Add initial version of C++17 <memory_resource> header
[official-gcc.git] / gcc / toplev.c
blobf23e8aeb17b288d804f726aa5a25e4b32a334381
1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2018 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* This is the top level of cc1/c++.
21 It parses command args, opens files, invokes the various passes
22 in the proper order, and counts the time used by each.
23 Error messages and low-level interface to malloc also handled here. */
25 #include "config.h"
26 #include "system.h"
27 #include "coretypes.h"
28 #include "backend.h"
29 #include "target.h"
30 #include "rtl.h"
31 #include "tree.h"
32 #include "gimple.h"
33 #include "alloc-pool.h"
34 #include "timevar.h"
35 #include "memmodel.h"
36 #include "tm_p.h"
37 #include "optabs-libfuncs.h"
38 #include "insn-config.h"
39 #include "ira.h"
40 #include "recog.h"
41 #include "cgraph.h"
42 #include "coverage.h"
43 #include "diagnostic.h"
44 #include "varasm.h"
45 #include "tree-inline.h"
46 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
47 #include "version.h"
48 #include "flags.h"
49 #include "insn-attr.h"
50 #include "output.h"
51 #include "toplev.h"
52 #include "expr.h"
53 #include "intl.h"
54 #include "tree-diagnostic.h"
55 #include "params.h"
56 #include "reload.h"
57 #include "lra.h"
58 #include "dwarf2asm.h"
59 #include "debug.h"
60 #include "common/common-target.h"
61 #include "langhooks.h"
62 #include "cfgloop.h" /* for init_set_costs */
63 #include "hosthooks.h"
64 #include "opts.h"
65 #include "opts-diagnostic.h"
66 #include "stringpool.h"
67 #include "attribs.h"
68 #include "asan.h"
69 #include "tsan.h"
70 #include "plugin.h"
71 #include "context.h"
72 #include "pass_manager.h"
73 #include "auto-profile.h"
74 #include "dwarf2out.h"
75 #include "ipa-reference.h"
76 #include "symbol-summary.h"
77 #include "tree-vrp.h"
78 #include "ipa-prop.h"
79 #include "gcse.h"
80 #include "omp-offload.h"
81 #include "hsa-common.h"
82 #include "edit-context.h"
83 #include "tree-pass.h"
84 #include "dumpfile.h"
85 #include "ipa-fnsummary.h"
86 #include "optinfo-emit-json.h"
88 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
89 #include "dbxout.h"
90 #endif
92 #ifdef XCOFF_DEBUGGING_INFO
93 #include "xcoffout.h" /* Needed for external data declarations. */
94 #endif
96 #include "selftest.h"
98 #ifdef HAVE_isl
99 #include <isl/version.h>
100 #endif
102 static void general_init (const char *, bool);
103 static void do_compile ();
104 static void process_options (void);
105 static void backend_init (void);
106 static int lang_dependent_init (const char *);
107 static void init_asm_output (const char *);
108 static void finalize (bool);
110 static void crash_signal (int) ATTRIBUTE_NORETURN;
111 static void compile_file (void);
113 /* True if we don't need a backend (e.g. preprocessing only). */
114 static bool no_backend;
116 /* Length of line when printing switch values. */
117 #define MAX_LINE 75
119 /* Decoded options, and number of such options. */
120 struct cl_decoded_option *save_decoded_options;
121 unsigned int save_decoded_options_count;
123 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
124 to optimize in process_options (). */
125 #define AUTODETECT_VALUE 2
127 /* Debug hooks - dependent upon command line options. */
129 const struct gcc_debug_hooks *debug_hooks;
131 /* The FUNCTION_DECL for the function currently being compiled,
132 or 0 if between functions. */
133 tree current_function_decl;
135 /* Set to the FUNC_BEGIN label of the current function, or NULL
136 if none. */
137 const char * current_function_func_begin_label;
139 /* A random sequence of characters, unless overridden by user. */
140 static const char *flag_random_seed;
142 /* A local time stamp derived from the time of compilation. It will be
143 zero if the system cannot provide a time. It will be -1u, if the
144 user has specified a particular random seed. */
145 unsigned local_tick;
147 /* Random number for this compilation */
148 HOST_WIDE_INT random_seed;
150 /* -f flags. */
152 /* When non-NULL, indicates that whenever space is allocated on the
153 stack, the resulting stack pointer must not pass this
154 address---that is, for stacks that grow downward, the stack pointer
155 must always be greater than or equal to this address; for stacks
156 that grow upward, the stack pointer must be less than this address.
157 At present, the rtx may be either a REG or a SYMBOL_REF, although
158 the support provided depends on the backend. */
159 rtx stack_limit_rtx;
161 struct target_flag_state default_target_flag_state;
162 #if SWITCHABLE_TARGET
163 struct target_flag_state *this_target_flag_state = &default_target_flag_state;
164 #else
165 #define this_target_flag_state (&default_target_flag_state)
166 #endif
168 /* The user symbol prefix after having resolved same. */
169 const char *user_label_prefix;
171 /* Output files for assembler code (real compiler output)
172 and debugging dumps. */
174 FILE *asm_out_file;
175 FILE *aux_info_file;
176 FILE *stack_usage_file = NULL;
178 /* The current working directory of a translation. It's generally the
179 directory from which compilation was initiated, but a preprocessed
180 file may specify the original directory in which it was
181 created. */
183 static const char *src_pwd;
185 /* Initialize src_pwd with the given string, and return true. If it
186 was already initialized, return false. As a special case, it may
187 be called with a NULL argument to test whether src_pwd has NOT been
188 initialized yet. */
190 bool
191 set_src_pwd (const char *pwd)
193 if (src_pwd)
195 if (strcmp (src_pwd, pwd) == 0)
196 return true;
197 else
198 return false;
201 src_pwd = xstrdup (pwd);
202 return true;
205 /* Return the directory from which the translation unit was initiated,
206 in case set_src_pwd() was not called before to assign it a
207 different value. */
209 const char *
210 get_src_pwd (void)
212 if (! src_pwd)
214 src_pwd = getpwd ();
215 if (!src_pwd)
216 src_pwd = ".";
219 return src_pwd;
222 /* Called when the start of a function definition is parsed,
223 this function prints on stderr the name of the function. */
224 void
225 announce_function (tree decl)
227 if (!quiet_flag)
229 if (rtl_dump_and_exit)
230 fprintf (stderr, "%s ",
231 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
232 else
233 fprintf (stderr, " %s",
234 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
235 fflush (stderr);
236 pp_needs_newline (global_dc->printer) = true;
237 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
241 /* Initialize local_tick with the time of day, or -1 if
242 flag_random_seed is set. */
244 static void
245 init_local_tick (void)
247 if (!flag_random_seed)
249 #ifdef HAVE_GETTIMEOFDAY
251 struct timeval tv;
253 gettimeofday (&tv, NULL);
254 local_tick = (unsigned) tv.tv_sec * 1000 + tv.tv_usec / 1000;
256 #else
258 time_t now = time (NULL);
260 if (now != (time_t)-1)
261 local_tick = (unsigned) now;
263 #endif
265 else
266 local_tick = -1;
269 /* Obtain the random_seed. Unless NOINIT, initialize it if
270 it's not provided in the command line. */
272 HOST_WIDE_INT
273 get_random_seed (bool noinit)
275 if (!random_seed && !noinit)
277 int fd = open ("/dev/urandom", O_RDONLY);
278 if (fd >= 0)
280 if (read (fd, &random_seed, sizeof (random_seed))
281 != sizeof (random_seed))
282 random_seed = 0;
283 close (fd);
285 if (!random_seed)
286 random_seed = local_tick ^ getpid ();
288 return random_seed;
291 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */
293 void
294 set_random_seed (const char *val)
296 flag_random_seed = val;
297 if (flag_random_seed)
299 char *endp;
301 /* When the driver passed in a hex number don't crc it again */
302 random_seed = strtoul (flag_random_seed, &endp, 0);
303 if (!(endp > flag_random_seed && *endp == 0))
304 random_seed = crc32_string (0, flag_random_seed);
308 /* Handler for fatal signals, such as SIGSEGV. These are transformed
309 into ICE messages, which is much more user friendly. In case the
310 error printer crashes, reset the signal to prevent infinite recursion. */
312 static void
313 crash_signal (int signo)
315 signal (signo, SIG_DFL);
317 /* If we crashed while processing an ASM statement, then be a little more
318 graceful. It's most likely the user's fault. */
319 if (this_is_asm_operands)
321 output_operand_lossage ("unrecoverable error");
322 exit (FATAL_EXIT_CODE);
325 internal_error ("%s", strsignal (signo));
328 /* A subroutine of wrapup_global_declarations. We've come to the end of
329 the compilation unit. All deferred variables should be undeferred,
330 and all incomplete decls should be finalized. */
332 void
333 wrapup_global_declaration_1 (tree decl)
335 /* We're not deferring this any longer. Assignment is conditional to
336 avoid needlessly dirtying PCH pages. */
337 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
338 && DECL_DEFER_OUTPUT (decl) != 0)
339 DECL_DEFER_OUTPUT (decl) = 0;
341 if (VAR_P (decl) && DECL_SIZE (decl) == 0)
342 lang_hooks.finish_incomplete_decl (decl);
345 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
346 needs to be output. Return true if it is output. */
348 bool
349 wrapup_global_declaration_2 (tree decl)
351 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl)
352 || (VAR_P (decl) && DECL_HAS_VALUE_EXPR_P (decl)))
353 return false;
355 /* Don't write out static consts, unless we still need them.
357 We also keep static consts if not optimizing (for debugging),
358 unless the user specified -fno-keep-static-consts.
359 ??? They might be better written into the debug information.
360 This is possible when using DWARF.
362 A language processor that wants static constants to be always
363 written out (even if it is not used) is responsible for
364 calling rest_of_decl_compilation itself. E.g. the C front-end
365 calls rest_of_decl_compilation from finish_decl.
366 One motivation for this is that is conventional in some
367 environments to write things like:
368 static const char rcsid[] = "... version string ...";
369 intending to force the string to be in the executable.
371 A language processor that would prefer to have unneeded
372 static constants "optimized away" would just defer writing
373 them out until here. E.g. C++ does this, because static
374 constants are often defined in header files.
376 ??? A tempting alternative (for both C and C++) would be
377 to force a constant to be written if and only if it is
378 defined in a main file, as opposed to an include file. */
380 if (VAR_P (decl) && TREE_STATIC (decl))
382 varpool_node *node;
383 bool needed = true;
384 node = varpool_node::get (decl);
386 if (!node && flag_ltrans)
387 needed = false;
388 else if (node && node->definition)
389 needed = false;
390 else if (node && node->alias)
391 needed = false;
392 else if (!symtab->global_info_ready
393 && (TREE_USED (decl)
394 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
395 /* needed */;
396 else if (node && node->analyzed)
397 /* needed */;
398 else if (DECL_COMDAT (decl))
399 needed = false;
400 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
401 && (optimize || !flag_keep_static_consts
402 || DECL_ARTIFICIAL (decl)))
403 needed = false;
405 if (needed)
407 rest_of_decl_compilation (decl, 1, 1);
408 return true;
412 return false;
415 /* Do any final processing required for the declarations in VEC, of
416 which there are LEN. We write out inline functions and variables
417 that have been deferred until this point, but which are required.
418 Returns nonzero if anything was put out. */
420 bool
421 wrapup_global_declarations (tree *vec, int len)
423 bool reconsider, output_something = false;
424 int i;
426 for (i = 0; i < len; i++)
427 wrapup_global_declaration_1 (vec[i]);
429 /* Now emit any global variables or functions that we have been
430 putting off. We need to loop in case one of the things emitted
431 here references another one which comes earlier in the list. */
434 reconsider = false;
435 for (i = 0; i < len; i++)
436 reconsider |= wrapup_global_declaration_2 (vec[i]);
437 if (reconsider)
438 output_something = true;
440 while (reconsider);
442 return output_something;
445 /* Compile an entire translation unit. Write a file of assembly
446 output and various debugging dumps. */
448 static void
449 compile_file (void)
451 timevar_start (TV_PHASE_PARSING);
452 timevar_push (TV_PARSE_GLOBAL);
454 /* Parse entire file and generate initial debug information. */
455 lang_hooks.parse_file ();
457 timevar_pop (TV_PARSE_GLOBAL);
458 timevar_stop (TV_PHASE_PARSING);
460 if (flag_dump_locations)
461 dump_location_info (stderr);
463 /* Compilation is now finished except for writing
464 what's left of the symbol table output. */
466 if (flag_syntax_only || flag_wpa)
467 return;
469 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
470 and this shouldn't influence any types built by the middle-end
471 from now on (like gcov_info_type). */
472 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;
474 ggc_protect_identifiers = false;
476 /* Run the actual compilation process. */
477 if (!in_lto_p)
479 timevar_start (TV_PHASE_OPT_GEN);
480 symtab->finalize_compilation_unit ();
481 timevar_stop (TV_PHASE_OPT_GEN);
484 /* Perform any post compilation-proper parser cleanups and
485 processing. This is currently only needed for the C++ parser,
486 which can be hopefully cleaned up so this hook is no longer
487 necessary. */
488 if (lang_hooks.decls.post_compilation_parsing_cleanups)
489 lang_hooks.decls.post_compilation_parsing_cleanups ();
491 optimization_records_finish ();
493 if (seen_error ())
494 return;
496 timevar_start (TV_PHASE_LATE_ASM);
498 /* Compilation unit is finalized. When producing non-fat LTO object, we are
499 basically finished. */
500 if ((in_lto_p && flag_incremental_link != INCREMENTAL_LINK_LTO)
501 || !flag_lto || flag_fat_lto_objects)
503 /* File-scope initialization for AddressSanitizer. */
504 if (flag_sanitize & SANITIZE_ADDRESS)
505 asan_finish_file ();
507 if (flag_sanitize & SANITIZE_THREAD)
508 tsan_finish_file ();
510 omp_finish_file ();
512 hsa_output_brig ();
514 output_shared_constant_pool ();
515 output_object_blocks ();
516 finish_tm_clone_pairs ();
518 /* Write out any pending weak symbol declarations. */
519 weak_finish ();
521 /* This must be at the end before unwind and debug info.
522 Some target ports emit PIC setup thunks here. */
523 targetm.asm_out.code_end ();
525 /* Do dbx symbols. */
526 timevar_push (TV_SYMOUT);
528 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
529 dwarf2out_frame_finish ();
530 #endif
532 (*debug_hooks->finish) (main_input_filename);
533 timevar_pop (TV_SYMOUT);
535 /* Output some stuff at end of file if nec. */
537 dw2_output_indirect_constants ();
539 /* Flush any pending external directives. */
540 process_pending_assemble_externals ();
543 /* Emit LTO marker if LTO info has been previously emitted. This is
544 used by collect2 to determine whether an object file contains IL.
545 We used to emit an undefined reference here, but this produces
546 link errors if an object file with IL is stored into a shared
547 library without invoking lto1. */
548 if (flag_generate_lto || flag_generate_offload)
550 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
551 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
552 "__gnu_lto_v1",
553 HOST_WIDE_INT_1U, 8);
554 #elif defined ASM_OUTPUT_ALIGNED_COMMON
555 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
556 HOST_WIDE_INT_1U, 8);
557 #else
558 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
559 HOST_WIDE_INT_1U,
560 HOST_WIDE_INT_1U);
561 #endif
564 /* Let linker plugin know that this is a slim object and must be LTOed
565 even when user did not ask for it. */
566 if (flag_generate_lto && !flag_fat_lto_objects)
568 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
569 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE, "__gnu_lto_slim",
570 HOST_WIDE_INT_1U, 8);
571 #elif defined ASM_OUTPUT_ALIGNED_COMMON
572 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_slim",
573 HOST_WIDE_INT_1U, 8);
574 #else
575 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_slim",
576 HOST_WIDE_INT_1U,
577 HOST_WIDE_INT_1U);
578 #endif
581 /* Attach a special .ident directive to the end of the file to identify
582 the version of GCC which compiled this code. The format of the .ident
583 string is patterned after the ones produced by native SVR4 compilers. */
584 if (!flag_no_ident)
586 const char *pkg_version = "(GNU) ";
587 char *ident_str;
589 if (strcmp ("(GCC) ", pkgversion_string))
590 pkg_version = pkgversion_string;
592 ident_str = ACONCAT (("GCC: ", pkg_version, version_string, NULL));
593 targetm.asm_out.output_ident (ident_str);
596 /* Auto profile finalization. */
597 if (flag_auto_profile)
598 end_auto_profile ();
600 /* Invoke registered plugin callbacks. */
601 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
603 /* This must be at the end. Some target ports emit end of file directives
604 into the assembly file here, and hence we can not output anything to the
605 assembly file after this point. */
606 targetm.asm_out.file_end ();
608 timevar_stop (TV_PHASE_LATE_ASM);
611 /* Print version information to FILE.
612 Each line begins with INDENT (for the case where FILE is the
613 assembler output file).
615 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
616 proper and can print pertinent state (e.g. params and plugins).
618 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
619 compiler, and we don't hold the mutex on the compiler's global state:
620 we can't print params and plugins, since they might not be initialized,
621 or might be being manipulated by a compile running in another
622 thread. */
624 void
625 print_version (FILE *file, const char *indent, bool show_global_state)
627 static const char fmt1[] =
628 #ifdef __GNUC__
629 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
630 #else
631 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
632 #endif
634 static const char fmt2[] =
635 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n");
636 static const char fmt3[] =
637 N_("%s%swarning: %s header version %s differs from library version %s.\n");
638 static const char fmt4[] =
639 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
640 #ifndef __VERSION__
641 #define __VERSION__ "[?]"
642 #endif
643 fprintf (file,
644 file == stderr ? _(fmt1) : fmt1,
645 indent, *indent != 0 ? " " : "",
646 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
647 indent, __VERSION__);
649 /* We need to stringify the GMP macro values. Ugh, gmp_version has
650 two string formats, "i.j.k" and "i.j" when k is zero. As of
651 gmp-4.3.0, GMP always uses the 3 number format. */
652 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
653 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
654 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
655 #define GCC_GMP_VERSION \
656 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
657 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
658 #define GCC_GMP_STRINGIFY_VERSION \
659 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
660 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
661 #else
662 #define GCC_GMP_STRINGIFY_VERSION \
663 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
664 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
665 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
666 #endif
667 fprintf (file,
668 file == stderr ? _(fmt2) : fmt2,
669 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING,
670 #ifndef HAVE_isl
671 "none"
672 #else
673 isl_version ()
674 #endif
676 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
677 fprintf (file,
678 file == stderr ? _(fmt3) : fmt3,
679 indent, *indent != 0 ? " " : "",
680 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
681 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
682 fprintf (file,
683 file == stderr ? _(fmt3) : fmt3,
684 indent, *indent != 0 ? " " : "",
685 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
686 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
687 fprintf (file,
688 file == stderr ? _(fmt3) : fmt3,
689 indent, *indent != 0 ? " " : "",
690 "MPC", MPC_VERSION_STRING, mpc_get_version ());
692 if (show_global_state)
694 fprintf (file,
695 file == stderr ? _(fmt4) : fmt4,
696 indent, *indent != 0 ? " " : "",
697 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
699 print_plugins_versions (file, indent);
703 static int
704 print_to_asm_out_file (print_switch_type type, const char * text)
706 bool prepend_sep = true;
708 switch (type)
710 case SWITCH_TYPE_LINE_END:
711 putc ('\n', asm_out_file);
712 return 1;
714 case SWITCH_TYPE_LINE_START:
715 fputs (ASM_COMMENT_START, asm_out_file);
716 return strlen (ASM_COMMENT_START);
718 case SWITCH_TYPE_DESCRIPTIVE:
719 if (ASM_COMMENT_START[0] == 0)
720 prepend_sep = false;
721 /* FALLTHRU */
722 case SWITCH_TYPE_PASSED:
723 case SWITCH_TYPE_ENABLED:
724 if (prepend_sep)
725 fputc (' ', asm_out_file);
726 fputs (text, asm_out_file);
727 /* No need to return the length here as
728 print_single_switch has already done it. */
729 return 0;
731 default:
732 return -1;
736 static int
737 print_to_stderr (print_switch_type type, const char * text)
739 switch (type)
741 case SWITCH_TYPE_LINE_END:
742 putc ('\n', stderr);
743 return 1;
745 case SWITCH_TYPE_LINE_START:
746 return 0;
748 case SWITCH_TYPE_PASSED:
749 case SWITCH_TYPE_ENABLED:
750 fputc (' ', stderr);
751 /* FALLTHRU */
753 case SWITCH_TYPE_DESCRIPTIVE:
754 fputs (text, stderr);
755 /* No need to return the length here as
756 print_single_switch has already done it. */
757 return 0;
759 default:
760 return -1;
764 /* Print an option value and return the adjusted position in the line.
765 ??? print_fn doesn't handle errors, eg disk full; presumably other
766 code will catch a disk full though. */
768 static int
769 print_single_switch (print_switch_fn_type print_fn,
770 int pos,
771 print_switch_type type,
772 const char * text)
774 /* The ultrix fprintf returns 0 on success, so compute the result
775 we want here since we need it for the following test. The +1
776 is for the separator character that will probably be emitted. */
777 int len = strlen (text) + 1;
779 if (pos != 0
780 && pos + len > MAX_LINE)
782 print_fn (SWITCH_TYPE_LINE_END, NULL);
783 pos = 0;
786 if (pos == 0)
787 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
789 print_fn (type, text);
790 return pos + len;
793 /* Print active target switches using PRINT_FN.
794 POS is the current cursor position and MAX is the size of a "line".
795 Each line begins with INDENT and ends with TERM.
796 Each switch is separated from the next by SEP. */
798 static void
799 print_switch_values (print_switch_fn_type print_fn)
801 int pos = 0;
802 size_t j;
804 /* Print the options as passed. */
805 pos = print_single_switch (print_fn, pos,
806 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
808 for (j = 1; j < save_decoded_options_count; j++)
810 switch (save_decoded_options[j].opt_index)
812 case OPT_o:
813 case OPT_d:
814 case OPT_dumpbase:
815 case OPT_dumpdir:
816 case OPT_auxbase:
817 case OPT_quiet:
818 case OPT_version:
819 /* Ignore these. */
820 continue;
823 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED,
824 save_decoded_options[j].orig_option_with_args_text);
827 if (pos > 0)
828 print_fn (SWITCH_TYPE_LINE_END, NULL);
830 /* Print the -f and -m options that have been enabled.
831 We don't handle language specific options but printing argv
832 should suffice. */
833 pos = print_single_switch (print_fn, 0,
834 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
836 for (j = 0; j < cl_options_count; j++)
837 if (cl_options[j].cl_report
838 && option_enabled (j, &global_options) > 0)
839 pos = print_single_switch (print_fn, pos,
840 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
842 print_fn (SWITCH_TYPE_LINE_END, NULL);
845 /* Open assembly code output file. Do this even if -fsyntax-only is
846 on, because then the driver will have provided the name of a
847 temporary file or bit bucket for us. NAME is the file specified on
848 the command line, possibly NULL. */
849 static void
850 init_asm_output (const char *name)
852 if (name == NULL && asm_file_name == 0)
853 asm_out_file = stdout;
854 else
856 if (asm_file_name == 0)
858 int len = strlen (dump_base_name);
859 char *dumpname = XNEWVEC (char, len + 6);
861 memcpy (dumpname, dump_base_name, len + 1);
862 strip_off_ending (dumpname, len);
863 strcat (dumpname, ".s");
864 asm_file_name = dumpname;
866 if (!strcmp (asm_file_name, "-"))
867 asm_out_file = stdout;
868 else if (!canonical_filename_eq (asm_file_name, name)
869 || !strcmp (asm_file_name, HOST_BIT_BUCKET))
870 asm_out_file = fopen (asm_file_name, "w");
871 else
872 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
873 line in the current file. */
874 fatal_error (UNKNOWN_LOCATION,
875 "input file %qs is the same as output file",
876 asm_file_name);
877 if (asm_out_file == 0)
878 fatal_error (UNKNOWN_LOCATION,
879 "can%'t open %qs for writing: %m", asm_file_name);
882 if (!flag_syntax_only)
884 targetm.asm_out.file_start ();
886 if (flag_record_gcc_switches)
888 if (targetm.asm_out.record_gcc_switches)
890 /* Let the target know that we are about to start recording. */
891 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
892 NULL);
893 /* Now record the switches. */
894 print_switch_values (targetm.asm_out.record_gcc_switches);
895 /* Let the target know that the recording is over. */
896 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
897 NULL);
899 else
900 inform (UNKNOWN_LOCATION,
901 "-frecord-gcc-switches is not supported by "
902 "the current target");
905 if (flag_verbose_asm)
907 /* Print the list of switches in effect
908 into the assembler file as comments. */
909 print_version (asm_out_file, ASM_COMMENT_START, true);
910 print_switch_values (print_to_asm_out_file);
911 putc ('\n', asm_out_file);
916 /* A helper function; used as the reallocator function for cpp's line
917 table. */
918 static void *
919 realloc_for_line_map (void *ptr, size_t len)
921 return ggc_realloc (ptr, len);
924 /* A helper function: used as the allocator function for
925 identifier_to_locale. */
926 static void *
927 alloc_for_identifier_to_locale (size_t len)
929 return ggc_alloc_atomic (len);
932 /* Output stack usage information. */
933 void
934 output_stack_usage (void)
936 static bool warning_issued = false;
937 enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED };
938 const char *stack_usage_kind_str[] = {
939 "static",
940 "dynamic",
941 "dynamic,bounded"
943 HOST_WIDE_INT stack_usage = current_function_static_stack_size;
944 enum stack_usage_kind_type stack_usage_kind;
946 if (stack_usage < 0)
948 if (!warning_issued)
950 warning (0, "stack usage computation not supported for this target");
951 warning_issued = true;
953 return;
956 stack_usage_kind = STATIC;
958 /* Add the maximum amount of space pushed onto the stack. */
959 if (maybe_ne (current_function_pushed_stack_size, 0))
961 HOST_WIDE_INT extra;
962 if (current_function_pushed_stack_size.is_constant (&extra))
964 stack_usage += extra;
965 stack_usage_kind = DYNAMIC_BOUNDED;
967 else
969 extra = constant_lower_bound (current_function_pushed_stack_size);
970 stack_usage += extra;
971 stack_usage_kind = DYNAMIC;
975 /* Now on to the tricky part: dynamic stack allocation. */
976 if (current_function_allocates_dynamic_stack_space)
978 if (stack_usage_kind != DYNAMIC)
980 if (current_function_has_unbounded_dynamic_stack_size)
981 stack_usage_kind = DYNAMIC;
982 else
983 stack_usage_kind = DYNAMIC_BOUNDED;
986 /* Add the size even in the unbounded case, this can't hurt. */
987 stack_usage += current_function_dynamic_stack_size;
990 if (flag_stack_usage)
992 expanded_location loc
993 = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
994 /* We don't want to print the full qualified name because it can be long,
995 so we strip the scope prefix, but we may need to deal with the suffix
996 created by the compiler. */
997 const char *suffix
998 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), '.');
999 const char *name
1000 = lang_hooks.decl_printable_name (current_function_decl, 2);
1001 if (suffix)
1003 const char *dot = strchr (name, '.');
1004 while (dot && strcasecmp (dot, suffix) != 0)
1006 name = dot + 1;
1007 dot = strchr (name, '.');
1010 else
1012 const char *dot = strrchr (name, '.');
1013 if (dot)
1014 name = dot + 1;
1017 fprintf (stack_usage_file,
1018 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC"\t%s\n",
1019 lbasename (loc.file),
1020 loc.line,
1021 loc.column,
1022 name,
1023 stack_usage,
1024 stack_usage_kind_str[stack_usage_kind]);
1027 if (warn_stack_usage >= 0 && warn_stack_usage < HOST_WIDE_INT_MAX)
1029 const location_t loc = DECL_SOURCE_LOCATION (current_function_decl);
1031 if (stack_usage_kind == DYNAMIC)
1032 warning_at (loc, OPT_Wstack_usage_, "stack usage might be unbounded");
1033 else if (stack_usage > warn_stack_usage)
1035 if (stack_usage_kind == DYNAMIC_BOUNDED)
1036 warning_at (loc,
1037 OPT_Wstack_usage_, "stack usage might be %wu bytes",
1038 stack_usage);
1039 else
1040 warning_at (loc, OPT_Wstack_usage_, "stack usage is %wu bytes",
1041 stack_usage);
1046 /* Open an auxiliary output file. */
1047 static FILE *
1048 open_auxiliary_file (const char *ext)
1050 char *filename;
1051 FILE *file;
1053 filename = concat (aux_base_name, ".", ext, NULL);
1054 file = fopen (filename, "w");
1055 if (!file)
1056 fatal_error (input_location, "can%'t open %s for writing: %m", filename);
1057 free (filename);
1058 return file;
1061 /* Alternative diagnostics callback for reentered ICE reporting. */
1063 static void
1064 internal_error_reentered (diagnostic_context *, const char *, va_list *)
1066 /* Flush the dump file if emergency_dump_function itself caused an ICE. */
1067 if (dump_file)
1068 fflush (dump_file);
1071 /* Auxiliary callback for the diagnostics code. */
1073 static void
1074 internal_error_function (diagnostic_context *, const char *, va_list *)
1076 global_dc->internal_error = internal_error_reentered;
1077 warn_if_plugins ();
1078 emergency_dump_function ();
1081 /* Initialization of the front end environment, before command line
1082 options are parsed. Signal handlers, internationalization etc.
1083 ARGV0 is main's argv[0]. */
1084 static void
1085 general_init (const char *argv0, bool init_signals)
1087 const char *p;
1089 p = argv0 + strlen (argv0);
1090 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1091 --p;
1092 progname = p;
1094 xmalloc_set_program_name (progname);
1096 hex_init ();
1098 /* Unlock the stdio streams. */
1099 unlock_std_streams ();
1101 gcc_init_libintl ();
1103 identifier_to_locale_alloc = alloc_for_identifier_to_locale;
1104 identifier_to_locale_free = ggc_free;
1106 /* Initialize the diagnostics reporting machinery, so option parsing
1107 can give warnings and errors. */
1108 diagnostic_initialize (global_dc, N_OPTS);
1109 /* Set a default printer. Language specific initializations will
1110 override it later. */
1111 tree_diagnostics_defaults (global_dc);
1113 global_dc->show_caret
1114 = global_options_init.x_flag_diagnostics_show_caret;
1115 global_dc->show_option_requested
1116 = global_options_init.x_flag_diagnostics_show_option;
1117 global_dc->show_column
1118 = global_options_init.x_flag_show_column;
1119 global_dc->internal_error = internal_error_function;
1120 global_dc->option_enabled = option_enabled;
1121 global_dc->option_state = &global_options;
1122 global_dc->option_name = option_name;
1124 if (init_signals)
1126 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1127 #ifdef SIGSEGV
1128 signal (SIGSEGV, crash_signal);
1129 #endif
1130 #ifdef SIGILL
1131 signal (SIGILL, crash_signal);
1132 #endif
1133 #ifdef SIGBUS
1134 signal (SIGBUS, crash_signal);
1135 #endif
1136 #ifdef SIGABRT
1137 signal (SIGABRT, crash_signal);
1138 #endif
1139 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1140 signal (SIGIOT, crash_signal);
1141 #endif
1142 #ifdef SIGFPE
1143 signal (SIGFPE, crash_signal);
1144 #endif
1146 /* Other host-specific signal setup. */
1147 (*host_hooks.extra_signals)();
1150 /* Initialize the garbage-collector, string pools and tree type hash
1151 table. */
1152 init_ggc ();
1153 init_stringpool ();
1154 input_location = UNKNOWN_LOCATION;
1155 line_table = ggc_alloc<line_maps> ();
1156 linemap_init (line_table, BUILTINS_LOCATION);
1157 line_table->reallocator = realloc_for_line_map;
1158 line_table->round_alloc_size = ggc_round_alloc_size;
1159 line_table->default_range_bits = 5;
1160 init_ttree ();
1162 /* Initialize register usage now so switches may override. */
1163 init_reg_sets ();
1165 /* Register the language-independent parameters. */
1166 global_init_params ();
1168 /* This must be done after global_init_params but before argument
1169 processing. */
1170 init_ggc_heuristics ();
1172 /* Create the singleton holder for global state. This creates the
1173 dump manager. */
1174 g = new gcc::context ();
1176 /* Allow languages and middle-end to register their dumps before the
1177 optimization passes. */
1178 g->get_dumps ()->register_dumps ();
1180 /* Create the passes. */
1181 g->set_passes (new gcc::pass_manager (g));
1183 symtab = new (ggc_cleared_alloc <symbol_table> ()) symbol_table ();
1185 statistics_early_init ();
1186 finish_params ();
1189 /* Return true if the current target supports -fsection-anchors. */
1191 static bool
1192 target_supports_section_anchors_p (void)
1194 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1195 return false;
1197 if (targetm.asm_out.output_anchor == NULL)
1198 return false;
1200 return true;
1203 /* Parse "N[:M][:...]" into struct align_flags A.
1204 VALUES contains parsed values (in reverse order), all processed
1205 values are popped. */
1207 static void
1208 read_log_maxskip (auto_vec<unsigned> &values, align_flags_tuple *a)
1210 unsigned n = values.pop ();
1211 if (n != 0)
1212 a->log = floor_log2 (n * 2 - 1);
1214 if (values.is_empty ())
1215 a->maxskip = n ? n - 1 : 0;
1216 else
1218 unsigned m = values.pop ();
1219 /* -falign-foo=N:M means M-1 max bytes of padding, not M. */
1220 if (m > 0)
1221 m--;
1222 a->maxskip = m;
1225 /* Normalize the tuple. */
1226 a->normalize ();
1229 /* Parse "N[:M[:N2[:M2]]]" string FLAG into a pair of struct align_flags. */
1231 static void
1232 parse_N_M (const char *flag, align_flags &a)
1234 if (flag)
1236 static hash_map <nofree_string_hash, align_flags> cache;
1237 align_flags *entry = cache.get (flag);
1238 if (entry)
1240 a = *entry;
1241 return;
1244 auto_vec<unsigned> result_values;
1245 bool r = parse_and_check_align_values (flag, NULL, result_values, false,
1246 UNKNOWN_LOCATION);
1247 if (!r)
1248 return;
1250 /* Reverse values for easier manipulation. */
1251 result_values.reverse ();
1253 read_log_maxskip (result_values, &a.levels[0]);
1254 if (!result_values.is_empty ())
1255 read_log_maxskip (result_values, &a.levels[1]);
1256 #ifdef SUBALIGN_LOG
1257 else
1259 /* N2[:M2] is not specified. This arch has a default for N2.
1260 Before -falign-foo=N:M:N2:M2 was introduced, x86 had a tweak.
1261 -falign-functions=N with N > 8 was adding secondary alignment.
1262 -falign-functions=10 was emitting this before every function:
1263 .p2align 4,,9
1264 .p2align 3
1265 Now this behavior (and more) can be explicitly requested:
1266 -falign-functions=16:10:8
1267 Retain old behavior if N2 is missing: */
1269 int align = 1 << a.levels[0].log;
1270 int subalign = 1 << SUBALIGN_LOG;
1272 if (a.levels[0].log > SUBALIGN_LOG
1273 && a.levels[0].maxskip >= subalign - 1)
1275 /* Set N2 unless subalign can never have any effect. */
1276 if (align > a.levels[0].maxskip + 1)
1278 a.levels[1].log = SUBALIGN_LOG;
1279 a.levels[1].normalize ();
1283 #endif
1285 /* Cache seen value. */
1286 cache.put (flag, a);
1290 /* Process -falign-foo=N[:M[:N2[:M2]]] options. */
1292 void
1293 parse_alignment_opts (void)
1295 parse_N_M (str_align_loops, align_loops);
1296 parse_N_M (str_align_jumps, align_jumps);
1297 parse_N_M (str_align_labels, align_labels);
1298 parse_N_M (str_align_functions, align_functions);
1301 /* Process the options that have been parsed. */
1302 static void
1303 process_options (void)
1305 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1306 This can happen with incorrect pre-processed input. */
1307 debug_hooks = &do_nothing_debug_hooks;
1309 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;
1311 /* Allow the front end to perform consistency checks and do further
1312 initialization based on the command line options. This hook also
1313 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1314 so we can correctly initialize debug output. */
1315 no_backend = lang_hooks.post_options (&main_input_filename);
1317 /* Some machines may reject certain combinations of options. */
1318 location_t saved_location = input_location;
1319 input_location = UNKNOWN_LOCATION;
1320 targetm.target_option.override ();
1321 input_location = saved_location;
1323 if (flag_diagnostics_generate_patch)
1324 global_dc->edit_context_ptr = new edit_context ();
1326 /* Avoid any informative notes in the second run of -fcompare-debug. */
1327 if (flag_compare_debug)
1328 diagnostic_inhibit_notes (global_dc);
1330 if (flag_section_anchors && !target_supports_section_anchors_p ())
1332 warning_at (UNKNOWN_LOCATION, OPT_fsection_anchors,
1333 "this target does not support %qs",
1334 "-fsection-anchors");
1335 flag_section_anchors = 0;
1338 if (flag_short_enums == 2)
1339 flag_short_enums = targetm.default_short_enums ();
1341 /* Set aux_base_name if not already set. */
1342 if (aux_base_name)
1344 else if (main_input_filename)
1346 char *name = xstrdup (lbasename (main_input_filename));
1348 strip_off_ending (name, strlen (name));
1349 aux_base_name = name;
1351 else
1352 aux_base_name = "gccaux";
1354 #ifndef HAVE_isl
1355 if (flag_graphite
1356 || flag_loop_nest_optimize
1357 || flag_graphite_identity
1358 || flag_loop_parallelize_all)
1359 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1360 "(-fgraphite, -fgraphite-identity, -floop-nest-optimize, "
1361 "-floop-parallelize-all)");
1362 #endif
1364 if (flag_cf_protection != CF_NONE
1365 && !(flag_cf_protection & CF_SET))
1367 if (flag_cf_protection == CF_FULL)
1369 error_at (UNKNOWN_LOCATION,
1370 "%<-fcf-protection=full%> is not supported for this "
1371 "target");
1372 flag_cf_protection = CF_NONE;
1374 if (flag_cf_protection == CF_BRANCH)
1376 error_at (UNKNOWN_LOCATION,
1377 "%<-fcf-protection=branch%> is not supported for this "
1378 "target");
1379 flag_cf_protection = CF_NONE;
1381 if (flag_cf_protection == CF_RETURN)
1383 error_at (UNKNOWN_LOCATION,
1384 "%<-fcf-protection=return%> is not supported for this "
1385 "target");
1386 flag_cf_protection = CF_NONE;
1390 /* One region RA really helps to decrease the code size. */
1391 if (flag_ira_region == IRA_REGION_AUTODETECT)
1392 flag_ira_region
1393 = optimize_size || !optimize ? IRA_REGION_ONE : IRA_REGION_MIXED;
1395 if (!abi_version_at_least (2))
1397 /* -fabi-version=1 support was removed after GCC 4.9. */
1398 error_at (UNKNOWN_LOCATION,
1399 "%<-fabi-version=1%> is no longer supported");
1400 flag_abi_version = 2;
1403 /* Unrolling all loops implies that standard loop unrolling must also
1404 be done. */
1405 if (flag_unroll_all_loops)
1406 flag_unroll_loops = 1;
1408 /* web and rename-registers help when run after loop unrolling. */
1409 if (flag_web == AUTODETECT_VALUE)
1410 flag_web = flag_unroll_loops;
1412 if (flag_rename_registers == AUTODETECT_VALUE)
1413 flag_rename_registers = flag_unroll_loops;
1415 if (flag_non_call_exceptions)
1416 flag_asynchronous_unwind_tables = 1;
1417 if (flag_asynchronous_unwind_tables)
1418 flag_unwind_tables = 1;
1420 if (flag_value_profile_transformations)
1421 flag_profile_values = 1;
1423 /* Warn about options that are not supported on this machine. */
1424 #ifndef INSN_SCHEDULING
1425 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1426 warning_at (UNKNOWN_LOCATION, 0,
1427 "instruction scheduling not supported on this target machine");
1428 #endif
1429 if (!DELAY_SLOTS && flag_delayed_branch)
1430 warning_at (UNKNOWN_LOCATION, 0,
1431 "this target machine does not have delayed branches");
1433 user_label_prefix = USER_LABEL_PREFIX;
1434 if (flag_leading_underscore != -1)
1436 /* If the default prefix is more complicated than "" or "_",
1437 issue a warning and ignore this option. */
1438 if (user_label_prefix[0] == 0 ||
1439 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1441 user_label_prefix = flag_leading_underscore ? "_" : "";
1443 else
1444 warning_at (UNKNOWN_LOCATION, 0,
1445 "-f%sleading-underscore not supported on this "
1446 "target machine", flag_leading_underscore ? "" : "no-");
1449 /* If we are in verbose mode, write out the version and maybe all the
1450 option flags in use. */
1451 if (version_flag)
1453 print_version (stderr, "", true);
1454 if (! quiet_flag)
1455 print_switch_values (print_to_stderr);
1458 if (flag_syntax_only)
1460 write_symbols = NO_DEBUG;
1461 profile_flag = 0;
1464 if (flag_gtoggle)
1466 if (debug_info_level == DINFO_LEVEL_NONE)
1468 debug_info_level = DINFO_LEVEL_NORMAL;
1470 if (write_symbols == NO_DEBUG)
1471 write_symbols = PREFERRED_DEBUGGING_TYPE;
1473 else
1474 debug_info_level = DINFO_LEVEL_NONE;
1477 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1479 FILE *final_output = fopen (flag_dump_final_insns, "w");
1480 if (!final_output)
1482 error_at (UNKNOWN_LOCATION,
1483 "could not open final insn dump file %qs: %m",
1484 flag_dump_final_insns);
1485 flag_dump_final_insns = NULL;
1487 else if (fclose (final_output))
1489 error_at (UNKNOWN_LOCATION,
1490 "could not close zeroed insn dump file %qs: %m",
1491 flag_dump_final_insns);
1492 flag_dump_final_insns = NULL;
1496 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1497 level is 0. */
1498 if (debug_info_level == DINFO_LEVEL_NONE)
1499 write_symbols = NO_DEBUG;
1501 if (write_symbols == NO_DEBUG)
1503 #if defined(DBX_DEBUGGING_INFO)
1504 else if (write_symbols == DBX_DEBUG)
1505 debug_hooks = &dbx_debug_hooks;
1506 #endif
1507 #if defined(XCOFF_DEBUGGING_INFO)
1508 else if (write_symbols == XCOFF_DEBUG)
1509 debug_hooks = &xcoff_debug_hooks;
1510 #endif
1511 #ifdef DWARF2_DEBUGGING_INFO
1512 else if (write_symbols == DWARF2_DEBUG)
1513 debug_hooks = &dwarf2_debug_hooks;
1514 #endif
1515 #ifdef VMS_DEBUGGING_INFO
1516 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1517 debug_hooks = &vmsdbg_debug_hooks;
1518 #endif
1519 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1520 else if (write_symbols == DWARF2_DEBUG)
1521 debug_hooks = &dwarf2_lineno_debug_hooks;
1522 #endif
1523 else
1524 error_at (UNKNOWN_LOCATION,
1525 "target system does not support the %qs debug format",
1526 debug_type_names[write_symbols]);
1528 /* We know which debug output will be used so we can set flag_var_tracking
1529 and flag_var_tracking_uninit if the user has not specified them. */
1530 if (debug_info_level < DINFO_LEVEL_NORMAL
1531 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1533 if (flag_var_tracking == 1
1534 || flag_var_tracking_uninit == 1)
1536 if (debug_info_level < DINFO_LEVEL_NORMAL)
1537 warning_at (UNKNOWN_LOCATION, 0,
1538 "variable tracking requested, but useless unless "
1539 "producing debug info");
1540 else
1541 warning_at (UNKNOWN_LOCATION, 0,
1542 "variable tracking requested, but not supported "
1543 "by this debug format");
1545 flag_var_tracking = 0;
1546 flag_var_tracking_uninit = 0;
1549 /* The debug hooks are used to implement -fdump-go-spec because it
1550 gives a simple and stable API for all the information we need to
1551 dump. */
1552 if (flag_dump_go_spec != NULL)
1553 debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks);
1555 /* If the user specifically requested variable tracking with tagging
1556 uninitialized variables, we need to turn on variable tracking.
1557 (We already determined above that variable tracking is feasible.) */
1558 if (flag_var_tracking_uninit == 1)
1559 flag_var_tracking = 1;
1561 if (flag_var_tracking == AUTODETECT_VALUE)
1562 flag_var_tracking = optimize >= 1;
1564 if (flag_var_tracking_uninit == AUTODETECT_VALUE)
1565 flag_var_tracking_uninit = flag_var_tracking;
1567 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
1568 flag_var_tracking_assignments
1569 = (flag_var_tracking
1570 && !(flag_selective_scheduling || flag_selective_scheduling2));
1572 if (flag_var_tracking_assignments_toggle)
1573 flag_var_tracking_assignments = !flag_var_tracking_assignments;
1575 if (flag_var_tracking_assignments && !flag_var_tracking)
1576 flag_var_tracking = flag_var_tracking_assignments = -1;
1578 if (flag_var_tracking_assignments
1579 && (flag_selective_scheduling || flag_selective_scheduling2))
1580 warning_at (UNKNOWN_LOCATION, 0,
1581 "var-tracking-assignments changes selective scheduling");
1583 if (debug_nonbind_markers_p == AUTODETECT_VALUE)
1584 debug_nonbind_markers_p
1585 = (optimize
1586 && debug_info_level >= DINFO_LEVEL_NORMAL
1587 && (write_symbols == DWARF2_DEBUG
1588 || write_symbols == VMS_AND_DWARF2_DEBUG)
1589 && !(flag_selective_scheduling || flag_selective_scheduling2));
1591 if (dwarf2out_as_loc_support == AUTODETECT_VALUE)
1592 dwarf2out_as_loc_support
1593 = dwarf2out_default_as_loc_support ();
1594 if (dwarf2out_as_locview_support == AUTODETECT_VALUE)
1595 dwarf2out_as_locview_support
1596 = dwarf2out_default_as_locview_support ();
1598 if (debug_variable_location_views == AUTODETECT_VALUE)
1600 debug_variable_location_views
1601 = (flag_var_tracking
1602 && debug_info_level >= DINFO_LEVEL_NORMAL
1603 && (write_symbols == DWARF2_DEBUG
1604 || write_symbols == VMS_AND_DWARF2_DEBUG)
1605 && !dwarf_strict
1606 && dwarf2out_as_loc_support
1607 && dwarf2out_as_locview_support);
1609 else if (debug_variable_location_views == -1 && dwarf_version != 5)
1611 warning_at (UNKNOWN_LOCATION, 0,
1612 "without -gdwarf-5, -gvariable-location-views=incompat5 "
1613 "is equivalent to -gvariable-location-views");
1614 debug_variable_location_views = 1;
1617 if (debug_internal_reset_location_views == 2)
1619 debug_internal_reset_location_views
1620 = (debug_variable_location_views
1621 && targetm.reset_location_view);
1623 else if (debug_internal_reset_location_views
1624 && !debug_variable_location_views)
1626 warning_at (UNKNOWN_LOCATION, 0,
1627 "-ginternal-reset-location-views is forced disabled "
1628 "without -gvariable-location-views");
1629 debug_internal_reset_location_views = 0;
1632 if (debug_inline_points == AUTODETECT_VALUE)
1633 debug_inline_points = debug_variable_location_views;
1634 else if (debug_inline_points && !debug_nonbind_markers_p)
1636 warning_at (UNKNOWN_LOCATION, 0,
1637 "-ginline-points is forced disabled without "
1638 "-gstatement-frontiers");
1639 debug_inline_points = 0;
1642 if (flag_tree_cselim == AUTODETECT_VALUE)
1644 if (HAVE_conditional_move)
1645 flag_tree_cselim = 1;
1646 else
1647 flag_tree_cselim = 0;
1650 /* If auxiliary info generation is desired, open the output file.
1651 This goes in the same directory as the source file--unlike
1652 all the other output files. */
1653 if (flag_gen_aux_info)
1655 aux_info_file = fopen (aux_info_file_name, "w");
1656 if (aux_info_file == 0)
1657 fatal_error (UNKNOWN_LOCATION,
1658 "can%'t open %s: %m", aux_info_file_name);
1661 if (!targetm_common.have_named_sections)
1663 if (flag_function_sections)
1665 warning_at (UNKNOWN_LOCATION, 0,
1666 "-ffunction-sections not supported for this target");
1667 flag_function_sections = 0;
1669 if (flag_data_sections)
1671 warning_at (UNKNOWN_LOCATION, 0,
1672 "-fdata-sections not supported for this target");
1673 flag_data_sections = 0;
1677 if (flag_prefetch_loop_arrays > 0 && !targetm.code_for_prefetch)
1679 warning_at (UNKNOWN_LOCATION, 0,
1680 "-fprefetch-loop-arrays not supported for this target");
1681 flag_prefetch_loop_arrays = 0;
1683 else if (flag_prefetch_loop_arrays > 0 && !targetm.have_prefetch ())
1685 warning_at (UNKNOWN_LOCATION, 0,
1686 "-fprefetch-loop-arrays not supported for this target "
1687 "(try -march switches)");
1688 flag_prefetch_loop_arrays = 0;
1691 /* This combination of options isn't handled for i386 targets and doesn't
1692 make much sense anyway, so don't allow it. */
1693 if (flag_prefetch_loop_arrays > 0 && optimize_size)
1695 warning_at (UNKNOWN_LOCATION, 0,
1696 "-fprefetch-loop-arrays is not supported with -Os");
1697 flag_prefetch_loop_arrays = 0;
1700 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1701 if (flag_signaling_nans)
1702 flag_trapping_math = 1;
1704 /* We cannot reassociate if we want traps or signed zeros. */
1705 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1707 warning_at (UNKNOWN_LOCATION, 0,
1708 "-fassociative-math disabled; other options take "
1709 "precedence");
1710 flag_associative_math = 0;
1713 /* -fstack-clash-protection is not currently supported on targets
1714 where the stack grows up. */
1715 if (flag_stack_clash_protection && !STACK_GROWS_DOWNWARD)
1717 warning_at (UNKNOWN_LOCATION, 0,
1718 "%<-fstack-clash-protection%> is not supported on targets "
1719 "where the stack grows from lower to higher addresses");
1720 flag_stack_clash_protection = 0;
1723 /* We can not support -fstack-check= and -fstack-clash-protection at
1724 the same time. */
1725 if (flag_stack_check != NO_STACK_CHECK && flag_stack_clash_protection)
1727 warning_at (UNKNOWN_LOCATION, 0,
1728 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1729 "mutually exclusive. Disabling %<-fstack-check=%>");
1730 flag_stack_check = NO_STACK_CHECK;
1733 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1734 if (flag_cx_limited_range)
1735 flag_complex_method = 0;
1737 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1738 if (flag_cx_fortran_rules)
1739 flag_complex_method = 1;
1741 /* Targets must be able to place spill slots at lower addresses. If the
1742 target already uses a soft frame pointer, the transition is trivial. */
1743 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1745 warning_at (UNKNOWN_LOCATION, 0,
1746 "-fstack-protector not supported for this target");
1747 flag_stack_protect = 0;
1749 if (!flag_stack_protect)
1750 warn_stack_protect = 0;
1752 /* Address Sanitizer needs porting to each target architecture. */
1754 if ((flag_sanitize & SANITIZE_ADDRESS)
1755 && !FRAME_GROWS_DOWNWARD)
1757 warning_at (UNKNOWN_LOCATION, 0,
1758 "-fsanitize=address and -fsanitize=kernel-address "
1759 "are not supported for this target");
1760 flag_sanitize &= ~SANITIZE_ADDRESS;
1763 if ((flag_sanitize & SANITIZE_USER_ADDRESS)
1764 && targetm.asan_shadow_offset == NULL)
1766 warning_at (UNKNOWN_LOCATION, 0,
1767 "-fsanitize=address not supported for this target");
1768 flag_sanitize &= ~SANITIZE_ADDRESS;
1771 /* Do not use IPA optimizations for register allocation if profiler is active
1772 or patchable function entries are inserted for run-time instrumentation
1773 or port does not emit prologue and epilogue as RTL. */
1774 if (profile_flag || function_entry_patch_area_size
1775 || !targetm.have_prologue () || !targetm.have_epilogue ())
1776 flag_ipa_ra = 0;
1778 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1779 have not been set. */
1780 if (!global_options_set.x_warnings_are_errors
1781 && warn_coverage_mismatch
1782 && (global_dc->classify_diagnostic[OPT_Wcoverage_mismatch] ==
1783 DK_UNSPECIFIED))
1784 diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_mismatch,
1785 DK_ERROR, UNKNOWN_LOCATION);
1787 /* Save the current optimization options. */
1788 optimization_default_node = build_optimization_node (&global_options);
1789 optimization_current_node = optimization_default_node;
1791 /* Please don't change global_options after this point, those changes won't
1792 be reflected in optimization_{default,current}_node. */
1795 /* This function can be called multiple times to reinitialize the compiler
1796 back end when register classes or instruction sets have changed,
1797 before each function. */
1798 static void
1799 backend_init_target (void)
1801 /* This depends on stack_pointer_rtx. */
1802 init_fake_stack_mems ();
1804 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1805 mode-dependent. */
1806 init_alias_target ();
1808 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1809 if (!ira_use_lra_p)
1810 init_reload ();
1812 /* Depends on the enabled attribute. */
1813 recog_init ();
1815 /* The following initialization functions need to generate rtl, so
1816 provide a dummy function context for them. */
1817 init_dummy_function_start ();
1819 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1820 on a mode change. */
1821 init_expmed ();
1822 init_lower_subreg ();
1823 init_set_costs ();
1825 init_expr_target ();
1826 ira_init ();
1828 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1829 after a mode change as well. */
1830 caller_save_initialized_p = false;
1832 expand_dummy_function_end ();
1835 /* Initialize the compiler back end. This function is called only once,
1836 when starting the compiler. */
1837 static void
1838 backend_init (void)
1840 init_emit_once ();
1842 init_rtlanal ();
1843 init_inline_once ();
1844 init_varasm_once ();
1845 save_register_info ();
1847 /* Middle end needs this initialization for default mem attributes
1848 used by early calls to make_decl_rtl. */
1849 init_emit_regs ();
1851 /* Middle end needs this initialization for mode tables used to assign
1852 modes to vector variables. */
1853 init_regs ();
1856 /* Initialize excess precision settings.
1858 We have no need to modify anything here, just keep track of what the
1859 user requested. We'll figure out any appropriate relaxations
1860 later. */
1862 static void
1863 init_excess_precision (void)
1865 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
1866 flag_excess_precision = flag_excess_precision_cmdline;
1869 /* Initialize things that are both lang-dependent and target-dependent.
1870 This function can be called more than once if target parameters change. */
1871 static void
1872 lang_dependent_init_target (void)
1874 /* This determines excess precision settings. */
1875 init_excess_precision ();
1877 /* This creates various _DECL nodes, so needs to be called after the
1878 front end is initialized. It also depends on the HAVE_xxx macros
1879 generated from the target machine description. */
1880 init_optabs ();
1882 gcc_assert (!this_target_rtl->target_specific_initialized);
1885 /* Perform initializations that are lang-dependent or target-dependent.
1886 but matters only for late optimizations and RTL generation. */
1888 static int rtl_initialized;
1890 void
1891 initialize_rtl (void)
1893 auto_timevar tv (g_timer, TV_INITIALIZE_RTL);
1895 /* Initialization done just once per compilation, but delayed
1896 till code generation. */
1897 if (!rtl_initialized)
1898 ira_init_once ();
1899 rtl_initialized = true;
1901 /* Target specific RTL backend initialization. */
1902 if (!this_target_rtl->target_specific_initialized)
1904 backend_init_target ();
1905 this_target_rtl->target_specific_initialized = true;
1909 /* Language-dependent initialization. Returns nonzero on success. */
1910 static int
1911 lang_dependent_init (const char *name)
1913 location_t save_loc = input_location;
1914 if (dump_base_name == 0)
1915 dump_base_name = name && name[0] ? name : "gccdump";
1917 /* Other front-end initialization. */
1918 input_location = BUILTINS_LOCATION;
1919 if (lang_hooks.init () == 0)
1920 return 0;
1921 input_location = save_loc;
1923 if (!flag_wpa)
1925 init_asm_output (name);
1927 /* If stack usage information is desired, open the output file. */
1928 if (flag_stack_usage)
1929 stack_usage_file = open_auxiliary_file ("su");
1932 /* This creates various _DECL nodes, so needs to be called after the
1933 front end is initialized. */
1934 init_eh ();
1936 /* Do the target-specific parts of the initialization. */
1937 lang_dependent_init_target ();
1939 if (!flag_wpa)
1941 /* If dbx symbol table desired, initialize writing it and output the
1942 predefined types. */
1943 timevar_push (TV_SYMOUT);
1945 /* Now we have the correct original filename, we can initialize
1946 debug output. */
1947 (*debug_hooks->init) (name);
1949 timevar_pop (TV_SYMOUT);
1952 return 1;
1956 /* Reinitialize everything when target parameters, such as register usage,
1957 have changed. */
1958 void
1959 target_reinit (void)
1961 struct rtl_data saved_x_rtl;
1962 rtx *saved_regno_reg_rtx;
1963 tree saved_optimization_current_node;
1964 struct target_optabs *saved_this_fn_optabs;
1966 /* Temporarily switch to the default optimization node, so that
1967 *this_target_optabs is set to the default, not reflecting
1968 whatever a previous function used for the optimize
1969 attribute. */
1970 saved_optimization_current_node = optimization_current_node;
1971 saved_this_fn_optabs = this_fn_optabs;
1972 if (saved_optimization_current_node != optimization_default_node)
1974 optimization_current_node = optimization_default_node;
1975 cl_optimization_restore
1976 (&global_options,
1977 TREE_OPTIMIZATION (optimization_default_node));
1979 this_fn_optabs = this_target_optabs;
1981 /* Save *crtl and regno_reg_rtx around the reinitialization
1982 to allow target_reinit being called even after prepare_function_start. */
1983 saved_regno_reg_rtx = regno_reg_rtx;
1984 if (saved_regno_reg_rtx)
1986 saved_x_rtl = *crtl;
1987 memset (crtl, '\0', sizeof (*crtl));
1988 regno_reg_rtx = NULL;
1991 this_target_rtl->target_specific_initialized = false;
1993 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1994 to initialize reg_raw_mode[]. */
1995 init_emit_regs ();
1997 /* This invokes target hooks to set fixed_reg[] etc, which is
1998 mode-dependent. */
1999 init_regs ();
2001 /* Reinitialize lang-dependent parts. */
2002 lang_dependent_init_target ();
2004 /* Restore the original optimization node. */
2005 if (saved_optimization_current_node != optimization_default_node)
2007 optimization_current_node = saved_optimization_current_node;
2008 cl_optimization_restore (&global_options,
2009 TREE_OPTIMIZATION (optimization_current_node));
2011 this_fn_optabs = saved_this_fn_optabs;
2013 /* Restore regno_reg_rtx at the end, as free_after_compilation from
2014 expand_dummy_function_end clears it. */
2015 if (saved_regno_reg_rtx)
2017 *crtl = saved_x_rtl;
2018 regno_reg_rtx = saved_regno_reg_rtx;
2019 saved_regno_reg_rtx = NULL;
2023 void
2024 dump_memory_report (bool final)
2026 dump_line_table_statistics ();
2027 ggc_print_statistics ();
2028 stringpool_statistics ();
2029 dump_tree_statistics ();
2030 dump_gimple_statistics ();
2031 dump_rtx_statistics ();
2032 dump_alloc_pool_statistics ();
2033 dump_bitmap_statistics ();
2034 dump_hash_table_loc_statistics ();
2035 dump_vec_loc_statistics ();
2036 dump_ggc_loc_statistics (final);
2037 dump_alias_stats (stderr);
2038 dump_pta_stats (stderr);
2041 /* Clean up: close opened files, etc. */
2043 static void
2044 finalize (bool no_backend)
2046 /* Close the dump files. */
2047 if (flag_gen_aux_info)
2049 fclose (aux_info_file);
2050 aux_info_file = NULL;
2051 if (seen_error ())
2052 unlink (aux_info_file_name);
2055 /* Close non-debugging input and output files. Take special care to note
2056 whether fclose returns an error, since the pages might still be on the
2057 buffer chain while the file is open. */
2059 if (asm_out_file)
2061 if (ferror (asm_out_file) != 0)
2062 fatal_error (input_location, "error writing to %s: %m", asm_file_name);
2063 if (fclose (asm_out_file) != 0)
2064 fatal_error (input_location, "error closing %s: %m", asm_file_name);
2065 asm_out_file = NULL;
2068 if (stack_usage_file)
2070 fclose (stack_usage_file);
2071 stack_usage_file = NULL;
2074 if (seen_error ())
2075 coverage_remove_note_file ();
2077 if (!no_backend)
2079 statistics_fini ();
2081 g->get_passes ()->finish_optimization_passes ();
2083 lra_finish_once ();
2086 if (mem_report)
2087 dump_memory_report (true);
2089 if (profile_report)
2090 dump_profile_report ();
2092 /* Language-specific end of compilation actions. */
2093 lang_hooks.finish ();
2096 static bool
2097 standard_type_bitsize (int bitsize)
2099 /* As a special exception, we always want __int128 enabled if possible. */
2100 if (bitsize == 128)
2101 return false;
2102 if (bitsize == CHAR_TYPE_SIZE
2103 || bitsize == SHORT_TYPE_SIZE
2104 || bitsize == INT_TYPE_SIZE
2105 || bitsize == LONG_TYPE_SIZE
2106 || bitsize == LONG_LONG_TYPE_SIZE)
2107 return true;
2108 return false;
2111 /* Initialize the compiler, and compile the input file. */
2112 static void
2113 do_compile ()
2115 process_options ();
2117 /* Don't do any more if an error has already occurred. */
2118 if (!seen_error ())
2120 int i;
2122 timevar_start (TV_PHASE_SETUP);
2124 optimization_records_start ();
2126 /* This must be run always, because it is needed to compute the FP
2127 predefined macros, such as __LDBL_MAX__, for targets using non
2128 default FP formats. */
2129 init_adjust_machine_modes ();
2130 init_derived_machine_modes ();
2132 /* This must happen after the backend has a chance to process
2133 command line options, but before the parsers are
2134 initialized. */
2135 for (i = 0; i < NUM_INT_N_ENTS; i ++)
2136 if (targetm.scalar_mode_supported_p (int_n_data[i].m)
2137 && ! standard_type_bitsize (int_n_data[i].bitsize))
2138 int_n_enabled_p[i] = true;
2139 else
2140 int_n_enabled_p[i] = false;
2142 /* Set up the back-end if requested. */
2143 if (!no_backend)
2144 backend_init ();
2146 /* Language-dependent initialization. Returns true on success. */
2147 if (lang_dependent_init (main_input_filename))
2149 /* Initialize yet another pass. */
2151 ggc_protect_identifiers = true;
2153 symtab->initialize ();
2154 init_final (main_input_filename);
2155 coverage_init (aux_base_name);
2156 statistics_init ();
2157 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
2159 timevar_stop (TV_PHASE_SETUP);
2161 compile_file ();
2163 else
2165 timevar_stop (TV_PHASE_SETUP);
2168 timevar_start (TV_PHASE_FINALIZE);
2170 finalize (no_backend);
2172 timevar_stop (TV_PHASE_FINALIZE);
2176 toplev::toplev (timer *external_timer,
2177 bool init_signals)
2178 : m_use_TV_TOTAL (external_timer == NULL),
2179 m_init_signals (init_signals)
2181 if (external_timer)
2182 g_timer = external_timer;
2185 toplev::~toplev ()
2187 if (g_timer && m_use_TV_TOTAL)
2189 g_timer->stop (TV_TOTAL);
2190 g_timer->print (stderr);
2191 delete g_timer;
2192 g_timer = NULL;
2196 /* Potentially call timevar_init (which will create g_timevars if it
2197 doesn't already exist). */
2199 void
2200 toplev::start_timevars ()
2202 if (time_report || !quiet_flag || flag_detailed_statistics)
2203 timevar_init ();
2205 timevar_start (TV_TOTAL);
2208 /* Handle -fself-test. */
2210 void
2211 toplev::run_self_tests ()
2213 if (no_backend)
2215 error_at (UNKNOWN_LOCATION, "self-tests incompatible with -E");
2216 return;
2218 #if CHECKING_P
2219 /* Reset some state. */
2220 input_location = UNKNOWN_LOCATION;
2221 bitmap_obstack_initialize (NULL);
2223 /* Run the tests; any failures will lead to an abort of the process.
2224 Use "make selftests-gdb" to run under the debugger. */
2225 ::selftest::run_tests ();
2227 /* Cleanup. */
2228 bitmap_obstack_release (NULL);
2229 #else
2230 inform (UNKNOWN_LOCATION, "self-tests are not enabled in this build");
2231 #endif /* #if CHECKING_P */
2234 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2235 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2236 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2238 It is not safe to call this function more than once. */
2241 toplev::main (int argc, char **argv)
2243 /* Parsing and gimplification sometimes need quite large stack.
2244 Increase stack size limits if possible. */
2245 stack_limit_increase (64 * 1024 * 1024);
2247 expandargv (&argc, &argv);
2249 /* Initialization of GCC's environment, and diagnostics. */
2250 general_init (argv[0], m_init_signals);
2252 /* One-off initialization of options that does not need to be
2253 repeated when options are added for particular functions. */
2254 init_options_once ();
2255 init_opts_obstack ();
2257 /* Initialize global options structures; this must be repeated for
2258 each structure used for parsing options. */
2259 init_options_struct (&global_options, &global_options_set);
2260 lang_hooks.init_options_struct (&global_options);
2262 /* Convert the options to an array. */
2263 decode_cmdline_options_to_array_default_mask (argc,
2264 CONST_CAST2 (const char **,
2265 char **, argv),
2266 &save_decoded_options,
2267 &save_decoded_options_count);
2269 /* Perform language-specific options initialization. */
2270 lang_hooks.init_options (save_decoded_options_count, save_decoded_options);
2272 /* Parse the options and do minimal processing; basically just
2273 enough to default flags appropriately. */
2274 decode_options (&global_options, &global_options_set,
2275 save_decoded_options, save_decoded_options_count,
2276 UNKNOWN_LOCATION, global_dc,
2277 targetm.target_option.override);
2279 handle_common_deferred_options ();
2281 init_local_tick ();
2283 initialize_plugins ();
2285 if (version_flag)
2286 print_version (stderr, "", true);
2288 if (help_flag)
2289 print_plugins_help (stderr, "");
2291 /* Exit early if we can (e.g. -help). */
2292 if (!exit_after_options)
2294 if (m_use_TV_TOTAL)
2295 start_timevars ();
2296 do_compile ();
2299 if (warningcount || errorcount || werrorcount)
2300 print_ignored_options ();
2302 if (flag_self_test)
2303 run_self_tests ();
2305 /* Invoke registered plugin callbacks if any. Some plugins could
2306 emit some diagnostics here. */
2307 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2309 if (flag_diagnostics_generate_patch)
2311 gcc_assert (global_dc->edit_context_ptr);
2313 pretty_printer pp;
2314 pp_show_color (&pp) = pp_show_color (global_dc->printer);
2315 global_dc->edit_context_ptr->print_diff (&pp, true);
2316 pp_flush (&pp);
2319 diagnostic_finish (global_dc);
2321 finalize_plugins ();
2323 after_memory_report = true;
2325 if (seen_error () || werrorcount)
2326 return (FATAL_EXIT_CODE);
2328 return (SUCCESS_EXIT_CODE);
2331 /* For those that want to, this function aims to clean up enough state that
2332 you can call toplev::main again. */
2333 void
2334 toplev::finalize (void)
2336 rtl_initialized = false;
2337 this_target_rtl->target_specific_initialized = false;
2339 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2340 ipa_reference_c_finalize ();
2341 ipa_fnsummary_c_finalize ();
2343 cgraph_c_finalize ();
2344 cgraphunit_c_finalize ();
2345 dwarf2out_c_finalize ();
2346 gcse_c_finalize ();
2347 ipa_cp_c_finalize ();
2348 ira_costs_c_finalize ();
2349 params_c_finalize ();
2351 finalize_options_struct (&global_options);
2352 finalize_options_struct (&global_options_set);
2354 /* save_decoded_options uses opts_obstack, so these must
2355 be cleaned up together. */
2356 obstack_free (&opts_obstack, NULL);
2357 XDELETEVEC (save_decoded_options);
2358 save_decoded_options = NULL;
2359 save_decoded_options_count = 0;
2361 /* Clean up the context (and pass_manager etc). */
2362 delete g;
2363 g = NULL;