257 bra_node->dw_loc_oprnd1.v.val_loc = drop_node;
12262 case FLOAT_TRUNCATE:
12264 case UNSIGNED_FLOAT:
12269 dw_die_ref type_die;
12270 dw_loc_descr_ref cvt;
12272 op0 = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (XEXP (rtl, 0)),
12273 mem_mode, VAR_INIT_STATUS_INITIALIZED);
12276 if (GET_MODE_CLASS (GET_MODE (XEXP (rtl, 0))) == MODE_INT
12277 && (GET_CODE (rtl) == FLOAT
12278 || GET_MODE_SIZE (GET_MODE (XEXP (rtl, 0)))
12279 <= DWARF2_ADDR_SIZE))
12281 type_die = base_type_for_mode (GET_MODE (XEXP (rtl, 0)),
12282 GET_CODE (rtl) == UNSIGNED_FLOAT);
12283 if (type_die == NULL)
12285 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
12286 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
12287 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
12288 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
12289 add_loc_descr (&op0, cvt);
12291 type_die = base_type_for_mode (mode, GET_CODE (rtl) == UNSIGNED_FIX);
12292 if (type_die == NULL)
12294 cvt = new_loc_descr (DW_OP_GNU_convert, 0, 0);
12295 cvt->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
12296 cvt->dw_loc_oprnd1.v.val_die_ref.die = type_die;
12297 cvt->dw_loc_oprnd1.v.val_die_ref.external = 0;
12298 add_loc_descr (&op0, cvt);
12299 if (GET_MODE_CLASS (mode) == MODE_INT
12300 && (GET_CODE (rtl) == FIX
12301 || GET_MODE_SIZE (mode) < DWARF2_ADDR_SIZE))
12303 op0 = convert_descriptor_to_mode (mode, op0);
12307 mem_loc_result = op0;
12314 mem_loc_result = clz_loc_descriptor (rtl, mode, mem_mode);
12319 mem_loc_result = popcount_loc_descriptor (rtl, mode, mem_mode);
12323 mem_loc_result = bswap_loc_descriptor (rtl, mode, mem_mode);
12328 mem_loc_result = rotate_loc_descriptor (rtl, mode, mem_mode);
12333 /* In theory, we could implement the above. */
12334 /* DWARF cannot represent the unsigned compare operations
12359 case FRACT_CONVERT:
12360 case UNSIGNED_FRACT_CONVERT:
12362 case UNSIGNED_SAT_FRACT:
12368 case VEC_DUPLICATE:
12372 case STRICT_LOW_PART:
12376 /* If delegitimize_address couldn't do anything with the UNSPEC, we
12377 can't express it in the debug info. This can happen e.g. with some
12382 resolve_one_addr (&rtl, NULL);
12386 #ifdef ENABLE_CHECKING
12387 print_rtl (stderr, rtl);
12388 gcc_unreachable ();
12394 if (mem_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED)
12395 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0));
12397 return mem_loc_result;
12400 /* Return a descriptor that describes the concatenation of two locations.
12401 This is typically a complex variable. */
12403 static dw_loc_descr_ref
12404 concat_loc_descriptor (rtx x0, rtx x1, enum var_init_status initialized)
12406 dw_loc_descr_ref cc_loc_result = NULL;
12407 dw_loc_descr_ref x0_ref
12408 = loc_descriptor (x0, VOIDmode, VAR_INIT_STATUS_INITIALIZED);
12409 dw_loc_descr_ref x1_ref
12410 = loc_descriptor (x1, VOIDmode, VAR_INIT_STATUS_INITIALIZED);
12412 if (x0_ref == 0 || x1_ref == 0)
12415 cc_loc_result = x0_ref;
12416 add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x0)));
12418 add_loc_descr (&cc_loc_result, x1_ref);
12419 add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x1)));
12421 if (initialized == VAR_INIT_STATUS_UNINITIALIZED)
12422 add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0));
12424 return cc_loc_result;
12427 /* Return a descriptor that describes the concatenation of N
12430 static dw_loc_descr_ref
12431 concatn_loc_descriptor (rtx concatn, enum var_init_status initialized)
12434 dw_loc_descr_ref cc_loc_result = NULL;
12435 unsigned int n = XVECLEN (concatn, 0);
12437 for (i = 0; i < n; ++i)
12439 dw_loc_descr_ref ref;
12440 rtx x = XVECEXP (concatn, 0, i);
12442 ref = loc_descriptor (x, VOIDmode, VAR_INIT_STATUS_INITIALIZED);
12446 add_loc_descr (&cc_loc_result, ref);
12447 add_loc_descr_op_piece (&cc_loc_result, GET_MODE_SIZE (GET_MODE (x)));
12450 if (cc_loc_result && initialized == VAR_INIT_STATUS_UNINITIALIZED)
12451 add_loc_descr (&cc_loc_result, new_loc_descr (DW_OP_GNU_uninit, 0, 0));
12453 return cc_loc_result;
12456 /* Helper function for loc_descriptor. Return DW_OP_GNU_implicit_pointer
12457 for DEBUG_IMPLICIT_PTR RTL. */
12459 static dw_loc_descr_ref
12460 implicit_ptr_descriptor (rtx rtl, HOST_WIDE_INT offset)
12462 dw_loc_descr_ref ret;
12467 gcc_assert (TREE_CODE (DEBUG_IMPLICIT_PTR_DECL (rtl)) == VAR_DECL
12468 || TREE_CODE (DEBUG_IMPLICIT_PTR_DECL (rtl)) == PARM_DECL
12469 || TREE_CODE (DEBUG_IMPLICIT_PTR_DECL (rtl)) == RESULT_DECL);
12470 ref = lookup_decl_die (DEBUG_IMPLICIT_PTR_DECL (rtl));
12471 ret = new_loc_descr (DW_OP_GNU_implicit_pointer, 0, offset);
12472 ret->dw_loc_oprnd2.val_class = dw_val_class_const;
12475 ret->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
12476 ret->dw_loc_oprnd1.v.val_die_ref.die = ref;
12477 ret->dw_loc_oprnd1.v.val_die_ref.external = 0;
12481 ret->dw_loc_oprnd1.val_class = dw_val_class_decl_ref;
12482 ret->dw_loc_oprnd1.v.val_decl_ref = DEBUG_IMPLICIT_PTR_DECL (rtl);
12487 /* Output a proper Dwarf location descriptor for a variable or parameter
12488 which is either allocated in a register or in a memory location. For a
12489 register, we just generate an OP_REG and the register number. For a
12490 memory location we provide a Dwarf postfix expression describing how to
12491 generate the (dynamic) address of the object onto the address stack.
12493 MODE is mode of the decl if this loc_descriptor is going to be used in
12494 .debug_loc section where DW_OP_stack_value and DW_OP_implicit_value are
12495 allowed, VOIDmode otherwise.
12497 If we don't know how to describe it, return 0. */
12499 static dw_loc_descr_ref
12500 loc_descriptor (rtx rtl, enum machine_mode mode,
12501 enum var_init_status initialized)
12503 dw_loc_descr_ref loc_result = NULL;
12505 switch (GET_CODE (rtl))
12508 /* The case of a subreg may arise when we have a local (register)
12509 variable or a formal (register) parameter which doesn't quite fill
12510 up an entire register. For now, just assume that it is
12511 legitimate to make the Dwarf info refer to the whole register which
12512 contains the given subreg. */
12513 if (REG_P (SUBREG_REG (rtl)) && subreg_lowpart_p (rtl))
12514 loc_result = loc_descriptor (SUBREG_REG (rtl),
12515 GET_MODE (SUBREG_REG (rtl)), initialized);
12521 loc_result = reg_loc_descriptor (rtl, initialized);
12525 loc_result = mem_loc_descriptor (XEXP (rtl, 0), get_address_mode (rtl),
12526 GET_MODE (rtl), initialized);
12527 if (loc_result == NULL)
12528 loc_result = tls_mem_loc_descriptor (rtl);
12529 if (loc_result == NULL)
12531 rtx new_rtl = avoid_constant_pool_reference (rtl);
12532 if (new_rtl != rtl)
12533 loc_result = loc_descriptor (new_rtl, mode, initialized);
12538 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1),
12543 loc_result = concatn_loc_descriptor (rtl, initialized);
12548 if (GET_CODE (PAT_VAR_LOCATION_LOC (rtl)) != PARALLEL)
12550 rtx loc = PAT_VAR_LOCATION_LOC (rtl);
12551 if (GET_CODE (loc) == EXPR_LIST)
12552 loc = XEXP (loc, 0);
12553 loc_result = loc_descriptor (loc, mode, initialized);
12557 rtl = XEXP (rtl, 1);
12562 rtvec par_elems = XVEC (rtl, 0);
12563 int num_elem = GET_NUM_ELEM (par_elems);
12564 enum machine_mode mode;
12567 /* Create the first one, so we have something to add to. */
12568 loc_result = loc_descriptor (XEXP (RTVEC_ELT (par_elems, 0), 0),
12569 VOIDmode, initialized);
12570 if (loc_result == NULL)
12572 mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, 0), 0));
12573 add_loc_descr_op_piece (&loc_result, GET_MODE_SIZE (mode));
12574 for (i = 1; i < num_elem; i++)
12576 dw_loc_descr_ref temp;
12578 temp = loc_descriptor (XEXP (RTVEC_ELT (par_elems, i), 0),
12579 VOIDmode, initialized);
12582 add_loc_descr (&loc_result, temp);
12583 mode = GET_MODE (XEXP (RTVEC_ELT (par_elems, i), 0));
12584 add_loc_descr_op_piece (&loc_result, GET_MODE_SIZE (mode));
12590 if (mode != VOIDmode && mode != BLKmode)
12591 loc_result = address_of_int_loc_descriptor (GET_MODE_SIZE (mode),
12596 if (mode == VOIDmode)
12597 mode = GET_MODE (rtl);
12599 if (mode != VOIDmode && (dwarf_version >= 4 || !dwarf_strict))
12601 gcc_assert (mode == GET_MODE (rtl) || VOIDmode == GET_MODE (rtl));
12603 /* Note that a CONST_DOUBLE rtx could represent either an integer
12604 or a floating-point constant. A CONST_DOUBLE is used whenever
12605 the constant requires more than one word in order to be
12606 adequately represented. We output CONST_DOUBLEs as blocks. */
12607 loc_result = new_loc_descr (DW_OP_implicit_value,
12608 GET_MODE_SIZE (mode), 0);
12609 if (SCALAR_FLOAT_MODE_P (mode))
12611 unsigned int length = GET_MODE_SIZE (mode);
12612 unsigned char *array
12613 = (unsigned char*) ggc_alloc_atomic (length);
12615 insert_float (rtl, array);
12616 loc_result->dw_loc_oprnd2.val_class = dw_val_class_vec;
12617 loc_result->dw_loc_oprnd2.v.val_vec.length = length / 4;
12618 loc_result->dw_loc_oprnd2.v.val_vec.elt_size = 4;
12619 loc_result->dw_loc_oprnd2.v.val_vec.array = array;
12623 loc_result->dw_loc_oprnd2.val_class = dw_val_class_const_double;
12624 loc_result->dw_loc_oprnd2.v.val_double
12625 = rtx_to_double_int (rtl);
12631 if (mode == VOIDmode)
12632 mode = GET_MODE (rtl);
12634 if (mode != VOIDmode && (dwarf_version >= 4 || !dwarf_strict))
12636 unsigned int elt_size = GET_MODE_UNIT_SIZE (GET_MODE (rtl));
12637 unsigned int length = CONST_VECTOR_NUNITS (rtl);
12638 unsigned char *array = (unsigned char *)
12639 ggc_alloc_atomic (length * elt_size);
12643 gcc_assert (mode == GET_MODE (rtl) || VOIDmode == GET_MODE (rtl));
12644 switch (GET_MODE_CLASS (mode))
12646 case MODE_VECTOR_INT:
12647 for (i = 0, p = array; i < length; i++, p += elt_size)
12649 rtx elt = CONST_VECTOR_ELT (rtl, i);
12650 double_int val = rtx_to_double_int (elt);
12652 if (elt_size <= sizeof (HOST_WIDE_INT))
12653 insert_int (double_int_to_shwi (val), elt_size, p);
12656 gcc_assert (elt_size == 2 * sizeof (HOST_WIDE_INT));
12657 insert_double (val, p);
12662 case MODE_VECTOR_FLOAT:
12663 for (i = 0, p = array; i < length; i++, p += elt_size)
12665 rtx elt = CONST_VECTOR_ELT (rtl, i);
12666 insert_float (elt, p);
12671 gcc_unreachable ();
12674 loc_result = new_loc_descr (DW_OP_implicit_value,
12675 length * elt_size, 0);
12676 loc_result->dw_loc_oprnd2.val_class = dw_val_class_vec;
12677 loc_result->dw_loc_oprnd2.v.val_vec.length = length;
12678 loc_result->dw_loc_oprnd2.v.val_vec.elt_size = elt_size;
12679 loc_result->dw_loc_oprnd2.v.val_vec.array = array;
12684 if (mode == VOIDmode
12685 || GET_CODE (XEXP (rtl, 0)) == CONST_INT
12686 || GET_CODE (XEXP (rtl, 0)) == CONST_DOUBLE
12687 || GET_CODE (XEXP (rtl, 0)) == CONST_VECTOR)
12689 loc_result = loc_descriptor (XEXP (rtl, 0), mode, initialized);
12694 if (!const_ok_for_output (rtl))
12697 if (mode != VOIDmode && GET_MODE_SIZE (mode) == DWARF2_ADDR_SIZE
12698 && (dwarf_version >= 4 || !dwarf_strict))
12700 loc_result = new_loc_descr (DW_OP_addr, 0, 0);
12701 loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
12702 loc_result->dw_loc_oprnd1.v.val_addr = rtl;
12703 add_loc_descr (&loc_result, new_loc_descr (DW_OP_stack_value, 0, 0));
12704 VEC_safe_push (rtx, gc, used_rtx_array, rtl);
12708 case DEBUG_IMPLICIT_PTR:
12709 loc_result = implicit_ptr_descriptor (rtl, 0);
12713 if (GET_CODE (XEXP (rtl, 0)) == DEBUG_IMPLICIT_PTR
12714 && CONST_INT_P (XEXP (rtl, 1)))
12717 = implicit_ptr_descriptor (XEXP (rtl, 0), INTVAL (XEXP (rtl, 1)));
12723 if ((GET_MODE_CLASS (mode) == MODE_INT && GET_MODE (rtl) == mode
12724 && GET_MODE_SIZE (GET_MODE (rtl)) <= DWARF2_ADDR_SIZE
12725 && dwarf_version >= 4)
12726 || (!dwarf_strict && mode != VOIDmode && mode != BLKmode))
12728 /* Value expression. */
12729 loc_result = mem_loc_descriptor (rtl, mode, VOIDmode, initialized);
12731 add_loc_descr (&loc_result,
12732 new_loc_descr (DW_OP_stack_value, 0, 0));
12740 /* We need to figure out what section we should use as the base for the
12741 address ranges where a given location is valid.
12742 1. If this particular DECL has a section associated with it, use that.
12743 2. If this function has a section associated with it, use that.
12744 3. Otherwise, use the text section.
12745 XXX: If you split a variable across multiple sections, we won't notice. */
12747 static const char *
12748 secname_for_decl (const_tree decl)
12750 const char *secname;
12752 if (VAR_OR_FUNCTION_DECL_P (decl) && DECL_SECTION_NAME (decl))
12754 tree sectree = DECL_SECTION_NAME (decl);
12755 secname = TREE_STRING_POINTER (sectree);
12757 else if (current_function_decl && DECL_SECTION_NAME (current_function_decl))
12759 tree sectree = DECL_SECTION_NAME (current_function_decl);
12760 secname = TREE_STRING_POINTER (sectree);
12762 else if (cfun && in_cold_section_p)
12763 secname = crtl->subsections.cold_section_label;
12765 secname = text_section_label;
12770 /* Return true when DECL_BY_REFERENCE is defined and set for DECL. */
12773 decl_by_reference_p (tree decl)
12775 return ((TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL
12776 || TREE_CODE (decl) == VAR_DECL)
12777 && DECL_BY_REFERENCE (decl));
12780 /* Helper function for dw_loc_list. Compute proper Dwarf location descriptor
12783 static dw_loc_descr_ref
12784 dw_loc_list_1 (tree loc, rtx varloc, int want_address,
12785 enum var_init_status initialized)
12787 int have_address = 0;
12788 dw_loc_descr_ref descr;
12789 enum machine_mode mode;
12791 if (want_address != 2)
12793 gcc_assert (GET_CODE (varloc) == VAR_LOCATION);
12795 if (GET_CODE (PAT_VAR_LOCATION_LOC (varloc)) != PARALLEL)
12797 varloc = PAT_VAR_LOCATION_LOC (varloc);
12798 if (GET_CODE (varloc) == EXPR_LIST)
12799 varloc = XEXP (varloc, 0);
12800 mode = GET_MODE (varloc);
12801 if (MEM_P (varloc))
12803 rtx addr = XEXP (varloc, 0);
12804 descr = mem_loc_descriptor (addr, get_address_mode (varloc),
12805 mode, initialized);
12810 rtx x = avoid_constant_pool_reference (varloc);
12812 descr = mem_loc_descriptor (x, mode, VOIDmode,
12817 descr = mem_loc_descriptor (varloc, mode, VOIDmode, initialized);
12824 if (GET_CODE (varloc) == VAR_LOCATION)
12825 mode = DECL_MODE (PAT_VAR_LOCATION_DECL (varloc));
12827 mode = DECL_MODE (loc);
12828 descr = loc_descriptor (varloc, mode, initialized);
12835 if (want_address == 2 && !have_address
12836 && (dwarf_version >= 4 || !dwarf_strict))
12838 if (int_size_in_bytes (TREE_TYPE (loc)) > DWARF2_ADDR_SIZE)
12840 expansion_failed (loc, NULL_RTX,
12841 "DWARF address size mismatch");
12844 add_loc_descr (&descr, new_loc_descr (DW_OP_stack_value, 0, 0));
12847 /* Show if we can't fill the request for an address. */
12848 if (want_address && !have_address)
12850 expansion_failed (loc, NULL_RTX,
12851 "Want address and only have value");
12855 /* If we've got an address and don't want one, dereference. */
12856 if (!want_address && have_address)
12858 HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (loc));
12859 enum dwarf_location_atom op;
12861 if (size > DWARF2_ADDR_SIZE || size == -1)
12863 expansion_failed (loc, NULL_RTX,
12864 "DWARF address size mismatch");
12867 else if (size == DWARF2_ADDR_SIZE)
12870 op = DW_OP_deref_size;
12872 add_loc_descr (&descr, new_loc_descr (op, size, 0));
12878 /* Create a DW_OP_piece or DW_OP_bit_piece for bitsize, or return NULL
12879 if it is not possible. */
12881 static dw_loc_descr_ref
12882 new_loc_descr_op_bit_piece (HOST_WIDE_INT bitsize, HOST_WIDE_INT offset)
12884 if ((bitsize % BITS_PER_UNIT) == 0 && offset == 0)
12885 return new_loc_descr (DW_OP_piece, bitsize / BITS_PER_UNIT, 0);
12886 else if (dwarf_version >= 3 || !dwarf_strict)
12887 return new_loc_descr (DW_OP_bit_piece, bitsize, offset);
12892 /* Helper function for dw_loc_list. Compute proper Dwarf location descriptor
12893 for VAR_LOC_NOTE for variable DECL that has been optimized by SRA. */
12895 static dw_loc_descr_ref
12896 dw_sra_loc_expr (tree decl, rtx loc)
12899 unsigned int padsize = 0;
12900 dw_loc_descr_ref descr, *descr_tail;
12901 unsigned HOST_WIDE_INT decl_size;
12903 enum var_init_status initialized;
12905 if (DECL_SIZE (decl) == NULL
12906 || !host_integerp (DECL_SIZE (decl), 1))
12909 decl_size = tree_low_cst (DECL_SIZE (decl), 1);
12911 descr_tail = &descr;
12913 for (p = loc; p; p = XEXP (p, 1))
12915 unsigned int bitsize = decl_piece_bitsize (p);
12916 rtx loc_note = *decl_piece_varloc_ptr (p);
12917 dw_loc_descr_ref cur_descr;
12918 dw_loc_descr_ref *tail, last = NULL;
12919 unsigned int opsize = 0;
12921 if (loc_note == NULL_RTX
12922 || NOTE_VAR_LOCATION_LOC (loc_note) == NULL_RTX)
12924 padsize += bitsize;
12927 initialized = NOTE_VAR_LOCATION_STATUS (loc_note);
12928 varloc = NOTE_VAR_LOCATION (loc_note);
12929 cur_descr = dw_loc_list_1 (decl, varloc, 2, initialized);
12930 if (cur_descr == NULL)
12932 padsize += bitsize;
12936 /* Check that cur_descr either doesn't use
12937 DW_OP_*piece operations, or their sum is equal
12938 to bitsize. Otherwise we can't embed it. */
12939 for (tail = &cur_descr; *tail != NULL;
12940 tail = &(*tail)->dw_loc_next)
12941 if ((*tail)->dw_loc_opc == DW_OP_piece)
12943 opsize += (*tail)->dw_loc_oprnd1.v.val_unsigned
12947 else if ((*tail)->dw_loc_opc == DW_OP_bit_piece)
12949 opsize += (*tail)->dw_loc_oprnd1.v.val_unsigned;
12953 if (last != NULL && opsize != bitsize)
12955 padsize += bitsize;
12959 /* If there is a hole, add DW_OP_*piece after empty DWARF
12960 expression, which means that those bits are optimized out. */
12963 if (padsize > decl_size)
12965 decl_size -= padsize;
12966 *descr_tail = new_loc_descr_op_bit_piece (padsize, 0);
12967 if (*descr_tail == NULL)
12969 descr_tail = &(*descr_tail)->dw_loc_next;
12972 *descr_tail = cur_descr;
12974 if (bitsize > decl_size)
12976 decl_size -= bitsize;
12979 HOST_WIDE_INT offset = 0;
12980 if (GET_CODE (varloc) == VAR_LOCATION
12981 && GET_CODE (PAT_VAR_LOCATION_LOC (varloc)) != PARALLEL)
12983 varloc = PAT_VAR_LOCATION_LOC (varloc);
12984 if (GET_CODE (varloc) == EXPR_LIST)
12985 varloc = XEXP (varloc, 0);
12989 if (GET_CODE (varloc) == CONST
12990 || GET_CODE (varloc) == SIGN_EXTEND
12991 || GET_CODE (varloc) == ZERO_EXTEND)
12992 varloc = XEXP (varloc, 0);
12993 else if (GET_CODE (varloc) == SUBREG)
12994 varloc = SUBREG_REG (varloc);
12999 /* DW_OP_bit_size offset should be zero for register
13000 or implicit location descriptions and empty location
13001 descriptions, but for memory addresses needs big endian
13003 if (MEM_P (varloc))
13005 unsigned HOST_WIDE_INT memsize
13006 = MEM_SIZE (varloc) * BITS_PER_UNIT;
13007 if (memsize != bitsize)
13009 if (BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN
13010 && (memsize > BITS_PER_WORD || bitsize > BITS_PER_WORD))
13012 if (memsize < bitsize)
13014 if (BITS_BIG_ENDIAN)
13015 offset = memsize - bitsize;
13019 *descr_tail = new_loc_descr_op_bit_piece (bitsize, offset);
13020 if (*descr_tail == NULL)
13022 descr_tail = &(*descr_tail)->dw_loc_next;
13026 /* If there were any non-empty expressions, add padding till the end of
13028 if (descr != NULL && decl_size != 0)
13030 *descr_tail = new_loc_descr_op_bit_piece (decl_size, 0);
13031 if (*descr_tail == NULL)
13037 /* Return the dwarf representation of the location list LOC_LIST of
13038 DECL. WANT_ADDRESS has the same meaning as in loc_list_from_tree
13041 static dw_loc_list_ref
13042 dw_loc_list (var_loc_list *loc_list, tree decl, int want_address)
13044 const char *endname, *secname;
13046 enum var_init_status initialized;
13047 struct var_loc_node *node;
13048 dw_loc_descr_ref descr;
13049 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
13050 dw_loc_list_ref list = NULL;
13051 dw_loc_list_ref *listp = &list;
13053 /* Now that we know what section we are using for a base,
13054 actually construct the list of locations.
13055 The first location information is what is passed to the
13056 function that creates the location list, and the remaining
13057 locations just get added on to that list.
13058 Note that we only know the start address for a location
13059 (IE location changes), so to build the range, we use
13060 the range [current location start, next location start].
13061 This means we have to special case the last node, and generate
13062 a range of [last location start, end of function label]. */
13064 secname = secname_for_decl (decl);
13066 for (node = loc_list->first; node; node = node->next)
13067 if (GET_CODE (node->loc) == EXPR_LIST
13068 || NOTE_VAR_LOCATION_LOC (node->loc) != NULL_RTX)
13070 if (GET_CODE (node->loc) == EXPR_LIST)
13072 /* This requires DW_OP_{,bit_}piece, which is not usable
13073 inside DWARF expressions. */
13074 if (want_address != 2)
13076 descr = dw_sra_loc_expr (decl, node->loc);
13082 initialized = NOTE_VAR_LOCATION_STATUS (node->loc);
13083 varloc = NOTE_VAR_LOCATION (node->loc);
13084 descr = dw_loc_list_1 (decl, varloc, want_address, initialized);
13088 bool range_across_switch = false;
13089 /* If section switch happens in between node->label
13090 and node->next->label (or end of function) and
13091 we can't emit it as a single entry list,
13092 emit two ranges, first one ending at the end
13093 of first partition and second one starting at the
13094 beginning of second partition. */
13095 if (node == loc_list->last_before_switch
13096 && (node != loc_list->first || loc_list->first->next)
13097 && current_function_decl)
13099 endname = cfun->fde->dw_fde_end;
13100 range_across_switch = true;
13102 /* The variable has a location between NODE->LABEL and
13103 NODE->NEXT->LABEL. */
13104 else if (node->next)
13105 endname = node->next->label;
13106 /* If the variable has a location at the last label
13107 it keeps its location until the end of function. */
13108 else if (!current_function_decl)
13109 endname = text_end_label;
13112 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
13113 current_function_funcdef_no);
13114 endname = ggc_strdup (label_id);
13117 *listp = new_loc_list (descr, node->label, endname, secname);
13118 if (TREE_CODE (decl) == PARM_DECL
13119 && node == loc_list->first
13120 && GET_CODE (node->loc) == NOTE
13121 && strcmp (node->label, endname) == 0)
13122 (*listp)->force = true;
13123 listp = &(*listp)->dw_loc_next;
13125 if (range_across_switch)
13127 if (GET_CODE (node->loc) == EXPR_LIST)
13128 descr = dw_sra_loc_expr (decl, node->loc);
13131 initialized = NOTE_VAR_LOCATION_STATUS (node->loc);
13132 varloc = NOTE_VAR_LOCATION (node->loc);
13133 descr = dw_loc_list_1 (decl, varloc, want_address,
13136 gcc_assert (descr);
13137 /* The variable has a location between NODE->LABEL and
13138 NODE->NEXT->LABEL. */
13140 endname = node->next->label;
13142 endname = cfun->fde->dw_fde_second_end;
13143 *listp = new_loc_list (descr,
13144 cfun->fde->dw_fde_second_begin,
13146 listp = &(*listp)->dw_loc_next;
13151 /* Try to avoid the overhead of a location list emitting a location
13152 expression instead, but only if we didn't have more than one
13153 location entry in the first place. If some entries were not
13154 representable, we don't want to pretend a single entry that was
13155 applies to the entire scope in which the variable is
13157 if (list && loc_list->first->next)
13163 /* Return if the loc_list has only single element and thus can be represented
13164 as location description. */
13167 single_element_loc_list_p (dw_loc_list_ref list)
13169 gcc_assert (!list->dw_loc_next || list->ll_symbol);
13170 return !list->ll_symbol;
13173 /* To each location in list LIST add loc descr REF. */
13176 add_loc_descr_to_each (dw_loc_list_ref list, dw_loc_descr_ref ref)
13178 dw_loc_descr_ref copy;
13179 add_loc_descr (&list->expr, ref);
13180 list = list->dw_loc_next;
13183 copy = ggc_alloc_dw_loc_descr_node ();
13184 memcpy (copy, ref, sizeof (dw_loc_descr_node));
13185 add_loc_descr (&list->expr, copy);
13186 while (copy->dw_loc_next)
13188 dw_loc_descr_ref new_copy = ggc_alloc_dw_loc_descr_node ();
13189 memcpy (new_copy, copy->dw_loc_next, sizeof (dw_loc_descr_node));
13190 copy->dw_loc_next = new_copy;
13193 list = list->dw_loc_next;
13197 /* Given two lists RET and LIST
13198 produce location list that is result of adding expression in LIST
13199 to expression in RET on each possition in program.
13200 Might be destructive on both RET and LIST.
13202 TODO: We handle only simple cases of RET or LIST having at most one
13203 element. General case would inolve sorting the lists in program order
13204 and merging them that will need some additional work.
13205 Adding that will improve quality of debug info especially for SRA-ed
13209 add_loc_list (dw_loc_list_ref *ret, dw_loc_list_ref list)
13218 if (!list->dw_loc_next)
13220 add_loc_descr_to_each (*ret, list->expr);
13223 if (!(*ret)->dw_loc_next)
13225 add_loc_descr_to_each (list, (*ret)->expr);
13229 expansion_failed (NULL_TREE, NULL_RTX,
13230 "Don't know how to merge two non-trivial"
13231 " location lists.\n");
13236 /* LOC is constant expression. Try a luck, look it up in constant
13237 pool and return its loc_descr of its address. */
13239 static dw_loc_descr_ref
13240 cst_pool_loc_descr (tree loc)
13242 /* Get an RTL for this, if something has been emitted. */
13243 rtx rtl = lookup_constant_def (loc);
13245 if (!rtl || !MEM_P (rtl))
13250 gcc_assert (GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF);
13252 /* TODO: We might get more coverage if we was actually delaying expansion
13253 of all expressions till end of compilation when constant pools are fully
13255 if (!TREE_ASM_WRITTEN (SYMBOL_REF_DECL (XEXP (rtl, 0))))
13257 expansion_failed (loc, NULL_RTX,
13258 "CST value in contant pool but not marked.");
13261 return mem_loc_descriptor (XEXP (rtl, 0), get_address_mode (rtl),
13262 GET_MODE (rtl), VAR_INIT_STATUS_INITIALIZED);
13265 /* Return dw_loc_list representing address of addr_expr LOC
13266 by looking for innder INDIRECT_REF expression and turing it
13267 into simple arithmetics. */
13269 static dw_loc_list_ref
13270 loc_list_for_address_of_addr_expr_of_indirect_ref (tree loc, bool toplev)
13273 HOST_WIDE_INT bitsize, bitpos, bytepos;
13274 enum machine_mode mode;
13276 int unsignedp = TYPE_UNSIGNED (TREE_TYPE (loc));
13277 dw_loc_list_ref list_ret = NULL, list_ret1 = NULL;
13279 obj = get_inner_reference (TREE_OPERAND (loc, 0),
13280 &bitsize, &bitpos, &offset, &mode,
13281 &unsignedp, &volatilep, false);
13283 if (bitpos % BITS_PER_UNIT)
13285 expansion_failed (loc, NULL_RTX, "bitfield access");
13288 if (!INDIRECT_REF_P (obj))
13290 expansion_failed (obj,
13291 NULL_RTX, "no indirect ref in inner refrence");
13294 if (!offset && !bitpos)
13295 list_ret = loc_list_from_tree (TREE_OPERAND (obj, 0), toplev ? 2 : 1);
13297 && int_size_in_bytes (TREE_TYPE (loc)) <= DWARF2_ADDR_SIZE
13298 && (dwarf_version >= 4 || !dwarf_strict))
13300 list_ret = loc_list_from_tree (TREE_OPERAND (obj, 0), 0);
13305 /* Variable offset. */
13306 list_ret1 = loc_list_from_tree (offset, 0);
13307 if (list_ret1 == 0)
13309 add_loc_list (&list_ret, list_ret1);
13312 add_loc_descr_to_each (list_ret,
13313 new_loc_descr (DW_OP_plus, 0, 0));
13315 bytepos = bitpos / BITS_PER_UNIT;
13317 add_loc_descr_to_each (list_ret,
13318 new_loc_descr (DW_OP_plus_uconst,
13320 else if (bytepos < 0)
13321 loc_list_plus_const (list_ret, bytepos);
13322 add_loc_descr_to_each (list_ret,
13323 new_loc_descr (DW_OP_stack_value, 0, 0));
13329 /* Generate Dwarf location list representing LOC.
13330 If WANT_ADDRESS is false, expression computing LOC will be computed
13331 If WANT_ADDRESS is 1, expression computing address of LOC will be returned
13332 if WANT_ADDRESS is 2, expression computing address useable in location
13333 will be returned (i.e. DW_OP_reg can be used
13334 to refer to register values). */
13336 static dw_loc_list_ref
13337 loc_list_from_tree (tree loc, int want_address)
13339 dw_loc_descr_ref ret = NULL, ret1 = NULL;
13340 dw_loc_list_ref list_ret = NULL, list_ret1 = NULL;
13341 int have_address = 0;
13342 enum dwarf_location_atom op;
13344 /* ??? Most of the time we do not take proper care for sign/zero
13345 extending the values properly. Hopefully this won't be a real
13348 switch (TREE_CODE (loc))
13351 expansion_failed (loc, NULL_RTX, "ERROR_MARK");
13354 case PLACEHOLDER_EXPR:
13355 /* This case involves extracting fields from an object to determine the
13356 position of other fields. We don't try to encode this here. The
13357 only user of this is Ada, which encodes the needed information using
13358 the names of types. */
13359 expansion_failed (loc, NULL_RTX, "PLACEHOLDER_EXPR");
13363 expansion_failed (loc, NULL_RTX, "CALL_EXPR");
13364 /* There are no opcodes for these operations. */
13367 case PREINCREMENT_EXPR:
13368 case PREDECREMENT_EXPR:
13369 case POSTINCREMENT_EXPR:
13370 case POSTDECREMENT_EXPR:
13371 expansion_failed (loc, NULL_RTX, "PRE/POST INDCREMENT/DECREMENT");
13372 /* There are no opcodes for these operations. */
13376 /* If we already want an address, see if there is INDIRECT_REF inside
13377 e.g. for &this->field. */
13380 list_ret = loc_list_for_address_of_addr_expr_of_indirect_ref
13381 (loc, want_address == 2);
13384 else if (decl_address_ip_invariant_p (TREE_OPERAND (loc, 0))
13385 && (ret = cst_pool_loc_descr (loc)))
13388 /* Otherwise, process the argument and look for the address. */
13389 if (!list_ret && !ret)
13390 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 1);
13394 expansion_failed (loc, NULL_RTX, "need address of ADDR_EXPR");
13400 if (DECL_THREAD_LOCAL_P (loc))
13403 enum dwarf_location_atom first_op;
13404 enum dwarf_location_atom second_op;
13405 bool dtprel = false;
13407 if (targetm.have_tls)
13409 /* If this is not defined, we have no way to emit the
13411 if (!targetm.asm_out.output_dwarf_dtprel)
13414 /* The way DW_OP_GNU_push_tls_address is specified, we
13415 can only look up addresses of objects in the current
13416 module. We used DW_OP_addr as first op, but that's
13417 wrong, because DW_OP_addr is relocated by the debug
13418 info consumer, while DW_OP_GNU_push_tls_address
13419 operand shouldn't be. */
13420 if (DECL_EXTERNAL (loc) && !targetm.binds_local_p (loc))
13422 first_op = DWARF2_ADDR_SIZE == 4 ? DW_OP_const4u : DW_OP_const8u;
13424 second_op = DW_OP_GNU_push_tls_address;
13428 if (!targetm.emutls.debug_form_tls_address
13429 || !(dwarf_version >= 3 || !dwarf_strict))
13431 /* We stuffed the control variable into the DECL_VALUE_EXPR
13432 to signal (via DECL_HAS_VALUE_EXPR_P) that the decl should
13433 no longer appear in gimple code. We used the control
13434 variable in specific so that we could pick it up here. */
13435 loc = DECL_VALUE_EXPR (loc);
13436 first_op = DW_OP_addr;
13437 second_op = DW_OP_form_tls_address;
13440 rtl = rtl_for_decl_location (loc);
13441 if (rtl == NULL_RTX)
13446 rtl = XEXP (rtl, 0);
13447 if (! CONSTANT_P (rtl))
13450 ret = new_loc_descr (first_op, 0, 0);
13451 ret->dw_loc_oprnd1.val_class = dw_val_class_addr;
13452 ret->dw_loc_oprnd1.v.val_addr = rtl;
13453 ret->dtprel = dtprel;
13455 ret1 = new_loc_descr (second_op, 0, 0);
13456 add_loc_descr (&ret, ret1);
13465 if (DECL_HAS_VALUE_EXPR_P (loc))
13466 return loc_list_from_tree (DECL_VALUE_EXPR (loc),
13470 case FUNCTION_DECL:
13473 var_loc_list *loc_list = lookup_decl_loc (loc);
13475 if (loc_list && loc_list->first)
13477 list_ret = dw_loc_list (loc_list, loc, want_address);
13478 have_address = want_address != 0;
13481 rtl = rtl_for_decl_location (loc);
13482 if (rtl == NULL_RTX)
13484 expansion_failed (loc, NULL_RTX, "DECL has no RTL");
13487 else if (CONST_INT_P (rtl))
13489 HOST_WIDE_INT val = INTVAL (rtl);
13490 if (TYPE_UNSIGNED (TREE_TYPE (loc)))
13491 val &= GET_MODE_MASK (DECL_MODE (loc));
13492 ret = int_loc_descriptor (val);
13494 else if (GET_CODE (rtl) == CONST_STRING)
13496 expansion_failed (loc, NULL_RTX, "CONST_STRING");
13499 else if (CONSTANT_P (rtl) && const_ok_for_output (rtl))
13501 ret = new_loc_descr (DW_OP_addr, 0, 0);
13502 ret->dw_loc_oprnd1.val_class = dw_val_class_addr;
13503 ret->dw_loc_oprnd1.v.val_addr = rtl;
13507 enum machine_mode mode, mem_mode;
13509 /* Certain constructs can only be represented at top-level. */
13510 if (want_address == 2)
13512 ret = loc_descriptor (rtl, VOIDmode,
13513 VAR_INIT_STATUS_INITIALIZED);
13518 mode = GET_MODE (rtl);
13519 mem_mode = VOIDmode;
13523 mode = get_address_mode (rtl);
13524 rtl = XEXP (rtl, 0);
13527 ret = mem_loc_descriptor (rtl, mode, mem_mode,
13528 VAR_INIT_STATUS_INITIALIZED);
13531 expansion_failed (loc, rtl,
13532 "failed to produce loc descriptor for rtl");
13539 if (!integer_zerop (TREE_OPERAND (loc, 1)))
13543 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 0);
13547 case COMPOUND_EXPR:
13548 return loc_list_from_tree (TREE_OPERAND (loc, 1), want_address);
13551 case VIEW_CONVERT_EXPR:
13554 return loc_list_from_tree (TREE_OPERAND (loc, 0), want_address);
13556 case COMPONENT_REF:
13557 case BIT_FIELD_REF:
13559 case ARRAY_RANGE_REF:
13560 case REALPART_EXPR:
13561 case IMAGPART_EXPR:
13564 HOST_WIDE_INT bitsize, bitpos, bytepos;
13565 enum machine_mode mode;
13567 int unsignedp = TYPE_UNSIGNED (TREE_TYPE (loc));
13569 obj = get_inner_reference (loc, &bitsize, &bitpos, &offset, &mode,
13570 &unsignedp, &volatilep, false);
13572 gcc_assert (obj != loc);
13574 list_ret = loc_list_from_tree (obj,
13576 && !bitpos && !offset ? 2 : 1);
13577 /* TODO: We can extract value of the small expression via shifting even
13578 for nonzero bitpos. */
13581 if (bitpos % BITS_PER_UNIT != 0 || bitsize % BITS_PER_UNIT != 0)
13583 expansion_failed (loc, NULL_RTX,
13584 "bitfield access");
13588 if (offset != NULL_TREE)
13590 /* Variable offset. */
13591 list_ret1 = loc_list_from_tree (offset, 0);
13592 if (list_ret1 == 0)
13594 add_loc_list (&list_ret, list_ret1);
13597 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_plus, 0, 0));
13600 bytepos = bitpos / BITS_PER_UNIT;
13602 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_plus_uconst, bytepos, 0));
13603 else if (bytepos < 0)
13604 loc_list_plus_const (list_ret, bytepos);
13611 if ((want_address || !host_integerp (loc, 0))
13612 && (ret = cst_pool_loc_descr (loc)))
13614 else if (want_address == 2
13615 && host_integerp (loc, 0)
13616 && (ret = address_of_int_loc_descriptor
13617 (int_size_in_bytes (TREE_TYPE (loc)),
13618 tree_low_cst (loc, 0))))
13620 else if (host_integerp (loc, 0))
13621 ret = int_loc_descriptor (tree_low_cst (loc, 0));
13624 expansion_failed (loc, NULL_RTX,
13625 "Integer operand is not host integer");
13634 if ((ret = cst_pool_loc_descr (loc)))
13637 /* We can construct small constants here using int_loc_descriptor. */
13638 expansion_failed (loc, NULL_RTX,
13639 "constructor or constant not in constant pool");
13642 case TRUTH_AND_EXPR:
13643 case TRUTH_ANDIF_EXPR:
13648 case TRUTH_XOR_EXPR:
13653 case TRUTH_OR_EXPR:
13654 case TRUTH_ORIF_EXPR:
13659 case FLOOR_DIV_EXPR:
13660 case CEIL_DIV_EXPR:
13661 case ROUND_DIV_EXPR:
13662 case TRUNC_DIV_EXPR:
13663 if (TYPE_UNSIGNED (TREE_TYPE (loc)))
13672 case FLOOR_MOD_EXPR:
13673 case CEIL_MOD_EXPR:
13674 case ROUND_MOD_EXPR:
13675 case TRUNC_MOD_EXPR:
13676 if (TYPE_UNSIGNED (TREE_TYPE (loc)))
13681 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 0);
13682 list_ret1 = loc_list_from_tree (TREE_OPERAND (loc, 1), 0);
13683 if (list_ret == 0 || list_ret1 == 0)
13686 add_loc_list (&list_ret, list_ret1);
13689 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_over, 0, 0));
13690 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_over, 0, 0));
13691 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_div, 0, 0));
13692 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_mul, 0, 0));
13693 add_loc_descr_to_each (list_ret, new_loc_descr (DW_OP_minus, 0, 0));
13705 op = (TYPE_UNSIGNED (TREE_TYPE (loc)) ? DW_OP_shr : DW_OP_shra);
13708 case POINTER_PLUS_EXPR:
13710 if (host_integerp (TREE_OPERAND (loc, 1), 0))
13712 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 0);
13716 loc_list_plus_const (list_ret, tree_low_cst (TREE_OPERAND (loc, 1), 0));
13724 if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0))))
13731 if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0))))
13738 if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0))))
13745 if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (loc, 0))))
13760 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 0);
13761 list_ret1 = loc_list_from_tree (TREE_OPERAND (loc, 1), 0);
13762 if (list_ret == 0 || list_ret1 == 0)
13765 add_loc_list (&list_ret, list_ret1);
13768 add_loc_descr_to_each (list_ret, new_loc_descr (op, 0, 0));
13771 case TRUTH_NOT_EXPR:
13785 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 0);
13789 add_loc_descr_to_each (list_ret, new_loc_descr (op, 0, 0));
13795 const enum tree_code code =
13796 TREE_CODE (loc) == MIN_EXPR ? GT_EXPR : LT_EXPR;
13798 loc = build3 (COND_EXPR, TREE_TYPE (loc),
13799 build2 (code, integer_type_node,
13800 TREE_OPERAND (loc, 0), TREE_OPERAND (loc, 1)),
13801 TREE_OPERAND (loc, 1), TREE_OPERAND (loc, 0));
13804 /* ... fall through ... */
13808 dw_loc_descr_ref lhs
13809 = loc_descriptor_from_tree (TREE_OPERAND (loc, 1), 0);
13810 dw_loc_list_ref rhs
13811 = loc_list_from_tree (TREE_OPERAND (loc, 2), 0);
13812 dw_loc_descr_ref bra_node, jump_node, tmp;
13814 list_ret = loc_list_from_tree (TREE_OPERAND (loc, 0), 0);
13815 if (list_ret == 0 || lhs == 0 || rhs == 0)
13818 bra_node = new_loc_descr (DW_OP_bra, 0, 0);
13819 add_loc_descr_to_each (list_ret, bra_node);
13821 add_loc_list (&list_ret, rhs);
13822 jump_node = new_loc_descr (DW_OP_skip, 0, 0);
13823 add_loc_descr_to_each (list_ret, jump_node);
13825 add_loc_descr_to_each (list_ret, lhs);
13826 bra_node->dw_loc_oprnd1.val_class = dw_val_class_loc;
13827 bra_node->dw_loc_oprnd1.v.val_loc = lhs;
13829 /* ??? Need a node to point the skip at. Use a nop. */
13830 tmp = new_loc_descr (DW_OP_nop, 0, 0);
13831 add_loc_descr_to_each (list_ret, tmp);
13832 jump_node->dw_loc_oprnd1.val_class = dw_val_class_loc;
13833 jump_node->dw_loc_oprnd1.v.val_loc = tmp;
13837 case FIX_TRUNC_EXPR:
13841 /* Leave front-end specific codes as simply unknown. This comes
13842 up, for instance, with the C STMT_EXPR. */
13843 if ((unsigned int) TREE_CODE (loc)
13844 >= (unsigned int) LAST_AND_UNUSED_TREE_CODE)
13846 expansion_failed (loc, NULL_RTX,
13847 "language specific tree node");
13851 #ifdef ENABLE_CHECKING
13852 /* Otherwise this is a generic code; we should just lists all of
13853 these explicitly. We forgot one. */
13854 gcc_unreachable ();
13856 /* In a release build, we want to degrade gracefully: better to
13857 generate incomplete debugging information than to crash. */
13862 if (!ret && !list_ret)
13865 if (want_address == 2 && !have_address
13866 && (dwarf_version >= 4 || !dwarf_strict))
13868 if (int_size_in_bytes (TREE_TYPE (loc)) > DWARF2_ADDR_SIZE)
13870 expansion_failed (loc, NULL_RTX,
13871 "DWARF address size mismatch");
13875 add_loc_descr (&ret, new_loc_descr (DW_OP_stack_value, 0, 0));
13877 add_loc_descr_to_each (list_ret,
13878 new_loc_descr (DW_OP_stack_value, 0, 0));
13881 /* Show if we can't fill the request for an address. */
13882 if (want_address && !have_address)
13884 expansion_failed (loc, NULL_RTX,
13885 "Want address and only have value");
13889 gcc_assert (!ret || !list_ret);
13891 /* If we've got an address and don't want one, dereference. */
13892 if (!want_address && have_address)
13894 HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (loc));
13896 if (size > DWARF2_ADDR_SIZE || size == -1)
13898 expansion_failed (loc, NULL_RTX,
13899 "DWARF address size mismatch");
13902 else if (size == DWARF2_ADDR_SIZE)
13905 op = DW_OP_deref_size;
13908 add_loc_descr (&ret, new_loc_descr (op, size, 0));
13910 add_loc_descr_to_each (list_ret, new_loc_descr (op, size, 0));
13913 list_ret = new_loc_list (ret, NULL, NULL, NULL);
13918 /* Same as above but return only single location expression. */
13919 static dw_loc_descr_ref
13920 loc_descriptor_from_tree (tree loc, int want_address)
13922 dw_loc_list_ref ret = loc_list_from_tree (loc, want_address);
13925 if (ret->dw_loc_next)
13927 expansion_failed (loc, NULL_RTX,
13928 "Location list where only loc descriptor needed");
13934 /* Given a value, round it up to the lowest multiple of `boundary'
13935 which is not less than the value itself. */
13937 static inline HOST_WIDE_INT
13938 ceiling (HOST_WIDE_INT value, unsigned int boundary)
13940 return (((value + boundary - 1) / boundary) * boundary);
13943 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
13944 pointer to the declared type for the relevant field variable, or return
13945 `integer_type_node' if the given node turns out to be an
13946 ERROR_MARK node. */
13949 field_type (const_tree decl)
13953 if (TREE_CODE (decl) == ERROR_MARK)
13954 return integer_type_node;
13956 type = DECL_BIT_FIELD_TYPE (decl);
13957 if (type == NULL_TREE)
13958 type = TREE_TYPE (decl);
13963 /* Given a pointer to a tree node, return the alignment in bits for
13964 it, or else return BITS_PER_WORD if the node actually turns out to
13965 be an ERROR_MARK node. */
13967 static inline unsigned
13968 simple_type_align_in_bits (const_tree type)
13970 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
13973 static inline unsigned
13974 simple_decl_align_in_bits (const_tree decl)
13976 return (TREE_CODE (decl) != ERROR_MARK) ? DECL_ALIGN (decl) : BITS_PER_WORD;
13979 /* Return the result of rounding T up to ALIGN. */
13981 static inline double_int
13982 round_up_to_align (double_int t, unsigned int align)
13984 double_int alignd = uhwi_to_double_int (align);
13985 t = double_int_add (t, alignd);
13986 t = double_int_add (t, double_int_minus_one);
13987 t = double_int_div (t, alignd, true, TRUNC_DIV_EXPR);
13988 t = double_int_mul (t, alignd);
13992 /* Given a pointer to a FIELD_DECL, compute and return the byte offset of the
13993 lowest addressed byte of the "containing object" for the given FIELD_DECL,
13994 or return 0 if we are unable to determine what that offset is, either
13995 because the argument turns out to be a pointer to an ERROR_MARK node, or
13996 because the offset is actually variable. (We can't handle the latter case
13999 static HOST_WIDE_INT
14000 field_byte_offset (const_tree decl)
14002 double_int object_offset_in_bits;
14003 double_int object_offset_in_bytes;
14004 double_int bitpos_int;
14006 if (TREE_CODE (decl) == ERROR_MARK)
14009 gcc_assert (TREE_CODE (decl) == FIELD_DECL);
14011 /* We cannot yet cope with fields whose positions are variable, so
14012 for now, when we see such things, we simply return 0. Someday, we may
14013 be able to handle such cases, but it will be damn difficult. */
14014 if (TREE_CODE (bit_position (decl)) != INTEGER_CST)
14017 bitpos_int = tree_to_double_int (bit_position (decl));
14019 #ifdef PCC_BITFIELD_TYPE_MATTERS
14020 if (PCC_BITFIELD_TYPE_MATTERS)
14023 tree field_size_tree;
14024 double_int deepest_bitpos;
14025 double_int field_size_in_bits;
14026 unsigned int type_align_in_bits;
14027 unsigned int decl_align_in_bits;
14028 double_int type_size_in_bits;
14030 type = field_type (decl);
14031 type_size_in_bits = double_int_type_size_in_bits (type);
14032 type_align_in_bits = simple_type_align_in_bits (type);
14034 field_size_tree = DECL_SIZE (decl);
14036 /* The size could be unspecified if there was an error, or for
14037 a flexible array member. */
14038 if (!field_size_tree)
14039 field_size_tree = bitsize_zero_node;
14041 /* If the size of the field is not constant, use the type size. */
14042 if (TREE_CODE (field_size_tree) == INTEGER_CST)
14043 field_size_in_bits = tree_to_double_int (field_size_tree);
14045 field_size_in_bits = type_size_in_bits;
14047 decl_align_in_bits = simple_decl_align_in_bits (decl);
14049 /* The GCC front-end doesn't make any attempt to keep track of the
14050 starting bit offset (relative to the start of the containing
14051 structure type) of the hypothetical "containing object" for a
14052 bit-field. Thus, when computing the byte offset value for the
14053 start of the "containing object" of a bit-field, we must deduce
14054 this information on our own. This can be rather tricky to do in
14055 some cases. For example, handling the following structure type
14056 definition when compiling for an i386/i486 target (which only
14057 aligns long long's to 32-bit boundaries) can be very tricky:
14059 struct S { int field1; long long field2:31; };
14061 Fortunately, there is a simple rule-of-thumb which can be used
14062 in such cases. When compiling for an i386/i486, GCC will
14063 allocate 8 bytes for the structure shown above. It decides to
14064 do this based upon one simple rule for bit-field allocation.
14065 GCC allocates each "containing object" for each bit-field at
14066 the first (i.e. lowest addressed) legitimate alignment boundary
14067 (based upon the required minimum alignment for the declared
14068 type of the field) which it can possibly use, subject to the
14069 condition that there is still enough available space remaining
14070 in the containing object (when allocated at the selected point)
14071 to fully accommodate all of the bits of the bit-field itself.
14073 This simple rule makes it obvious why GCC allocates 8 bytes for
14074 each object of the structure type shown above. When looking
14075 for a place to allocate the "containing object" for `field2',
14076 the compiler simply tries to allocate a 64-bit "containing
14077 object" at each successive 32-bit boundary (starting at zero)
14078 until it finds a place to allocate that 64- bit field such that
14079 at least 31 contiguous (and previously unallocated) bits remain
14080 within that selected 64 bit field. (As it turns out, for the
14081 example above, the compiler finds it is OK to allocate the
14082 "containing object" 64-bit field at bit-offset zero within the
14085 Here we attempt to work backwards from the limited set of facts
14086 we're given, and we try to deduce from those facts, where GCC
14087 must have believed that the containing object started (within
14088 the structure type). The value we deduce is then used (by the
14089 callers of this routine) to generate DW_AT_location and
14090 DW_AT_bit_offset attributes for fields (both bit-fields and, in
14091 the case of DW_AT_location, regular fields as well). */
14093 /* Figure out the bit-distance from the start of the structure to
14094 the "deepest" bit of the bit-field. */
14095 deepest_bitpos = double_int_add (bitpos_int, field_size_in_bits);
14097 /* This is the tricky part. Use some fancy footwork to deduce
14098 where the lowest addressed bit of the containing object must
14100 object_offset_in_bits
14101 = double_int_sub (deepest_bitpos, type_size_in_bits);
14103 /* Round up to type_align by default. This works best for
14105 object_offset_in_bits
14106 = round_up_to_align (object_offset_in_bits, type_align_in_bits);
14108 if (double_int_ucmp (object_offset_in_bits, bitpos_int) > 0)
14110 object_offset_in_bits
14111 = double_int_sub (deepest_bitpos, type_size_in_bits);
14113 /* Round up to decl_align instead. */
14114 object_offset_in_bits
14115 = round_up_to_align (object_offset_in_bits, decl_align_in_bits);
14119 #endif /* PCC_BITFIELD_TYPE_MATTERS */
14120 object_offset_in_bits = bitpos_int;
14122 object_offset_in_bytes
14123 = double_int_div (object_offset_in_bits,
14124 uhwi_to_double_int (BITS_PER_UNIT), true,
14126 return double_int_to_shwi (object_offset_in_bytes);
14129 /* The following routines define various Dwarf attributes and any data
14130 associated with them. */
14132 /* Add a location description attribute value to a DIE.
14134 This emits location attributes suitable for whole variables and
14135 whole parameters. Note that the location attributes for struct fields are
14136 generated by the routine `data_member_location_attribute' below. */
14139 add_AT_location_description (dw_die_ref die, enum dwarf_attribute attr_kind,
14140 dw_loc_list_ref descr)
14144 if (single_element_loc_list_p (descr))
14145 add_AT_loc (die, attr_kind, descr->expr);
14147 add_AT_loc_list (die, attr_kind, descr);
14150 /* Add DW_AT_accessibility attribute to DIE if needed. */
14153 add_accessibility_attribute (dw_die_ref die, tree decl)
14155 /* In DWARF3+ the default is DW_ACCESS_private only in DW_TAG_class_type
14156 children, otherwise the default is DW_ACCESS_public. In DWARF2
14157 the default has always been DW_ACCESS_public. */
14158 if (TREE_PROTECTED (decl))
14159 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
14160 else if (TREE_PRIVATE (decl))
14162 if (dwarf_version == 2
14163 || die->die_parent == NULL
14164 || die->die_parent->die_tag != DW_TAG_class_type)
14165 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_private);
14167 else if (dwarf_version > 2
14169 && die->die_parent->die_tag == DW_TAG_class_type)
14170 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
14173 /* Attach the specialized form of location attribute used for data members of
14174 struct and union types. In the special case of a FIELD_DECL node which
14175 represents a bit-field, the "offset" part of this special location
14176 descriptor must indicate the distance in bytes from the lowest-addressed
14177 byte of the containing struct or union type to the lowest-addressed byte of
14178 the "containing object" for the bit-field. (See the `field_byte_offset'
14181 For any given bit-field, the "containing object" is a hypothetical object
14182 (of some integral or enum type) within which the given bit-field lives. The
14183 type of this hypothetical "containing object" is always the same as the
14184 declared type of the individual bit-field itself (for GCC anyway... the
14185 DWARF spec doesn't actually mandate this). Note that it is the size (in
14186 bytes) of the hypothetical "containing object" which will be given in the
14187 DW_AT_byte_size attribute for this bit-field. (See the
14188 `byte_size_attribute' function below.) It is also used when calculating the
14189 value of the DW_AT_bit_offset attribute. (See the `bit_offset_attribute'
14190 function below.) */
14193 add_data_member_location_attribute (dw_die_ref die, tree decl)
14195 HOST_WIDE_INT offset;
14196 dw_loc_descr_ref loc_descr = 0;
14198 if (TREE_CODE (decl) == TREE_BINFO)
14200 /* We're working on the TAG_inheritance for a base class. */
14201 if (BINFO_VIRTUAL_P (decl) && is_cxx ())
14203 /* For C++ virtual bases we can't just use BINFO_OFFSET, as they
14204 aren't at a fixed offset from all (sub)objects of the same
14205 type. We need to extract the appropriate offset from our
14206 vtable. The following dwarf expression means
14208 BaseAddr = ObAddr + *((*ObAddr) - Offset)
14210 This is specific to the V3 ABI, of course. */
14212 dw_loc_descr_ref tmp;
14214 /* Make a copy of the object address. */
14215 tmp = new_loc_descr (DW_OP_dup, 0, 0);
14216 add_loc_descr (&loc_descr, tmp);
14218 /* Extract the vtable address. */
14219 tmp = new_loc_descr (DW_OP_deref, 0, 0);
14220 add_loc_descr (&loc_descr, tmp);
14222 /* Calculate the address of the offset. */
14223 offset = tree_low_cst (BINFO_VPTR_FIELD (decl), 0);
14224 gcc_assert (offset < 0);
14226 tmp = int_loc_descriptor (-offset);
14227 add_loc_descr (&loc_descr, tmp);
14228 tmp = new_loc_descr (DW_OP_minus, 0, 0);
14229 add_loc_descr (&loc_descr, tmp);
14231 /* Extract the offset. */
14232 tmp = new_loc_descr (DW_OP_deref, 0, 0);
14233 add_loc_descr (&loc_descr, tmp);
14235 /* Add it to the object address. */
14236 tmp = new_loc_descr (DW_OP_plus, 0, 0);
14237 add_loc_descr (&loc_descr, tmp);
14240 offset = tree_low_cst (BINFO_OFFSET (decl), 0);
14243 offset = field_byte_offset (decl);
14247 if (dwarf_version > 2)
14249 /* Don't need to output a location expression, just the constant. */
14251 add_AT_int (die, DW_AT_data_member_location, offset);
14253 add_AT_unsigned (die, DW_AT_data_member_location, offset);
14258 enum dwarf_location_atom op;
14260 /* The DWARF2 standard says that we should assume that the structure
14261 address is already on the stack, so we can specify a structure
14262 field address by using DW_OP_plus_uconst. */
14264 #ifdef MIPS_DEBUGGING_INFO
14265 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst
14266 operator correctly. It works only if we leave the offset on the
14270 op = DW_OP_plus_uconst;
14273 loc_descr = new_loc_descr (op, offset, 0);
14277 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
14280 /* Writes integer values to dw_vec_const array. */
14283 insert_int (HOST_WIDE_INT val, unsigned int size, unsigned char *dest)
14287 *dest++ = val & 0xff;
14293 /* Reads integers from dw_vec_const array. Inverse of insert_int. */
14295 static HOST_WIDE_INT
14296 extract_int (const unsigned char *src, unsigned int size)
14298 HOST_WIDE_INT val = 0;
14304 val |= *--src & 0xff;
14310 /* Writes double_int values to dw_vec_const array. */
14313 insert_double (double_int val, unsigned char *dest)
14315 unsigned char *p0 = dest;
14316 unsigned char *p1 = dest + sizeof (HOST_WIDE_INT);
14318 if (WORDS_BIG_ENDIAN)
14324 insert_int ((HOST_WIDE_INT) val.low, sizeof (HOST_WIDE_INT), p0);
14325 insert_int ((HOST_WIDE_INT) val.high, sizeof (HOST_WIDE_INT), p1);
14328 /* Writes floating point values to dw_vec_const array. */
14331 insert_float (const_rtx rtl, unsigned char *array)
14333 REAL_VALUE_TYPE rv;
14337 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
14338 real_to_target (val, &rv, GET_MODE (rtl));
14340 /* real_to_target puts 32-bit pieces in each long. Pack them. */
14341 for (i = 0; i < GET_MODE_SIZE (GET_MODE (rtl)) / 4; i++)
14343 insert_int (val[i], 4, array);
14348 /* Attach a DW_AT_const_value attribute for a variable or a parameter which
14349 does not have a "location" either in memory or in a register. These
14350 things can arise in GNU C when a constant is passed as an actual parameter
14351 to an inlined function. They can also arise in C++ where declared
14352 constants do not necessarily get memory "homes". */
14355 add_const_value_attribute (dw_die_ref die, rtx rtl)
14357 switch (GET_CODE (rtl))
14361 HOST_WIDE_INT val = INTVAL (rtl);
14364 add_AT_int (die, DW_AT_const_value, val);
14366 add_AT_unsigned (die, DW_AT_const_value, (unsigned HOST_WIDE_INT) val);
14371 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
14372 floating-point constant. A CONST_DOUBLE is used whenever the
14373 constant requires more than one word in order to be adequately
14376 enum machine_mode mode = GET_MODE (rtl);
14378 if (SCALAR_FLOAT_MODE_P (mode))
14380 unsigned int length = GET_MODE_SIZE (mode);
14381 unsigned char *array = (unsigned char *) ggc_alloc_atomic (length);
14383 insert_float (rtl, array);
14384 add_AT_vec (die, DW_AT_const_value, length / 4, 4, array);
14387 add_AT_double (die, DW_AT_const_value,
14388 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
14394 enum machine_mode mode = GET_MODE (rtl);
14395 unsigned int elt_size = GET_MODE_UNIT_SIZE (mode);
14396 unsigned int length = CONST_VECTOR_NUNITS (rtl);
14397 unsigned char *array = (unsigned char *) ggc_alloc_atomic
14398 (length * elt_size);
14402 switch (GET_MODE_CLASS (mode))
14404 case MODE_VECTOR_INT:
14405 for (i = 0, p = array; i < length; i++, p += elt_size)
14407 rtx elt = CONST_VECTOR_ELT (rtl, i);
14408 double_int val = rtx_to_double_int (elt);
14410 if (elt_size <= sizeof (HOST_WIDE_INT))
14411 insert_int (double_int_to_shwi (val), elt_size, p);
14414 gcc_assert (elt_size == 2 * sizeof (HOST_WIDE_INT));
14415 insert_double (val, p);
14420 case MODE_VECTOR_FLOAT:
14421 for (i = 0, p = array; i < length; i++, p += elt_size)
14423 rtx elt = CONST_VECTOR_ELT (rtl, i);
14424 insert_float (elt, p);
14429 gcc_unreachable ();
14432 add_AT_vec (die, DW_AT_const_value, length, elt_size, array);
14437 if (dwarf_version >= 4 || !dwarf_strict)
14439 dw_loc_descr_ref loc_result;
14440 resolve_one_addr (&rtl, NULL);
14442 loc_result = new_loc_descr (DW_OP_addr, 0, 0);
14443 loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
14444 loc_result->dw_loc_oprnd1.v.val_addr = rtl;
14445 add_loc_descr (&loc_result, new_loc_descr (DW_OP_stack_value, 0, 0));
14446 add_AT_loc (die, DW_AT_location, loc_result);
14447 VEC_safe_push (rtx, gc, used_rtx_array, rtl);
14453 if (CONSTANT_P (XEXP (rtl, 0)))
14454 return add_const_value_attribute (die, XEXP (rtl, 0));
14457 if (!const_ok_for_output (rtl))
14460 if (dwarf_version >= 4 || !dwarf_strict)
14465 /* In cases where an inlined instance of an inline function is passed
14466 the address of an `auto' variable (which is local to the caller) we
14467 can get a situation where the DECL_RTL of the artificial local
14468 variable (for the inlining) which acts as a stand-in for the
14469 corresponding formal parameter (of the inline function) will look
14470 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
14471 exactly a compile-time constant expression, but it isn't the address
14472 of the (artificial) local variable either. Rather, it represents the
14473 *value* which the artificial local variable always has during its
14474 lifetime. We currently have no way to represent such quasi-constant
14475 values in Dwarf, so for now we just punt and generate nothing. */
14483 if (GET_CODE (XEXP (rtl, 0)) == CONST_STRING
14484 && MEM_READONLY_P (rtl)
14485 && GET_MODE (rtl) == BLKmode)
14487 add_AT_string (die, DW_AT_const_value, XSTR (XEXP (rtl, 0), 0));
14493 /* No other kinds of rtx should be possible here. */
14494 gcc_unreachable ();
14499 /* Determine whether the evaluation of EXPR references any variables
14500 or functions which aren't otherwise used (and therefore may not be
14503 reference_to_unused (tree * tp, int * walk_subtrees,
14504 void * data ATTRIBUTE_UNUSED)
14506 if (! EXPR_P (*tp) && ! CONSTANT_CLASS_P (*tp))
14507 *walk_subtrees = 0;
14509 if (DECL_P (*tp) && ! TREE_PUBLIC (*tp) && ! TREE_USED (*tp)
14510 && ! TREE_ASM_WRITTEN (*tp))
14512 /* ??? The C++ FE emits debug information for using decls, so
14513 putting gcc_unreachable here falls over. See PR31899. For now
14514 be conservative. */
14515 else if (!cgraph_global_info_ready
14516 && (TREE_CODE (*tp) == VAR_DECL || TREE_CODE (*tp) == FUNCTION_DECL))
14518 else if (TREE_CODE (*tp) == VAR_DECL)
14520 struct varpool_node *node = varpool_get_node (*tp);
14521 if (!node || !node->needed)
14524 else if (TREE_CODE (*tp) == FUNCTION_DECL
14525 && (!DECL_EXTERNAL (*tp) || DECL_DECLARED_INLINE_P (*tp)))
14527 /* The call graph machinery must have finished analyzing,
14528 optimizing and gimplifying the CU by now.
14529 So if *TP has no call graph node associated
14530 to it, it means *TP will not be emitted. */
14531 if (!cgraph_get_node (*tp))
14534 else if (TREE_CODE (*tp) == STRING_CST && !TREE_ASM_WRITTEN (*tp))
14540 /* Generate an RTL constant from a decl initializer INIT with decl type TYPE,
14541 for use in a later add_const_value_attribute call. */
14544 rtl_for_decl_init (tree init, tree type)
14546 rtx rtl = NULL_RTX;
14550 /* If a variable is initialized with a string constant without embedded
14551 zeros, build CONST_STRING. */
14552 if (TREE_CODE (init) == STRING_CST && TREE_CODE (type) == ARRAY_TYPE)
14554 tree enttype = TREE_TYPE (type);
14555 tree domain = TYPE_DOMAIN (type);
14556 enum machine_mode mode = TYPE_MODE (enttype);
14558 if (GET_MODE_CLASS (mode) == MODE_INT && GET_MODE_SIZE (mode) == 1
14560 && integer_zerop (TYPE_MIN_VALUE (domain))
14561 && compare_tree_int (TYPE_MAX_VALUE (domain),
14562 TREE_STRING_LENGTH (init) - 1) == 0
14563 && ((size_t) TREE_STRING_LENGTH (init)
14564 == strlen (TREE_STRING_POINTER (init)) + 1))
14566 rtl = gen_rtx_CONST_STRING (VOIDmode,
14567 ggc_strdup (TREE_STRING_POINTER (init)));
14568 rtl = gen_rtx_MEM (BLKmode, rtl);
14569 MEM_READONLY_P (rtl) = 1;
14572 /* Other aggregates, and complex values, could be represented using
14574 else if (AGGREGATE_TYPE_P (type)
14575 || (TREE_CODE (init) == VIEW_CONVERT_EXPR
14576 && AGGREGATE_TYPE_P (TREE_TYPE (TREE_OPERAND (init, 0))))
14577 || TREE_CODE (type) == COMPLEX_TYPE)
14579 /* Vectors only work if their mode is supported by the target.
14580 FIXME: generic vectors ought to work too. */
14581 else if (TREE_CODE (type) == VECTOR_TYPE
14582 && !VECTOR_MODE_P (TYPE_MODE (type)))
14584 /* If the initializer is something that we know will expand into an
14585 immediate RTL constant, expand it now. We must be careful not to
14586 reference variables which won't be output. */
14587 else if (initializer_constant_valid_p (init, type)
14588 && ! walk_tree (&init, reference_to_unused, NULL, NULL))
14590 /* Convert vector CONSTRUCTOR initializers to VECTOR_CST if
14592 if (TREE_CODE (type) == VECTOR_TYPE)
14593 switch (TREE_CODE (init))
14598 if (TREE_CONSTANT (init))
14600 VEC(constructor_elt,gc) *elts = CONSTRUCTOR_ELTS (init);
14601 bool constant_p = true;
14603 unsigned HOST_WIDE_INT ix;
14605 /* Even when ctor is constant, it might contain non-*_CST
14606 elements (e.g. { 1.0/0.0 - 1.0/0.0, 0.0 }) and those don't
14607 belong into VECTOR_CST nodes. */
14608 FOR_EACH_CONSTRUCTOR_VALUE (elts, ix, value)
14609 if (!CONSTANT_CLASS_P (value))
14611 constant_p = false;
14617 init = build_vector_from_ctor (type, elts);
14627 rtl = expand_expr (init, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);
14629 /* If expand_expr returns a MEM, it wasn't immediate. */
14630 gcc_assert (!rtl || !MEM_P (rtl));
14636 /* Generate RTL for the variable DECL to represent its location. */
14639 rtl_for_decl_location (tree decl)
14643 /* Here we have to decide where we are going to say the parameter "lives"
14644 (as far as the debugger is concerned). We only have a couple of
14645 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
14647 DECL_RTL normally indicates where the parameter lives during most of the
14648 activation of the function. If optimization is enabled however, this
14649 could be either NULL or else a pseudo-reg. Both of those cases indicate
14650 that the parameter doesn't really live anywhere (as far as the code
14651 generation parts of GCC are concerned) during most of the function's
14652 activation. That will happen (for example) if the parameter is never
14653 referenced within the function.
14655 We could just generate a location descriptor here for all non-NULL
14656 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
14657 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
14658 where DECL_RTL is NULL or is a pseudo-reg.
14660 Note however that we can only get away with using DECL_INCOMING_RTL as
14661 a backup substitute for DECL_RTL in certain limited cases. In cases
14662 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
14663 we can be sure that the parameter was passed using the same type as it is
14664 declared to have within the function, and that its DECL_INCOMING_RTL
14665 points us to a place where a value of that type is passed.
14667 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
14668 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
14669 because in these cases DECL_INCOMING_RTL points us to a value of some
14670 type which is *different* from the type of the parameter itself. Thus,
14671 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
14672 such cases, the debugger would end up (for example) trying to fetch a
14673 `float' from a place which actually contains the first part of a
14674 `double'. That would lead to really incorrect and confusing
14675 output at debug-time.
14677 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
14678 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
14679 are a couple of exceptions however. On little-endian machines we can
14680 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
14681 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
14682 an integral type that is smaller than TREE_TYPE (decl). These cases arise
14683 when (on a little-endian machine) a non-prototyped function has a
14684 parameter declared to be of type `short' or `char'. In such cases,
14685 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
14686 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
14687 passed `int' value. If the debugger then uses that address to fetch
14688 a `short' or a `char' (on a little-endian machine) the result will be
14689 the correct data, so we allow for such exceptional cases below.
14691 Note that our goal here is to describe the place where the given formal
14692 parameter lives during most of the function's activation (i.e. between the
14693 end of the prologue and the start of the epilogue). We'll do that as best
14694 as we can. Note however that if the given formal parameter is modified
14695 sometime during the execution of the function, then a stack backtrace (at
14696 debug-time) will show the function as having been called with the *new*
14697 value rather than the value which was originally passed in. This happens
14698 rarely enough that it is not a major problem, but it *is* a problem, and
14699 I'd like to fix it.
14701 A future version of dwarf2out.c may generate two additional attributes for
14702 any given DW_TAG_formal_parameter DIE which will describe the "passed
14703 type" and the "passed location" for the given formal parameter in addition
14704 to the attributes we now generate to indicate the "declared type" and the
14705 "active location" for each parameter. This additional set of attributes
14706 could be used by debuggers for stack backtraces. Separately, note that
14707 sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be NULL also.
14708 This happens (for example) for inlined-instances of inline function formal
14709 parameters which are never referenced. This really shouldn't be
14710 happening. All PARM_DECL nodes should get valid non-NULL
14711 DECL_INCOMING_RTL values. FIXME. */
14713 /* Use DECL_RTL as the "location" unless we find something better. */
14714 rtl = DECL_RTL_IF_SET (decl);
14716 /* When generating abstract instances, ignore everything except
14717 constants, symbols living in memory, and symbols living in
14718 fixed registers. */
14719 if (! reload_completed)
14722 && (CONSTANT_P (rtl)
14724 && CONSTANT_P (XEXP (rtl, 0)))
14726 && TREE_CODE (decl) == VAR_DECL
14727 && TREE_STATIC (decl))))
14729 rtl = targetm.delegitimize_address (rtl);
14734 else if (TREE_CODE (decl) == PARM_DECL)
14736 if (rtl == NULL_RTX
14737 || is_pseudo_reg (rtl)
14739 && is_pseudo_reg (XEXP (rtl, 0))
14740 && DECL_INCOMING_RTL (decl)
14741 && MEM_P (DECL_INCOMING_RTL (decl))
14742 && GET_MODE (rtl) == GET_MODE (DECL_INCOMING_RTL (decl))))
14744 tree declared_type = TREE_TYPE (decl);
14745 tree passed_type = DECL_ARG_TYPE (decl);
14746 enum machine_mode dmode = TYPE_MODE (declared_type);
14747 enum machine_mode pmode = TYPE_MODE (passed_type);
14749 /* This decl represents a formal parameter which was optimized out.
14750 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
14751 all cases where (rtl == NULL_RTX) just below. */
14752 if (dmode == pmode)
14753 rtl = DECL_INCOMING_RTL (decl);
14754 else if ((rtl == NULL_RTX || is_pseudo_reg (rtl))
14755 && SCALAR_INT_MODE_P (dmode)
14756 && GET_MODE_SIZE (dmode) <= GET_MODE_SIZE (pmode)
14757 && DECL_INCOMING_RTL (decl))
14759 rtx inc = DECL_INCOMING_RTL (decl);
14762 else if (MEM_P (inc))
14764 if (BYTES_BIG_ENDIAN)
14765 rtl = adjust_address_nv (inc, dmode,
14766 GET_MODE_SIZE (pmode)
14767 - GET_MODE_SIZE (dmode));
14774 /* If the parm was passed in registers, but lives on the stack, then
14775 make a big endian correction if the mode of the type of the
14776 parameter is not the same as the mode of the rtl. */
14777 /* ??? This is the same series of checks that are made in dbxout.c before
14778 we reach the big endian correction code there. It isn't clear if all
14779 of these checks are necessary here, but keeping them all is the safe
14781 else if (MEM_P (rtl)
14782 && XEXP (rtl, 0) != const0_rtx
14783 && ! CONSTANT_P (XEXP (rtl, 0))
14784 /* Not passed in memory. */
14785 && !MEM_P (DECL_INCOMING_RTL (decl))
14786 /* Not passed by invisible reference. */
14787 && (!REG_P (XEXP (rtl, 0))
14788 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
14789 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
14790 #if !HARD_FRAME_POINTER_IS_ARG_POINTER
14791 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
14794 /* Big endian correction check. */
14795 && BYTES_BIG_ENDIAN
14796 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
14797 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
14800 int offset = (UNITS_PER_WORD
14801 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
14803 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
14804 plus_constant (XEXP (rtl, 0), offset));
14807 else if (TREE_CODE (decl) == VAR_DECL
14810 && GET_MODE (rtl) != TYPE_MODE (TREE_TYPE (decl))
14811 && BYTES_BIG_ENDIAN)
14813 int rsize = GET_MODE_SIZE (GET_MODE (rtl));
14814 int dsize = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)));
14816 /* If a variable is declared "register" yet is smaller than
14817 a register, then if we store the variable to memory, it
14818 looks like we're storing a register-sized value, when in
14819 fact we are not. We need to adjust the offset of the
14820 storage location to reflect the actual value's bytes,
14821 else gdb will not be able to display it. */
14823 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
14824 plus_constant (XEXP (rtl, 0), rsize-dsize));
14827 /* A variable with no DECL_RTL but a DECL_INITIAL is a compile-time constant,
14828 and will have been substituted directly into all expressions that use it.
14829 C does not have such a concept, but C++ and other languages do. */
14830 if (!rtl && TREE_CODE (decl) == VAR_DECL && DECL_INITIAL (decl))
14831 rtl = rtl_for_decl_init (DECL_INITIAL (decl), TREE_TYPE (decl));
14834 rtl = targetm.delegitimize_address (rtl);
14836 /* If we don't look past the constant pool, we risk emitting a
14837 reference to a constant pool entry that isn't referenced from
14838 code, and thus is not emitted. */
14840 rtl = avoid_constant_pool_reference (rtl);
14842 /* Try harder to get a rtl. If this symbol ends up not being emitted
14843 in the current CU, resolve_addr will remove the expression referencing
14845 if (rtl == NULL_RTX
14846 && TREE_CODE (decl) == VAR_DECL
14847 && !DECL_EXTERNAL (decl)
14848 && TREE_STATIC (decl)
14849 && DECL_NAME (decl)
14850 && !DECL_HARD_REGISTER (decl)
14851 && DECL_MODE (decl) != VOIDmode)
14853 rtl = make_decl_rtl_for_debug (decl);
14855 || GET_CODE (XEXP (rtl, 0)) != SYMBOL_REF
14856 || SYMBOL_REF_DECL (XEXP (rtl, 0)) != decl)
14863 /* Check whether decl is a Fortran COMMON symbol. If not, NULL_TREE is
14864 returned. If so, the decl for the COMMON block is returned, and the
14865 value is the offset into the common block for the symbol. */
14868 fortran_common (tree decl, HOST_WIDE_INT *value)
14870 tree val_expr, cvar;
14871 enum machine_mode mode;
14872 HOST_WIDE_INT bitsize, bitpos;
14874 int volatilep = 0, unsignedp = 0;
14876 /* If the decl isn't a VAR_DECL, or if it isn't static, or if
14877 it does not have a value (the offset into the common area), or if it
14878 is thread local (as opposed to global) then it isn't common, and shouldn't
14879 be handled as such. */
14880 if (TREE_CODE (decl) != VAR_DECL
14881 || !TREE_STATIC (decl)
14882 || !DECL_HAS_VALUE_EXPR_P (decl)
14886 val_expr = DECL_VALUE_EXPR (decl);
14887 if (TREE_CODE (val_expr) != COMPONENT_REF)
14890 cvar = get_inner_reference (val_expr, &bitsize, &bitpos, &offset,
14891 &mode, &unsignedp, &volatilep, true);
14893 if (cvar == NULL_TREE
14894 || TREE_CODE (cvar) != VAR_DECL
14895 || DECL_ARTIFICIAL (cvar)
14896 || !TREE_PUBLIC (cvar))
14900 if (offset != NULL)
14902 if (!host_integerp (offset, 0))
14904 *value = tree_low_cst (offset, 0);
14907 *value += bitpos / BITS_PER_UNIT;
14912 /* Generate *either* a DW_AT_location attribute or else a DW_AT_const_value
14913 data attribute for a variable or a parameter. We generate the
14914 DW_AT_const_value attribute only in those cases where the given variable
14915 or parameter does not have a true "location" either in memory or in a
14916 register. This can happen (for example) when a constant is passed as an
14917 actual argument in a call to an inline function. (It's possible that
14918 these things can crop up in other ways also.) Note that one type of
14919 constant value which can be passed into an inlined function is a constant
14920 pointer. This can happen for example if an actual argument in an inlined
14921 function call evaluates to a compile-time constant address.
14923 CACHE_P is true if it is worth caching the location list for DECL,
14924 so that future calls can reuse it rather than regenerate it from scratch.
14925 This is true for BLOCK_NONLOCALIZED_VARS in inlined subroutines,
14926 since we will need to refer to them each time the function is inlined. */
14929 add_location_or_const_value_attribute (dw_die_ref die, tree decl, bool cache_p,
14930 enum dwarf_attribute attr)
14933 dw_loc_list_ref list;
14934 var_loc_list *loc_list;
14935 cached_dw_loc_list *cache;
14938 if (TREE_CODE (decl) == ERROR_MARK)
14941 gcc_assert (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL
14942 || TREE_CODE (decl) == RESULT_DECL);
14944 /* Try to get some constant RTL for this decl, and use that as the value of
14947 rtl = rtl_for_decl_location (decl);
14948 if (rtl && (CONSTANT_P (rtl) || GET_CODE (rtl) == CONST_STRING)
14949 && add_const_value_attribute (die, rtl))
14952 /* See if we have single element location list that is equivalent to
14953 a constant value. That way we are better to use add_const_value_attribute
14954 rather than expanding constant value equivalent. */
14955 loc_list = lookup_decl_loc (decl);
14958 && loc_list->first->next == NULL
14959 && NOTE_P (loc_list->first->loc)
14960 && NOTE_VAR_LOCATION (loc_list->first->loc)
14961 && NOTE_VAR_LOCATION_LOC (loc_list->first->loc))
14963 struct var_loc_node *node;
14965 node = loc_list->first;
14966 rtl = NOTE_VAR_LOCATION_LOC (node->loc);
14967 if (GET_CODE (rtl) == EXPR_LIST)
14968 rtl = XEXP (rtl, 0);
14969 if ((CONSTANT_P (rtl) || GET_CODE (rtl) == CONST_STRING)
14970 && add_const_value_attribute (die, rtl))
14973 /* If this decl is from BLOCK_NONLOCALIZED_VARS, we might need its
14974 list several times. See if we've already cached the contents. */
14976 if (loc_list == NULL || cached_dw_loc_list_table == NULL)
14980 cache = (cached_dw_loc_list *)
14981 htab_find_with_hash (cached_dw_loc_list_table, decl, DECL_UID (decl));
14983 list = cache->loc_list;
14987 list = loc_list_from_tree (decl, decl_by_reference_p (decl) ? 0 : 2);
14988 /* It is usually worth caching this result if the decl is from
14989 BLOCK_NONLOCALIZED_VARS and if the list has at least two elements. */
14990 if (cache_p && list && list->dw_loc_next)
14992 slot = htab_find_slot_with_hash (cached_dw_loc_list_table, decl,
14993 DECL_UID (decl), INSERT);
14994 cache = ggc_alloc_cleared_cached_dw_loc_list ();
14995 cache->decl_id = DECL_UID (decl);
14996 cache->loc_list = list;
15002 add_AT_location_description (die, attr, list);
15005 /* None of that worked, so it must not really have a location;
15006 try adding a constant value attribute from the DECL_INITIAL. */
15007 return tree_add_const_value_attribute_for_decl (die, decl);
15010 /* Add VARIABLE and DIE into deferred locations list. */
15013 defer_location (tree variable, dw_die_ref die)
15015 deferred_locations entry;
15016 entry.variable = variable;
15018 VEC_safe_push (deferred_locations, gc, deferred_locations_list, &entry);
15021 /* Helper function for tree_add_const_value_attribute. Natively encode
15022 initializer INIT into an array. Return true if successful. */
15025 native_encode_initializer (tree init, unsigned char *array, int size)
15029 if (init == NULL_TREE)
15033 switch (TREE_CODE (init))
15036 type = TREE_TYPE (init);
15037 if (TREE_CODE (type) == ARRAY_TYPE)
15039 tree enttype = TREE_TYPE (type);
15040 enum machine_mode mode = TYPE_MODE (enttype);
15042 if (GET_MODE_CLASS (mode) != MODE_INT || GET_MODE_SIZE (mode) != 1)
15044 if (int_size_in_bytes (type) != size)
15046 if (size > TREE_STRING_LENGTH (init))
15048 memcpy (array, TREE_STRING_POINTER (init),
15049 TREE_STRING_LENGTH (init));
15050 memset (array + TREE_STRING_LENGTH (init),
15051 '\0', size - TREE_STRING_LENGTH (init));
15054 memcpy (array, TREE_STRING_POINTER (init), size);
15059 type = TREE_TYPE (init);
15060 if (int_size_in_bytes (type) != size)
15062 if (TREE_CODE (type) == ARRAY_TYPE)
15064 HOST_WIDE_INT min_index;
15065 unsigned HOST_WIDE_INT cnt;
15066 int curpos = 0, fieldsize;
15067 constructor_elt *ce;
15069 if (TYPE_DOMAIN (type) == NULL_TREE
15070 || !host_integerp (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), 0))
15073 fieldsize = int_size_in_bytes (TREE_TYPE (type));
15074 if (fieldsize <= 0)
15077 min_index = tree_low_cst (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), 0);
15078 memset (array, '\0', size);
15079 FOR_EACH_VEC_ELT (constructor_elt, CONSTRUCTOR_ELTS (init), cnt, ce)
15081 tree val = ce->value;
15082 tree index = ce->index;
15084 if (index && TREE_CODE (index) == RANGE_EXPR)
15085 pos = (tree_low_cst (TREE_OPERAND (index, 0), 0) - min_index)
15088 pos = (tree_low_cst (index, 0) - min_index) * fieldsize;
15093 if (!native_encode_initializer (val, array + pos, fieldsize))
15096 curpos = pos + fieldsize;
15097 if (index && TREE_CODE (index) == RANGE_EXPR)
15099 int count = tree_low_cst (TREE_OPERAND (index, 1), 0)
15100 - tree_low_cst (TREE_OPERAND (index, 0), 0);
15101 while (count-- > 0)
15104 memcpy (array + curpos, array + pos, fieldsize);
15105 curpos += fieldsize;
15108 gcc_assert (curpos <= size);
15112 else if (TREE_CODE (type) == RECORD_TYPE
15113 || TREE_CODE (type) == UNION_TYPE)
15115 tree field = NULL_TREE;
15116 unsigned HOST_WIDE_INT cnt;
15117 constructor_elt *ce;
15119 if (int_size_in_bytes (type) != size)
15122 if (TREE_CODE (type) == RECORD_TYPE)
15123 field = TYPE_FIELDS (type);
15125 FOR_EACH_VEC_ELT (constructor_elt, CONSTRUCTOR_ELTS (init), cnt, ce)
15127 tree val = ce->value;
15128 int pos, fieldsize;
15130 if (ce->index != 0)
15136 if (field == NULL_TREE || DECL_BIT_FIELD (field))
15139 if (TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE
15140 && TYPE_DOMAIN (TREE_TYPE (field))
15141 && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (field))))
15143 else if (DECL_SIZE_UNIT (field) == NULL_TREE
15144 || !host_integerp (DECL_SIZE_UNIT (field), 0))
15146 fieldsize = tree_low_cst (DECL_SIZE_UNIT (field), 0);
15147 pos = int_byte_position (field);
15148 gcc_assert (pos + fieldsize <= size);
15150 && !native_encode_initializer (val, array + pos, fieldsize))
15156 case VIEW_CONVERT_EXPR:
15157 case NON_LVALUE_EXPR:
15158 return native_encode_initializer (TREE_OPERAND (init, 0), array, size);
15160 return native_encode_expr (init, array, size) == size;
15164 /* Attach a DW_AT_const_value attribute to DIE. The value of the
15165 attribute is the const value T. */
15168 tree_add_const_value_attribute (dw_die_ref die, tree t)
15171 tree type = TREE_TYPE (t);
15174 if (!t || !TREE_TYPE (t) || TREE_TYPE (t) == error_mark_node)
15178 gcc_assert (!DECL_P (init));
15180 rtl = rtl_for_decl_init (init, type);
15182 return add_const_value_attribute (die, rtl);
15183 /* If the host and target are sane, try harder. */
15184 else if (CHAR_BIT == 8 && BITS_PER_UNIT == 8
15185 && initializer_constant_valid_p (init, type))
15187 HOST_WIDE_INT size = int_size_in_bytes (TREE_TYPE (init));
15188 if (size > 0 && (int) size == size)
15190 unsigned char *array = (unsigned char *)
15191 ggc_alloc_cleared_atomic (size);
15193 if (native_encode_initializer (init, array, size))
15195 add_AT_vec (die, DW_AT_const_value, size, 1, array);
15203 /* Attach a DW_AT_const_value attribute to VAR_DIE. The value of the
15204 attribute is the const value of T, where T is an integral constant
15205 variable with static storage duration
15206 (so it can't be a PARM_DECL or a RESULT_DECL). */
15209 tree_add_const_value_attribute_for_decl (dw_die_ref var_die, tree decl)
15213 || (TREE_CODE (decl) != VAR_DECL
15214 && TREE_CODE (decl) != CONST_DECL)
15215 || (TREE_CODE (decl) == VAR_DECL
15216 && !TREE_STATIC (decl)))
15219 if (TREE_READONLY (decl)
15220 && ! TREE_THIS_VOLATILE (decl)
15221 && DECL_INITIAL (decl))
15226 /* Don't add DW_AT_const_value if abstract origin already has one. */
15227 if (get_AT (var_die, DW_AT_const_value))
15230 return tree_add_const_value_attribute (var_die, DECL_INITIAL (decl));
15233 /* Convert the CFI instructions for the current function into a
15234 location list. This is used for DW_AT_frame_base when we targeting
15235 a dwarf2 consumer that does not support the dwarf3
15236 DW_OP_call_frame_cfa. OFFSET is a constant to be added to all CFA
15239 static dw_loc_list_ref
15240 convert_cfa_to_fb_loc_list (HOST_WIDE_INT offset)
15244 dw_loc_list_ref list, *list_tail;
15246 dw_cfa_location last_cfa, next_cfa;
15247 const char *start_label, *last_label, *section;
15248 dw_cfa_location remember;
15251 gcc_assert (fde != NULL);
15253 section = secname_for_decl (current_function_decl);
15257 memset (&next_cfa, 0, sizeof (next_cfa));
15258 next_cfa.reg = INVALID_REGNUM;
15259 remember = next_cfa;
15261 start_label = fde->dw_fde_begin;
15263 /* ??? Bald assumption that the CIE opcode list does not contain
15264 advance opcodes. */
15265 FOR_EACH_VEC_ELT (dw_cfi_ref, cie_cfi_vec, ix, cfi)
15266 lookup_cfa_1 (cfi, &next_cfa, &remember);
15268 last_cfa = next_cfa;
15269 last_label = start_label;
15271 if (fde->dw_fde_second_begin && fde->dw_fde_switch_cfi_index == 0)
15273 /* If the first partition contained no CFI adjustments, the
15274 CIE opcodes apply to the whole first partition. */
15275 *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset),
15276 fde->dw_fde_begin, fde->dw_fde_end, section);
15277 list_tail =&(*list_tail)->dw_loc_next;
15278 start_label = last_label = fde->dw_fde_second_begin;
15281 FOR_EACH_VEC_ELT (dw_cfi_ref, fde->dw_fde_cfi, ix, cfi)
15283 switch (cfi->dw_cfi_opc)
15285 case DW_CFA_set_loc:
15286 case DW_CFA_advance_loc1:
15287 case DW_CFA_advance_loc2:
15288 case DW_CFA_advance_loc4:
15289 if (!cfa_equal_p (&last_cfa, &next_cfa))
15291 *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset),
15292 start_label, last_label, section);
15294 list_tail = &(*list_tail)->dw_loc_next;
15295 last_cfa = next_cfa;
15296 start_label = last_label;
15298 last_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
15301 case DW_CFA_advance_loc:
15302 /* The encoding is complex enough that we should never emit this. */
15303 gcc_unreachable ();
15306 lookup_cfa_1 (cfi, &next_cfa, &remember);
15309 if (ix + 1 == fde->dw_fde_switch_cfi_index)
15311 if (!cfa_equal_p (&last_cfa, &next_cfa))
15313 *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset),
15314 start_label, last_label, section);
15316 list_tail = &(*list_tail)->dw_loc_next;
15317 last_cfa = next_cfa;
15318 start_label = last_label;
15320 *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset),
15321 start_label, fde->dw_fde_end, section);
15322 list_tail = &(*list_tail)->dw_loc_next;
15323 start_label = last_label = fde->dw_fde_second_begin;
15327 if (!cfa_equal_p (&last_cfa, &next_cfa))
15329 *list_tail = new_loc_list (build_cfa_loc (&last_cfa, offset),
15330 start_label, last_label, section);
15331 list_tail = &(*list_tail)->dw_loc_next;
15332 start_label = last_label;
15335 *list_tail = new_loc_list (build_cfa_loc (&next_cfa, offset),
15337 fde->dw_fde_second_begin
15338 ? fde->dw_fde_second_end : fde->dw_fde_end,
15341 if (list && list->dw_loc_next)
15347 /* Compute a displacement from the "steady-state frame pointer" to the
15348 frame base (often the same as the CFA), and store it in
15349 frame_pointer_fb_offset. OFFSET is added to the displacement
15350 before the latter is negated. */
15353 compute_frame_pointer_to_fb_displacement (HOST_WIDE_INT offset)
15357 #ifdef FRAME_POINTER_CFA_OFFSET
15358 reg = frame_pointer_rtx;
15359 offset += FRAME_POINTER_CFA_OFFSET (current_function_decl);
15361 reg = arg_pointer_rtx;
15362 offset += ARG_POINTER_CFA_OFFSET (current_function_decl);
15365 elim = eliminate_regs (reg, VOIDmode, NULL_RTX);
15366 if (GET_CODE (elim) == PLUS)
15368 offset += INTVAL (XEXP (elim, 1));
15369 elim = XEXP (elim, 0);
15372 frame_pointer_fb_offset = -offset;
15374 /* ??? AVR doesn't set up valid eliminations when there is no stack frame
15375 in which to eliminate. This is because it's stack pointer isn't
15376 directly accessible as a register within the ISA. To work around
15377 this, assume that while we cannot provide a proper value for
15378 frame_pointer_fb_offset, we won't need one either. */
15379 frame_pointer_fb_offset_valid
15380 = ((SUPPORTS_STACK_ALIGNMENT
15381 && (elim == hard_frame_pointer_rtx
15382 || elim == stack_pointer_rtx))
15383 || elim == (frame_pointer_needed
15384 ? hard_frame_pointer_rtx
15385 : stack_pointer_rtx));
15388 /* Generate a DW_AT_name attribute given some string value to be included as
15389 the value of the attribute. */
15392 add_name_attribute (dw_die_ref die, const char *name_string)
15394 if (name_string != NULL && *name_string != 0)
15396 if (demangle_name_func)
15397 name_string = (*demangle_name_func) (name_string);
15399 add_AT_string (die, DW_AT_name, name_string);
15403 /* Retrieve the descriptive type of TYPE, if any, make sure it has a
15404 DIE and attach a DW_AT_GNAT_descriptive_type attribute to the DIE
15405 of TYPE accordingly.
15407 ??? This is a temporary measure until after we're able to generate
15408 regular DWARF for the complex Ada type system. */
15411 add_gnat_descriptive_type_attribute (dw_die_ref die, tree type,
15412 dw_die_ref context_die)
15415 dw_die_ref dtype_die;
15417 if (!lang_hooks.types.descriptive_type)
15420 dtype = lang_hooks.types.descriptive_type (type);
15424 dtype_die = lookup_type_die (dtype);
15427 /* The descriptive type indirectly references TYPE if this is also the
15428 case for TYPE itself. Do not deal with the circularity here. */
15429 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) = 1;
15430 gen_type_die (dtype, context_die);
15431 TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type)) = 0;
15432 dtype_die = lookup_type_die (dtype);
15433 gcc_assert (dtype_die);
15436 add_AT_die_ref (die, DW_AT_GNAT_descriptive_type, dtype_die);
15439 /* Generate a DW_AT_comp_dir attribute for DIE. */
15442 add_comp_dir_attribute (dw_die_ref die)
15444 const char *wd = get_src_pwd ();
15450 if (DWARF2_DIR_SHOULD_END_WITH_SEPARATOR)
15454 wdlen = strlen (wd);
15455 wd1 = (char *) ggc_alloc_atomic (wdlen + 2);
15457 wd1 [wdlen] = DIR_SEPARATOR;
15458 wd1 [wdlen + 1] = 0;
15462 add_AT_string (die, DW_AT_comp_dir, remap_debug_filename (wd));
15465 /* Return the default for DW_AT_lower_bound, or -1 if there is not any
15469 lower_bound_default (void)
15471 switch (get_AT_unsigned (comp_unit_die (), DW_AT_language))
15476 case DW_LANG_C_plus_plus:
15478 case DW_LANG_ObjC_plus_plus:
15481 case DW_LANG_Fortran77:
15482 case DW_LANG_Fortran90:
15483 case DW_LANG_Fortran95:
15487 case DW_LANG_Python:
15488 return dwarf_version >= 4 ? 0 : -1;
15489 case DW_LANG_Ada95:
15490 case DW_LANG_Ada83:
15491 case DW_LANG_Cobol74:
15492 case DW_LANG_Cobol85:
15493 case DW_LANG_Pascal83:
15494 case DW_LANG_Modula2:
15496 return dwarf_version >= 4 ? 1 : -1;
15502 /* Given a tree node describing an array bound (either lower or upper) output
15503 a representation for that bound. */
15506 add_bound_info (dw_die_ref subrange_die, enum dwarf_attribute bound_attr, tree bound)
15508 switch (TREE_CODE (bound))
15513 /* All fixed-bounds are represented by INTEGER_CST nodes. */
15516 unsigned int prec = simple_type_size_in_bits (TREE_TYPE (bound));
15519 /* Use the default if possible. */
15520 if (bound_attr == DW_AT_lower_bound
15521 && host_integerp (bound, 0)
15522 && (dflt = lower_bound_default ()) != -1
15523 && tree_low_cst (bound, 0) == dflt)
15526 /* Otherwise represent the bound as an unsigned value with the
15527 precision of its type. The precision and signedness of the
15528 type will be necessary to re-interpret it unambiguously. */
15529 else if (prec < HOST_BITS_PER_WIDE_INT)
15531 unsigned HOST_WIDE_INT mask
15532 = ((unsigned HOST_WIDE_INT) 1 << prec) - 1;
15533 add_AT_unsigned (subrange_die, bound_attr,
15534 TREE_INT_CST_LOW (bound) & mask);
15536 else if (prec == HOST_BITS_PER_WIDE_INT
15537 || TREE_INT_CST_HIGH (bound) == 0)
15538 add_AT_unsigned (subrange_die, bound_attr,
15539 TREE_INT_CST_LOW (bound));
15541 add_AT_double (subrange_die, bound_attr, TREE_INT_CST_HIGH (bound),
15542 TREE_INT_CST_LOW (bound));
15547 case VIEW_CONVERT_EXPR:
15548 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
15558 dw_die_ref decl_die = lookup_decl_die (bound);
15560 /* ??? Can this happen, or should the variable have been bound
15561 first? Probably it can, since I imagine that we try to create
15562 the types of parameters in the order in which they exist in
15563 the list, and won't have created a forward reference to a
15564 later parameter. */
15565 if (decl_die != NULL)
15567 add_AT_die_ref (subrange_die, bound_attr, decl_die);
15575 /* Otherwise try to create a stack operation procedure to
15576 evaluate the value of the array bound. */
15578 dw_die_ref ctx, decl_die;
15579 dw_loc_list_ref list;
15581 list = loc_list_from_tree (bound, 2);
15582 if (list == NULL || single_element_loc_list_p (list))
15584 /* If DW_AT_*bound is not a reference nor constant, it is
15585 a DWARF expression rather than location description.
15586 For that loc_list_from_tree (bound, 0) is needed.
15587 If that fails to give a single element list,
15588 fall back to outputting this as a reference anyway. */
15589 dw_loc_list_ref list2 = loc_list_from_tree (bound, 0);
15590 if (list2 && single_element_loc_list_p (list2))
15592 add_AT_loc (subrange_die, bound_attr, list2->expr);
15599 if (current_function_decl == 0)
15600 ctx = comp_unit_die ();
15602 ctx = lookup_decl_die (current_function_decl);
15604 decl_die = new_die (DW_TAG_variable, ctx, bound);
15605 add_AT_flag (decl_die, DW_AT_artificial, 1);
15606 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
15607 add_AT_location_description (decl_die, DW_AT_location, list);
15608 add_AT_die_ref (subrange_die, bound_attr, decl_die);
15614 /* Add subscript info to TYPE_DIE, describing an array TYPE, collapsing
15615 possibly nested array subscripts in a flat sequence if COLLAPSE_P is true.
15616 Note that the block of subscript information for an array type also
15617 includes information about the element type of the given array type. */
15620 add_subscript_info (dw_die_ref type_die, tree type, bool collapse_p)
15622 unsigned dimension_number;
15624 dw_die_ref subrange_die;
15626 for (dimension_number = 0;
15627 TREE_CODE (type) == ARRAY_TYPE && (dimension_number == 0 || collapse_p);
15628 type = TREE_TYPE (type), dimension_number++)
15630 tree domain = TYPE_DOMAIN (type);
15632 if (TYPE_STRING_FLAG (type) && is_fortran () && dimension_number > 0)
15635 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
15636 and (in GNU C only) variable bounds. Handle all three forms
15638 subrange_die = new_die (DW_TAG_subrange_type, type_die, NULL);
15641 /* We have an array type with specified bounds. */
15642 lower = TYPE_MIN_VALUE (domain);
15643 upper = TYPE_MAX_VALUE (domain);
15645 /* Define the index type. */
15646 if (TREE_TYPE (domain))
15648 /* ??? This is probably an Ada unnamed subrange type. Ignore the
15649 TREE_TYPE field. We can't emit debug info for this
15650 because it is an unnamed integral type. */
15651 if (TREE_CODE (domain) == INTEGER_TYPE
15652 && TYPE_NAME (domain) == NULL_TREE
15653 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
15654 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
15657 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
15661 /* ??? If upper is NULL, the array has unspecified length,
15662 but it does have a lower bound. This happens with Fortran
15664 Since the debugger is definitely going to need to know N
15665 to produce useful results, go ahead and output the lower
15666 bound solo, and hope the debugger can cope. */
15668 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
15670 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
15673 /* Otherwise we have an array type with an unspecified length. The
15674 DWARF-2 spec does not say how to handle this; let's just leave out the
15680 add_byte_size_attribute (dw_die_ref die, tree tree_node)
15684 switch (TREE_CODE (tree_node))
15689 case ENUMERAL_TYPE:
15692 case QUAL_UNION_TYPE:
15693 size = int_size_in_bytes (tree_node);
15696 /* For a data member of a struct or union, the DW_AT_byte_size is
15697 generally given as the number of bytes normally allocated for an
15698 object of the *declared* type of the member itself. This is true
15699 even for bit-fields. */
15700 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
15703 gcc_unreachable ();
15706 /* Note that `size' might be -1 when we get to this point. If it is, that
15707 indicates that the byte size of the entity in question is variable. We
15708 have no good way of expressing this fact in Dwarf at the present time,
15709 so just let the -1 pass on through. */
15710 add_AT_unsigned (die, DW_AT_byte_size, size);
15713 /* For a FIELD_DECL node which represents a bit-field, output an attribute
15714 which specifies the distance in bits from the highest order bit of the
15715 "containing object" for the bit-field to the highest order bit of the
15718 For any given bit-field, the "containing object" is a hypothetical object
15719 (of some integral or enum type) within which the given bit-field lives. The
15720 type of this hypothetical "containing object" is always the same as the
15721 declared type of the individual bit-field itself. The determination of the
15722 exact location of the "containing object" for a bit-field is rather
15723 complicated. It's handled by the `field_byte_offset' function (above).
15725 Note that it is the size (in bytes) of the hypothetical "containing object"
15726 which will be given in the DW_AT_byte_size attribute for this bit-field.
15727 (See `byte_size_attribute' above). */
15730 add_bit_offset_attribute (dw_die_ref die, tree decl)
15732 HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl);
15733 tree type = DECL_BIT_FIELD_TYPE (decl);
15734 HOST_WIDE_INT bitpos_int;
15735 HOST_WIDE_INT highest_order_object_bit_offset;
15736 HOST_WIDE_INT highest_order_field_bit_offset;
15737 HOST_WIDE_INT bit_offset;
15739 /* Must be a field and a bit field. */
15740 gcc_assert (type && TREE_CODE (decl) == FIELD_DECL);
15742 /* We can't yet handle bit-fields whose offsets are variable, so if we
15743 encounter such things, just return without generating any attribute
15744 whatsoever. Likewise for variable or too large size. */
15745 if (! host_integerp (bit_position (decl), 0)
15746 || ! host_integerp (DECL_SIZE (decl), 1))
15749 bitpos_int = int_bit_position (decl);
15751 /* Note that the bit offset is always the distance (in bits) from the
15752 highest-order bit of the "containing object" to the highest-order bit of
15753 the bit-field itself. Since the "high-order end" of any object or field
15754 is different on big-endian and little-endian machines, the computation
15755 below must take account of these differences. */
15756 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
15757 highest_order_field_bit_offset = bitpos_int;
15759 if (! BYTES_BIG_ENDIAN)
15761 highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0);
15762 highest_order_object_bit_offset += simple_type_size_in_bits (type);
15766 = (! BYTES_BIG_ENDIAN
15767 ? highest_order_object_bit_offset - highest_order_field_bit_offset
15768 : highest_order_field_bit_offset - highest_order_object_bit_offset);
15770 if (bit_offset < 0)
15771 add_AT_int (die, DW_AT_bit_offset, bit_offset);
15773 add_AT_unsigned (die, DW_AT_bit_offset, (unsigned HOST_WIDE_INT) bit_offset);
15776 /* For a FIELD_DECL node which represents a bit field, output an attribute
15777 which specifies the length in bits of the given field. */
15780 add_bit_size_attribute (dw_die_ref die, tree decl)
15782 /* Must be a field and a bit field. */
15783 gcc_assert (TREE_CODE (decl) == FIELD_DECL
15784 && DECL_BIT_FIELD_TYPE (decl));
15786 if (host_integerp (DECL_SIZE (decl), 1))
15787 add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1));
15790 /* If the compiled language is ANSI C, then add a 'prototyped'
15791 attribute, if arg types are given for the parameters of a function. */
15794 add_prototyped_attribute (dw_die_ref die, tree func_type)
15796 if (get_AT_unsigned (comp_unit_die (), DW_AT_language) == DW_LANG_C89
15797 && prototype_p (func_type))
15798 add_AT_flag (die, DW_AT_prototyped, 1);
15801 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
15802 by looking in either the type declaration or object declaration
15805 static inline dw_die_ref
15806 add_abstract_origin_attribute (dw_die_ref die, tree origin)
15808 dw_die_ref origin_die = NULL;
15810 if (TREE_CODE (origin) != FUNCTION_DECL)
15812 /* We may have gotten separated from the block for the inlined
15813 function, if we're in an exception handler or some such; make
15814 sure that the abstract function has been written out.
15816 Doing this for nested functions is wrong, however; functions are
15817 distinct units, and our context might not even be inline. */
15821 fn = TYPE_STUB_DECL (fn);
15823 fn = decl_function_context (fn);
15825 dwarf2out_abstract_function (fn);
15828 if (DECL_P (origin))
15829 origin_die = lookup_decl_die (origin);
15830 else if (TYPE_P (origin))
15831 origin_die = lookup_type_die (origin);
15833 /* XXX: Functions that are never lowered don't always have correct block
15834 trees (in the case of java, they simply have no block tree, in some other
15835 languages). For these functions, there is nothing we can really do to
15836 output correct debug info for inlined functions in all cases. Rather
15837 than die, we'll just produce deficient debug info now, in that we will
15838 have variables without a proper abstract origin. In the future, when all
15839 functions are lowered, we should re-add a gcc_assert (origin_die)
15843 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
15847 /* We do not currently support the pure_virtual attribute. */
15850 add_pure_or_virtual_attribute (dw_die_ref die, tree func_decl)
15852 if (DECL_VINDEX (func_decl))
15854 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
15856 if (host_integerp (DECL_VINDEX (func_decl), 0))
15857 add_AT_loc (die, DW_AT_vtable_elem_location,
15858 new_loc_descr (DW_OP_constu,
15859 tree_low_cst (DECL_VINDEX (func_decl), 0),
15862 /* GNU extension: Record what type this method came from originally. */
15863 if (debug_info_level > DINFO_LEVEL_TERSE
15864 && DECL_CONTEXT (func_decl))
15865 add_AT_die_ref (die, DW_AT_containing_type,
15866 lookup_type_die (DECL_CONTEXT (func_decl)));
15870 /* Add a DW_AT_linkage_name or DW_AT_MIPS_linkage_name attribute for the
15871 given decl. This used to be a vendor extension until after DWARF 4
15872 standardized it. */
15875 add_linkage_attr (dw_die_ref die, tree decl)
15877 const char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
15879 /* Mimic what assemble_name_raw does with a leading '*'. */
15880 if (name[0] == '*')
15883 if (dwarf_version >= 4)
15884 add_AT_string (die, DW_AT_linkage_name, name);
15886 add_AT_string (die, DW_AT_MIPS_linkage_name, name);
15889 /* Add source coordinate attributes for the given decl. */
15892 add_src_coords_attributes (dw_die_ref die, tree decl)
15894 expanded_location s;
15896 if (DECL_SOURCE_LOCATION (decl) == UNKNOWN_LOCATION)
15898 s = expand_location (DECL_SOURCE_LOCATION (decl));
15899 add_AT_file (die, DW_AT_decl_file, lookup_filename (s.file));
15900 add_AT_unsigned (die, DW_AT_decl_line, s.line);
15903 /* Add DW_AT_{,MIPS_}linkage_name attribute for the given decl. */
15906 add_linkage_name (dw_die_ref die, tree decl)
15908 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
15909 && TREE_PUBLIC (decl)
15910 && !DECL_ABSTRACT (decl)
15911 && !(TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
15912 && die->die_tag != DW_TAG_member)
15914 /* Defer until we have an assembler name set. */
15915 if (!DECL_ASSEMBLER_NAME_SET_P (decl))
15917 limbo_die_node *asm_name;
15919 asm_name = ggc_alloc_cleared_limbo_die_node ();
15920 asm_name->die = die;
15921 asm_name->created_for = decl;
15922 asm_name->next = deferred_asm_name;
15923 deferred_asm_name = asm_name;
15925 else if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
15926 add_linkage_attr (die, decl);
15930 /* Add a DW_AT_name attribute and source coordinate attribute for the
15931 given decl, but only if it actually has a name. */
15934 add_name_and_src_coords_attributes (dw_die_ref die, tree decl)
15938 decl_name = DECL_NAME (decl);
15939 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
15941 const char *name = dwarf2_name (decl, 0);
15943 add_name_attribute (die, name);
15944 if (! DECL_ARTIFICIAL (decl))
15945 add_src_coords_attributes (die, decl);
15947 add_linkage_name (die, decl);
15950 #ifdef VMS_DEBUGGING_INFO
15951 /* Get the function's name, as described by its RTL. This may be different
15952 from the DECL_NAME name used in the source file. */
15953 if (TREE_CODE (decl) == FUNCTION_DECL && TREE_ASM_WRITTEN (decl))
15955 add_AT_addr (die, DW_AT_VMS_rtnbeg_pd_address,
15956 XEXP (DECL_RTL (decl), 0));
15957 VEC_safe_push (rtx, gc, used_rtx_array, XEXP (DECL_RTL (decl), 0));
15959 #endif /* VMS_DEBUGGING_INFO */
15962 #ifdef VMS_DEBUGGING_INFO
15963 /* Output the debug main pointer die for VMS */
15966 dwarf2out_vms_debug_main_pointer (void)
15968 char label[MAX_ARTIFICIAL_LABEL_BYTES];
15971 /* Allocate the VMS debug main subprogram die. */
15972 die = ggc_alloc_cleared_die_node ();
15973 die->die_tag = DW_TAG_subprogram;
15974 add_name_attribute (die, VMS_DEBUG_MAIN_POINTER);
15975 ASM_GENERATE_INTERNAL_LABEL (label, PROLOGUE_END_LABEL,
15976 current_function_funcdef_no);
15977 add_AT_lbl_id (die, DW_AT_entry_pc, label);
15979 /* Make it the first child of comp_unit_die (). */
15980 die->die_parent = comp_unit_die ();
15981 if (comp_unit_die ()->die_child)
15983 die->die_sib = comp_unit_die ()->die_child->die_sib;
15984 comp_unit_die ()->die_child->die_sib = die;
15988 die->die_sib = die;
15989 comp_unit_die ()->die_child = die;
15992 #endif /* VMS_DEBUGGING_INFO */
15994 /* Push a new declaration scope. */
15997 push_decl_scope (tree scope)
15999 VEC_safe_push (tree, gc, decl_scope_table, scope);
16002 /* Pop a declaration scope. */
16005 pop_decl_scope (void)
16007 VEC_pop (tree, decl_scope_table);
16010 /* Return the DIE for the scope that immediately contains this type.
16011 Non-named types get global scope. Named types nested in other
16012 types get their containing scope if it's open, or global scope
16013 otherwise. All other types (i.e. function-local named types) get
16014 the current active scope. */
16017 scope_die_for (tree t, dw_die_ref context_die)
16019 dw_die_ref scope_die = NULL;
16020 tree containing_scope;
16023 /* Non-types always go in the current scope. */
16024 gcc_assert (TYPE_P (t));
16026 containing_scope = TYPE_CONTEXT (t);
16028 /* Use the containing namespace if it was passed in (for a declaration). */
16029 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
16031 if (context_die == lookup_decl_die (containing_scope))
16034 containing_scope = NULL_TREE;
16037 /* Ignore function type "scopes" from the C frontend. They mean that
16038 a tagged type is local to a parmlist of a function declarator, but
16039 that isn't useful to DWARF. */
16040 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
16041 containing_scope = NULL_TREE;
16043 if (SCOPE_FILE_SCOPE_P (containing_scope))
16044 scope_die = comp_unit_die ();
16045 else if (TYPE_P (containing_scope))
16047 /* For types, we can just look up the appropriate DIE. But
16048 first we check to see if we're in the middle of emitting it
16049 so we know where the new DIE should go. */
16050 for (i = VEC_length (tree, decl_scope_table) - 1; i >= 0; --i)
16051 if (VEC_index (tree, decl_scope_table, i) == containing_scope)
16056 gcc_assert (debug_info_level <= DINFO_LEVEL_TERSE
16057 || TREE_ASM_WRITTEN (containing_scope));
16058 /*We are not in the middle of emitting the type
16059 CONTAINING_SCOPE. Let's see if it's emitted already. */
16060 scope_die = lookup_type_die (containing_scope);
16062 /* If none of the current dies are suitable, we get file scope. */
16063 if (scope_die == NULL)
16064 scope_die = comp_unit_die ();
16067 scope_die = lookup_type_die_strip_naming_typedef (containing_scope);
16070 scope_die = context_die;
16075 /* Returns nonzero if CONTEXT_DIE is internal to a function. */
16078 local_scope_p (dw_die_ref context_die)
16080 for (; context_die; context_die = context_die->die_parent)
16081 if (context_die->die_tag == DW_TAG_inlined_subroutine
16082 || context_die->die_tag == DW_TAG_subprogram)
16088 /* Returns nonzero if CONTEXT_DIE is a class. */
16091 class_scope_p (dw_die_ref context_die)
16093 return (context_die
16094 && (context_die->die_tag == DW_TAG_structure_type
16095 || context_die->die_tag == DW_TAG_class_type
16096 || context_die->die_tag == DW_TAG_interface_type
16097 || context_die->die_tag == DW_TAG_union_type));
16100 /* Returns nonzero if CONTEXT_DIE is a class or namespace, for deciding
16101 whether or not to treat a DIE in this context as a declaration. */
16104 class_or_namespace_scope_p (dw_die_ref context_die)
16106 return (class_scope_p (context_die)
16107 || (context_die && context_die->die_tag == DW_TAG_namespace));
16110 /* Many forms of DIEs require a "type description" attribute. This
16111 routine locates the proper "type descriptor" die for the type given
16112 by 'type', and adds a DW_AT_type attribute below the given die. */
16115 add_type_attribute (dw_die_ref object_die, tree type, int decl_const,
16116 int decl_volatile, dw_die_ref context_die)
16118 enum tree_code code = TREE_CODE (type);
16119 dw_die_ref type_die = NULL;
16121 /* ??? If this type is an unnamed subrange type of an integral, floating-point
16122 or fixed-point type, use the inner type. This is because we have no
16123 support for unnamed types in base_type_die. This can happen if this is
16124 an Ada subrange type. Correct solution is emit a subrange type die. */
16125 if ((code == INTEGER_TYPE || code == REAL_TYPE || code == FIXED_POINT_TYPE)
16126 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
16127 type = TREE_TYPE (type), code = TREE_CODE (type);
16129 if (code == ERROR_MARK
16130 /* Handle a special case. For functions whose return type is void, we
16131 generate *no* type attribute. (Note that no object may have type
16132 `void', so this only applies to function return types). */
16133 || code == VOID_TYPE)
16136 type_die = modified_type_die (type,
16137 decl_const || TYPE_READONLY (type),
16138 decl_volatile || TYPE_VOLATILE (type),
16141 if (type_die != NULL)
16142 add_AT_die_ref (object_die, DW_AT_type, type_die);
16145 /* Given an object die, add the calling convention attribute for the
16146 function call type. */
16148 add_calling_convention_attribute (dw_die_ref subr_die, tree decl)
16150 enum dwarf_calling_convention value = DW_CC_normal;
16152 value = ((enum dwarf_calling_convention)
16153 targetm.dwarf_calling_convention (TREE_TYPE (decl)));
16156 && !strcmp (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), "MAIN__"))
16158 /* DWARF 2 doesn't provide a way to identify a program's source-level
16159 entry point. DW_AT_calling_convention attributes are only meant
16160 to describe functions' calling conventions. However, lacking a
16161 better way to signal the Fortran main program, we used this for
16162 a long time, following existing custom. Now, DWARF 4 has
16163 DW_AT_main_subprogram, which we add below, but some tools still
16164 rely on the old way, which we thus keep. */
16165 value = DW_CC_program;
16167 if (dwarf_version >= 4 || !dwarf_strict)
16168 add_AT_flag (subr_die, DW_AT_main_subprogram, 1);
16171 /* Only add the attribute if the backend requests it, and
16172 is not DW_CC_normal. */
16173 if (value && (value != DW_CC_normal))
16174 add_AT_unsigned (subr_die, DW_AT_calling_convention, value);
16177 /* Given a tree pointer to a struct, class, union, or enum type node, return
16178 a pointer to the (string) tag name for the given type, or zero if the type
16179 was declared without a tag. */
16181 static const char *
16182 type_tag (const_tree type)
16184 const char *name = 0;
16186 if (TYPE_NAME (type) != 0)
16190 /* Find the IDENTIFIER_NODE for the type name. */
16191 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE
16192 && !TYPE_NAMELESS (type))
16193 t = TYPE_NAME (type);
16195 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
16196 a TYPE_DECL node, regardless of whether or not a `typedef' was
16198 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
16199 && ! DECL_IGNORED_P (TYPE_NAME (type)))
16201 /* We want to be extra verbose. Don't call dwarf_name if
16202 DECL_NAME isn't set. The default hook for decl_printable_name
16203 doesn't like that, and in this context it's correct to return
16204 0, instead of "<anonymous>" or the like. */
16205 if (DECL_NAME (TYPE_NAME (type))
16206 && !DECL_NAMELESS (TYPE_NAME (type)))
16207 name = lang_hooks.dwarf_name (TYPE_NAME (type), 2);
16210 /* Now get the name as a string, or invent one. */
16211 if (!name && t != 0)
16212 name = IDENTIFIER_POINTER (t);
16215 return (name == 0 || *name == '\0') ? 0 : name;
16218 /* Return the type associated with a data member, make a special check
16219 for bit field types. */
16222 member_declared_type (const_tree member)
16224 return (DECL_BIT_FIELD_TYPE (member)
16225 ? DECL_BIT_FIELD_TYPE (member) : TREE_TYPE (member));
16228 /* Get the decl's label, as described by its RTL. This may be different
16229 from the DECL_NAME name used in the source file. */
16232 static const char *
16233 decl_start_label (tree decl)
16236 const char *fnname;
16238 x = DECL_RTL (decl);
16239 gcc_assert (MEM_P (x));
16242 gcc_assert (GET_CODE (x) == SYMBOL_REF);
16244 fnname = XSTR (x, 0);
16249 /* These routines generate the internal representation of the DIE's for
16250 the compilation unit. Debugging information is collected by walking
16251 the declaration trees passed in from dwarf2out_decl(). */
16254 gen_array_type_die (tree type, dw_die_ref context_die)
16256 dw_die_ref scope_die = scope_die_for (type, context_die);
16257 dw_die_ref array_die;
16259 /* GNU compilers represent multidimensional array types as sequences of one
16260 dimensional array types whose element types are themselves array types.
16261 We sometimes squish that down to a single array_type DIE with multiple
16262 subscripts in the Dwarf debugging info. The draft Dwarf specification
16263 say that we are allowed to do this kind of compression in C, because
16264 there is no difference between an array of arrays and a multidimensional
16265 array. We don't do this for Ada to remain as close as possible to the
16266 actual representation, which is especially important against the language
16267 flexibilty wrt arrays of variable size. */
16269 bool collapse_nested_arrays = !is_ada ();
16272 /* Emit DW_TAG_string_type for Fortran character types (with kind 1 only, as
16273 DW_TAG_string_type doesn't have DW_AT_type attribute). */
16274 if (TYPE_STRING_FLAG (type)
16275 && TREE_CODE (type) == ARRAY_TYPE
16277 && TYPE_MODE (TREE_TYPE (type)) == TYPE_MODE (char_type_node))
16279 HOST_WIDE_INT size;
16281 array_die = new_die (DW_TAG_string_type, scope_die, type);
16282 add_name_attribute (array_die, type_tag (type));
16283 equate_type_number_to_die (type, array_die);
16284 size = int_size_in_bytes (type);
16286 add_AT_unsigned (array_die, DW_AT_byte_size, size);
16287 else if (TYPE_DOMAIN (type) != NULL_TREE
16288 && TYPE_MAX_VALUE (TYPE_DOMAIN (type)) != NULL_TREE
16289 && DECL_P (TYPE_MAX_VALUE (TYPE_DOMAIN (type))))
16291 tree szdecl = TYPE_MAX_VALUE (TYPE_DOMAIN (type));
16292 dw_loc_list_ref loc = loc_list_from_tree (szdecl, 2);
16294 size = int_size_in_bytes (TREE_TYPE (szdecl));
16295 if (loc && size > 0)
16297 add_AT_location_description (array_die, DW_AT_string_length, loc);
16298 if (size != DWARF2_ADDR_SIZE)
16299 add_AT_unsigned (array_die, DW_AT_byte_size, size);
16305 /* ??? The SGI dwarf reader fails for array of array of enum types
16306 (e.g. const enum machine_mode insn_operand_mode[2][10]) unless the inner
16307 array type comes before the outer array type. We thus call gen_type_die
16308 before we new_die and must prevent nested array types collapsing for this
16311 #ifdef MIPS_DEBUGGING_INFO
16312 gen_type_die (TREE_TYPE (type), context_die);
16313 collapse_nested_arrays = false;
16316 array_die = new_die (DW_TAG_array_type, scope_die, type);
16317 add_name_attribute (array_die, type_tag (type));
16318 add_gnat_descriptive_type_attribute (array_die, type, context_die);
16319 if (TYPE_ARTIFICIAL (type))
16320 add_AT_flag (array_die, DW_AT_artificial, 1);
16321 equate_type_number_to_die (type, array_die);
16323 if (TREE_CODE (type) == VECTOR_TYPE)
16324 add_AT_flag (array_die, DW_AT_GNU_vector, 1);
16326 /* For Fortran multidimensional arrays use DW_ORD_col_major ordering. */
16328 && TREE_CODE (type) == ARRAY_TYPE
16329 && TREE_CODE (TREE_TYPE (type)) == ARRAY_TYPE
16330 && !TYPE_STRING_FLAG (TREE_TYPE (type)))
16331 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_col_major);
16334 /* We default the array ordering. SDB will probably do
16335 the right things even if DW_AT_ordering is not present. It's not even
16336 an issue until we start to get into multidimensional arrays anyway. If
16337 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
16338 then we'll have to put the DW_AT_ordering attribute back in. (But if
16339 and when we find out that we need to put these in, we will only do so
16340 for multidimensional arrays. */
16341 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
16344 #ifdef MIPS_DEBUGGING_INFO
16345 /* The SGI compilers handle arrays of unknown bound by setting
16346 AT_declaration and not emitting any subrange DIEs. */
16347 if (TREE_CODE (type) == ARRAY_TYPE
16348 && ! TYPE_DOMAIN (type))
16349 add_AT_flag (array_die, DW_AT_declaration, 1);
16352 if (TREE_CODE (type) == VECTOR_TYPE)
16354 /* For VECTOR_TYPEs we use an array die with appropriate bounds. */
16355 dw_die_ref subrange_die = new_die (DW_TAG_subrange_type, array_die, NULL);
16356 add_bound_info (subrange_die, DW_AT_lower_bound, size_zero_node);
16357 add_bound_info (subrange_die, DW_AT_upper_bound,
16358 size_int (TYPE_VECTOR_SUBPARTS (type) - 1));
16361 add_subscript_info (array_die, type, collapse_nested_arrays);
16363 /* Add representation of the type of the elements of this array type and
16364 emit the corresponding DIE if we haven't done it already. */
16365 element_type = TREE_TYPE (type);
16366 if (collapse_nested_arrays)
16367 while (TREE_CODE (element_type) == ARRAY_TYPE)
16369 if (TYPE_STRING_FLAG (element_type) && is_fortran ())
16371 element_type = TREE_TYPE (element_type);
16374 #ifndef MIPS_DEBUGGING_INFO
16375 gen_type_die (element_type, context_die);
16378 add_type_attribute (array_die, element_type, 0, 0, context_die);
16380 if (get_AT (array_die, DW_AT_name))
16381 add_pubtype (type, array_die);
16384 static dw_loc_descr_ref
16385 descr_info_loc (tree val, tree base_decl)
16387 HOST_WIDE_INT size;
16388 dw_loc_descr_ref loc, loc2;
16389 enum dwarf_location_atom op;
16391 if (val == base_decl)
16392 return new_loc_descr (DW_OP_push_object_address, 0, 0);
16394 switch (TREE_CODE (val))
16397 return descr_info_loc (TREE_OPERAND (val, 0), base_decl);
16399 return loc_descriptor_from_tree (val, 0);
16401 if (host_integerp (val, 0))
16402 return int_loc_descriptor (tree_low_cst (val, 0));
16405 size = int_size_in_bytes (TREE_TYPE (val));
16408 loc = descr_info_loc (TREE_OPERAND (val, 0), base_decl);
16411 if (size == DWARF2_ADDR_SIZE)
16412 add_loc_descr (&loc, new_loc_descr (DW_OP_deref, 0, 0));
16414 add_loc_descr (&loc, new_loc_descr (DW_OP_deref_size, size, 0));
16416 case POINTER_PLUS_EXPR:
16418 if (host_integerp (TREE_OPERAND (val, 1), 1)
16419 && (unsigned HOST_WIDE_INT) tree_low_cst (TREE_OPERAND (val, 1), 1)
16422 loc = descr_info_loc (TREE_OPERAND (val, 0), base_decl);
16425 loc_descr_plus_const (&loc, tree_low_cst (TREE_OPERAND (val, 1), 0));
16431 loc = descr_info_loc (TREE_OPERAND (val, 0), base_decl);
16434 loc2 = descr_info_loc (TREE_OPERAND (val, 1), base_decl);
16437 add_loc_descr (&loc, loc2);
16438 add_loc_descr (&loc2, new_loc_descr (op, 0, 0));
16460 add_descr_info_field (dw_die_ref die, enum dwarf_attribute attr,
16461 tree val, tree base_decl)
16463 dw_loc_descr_ref loc;
16465 if (host_integerp (val, 0))
16467 add_AT_unsigned (die, attr, tree_low_cst (val, 0));
16471 loc = descr_info_loc (val, base_decl);
16475 add_AT_loc (die, attr, loc);
16478 /* This routine generates DIE for array with hidden descriptor, details
16479 are filled into *info by a langhook. */
16482 gen_descr_array_type_die (tree type, struct array_descr_info *info,
16483 dw_die_ref context_die)
16485 dw_die_ref scope_die = scope_die_for (type, context_die);
16486 dw_die_ref array_die;
16489 array_die = new_die (DW_TAG_array_type, scope_die, type);
16490 add_name_attribute (array_die, type_tag (type));
16491 equate_type_number_to_die (type, array_die);
16493 /* For Fortran multidimensional arrays use DW_ORD_col_major ordering. */
16495 && info->ndimensions >= 2)
16496 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_col_major);
16498 if (info->data_location)
16499 add_descr_info_field (array_die, DW_AT_data_location, info->data_location,
16501 if (info->associated)
16502 add_descr_info_field (array_die, DW_AT_associated, info->associated,
16504 if (info->allocated)
16505 add_descr_info_field (array_die, DW_AT_allocated, info->allocated,
16508 for (dim = 0; dim < info->ndimensions; dim++)
16510 dw_die_ref subrange_die
16511 = new_die (DW_TAG_subrange_type, array_die, NULL);
16513 if (info->dimen[dim].lower_bound)
16515 /* If it is the default value, omit it. */
16518 if (host_integerp (info->dimen[dim].lower_bound, 0)
16519 && (dflt = lower_bound_default ()) != -1
16520 && tree_low_cst (info->dimen[dim].lower_bound, 0) == dflt)
16523 add_descr_info_field (subrange_die, DW_AT_lower_bound,
16524 info->dimen[dim].lower_bound,
16527 if (info->dimen[dim].upper_bound)
16528 add_descr_info_field (subrange_die, DW_AT_upper_bound,
16529 info->dimen[dim].upper_bound,
16531 if (info->dimen[dim].stride)
16532 add_descr_info_field (subrange_die, DW_AT_byte_stride,
16533 info->dimen[dim].stride,
16537 gen_type_die (info->element_type, context_die);
16538 add_type_attribute (array_die, info->element_type, 0, 0, context_die);
16540 if (get_AT (array_die, DW_AT_name))
16541 add_pubtype (type, array_die);
16546 gen_entry_point_die (tree decl, dw_die_ref context_die)
16548 tree origin = decl_ultimate_origin (decl);
16549 dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die, decl);
16551 if (origin != NULL)
16552 add_abstract_origin_attribute (decl_die, origin);
16555 add_name_and_src_coords_attributes (decl_die, decl);
16556 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
16557 0, 0, context_die);
16560 if (DECL_ABSTRACT (decl))
16561 equate_decl_number_to_die (decl, decl_die);
16563 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
16567 /* Walk through the list of incomplete types again, trying once more to
16568 emit full debugging info for them. */
16571 retry_incomplete_types (void)
16575 for (i = VEC_length (tree, incomplete_types) - 1; i >= 0; i--)
16576 if (should_emit_struct_debug (VEC_index (tree, incomplete_types, i),
16577 DINFO_USAGE_DIR_USE))
16578 gen_type_die (VEC_index (tree, incomplete_types, i), comp_unit_die ());
16581 /* Determine what tag to use for a record type. */
16583 static enum dwarf_tag
16584 record_type_tag (tree type)
16586 if (! lang_hooks.types.classify_record)
16587 return DW_TAG_structure_type;
16589 switch (lang_hooks.types.classify_record (type))
16591 case RECORD_IS_STRUCT:
16592 return DW_TAG_structure_type;
16594 case RECORD_IS_CLASS:
16595 return DW_TAG_class_type;
16597 case RECORD_IS_INTERFACE:
16598 if (dwarf_version >= 3 || !dwarf_strict)
16599 return DW_TAG_interface_type;
16600 return DW_TAG_structure_type;
16603 gcc_unreachable ();
16607 /* Generate a DIE to represent an enumeration type. Note that these DIEs
16608 include all of the information about the enumeration values also. Each
16609 enumerated type name/value is listed as a child of the enumerated type
16613 gen_enumeration_type_die (tree type, dw_die_ref context_die)
16615 dw_die_ref type_die = lookup_type_die (type);
16617 if (type_die == NULL)
16619 type_die = new_die (DW_TAG_enumeration_type,
16620 scope_die_for (type, context_die), type);
16621 equate_type_number_to_die (type, type_die);
16622 add_name_attribute (type_die, type_tag (type));
16623 add_gnat_descriptive_type_attribute (type_die, type, context_die);
16624 if (TYPE_ARTIFICIAL (type))
16625 add_AT_flag (type_die, DW_AT_artificial, 1);
16626 if (dwarf_version >= 4 || !dwarf_strict)
16628 if (ENUM_IS_SCOPED (type))
16629 add_AT_flag (type_die, DW_AT_enum_class, 1);
16630 if (ENUM_IS_OPAQUE (type))
16631 add_AT_flag (type_die, DW_AT_declaration, 1);
16634 else if (! TYPE_SIZE (type))
16637 remove_AT (type_die, DW_AT_declaration);
16639 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
16640 given enum type is incomplete, do not generate the DW_AT_byte_size
16641 attribute or the DW_AT_element_list attribute. */
16642 if (TYPE_SIZE (type))
16646 TREE_ASM_WRITTEN (type) = 1;
16647 add_byte_size_attribute (type_die, type);
16648 if (TYPE_STUB_DECL (type) != NULL_TREE)
16650 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
16651 add_accessibility_attribute (type_die, TYPE_STUB_DECL (type));
16654 /* If the first reference to this type was as the return type of an
16655 inline function, then it may not have a parent. Fix this now. */
16656 if (type_die->die_parent == NULL)
16657 add_child_die (scope_die_for (type, context_die), type_die);
16659 for (link = TYPE_VALUES (type);
16660 link != NULL; link = TREE_CHAIN (link))
16662 dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die, link);
16663 tree value = TREE_VALUE (link);
16665 add_name_attribute (enum_die,
16666 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
16668 if (TREE_CODE (value) == CONST_DECL)
16669 value = DECL_INITIAL (value);
16671 if (host_integerp (value, TYPE_UNSIGNED (TREE_TYPE (value))))
16672 /* DWARF2 does not provide a way of indicating whether or
16673 not enumeration constants are signed or unsigned. GDB
16674 always assumes the values are signed, so we output all
16675 values as if they were signed. That means that
16676 enumeration constants with very large unsigned values
16677 will appear to have negative values in the debugger. */
16678 add_AT_int (enum_die, DW_AT_const_value,
16679 tree_low_cst (value, tree_int_cst_sgn (value) > 0));
16683 add_AT_flag (type_die, DW_AT_declaration, 1);
16685 if (get_AT (type_die, DW_AT_name))
16686 add_pubtype (type, type_die);
16691 /* Generate a DIE to represent either a real live formal parameter decl or to
16692 represent just the type of some formal parameter position in some function
16695 Note that this routine is a bit unusual because its argument may be a
16696 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
16697 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
16698 node. If it's the former then this function is being called to output a
16699 DIE to represent a formal parameter object (or some inlining thereof). If
16700 it's the latter, then this function is only being called to output a
16701 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
16702 argument type of some subprogram type.
16703 If EMIT_NAME_P is true, name and source coordinate attributes
16707 gen_formal_parameter_die (tree node, tree origin, bool emit_name_p,
16708 dw_die_ref context_die)
16710 tree node_or_origin = node ? node : origin;
16711 tree ultimate_origin;
16712 dw_die_ref parm_die
16713 = new_die (DW_TAG_formal_parameter, context_die, node);
16715 switch (TREE_CODE_CLASS (TREE_CODE (node_or_origin)))
16717 case tcc_declaration:
16718 ultimate_origin = decl_ultimate_origin (node_or_origin);
16719 if (node || ultimate_origin)
16720 origin = ultimate_origin;
16721 if (origin != NULL)
16722 add_abstract_origin_attribute (parm_die, origin);
16723 else if (emit_name_p)
16724 add_name_and_src_coords_attributes (parm_die, node);
16726 || (! DECL_ABSTRACT (node_or_origin)
16727 && variably_modified_type_p (TREE_TYPE (node_or_origin),
16728 decl_function_context
16729 (node_or_origin))))
16731 tree type = TREE_TYPE (node_or_origin);
16732 if (decl_by_reference_p (node_or_origin))
16733 add_type_attribute (parm_die, TREE_TYPE (type), 0, 0,
16736 add_type_attribute (parm_die, type,
16737 TREE_READONLY (node_or_origin),
16738 TREE_THIS_VOLATILE (node_or_origin),
16741 if (origin == NULL && DECL_ARTIFICIAL (node))
16742 add_AT_flag (parm_die, DW_AT_artificial, 1);
16744 if (node && node != origin)
16745 equate_decl_number_to_die (node, parm_die);
16746 if (! DECL_ABSTRACT (node_or_origin))
16747 add_location_or_const_value_attribute (parm_die, node_or_origin,
16748 node == NULL, DW_AT_location);
16753 /* We were called with some kind of a ..._TYPE node. */
16754 add_type_attribute (parm_die, node_or_origin, 0, 0, context_die);
16758 gcc_unreachable ();
16764 /* Generate and return a DW_TAG_GNU_formal_parameter_pack. Also generate
16765 children DW_TAG_formal_parameter DIEs representing the arguments of the
16768 PARM_PACK must be a function parameter pack.
16769 PACK_ARG is the first argument of the parameter pack. Its TREE_CHAIN
16770 must point to the subsequent arguments of the function PACK_ARG belongs to.
16771 SUBR_DIE is the DIE of the function PACK_ARG belongs to.
16772 If NEXT_ARG is non NULL, *NEXT_ARG is set to the function argument
16773 following the last one for which a DIE was generated. */
16776 gen_formal_parameter_pack_die (tree parm_pack,
16778 dw_die_ref subr_die,
16782 dw_die_ref parm_pack_die;
16784 gcc_assert (parm_pack
16785 && lang_hooks.function_parameter_pack_p (parm_pack)
16788 parm_pack_die = new_die (DW_TAG_GNU_formal_parameter_pack, subr_die, parm_pack);
16789 add_src_coords_attributes (parm_pack_die, parm_pack);
16791 for (arg = pack_arg; arg; arg = DECL_CHAIN (arg))
16793 if (! lang_hooks.decls.function_parm_expanded_from_pack_p (arg,
16796 gen_formal_parameter_die (arg, NULL,
16797 false /* Don't emit name attribute. */,
16802 return parm_pack_die;
16805 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
16806 at the end of an (ANSI prototyped) formal parameters list. */
16809 gen_unspecified_parameters_die (tree decl_or_type, dw_die_ref context_die)
16811 new_die (DW_TAG_unspecified_parameters, context_die, decl_or_type);
16814 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
16815 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
16816 parameters as specified in some function type specification (except for
16817 those which appear as part of a function *definition*). */
16820 gen_formal_types_die (tree function_or_method_type, dw_die_ref context_die)
16823 tree formal_type = NULL;
16824 tree first_parm_type;
16827 if (TREE_CODE (function_or_method_type) == FUNCTION_DECL)
16829 arg = DECL_ARGUMENTS (function_or_method_type);
16830 function_or_method_type = TREE_TYPE (function_or_method_type);
16835 first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
16837 /* Make our first pass over the list of formal parameter types and output a
16838 DW_TAG_formal_parameter DIE for each one. */
16839 for (link = first_parm_type; link; )
16841 dw_die_ref parm_die;
16843 formal_type = TREE_VALUE (link);
16844 if (formal_type == void_type_node)
16847 /* Output a (nameless) DIE to represent the formal parameter itself. */
16848 parm_die = gen_formal_parameter_die (formal_type, NULL,
16849 true /* Emit name attribute. */,
16851 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
16852 && link == first_parm_type)
16854 add_AT_flag (parm_die, DW_AT_artificial, 1);
16855 if (dwarf_version >= 3 || !dwarf_strict)
16856 add_AT_die_ref (context_die, DW_AT_object_pointer, parm_die);
16858 else if (arg && DECL_ARTIFICIAL (arg))
16859 add_AT_flag (parm_die, DW_AT_artificial, 1);
16861 link = TREE_CHAIN (link);
16863 arg = DECL_CHAIN (arg);
16866 /* If this function type has an ellipsis, add a
16867 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
16868 if (formal_type != void_type_node)
16869 gen_unspecified_parameters_die (function_or_method_type, context_die);
16871 /* Make our second (and final) pass over the list of formal parameter types
16872 and output DIEs to represent those types (as necessary). */
16873 for (link = TYPE_ARG_TYPES (function_or_method_type);
16874 link && TREE_VALUE (link);
16875 link = TREE_CHAIN (link))
16876 gen_type_die (TREE_VALUE (link), context_die);
16879 /* We want to generate the DIE for TYPE so that we can generate the
16880 die for MEMBER, which has been defined; we will need to refer back
16881 to the member declaration nested within TYPE. If we're trying to
16882 generate minimal debug info for TYPE, processing TYPE won't do the
16883 trick; we need to attach the member declaration by hand. */
16886 gen_type_die_for_member (tree type, tree member, dw_die_ref context_die)
16888 gen_type_die (type, context_die);
16890 /* If we're trying to avoid duplicate debug info, we may not have
16891 emitted the member decl for this function. Emit it now. */
16892 if (TYPE_STUB_DECL (type)
16893 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))
16894 && ! lookup_decl_die (member))
16896 dw_die_ref type_die;
16897 gcc_assert (!decl_ultimate_origin (member));
16899 push_decl_scope (type);
16900 type_die = lookup_type_die_strip_naming_typedef (type);
16901 if (TREE_CODE (member) == FUNCTION_DECL)
16902 gen_subprogram_die (member, type_die);
16903 else if (TREE_CODE (member) == FIELD_DECL)
16905 /* Ignore the nameless fields that are used to skip bits but handle
16906 C++ anonymous unions and structs. */
16907 if (DECL_NAME (member) != NULL_TREE
16908 || TREE_CODE (TREE_TYPE (member)) == UNION_TYPE
16909 || TREE_CODE (TREE_TYPE (member)) == RECORD_TYPE)
16911 gen_type_die (member_declared_type (member), type_die);
16912 gen_field_die (member, type_die);
16916 gen_variable_die (member, NULL_TREE, type_die);
16922 /* Generate the DWARF2 info for the "abstract" instance of a function which we
16923 may later generate inlined and/or out-of-line instances of. */
16926 dwarf2out_abstract_function (tree decl)
16928 dw_die_ref old_die;
16932 htab_t old_decl_loc_table;
16933 htab_t old_cached_dw_loc_list_table;
16934 int old_call_site_count, old_tail_call_site_count;
16935 struct call_arg_loc_node *old_call_arg_locations;
16937 /* Make sure we have the actual abstract inline, not a clone. */
16938 decl = DECL_ORIGIN (decl);
16940 old_die = lookup_decl_die (decl);
16941 if (old_die && get_AT (old_die, DW_AT_inline))
16942 /* We've already generated the abstract instance. */
16945 /* We can be called while recursively when seeing block defining inlined subroutine
16946 DIE. Be sure to not clobber the outer location table nor use it or we would
16947 get locations in abstract instantces. */
16948 old_decl_loc_table = decl_loc_table;
16949 decl_loc_table = NULL;
16950 old_cached_dw_loc_list_table = cached_dw_loc_list_table;
16951 cached_dw_loc_list_table = NULL;
16952 old_call_arg_locations = call_arg_locations;
16953 call_arg_locations = NULL;
16954 old_call_site_count = call_site_count;
16955 call_site_count = -1;
16956 old_tail_call_site_count = tail_call_site_count;
16957 tail_call_site_count = -1;
16959 /* Be sure we've emitted the in-class declaration DIE (if any) first, so
16960 we don't get confused by DECL_ABSTRACT. */
16961 if (debug_info_level > DINFO_LEVEL_TERSE)
16963 context = decl_class_context (decl);
16965 gen_type_die_for_member
16966 (context, decl, decl_function_context (decl) ? NULL : comp_unit_die ());
16969 /* Pretend we've just finished compiling this function. */
16970 save_fn = current_function_decl;
16971 current_function_decl = decl;
16972 push_cfun (DECL_STRUCT_FUNCTION (decl));
16974 was_abstract = DECL_ABSTRACT (decl);
16975 set_decl_abstract_flags (decl, 1);
16976 dwarf2out_decl (decl);
16977 if (! was_abstract)
16978 set_decl_abstract_flags (decl, 0);
16980 current_function_decl = save_fn;
16981 decl_loc_table = old_decl_loc_table;
16982 cached_dw_loc_list_table = old_cached_dw_loc_list_table;
16983 call_arg_locations = old_call_arg_locations;
16984 call_site_count = old_call_site_count;
16985 tail_call_site_count = old_tail_call_site_count;
16989 /* Helper function of premark_used_types() which gets called through
16992 Marks the DIE of a given type in *SLOT as perennial, so it never gets
16993 marked as unused by prune_unused_types. */
16996 premark_used_types_helper (void **slot, void *data ATTRIBUTE_UNUSED)
17001 type = (tree) *slot;
17002 die = lookup_type_die (type);
17004 die->die_perennial_p = 1;
17008 /* Helper function of premark_types_used_by_global_vars which gets called
17009 through htab_traverse.
17011 Marks the DIE of a given type in *SLOT as perennial, so it never gets
17012 marked as unused by prune_unused_types. The DIE of the type is marked
17013 only if the global variable using the type will actually be emitted. */
17016 premark_types_used_by_global_vars_helper (void **slot,
17017 void *data ATTRIBUTE_UNUSED)
17019 struct types_used_by_vars_entry *entry;
17022 entry = (struct types_used_by_vars_entry *) *slot;
17023 gcc_assert (entry->type != NULL
17024 && entry->var_decl != NULL);
17025 die = lookup_type_die (entry->type);
17028 /* Ask cgraph if the global variable really is to be emitted.
17029 If yes, then we'll keep the DIE of ENTRY->TYPE. */
17030 struct varpool_node *node = varpool_get_node (entry->var_decl);
17031 if (node && node->needed)
17033 die->die_perennial_p = 1;
17034 /* Keep the parent DIEs as well. */
17035 while ((die = die->die_parent) && die->die_perennial_p == 0)
17036 die->die_perennial_p = 1;
17042 /* Mark all members of used_types_hash as perennial. */
17045 premark_used_types (void)
17047 if (cfun && cfun->used_types_hash)
17048 htab_traverse (cfun->used_types_hash, premark_used_types_helper, NULL);
17051 /* Mark all members of types_used_by_vars_entry as perennial. */
17054 premark_types_used_by_global_vars (void)
17056 if (types_used_by_vars_hash)
17057 htab_traverse (types_used_by_vars_hash,
17058 premark_types_used_by_global_vars_helper, NULL);
17061 /* Generate a DW_TAG_GNU_call_site DIE in function DECL under SUBR_DIE
17062 for CA_LOC call arg loc node. */
17065 gen_call_site_die (tree decl, dw_die_ref subr_die,
17066 struct call_arg_loc_node *ca_loc)
17068 dw_die_ref stmt_die = NULL, die;
17069 tree block = ca_loc->block;
17072 && block != DECL_INITIAL (decl)
17073 && TREE_CODE (block) == BLOCK)
17075 if (VEC_length (dw_die_ref, block_map) > BLOCK_NUMBER (block))
17076 stmt_die = VEC_index (dw_die_ref, block_map, BLOCK_NUMBER (block));
17079 block = BLOCK_SUPERCONTEXT (block);
17081 if (stmt_die == NULL)
17082 stmt_die = subr_die;
17083 die = new_die (DW_TAG_GNU_call_site, stmt_die, NULL_TREE);
17084 add_AT_lbl_id (die, DW_AT_low_pc, ca_loc->label);
17085 if (ca_loc->tail_call_p)
17086 add_AT_flag (die, DW_AT_GNU_tail_call, 1);
17087 if (ca_loc->symbol_ref)
17089 dw_die_ref tdie = lookup_decl_die (SYMBOL_REF_DECL (ca_loc->symbol_ref));
17091 add_AT_die_ref (die, DW_AT_abstract_origin, tdie);
17093 add_AT_addr (die, DW_AT_abstract_origin, ca_loc->symbol_ref);
17098 /* Generate a DIE to represent a declared function (either file-scope or
17102 gen_subprogram_die (tree decl, dw_die_ref context_die)
17104 tree origin = decl_ultimate_origin (decl);
17105 dw_die_ref subr_die;
17107 dw_die_ref old_die = lookup_decl_die (decl);
17108 int declaration = (current_function_decl != decl
17109 || class_or_namespace_scope_p (context_die));
17111 premark_used_types ();
17113 /* It is possible to have both DECL_ABSTRACT and DECLARATION be true if we
17114 started to generate the abstract instance of an inline, decided to output
17115 its containing class, and proceeded to emit the declaration of the inline
17116 from the member list for the class. If so, DECLARATION takes priority;
17117 we'll get back to the abstract instance when done with the class. */
17119 /* The class-scope declaration DIE must be the primary DIE. */
17120 if (origin && declaration && class_or_namespace_scope_p (context_die))
17123 gcc_assert (!old_die);
17126 /* Now that the C++ front end lazily declares artificial member fns, we
17127 might need to retrofit the declaration into its class. */
17128 if (!declaration && !origin && !old_die
17129 && DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl))
17130 && !class_or_namespace_scope_p (context_die)
17131 && debug_info_level > DINFO_LEVEL_TERSE)
17132 old_die = force_decl_die (decl);
17134 if (origin != NULL)
17136 gcc_assert (!declaration || local_scope_p (context_die));
17138 /* Fixup die_parent for the abstract instance of a nested
17139 inline function. */
17140 if (old_die && old_die->die_parent == NULL)
17141 add_child_die (context_die, old_die);
17143 subr_die = new_die (DW_TAG_subprogram, context_die, decl);
17144 add_abstract_origin_attribute (subr_die, origin);
17145 /* This is where the actual code for a cloned function is.
17146 Let's emit linkage name attribute for it. This helps
17147 debuggers to e.g, set breakpoints into
17148 constructors/destructors when the user asks "break
17150 add_linkage_name (subr_die, decl);
17154 expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl));
17155 struct dwarf_file_data * file_index = lookup_filename (s.file);
17157 if (!get_AT_flag (old_die, DW_AT_declaration)
17158 /* We can have a normal definition following an inline one in the
17159 case of redefinition of GNU C extern inlines.
17160 It seems reasonable to use AT_specification in this case. */
17161 && !get_AT (old_die, DW_AT_inline))
17163 /* Detect and ignore this case, where we are trying to output
17164 something we have already output. */
17168 /* If the definition comes from the same place as the declaration,
17169 maybe use the old DIE. We always want the DIE for this function
17170 that has the *_pc attributes to be under comp_unit_die so the
17171 debugger can find it. We also need to do this for abstract
17172 instances of inlines, since the spec requires the out-of-line copy
17173 to have the same parent. For local class methods, this doesn't
17174 apply; we just use the old DIE. */
17175 if ((is_cu_die (old_die->die_parent) || context_die == NULL)
17176 && (DECL_ARTIFICIAL (decl)
17177 || (get_AT_file (old_die, DW_AT_decl_file) == file_index
17178 && (get_AT_unsigned (old_die, DW_AT_decl_line)
17179 == (unsigned) s.line))))
17181 subr_die = old_die;
17183 /* Clear out the declaration attribute and the formal parameters.
17184 Do not remove all children, because it is possible that this
17185 declaration die was forced using force_decl_die(). In such
17186 cases die that forced declaration die (e.g. TAG_imported_module)
17187 is one of the children that we do not want to remove. */
17188 remove_AT (subr_die, DW_AT_declaration);
17189 remove_AT (subr_die, DW_AT_object_pointer);
17190 remove_child_TAG (subr_die, DW_TAG_formal_parameter);
17194 subr_die = new_die (DW_TAG_subprogram, context_die, decl);
17195 add_AT_specification (subr_die, old_die);
17196 if (get_AT_file (old_die, DW_AT_decl_file) != file_index)
17197 add_AT_file (subr_die, DW_AT_decl_file, file_index);
17198 if (get_AT_unsigned (old_die, DW_AT_decl_line) != (unsigned) s.line)
17199 add_AT_unsigned (subr_die, DW_AT_decl_line, s.line);
17204 subr_die = new_die (DW_TAG_subprogram, context_die, decl);
17206 if (TREE_PUBLIC (decl))
17207 add_AT_flag (subr_die, DW_AT_external, 1);
17209 add_name_and_src_coords_attributes (subr_die, decl);
17210 if (debug_info_level > DINFO_LEVEL_TERSE)
17212 add_prototyped_attribute (subr_die, TREE_TYPE (decl));
17213 add_type_attribute (subr_die, TREE_TYPE (TREE_TYPE (decl)),
17214 0, 0, context_die);
17217 add_pure_or_virtual_attribute (subr_die, decl);
17218 if (DECL_ARTIFICIAL (decl))
17219 add_AT_flag (subr_die, DW_AT_artificial, 1);
17221 add_accessibility_attribute (subr_die, decl);
17226 if (!old_die || !get_AT (old_die, DW_AT_inline))
17228 add_AT_flag (subr_die, DW_AT_declaration, 1);
17230 /* If this is an explicit function declaration then generate
17231 a DW_AT_explicit attribute. */
17232 if (lang_hooks.decls.function_decl_explicit_p (decl)
17233 && (dwarf_version >= 3 || !dwarf_strict))
17234 add_AT_flag (subr_die, DW_AT_explicit, 1);
17236 /* The first time we see a member function, it is in the context of
17237 the class to which it belongs. We make sure of this by emitting
17238 the class first. The next time is the definition, which is
17239 handled above. The two may come from the same source text.
17241 Note that force_decl_die() forces function declaration die. It is
17242 later reused to represent definition. */
17243 equate_decl_number_to_die (decl, subr_die);
17246 else if (DECL_ABSTRACT (decl))
17248 if (DECL_DECLARED_INLINE_P (decl))
17250 if (cgraph_function_possibly_inlined_p (decl))
17251 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
17253 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined);
17257 if (cgraph_function_possibly_inlined_p (decl))
17258 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
17260 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_not_inlined);
17263 if (DECL_DECLARED_INLINE_P (decl)
17264 && lookup_attribute ("artificial", DECL_ATTRIBUTES (decl)))
17265 add_AT_flag (subr_die, DW_AT_artificial, 1);
17267 equate_decl_number_to_die (decl, subr_die);
17269 else if (!DECL_EXTERNAL (decl))
17271 HOST_WIDE_INT cfa_fb_offset;
17273 if (!old_die || !get_AT (old_die, DW_AT_inline))
17274 equate_decl_number_to_die (decl, subr_die);
17276 if (!flag_reorder_blocks_and_partition)
17278 dw_fde_ref fde = cfun->fde;
17279 if (fde->dw_fde_begin)
17281 /* We have already generated the labels. */
17282 add_AT_lbl_id (subr_die, DW_AT_low_pc, fde->dw_fde_begin);
17283 add_AT_lbl_id (subr_die, DW_AT_high_pc, fde->dw_fde_end);
17287 /* Create start/end labels and add the range. */
17288 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
17289 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
17290 current_function_funcdef_no);
17291 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
17292 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
17293 current_function_funcdef_no);
17294 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
17297 #if VMS_DEBUGGING_INFO
17298 /* HP OpenVMS Industry Standard 64: DWARF Extensions
17299 Section 2.3 Prologue and Epilogue Attributes:
17300 When a breakpoint is set on entry to a function, it is generally
17301 desirable for execution to be suspended, not on the very first
17302 instruction of the function, but rather at a point after the
17303 function's frame has been set up, after any language defined local
17304 declaration processing has been completed, and before execution of
17305 the first statement of the function begins. Debuggers generally
17306 cannot properly determine where this point is. Similarly for a
17307 breakpoint set on exit from a function. The prologue and epilogue
17308 attributes allow a compiler to communicate the location(s) to use. */
17311 if (fde->dw_fde_vms_end_prologue)
17312 add_AT_vms_delta (subr_die, DW_AT_HP_prologue,
17313 fde->dw_fde_begin, fde->dw_fde_vms_end_prologue);
17315 if (fde->dw_fde_vms_begin_epilogue)
17316 add_AT_vms_delta (subr_die, DW_AT_HP_epilogue,
17317 fde->dw_fde_begin, fde->dw_fde_vms_begin_epilogue);
17321 add_pubname (decl, subr_die);
17325 /* Generate pubnames entries for the split function code ranges. */
17326 dw_fde_ref fde = cfun->fde;
17328 if (fde->dw_fde_second_begin)
17330 if (dwarf_version >= 3 || !dwarf_strict)
17332 /* We should use ranges for non-contiguous code section
17333 addresses. Use the actual code range for the initial
17334 section, since the HOT/COLD labels might precede an
17335 alignment offset. */
17336 bool range_list_added = false;
17337 add_ranges_by_labels (subr_die, fde->dw_fde_begin,
17338 fde->dw_fde_end, &range_list_added);
17339 add_ranges_by_labels (subr_die, fde->dw_fde_second_begin,
17340 fde->dw_fde_second_end,
17341 &range_list_added);
17342 add_pubname (decl, subr_die);
17343 if (range_list_added)
17348 /* There is no real support in DW2 for this .. so we make
17349 a work-around. First, emit the pub name for the segment
17350 containing the function label. Then make and emit a
17351 simplified subprogram DIE for the second segment with the
17352 name pre-fixed by __hot/cold_sect_of_. We use the same
17353 linkage name for the second die so that gdb will find both
17354 sections when given "b foo". */
17355 const char *name = NULL;
17356 tree decl_name = DECL_NAME (decl);
17357 dw_die_ref seg_die;
17359 /* Do the 'primary' section. */
17360 add_AT_lbl_id (subr_die, DW_AT_low_pc,
17361 fde->dw_fde_begin);
17362 add_AT_lbl_id (subr_die, DW_AT_high_pc,
17365 add_pubname (decl, subr_die);
17367 /* Build a minimal DIE for the secondary section. */
17368 seg_die = new_die (DW_TAG_subprogram,
17369 subr_die->die_parent, decl);
17371 if (TREE_PUBLIC (decl))
17372 add_AT_flag (seg_die, DW_AT_external, 1);
17374 if (decl_name != NULL
17375 && IDENTIFIER_POINTER (decl_name) != NULL)
17377 name = dwarf2_name (decl, 1);
17378 if (! DECL_ARTIFICIAL (decl))
17379 add_src_coords_attributes (seg_die, decl);
17381 add_linkage_name (seg_die, decl);
17383 gcc_assert (name != NULL);
17384 add_pure_or_virtual_attribute (seg_die, decl);
17385 if (DECL_ARTIFICIAL (decl))
17386 add_AT_flag (seg_die, DW_AT_artificial, 1);
17388 name = concat ("__second_sect_of_", name, NULL);
17389 add_AT_lbl_id (seg_die, DW_AT_low_pc,
17390 fde->dw_fde_second_begin);
17391 add_AT_lbl_id (seg_die, DW_AT_high_pc,
17392 fde->dw_fde_second_end);
17393 add_name_attribute (seg_die, name);
17394 add_pubname_string (name, seg_die);
17399 add_AT_lbl_id (subr_die, DW_AT_low_pc, fde->dw_fde_begin);
17400 add_AT_lbl_id (subr_die, DW_AT_high_pc, fde->dw_fde_end);
17401 add_pubname (decl, subr_die);
17405 #ifdef MIPS_DEBUGGING_INFO
17406 /* Add a reference to the FDE for this routine. */
17407 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, cfun->fde->fde_index);
17410 cfa_fb_offset = CFA_FRAME_BASE_OFFSET (decl);
17412 /* We define the "frame base" as the function's CFA. This is more
17413 convenient for several reasons: (1) It's stable across the prologue
17414 and epilogue, which makes it better than just a frame pointer,
17415 (2) With dwarf3, there exists a one-byte encoding that allows us
17416 to reference the .debug_frame data by proxy, but failing that,
17417 (3) We can at least reuse the code inspection and interpretation
17418 code that determines the CFA position at various points in the
17420 if (dwarf_version >= 3)
17422 dw_loc_descr_ref op = new_loc_descr (DW_OP_call_frame_cfa, 0, 0);
17423 add_AT_loc (subr_die, DW_AT_frame_base, op);
17427 dw_loc_list_ref list = convert_cfa_to_fb_loc_list (cfa_fb_offset);
17428 if (list->dw_loc_next)
17429 add_AT_loc_list (subr_die, DW_AT_frame_base, list);
17431 add_AT_loc (subr_die, DW_AT_frame_base, list->expr);
17434 /* Compute a displacement from the "steady-state frame pointer" to
17435 the CFA. The former is what all stack slots and argument slots
17436 will reference in the rtl; the later is what we've told the
17437 debugger about. We'll need to adjust all frame_base references
17438 by this displacement. */
17439 compute_frame_pointer_to_fb_displacement (cfa_fb_offset);
17441 if (cfun->static_chain_decl)
17442 add_AT_location_description (subr_die, DW_AT_static_link,
17443 loc_list_from_tree (cfun->static_chain_decl, 2));
17446 /* Generate child dies for template paramaters. */
17447 if (debug_info_level > DINFO_LEVEL_TERSE)
17448 gen_generic_params_dies (decl);
17450 /* Now output descriptions of the arguments for this function. This gets
17451 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
17452 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
17453 `...' at the end of the formal parameter list. In order to find out if
17454 there was a trailing ellipsis or not, we must instead look at the type
17455 associated with the FUNCTION_DECL. This will be a node of type
17456 FUNCTION_TYPE. If the chain of type nodes hanging off of this
17457 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
17458 an ellipsis at the end. */
17460 /* In the case where we are describing a mere function declaration, all we
17461 need to do here (and all we *can* do here) is to describe the *types* of
17462 its formal parameters. */
17463 if (debug_info_level <= DINFO_LEVEL_TERSE)
17465 else if (declaration)
17466 gen_formal_types_die (decl, subr_die);
17469 /* Generate DIEs to represent all known formal parameters. */
17470 tree parm = DECL_ARGUMENTS (decl);
17471 tree generic_decl = lang_hooks.decls.get_generic_function_decl (decl);
17472 tree generic_decl_parm = generic_decl
17473 ? DECL_ARGUMENTS (generic_decl)
17476 /* Now we want to walk the list of parameters of the function and
17477 emit their relevant DIEs.
17479 We consider the case of DECL being an instance of a generic function
17480 as well as it being a normal function.
17482 If DECL is an instance of a generic function we walk the
17483 parameters of the generic function declaration _and_ the parameters of
17484 DECL itself. This is useful because we want to emit specific DIEs for
17485 function parameter packs and those are declared as part of the
17486 generic function declaration. In that particular case,
17487 the parameter pack yields a DW_TAG_GNU_formal_parameter_pack DIE.
17488 That DIE has children DIEs representing the set of arguments
17489 of the pack. Note that the set of pack arguments can be empty.
17490 In that case, the DW_TAG_GNU_formal_parameter_pack DIE will not have any
17493 Otherwise, we just consider the parameters of DECL. */
17494 while (generic_decl_parm || parm)
17496 if (generic_decl_parm
17497 && lang_hooks.function_parameter_pack_p (generic_decl_parm))
17498 gen_formal_parameter_pack_die (generic_decl_parm,
17503 dw_die_ref parm_die = gen_decl_die (parm, NULL, subr_die);
17505 if (parm == DECL_ARGUMENTS (decl)
17506 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE
17508 && (dwarf_version >= 3 || !dwarf_strict))
17509 add_AT_die_ref (subr_die, DW_AT_object_pointer, parm_die);
17511 parm = DECL_CHAIN (parm);
17514 if (generic_decl_parm)
17515 generic_decl_parm = DECL_CHAIN (generic_decl_parm);
17518 /* Decide whether we need an unspecified_parameters DIE at the end.
17519 There are 2 more cases to do this for: 1) the ansi ... declaration -
17520 this is detectable when the end of the arg list is not a
17521 void_type_node 2) an unprototyped function declaration (not a
17522 definition). This just means that we have no info about the
17523 parameters at all. */
17524 if (prototype_p (TREE_TYPE (decl)))
17526 /* This is the prototyped case, check for.... */
17527 if (stdarg_p (TREE_TYPE (decl)))
17528 gen_unspecified_parameters_die (decl, subr_die);
17530 else if (DECL_INITIAL (decl) == NULL_TREE)
17531 gen_unspecified_parameters_die (decl, subr_die);
17534 /* Output Dwarf info for all of the stuff within the body of the function
17535 (if it has one - it may be just a declaration). */
17536 outer_scope = DECL_INITIAL (decl);
17538 /* OUTER_SCOPE is a pointer to the outermost BLOCK node created to represent
17539 a function. This BLOCK actually represents the outermost binding contour
17540 for the function, i.e. the contour in which the function's formal
17541 parameters and labels get declared. Curiously, it appears that the front
17542 end doesn't actually put the PARM_DECL nodes for the current function onto
17543 the BLOCK_VARS list for this outer scope, but are strung off of the
17544 DECL_ARGUMENTS list for the function instead.
17546 The BLOCK_VARS list for the `outer_scope' does provide us with a list of
17547 the LABEL_DECL nodes for the function however, and we output DWARF info
17548 for those in decls_for_scope. Just within the `outer_scope' there will be
17549 a BLOCK node representing the function's outermost pair of curly braces,
17550 and any blocks used for the base and member initializers of a C++
17551 constructor function. */
17552 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
17554 int call_site_note_count = 0;
17555 int tail_call_site_note_count = 0;
17557 /* Emit a DW_TAG_variable DIE for a named return value. */
17558 if (DECL_NAME (DECL_RESULT (decl)))
17559 gen_decl_die (DECL_RESULT (decl), NULL, subr_die);
17561 current_function_has_inlines = 0;
17562 decls_for_scope (outer_scope, subr_die, 0);
17564 if (call_arg_locations && !dwarf_strict)
17566 struct call_arg_loc_node *ca_loc;
17567 for (ca_loc = call_arg_locations; ca_loc; ca_loc = ca_loc->next)
17569 dw_die_ref die = NULL;
17570 rtx tloc = NULL_RTX, tlocc = NULL_RTX;
17573 for (arg = NOTE_VAR_LOCATION (ca_loc->call_arg_loc_note);
17574 arg; arg = next_arg)
17576 dw_loc_descr_ref reg, val;
17577 enum machine_mode mode = GET_MODE (XEXP (XEXP (arg, 0), 1));
17578 dw_die_ref cdie, tdie = NULL;
17580 next_arg = XEXP (arg, 1);
17581 if (REG_P (XEXP (XEXP (arg, 0), 0))
17583 && MEM_P (XEXP (XEXP (next_arg, 0), 0))
17584 && REG_P (XEXP (XEXP (XEXP (next_arg, 0), 0), 0))
17585 && REGNO (XEXP (XEXP (arg, 0), 0))
17586 == REGNO (XEXP (XEXP (XEXP (next_arg, 0), 0), 0)))
17587 next_arg = XEXP (next_arg, 1);
17588 if (mode == VOIDmode)
17590 mode = GET_MODE (XEXP (XEXP (arg, 0), 0));
17591 if (mode == VOIDmode)
17592 mode = GET_MODE (XEXP (arg, 0));
17594 if (mode == VOIDmode || mode == BLKmode)
17596 if (XEXP (XEXP (arg, 0), 0) == pc_rtx)
17598 gcc_assert (ca_loc->symbol_ref == NULL_RTX);
17599 tloc = XEXP (XEXP (arg, 0), 1);
17602 else if (GET_CODE (XEXP (XEXP (arg, 0), 0)) == CLOBBER
17603 && XEXP (XEXP (XEXP (arg, 0), 0), 0) == pc_rtx)
17605 gcc_assert (ca_loc->symbol_ref == NULL_RTX);
17606 tlocc = XEXP (XEXP (arg, 0), 1);
17610 if (REG_P (XEXP (XEXP (arg, 0), 0)))
17611 reg = reg_loc_descriptor (XEXP (XEXP (arg, 0), 0),
17612 VAR_INIT_STATUS_INITIALIZED);
17613 else if (MEM_P (XEXP (XEXP (arg, 0), 0)))
17615 rtx mem = XEXP (XEXP (arg, 0), 0);
17616 reg = mem_loc_descriptor (XEXP (mem, 0),
17617 get_address_mode (mem),
17619 VAR_INIT_STATUS_INITIALIZED);
17621 else if (GET_CODE (XEXP (XEXP (arg, 0), 0))
17622 == DEBUG_PARAMETER_REF)
17625 = DEBUG_PARAMETER_REF_DECL (XEXP (XEXP (arg, 0), 0));
17626 tdie = lookup_decl_die (tdecl);
17633 && GET_CODE (XEXP (XEXP (arg, 0), 0))
17634 != DEBUG_PARAMETER_REF)
17636 val = mem_loc_descriptor (XEXP (XEXP (arg, 0), 1), mode,
17638 VAR_INIT_STATUS_INITIALIZED);
17642 die = gen_call_site_die (decl, subr_die, ca_loc);
17643 cdie = new_die (DW_TAG_GNU_call_site_parameter, die,
17646 add_AT_loc (cdie, DW_AT_location, reg);
17647 else if (tdie != NULL)
17648 add_AT_die_ref (cdie, DW_AT_abstract_origin, tdie);
17649 add_AT_loc (cdie, DW_AT_GNU_call_site_value, val);
17650 if (next_arg != XEXP (arg, 1))
17652 mode = GET_MODE (XEXP (XEXP (XEXP (arg, 1), 0), 1));
17653 if (mode == VOIDmode)
17654 mode = GET_MODE (XEXP (XEXP (XEXP (arg, 1), 0), 0));
17655 val = mem_loc_descriptor (XEXP (XEXP (XEXP (arg, 1),
17658 VAR_INIT_STATUS_INITIALIZED);
17660 add_AT_loc (cdie, DW_AT_GNU_call_site_data_value, val);
17664 && (ca_loc->symbol_ref || tloc))
17665 die = gen_call_site_die (decl, subr_die, ca_loc);
17666 if (die != NULL && (tloc != NULL_RTX || tlocc != NULL_RTX))
17668 dw_loc_descr_ref tval = NULL;
17670 if (tloc != NULL_RTX)
17671 tval = mem_loc_descriptor (tloc,
17672 GET_MODE (tloc) == VOIDmode
17673 ? Pmode : GET_MODE (tloc),
17675 VAR_INIT_STATUS_INITIALIZED);
17677 add_AT_loc (die, DW_AT_GNU_call_site_target, tval);
17678 else if (tlocc != NULL_RTX)
17680 tval = mem_loc_descriptor (tlocc,
17681 GET_MODE (tlocc) == VOIDmode
17682 ? Pmode : GET_MODE (tlocc),
17684 VAR_INIT_STATUS_INITIALIZED);
17686 add_AT_loc (die, DW_AT_GNU_call_site_target_clobbered,
17692 call_site_note_count++;
17693 if (ca_loc->tail_call_p)
17694 tail_call_site_note_count++;
17698 call_arg_locations = NULL;
17699 call_arg_loc_last = NULL;
17700 if (tail_call_site_count >= 0
17701 && tail_call_site_count == tail_call_site_note_count
17704 if (call_site_count >= 0
17705 && call_site_count == call_site_note_count)
17706 add_AT_flag (subr_die, DW_AT_GNU_all_call_sites, 1);
17708 add_AT_flag (subr_die, DW_AT_GNU_all_tail_call_sites, 1);
17710 call_site_count = -1;
17711 tail_call_site_count = -1;
17713 /* Add the calling convention attribute if requested. */
17714 add_calling_convention_attribute (subr_die, decl);
17718 /* Returns a hash value for X (which really is a die_struct). */
17721 common_block_die_table_hash (const void *x)
17723 const_dw_die_ref d = (const_dw_die_ref) x;
17724 return (hashval_t) d->decl_id ^ htab_hash_pointer (d->die_parent);
17727 /* Return nonzero if decl_id and die_parent of die_struct X is the same
17728 as decl_id and die_parent of die_struct Y. */
17731 common_block_die_table_eq (const void *x, const void *y)
17733 const_dw_die_ref d = (const_dw_die_ref) x;
17734 const_dw_die_ref e = (const_dw_die_ref) y;
17735 return d->decl_id == e->decl_id && d->die_parent == e->die_parent;
17738 /* Generate a DIE to represent a declared data object.
17739 Either DECL or ORIGIN must be non-null. */
17742 gen_variable_die (tree decl, tree origin, dw_die_ref context_die)
17746 tree decl_or_origin = decl ? decl : origin;
17747 tree ultimate_origin;
17748 dw_die_ref var_die;
17749 dw_die_ref old_die = decl ? lookup_decl_die (decl) : NULL;
17750 dw_die_ref origin_die;
17751 bool declaration = (DECL_EXTERNAL (decl_or_origin)
17752 || class_or_namespace_scope_p (context_die));
17753 bool specialization_p = false;
17755 ultimate_origin = decl_ultimate_origin (decl_or_origin);
17756 if (decl || ultimate_origin)
17757 origin = ultimate_origin;
17758 com_decl = fortran_common (decl_or_origin, &off);
17760 /* Symbol in common gets emitted as a child of the common block, in the form
17761 of a data member. */
17764 dw_die_ref com_die;
17765 dw_loc_list_ref loc;
17766 die_node com_die_arg;
17768 var_die = lookup_decl_die (decl_or_origin);
17771 if (get_AT (var_die, DW_AT_location) == NULL)
17773 loc = loc_list_from_tree (com_decl, off ? 1 : 2);
17778 /* Optimize the common case. */
17779 if (single_element_loc_list_p (loc)
17780 && loc->expr->dw_loc_opc == DW_OP_addr
17781 && loc->expr->dw_loc_next == NULL
17782 && GET_CODE (loc->expr->dw_loc_oprnd1.v.val_addr)
17784 loc->expr->dw_loc_oprnd1.v.val_addr
17785 = plus_constant (loc->expr->dw_loc_oprnd1.v.val_addr, off);
17787 loc_list_plus_const (loc, off);
17789 add_AT_location_description (var_die, DW_AT_location, loc);
17790 remove_AT (var_die, DW_AT_declaration);
17796 if (common_block_die_table == NULL)
17797 common_block_die_table
17798 = htab_create_ggc (10, common_block_die_table_hash,
17799 common_block_die_table_eq, NULL);
17801 com_die_arg.decl_id = DECL_UID (com_decl);
17802 com_die_arg.die_parent = context_die;
17803 com_die = (dw_die_ref) htab_find (common_block_die_table, &com_die_arg);
17804 loc = loc_list_from_tree (com_decl, 2);
17805 if (com_die == NULL)
17808 = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (com_decl));
17811 com_die = new_die (DW_TAG_common_block, context_die, decl);
17812 add_name_and_src_coords_attributes (com_die, com_decl);
17815 add_AT_location_description (com_die, DW_AT_location, loc);
17816 /* Avoid sharing the same loc descriptor between
17817 DW_TAG_common_block and DW_TAG_variable. */
17818 loc = loc_list_from_tree (com_decl, 2);
17820 else if (DECL_EXTERNAL (decl))
17821 add_AT_flag (com_die, DW_AT_declaration, 1);
17822 add_pubname_string (cnam, com_die); /* ??? needed? */
17823 com_die->decl_id = DECL_UID (com_decl);
17824 slot = htab_find_slot (common_block_die_table, com_die, INSERT);
17825 *slot = (void *) com_die;
17827 else if (get_AT (com_die, DW_AT_location) == NULL && loc)
17829 add_AT_location_description (com_die, DW_AT_location, loc);
17830 loc = loc_list_from_tree (com_decl, 2);
17831 remove_AT (com_die, DW_AT_declaration);
17833 var_die = new_die (DW_TAG_variable, com_die, decl);
17834 add_name_and_src_coords_attributes (var_die, decl);
17835 add_type_attribute (var_die, TREE_TYPE (decl), TREE_READONLY (decl),
17836 TREE_THIS_VOLATILE (decl), context_die);
17837 add_AT_flag (var_die, DW_AT_external, 1);
17842 /* Optimize the common case. */
17843 if (single_element_loc_list_p (loc)
17844 && loc->expr->dw_loc_opc == DW_OP_addr
17845 && loc->expr->dw_loc_next == NULL
17846 && GET_CODE (loc->expr->dw_loc_oprnd1.v.val_addr) == SYMBOL_REF)
17847 loc->expr->dw_loc_oprnd1.v.val_addr
17848 = plus_constant (loc->expr->dw_loc_oprnd1.v.val_addr, off);
17850 loc_list_plus_const (loc, off);
17852 add_AT_location_description (var_die, DW_AT_location, loc);
17854 else if (DECL_EXTERNAL (decl))
17855 add_AT_flag (var_die, DW_AT_declaration, 1);
17856 equate_decl_number_to_die (decl, var_die);
17860 /* If the compiler emitted a definition for the DECL declaration
17861 and if we already emitted a DIE for it, don't emit a second
17862 DIE for it again. Allow re-declarations of DECLs that are
17863 inside functions, though. */
17864 if (old_die && declaration && !local_scope_p (context_die))
17867 /* For static data members, the declaration in the class is supposed
17868 to have DW_TAG_member tag; the specification should still be
17869 DW_TAG_variable referencing the DW_TAG_member DIE. */
17870 if (declaration && class_scope_p (context_die))
17871 var_die = new_die (DW_TAG_member, context_die, decl);
17873 var_die = new_die (DW_TAG_variable, context_die, decl);
17876 if (origin != NULL)
17877 origin_die = add_abstract_origin_attribute (var_die, origin);
17879 /* Loop unrolling can create multiple blocks that refer to the same
17880 static variable, so we must test for the DW_AT_declaration flag.
17882 ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
17883 copy decls and set the DECL_ABSTRACT flag on them instead of
17886 ??? Duplicated blocks have been rewritten to use .debug_ranges.
17888 ??? The declare_in_namespace support causes us to get two DIEs for one
17889 variable, both of which are declarations. We want to avoid considering
17890 one to be a specification, so we must test that this DIE is not a
17892 else if (old_die && TREE_STATIC (decl) && ! declaration
17893 && get_AT_flag (old_die, DW_AT_declaration) == 1)
17895 /* This is a definition of a C++ class level static. */
17896 add_AT_specification (var_die, old_die);
17897 specialization_p = true;
17898 if (DECL_NAME (decl))
17900 expanded_location s = expand_location (DECL_SOURCE_LOCATION (decl));
17901 struct dwarf_file_data * file_index = lookup_filename (s.file);
17903 if (get_AT_file (old_die, DW_AT_decl_file) != file_index)
17904 add_AT_file (var_die, DW_AT_decl_file, file_index);
17906 if (get_AT_unsigned (old_die, DW_AT_decl_line) != (unsigned) s.line)
17907 add_AT_unsigned (var_die, DW_AT_decl_line, s.line);
17909 if (old_die->die_tag == DW_TAG_member)
17910 add_linkage_name (var_die, decl);
17914 add_name_and_src_coords_attributes (var_die, decl);
17916 if ((origin == NULL && !specialization_p)
17918 && !DECL_ABSTRACT (decl_or_origin)
17919 && variably_modified_type_p (TREE_TYPE (decl_or_origin),
17920 decl_function_context
17921 (decl_or_origin))))
17923 tree type = TREE_TYPE (decl_or_origin);
17925 if (decl_by_reference_p (decl_or_origin))
17926 add_type_attribute (var_die, TREE_TYPE (type), 0, 0, context_die);
17928 add_type_attribute (var_die, type, TREE_READONLY (decl_or_origin),
17929 TREE_THIS_VOLATILE (decl_or_origin), context_die);
17932 if (origin == NULL && !specialization_p)
17934 if (TREE_PUBLIC (decl))
17935 add_AT_flag (var_die, DW_AT_external, 1);
17937 if (DECL_ARTIFICIAL (decl))
17938 add_AT_flag (var_die, DW_AT_artificial, 1);
17940 add_accessibility_attribute (var_die, decl);
17944 add_AT_flag (var_die, DW_AT_declaration, 1);
17946 if (decl && (DECL_ABSTRACT (decl) || declaration || old_die == NULL))
17947 equate_decl_number_to_die (decl, var_die);
17950 && (! DECL_ABSTRACT (decl_or_origin)
17951 /* Local static vars are shared between all clones/inlines,
17952 so emit DW_AT_location on the abstract DIE if DECL_RTL is
17954 || (TREE_CODE (decl_or_origin) == VAR_DECL
17955 && TREE_STATIC (decl_or_origin)
17956 && DECL_RTL_SET_P (decl_or_origin)))
17957 /* When abstract origin already has DW_AT_location attribute, no need
17958 to add it again. */
17959 && (origin_die == NULL || get_AT (origin_die, DW_AT_location) == NULL))
17961 if (TREE_CODE (decl_or_origin) == VAR_DECL && TREE_STATIC (decl_or_origin)
17962 && !TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl_or_origin)))
17963 defer_location (decl_or_origin, var_die);
17965 add_location_or_const_value_attribute (var_die, decl_or_origin,
17966 decl == NULL, DW_AT_location);
17967 add_pubname (decl_or_origin, var_die);
17970 tree_add_const_value_attribute_for_decl (var_die, decl_or_origin);
17973 /* Generate a DIE to represent a named constant. */
17976 gen_const_die (tree decl, dw_die_ref context_die)
17978 dw_die_ref const_die;
17979 tree type = TREE_TYPE (decl);
17981 const_die = new_die (DW_TAG_constant, context_die, decl);
17982 add_name_and_src_coords_attributes (const_die, decl);
17983 add_type_attribute (const_die, type, 1, 0, context_die);
17984 if (TREE_PUBLIC (decl))
17985 add_AT_flag (const_die, DW_AT_external, 1);
17986 if (DECL_ARTIFICIAL (decl))
17987 add_AT_flag (const_die, DW_AT_artificial, 1);
17988 tree_add_const_value_attribute_for_decl (const_die, decl);
17991 /* Generate a DIE to represent a label identifier. */
17994 gen_label_die (tree decl, dw_die_ref context_die)
17996 tree origin = decl_ultimate_origin (decl);
17997 dw_die_ref lbl_die = new_die (DW_TAG_label, context_die, decl);
17999 char label[MAX_ARTIFICIAL_LABEL_BYTES];
18001 if (origin != NULL)
18002 add_abstract_origin_attribute (lbl_die, origin);
18004 add_name_and_src_coords_attributes (lbl_die, decl);
18006 if (DECL_ABSTRACT (decl))
18007 equate_decl_number_to_die (decl, lbl_die);
18010 insn = DECL_RTL_IF_SET (decl);
18012 /* Deleted labels are programmer specified labels which have been
18013 eliminated because of various optimizations. We still emit them
18014 here so that it is possible to put breakpoints on them. */
18018 && NOTE_KIND (insn) == NOTE_INSN_DELETED_LABEL))))
18020 /* When optimization is enabled (via -O) some parts of the compiler
18021 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
18022 represent source-level labels which were explicitly declared by
18023 the user. This really shouldn't be happening though, so catch
18024 it if it ever does happen. */
18025 gcc_assert (!INSN_DELETED_P (insn));
18027 ASM_GENERATE_INTERNAL_LABEL (label, "L", CODE_LABEL_NUMBER (insn));
18028 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
18032 && NOTE_KIND (insn) == NOTE_INSN_DELETED_DEBUG_LABEL
18033 && CODE_LABEL_NUMBER (insn) != -1)
18035 ASM_GENERATE_INTERNAL_LABEL (label, "LDL", CODE_LABEL_NUMBER (insn));
18036 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
18041 /* A helper function for gen_inlined_subroutine_die. Add source coordinate
18042 attributes to the DIE for a block STMT, to describe where the inlined
18043 function was called from. This is similar to add_src_coords_attributes. */
18046 add_call_src_coords_attributes (tree stmt, dw_die_ref die)
18048 expanded_location s = expand_location (BLOCK_SOURCE_LOCATION (stmt));
18050 if (dwarf_version >= 3 || !dwarf_strict)
18052 add_AT_file (die, DW_AT_call_file, lookup_filename (s.file));
18053 add_AT_unsigned (die, DW_AT_call_line, s.line);
18058 /* A helper function for gen_lexical_block_die and gen_inlined_subroutine_die.
18059 Add low_pc and high_pc attributes to the DIE for a block STMT. */
18062 add_high_low_attributes (tree stmt, dw_die_ref die)
18064 char label[MAX_ARTIFICIAL_LABEL_BYTES];
18066 if (BLOCK_FRAGMENT_CHAIN (stmt)
18067 && (dwarf_version >= 3 || !dwarf_strict))
18071 if (inlined_function_outer_scope_p (stmt))
18073 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
18074 BLOCK_NUMBER (stmt));
18075 add_AT_lbl_id (die, DW_AT_entry_pc, label);
18078 add_AT_range_list (die, DW_AT_ranges, add_ranges (stmt));
18080 chain = BLOCK_FRAGMENT_CHAIN (stmt);
18083 add_ranges (chain);
18084 chain = BLOCK_FRAGMENT_CHAIN (chain);
18091 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
18092 BLOCK_NUMBER (stmt));
18093 add_AT_lbl_id (die, DW_AT_low_pc, label);
18094 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
18095 BLOCK_NUMBER (stmt));
18096 add_AT_lbl_id (die, DW_AT_high_pc, label);
18100 /* Generate a DIE for a lexical block. */
18103 gen_lexical_block_die (tree stmt, dw_die_ref context_die, int depth)
18105 dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die, stmt);
18107 if (call_arg_locations)
18109 if (VEC_length (dw_die_ref, block_map) <= BLOCK_NUMBER (stmt))
18110 VEC_safe_grow_cleared (dw_die_ref, heap, block_map,
18111 BLOCK_NUMBER (stmt) + 1);
18112 VEC_replace (dw_die_ref, block_map, BLOCK_NUMBER (stmt), stmt_die);
18115 if (! BLOCK_ABSTRACT (stmt) && TREE_ASM_WRITTEN (stmt))
18116 add_high_low_attributes (stmt, stmt_die);
18118 decls_for_scope (stmt, stmt_die, depth);
18121 /* Generate a DIE for an inlined subprogram. */
18124 gen_inlined_subroutine_die (tree stmt, dw_die_ref context_die, int depth)
18128 /* The instance of function that is effectively being inlined shall not
18130 gcc_assert (! BLOCK_ABSTRACT (stmt));
18132 decl = block_ultimate_origin (stmt);
18134 /* Emit info for the abstract instance first, if we haven't yet. We
18135 must emit this even if the block is abstract, otherwise when we
18136 emit the block below (or elsewhere), we may end up trying to emit
18137 a die whose origin die hasn't been emitted, and crashing. */
18138 dwarf2out_abstract_function (decl);
18140 if (! BLOCK_ABSTRACT (stmt))
18142 dw_die_ref subr_die
18143 = new_die (DW_TAG_inlined_subroutine, context_die, stmt);
18145 if (call_arg_locations)
18147 if (VEC_length (dw_die_ref, block_map) <= BLOCK_NUMBER (stmt))
18148 VEC_safe_grow_cleared (dw_die_ref, heap, block_map,
18149 BLOCK_NUMBER (stmt) + 1);
18150 VEC_replace (dw_die_ref, block_map, BLOCK_NUMBER (stmt), subr_die);
18152 add_abstract_origin_attribute (subr_die, decl);
18153 if (TREE_ASM_WRITTEN (stmt))
18154 add_high_low_attributes (stmt, subr_die);
18155 add_call_src_coords_attributes (stmt, subr_die);
18157 decls_for_scope (stmt, subr_die, depth);
18158 current_function_has_inlines = 1;
18162 /* Generate a DIE for a field in a record, or structure. */
18165 gen_field_die (tree decl, dw_die_ref context_die)
18167 dw_die_ref decl_die;
18169 if (TREE_TYPE (decl) == error_mark_node)
18172 decl_die = new_die (DW_TAG_member, context_die, decl);
18173 add_name_and_src_coords_attributes (decl_die, decl);
18174 add_type_attribute (decl_die, member_declared_type (decl),
18175 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
18178 if (DECL_BIT_FIELD_TYPE (decl))
18180 add_byte_size_attribute (decl_die, decl);
18181 add_bit_size_attribute (decl_die, decl);
18182 add_bit_offset_attribute (decl_die, decl);
18185 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
18186 add_data_member_location_attribute (decl_die, decl);
18188 if (DECL_ARTIFICIAL (decl))
18189 add_AT_flag (decl_die, DW_AT_artificial, 1);
18191 add_accessibility_attribute (decl_die, decl);
18193 /* Equate decl number to die, so that we can look up this decl later on. */
18194 equate_decl_number_to_die (decl, decl_die);
18198 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
18199 Use modified_type_die instead.
18200 We keep this code here just in case these types of DIEs may be needed to
18201 represent certain things in other languages (e.g. Pascal) someday. */
18204 gen_pointer_type_die (tree type, dw_die_ref context_die)
18207 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die), type);
18209 equate_type_number_to_die (type, ptr_die);
18210 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
18211 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
18214 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
18215 Use modified_type_die instead.
18216 We keep this code here just in case these types of DIEs may be needed to
18217 represent certain things in other languages (e.g. Pascal) someday. */
18220 gen_reference_type_die (tree type, dw_die_ref context_die)
18222 dw_die_ref ref_die, scope_die = scope_die_for (type, context_die);
18224 if (TYPE_REF_IS_RVALUE (type) && dwarf_version >= 4)
18225 ref_die = new_die (DW_TAG_rvalue_reference_type, scope_die, type);
18227 ref_die = new_die (DW_TAG_reference_type, scope_die, type);
18229 equate_type_number_to_die (type, ref_die);
18230 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
18231 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
18235 /* Generate a DIE for a pointer to a member type. */
18238 gen_ptr_to_mbr_type_die (tree type, dw_die_ref context_die)
18241 = new_die (DW_TAG_ptr_to_member_type,
18242 scope_die_for (type, context_die), type);
18244 equate_type_number_to_die (type, ptr_die);
18245 add_AT_die_ref (ptr_die, DW_AT_containing_type,
18246 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
18247 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
18250 typedef const char *dchar_p; /* For DEF_VEC_P. */
18251 DEF_VEC_P(dchar_p);
18252 DEF_VEC_ALLOC_P(dchar_p,heap);
18254 static char *producer_string;
18256 /* Return a heap allocated producer string including command line options
18257 if -grecord-gcc-switches. */
18260 gen_producer_string (void)
18263 VEC(dchar_p, heap) *switches = NULL;
18264 const char *language_string = lang_hooks.name;
18265 char *producer, *tail;
18267 size_t len = dwarf_record_gcc_switches ? 0 : 3;
18268 size_t plen = strlen (language_string) + 1 + strlen (version_string);
18270 for (j = 1; dwarf_record_gcc_switches && j < save_decoded_options_count; j++)
18271 switch (save_decoded_options[j].opt_index)
18278 case OPT_auxbase_strip:
18287 case OPT_SPECIAL_unknown:
18288 case OPT_SPECIAL_ignore:
18289 case OPT_SPECIAL_program_name:
18290 case OPT_SPECIAL_input_file:
18291 case OPT_grecord_gcc_switches:
18292 case OPT_gno_record_gcc_switches:
18293 case OPT__output_pch_:
18294 case OPT_fdiagnostics_show_location_:
18295 case OPT_fdiagnostics_show_option:
18296 case OPT_fverbose_asm:
18298 case OPT__sysroot_:
18300 case OPT_nostdinc__:
18301 /* Ignore these. */
18304 gcc_checking_assert (save_decoded_options[j].canonical_option[0][0]
18306 switch (save_decoded_options[j].canonical_option[0][1])
18313 if (strncmp (save_decoded_options[j].canonical_option[0] + 2,
18320 VEC_safe_push (dchar_p, heap, switches,
18321 save_decoded_options[j].orig_option_with_args_text);
18322 len += strlen (save_decoded_options[j].orig_option_with_args_text) + 1;
18326 producer = XNEWVEC (char, plen + 1 + len + 1);
18328 sprintf (tail, "%s %s", language_string, version_string);
18331 if (!dwarf_record_gcc_switches)
18333 #ifdef MIPS_DEBUGGING_INFO
18334 /* The MIPS/SGI compilers place the 'cc' command line options in the
18335 producer string. The SGI debugger looks for -g, -g1, -g2, or -g3;
18336 if they do not appear in the producer string, the debugger reaches
18337 the conclusion that the object file is stripped and has no debugging
18338 information. To get the MIPS/SGI debugger to believe that there is
18339 debugging information in the object file, we add a -g to the producer
18341 if (debug_info_level > DINFO_LEVEL_TERSE)
18343 memcpy (tail, " -g", 3);
18349 FOR_EACH_VEC_ELT (dchar_p, switches, j, p)
18353 memcpy (tail + 1, p, len);
18358 VEC_free (dchar_p, heap, switches);
18362 /* Generate the DIE for the compilation unit. */
18365 gen_compile_unit_die (const char *filename)
18368 const char *language_string = lang_hooks.name;
18371 die = new_die (DW_TAG_compile_unit, NULL, NULL);
18375 add_name_attribute (die, filename);
18376 /* Don't add cwd for <built-in>. */
18377 if (!IS_ABSOLUTE_PATH (filename) && filename[0] != '<')
18378 add_comp_dir_attribute (die);
18381 if (producer_string == NULL)
18382 producer_string = gen_producer_string ();
18383 add_AT_string (die, DW_AT_producer, producer_string);
18385 /* If our producer is LTO try to figure out a common language to use
18386 from the global list of translation units. */
18387 if (strcmp (language_string, "GNU GIMPLE") == 0)
18391 const char *common_lang = NULL;
18393 FOR_EACH_VEC_ELT (tree, all_translation_units, i, t)
18395 if (!TRANSLATION_UNIT_LANGUAGE (t))
18398 common_lang = TRANSLATION_UNIT_LANGUAGE (t);
18399 else if (strcmp (common_lang, TRANSLATION_UNIT_LANGUAGE (t)) == 0)
18401 else if (strncmp (common_lang, "GNU C", 5) == 0
18402 && strncmp (TRANSLATION_UNIT_LANGUAGE (t), "GNU C", 5) == 0)
18403 /* Mixing C and C++ is ok, use C++ in that case. */
18404 common_lang = "GNU C++";
18407 /* Fall back to C. */
18408 common_lang = NULL;
18414 language_string = common_lang;
18417 language = DW_LANG_C89;
18418 if (strcmp (language_string, "GNU C++") == 0)
18419 language = DW_LANG_C_plus_plus;
18420 else if (strcmp (language_string, "GNU F77") == 0)
18421 language = DW_LANG_Fortran77;
18422 else if (strcmp (language_string, "GNU Pascal") == 0)
18423 language = DW_LANG_Pascal83;
18424 else if (dwarf_version >= 3 || !dwarf_strict)
18426 if (strcmp (language_string, "GNU Ada") == 0)
18427 language = DW_LANG_Ada95;
18428 else if (strcmp (language_string, "GNU Fortran") == 0)
18429 language = DW_LANG_Fortran95;
18430 else if (strcmp (language_string, "GNU Java") == 0)
18431 language = DW_LANG_Java;
18432 else if (strcmp (language_string, "GNU Objective-C") == 0)
18433 language = DW_LANG_ObjC;
18434 else if (strcmp (language_string, "GNU Objective-C++") == 0)
18435 language = DW_LANG_ObjC_plus_plus;
18438 add_AT_unsigned (die, DW_AT_language, language);
18442 case DW_LANG_Fortran77:
18443 case DW_LANG_Fortran90:
18444 case DW_LANG_Fortran95:
18445 /* Fortran has case insensitive identifiers and the front-end
18446 lowercases everything. */
18447 add_AT_unsigned (die, DW_AT_identifier_case, DW_ID_down_case);
18450 /* The default DW_ID_case_sensitive doesn't need to be specified. */
18456 /* Generate the DIE for a base class. */
18459 gen_inheritance_die (tree binfo, tree access, dw_die_ref context_die)
18461 dw_die_ref die = new_die (DW_TAG_inheritance, context_die, binfo);
18463 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
18464 add_data_member_location_attribute (die, binfo);
18466 if (BINFO_VIRTUAL_P (binfo))
18467 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
18469 /* In DWARF3+ the default is DW_ACCESS_private only in DW_TAG_class_type
18470 children, otherwise the default is DW_ACCESS_public. In DWARF2
18471 the default has always been DW_ACCESS_private. */
18472 if (access == access_public_node)
18474 if (dwarf_version == 2
18475 || context_die->die_tag == DW_TAG_class_type)
18476 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
18478 else if (access == access_protected_node)
18479 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
18480 else if (dwarf_version > 2
18481 && context_die->die_tag != DW_TAG_class_type)
18482 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_private);
18485 /* Generate a DIE for a class member. */
18488 gen_member_die (tree type, dw_die_ref context_die)
18491 tree binfo = TYPE_BINFO (type);
18494 /* If this is not an incomplete type, output descriptions of each of its
18495 members. Note that as we output the DIEs necessary to represent the
18496 members of this record or union type, we will also be trying to output
18497 DIEs to represent the *types* of those members. However the `type'
18498 function (above) will specifically avoid generating type DIEs for member
18499 types *within* the list of member DIEs for this (containing) type except
18500 for those types (of members) which are explicitly marked as also being
18501 members of this (containing) type themselves. The g++ front- end can
18502 force any given type to be treated as a member of some other (containing)
18503 type by setting the TYPE_CONTEXT of the given (member) type to point to
18504 the TREE node representing the appropriate (containing) type. */
18506 /* First output info about the base classes. */
18509 VEC(tree,gc) *accesses = BINFO_BASE_ACCESSES (binfo);
18513 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base); i++)
18514 gen_inheritance_die (base,
18515 (accesses ? VEC_index (tree, accesses, i)
18516 : access_public_node), context_die);
18519 /* Now output info about the data members and type members. */
18520 for (member = TYPE_FIELDS (type); member; member = DECL_CHAIN (member))
18522 /* If we thought we were generating minimal debug info for TYPE
18523 and then changed our minds, some of the member declarations
18524 may have already been defined. Don't define them again, but
18525 do put them in the right order. */
18527 child = lookup_decl_die (member);
18529 splice_child_die (context_die, child);
18531 gen_decl_die (member, NULL, context_die);
18534 /* Now output info about the function members (if any). */
18535 for (member = TYPE_METHODS (type); member; member = DECL_CHAIN (member))
18537 /* Don't include clones in the member list. */
18538 if (DECL_ABSTRACT_ORIGIN (member))
18541 child = lookup_decl_die (member);
18543 splice_child_die (context_die, child);
18545 gen_decl_die (member, NULL, context_die);
18549 /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG
18550 is set, we pretend that the type was never defined, so we only get the
18551 member DIEs needed by later specification DIEs. */
18554 gen_struct_or_union_type_die (tree type, dw_die_ref context_die,
18555 enum debug_info_usage usage)
18557 dw_die_ref type_die = lookup_type_die (type);
18558 dw_die_ref scope_die = 0;
18560 int complete = (TYPE_SIZE (type)
18561 && (! TYPE_STUB_DECL (type)
18562 || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))));
18563 int ns_decl = (context_die && context_die->die_tag == DW_TAG_namespace);
18564 complete = complete && should_emit_struct_debug (type, usage);
18566 if (type_die && ! complete)
18569 if (TYPE_CONTEXT (type) != NULL_TREE
18570 && (AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
18571 || TREE_CODE (TYPE_CONTEXT (type)) == NAMESPACE_DECL))
18574 scope_die = scope_die_for (type, context_die);
18576 if (! type_die || (nested && is_cu_die (scope_die)))
18577 /* First occurrence of type or toplevel definition of nested class. */
18579 dw_die_ref old_die = type_die;
18581 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
18582 ? record_type_tag (type) : DW_TAG_union_type,
18584 equate_type_number_to_die (type, type_die);
18586 add_AT_specification (type_die, old_die);
18589 add_name_attribute (type_die, type_tag (type));
18590 add_gnat_descriptive_type_attribute (type_die, type, context_die);
18591 if (TYPE_ARTIFICIAL (type))
18592 add_AT_flag (type_die, DW_AT_artificial, 1);
18596 remove_AT (type_die, DW_AT_declaration);
18598 /* Generate child dies for template paramaters. */
18599 if (debug_info_level > DINFO_LEVEL_TERSE
18600 && COMPLETE_TYPE_P (type))
18601 schedule_generic_params_dies_gen (type);
18603 /* If this type has been completed, then give it a byte_size attribute and
18604 then give a list of members. */
18605 if (complete && !ns_decl)
18607 /* Prevent infinite recursion in cases where the type of some member of
18608 this type is expressed in terms of this type itself. */
18609 TREE_ASM_WRITTEN (type) = 1;
18610 add_byte_size_attribute (type_die, type);
18611 if (TYPE_STUB_DECL (type) != NULL_TREE)
18613 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
18614 add_accessibility_attribute (type_die, TYPE_STUB_DECL (type));
18617 /* If the first reference to this type was as the return type of an
18618 inline function, then it may not have a parent. Fix this now. */
18619 if (type_die->die_parent == NULL)
18620 add_child_die (scope_die, type_die);
18622 push_decl_scope (type);
18623 gen_member_die (type, type_die);
18626 /* GNU extension: Record what type our vtable lives in. */
18627 if (TYPE_VFIELD (type))
18629 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
18631 gen_type_die (vtype, context_die);
18632 add_AT_die_ref (type_die, DW_AT_containing_type,
18633 lookup_type_die (vtype));
18638 add_AT_flag (type_die, DW_AT_declaration, 1);
18640 /* We don't need to do this for function-local types. */
18641 if (TYPE_STUB_DECL (type)
18642 && ! decl_function_context (TYPE_STUB_DECL (type)))
18643 VEC_safe_push (tree, gc, incomplete_types, type);
18646 if (get_AT (type_die, DW_AT_name))
18647 add_pubtype (type, type_die);
18650 /* Generate a DIE for a subroutine _type_. */
18653 gen_subroutine_type_die (tree type, dw_die_ref context_die)
18655 tree return_type = TREE_TYPE (type);
18656 dw_die_ref subr_die
18657 = new_die (DW_TAG_subroutine_type,
18658 scope_die_for (type, context_die), type);
18660 equate_type_number_to_die (type, subr_die);
18661 add_prototyped_attribute (subr_die, type);
18662 add_type_attribute (subr_die, return_type, 0, 0, context_die);
18663 gen_formal_types_die (type, subr_die);
18665 if (get_AT (subr_die, DW_AT_name))
18666 add_pubtype (type, subr_die);
18669 /* Generate a DIE for a type definition. */
18672 gen_typedef_die (tree decl, dw_die_ref context_die)
18674 dw_die_ref type_die;
18677 if (TREE_ASM_WRITTEN (decl))
18680 TREE_ASM_WRITTEN (decl) = 1;
18681 type_die = new_die (DW_TAG_typedef, context_die, decl);
18682 origin = decl_ultimate_origin (decl);
18683 if (origin != NULL)
18684 add_abstract_origin_attribute (type_die, origin);
18689 add_name_and_src_coords_attributes (type_die, decl);
18690 if (DECL_ORIGINAL_TYPE (decl))
18692 type = DECL_ORIGINAL_TYPE (decl);
18694 gcc_assert (type != TREE_TYPE (decl));
18695 equate_type_number_to_die (TREE_TYPE (decl), type_die);
18699 type = TREE_TYPE (decl);
18701 if (is_naming_typedef_decl (TYPE_NAME (type)))
18703 /* Here, we are in the case of decl being a typedef naming
18704 an anonymous type, e.g:
18705 typedef struct {...} foo;
18706 In that case TREE_TYPE (decl) is not a typedef variant
18707 type and TYPE_NAME of the anonymous type is set to the
18708 TYPE_DECL of the typedef. This construct is emitted by
18711 TYPE is the anonymous struct named by the typedef
18712 DECL. As we need the DW_AT_type attribute of the
18713 DW_TAG_typedef to point to the DIE of TYPE, let's
18714 generate that DIE right away. add_type_attribute
18715 called below will then pick (via lookup_type_die) that
18716 anonymous struct DIE. */
18717 if (!TREE_ASM_WRITTEN (type))
18718 gen_tagged_type_die (type, context_die, DINFO_USAGE_DIR_USE);
18720 /* This is a GNU Extension. We are adding a
18721 DW_AT_linkage_name attribute to the DIE of the
18722 anonymous struct TYPE. The value of that attribute
18723 is the name of the typedef decl naming the anonymous
18724 struct. This greatly eases the work of consumers of
18725 this debug info. */
18726 add_linkage_attr (lookup_type_die (type), decl);
18730 add_type_attribute (type_die, type, TREE_READONLY (decl),
18731 TREE_THIS_VOLATILE (decl), context_die);
18733 if (is_naming_typedef_decl (decl))
18734 /* We want that all subsequent calls to lookup_type_die with
18735 TYPE in argument yield the DW_TAG_typedef we have just
18737 equate_type_number_to_die (type, type_die);
18739 add_accessibility_attribute (type_die, decl);
18742 if (DECL_ABSTRACT (decl))
18743 equate_decl_number_to_die (decl, type_die);
18745 if (get_AT (type_die, DW_AT_name))
18746 add_pubtype (decl, type_die);
18749 /* Generate a DIE for a struct, class, enum or union type. */
18752 gen_tagged_type_die (tree type,
18753 dw_die_ref context_die,
18754 enum debug_info_usage usage)
18758 if (type == NULL_TREE
18759 || !is_tagged_type (type))
18762 /* If this is a nested type whose containing class hasn't been written
18763 out yet, writing it out will cover this one, too. This does not apply
18764 to instantiations of member class templates; they need to be added to
18765 the containing class as they are generated. FIXME: This hurts the
18766 idea of combining type decls from multiple TUs, since we can't predict
18767 what set of template instantiations we'll get. */
18768 if (TYPE_CONTEXT (type)
18769 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
18770 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
18772 gen_type_die_with_usage (TYPE_CONTEXT (type), context_die, usage);
18774 if (TREE_ASM_WRITTEN (type))
18777 /* If that failed, attach ourselves to the stub. */
18778 push_decl_scope (TYPE_CONTEXT (type));
18779 context_die = lookup_type_die (TYPE_CONTEXT (type));
18782 else if (TYPE_CONTEXT (type) != NULL_TREE
18783 && (TREE_CODE (TYPE_CONTEXT (type)) == FUNCTION_DECL))
18785 /* If this type is local to a function that hasn't been written
18786 out yet, use a NULL context for now; it will be fixed up in
18787 decls_for_scope. */
18788 context_die = lookup_decl_die (TYPE_CONTEXT (type));
18789 /* A declaration DIE doesn't count; nested types need to go in the
18791 if (context_die && is_declaration_die (context_die))
18792 context_die = NULL;
18797 context_die = declare_in_namespace (type, context_die);
18801 if (TREE_CODE (type) == ENUMERAL_TYPE)
18803 /* This might have been written out by the call to
18804 declare_in_namespace. */
18805 if (!TREE_ASM_WRITTEN (type))
18806 gen_enumeration_type_die (type, context_die);
18809 gen_struct_or_union_type_die (type, context_die, usage);
18814 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
18815 it up if it is ever completed. gen_*_type_die will set it for us
18816 when appropriate. */
18819 /* Generate a type description DIE. */
18822 gen_type_die_with_usage (tree type, dw_die_ref context_die,
18823 enum debug_info_usage usage)
18825 struct array_descr_info info;
18827 if (type == NULL_TREE || type == error_mark_node)
18830 if (TYPE_NAME (type) != NULL_TREE
18831 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
18832 && is_redundant_typedef (TYPE_NAME (type))
18833 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
18834 /* The DECL of this type is a typedef we don't want to emit debug
18835 info for but we want debug info for its underlying typedef.
18836 This can happen for e.g, the injected-class-name of a C++
18838 type = DECL_ORIGINAL_TYPE (TYPE_NAME (type));
18840 /* If TYPE is a typedef type variant, let's generate debug info
18841 for the parent typedef which TYPE is a type of. */
18842 if (typedef_variant_p (type))
18844 if (TREE_ASM_WRITTEN (type))
18847 /* Prevent broken recursion; we can't hand off to the same type. */
18848 gcc_assert (DECL_ORIGINAL_TYPE (TYPE_NAME (type)) != type);
18850 /* Use the DIE of the containing namespace as the parent DIE of
18851 the type description DIE we want to generate. */
18852 if (DECL_FILE_SCOPE_P (TYPE_NAME (type))
18853 || (DECL_CONTEXT (TYPE_NAME (type))
18854 && TREE_CODE (DECL_CONTEXT (TYPE_NAME (type))) == NAMESPACE_DECL))
18855 context_die = get_context_die (DECL_CONTEXT (TYPE_NAME (type)));
18857 TREE_ASM_WRITTEN (type) = 1;
18859 gen_decl_die (TYPE_NAME (type), NULL, context_die);
18863 /* If type is an anonymous tagged type named by a typedef, let's
18864 generate debug info for the typedef. */
18865 if (is_naming_typedef_decl (TYPE_NAME (type)))
18867 /* Use the DIE of the containing namespace as the parent DIE of
18868 the type description DIE we want to generate. */
18869 if (DECL_CONTEXT (TYPE_NAME (type))
18870 && TREE_CODE (DECL_CONTEXT (TYPE_NAME (type))) == NAMESPACE_DECL)
18871 context_die = get_context_die (DECL_CONTEXT (TYPE_NAME (type)));
18873 gen_decl_die (TYPE_NAME (type), NULL, context_die);
18877 /* If this is an array type with hidden descriptor, handle it first. */
18878 if (!TREE_ASM_WRITTEN (type)
18879 && lang_hooks.types.get_array_descr_info
18880 && lang_hooks.types.get_array_descr_info (type, &info)
18881 && (dwarf_version >= 3 || !dwarf_strict))
18883 gen_descr_array_type_die (type, &info, context_die);
18884 TREE_ASM_WRITTEN (type) = 1;
18888 /* We are going to output a DIE to represent the unqualified version
18889 of this type (i.e. without any const or volatile qualifiers) so
18890 get the main variant (i.e. the unqualified version) of this type
18891 now. (Vectors are special because the debugging info is in the
18892 cloned type itself). */
18893 if (TREE_CODE (type) != VECTOR_TYPE)
18894 type = type_main_variant (type);
18896 if (TREE_ASM_WRITTEN (type))
18899 switch (TREE_CODE (type))
18905 case REFERENCE_TYPE:
18906 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
18907 ensures that the gen_type_die recursion will terminate even if the
18908 type is recursive. Recursive types are possible in Ada. */
18909 /* ??? We could perhaps do this for all types before the switch
18911 TREE_ASM_WRITTEN (type) = 1;
18913 /* For these types, all that is required is that we output a DIE (or a
18914 set of DIEs) to represent the "basis" type. */
18915 gen_type_die_with_usage (TREE_TYPE (type), context_die,
18916 DINFO_USAGE_IND_USE);
18920 /* This code is used for C++ pointer-to-data-member types.
18921 Output a description of the relevant class type. */
18922 gen_type_die_with_usage (TYPE_OFFSET_BASETYPE (type), context_die,
18923 DINFO_USAGE_IND_USE);
18925 /* Output a description of the type of the object pointed to. */
18926 gen_type_die_with_usage (TREE_TYPE (type), context_die,
18927 DINFO_USAGE_IND_USE);
18929 /* Now output a DIE to represent this pointer-to-data-member type
18931 gen_ptr_to_mbr_type_die (type, context_die);
18934 case FUNCTION_TYPE:
18935 /* Force out return type (in case it wasn't forced out already). */
18936 gen_type_die_with_usage (TREE_TYPE (type), context_die,
18937 DINFO_USAGE_DIR_USE);
18938 gen_subroutine_type_die (type, context_die);
18942 /* Force out return type (in case it wasn't forced out already). */
18943 gen_type_die_with_usage (TREE_TYPE (type), context_die,
18944 DINFO_USAGE_DIR_USE);
18945 gen_subroutine_type_die (type, context_die);
18949 gen_array_type_die (type, context_die);
18953 gen_array_type_die (type, context_die);
18956 case ENUMERAL_TYPE:
18959 case QUAL_UNION_TYPE:
18960 gen_tagged_type_die (type, context_die, usage);
18966 case FIXED_POINT_TYPE:
18969 /* No DIEs needed for fundamental types. */
18974 /* Just use DW_TAG_unspecified_type. */
18976 dw_die_ref type_die = lookup_type_die (type);
18977 if (type_die == NULL)
18979 tree name = TYPE_NAME (type);
18980 if (TREE_CODE (name) == TYPE_DECL)
18981 name = DECL_NAME (name);
18982 type_die = new_die (DW_TAG_unspecified_type, comp_unit_die (), type);
18983 add_name_attribute (type_die, IDENTIFIER_POINTER (name));
18984 equate_type_number_to_die (type, type_die);
18990 gcc_unreachable ();
18993 TREE_ASM_WRITTEN (type) = 1;
18997 gen_type_die (tree type, dw_die_ref context_die)
18999 gen_type_die_with_usage (type, context_die, DINFO_USAGE_DIR_USE);
19002 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
19003 things which are local to the given block. */
19006 gen_block_die (tree stmt, dw_die_ref context_die, int depth)
19008 int must_output_die = 0;
19011 /* Ignore blocks that are NULL. */
19012 if (stmt == NULL_TREE)
19015 inlined_func = inlined_function_outer_scope_p (stmt);
19017 /* If the block is one fragment of a non-contiguous block, do not
19018 process the variables, since they will have been done by the
19019 origin block. Do process subblocks. */
19020 if (BLOCK_FRAGMENT_ORIGIN (stmt))
19024 for (sub = BLOCK_SUBBLOCKS (stmt); sub; sub = BLOCK_CHAIN (sub))
19025 gen_block_die (sub, context_die, depth + 1);
19030 /* Determine if we need to output any Dwarf DIEs at all to represent this
19033 /* The outer scopes for inlinings *must* always be represented. We
19034 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
19035 must_output_die = 1;
19038 /* Determine if this block directly contains any "significant"
19039 local declarations which we will need to output DIEs for. */
19040 if (debug_info_level > DINFO_LEVEL_TERSE)
19041 /* We are not in terse mode so *any* local declaration counts
19042 as being a "significant" one. */
19043 must_output_die = ((BLOCK_VARS (stmt) != NULL
19044 || BLOCK_NUM_NONLOCALIZED_VARS (stmt))
19045 && (TREE_USED (stmt)
19046 || TREE_ASM_WRITTEN (stmt)
19047 || BLOCK_ABSTRACT (stmt)));
19048 else if ((TREE_USED (stmt)
19049 || TREE_ASM_WRITTEN (stmt)
19050 || BLOCK_ABSTRACT (stmt))
19051 && !dwarf2out_ignore_block (stmt))
19052 must_output_die = 1;
19055 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
19056 DIE for any block which contains no significant local declarations at
19057 all. Rather, in such cases we just call `decls_for_scope' so that any
19058 needed Dwarf info for any sub-blocks will get properly generated. Note
19059 that in terse mode, our definition of what constitutes a "significant"
19060 local declaration gets restricted to include only inlined function
19061 instances and local (nested) function definitions. */
19062 if (must_output_die)
19066 /* If STMT block is abstract, that means we have been called
19067 indirectly from dwarf2out_abstract_function.
19068 That function rightfully marks the descendent blocks (of
19069 the abstract function it is dealing with) as being abstract,
19070 precisely to prevent us from emitting any
19071 DW_TAG_inlined_subroutine DIE as a descendent
19072 of an abstract function instance. So in that case, we should
19073 not call gen_inlined_subroutine_die.
19075 Later though, when cgraph asks dwarf2out to emit info
19076 for the concrete instance of the function decl into which
19077 the concrete instance of STMT got inlined, the later will lead
19078 to the generation of a DW_TAG_inlined_subroutine DIE. */
19079 if (! BLOCK_ABSTRACT (stmt))
19080 gen_inlined_subroutine_die (stmt, context_die, depth);
19083 gen_lexical_block_die (stmt, context_die, depth);
19086 decls_for_scope (stmt, context_die, depth);
19089 /* Process variable DECL (or variable with origin ORIGIN) within
19090 block STMT and add it to CONTEXT_DIE. */
19092 process_scope_var (tree stmt, tree decl, tree origin, dw_die_ref context_die)
19095 tree decl_or_origin = decl ? decl : origin;
19097 if (TREE_CODE (decl_or_origin) == FUNCTION_DECL)
19098 die = lookup_decl_die (decl_or_origin);
19099 else if (TREE_CODE (decl_or_origin) == TYPE_DECL
19100 && TYPE_DECL_IS_STUB (decl_or_origin))
19101 die = lookup_type_die (TREE_TYPE (decl_or_origin));
19105 if (die != NULL && die->die_parent == NULL)
19106 add_child_die (context_die, die);
19107 else if (TREE_CODE (decl_or_origin) == IMPORTED_DECL)
19108 dwarf2out_imported_module_or_decl_1 (decl_or_origin, DECL_NAME (decl_or_origin),
19109 stmt, context_die);
19111 gen_decl_die (decl, origin, context_die);
19114 /* Generate all of the decls declared within a given scope and (recursively)
19115 all of its sub-blocks. */
19118 decls_for_scope (tree stmt, dw_die_ref context_die, int depth)
19124 /* Ignore NULL blocks. */
19125 if (stmt == NULL_TREE)
19128 /* Output the DIEs to represent all of the data objects and typedefs
19129 declared directly within this block but not within any nested
19130 sub-blocks. Also, nested function and tag DIEs have been
19131 generated with a parent of NULL; fix that up now. */
19132 for (decl = BLOCK_VARS (stmt); decl != NULL; decl = DECL_CHAIN (decl))
19133 process_scope_var (stmt, decl, NULL_TREE, context_die);
19134 for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (stmt); i++)
19135 process_scope_var (stmt, NULL, BLOCK_NONLOCALIZED_VAR (stmt, i),
19138 /* If we're at -g1, we're not interested in subblocks. */
19139 if (debug_info_level <= DINFO_LEVEL_TERSE)
19142 /* Output the DIEs to represent all sub-blocks (and the items declared
19143 therein) of this block. */
19144 for (subblocks = BLOCK_SUBBLOCKS (stmt);
19146 subblocks = BLOCK_CHAIN (subblocks))
19147 gen_block_die (subblocks, context_die, depth + 1);
19150 /* Is this a typedef we can avoid emitting? */
19153 is_redundant_typedef (const_tree decl)
19155 if (TYPE_DECL_IS_STUB (decl))
19158 if (DECL_ARTIFICIAL (decl)
19159 && DECL_CONTEXT (decl)
19160 && is_tagged_type (DECL_CONTEXT (decl))
19161 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
19162 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
19163 /* Also ignore the artificial member typedef for the class name. */
19169 /* Return TRUE if TYPE is a typedef that names a type for linkage
19170 purposes. This kind of typedefs is produced by the C++ FE for
19173 typedef struct {...} foo;
19175 In that case, there is no typedef variant type produced for foo.
19176 Rather, the TREE_TYPE of the TYPE_DECL of foo is the anonymous
19180 is_naming_typedef_decl (const_tree decl)
19182 if (decl == NULL_TREE
19183 || TREE_CODE (decl) != TYPE_DECL
19184 || !is_tagged_type (TREE_TYPE (decl))
19185 || DECL_IS_BUILTIN (decl)
19186 || is_redundant_typedef (decl)
19187 /* It looks like Ada produces TYPE_DECLs that are very similar
19188 to C++ naming typedefs but that have different
19189 semantics. Let's be specific to c++ for now. */
19193 return (DECL_ORIGINAL_TYPE (decl) == NULL_TREE
19194 && TYPE_NAME (TREE_TYPE (decl)) == decl
19195 && (TYPE_STUB_DECL (TREE_TYPE (decl))
19196 != TYPE_NAME (TREE_TYPE (decl))));
19199 /* Returns the DIE for a context. */
19201 static inline dw_die_ref
19202 get_context_die (tree context)
19206 /* Find die that represents this context. */
19207 if (TYPE_P (context))
19209 context = TYPE_MAIN_VARIANT (context);
19210 return strip_naming_typedef (context, force_type_die (context));
19213 return force_decl_die (context);
19215 return comp_unit_die ();
19218 /* Returns the DIE for decl. A DIE will always be returned. */
19221 force_decl_die (tree decl)
19223 dw_die_ref decl_die;
19224 unsigned saved_external_flag;
19225 tree save_fn = NULL_TREE;
19226 decl_die = lookup_decl_die (decl);
19229 dw_die_ref context_die = get_context_die (DECL_CONTEXT (decl));
19231 decl_die = lookup_decl_die (decl);
19235 switch (TREE_CODE (decl))
19237 case FUNCTION_DECL:
19238 /* Clear current_function_decl, so that gen_subprogram_die thinks
19239 that this is a declaration. At this point, we just want to force
19240 declaration die. */
19241 save_fn = current_function_decl;
19242 current_function_decl = NULL_TREE;
19243 gen_subprogram_die (decl, context_die);
19244 current_function_decl = save_fn;
19248 /* Set external flag to force declaration die. Restore it after
19249 gen_decl_die() call. */
19250 saved_external_flag = DECL_EXTERNAL (decl);
19251 DECL_EXTERNAL (decl) = 1;
19252 gen_decl_die (decl, NULL, context_die);
19253 DECL_EXTERNAL (decl) = saved_external_flag;
19256 case NAMESPACE_DECL:
19257 if (dwarf_version >= 3 || !dwarf_strict)
19258 dwarf2out_decl (decl);
19260 /* DWARF2 has neither DW_TAG_module, nor DW_TAG_namespace. */
19261 decl_die = comp_unit_die ();
19264 case TRANSLATION_UNIT_DECL:
19265 decl_die = comp_unit_die ();
19269 gcc_unreachable ();
19272 /* We should be able to find the DIE now. */
19274 decl_die = lookup_decl_die (decl);
19275 gcc_assert (decl_die);
19281 /* Returns the DIE for TYPE, that must not be a base type. A DIE is
19282 always returned. */
19285 force_type_die (tree type)
19287 dw_die_ref type_die;
19289 type_die = lookup_type_die (type);
19292 dw_die_ref context_die = get_context_die (TYPE_CONTEXT (type));
19294 type_die = modified_type_die (type, TYPE_READONLY (type),
19295 TYPE_VOLATILE (type), context_die);
19296 gcc_assert (type_die);
19301 /* Force out any required namespaces to be able to output DECL,
19302 and return the new context_die for it, if it's changed. */
19305 setup_namespace_context (tree thing, dw_die_ref context_die)
19307 tree context = (DECL_P (thing)
19308 ? DECL_CONTEXT (thing) : TYPE_CONTEXT (thing));
19309 if (context && TREE_CODE (context) == NAMESPACE_DECL)
19310 /* Force out the namespace. */
19311 context_die = force_decl_die (context);
19313 return context_die;
19316 /* Emit a declaration DIE for THING (which is either a DECL or a tagged
19317 type) within its namespace, if appropriate.
19319 For compatibility with older debuggers, namespace DIEs only contain
19320 declarations; all definitions are emitted at CU scope. */
19323 declare_in_namespace (tree thing, dw_die_ref context_die)
19325 dw_die_ref ns_context;
19327 if (debug_info_level <= DINFO_LEVEL_TERSE)
19328 return context_die;
19330 /* If this decl is from an inlined function, then don't try to emit it in its
19331 namespace, as we will get confused. It would have already been emitted
19332 when the abstract instance of the inline function was emitted anyways. */
19333 if (DECL_P (thing) && DECL_ABSTRACT_ORIGIN (thing))
19334 return context_die;
19336 ns_context = setup_namespace_context (thing, context_die);
19338 if (ns_context != context_die)
19342 if (DECL_P (thing))
19343 gen_decl_die (thing, NULL, ns_context);
19345 gen_type_die (thing, ns_context);
19347 return context_die;
19350 /* Generate a DIE for a namespace or namespace alias. */
19353 gen_namespace_die (tree decl, dw_die_ref context_die)
19355 dw_die_ref namespace_die;
19357 /* Namespace aliases have a DECL_ABSTRACT_ORIGIN of the namespace
19358 they are an alias of. */
19359 if (DECL_ABSTRACT_ORIGIN (decl) == NULL)
19361 /* Output a real namespace or module. */
19362 context_die = setup_namespace_context (decl, comp_unit_die ());
19363 namespace_die = new_die (is_fortran ()
19364 ? DW_TAG_module : DW_TAG_namespace,
19365 context_die, decl);
19366 /* For Fortran modules defined in different CU don't add src coords. */
19367 if (namespace_die->die_tag == DW_TAG_module && DECL_EXTERNAL (decl))
19369 const char *name = dwarf2_name (decl, 0);
19371 add_name_attribute (namespace_die, name);
19374 add_name_and_src_coords_attributes (namespace_die, decl);
19375 if (DECL_EXTERNAL (decl))
19376 add_AT_flag (namespace_die, DW_AT_declaration, 1);
19377 equate_decl_number_to_die (decl, namespace_die);
19381 /* Output a namespace alias. */
19383 /* Force out the namespace we are an alias of, if necessary. */
19384 dw_die_ref origin_die
19385 = force_decl_die (DECL_ABSTRACT_ORIGIN (decl));
19387 if (DECL_FILE_SCOPE_P (decl)
19388 || TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL)
19389 context_die = setup_namespace_context (decl, comp_unit_die ());
19390 /* Now create the namespace alias DIE. */
19391 namespace_die = new_die (DW_TAG_imported_declaration, context_die, decl);
19392 add_name_and_src_coords_attributes (namespace_die, decl);
19393 add_AT_die_ref (namespace_die, DW_AT_import, origin_die);
19394 equate_decl_number_to_die (decl, namespace_die);
19398 /* Generate Dwarf debug information for a decl described by DECL.
19399 The return value is currently only meaningful for PARM_DECLs,
19400 for all other decls it returns NULL. */
19403 gen_decl_die (tree decl, tree origin, dw_die_ref context_die)
19405 tree decl_or_origin = decl ? decl : origin;
19406 tree class_origin = NULL, ultimate_origin;
19408 if (DECL_P (decl_or_origin) && DECL_IGNORED_P (decl_or_origin))
19411 switch (TREE_CODE (decl_or_origin))
19417 if (!is_fortran () && !is_ada ())
19419 /* The individual enumerators of an enum type get output when we output
19420 the Dwarf representation of the relevant enum type itself. */
19424 /* Emit its type. */
19425 gen_type_die (TREE_TYPE (decl), context_die);
19427 /* And its containing namespace. */
19428 context_die = declare_in_namespace (decl, context_die);
19430 gen_const_die (decl, context_die);
19433 case FUNCTION_DECL:
19434 /* Don't output any DIEs to represent mere function declarations,
19435 unless they are class members or explicit block externs. */
19436 if (DECL_INITIAL (decl_or_origin) == NULL_TREE
19437 && DECL_FILE_SCOPE_P (decl_or_origin)
19438 && (current_function_decl == NULL_TREE
19439 || DECL_ARTIFICIAL (decl_or_origin)))
19444 /* This doesn't work because the C frontend sets DECL_ABSTRACT_ORIGIN
19445 on local redeclarations of global functions. That seems broken. */
19446 if (current_function_decl != decl)
19447 /* This is only a declaration. */;
19450 /* If we're emitting a clone, emit info for the abstract instance. */
19451 if (origin || DECL_ORIGIN (decl) != decl)
19452 dwarf2out_abstract_function (origin
19453 ? DECL_ORIGIN (origin)
19454 : DECL_ABSTRACT_ORIGIN (decl));
19456 /* If we're emitting an out-of-line copy of an inline function,
19457 emit info for the abstract instance and set up to refer to it. */
19458 else if (cgraph_function_possibly_inlined_p (decl)
19459 && ! DECL_ABSTRACT (decl)
19460 && ! class_or_namespace_scope_p (context_die)
19461 /* dwarf2out_abstract_function won't emit a die if this is just
19462 a declaration. We must avoid setting DECL_ABSTRACT_ORIGIN in
19463 that case, because that works only if we have a die. */
19464 && DECL_INITIAL (decl) != NULL_TREE)
19466 dwarf2out_abstract_function (decl);
19467 set_decl_origin_self (decl);
19470 /* Otherwise we're emitting the primary DIE for this decl. */
19471 else if (debug_info_level > DINFO_LEVEL_TERSE)
19473 /* Before we describe the FUNCTION_DECL itself, make sure that we
19474 have its containing type. */
19476 origin = decl_class_context (decl);
19477 if (origin != NULL_TREE)
19478 gen_type_die (origin, context_die);
19480 /* And its return type. */
19481 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
19483 /* And its virtual context. */
19484 if (DECL_VINDEX (decl) != NULL_TREE)
19485 gen_type_die (DECL_CONTEXT (decl), context_die);
19487 /* Make sure we have a member DIE for decl. */
19488 if (origin != NULL_TREE)
19489 gen_type_die_for_member (origin, decl, context_die);
19491 /* And its containing namespace. */
19492 context_die = declare_in_namespace (decl, context_die);
19495 /* Now output a DIE to represent the function itself. */
19497 gen_subprogram_die (decl, context_die);
19501 /* If we are in terse mode, don't generate any DIEs to represent any
19502 actual typedefs. */
19503 if (debug_info_level <= DINFO_LEVEL_TERSE)
19506 /* In the special case of a TYPE_DECL node representing the declaration
19507 of some type tag, if the given TYPE_DECL is marked as having been
19508 instantiated from some other (original) TYPE_DECL node (e.g. one which
19509 was generated within the original definition of an inline function) we
19510 used to generate a special (abbreviated) DW_TAG_structure_type,
19511 DW_TAG_union_type, or DW_TAG_enumeration_type DIE here. But nothing
19512 should be actually referencing those DIEs, as variable DIEs with that
19513 type would be emitted already in the abstract origin, so it was always
19514 removed during unused type prunning. Don't add anything in this
19516 if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE)
19519 if (is_redundant_typedef (decl))
19520 gen_type_die (TREE_TYPE (decl), context_die);
19522 /* Output a DIE to represent the typedef itself. */
19523 gen_typedef_die (decl, context_die);
19527 if (debug_info_level >= DINFO_LEVEL_NORMAL)
19528 gen_label_die (decl, context_die);
19533 /* If we are in terse mode, don't generate any DIEs to represent any
19534 variable declarations or definitions. */
19535 if (debug_info_level <= DINFO_LEVEL_TERSE)
19538 /* Output any DIEs that are needed to specify the type of this data
19540 if (decl_by_reference_p (decl_or_origin))
19541 gen_type_die (TREE_TYPE (TREE_TYPE (decl_or_origin)), context_die);
19543 gen_type_die (TREE_TYPE (decl_or_origin), context_die);
19545 /* And its containing type. */
19546 class_origin = decl_class_context (decl_or_origin);
19547 if (class_origin != NULL_TREE)
19548 gen_type_die_for_member (class_origin, decl_or_origin, context_die);
19550 /* And its containing namespace. */
19551 context_die = declare_in_namespace (decl_or_origin, context_die);
19553 /* Now output the DIE to represent the data object itself. This gets
19554 complicated because of the possibility that the VAR_DECL really
19555 represents an inlined instance of a formal parameter for an inline
19557 ultimate_origin = decl_ultimate_origin (decl_or_origin);
19558 if (ultimate_origin != NULL_TREE
19559 && TREE_CODE (ultimate_origin) == PARM_DECL)
19560 gen_formal_parameter_die (decl, origin,
19561 true /* Emit name attribute. */,
19564 gen_variable_die (decl, origin, context_die);
19568 /* Ignore the nameless fields that are used to skip bits but handle C++
19569 anonymous unions and structs. */
19570 if (DECL_NAME (decl) != NULL_TREE
19571 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE
19572 || TREE_CODE (TREE_TYPE (decl)) == RECORD_TYPE)
19574 gen_type_die (member_declared_type (decl), context_die);
19575 gen_field_die (decl, context_die);
19580 if (DECL_BY_REFERENCE (decl_or_origin))
19581 gen_type_die (TREE_TYPE (TREE_TYPE (decl_or_origin)), context_die);
19583 gen_type_die (TREE_TYPE (decl_or_origin), context_die);
19584 return gen_formal_parameter_die (decl, origin,
19585 true /* Emit name attribute. */,
19588 case NAMESPACE_DECL:
19589 case IMPORTED_DECL:
19590 if (dwarf_version >= 3 || !dwarf_strict)
19591 gen_namespace_die (decl, context_die);
19595 /* Probably some frontend-internal decl. Assume we don't care. */
19596 gcc_assert ((int)TREE_CODE (decl) > NUM_TREE_CODES);
19603 /* Output debug information for global decl DECL. Called from toplev.c after
19604 compilation proper has finished. */
19607 dwarf2out_global_decl (tree decl)
19609 /* Output DWARF2 information for file-scope tentative data object
19610 declarations, file-scope (extern) function declarations (which
19611 had no corresponding body) and file-scope tagged type declarations
19612 and definitions which have not yet been forced out. */
19613 if (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl))
19614 dwarf2out_decl (decl);
19617 /* Output debug information for type decl DECL. Called from toplev.c
19618 and from language front ends (to record built-in types). */
19620 dwarf2out_type_decl (tree decl, int local)
19623 dwarf2out_decl (decl);
19626 /* Output debug information for imported module or decl DECL.
19627 NAME is non-NULL name in the lexical block if the decl has been renamed.
19628 LEXICAL_BLOCK is the lexical block (which TREE_CODE is a BLOCK)
19629 that DECL belongs to.
19630 LEXICAL_BLOCK_DIE is the DIE of LEXICAL_BLOCK. */
19632 dwarf2out_imported_module_or_decl_1 (tree decl,
19634 tree lexical_block,
19635 dw_die_ref lexical_block_die)
19637 expanded_location xloc;
19638 dw_die_ref imported_die = NULL;
19639 dw_die_ref at_import_die;
19641 if (TREE_CODE (decl) == IMPORTED_DECL)
19643 xloc = expand_location (DECL_SOURCE_LOCATION (decl));
19644 decl = IMPORTED_DECL_ASSOCIATED_DECL (decl);
19648 xloc = expand_location (input_location);
19650 if (TREE_CODE (decl) == TYPE_DECL || TREE_CODE (decl) == CONST_DECL)
19652 at_import_die = force_type_die (TREE_TYPE (decl));
19653 /* For namespace N { typedef void T; } using N::T; base_type_die
19654 returns NULL, but DW_TAG_imported_declaration requires
19655 the DW_AT_import tag. Force creation of DW_TAG_typedef. */
19656 if (!at_import_die)
19658 gcc_assert (TREE_CODE (decl) == TYPE_DECL);
19659 gen_typedef_die (decl, get_context_die (DECL_CONTEXT (decl)));
19660 at_import_die = lookup_type_die (TREE_TYPE (decl));
19661 gcc_assert (at_import_die);
19666 at_import_die = lookup_decl_die (decl);
19667 if (!at_import_die)
19669 /* If we're trying to avoid duplicate debug info, we may not have
19670 emitted the member decl for this field. Emit it now. */
19671 if (TREE_CODE (decl) == FIELD_DECL)
19673 tree type = DECL_CONTEXT (decl);
19675 if (TYPE_CONTEXT (type)
19676 && TYPE_P (TYPE_CONTEXT (type))
19677 && !should_emit_struct_debug (TYPE_CONTEXT (type),
19678 DINFO_USAGE_DIR_USE))
19680 gen_type_die_for_member (type, decl,
19681 get_context_die (TYPE_CONTEXT (type)));
19683 at_import_die = force_decl_die (decl);
19687 if (TREE_CODE (decl) == NAMESPACE_DECL)
19689 if (dwarf_version >= 3 || !dwarf_strict)
19690 imported_die = new_die (DW_TAG_imported_module,
19697 imported_die = new_die (DW_TAG_imported_declaration,
19701 add_AT_file (imported_die, DW_AT_decl_file, lookup_filename (xloc.file));
19702 add_AT_unsigned (imported_die, DW_AT_decl_line, xloc.line);
19704 add_AT_string (imported_die, DW_AT_name,
19705 IDENTIFIER_POINTER (name));
19706 add_AT_die_ref (imported_die, DW_AT_import, at_import_die);
19709 /* Output debug information for imported module or decl DECL.
19710 NAME is non-NULL name in context if the decl has been renamed.
19711 CHILD is true if decl is one of the renamed decls as part of
19712 importing whole module. */
19715 dwarf2out_imported_module_or_decl (tree decl, tree name, tree context,
19718 /* dw_die_ref at_import_die; */
19719 dw_die_ref scope_die;
19721 if (debug_info_level <= DINFO_LEVEL_TERSE)
19726 /* To emit DW_TAG_imported_module or DW_TAG_imported_decl, we need two DIEs.
19727 We need decl DIE for reference and scope die. First, get DIE for the decl
19730 /* Get the scope die for decl context. Use comp_unit_die for global module
19731 or decl. If die is not found for non globals, force new die. */
19733 && TYPE_P (context)
19734 && !should_emit_struct_debug (context, DINFO_USAGE_DIR_USE))
19737 if (!(dwarf_version >= 3 || !dwarf_strict))
19740 scope_die = get_context_die (context);
19744 gcc_assert (scope_die->die_child);
19745 gcc_assert (scope_die->die_child->die_tag == DW_TAG_imported_module);
19746 gcc_assert (TREE_CODE (decl) != NAMESPACE_DECL);
19747 scope_die = scope_die->die_child;
19750 /* OK, now we have DIEs for decl as well as scope. Emit imported die. */
19751 dwarf2out_imported_module_or_decl_1 (decl, name, context, scope_die);
19755 /* Write the debugging output for DECL. */
19758 dwarf2out_decl (tree decl)
19760 dw_die_ref context_die = comp_unit_die ();
19762 switch (TREE_CODE (decl))
19767 case FUNCTION_DECL:
19768 /* What we would really like to do here is to filter out all mere
19769 file-scope declarations of file-scope functions which are never
19770 referenced later within this translation unit (and keep all of ones
19771 that *are* referenced later on) but we aren't clairvoyant, so we have
19772 no idea which functions will be referenced in the future (i.e. later
19773 on within the current translation unit). So here we just ignore all
19774 file-scope function declarations which are not also definitions. If
19775 and when the debugger needs to know something about these functions,
19776 it will have to hunt around and find the DWARF information associated
19777 with the definition of the function.
19779 We can't just check DECL_EXTERNAL to find out which FUNCTION_DECL
19780 nodes represent definitions and which ones represent mere
19781 declarations. We have to check DECL_INITIAL instead. That's because
19782 the C front-end supports some weird semantics for "extern inline"
19783 function definitions. These can get inlined within the current
19784 translation unit (and thus, we need to generate Dwarf info for their
19785 abstract instances so that the Dwarf info for the concrete inlined
19786 instances can have something to refer to) but the compiler never
19787 generates any out-of-lines instances of such things (despite the fact
19788 that they *are* definitions).
19790 The important point is that the C front-end marks these "extern
19791 inline" functions as DECL_EXTERNAL, but we need to generate DWARF for
19792 them anyway. Note that the C++ front-end also plays some similar games
19793 for inline function definitions appearing within include files which
19794 also contain `#pragma interface' pragmas. */
19795 if (DECL_INITIAL (decl) == NULL_TREE)
19798 /* If we're a nested function, initially use a parent of NULL; if we're
19799 a plain function, this will be fixed up in decls_for_scope. If
19800 we're a method, it will be ignored, since we already have a DIE. */
19801 if (decl_function_context (decl)
19802 /* But if we're in terse mode, we don't care about scope. */
19803 && debug_info_level > DINFO_LEVEL_TERSE)
19804 context_die = NULL;
19808 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
19809 declaration and if the declaration was never even referenced from
19810 within this entire compilation unit. We suppress these DIEs in
19811 order to save space in the .debug section (by eliminating entries
19812 which are probably useless). Note that we must not suppress
19813 block-local extern declarations (whether used or not) because that
19814 would screw-up the debugger's name lookup mechanism and cause it to
19815 miss things which really ought to be in scope at a given point. */
19816 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
19819 /* For local statics lookup proper context die. */
19820 if (TREE_STATIC (decl) && decl_function_context (decl))
19821 context_die = lookup_decl_die (DECL_CONTEXT (decl));
19823 /* If we are in terse mode, don't generate any DIEs to represent any
19824 variable declarations or definitions. */
19825 if (debug_info_level <= DINFO_LEVEL_TERSE)
19830 if (debug_info_level <= DINFO_LEVEL_TERSE)
19832 if (!is_fortran () && !is_ada ())
19834 if (TREE_STATIC (decl) && decl_function_context (decl))
19835 context_die = lookup_decl_die (DECL_CONTEXT (decl));
19838 case NAMESPACE_DECL:
19839 case IMPORTED_DECL:
19840 if (debug_info_level <= DINFO_LEVEL_TERSE)
19842 if (lookup_decl_die (decl) != NULL)
19847 /* Don't emit stubs for types unless they are needed by other DIEs. */
19848 if (TYPE_DECL_SUPPRESS_DEBUG (decl))
19851 /* Don't bother trying to generate any DIEs to represent any of the
19852 normal built-in types for the language we are compiling. */
19853 if (DECL_IS_BUILTIN (decl))
19856 /* If we are in terse mode, don't generate any DIEs for types. */
19857 if (debug_info_level <= DINFO_LEVEL_TERSE)
19860 /* If we're a function-scope tag, initially use a parent of NULL;
19861 this will be fixed up in decls_for_scope. */
19862 if (decl_function_context (decl))
19863 context_die = NULL;
19871 gen_decl_die (decl, NULL, context_die);
19874 /* Write the debugging output for DECL. */
19877 dwarf2out_function_decl (tree decl)
19879 dwarf2out_decl (decl);
19880 call_arg_locations = NULL;
19881 call_arg_loc_last = NULL;
19882 call_site_count = -1;
19883 tail_call_site_count = -1;
19884 VEC_free (dw_die_ref, heap, block_map);
19885 htab_empty (decl_loc_table);
19886 htab_empty (cached_dw_loc_list_table);
19889 /* Output a marker (i.e. a label) for the beginning of the generated code for
19890 a lexical block. */
19893 dwarf2out_begin_block (unsigned int line ATTRIBUTE_UNUSED,
19894 unsigned int blocknum)
19896 switch_to_section (current_function_section ());
19897 ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
19900 /* Output a marker (i.e. a label) for the end of the generated code for a
19904 dwarf2out_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int blocknum)
19906 switch_to_section (current_function_section ());
19907 ASM_OUTPUT_DEBUG_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
19910 /* Returns nonzero if it is appropriate not to emit any debugging
19911 information for BLOCK, because it doesn't contain any instructions.
19913 Don't allow this for blocks with nested functions or local classes
19914 as we would end up with orphans, and in the presence of scheduling
19915 we may end up calling them anyway. */
19918 dwarf2out_ignore_block (const_tree block)
19923 for (decl = BLOCK_VARS (block); decl; decl = DECL_CHAIN (decl))
19924 if (TREE_CODE (decl) == FUNCTION_DECL
19925 || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)))
19927 for (i = 0; i < BLOCK_NUM_NONLOCALIZED_VARS (block); i++)
19929 decl = BLOCK_NONLOCALIZED_VAR (block, i);
19930 if (TREE_CODE (decl) == FUNCTION_DECL
19931 || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)))
19938 /* Hash table routines for file_hash. */
19941 file_table_eq (const void *p1_p, const void *p2_p)
19943 const struct dwarf_file_data *const p1 =
19944 (const struct dwarf_file_data *) p1_p;
19945 const char *const p2 = (const char *) p2_p;
19946 return filename_cmp (p1->filename, p2) == 0;
19950 file_table_hash (const void *p_p)
19952 const struct dwarf_file_data *const p = (const struct dwarf_file_data *) p_p;
19953 return htab_hash_string (p->filename);
19956 /* Lookup FILE_NAME (in the list of filenames that we know about here in
19957 dwarf2out.c) and return its "index". The index of each (known) filename is
19958 just a unique number which is associated with only that one filename. We
19959 need such numbers for the sake of generating labels (in the .debug_sfnames
19960 section) and references to those files numbers (in the .debug_srcinfo
19961 and.debug_macinfo sections). If the filename given as an argument is not
19962 found in our current list, add it to the list and assign it the next
19963 available unique index number. In order to speed up searches, we remember
19964 the index of the filename was looked up last. This handles the majority of
19967 static struct dwarf_file_data *
19968 lookup_filename (const char *file_name)
19971 struct dwarf_file_data * created;
19973 /* Check to see if the file name that was searched on the previous
19974 call matches this file name. If so, return the index. */
19975 if (file_table_last_lookup
19976 && (file_name == file_table_last_lookup->filename
19977 || filename_cmp (file_table_last_lookup->filename, file_name) == 0))
19978 return file_table_last_lookup;
19980 /* Didn't match the previous lookup, search the table. */
19981 slot = htab_find_slot_with_hash (file_table, file_name,
19982 htab_hash_string (file_name), INSERT);
19984 return (struct dwarf_file_data *) *slot;
19986 created = ggc_alloc_dwarf_file_data ();
19987 created->filename = file_name;
19988 created->emitted_number = 0;
19993 /* If the assembler will construct the file table, then translate the compiler
19994 internal file table number into the assembler file table number, and emit
19995 a .file directive if we haven't already emitted one yet. The file table
19996 numbers are different because we prune debug info for unused variables and
19997 types, which may include filenames. */
20000 maybe_emit_file (struct dwarf_file_data * fd)
20002 if (! fd->emitted_number)
20004 if (last_emitted_file)
20005 fd->emitted_number = last_emitted_file->emitted_number + 1;
20007 fd->emitted_number = 1;
20008 last_emitted_file = fd;
20010 if (DWARF2_ASM_LINE_DEBUG_INFO)
20012 fprintf (asm_out_file, "\t.file %u ", fd->emitted_number);
20013 output_quoted_string (asm_out_file,
20014 remap_debug_filename (fd->filename));
20015 fputc ('\n', asm_out_file);
20019 return fd->emitted_number;
20022 /* Schedule generation of a DW_AT_const_value attribute to DIE.
20023 That generation should happen after function debug info has been
20024 generated. The value of the attribute is the constant value of ARG. */
20027 append_entry_to_tmpl_value_parm_die_table (dw_die_ref die, tree arg)
20029 die_arg_entry entry;
20034 if (!tmpl_value_parm_die_table)
20035 tmpl_value_parm_die_table
20036 = VEC_alloc (die_arg_entry, gc, 32);
20040 VEC_safe_push (die_arg_entry, gc,
20041 tmpl_value_parm_die_table,
20045 /* Return TRUE if T is an instance of generic type, FALSE
20049 generic_type_p (tree t)
20051 if (t == NULL_TREE || !TYPE_P (t))
20053 return lang_hooks.get_innermost_generic_parms (t) != NULL_TREE;
20056 /* Schedule the generation of the generic parameter dies for the
20057 instance of generic type T. The proper generation itself is later
20058 done by gen_scheduled_generic_parms_dies. */
20061 schedule_generic_params_dies_gen (tree t)
20063 if (!generic_type_p (t))
20066 if (generic_type_instances == NULL)
20067 generic_type_instances = VEC_alloc (tree, gc, 256);
20069 VEC_safe_push (tree, gc, generic_type_instances, t);
20072 /* Add a DW_AT_const_value attribute to DIEs that were scheduled
20073 by append_entry_to_tmpl_value_parm_die_table. This function must
20074 be called after function DIEs have been generated. */
20077 gen_remaining_tmpl_value_param_die_attribute (void)
20079 if (tmpl_value_parm_die_table)
20084 FOR_EACH_VEC_ELT (die_arg_entry, tmpl_value_parm_die_table, i, e)
20085 tree_add_const_value_attribute (e->die, e->arg);
20089 /* Generate generic parameters DIEs for instances of generic types
20090 that have been previously scheduled by
20091 schedule_generic_params_dies_gen. This function must be called
20092 after all the types of the CU have been laid out. */
20095 gen_scheduled_generic_parms_dies (void)
20100 if (generic_type_instances == NULL)
20103 FOR_EACH_VEC_ELT (tree, generic_type_instances, i, t)
20104 gen_generic_params_dies (t);
20108 /* Replace DW_AT_name for the decl with name. */
20111 dwarf2out_set_name (tree decl, tree name)
20117 die = TYPE_SYMTAB_DIE (decl);
20121 dname = dwarf2_name (name, 0);
20125 attr = get_AT (die, DW_AT_name);
20128 struct indirect_string_node *node;
20130 node = find_AT_string (dname);
20131 /* replace the string. */
20132 attr->dw_attr_val.v.val_str = node;
20136 add_name_attribute (die, dname);
20139 /* Called by the final INSN scan whenever we see a var location. We
20140 use it to drop labels in the right places, and throw the location in
20141 our lookup table. */
20144 dwarf2out_var_location (rtx loc_note)
20146 char loclabel[MAX_ARTIFICIAL_LABEL_BYTES + 2];
20147 struct var_loc_node *newloc;
20148 rtx next_real, next_note;
20149 static const char *last_label;
20150 static const char *last_postcall_label;
20151 static bool last_in_cold_section_p;
20152 static rtx expected_next_loc_note;
20156 if (!NOTE_P (loc_note))
20158 if (CALL_P (loc_note))
20161 if (SIBLING_CALL_P (loc_note))
20162 tail_call_site_count++;
20167 var_loc_p = NOTE_KIND (loc_note) == NOTE_INSN_VAR_LOCATION;
20168 if (var_loc_p && !DECL_P (NOTE_VAR_LOCATION_DECL (loc_note)))
20171 /* Optimize processing a large consecutive sequence of location
20172 notes so we don't spend too much time in next_real_insn. If the
20173 next insn is another location note, remember the next_real_insn
20174 calculation for next time. */
20175 next_real = cached_next_real_insn;
20178 if (expected_next_loc_note != loc_note)
20179 next_real = NULL_RTX;
20182 next_note = NEXT_INSN (loc_note);
20184 || INSN_DELETED_P (next_note)
20185 || GET_CODE (next_note) != NOTE
20186 || (NOTE_KIND (next_note) != NOTE_INSN_VAR_LOCATION
20187 && NOTE_KIND (next_note) != NOTE_INSN_CALL_ARG_LOCATION))
20188 next_note = NULL_RTX;
20191 next_real = next_real_insn (loc_note);
20195 expected_next_loc_note = next_note;
20196 cached_next_real_insn = next_real;
20199 cached_next_real_insn = NULL_RTX;
20201 /* If there are no instructions which would be affected by this note,
20202 don't do anything. */
20204 && next_real == NULL_RTX
20205 && !NOTE_DURING_CALL_P (loc_note))
20208 if (next_real == NULL_RTX)
20209 next_real = get_last_insn ();
20211 /* If there were any real insns between note we processed last time
20212 and this note (or if it is the first note), clear
20213 last_{,postcall_}label so that they are not reused this time. */
20214 if (last_var_location_insn == NULL_RTX
20215 || last_var_location_insn != next_real
20216 || last_in_cold_section_p != in_cold_section_p)
20219 last_postcall_label = NULL;
20224 decl = NOTE_VAR_LOCATION_DECL (loc_note);
20225 newloc = add_var_loc_to_decl (decl, loc_note,
20226 NOTE_DURING_CALL_P (loc_note)
20227 ? last_postcall_label : last_label);
20228 if (newloc == NULL)
20237 /* If there were no real insns between note we processed last time
20238 and this note, use the label we emitted last time. Otherwise
20239 create a new label and emit it. */
20240 if (last_label == NULL)
20242 ASM_GENERATE_INTERNAL_LABEL (loclabel, "LVL", loclabel_num);
20243 ASM_OUTPUT_DEBUG_LABEL (asm_out_file, "LVL", loclabel_num);
20245 last_label = ggc_strdup (loclabel);
20250 struct call_arg_loc_node *ca_loc
20251 = ggc_alloc_cleared_call_arg_loc_node ();
20252 rtx prev = prev_real_insn (loc_note), x;
20253 ca_loc->call_arg_loc_note = loc_note;
20254 ca_loc->next = NULL;
20255 ca_loc->label = last_label;
20258 || (NONJUMP_INSN_P (prev)
20259 && GET_CODE (PATTERN (prev)) == SEQUENCE
20260 && CALL_P (XVECEXP (PATTERN (prev), 0, 0)))));
20261 if (!CALL_P (prev))
20262 prev = XVECEXP (PATTERN (prev), 0, 0);
20263 ca_loc->tail_call_p = SIBLING_CALL_P (prev);
20264 x = PATTERN (prev);
20265 if (GET_CODE (x) == PARALLEL)
20266 x = XVECEXP (x, 0, 0);
20267 if (GET_CODE (x) == SET)
20269 if (GET_CODE (x) == CALL && MEM_P (XEXP (x, 0)))
20271 x = XEXP (XEXP (x, 0), 0);
20272 if (GET_CODE (x) == SYMBOL_REF
20273 && SYMBOL_REF_DECL (x)
20274 && TREE_CODE (SYMBOL_REF_DECL (x)) == FUNCTION_DECL)
20275 ca_loc->symbol_ref = x;
20277 ca_loc->block = insn_scope (prev);
20278 if (call_arg_locations)
20279 call_arg_loc_last->next = ca_loc;
20281 call_arg_locations = ca_loc;
20282 call_arg_loc_last = ca_loc;
20284 else if (!NOTE_DURING_CALL_P (loc_note))
20285 newloc->label = last_label;
20288 if (!last_postcall_label)
20290 sprintf (loclabel, "%s-1", last_label);
20291 last_postcall_label = ggc_strdup (loclabel);
20293 newloc->label = last_postcall_label;
20296 last_var_location_insn = next_real;
20297 last_in_cold_section_p = in_cold_section_p;
20300 /* Note in one location list that text section has changed. */
20303 var_location_switch_text_section_1 (void **slot, void *data ATTRIBUTE_UNUSED)
20305 var_loc_list *list = (var_loc_list *) *slot;
20307 list->last_before_switch
20308 = list->last->next ? list->last->next : list->last;
20312 /* Note in all location lists that text section has changed. */
20315 var_location_switch_text_section (void)
20317 if (decl_loc_table == NULL)
20320 htab_traverse (decl_loc_table, var_location_switch_text_section_1, NULL);
20323 /* Create a new line number table. */
20325 static dw_line_info_table *
20326 new_line_info_table (void)
20328 dw_line_info_table *table;
20330 table = ggc_alloc_cleared_dw_line_info_table_struct ();
20331 table->file_num = 1;
20332 table->line_num = 1;
20333 table->is_stmt = DWARF_LINE_DEFAULT_IS_STMT_START;
20338 /* Lookup the "current" table into which we emit line info, so
20339 that we don't have to do it for every source line. */
20342 set_cur_line_info_table (section *sec)
20344 dw_line_info_table *table;
20346 if (sec == text_section)
20347 table = text_section_line_info;
20348 else if (sec == cold_text_section)
20350 table = cold_text_section_line_info;
20353 cold_text_section_line_info = table = new_line_info_table ();
20354 table->end_label = cold_end_label;
20359 const char *end_label;
20361 if (flag_reorder_blocks_and_partition)
20363 if (in_cold_section_p)
20364 end_label = crtl->subsections.cold_section_end_label;
20366 end_label = crtl->subsections.hot_section_end_label;
20370 char label[MAX_ARTIFICIAL_LABEL_BYTES];
20371 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL,
20372 current_function_funcdef_no);
20373 end_label = ggc_strdup (label);
20376 table = new_line_info_table ();
20377 table->end_label = end_label;
20379 VEC_safe_push (dw_line_info_table_p, gc, separate_line_info, table);
20382 if (DWARF2_ASM_LINE_DEBUG_INFO)
20383 table->is_stmt = (cur_line_info_table
20384 ? cur_line_info_table->is_stmt
20385 : DWARF_LINE_DEFAULT_IS_STMT_START);
20386 cur_line_info_table = table;
20390 /* We need to reset the locations at the beginning of each
20391 function. We can't do this in the end_function hook, because the
20392 declarations that use the locations won't have been output when
20393 that hook is called. Also compute have_multiple_function_sections here. */
20396 dwarf2out_begin_function (tree fun)
20398 section *sec = function_section (fun);
20400 if (sec != text_section)
20401 have_multiple_function_sections = true;
20403 if (flag_reorder_blocks_and_partition && !cold_text_section)
20405 gcc_assert (current_function_decl == fun);
20406 cold_text_section = unlikely_text_section ();
20407 switch_to_section (cold_text_section);
20408 ASM_OUTPUT_LABEL (asm_out_file, cold_text_section_label);
20409 switch_to_section (sec);
20412 dwarf2out_note_section_used ();
20413 call_site_count = 0;
20414 tail_call_site_count = 0;
20416 set_cur_line_info_table (sec);
20419 /* Add OPCODE+VAL as an entry at the end of the opcode array in TABLE. */
20422 push_dw_line_info_entry (dw_line_info_table *table,
20423 enum dw_line_info_opcode opcode, unsigned int val)
20425 dw_line_info_entry e;
20428 VEC_safe_push (dw_line_info_entry, gc, table->entries, &e);
20431 /* Output a label to mark the beginning of a source code line entry
20432 and record information relating to this source line, in
20433 'line_info_table' for later output of the .debug_line section. */
20434 /* ??? The discriminator parameter ought to be unsigned. */
20437 dwarf2out_source_line (unsigned int line, const char *filename,
20438 int discriminator, bool is_stmt)
20440 unsigned int file_num;
20441 dw_line_info_table *table;
20443 if (debug_info_level < DINFO_LEVEL_NORMAL || line == 0)
20446 /* The discriminator column was added in dwarf4. Simplify the below
20447 by simply removing it if we're not supposed to output it. */
20448 if (dwarf_version < 4 && dwarf_strict)
20451 table = cur_line_info_table;
20452 file_num = maybe_emit_file (lookup_filename (filename));
20454 /* ??? TODO: Elide duplicate line number entries. Traditionally,
20455 the debugger has used the second (possibly duplicate) line number
20456 at the beginning of the function to mark the end of the prologue.
20457 We could eliminate any other duplicates within the function. For
20458 Dwarf3, we ought to include the DW_LNS_set_prologue_end mark in
20459 that second line number entry. */
20460 /* Recall that this end-of-prologue indication is *not* the same thing
20461 as the end_prologue debug hook. The NOTE_INSN_PROLOGUE_END note,
20462 to which the hook corresponds, follows the last insn that was
20463 emitted by gen_prologue. What we need is to preceed the first insn
20464 that had been emitted after NOTE_INSN_FUNCTION_BEG, i.e. the first
20465 insn that corresponds to something the user wrote. These may be
20466 very different locations once scheduling is enabled. */
20468 if (0 && file_num == table->file_num
20469 && line == table->line_num
20470 && discriminator == table->discrim_num
20471 && is_stmt == table->is_stmt)
20474 switch_to_section (current_function_section ());
20476 /* If requested, emit something human-readable. */
20477 if (flag_debug_asm)
20478 fprintf (asm_out_file, "\t%s %s:%d\n", ASM_COMMENT_START, filename, line);
20480 if (DWARF2_ASM_LINE_DEBUG_INFO)
20482 /* Emit the .loc directive understood by GNU as. */
20483 /* "\t.loc %u %u 0 is_stmt %u discriminator %u",
20484 file_num, line, is_stmt, discriminator */
20485 fputs ("\t.loc ", asm_out_file);
20486 fprint_ul (asm_out_file, file_num);
20487 putc (' ', asm_out_file);
20488 fprint_ul (asm_out_file, line);
20489 putc (' ', asm_out_file);
20490 putc ('0', asm_out_file);
20492 if (is_stmt != table->is_stmt)
20494 fputs (" is_stmt ", asm_out_file);
20495 putc (is_stmt ? '1' : '0', asm_out_file);
20497 if (SUPPORTS_DISCRIMINATOR && discriminator != 0)
20499 gcc_assert (discriminator > 0);
20500 fputs (" discriminator ", asm_out_file);
20501 fprint_ul (asm_out_file, (unsigned long) discriminator);
20503 putc ('\n', asm_out_file);
20507 unsigned int label_num = ++line_info_label_num;
20509 targetm.asm_out.internal_label (asm_out_file, LINE_CODE_LABEL, label_num);
20511 push_dw_line_info_entry (table, LI_set_address, label_num);
20512 if (file_num != table->file_num)
20513 push_dw_line_info_entry (table, LI_set_file, file_num);
20514 if (discriminator != table->discrim_num)
20515 push_dw_line_info_entry (table, LI_set_discriminator, discriminator);
20516 if (is_stmt != table->is_stmt)
20517 push_dw_line_info_entry (table, LI_negate_stmt, 0);
20518 push_dw_line_info_entry (table, LI_set_line, line);
20521 table->file_num = file_num;
20522 table->line_num = line;
20523 table->discrim_num = discriminator;
20524 table->is_stmt = is_stmt;
20525 table->in_use = true;
20528 /* Record the beginning of a new source file. */
20531 dwarf2out_start_source_file (unsigned int lineno, const char *filename)
20533 if (flag_eliminate_dwarf2_dups && ! use_debug_types)
20535 /* Record the beginning of the file for break_out_includes. */
20536 dw_die_ref bincl_die;
20538 bincl_die = new_die (DW_TAG_GNU_BINCL, comp_unit_die (), NULL);
20539 add_AT_string (bincl_die, DW_AT_name, remap_debug_filename (filename));
20542 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
20545 e.code = DW_MACINFO_start_file;
20547 e.info = xstrdup (filename);
20548 VEC_safe_push (macinfo_entry, gc, macinfo_table, &e);
20552 /* Record the end of a source file. */
20555 dwarf2out_end_source_file (unsigned int lineno ATTRIBUTE_UNUSED)
20557 if (flag_eliminate_dwarf2_dups && ! use_debug_types)
20558 /* Record the end of the file for break_out_includes. */
20559 new_die (DW_TAG_GNU_EINCL, comp_unit_die (), NULL);
20561 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
20564 e.code = DW_MACINFO_end_file;
20567 VEC_safe_push (macinfo_entry, gc, macinfo_table, &e);
20571 /* Called from debug_define in toplev.c. The `buffer' parameter contains
20572 the tail part of the directive line, i.e. the part which is past the
20573 initial whitespace, #, whitespace, directive-name, whitespace part. */
20576 dwarf2out_define (unsigned int lineno ATTRIBUTE_UNUSED,
20577 const char *buffer ATTRIBUTE_UNUSED)
20579 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
20582 /* Insert a dummy first entry to be able to optimize the whole
20583 predefined macro block using DW_MACRO_GNU_transparent_include. */
20584 if (VEC_empty (macinfo_entry, macinfo_table) && lineno == 0)
20589 VEC_safe_push (macinfo_entry, gc, macinfo_table, &e);
20591 e.code = DW_MACINFO_define;
20593 e.info = xstrdup (buffer);;
20594 VEC_safe_push (macinfo_entry, gc, macinfo_table, &e);
20598 /* Called from debug_undef in toplev.c. The `buffer' parameter contains
20599 the tail part of the directive line, i.e. the part which is past the
20600 initial whitespace, #, whitespace, directive-name, whitespace part. */
20603 dwarf2out_undef (unsigned int lineno ATTRIBUTE_UNUSED,
20604 const char *buffer ATTRIBUTE_UNUSED)
20606 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
20609 /* Insert a dummy first entry to be able to optimize the whole
20610 predefined macro block using DW_MACRO_GNU_transparent_include. */
20611 if (VEC_empty (macinfo_entry, macinfo_table) && lineno == 0)
20616 VEC_safe_push (macinfo_entry, gc, macinfo_table, &e);
20618 e.code = DW_MACINFO_undef;
20620 e.info = xstrdup (buffer);
20621 VEC_safe_push (macinfo_entry, gc, macinfo_table, &e);
20625 /* Routines to manipulate hash table of CUs. */
20628 htab_macinfo_hash (const void *of)
20630 const macinfo_entry *const entry =
20631 (const macinfo_entry *) of;
20633 return htab_hash_string (entry->info);
20637 htab_macinfo_eq (const void *of1, const void *of2)
20639 const macinfo_entry *const entry1 = (const macinfo_entry *) of1;
20640 const macinfo_entry *const entry2 = (const macinfo_entry *) of2;
20642 return !strcmp (entry1->info, entry2->info);
20645 /* Output a single .debug_macinfo entry. */
20648 output_macinfo_op (macinfo_entry *ref)
20652 struct indirect_string_node *node;
20653 char label[MAX_ARTIFICIAL_LABEL_BYTES];
20654 struct dwarf_file_data *fd;
20658 case DW_MACINFO_start_file:
20659 fd = lookup_filename (ref->info);
20660 if (fd->filename == ref->info)
20661 fd->filename = ggc_strdup (fd->filename);
20662 file_num = maybe_emit_file (fd);
20663 dw2_asm_output_data (1, DW_MACINFO_start_file, "Start new file");
20664 dw2_asm_output_data_uleb128 (ref->lineno,
20665 "Included from line number %lu",
20666 (unsigned long) ref->lineno);
20667 dw2_asm_output_data_uleb128 (file_num, "file %s", ref->info);
20669 case DW_MACINFO_end_file:
20670 dw2_asm_output_data (1, DW_MACINFO_end_file, "End file");
20672 case DW_MACINFO_define:
20673 case DW_MACINFO_undef:
20674 len = strlen (ref->info) + 1;
20676 && len > DWARF_OFFSET_SIZE
20677 && !DWARF2_INDIRECT_STRING_SUPPORT_MISSING_ON_TARGET
20678 && (debug_str_section->common.flags & SECTION_MERGE) != 0)
20680 ref->code = ref->code == DW_MACINFO_define
20681 ? DW_MACRO_GNU_define_indirect
20682 : DW_MACRO_GNU_undef_indirect;
20683 output_macinfo_op (ref);
20686 dw2_asm_output_data (1, ref->code,
20687 ref->code == DW_MACINFO_define
20688 ? "Define macro" : "Undefine macro");
20689 dw2_asm_output_data_uleb128 (ref->lineno, "At line number %lu",
20690 (unsigned long) ref->lineno);
20691 dw2_asm_output_nstring (ref->info, -1, "The macro");
20693 case DW_MACRO_GNU_define_indirect:
20694 case DW_MACRO_GNU_undef_indirect:
20695 node = find_AT_string (ref->info);
20696 if (node->form != DW_FORM_strp)
20699 ASM_GENERATE_INTERNAL_LABEL (label, "LASF", dw2_string_counter);
20700 ++dw2_string_counter;
20701 node->label = xstrdup (label);
20702 node->form = DW_FORM_strp;
20704 dw2_asm_output_data (1, ref->code,
20705 ref->code == DW_MACRO_GNU_define_indirect
20706 ? "Define macro indirect"
20707 : "Undefine macro indirect");
20708 dw2_asm_output_data_uleb128 (ref->lineno, "At line number %lu",
20709 (unsigned long) ref->lineno);
20710 dw2_asm_output_offset (DWARF_OFFSET_SIZE, node->label,
20711 debug_str_section, "The macro: \"%s\"",
20714 case DW_MACRO_GNU_transparent_include:
20715 dw2_asm_output_data (1, ref->code, "Transparent include");
20716 ASM_GENERATE_INTERNAL_LABEL (label,
20717 DEBUG_MACRO_SECTION_LABEL, ref->lineno);
20718 dw2_asm_output_offset (DWARF_OFFSET_SIZE, label, NULL, NULL);
20721 fprintf (asm_out_file, "%s unrecognized macinfo code %lu\n",
20722 ASM_COMMENT_START, (unsigned long) ref->code);
20727 /* Attempt to make a sequence of define/undef macinfo ops shareable with
20728 other compilation unit .debug_macinfo sections. IDX is the first
20729 index of a define/undef, return the number of ops that should be
20730 emitted in a comdat .debug_macinfo section and emit
20731 a DW_MACRO_GNU_transparent_include entry referencing it.
20732 If the define/undef entry should be emitted normally, return 0. */
20735 optimize_macinfo_range (unsigned int idx, VEC (macinfo_entry, gc) *files,
20736 htab_t *macinfo_htab)
20738 macinfo_entry *first, *second, *cur, *inc;
20739 char linebuf[sizeof (HOST_WIDE_INT) * 3 + 1];
20740 unsigned char checksum[16];
20741 struct md5_ctx ctx;
20742 char *grp_name, *tail;
20744 unsigned int i, count, encoded_filename_len, linebuf_len;
20747 first = VEC_index (macinfo_entry, macinfo_table, idx);
20748 second = VEC_index (macinfo_entry, macinfo_table, idx + 1);
20750 /* Optimize only if there are at least two consecutive define/undef ops,
20751 and either all of them are before first DW_MACINFO_start_file
20752 with lineno 0 (i.e. predefined macro block), or all of them are
20753 in some included header file. */
20754 if (second->code != DW_MACINFO_define && second->code != DW_MACINFO_undef)
20756 if (VEC_empty (macinfo_entry, files))
20758 if (first->lineno != 0 || second->lineno != 0)
20761 else if (first->lineno == 0)
20764 /* Find the last define/undef entry that can be grouped together
20765 with first and at the same time compute md5 checksum of their
20766 codes, linenumbers and strings. */
20767 md5_init_ctx (&ctx);
20768 for (i = idx; VEC_iterate (macinfo_entry, macinfo_table, i, cur); i++)
20769 if (cur->code != DW_MACINFO_define && cur->code != DW_MACINFO_undef)
20771 else if (first->lineno == 0 && cur->lineno != 0)
20775 unsigned char code = cur->code;
20776 md5_process_bytes (&code, 1, &ctx);
20777 checksum_uleb128 (cur->lineno, &ctx);
20778 md5_process_bytes (cur->info, strlen (cur->info) + 1, &ctx);
20780 md5_finish_ctx (&ctx, checksum);
20783 /* From the containing include filename (if any) pick up just
20784 usable characters from its basename. */
20785 if (first->lineno == 0)
20788 base = lbasename (VEC_last (macinfo_entry, files)->info);
20789 for (encoded_filename_len = 0, i = 0; base[i]; i++)
20790 if (ISIDNUM (base[i]) || base[i] == '.')
20791 encoded_filename_len++;
20792 /* Count . at the end. */
20793 if (encoded_filename_len)
20794 encoded_filename_len++;
20796 sprintf (linebuf, HOST_WIDE_INT_PRINT_UNSIGNED, first->lineno);
20797 linebuf_len = strlen (linebuf);
20799 /* The group name format is: wmN.[<encoded filename>.]<lineno>.<md5sum> */
20800 grp_name = XNEWVEC (char, 4 + encoded_filename_len + linebuf_len + 1
20802 memcpy (grp_name, DWARF_OFFSET_SIZE == 4 ? "wm4." : "wm8.", 4);
20803 tail = grp_name + 4;
20804 if (encoded_filename_len)
20806 for (i = 0; base[i]; i++)
20807 if (ISIDNUM (base[i]) || base[i] == '.')
20811 memcpy (tail, linebuf, linebuf_len);
20812 tail += linebuf_len;
20814 for (i = 0; i < 16; i++)
20815 sprintf (tail + i * 2, "%02x", checksum[i] & 0xff);
20817 /* Construct a macinfo_entry for DW_MACRO_GNU_transparent_include
20818 in the empty vector entry before the first define/undef. */
20819 inc = VEC_index (macinfo_entry, macinfo_table, idx - 1);
20820 inc->code = DW_MACRO_GNU_transparent_include;
20822 inc->info = grp_name;
20823 if (*macinfo_htab == NULL)
20824 *macinfo_htab = htab_create (10, htab_macinfo_hash, htab_macinfo_eq, NULL);
20825 /* Avoid emitting duplicates. */
20826 slot = htab_find_slot (*macinfo_htab, inc, INSERT);
20829 free (CONST_CAST (char *, inc->info));
20832 /* If such an entry has been used before, just emit
20833 a DW_MACRO_GNU_transparent_include op. */
20834 inc = (macinfo_entry *) *slot;
20835 output_macinfo_op (inc);
20836 /* And clear all macinfo_entry in the range to avoid emitting them
20837 in the second pass. */
20839 VEC_iterate (macinfo_entry, macinfo_table, i, cur)
20840 && i < idx + count;
20844 free (CONST_CAST (char *, cur->info));
20851 inc->lineno = htab_elements (*macinfo_htab);
20852 output_macinfo_op (inc);
20857 /* Output macinfo section(s). */
20860 output_macinfo (void)
20863 unsigned long length = VEC_length (macinfo_entry, macinfo_table);
20864 macinfo_entry *ref;
20865 VEC (macinfo_entry, gc) *files = NULL;
20866 htab_t macinfo_htab = NULL;
20871 /* output_macinfo* uses these interchangeably. */
20872 gcc_assert ((int) DW_MACINFO_define == (int) DW_MACRO_GNU_define
20873 && (int) DW_MACINFO_undef == (int) DW_MACRO_GNU_undef
20874 && (int) DW_MACINFO_start_file == (int) DW_MACRO_GNU_start_file
20875 && (int) DW_MACINFO_end_file == (int) DW_MACRO_GNU_end_file);
20877 /* For .debug_macro emit the section header. */
20880 dw2_asm_output_data (2, 4, "DWARF macro version number");
20881 if (DWARF_OFFSET_SIZE == 8)
20882 dw2_asm_output_data (1, 3, "Flags: 64-bit, lineptr present");
20884 dw2_asm_output_data (1, 2, "Flags: 32-bit, lineptr present");
20885 dw2_asm_output_offset (DWARF_OFFSET_SIZE, debug_line_section_label,
20886 debug_line_section, NULL);
20889 /* In the first loop, it emits the primary .debug_macinfo section
20890 and after each emitted op the macinfo_entry is cleared.
20891 If a longer range of define/undef ops can be optimized using
20892 DW_MACRO_GNU_transparent_include, the
20893 DW_MACRO_GNU_transparent_include op is emitted and kept in
20894 the vector before the first define/undef in the range and the
20895 whole range of define/undef ops is not emitted and kept. */
20896 for (i = 0; VEC_iterate (macinfo_entry, macinfo_table, i, ref); i++)
20900 case DW_MACINFO_start_file:
20901 VEC_safe_push (macinfo_entry, gc, files, ref);
20903 case DW_MACINFO_end_file:
20904 if (!VEC_empty (macinfo_entry, files))
20906 macinfo_entry *file = VEC_last (macinfo_entry, files);
20907 free (CONST_CAST (char *, file->info));
20908 VEC_pop (macinfo_entry, files);
20911 case DW_MACINFO_define:
20912 case DW_MACINFO_undef:
20914 && HAVE_COMDAT_GROUP
20915 && VEC_length (macinfo_entry, files) != 1
20918 && VEC_index (macinfo_entry, macinfo_table, i - 1)->code == 0)
20920 unsigned count = optimize_macinfo_range (i, files, &macinfo_htab);
20929 /* A dummy entry may be inserted at the beginning to be able
20930 to optimize the whole block of predefined macros. */
20936 output_macinfo_op (ref);
20937 /* For DW_MACINFO_start_file ref->info has been copied into files
20939 if (ref->code != DW_MACINFO_start_file)
20940 free (CONST_CAST (char *, ref->info));
20945 if (macinfo_htab == NULL)
20948 htab_delete (macinfo_htab);
20950 /* If any DW_MACRO_GNU_transparent_include were used, on those
20951 DW_MACRO_GNU_transparent_include entries terminate the
20952 current chain and switch to a new comdat .debug_macinfo
20953 section and emit the define/undef entries within it. */
20954 for (i = 0; VEC_iterate (macinfo_entry, macinfo_table, i, ref); i++)
20959 case DW_MACRO_GNU_transparent_include:
20961 char label[MAX_ARTIFICIAL_LABEL_BYTES];
20962 tree comdat_key = get_identifier (ref->info);
20963 /* Terminate the previous .debug_macinfo section. */
20964 dw2_asm_output_data (1, 0, "End compilation unit");
20965 targetm.asm_out.named_section (DEBUG_MACRO_SECTION,
20967 | SECTION_LINKONCE,
20969 ASM_GENERATE_INTERNAL_LABEL (label,
20970 DEBUG_MACRO_SECTION_LABEL,
20972 ASM_OUTPUT_LABEL (asm_out_file, label);
20974 free (CONST_CAST (char *, ref->info));
20976 dw2_asm_output_data (2, 4, "DWARF macro version number");
20977 if (DWARF_OFFSET_SIZE == 8)
20978 dw2_asm_output_data (1, 1, "Flags: 64-bit");
20980 dw2_asm_output_data (1, 0, "Flags: 32-bit");
20983 case DW_MACINFO_define:
20984 case DW_MACINFO_undef:
20985 output_macinfo_op (ref);
20987 free (CONST_CAST (char *, ref->info));
20991 gcc_unreachable ();
20995 /* Set up for Dwarf output at the start of compilation. */
20998 dwarf2out_init (const char *filename ATTRIBUTE_UNUSED)
21000 /* Allocate the file_table. */
21001 file_table = htab_create_ggc (50, file_table_hash,
21002 file_table_eq, NULL);
21004 /* Allocate the decl_die_table. */
21005 decl_die_table = htab_create_ggc (10, decl_die_table_hash,
21006 decl_die_table_eq, NULL);
21008 /* Allocate the decl_loc_table. */
21009 decl_loc_table = htab_create_ggc (10, decl_loc_table_hash,
21010 decl_loc_table_eq, NULL);
21012 /* Allocate the cached_dw_loc_list_table. */
21013 cached_dw_loc_list_table
21014 = htab_create_ggc (10, cached_dw_loc_list_table_hash,
21015 cached_dw_loc_list_table_eq, NULL);
21017 /* Allocate the initial hunk of the decl_scope_table. */
21018 decl_scope_table = VEC_alloc (tree, gc, 256);
21020 /* Allocate the initial hunk of the abbrev_die_table. */
21021 abbrev_die_table = ggc_alloc_cleared_vec_dw_die_ref
21022 (ABBREV_DIE_TABLE_INCREMENT);
21023 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
21024 /* Zero-th entry is allocated, but unused. */
21025 abbrev_die_table_in_use = 1;
21027 /* Allocate the pubtypes and pubnames vectors. */
21028 pubname_table = VEC_alloc (pubname_entry, gc, 32);
21029 pubtype_table = VEC_alloc (pubname_entry, gc, 32);
21031 incomplete_types = VEC_alloc (tree, gc, 64);
21033 used_rtx_array = VEC_alloc (rtx, gc, 32);
21035 debug_info_section = get_section (DEBUG_INFO_SECTION,
21036 SECTION_DEBUG, NULL);
21037 debug_abbrev_section = get_section (DEBUG_ABBREV_SECTION,
21038 SECTION_DEBUG, NULL);
21039 debug_aranges_section = get_section (DEBUG_ARANGES_SECTION,
21040 SECTION_DEBUG, NULL);
21041 debug_macinfo_section = get_section (dwarf_strict
21042 ? DEBUG_MACINFO_SECTION
21043 : DEBUG_MACRO_SECTION,
21044 SECTION_DEBUG, NULL);
21045 debug_line_section = get_section (DEBUG_LINE_SECTION,
21046 SECTION_DEBUG, NULL);
21047 debug_loc_section = get_section (DEBUG_LOC_SECTION,
21048 SECTION_DEBUG, NULL);
21049 debug_pubnames_section = get_section (DEBUG_PUBNAMES_SECTION,
21050 SECTION_DEBUG, NULL);
21051 debug_pubtypes_section = get_section (DEBUG_PUBTYPES_SECTION,
21052 SECTION_DEBUG, NULL);
21053 debug_str_section = get_section (DEBUG_STR_SECTION,
21054 DEBUG_STR_SECTION_FLAGS, NULL);
21055 debug_ranges_section = get_section (DEBUG_RANGES_SECTION,
21056 SECTION_DEBUG, NULL);
21057 debug_frame_section = get_section (DEBUG_FRAME_SECTION,
21058 SECTION_DEBUG, NULL);
21060 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
21061 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label,
21062 DEBUG_ABBREV_SECTION_LABEL, 0);
21063 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
21064 ASM_GENERATE_INTERNAL_LABEL (cold_text_section_label,
21065 COLD_TEXT_SECTION_LABEL, 0);
21066 ASM_GENERATE_INTERNAL_LABEL (cold_end_label, COLD_END_LABEL, 0);
21068 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
21069 DEBUG_INFO_SECTION_LABEL, 0);
21070 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
21071 DEBUG_LINE_SECTION_LABEL, 0);
21072 ASM_GENERATE_INTERNAL_LABEL (ranges_section_label,
21073 DEBUG_RANGES_SECTION_LABEL, 0);
21074 ASM_GENERATE_INTERNAL_LABEL (macinfo_section_label,
21076 ? DEBUG_MACINFO_SECTION_LABEL
21077 : DEBUG_MACRO_SECTION_LABEL, 0);
21079 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
21080 macinfo_table = VEC_alloc (macinfo_entry, gc, 64);
21082 switch_to_section (text_section);
21083 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
21085 /* Make sure the line number table for .text always exists. */
21086 text_section_line_info = new_line_info_table ();
21087 text_section_line_info->end_label = text_end_label;
21090 /* Called before cgraph_optimize starts outputtting functions, variables
21091 and toplevel asms into assembly. */
21094 dwarf2out_assembly_start (void)
21096 if (HAVE_GAS_CFI_SECTIONS_DIRECTIVE
21097 && dwarf2out_do_cfi_asm ()
21098 && (!(flag_unwind_tables || flag_exceptions)
21099 || targetm_common.except_unwind_info (&global_options) != UI_DWARF2))
21100 fprintf (asm_out_file, "\t.cfi_sections\t.debug_frame\n");
21103 /* A helper function for dwarf2out_finish called through
21104 htab_traverse. Emit one queued .debug_str string. */
21107 output_indirect_string (void **h, void *v ATTRIBUTE_UNUSED)
21109 struct indirect_string_node *node = (struct indirect_string_node *) *h;
21111 if (node->form == DW_FORM_strp)
21113 switch_to_section (debug_str_section);
21114 ASM_OUTPUT_LABEL (asm_out_file, node->label);
21115 assemble_string (node->str, strlen (node->str) + 1);
21121 #if ENABLE_ASSERT_CHECKING
21122 /* Verify that all marks are clear. */
21125 verify_marks_clear (dw_die_ref die)
21129 gcc_assert (! die->die_mark);
21130 FOR_EACH_CHILD (die, c, verify_marks_clear (c));
21132 #endif /* ENABLE_ASSERT_CHECKING */
21134 /* Clear the marks for a die and its children.
21135 Be cool if the mark isn't set. */
21138 prune_unmark_dies (dw_die_ref die)
21144 FOR_EACH_CHILD (die, c, prune_unmark_dies (c));
21147 /* Given DIE that we're marking as used, find any other dies
21148 it references as attributes and mark them as used. */
21151 prune_unused_types_walk_attribs (dw_die_ref die)
21156 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
21158 if (a->dw_attr_val.val_class == dw_val_class_die_ref)
21160 /* A reference to another DIE.
21161 Make sure that it will get emitted.
21162 If it was broken out into a comdat group, don't follow it. */
21163 if (! use_debug_types
21164 || a->dw_attr == DW_AT_specification
21165 || a->dw_attr_val.v.val_die_ref.die->die_id.die_type_node == NULL)
21166 prune_unused_types_mark (a->dw_attr_val.v.val_die_ref.die, 1);
21168 /* Set the string's refcount to 0 so that prune_unused_types_mark
21169 accounts properly for it. */
21170 if (AT_class (a) == dw_val_class_str)
21171 a->dw_attr_val.v.val_str->refcount = 0;
21175 /* Mark the generic parameters and arguments children DIEs of DIE. */
21178 prune_unused_types_mark_generic_parms_dies (dw_die_ref die)
21182 if (die == NULL || die->die_child == NULL)
21184 c = die->die_child;
21187 switch (c->die_tag)
21189 case DW_TAG_template_type_param:
21190 case DW_TAG_template_value_param:
21191 case DW_TAG_GNU_template_template_param:
21192 case DW_TAG_GNU_template_parameter_pack:
21193 prune_unused_types_mark (c, 1);
21199 } while (c && c != die->die_child);
21202 /* Mark DIE as being used. If DOKIDS is true, then walk down
21203 to DIE's children. */
21206 prune_unused_types_mark (dw_die_ref die, int dokids)
21210 if (die->die_mark == 0)
21212 /* We haven't done this node yet. Mark it as used. */
21214 /* If this is the DIE of a generic type instantiation,
21215 mark the children DIEs that describe its generic parms and
21217 prune_unused_types_mark_generic_parms_dies (die);
21219 /* We also have to mark its parents as used.
21220 (But we don't want to mark our parents' kids due to this.) */
21221 if (die->die_parent)
21222 prune_unused_types_mark (die->die_parent, 0);
21224 /* Mark any referenced nodes. */
21225 prune_unused_types_walk_attribs (die);
21227 /* If this node is a specification,
21228 also mark the definition, if it exists. */
21229 if (get_AT_flag (die, DW_AT_declaration) && die->die_definition)
21230 prune_unused_types_mark (die->die_definition, 1);
21233 if (dokids && die->die_mark != 2)
21235 /* We need to walk the children, but haven't done so yet.
21236 Remember that we've walked the kids. */
21239 /* If this is an array type, we need to make sure our
21240 kids get marked, even if they're types. If we're
21241 breaking out types into comdat sections, do this
21242 for all type definitions. */
21243 if (die->die_tag == DW_TAG_array_type
21244 || (use_debug_types
21245 && is_type_die (die) && ! is_declaration_die (die)))
21246 FOR_EACH_CHILD (die, c, prune_unused_types_mark (c, 1));
21248 FOR_EACH_CHILD (die, c, prune_unused_types_walk (c));
21252 /* For local classes, look if any static member functions were emitted
21253 and if so, mark them. */
21256 prune_unused_types_walk_local_classes (dw_die_ref die)
21260 if (die->die_mark == 2)
21263 switch (die->die_tag)
21265 case DW_TAG_structure_type:
21266 case DW_TAG_union_type:
21267 case DW_TAG_class_type:
21270 case DW_TAG_subprogram:
21271 if (!get_AT_flag (die, DW_AT_declaration)
21272 || die->die_definition != NULL)
21273 prune_unused_types_mark (die, 1);
21280 /* Mark children. */
21281 FOR_EACH_CHILD (die, c, prune_unused_types_walk_local_classes (c));
21284 /* Walk the tree DIE and mark types that we actually use. */
21287 prune_unused_types_walk (dw_die_ref die)
21291 /* Don't do anything if this node is already marked and
21292 children have been marked as well. */
21293 if (die->die_mark == 2)
21296 switch (die->die_tag)
21298 case DW_TAG_structure_type:
21299 case DW_TAG_union_type:
21300 case DW_TAG_class_type:
21301 if (die->die_perennial_p)
21304 for (c = die->die_parent; c; c = c->die_parent)
21305 if (c->die_tag == DW_TAG_subprogram)
21308 /* Finding used static member functions inside of classes
21309 is needed just for local classes, because for other classes
21310 static member function DIEs with DW_AT_specification
21311 are emitted outside of the DW_TAG_*_type. If we ever change
21312 it, we'd need to call this even for non-local classes. */
21314 prune_unused_types_walk_local_classes (die);
21316 /* It's a type node --- don't mark it. */
21319 case DW_TAG_const_type:
21320 case DW_TAG_packed_type:
21321 case DW_TAG_pointer_type:
21322 case DW_TAG_reference_type:
21323 case DW_TAG_rvalue_reference_type:
21324 case DW_TAG_volatile_type:
21325 case DW_TAG_typedef:
21326 case DW_TAG_array_type:
21327 case DW_TAG_interface_type:
21328 case DW_TAG_friend:
21329 case DW_TAG_variant_part:
21330 case DW_TAG_enumeration_type:
21331 case DW_TAG_subroutine_type:
21332 case DW_TAG_string_type:
21333 case DW_TAG_set_type:
21334 case DW_TAG_subrange_type:
21335 case DW_TAG_ptr_to_member_type:
21336 case DW_TAG_file_type:
21337 if (die->die_perennial_p)
21340 /* It's a type node --- don't mark it. */
21344 /* Mark everything else. */
21348 if (die->die_mark == 0)
21352 /* Now, mark any dies referenced from here. */
21353 prune_unused_types_walk_attribs (die);
21358 /* Mark children. */
21359 FOR_EACH_CHILD (die, c, prune_unused_types_walk (c));
21362 /* Increment the string counts on strings referred to from DIE's
21366 prune_unused_types_update_strings (dw_die_ref die)
21371 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
21372 if (AT_class (a) == dw_val_class_str)
21374 struct indirect_string_node *s = a->dw_attr_val.v.val_str;
21376 /* Avoid unnecessarily putting strings that are used less than
21377 twice in the hash table. */
21379 == ((DEBUG_STR_SECTION_FLAGS & SECTION_MERGE) ? 1 : 2))
21382 slot = htab_find_slot_with_hash (debug_str_hash, s->str,
21383 htab_hash_string (s->str),
21385 gcc_assert (*slot == NULL);
21391 /* Remove from the tree DIE any dies that aren't marked. */
21394 prune_unused_types_prune (dw_die_ref die)
21398 gcc_assert (die->die_mark);
21399 prune_unused_types_update_strings (die);
21401 if (! die->die_child)
21404 c = die->die_child;
21406 dw_die_ref prev = c;
21407 for (c = c->die_sib; ! c->die_mark; c = c->die_sib)
21408 if (c == die->die_child)
21410 /* No marked children between 'prev' and the end of the list. */
21412 /* No marked children at all. */
21413 die->die_child = NULL;
21416 prev->die_sib = c->die_sib;
21417 die->die_child = prev;
21422 if (c != prev->die_sib)
21424 prune_unused_types_prune (c);
21425 } while (c != die->die_child);
21428 /* Remove dies representing declarations that we never use. */
21431 prune_unused_types (void)
21434 limbo_die_node *node;
21435 comdat_type_node *ctnode;
21437 dw_die_ref base_type;
21439 #if ENABLE_ASSERT_CHECKING
21440 /* All the marks should already be clear. */
21441 verify_marks_clear (comp_unit_die ());
21442 for (node = limbo_die_list; node; node = node->next)
21443 verify_marks_clear (node->die);
21444 for (ctnode = comdat_type_list; ctnode; ctnode = ctnode->next)
21445 verify_marks_clear (ctnode->root_die);
21446 #endif /* ENABLE_ASSERT_CHECKING */
21448 /* Mark types that are used in global variables. */
21449 premark_types_used_by_global_vars ();
21451 /* Set the mark on nodes that are actually used. */
21452 prune_unused_types_walk (comp_unit_die ());
21453 for (node = limbo_die_list; node; node = node->next)
21454 prune_unused_types_walk (node->die);
21455 for (ctnode = comdat_type_list; ctnode; ctnode = ctnode->next)
21457 prune_unused_types_walk (ctnode->root_die);
21458 prune_unused_types_mark (ctnode->type_die, 1);
21461 /* Also set the mark on nodes referenced from the
21463 FOR_EACH_VEC_ELT (pubname_entry, pubname_table, i, pub)
21464 prune_unused_types_mark (pub->die, 1);
21465 for (i = 0; VEC_iterate (dw_die_ref, base_types, i, base_type); i++)
21466 prune_unused_types_mark (base_type, 1);
21468 if (debug_str_hash)
21469 htab_empty (debug_str_hash);
21470 prune_unused_types_prune (comp_unit_die ());
21471 for (node = limbo_die_list; node; node = node->next)
21472 prune_unused_types_prune (node->die);
21473 for (ctnode = comdat_type_list; ctnode; ctnode = ctnode->next)
21474 prune_unused_types_prune (ctnode->root_die);
21476 /* Leave the marks clear. */
21477 prune_unmark_dies (comp_unit_die ());
21478 for (node = limbo_die_list; node; node = node->next)
21479 prune_unmark_dies (node->die);
21480 for (ctnode = comdat_type_list; ctnode; ctnode = ctnode->next)
21481 prune_unmark_dies (ctnode->root_die);
21484 /* Set the parameter to true if there are any relative pathnames in
21487 file_table_relative_p (void ** slot, void *param)
21489 bool *p = (bool *) param;
21490 struct dwarf_file_data *d = (struct dwarf_file_data *) *slot;
21491 if (!IS_ABSOLUTE_PATH (d->filename))
21499 /* Routines to manipulate hash table of comdat type units. */
21502 htab_ct_hash (const void *of)
21505 const comdat_type_node *const type_node = (const comdat_type_node *) of;
21507 memcpy (&h, type_node->signature, sizeof (h));
21512 htab_ct_eq (const void *of1, const void *of2)
21514 const comdat_type_node *const type_node_1 = (const comdat_type_node *) of1;
21515 const comdat_type_node *const type_node_2 = (const comdat_type_node *) of2;
21517 return (! memcmp (type_node_1->signature, type_node_2->signature,
21518 DWARF_TYPE_SIGNATURE_SIZE));
21521 /* Move a DW_AT_{,MIPS_}linkage_name attribute just added to dw_die_ref
21522 to the location it would have been added, should we know its
21523 DECL_ASSEMBLER_NAME when we added other attributes. This will
21524 probably improve compactness of debug info, removing equivalent
21525 abbrevs, and hide any differences caused by deferring the
21526 computation of the assembler name, triggered by e.g. PCH. */
21529 move_linkage_attr (dw_die_ref die)
21531 unsigned ix = VEC_length (dw_attr_node, die->die_attr);
21532 dw_attr_node linkage = *VEC_index (dw_attr_node, die->die_attr, ix - 1);
21534 gcc_assert (linkage.dw_attr == DW_AT_linkage_name
21535 || linkage.dw_attr == DW_AT_MIPS_linkage_name);
21539 dw_attr_node *prev = VEC_index (dw_attr_node, die->die_attr, ix - 1);
21541 if (prev->dw_attr == DW_AT_decl_line || prev->dw_attr == DW_AT_name)
21545 if (ix != VEC_length (dw_attr_node, die->die_attr) - 1)
21547 VEC_pop (dw_attr_node, die->die_attr);
21548 VEC_quick_insert (dw_attr_node, die->die_attr, ix, &linkage);
21552 /* Helper function for resolve_addr, mark DW_TAG_base_type nodes
21553 referenced from typed stack ops and count how often they are used. */
21556 mark_base_types (dw_loc_descr_ref loc)
21558 dw_die_ref base_type = NULL;
21560 for (; loc; loc = loc->dw_loc_next)
21562 switch (loc->dw_loc_opc)
21564 case DW_OP_GNU_regval_type:
21565 case DW_OP_GNU_deref_type:
21566 base_type = loc->dw_loc_oprnd2.v.val_die_ref.die;
21568 case DW_OP_GNU_convert:
21569 case DW_OP_GNU_reinterpret:
21570 if (loc->dw_loc_oprnd1.val_class == dw_val_class_unsigned_const)
21573 case DW_OP_GNU_const_type:
21574 base_type = loc->dw_loc_oprnd1.v.val_die_ref.die;
21576 case DW_OP_GNU_entry_value:
21577 mark_base_types (loc->dw_loc_oprnd1.v.val_loc);
21582 gcc_assert (base_type->die_parent == comp_unit_die ());
21583 if (base_type->die_mark)
21584 base_type->die_mark++;
21587 VEC_safe_push (dw_die_ref, heap, base_types, base_type);
21588 base_type->die_mark = 1;
21593 /* Comparison function for sorting marked base types. */
21596 base_type_cmp (const void *x, const void *y)
21598 dw_die_ref dx = *(const dw_die_ref *) x;
21599 dw_die_ref dy = *(const dw_die_ref *) y;
21600 unsigned int byte_size1, byte_size2;
21601 unsigned int encoding1, encoding2;
21602 if (dx->die_mark > dy->die_mark)
21604 if (dx->die_mark < dy->die_mark)
21606 byte_size1 = get_AT_unsigned (dx, DW_AT_byte_size);
21607 byte_size2 = get_AT_unsigned (dy, DW_AT_byte_size);
21608 if (byte_size1 < byte_size2)
21610 if (byte_size1 > byte_size2)
21612 encoding1 = get_AT_unsigned (dx, DW_AT_encoding);
21613 encoding2 = get_AT_unsigned (dy, DW_AT_encoding);
21614 if (encoding1 < encoding2)
21616 if (encoding1 > encoding2)
21621 /* Move base types marked by mark_base_types as early as possible
21622 in the CU, sorted by decreasing usage count both to make the
21623 uleb128 references as small as possible and to make sure they
21624 will have die_offset already computed by calc_die_sizes when
21625 sizes of typed stack loc ops is computed. */
21628 move_marked_base_types (void)
21631 dw_die_ref base_type, die, c;
21633 if (VEC_empty (dw_die_ref, base_types))
21636 /* Sort by decreasing usage count, they will be added again in that
21638 VEC_qsort (dw_die_ref, base_types, base_type_cmp);
21639 die = comp_unit_die ();
21640 c = die->die_child;
21643 dw_die_ref prev = c;
21645 while (c->die_mark)
21647 remove_child_with_prev (c, prev);
21648 /* As base types got marked, there must be at least
21649 one node other than DW_TAG_base_type. */
21650 gcc_assert (c != c->die_sib);
21654 while (c != die->die_child);
21655 gcc_assert (die->die_child);
21656 c = die->die_child;
21657 for (i = 0; VEC_iterate (dw_die_ref, base_types, i, base_type); i++)
21659 base_type->die_mark = 0;
21660 base_type->die_sib = c->die_sib;
21661 c->die_sib = base_type;
21666 /* Helper function for resolve_addr, attempt to resolve
21667 one CONST_STRING, return non-zero if not successful. Similarly verify that
21668 SYMBOL_REFs refer to variables emitted in the current CU. */
21671 resolve_one_addr (rtx *addr, void *data ATTRIBUTE_UNUSED)
21675 if (GET_CODE (rtl) == CONST_STRING)
21677 size_t len = strlen (XSTR (rtl, 0)) + 1;
21678 tree t = build_string (len, XSTR (rtl, 0));
21679 tree tlen = size_int (len - 1);
21681 = build_array_type (char_type_node, build_index_type (tlen));
21682 rtl = lookup_constant_def (t);
21683 if (!rtl || !MEM_P (rtl))
21685 rtl = XEXP (rtl, 0);
21686 VEC_safe_push (rtx, gc, used_rtx_array, rtl);
21691 if (GET_CODE (rtl) == SYMBOL_REF
21692 && SYMBOL_REF_DECL (rtl))
21694 if (TREE_CONSTANT_POOL_ADDRESS_P (rtl))
21696 if (!TREE_ASM_WRITTEN (DECL_INITIAL (SYMBOL_REF_DECL (rtl))))
21699 else if (!TREE_ASM_WRITTEN (SYMBOL_REF_DECL (rtl)))
21703 if (GET_CODE (rtl) == CONST
21704 && for_each_rtx (&XEXP (rtl, 0), resolve_one_addr, NULL))
21710 /* Helper function for resolve_addr, handle one location
21711 expression, return false if at least one CONST_STRING or SYMBOL_REF in
21712 the location list couldn't be resolved. */
21715 resolve_addr_in_expr (dw_loc_descr_ref loc)
21717 dw_loc_descr_ref keep = NULL;
21718 for (; loc; loc = loc->dw_loc_next)
21719 switch (loc->dw_loc_opc)
21722 if (resolve_one_addr (&loc->dw_loc_oprnd1.v.val_addr, NULL))
21725 case DW_OP_const4u:
21726 case DW_OP_const8u:
21728 && resolve_one_addr (&loc->dw_loc_oprnd1.v.val_addr, NULL))
21731 case DW_OP_plus_uconst:
21732 if (size_of_loc_descr (loc)
21733 > size_of_int_loc_descriptor (loc->dw_loc_oprnd1.v.val_unsigned)
21735 && loc->dw_loc_oprnd1.v.val_unsigned > 0)
21737 dw_loc_descr_ref repl
21738 = int_loc_descriptor (loc->dw_loc_oprnd1.v.val_unsigned);
21739 add_loc_descr (&repl, new_loc_descr (DW_OP_plus, 0, 0));
21740 add_loc_descr (&repl, loc->dw_loc_next);
21744 case DW_OP_implicit_value:
21745 if (loc->dw_loc_oprnd2.val_class == dw_val_class_addr
21746 && resolve_one_addr (&loc->dw_loc_oprnd2.v.val_addr, NULL))
21749 case DW_OP_GNU_implicit_pointer:
21750 case DW_OP_GNU_parameter_ref:
21751 if (loc->dw_loc_oprnd1.val_class == dw_val_class_decl_ref)
21754 = lookup_decl_die (loc->dw_loc_oprnd1.v.val_decl_ref);
21757 loc->dw_loc_oprnd1.val_class = dw_val_class_die_ref;
21758 loc->dw_loc_oprnd1.v.val_die_ref.die = ref;
21759 loc->dw_loc_oprnd1.v.val_die_ref.external = 0;
21762 case DW_OP_GNU_const_type:
21763 case DW_OP_GNU_regval_type:
21764 case DW_OP_GNU_deref_type:
21765 case DW_OP_GNU_convert:
21766 case DW_OP_GNU_reinterpret:
21767 while (loc->dw_loc_next
21768 && loc->dw_loc_next->dw_loc_opc == DW_OP_GNU_convert)
21770 dw_die_ref base1, base2;
21771 unsigned enc1, enc2, size1, size2;
21772 if (loc->dw_loc_opc == DW_OP_GNU_regval_type
21773 || loc->dw_loc_opc == DW_OP_GNU_deref_type)
21774 base1 = loc->dw_loc_oprnd2.v.val_die_ref.die;
21775 else if (loc->dw_loc_oprnd1.val_class
21776 == dw_val_class_unsigned_const)
21779 base1 = loc->dw_loc_oprnd1.v.val_die_ref.die;
21780 if (loc->dw_loc_next->dw_loc_oprnd1.val_class
21781 == dw_val_class_unsigned_const)
21783 base2 = loc->dw_loc_next->dw_loc_oprnd1.v.val_die_ref.die;
21784 gcc_assert (base1->die_tag == DW_TAG_base_type
21785 && base2->die_tag == DW_TAG_base_type);
21786 enc1 = get_AT_unsigned (base1, DW_AT_encoding);
21787 enc2 = get_AT_unsigned (base2, DW_AT_encoding);
21788 size1 = get_AT_unsigned (base1, DW_AT_byte_size);
21789 size2 = get_AT_unsigned (base2, DW_AT_byte_size);
21791 && (((enc1 == DW_ATE_unsigned || enc1 == DW_ATE_signed)
21792 && (enc2 == DW_ATE_unsigned || enc2 == DW_ATE_signed)
21796 /* Optimize away next DW_OP_GNU_convert after
21797 adjusting LOC's base type die reference. */
21798 if (loc->dw_loc_opc == DW_OP_GNU_regval_type
21799 || loc->dw_loc_opc == DW_OP_GNU_deref_type)
21800 loc->dw_loc_oprnd2.v.val_die_ref.die = base2;
21802 loc->dw_loc_oprnd1.v.val_die_ref.die = base2;
21803 loc->dw_loc_next = loc->dw_loc_next->dw_loc_next;
21806 /* Don't change integer DW_OP_GNU_convert after e.g. floating
21807 point typed stack entry. */
21808 else if (enc1 != DW_ATE_unsigned && enc1 != DW_ATE_signed)
21809 keep = loc->dw_loc_next;
21819 /* Resolve DW_OP_addr and DW_AT_const_value CONST_STRING arguments to
21820 an address in .rodata section if the string literal is emitted there,
21821 or remove the containing location list or replace DW_AT_const_value
21822 with DW_AT_location and empty location expression, if it isn't found
21823 in .rodata. Similarly for SYMBOL_REFs, keep only those that refer
21824 to something that has been emitted in the current CU. */
21827 resolve_addr (dw_die_ref die)
21831 dw_loc_list_ref *curr, *start, loc;
21834 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
21835 switch (AT_class (a))
21837 case dw_val_class_loc_list:
21838 start = curr = AT_loc_list_ptr (a);
21841 /* The same list can be referenced more than once. See if we have
21842 already recorded the result from a previous pass. */
21844 *curr = loc->dw_loc_next;
21845 else if (!loc->resolved_addr)
21847 /* As things stand, we do not expect or allow one die to
21848 reference a suffix of another die's location list chain.
21849 References must be identical or completely separate.
21850 There is therefore no need to cache the result of this
21851 pass on any list other than the first; doing so
21852 would lead to unnecessary writes. */
21855 gcc_assert (!(*curr)->replaced && !(*curr)->resolved_addr);
21856 if (!resolve_addr_in_expr ((*curr)->expr))
21858 dw_loc_list_ref next = (*curr)->dw_loc_next;
21859 if (next && (*curr)->ll_symbol)
21861 gcc_assert (!next->ll_symbol);
21862 next->ll_symbol = (*curr)->ll_symbol;
21868 mark_base_types ((*curr)->expr);
21869 curr = &(*curr)->dw_loc_next;
21873 loc->resolved_addr = 1;
21877 loc->dw_loc_next = *start;
21882 remove_AT (die, a->dw_attr);
21886 case dw_val_class_loc:
21888 dw_loc_descr_ref l = AT_loc (a);
21889 /* For -gdwarf-2 don't attempt to optimize
21890 DW_AT_data_member_location containing
21891 DW_OP_plus_uconst - older consumers might
21892 rely on it being that op instead of a more complex,
21893 but shorter, location description. */
21894 if ((dwarf_version > 2
21895 || a->dw_attr != DW_AT_data_member_location
21897 || l->dw_loc_opc != DW_OP_plus_uconst
21898 || l->dw_loc_next != NULL)
21899 && !resolve_addr_in_expr (l))
21901 remove_AT (die, a->dw_attr);
21905 mark_base_types (l);
21908 case dw_val_class_addr:
21909 if (a->dw_attr == DW_AT_const_value
21910 && resolve_one_addr (&a->dw_attr_val.v.val_addr, NULL))
21912 remove_AT (die, a->dw_attr);
21915 if (die->die_tag == DW_TAG_GNU_call_site
21916 && a->dw_attr == DW_AT_abstract_origin)
21918 tree tdecl = SYMBOL_REF_DECL (a->dw_attr_val.v.val_addr);
21919 dw_die_ref tdie = lookup_decl_die (tdecl);
21921 && DECL_EXTERNAL (tdecl)
21922 && DECL_ABSTRACT_ORIGIN (tdecl) == NULL_TREE)
21924 force_decl_die (tdecl);
21925 tdie = lookup_decl_die (tdecl);
21929 a->dw_attr_val.val_class = dw_val_class_die_ref;
21930 a->dw_attr_val.v.val_die_ref.die = tdie;
21931 a->dw_attr_val.v.val_die_ref.external = 0;
21935 remove_AT (die, a->dw_attr);
21944 FOR_EACH_CHILD (die, c, resolve_addr (c));
21947 /* Helper routines for optimize_location_lists.
21948 This pass tries to share identical local lists in .debug_loc
21951 /* Iteratively hash operands of LOC opcode. */
21953 static inline hashval_t
21954 hash_loc_operands (dw_loc_descr_ref loc, hashval_t hash)
21956 dw_val_ref val1 = &loc->dw_loc_oprnd1;
21957 dw_val_ref val2 = &loc->dw_loc_oprnd2;
21959 switch (loc->dw_loc_opc)
21961 case DW_OP_const4u:
21962 case DW_OP_const8u:
21966 case DW_OP_const1u:
21967 case DW_OP_const1s:
21968 case DW_OP_const2u:
21969 case DW_OP_const2s:
21970 case DW_OP_const4s:
21971 case DW_OP_const8s:
21975 case DW_OP_plus_uconst:
22011 case DW_OP_deref_size:
22012 case DW_OP_xderef_size:
22013 hash = iterative_hash_object (val1->v.val_int, hash);
22020 gcc_assert (val1->val_class == dw_val_class_loc);
22021 offset = val1->v.val_loc->dw_loc_addr - (loc->dw_loc_addr + 3);
22022 hash = iterative_hash_object (offset, hash);
22025 case DW_OP_implicit_value:
22026 hash = iterative_hash_object (val1->v.val_unsigned, hash);
22027 switch (val2->val_class)
22029 case dw_val_class_const:
22030 hash = iterative_hash_object (val2->v.val_int, hash);
22032 case dw_val_class_vec:
22034 unsigned int elt_size = val2->v.val_vec.elt_size;
22035 unsigned int len = val2->v.val_vec.length;
22037 hash = iterative_hash_object (elt_size, hash);
22038 hash = iterative_hash_object (len, hash);
22039 hash = iterative_hash (val2->v.val_vec.array,
22040 len * elt_size, hash);
22043 case dw_val_class_const_double:
22044 hash = iterative_hash_object (val2->v.val_double.low, hash);
22045 hash = iterative_hash_object (val2->v.val_double.high, hash);
22047 case dw_val_class_addr:
22048 hash = iterative_hash_rtx (val2->v.val_addr, hash);
22051 gcc_unreachable ();
22055 case DW_OP_bit_piece:
22056 hash = iterative_hash_object (val1->v.val_int, hash);
22057 hash = iterative_hash_object (val2->v.val_int, hash);
22063 unsigned char dtprel = 0xd1;
22064 hash = iterative_hash_object (dtprel, hash);
22066 hash = iterative_hash_rtx (val1->v.val_addr, hash);
22068 case DW_OP_GNU_implicit_pointer:
22069 hash = iterative_hash_object (val2->v.val_int, hash);
22071 case DW_OP_GNU_entry_value:
22072 hash = hash_loc_operands (val1->v.val_loc, hash);
22074 case DW_OP_GNU_regval_type:
22075 case DW_OP_GNU_deref_type:
22077 unsigned int byte_size
22078 = get_AT_unsigned (val2->v.val_die_ref.die, DW_AT_byte_size);
22079 unsigned int encoding
22080 = get_AT_unsigned (val2->v.val_die_ref.die, DW_AT_encoding);
22081 hash = iterative_hash_object (val1->v.val_int, hash);
22082 hash = iterative_hash_object (byte_size, hash);
22083 hash = iterative_hash_object (encoding, hash);
22086 case DW_OP_GNU_convert:
22087 case DW_OP_GNU_reinterpret:
22088 if (val1->val_class == dw_val_class_unsigned_const)
22090 hash = iterative_hash_object (val1->v.val_unsigned, hash);
22094 case DW_OP_GNU_const_type:
22096 unsigned int byte_size
22097 = get_AT_unsigned (val1->v.val_die_ref.die, DW_AT_byte_size);
22098 unsigned int encoding
22099 = get_AT_unsigned (val1->v.val_die_ref.die, DW_AT_encoding);
22100 hash = iterative_hash_object (byte_size, hash);
22101 hash = iterative_hash_object (encoding, hash);
22102 if (loc->dw_loc_opc != DW_OP_GNU_const_type)
22104 hash = iterative_hash_object (val2->val_class, hash);
22105 switch (val2->val_class)
22107 case dw_val_class_const:
22108 hash = iterative_hash_object (val2->v.val_int, hash);
22110 case dw_val_class_vec:
22112 unsigned int elt_size = val2->v.val_vec.elt_size;
22113 unsigned int len = val2->v.val_vec.length;
22115 hash = iterative_hash_object (elt_size, hash);
22116 hash = iterative_hash_object (len, hash);
22117 hash = iterative_hash (val2->v.val_vec.array,
22118 len * elt_size, hash);
22121 case dw_val_class_const_double:
22122 hash = iterative_hash_object (val2->v.val_double.low, hash);
22123 hash = iterative_hash_object (val2->v.val_double.high, hash);
22126 gcc_unreachable ();
22132 /* Other codes have no operands. */
22138 /* Iteratively hash the whole DWARF location expression LOC. */
22140 static inline hashval_t
22141 hash_locs (dw_loc_descr_ref loc, hashval_t hash)
22143 dw_loc_descr_ref l;
22144 bool sizes_computed = false;
22145 /* Compute sizes, so that DW_OP_skip/DW_OP_bra can be checksummed. */
22146 size_of_locs (loc);
22148 for (l = loc; l != NULL; l = l->dw_loc_next)
22150 enum dwarf_location_atom opc = l->dw_loc_opc;
22151 hash = iterative_hash_object (opc, hash);
22152 if ((opc == DW_OP_skip || opc == DW_OP_bra) && !sizes_computed)
22154 size_of_locs (loc);
22155 sizes_computed = true;
22157 hash = hash_loc_operands (l, hash);
22162 /* Compute hash of the whole location list LIST_HEAD. */
22165 hash_loc_list (dw_loc_list_ref list_head)
22167 dw_loc_list_ref curr = list_head;
22168 hashval_t hash = 0;
22170 for (curr = list_head; curr != NULL; curr = curr->dw_loc_next)
22172 hash = iterative_hash (curr->begin, strlen (curr->begin) + 1, hash);
22173 hash = iterative_hash (curr->end, strlen (curr->end) + 1, hash);
22175 hash = iterative_hash (curr->section, strlen (curr->section) + 1,
22177 hash = hash_locs (curr->expr, hash);
22179 list_head->hash = hash;
22182 /* Return true if X and Y opcodes have the same operands. */
22185 compare_loc_operands (dw_loc_descr_ref x, dw_loc_descr_ref y)
22187 dw_val_ref valx1 = &x->dw_loc_oprnd1;
22188 dw_val_ref valx2 = &x->dw_loc_oprnd2;
22189 dw_val_ref valy1 = &y->dw_loc_oprnd1;
22190 dw_val_ref valy2 = &y->dw_loc_oprnd2;
22192 switch (x->dw_loc_opc)
22194 case DW_OP_const4u:
22195 case DW_OP_const8u:
22199 case DW_OP_const1u:
22200 case DW_OP_const1s:
22201 case DW_OP_const2u:
22202 case DW_OP_const2s:
22203 case DW_OP_const4s:
22204 case DW_OP_const8s:
22208 case DW_OP_plus_uconst:
22244 case DW_OP_deref_size:
22245 case DW_OP_xderef_size:
22246 return valx1->v.val_int == valy1->v.val_int;
22249 gcc_assert (valx1->val_class == dw_val_class_loc
22250 && valy1->val_class == dw_val_class_loc
22251 && x->dw_loc_addr == y->dw_loc_addr);
22252 return valx1->v.val_loc->dw_loc_addr == valy1->v.val_loc->dw_loc_addr;
22253 case DW_OP_implicit_value:
22254 if (valx1->v.val_unsigned != valy1->v.val_unsigned
22255 || valx2->val_class != valy2->val_class)
22257 switch (valx2->val_class)
22259 case dw_val_class_const:
22260 return valx2->v.val_int == valy2->v.val_int;
22261 case dw_val_class_vec:
22262 return valx2->v.val_vec.elt_size == valy2->v.val_vec.elt_size
22263 && valx2->v.val_vec.length == valy2->v.val_vec.length
22264 && memcmp (valx2->v.val_vec.array, valy2->v.val_vec.array,
22265 valx2->v.val_vec.elt_size
22266 * valx2->v.val_vec.length) == 0;
22267 case dw_val_class_const_double:
22268 return valx2->v.val_double.low == valy2->v.val_double.low
22269 && valx2->v.val_double.high == valy2->v.val_double.high;
22270 case dw_val_class_addr:
22271 return rtx_equal_p (valx2->v.val_addr, valy2->v.val_addr);
22273 gcc_unreachable ();
22276 case DW_OP_bit_piece:
22277 return valx1->v.val_int == valy1->v.val_int
22278 && valx2->v.val_int == valy2->v.val_int;
22281 return rtx_equal_p (valx1->v.val_addr, valy1->v.val_addr);
22282 case DW_OP_GNU_implicit_pointer:
22283 return valx1->val_class == dw_val_class_die_ref
22284 && valx1->val_class == valy1->val_class
22285 && valx1->v.val_die_ref.die == valy1->v.val_die_ref.die
22286 && valx2->v.val_int == valy2->v.val_int;
22287 case DW_OP_GNU_entry_value:
22288 return compare_loc_operands (valx1->v.val_loc, valy1->v.val_loc);
22289 case DW_OP_GNU_const_type:
22290 if (valx1->v.val_die_ref.die != valy1->v.val_die_ref.die
22291 || valx2->val_class != valy2->val_class)
22293 switch (valx2->val_class)
22295 case dw_val_class_const:
22296 return valx2->v.val_int == valy2->v.val_int;
22297 case dw_val_class_vec:
22298 return valx2->v.val_vec.elt_size == valy2->v.val_vec.elt_size
22299 && valx2->v.val_vec.length == valy2->v.val_vec.length
22300 && memcmp (valx2->v.val_vec.array, valy2->v.val_vec.array,
22301 valx2->v.val_vec.elt_size
22302 * valx2->v.val_vec.length) == 0;
22303 case dw_val_class_const_double:
22304 return valx2->v.val_double.low == valy2->v.val_double.low
22305 && valx2->v.val_double.high == valy2->v.val_double.high;
22307 gcc_unreachable ();
22309 case DW_OP_GNU_regval_type:
22310 case DW_OP_GNU_deref_type:
22311 return valx1->v.val_int == valy1->v.val_int
22312 && valx2->v.val_die_ref.die == valy2->v.val_die_ref.die;
22313 case DW_OP_GNU_convert:
22314 case DW_OP_GNU_reinterpret:
22315 if (valx1->val_class != valy1->val_class)
22317 if (valx1->val_class == dw_val_class_unsigned_const)
22318 return valx1->v.val_unsigned == valy1->v.val_unsigned;
22319 return valx1->v.val_die_ref.die == valy1->v.val_die_ref.die;
22320 case DW_OP_GNU_parameter_ref:
22321 return valx1->val_class == dw_val_class_die_ref
22322 && valx1->val_class == valy1->val_class
22323 && valx1->v.val_die_ref.die == valy1->v.val_die_ref.die;
22325 /* Other codes have no operands. */
22330 /* Return true if DWARF location expressions X and Y are the same. */
22333 compare_locs (dw_loc_descr_ref x, dw_loc_descr_ref y)
22335 for (; x != NULL && y != NULL; x = x->dw_loc_next, y = y->dw_loc_next)
22336 if (x->dw_loc_opc != y->dw_loc_opc
22337 || x->dtprel != y->dtprel
22338 || !compare_loc_operands (x, y))
22340 return x == NULL && y == NULL;
22343 /* Return precomputed hash of location list X. */
22346 loc_list_hash (const void *x)
22348 return ((const struct dw_loc_list_struct *) x)->hash;
22351 /* Return 1 if location lists X and Y are the same. */
22354 loc_list_eq (const void *x, const void *y)
22356 const struct dw_loc_list_struct *a = (const struct dw_loc_list_struct *) x;
22357 const struct dw_loc_list_struct *b = (const struct dw_loc_list_struct *) y;
22360 if (a->hash != b->hash)
22362 for (; a != NULL && b != NULL; a = a->dw_loc_next, b = b->dw_loc_next)
22363 if (strcmp (a->begin, b->begin) != 0
22364 || strcmp (a->end, b->end) != 0
22365 || (a->section == NULL) != (b->section == NULL)
22366 || (a->section && strcmp (a->section, b->section) != 0)
22367 || !compare_locs (a->expr, b->expr))
22369 return a == NULL && b == NULL;
22372 /* Recursively optimize location lists referenced from DIE
22373 children and share them whenever possible. */
22376 optimize_location_lists_1 (dw_die_ref die, htab_t htab)
22383 FOR_EACH_VEC_ELT (dw_attr_node, die->die_attr, ix, a)
22384 if (AT_class (a) == dw_val_class_loc_list)
22386 dw_loc_list_ref list = AT_loc_list (a);
22387 /* TODO: perform some optimizations here, before hashing
22388 it and storing into the hash table. */
22389 hash_loc_list (list);
22390 slot = htab_find_slot_with_hash (htab, list, list->hash,
22393 *slot = (void *) list;
22395 a->dw_attr_val.v.val_loc_list = (dw_loc_list_ref) *slot;
22398 FOR_EACH_CHILD (die, c, optimize_location_lists_1 (c, htab));
22401 /* Optimize location lists referenced from DIE
22402 children and share them whenever possible. */
22405 optimize_location_lists (dw_die_ref die)
22407 htab_t htab = htab_create (500, loc_list_hash, loc_list_eq, NULL);
22408 optimize_location_lists_1 (die, htab);
22409 htab_delete (htab);
22412 /* Output stuff that dwarf requires at the end of every file,
22413 and generate the DWARF-2 debugging info. */
22416 dwarf2out_finish (const char *filename)
22418 limbo_die_node *node, *next_node;
22419 comdat_type_node *ctnode;
22420 htab_t comdat_type_table;
22423 /* PCH might result in DW_AT_producer string being restored from the
22424 header compilation, fix it up if needed. */
22425 dw_attr_ref producer = get_AT (comp_unit_die (), DW_AT_producer);
22426 if (strcmp (AT_string (producer), producer_string) != 0)
22428 struct indirect_string_node *node = find_AT_string (producer_string);
22429 producer->dw_attr_val.v.val_str = node;
22432 gen_scheduled_generic_parms_dies ();
22433 gen_remaining_tmpl_value_param_die_attribute ();
22435 /* Add the name for the main input file now. We delayed this from
22436 dwarf2out_init to avoid complications with PCH. */
22437 add_name_attribute (comp_unit_die (), remap_debug_filename (filename));
22438 if (!IS_ABSOLUTE_PATH (filename))
22439 add_comp_dir_attribute (comp_unit_die ());
22440 else if (get_AT (comp_unit_die (), DW_AT_comp_dir) == NULL)
22443 htab_traverse (file_table, file_table_relative_p, &p);
22445 add_comp_dir_attribute (comp_unit_die ());
22448 for (i = 0; i < VEC_length (deferred_locations, deferred_locations_list); i++)
22450 add_location_or_const_value_attribute (
22451 VEC_index (deferred_locations, deferred_locations_list, i)->die,
22452 VEC_index (deferred_locations, deferred_locations_list, i)->variable,
22457 /* Traverse the limbo die list, and add parent/child links. The only
22458 dies without parents that should be here are concrete instances of
22459 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
22460 For concrete instances, we can get the parent die from the abstract
22462 for (node = limbo_die_list; node; node = next_node)
22464 dw_die_ref die = node->die;
22465 next_node = node->next;
22467 if (die->die_parent == NULL)
22469 dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin);
22471 if (origin && origin->die_parent)
22472 add_child_die (origin->die_parent, die);
22473 else if (is_cu_die (die))
22475 else if (seen_error ())
22476 /* It's OK to be confused by errors in the input. */
22477 add_child_die (comp_unit_die (), die);
22480 /* In certain situations, the lexical block containing a
22481 nested function can be optimized away, which results
22482 in the nested function die being orphaned. Likewise
22483 with the return type of that nested function. Force
22484 this to be a child of the containing function.
22486 It may happen that even the containing function got fully
22487 inlined and optimized out. In that case we are lost and
22488 assign the empty child. This should not be big issue as
22489 the function is likely unreachable too. */
22490 tree context = NULL_TREE;
22492 gcc_assert (node->created_for);
22494 if (DECL_P (node->created_for))
22495 context = DECL_CONTEXT (node->created_for);
22496 else if (TYPE_P (node->created_for))
22497 context = TYPE_CONTEXT (node->created_for);
22499 gcc_assert (context
22500 && (TREE_CODE (context) == FUNCTION_DECL
22501 || TREE_CODE (context) == NAMESPACE_DECL));
22503 origin = lookup_decl_die (context);
22505 add_child_die (origin, die);
22507 add_child_die (comp_unit_die (), die);
22512 limbo_die_list = NULL;
22514 #if ENABLE_ASSERT_CHECKING
22516 dw_die_ref die = comp_unit_die (), c;
22517 FOR_EACH_CHILD (die, c, gcc_assert (! c->die_mark));
22520 resolve_addr (comp_unit_die ());
22521 move_marked_base_types ();
22523 for (node = deferred_asm_name; node; node = node->next)
22525 tree decl = node->created_for;
22526 if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
22528 add_linkage_attr (node->die, decl);
22529 move_linkage_attr (node->die);
22533 deferred_asm_name = NULL;
22535 /* Walk through the list of incomplete types again, trying once more to
22536 emit full debugging info for them. */
22537 retry_incomplete_types ();
22539 if (flag_eliminate_unused_debug_types)
22540 prune_unused_types ();
22542 /* Generate separate CUs for each of the include files we've seen.
22543 They will go into limbo_die_list. */
22544 if (flag_eliminate_dwarf2_dups && ! use_debug_types)
22545 break_out_includes (comp_unit_die ());
22547 /* Generate separate COMDAT sections for type DIEs. */
22548 if (use_debug_types)
22550 break_out_comdat_types (comp_unit_die ());
22552 /* Each new type_unit DIE was added to the limbo die list when created.
22553 Since these have all been added to comdat_type_list, clear the
22555 limbo_die_list = NULL;
22557 /* For each new comdat type unit, copy declarations for incomplete
22558 types to make the new unit self-contained (i.e., no direct
22559 references to the main compile unit). */
22560 for (ctnode = comdat_type_list; ctnode != NULL; ctnode = ctnode->next)
22561 copy_decls_for_unworthy_types (ctnode->root_die);
22562 copy_decls_for_unworthy_types (comp_unit_die ());
22564 /* In the process of copying declarations from one unit to another,
22565 we may have left some declarations behind that are no longer
22566 referenced. Prune them. */
22567 prune_unused_types ();
22570 /* Traverse the DIE's and add add sibling attributes to those DIE's
22571 that have children. */
22572 add_sibling_attributes (comp_unit_die ());
22573 for (node = limbo_die_list; node; node = node->next)
22574 add_sibling_attributes (node->die);
22575 for (ctnode = comdat_type_list; ctnode != NULL; ctnode = ctnode->next)
22576 add_sibling_attributes (ctnode->root_die);
22578 /* Output a terminator label for the .text section. */
22579 switch_to_section (text_section);
22580 targetm.asm_out.internal_label (asm_out_file, TEXT_END_LABEL, 0);
22581 if (cold_text_section)
22583 switch_to_section (cold_text_section);
22584 targetm.asm_out.internal_label (asm_out_file, COLD_END_LABEL, 0);
22587 /* We can only use the low/high_pc attributes if all of the code was
22589 if (!have_multiple_function_sections
22590 || (dwarf_version < 3 && dwarf_strict))
22592 /* Don't add if the CU has no associated code. */
22593 if (text_section_used)
22595 add_AT_lbl_id (comp_unit_die (), DW_AT_low_pc, text_section_label);
22596 add_AT_lbl_id (comp_unit_die (), DW_AT_high_pc, text_end_label);
22603 bool range_list_added = false;
22605 if (text_section_used)
22606 add_ranges_by_labels (comp_unit_die (), text_section_label,
22607 text_end_label, &range_list_added);
22608 if (cold_text_section_used)
22609 add_ranges_by_labels (comp_unit_die (), cold_text_section_label,
22610 cold_end_label, &range_list_added);
22612 FOR_EACH_VEC_ELT (dw_fde_ref, fde_vec, fde_idx, fde)
22614 if (!fde->in_std_section)
22615 add_ranges_by_labels (comp_unit_die (), fde->dw_fde_begin,
22616 fde->dw_fde_end, &range_list_added);
22617 if (fde->dw_fde_second_begin && !fde->second_in_std_section)
22618 add_ranges_by_labels (comp_unit_die (), fde->dw_fde_second_begin,
22619 fde->dw_fde_second_end, &range_list_added);
22622 if (range_list_added)
22624 /* We need to give .debug_loc and .debug_ranges an appropriate
22625 "base address". Use zero so that these addresses become
22626 absolute. Historically, we've emitted the unexpected
22627 DW_AT_entry_pc instead of DW_AT_low_pc for this purpose.
22628 Emit both to give time for other tools to adapt. */
22629 add_AT_addr (comp_unit_die (), DW_AT_low_pc, const0_rtx);
22630 if (! dwarf_strict && dwarf_version < 4)
22631 add_AT_addr (comp_unit_die (), DW_AT_entry_pc, const0_rtx);
22637 if (debug_info_level >= DINFO_LEVEL_NORMAL)
22638 add_AT_lineptr (comp_unit_die (), DW_AT_stmt_list,
22639 debug_line_section_label);
22641 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
22642 add_AT_macptr (comp_unit_die (),
22643 dwarf_strict ? DW_AT_macro_info : DW_AT_GNU_macros,
22644 macinfo_section_label);
22646 if (have_location_lists)
22647 optimize_location_lists (comp_unit_die ());
22649 /* Output all of the compilation units. We put the main one last so that
22650 the offsets are available to output_pubnames. */
22651 for (node = limbo_die_list; node; node = node->next)
22652 output_comp_unit (node->die, 0);
22654 comdat_type_table = htab_create (100, htab_ct_hash, htab_ct_eq, NULL);
22655 for (ctnode = comdat_type_list; ctnode != NULL; ctnode = ctnode->next)
22657 void **slot = htab_find_slot (comdat_type_table, ctnode, INSERT);
22659 /* Don't output duplicate types. */
22660 if (*slot != HTAB_EMPTY_ENTRY)
22663 /* Add a pointer to the line table for the main compilation unit
22664 so that the debugger can make sense of DW_AT_decl_file
22666 if (debug_info_level >= DINFO_LEVEL_NORMAL)
22667 add_AT_lineptr (ctnode->root_die, DW_AT_stmt_list,
22668 debug_line_section_label);
22670 output_comdat_type_unit (ctnode);
22673 htab_delete (comdat_type_table);
22675 /* Output the main compilation unit if non-empty or if .debug_macinfo
22676 will be emitted. */
22677 output_comp_unit (comp_unit_die (), debug_info_level >= DINFO_LEVEL_VERBOSE);
22679 /* Output the abbreviation table. */
22680 if (abbrev_die_table_in_use != 1)
22682 switch_to_section (debug_abbrev_section);
22683 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
22684 output_abbrev_section ();
22687 /* Output location list section if necessary. */
22688 if (have_location_lists)
22690 /* Output the location lists info. */
22691 switch_to_section (debug_loc_section);
22692 ASM_GENERATE_INTERNAL_LABEL (loc_section_label,
22693 DEBUG_LOC_SECTION_LABEL, 0);
22694 ASM_OUTPUT_LABEL (asm_out_file, loc_section_label);
22695 output_location_lists (comp_unit_die ());
22698 /* Output public names table if necessary. */
22699 if (!VEC_empty (pubname_entry, pubname_table))
22701 gcc_assert (info_section_emitted);
22702 switch_to_section (debug_pubnames_section);
22703 output_pubnames (pubname_table);
22706 /* Output public types table if necessary. */
22707 /* ??? Only defined by DWARF3, but emitted by Darwin for DWARF2.
22708 It shouldn't hurt to emit it always, since pure DWARF2 consumers
22709 simply won't look for the section. */
22710 if (!VEC_empty (pubname_entry, pubtype_table))
22712 bool empty = false;
22714 if (flag_eliminate_unused_debug_types)
22716 /* The pubtypes table might be emptied by pruning unused items. */
22720 FOR_EACH_VEC_ELT (pubname_entry, pubtype_table, i, p)
22721 if (p->die->die_offset != 0)
22729 gcc_assert (info_section_emitted);
22730 switch_to_section (debug_pubtypes_section);
22731 output_pubnames (pubtype_table);
22735 /* Output the address range information if a CU (.debug_info section)
22736 was emitted. We output an empty table even if we had no functions
22737 to put in it. This because the consumer has no way to tell the
22738 difference between an empty table that we omitted and failure to
22739 generate a table that would have contained data. */
22740 if (info_section_emitted)
22742 unsigned long aranges_length = size_of_aranges ();
22744 switch_to_section (debug_aranges_section);
22745 output_aranges (aranges_length);
22748 /* Output ranges section if necessary. */
22749 if (ranges_table_in_use)
22751 switch_to_section (debug_ranges_section);
22752 ASM_OUTPUT_LABEL (asm_out_file, ranges_section_label);
22756 /* Have to end the macro section. */
22757 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
22759 switch_to_section (debug_macinfo_section);
22760 ASM_OUTPUT_LABEL (asm_out_file, macinfo_section_label);
22761 if (!VEC_empty (macinfo_entry, macinfo_table))
22763 dw2_asm_output_data (1, 0, "End compilation unit");
22766 /* Output the source line correspondence table. We must do this
22767 even if there is no line information. Otherwise, on an empty
22768 translation unit, we will generate a present, but empty,
22769 .debug_info section. IRIX 6.5 `nm' will then complain when
22770 examining the file. This is done late so that any filenames
22771 used by the debug_info section are marked as 'used'. */
22772 switch_to_section (debug_line_section);
22773 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
22774 if (! DWARF2_ASM_LINE_DEBUG_INFO)
22775 output_line_info ();
22777 /* If we emitted any DW_FORM_strp form attribute, output the string
22779 if (debug_str_hash)
22780 htab_traverse (debug_str_hash, output_indirect_string, NULL);
22783 #include "gt-dwarf2out.h"