1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2020 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
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
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. */
27 #include "coretypes.h"
33 #include "alloc-pool.h"
37 #include "optabs-libfuncs.h"
38 #include "insn-config.h"
43 #include "diagnostic.h"
45 #include "tree-inline.h"
46 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
49 #include "insn-attr.h"
54 #include "tree-diagnostic.h"
57 #include "dwarf2asm.h"
59 #include "common/common-target.h"
60 #include "langhooks.h"
61 #include "cfgloop.h" /* for init_set_costs */
62 #include "hosthooks.h"
64 #include "opts-diagnostic.h"
65 #include "stringpool.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"
79 #include "omp-offload.h"
80 #include "edit-context.h"
81 #include "tree-pass.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"
90 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
94 #ifdef XCOFF_DEBUGGING_INFO
95 #include "xcoffout.h" /* Needed for external data declarations. */
101 #include <isl/version.h>
104 static void general_init (const char *, bool);
105 static void do_compile ();
106 static void process_options (void);
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 /* True if we don't need a backend (e.g. preprocessing only). */
116 static bool no_backend
;
118 /* Length of line when printing switch values. */
121 /* Decoded options, and number of such options. */
122 struct cl_decoded_option
*save_decoded_options
;
123 unsigned int save_decoded_options_count
;
125 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
126 to optimize in process_options (). */
127 #define AUTODETECT_VALUE 2
129 /* Debug hooks - dependent upon command line options. */
131 const struct gcc_debug_hooks
*debug_hooks
;
133 /* The FUNCTION_DECL for the function currently being compiled,
134 or 0 if between functions. */
135 tree current_function_decl
;
137 /* Set to the FUNC_BEGIN label of the current function, or NULL
139 const char * current_function_func_begin_label
;
141 /* A random sequence of characters, unless overridden by user. */
142 static const char *flag_random_seed
;
144 /* A local time stamp derived from the time of compilation. It will be
145 zero if the system cannot provide a time. It will be -1u, if the
146 user has specified a particular random seed. */
149 /* Random number for this compilation */
150 HOST_WIDE_INT random_seed
;
154 /* When non-NULL, indicates that whenever space is allocated on the
155 stack, the resulting stack pointer must not pass this
156 address---that is, for stacks that grow downward, the stack pointer
157 must always be greater than or equal to this address; for stacks
158 that grow upward, the stack pointer must be less than this address.
159 At present, the rtx may be either a REG or a SYMBOL_REF, although
160 the support provided depends on the backend. */
163 class target_flag_state default_target_flag_state
;
164 #if SWITCHABLE_TARGET
165 class target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
167 #define this_target_flag_state (&default_target_flag_state)
170 /* The user symbol prefix after having resolved same. */
171 const char *user_label_prefix
;
173 /* Output files for assembler code (real compiler output)
174 and debugging dumps. */
178 FILE *callgraph_info_file
= NULL
;
179 static bitmap callgraph_info_external_printed
;
180 FILE *stack_usage_file
= NULL
;
182 /* The current working directory of a translation. It's generally the
183 directory from which compilation was initiated, but a preprocessed
184 file may specify the original directory in which it was
187 static const char *src_pwd
;
189 /* Initialize src_pwd with the given string, and return true. If it
190 was already initialized, return false. As a special case, it may
191 be called with a NULL argument to test whether src_pwd has NOT been
195 set_src_pwd (const char *pwd
)
199 if (strcmp (src_pwd
, pwd
) == 0)
205 src_pwd
= xstrdup (pwd
);
209 /* Return the directory from which the translation unit was initiated,
210 in case set_src_pwd() was not called before to assign it a
226 /* Called when the start of a function definition is parsed,
227 this function prints on stderr the name of the function. */
229 announce_function (tree decl
)
233 if (rtl_dump_and_exit
)
234 fprintf (stderr
, "%s ",
235 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
237 fprintf (stderr
, " %s",
238 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
240 pp_needs_newline (global_dc
->printer
) = true;
241 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
245 /* Initialize local_tick with the time of day, or -1 if
246 flag_random_seed is set. */
249 init_local_tick (void)
251 if (!flag_random_seed
)
253 #ifdef HAVE_GETTIMEOFDAY
257 gettimeofday (&tv
, NULL
);
258 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
262 time_t now
= time (NULL
);
264 if (now
!= (time_t)-1)
265 local_tick
= (unsigned) now
;
273 /* Obtain the random_seed. Unless NOINIT, initialize it if
274 it's not provided in the command line. */
277 get_random_seed (bool noinit
)
279 if (!random_seed
&& !noinit
)
281 int fd
= open ("/dev/urandom", O_RDONLY
);
284 if (read (fd
, &random_seed
, sizeof (random_seed
))
285 != sizeof (random_seed
))
290 random_seed
= local_tick
^ getpid ();
295 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */
298 set_random_seed (const char *val
)
300 flag_random_seed
= val
;
301 if (flag_random_seed
)
305 /* When the driver passed in a hex number don't crc it again */
306 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
307 if (!(endp
> flag_random_seed
&& *endp
== 0))
308 random_seed
= crc32_string (0, flag_random_seed
);
312 /* Handler for fatal signals, such as SIGSEGV. These are transformed
313 into ICE messages, which is much more user friendly. In case the
314 error printer crashes, reset the signal to prevent infinite recursion. */
317 crash_signal (int signo
)
319 signal (signo
, SIG_DFL
);
321 /* If we crashed while processing an ASM statement, then be a little more
322 graceful. It's most likely the user's fault. */
323 if (this_is_asm_operands
)
325 output_operand_lossage ("unrecoverable error");
326 exit (FATAL_EXIT_CODE
);
329 internal_error ("%s", strsignal (signo
));
332 /* A subroutine of wrapup_global_declarations. We've come to the end of
333 the compilation unit. All deferred variables should be undeferred,
334 and all incomplete decls should be finalized. */
337 wrapup_global_declaration_1 (tree decl
)
339 /* We're not deferring this any longer. Assignment is conditional to
340 avoid needlessly dirtying PCH pages. */
341 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
342 && DECL_DEFER_OUTPUT (decl
) != 0)
343 DECL_DEFER_OUTPUT (decl
) = 0;
345 if (VAR_P (decl
) && DECL_SIZE (decl
) == 0)
346 lang_hooks
.finish_incomplete_decl (decl
);
349 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
350 needs to be output. Return true if it is output. */
353 wrapup_global_declaration_2 (tree decl
)
355 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
356 || (VAR_P (decl
) && DECL_HAS_VALUE_EXPR_P (decl
)))
359 /* Don't write out static consts, unless we still need them.
361 We also keep static consts if not optimizing (for debugging),
362 unless the user specified -fno-keep-static-consts.
363 ??? They might be better written into the debug information.
364 This is possible when using DWARF.
366 A language processor that wants static constants to be always
367 written out (even if it is not used) is responsible for
368 calling rest_of_decl_compilation itself. E.g. the C front-end
369 calls rest_of_decl_compilation from finish_decl.
370 One motivation for this is that is conventional in some
371 environments to write things like:
372 static const char rcsid[] = "... version string ...";
373 intending to force the string to be in the executable.
375 A language processor that would prefer to have unneeded
376 static constants "optimized away" would just defer writing
377 them out until here. E.g. C++ does this, because static
378 constants are often defined in header files.
380 ??? A tempting alternative (for both C and C++) would be
381 to force a constant to be written if and only if it is
382 defined in a main file, as opposed to an include file. */
384 if (VAR_P (decl
) && TREE_STATIC (decl
))
388 node
= varpool_node::get (decl
);
390 if (!node
&& flag_ltrans
)
392 else if (node
&& node
->definition
)
394 else if (node
&& node
->alias
)
396 else if (!symtab
->global_info_ready
398 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
400 else if (node
&& node
->analyzed
)
402 else if (DECL_COMDAT (decl
))
404 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
405 && (optimize
|| !flag_keep_static_consts
406 || DECL_ARTIFICIAL (decl
)))
411 rest_of_decl_compilation (decl
, 1, 1);
419 /* Do any final processing required for the declarations in VEC, of
420 which there are LEN. We write out inline functions and variables
421 that have been deferred until this point, but which are required.
422 Returns nonzero if anything was put out. */
425 wrapup_global_declarations (tree
*vec
, int len
)
427 bool reconsider
, output_something
= false;
430 for (i
= 0; i
< len
; i
++)
431 wrapup_global_declaration_1 (vec
[i
]);
433 /* Now emit any global variables or functions that we have been
434 putting off. We need to loop in case one of the things emitted
435 here references another one which comes earlier in the list. */
439 for (i
= 0; i
< len
; i
++)
440 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
442 output_something
= true;
446 return output_something
;
449 /* Compile an entire translation unit. Write a file of assembly
450 output and various debugging dumps. */
455 timevar_start (TV_PHASE_PARSING
);
456 timevar_push (TV_PARSE_GLOBAL
);
458 /* Parse entire file and generate initial debug information. */
459 lang_hooks
.parse_file ();
461 timevar_pop (TV_PARSE_GLOBAL
);
462 timevar_stop (TV_PHASE_PARSING
);
464 if (flag_dump_locations
)
465 dump_location_info (stderr
);
467 /* Compilation is now finished except for writing
468 what's left of the symbol table output. */
470 if (flag_syntax_only
|| flag_wpa
)
473 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
474 and this shouldn't influence any types built by the middle-end
475 from now on (like gcov_info_type). */
476 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
478 ggc_protect_identifiers
= false;
480 /* Run the actual compilation process. */
483 timevar_start (TV_PHASE_OPT_GEN
);
484 symtab
->finalize_compilation_unit ();
485 timevar_stop (TV_PHASE_OPT_GEN
);
488 /* Perform any post compilation-proper parser cleanups and
489 processing. This is currently only needed for the C++ parser,
490 which can be hopefully cleaned up so this hook is no longer
492 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
493 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
495 dump_context::get ().finish_any_json_writer ();
500 timevar_start (TV_PHASE_LATE_ASM
);
502 /* Compilation unit is finalized. When producing non-fat LTO object, we are
503 basically finished. */
504 if ((in_lto_p
&& flag_incremental_link
!= INCREMENTAL_LINK_LTO
)
505 || !flag_lto
|| flag_fat_lto_objects
)
507 /* File-scope initialization for AddressSanitizer. */
508 if (flag_sanitize
& SANITIZE_ADDRESS
)
511 if (flag_sanitize
& SANITIZE_THREAD
)
516 output_shared_constant_pool ();
517 output_object_blocks ();
518 finish_tm_clone_pairs ();
520 /* Write out any pending weak symbol declarations. */
523 /* This must be at the end before unwind and debug info.
524 Some target ports emit PIC setup thunks here. */
525 targetm
.asm_out
.code_end ();
527 /* Do dbx symbols. */
528 timevar_push (TV_SYMOUT
);
530 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
531 dwarf2out_frame_finish ();
535 (*debug_hooks
->finish
) (main_input_filename
);
537 timevar_pop (TV_SYMOUT
);
539 /* Output some stuff at end of file if nec. */
541 dw2_output_indirect_constants ();
543 /* Flush any pending external directives. */
544 process_pending_assemble_externals ();
547 /* Let linker plugin know that this is a slim object and must be LTOed
548 even when user did not ask for it. */
549 if (flag_generate_lto
&& !flag_fat_lto_objects
)
551 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
552 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
553 HOST_WIDE_INT_1U
, 8);
554 #elif defined ASM_OUTPUT_ALIGNED_COMMON
555 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
556 HOST_WIDE_INT_1U
, 8);
558 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
564 /* Attach a special .ident directive to the end of the file to identify
565 the version of GCC which compiled this code. The format of the .ident
566 string is patterned after the ones produced by native SVR4 compilers. */
569 const char *pkg_version
= "(GNU) ";
572 if (strcmp ("(GCC) ", pkgversion_string
))
573 pkg_version
= pkgversion_string
;
575 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
576 targetm
.asm_out
.output_ident (ident_str
);
579 /* Auto profile finalization. */
580 if (flag_auto_profile
)
583 /* Invoke registered plugin callbacks. */
584 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
586 /* This must be at the end. Some target ports emit end of file directives
587 into the assembly file here, and hence we cannot output anything to the
588 assembly file after this point. */
589 targetm
.asm_out
.file_end ();
591 timevar_stop (TV_PHASE_LATE_ASM
);
594 /* Print version information to FILE.
595 Each line begins with INDENT (for the case where FILE is the
596 assembler output file).
598 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
599 proper and can print pertinent state (e.g. params and plugins).
601 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
602 compiler, and we don't hold the mutex on the compiler's global state:
603 we can't print params and plugins, since they might not be initialized,
604 or might be being manipulated by a compile running in another
608 print_version (FILE *file
, const char *indent
, bool show_global_state
)
610 static const char fmt1
[] =
612 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
614 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
617 static const char fmt2
[] =
618 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n");
619 static const char fmt3
[] =
620 N_("%s%swarning: %s header version %s differs from library version %s.\n");
621 static const char fmt4
[] =
622 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
624 #define __VERSION__ "[?]"
627 file
== stderr
? _(fmt1
) : fmt1
,
628 indent
, *indent
!= 0 ? " " : "",
629 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
630 indent
, __VERSION__
);
632 /* We need to stringify the GMP macro values. Ugh, gmp_version has
633 two string formats, "i.j.k" and "i.j" when k is zero. As of
634 gmp-4.3.0, GMP always uses the 3 number format. */
635 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
636 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
637 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
638 #define GCC_GMP_VERSION \
639 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
640 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
641 #define GCC_GMP_STRINGIFY_VERSION \
642 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
643 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
645 #define GCC_GMP_STRINGIFY_VERSION \
646 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
647 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
648 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
651 file
== stderr
? _(fmt2
) : fmt2
,
652 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
,
659 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
661 file
== stderr
? _(fmt3
) : fmt3
,
662 indent
, *indent
!= 0 ? " " : "",
663 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
664 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
666 file
== stderr
? _(fmt3
) : fmt3
,
667 indent
, *indent
!= 0 ? " " : "",
668 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
669 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
671 file
== stderr
? _(fmt3
) : fmt3
,
672 indent
, *indent
!= 0 ? " " : "",
673 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
675 if (show_global_state
)
678 file
== stderr
? _(fmt4
) : fmt4
,
679 indent
, *indent
!= 0 ? " " : "",
680 param_ggc_min_expand
, param_ggc_min_heapsize
);
682 print_plugins_versions (file
, indent
);
687 print_to_asm_out_file (print_switch_type type
, const char * text
)
689 bool prepend_sep
= true;
693 case SWITCH_TYPE_LINE_END
:
694 putc ('\n', asm_out_file
);
697 case SWITCH_TYPE_LINE_START
:
698 fputs (ASM_COMMENT_START
, asm_out_file
);
699 return strlen (ASM_COMMENT_START
);
701 case SWITCH_TYPE_DESCRIPTIVE
:
702 if (ASM_COMMENT_START
[0] == 0)
705 case SWITCH_TYPE_PASSED
:
706 case SWITCH_TYPE_ENABLED
:
708 fputc (' ', asm_out_file
);
709 fputs (text
, asm_out_file
);
710 /* No need to return the length here as
711 print_single_switch has already done it. */
720 print_to_stderr (print_switch_type type
, const char * text
)
724 case SWITCH_TYPE_LINE_END
:
728 case SWITCH_TYPE_LINE_START
:
731 case SWITCH_TYPE_PASSED
:
732 case SWITCH_TYPE_ENABLED
:
736 case SWITCH_TYPE_DESCRIPTIVE
:
737 fputs (text
, stderr
);
738 /* No need to return the length here as
739 print_single_switch has already done it. */
747 /* Print an option value and return the adjusted position in the line.
748 ??? print_fn doesn't handle errors, eg disk full; presumably other
749 code will catch a disk full though. */
752 print_single_switch (print_switch_fn_type print_fn
,
754 print_switch_type type
,
757 /* The ultrix fprintf returns 0 on success, so compute the result
758 we want here since we need it for the following test. The +1
759 is for the separator character that will probably be emitted. */
760 int len
= strlen (text
) + 1;
763 && pos
+ len
> MAX_LINE
)
765 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
770 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
772 print_fn (type
, text
);
776 /* Print active target switches using PRINT_FN.
777 POS is the current cursor position and MAX is the size of a "line".
778 Each line begins with INDENT and ends with TERM.
779 Each switch is separated from the next by SEP. */
782 print_switch_values (print_switch_fn_type print_fn
)
787 /* Print the options as passed. */
788 pos
= print_single_switch (print_fn
, pos
,
789 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
791 for (j
= 1; j
< save_decoded_options_count
; j
++)
793 switch (save_decoded_options
[j
].opt_index
)
798 case OPT_dumpbase_ext
:
806 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
807 save_decoded_options
[j
].orig_option_with_args_text
);
811 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
813 /* Print the -f and -m options that have been enabled.
814 We don't handle language specific options but printing argv
816 pos
= print_single_switch (print_fn
, 0,
817 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
819 unsigned lang_mask
= lang_hooks
.option_lang_mask ();
820 for (j
= 0; j
< cl_options_count
; j
++)
821 if (cl_options
[j
].cl_report
822 && option_enabled (j
, lang_mask
, &global_options
) > 0)
823 pos
= print_single_switch (print_fn
, pos
,
824 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
826 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
829 /* Open assembly code output file. Do this even if -fsyntax-only is
830 on, because then the driver will have provided the name of a
831 temporary file or bit bucket for us. NAME is the file specified on
832 the command line, possibly NULL. */
834 init_asm_output (const char *name
)
836 if (name
== NULL
&& asm_file_name
== 0)
837 asm_out_file
= stdout
;
840 if (asm_file_name
== 0)
842 int len
= strlen (dump_base_name
);
843 char *dumpname
= XNEWVEC (char, len
+ 6);
845 memcpy (dumpname
, dump_base_name
, len
+ 1);
846 strip_off_ending (dumpname
, len
);
847 strcat (dumpname
, ".s");
848 asm_file_name
= dumpname
;
850 if (!strcmp (asm_file_name
, "-"))
851 asm_out_file
= stdout
;
852 else if (!canonical_filename_eq (asm_file_name
, name
)
853 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
854 asm_out_file
= fopen (asm_file_name
, "w");
856 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
857 line in the current file. */
858 fatal_error (UNKNOWN_LOCATION
,
859 "input file %qs is the same as output file",
861 if (asm_out_file
== 0)
862 fatal_error (UNKNOWN_LOCATION
,
863 "cannot open %qs for writing: %m", asm_file_name
);
866 if (!flag_syntax_only
)
868 targetm
.asm_out
.file_start ();
870 if (flag_record_gcc_switches
)
872 if (targetm
.asm_out
.record_gcc_switches
)
874 /* Let the target know that we are about to start recording. */
875 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
877 /* Now record the switches. */
878 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
879 /* Let the target know that the recording is over. */
880 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
884 inform (UNKNOWN_LOCATION
,
885 "%<-frecord-gcc-switches%> is not supported by "
886 "the current target");
889 if (flag_verbose_asm
)
891 /* Print the list of switches in effect
892 into the assembler file as comments. */
893 print_version (asm_out_file
, ASM_COMMENT_START
, true);
894 print_switch_values (print_to_asm_out_file
);
895 putc ('\n', asm_out_file
);
900 /* A helper function; used as the reallocator function for cpp's line
903 realloc_for_line_map (void *ptr
, size_t len
)
905 return ggc_realloc (ptr
, len
);
908 /* A helper function: used as the allocator function for
909 identifier_to_locale. */
911 alloc_for_identifier_to_locale (size_t len
)
913 return ggc_alloc_atomic (len
);
916 /* Output stack usage information. */
918 output_stack_usage_1 (FILE *cf
)
920 static bool warning_issued
= false;
921 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
922 const char *stack_usage_kind_str
[] = {
927 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
928 enum stack_usage_kind_type stack_usage_kind
;
934 warning (0, "stack usage computation not supported for this target");
935 warning_issued
= true;
940 stack_usage_kind
= STATIC
;
942 /* Add the maximum amount of space pushed onto the stack. */
943 if (maybe_ne (current_function_pushed_stack_size
, 0))
946 if (current_function_pushed_stack_size
.is_constant (&extra
))
948 stack_usage
+= extra
;
949 stack_usage_kind
= DYNAMIC_BOUNDED
;
953 extra
= constant_lower_bound (current_function_pushed_stack_size
);
954 stack_usage
+= extra
;
955 stack_usage_kind
= DYNAMIC
;
959 /* Now on to the tricky part: dynamic stack allocation. */
960 if (current_function_allocates_dynamic_stack_space
)
962 if (stack_usage_kind
!= DYNAMIC
)
964 if (current_function_has_unbounded_dynamic_stack_size
)
965 stack_usage_kind
= DYNAMIC
;
967 stack_usage_kind
= DYNAMIC_BOUNDED
;
970 /* Add the size even in the unbounded case, this can't hurt. */
971 stack_usage
+= current_function_dynamic_stack_size
;
974 if (cf
&& flag_callgraph_info
& CALLGRAPH_INFO_STACK_USAGE
)
975 fprintf (cf
, "\\n" HOST_WIDE_INT_PRINT_DEC
" bytes (%s)",
977 stack_usage_kind_str
[stack_usage_kind
]);
979 if (stack_usage_file
)
981 print_decl_identifier (stack_usage_file
, current_function_decl
,
982 PRINT_DECL_ORIGIN
| PRINT_DECL_NAME
);
983 fprintf (stack_usage_file
, "\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
984 stack_usage
, stack_usage_kind_str
[stack_usage_kind
]);
987 if (warn_stack_usage
>= 0 && warn_stack_usage
< HOST_WIDE_INT_MAX
)
989 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
991 if (stack_usage_kind
== DYNAMIC
)
992 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
993 else if (stack_usage
> warn_stack_usage
)
995 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
997 OPT_Wstack_usage_
, "stack usage might be %wu bytes",
1000 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wu bytes",
1006 /* Dump placeholder node for indirect calls in VCG format. */
1008 #define INDIRECT_CALL_NAME "__indirect_call"
1011 dump_final_node_vcg_start (FILE *f
, tree decl
)
1013 fputs ("node: { title: \"", f
);
1015 print_decl_identifier (f
, decl
, PRINT_DECL_UNIQUE_NAME
);
1017 fputs (INDIRECT_CALL_NAME
, f
);
1018 fputs ("\" label: \"", f
);
1021 print_decl_identifier (f
, decl
, PRINT_DECL_NAME
);
1023 print_decl_identifier (f
, decl
, PRINT_DECL_ORIGIN
);
1026 fputs ("Indirect Call Placeholder", f
);
1029 /* Dump final cgraph edge in VCG format. */
1032 dump_final_callee_vcg (FILE *f
, location_t location
, tree callee
)
1034 if ((!callee
|| DECL_EXTERNAL (callee
))
1035 && bitmap_set_bit (callgraph_info_external_printed
,
1036 callee
? DECL_UID (callee
) + 1 : 0))
1038 dump_final_node_vcg_start (f
, callee
);
1039 fputs ("\" shape : ellipse }\n", f
);
1042 fputs ("edge: { sourcename: \"", f
);
1043 print_decl_identifier (f
, current_function_decl
, PRINT_DECL_UNIQUE_NAME
);
1044 fputs ("\" targetname: \"", f
);
1046 print_decl_identifier (f
, callee
, PRINT_DECL_UNIQUE_NAME
);
1048 fputs (INDIRECT_CALL_NAME
, f
);
1049 if (LOCATION_LOCUS (location
) != UNKNOWN_LOCATION
)
1051 expanded_location loc
;
1052 fputs ("\" label: \"", f
);
1053 loc
= expand_location (location
);
1054 fprintf (f
, "%s:%d:%d", loc
.file
, loc
.line
, loc
.column
);
1056 fputs ("\" }\n", f
);
1059 /* Dump final cgraph node in VCG format. */
1062 dump_final_node_vcg (FILE *f
)
1064 dump_final_node_vcg_start (f
, current_function_decl
);
1066 if (flag_stack_usage_info
1067 || (flag_callgraph_info
& CALLGRAPH_INFO_STACK_USAGE
))
1068 output_stack_usage_1 (f
);
1070 if (flag_callgraph_info
& CALLGRAPH_INFO_DYNAMIC_ALLOC
)
1072 fprintf (f
, "\\n%u dynamic objects", vec_safe_length (cfun
->su
->dallocs
));
1075 callinfo_dalloc
*cda
;
1076 FOR_EACH_VEC_SAFE_ELT (cfun
->su
->dallocs
, i
, cda
)
1078 expanded_location loc
= expand_location (cda
->location
);
1079 fprintf (f
, "\\n %s", cda
->name
);
1080 fprintf (f
, " %s:%d:%d", loc
.file
, loc
.line
, loc
.column
);
1083 vec_free (cfun
->su
->dallocs
);
1084 cfun
->su
->dallocs
= NULL
;
1087 fputs ("\" }\n", f
);
1091 FOR_EACH_VEC_SAFE_ELT (cfun
->su
->callees
, i
, c
)
1092 dump_final_callee_vcg (f
, c
->location
, c
->decl
);
1093 vec_free (cfun
->su
->callees
);
1094 cfun
->su
->callees
= NULL
;
1097 /* Output stack usage and callgraph info, as requested. */
1099 output_stack_usage (void)
1101 if (flag_callgraph_info
)
1102 dump_final_node_vcg (callgraph_info_file
);
1104 output_stack_usage_1 (NULL
);
1107 /* Open an auxiliary output file. */
1109 open_auxiliary_file (const char *ext
)
1114 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1115 file
= fopen (filename
, "w");
1117 fatal_error (input_location
, "cannot open %s for writing: %m", filename
);
1122 /* Alternative diagnostics callback for reentered ICE reporting. */
1125 internal_error_reentered (diagnostic_context
*, const char *, va_list *)
1127 /* Flush the dump file if emergency_dump_function itself caused an ICE. */
1132 /* Auxiliary callback for the diagnostics code. */
1135 internal_error_function (diagnostic_context
*, const char *, va_list *)
1137 global_dc
->internal_error
= internal_error_reentered
;
1139 emergency_dump_function ();
1142 /* Initialization of the front end environment, before command line
1143 options are parsed. Signal handlers, internationalization etc.
1144 ARGV0 is main's argv[0]. */
1146 general_init (const char *argv0
, bool init_signals
)
1150 p
= argv0
+ strlen (argv0
);
1151 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1155 xmalloc_set_program_name (progname
);
1159 /* Unlock the stdio streams. */
1160 unlock_std_streams ();
1162 gcc_init_libintl ();
1164 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1165 identifier_to_locale_free
= ggc_free
;
1167 /* Initialize the diagnostics reporting machinery, so option parsing
1168 can give warnings and errors. */
1169 diagnostic_initialize (global_dc
, N_OPTS
);
1170 global_dc
->lang_mask
= lang_hooks
.option_lang_mask ();
1171 /* Set a default printer. Language specific initializations will
1172 override it later. */
1173 tree_diagnostics_defaults (global_dc
);
1175 global_dc
->show_caret
1176 = global_options_init
.x_flag_diagnostics_show_caret
;
1177 global_dc
->show_labels_p
1178 = global_options_init
.x_flag_diagnostics_show_labels
;
1179 global_dc
->show_line_numbers_p
1180 = global_options_init
.x_flag_diagnostics_show_line_numbers
;
1182 = global_options_init
.x_flag_diagnostics_show_cwe
;
1183 global_dc
->path_format
1184 = (enum diagnostic_path_format
)global_options_init
.x_flag_diagnostics_path_format
;
1185 global_dc
->show_path_depths
1186 = global_options_init
.x_flag_diagnostics_show_path_depths
;
1187 global_dc
->show_option_requested
1188 = global_options_init
.x_flag_diagnostics_show_option
;
1189 global_dc
->min_margin_width
1190 = global_options_init
.x_diagnostics_minimum_margin_width
;
1191 global_dc
->show_column
1192 = global_options_init
.x_flag_show_column
;
1193 global_dc
->internal_error
= internal_error_function
;
1194 global_dc
->option_enabled
= option_enabled
;
1195 global_dc
->option_state
= &global_options
;
1196 global_dc
->option_name
= option_name
;
1197 global_dc
->get_option_url
= get_option_url
;
1201 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1203 signal (SIGSEGV
, crash_signal
);
1206 signal (SIGILL
, crash_signal
);
1209 signal (SIGBUS
, crash_signal
);
1212 signal (SIGABRT
, crash_signal
);
1214 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1215 signal (SIGIOT
, crash_signal
);
1218 signal (SIGFPE
, crash_signal
);
1221 /* Other host-specific signal setup. */
1222 (*host_hooks
.extra_signals
)();
1225 /* Initialize the garbage-collector, string pools and tree type hash
1229 input_location
= UNKNOWN_LOCATION
;
1230 line_table
= ggc_alloc
<line_maps
> ();
1231 linemap_init (line_table
, BUILTINS_LOCATION
);
1232 line_table
->reallocator
= realloc_for_line_map
;
1233 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1234 line_table
->default_range_bits
= 5;
1237 /* Initialize register usage now so switches may override. */
1240 /* Create the singleton holder for global state. This creates the
1242 g
= new gcc::context ();
1244 /* Allow languages and middle-end to register their dumps before the
1245 optimization passes. */
1246 g
->get_dumps ()->register_dumps ();
1248 /* Create the passes. */
1249 g
->set_passes (new gcc::pass_manager (g
));
1251 symtab
= new (ggc_alloc
<symbol_table
> ()) symbol_table ();
1253 statistics_early_init ();
1254 debuginfo_early_init ();
1257 /* Return true if the current target supports -fsection-anchors. */
1260 target_supports_section_anchors_p (void)
1262 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1265 if (targetm
.asm_out
.output_anchor
== NULL
)
1271 /* Parse "N[:M][:...]" into struct align_flags A.
1272 VALUES contains parsed values (in reverse order), all processed
1273 values are popped. */
1276 read_log_maxskip (auto_vec
<unsigned> &values
, align_flags_tuple
*a
)
1278 unsigned n
= values
.pop ();
1280 a
->log
= floor_log2 (n
* 2 - 1);
1282 if (values
.is_empty ())
1283 a
->maxskip
= n
? n
- 1 : 0;
1286 unsigned m
= values
.pop ();
1287 /* -falign-foo=N:M means M-1 max bytes of padding, not M. */
1293 /* Normalize the tuple. */
1297 /* Parse "N[:M[:N2[:M2]]]" string FLAG into a pair of struct align_flags. */
1300 parse_N_M (const char *flag
, align_flags
&a
)
1304 static hash_map
<nofree_string_hash
, align_flags
> cache
;
1305 align_flags
*entry
= cache
.get (flag
);
1312 auto_vec
<unsigned> result_values
;
1313 bool r
= parse_and_check_align_values (flag
, NULL
, result_values
, false,
1318 /* Reverse values for easier manipulation. */
1319 result_values
.reverse ();
1321 read_log_maxskip (result_values
, &a
.levels
[0]);
1322 if (!result_values
.is_empty ())
1323 read_log_maxskip (result_values
, &a
.levels
[1]);
1327 /* N2[:M2] is not specified. This arch has a default for N2.
1328 Before -falign-foo=N:M:N2:M2 was introduced, x86 had a tweak.
1329 -falign-functions=N with N > 8 was adding secondary alignment.
1330 -falign-functions=10 was emitting this before every function:
1333 Now this behavior (and more) can be explicitly requested:
1334 -falign-functions=16:10:8
1335 Retain old behavior if N2 is missing: */
1337 int align
= 1 << a
.levels
[0].log
;
1338 int subalign
= 1 << SUBALIGN_LOG
;
1340 if (a
.levels
[0].log
> SUBALIGN_LOG
1341 && a
.levels
[0].maxskip
>= subalign
- 1)
1343 /* Set N2 unless subalign can never have any effect. */
1344 if (align
> a
.levels
[0].maxskip
+ 1)
1346 a
.levels
[1].log
= SUBALIGN_LOG
;
1347 a
.levels
[1].normalize ();
1353 /* Cache seen value. */
1354 cache
.put (flag
, a
);
1358 /* Process -falign-foo=N[:M[:N2[:M2]]] options. */
1361 parse_alignment_opts (void)
1363 parse_N_M (str_align_loops
, align_loops
);
1364 parse_N_M (str_align_jumps
, align_jumps
);
1365 parse_N_M (str_align_labels
, align_labels
);
1366 parse_N_M (str_align_functions
, align_functions
);
1369 /* Process the options that have been parsed. */
1371 process_options (void)
1373 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1374 This can happen with incorrect pre-processed input. */
1375 debug_hooks
= &do_nothing_debug_hooks
;
1377 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1379 /* Allow the front end to perform consistency checks and do further
1380 initialization based on the command line options. This hook also
1381 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1382 so we can correctly initialize debug output. */
1383 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1385 /* Some machines may reject certain combinations of options. */
1386 location_t saved_location
= input_location
;
1387 input_location
= UNKNOWN_LOCATION
;
1388 targetm
.target_option
.override ();
1389 input_location
= saved_location
;
1391 if (flag_diagnostics_generate_patch
)
1392 global_dc
->edit_context_ptr
= new edit_context ();
1394 /* Avoid any informative notes in the second run of -fcompare-debug. */
1395 if (flag_compare_debug
)
1396 diagnostic_inhibit_notes (global_dc
);
1398 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1400 warning_at (UNKNOWN_LOCATION
, OPT_fsection_anchors
,
1401 "this target does not support %qs",
1402 "-fsection-anchors");
1403 flag_section_anchors
= 0;
1406 if (flag_short_enums
== 2)
1407 flag_short_enums
= targetm
.default_short_enums ();
1409 /* Set aux_base_name if not already set. */
1412 else if (dump_base_name
)
1414 const char *name
= dump_base_name
;
1417 if (dump_base_ext
&& (len
= strlen (dump_base_ext
))
1418 && (nlen
= strlen (name
)) && nlen
> len
1419 && strcmp (name
+ nlen
- len
, dump_base_ext
) == 0)
1421 char *p
= xstrndup (name
, nlen
- len
);
1425 aux_base_name
= name
;
1428 aux_base_name
= "gccaux";
1432 || flag_loop_nest_optimize
1433 || flag_graphite_identity
1434 || flag_loop_parallelize_all
)
1435 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1436 "(%<-fgraphite%>, %<-fgraphite-identity%>, "
1437 "%<-floop-nest-optimize%>, %<-floop-parallelize-all%>)");
1440 if (flag_cf_protection
!= CF_NONE
1441 && !(flag_cf_protection
& CF_SET
))
1443 if (flag_cf_protection
== CF_FULL
)
1445 error_at (UNKNOWN_LOCATION
,
1446 "%<-fcf-protection=full%> is not supported for this "
1448 flag_cf_protection
= CF_NONE
;
1450 if (flag_cf_protection
== CF_BRANCH
)
1452 error_at (UNKNOWN_LOCATION
,
1453 "%<-fcf-protection=branch%> is not supported for this "
1455 flag_cf_protection
= CF_NONE
;
1457 if (flag_cf_protection
== CF_RETURN
)
1459 error_at (UNKNOWN_LOCATION
,
1460 "%<-fcf-protection=return%> is not supported for this "
1462 flag_cf_protection
= CF_NONE
;
1466 /* One region RA really helps to decrease the code size. */
1467 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1469 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1471 if (!abi_version_at_least (2))
1473 /* -fabi-version=1 support was removed after GCC 4.9. */
1474 error_at (UNKNOWN_LOCATION
,
1475 "%<-fabi-version=1%> is no longer supported");
1476 flag_abi_version
= 2;
1479 /* web and rename-registers help when run after loop unrolling. */
1480 if (flag_web
== AUTODETECT_VALUE
)
1481 flag_web
= flag_unroll_loops
;
1483 if (flag_rename_registers
== AUTODETECT_VALUE
)
1484 flag_rename_registers
= flag_unroll_loops
;
1486 if (flag_non_call_exceptions
)
1487 flag_asynchronous_unwind_tables
= 1;
1488 if (flag_asynchronous_unwind_tables
)
1489 flag_unwind_tables
= 1;
1491 if (flag_value_profile_transformations
)
1492 flag_profile_values
= 1;
1494 /* Warn about options that are not supported on this machine. */
1495 #ifndef INSN_SCHEDULING
1496 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1497 warning_at (UNKNOWN_LOCATION
, 0,
1498 "instruction scheduling not supported on this target machine");
1500 if (!DELAY_SLOTS
&& flag_delayed_branch
)
1501 warning_at (UNKNOWN_LOCATION
, 0,
1502 "this target machine does not have delayed branches");
1504 user_label_prefix
= USER_LABEL_PREFIX
;
1505 if (flag_leading_underscore
!= -1)
1507 /* If the default prefix is more complicated than "" or "_",
1508 issue a warning and ignore this option. */
1509 if (user_label_prefix
[0] == 0 ||
1510 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1512 user_label_prefix
= flag_leading_underscore
? "_" : "";
1515 warning_at (UNKNOWN_LOCATION
, 0,
1516 "%<-f%sleading-underscore%> not supported on this "
1517 "target machine", flag_leading_underscore
? "" : "no-");
1520 /* If we are in verbose mode, write out the version and maybe all the
1521 option flags in use. */
1524 print_version (stderr
, "", true);
1526 print_switch_values (print_to_stderr
);
1529 if (flag_syntax_only
)
1531 write_symbols
= NO_DEBUG
;
1537 if (debug_info_level
== DINFO_LEVEL_NONE
)
1539 debug_info_level
= DINFO_LEVEL_NORMAL
;
1541 if (write_symbols
== NO_DEBUG
)
1542 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1545 debug_info_level
= DINFO_LEVEL_NONE
;
1548 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1550 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1553 error_at (UNKNOWN_LOCATION
,
1554 "could not open final insn dump file %qs: %m",
1555 flag_dump_final_insns
);
1556 flag_dump_final_insns
= NULL
;
1558 else if (fclose (final_output
))
1560 error_at (UNKNOWN_LOCATION
,
1561 "could not close zeroed insn dump file %qs: %m",
1562 flag_dump_final_insns
);
1563 flag_dump_final_insns
= NULL
;
1567 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1569 if (debug_info_level
== DINFO_LEVEL_NONE
)
1570 write_symbols
= NO_DEBUG
;
1572 if (write_symbols
== NO_DEBUG
)
1574 #if defined(DBX_DEBUGGING_INFO)
1575 else if (write_symbols
== DBX_DEBUG
)
1576 debug_hooks
= &dbx_debug_hooks
;
1578 #if defined(XCOFF_DEBUGGING_INFO)
1579 else if (write_symbols
== XCOFF_DEBUG
)
1580 debug_hooks
= &xcoff_debug_hooks
;
1582 #ifdef DWARF2_DEBUGGING_INFO
1583 else if (write_symbols
== DWARF2_DEBUG
)
1584 debug_hooks
= &dwarf2_debug_hooks
;
1586 #ifdef VMS_DEBUGGING_INFO
1587 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1588 debug_hooks
= &vmsdbg_debug_hooks
;
1590 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1591 else if (write_symbols
== DWARF2_DEBUG
)
1592 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1595 error_at (UNKNOWN_LOCATION
,
1596 "target system does not support the %qs debug format",
1597 debug_type_names
[write_symbols
]);
1599 /* We know which debug output will be used so we can set flag_var_tracking
1600 and flag_var_tracking_uninit if the user has not specified them. */
1601 if (debug_info_level
< DINFO_LEVEL_NORMAL
1602 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1604 if (flag_var_tracking
== 1
1605 || flag_var_tracking_uninit
== 1)
1607 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1608 warning_at (UNKNOWN_LOCATION
, 0,
1609 "variable tracking requested, but useless unless "
1610 "producing debug info");
1612 warning_at (UNKNOWN_LOCATION
, 0,
1613 "variable tracking requested, but not supported "
1614 "by this debug format");
1616 flag_var_tracking
= 0;
1617 flag_var_tracking_uninit
= 0;
1620 /* The debug hooks are used to implement -fdump-go-spec because it
1621 gives a simple and stable API for all the information we need to
1623 if (flag_dump_go_spec
!= NULL
)
1624 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1626 /* If the user specifically requested variable tracking with tagging
1627 uninitialized variables, we need to turn on variable tracking.
1628 (We already determined above that variable tracking is feasible.) */
1629 if (flag_var_tracking_uninit
== 1)
1630 flag_var_tracking
= 1;
1632 if (flag_var_tracking
== AUTODETECT_VALUE
)
1633 flag_var_tracking
= optimize
>= 1;
1635 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1636 flag_var_tracking_uninit
= flag_var_tracking
;
1638 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1639 flag_var_tracking_assignments
1640 = (flag_var_tracking
1641 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1643 if (flag_var_tracking_assignments_toggle
)
1644 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1646 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1647 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1649 if (flag_var_tracking_assignments
1650 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1651 warning_at (UNKNOWN_LOCATION
, 0,
1652 "var-tracking-assignments changes selective scheduling");
1654 if (debug_nonbind_markers_p
== AUTODETECT_VALUE
)
1655 debug_nonbind_markers_p
1657 && debug_info_level
>= DINFO_LEVEL_NORMAL
1658 && (write_symbols
== DWARF2_DEBUG
1659 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1660 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1662 if (dwarf2out_as_loc_support
== AUTODETECT_VALUE
)
1663 dwarf2out_as_loc_support
1664 = dwarf2out_default_as_loc_support ();
1665 if (dwarf2out_as_locview_support
== AUTODETECT_VALUE
)
1666 dwarf2out_as_locview_support
1667 = dwarf2out_default_as_locview_support ();
1669 if (debug_variable_location_views
== AUTODETECT_VALUE
)
1671 debug_variable_location_views
1672 = (flag_var_tracking
1673 && debug_info_level
>= DINFO_LEVEL_NORMAL
1674 && (write_symbols
== DWARF2_DEBUG
1675 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1677 && dwarf2out_as_loc_support
1678 && dwarf2out_as_locview_support
);
1680 else if (debug_variable_location_views
== -1 && dwarf_version
!= 5)
1682 warning_at (UNKNOWN_LOCATION
, 0,
1683 "without %<-gdwarf-5%>, "
1684 "%<-gvariable-location-views=incompat5%> "
1685 "is equivalent to %<-gvariable-location-views%>");
1686 debug_variable_location_views
= 1;
1689 if (debug_internal_reset_location_views
== 2)
1691 debug_internal_reset_location_views
1692 = (debug_variable_location_views
1693 && targetm
.reset_location_view
);
1695 else if (debug_internal_reset_location_views
1696 && !debug_variable_location_views
)
1698 warning_at (UNKNOWN_LOCATION
, 0,
1699 "%<-ginternal-reset-location-views%> is forced disabled "
1700 "without %<-gvariable-location-views%>");
1701 debug_internal_reset_location_views
= 0;
1704 if (debug_inline_points
== AUTODETECT_VALUE
)
1705 debug_inline_points
= debug_variable_location_views
;
1706 else if (debug_inline_points
&& !debug_nonbind_markers_p
)
1708 warning_at (UNKNOWN_LOCATION
, 0,
1709 "%<-ginline-points%> is forced disabled without "
1710 "%<-gstatement-frontiers%>");
1711 debug_inline_points
= 0;
1714 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1716 if (HAVE_conditional_move
)
1717 flag_tree_cselim
= 1;
1719 flag_tree_cselim
= 0;
1722 /* If auxiliary info generation is desired, open the output file.
1723 This goes in the same directory as the source file--unlike
1724 all the other output files. */
1725 if (flag_gen_aux_info
)
1727 aux_info_file
= fopen (aux_info_file_name
, "w");
1728 if (aux_info_file
== 0)
1729 fatal_error (UNKNOWN_LOCATION
,
1730 "cannot open %s: %m", aux_info_file_name
);
1733 if (!targetm_common
.have_named_sections
)
1735 if (flag_function_sections
)
1737 warning_at (UNKNOWN_LOCATION
, 0,
1738 "%<-ffunction-sections%> not supported for this target");
1739 flag_function_sections
= 0;
1741 if (flag_data_sections
)
1743 warning_at (UNKNOWN_LOCATION
, 0,
1744 "%<-fdata-sections%> not supported for this target");
1745 flag_data_sections
= 0;
1749 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1751 warning_at (UNKNOWN_LOCATION
, 0,
1752 "%<-fprefetch-loop-arrays%> not supported for this target");
1753 flag_prefetch_loop_arrays
= 0;
1755 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1757 warning_at (UNKNOWN_LOCATION
, 0,
1758 "%<-fprefetch-loop-arrays%> not supported for this target "
1759 "(try %<-march%> switches)");
1760 flag_prefetch_loop_arrays
= 0;
1763 /* This combination of options isn't handled for i386 targets and doesn't
1764 make much sense anyway, so don't allow it. */
1765 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1767 warning_at (UNKNOWN_LOCATION
, 0,
1768 "%<-fprefetch-loop-arrays%> is not supported with %<-Os%>");
1769 flag_prefetch_loop_arrays
= 0;
1772 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1773 if (flag_signaling_nans
)
1774 flag_trapping_math
= 1;
1776 /* We cannot reassociate if we want traps or signed zeros. */
1777 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1779 warning_at (UNKNOWN_LOCATION
, 0,
1780 "%<-fassociative-math%> disabled; other options take "
1782 flag_associative_math
= 0;
1785 /* -fstack-clash-protection is not currently supported on targets
1786 where the stack grows up. */
1787 if (flag_stack_clash_protection
&& !STACK_GROWS_DOWNWARD
)
1789 warning_at (UNKNOWN_LOCATION
, 0,
1790 "%<-fstack-clash-protection%> is not supported on targets "
1791 "where the stack grows from lower to higher addresses");
1792 flag_stack_clash_protection
= 0;
1795 /* We cannot support -fstack-check= and -fstack-clash-protection at
1797 if (flag_stack_check
!= NO_STACK_CHECK
&& flag_stack_clash_protection
)
1799 warning_at (UNKNOWN_LOCATION
, 0,
1800 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1801 "mutually exclusive; disabling %<-fstack-check=%>");
1802 flag_stack_check
= NO_STACK_CHECK
;
1805 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1806 if (flag_cx_limited_range
)
1807 flag_complex_method
= 0;
1809 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1810 if (flag_cx_fortran_rules
)
1811 flag_complex_method
= 1;
1813 /* Targets must be able to place spill slots at lower addresses. If the
1814 target already uses a soft frame pointer, the transition is trivial. */
1815 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1817 warning_at (UNKNOWN_LOCATION
, 0,
1818 "%<-fstack-protector%> not supported for this target");
1819 flag_stack_protect
= 0;
1821 if (!flag_stack_protect
)
1822 warn_stack_protect
= 0;
1824 /* Address Sanitizer needs porting to each target architecture. */
1826 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1827 && !FRAME_GROWS_DOWNWARD
)
1829 warning_at (UNKNOWN_LOCATION
, 0,
1830 "%<-fsanitize=address%> and %<-fsanitize=kernel-address%> "
1831 "are not supported for this target");
1832 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1835 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1836 && targetm
.asan_shadow_offset
== NULL
)
1838 warning_at (UNKNOWN_LOCATION
, 0,
1839 "%<-fsanitize=address%> not supported for this target");
1840 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1843 if ((flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1844 && (targetm
.asan_shadow_offset
== NULL
1846 && !asan_shadow_offset_set_p ()))
1848 warning_at (UNKNOWN_LOCATION
, 0,
1849 "%<-fsanitize=kernel-address%> with stack protection "
1850 "is not supported without %<-fasan-shadow-offset=%> "
1852 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1855 /* Do not use IPA optimizations for register allocation if profiler is active
1856 or patchable function entries are inserted for run-time instrumentation
1857 or port does not emit prologue and epilogue as RTL. */
1858 if (profile_flag
|| function_entry_patch_area_size
1859 || !targetm
.have_prologue () || !targetm
.have_epilogue ())
1862 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1863 have not been set. */
1864 if (!global_options_set
.x_warnings_are_errors
1865 && warn_coverage_mismatch
1866 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1868 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1869 DK_ERROR
, UNKNOWN_LOCATION
);
1871 /* Save the current optimization options. */
1872 optimization_default_node
1873 = build_optimization_node (&global_options
, &global_options_set
);
1874 optimization_current_node
= optimization_default_node
;
1876 if (flag_checking
>= 2)
1877 hash_table_sanitize_eq_limit
1878 = param_hash_table_verification_limit
;
1880 if (flag_large_source_files
)
1881 line_table
->default_range_bits
= 0;
1883 /* Please don't change global_options after this point, those changes won't
1884 be reflected in optimization_{default,current}_node. */
1887 /* This function can be called multiple times to reinitialize the compiler
1888 back end when register classes or instruction sets have changed,
1889 before each function. */
1891 backend_init_target (void)
1893 /* This depends on stack_pointer_rtx. */
1894 init_fake_stack_mems ();
1896 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1898 init_alias_target ();
1900 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1904 /* Depends on the enabled attribute. */
1907 /* The following initialization functions need to generate rtl, so
1908 provide a dummy function context for them. */
1909 init_dummy_function_start ();
1911 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1912 on a mode change. */
1914 init_lower_subreg ();
1917 init_expr_target ();
1920 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1921 after a mode change as well. */
1922 caller_save_initialized_p
= false;
1924 expand_dummy_function_end ();
1927 /* Initialize the compiler back end. This function is called only once,
1928 when starting the compiler. */
1935 init_inline_once ();
1936 init_varasm_once ();
1937 save_register_info ();
1939 /* Middle end needs this initialization for default mem attributes
1940 used by early calls to make_decl_rtl. */
1943 /* Middle end needs this initialization for mode tables used to assign
1944 modes to vector variables. */
1948 /* Initialize things that are both lang-dependent and target-dependent.
1949 This function can be called more than once if target parameters change. */
1951 lang_dependent_init_target (void)
1953 /* This creates various _DECL nodes, so needs to be called after the
1954 front end is initialized. It also depends on the HAVE_xxx macros
1955 generated from the target machine description. */
1958 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1961 /* Perform initializations that are lang-dependent or target-dependent.
1962 but matters only for late optimizations and RTL generation. */
1964 static int rtl_initialized
;
1967 initialize_rtl (void)
1969 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1971 /* Initialization done just once per compilation, but delayed
1972 till code generation. */
1973 if (!rtl_initialized
)
1975 rtl_initialized
= true;
1977 /* Target specific RTL backend initialization. */
1978 if (!this_target_rtl
->target_specific_initialized
)
1980 backend_init_target ();
1981 this_target_rtl
->target_specific_initialized
= true;
1985 /* Language-dependent initialization. Returns nonzero on success. */
1987 lang_dependent_init (const char *name
)
1989 location_t save_loc
= input_location
;
1990 if (!dump_base_name
)
1992 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1994 /* We do not want to derive a non-empty dumpbase-ext from an
1995 explicit -dumpbase argument, only from a defaulted
1999 const char *base
= lbasename (dump_base_name
);
2000 const char *ext
= strrchr (base
, '.');
2002 dump_base_ext
= ext
;
2006 /* Other front-end initialization. */
2007 input_location
= BUILTINS_LOCATION
;
2008 if (lang_hooks
.init () == 0)
2010 input_location
= save_loc
;
2014 init_asm_output (name
);
2016 if (!flag_generate_lto
&& !flag_compare_debug
)
2018 /* If stack usage information is desired, open the output file. */
2019 if (flag_stack_usage
)
2020 stack_usage_file
= open_auxiliary_file ("su");
2022 /* If call graph information is desired, open the output file. */
2023 if (flag_callgraph_info
)
2025 callgraph_info_file
= open_auxiliary_file ("ci");
2026 /* Write the file header. */
2027 fprintf (callgraph_info_file
,
2028 "graph: { title: \"%s\"\n", main_input_filename
);
2029 bitmap_obstack_initialize (NULL
);
2030 callgraph_info_external_printed
= BITMAP_ALLOC (NULL
);
2034 flag_stack_usage
= flag_callgraph_info
= false;
2037 /* This creates various _DECL nodes, so needs to be called after the
2038 front end is initialized. */
2041 /* Do the target-specific parts of the initialization. */
2042 lang_dependent_init_target ();
2046 /* If dbx symbol table desired, initialize writing it and output the
2047 predefined types. */
2048 timevar_push (TV_SYMOUT
);
2050 /* Now we have the correct original filename, we can initialize
2052 (*debug_hooks
->init
) (name
);
2054 timevar_pop (TV_SYMOUT
);
2061 /* Reinitialize everything when target parameters, such as register usage,
2064 target_reinit (void)
2066 struct rtl_data saved_x_rtl
;
2067 rtx
*saved_regno_reg_rtx
;
2068 tree saved_optimization_current_node
;
2069 struct target_optabs
*saved_this_fn_optabs
;
2071 /* Temporarily switch to the default optimization node, so that
2072 *this_target_optabs is set to the default, not reflecting
2073 whatever a previous function used for the optimize
2075 saved_optimization_current_node
= optimization_current_node
;
2076 saved_this_fn_optabs
= this_fn_optabs
;
2077 if (saved_optimization_current_node
!= optimization_default_node
)
2079 optimization_current_node
= optimization_default_node
;
2080 cl_optimization_restore
2081 (&global_options
, &global_options_set
,
2082 TREE_OPTIMIZATION (optimization_default_node
));
2084 this_fn_optabs
= this_target_optabs
;
2086 /* Save *crtl and regno_reg_rtx around the reinitialization
2087 to allow target_reinit being called even after prepare_function_start. */
2088 saved_regno_reg_rtx
= regno_reg_rtx
;
2089 if (saved_regno_reg_rtx
)
2091 saved_x_rtl
= *crtl
;
2092 memset (crtl
, '\0', sizeof (*crtl
));
2093 regno_reg_rtx
= NULL
;
2096 this_target_rtl
->target_specific_initialized
= false;
2098 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
2099 to initialize reg_raw_mode[]. */
2102 /* This invokes target hooks to set fixed_reg[] etc, which is
2106 /* Reinitialize lang-dependent parts. */
2107 lang_dependent_init_target ();
2109 /* Restore the original optimization node. */
2110 if (saved_optimization_current_node
!= optimization_default_node
)
2112 optimization_current_node
= saved_optimization_current_node
;
2113 cl_optimization_restore (&global_options
, &global_options_set
,
2114 TREE_OPTIMIZATION (optimization_current_node
));
2116 this_fn_optabs
= saved_this_fn_optabs
;
2118 /* Restore regno_reg_rtx at the end, as free_after_compilation from
2119 expand_dummy_function_end clears it. */
2120 if (saved_regno_reg_rtx
)
2122 *crtl
= saved_x_rtl
;
2123 regno_reg_rtx
= saved_regno_reg_rtx
;
2124 saved_regno_reg_rtx
= NULL
;
2129 dump_memory_report (const char *header
)
2131 /* Print significant header. */
2132 fputc ('\n', stderr
);
2133 for (unsigned i
= 0; i
< 80; i
++)
2134 fputc ('#', stderr
);
2135 fprintf (stderr
, "\n# %-77s#\n", header
);
2136 for (unsigned i
= 0; i
< 80; i
++)
2137 fputc ('#', stderr
);
2138 fputs ("\n\n", stderr
);
2140 dump_line_table_statistics ();
2141 ggc_print_statistics ();
2142 stringpool_statistics ();
2143 dump_tree_statistics ();
2144 dump_gimple_statistics ();
2145 dump_rtx_statistics ();
2146 dump_alloc_pool_statistics ();
2147 dump_bitmap_statistics ();
2148 dump_hash_table_loc_statistics ();
2149 dump_vec_loc_statistics ();
2150 dump_ggc_loc_statistics ();
2151 dump_alias_stats (stderr
);
2152 dump_pta_stats (stderr
);
2155 /* Clean up: close opened files, etc. */
2158 finalize (bool no_backend
)
2160 /* Close the dump files. */
2161 if (flag_gen_aux_info
)
2163 fclose (aux_info_file
);
2164 aux_info_file
= NULL
;
2166 unlink (aux_info_file_name
);
2169 /* Close non-debugging input and output files. Take special care to note
2170 whether fclose returns an error, since the pages might still be on the
2171 buffer chain while the file is open. */
2175 if (ferror (asm_out_file
) != 0)
2176 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
2177 if (fclose (asm_out_file
) != 0)
2178 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
2179 asm_out_file
= NULL
;
2182 if (stack_usage_file
)
2184 fclose (stack_usage_file
);
2185 stack_usage_file
= NULL
;
2188 if (callgraph_info_file
)
2190 fputs ("}\n", callgraph_info_file
);
2191 fclose (callgraph_info_file
);
2192 callgraph_info_file
= NULL
;
2193 BITMAP_FREE (callgraph_info_external_printed
);
2194 bitmap_obstack_release (NULL
);
2198 coverage_remove_note_file ();
2205 g
->get_passes ()->finish_optimization_passes ();
2211 dump_memory_report ("Final");
2214 dump_profile_report ();
2216 /* Language-specific end of compilation actions. */
2217 lang_hooks
.finish ();
2221 standard_type_bitsize (int bitsize
)
2223 /* As a special exception, we always want __int128 enabled if possible. */
2226 if (bitsize
== CHAR_TYPE_SIZE
2227 || bitsize
== SHORT_TYPE_SIZE
2228 || bitsize
== INT_TYPE_SIZE
2229 || bitsize
== LONG_TYPE_SIZE
2230 || bitsize
== LONG_LONG_TYPE_SIZE
)
2235 /* Initialize the compiler, and compile the input file. */
2241 /* Don't do any more if an error has already occurred. */
2246 timevar_start (TV_PHASE_SETUP
);
2248 if (flag_save_optimization_record
)
2250 dump_context::get ().set_json_writer (new optrecord_json_writer ());
2253 /* This must be run always, because it is needed to compute the FP
2254 predefined macros, such as __LDBL_MAX__, for targets using non
2255 default FP formats. */
2256 init_adjust_machine_modes ();
2257 init_derived_machine_modes ();
2259 /* This must happen after the backend has a chance to process
2260 command line options, but before the parsers are
2262 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2263 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2264 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2265 int_n_enabled_p
[i
] = true;
2267 int_n_enabled_p
[i
] = false;
2269 /* Initialize mpfrs exponent range. This is important to get
2270 underflow/overflow in a reasonable timeframe. */
2274 FOR_EACH_MODE_IN_CLASS (mode
, MODE_FLOAT
)
2275 if (SCALAR_FLOAT_MODE_P (mode
))
2277 const real_format
*fmt
= REAL_MODE_FORMAT (mode
);
2280 /* fmt->emin - fmt->p + 1 should be enough but the
2281 back-and-forth dance in real_to_decimal_for_mode we
2282 do for checking fails due to rounding effects then. */
2283 if ((fmt
->emin
- fmt
->p
) < min_exp
)
2284 min_exp
= fmt
->emin
- fmt
->p
;
2285 if (fmt
->emax
> max_exp
)
2286 max_exp
= fmt
->emax
;
2289 /* E.g. mpc_norm assumes it can square a number without bothering with
2290 with range scaling, so until that is fixed, double the minimum
2291 and maximum exponents, plus add some buffer for arithmetics
2292 on the squared numbers. */
2293 if (mpfr_set_emin (2 * (min_exp
- 1))
2294 || mpfr_set_emax (2 * (max_exp
+ 1)))
2295 sorry ("mpfr not configured to handle all floating modes");
2297 /* Set up the back-end if requested. */
2301 /* Language-dependent initialization. Returns true on success. */
2302 if (lang_dependent_init (main_input_filename
))
2304 /* Initialize yet another pass. */
2306 ggc_protect_identifiers
= true;
2308 symtab
->initialize ();
2309 init_final (main_input_filename
);
2310 coverage_init (aux_base_name
);
2313 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2315 timevar_stop (TV_PHASE_SETUP
);
2321 timevar_stop (TV_PHASE_SETUP
);
2324 timevar_start (TV_PHASE_FINALIZE
);
2326 finalize (no_backend
);
2328 timevar_stop (TV_PHASE_FINALIZE
);
2332 toplev::toplev (timer
*external_timer
,
2334 : m_use_TV_TOTAL (external_timer
== NULL
),
2335 m_init_signals (init_signals
)
2338 g_timer
= external_timer
;
2343 if (g_timer
&& m_use_TV_TOTAL
)
2345 g_timer
->stop (TV_TOTAL
);
2346 g_timer
->print (stderr
);
2352 /* Potentially call timevar_init (which will create g_timevars if it
2353 doesn't already exist). */
2356 toplev::start_timevars ()
2358 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2361 timevar_start (TV_TOTAL
);
2364 /* Handle -fself-test. */
2367 toplev::run_self_tests ()
2371 error_at (UNKNOWN_LOCATION
, "self-tests incompatible with %<-E%>");
2375 /* Reset some state. */
2376 input_location
= UNKNOWN_LOCATION
;
2377 bitmap_obstack_initialize (NULL
);
2379 /* Run the tests; any failures will lead to an abort of the process.
2380 Use "make selftests-gdb" to run under the debugger. */
2381 ::selftest::run_tests ();
2384 bitmap_obstack_release (NULL
);
2386 inform (UNKNOWN_LOCATION
, "self-tests are not enabled in this build");
2387 #endif /* #if CHECKING_P */
2390 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2391 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2392 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2394 It is not safe to call this function more than once. */
2397 toplev::main (int argc
, char **argv
)
2399 /* Parsing and gimplification sometimes need quite large stack.
2400 Increase stack size limits if possible. */
2401 stack_limit_increase (64 * 1024 * 1024);
2403 expandargv (&argc
, &argv
);
2405 /* Initialization of GCC's environment, and diagnostics. */
2406 general_init (argv
[0], m_init_signals
);
2408 /* One-off initialization of options that does not need to be
2409 repeated when options are added for particular functions. */
2410 init_options_once ();
2411 init_opts_obstack ();
2413 /* Initialize global options structures; this must be repeated for
2414 each structure used for parsing options. */
2415 init_options_struct (&global_options
, &global_options_set
);
2416 lang_hooks
.init_options_struct (&global_options
);
2418 /* Init GGC heuristics must be caller after we initialize
2420 init_ggc_heuristics ();
2422 /* Convert the options to an array. */
2423 decode_cmdline_options_to_array_default_mask (argc
,
2424 CONST_CAST2 (const char **,
2426 &save_decoded_options
,
2427 &save_decoded_options_count
);
2429 /* Perform language-specific options initialization. */
2430 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2432 /* Parse the options and do minimal processing; basically just
2433 enough to default flags appropriately. */
2434 decode_options (&global_options
, &global_options_set
,
2435 save_decoded_options
, save_decoded_options_count
,
2436 UNKNOWN_LOCATION
, global_dc
,
2437 targetm
.target_option
.override
);
2439 handle_common_deferred_options ();
2443 initialize_plugins ();
2446 print_version (stderr
, "", true);
2449 print_plugins_help (stderr
, "");
2451 /* Exit early if we can (e.g. -help). */
2452 if (!exit_after_options
)
2459 if (warningcount
|| errorcount
|| werrorcount
)
2460 print_ignored_options ();
2465 /* Invoke registered plugin callbacks if any. Some plugins could
2466 emit some diagnostics here. */
2467 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2469 if (flag_diagnostics_generate_patch
)
2471 gcc_assert (global_dc
->edit_context_ptr
);
2474 pp_show_color (&pp
) = pp_show_color (global_dc
->printer
);
2475 global_dc
->edit_context_ptr
->print_diff (&pp
, true);
2479 diagnostic_finish (global_dc
);
2481 finalize_plugins ();
2483 after_memory_report
= true;
2485 if (seen_error () || werrorcount
)
2486 return (FATAL_EXIT_CODE
);
2488 return (SUCCESS_EXIT_CODE
);
2491 /* For those that want to, this function aims to clean up enough state that
2492 you can call toplev::main again. */
2494 toplev::finalize (void)
2496 rtl_initialized
= false;
2497 this_target_rtl
->target_specific_initialized
= false;
2499 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2500 ipa_reference_c_finalize ();
2501 ipa_fnsummary_c_finalize ();
2502 ipa_modref_c_finalize ();
2504 cgraph_c_finalize ();
2505 cgraphunit_c_finalize ();
2506 dwarf2out_c_finalize ();
2508 ipa_cp_c_finalize ();
2509 ira_costs_c_finalize ();
2511 /* save_decoded_options uses opts_obstack, so these must
2512 be cleaned up together. */
2513 obstack_free (&opts_obstack
, NULL
);
2514 XDELETEVEC (save_decoded_options
);
2515 save_decoded_options
= NULL
;
2516 save_decoded_options_count
= 0;
2518 /* Clean up the context (and pass_manager etc). */