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 "tree-chkp.h"
81 #include "omp-offload.h"
82 #include "hsa-common.h"
83 #include "edit-context.h"
84 #include "tree-pass.h"
86 #include "ipa-fnsummary.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 ();
494 timevar_start (TV_PHASE_LATE_ASM
);
496 /* Compilation unit is finalized. When producing non-fat LTO object, we are
497 basically finished. */
498 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
500 /* File-scope initialization for AddressSanitizer. */
501 if (flag_sanitize
& SANITIZE_ADDRESS
)
504 if (flag_sanitize
& SANITIZE_THREAD
)
507 if (flag_check_pointer_bounds
)
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)
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 %wd bytes",
1040 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd 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_option_requested
1116 = global_options_init
.x_flag_diagnostics_show_option
;
1117 global_dc
->show_column
1118 = global_options_init
.x_flag_show_column
;
1119 global_dc
->internal_error
= internal_error_function
;
1120 global_dc
->option_enabled
= option_enabled
;
1121 global_dc
->option_state
= &global_options
;
1122 global_dc
->option_name
= option_name
;
1126 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1128 signal (SIGSEGV
, crash_signal
);
1131 signal (SIGILL
, crash_signal
);
1134 signal (SIGBUS
, crash_signal
);
1137 signal (SIGABRT
, crash_signal
);
1139 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1140 signal (SIGIOT
, crash_signal
);
1143 signal (SIGFPE
, crash_signal
);
1146 /* Other host-specific signal setup. */
1147 (*host_hooks
.extra_signals
)();
1150 /* Initialize the garbage-collector, string pools and tree type hash
1154 input_location
= UNKNOWN_LOCATION
;
1155 line_table
= ggc_alloc
<line_maps
> ();
1156 linemap_init (line_table
, BUILTINS_LOCATION
);
1157 line_table
->reallocator
= realloc_for_line_map
;
1158 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1159 line_table
->default_range_bits
= 5;
1162 /* Initialize register usage now so switches may override. */
1165 /* Register the language-independent parameters. */
1166 global_init_params ();
1168 /* This must be done after global_init_params but before argument
1170 init_ggc_heuristics ();
1172 /* Create the singleton holder for global state. This creates the
1174 g
= new gcc::context ();
1176 /* Allow languages and middle-end to register their dumps before the
1177 optimization passes. */
1178 g
->get_dumps ()->register_dumps ();
1180 /* Create the passes. */
1181 g
->set_passes (new gcc::pass_manager (g
));
1183 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1185 statistics_early_init ();
1189 /* Return true if the current target supports -fsection-anchors. */
1192 target_supports_section_anchors_p (void)
1194 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1197 if (targetm
.asm_out
.output_anchor
== NULL
)
1203 /* Default the align_* variables to 1 if they're still unset, and
1204 set up the align_*_log variables. */
1206 init_alignments (void)
1208 if (align_loops
<= 0)
1210 if (align_loops_max_skip
> align_loops
)
1211 align_loops_max_skip
= align_loops
- 1;
1212 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1213 if (align_jumps
<= 0)
1215 if (align_jumps_max_skip
> align_jumps
)
1216 align_jumps_max_skip
= align_jumps
- 1;
1217 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1218 if (align_labels
<= 0)
1220 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1221 if (align_labels_max_skip
> align_labels
)
1222 align_labels_max_skip
= align_labels
- 1;
1223 if (align_functions
<= 0)
1224 align_functions
= 1;
1225 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1228 /* Process the options that have been parsed. */
1230 process_options (void)
1232 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1233 This can happen with incorrect pre-processed input. */
1234 debug_hooks
= &do_nothing_debug_hooks
;
1236 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1238 /* Allow the front end to perform consistency checks and do further
1239 initialization based on the command line options. This hook also
1240 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1241 so we can correctly initialize debug output. */
1242 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1244 /* Some machines may reject certain combinations of options. */
1245 location_t saved_location
= input_location
;
1246 input_location
= UNKNOWN_LOCATION
;
1247 targetm
.target_option
.override ();
1248 input_location
= saved_location
;
1250 if (flag_diagnostics_generate_patch
)
1251 global_dc
->edit_context_ptr
= new edit_context ();
1253 /* Avoid any informative notes in the second run of -fcompare-debug. */
1254 if (flag_compare_debug
)
1255 diagnostic_inhibit_notes (global_dc
);
1257 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1259 warning_at (UNKNOWN_LOCATION
, OPT_fsection_anchors
,
1260 "this target does not support %qs",
1261 "-fsection-anchors");
1262 flag_section_anchors
= 0;
1265 if (flag_short_enums
== 2)
1266 flag_short_enums
= targetm
.default_short_enums ();
1268 /* Set aux_base_name if not already set. */
1271 else if (main_input_filename
)
1273 char *name
= xstrdup (lbasename (main_input_filename
));
1275 strip_off_ending (name
, strlen (name
));
1276 aux_base_name
= name
;
1279 aux_base_name
= "gccaux";
1283 || flag_loop_nest_optimize
1284 || flag_graphite_identity
1285 || flag_loop_parallelize_all
)
1286 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1287 "(-fgraphite, -fgraphite-identity, -floop-nest-optimize, "
1288 "-floop-parallelize-all)");
1291 if (flag_cf_protection
!= CF_NONE
1292 && !(flag_cf_protection
& CF_SET
))
1294 if (flag_cf_protection
== CF_FULL
)
1296 error_at (UNKNOWN_LOCATION
,
1297 "%<-fcf-protection=full%> is not supported for this "
1299 flag_cf_protection
= CF_NONE
;
1301 if (flag_cf_protection
== CF_BRANCH
)
1303 error_at (UNKNOWN_LOCATION
,
1304 "%<-fcf-protection=branch%> is not supported for this "
1306 flag_cf_protection
= CF_NONE
;
1308 if (flag_cf_protection
== CF_RETURN
)
1310 error_at (UNKNOWN_LOCATION
,
1311 "%<-fcf-protection=return%> is not supported for this "
1313 flag_cf_protection
= CF_NONE
;
1317 if (flag_check_pointer_bounds
)
1319 if (targetm
.chkp_bound_mode () == VOIDmode
)
1321 error_at (UNKNOWN_LOCATION
,
1322 "%<-fcheck-pointer-bounds%> is not supported for this "
1324 flag_check_pointer_bounds
= 0;
1327 if (flag_sanitize
& SANITIZE_BOUNDS_STRICT
)
1329 error_at (UNKNOWN_LOCATION
,
1330 "%<-fcheck-pointer-bounds%> is not supported with "
1331 "%<-fsanitize=bounds-strict%>");
1332 flag_check_pointer_bounds
= 0;
1334 else if (flag_sanitize
& SANITIZE_BOUNDS
)
1336 error_at (UNKNOWN_LOCATION
,
1337 "%<-fcheck-pointer-bounds%> is not supported with "
1338 "%<-fsanitize=bounds%>");
1339 flag_check_pointer_bounds
= 0;
1342 if (flag_sanitize
& SANITIZE_ADDRESS
)
1344 error_at (UNKNOWN_LOCATION
,
1345 "%<-fcheck-pointer-bounds%> is not supported with "
1346 "Address Sanitizer");
1347 flag_check_pointer_bounds
= 0;
1350 if (flag_sanitize
& SANITIZE_THREAD
)
1352 error_at (UNKNOWN_LOCATION
,
1353 "%<-fcheck-pointer-bounds%> is not supported with "
1354 "Thread Sanitizer");
1356 flag_check_pointer_bounds
= 0;
1360 /* One region RA really helps to decrease the code size. */
1361 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1363 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1365 if (!abi_version_at_least (2))
1367 /* -fabi-version=1 support was removed after GCC 4.9. */
1368 error_at (UNKNOWN_LOCATION
,
1369 "%<-fabi-version=1%> is no longer supported");
1370 flag_abi_version
= 2;
1373 /* Unrolling all loops implies that standard loop unrolling must also
1375 if (flag_unroll_all_loops
)
1376 flag_unroll_loops
= 1;
1378 /* web and rename-registers help when run after loop unrolling. */
1379 if (flag_web
== AUTODETECT_VALUE
)
1380 flag_web
= flag_unroll_loops
;
1382 if (flag_rename_registers
== AUTODETECT_VALUE
)
1383 flag_rename_registers
= flag_unroll_loops
;
1385 if (flag_non_call_exceptions
)
1386 flag_asynchronous_unwind_tables
= 1;
1387 if (flag_asynchronous_unwind_tables
)
1388 flag_unwind_tables
= 1;
1390 if (flag_value_profile_transformations
)
1391 flag_profile_values
= 1;
1393 /* Warn about options that are not supported on this machine. */
1394 #ifndef INSN_SCHEDULING
1395 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1396 warning_at (UNKNOWN_LOCATION
, 0,
1397 "instruction scheduling not supported on this target machine");
1399 if (!DELAY_SLOTS
&& flag_delayed_branch
)
1400 warning_at (UNKNOWN_LOCATION
, 0,
1401 "this target machine does not have delayed branches");
1403 user_label_prefix
= USER_LABEL_PREFIX
;
1404 if (flag_leading_underscore
!= -1)
1406 /* If the default prefix is more complicated than "" or "_",
1407 issue a warning and ignore this option. */
1408 if (user_label_prefix
[0] == 0 ||
1409 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1411 user_label_prefix
= flag_leading_underscore
? "_" : "";
1414 warning_at (UNKNOWN_LOCATION
, 0,
1415 "-f%sleading-underscore not supported on this "
1416 "target machine", flag_leading_underscore
? "" : "no-");
1419 /* If we are in verbose mode, write out the version and maybe all the
1420 option flags in use. */
1423 print_version (stderr
, "", true);
1425 print_switch_values (print_to_stderr
);
1428 if (flag_syntax_only
)
1430 write_symbols
= NO_DEBUG
;
1436 if (debug_info_level
== DINFO_LEVEL_NONE
)
1438 debug_info_level
= DINFO_LEVEL_NORMAL
;
1440 if (write_symbols
== NO_DEBUG
)
1441 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1444 debug_info_level
= DINFO_LEVEL_NONE
;
1447 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1449 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1452 error_at (UNKNOWN_LOCATION
,
1453 "could not open final insn dump file %qs: %m",
1454 flag_dump_final_insns
);
1455 flag_dump_final_insns
= NULL
;
1457 else if (fclose (final_output
))
1459 error_at (UNKNOWN_LOCATION
,
1460 "could not close zeroed insn dump file %qs: %m",
1461 flag_dump_final_insns
);
1462 flag_dump_final_insns
= NULL
;
1466 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1468 if (debug_info_level
== DINFO_LEVEL_NONE
)
1469 write_symbols
= NO_DEBUG
;
1471 if (write_symbols
== NO_DEBUG
)
1473 #if defined(DBX_DEBUGGING_INFO)
1474 else if (write_symbols
== DBX_DEBUG
)
1475 debug_hooks
= &dbx_debug_hooks
;
1477 #if defined(XCOFF_DEBUGGING_INFO)
1478 else if (write_symbols
== XCOFF_DEBUG
)
1479 debug_hooks
= &xcoff_debug_hooks
;
1481 #ifdef DWARF2_DEBUGGING_INFO
1482 else if (write_symbols
== DWARF2_DEBUG
)
1483 debug_hooks
= &dwarf2_debug_hooks
;
1485 #ifdef VMS_DEBUGGING_INFO
1486 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1487 debug_hooks
= &vmsdbg_debug_hooks
;
1489 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1490 else if (write_symbols
== DWARF2_DEBUG
)
1491 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1494 error_at (UNKNOWN_LOCATION
,
1495 "target system does not support the %qs debug format",
1496 debug_type_names
[write_symbols
]);
1498 /* We know which debug output will be used so we can set flag_var_tracking
1499 and flag_var_tracking_uninit if the user has not specified them. */
1500 if (debug_info_level
< DINFO_LEVEL_NORMAL
1501 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1503 if (flag_var_tracking
== 1
1504 || flag_var_tracking_uninit
== 1)
1506 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1507 warning_at (UNKNOWN_LOCATION
, 0,
1508 "variable tracking requested, but useless unless "
1509 "producing debug info");
1511 warning_at (UNKNOWN_LOCATION
, 0,
1512 "variable tracking requested, but not supported "
1513 "by this debug format");
1515 flag_var_tracking
= 0;
1516 flag_var_tracking_uninit
= 0;
1519 /* The debug hooks are used to implement -fdump-go-spec because it
1520 gives a simple and stable API for all the information we need to
1522 if (flag_dump_go_spec
!= NULL
)
1523 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1525 /* If the user specifically requested variable tracking with tagging
1526 uninitialized variables, we need to turn on variable tracking.
1527 (We already determined above that variable tracking is feasible.) */
1528 if (flag_var_tracking_uninit
== 1)
1529 flag_var_tracking
= 1;
1531 if (flag_var_tracking
== AUTODETECT_VALUE
)
1532 flag_var_tracking
= optimize
>= 1;
1534 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1535 flag_var_tracking_uninit
= flag_var_tracking
;
1537 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1538 flag_var_tracking_assignments
1539 = (flag_var_tracking
1540 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1542 if (flag_var_tracking_assignments_toggle
)
1543 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1545 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1546 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1548 if (flag_var_tracking_assignments
1549 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1550 warning_at (UNKNOWN_LOCATION
, 0,
1551 "var-tracking-assignments changes selective scheduling");
1553 if (debug_nonbind_markers_p
== AUTODETECT_VALUE
)
1554 debug_nonbind_markers_p
1556 && debug_info_level
>= DINFO_LEVEL_NORMAL
1557 && (write_symbols
== DWARF2_DEBUG
1558 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1559 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1561 if (debug_variable_location_views
== AUTODETECT_VALUE
)
1563 debug_variable_location_views
= flag_var_tracking
1564 && debug_info_level
>= DINFO_LEVEL_NORMAL
1565 && (write_symbols
== DWARF2_DEBUG
1566 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1569 else if (debug_variable_location_views
== -1 && dwarf_version
!= 5)
1571 warning_at (UNKNOWN_LOCATION
, 0,
1572 "without -gdwarf-5, -gvariable-location-views=incompat5 "
1573 "is equivalent to -gvariable-location-views");
1574 debug_variable_location_views
= 1;
1577 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1579 if (HAVE_conditional_move
)
1580 flag_tree_cselim
= 1;
1582 flag_tree_cselim
= 0;
1585 /* If auxiliary info generation is desired, open the output file.
1586 This goes in the same directory as the source file--unlike
1587 all the other output files. */
1588 if (flag_gen_aux_info
)
1590 aux_info_file
= fopen (aux_info_file_name
, "w");
1591 if (aux_info_file
== 0)
1592 fatal_error (UNKNOWN_LOCATION
,
1593 "can%'t open %s: %m", aux_info_file_name
);
1596 if (!targetm_common
.have_named_sections
)
1598 if (flag_function_sections
)
1600 warning_at (UNKNOWN_LOCATION
, 0,
1601 "-ffunction-sections not supported for this target");
1602 flag_function_sections
= 0;
1604 if (flag_data_sections
)
1606 warning_at (UNKNOWN_LOCATION
, 0,
1607 "-fdata-sections not supported for this target");
1608 flag_data_sections
= 0;
1612 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1614 warning_at (UNKNOWN_LOCATION
, 0,
1615 "-fprefetch-loop-arrays not supported for this target");
1616 flag_prefetch_loop_arrays
= 0;
1618 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1620 warning_at (UNKNOWN_LOCATION
, 0,
1621 "-fprefetch-loop-arrays not supported for this target "
1622 "(try -march switches)");
1623 flag_prefetch_loop_arrays
= 0;
1626 /* This combination of options isn't handled for i386 targets and doesn't
1627 make much sense anyway, so don't allow it. */
1628 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1630 warning_at (UNKNOWN_LOCATION
, 0,
1631 "-fprefetch-loop-arrays is not supported with -Os");
1632 flag_prefetch_loop_arrays
= 0;
1635 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1636 if (flag_signaling_nans
)
1637 flag_trapping_math
= 1;
1639 /* We cannot reassociate if we want traps or signed zeros. */
1640 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1642 warning_at (UNKNOWN_LOCATION
, 0,
1643 "-fassociative-math disabled; other options take "
1645 flag_associative_math
= 0;
1648 /* -fstack-clash-protection is not currently supported on targets
1649 where the stack grows up. */
1650 if (flag_stack_clash_protection
&& !STACK_GROWS_DOWNWARD
)
1652 warning_at (UNKNOWN_LOCATION
, 0,
1653 "%<-fstack-clash-protection%> is not supported on targets "
1654 "where the stack grows from lower to higher addresses");
1655 flag_stack_clash_protection
= 0;
1658 /* We can not support -fstack-check= and -fstack-clash-protection at
1660 if (flag_stack_check
!= NO_STACK_CHECK
&& flag_stack_clash_protection
)
1662 warning_at (UNKNOWN_LOCATION
, 0,
1663 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1664 "mutually exclusive. Disabling %<-fstack-check=%>");
1665 flag_stack_check
= NO_STACK_CHECK
;
1668 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1669 if (flag_cx_limited_range
)
1670 flag_complex_method
= 0;
1672 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1673 if (flag_cx_fortran_rules
)
1674 flag_complex_method
= 1;
1676 /* Targets must be able to place spill slots at lower addresses. If the
1677 target already uses a soft frame pointer, the transition is trivial. */
1678 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1680 warning_at (UNKNOWN_LOCATION
, 0,
1681 "-fstack-protector not supported for this target");
1682 flag_stack_protect
= 0;
1684 if (!flag_stack_protect
)
1685 warn_stack_protect
= 0;
1687 /* Address Sanitizer needs porting to each target architecture. */
1689 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1690 && !FRAME_GROWS_DOWNWARD
)
1692 warning_at (UNKNOWN_LOCATION
, 0,
1693 "-fsanitize=address and -fsanitize=kernel-address "
1694 "are not supported for this target");
1695 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1698 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1699 && targetm
.asan_shadow_offset
== NULL
)
1701 warning_at (UNKNOWN_LOCATION
, 0,
1702 "-fsanitize=address not supported for this target");
1703 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1706 /* Do not use IPA optimizations for register allocation if profiler is active
1707 or patchable function entries are inserted for run-time instrumentation
1708 or port does not emit prologue and epilogue as RTL. */
1709 if (profile_flag
|| function_entry_patch_area_size
1710 || !targetm
.have_prologue () || !targetm
.have_epilogue ())
1713 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1714 have not been set. */
1715 if (!global_options_set
.x_warnings_are_errors
1716 && warn_coverage_mismatch
1717 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1719 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1720 DK_ERROR
, UNKNOWN_LOCATION
);
1722 /* Save the current optimization options. */
1723 optimization_default_node
= build_optimization_node (&global_options
);
1724 optimization_current_node
= optimization_default_node
;
1726 /* Please don't change global_options after this point, those changes won't
1727 be reflected in optimization_{default,current}_node. */
1730 /* This function can be called multiple times to reinitialize the compiler
1731 back end when register classes or instruction sets have changed,
1732 before each function. */
1734 backend_init_target (void)
1736 /* Initialize alignment variables. */
1739 /* This depends on stack_pointer_rtx. */
1740 init_fake_stack_mems ();
1742 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1744 init_alias_target ();
1746 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1750 /* Depends on the enabled attribute. */
1753 /* The following initialization functions need to generate rtl, so
1754 provide a dummy function context for them. */
1755 init_dummy_function_start ();
1757 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1758 on a mode change. */
1760 init_lower_subreg ();
1763 init_expr_target ();
1766 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1767 after a mode change as well. */
1768 caller_save_initialized_p
= false;
1770 expand_dummy_function_end ();
1773 /* Initialize the compiler back end. This function is called only once,
1774 when starting the compiler. */
1781 init_inline_once ();
1782 init_varasm_once ();
1783 save_register_info ();
1785 /* Middle end needs this initialization for default mem attributes
1786 used by early calls to make_decl_rtl. */
1789 /* Middle end needs this initialization for mode tables used to assign
1790 modes to vector variables. */
1794 /* Initialize excess precision settings.
1796 We have no need to modify anything here, just keep track of what the
1797 user requested. We'll figure out any appropriate relaxations
1801 init_excess_precision (void)
1803 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1804 flag_excess_precision
= flag_excess_precision_cmdline
;
1807 /* Initialize things that are both lang-dependent and target-dependent.
1808 This function can be called more than once if target parameters change. */
1810 lang_dependent_init_target (void)
1812 /* This determines excess precision settings. */
1813 init_excess_precision ();
1815 /* This creates various _DECL nodes, so needs to be called after the
1816 front end is initialized. It also depends on the HAVE_xxx macros
1817 generated from the target machine description. */
1820 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1823 /* Perform initializations that are lang-dependent or target-dependent.
1824 but matters only for late optimizations and RTL generation. */
1826 static int rtl_initialized
;
1829 initialize_rtl (void)
1831 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1833 /* Initialization done just once per compilation, but delayed
1834 till code generation. */
1835 if (!rtl_initialized
)
1837 rtl_initialized
= true;
1839 /* Target specific RTL backend initialization. */
1840 if (!this_target_rtl
->target_specific_initialized
)
1842 backend_init_target ();
1843 this_target_rtl
->target_specific_initialized
= true;
1847 /* Language-dependent initialization. Returns nonzero on success. */
1849 lang_dependent_init (const char *name
)
1851 location_t save_loc
= input_location
;
1852 if (dump_base_name
== 0)
1853 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1855 /* Other front-end initialization. */
1856 input_location
= BUILTINS_LOCATION
;
1857 if (lang_hooks
.init () == 0)
1859 input_location
= save_loc
;
1863 init_asm_output (name
);
1865 /* If stack usage information is desired, open the output file. */
1866 if (flag_stack_usage
)
1867 stack_usage_file
= open_auxiliary_file ("su");
1870 /* This creates various _DECL nodes, so needs to be called after the
1871 front end is initialized. */
1874 /* Do the target-specific parts of the initialization. */
1875 lang_dependent_init_target ();
1879 /* If dbx symbol table desired, initialize writing it and output the
1880 predefined types. */
1881 timevar_push (TV_SYMOUT
);
1883 /* Now we have the correct original filename, we can initialize
1885 (*debug_hooks
->init
) (name
);
1887 timevar_pop (TV_SYMOUT
);
1894 /* Reinitialize everything when target parameters, such as register usage,
1897 target_reinit (void)
1899 struct rtl_data saved_x_rtl
;
1900 rtx
*saved_regno_reg_rtx
;
1901 tree saved_optimization_current_node
;
1902 struct target_optabs
*saved_this_fn_optabs
;
1904 /* Temporarily switch to the default optimization node, so that
1905 *this_target_optabs is set to the default, not reflecting
1906 whatever a previous function used for the optimize
1908 saved_optimization_current_node
= optimization_current_node
;
1909 saved_this_fn_optabs
= this_fn_optabs
;
1910 if (saved_optimization_current_node
!= optimization_default_node
)
1912 optimization_current_node
= optimization_default_node
;
1913 cl_optimization_restore
1915 TREE_OPTIMIZATION (optimization_default_node
));
1917 this_fn_optabs
= this_target_optabs
;
1919 /* Save *crtl and regno_reg_rtx around the reinitialization
1920 to allow target_reinit being called even after prepare_function_start. */
1921 saved_regno_reg_rtx
= regno_reg_rtx
;
1922 if (saved_regno_reg_rtx
)
1924 saved_x_rtl
= *crtl
;
1925 memset (crtl
, '\0', sizeof (*crtl
));
1926 regno_reg_rtx
= NULL
;
1929 this_target_rtl
->target_specific_initialized
= false;
1931 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1932 to initialize reg_raw_mode[]. */
1935 /* This invokes target hooks to set fixed_reg[] etc, which is
1939 /* Reinitialize lang-dependent parts. */
1940 lang_dependent_init_target ();
1942 /* Restore the original optimization node. */
1943 if (saved_optimization_current_node
!= optimization_default_node
)
1945 optimization_current_node
= saved_optimization_current_node
;
1946 cl_optimization_restore (&global_options
,
1947 TREE_OPTIMIZATION (optimization_current_node
));
1949 this_fn_optabs
= saved_this_fn_optabs
;
1951 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1952 expand_dummy_function_end clears it. */
1953 if (saved_regno_reg_rtx
)
1955 *crtl
= saved_x_rtl
;
1956 regno_reg_rtx
= saved_regno_reg_rtx
;
1957 saved_regno_reg_rtx
= NULL
;
1962 dump_memory_report (bool final
)
1964 dump_line_table_statistics ();
1965 ggc_print_statistics ();
1966 stringpool_statistics ();
1967 dump_tree_statistics ();
1968 dump_gimple_statistics ();
1969 dump_rtx_statistics ();
1970 dump_alloc_pool_statistics ();
1971 dump_bitmap_statistics ();
1972 dump_hash_table_loc_statistics ();
1973 dump_vec_loc_statistics ();
1974 dump_ggc_loc_statistics (final
);
1975 dump_alias_stats (stderr
);
1976 dump_pta_stats (stderr
);
1979 /* Clean up: close opened files, etc. */
1982 finalize (bool no_backend
)
1984 /* Close the dump files. */
1985 if (flag_gen_aux_info
)
1987 fclose (aux_info_file
);
1988 aux_info_file
= NULL
;
1990 unlink (aux_info_file_name
);
1993 /* Close non-debugging input and output files. Take special care to note
1994 whether fclose returns an error, since the pages might still be on the
1995 buffer chain while the file is open. */
1999 if (ferror (asm_out_file
) != 0)
2000 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
2001 if (fclose (asm_out_file
) != 0)
2002 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
2003 asm_out_file
= NULL
;
2006 if (stack_usage_file
)
2008 fclose (stack_usage_file
);
2009 stack_usage_file
= NULL
;
2013 coverage_remove_note_file ();
2019 g
->get_passes ()->finish_optimization_passes ();
2025 dump_memory_report (true);
2028 dump_profile_report ();
2030 /* Language-specific end of compilation actions. */
2031 lang_hooks
.finish ();
2035 standard_type_bitsize (int bitsize
)
2037 /* As a special exception, we always want __int128 enabled if possible. */
2040 if (bitsize
== CHAR_TYPE_SIZE
2041 || bitsize
== SHORT_TYPE_SIZE
2042 || bitsize
== INT_TYPE_SIZE
2043 || bitsize
== LONG_TYPE_SIZE
2044 || bitsize
== LONG_LONG_TYPE_SIZE
)
2049 /* Initialize the compiler, and compile the input file. */
2055 /* Don't do any more if an error has already occurred. */
2060 timevar_start (TV_PHASE_SETUP
);
2062 /* This must be run always, because it is needed to compute the FP
2063 predefined macros, such as __LDBL_MAX__, for targets using non
2064 default FP formats. */
2065 init_adjust_machine_modes ();
2066 init_derived_machine_modes ();
2068 /* This must happen after the backend has a chance to process
2069 command line options, but before the parsers are
2071 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2072 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2073 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2074 int_n_enabled_p
[i
] = true;
2076 int_n_enabled_p
[i
] = false;
2078 /* Set up the back-end if requested. */
2082 /* Language-dependent initialization. Returns true on success. */
2083 if (lang_dependent_init (main_input_filename
))
2085 /* Initialize yet another pass. */
2087 ggc_protect_identifiers
= true;
2089 symtab
->initialize ();
2090 init_final (main_input_filename
);
2091 coverage_init (aux_base_name
);
2093 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2095 timevar_stop (TV_PHASE_SETUP
);
2101 timevar_stop (TV_PHASE_SETUP
);
2104 timevar_start (TV_PHASE_FINALIZE
);
2106 finalize (no_backend
);
2108 timevar_stop (TV_PHASE_FINALIZE
);
2112 toplev::toplev (timer
*external_timer
,
2114 : m_use_TV_TOTAL (external_timer
== NULL
),
2115 m_init_signals (init_signals
)
2118 g_timer
= external_timer
;
2123 if (g_timer
&& m_use_TV_TOTAL
)
2125 g_timer
->stop (TV_TOTAL
);
2126 g_timer
->print (stderr
);
2132 /* Potentially call timevar_init (which will create g_timevars if it
2133 doesn't already exist). */
2136 toplev::start_timevars ()
2138 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2141 timevar_start (TV_TOTAL
);
2144 /* Handle -fself-test. */
2147 toplev::run_self_tests ()
2151 error_at (UNKNOWN_LOCATION
, "self-tests incompatible with -E");
2155 /* Reset some state. */
2156 input_location
= UNKNOWN_LOCATION
;
2157 bitmap_obstack_initialize (NULL
);
2159 /* Run the tests; any failures will lead to an abort of the process.
2160 Use "make selftests-gdb" to run under the debugger. */
2161 ::selftest::run_tests ();
2164 bitmap_obstack_release (NULL
);
2166 inform (UNKNOWN_LOCATION
, "self-tests are not enabled in this build");
2167 #endif /* #if CHECKING_P */
2170 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2171 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2172 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2174 It is not safe to call this function more than once. */
2177 toplev::main (int argc
, char **argv
)
2179 /* Parsing and gimplification sometimes need quite large stack.
2180 Increase stack size limits if possible. */
2181 stack_limit_increase (64 * 1024 * 1024);
2183 expandargv (&argc
, &argv
);
2185 /* Initialization of GCC's environment, and diagnostics. */
2186 general_init (argv
[0], m_init_signals
);
2188 /* One-off initialization of options that does not need to be
2189 repeated when options are added for particular functions. */
2190 init_options_once ();
2191 init_opts_obstack ();
2193 /* Initialize global options structures; this must be repeated for
2194 each structure used for parsing options. */
2195 init_options_struct (&global_options
, &global_options_set
);
2196 lang_hooks
.init_options_struct (&global_options
);
2198 /* Convert the options to an array. */
2199 decode_cmdline_options_to_array_default_mask (argc
,
2200 CONST_CAST2 (const char **,
2202 &save_decoded_options
,
2203 &save_decoded_options_count
);
2205 /* Perform language-specific options initialization. */
2206 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2208 /* Parse the options and do minimal processing; basically just
2209 enough to default flags appropriately. */
2210 decode_options (&global_options
, &global_options_set
,
2211 save_decoded_options
, save_decoded_options_count
,
2212 UNKNOWN_LOCATION
, global_dc
,
2213 targetm
.target_option
.override
);
2215 handle_common_deferred_options ();
2219 initialize_plugins ();
2222 print_version (stderr
, "", true);
2225 print_plugins_help (stderr
, "");
2227 /* Exit early if we can (e.g. -help). */
2228 if (!exit_after_options
)
2235 if (warningcount
|| errorcount
|| werrorcount
)
2236 print_ignored_options ();
2241 /* Invoke registered plugin callbacks if any. Some plugins could
2242 emit some diagnostics here. */
2243 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2245 if (flag_diagnostics_generate_patch
)
2247 gcc_assert (global_dc
->edit_context_ptr
);
2250 pp_show_color (&pp
) = pp_show_color (global_dc
->printer
);
2251 global_dc
->edit_context_ptr
->print_diff (&pp
, true);
2255 diagnostic_finish (global_dc
);
2257 finalize_plugins ();
2259 after_memory_report
= true;
2261 if (seen_error () || werrorcount
)
2262 return (FATAL_EXIT_CODE
);
2264 return (SUCCESS_EXIT_CODE
);
2267 /* For those that want to, this function aims to clean up enough state that
2268 you can call toplev::main again. */
2270 toplev::finalize (void)
2272 rtl_initialized
= false;
2273 this_target_rtl
->target_specific_initialized
= false;
2275 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2276 ipa_reference_c_finalize ();
2277 ipa_fnsummary_c_finalize ();
2279 cgraph_c_finalize ();
2280 cgraphunit_c_finalize ();
2281 dwarf2out_c_finalize ();
2283 ipa_cp_c_finalize ();
2284 ira_costs_c_finalize ();
2285 params_c_finalize ();
2287 finalize_options_struct (&global_options
);
2288 finalize_options_struct (&global_options_set
);
2290 /* save_decoded_options uses opts_obstack, so these must
2291 be cleaned up together. */
2292 obstack_free (&opts_obstack
, NULL
);
2293 XDELETEVEC (save_decoded_options
);
2294 save_decoded_options
= NULL
;
2295 save_decoded_options_count
= 0;
2297 /* Clean up the context (and pass_manager etc). */