c, c++: attribute format on a ctor with a vbase [PR101833, PR47634]
[official-gcc.git] / gcc / toplev.cc
blobed546b2cad80e4fa6e3614c8b572c8d6290ee77a
1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2022 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 "reload.h"
56 #include "lra.h"
57 #include "dwarf2asm.h"
58 #include "debug.h"
59 #include "common/common-target.h"
60 #include "langhooks.h"
61 #include "cfgloop.h" /* for init_set_costs */
62 #include "hosthooks.h"
63 #include "opts.h"
64 #include "opts-diagnostic.h"
65 #include "stringpool.h"
66 #include "attribs.h"
67 #include "asan.h"
68 #include "tsan.h"
69 #include "plugin.h"
70 #include "context.h"
71 #include "pass_manager.h"
72 #include "auto-profile.h"
73 #include "dwarf2out.h"
74 #include "ipa-reference.h"
75 #include "symbol-summary.h"
76 #include "tree-vrp.h"
77 #include "ipa-prop.h"
78 #include "gcse.h"
79 #include "omp-offload.h"
80 #include "edit-context.h"
81 #include "tree-pass.h"
82 #include "dumpfile.h"
83 #include "ipa-fnsummary.h"
84 #include "dump-context.h"
85 #include "print-tree.h"
86 #include "optinfo-emit-json.h"
87 #include "ipa-modref-tree.h"
88 #include "ipa-modref.h"
89 #include "ipa-param-manipulation.h"
90 #include "dbgcnt.h"
92 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
93 #include "dbxout.h"
94 #endif
96 #ifdef XCOFF_DEBUGGING_INFO
97 #include "xcoffout.h" /* Needed for external data declarations. */
98 #endif
100 #include "selftest.h"
102 #ifdef HAVE_isl
103 #include <isl/version.h>
104 #endif
106 static void general_init (const char *, bool);
107 static void backend_init (void);
108 static int lang_dependent_init (const char *);
109 static void init_asm_output (const char *);
110 static void finalize (bool);
112 static void crash_signal (int) ATTRIBUTE_NORETURN;
113 static void compile_file (void);
115 /* Decoded options, and number of such options. */
116 struct cl_decoded_option *save_decoded_options;
117 unsigned int save_decoded_options_count;
119 /* Vector of saved Optimization decoded command line options. */
120 vec<cl_decoded_option> *save_opt_decoded_options;
122 /* Debug hooks - dependent upon command line options. */
124 const struct gcc_debug_hooks *debug_hooks;
126 /* The FUNCTION_DECL for the function currently being compiled,
127 or 0 if between functions. */
128 tree current_function_decl;
130 /* Set to the FUNC_BEGIN label of the current function, or NULL
131 if none. */
132 const char * current_function_func_begin_label;
134 /* A random sequence of characters, unless overridden by user. */
135 static const char *flag_random_seed;
137 /* A local time stamp derived from the time of compilation. It will be
138 zero if the system cannot provide a time. It will be -1u, if the
139 user has specified a particular random seed. */
140 unsigned local_tick;
142 /* Random number for this compilation */
143 HOST_WIDE_INT random_seed;
145 /* -f flags. */
147 /* When non-NULL, indicates that whenever space is allocated on the
148 stack, the resulting stack pointer must not pass this
149 address---that is, for stacks that grow downward, the stack pointer
150 must always be greater than or equal to this address; for stacks
151 that grow upward, the stack pointer must be less than this address.
152 At present, the rtx may be either a REG or a SYMBOL_REF, although
153 the support provided depends on the backend. */
154 rtx stack_limit_rtx;
156 class target_flag_state default_target_flag_state;
157 #if SWITCHABLE_TARGET
158 class target_flag_state *this_target_flag_state = &default_target_flag_state;
159 #else
160 #define this_target_flag_state (&default_target_flag_state)
161 #endif
163 /* The user symbol prefix after having resolved same. */
164 const char *user_label_prefix;
166 /* Output files for assembler code (real compiler output)
167 and debugging dumps. */
169 FILE *asm_out_file;
170 FILE *aux_info_file;
171 FILE *callgraph_info_file = NULL;
172 static bitmap callgraph_info_external_printed;
173 FILE *stack_usage_file = NULL;
175 /* The current working directory of a translation. It's generally the
176 directory from which compilation was initiated, but a preprocessed
177 file may specify the original directory in which it was
178 created. */
180 static const char *src_pwd;
182 /* Initialize src_pwd with the given string, and return true. If it
183 was already initialized, return false. As a special case, it may
184 be called with a NULL argument to test whether src_pwd has NOT been
185 initialized yet. */
187 bool
188 set_src_pwd (const char *pwd)
190 if (src_pwd)
192 if (strcmp (src_pwd, pwd) == 0)
193 return true;
194 else
195 return false;
198 src_pwd = xstrdup (pwd);
199 return true;
202 /* Return the directory from which the translation unit was initiated,
203 in case set_src_pwd() was not called before to assign it a
204 different value. */
206 const char *
207 get_src_pwd (void)
209 if (! src_pwd)
211 src_pwd = getpwd ();
212 if (!src_pwd)
213 src_pwd = ".";
216 return src_pwd;
219 /* Called when the start of a function definition is parsed,
220 this function prints on stderr the name of the function. */
221 void
222 announce_function (tree decl)
224 if (!quiet_flag)
226 if (rtl_dump_and_exit)
227 fprintf (stderr, "%s ",
228 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
229 else
230 fprintf (stderr, " %s",
231 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
232 fflush (stderr);
233 pp_needs_newline (global_dc->printer) = true;
234 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
238 /* Initialize local_tick with the time of day, or -1 if
239 flag_random_seed is set. */
241 static void
242 init_local_tick (void)
244 if (!flag_random_seed)
246 #ifdef HAVE_GETTIMEOFDAY
248 struct timeval tv;
250 gettimeofday (&tv, NULL);
251 local_tick = (unsigned) tv.tv_sec * 1000 + tv.tv_usec / 1000;
253 #else
255 time_t now = time (NULL);
257 if (now != (time_t)-1)
258 local_tick = (unsigned) now;
260 #endif
262 else
263 local_tick = -1;
266 /* Obtain the random_seed. Unless NOINIT, initialize it if
267 it's not provided in the command line. */
269 HOST_WIDE_INT
270 get_random_seed (bool noinit)
272 if (!random_seed && !noinit)
274 int fd = open ("/dev/urandom", O_RDONLY);
275 if (fd >= 0)
277 if (read (fd, &random_seed, sizeof (random_seed))
278 != sizeof (random_seed))
279 random_seed = 0;
280 close (fd);
282 if (!random_seed)
283 random_seed = local_tick ^ getpid ();
285 return random_seed;
288 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */
290 void
291 set_random_seed (const char *val)
293 flag_random_seed = val;
294 if (flag_random_seed)
296 char *endp;
298 /* When the driver passed in a hex number don't crc it again */
299 random_seed = strtoul (flag_random_seed, &endp, 0);
300 if (!(endp > flag_random_seed && *endp == 0))
301 random_seed = crc32_string (0, flag_random_seed);
305 /* Handler for fatal signals, such as SIGSEGV. These are transformed
306 into ICE messages, which is much more user friendly. In case the
307 error printer crashes, reset the signal to prevent infinite recursion. */
309 static void
310 crash_signal (int signo)
312 signal (signo, SIG_DFL);
314 /* If we crashed while processing an ASM statement, then be a little more
315 graceful. It's most likely the user's fault. */
316 if (this_is_asm_operands)
318 output_operand_lossage ("unrecoverable error");
319 exit (FATAL_EXIT_CODE);
322 internal_error ("%s", strsignal (signo));
325 /* A subroutine of wrapup_global_declarations. We've come to the end of
326 the compilation unit. All deferred variables should be undeferred,
327 and all incomplete decls should be finalized. */
329 void
330 wrapup_global_declaration_1 (tree decl)
332 /* We're not deferring this any longer. Assignment is conditional to
333 avoid needlessly dirtying PCH pages. */
334 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
335 && DECL_DEFER_OUTPUT (decl) != 0)
336 DECL_DEFER_OUTPUT (decl) = 0;
338 if (VAR_P (decl) && DECL_SIZE (decl) == 0)
339 lang_hooks.finish_incomplete_decl (decl);
342 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
343 needs to be output. Return true if it is output. */
345 bool
346 wrapup_global_declaration_2 (tree decl)
348 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl)
349 || (VAR_P (decl) && DECL_HAS_VALUE_EXPR_P (decl)))
350 return false;
352 /* Don't write out static consts, unless we still need them.
354 We also keep static consts if not optimizing (for debugging),
355 unless the user specified -fno-keep-static-consts.
356 ??? They might be better written into the debug information.
357 This is possible when using DWARF.
359 A language processor that wants static constants to be always
360 written out (even if it is not used) is responsible for
361 calling rest_of_decl_compilation itself. E.g. the C front-end
362 calls rest_of_decl_compilation from finish_decl.
363 One motivation for this is that is conventional in some
364 environments to write things like:
365 static const char rcsid[] = "... version string ...";
366 intending to force the string to be in the executable.
368 A language processor that would prefer to have unneeded
369 static constants "optimized away" would just defer writing
370 them out until here. E.g. C++ does this, because static
371 constants are often defined in header files.
373 ??? A tempting alternative (for both C and C++) would be
374 to force a constant to be written if and only if it is
375 defined in a main file, as opposed to an include file. */
377 if (VAR_P (decl) && TREE_STATIC (decl))
379 varpool_node *node;
380 bool needed = true;
381 node = varpool_node::get (decl);
383 if (!node && flag_ltrans)
384 needed = false;
385 else if (node && node->definition)
386 needed = false;
387 else if (node && node->alias)
388 needed = false;
389 else if (!symtab->global_info_ready
390 && (TREE_USED (decl)
391 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
392 /* needed */;
393 else if (node && node->analyzed)
394 /* needed */;
395 else if (DECL_COMDAT (decl))
396 needed = false;
397 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
398 && (optimize || !flag_keep_static_consts
399 || DECL_ARTIFICIAL (decl)))
400 needed = false;
402 if (needed)
404 rest_of_decl_compilation (decl, 1, 1);
405 return true;
409 return false;
412 /* Do any final processing required for the declarations in VEC, of
413 which there are LEN. We write out inline functions and variables
414 that have been deferred until this point, but which are required.
415 Returns nonzero if anything was put out. */
417 bool
418 wrapup_global_declarations (tree *vec, int len)
420 bool reconsider, output_something = false;
421 int i;
423 for (i = 0; i < len; i++)
424 wrapup_global_declaration_1 (vec[i]);
426 /* Now emit any global variables or functions that we have been
427 putting off. We need to loop in case one of the things emitted
428 here references another one which comes earlier in the list. */
431 reconsider = false;
432 for (i = 0; i < len; i++)
433 reconsider |= wrapup_global_declaration_2 (vec[i]);
434 if (reconsider)
435 output_something = true;
437 while (reconsider);
439 return output_something;
442 /* Compile an entire translation unit. Write a file of assembly
443 output and various debugging dumps. */
445 static void
446 compile_file (void)
448 timevar_start (TV_PHASE_PARSING);
449 timevar_push (TV_PARSE_GLOBAL);
451 /* Parse entire file and generate initial debug information. */
452 lang_hooks.parse_file ();
454 timevar_pop (TV_PARSE_GLOBAL);
455 timevar_stop (TV_PHASE_PARSING);
457 if (flag_dump_locations)
458 dump_location_info (stderr);
460 free_attr_data ();
462 /* Compilation is now finished except for writing
463 what's left of the symbol table output. */
465 if (flag_syntax_only || flag_wpa)
466 return;
468 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
469 and this shouldn't influence any types built by the middle-end
470 from now on (like gcov_info_type). */
471 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;
473 ggc_protect_identifiers = false;
475 /* Run the actual compilation process. */
476 if (!in_lto_p)
478 timevar_start (TV_PHASE_OPT_GEN);
479 symtab->finalize_compilation_unit ();
480 timevar_stop (TV_PHASE_OPT_GEN);
483 /* Perform any post compilation-proper parser cleanups and
484 processing. This is currently only needed for the C++ parser,
485 which can be hopefully cleaned up so this hook is no longer
486 necessary. */
487 if (lang_hooks.decls.post_compilation_parsing_cleanups)
488 lang_hooks.decls.post_compilation_parsing_cleanups ();
490 dump_context::get ().finish_any_json_writer ();
492 if (seen_error ())
493 return;
495 timevar_start (TV_PHASE_LATE_ASM);
497 /* Compilation unit is finalized. When producing non-fat LTO object, we are
498 basically finished. */
499 if ((in_lto_p && flag_incremental_link != INCREMENTAL_LINK_LTO)
500 || !flag_lto || flag_fat_lto_objects)
502 /* File-scope initialization for AddressSanitizer. */
503 if (flag_sanitize & SANITIZE_ADDRESS)
504 asan_finish_file ();
506 if (flag_sanitize & SANITIZE_THREAD)
507 tsan_finish_file ();
509 if (gate_hwasan ())
510 hwasan_finish_file ();
512 omp_finish_file ();
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 insn_locations_init ();
524 targetm.asm_out.code_end ();
526 /* Do dbx symbols. */
527 timevar_push (TV_SYMOUT);
529 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
530 dwarf2out_frame_finish ();
531 #endif
533 debuginfo_start ();
534 (*debug_hooks->finish) (main_input_filename);
535 debuginfo_stop ();
536 timevar_pop (TV_SYMOUT);
538 /* Output some stuff at end of file if nec. */
540 dw2_output_indirect_constants ();
542 /* Flush any pending external directives. */
543 process_pending_assemble_externals ();
546 /* Let linker plugin know that this is a slim object and must be LTOed
547 even when user did not ask for it. */
548 if (flag_generate_lto && !flag_fat_lto_objects)
550 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
551 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE, "__gnu_lto_slim",
552 HOST_WIDE_INT_1U, 8);
553 #elif defined ASM_OUTPUT_ALIGNED_COMMON
554 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_slim",
555 HOST_WIDE_INT_1U, 8);
556 #else
557 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_slim",
558 HOST_WIDE_INT_1U,
559 HOST_WIDE_INT_1U);
560 #endif
563 /* Attach a special .ident directive to the end of the file to identify
564 the version of GCC which compiled this code. The format of the .ident
565 string is patterned after the ones produced by native SVR4 compilers. */
566 if (!flag_no_ident)
568 const char *pkg_version = "(GNU) ";
569 char *ident_str;
571 if (strcmp ("(GCC) ", pkgversion_string))
572 pkg_version = pkgversion_string;
574 ident_str = ACONCAT (("GCC: ", pkg_version, version_string, NULL));
575 targetm.asm_out.output_ident (ident_str);
578 /* Auto profile finalization. */
579 if (flag_auto_profile)
580 end_auto_profile ();
582 /* Invoke registered plugin callbacks. */
583 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
585 /* This must be at the end. Some target ports emit end of file directives
586 into the assembly file here, and hence we cannot output anything to the
587 assembly file after this point. */
588 targetm.asm_out.file_end ();
590 timevar_stop (TV_PHASE_LATE_ASM);
593 /* Print version information to FILE.
594 Each line begins with INDENT (for the case where FILE is the
595 assembler output file).
597 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
598 proper and can print pertinent state (e.g. params and plugins).
600 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
601 compiler, and we don't hold the mutex on the compiler's global state:
602 we can't print params and plugins, since they might not be initialized,
603 or might be being manipulated by a compile running in another
604 thread. */
606 void
607 print_version (FILE *file, const char *indent, bool show_global_state)
609 static const char fmt1[] =
610 #ifdef __GNUC__
611 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
612 #else
613 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
614 #endif
616 static const char fmt2[] =
617 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n");
618 static const char fmt3[] =
619 N_("%s%swarning: %s header version %s differs from library version %s.\n");
620 static const char fmt4[] =
621 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
622 #ifndef __VERSION__
623 #define __VERSION__ "[?]"
624 #endif
625 fprintf (file,
626 file == stderr ? _(fmt1) : fmt1,
627 indent, *indent != 0 ? " " : "",
628 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
629 indent, __VERSION__);
631 /* We need to stringify the GMP macro values. Ugh, gmp_version has
632 two string formats, "i.j.k" and "i.j" when k is zero. As of
633 gmp-4.3.0, GMP always uses the 3 number format. */
634 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
635 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
636 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
637 #define GCC_GMP_VERSION \
638 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
639 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
640 #define GCC_GMP_STRINGIFY_VERSION \
641 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
642 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
643 #else
644 #define GCC_GMP_STRINGIFY_VERSION \
645 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
646 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
647 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
648 #endif
649 fprintf (file,
650 file == stderr ? _(fmt2) : fmt2,
651 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING,
652 #ifndef HAVE_isl
653 "none"
654 #else
655 isl_version ()
656 #endif
658 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
659 fprintf (file,
660 file == stderr ? _(fmt3) : fmt3,
661 indent, *indent != 0 ? " " : "",
662 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
663 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
664 fprintf (file,
665 file == stderr ? _(fmt3) : fmt3,
666 indent, *indent != 0 ? " " : "",
667 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
668 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
669 fprintf (file,
670 file == stderr ? _(fmt3) : fmt3,
671 indent, *indent != 0 ? " " : "",
672 "MPC", MPC_VERSION_STRING, mpc_get_version ());
674 if (show_global_state)
676 fprintf (file,
677 file == stderr ? _(fmt4) : fmt4,
678 indent, *indent != 0 ? " " : "",
679 param_ggc_min_expand, param_ggc_min_heapsize);
681 print_plugins_versions (file, indent);
687 /* Open assembly code output file. Do this even if -fsyntax-only is
688 on, because then the driver will have provided the name of a
689 temporary file or bit bucket for us. NAME is the file specified on
690 the command line, possibly NULL. */
691 static void
692 init_asm_output (const char *name)
694 if (name == NULL && asm_file_name == 0)
695 asm_out_file = stdout;
696 else
698 if (asm_file_name == 0)
700 int len = strlen (dump_base_name);
701 char *dumpname = XNEWVEC (char, len + 6);
703 memcpy (dumpname, dump_base_name, len + 1);
704 strip_off_ending (dumpname, len);
705 strcat (dumpname, ".s");
706 asm_file_name = dumpname;
708 if (!strcmp (asm_file_name, "-"))
709 asm_out_file = stdout;
710 else if (!canonical_filename_eq (asm_file_name, name)
711 || !strcmp (asm_file_name, HOST_BIT_BUCKET))
712 asm_out_file = fopen (asm_file_name, "w");
713 else
714 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
715 line in the current file. */
716 fatal_error (UNKNOWN_LOCATION,
717 "input file %qs is the same as output file",
718 asm_file_name);
719 if (asm_out_file == 0)
720 fatal_error (UNKNOWN_LOCATION,
721 "cannot open %qs for writing: %m", asm_file_name);
724 if (!flag_syntax_only)
726 targetm.asm_out.file_start ();
728 if (flag_record_gcc_switches)
730 if (targetm.asm_out.record_gcc_switches)
732 const char *str
733 = gen_producer_string (lang_hooks.name,
734 save_decoded_options,
735 save_decoded_options_count);
736 targetm.asm_out.record_gcc_switches (str);
738 else
739 inform (UNKNOWN_LOCATION,
740 "%<-frecord-gcc-switches%> is not supported by "
741 "the current target");
744 if (flag_verbose_asm)
746 print_version (asm_out_file, ASM_COMMENT_START, true);
747 fputs (ASM_COMMENT_START, asm_out_file);
748 fputs (" options passed: ", asm_out_file);
749 char *cmdline = gen_command_line_string (save_decoded_options,
750 save_decoded_options_count);
751 fputs (cmdline, asm_out_file);
752 free (cmdline);
753 fputc ('\n', asm_out_file);
758 /* A helper function; used as the reallocator function for cpp's line
759 table. */
760 static void *
761 realloc_for_line_map (void *ptr, size_t len)
763 return ggc_realloc (ptr, len);
766 /* A helper function: used as the allocator function for
767 identifier_to_locale. */
768 static void *
769 alloc_for_identifier_to_locale (size_t len)
771 return ggc_alloc_atomic (len);
774 /* Output stack usage information. */
775 static void
776 output_stack_usage_1 (FILE *cf)
778 static bool warning_issued = false;
779 enum stack_usage_kind_type { STATIC = 0, DYNAMIC, DYNAMIC_BOUNDED };
780 const char *stack_usage_kind_str[] = {
781 "static",
782 "dynamic",
783 "dynamic,bounded"
785 HOST_WIDE_INT stack_usage = current_function_static_stack_size;
786 enum stack_usage_kind_type stack_usage_kind;
788 if (stack_usage < 0)
790 if (!warning_issued)
792 warning (0, "stack usage computation not supported for this target");
793 warning_issued = true;
795 return;
798 stack_usage_kind = STATIC;
800 /* Add the maximum amount of space pushed onto the stack. */
801 if (maybe_ne (current_function_pushed_stack_size, 0))
803 HOST_WIDE_INT extra;
804 if (current_function_pushed_stack_size.is_constant (&extra))
806 stack_usage += extra;
807 stack_usage_kind = DYNAMIC_BOUNDED;
809 else
811 extra = constant_lower_bound (current_function_pushed_stack_size);
812 stack_usage += extra;
813 stack_usage_kind = DYNAMIC;
817 /* Now on to the tricky part: dynamic stack allocation. */
818 if (current_function_allocates_dynamic_stack_space)
820 if (stack_usage_kind != DYNAMIC)
822 if (current_function_has_unbounded_dynamic_stack_size)
823 stack_usage_kind = DYNAMIC;
824 else
825 stack_usage_kind = DYNAMIC_BOUNDED;
828 /* Add the size even in the unbounded case, this can't hurt. */
829 stack_usage += current_function_dynamic_stack_size;
832 if (cf && flag_callgraph_info & CALLGRAPH_INFO_STACK_USAGE)
833 fprintf (cf, "\\n" HOST_WIDE_INT_PRINT_DEC " bytes (%s)",
834 stack_usage,
835 stack_usage_kind_str[stack_usage_kind]);
837 if (stack_usage_file)
839 print_decl_identifier (stack_usage_file, current_function_decl,
840 PRINT_DECL_ORIGIN | PRINT_DECL_NAME);
841 fprintf (stack_usage_file, "\t" HOST_WIDE_INT_PRINT_DEC"\t%s\n",
842 stack_usage, stack_usage_kind_str[stack_usage_kind]);
845 if (warn_stack_usage >= 0 && warn_stack_usage < HOST_WIDE_INT_MAX)
847 const location_t loc = DECL_SOURCE_LOCATION (current_function_decl);
849 if (stack_usage_kind == DYNAMIC)
850 warning_at (loc, OPT_Wstack_usage_, "stack usage might be unbounded");
851 else if (stack_usage > warn_stack_usage)
853 if (stack_usage_kind == DYNAMIC_BOUNDED)
854 warning_at (loc,
855 OPT_Wstack_usage_, "stack usage might be %wu bytes",
856 stack_usage);
857 else
858 warning_at (loc, OPT_Wstack_usage_, "stack usage is %wu bytes",
859 stack_usage);
864 /* Dump placeholder node for indirect calls in VCG format. */
866 #define INDIRECT_CALL_NAME "__indirect_call"
868 static void
869 dump_final_node_vcg_start (FILE *f, tree decl)
871 fputs ("node: { title: \"", f);
872 if (decl)
873 print_decl_identifier (f, decl, PRINT_DECL_UNIQUE_NAME);
874 else
875 fputs (INDIRECT_CALL_NAME, f);
876 fputs ("\" label: \"", f);
877 if (decl)
879 print_decl_identifier (f, decl, PRINT_DECL_NAME);
880 fputs ("\\n", f);
881 print_decl_identifier (f, decl, PRINT_DECL_ORIGIN);
883 else
884 fputs ("Indirect Call Placeholder", f);
887 /* Dump final cgraph edge in VCG format. */
889 static void
890 dump_final_callee_vcg (FILE *f, location_t location, tree callee)
892 if ((!callee || DECL_EXTERNAL (callee))
893 && bitmap_set_bit (callgraph_info_external_printed,
894 callee ? DECL_UID (callee) + 1 : 0))
896 dump_final_node_vcg_start (f, callee);
897 fputs ("\" shape : ellipse }\n", f);
900 fputs ("edge: { sourcename: \"", f);
901 print_decl_identifier (f, current_function_decl, PRINT_DECL_UNIQUE_NAME);
902 fputs ("\" targetname: \"", f);
903 if (callee)
904 print_decl_identifier (f, callee, PRINT_DECL_UNIQUE_NAME);
905 else
906 fputs (INDIRECT_CALL_NAME, f);
907 if (LOCATION_LOCUS (location) != UNKNOWN_LOCATION)
909 expanded_location loc;
910 fputs ("\" label: \"", f);
911 loc = expand_location (location);
912 fprintf (f, "%s:%d:%d", loc.file, loc.line, loc.column);
914 fputs ("\" }\n", f);
917 /* Dump final cgraph node in VCG format. */
919 static void
920 dump_final_node_vcg (FILE *f)
922 dump_final_node_vcg_start (f, current_function_decl);
924 if (flag_stack_usage_info
925 || (flag_callgraph_info & CALLGRAPH_INFO_STACK_USAGE))
926 output_stack_usage_1 (f);
928 if (flag_callgraph_info & CALLGRAPH_INFO_DYNAMIC_ALLOC)
930 fprintf (f, "\\n%u dynamic objects", vec_safe_length (cfun->su->dallocs));
932 unsigned i;
933 callinfo_dalloc *cda;
934 FOR_EACH_VEC_SAFE_ELT (cfun->su->dallocs, i, cda)
936 expanded_location loc = expand_location (cda->location);
937 fprintf (f, "\\n %s", cda->name);
938 fprintf (f, " %s:%d:%d", loc.file, loc.line, loc.column);
941 vec_free (cfun->su->dallocs);
942 cfun->su->dallocs = NULL;
945 fputs ("\" }\n", f);
947 unsigned i;
948 callinfo_callee *c;
949 FOR_EACH_VEC_SAFE_ELT (cfun->su->callees, i, c)
950 dump_final_callee_vcg (f, c->location, c->decl);
951 vec_free (cfun->su->callees);
952 cfun->su->callees = NULL;
955 /* Output stack usage and callgraph info, as requested. */
956 void
957 output_stack_usage (void)
959 if (flag_callgraph_info)
960 dump_final_node_vcg (callgraph_info_file);
961 else
962 output_stack_usage_1 (NULL);
965 /* Open an auxiliary output file. */
966 static FILE *
967 open_auxiliary_file (const char *ext)
969 char *filename;
970 FILE *file;
972 filename = concat (aux_base_name, ".", ext, NULL);
973 file = fopen (filename, "w");
974 if (!file)
975 fatal_error (input_location, "cannot open %s for writing: %m", filename);
976 free (filename);
977 return file;
980 /* Alternative diagnostics callback for reentered ICE reporting. */
982 static void
983 internal_error_reentered (diagnostic_context *, const char *, va_list *)
985 /* Flush the dump file if emergency_dump_function itself caused an ICE. */
986 if (dump_file)
987 fflush (dump_file);
990 /* Auxiliary callback for the diagnostics code. */
992 static void
993 internal_error_function (diagnostic_context *, const char *, va_list *)
995 global_dc->internal_error = internal_error_reentered;
996 warn_if_plugins ();
997 emergency_dump_function ();
1000 /* Initialization of the front end environment, before command line
1001 options are parsed. Signal handlers, internationalization etc.
1002 ARGV0 is main's argv[0]. */
1003 static void
1004 general_init (const char *argv0, bool init_signals)
1006 const char *p;
1008 p = argv0 + strlen (argv0);
1009 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1010 --p;
1011 progname = p;
1013 xmalloc_set_program_name (progname);
1015 hex_init ();
1017 /* Unlock the stdio streams. */
1018 unlock_std_streams ();
1020 gcc_init_libintl ();
1022 identifier_to_locale_alloc = alloc_for_identifier_to_locale;
1023 identifier_to_locale_free = ggc_free;
1025 /* Initialize the diagnostics reporting machinery, so option parsing
1026 can give warnings and errors. */
1027 diagnostic_initialize (global_dc, N_OPTS);
1028 global_dc->lang_mask = lang_hooks.option_lang_mask ();
1029 /* Set a default printer. Language specific initializations will
1030 override it later. */
1031 tree_diagnostics_defaults (global_dc);
1033 global_dc->show_caret
1034 = global_options_init.x_flag_diagnostics_show_caret;
1035 global_dc->show_labels_p
1036 = global_options_init.x_flag_diagnostics_show_labels;
1037 global_dc->show_line_numbers_p
1038 = global_options_init.x_flag_diagnostics_show_line_numbers;
1039 global_dc->show_cwe
1040 = global_options_init.x_flag_diagnostics_show_cwe;
1041 global_dc->path_format
1042 = (enum diagnostic_path_format)global_options_init.x_flag_diagnostics_path_format;
1043 global_dc->show_path_depths
1044 = global_options_init.x_flag_diagnostics_show_path_depths;
1045 global_dc->show_option_requested
1046 = global_options_init.x_flag_diagnostics_show_option;
1047 global_dc->min_margin_width
1048 = global_options_init.x_diagnostics_minimum_margin_width;
1049 global_dc->show_column
1050 = global_options_init.x_flag_show_column;
1051 global_dc->internal_error = internal_error_function;
1052 global_dc->option_enabled = option_enabled;
1053 global_dc->option_state = &global_options;
1054 global_dc->option_name = option_name;
1055 global_dc->get_option_url = get_option_url;
1057 if (init_signals)
1059 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1060 #ifdef SIGSEGV
1061 signal (SIGSEGV, crash_signal);
1062 #endif
1063 #ifdef SIGILL
1064 signal (SIGILL, crash_signal);
1065 #endif
1066 #ifdef SIGBUS
1067 signal (SIGBUS, crash_signal);
1068 #endif
1069 #ifdef SIGABRT
1070 signal (SIGABRT, crash_signal);
1071 #endif
1072 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1073 signal (SIGIOT, crash_signal);
1074 #endif
1075 #ifdef SIGFPE
1076 signal (SIGFPE, crash_signal);
1077 #endif
1079 /* Other host-specific signal setup. */
1080 (*host_hooks.extra_signals)();
1083 /* Initialize the garbage-collector, string pools and tree type hash
1084 table. */
1085 init_ggc ();
1086 init_stringpool ();
1087 input_location = UNKNOWN_LOCATION;
1088 line_table = ggc_alloc<line_maps> ();
1089 linemap_init (line_table, BUILTINS_LOCATION);
1090 line_table->reallocator = realloc_for_line_map;
1091 line_table->round_alloc_size = ggc_round_alloc_size;
1092 line_table->default_range_bits = 5;
1093 init_ttree ();
1095 /* Initialize register usage now so switches may override. */
1096 init_reg_sets ();
1098 /* Create the singleton holder for global state. This creates the
1099 dump manager. */
1100 g = new gcc::context ();
1102 /* Allow languages and middle-end to register their dumps before the
1103 optimization passes. */
1104 g->get_dumps ()->register_dumps ();
1106 /* Create the passes. */
1107 g->set_passes (new gcc::pass_manager (g));
1109 symtab = new (ggc_alloc <symbol_table> ()) symbol_table ();
1111 statistics_early_init ();
1112 debuginfo_early_init ();
1115 /* Return true if the current target supports -fsection-anchors. */
1117 static bool
1118 target_supports_section_anchors_p (void)
1120 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1121 return false;
1123 if (targetm.asm_out.output_anchor == NULL)
1124 return false;
1126 return true;
1129 /* Parse "N[:M][:...]" into struct align_flags A.
1130 VALUES contains parsed values (in reverse order), all processed
1131 values are popped. */
1133 static void
1134 read_log_maxskip (auto_vec<unsigned> &values, align_flags_tuple *a)
1136 unsigned n = values.pop ();
1137 if (n != 0)
1138 a->log = floor_log2 (n * 2 - 1);
1140 if (values.is_empty ())
1141 a->maxskip = n ? n - 1 : 0;
1142 else
1144 unsigned m = values.pop ();
1145 /* -falign-foo=N:M means M-1 max bytes of padding, not M. */
1146 if (m > 0)
1147 m--;
1148 a->maxskip = m;
1151 /* Normalize the tuple. */
1152 a->normalize ();
1155 /* Parse "N[:M[:N2[:M2]]]" string FLAG into a pair of struct align_flags. */
1157 static void
1158 parse_N_M (const char *flag, align_flags &a)
1160 if (flag)
1162 static hash_map <nofree_string_hash, align_flags> cache;
1163 align_flags *entry = cache.get (flag);
1164 if (entry)
1166 a = *entry;
1167 return;
1170 auto_vec<unsigned> result_values;
1171 bool r = parse_and_check_align_values (flag, NULL, result_values, false,
1172 UNKNOWN_LOCATION);
1173 if (!r)
1174 return;
1176 /* Reverse values for easier manipulation. */
1177 result_values.reverse ();
1179 read_log_maxskip (result_values, &a.levels[0]);
1180 if (!result_values.is_empty ())
1181 read_log_maxskip (result_values, &a.levels[1]);
1182 #ifdef SUBALIGN_LOG
1183 else
1185 /* N2[:M2] is not specified. This arch has a default for N2.
1186 Before -falign-foo=N:M:N2:M2 was introduced, x86 had a tweak.
1187 -falign-functions=N with N > 8 was adding secondary alignment.
1188 -falign-functions=10 was emitting this before every function:
1189 .p2align 4,,9
1190 .p2align 3
1191 Now this behavior (and more) can be explicitly requested:
1192 -falign-functions=16:10:8
1193 Retain old behavior if N2 is missing: */
1195 int align = 1 << a.levels[0].log;
1196 int subalign = 1 << SUBALIGN_LOG;
1198 if (a.levels[0].log > SUBALIGN_LOG
1199 && a.levels[0].maxskip >= subalign - 1)
1201 /* Set N2 unless subalign can never have any effect. */
1202 if (align > a.levels[0].maxskip + 1)
1204 a.levels[1].log = SUBALIGN_LOG;
1205 a.levels[1].normalize ();
1209 #endif
1211 /* Cache seen value. */
1212 cache.put (flag, a);
1216 /* Process -falign-foo=N[:M[:N2[:M2]]] options. */
1218 void
1219 parse_alignment_opts (void)
1221 parse_N_M (str_align_loops, align_loops);
1222 parse_N_M (str_align_jumps, align_jumps);
1223 parse_N_M (str_align_labels, align_labels);
1224 parse_N_M (str_align_functions, align_functions);
1227 /* Process the options that have been parsed. */
1228 static void
1229 process_options (bool no_backend)
1231 const char *language_string = lang_hooks.name;
1233 maximum_field_alignment = initial_max_fld_align * BITS_PER_UNIT;
1235 /* Some machines may reject certain combinations of options. */
1236 location_t saved_location = input_location;
1237 input_location = UNKNOWN_LOCATION;
1238 targetm.target_option.override ();
1239 input_location = saved_location;
1241 if (flag_diagnostics_generate_patch)
1242 global_dc->edit_context_ptr = new edit_context ();
1244 /* Avoid any informative notes in the second run of -fcompare-debug. */
1245 if (flag_compare_debug)
1246 diagnostic_inhibit_notes (global_dc);
1248 if (flag_section_anchors && !target_supports_section_anchors_p ())
1250 warning_at (UNKNOWN_LOCATION, OPT_fsection_anchors,
1251 "this target does not support %qs",
1252 "-fsection-anchors");
1253 flag_section_anchors = 0;
1256 if (flag_short_enums == 2)
1257 flag_short_enums = targetm.default_short_enums ();
1259 /* Set aux_base_name if not already set. */
1260 if (aux_base_name)
1262 else if (dump_base_name)
1264 const char *name = dump_base_name;
1265 int nlen, len;
1267 if (dump_base_ext && (len = strlen (dump_base_ext))
1268 && (nlen = strlen (name)) && nlen > len
1269 && strcmp (name + nlen - len, dump_base_ext) == 0)
1271 char *p = xstrndup (name, nlen - len);
1272 name = p;
1275 aux_base_name = name;
1277 else
1278 aux_base_name = "gccaux";
1280 #ifndef HAVE_isl
1281 if (flag_graphite
1282 || flag_loop_nest_optimize
1283 || flag_graphite_identity
1284 || flag_loop_parallelize_all)
1285 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1286 "(%<-fgraphite%>, %<-fgraphite-identity%>, "
1287 "%<-floop-nest-optimize%>, %<-floop-parallelize-all%>)");
1288 #endif
1290 if (flag_cf_protection != CF_NONE
1291 && !(flag_cf_protection & CF_SET))
1293 if (flag_cf_protection == CF_FULL)
1295 error_at (UNKNOWN_LOCATION,
1296 "%<-fcf-protection=full%> is not supported for this "
1297 "target");
1298 flag_cf_protection = CF_NONE;
1300 if (flag_cf_protection == CF_BRANCH)
1302 error_at (UNKNOWN_LOCATION,
1303 "%<-fcf-protection=branch%> is not supported for this "
1304 "target");
1305 flag_cf_protection = CF_NONE;
1307 if (flag_cf_protection == CF_RETURN)
1309 error_at (UNKNOWN_LOCATION,
1310 "%<-fcf-protection=return%> is not supported for this "
1311 "target");
1312 flag_cf_protection = CF_NONE;
1316 /* One region RA really helps to decrease the code size. */
1317 if (!OPTION_SET_P (flag_ira_region))
1318 flag_ira_region
1319 = optimize_size || !optimize ? IRA_REGION_ONE : IRA_REGION_MIXED;
1321 if (!abi_version_at_least (2))
1323 /* -fabi-version=1 support was removed after GCC 4.9. */
1324 error_at (UNKNOWN_LOCATION,
1325 "%<-fabi-version=1%> is no longer supported");
1326 flag_abi_version = 2;
1329 if (flag_non_call_exceptions)
1330 flag_asynchronous_unwind_tables = 1;
1331 if (flag_asynchronous_unwind_tables)
1332 flag_unwind_tables = 1;
1334 if (flag_value_profile_transformations)
1335 flag_profile_values = 1;
1337 /* Warn about options that are not supported on this machine. */
1338 #ifndef INSN_SCHEDULING
1339 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1340 warning_at (UNKNOWN_LOCATION, 0,
1341 "instruction scheduling not supported on this target machine");
1342 #endif
1343 if (!DELAY_SLOTS && flag_delayed_branch)
1344 warning_at (UNKNOWN_LOCATION, 0,
1345 "this target machine does not have delayed branches");
1347 user_label_prefix = USER_LABEL_PREFIX;
1348 if (flag_leading_underscore != -1)
1350 /* If the default prefix is more complicated than "" or "_",
1351 issue a warning and ignore this option. */
1352 if (user_label_prefix[0] == 0 ||
1353 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1355 user_label_prefix = flag_leading_underscore ? "_" : "";
1357 else
1358 warning_at (UNKNOWN_LOCATION, 0,
1359 "%<-f%sleading-underscore%> not supported on this "
1360 "target machine", flag_leading_underscore ? "" : "no-");
1363 /* If we are in verbose mode, write out the version and maybe all the
1364 option flags in use. */
1365 if (version_flag)
1367 print_version (stderr, "", true);
1368 if (!quiet_flag)
1370 fputs ("options passed: ", stderr);
1371 char *cmdline = gen_command_line_string (save_decoded_options,
1372 save_decoded_options_count);
1374 fputs (cmdline, stderr);
1375 free (cmdline);
1376 fputc ('\n', stderr);
1380 /* CTF is supported for only C at this time. */
1381 if (!lang_GNU_C ()
1382 && ctf_debug_info_level > CTFINFO_LEVEL_NONE)
1384 /* Compiling with -flto results in frontend language of GNU GIMPLE. It
1385 is not useful to warn in that case. */
1386 if (!startswith (lang_hooks.name, "GNU GIMPLE"))
1387 inform (UNKNOWN_LOCATION,
1388 "CTF debug info requested, but not supported for %qs frontend",
1389 language_string);
1390 ctf_debug_info_level = CTFINFO_LEVEL_NONE;
1393 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1395 FILE *final_output = fopen (flag_dump_final_insns, "w");
1396 if (!final_output)
1398 error_at (UNKNOWN_LOCATION,
1399 "could not open final insn dump file %qs: %m",
1400 flag_dump_final_insns);
1401 flag_dump_final_insns = NULL;
1403 else if (fclose (final_output))
1405 error_at (UNKNOWN_LOCATION,
1406 "could not close zeroed insn dump file %qs: %m",
1407 flag_dump_final_insns);
1408 flag_dump_final_insns = NULL;
1412 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1413 level is 0. */
1414 if (debug_info_level == DINFO_LEVEL_NONE
1415 && ctf_debug_info_level == CTFINFO_LEVEL_NONE)
1416 write_symbols = NO_DEBUG;
1418 /* Warn if STABS debug gets enabled and is not the default. */
1419 if (PREFERRED_DEBUGGING_TYPE != DBX_DEBUG && (write_symbols & DBX_DEBUG))
1420 warning (0, "STABS debugging information is obsolete and not "
1421 "supported anymore");
1423 if (write_symbols == NO_DEBUG)
1425 #if defined(DBX_DEBUGGING_INFO)
1426 else if (write_symbols == DBX_DEBUG)
1427 debug_hooks = &dbx_debug_hooks;
1428 #endif
1429 #if defined(XCOFF_DEBUGGING_INFO)
1430 else if (write_symbols == XCOFF_DEBUG)
1431 debug_hooks = &xcoff_debug_hooks;
1432 #endif
1433 #ifdef DWARF2_DEBUGGING_INFO
1434 else if (dwarf_debuginfo_p ())
1435 debug_hooks = &dwarf2_debug_hooks;
1436 #endif
1437 #ifdef CTF_DEBUGGING_INFO
1438 else if (ctf_debuginfo_p ())
1439 debug_hooks = &dwarf2_debug_hooks;
1440 #endif
1441 #ifdef BTF_DEBUGGING_INFO
1442 else if (btf_debuginfo_p ())
1443 debug_hooks = &dwarf2_debug_hooks;
1444 #endif
1445 #ifdef VMS_DEBUGGING_INFO
1446 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1447 debug_hooks = &vmsdbg_debug_hooks;
1448 #endif
1449 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1450 else if (write_symbols == DWARF2_DEBUG)
1451 debug_hooks = &dwarf2_lineno_debug_hooks;
1452 #endif
1453 else
1455 gcc_assert (debug_set_count (write_symbols) <= 1);
1456 error_at (UNKNOWN_LOCATION,
1457 "target system does not support the %qs debug format",
1458 debug_type_names[debug_set_to_format (write_symbols)]);
1461 /* We know which debug output will be used so we can set flag_var_tracking
1462 and flag_var_tracking_uninit if the user has not specified them. */
1463 if (debug_info_level < DINFO_LEVEL_NORMAL
1464 || !dwarf_debuginfo_p ()
1465 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1467 if ((OPTION_SET_P (flag_var_tracking) && flag_var_tracking == 1)
1468 || (OPTION_SET_P (flag_var_tracking_uninit)
1469 && flag_var_tracking_uninit == 1))
1471 if (debug_info_level < DINFO_LEVEL_NORMAL)
1472 warning_at (UNKNOWN_LOCATION, 0,
1473 "variable tracking requested, but useless unless "
1474 "producing debug info");
1475 else
1476 warning_at (UNKNOWN_LOCATION, 0,
1477 "variable tracking requested, but not supported "
1478 "by this debug format");
1480 flag_var_tracking = 0;
1481 flag_var_tracking_uninit = 0;
1482 flag_var_tracking_assignments = 0;
1485 /* The debug hooks are used to implement -fdump-go-spec because it
1486 gives a simple and stable API for all the information we need to
1487 dump. */
1488 if (flag_dump_go_spec != NULL)
1489 debug_hooks = dump_go_spec_init (flag_dump_go_spec, debug_hooks);
1491 if (!OPTION_SET_P (dwarf2out_as_loc_support))
1492 dwarf2out_as_loc_support = dwarf2out_default_as_loc_support ();
1493 if (!OPTION_SET_P (dwarf2out_as_locview_support))
1494 dwarf2out_as_locview_support = dwarf2out_default_as_locview_support ();
1496 if (!OPTION_SET_P (debug_variable_location_views))
1498 debug_variable_location_views
1499 = (flag_var_tracking
1500 && debug_info_level >= DINFO_LEVEL_NORMAL
1501 && dwarf_debuginfo_p ()
1502 && !dwarf_strict
1503 && dwarf2out_as_loc_support
1504 && dwarf2out_as_locview_support);
1506 else if (debug_variable_location_views == -1 && dwarf_version != 5)
1508 warning_at (UNKNOWN_LOCATION, 0,
1509 "without %<-gdwarf-5%>, "
1510 "%<-gvariable-location-views=incompat5%> "
1511 "is equivalent to %<-gvariable-location-views%>");
1512 debug_variable_location_views = 1;
1515 if (debug_internal_reset_location_views == 2)
1517 debug_internal_reset_location_views
1518 = (debug_variable_location_views
1519 && targetm.reset_location_view);
1521 else if (debug_internal_reset_location_views
1522 && !debug_variable_location_views)
1524 warning_at (UNKNOWN_LOCATION, 0,
1525 "%<-ginternal-reset-location-views%> is forced disabled "
1526 "without %<-gvariable-location-views%>");
1527 debug_internal_reset_location_views = 0;
1530 if (!OPTION_SET_P (debug_inline_points))
1531 debug_inline_points = debug_variable_location_views;
1532 else if (debug_inline_points && !debug_nonbind_markers_p)
1534 warning_at (UNKNOWN_LOCATION, 0,
1535 "%<-ginline-points%> is forced disabled without "
1536 "%<-gstatement-frontiers%>");
1537 debug_inline_points = 0;
1540 if (!OPTION_SET_P (flag_tree_cselim))
1542 if (HAVE_conditional_move)
1543 flag_tree_cselim = 1;
1544 else
1545 flag_tree_cselim = 0;
1548 /* If auxiliary info generation is desired, open the output file.
1549 This goes in the same directory as the source file--unlike
1550 all the other output files. */
1551 if (flag_gen_aux_info)
1553 aux_info_file = fopen (aux_info_file_name, "w");
1554 if (aux_info_file == 0)
1555 fatal_error (UNKNOWN_LOCATION,
1556 "cannot open %s: %m", aux_info_file_name);
1559 if (!targetm_common.have_named_sections)
1561 if (flag_function_sections)
1563 warning_at (UNKNOWN_LOCATION, 0,
1564 "%<-ffunction-sections%> not supported for this target");
1565 flag_function_sections = 0;
1567 if (flag_data_sections)
1569 warning_at (UNKNOWN_LOCATION, 0,
1570 "%<-fdata-sections%> not supported for this target");
1571 flag_data_sections = 0;
1575 if (flag_prefetch_loop_arrays > 0 && !targetm.code_for_prefetch)
1577 warning_at (UNKNOWN_LOCATION, 0,
1578 "%<-fprefetch-loop-arrays%> not supported for this target");
1579 flag_prefetch_loop_arrays = 0;
1581 else if (flag_prefetch_loop_arrays > 0 && !targetm.have_prefetch ())
1583 warning_at (UNKNOWN_LOCATION, 0,
1584 "%<-fprefetch-loop-arrays%> not supported for this target "
1585 "(try %<-march%> switches)");
1586 flag_prefetch_loop_arrays = 0;
1589 /* This combination of options isn't handled for i386 targets and doesn't
1590 make much sense anyway, so don't allow it. */
1591 if (flag_prefetch_loop_arrays > 0 && optimize_size)
1593 warning_at (UNKNOWN_LOCATION, 0,
1594 "%<-fprefetch-loop-arrays%> is not supported with %<-Os%>");
1595 flag_prefetch_loop_arrays = 0;
1598 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1599 if (flag_signaling_nans)
1600 flag_trapping_math = 1;
1602 /* We cannot reassociate if we want traps or signed zeros. */
1603 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1605 warning_at (UNKNOWN_LOCATION, 0,
1606 "%<-fassociative-math%> disabled; other options take "
1607 "precedence");
1608 flag_associative_math = 0;
1611 /* -fstack-clash-protection is not currently supported on targets
1612 where the stack grows up. */
1613 if (flag_stack_clash_protection && !STACK_GROWS_DOWNWARD)
1615 warning_at (UNKNOWN_LOCATION, 0,
1616 "%<-fstack-clash-protection%> is not supported on targets "
1617 "where the stack grows from lower to higher addresses");
1618 flag_stack_clash_protection = 0;
1621 /* We cannot support -fstack-check= and -fstack-clash-protection at
1622 the same time. */
1623 if (flag_stack_check != NO_STACK_CHECK && flag_stack_clash_protection)
1625 warning_at (UNKNOWN_LOCATION, 0,
1626 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1627 "mutually exclusive; disabling %<-fstack-check=%>");
1628 flag_stack_check = NO_STACK_CHECK;
1631 /* Targets must be able to place spill slots at lower addresses. If the
1632 target already uses a soft frame pointer, the transition is trivial. */
1633 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1635 warning_at (UNKNOWN_LOCATION, 0,
1636 "%<-fstack-protector%> not supported for this target");
1637 flag_stack_protect = 0;
1639 if (!flag_stack_protect)
1640 warn_stack_protect = 0;
1642 /* Address Sanitizer needs porting to each target architecture. */
1644 if ((flag_sanitize & SANITIZE_ADDRESS)
1645 && !FRAME_GROWS_DOWNWARD)
1647 warning_at (UNKNOWN_LOCATION, 0,
1648 "%<-fsanitize=address%> and %<-fsanitize=kernel-address%> "
1649 "are not supported for this target");
1650 flag_sanitize &= ~SANITIZE_ADDRESS;
1653 if ((flag_sanitize & SANITIZE_USER_ADDRESS)
1654 && ((targetm.asan_shadow_offset == NULL)
1655 || (targetm.asan_shadow_offset () == 0)))
1657 warning_at (UNKNOWN_LOCATION, 0,
1658 "%<-fsanitize=address%> not supported for this target");
1659 flag_sanitize &= ~SANITIZE_ADDRESS;
1662 if ((flag_sanitize & SANITIZE_KERNEL_ADDRESS)
1663 && (targetm.asan_shadow_offset == NULL
1664 && !asan_shadow_offset_set_p ()))
1666 warning_at (UNKNOWN_LOCATION, 0,
1667 "%<-fsanitize=kernel-address%> with stack protection "
1668 "is not supported without %<-fasan-shadow-offset=%> "
1669 "for this target");
1670 flag_sanitize &= ~SANITIZE_ADDRESS;
1673 /* HWAsan requires top byte ignore feature in the backend. */
1674 if (flag_sanitize & SANITIZE_HWADDRESS
1675 && ! targetm.memtag.can_tag_addresses ())
1677 warning_at (UNKNOWN_LOCATION, 0, "%qs is not supported for this target",
1678 "-fsanitize=hwaddress");
1679 flag_sanitize &= ~SANITIZE_HWADDRESS;
1682 if (flag_sanitize & SANITIZE_SHADOW_CALL_STACK)
1684 if (!targetm.have_shadow_call_stack)
1685 sorry ("%<-fsanitize=shadow-call-stack%> not supported "
1686 "in current platform");
1687 else if (flag_exceptions)
1688 error_at (UNKNOWN_LOCATION, "%<-fsanitize=shadow-call-stack%> "
1689 "requires %<-fno-exceptions%>");
1692 HOST_WIDE_INT patch_area_size, patch_area_start;
1693 parse_and_check_patch_area (flag_patchable_function_entry, false,
1694 &patch_area_size, &patch_area_start);
1696 /* Do not use IPA optimizations for register allocation if profiler is active
1697 or patchable function entries are inserted for run-time instrumentation
1698 or port does not emit prologue and epilogue as RTL. */
1699 if (profile_flag || patch_area_size
1700 || !targetm.have_prologue () || !targetm.have_epilogue ())
1701 flag_ipa_ra = 0;
1703 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1704 have not been set. */
1705 if (!OPTION_SET_P (warnings_are_errors))
1707 if (warn_coverage_mismatch
1708 && (global_dc->classify_diagnostic[OPT_Wcoverage_mismatch] ==
1709 DK_UNSPECIFIED))
1710 diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_mismatch,
1711 DK_ERROR, UNKNOWN_LOCATION);
1712 if (warn_coverage_invalid_linenum
1713 && (global_dc->classify_diagnostic[OPT_Wcoverage_invalid_line_number] ==
1714 DK_UNSPECIFIED))
1715 diagnostic_classify_diagnostic (global_dc, OPT_Wcoverage_invalid_line_number,
1716 DK_ERROR, UNKNOWN_LOCATION);
1719 /* Save the current optimization options. */
1720 optimization_default_node
1721 = build_optimization_node (&global_options, &global_options_set);
1722 optimization_current_node = optimization_default_node;
1724 if (flag_checking >= 2)
1725 hash_table_sanitize_eq_limit
1726 = param_hash_table_verification_limit;
1728 if (flag_large_source_files)
1729 line_table->default_range_bits = 0;
1731 diagnose_options (&global_options, &global_options_set, UNKNOWN_LOCATION);
1733 /* Please don't change global_options after this point, those changes won't
1734 be reflected in optimization_{default,current}_node. */
1737 /* This function can be called multiple times to reinitialize the compiler
1738 back end when register classes or instruction sets have changed,
1739 before each function. */
1740 static void
1741 backend_init_target (void)
1743 /* This depends on stack_pointer_rtx. */
1744 init_fake_stack_mems ();
1746 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1747 mode-dependent. */
1748 init_alias_target ();
1750 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1751 if (!ira_use_lra_p)
1752 init_reload ();
1754 /* Depends on the enabled attribute. */
1755 recog_init ();
1757 /* The following initialization functions need to generate rtl, so
1758 provide a dummy function context for them. */
1759 init_dummy_function_start ();
1761 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1762 on a mode change. */
1763 init_expmed ();
1764 init_lower_subreg ();
1765 init_set_costs ();
1767 init_expr_target ();
1768 ira_init ();
1770 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1771 after a mode change as well. */
1772 caller_save_initialized_p = false;
1774 expand_dummy_function_end ();
1777 /* Initialize the compiler back end. This function is called only once,
1778 when starting the compiler. */
1779 static void
1780 backend_init (void)
1782 init_emit_once ();
1784 init_rtlanal ();
1785 init_inline_once ();
1786 init_varasm_once ();
1787 save_register_info ();
1789 /* Middle end needs this initialization for default mem attributes
1790 used by early calls to make_decl_rtl. */
1791 init_emit_regs ();
1793 /* Middle end needs this initialization for mode tables used to assign
1794 modes to vector variables. */
1795 init_regs ();
1798 /* Initialize things that are both lang-dependent and target-dependent.
1799 This function can be called more than once if target parameters change. */
1800 static void
1801 lang_dependent_init_target (void)
1803 /* This creates various _DECL nodes, so needs to be called after the
1804 front end is initialized. It also depends on the HAVE_xxx macros
1805 generated from the target machine description. */
1806 init_optabs ();
1808 gcc_assert (!this_target_rtl->target_specific_initialized);
1811 /* Perform initializations that are lang-dependent or target-dependent.
1812 but matters only for late optimizations and RTL generation. */
1814 static int rtl_initialized;
1816 void
1817 initialize_rtl (void)
1819 auto_timevar tv (g_timer, TV_INITIALIZE_RTL);
1821 /* Initialization done just once per compilation, but delayed
1822 till code generation. */
1823 if (!rtl_initialized)
1824 ira_init_once ();
1825 rtl_initialized = true;
1827 /* Target specific RTL backend initialization. */
1828 if (!this_target_rtl->target_specific_initialized)
1830 backend_init_target ();
1831 this_target_rtl->target_specific_initialized = true;
1835 /* Language-dependent initialization. Returns nonzero on success. */
1836 static int
1837 lang_dependent_init (const char *name)
1839 location_t save_loc = input_location;
1840 if (!dump_base_name)
1842 dump_base_name = name && name[0] ? name : "gccdump";
1844 /* We do not want to derive a non-empty dumpbase-ext from an
1845 explicit -dumpbase argument, only from a defaulted
1846 dumpbase. */
1847 if (!dump_base_ext)
1849 const char *base = lbasename (dump_base_name);
1850 const char *ext = strrchr (base, '.');
1851 if (ext)
1852 dump_base_ext = ext;
1856 /* Other front-end initialization. */
1857 input_location = BUILTINS_LOCATION;
1858 if (lang_hooks.init () == 0)
1859 return 0;
1860 input_location = save_loc;
1862 if (!flag_wpa)
1864 init_asm_output (name);
1866 if (!flag_generate_lto && !flag_compare_debug)
1868 /* If stack usage information is desired, open the output file. */
1869 if (flag_stack_usage)
1870 stack_usage_file = open_auxiliary_file ("su");
1872 /* If call graph information is desired, open the output file. */
1873 if (flag_callgraph_info)
1875 callgraph_info_file = open_auxiliary_file ("ci");
1876 /* Write the file header. */
1877 fprintf (callgraph_info_file,
1878 "graph: { title: \"%s\"\n", main_input_filename);
1879 bitmap_obstack_initialize (NULL);
1880 callgraph_info_external_printed = BITMAP_ALLOC (NULL);
1883 else
1884 flag_stack_usage = flag_callgraph_info = false;
1887 /* This creates various _DECL nodes, so needs to be called after the
1888 front end is initialized. */
1889 init_eh ();
1891 /* Do the target-specific parts of the initialization. */
1892 lang_dependent_init_target ();
1894 if (!flag_wpa)
1896 /* If dbx symbol table desired, initialize writing it and output the
1897 predefined types. */
1898 timevar_push (TV_SYMOUT);
1900 /* Now we have the correct original filename, we can initialize
1901 debug output. */
1902 (*debug_hooks->init) (name);
1904 timevar_pop (TV_SYMOUT);
1907 return 1;
1911 /* Reinitialize everything when target parameters, such as register usage,
1912 have changed. */
1913 void
1914 target_reinit (void)
1916 struct rtl_data saved_x_rtl;
1917 rtx *saved_regno_reg_rtx;
1918 tree saved_optimization_current_node;
1919 struct target_optabs *saved_this_fn_optabs;
1921 /* Temporarily switch to the default optimization node, so that
1922 *this_target_optabs is set to the default, not reflecting
1923 whatever a previous function used for the optimize
1924 attribute. */
1925 saved_optimization_current_node = optimization_current_node;
1926 saved_this_fn_optabs = this_fn_optabs;
1927 if (saved_optimization_current_node != optimization_default_node)
1929 optimization_current_node = optimization_default_node;
1930 cl_optimization_restore
1931 (&global_options, &global_options_set,
1932 TREE_OPTIMIZATION (optimization_default_node));
1934 this_fn_optabs = this_target_optabs;
1936 /* Save *crtl and regno_reg_rtx around the reinitialization
1937 to allow target_reinit being called even after prepare_function_start. */
1938 saved_regno_reg_rtx = regno_reg_rtx;
1939 if (saved_regno_reg_rtx)
1941 saved_x_rtl = *crtl;
1942 memset (crtl, '\0', sizeof (*crtl));
1943 regno_reg_rtx = NULL;
1946 this_target_rtl->target_specific_initialized = false;
1948 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1949 to initialize reg_raw_mode[]. */
1950 init_emit_regs ();
1952 /* This invokes target hooks to set fixed_reg[] etc, which is
1953 mode-dependent. */
1954 init_regs ();
1956 /* Reinitialize lang-dependent parts. */
1957 lang_dependent_init_target ();
1959 /* Restore the original optimization node. */
1960 if (saved_optimization_current_node != optimization_default_node)
1962 optimization_current_node = saved_optimization_current_node;
1963 cl_optimization_restore (&global_options, &global_options_set,
1964 TREE_OPTIMIZATION (optimization_current_node));
1966 this_fn_optabs = saved_this_fn_optabs;
1968 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1969 expand_dummy_function_end clears it. */
1970 if (saved_regno_reg_rtx)
1972 *crtl = saved_x_rtl;
1973 regno_reg_rtx = saved_regno_reg_rtx;
1974 saved_regno_reg_rtx = NULL;
1978 void
1979 dump_memory_report (const char *header)
1981 /* Print significant header. */
1982 fputc ('\n', stderr);
1983 for (unsigned i = 0; i < 80; i++)
1984 fputc ('#', stderr);
1985 fprintf (stderr, "\n# %-77s#\n", header);
1986 for (unsigned i = 0; i < 80; i++)
1987 fputc ('#', stderr);
1988 fputs ("\n\n", stderr);
1990 dump_line_table_statistics ();
1991 ggc_print_statistics ();
1992 stringpool_statistics ();
1993 dump_tree_statistics ();
1994 dump_gimple_statistics ();
1995 dump_rtx_statistics ();
1996 dump_alloc_pool_statistics ();
1997 dump_bitmap_statistics ();
1998 dump_hash_table_loc_statistics ();
1999 dump_vec_loc_statistics ();
2000 dump_ggc_loc_statistics ();
2001 dump_alias_stats (stderr);
2002 dump_pta_stats (stderr);
2005 /* Clean up: close opened files, etc. */
2007 static void
2008 finalize (bool no_backend)
2010 /* Close the dump files. */
2011 if (flag_gen_aux_info)
2013 fclose (aux_info_file);
2014 aux_info_file = NULL;
2015 if (seen_error ())
2016 unlink (aux_info_file_name);
2019 /* Close non-debugging input and output files. Take special care to note
2020 whether fclose returns an error, since the pages might still be on the
2021 buffer chain while the file is open. */
2023 if (asm_out_file)
2025 if (ferror (asm_out_file) != 0)
2026 fatal_error (input_location, "error writing to %s: %m", asm_file_name);
2027 if (fclose (asm_out_file) != 0)
2028 fatal_error (input_location, "error closing %s: %m", asm_file_name);
2029 asm_out_file = NULL;
2032 if (stack_usage_file)
2034 fclose (stack_usage_file);
2035 stack_usage_file = NULL;
2038 if (callgraph_info_file)
2040 fputs ("}\n", callgraph_info_file);
2041 fclose (callgraph_info_file);
2042 callgraph_info_file = NULL;
2043 BITMAP_FREE (callgraph_info_external_printed);
2044 bitmap_obstack_release (NULL);
2047 if (seen_error ())
2048 coverage_remove_note_file ();
2050 if (!no_backend)
2052 statistics_fini ();
2053 debuginfo_fini ();
2055 g->get_passes ()->finish_optimization_passes ();
2057 lra_finish_once ();
2060 if (mem_report)
2061 dump_memory_report ("Final");
2063 if (profile_report)
2064 dump_profile_report ();
2066 if (flag_dbg_cnt_list)
2067 dbg_cnt_list_all_counters ();
2069 /* Language-specific end of compilation actions. */
2070 lang_hooks.finish ();
2073 static bool
2074 standard_type_bitsize (int bitsize)
2076 /* As a special exception, we always want __int128 enabled if possible. */
2077 if (bitsize == 128)
2078 return false;
2079 if (bitsize == CHAR_TYPE_SIZE
2080 || bitsize == SHORT_TYPE_SIZE
2081 || bitsize == INT_TYPE_SIZE
2082 || bitsize == LONG_TYPE_SIZE
2083 || bitsize == LONG_LONG_TYPE_SIZE)
2084 return true;
2085 return false;
2088 /* Initialize the compiler, and compile the input file. */
2089 static void
2090 do_compile (bool no_backend)
2092 /* Don't do any more if an error has already occurred. */
2093 if (!seen_error ())
2095 int i;
2097 timevar_start (TV_PHASE_SETUP);
2099 if (flag_save_optimization_record)
2101 dump_context::get ().set_json_writer (new optrecord_json_writer ());
2104 /* This must be run always, because it is needed to compute the FP
2105 predefined macros, such as __LDBL_MAX__, for targets using non
2106 default FP formats. */
2107 init_adjust_machine_modes ();
2108 init_derived_machine_modes ();
2110 /* This must happen after the backend has a chance to process
2111 command line options, but before the parsers are
2112 initialized. */
2113 for (i = 0; i < NUM_INT_N_ENTS; i ++)
2114 if (targetm.scalar_mode_supported_p (int_n_data[i].m)
2115 && ! standard_type_bitsize (int_n_data[i].bitsize))
2116 int_n_enabled_p[i] = true;
2117 else
2118 int_n_enabled_p[i] = false;
2120 /* Initialize mpfrs exponent range. This is important to get
2121 underflow/overflow in a reasonable timeframe. */
2122 machine_mode mode;
2123 int min_exp = -1;
2124 int max_exp = 1;
2125 FOR_EACH_MODE_IN_CLASS (mode, MODE_FLOAT)
2126 if (SCALAR_FLOAT_MODE_P (mode))
2128 const real_format *fmt = REAL_MODE_FORMAT (mode);
2129 if (fmt)
2131 /* fmt->emin - fmt->p + 1 should be enough but the
2132 back-and-forth dance in real_to_decimal_for_mode we
2133 do for checking fails due to rounding effects then. */
2134 if ((fmt->emin - fmt->p) < min_exp)
2135 min_exp = fmt->emin - fmt->p;
2136 if (fmt->emax > max_exp)
2137 max_exp = fmt->emax;
2140 /* E.g. mpc_norm assumes it can square a number without bothering with
2141 with range scaling, so until that is fixed, double the minimum
2142 and maximum exponents, plus add some buffer for arithmetics
2143 on the squared numbers. */
2144 if (mpfr_set_emin (2 * (min_exp - 1))
2145 || mpfr_set_emax (2 * (max_exp + 1)))
2146 sorry ("mpfr not configured to handle all floating modes");
2148 /* Set up the back-end if requested. */
2149 if (!no_backend)
2150 backend_init ();
2152 /* Language-dependent initialization. Returns true on success. */
2153 if (lang_dependent_init (main_input_filename))
2155 /* Initialize yet another pass. */
2157 ggc_protect_identifiers = true;
2159 symtab->initialize ();
2160 init_final (main_input_filename);
2161 coverage_init (aux_base_name);
2162 statistics_init ();
2163 debuginfo_init ();
2164 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
2166 timevar_stop (TV_PHASE_SETUP);
2168 compile_file ();
2170 else
2172 timevar_stop (TV_PHASE_SETUP);
2175 timevar_start (TV_PHASE_FINALIZE);
2177 finalize (no_backend);
2179 timevar_stop (TV_PHASE_FINALIZE);
2183 toplev::toplev (timer *external_timer,
2184 bool init_signals)
2185 : m_use_TV_TOTAL (external_timer == NULL),
2186 m_init_signals (init_signals)
2188 if (external_timer)
2189 g_timer = external_timer;
2192 toplev::~toplev ()
2194 if (g_timer && m_use_TV_TOTAL)
2196 g_timer->stop (TV_TOTAL);
2197 g_timer->print (stderr);
2198 delete g_timer;
2199 g_timer = NULL;
2203 /* Potentially call timevar_init (which will create g_timevars if it
2204 doesn't already exist). */
2206 void
2207 toplev::start_timevars ()
2209 if (time_report || !quiet_flag || flag_detailed_statistics)
2210 timevar_init ();
2212 timevar_start (TV_TOTAL);
2215 /* Handle -fself-test. */
2217 void
2218 toplev::run_self_tests ()
2220 #if CHECKING_P
2221 /* Reset some state. */
2222 input_location = UNKNOWN_LOCATION;
2223 bitmap_obstack_initialize (NULL);
2225 /* Run the tests; any failures will lead to an abort of the process.
2226 Use "make selftests-gdb" to run under the debugger. */
2227 ::selftest::run_tests ();
2229 /* Cleanup. */
2230 bitmap_obstack_release (NULL);
2231 #else
2232 inform (UNKNOWN_LOCATION, "self-tests are not enabled in this build");
2233 #endif /* #if CHECKING_P */
2236 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2237 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2238 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2240 It is not safe to call this function more than once. */
2243 toplev::main (int argc, char **argv)
2245 /* Parsing and gimplification sometimes need quite large stack.
2246 Increase stack size limits if possible. */
2247 stack_limit_increase (64 * 1024 * 1024);
2249 expandargv (&argc, &argv);
2251 /* Initialization of GCC's environment, and diagnostics. */
2252 general_init (argv[0], m_init_signals);
2254 /* One-off initialization of options that does not need to be
2255 repeated when options are added for particular functions. */
2256 init_options_once ();
2257 init_opts_obstack ();
2259 /* Initialize global options structures; this must be repeated for
2260 each structure used for parsing options. */
2261 init_options_struct (&global_options, &global_options_set);
2262 lang_hooks.init_options_struct (&global_options);
2264 /* Init GGC heuristics must be caller after we initialize
2265 options. */
2266 init_ggc_heuristics ();
2268 /* Convert the options to an array. */
2269 decode_cmdline_options_to_array_default_mask (argc,
2270 CONST_CAST2 (const char **,
2271 char **, argv),
2272 &save_decoded_options,
2273 &save_decoded_options_count);
2275 /* Save Optimization decoded options. */
2276 save_opt_decoded_options = new vec<cl_decoded_option> ();
2277 for (unsigned i = 1; i < save_decoded_options_count; ++i)
2278 if (save_decoded_options[i].opt_index < cl_options_count
2279 && cl_options[save_decoded_options[i].opt_index].flags & CL_OPTIMIZATION)
2280 save_opt_decoded_options->safe_push (save_decoded_options[i]);
2282 /* Perform language-specific options initialization. */
2283 lang_hooks.init_options (save_decoded_options_count, save_decoded_options);
2285 /* Parse the options and do minimal processing; basically just
2286 enough to default flags appropriately. */
2287 decode_options (&global_options, &global_options_set,
2288 save_decoded_options, save_decoded_options_count,
2289 UNKNOWN_LOCATION, global_dc,
2290 targetm.target_option.override);
2292 handle_common_deferred_options ();
2294 init_local_tick ();
2296 initialize_plugins ();
2298 if (version_flag)
2299 print_version (stderr, "", true);
2301 if (help_flag)
2302 print_plugins_help (stderr, "");
2304 /* Exit early if we can (e.g. -help). */
2305 if (!exit_after_options)
2307 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
2308 This can happen with incorrect pre-processed input. */
2309 debug_hooks = &do_nothing_debug_hooks;
2310 /* Allow the front end to perform consistency checks and do further
2311 initialization based on the command line options. This hook also
2312 sets the original filename if appropriate (e.g. foo.i -> foo.c)
2313 so we can correctly initialize debug output. */
2314 bool no_backend = lang_hooks.post_options (&main_input_filename);
2316 process_options (no_backend);
2318 if (m_use_TV_TOTAL)
2319 start_timevars ();
2320 do_compile (no_backend);
2322 if (flag_self_test)
2324 if (no_backend)
2325 error_at (UNKNOWN_LOCATION, "self-tests incompatible with %<-E%>");
2326 else
2327 run_self_tests ();
2331 if (warningcount || errorcount || werrorcount)
2332 print_ignored_options ();
2334 /* Invoke registered plugin callbacks if any. Some plugins could
2335 emit some diagnostics here. */
2336 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2338 if (flag_diagnostics_generate_patch)
2340 gcc_assert (global_dc->edit_context_ptr);
2342 pretty_printer pp;
2343 pp_show_color (&pp) = pp_show_color (global_dc->printer);
2344 global_dc->edit_context_ptr->print_diff (&pp, true);
2345 pp_flush (&pp);
2348 diagnostic_finish (global_dc);
2350 finalize_plugins ();
2352 after_memory_report = true;
2354 if (seen_error () || werrorcount)
2355 return (FATAL_EXIT_CODE);
2357 return (SUCCESS_EXIT_CODE);
2360 /* For those that want to, this function aims to clean up enough state that
2361 you can call toplev::main again. */
2362 void
2363 toplev::finalize (void)
2365 rtl_initialized = false;
2366 this_target_rtl->target_specific_initialized = false;
2368 /* Needs to be called before cgraph_cc_finalize since it uses symtab. */
2369 ipa_reference_cc_finalize ();
2370 ipa_fnsummary_cc_finalize ();
2371 ipa_modref_cc_finalize ();
2372 ipa_edge_modifications_finalize ();
2374 cgraph_cc_finalize ();
2375 cgraphunit_cc_finalize ();
2376 symtab_thunks_cc_finalize ();
2377 dwarf2out_cc_finalize ();
2378 gcse_cc_finalize ();
2379 ipa_cp_cc_finalize ();
2380 ira_costs_cc_finalize ();
2381 tree_cc_finalize ();
2382 reginfo_cc_finalize ();
2384 /* save_decoded_options uses opts_obstack, so these must
2385 be cleaned up together. */
2386 obstack_free (&opts_obstack, NULL);
2387 XDELETEVEC (save_decoded_options);
2388 save_decoded_options = NULL;
2389 save_decoded_options_count = 0;
2391 /* Clean up the context (and pass_manager etc). */
2392 delete g;
2393 g = NULL;