1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2018 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
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"
58 #include "dwarf2asm.h"
60 #include "common/common-target.h"
61 #include "langhooks.h"
62 #include "cfgloop.h" /* for init_set_costs */
63 #include "hosthooks.h"
65 #include "opts-diagnostic.h"
66 #include "stringpool.h"
72 #include "pass_manager.h"
73 #include "auto-profile.h"
74 #include "dwarf2out.h"
75 #include "ipa-reference.h"
76 #include "symbol-summary.h"
80 #include "omp-offload.h"
81 #include "hsa-common.h"
82 #include "edit-context.h"
83 #include "tree-pass.h"
85 #include "ipa-fnsummary.h"
86 #include "optinfo-emit-json.h"
88 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
92 #ifdef XCOFF_DEBUGGING_INFO
93 #include "xcoffout.h" /* Needed for external data declarations. */
99 #include <isl/version.h>
102 static void general_init (const char *, bool);
103 static void do_compile ();
104 static void process_options (void);
105 static void backend_init (void);
106 static int lang_dependent_init (const char *);
107 static void init_asm_output (const char *);
108 static void finalize (bool);
110 static void crash_signal (int) ATTRIBUTE_NORETURN
;
111 static void compile_file (void);
113 /* True if we don't need a backend (e.g. preprocessing only). */
114 static bool no_backend
;
116 /* Length of line when printing switch values. */
119 /* Decoded options, and number of such options. */
120 struct cl_decoded_option
*save_decoded_options
;
121 unsigned int save_decoded_options_count
;
123 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
124 to optimize in process_options (). */
125 #define AUTODETECT_VALUE 2
127 /* Debug hooks - dependent upon command line options. */
129 const struct gcc_debug_hooks
*debug_hooks
;
131 /* The FUNCTION_DECL for the function currently being compiled,
132 or 0 if between functions. */
133 tree current_function_decl
;
135 /* Set to the FUNC_BEGIN label of the current function, or NULL
137 const char * current_function_func_begin_label
;
139 /* A random sequence of characters, unless overridden by user. */
140 static const char *flag_random_seed
;
142 /* A local time stamp derived from the time of compilation. It will be
143 zero if the system cannot provide a time. It will be -1u, if the
144 user has specified a particular random seed. */
147 /* Random number for this compilation */
148 HOST_WIDE_INT random_seed
;
152 /* When non-NULL, indicates that whenever space is allocated on the
153 stack, the resulting stack pointer must not pass this
154 address---that is, for stacks that grow downward, the stack pointer
155 must always be greater than or equal to this address; for stacks
156 that grow upward, the stack pointer must be less than this address.
157 At present, the rtx may be either a REG or a SYMBOL_REF, although
158 the support provided depends on the backend. */
161 struct target_flag_state default_target_flag_state
;
162 #if SWITCHABLE_TARGET
163 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
165 #define this_target_flag_state (&default_target_flag_state)
168 /* The user symbol prefix after having resolved same. */
169 const char *user_label_prefix
;
171 /* Output files for assembler code (real compiler output)
172 and debugging dumps. */
176 FILE *stack_usage_file
= NULL
;
178 /* The current working directory of a translation. It's generally the
179 directory from which compilation was initiated, but a preprocessed
180 file may specify the original directory in which it was
183 static const char *src_pwd
;
185 /* Initialize src_pwd with the given string, and return true. If it
186 was already initialized, return false. As a special case, it may
187 be called with a NULL argument to test whether src_pwd has NOT been
191 set_src_pwd (const char *pwd
)
195 if (strcmp (src_pwd
, pwd
) == 0)
201 src_pwd
= xstrdup (pwd
);
205 /* Return the directory from which the translation unit was initiated,
206 in case set_src_pwd() was not called before to assign it a
222 /* Called when the start of a function definition is parsed,
223 this function prints on stderr the name of the function. */
225 announce_function (tree decl
)
229 if (rtl_dump_and_exit
)
230 fprintf (stderr
, "%s ",
231 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
233 fprintf (stderr
, " %s",
234 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
236 pp_needs_newline (global_dc
->printer
) = true;
237 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
241 /* Initialize local_tick with the time of day, or -1 if
242 flag_random_seed is set. */
245 init_local_tick (void)
247 if (!flag_random_seed
)
249 #ifdef HAVE_GETTIMEOFDAY
253 gettimeofday (&tv
, NULL
);
254 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
258 time_t now
= time (NULL
);
260 if (now
!= (time_t)-1)
261 local_tick
= (unsigned) now
;
269 /* Obtain the random_seed. Unless NOINIT, initialize it if
270 it's not provided in the command line. */
273 get_random_seed (bool noinit
)
275 if (!random_seed
&& !noinit
)
277 int fd
= open ("/dev/urandom", O_RDONLY
);
280 if (read (fd
, &random_seed
, sizeof (random_seed
))
281 != sizeof (random_seed
))
286 random_seed
= local_tick
^ getpid ();
291 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */
294 set_random_seed (const char *val
)
296 flag_random_seed
= val
;
297 if (flag_random_seed
)
301 /* When the driver passed in a hex number don't crc it again */
302 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
303 if (!(endp
> flag_random_seed
&& *endp
== 0))
304 random_seed
= crc32_string (0, flag_random_seed
);
308 /* Handler for fatal signals, such as SIGSEGV. These are transformed
309 into ICE messages, which is much more user friendly. In case the
310 error printer crashes, reset the signal to prevent infinite recursion. */
313 crash_signal (int signo
)
315 signal (signo
, SIG_DFL
);
317 /* If we crashed while processing an ASM statement, then be a little more
318 graceful. It's most likely the user's fault. */
319 if (this_is_asm_operands
)
321 output_operand_lossage ("unrecoverable error");
322 exit (FATAL_EXIT_CODE
);
325 internal_error ("%s", strsignal (signo
));
328 /* A subroutine of wrapup_global_declarations. We've come to the end of
329 the compilation unit. All deferred variables should be undeferred,
330 and all incomplete decls should be finalized. */
333 wrapup_global_declaration_1 (tree decl
)
335 /* We're not deferring this any longer. Assignment is conditional to
336 avoid needlessly dirtying PCH pages. */
337 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
338 && DECL_DEFER_OUTPUT (decl
) != 0)
339 DECL_DEFER_OUTPUT (decl
) = 0;
341 if (VAR_P (decl
) && DECL_SIZE (decl
) == 0)
342 lang_hooks
.finish_incomplete_decl (decl
);
345 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
346 needs to be output. Return true if it is output. */
349 wrapup_global_declaration_2 (tree decl
)
351 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
352 || (VAR_P (decl
) && DECL_HAS_VALUE_EXPR_P (decl
)))
355 /* Don't write out static consts, unless we still need them.
357 We also keep static consts if not optimizing (for debugging),
358 unless the user specified -fno-keep-static-consts.
359 ??? They might be better written into the debug information.
360 This is possible when using DWARF.
362 A language processor that wants static constants to be always
363 written out (even if it is not used) is responsible for
364 calling rest_of_decl_compilation itself. E.g. the C front-end
365 calls rest_of_decl_compilation from finish_decl.
366 One motivation for this is that is conventional in some
367 environments to write things like:
368 static const char rcsid[] = "... version string ...";
369 intending to force the string to be in the executable.
371 A language processor that would prefer to have unneeded
372 static constants "optimized away" would just defer writing
373 them out until here. E.g. C++ does this, because static
374 constants are often defined in header files.
376 ??? A tempting alternative (for both C and C++) would be
377 to force a constant to be written if and only if it is
378 defined in a main file, as opposed to an include file. */
380 if (VAR_P (decl
) && TREE_STATIC (decl
))
384 node
= varpool_node::get (decl
);
386 if (!node
&& flag_ltrans
)
388 else if (node
&& node
->definition
)
390 else if (node
&& node
->alias
)
392 else if (!symtab
->global_info_ready
394 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
396 else if (node
&& node
->analyzed
)
398 else if (DECL_COMDAT (decl
))
400 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
401 && (optimize
|| !flag_keep_static_consts
402 || DECL_ARTIFICIAL (decl
)))
407 rest_of_decl_compilation (decl
, 1, 1);
415 /* Do any final processing required for the declarations in VEC, of
416 which there are LEN. We write out inline functions and variables
417 that have been deferred until this point, but which are required.
418 Returns nonzero if anything was put out. */
421 wrapup_global_declarations (tree
*vec
, int len
)
423 bool reconsider
, output_something
= false;
426 for (i
= 0; i
< len
; i
++)
427 wrapup_global_declaration_1 (vec
[i
]);
429 /* Now emit any global variables or functions that we have been
430 putting off. We need to loop in case one of the things emitted
431 here references another one which comes earlier in the list. */
435 for (i
= 0; i
< len
; i
++)
436 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
438 output_something
= true;
442 return output_something
;
445 /* Compile an entire translation unit. Write a file of assembly
446 output and various debugging dumps. */
451 timevar_start (TV_PHASE_PARSING
);
452 timevar_push (TV_PARSE_GLOBAL
);
454 /* Parse entire file and generate initial debug information. */
455 lang_hooks
.parse_file ();
457 timevar_pop (TV_PARSE_GLOBAL
);
458 timevar_stop (TV_PHASE_PARSING
);
460 if (flag_dump_locations
)
461 dump_location_info (stderr
);
463 /* Compilation is now finished except for writing
464 what's left of the symbol table output. */
466 if (flag_syntax_only
|| flag_wpa
)
469 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
470 and this shouldn't influence any types built by the middle-end
471 from now on (like gcov_info_type). */
472 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
474 ggc_protect_identifiers
= false;
476 /* Run the actual compilation process. */
479 timevar_start (TV_PHASE_OPT_GEN
);
480 symtab
->finalize_compilation_unit ();
481 timevar_stop (TV_PHASE_OPT_GEN
);
484 /* Perform any post compilation-proper parser cleanups and
485 processing. This is currently only needed for the C++ parser,
486 which can be hopefully cleaned up so this hook is no longer
488 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
489 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
491 optimization_records_finish ();
496 timevar_start (TV_PHASE_LATE_ASM
);
498 /* Compilation unit is finalized. When producing non-fat LTO object, we are
499 basically finished. */
500 if ((in_lto_p
&& flag_incremental_link
!= INCREMENTAL_LINK_LTO
)
501 || !flag_lto
|| flag_fat_lto_objects
)
503 /* File-scope initialization for AddressSanitizer. */
504 if (flag_sanitize
& SANITIZE_ADDRESS
)
507 if (flag_sanitize
& SANITIZE_THREAD
)
514 output_shared_constant_pool ();
515 output_object_blocks ();
516 finish_tm_clone_pairs ();
518 /* Write out any pending weak symbol declarations. */
521 /* This must be at the end before unwind and debug info.
522 Some target ports emit PIC setup thunks here. */
523 targetm
.asm_out
.code_end ();
525 /* Do dbx symbols. */
526 timevar_push (TV_SYMOUT
);
528 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
529 dwarf2out_frame_finish ();
532 (*debug_hooks
->finish
) (main_input_filename
);
533 timevar_pop (TV_SYMOUT
);
535 /* Output some stuff at end of file if nec. */
537 dw2_output_indirect_constants ();
539 /* Flush any pending external directives. */
540 process_pending_assemble_externals ();
543 /* Emit LTO marker if LTO info has been previously emitted. This is
544 used by collect2 to determine whether an object file contains IL.
545 We used to emit an undefined reference here, but this produces
546 link errors if an object file with IL is stored into a shared
547 library without invoking lto1. */
548 if (flag_generate_lto
|| flag_generate_offload
)
550 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
551 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
553 HOST_WIDE_INT_1U
, 8);
554 #elif defined ASM_OUTPUT_ALIGNED_COMMON
555 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
556 HOST_WIDE_INT_1U
, 8);
558 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
564 /* Let linker plugin know that this is a slim object and must be LTOed
565 even when user did not ask for it. */
566 if (flag_generate_lto
&& !flag_fat_lto_objects
)
568 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
569 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
570 HOST_WIDE_INT_1U
, 8);
571 #elif defined ASM_OUTPUT_ALIGNED_COMMON
572 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
573 HOST_WIDE_INT_1U
, 8);
575 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
581 /* Attach a special .ident directive to the end of the file to identify
582 the version of GCC which compiled this code. The format of the .ident
583 string is patterned after the ones produced by native SVR4 compilers. */
586 const char *pkg_version
= "(GNU) ";
589 if (strcmp ("(GCC) ", pkgversion_string
))
590 pkg_version
= pkgversion_string
;
592 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
593 targetm
.asm_out
.output_ident (ident_str
);
596 /* Auto profile finalization. */
597 if (flag_auto_profile
)
600 /* Invoke registered plugin callbacks. */
601 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
603 /* This must be at the end. Some target ports emit end of file directives
604 into the assembly file here, and hence we can not output anything to the
605 assembly file after this point. */
606 targetm
.asm_out
.file_end ();
608 timevar_stop (TV_PHASE_LATE_ASM
);
611 /* Print version information to FILE.
612 Each line begins with INDENT (for the case where FILE is the
613 assembler output file).
615 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
616 proper and can print pertinent state (e.g. params and plugins).
618 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
619 compiler, and we don't hold the mutex on the compiler's global state:
620 we can't print params and plugins, since they might not be initialized,
621 or might be being manipulated by a compile running in another
625 print_version (FILE *file
, const char *indent
, bool show_global_state
)
627 static const char fmt1
[] =
629 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
631 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
634 static const char fmt2
[] =
635 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n");
636 static const char fmt3
[] =
637 N_("%s%swarning: %s header version %s differs from library version %s.\n");
638 static const char fmt4
[] =
639 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
641 #define __VERSION__ "[?]"
644 file
== stderr
? _(fmt1
) : fmt1
,
645 indent
, *indent
!= 0 ? " " : "",
646 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
647 indent
, __VERSION__
);
649 /* We need to stringify the GMP macro values. Ugh, gmp_version has
650 two string formats, "i.j.k" and "i.j" when k is zero. As of
651 gmp-4.3.0, GMP always uses the 3 number format. */
652 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
653 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
654 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
655 #define GCC_GMP_VERSION \
656 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
657 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
658 #define GCC_GMP_STRINGIFY_VERSION \
659 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
660 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
662 #define GCC_GMP_STRINGIFY_VERSION \
663 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
664 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
665 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
668 file
== stderr
? _(fmt2
) : fmt2
,
669 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
,
676 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
678 file
== stderr
? _(fmt3
) : fmt3
,
679 indent
, *indent
!= 0 ? " " : "",
680 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
681 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
683 file
== stderr
? _(fmt3
) : fmt3
,
684 indent
, *indent
!= 0 ? " " : "",
685 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
686 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
688 file
== stderr
? _(fmt3
) : fmt3
,
689 indent
, *indent
!= 0 ? " " : "",
690 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
692 if (show_global_state
)
695 file
== stderr
? _(fmt4
) : fmt4
,
696 indent
, *indent
!= 0 ? " " : "",
697 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
699 print_plugins_versions (file
, indent
);
704 print_to_asm_out_file (print_switch_type type
, const char * text
)
706 bool prepend_sep
= true;
710 case SWITCH_TYPE_LINE_END
:
711 putc ('\n', asm_out_file
);
714 case SWITCH_TYPE_LINE_START
:
715 fputs (ASM_COMMENT_START
, asm_out_file
);
716 return strlen (ASM_COMMENT_START
);
718 case SWITCH_TYPE_DESCRIPTIVE
:
719 if (ASM_COMMENT_START
[0] == 0)
722 case SWITCH_TYPE_PASSED
:
723 case SWITCH_TYPE_ENABLED
:
725 fputc (' ', asm_out_file
);
726 fputs (text
, asm_out_file
);
727 /* No need to return the length here as
728 print_single_switch has already done it. */
737 print_to_stderr (print_switch_type type
, const char * text
)
741 case SWITCH_TYPE_LINE_END
:
745 case SWITCH_TYPE_LINE_START
:
748 case SWITCH_TYPE_PASSED
:
749 case SWITCH_TYPE_ENABLED
:
753 case SWITCH_TYPE_DESCRIPTIVE
:
754 fputs (text
, stderr
);
755 /* No need to return the length here as
756 print_single_switch has already done it. */
764 /* Print an option value and return the adjusted position in the line.
765 ??? print_fn doesn't handle errors, eg disk full; presumably other
766 code will catch a disk full though. */
769 print_single_switch (print_switch_fn_type print_fn
,
771 print_switch_type type
,
774 /* The ultrix fprintf returns 0 on success, so compute the result
775 we want here since we need it for the following test. The +1
776 is for the separator character that will probably be emitted. */
777 int len
= strlen (text
) + 1;
780 && pos
+ len
> MAX_LINE
)
782 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
787 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
789 print_fn (type
, text
);
793 /* Print active target switches using PRINT_FN.
794 POS is the current cursor position and MAX is the size of a "line".
795 Each line begins with INDENT and ends with TERM.
796 Each switch is separated from the next by SEP. */
799 print_switch_values (print_switch_fn_type print_fn
)
804 /* Print the options as passed. */
805 pos
= print_single_switch (print_fn
, pos
,
806 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
808 for (j
= 1; j
< save_decoded_options_count
; j
++)
810 switch (save_decoded_options
[j
].opt_index
)
823 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
824 save_decoded_options
[j
].orig_option_with_args_text
);
828 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
830 /* Print the -f and -m options that have been enabled.
831 We don't handle language specific options but printing argv
833 pos
= print_single_switch (print_fn
, 0,
834 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
836 for (j
= 0; j
< cl_options_count
; j
++)
837 if (cl_options
[j
].cl_report
838 && option_enabled (j
, &global_options
) > 0)
839 pos
= print_single_switch (print_fn
, pos
,
840 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
842 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
845 /* Open assembly code output file. Do this even if -fsyntax-only is
846 on, because then the driver will have provided the name of a
847 temporary file or bit bucket for us. NAME is the file specified on
848 the command line, possibly NULL. */
850 init_asm_output (const char *name
)
852 if (name
== NULL
&& asm_file_name
== 0)
853 asm_out_file
= stdout
;
856 if (asm_file_name
== 0)
858 int len
= strlen (dump_base_name
);
859 char *dumpname
= XNEWVEC (char, len
+ 6);
861 memcpy (dumpname
, dump_base_name
, len
+ 1);
862 strip_off_ending (dumpname
, len
);
863 strcat (dumpname
, ".s");
864 asm_file_name
= dumpname
;
866 if (!strcmp (asm_file_name
, "-"))
867 asm_out_file
= stdout
;
868 else if (!canonical_filename_eq (asm_file_name
, name
)
869 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
870 asm_out_file
= fopen (asm_file_name
, "w");
872 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
873 line in the current file. */
874 fatal_error (UNKNOWN_LOCATION
,
875 "input file %qs is the same as output file",
877 if (asm_out_file
== 0)
878 fatal_error (UNKNOWN_LOCATION
,
879 "can%'t open %qs for writing: %m", asm_file_name
);
882 if (!flag_syntax_only
)
884 targetm
.asm_out
.file_start ();
886 if (flag_record_gcc_switches
)
888 if (targetm
.asm_out
.record_gcc_switches
)
890 /* Let the target know that we are about to start recording. */
891 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
893 /* Now record the switches. */
894 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
895 /* Let the target know that the recording is over. */
896 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
900 inform (UNKNOWN_LOCATION
,
901 "-frecord-gcc-switches is not supported by "
902 "the current target");
905 if (flag_verbose_asm
)
907 /* Print the list of switches in effect
908 into the assembler file as comments. */
909 print_version (asm_out_file
, ASM_COMMENT_START
, true);
910 print_switch_values (print_to_asm_out_file
);
911 putc ('\n', asm_out_file
);
916 /* A helper function; used as the reallocator function for cpp's line
919 realloc_for_line_map (void *ptr
, size_t len
)
921 return ggc_realloc (ptr
, len
);
924 /* A helper function: used as the allocator function for
925 identifier_to_locale. */
927 alloc_for_identifier_to_locale (size_t len
)
929 return ggc_alloc_atomic (len
);
932 /* Output stack usage information. */
934 output_stack_usage (void)
936 static bool warning_issued
= false;
937 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
938 const char *stack_usage_kind_str
[] = {
943 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
944 enum stack_usage_kind_type stack_usage_kind
;
950 warning (0, "stack usage computation not supported for this target");
951 warning_issued
= true;
956 stack_usage_kind
= STATIC
;
958 /* Add the maximum amount of space pushed onto the stack. */
959 if (maybe_ne (current_function_pushed_stack_size
, 0))
962 if (current_function_pushed_stack_size
.is_constant (&extra
))
964 stack_usage
+= extra
;
965 stack_usage_kind
= DYNAMIC_BOUNDED
;
969 extra
= constant_lower_bound (current_function_pushed_stack_size
);
970 stack_usage
+= extra
;
971 stack_usage_kind
= DYNAMIC
;
975 /* Now on to the tricky part: dynamic stack allocation. */
976 if (current_function_allocates_dynamic_stack_space
)
978 if (stack_usage_kind
!= DYNAMIC
)
980 if (current_function_has_unbounded_dynamic_stack_size
)
981 stack_usage_kind
= DYNAMIC
;
983 stack_usage_kind
= DYNAMIC_BOUNDED
;
986 /* Add the size even in the unbounded case, this can't hurt. */
987 stack_usage
+= current_function_dynamic_stack_size
;
990 if (flag_stack_usage
)
992 expanded_location loc
993 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
994 /* We don't want to print the full qualified name because it can be long,
995 so we strip the scope prefix, but we may need to deal with the suffix
996 created by the compiler. */
998 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1000 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1003 const char *dot
= strchr (name
, '.');
1004 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1007 dot
= strchr (name
, '.');
1012 const char *dot
= strrchr (name
, '.');
1017 fprintf (stack_usage_file
,
1018 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1019 lbasename (loc
.file
),
1024 stack_usage_kind_str
[stack_usage_kind
]);
1027 if (warn_stack_usage
>= 0 && warn_stack_usage
< HOST_WIDE_INT_MAX
)
1029 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1031 if (stack_usage_kind
== DYNAMIC
)
1032 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1033 else if (stack_usage
> warn_stack_usage
)
1035 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1037 OPT_Wstack_usage_
, "stack usage might be %wu bytes",
1040 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wu bytes",
1046 /* Open an auxiliary output file. */
1048 open_auxiliary_file (const char *ext
)
1053 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1054 file
= fopen (filename
, "w");
1056 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1061 /* Alternative diagnostics callback for reentered ICE reporting. */
1064 internal_error_reentered (diagnostic_context
*, const char *, va_list *)
1066 /* Flush the dump file if emergency_dump_function itself caused an ICE. */
1071 /* Auxiliary callback for the diagnostics code. */
1074 internal_error_function (diagnostic_context
*, const char *, va_list *)
1076 global_dc
->internal_error
= internal_error_reentered
;
1078 emergency_dump_function ();
1081 /* Initialization of the front end environment, before command line
1082 options are parsed. Signal handlers, internationalization etc.
1083 ARGV0 is main's argv[0]. */
1085 general_init (const char *argv0
, bool init_signals
)
1089 p
= argv0
+ strlen (argv0
);
1090 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1094 xmalloc_set_program_name (progname
);
1098 /* Unlock the stdio streams. */
1099 unlock_std_streams ();
1101 gcc_init_libintl ();
1103 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1104 identifier_to_locale_free
= ggc_free
;
1106 /* Initialize the diagnostics reporting machinery, so option parsing
1107 can give warnings and errors. */
1108 diagnostic_initialize (global_dc
, N_OPTS
);
1109 /* Set a default printer. Language specific initializations will
1110 override it later. */
1111 tree_diagnostics_defaults (global_dc
);
1113 global_dc
->show_caret
1114 = global_options_init
.x_flag_diagnostics_show_caret
;
1115 global_dc
->show_line_numbers_p
1116 = global_options_init
.x_flag_diagnostics_show_line_numbers
;
1117 global_dc
->show_option_requested
1118 = global_options_init
.x_flag_diagnostics_show_option
;
1119 global_dc
->show_column
1120 = global_options_init
.x_flag_show_column
;
1121 global_dc
->internal_error
= internal_error_function
;
1122 global_dc
->option_enabled
= option_enabled
;
1123 global_dc
->option_state
= &global_options
;
1124 global_dc
->option_name
= option_name
;
1128 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1130 signal (SIGSEGV
, crash_signal
);
1133 signal (SIGILL
, crash_signal
);
1136 signal (SIGBUS
, crash_signal
);
1139 signal (SIGABRT
, crash_signal
);
1141 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1142 signal (SIGIOT
, crash_signal
);
1145 signal (SIGFPE
, crash_signal
);
1148 /* Other host-specific signal setup. */
1149 (*host_hooks
.extra_signals
)();
1152 /* Initialize the garbage-collector, string pools and tree type hash
1156 input_location
= UNKNOWN_LOCATION
;
1157 line_table
= ggc_alloc
<line_maps
> ();
1158 linemap_init (line_table
, BUILTINS_LOCATION
);
1159 line_table
->reallocator
= realloc_for_line_map
;
1160 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1161 line_table
->default_range_bits
= 5;
1164 /* Initialize register usage now so switches may override. */
1167 /* Register the language-independent parameters. */
1168 global_init_params ();
1170 /* This must be done after global_init_params but before argument
1172 init_ggc_heuristics ();
1174 /* Create the singleton holder for global state. This creates the
1176 g
= new gcc::context ();
1178 /* Allow languages and middle-end to register their dumps before the
1179 optimization passes. */
1180 g
->get_dumps ()->register_dumps ();
1182 /* Create the passes. */
1183 g
->set_passes (new gcc::pass_manager (g
));
1185 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1187 statistics_early_init ();
1191 /* Return true if the current target supports -fsection-anchors. */
1194 target_supports_section_anchors_p (void)
1196 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1199 if (targetm
.asm_out
.output_anchor
== NULL
)
1205 /* Parse "N[:M][:...]" into struct align_flags A.
1206 VALUES contains parsed values (in reverse order), all processed
1207 values are popped. */
1210 read_log_maxskip (auto_vec
<unsigned> &values
, align_flags_tuple
*a
)
1212 unsigned n
= values
.pop ();
1214 a
->log
= floor_log2 (n
* 2 - 1);
1216 if (values
.is_empty ())
1217 a
->maxskip
= n
? n
- 1 : 0;
1220 unsigned m
= values
.pop ();
1221 /* -falign-foo=N:M means M-1 max bytes of padding, not M. */
1227 /* Normalize the tuple. */
1231 /* Parse "N[:M[:N2[:M2]]]" string FLAG into a pair of struct align_flags. */
1234 parse_N_M (const char *flag
, align_flags
&a
)
1238 static hash_map
<nofree_string_hash
, align_flags
> cache
;
1239 align_flags
*entry
= cache
.get (flag
);
1246 auto_vec
<unsigned> result_values
;
1247 bool r
= parse_and_check_align_values (flag
, NULL
, result_values
, false,
1252 /* Reverse values for easier manipulation. */
1253 result_values
.reverse ();
1255 read_log_maxskip (result_values
, &a
.levels
[0]);
1256 if (!result_values
.is_empty ())
1257 read_log_maxskip (result_values
, &a
.levels
[1]);
1261 /* N2[:M2] is not specified. This arch has a default for N2.
1262 Before -falign-foo=N:M:N2:M2 was introduced, x86 had a tweak.
1263 -falign-functions=N with N > 8 was adding secondary alignment.
1264 -falign-functions=10 was emitting this before every function:
1267 Now this behavior (and more) can be explicitly requested:
1268 -falign-functions=16:10:8
1269 Retain old behavior if N2 is missing: */
1271 int align
= 1 << a
.levels
[0].log
;
1272 int subalign
= 1 << SUBALIGN_LOG
;
1274 if (a
.levels
[0].log
> SUBALIGN_LOG
1275 && a
.levels
[0].maxskip
>= subalign
- 1)
1277 /* Set N2 unless subalign can never have any effect. */
1278 if (align
> a
.levels
[0].maxskip
+ 1)
1280 a
.levels
[1].log
= SUBALIGN_LOG
;
1281 a
.levels
[1].normalize ();
1287 /* Cache seen value. */
1288 cache
.put (flag
, a
);
1292 /* Process -falign-foo=N[:M[:N2[:M2]]] options. */
1295 parse_alignment_opts (void)
1297 parse_N_M (str_align_loops
, align_loops
);
1298 parse_N_M (str_align_jumps
, align_jumps
);
1299 parse_N_M (str_align_labels
, align_labels
);
1300 parse_N_M (str_align_functions
, align_functions
);
1303 /* Process the options that have been parsed. */
1305 process_options (void)
1307 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1308 This can happen with incorrect pre-processed input. */
1309 debug_hooks
= &do_nothing_debug_hooks
;
1311 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1313 /* Allow the front end to perform consistency checks and do further
1314 initialization based on the command line options. This hook also
1315 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1316 so we can correctly initialize debug output. */
1317 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1319 /* Some machines may reject certain combinations of options. */
1320 location_t saved_location
= input_location
;
1321 input_location
= UNKNOWN_LOCATION
;
1322 targetm
.target_option
.override ();
1323 input_location
= saved_location
;
1325 if (flag_diagnostics_generate_patch
)
1326 global_dc
->edit_context_ptr
= new edit_context ();
1328 /* Avoid any informative notes in the second run of -fcompare-debug. */
1329 if (flag_compare_debug
)
1330 diagnostic_inhibit_notes (global_dc
);
1332 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1334 warning_at (UNKNOWN_LOCATION
, OPT_fsection_anchors
,
1335 "this target does not support %qs",
1336 "-fsection-anchors");
1337 flag_section_anchors
= 0;
1340 if (flag_short_enums
== 2)
1341 flag_short_enums
= targetm
.default_short_enums ();
1343 /* Set aux_base_name if not already set. */
1346 else if (main_input_filename
)
1348 char *name
= xstrdup (lbasename (main_input_filename
));
1350 strip_off_ending (name
, strlen (name
));
1351 aux_base_name
= name
;
1354 aux_base_name
= "gccaux";
1358 || flag_loop_nest_optimize
1359 || flag_graphite_identity
1360 || flag_loop_parallelize_all
)
1361 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1362 "(-fgraphite, -fgraphite-identity, -floop-nest-optimize, "
1363 "-floop-parallelize-all)");
1366 if (flag_cf_protection
!= CF_NONE
1367 && !(flag_cf_protection
& CF_SET
))
1369 if (flag_cf_protection
== CF_FULL
)
1371 error_at (UNKNOWN_LOCATION
,
1372 "%<-fcf-protection=full%> is not supported for this "
1374 flag_cf_protection
= CF_NONE
;
1376 if (flag_cf_protection
== CF_BRANCH
)
1378 error_at (UNKNOWN_LOCATION
,
1379 "%<-fcf-protection=branch%> is not supported for this "
1381 flag_cf_protection
= CF_NONE
;
1383 if (flag_cf_protection
== CF_RETURN
)
1385 error_at (UNKNOWN_LOCATION
,
1386 "%<-fcf-protection=return%> is not supported for this "
1388 flag_cf_protection
= CF_NONE
;
1392 /* One region RA really helps to decrease the code size. */
1393 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1395 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1397 if (!abi_version_at_least (2))
1399 /* -fabi-version=1 support was removed after GCC 4.9. */
1400 error_at (UNKNOWN_LOCATION
,
1401 "%<-fabi-version=1%> is no longer supported");
1402 flag_abi_version
= 2;
1405 /* Unrolling all loops implies that standard loop unrolling must also
1407 if (flag_unroll_all_loops
)
1408 flag_unroll_loops
= 1;
1410 /* web and rename-registers help when run after loop unrolling. */
1411 if (flag_web
== AUTODETECT_VALUE
)
1412 flag_web
= flag_unroll_loops
;
1414 if (flag_rename_registers
== AUTODETECT_VALUE
)
1415 flag_rename_registers
= flag_unroll_loops
;
1417 if (flag_non_call_exceptions
)
1418 flag_asynchronous_unwind_tables
= 1;
1419 if (flag_asynchronous_unwind_tables
)
1420 flag_unwind_tables
= 1;
1422 if (flag_value_profile_transformations
)
1423 flag_profile_values
= 1;
1425 /* Warn about options that are not supported on this machine. */
1426 #ifndef INSN_SCHEDULING
1427 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1428 warning_at (UNKNOWN_LOCATION
, 0,
1429 "instruction scheduling not supported on this target machine");
1431 if (!DELAY_SLOTS
&& flag_delayed_branch
)
1432 warning_at (UNKNOWN_LOCATION
, 0,
1433 "this target machine does not have delayed branches");
1435 user_label_prefix
= USER_LABEL_PREFIX
;
1436 if (flag_leading_underscore
!= -1)
1438 /* If the default prefix is more complicated than "" or "_",
1439 issue a warning and ignore this option. */
1440 if (user_label_prefix
[0] == 0 ||
1441 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1443 user_label_prefix
= flag_leading_underscore
? "_" : "";
1446 warning_at (UNKNOWN_LOCATION
, 0,
1447 "-f%sleading-underscore not supported on this "
1448 "target machine", flag_leading_underscore
? "" : "no-");
1451 /* If we are in verbose mode, write out the version and maybe all the
1452 option flags in use. */
1455 print_version (stderr
, "", true);
1457 print_switch_values (print_to_stderr
);
1460 if (flag_syntax_only
)
1462 write_symbols
= NO_DEBUG
;
1468 if (debug_info_level
== DINFO_LEVEL_NONE
)
1470 debug_info_level
= DINFO_LEVEL_NORMAL
;
1472 if (write_symbols
== NO_DEBUG
)
1473 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1476 debug_info_level
= DINFO_LEVEL_NONE
;
1479 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1481 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1484 error_at (UNKNOWN_LOCATION
,
1485 "could not open final insn dump file %qs: %m",
1486 flag_dump_final_insns
);
1487 flag_dump_final_insns
= NULL
;
1489 else if (fclose (final_output
))
1491 error_at (UNKNOWN_LOCATION
,
1492 "could not close zeroed insn dump file %qs: %m",
1493 flag_dump_final_insns
);
1494 flag_dump_final_insns
= NULL
;
1498 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1500 if (debug_info_level
== DINFO_LEVEL_NONE
)
1501 write_symbols
= NO_DEBUG
;
1503 if (write_symbols
== NO_DEBUG
)
1505 #if defined(DBX_DEBUGGING_INFO)
1506 else if (write_symbols
== DBX_DEBUG
)
1507 debug_hooks
= &dbx_debug_hooks
;
1509 #if defined(XCOFF_DEBUGGING_INFO)
1510 else if (write_symbols
== XCOFF_DEBUG
)
1511 debug_hooks
= &xcoff_debug_hooks
;
1513 #ifdef DWARF2_DEBUGGING_INFO
1514 else if (write_symbols
== DWARF2_DEBUG
)
1515 debug_hooks
= &dwarf2_debug_hooks
;
1517 #ifdef VMS_DEBUGGING_INFO
1518 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1519 debug_hooks
= &vmsdbg_debug_hooks
;
1521 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1522 else if (write_symbols
== DWARF2_DEBUG
)
1523 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1526 error_at (UNKNOWN_LOCATION
,
1527 "target system does not support the %qs debug format",
1528 debug_type_names
[write_symbols
]);
1530 /* We know which debug output will be used so we can set flag_var_tracking
1531 and flag_var_tracking_uninit if the user has not specified them. */
1532 if (debug_info_level
< DINFO_LEVEL_NORMAL
1533 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1535 if (flag_var_tracking
== 1
1536 || flag_var_tracking_uninit
== 1)
1538 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1539 warning_at (UNKNOWN_LOCATION
, 0,
1540 "variable tracking requested, but useless unless "
1541 "producing debug info");
1543 warning_at (UNKNOWN_LOCATION
, 0,
1544 "variable tracking requested, but not supported "
1545 "by this debug format");
1547 flag_var_tracking
= 0;
1548 flag_var_tracking_uninit
= 0;
1551 /* The debug hooks are used to implement -fdump-go-spec because it
1552 gives a simple and stable API for all the information we need to
1554 if (flag_dump_go_spec
!= NULL
)
1555 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1557 /* If the user specifically requested variable tracking with tagging
1558 uninitialized variables, we need to turn on variable tracking.
1559 (We already determined above that variable tracking is feasible.) */
1560 if (flag_var_tracking_uninit
== 1)
1561 flag_var_tracking
= 1;
1563 if (flag_var_tracking
== AUTODETECT_VALUE
)
1564 flag_var_tracking
= optimize
>= 1;
1566 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1567 flag_var_tracking_uninit
= flag_var_tracking
;
1569 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1570 flag_var_tracking_assignments
1571 = (flag_var_tracking
1572 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1574 if (flag_var_tracking_assignments_toggle
)
1575 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1577 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1578 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1580 if (flag_var_tracking_assignments
1581 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1582 warning_at (UNKNOWN_LOCATION
, 0,
1583 "var-tracking-assignments changes selective scheduling");
1585 if (debug_nonbind_markers_p
== AUTODETECT_VALUE
)
1586 debug_nonbind_markers_p
1588 && debug_info_level
>= DINFO_LEVEL_NORMAL
1589 && (write_symbols
== DWARF2_DEBUG
1590 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1591 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1593 if (dwarf2out_as_loc_support
== AUTODETECT_VALUE
)
1594 dwarf2out_as_loc_support
1595 = dwarf2out_default_as_loc_support ();
1596 if (dwarf2out_as_locview_support
== AUTODETECT_VALUE
)
1597 dwarf2out_as_locview_support
1598 = dwarf2out_default_as_locview_support ();
1600 if (debug_variable_location_views
== AUTODETECT_VALUE
)
1602 debug_variable_location_views
1603 = (flag_var_tracking
1604 && debug_info_level
>= DINFO_LEVEL_NORMAL
1605 && (write_symbols
== DWARF2_DEBUG
1606 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1608 && dwarf2out_as_loc_support
1609 && dwarf2out_as_locview_support
);
1611 else if (debug_variable_location_views
== -1 && dwarf_version
!= 5)
1613 warning_at (UNKNOWN_LOCATION
, 0,
1614 "without -gdwarf-5, -gvariable-location-views=incompat5 "
1615 "is equivalent to -gvariable-location-views");
1616 debug_variable_location_views
= 1;
1619 if (debug_internal_reset_location_views
== 2)
1621 debug_internal_reset_location_views
1622 = (debug_variable_location_views
1623 && targetm
.reset_location_view
);
1625 else if (debug_internal_reset_location_views
1626 && !debug_variable_location_views
)
1628 warning_at (UNKNOWN_LOCATION
, 0,
1629 "-ginternal-reset-location-views is forced disabled "
1630 "without -gvariable-location-views");
1631 debug_internal_reset_location_views
= 0;
1634 if (debug_inline_points
== AUTODETECT_VALUE
)
1635 debug_inline_points
= debug_variable_location_views
;
1636 else if (debug_inline_points
&& !debug_nonbind_markers_p
)
1638 warning_at (UNKNOWN_LOCATION
, 0,
1639 "-ginline-points is forced disabled without "
1640 "-gstatement-frontiers");
1641 debug_inline_points
= 0;
1644 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1646 if (HAVE_conditional_move
)
1647 flag_tree_cselim
= 1;
1649 flag_tree_cselim
= 0;
1652 /* If auxiliary info generation is desired, open the output file.
1653 This goes in the same directory as the source file--unlike
1654 all the other output files. */
1655 if (flag_gen_aux_info
)
1657 aux_info_file
= fopen (aux_info_file_name
, "w");
1658 if (aux_info_file
== 0)
1659 fatal_error (UNKNOWN_LOCATION
,
1660 "can%'t open %s: %m", aux_info_file_name
);
1663 if (!targetm_common
.have_named_sections
)
1665 if (flag_function_sections
)
1667 warning_at (UNKNOWN_LOCATION
, 0,
1668 "-ffunction-sections not supported for this target");
1669 flag_function_sections
= 0;
1671 if (flag_data_sections
)
1673 warning_at (UNKNOWN_LOCATION
, 0,
1674 "-fdata-sections not supported for this target");
1675 flag_data_sections
= 0;
1679 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1681 warning_at (UNKNOWN_LOCATION
, 0,
1682 "-fprefetch-loop-arrays not supported for this target");
1683 flag_prefetch_loop_arrays
= 0;
1685 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1687 warning_at (UNKNOWN_LOCATION
, 0,
1688 "-fprefetch-loop-arrays not supported for this target "
1689 "(try -march switches)");
1690 flag_prefetch_loop_arrays
= 0;
1693 /* This combination of options isn't handled for i386 targets and doesn't
1694 make much sense anyway, so don't allow it. */
1695 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1697 warning_at (UNKNOWN_LOCATION
, 0,
1698 "-fprefetch-loop-arrays is not supported with -Os");
1699 flag_prefetch_loop_arrays
= 0;
1702 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1703 if (flag_signaling_nans
)
1704 flag_trapping_math
= 1;
1706 /* We cannot reassociate if we want traps or signed zeros. */
1707 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1709 warning_at (UNKNOWN_LOCATION
, 0,
1710 "-fassociative-math disabled; other options take "
1712 flag_associative_math
= 0;
1715 /* -fstack-clash-protection is not currently supported on targets
1716 where the stack grows up. */
1717 if (flag_stack_clash_protection
&& !STACK_GROWS_DOWNWARD
)
1719 warning_at (UNKNOWN_LOCATION
, 0,
1720 "%<-fstack-clash-protection%> is not supported on targets "
1721 "where the stack grows from lower to higher addresses");
1722 flag_stack_clash_protection
= 0;
1725 /* We can not support -fstack-check= and -fstack-clash-protection at
1727 if (flag_stack_check
!= NO_STACK_CHECK
&& flag_stack_clash_protection
)
1729 warning_at (UNKNOWN_LOCATION
, 0,
1730 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1731 "mutually exclusive. Disabling %<-fstack-check=%>");
1732 flag_stack_check
= NO_STACK_CHECK
;
1735 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1736 if (flag_cx_limited_range
)
1737 flag_complex_method
= 0;
1739 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1740 if (flag_cx_fortran_rules
)
1741 flag_complex_method
= 1;
1743 /* Targets must be able to place spill slots at lower addresses. If the
1744 target already uses a soft frame pointer, the transition is trivial. */
1745 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1747 warning_at (UNKNOWN_LOCATION
, 0,
1748 "-fstack-protector not supported for this target");
1749 flag_stack_protect
= 0;
1751 if (!flag_stack_protect
)
1752 warn_stack_protect
= 0;
1754 /* Address Sanitizer needs porting to each target architecture. */
1756 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1757 && !FRAME_GROWS_DOWNWARD
)
1759 warning_at (UNKNOWN_LOCATION
, 0,
1760 "-fsanitize=address and -fsanitize=kernel-address "
1761 "are not supported for this target");
1762 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1765 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1766 && targetm
.asan_shadow_offset
== NULL
)
1768 warning_at (UNKNOWN_LOCATION
, 0,
1769 "-fsanitize=address not supported for this target");
1770 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1773 /* Do not use IPA optimizations for register allocation if profiler is active
1774 or patchable function entries are inserted for run-time instrumentation
1775 or port does not emit prologue and epilogue as RTL. */
1776 if (profile_flag
|| function_entry_patch_area_size
1777 || !targetm
.have_prologue () || !targetm
.have_epilogue ())
1780 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1781 have not been set. */
1782 if (!global_options_set
.x_warnings_are_errors
1783 && warn_coverage_mismatch
1784 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1786 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1787 DK_ERROR
, UNKNOWN_LOCATION
);
1789 /* Save the current optimization options. */
1790 optimization_default_node
= build_optimization_node (&global_options
);
1791 optimization_current_node
= optimization_default_node
;
1793 /* Please don't change global_options after this point, those changes won't
1794 be reflected in optimization_{default,current}_node. */
1797 /* This function can be called multiple times to reinitialize the compiler
1798 back end when register classes or instruction sets have changed,
1799 before each function. */
1801 backend_init_target (void)
1803 /* This depends on stack_pointer_rtx. */
1804 init_fake_stack_mems ();
1806 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1808 init_alias_target ();
1810 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1814 /* Depends on the enabled attribute. */
1817 /* The following initialization functions need to generate rtl, so
1818 provide a dummy function context for them. */
1819 init_dummy_function_start ();
1821 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1822 on a mode change. */
1824 init_lower_subreg ();
1827 init_expr_target ();
1830 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1831 after a mode change as well. */
1832 caller_save_initialized_p
= false;
1834 expand_dummy_function_end ();
1837 /* Initialize the compiler back end. This function is called only once,
1838 when starting the compiler. */
1845 init_inline_once ();
1846 init_varasm_once ();
1847 save_register_info ();
1849 /* Middle end needs this initialization for default mem attributes
1850 used by early calls to make_decl_rtl. */
1853 /* Middle end needs this initialization for mode tables used to assign
1854 modes to vector variables. */
1858 /* Initialize excess precision settings.
1860 We have no need to modify anything here, just keep track of what the
1861 user requested. We'll figure out any appropriate relaxations
1865 init_excess_precision (void)
1867 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1868 flag_excess_precision
= flag_excess_precision_cmdline
;
1871 /* Initialize things that are both lang-dependent and target-dependent.
1872 This function can be called more than once if target parameters change. */
1874 lang_dependent_init_target (void)
1876 /* This determines excess precision settings. */
1877 init_excess_precision ();
1879 /* This creates various _DECL nodes, so needs to be called after the
1880 front end is initialized. It also depends on the HAVE_xxx macros
1881 generated from the target machine description. */
1884 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1887 /* Perform initializations that are lang-dependent or target-dependent.
1888 but matters only for late optimizations and RTL generation. */
1890 static int rtl_initialized
;
1893 initialize_rtl (void)
1895 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1897 /* Initialization done just once per compilation, but delayed
1898 till code generation. */
1899 if (!rtl_initialized
)
1901 rtl_initialized
= true;
1903 /* Target specific RTL backend initialization. */
1904 if (!this_target_rtl
->target_specific_initialized
)
1906 backend_init_target ();
1907 this_target_rtl
->target_specific_initialized
= true;
1911 /* Language-dependent initialization. Returns nonzero on success. */
1913 lang_dependent_init (const char *name
)
1915 location_t save_loc
= input_location
;
1916 if (dump_base_name
== 0)
1917 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1919 /* Other front-end initialization. */
1920 input_location
= BUILTINS_LOCATION
;
1921 if (lang_hooks
.init () == 0)
1923 input_location
= save_loc
;
1927 init_asm_output (name
);
1929 /* If stack usage information is desired, open the output file. */
1930 if (flag_stack_usage
)
1931 stack_usage_file
= open_auxiliary_file ("su");
1934 /* This creates various _DECL nodes, so needs to be called after the
1935 front end is initialized. */
1938 /* Do the target-specific parts of the initialization. */
1939 lang_dependent_init_target ();
1943 /* If dbx symbol table desired, initialize writing it and output the
1944 predefined types. */
1945 timevar_push (TV_SYMOUT
);
1947 /* Now we have the correct original filename, we can initialize
1949 (*debug_hooks
->init
) (name
);
1951 timevar_pop (TV_SYMOUT
);
1958 /* Reinitialize everything when target parameters, such as register usage,
1961 target_reinit (void)
1963 struct rtl_data saved_x_rtl
;
1964 rtx
*saved_regno_reg_rtx
;
1965 tree saved_optimization_current_node
;
1966 struct target_optabs
*saved_this_fn_optabs
;
1968 /* Temporarily switch to the default optimization node, so that
1969 *this_target_optabs is set to the default, not reflecting
1970 whatever a previous function used for the optimize
1972 saved_optimization_current_node
= optimization_current_node
;
1973 saved_this_fn_optabs
= this_fn_optabs
;
1974 if (saved_optimization_current_node
!= optimization_default_node
)
1976 optimization_current_node
= optimization_default_node
;
1977 cl_optimization_restore
1979 TREE_OPTIMIZATION (optimization_default_node
));
1981 this_fn_optabs
= this_target_optabs
;
1983 /* Save *crtl and regno_reg_rtx around the reinitialization
1984 to allow target_reinit being called even after prepare_function_start. */
1985 saved_regno_reg_rtx
= regno_reg_rtx
;
1986 if (saved_regno_reg_rtx
)
1988 saved_x_rtl
= *crtl
;
1989 memset (crtl
, '\0', sizeof (*crtl
));
1990 regno_reg_rtx
= NULL
;
1993 this_target_rtl
->target_specific_initialized
= false;
1995 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1996 to initialize reg_raw_mode[]. */
1999 /* This invokes target hooks to set fixed_reg[] etc, which is
2003 /* Reinitialize lang-dependent parts. */
2004 lang_dependent_init_target ();
2006 /* Restore the original optimization node. */
2007 if (saved_optimization_current_node
!= optimization_default_node
)
2009 optimization_current_node
= saved_optimization_current_node
;
2010 cl_optimization_restore (&global_options
,
2011 TREE_OPTIMIZATION (optimization_current_node
));
2013 this_fn_optabs
= saved_this_fn_optabs
;
2015 /* Restore regno_reg_rtx at the end, as free_after_compilation from
2016 expand_dummy_function_end clears it. */
2017 if (saved_regno_reg_rtx
)
2019 *crtl
= saved_x_rtl
;
2020 regno_reg_rtx
= saved_regno_reg_rtx
;
2021 saved_regno_reg_rtx
= NULL
;
2026 dump_memory_report (bool final
)
2028 dump_line_table_statistics ();
2029 ggc_print_statistics ();
2030 stringpool_statistics ();
2031 dump_tree_statistics ();
2032 dump_gimple_statistics ();
2033 dump_rtx_statistics ();
2034 dump_alloc_pool_statistics ();
2035 dump_bitmap_statistics ();
2036 dump_hash_table_loc_statistics ();
2037 dump_vec_loc_statistics ();
2038 dump_ggc_loc_statistics (final
);
2039 dump_alias_stats (stderr
);
2040 dump_pta_stats (stderr
);
2043 /* Clean up: close opened files, etc. */
2046 finalize (bool no_backend
)
2048 /* Close the dump files. */
2049 if (flag_gen_aux_info
)
2051 fclose (aux_info_file
);
2052 aux_info_file
= NULL
;
2054 unlink (aux_info_file_name
);
2057 /* Close non-debugging input and output files. Take special care to note
2058 whether fclose returns an error, since the pages might still be on the
2059 buffer chain while the file is open. */
2063 if (ferror (asm_out_file
) != 0)
2064 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
2065 if (fclose (asm_out_file
) != 0)
2066 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
2067 asm_out_file
= NULL
;
2070 if (stack_usage_file
)
2072 fclose (stack_usage_file
);
2073 stack_usage_file
= NULL
;
2077 coverage_remove_note_file ();
2083 g
->get_passes ()->finish_optimization_passes ();
2089 dump_memory_report (true);
2092 dump_profile_report ();
2094 /* Language-specific end of compilation actions. */
2095 lang_hooks
.finish ();
2099 standard_type_bitsize (int bitsize
)
2101 /* As a special exception, we always want __int128 enabled if possible. */
2104 if (bitsize
== CHAR_TYPE_SIZE
2105 || bitsize
== SHORT_TYPE_SIZE
2106 || bitsize
== INT_TYPE_SIZE
2107 || bitsize
== LONG_TYPE_SIZE
2108 || bitsize
== LONG_LONG_TYPE_SIZE
)
2113 /* Initialize the compiler, and compile the input file. */
2119 /* Don't do any more if an error has already occurred. */
2124 timevar_start (TV_PHASE_SETUP
);
2126 optimization_records_start ();
2128 /* This must be run always, because it is needed to compute the FP
2129 predefined macros, such as __LDBL_MAX__, for targets using non
2130 default FP formats. */
2131 init_adjust_machine_modes ();
2132 init_derived_machine_modes ();
2134 /* This must happen after the backend has a chance to process
2135 command line options, but before the parsers are
2137 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2138 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2139 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2140 int_n_enabled_p
[i
] = true;
2142 int_n_enabled_p
[i
] = false;
2144 /* Set up the back-end if requested. */
2148 /* Language-dependent initialization. Returns true on success. */
2149 if (lang_dependent_init (main_input_filename
))
2151 /* Initialize yet another pass. */
2153 ggc_protect_identifiers
= true;
2155 symtab
->initialize ();
2156 init_final (main_input_filename
);
2157 coverage_init (aux_base_name
);
2159 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2161 timevar_stop (TV_PHASE_SETUP
);
2167 timevar_stop (TV_PHASE_SETUP
);
2170 timevar_start (TV_PHASE_FINALIZE
);
2172 finalize (no_backend
);
2174 timevar_stop (TV_PHASE_FINALIZE
);
2178 toplev::toplev (timer
*external_timer
,
2180 : m_use_TV_TOTAL (external_timer
== NULL
),
2181 m_init_signals (init_signals
)
2184 g_timer
= external_timer
;
2189 if (g_timer
&& m_use_TV_TOTAL
)
2191 g_timer
->stop (TV_TOTAL
);
2192 g_timer
->print (stderr
);
2198 /* Potentially call timevar_init (which will create g_timevars if it
2199 doesn't already exist). */
2202 toplev::start_timevars ()
2204 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2207 timevar_start (TV_TOTAL
);
2210 /* Handle -fself-test. */
2213 toplev::run_self_tests ()
2217 error_at (UNKNOWN_LOCATION
, "self-tests incompatible with -E");
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 ();
2230 bitmap_obstack_release (NULL
);
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 /* Convert the options to an array. */
2265 decode_cmdline_options_to_array_default_mask (argc
,
2266 CONST_CAST2 (const char **,
2268 &save_decoded_options
,
2269 &save_decoded_options_count
);
2271 /* Perform language-specific options initialization. */
2272 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2274 /* Parse the options and do minimal processing; basically just
2275 enough to default flags appropriately. */
2276 decode_options (&global_options
, &global_options_set
,
2277 save_decoded_options
, save_decoded_options_count
,
2278 UNKNOWN_LOCATION
, global_dc
,
2279 targetm
.target_option
.override
);
2281 handle_common_deferred_options ();
2285 initialize_plugins ();
2288 print_version (stderr
, "", true);
2291 print_plugins_help (stderr
, "");
2293 /* Exit early if we can (e.g. -help). */
2294 if (!exit_after_options
)
2301 if (warningcount
|| errorcount
|| werrorcount
)
2302 print_ignored_options ();
2307 /* Invoke registered plugin callbacks if any. Some plugins could
2308 emit some diagnostics here. */
2309 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2311 if (flag_diagnostics_generate_patch
)
2313 gcc_assert (global_dc
->edit_context_ptr
);
2316 pp_show_color (&pp
) = pp_show_color (global_dc
->printer
);
2317 global_dc
->edit_context_ptr
->print_diff (&pp
, true);
2321 diagnostic_finish (global_dc
);
2323 finalize_plugins ();
2325 after_memory_report
= true;
2327 if (seen_error () || werrorcount
)
2328 return (FATAL_EXIT_CODE
);
2330 return (SUCCESS_EXIT_CODE
);
2333 /* For those that want to, this function aims to clean up enough state that
2334 you can call toplev::main again. */
2336 toplev::finalize (void)
2338 rtl_initialized
= false;
2339 this_target_rtl
->target_specific_initialized
= false;
2341 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2342 ipa_reference_c_finalize ();
2343 ipa_fnsummary_c_finalize ();
2345 cgraph_c_finalize ();
2346 cgraphunit_c_finalize ();
2347 dwarf2out_c_finalize ();
2349 ipa_cp_c_finalize ();
2350 ira_costs_c_finalize ();
2351 params_c_finalize ();
2353 finalize_options_struct (&global_options
);
2354 finalize_options_struct (&global_options_set
);
2356 /* save_decoded_options uses opts_obstack, so these must
2357 be cleaned up together. */
2358 obstack_free (&opts_obstack
, NULL
);
2359 XDELETEVEC (save_decoded_options
);
2360 save_decoded_options
= NULL
;
2361 save_decoded_options_count
= 0;
2363 /* Clean up the context (and pass_manager etc). */