1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
4 2011 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
29 #include "coretypes.h"
34 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
39 #include "insn-attr.h"
40 #include "insn-config.h"
41 #include "insn-flags.h"
42 #include "hard-reg-set.h"
49 #include "basic-block.h"
55 #include "diagnostic.h"
56 #include "tree-diagnostic.h"
57 #include "tree-pretty-print.h"
61 #include "dwarf2asm.h"
62 #include "integrate.h"
65 #include "common/common-target.h"
66 #include "langhooks.h"
67 #include "cfglayout.h"
69 #include "hosthooks.h"
72 #include "opts-diagnostic.h"
74 #include "value-prof.h"
75 #include "alloc-pool.h"
76 #include "tree-mudflap.h"
77 #include "tree-pass.h"
79 #include "tree-ssa-alias.h"
82 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
83 #include "dwarf2out.h"
86 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
90 #ifdef SDB_DEBUGGING_INFO
94 #ifdef XCOFF_DEBUGGING_INFO
95 #include "xcoffout.h" /* Needed for external data
96 declarations for e.g. AIX 4.x. */
99 static void general_init (const char *);
100 static void do_compile (void);
101 static void process_options (void);
102 static void backend_init (void);
103 static int lang_dependent_init (const char *);
104 static void init_asm_output (const char *);
105 static void finalize (bool);
107 static void crash_signal (int) ATTRIBUTE_NORETURN;
108 static void compile_file (void);
110 /* True if we don't need a backend (e.g. preprocessing only). */
111 static bool no_backend;
113 /* Length of line when printing switch values. */
116 /* Decoded options, and number of such options. */
117 struct cl_decoded_option *save_decoded_options;
118 unsigned int save_decoded_options_count;
120 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
121 to optimize in process_options (). */
122 #define AUTODETECT_VALUE 2
124 /* Debug hooks - dependent upon command line options. */
126 const struct gcc_debug_hooks *debug_hooks;
128 /* True if this is the lto front end. This is used to disable
129 gimple generation and lowering passes that are normally run on the
130 output of a front end. These passes must be bypassed for lto since
131 they have already been done before the gimple was written. */
133 bool in_lto_p = false;
135 /* The FUNCTION_DECL for the function currently being compiled,
136 or 0 if between functions. */
137 tree current_function_decl;
139 /* Set to the FUNC_BEGIN label of the current function, or NULL
141 const char * current_function_func_begin_label;
143 /* A random sequence of characters, unless overridden by user. */
144 static const char *flag_random_seed;
146 /* A local time stamp derived from the time of compilation. It will be
147 zero if the system cannot provide a time. It will be -1u, if the
148 user has specified a particular random seed. */
153 /* Generate code for GNU or NeXT Objective-C runtime environment. */
155 #ifdef NEXT_OBJC_RUNTIME
156 int flag_next_runtime = 1;
158 int flag_next_runtime = 0;
161 /* Nonzero means make permerror produce warnings instead of errors. */
163 int flag_permissive = 0;
165 /* When non-NULL, indicates that whenever space is allocated on the
166 stack, the resulting stack pointer must not pass this
167 address---that is, for stacks that grow downward, the stack pointer
168 must always be greater than or equal to this address; for stacks
169 that grow upward, the stack pointer must be less than this address.
170 At present, the rtx may be either a REG or a SYMBOL_REF, although
171 the support provided depends on the backend. */
174 /* True if the user has tagged the function with the 'section'
177 bool user_defined_section_attribute = false;
179 struct target_flag_state default_target_flag_state;
180 #if SWITCHABLE_TARGET
181 struct target_flag_state *this_target_flag_state = &default_target_flag_state;
183 #define this_target_flag_state (&default_target_flag_state)
186 /* The user symbol prefix after having resolved same. */
187 const char *user_label_prefix;
189 /* Output files for assembler code (real compiler output)
190 and debugging dumps. */
194 FILE *stack_usage_file = NULL;
195 FILE *dump_file = NULL;
196 const char *dump_file_name;
198 /* The current working directory of a translation. It's generally the
199 directory from which compilation was initiated, but a preprocessed
200 file may specify the original directory in which it was
203 static const char *src_pwd;
205 /* Initialize src_pwd with the given string, and return true. If it
206 was already initialized, return false. As a special case, it may
207 be called with a NULL argument to test whether src_pwd has NOT been
211 set_src_pwd (const char *pwd)
215 if (strcmp (src_pwd, pwd) == 0)
221 src_pwd = xstrdup (pwd);
225 /* Return the directory from which the translation unit was initiated,
226 in case set_src_pwd() was not called before to assign it a
242 /* Called when the start of a function definition is parsed,
243 this function prints on stderr the name of the function. */
245 announce_function (tree decl)
249 if (rtl_dump_and_exit)
250 fprintf (stderr, "%s ",
251 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
253 fprintf (stderr, " %s",
254 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
256 pp_needs_newline (global_dc->printer) = true;
257 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
261 /* Initialize local_tick with the time of day, or -1 if
262 flag_random_seed is set. */
265 init_local_tick (void)
267 if (!flag_random_seed)
269 /* Get some more or less random data. */
270 #ifdef HAVE_GETTIMEOFDAY
274 gettimeofday (&tv, NULL);
275 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
279 time_t now = time (NULL);
281 if (now != (time_t)-1)
282 local_tick = (unsigned) now;
290 /* Set up a default flag_random_seed and local_tick, unless the user
291 already specified one. Must be called after init_local_tick. */
294 init_random_seed (void)
296 unsigned HOST_WIDE_INT value;
297 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
299 value = local_tick ^ getpid ();
301 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
302 flag_random_seed = random_seed;
305 /* Obtain the random_seed string. Unless NOINIT, initialize it if
306 it's not provided in the command line. */
309 get_random_seed (bool noinit)
311 if (!flag_random_seed && !noinit)
313 return flag_random_seed;
316 /* Modify the random_seed string to VAL. Return its previous
320 set_random_seed (const char *val)
322 const char *old = flag_random_seed;
323 flag_random_seed = val;
327 /* Handler for fatal signals, such as SIGSEGV. These are transformed
328 into ICE messages, which is much more user friendly. In case the
329 error printer crashes, reset the signal to prevent infinite recursion. */
332 crash_signal (int signo)
334 signal (signo, SIG_DFL);
336 /* If we crashed while processing an ASM statement, then be a little more
337 graceful. It's most likely the user's fault. */
338 if (this_is_asm_operands)
340 output_operand_lossage ("unrecoverable error");
341 exit (FATAL_EXIT_CODE);
344 internal_error ("%s", strsignal (signo));
347 /* A subroutine of wrapup_global_declarations. We've come to the end of
348 the compilation unit. All deferred variables should be undeferred,
349 and all incomplete decls should be finalized. */
352 wrapup_global_declaration_1 (tree decl)
354 /* We're not deferring this any longer. Assignment is conditional to
355 avoid needlessly dirtying PCH pages. */
356 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
357 && DECL_DEFER_OUTPUT (decl) != 0)
358 DECL_DEFER_OUTPUT (decl) = 0;
360 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
361 lang_hooks.finish_incomplete_decl (decl);
364 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
365 needs to be output. Return true if it is output. */
368 wrapup_global_declaration_2 (tree decl)
370 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
373 /* Don't write out static consts, unless we still need them.
375 We also keep static consts if not optimizing (for debugging),
376 unless the user specified -fno-keep-static-consts.
377 ??? They might be better written into the debug information.
378 This is possible when using DWARF.
380 A language processor that wants static constants to be always
381 written out (even if it is not used) is responsible for
382 calling rest_of_decl_compilation itself. E.g. the C front-end
383 calls rest_of_decl_compilation from finish_decl.
384 One motivation for this is that is conventional in some
385 environments to write things like:
386 static const char rcsid[] = "... version string ...";
387 intending to force the string to be in the executable.
389 A language processor that would prefer to have unneeded
390 static constants "optimized away" would just defer writing
391 them out until here. E.g. C++ does this, because static
392 constants are often defined in header files.
394 ??? A tempting alternative (for both C and C++) would be
395 to force a constant to be written if and only if it is
396 defined in a main file, as opposed to an include file. */
398 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
400 struct varpool_node *node;
402 node = varpool_get_node (decl);
404 if (!node && flag_ltrans)
406 else if (node && node->finalized)
408 else if (node && node->alias)
410 else if (!cgraph_global_info_ready
412 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
414 else if (node && node->needed)
416 else if (DECL_COMDAT (decl))
418 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
419 && (optimize || !flag_keep_static_consts
420 || DECL_ARTIFICIAL (decl)))
425 rest_of_decl_compilation (decl, 1, 1);
433 /* Do any final processing required for the declarations in VEC, of
434 which there are LEN. We write out inline functions and variables
435 that have been deferred until this point, but which are required.
436 Returns nonzero if anything was put out. */
439 wrapup_global_declarations (tree *vec, int len)
441 bool reconsider, output_something = false;
444 for (i = 0; i < len; i++)
445 wrapup_global_declaration_1 (vec[i]);
447 /* Now emit any global variables or functions that we have been
448 putting off. We need to loop in case one of the things emitted
449 here references another one which comes earlier in the list. */
453 for (i = 0; i < len; i++)
454 reconsider |= wrapup_global_declaration_2 (vec[i]);
456 output_something = true;
460 return output_something;
463 /* A subroutine of check_global_declarations. Issue appropriate warnings
464 for the global declaration DECL. */
467 check_global_declaration_1 (tree decl)
469 /* Warn about any function declared static but not defined. We don't
470 warn about variables, because many programs have static variables
471 that exist only to get some text into the object file. */
472 if (TREE_CODE (decl) == FUNCTION_DECL
473 && DECL_INITIAL (decl) == 0
474 && DECL_EXTERNAL (decl)
475 && ! DECL_ARTIFICIAL (decl)
476 && ! TREE_NO_WARNING (decl)
477 && ! TREE_PUBLIC (decl)
478 && (warn_unused_function
479 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
481 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
482 pedwarn (input_location, 0, "%q+F used but never defined", decl);
484 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
485 /* This symbol is effectively an "extern" declaration now. */
486 TREE_PUBLIC (decl) = 1;
487 assemble_external (decl);
490 /* Warn about static fns or vars defined but not used. */
491 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
492 /* We don't warn about "static const" variables because the
493 "rcs_id" idiom uses that construction. */
494 || (warn_unused_variable
495 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
496 && ! DECL_IN_SYSTEM_HEADER (decl)
497 && ! TREE_USED (decl)
498 /* The TREE_USED bit for file-scope decls is kept in the identifier,
499 to handle multiple external decls in different scopes. */
500 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
501 && ! DECL_EXTERNAL (decl)
502 && ! TREE_PUBLIC (decl)
503 /* A volatile variable might be used in some non-obvious way. */
504 && ! TREE_THIS_VOLATILE (decl)
505 /* Global register variables must be declared to reserve them. */
506 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
507 /* Otherwise, ask the language. */
508 && lang_hooks.decls.warn_unused_global (decl))
509 warning ((TREE_CODE (decl) == FUNCTION_DECL)
510 ? OPT_Wunused_function
511 : OPT_Wunused_variable,
512 "%q+D defined but not used", decl);
515 /* Issue appropriate warnings for the global declarations in VEC (of
516 which there are LEN). */
519 check_global_declarations (tree *vec, int len)
523 for (i = 0; i < len; i++)
524 check_global_declaration_1 (vec[i]);
527 /* Emit debugging information for all global declarations in VEC. */
530 emit_debug_global_declarations (tree *vec, int len)
534 /* Avoid confusing the debug information machinery when there are errors. */
538 timevar_push (TV_SYMOUT);
539 for (i = 0; i < len; i++)
540 debug_hooks->global_decl (vec[i]);
541 timevar_pop (TV_SYMOUT);
544 /* Compile an entire translation unit. Write a file of assembly
545 output and various debugging dumps. */
550 timevar_start (TV_PHASE_PARSING);
551 timevar_push (TV_PARSE_GLOBAL);
553 /* Call the parser, which parses the entire file (calling
554 rest_of_compilation for each function). */
555 lang_hooks.parse_file ();
557 timevar_pop (TV_PARSE_GLOBAL);
558 timevar_stop (TV_PHASE_PARSING);
560 /* Compilation is now finished except for writing
561 what's left of the symbol table output. */
563 if (flag_syntax_only || flag_wpa)
566 timevar_start (TV_PHASE_GENERATE);
568 ggc_protect_identifiers = false;
570 /* This must also call cgraph_finalize_compilation_unit. */
571 lang_hooks.decls.final_write_globals ();
575 timevar_stop (TV_PHASE_GENERATE);
579 varpool_assemble_pending_decls ();
582 /* Likewise for mudflap static object registrations. */
584 mudflap_finish_file ();
586 output_shared_constant_pool ();
587 output_object_blocks ();
589 /* Write out any pending weak symbol declarations. */
592 /* This must be at the end before unwind and debug info.
593 Some target ports emit PIC setup thunks here. */
594 targetm.asm_out.code_end ();
596 /* Do dbx symbols. */
597 timevar_push (TV_SYMOUT);
599 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
600 if (dwarf2out_do_frame ())
601 dwarf2out_frame_finish ();
604 (*debug_hooks->finish) (main_input_filename);
605 timevar_pop (TV_SYMOUT);
607 /* Output some stuff at end of file if nec. */
609 dw2_output_indirect_constants ();
611 /* Flush any pending external directives. */
612 process_pending_assemble_externals ();
614 /* Emit LTO marker if LTO info has been previously emitted. This is
615 used by collect2 to determine whether an object file contains IL.
616 We used to emit an undefined reference here, but this produces
617 link errors if an object file with IL is stored into a shared
618 library without invoking lto1. */
619 if (flag_generate_lto)
621 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
622 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
624 (unsigned HOST_WIDE_INT) 1, 8);
625 #elif defined ASM_OUTPUT_ALIGNED_COMMON
626 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
627 (unsigned HOST_WIDE_INT) 1, 8);
629 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
630 (unsigned HOST_WIDE_INT) 1,
631 (unsigned HOST_WIDE_INT) 1);
635 /* Attach a special .ident directive to the end of the file to identify
636 the version of GCC which compiled this code. The format of the .ident
637 string is patterned after the ones produced by native SVR4 compilers. */
641 const char *pkg_version = "(GNU) ";
643 if (strcmp ("(GCC) ", pkgversion_string))
644 pkg_version = pkgversion_string;
645 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
646 IDENT_ASM_OP, pkg_version, version_string);
650 /* Invoke registered plugin callbacks. */
651 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
653 /* This must be at the end. Some target ports emit end of file directives
654 into the assembly file here, and hence we can not output anything to the
655 assembly file after this point. */
656 targetm.asm_out.file_end ();
658 timevar_stop (TV_PHASE_GENERATE);
661 /* Indexed by enum debug_info_type. */
662 const char *const debug_type_names[] =
664 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
667 /* Print version information to FILE.
668 Each line begins with INDENT (for the case where FILE is the
669 assembler output file). */
672 print_version (FILE *file, const char *indent)
674 static const char fmt1[] =
676 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
678 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
681 static const char fmt2[] =
682 N_("GMP version %s, MPFR version %s, MPC version %s\n");
683 static const char fmt3[] =
684 N_("%s%swarning: %s header version %s differs from library version %s.\n");
685 static const char fmt4[] =
686 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
688 #define __VERSION__ "[?]"
691 file == stderr ? _(fmt1) : fmt1,
692 indent, *indent != 0 ? " " : "",
693 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
694 indent, __VERSION__);
696 /* We need to stringify the GMP macro values. Ugh, gmp_version has
697 two string formats, "i.j.k" and "i.j" when k is zero. As of
698 gmp-4.3.0, GMP always uses the 3 number format. */
699 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
700 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
701 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
702 #define GCC_GMP_VERSION \
703 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
704 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
705 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
706 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
708 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
709 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
710 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
713 file == stderr ? _(fmt2) : fmt2,
714 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
715 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
717 file == stderr ? _(fmt3) : fmt3,
718 indent, *indent != 0 ? " " : "",
719 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
720 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
722 file == stderr ? _(fmt3) : fmt3,
723 indent, *indent != 0 ? " " : "",
724 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
725 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
727 file == stderr ? _(fmt3) : fmt3,
728 indent, *indent != 0 ? " " : "",
729 "MPC", MPC_VERSION_STRING, mpc_get_version ());
731 file == stderr ? _(fmt4) : fmt4,
732 indent, *indent != 0 ? " " : "",
733 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
735 print_plugins_versions (file, indent);
738 #ifdef ASM_COMMENT_START
740 print_to_asm_out_file (print_switch_type type, const char * text)
742 bool prepend_sep = true;
746 case SWITCH_TYPE_LINE_END:
747 putc ('\n', asm_out_file);
750 case SWITCH_TYPE_LINE_START:
751 fputs (ASM_COMMENT_START, asm_out_file);
752 return strlen (ASM_COMMENT_START);
754 case SWITCH_TYPE_DESCRIPTIVE:
755 if (ASM_COMMENT_START[0] == 0)
758 case SWITCH_TYPE_PASSED:
759 case SWITCH_TYPE_ENABLED:
761 fputc (' ', asm_out_file);
762 fputs (text, asm_out_file);
763 /* No need to return the length here as
764 print_single_switch has already done it. */
774 print_to_stderr (print_switch_type type, const char * text)
778 case SWITCH_TYPE_LINE_END:
782 case SWITCH_TYPE_LINE_START:
785 case SWITCH_TYPE_PASSED:
786 case SWITCH_TYPE_ENABLED:
790 case SWITCH_TYPE_DESCRIPTIVE:
791 fputs (text, stderr);
792 /* No need to return the length here as
793 print_single_switch has already done it. */
801 /* Print an option value and return the adjusted position in the line.
802 ??? print_fn doesn't handle errors, eg disk full; presumably other
803 code will catch a disk full though. */
806 print_single_switch (print_switch_fn_type print_fn,
808 print_switch_type type,
811 /* The ultrix fprintf returns 0 on success, so compute the result
812 we want here since we need it for the following test. The +1
813 is for the separator character that will probably be emitted. */
814 int len = strlen (text) + 1;
817 && pos + len > MAX_LINE)
819 print_fn (SWITCH_TYPE_LINE_END, NULL);
824 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
826 print_fn (type, text);
830 /* Print active target switches using PRINT_FN.
831 POS is the current cursor position and MAX is the size of a "line".
832 Each line begins with INDENT and ends with TERM.
833 Each switch is separated from the next by SEP. */
836 print_switch_values (print_switch_fn_type print_fn)
841 /* Fill in the -frandom-seed option, if the user didn't pass it, so
842 that it can be printed below. This helps reproducibility. */
843 if (!flag_random_seed)
846 /* Print the options as passed. */
847 pos = print_single_switch (print_fn, pos,
848 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
850 for (j = 1; j < save_decoded_options_count; j++)
852 switch (save_decoded_options[j].opt_index)
865 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED,
866 save_decoded_options[j].orig_option_with_args_text);
870 print_fn (SWITCH_TYPE_LINE_END, NULL);
872 /* Print the -f and -m options that have been enabled.
873 We don't handle language specific options but printing argv
875 pos = print_single_switch (print_fn, 0,
876 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
878 for (j = 0; j < cl_options_count; j++)
879 if (cl_options[j].cl_report
880 && option_enabled (j, &global_options) > 0)
881 pos = print_single_switch (print_fn, pos,
882 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
884 print_fn (SWITCH_TYPE_LINE_END, NULL);
887 /* Open assembly code output file. Do this even if -fsyntax-only is
888 on, because then the driver will have provided the name of a
889 temporary file or bit bucket for us. NAME is the file specified on
890 the command line, possibly NULL. */
892 init_asm_output (const char *name)
894 if (name == NULL && asm_file_name == 0)
895 asm_out_file = stdout;
898 if (asm_file_name == 0)
900 int len = strlen (dump_base_name);
901 char *dumpname = XNEWVEC (char, len + 6);
903 memcpy (dumpname, dump_base_name, len + 1);
904 strip_off_ending (dumpname, len);
905 strcat (dumpname, ".s");
906 asm_file_name = dumpname;
908 if (!strcmp (asm_file_name, "-"))
909 asm_out_file = stdout;
911 asm_out_file = fopen (asm_file_name, "w+b");
912 if (asm_out_file == 0)
913 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
916 if (!flag_syntax_only)
918 targetm.asm_out.file_start ();
920 if (flag_record_gcc_switches)
922 if (targetm.asm_out.record_gcc_switches)
924 /* Let the target know that we are about to start recording. */
925 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
927 /* Now record the switches. */
928 print_switch_values (targetm.asm_out.record_gcc_switches);
929 /* Let the target know that the recording is over. */
930 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
934 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
937 #ifdef ASM_COMMENT_START
938 if (flag_verbose_asm)
940 /* Print the list of switches in effect
941 into the assembler file as comments. */
942 print_version (asm_out_file, ASM_COMMENT_START);
943 print_switch_values (print_to_asm_out_file);
944 putc ('\n', asm_out_file);
950 /* Default tree printer. Handles declarations only. */
952 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
953 int precision, bool wide, bool set_locus, bool hash)
957 /* FUTURE: %+x should set the locus. */
958 if (precision != 0 || wide || hash)
964 t = va_arg (*text->args_ptr, tree);
965 if (TREE_CODE (t) == IDENTIFIER_NODE)
967 pp_identifier (pp, IDENTIFIER_POINTER (t));
973 t = va_arg (*text->args_ptr, tree);
974 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
975 t = DECL_DEBUG_EXPR (t);
980 t = va_arg (*text->args_ptr, tree);
984 percent_K_format (text);
991 if (set_locus && text->locus)
992 *text->locus = DECL_SOURCE_LOCATION (t);
996 const char *n = DECL_NAME (t)
997 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1002 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1007 /* A helper function; used as the reallocator function for cpp's line
1010 realloc_for_line_map (void *ptr, size_t len)
1012 return GGC_RESIZEVAR (void, ptr, len);
1015 /* A helper function: used as the allocator function for
1016 identifier_to_locale. */
1018 alloc_for_identifier_to_locale (size_t len)
1020 return ggc_alloc_atomic (len);
1023 /* Output stack usage information. */
1025 output_stack_usage (void)
1027 static bool warning_issued = false;
1028 enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED };
1029 const char *stack_usage_kind_str[] = {
1034 HOST_WIDE_INT stack_usage = current_function_static_stack_size;
1035 enum stack_usage_kind_type stack_usage_kind;
1037 if (stack_usage < 0)
1039 if (!warning_issued)
1041 warning (0, "stack usage computation not supported for this target");
1042 warning_issued = true;
1047 stack_usage_kind = STATIC;
1049 /* Add the maximum amount of space pushed onto the stack. */
1050 if (current_function_pushed_stack_size > 0)
1052 stack_usage += current_function_pushed_stack_size;
1053 stack_usage_kind = DYNAMIC_BOUNDED;
1056 /* Now on to the tricky part: dynamic stack allocation. */
1057 if (current_function_allocates_dynamic_stack_space)
1059 if (current_function_has_unbounded_dynamic_stack_size)
1060 stack_usage_kind = DYNAMIC;
1062 stack_usage_kind = DYNAMIC_BOUNDED;
1064 /* Add the size even in the unbounded case, this can't hurt. */
1065 stack_usage += current_function_dynamic_stack_size;
1068 if (flag_stack_usage)
1070 expanded_location loc
1071 = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
1072 const char *raw_id, *id;
1074 /* Strip the scope prefix if any. */
1075 raw_id = lang_hooks.decl_printable_name (current_function_decl, 2);
1076 id = strrchr (raw_id, '.');
1082 fprintf (stack_usage_file,
1083 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC"\t%s\n",
1084 lbasename (loc.file),
1089 stack_usage_kind_str[stack_usage_kind]);
1092 if (warn_stack_usage >= 0)
1094 if (stack_usage_kind == DYNAMIC)
1095 warning (OPT_Wstack_usage_, "stack usage might be unbounded");
1096 else if (stack_usage > warn_stack_usage)
1098 if (stack_usage_kind == DYNAMIC_BOUNDED)
1099 warning (OPT_Wstack_usage_, "stack usage might be %wd bytes",
1102 warning (OPT_Wstack_usage_, "stack usage is %wd bytes",
1108 /* Open an auxiliary output file. */
1110 open_auxiliary_file (const char *ext)
1115 filename = concat (aux_base_name, ".", ext, NULL);
1116 file = fopen (filename, "w");
1118 fatal_error ("can%'t open %s for writing: %m", filename);
1123 /* Initialization of the front end environment, before command line
1124 options are parsed. Signal handlers, internationalization etc.
1125 ARGV0 is main's argv[0]. */
1127 general_init (const char *argv0)
1131 p = argv0 + strlen (argv0);
1132 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1136 xmalloc_set_program_name (progname);
1140 /* Unlock the stdio streams. */
1141 unlock_std_streams ();
1143 gcc_init_libintl ();
1145 identifier_to_locale_alloc = alloc_for_identifier_to_locale;
1146 identifier_to_locale_free = ggc_free;
1148 /* Initialize the diagnostics reporting machinery, so option parsing
1149 can give warnings and errors. */
1150 diagnostic_initialize (global_dc, N_OPTS);
1151 diagnostic_starter (global_dc) = default_tree_diagnostic_starter;
1152 /* Set a default printer. Language specific initializations will
1153 override it later. */
1154 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1155 global_dc->show_option_requested
1156 = global_options_init.x_flag_diagnostics_show_option;
1157 global_dc->show_column
1158 = global_options_init.x_flag_show_column;
1159 global_dc->internal_error = plugins_internal_error_function;
1160 global_dc->option_enabled = option_enabled;
1161 global_dc->option_state = &global_options;
1162 global_dc->option_name = option_name;
1164 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1166 signal (SIGSEGV, crash_signal);
1169 signal (SIGILL, crash_signal);
1172 signal (SIGBUS, crash_signal);
1175 signal (SIGABRT, crash_signal);
1177 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1178 signal (SIGIOT, crash_signal);
1181 signal (SIGFPE, crash_signal);
1184 /* Other host-specific signal setup. */
1185 (*host_hooks.extra_signals)();
1187 /* Initialize the garbage-collector, string pools and tree type hash
1191 line_table = ggc_alloc_line_maps ();
1192 linemap_init (line_table);
1193 line_table->reallocator = realloc_for_line_map;
1196 /* Initialize register usage now so switches may override. */
1199 /* Register the language-independent parameters. */
1200 global_init_params ();
1202 /* This must be done after global_init_params but before argument
1204 init_ggc_heuristics();
1205 init_optimization_passes ();
1206 statistics_early_init ();
1210 /* Return true if the current target supports -fsection-anchors. */
1213 target_supports_section_anchors_p (void)
1215 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1218 if (targetm.asm_out.output_anchor == NULL)
1224 /* Default the align_* variables to 1 if they're still unset, and
1225 set up the align_*_log variables. */
1227 init_alignments (void)
1229 if (align_loops <= 0)
1231 if (align_loops_max_skip > align_loops)
1232 align_loops_max_skip = align_loops - 1;
1233 align_loops_log = floor_log2 (align_loops * 2 - 1);
1234 if (align_jumps <= 0)
1236 if (align_jumps_max_skip > align_jumps)
1237 align_jumps_max_skip = align_jumps - 1;
1238 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1239 if (align_labels <= 0)
1241 align_labels_log = floor_log2 (align_labels * 2 - 1);
1242 if (align_labels_max_skip > align_labels)
1243 align_labels_max_skip = align_labels - 1;
1244 if (align_functions <= 0)
1245 align_functions = 1;
1246 align_functions_log = floor_log2 (align_functions * 2 - 1);
1249 /* Process the options that have been parsed. */
1251 process_options (void)
1253 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1254 This can happen with incorrect pre-processed input. */
1255 debug_hooks = &do_nothing_debug_hooks;
1257 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;
1259 /* Allow the front end to perform consistency checks and do further
1260 initialization based on the command line options. This hook also
1261 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1262 so we can correctly initialize debug output. */
1263 no_backend = lang_hooks.post_options (&main_input_filename);
1265 /* Some machines may reject certain combinations of options. */
1266 targetm.target_option.override ();
1268 /* Avoid any informative notes in the second run of -fcompare-debug. */
1269 if (flag_compare_debug)
1270 diagnostic_inhibit_notes (global_dc);
1272 if (flag_section_anchors && !target_supports_section_anchors_p ())
1274 warning (OPT_fsection_anchors,
1275 "this target does not support %qs", "-fsection-anchors");
1276 flag_section_anchors = 0;
1279 if (flag_short_enums == 2)
1280 flag_short_enums = targetm.default_short_enums ();
1282 /* Set aux_base_name if not already set. */
1285 else if (main_input_filename)
1287 char *name = xstrdup (lbasename (main_input_filename));
1289 strip_off_ending (name, strlen (name));
1290 aux_base_name = name;
1293 aux_base_name = "gccaux";
1297 || flag_graphite_identity
1299 || flag_loop_flatten
1300 || flag_loop_interchange
1301 || flag_loop_strip_mine
1302 || flag_loop_parallelize_all)
1303 sorry ("Graphite loop optimizations cannot be used (-fgraphite, "
1304 "-fgraphite-identity, -floop-block, -floop-flatten, "
1305 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1306 "and -ftree-loop-linear)");
1309 /* Unrolling all loops implies that standard loop unrolling must also
1311 if (flag_unroll_all_loops)
1312 flag_unroll_loops = 1;
1314 /* web and rename-registers help when run after loop unrolling. */
1315 if (flag_web == AUTODETECT_VALUE)
1316 flag_web = flag_unroll_loops || flag_peel_loops;
1318 if (flag_rename_registers == AUTODETECT_VALUE)
1319 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1321 if (flag_non_call_exceptions)
1322 flag_asynchronous_unwind_tables = 1;
1323 if (flag_asynchronous_unwind_tables)
1324 flag_unwind_tables = 1;
1326 if (flag_value_profile_transformations)
1327 flag_profile_values = 1;
1329 /* Warn about options that are not supported on this machine. */
1330 #ifndef INSN_SCHEDULING
1331 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1332 warning (0, "instruction scheduling not supported on this target machine");
1335 if (flag_delayed_branch)
1336 warning (0, "this target machine does not have delayed branches");
1339 user_label_prefix = USER_LABEL_PREFIX;
1340 if (flag_leading_underscore != -1)
1342 /* If the default prefix is more complicated than "" or "_",
1343 issue a warning and ignore this option. */
1344 if (user_label_prefix[0] == 0 ||
1345 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1347 user_label_prefix = flag_leading_underscore ? "_" : "";
1350 warning (0, "-f%sleading-underscore not supported on this target machine",
1351 flag_leading_underscore ? "" : "no-");
1354 /* If we are in verbose mode, write out the version and maybe all the
1355 option flags in use. */
1358 print_version (stderr, "");
1360 print_switch_values (print_to_stderr);
1363 if (flag_syntax_only)
1365 write_symbols = NO_DEBUG;
1371 if (debug_info_level == DINFO_LEVEL_NONE)
1373 debug_info_level = DINFO_LEVEL_NORMAL;
1375 if (write_symbols == NO_DEBUG)
1376 write_symbols = PREFERRED_DEBUGGING_TYPE;
1379 debug_info_level = DINFO_LEVEL_NONE;
1382 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1384 FILE *final_output = fopen (flag_dump_final_insns, "w");
1387 error ("could not open final insn dump file %qs: %m",
1388 flag_dump_final_insns);
1389 flag_dump_final_insns = NULL;
1391 else if (fclose (final_output))
1393 error ("could not close zeroed insn dump file %qs: %m",
1394 flag_dump_final_insns);
1395 flag_dump_final_insns = NULL;
1399 /* Unless over-ridden for the target, assume that all DWARF levels
1400 may be emitted, if DWARF2_DEBUG is selected. */
1401 if (dwarf_strict < 0)
1404 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1406 if (debug_info_level == DINFO_LEVEL_NONE)
1407 write_symbols = NO_DEBUG;
1409 if (write_symbols == NO_DEBUG)
1411 #if defined(DBX_DEBUGGING_INFO)
1412 else if (write_symbols == DBX_DEBUG)
1413 debug_hooks = &dbx_debug_hooks;
1415 #if defined(XCOFF_DEBUGGING_INFO)
1416 else if (write_symbols == XCOFF_DEBUG)
1417 debug_hooks = &xcoff_debug_hooks;
1419 #ifdef SDB_DEBUGGING_INFO
1420 else if (write_symbols == SDB_DEBUG)
1421 debug_hooks = &sdb_debug_hooks;
1423 #ifdef DWARF2_DEBUGGING_INFO
1424 else if (write_symbols == DWARF2_DEBUG)
1425 debug_hooks = &dwarf2_debug_hooks;
1427 #ifdef VMS_DEBUGGING_INFO
1428 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1429 debug_hooks = &vmsdbg_debug_hooks;
1432 error ("target system does not support the \"%s\" debug format",
1433 debug_type_names[write_symbols]);
1435 /* We know which debug output will be used so we can set flag_var_tracking
1436 and flag_var_tracking_uninit if the user has not specified them. */
1437 if (debug_info_level < DINFO_LEVEL_NORMAL
1438 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1440 if (flag_var_tracking == 1
1441 || flag_var_tracking_uninit == 1)
1443 if (debug_info_level < DINFO_LEVEL_NORMAL)
1444 warning (0, "variable tracking requested, but useless unless "
1445 "producing debug info");
1447 warning (0, "variable tracking requested, but not supported "
1448 "by this debug format");
1450 flag_var_tracking = 0;
1451 flag_var_tracking_uninit = 0;
1454 /* The debug hooks are used to implement -fdump-go-spec because it
1455 gives a simple and stable API for all the information we need to
1457 if (flag_dump_go_spec != NULL)
1458 debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks);
1460 /* If the user specifically requested variable tracking with tagging
1461 uninitialized variables, we need to turn on variable tracking.
1462 (We already determined above that variable tracking is feasible.) */
1463 if (flag_var_tracking_uninit)
1464 flag_var_tracking = 1;
1466 if (flag_var_tracking == AUTODETECT_VALUE)
1467 flag_var_tracking = optimize >= 1;
1469 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
1470 flag_var_tracking_assignments = flag_var_tracking
1471 && !(flag_selective_scheduling || flag_selective_scheduling2);
1473 if (flag_var_tracking_assignments_toggle)
1474 flag_var_tracking_assignments = !flag_var_tracking_assignments;
1476 if (flag_var_tracking_assignments && !flag_var_tracking)
1477 flag_var_tracking = flag_var_tracking_assignments = -1;
1479 if (flag_var_tracking_assignments
1480 && (flag_selective_scheduling || flag_selective_scheduling2))
1481 warning (0, "var-tracking-assignments changes selective scheduling");
1483 if (flag_tree_cselim == AUTODETECT_VALUE)
1484 #ifdef HAVE_conditional_move
1485 flag_tree_cselim = 1;
1487 flag_tree_cselim = 0;
1490 /* If auxiliary info generation is desired, open the output file.
1491 This goes in the same directory as the source file--unlike
1492 all the other output files. */
1493 if (flag_gen_aux_info)
1495 aux_info_file = fopen (aux_info_file_name, "w");
1496 if (aux_info_file == 0)
1497 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1500 if (!targetm_common.have_named_sections)
1502 if (flag_function_sections)
1504 warning (0, "-ffunction-sections not supported for this target");
1505 flag_function_sections = 0;
1507 if (flag_data_sections)
1509 warning (0, "-fdata-sections not supported for this target");
1510 flag_data_sections = 0;
1514 if (flag_function_sections && profile_flag)
1516 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1517 flag_function_sections = 0;
1520 #ifndef HAVE_prefetch
1521 if (flag_prefetch_loop_arrays > 0)
1523 warning (0, "-fprefetch-loop-arrays not supported for this target");
1524 flag_prefetch_loop_arrays = 0;
1527 if (flag_prefetch_loop_arrays > 0 && !HAVE_prefetch)
1529 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1530 flag_prefetch_loop_arrays = 0;
1534 /* This combination of options isn't handled for i386 targets and doesn't
1535 make much sense anyway, so don't allow it. */
1536 if (flag_prefetch_loop_arrays > 0 && optimize_size)
1538 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1539 flag_prefetch_loop_arrays = 0;
1542 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1543 if (flag_signaling_nans)
1544 flag_trapping_math = 1;
1546 /* We cannot reassociate if we want traps or signed zeros. */
1547 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1549 warning (0, "-fassociative-math disabled; other options take precedence");
1550 flag_associative_math = 0;
1553 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1554 if (flag_cx_limited_range)
1555 flag_complex_method = 0;
1557 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1558 if (flag_cx_fortran_rules)
1559 flag_complex_method = 1;
1561 /* Targets must be able to place spill slots at lower addresses. If the
1562 target already uses a soft frame pointer, the transition is trivial. */
1563 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1565 warning (0, "-fstack-protector not supported for this target");
1566 flag_stack_protect = 0;
1568 if (!flag_stack_protect)
1569 warn_stack_protect = 0;
1571 /* ??? Unwind info is not correct around the CFG unless either a frame
1572 pointer is present or A_O_A is set. Fixing this requires rewriting
1573 unwind info generation to be aware of the CFG and propagating states
1575 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1576 && flag_omit_frame_pointer)
1578 warning (0, "unwind tables currently require a frame pointer "
1580 flag_omit_frame_pointer = 0;
1583 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1584 have not been set. */
1585 if (!global_options_set.x_warnings_are_errors
1586 && warn_coverage_mismatch
1587 && (global_dc->classify_diagnostic[OPT_Wcoverage_mismatch] ==
1589 diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_mismatch,
1590 DK_ERROR, UNKNOWN_LOCATION);
1592 /* Save the current optimization options. */
1593 optimization_default_node = build_optimization_node ();
1594 optimization_current_node = optimization_default_node;
1597 /* This function can be called multiple times to reinitialize the compiler
1598 back end when register classes or instruction sets have changed,
1599 before each function. */
1601 backend_init_target (void)
1603 /* Initialize alignment variables. */
1606 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1607 to initialize reg_raw_mode[]. */
1610 /* This invokes target hooks to set fixed_reg[] etc, which is
1614 /* This depends on stack_pointer_rtx. */
1615 init_fake_stack_mems ();
1617 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1619 init_alias_target ();
1621 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1624 /* The following initialization functions need to generate rtl, so
1625 provide a dummy function context for them. */
1626 init_dummy_function_start ();
1628 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1629 on a mode change. */
1632 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1633 after a mode change as well. */
1634 caller_save_initialized_p = false;
1636 expand_dummy_function_end ();
1639 /* Initialize the compiler back end. This function is called only once,
1640 when starting the compiler. */
1647 init_inline_once ();
1648 init_varasm_once ();
1649 save_register_info ();
1651 /* Initialize the target-specific back end pieces. */
1653 backend_init_target ();
1656 /* Initialize excess precision settings. */
1658 init_excess_precision (void)
1660 /* Adjust excess precision handling based on the target options. If
1661 the front end cannot handle it, flag_excess_precision_cmdline
1662 will already have been set accordingly in the post_options
1664 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
1665 flag_excess_precision = flag_excess_precision_cmdline;
1666 if (flag_unsafe_math_optimizations)
1667 flag_excess_precision = EXCESS_PRECISION_FAST;
1668 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
1670 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
1671 switch (flt_eval_method)
1675 /* Either the target acts unpredictably (-1) or has all the
1676 operations required not to have excess precision (0). */
1677 flag_excess_precision = EXCESS_PRECISION_FAST;
1681 /* In these cases, predictable excess precision makes
1685 /* Any other implementation-defined FLT_EVAL_METHOD values
1686 require the compiler to handle the associated excess
1687 precision rules in excess_precision_type. */
1693 /* Initialize things that are both lang-dependent and target-dependent.
1694 This function can be called more than once if target parameters change. */
1696 lang_dependent_init_target (void)
1698 /* This determines excess precision settings. */
1699 init_excess_precision ();
1701 /* This creates various _DECL nodes, so needs to be called after the
1702 front end is initialized. It also depends on the HAVE_xxx macros
1703 generated from the target machine description. */
1706 /* The following initialization functions need to generate rtl, so
1707 provide a dummy function context for them. */
1708 init_dummy_function_start ();
1710 /* Do the target-specific parts of expr initialization. */
1711 init_expr_target ();
1713 /* Although the actions of these functions are language-independent,
1714 they use optabs, so we cannot call them from backend_init. */
1718 expand_dummy_function_end ();
1721 /* Language-dependent initialization. Returns nonzero on success. */
1723 lang_dependent_init (const char *name)
1725 location_t save_loc = input_location;
1726 if (dump_base_name == 0)
1727 dump_base_name = name && name[0] ? name : "gccdump";
1729 /* Other front-end initialization. */
1730 input_location = BUILTINS_LOCATION;
1731 if (lang_hooks.init () == 0)
1733 input_location = save_loc;
1737 init_asm_output (name);
1739 /* If stack usage information is desired, open the output file. */
1740 if (flag_stack_usage)
1741 stack_usage_file = open_auxiliary_file ("su");
1744 /* This creates various _DECL nodes, so needs to be called after the
1745 front end is initialized. */
1748 /* Do the target-specific parts of the initialization. */
1749 lang_dependent_init_target ();
1753 /* If dbx symbol table desired, initialize writing it and output the
1754 predefined types. */
1755 timevar_push (TV_SYMOUT);
1757 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1758 if (dwarf2out_do_frame ())
1759 dwarf2out_frame_init ();
1762 /* Now we have the correct original filename, we can initialize
1764 (*debug_hooks->init) (name);
1766 timevar_pop (TV_SYMOUT);
1773 /* Reinitialize everything when target parameters, such as register usage,
1776 target_reinit (void)
1778 struct rtl_data saved_x_rtl;
1779 rtx *saved_regno_reg_rtx;
1781 /* Save *crtl and regno_reg_rtx around the reinitialization
1782 to allow target_reinit being called even after prepare_function_start. */
1783 saved_regno_reg_rtx = regno_reg_rtx;
1784 if (saved_regno_reg_rtx)
1786 saved_x_rtl = *crtl;
1787 memset (crtl, '\0', sizeof (*crtl));
1788 regno_reg_rtx = NULL;
1791 /* Reinitialize RTL backend. */
1792 backend_init_target ();
1794 /* Reinitialize lang-dependent parts. */
1795 lang_dependent_init_target ();
1797 /* And restore it at the end, as free_after_compilation from
1798 expand_dummy_function_end clears it. */
1799 if (saved_regno_reg_rtx)
1801 *crtl = saved_x_rtl;
1802 regno_reg_rtx = saved_regno_reg_rtx;
1803 saved_regno_reg_rtx = NULL;
1808 dump_memory_report (bool final)
1810 ggc_print_statistics ();
1811 stringpool_statistics ();
1812 dump_tree_statistics ();
1813 dump_gimple_statistics ();
1814 dump_rtx_statistics ();
1815 dump_alloc_pool_statistics ();
1816 dump_bitmap_statistics ();
1817 dump_vec_loc_statistics ();
1818 dump_ggc_loc_statistics (final);
1819 dump_alias_stats (stderr);
1820 dump_pta_stats (stderr);
1823 /* Clean up: close opened files, etc. */
1826 finalize (bool no_backend)
1828 /* Close the dump files. */
1829 if (flag_gen_aux_info)
1831 fclose (aux_info_file);
1833 unlink (aux_info_file_name);
1836 /* Close non-debugging input and output files. Take special care to note
1837 whether fclose returns an error, since the pages might still be on the
1838 buffer chain while the file is open. */
1842 if (ferror (asm_out_file) != 0)
1843 fatal_error ("error writing to %s: %m", asm_file_name);
1844 if (fclose (asm_out_file) != 0)
1845 fatal_error ("error closing %s: %m", asm_file_name);
1848 if (stack_usage_file)
1849 fclose (stack_usage_file);
1855 finish_optimization_passes ();
1861 dump_memory_report (true);
1863 /* Language-specific end of compilation actions. */
1864 lang_hooks.finish ();
1867 /* Initialize the compiler, and compile the input file. */
1871 /* Initialize timing first. The C front ends read the main file in
1872 the post_options hook, and C++ does file timings. */
1873 if (time_report || !quiet_flag || flag_detailed_statistics)
1875 timevar_start (TV_TOTAL);
1879 /* Don't do any more if an error has already occurred. */
1882 timevar_start (TV_PHASE_SETUP);
1884 /* This must be run always, because it is needed to compute the FP
1885 predefined macros, such as __LDBL_MAX__, for targets using non
1886 default FP formats. */
1887 init_adjust_machine_modes ();
1889 /* Set up the back-end if requested. */
1893 /* Language-dependent initialization. Returns true on success. */
1894 if (lang_dependent_init (main_input_filename))
1896 /* Initialize yet another pass. */
1898 ggc_protect_identifiers = true;
1901 init_final (main_input_filename);
1902 coverage_init (aux_base_name);
1904 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
1906 timevar_stop (TV_PHASE_SETUP);
1912 timevar_stop (TV_PHASE_SETUP);
1915 timevar_start (TV_PHASE_FINALIZE);
1917 finalize (no_backend);
1919 timevar_stop (TV_PHASE_FINALIZE);
1922 /* Stop timing and print the times. */
1923 timevar_stop (TV_TOTAL);
1924 timevar_print (stderr);
1927 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1928 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1929 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1931 It is not safe to call this function more than once. */
1934 toplev_main (int argc, char **argv)
1936 expandargv (&argc, &argv);
1938 /* Initialization of GCC's environment, and diagnostics. */
1939 general_init (argv[0]);
1941 /* One-off initialization of options that does not need to be
1942 repeated when options are added for particular functions. */
1943 init_options_once ();
1945 /* Initialize global options structures; this must be repeated for
1946 each structure used for parsing options. */
1947 init_options_struct (&global_options, &global_options_set);
1948 lang_hooks.init_options_struct (&global_options);
1950 /* Convert the options to an array. */
1951 decode_cmdline_options_to_array_default_mask (argc,
1952 CONST_CAST2 (const char **,
1954 &save_decoded_options,
1955 &save_decoded_options_count);
1957 /* Perform language-specific options initialization. */
1958 lang_hooks.init_options (save_decoded_options_count, save_decoded_options);
1960 /* Parse the options and do minimal processing; basically just
1961 enough to default flags appropriately. */
1962 decode_options (&global_options, &global_options_set,
1963 save_decoded_options, save_decoded_options_count,
1964 UNKNOWN_LOCATION, global_dc);
1966 handle_common_deferred_options ();
1970 initialize_plugins ();
1973 print_version (stderr, "");
1976 print_plugins_help (stderr, "");
1978 /* Exit early if we can (e.g. -help). */
1979 if (!exit_after_options)
1982 if (warningcount || errorcount)
1983 print_ignored_options ();
1984 diagnostic_finish (global_dc);
1986 /* Invoke registered plugin callbacks if any. */
1987 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
1989 finalize_plugins ();
1991 return (FATAL_EXIT_CODE);
1993 return (SUCCESS_EXIT_CODE);