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 /* The FUNCTION_DECL for the function currently being compiled,
129 or 0 if between functions. */
130 tree current_function_decl;
132 /* Set to the FUNC_BEGIN label of the current function, or NULL
134 const char * current_function_func_begin_label;
136 /* A random sequence of characters, unless overridden by user. */
137 static const char *flag_random_seed;
139 /* A local time stamp derived from the time of compilation. It will be
140 zero if the system cannot provide a time. It will be -1u, if the
141 user has specified a particular random seed. */
146 /* Generate code for GNU or NeXT Objective-C runtime environment. */
148 #ifdef NEXT_OBJC_RUNTIME
149 int flag_next_runtime = 1;
151 int flag_next_runtime = 0;
154 /* Nonzero means make permerror produce warnings instead of errors. */
156 int flag_permissive = 0;
158 /* When non-NULL, indicates that whenever space is allocated on the
159 stack, the resulting stack pointer must not pass this
160 address---that is, for stacks that grow downward, the stack pointer
161 must always be greater than or equal to this address; for stacks
162 that grow upward, the stack pointer must be less than this address.
163 At present, the rtx may be either a REG or a SYMBOL_REF, although
164 the support provided depends on the backend. */
167 /* True if the user has tagged the function with the 'section'
170 bool user_defined_section_attribute = false;
172 struct target_flag_state default_target_flag_state;
173 #if SWITCHABLE_TARGET
174 struct target_flag_state *this_target_flag_state = &default_target_flag_state;
176 #define this_target_flag_state (&default_target_flag_state)
179 /* The user symbol prefix after having resolved same. */
180 const char *user_label_prefix;
182 /* Output files for assembler code (real compiler output)
183 and debugging dumps. */
187 FILE *stack_usage_file = NULL;
188 FILE *dump_file = NULL;
189 const char *dump_file_name;
191 /* The current working directory of a translation. It's generally the
192 directory from which compilation was initiated, but a preprocessed
193 file may specify the original directory in which it was
196 static const char *src_pwd;
198 /* Initialize src_pwd with the given string, and return true. If it
199 was already initialized, return false. As a special case, it may
200 be called with a NULL argument to test whether src_pwd has NOT been
204 set_src_pwd (const char *pwd)
208 if (strcmp (src_pwd, pwd) == 0)
214 src_pwd = xstrdup (pwd);
218 /* Return the directory from which the translation unit was initiated,
219 in case set_src_pwd() was not called before to assign it a
235 /* Called when the start of a function definition is parsed,
236 this function prints on stderr the name of the function. */
238 announce_function (tree decl)
242 if (rtl_dump_and_exit)
243 fprintf (stderr, "%s ",
244 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
246 fprintf (stderr, " %s",
247 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
249 pp_needs_newline (global_dc->printer) = true;
250 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
254 /* Initialize local_tick with the time of day, or -1 if
255 flag_random_seed is set. */
258 init_local_tick (void)
260 if (!flag_random_seed)
262 /* Get some more or less random data. */
263 #ifdef HAVE_GETTIMEOFDAY
267 gettimeofday (&tv, NULL);
268 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
272 time_t now = time (NULL);
274 if (now != (time_t)-1)
275 local_tick = (unsigned) now;
283 /* Set up a default flag_random_seed and local_tick, unless the user
284 already specified one. Must be called after init_local_tick. */
287 init_random_seed (void)
289 unsigned HOST_WIDE_INT value;
290 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
292 value = local_tick ^ getpid ();
294 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
295 flag_random_seed = random_seed;
298 /* Obtain the random_seed string. Unless NOINIT, initialize it if
299 it's not provided in the command line. */
302 get_random_seed (bool noinit)
304 if (!flag_random_seed && !noinit)
306 return flag_random_seed;
309 /* Modify the random_seed string to VAL. Return its previous
313 set_random_seed (const char *val)
315 const char *old = flag_random_seed;
316 flag_random_seed = val;
320 /* Handler for fatal signals, such as SIGSEGV. These are transformed
321 into ICE messages, which is much more user friendly. In case the
322 error printer crashes, reset the signal to prevent infinite recursion. */
325 crash_signal (int signo)
327 signal (signo, SIG_DFL);
329 /* If we crashed while processing an ASM statement, then be a little more
330 graceful. It's most likely the user's fault. */
331 if (this_is_asm_operands)
333 output_operand_lossage ("unrecoverable error");
334 exit (FATAL_EXIT_CODE);
337 internal_error ("%s", strsignal (signo));
340 /* A subroutine of wrapup_global_declarations. We've come to the end of
341 the compilation unit. All deferred variables should be undeferred,
342 and all incomplete decls should be finalized. */
345 wrapup_global_declaration_1 (tree decl)
347 /* We're not deferring this any longer. Assignment is conditional to
348 avoid needlessly dirtying PCH pages. */
349 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
350 && DECL_DEFER_OUTPUT (decl) != 0)
351 DECL_DEFER_OUTPUT (decl) = 0;
353 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
354 lang_hooks.finish_incomplete_decl (decl);
357 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
358 needs to be output. Return true if it is output. */
361 wrapup_global_declaration_2 (tree decl)
363 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
366 /* Don't write out static consts, unless we still need them.
368 We also keep static consts if not optimizing (for debugging),
369 unless the user specified -fno-keep-static-consts.
370 ??? They might be better written into the debug information.
371 This is possible when using DWARF.
373 A language processor that wants static constants to be always
374 written out (even if it is not used) is responsible for
375 calling rest_of_decl_compilation itself. E.g. the C front-end
376 calls rest_of_decl_compilation from finish_decl.
377 One motivation for this is that is conventional in some
378 environments to write things like:
379 static const char rcsid[] = "... version string ...";
380 intending to force the string to be in the executable.
382 A language processor that would prefer to have unneeded
383 static constants "optimized away" would just defer writing
384 them out until here. E.g. C++ does this, because static
385 constants are often defined in header files.
387 ??? A tempting alternative (for both C and C++) would be
388 to force a constant to be written if and only if it is
389 defined in a main file, as opposed to an include file. */
391 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
393 struct varpool_node *node;
395 node = varpool_get_node (decl);
397 if (!node && flag_ltrans)
399 else if (node && node->finalized)
401 else if (node && node->alias)
403 else if (!cgraph_global_info_ready
405 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
407 else if (node && node->needed)
409 else if (DECL_COMDAT (decl))
411 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
412 && (optimize || !flag_keep_static_consts
413 || DECL_ARTIFICIAL (decl)))
418 rest_of_decl_compilation (decl, 1, 1);
426 /* Do any final processing required for the declarations in VEC, of
427 which there are LEN. We write out inline functions and variables
428 that have been deferred until this point, but which are required.
429 Returns nonzero if anything was put out. */
432 wrapup_global_declarations (tree *vec, int len)
434 bool reconsider, output_something = false;
437 for (i = 0; i < len; i++)
438 wrapup_global_declaration_1 (vec[i]);
440 /* Now emit any global variables or functions that we have been
441 putting off. We need to loop in case one of the things emitted
442 here references another one which comes earlier in the list. */
446 for (i = 0; i < len; i++)
447 reconsider |= wrapup_global_declaration_2 (vec[i]);
449 output_something = true;
453 return output_something;
456 /* A subroutine of check_global_declarations. Issue appropriate warnings
457 for the global declaration DECL. */
460 check_global_declaration_1 (tree decl)
462 /* Warn about any function declared static but not defined. We don't
463 warn about variables, because many programs have static variables
464 that exist only to get some text into the object file. */
465 if (TREE_CODE (decl) == FUNCTION_DECL
466 && DECL_INITIAL (decl) == 0
467 && DECL_EXTERNAL (decl)
468 && ! DECL_ARTIFICIAL (decl)
469 && ! TREE_NO_WARNING (decl)
470 && ! TREE_PUBLIC (decl)
471 && (warn_unused_function
472 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
474 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
475 pedwarn (input_location, 0, "%q+F used but never defined", decl);
477 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
478 /* This symbol is effectively an "extern" declaration now. */
479 TREE_PUBLIC (decl) = 1;
480 assemble_external (decl);
483 /* Warn about static fns or vars defined but not used. */
484 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
485 /* We don't warn about "static const" variables because the
486 "rcs_id" idiom uses that construction. */
487 || (warn_unused_variable
488 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
489 && ! DECL_IN_SYSTEM_HEADER (decl)
490 && ! TREE_USED (decl)
491 /* The TREE_USED bit for file-scope decls is kept in the identifier,
492 to handle multiple external decls in different scopes. */
493 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
494 && ! DECL_EXTERNAL (decl)
495 && ! TREE_PUBLIC (decl)
496 /* A volatile variable might be used in some non-obvious way. */
497 && ! TREE_THIS_VOLATILE (decl)
498 /* Global register variables must be declared to reserve them. */
499 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
500 /* Otherwise, ask the language. */
501 && lang_hooks.decls.warn_unused_global (decl))
502 warning ((TREE_CODE (decl) == FUNCTION_DECL)
503 ? OPT_Wunused_function
504 : OPT_Wunused_variable,
505 "%q+D defined but not used", decl);
508 /* Issue appropriate warnings for the global declarations in VEC (of
509 which there are LEN). */
512 check_global_declarations (tree *vec, int len)
516 for (i = 0; i < len; i++)
517 check_global_declaration_1 (vec[i]);
520 /* Emit debugging information for all global declarations in VEC. */
523 emit_debug_global_declarations (tree *vec, int len)
527 /* Avoid confusing the debug information machinery when there are errors. */
531 timevar_push (TV_SYMOUT);
532 for (i = 0; i < len; i++)
533 debug_hooks->global_decl (vec[i]);
534 timevar_pop (TV_SYMOUT);
537 /* Compile an entire translation unit. Write a file of assembly
538 output and various debugging dumps. */
543 timevar_start (TV_PHASE_PARSING);
544 timevar_push (TV_PARSE_GLOBAL);
546 /* Call the parser, which parses the entire file (calling
547 rest_of_compilation for each function). */
548 lang_hooks.parse_file ();
550 timevar_pop (TV_PARSE_GLOBAL);
551 timevar_stop (TV_PHASE_PARSING);
553 /* Compilation is now finished except for writing
554 what's left of the symbol table output. */
556 if (flag_syntax_only || flag_wpa)
559 timevar_start (TV_PHASE_GENERATE);
561 ggc_protect_identifiers = false;
563 /* This must also call cgraph_finalize_compilation_unit. */
564 lang_hooks.decls.final_write_globals ();
568 timevar_stop (TV_PHASE_GENERATE);
572 varpool_assemble_pending_decls ();
575 /* Likewise for mudflap static object registrations. */
577 mudflap_finish_file ();
579 output_shared_constant_pool ();
580 output_object_blocks ();
582 /* Write out any pending weak symbol declarations. */
585 /* This must be at the end before unwind and debug info.
586 Some target ports emit PIC setup thunks here. */
587 targetm.asm_out.code_end ();
589 /* Do dbx symbols. */
590 timevar_push (TV_SYMOUT);
592 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
593 if (dwarf2out_do_frame ())
594 dwarf2out_frame_finish ();
597 (*debug_hooks->finish) (main_input_filename);
598 timevar_pop (TV_SYMOUT);
600 /* Output some stuff at end of file if nec. */
602 dw2_output_indirect_constants ();
604 /* Flush any pending external directives. */
605 process_pending_assemble_externals ();
607 /* Emit LTO marker if LTO info has been previously emitted. This is
608 used by collect2 to determine whether an object file contains IL.
609 We used to emit an undefined reference here, but this produces
610 link errors if an object file with IL is stored into a shared
611 library without invoking lto1. */
612 if (flag_generate_lto)
614 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
615 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
617 (unsigned HOST_WIDE_INT) 1, 8);
618 #elif defined ASM_OUTPUT_ALIGNED_COMMON
619 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
620 (unsigned HOST_WIDE_INT) 1, 8);
622 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
623 (unsigned HOST_WIDE_INT) 1,
624 (unsigned HOST_WIDE_INT) 1);
628 /* Attach a special .ident directive to the end of the file to identify
629 the version of GCC which compiled this code. The format of the .ident
630 string is patterned after the ones produced by native SVR4 compilers. */
634 const char *pkg_version = "(GNU) ";
636 if (strcmp ("(GCC) ", pkgversion_string))
637 pkg_version = pkgversion_string;
638 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
639 IDENT_ASM_OP, pkg_version, version_string);
643 /* Invoke registered plugin callbacks. */
644 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
646 /* This must be at the end. Some target ports emit end of file directives
647 into the assembly file here, and hence we can not output anything to the
648 assembly file after this point. */
649 targetm.asm_out.file_end ();
651 timevar_stop (TV_PHASE_GENERATE);
654 /* Print version information to FILE.
655 Each line begins with INDENT (for the case where FILE is the
656 assembler output file). */
659 print_version (FILE *file, const char *indent)
661 static const char fmt1[] =
663 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
665 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
668 static const char fmt2[] =
669 N_("GMP version %s, MPFR version %s, MPC version %s\n");
670 static const char fmt3[] =
671 N_("%s%swarning: %s header version %s differs from library version %s.\n");
672 static const char fmt4[] =
673 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
675 #define __VERSION__ "[?]"
678 file == stderr ? _(fmt1) : fmt1,
679 indent, *indent != 0 ? " " : "",
680 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
681 indent, __VERSION__);
683 /* We need to stringify the GMP macro values. Ugh, gmp_version has
684 two string formats, "i.j.k" and "i.j" when k is zero. As of
685 gmp-4.3.0, GMP always uses the 3 number format. */
686 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
687 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
688 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
689 #define GCC_GMP_VERSION \
690 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
691 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
692 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
693 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
695 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
696 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
697 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
700 file == stderr ? _(fmt2) : fmt2,
701 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
702 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
704 file == stderr ? _(fmt3) : fmt3,
705 indent, *indent != 0 ? " " : "",
706 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
707 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
709 file == stderr ? _(fmt3) : fmt3,
710 indent, *indent != 0 ? " " : "",
711 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
712 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
714 file == stderr ? _(fmt3) : fmt3,
715 indent, *indent != 0 ? " " : "",
716 "MPC", MPC_VERSION_STRING, mpc_get_version ());
718 file == stderr ? _(fmt4) : fmt4,
719 indent, *indent != 0 ? " " : "",
720 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
722 print_plugins_versions (file, indent);
726 print_to_asm_out_file (print_switch_type type, const char * text)
728 bool prepend_sep = true;
732 case SWITCH_TYPE_LINE_END:
733 putc ('\n', asm_out_file);
736 case SWITCH_TYPE_LINE_START:
737 fputs (ASM_COMMENT_START, asm_out_file);
738 return strlen (ASM_COMMENT_START);
740 case SWITCH_TYPE_DESCRIPTIVE:
741 if (ASM_COMMENT_START[0] == 0)
744 case SWITCH_TYPE_PASSED:
745 case SWITCH_TYPE_ENABLED:
747 fputc (' ', asm_out_file);
748 fputs (text, asm_out_file);
749 /* No need to return the length here as
750 print_single_switch has already done it. */
759 print_to_stderr (print_switch_type type, const char * text)
763 case SWITCH_TYPE_LINE_END:
767 case SWITCH_TYPE_LINE_START:
770 case SWITCH_TYPE_PASSED:
771 case SWITCH_TYPE_ENABLED:
775 case SWITCH_TYPE_DESCRIPTIVE:
776 fputs (text, stderr);
777 /* No need to return the length here as
778 print_single_switch has already done it. */
786 /* Print an option value and return the adjusted position in the line.
787 ??? print_fn doesn't handle errors, eg disk full; presumably other
788 code will catch a disk full though. */
791 print_single_switch (print_switch_fn_type print_fn,
793 print_switch_type type,
796 /* The ultrix fprintf returns 0 on success, so compute the result
797 we want here since we need it for the following test. The +1
798 is for the separator character that will probably be emitted. */
799 int len = strlen (text) + 1;
802 && pos + len > MAX_LINE)
804 print_fn (SWITCH_TYPE_LINE_END, NULL);
809 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
811 print_fn (type, text);
815 /* Print active target switches using PRINT_FN.
816 POS is the current cursor position and MAX is the size of a "line".
817 Each line begins with INDENT and ends with TERM.
818 Each switch is separated from the next by SEP. */
821 print_switch_values (print_switch_fn_type print_fn)
826 /* Fill in the -frandom-seed option, if the user didn't pass it, so
827 that it can be printed below. This helps reproducibility. */
828 if (!flag_random_seed)
831 /* Print the options as passed. */
832 pos = print_single_switch (print_fn, pos,
833 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
835 for (j = 1; j < save_decoded_options_count; j++)
837 switch (save_decoded_options[j].opt_index)
850 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED,
851 save_decoded_options[j].orig_option_with_args_text);
855 print_fn (SWITCH_TYPE_LINE_END, NULL);
857 /* Print the -f and -m options that have been enabled.
858 We don't handle language specific options but printing argv
860 pos = print_single_switch (print_fn, 0,
861 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
863 for (j = 0; j < cl_options_count; j++)
864 if (cl_options[j].cl_report
865 && option_enabled (j, &global_options) > 0)
866 pos = print_single_switch (print_fn, pos,
867 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
869 print_fn (SWITCH_TYPE_LINE_END, NULL);
872 /* Open assembly code output file. Do this even if -fsyntax-only is
873 on, because then the driver will have provided the name of a
874 temporary file or bit bucket for us. NAME is the file specified on
875 the command line, possibly NULL. */
877 init_asm_output (const char *name)
879 if (name == NULL && asm_file_name == 0)
880 asm_out_file = stdout;
883 if (asm_file_name == 0)
885 int len = strlen (dump_base_name);
886 char *dumpname = XNEWVEC (char, len + 6);
888 memcpy (dumpname, dump_base_name, len + 1);
889 strip_off_ending (dumpname, len);
890 strcat (dumpname, ".s");
891 asm_file_name = dumpname;
893 if (!strcmp (asm_file_name, "-"))
894 asm_out_file = stdout;
896 asm_out_file = fopen (asm_file_name, "w+b");
897 if (asm_out_file == 0)
898 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
901 if (!flag_syntax_only)
903 targetm.asm_out.file_start ();
905 if (flag_record_gcc_switches)
907 if (targetm.asm_out.record_gcc_switches)
909 /* Let the target know that we are about to start recording. */
910 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
912 /* Now record the switches. */
913 print_switch_values (targetm.asm_out.record_gcc_switches);
914 /* Let the target know that the recording is over. */
915 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
919 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
922 if (flag_verbose_asm)
924 /* Print the list of switches in effect
925 into the assembler file as comments. */
926 print_version (asm_out_file, ASM_COMMENT_START);
927 print_switch_values (print_to_asm_out_file);
928 putc ('\n', asm_out_file);
933 /* Default tree printer. Handles declarations only. */
935 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
936 int precision, bool wide, bool set_locus, bool hash)
940 /* FUTURE: %+x should set the locus. */
941 if (precision != 0 || wide || hash)
947 t = va_arg (*text->args_ptr, tree);
948 if (TREE_CODE (t) == IDENTIFIER_NODE)
950 pp_identifier (pp, IDENTIFIER_POINTER (t));
956 t = va_arg (*text->args_ptr, tree);
957 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
958 t = DECL_DEBUG_EXPR (t);
963 t = va_arg (*text->args_ptr, tree);
967 percent_K_format (text);
974 if (set_locus && text->locus)
975 *text->locus = DECL_SOURCE_LOCATION (t);
979 const char *n = DECL_NAME (t)
980 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
985 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
990 /* A helper function; used as the reallocator function for cpp's line
993 realloc_for_line_map (void *ptr, size_t len)
995 return GGC_RESIZEVAR (void, ptr, len);
998 /* A helper function: used as the allocator function for
999 identifier_to_locale. */
1001 alloc_for_identifier_to_locale (size_t len)
1003 return ggc_alloc_atomic (len);
1006 /* Output stack usage information. */
1008 output_stack_usage (void)
1010 static bool warning_issued = false;
1011 enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED };
1012 const char *stack_usage_kind_str[] = {
1017 HOST_WIDE_INT stack_usage = current_function_static_stack_size;
1018 enum stack_usage_kind_type stack_usage_kind;
1020 if (stack_usage < 0)
1022 if (!warning_issued)
1024 warning (0, "stack usage computation not supported for this target");
1025 warning_issued = true;
1030 stack_usage_kind = STATIC;
1032 /* Add the maximum amount of space pushed onto the stack. */
1033 if (current_function_pushed_stack_size > 0)
1035 stack_usage += current_function_pushed_stack_size;
1036 stack_usage_kind = DYNAMIC_BOUNDED;
1039 /* Now on to the tricky part: dynamic stack allocation. */
1040 if (current_function_allocates_dynamic_stack_space)
1042 if (current_function_has_unbounded_dynamic_stack_size)
1043 stack_usage_kind = DYNAMIC;
1045 stack_usage_kind = DYNAMIC_BOUNDED;
1047 /* Add the size even in the unbounded case, this can't hurt. */
1048 stack_usage += current_function_dynamic_stack_size;
1051 if (flag_stack_usage)
1053 expanded_location loc
1054 = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
1055 const char *raw_id, *id;
1057 /* Strip the scope prefix if any. */
1058 raw_id = lang_hooks.decl_printable_name (current_function_decl, 2);
1059 id = strrchr (raw_id, '.');
1065 fprintf (stack_usage_file,
1066 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC"\t%s\n",
1067 lbasename (loc.file),
1072 stack_usage_kind_str[stack_usage_kind]);
1075 if (warn_stack_usage >= 0)
1077 if (stack_usage_kind == DYNAMIC)
1078 warning (OPT_Wstack_usage_, "stack usage might be unbounded");
1079 else if (stack_usage > warn_stack_usage)
1081 if (stack_usage_kind == DYNAMIC_BOUNDED)
1082 warning (OPT_Wstack_usage_, "stack usage might be %wd bytes",
1085 warning (OPT_Wstack_usage_, "stack usage is %wd bytes",
1091 /* Open an auxiliary output file. */
1093 open_auxiliary_file (const char *ext)
1098 filename = concat (aux_base_name, ".", ext, NULL);
1099 file = fopen (filename, "w");
1101 fatal_error ("can%'t open %s for writing: %m", filename);
1106 /* Initialization of the front end environment, before command line
1107 options are parsed. Signal handlers, internationalization etc.
1108 ARGV0 is main's argv[0]. */
1110 general_init (const char *argv0)
1114 p = argv0 + strlen (argv0);
1115 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1119 xmalloc_set_program_name (progname);
1123 /* Unlock the stdio streams. */
1124 unlock_std_streams ();
1126 gcc_init_libintl ();
1128 identifier_to_locale_alloc = alloc_for_identifier_to_locale;
1129 identifier_to_locale_free = ggc_free;
1131 /* Initialize the diagnostics reporting machinery, so option parsing
1132 can give warnings and errors. */
1133 diagnostic_initialize (global_dc, N_OPTS);
1134 diagnostic_starter (global_dc) = default_tree_diagnostic_starter;
1135 /* Set a default printer. Language specific initializations will
1136 override it later. */
1137 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1138 global_dc->show_option_requested
1139 = global_options_init.x_flag_diagnostics_show_option;
1140 global_dc->show_column
1141 = global_options_init.x_flag_show_column;
1142 global_dc->internal_error = plugins_internal_error_function;
1143 global_dc->option_enabled = option_enabled;
1144 global_dc->option_state = &global_options;
1145 global_dc->option_name = option_name;
1147 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1149 signal (SIGSEGV, crash_signal);
1152 signal (SIGILL, crash_signal);
1155 signal (SIGBUS, crash_signal);
1158 signal (SIGABRT, crash_signal);
1160 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1161 signal (SIGIOT, crash_signal);
1164 signal (SIGFPE, crash_signal);
1167 /* Other host-specific signal setup. */
1168 (*host_hooks.extra_signals)();
1170 /* Initialize the garbage-collector, string pools and tree type hash
1174 line_table = ggc_alloc_line_maps ();
1175 linemap_init (line_table);
1176 line_table->reallocator = realloc_for_line_map;
1179 /* Initialize register usage now so switches may override. */
1182 /* Register the language-independent parameters. */
1183 global_init_params ();
1185 /* This must be done after global_init_params but before argument
1187 init_ggc_heuristics();
1188 init_optimization_passes ();
1189 statistics_early_init ();
1193 /* Return true if the current target supports -fsection-anchors. */
1196 target_supports_section_anchors_p (void)
1198 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1201 if (targetm.asm_out.output_anchor == NULL)
1207 /* Default the align_* variables to 1 if they're still unset, and
1208 set up the align_*_log variables. */
1210 init_alignments (void)
1212 if (align_loops <= 0)
1214 if (align_loops_max_skip > align_loops)
1215 align_loops_max_skip = align_loops - 1;
1216 align_loops_log = floor_log2 (align_loops * 2 - 1);
1217 if (align_jumps <= 0)
1219 if (align_jumps_max_skip > align_jumps)
1220 align_jumps_max_skip = align_jumps - 1;
1221 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1222 if (align_labels <= 0)
1224 align_labels_log = floor_log2 (align_labels * 2 - 1);
1225 if (align_labels_max_skip > align_labels)
1226 align_labels_max_skip = align_labels - 1;
1227 if (align_functions <= 0)
1228 align_functions = 1;
1229 align_functions_log = floor_log2 (align_functions * 2 - 1);
1232 /* Process the options that have been parsed. */
1234 process_options (void)
1236 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1237 This can happen with incorrect pre-processed input. */
1238 debug_hooks = &do_nothing_debug_hooks;
1240 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;
1242 /* Allow the front end to perform consistency checks and do further
1243 initialization based on the command line options. This hook also
1244 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1245 so we can correctly initialize debug output. */
1246 no_backend = lang_hooks.post_options (&main_input_filename);
1248 /* Some machines may reject certain combinations of options. */
1249 targetm.target_option.override ();
1251 /* Avoid any informative notes in the second run of -fcompare-debug. */
1252 if (flag_compare_debug)
1253 diagnostic_inhibit_notes (global_dc);
1255 if (flag_section_anchors && !target_supports_section_anchors_p ())
1257 warning (OPT_fsection_anchors,
1258 "this target does not support %qs", "-fsection-anchors");
1259 flag_section_anchors = 0;
1262 if (flag_short_enums == 2)
1263 flag_short_enums = targetm.default_short_enums ();
1265 /* Set aux_base_name if not already set. */
1268 else if (main_input_filename)
1270 char *name = xstrdup (lbasename (main_input_filename));
1272 strip_off_ending (name, strlen (name));
1273 aux_base_name = name;
1276 aux_base_name = "gccaux";
1280 || flag_graphite_identity
1282 || flag_loop_flatten
1283 || flag_loop_interchange
1284 || flag_loop_strip_mine
1285 || flag_loop_parallelize_all)
1286 sorry ("Graphite loop optimizations cannot be used (-fgraphite, "
1287 "-fgraphite-identity, -floop-block, -floop-flatten, "
1288 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1289 "and -ftree-loop-linear)");
1292 /* Unrolling all loops implies that standard loop unrolling must also
1294 if (flag_unroll_all_loops)
1295 flag_unroll_loops = 1;
1297 /* web and rename-registers help when run after loop unrolling. */
1298 if (flag_web == AUTODETECT_VALUE)
1299 flag_web = flag_unroll_loops || flag_peel_loops;
1301 if (flag_rename_registers == AUTODETECT_VALUE)
1302 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1304 if (flag_non_call_exceptions)
1305 flag_asynchronous_unwind_tables = 1;
1306 if (flag_asynchronous_unwind_tables)
1307 flag_unwind_tables = 1;
1309 if (flag_value_profile_transformations)
1310 flag_profile_values = 1;
1312 /* Warn about options that are not supported on this machine. */
1313 #ifndef INSN_SCHEDULING
1314 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1315 warning (0, "instruction scheduling not supported on this target machine");
1318 if (flag_delayed_branch)
1319 warning (0, "this target machine does not have delayed branches");
1322 user_label_prefix = USER_LABEL_PREFIX;
1323 if (flag_leading_underscore != -1)
1325 /* If the default prefix is more complicated than "" or "_",
1326 issue a warning and ignore this option. */
1327 if (user_label_prefix[0] == 0 ||
1328 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1330 user_label_prefix = flag_leading_underscore ? "_" : "";
1333 warning (0, "-f%sleading-underscore not supported on this target machine",
1334 flag_leading_underscore ? "" : "no-");
1337 /* If we are in verbose mode, write out the version and maybe all the
1338 option flags in use. */
1341 print_version (stderr, "");
1343 print_switch_values (print_to_stderr);
1346 if (flag_syntax_only)
1348 write_symbols = NO_DEBUG;
1354 if (debug_info_level == DINFO_LEVEL_NONE)
1356 debug_info_level = DINFO_LEVEL_NORMAL;
1358 if (write_symbols == NO_DEBUG)
1359 write_symbols = PREFERRED_DEBUGGING_TYPE;
1362 debug_info_level = DINFO_LEVEL_NONE;
1365 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1367 FILE *final_output = fopen (flag_dump_final_insns, "w");
1370 error ("could not open final insn dump file %qs: %m",
1371 flag_dump_final_insns);
1372 flag_dump_final_insns = NULL;
1374 else if (fclose (final_output))
1376 error ("could not close zeroed insn dump file %qs: %m",
1377 flag_dump_final_insns);
1378 flag_dump_final_insns = NULL;
1382 /* Unless over-ridden for the target, assume that all DWARF levels
1383 may be emitted, if DWARF2_DEBUG is selected. */
1384 if (dwarf_strict < 0)
1387 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1389 if (debug_info_level == DINFO_LEVEL_NONE)
1390 write_symbols = NO_DEBUG;
1392 if (write_symbols == NO_DEBUG)
1394 #if defined(DBX_DEBUGGING_INFO)
1395 else if (write_symbols == DBX_DEBUG)
1396 debug_hooks = &dbx_debug_hooks;
1398 #if defined(XCOFF_DEBUGGING_INFO)
1399 else if (write_symbols == XCOFF_DEBUG)
1400 debug_hooks = &xcoff_debug_hooks;
1402 #ifdef SDB_DEBUGGING_INFO
1403 else if (write_symbols == SDB_DEBUG)
1404 debug_hooks = &sdb_debug_hooks;
1406 #ifdef DWARF2_DEBUGGING_INFO
1407 else if (write_symbols == DWARF2_DEBUG)
1408 debug_hooks = &dwarf2_debug_hooks;
1410 #ifdef VMS_DEBUGGING_INFO
1411 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1412 debug_hooks = &vmsdbg_debug_hooks;
1415 error ("target system does not support the \"%s\" debug format",
1416 debug_type_names[write_symbols]);
1418 /* We know which debug output will be used so we can set flag_var_tracking
1419 and flag_var_tracking_uninit if the user has not specified them. */
1420 if (debug_info_level < DINFO_LEVEL_NORMAL
1421 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1423 if (flag_var_tracking == 1
1424 || flag_var_tracking_uninit == 1)
1426 if (debug_info_level < DINFO_LEVEL_NORMAL)
1427 warning (0, "variable tracking requested, but useless unless "
1428 "producing debug info");
1430 warning (0, "variable tracking requested, but not supported "
1431 "by this debug format");
1433 flag_var_tracking = 0;
1434 flag_var_tracking_uninit = 0;
1437 /* The debug hooks are used to implement -fdump-go-spec because it
1438 gives a simple and stable API for all the information we need to
1440 if (flag_dump_go_spec != NULL)
1441 debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks);
1443 /* If the user specifically requested variable tracking with tagging
1444 uninitialized variables, we need to turn on variable tracking.
1445 (We already determined above that variable tracking is feasible.) */
1446 if (flag_var_tracking_uninit)
1447 flag_var_tracking = 1;
1449 if (flag_var_tracking == AUTODETECT_VALUE)
1450 flag_var_tracking = optimize >= 1;
1452 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
1453 flag_var_tracking_assignments = flag_var_tracking
1454 && !(flag_selective_scheduling || flag_selective_scheduling2);
1456 if (flag_var_tracking_assignments_toggle)
1457 flag_var_tracking_assignments = !flag_var_tracking_assignments;
1459 if (flag_var_tracking_assignments && !flag_var_tracking)
1460 flag_var_tracking = flag_var_tracking_assignments = -1;
1462 if (flag_var_tracking_assignments
1463 && (flag_selective_scheduling || flag_selective_scheduling2))
1464 warning (0, "var-tracking-assignments changes selective scheduling");
1466 if (flag_tree_cselim == AUTODETECT_VALUE)
1467 #ifdef HAVE_conditional_move
1468 flag_tree_cselim = 1;
1470 flag_tree_cselim = 0;
1473 /* If auxiliary info generation is desired, open the output file.
1474 This goes in the same directory as the source file--unlike
1475 all the other output files. */
1476 if (flag_gen_aux_info)
1478 aux_info_file = fopen (aux_info_file_name, "w");
1479 if (aux_info_file == 0)
1480 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1483 if (!targetm_common.have_named_sections)
1485 if (flag_function_sections)
1487 warning (0, "-ffunction-sections not supported for this target");
1488 flag_function_sections = 0;
1490 if (flag_data_sections)
1492 warning (0, "-fdata-sections not supported for this target");
1493 flag_data_sections = 0;
1497 if (flag_function_sections && profile_flag)
1499 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1500 flag_function_sections = 0;
1503 #ifndef HAVE_prefetch
1504 if (flag_prefetch_loop_arrays > 0)
1506 warning (0, "-fprefetch-loop-arrays not supported for this target");
1507 flag_prefetch_loop_arrays = 0;
1510 if (flag_prefetch_loop_arrays > 0 && !HAVE_prefetch)
1512 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1513 flag_prefetch_loop_arrays = 0;
1517 /* This combination of options isn't handled for i386 targets and doesn't
1518 make much sense anyway, so don't allow it. */
1519 if (flag_prefetch_loop_arrays > 0 && optimize_size)
1521 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1522 flag_prefetch_loop_arrays = 0;
1525 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1526 if (flag_signaling_nans)
1527 flag_trapping_math = 1;
1529 /* We cannot reassociate if we want traps or signed zeros. */
1530 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1532 warning (0, "-fassociative-math disabled; other options take precedence");
1533 flag_associative_math = 0;
1536 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1537 if (flag_cx_limited_range)
1538 flag_complex_method = 0;
1540 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1541 if (flag_cx_fortran_rules)
1542 flag_complex_method = 1;
1544 /* Targets must be able to place spill slots at lower addresses. If the
1545 target already uses a soft frame pointer, the transition is trivial. */
1546 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1548 warning (0, "-fstack-protector not supported for this target");
1549 flag_stack_protect = 0;
1551 if (!flag_stack_protect)
1552 warn_stack_protect = 0;
1554 /* ??? Unwind info is not correct around the CFG unless either a frame
1555 pointer is present or A_O_A is set. Fixing this requires rewriting
1556 unwind info generation to be aware of the CFG and propagating states
1558 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1559 && flag_omit_frame_pointer)
1561 warning (0, "unwind tables currently require a frame pointer "
1563 flag_omit_frame_pointer = 0;
1566 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1567 have not been set. */
1568 if (!global_options_set.x_warnings_are_errors
1569 && warn_coverage_mismatch
1570 && (global_dc->classify_diagnostic[OPT_Wcoverage_mismatch] ==
1572 diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_mismatch,
1573 DK_ERROR, UNKNOWN_LOCATION);
1575 /* Save the current optimization options. */
1576 optimization_default_node = build_optimization_node ();
1577 optimization_current_node = optimization_default_node;
1580 /* This function can be called multiple times to reinitialize the compiler
1581 back end when register classes or instruction sets have changed,
1582 before each function. */
1584 backend_init_target (void)
1586 /* Initialize alignment variables. */
1589 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1590 to initialize reg_raw_mode[]. */
1593 /* This invokes target hooks to set fixed_reg[] etc, which is
1597 /* This depends on stack_pointer_rtx. */
1598 init_fake_stack_mems ();
1600 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1602 init_alias_target ();
1604 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1607 /* The following initialization functions need to generate rtl, so
1608 provide a dummy function context for them. */
1609 init_dummy_function_start ();
1611 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1612 on a mode change. */
1615 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1616 after a mode change as well. */
1617 caller_save_initialized_p = false;
1619 expand_dummy_function_end ();
1622 /* Initialize the compiler back end. This function is called only once,
1623 when starting the compiler. */
1630 init_inline_once ();
1631 init_varasm_once ();
1632 save_register_info ();
1634 /* Initialize the target-specific back end pieces. */
1636 backend_init_target ();
1639 /* Initialize excess precision settings. */
1641 init_excess_precision (void)
1643 /* Adjust excess precision handling based on the target options. If
1644 the front end cannot handle it, flag_excess_precision_cmdline
1645 will already have been set accordingly in the post_options
1647 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
1648 flag_excess_precision = flag_excess_precision_cmdline;
1649 if (flag_unsafe_math_optimizations)
1650 flag_excess_precision = EXCESS_PRECISION_FAST;
1651 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
1653 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
1654 switch (flt_eval_method)
1658 /* Either the target acts unpredictably (-1) or has all the
1659 operations required not to have excess precision (0). */
1660 flag_excess_precision = EXCESS_PRECISION_FAST;
1664 /* In these cases, predictable excess precision makes
1668 /* Any other implementation-defined FLT_EVAL_METHOD values
1669 require the compiler to handle the associated excess
1670 precision rules in excess_precision_type. */
1676 /* Initialize things that are both lang-dependent and target-dependent.
1677 This function can be called more than once if target parameters change. */
1679 lang_dependent_init_target (void)
1681 /* This determines excess precision settings. */
1682 init_excess_precision ();
1684 /* This creates various _DECL nodes, so needs to be called after the
1685 front end is initialized. It also depends on the HAVE_xxx macros
1686 generated from the target machine description. */
1689 /* The following initialization functions need to generate rtl, so
1690 provide a dummy function context for them. */
1691 init_dummy_function_start ();
1693 /* Do the target-specific parts of expr initialization. */
1694 init_expr_target ();
1696 /* Although the actions of these functions are language-independent,
1697 they use optabs, so we cannot call them from backend_init. */
1701 expand_dummy_function_end ();
1704 /* Language-dependent initialization. Returns nonzero on success. */
1706 lang_dependent_init (const char *name)
1708 location_t save_loc = input_location;
1709 if (dump_base_name == 0)
1710 dump_base_name = name && name[0] ? name : "gccdump";
1712 /* Other front-end initialization. */
1713 input_location = BUILTINS_LOCATION;
1714 if (lang_hooks.init () == 0)
1716 input_location = save_loc;
1720 init_asm_output (name);
1722 /* If stack usage information is desired, open the output file. */
1723 if (flag_stack_usage)
1724 stack_usage_file = open_auxiliary_file ("su");
1727 /* This creates various _DECL nodes, so needs to be called after the
1728 front end is initialized. */
1731 /* Do the target-specific parts of the initialization. */
1732 lang_dependent_init_target ();
1736 /* If dbx symbol table desired, initialize writing it and output the
1737 predefined types. */
1738 timevar_push (TV_SYMOUT);
1740 /* Now we have the correct original filename, we can initialize
1742 (*debug_hooks->init) (name);
1744 timevar_pop (TV_SYMOUT);
1751 /* Reinitialize everything when target parameters, such as register usage,
1754 target_reinit (void)
1756 struct rtl_data saved_x_rtl;
1757 rtx *saved_regno_reg_rtx;
1759 /* Save *crtl and regno_reg_rtx around the reinitialization
1760 to allow target_reinit being called even after prepare_function_start. */
1761 saved_regno_reg_rtx = regno_reg_rtx;
1762 if (saved_regno_reg_rtx)
1764 saved_x_rtl = *crtl;
1765 memset (crtl, '\0', sizeof (*crtl));
1766 regno_reg_rtx = NULL;
1769 /* Reinitialize RTL backend. */
1770 backend_init_target ();
1772 /* Reinitialize lang-dependent parts. */
1773 lang_dependent_init_target ();
1775 /* And restore it at the end, as free_after_compilation from
1776 expand_dummy_function_end clears it. */
1777 if (saved_regno_reg_rtx)
1779 *crtl = saved_x_rtl;
1780 regno_reg_rtx = saved_regno_reg_rtx;
1781 saved_regno_reg_rtx = NULL;
1786 dump_memory_report (bool final)
1788 ggc_print_statistics ();
1789 stringpool_statistics ();
1790 dump_tree_statistics ();
1791 dump_gimple_statistics ();
1792 dump_rtx_statistics ();
1793 dump_alloc_pool_statistics ();
1794 dump_bitmap_statistics ();
1795 dump_vec_loc_statistics ();
1796 dump_ggc_loc_statistics (final);
1797 dump_alias_stats (stderr);
1798 dump_pta_stats (stderr);
1801 /* Clean up: close opened files, etc. */
1804 finalize (bool no_backend)
1806 /* Close the dump files. */
1807 if (flag_gen_aux_info)
1809 fclose (aux_info_file);
1811 unlink (aux_info_file_name);
1814 /* Close non-debugging input and output files. Take special care to note
1815 whether fclose returns an error, since the pages might still be on the
1816 buffer chain while the file is open. */
1820 if (ferror (asm_out_file) != 0)
1821 fatal_error ("error writing to %s: %m", asm_file_name);
1822 if (fclose (asm_out_file) != 0)
1823 fatal_error ("error closing %s: %m", asm_file_name);
1826 if (stack_usage_file)
1827 fclose (stack_usage_file);
1833 finish_optimization_passes ();
1839 dump_memory_report (true);
1841 /* Language-specific end of compilation actions. */
1842 lang_hooks.finish ();
1845 /* Initialize the compiler, and compile the input file. */
1849 /* Initialize timing first. The C front ends read the main file in
1850 the post_options hook, and C++ does file timings. */
1851 if (time_report || !quiet_flag || flag_detailed_statistics)
1853 timevar_start (TV_TOTAL);
1857 /* Don't do any more if an error has already occurred. */
1860 timevar_start (TV_PHASE_SETUP);
1862 /* This must be run always, because it is needed to compute the FP
1863 predefined macros, such as __LDBL_MAX__, for targets using non
1864 default FP formats. */
1865 init_adjust_machine_modes ();
1867 /* Set up the back-end if requested. */
1871 /* Language-dependent initialization. Returns true on success. */
1872 if (lang_dependent_init (main_input_filename))
1874 /* Initialize yet another pass. */
1876 ggc_protect_identifiers = true;
1879 init_final (main_input_filename);
1880 coverage_init (aux_base_name);
1882 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
1884 timevar_stop (TV_PHASE_SETUP);
1890 timevar_stop (TV_PHASE_SETUP);
1893 timevar_start (TV_PHASE_FINALIZE);
1895 finalize (no_backend);
1897 timevar_stop (TV_PHASE_FINALIZE);
1900 /* Stop timing and print the times. */
1901 timevar_stop (TV_TOTAL);
1902 timevar_print (stderr);
1905 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1906 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1907 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1909 It is not safe to call this function more than once. */
1912 toplev_main (int argc, char **argv)
1914 /* Parsing and gimplification sometimes need quite large stack.
1915 Increase stack size limits if possible. */
1916 stack_limit_increase (64 * 1024 * 1024);
1918 expandargv (&argc, &argv);
1920 /* Initialization of GCC's environment, and diagnostics. */
1921 general_init (argv[0]);
1923 /* One-off initialization of options that does not need to be
1924 repeated when options are added for particular functions. */
1925 init_options_once ();
1927 /* Initialize global options structures; this must be repeated for
1928 each structure used for parsing options. */
1929 init_options_struct (&global_options, &global_options_set);
1930 lang_hooks.init_options_struct (&global_options);
1932 /* Convert the options to an array. */
1933 decode_cmdline_options_to_array_default_mask (argc,
1934 CONST_CAST2 (const char **,
1936 &save_decoded_options,
1937 &save_decoded_options_count);
1939 /* Perform language-specific options initialization. */
1940 lang_hooks.init_options (save_decoded_options_count, save_decoded_options);
1942 /* Parse the options and do minimal processing; basically just
1943 enough to default flags appropriately. */
1944 decode_options (&global_options, &global_options_set,
1945 save_decoded_options, save_decoded_options_count,
1946 UNKNOWN_LOCATION, global_dc);
1948 handle_common_deferred_options ();
1952 initialize_plugins ();
1955 print_version (stderr, "");
1958 print_plugins_help (stderr, "");
1960 /* Exit early if we can (e.g. -help). */
1961 if (!exit_after_options)
1964 if (warningcount || errorcount)
1965 print_ignored_options ();
1966 diagnostic_finish (global_dc);
1968 /* Invoke registered plugin callbacks if any. */
1969 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
1971 finalize_plugins ();
1973 return (FATAL_EXIT_CODE);
1975 return (SUCCESS_EXIT_CODE);