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"
87 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
91 #ifdef XCOFF_DEBUGGING_INFO
92 #include "xcoffout.h" /* Needed for external data declarations. */
98 #include <isl/version.h>
101 static void general_init (const char *, bool);
102 static void do_compile ();
103 static void process_options (void);
104 static void backend_init (void);
105 static int lang_dependent_init (const char *);
106 static void init_asm_output (const char *);
107 static void finalize (bool);
109 static void crash_signal (int) ATTRIBUTE_NORETURN
;
110 static void compile_file (void);
112 /* True if we don't need a backend (e.g. preprocessing only). */
113 static bool no_backend
;
115 /* Length of line when printing switch values. */
118 /* Decoded options, and number of such options. */
119 struct cl_decoded_option
*save_decoded_options
;
120 unsigned int save_decoded_options_count
;
122 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
123 to optimize in process_options (). */
124 #define AUTODETECT_VALUE 2
126 /* Debug hooks - dependent upon command line options. */
128 const struct gcc_debug_hooks
*debug_hooks
;
130 /* The FUNCTION_DECL for the function currently being compiled,
131 or 0 if between functions. */
132 tree current_function_decl
;
134 /* Set to the FUNC_BEGIN label of the current function, or NULL
136 const char * current_function_func_begin_label
;
138 /* A random sequence of characters, unless overridden by user. */
139 static const char *flag_random_seed
;
141 /* A local time stamp derived from the time of compilation. It will be
142 zero if the system cannot provide a time. It will be -1u, if the
143 user has specified a particular random seed. */
146 /* Random number for this compilation */
147 HOST_WIDE_INT random_seed
;
151 /* When non-NULL, indicates that whenever space is allocated on the
152 stack, the resulting stack pointer must not pass this
153 address---that is, for stacks that grow downward, the stack pointer
154 must always be greater than or equal to this address; for stacks
155 that grow upward, the stack pointer must be less than this address.
156 At present, the rtx may be either a REG or a SYMBOL_REF, although
157 the support provided depends on the backend. */
160 struct target_flag_state default_target_flag_state
;
161 #if SWITCHABLE_TARGET
162 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
164 #define this_target_flag_state (&default_target_flag_state)
167 /* The user symbol prefix after having resolved same. */
168 const char *user_label_prefix
;
170 /* Output files for assembler code (real compiler output)
171 and debugging dumps. */
175 FILE *stack_usage_file
= NULL
;
177 /* The current working directory of a translation. It's generally the
178 directory from which compilation was initiated, but a preprocessed
179 file may specify the original directory in which it was
182 static const char *src_pwd
;
184 /* Initialize src_pwd with the given string, and return true. If it
185 was already initialized, return false. As a special case, it may
186 be called with a NULL argument to test whether src_pwd has NOT been
190 set_src_pwd (const char *pwd
)
194 if (strcmp (src_pwd
, pwd
) == 0)
200 src_pwd
= xstrdup (pwd
);
204 /* Return the directory from which the translation unit was initiated,
205 in case set_src_pwd() was not called before to assign it a
221 /* Called when the start of a function definition is parsed,
222 this function prints on stderr the name of the function. */
224 announce_function (tree decl
)
228 if (rtl_dump_and_exit
)
229 fprintf (stderr
, "%s ",
230 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
232 fprintf (stderr
, " %s",
233 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
235 pp_needs_newline (global_dc
->printer
) = true;
236 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
240 /* Initialize local_tick with the time of day, or -1 if
241 flag_random_seed is set. */
244 init_local_tick (void)
246 if (!flag_random_seed
)
248 #ifdef HAVE_GETTIMEOFDAY
252 gettimeofday (&tv
, NULL
);
253 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
257 time_t now
= time (NULL
);
259 if (now
!= (time_t)-1)
260 local_tick
= (unsigned) now
;
268 /* Obtain the random_seed. Unless NOINIT, initialize it if
269 it's not provided in the command line. */
272 get_random_seed (bool noinit
)
274 if (!random_seed
&& !noinit
)
276 int fd
= open ("/dev/urandom", O_RDONLY
);
279 if (read (fd
, &random_seed
, sizeof (random_seed
))
280 != sizeof (random_seed
))
285 random_seed
= local_tick
^ getpid ();
290 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */
293 set_random_seed (const char *val
)
295 flag_random_seed
= val
;
296 if (flag_random_seed
)
300 /* When the driver passed in a hex number don't crc it again */
301 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
302 if (!(endp
> flag_random_seed
&& *endp
== 0))
303 random_seed
= crc32_string (0, flag_random_seed
);
307 /* Handler for fatal signals, such as SIGSEGV. These are transformed
308 into ICE messages, which is much more user friendly. In case the
309 error printer crashes, reset the signal to prevent infinite recursion. */
312 crash_signal (int signo
)
314 signal (signo
, SIG_DFL
);
316 /* If we crashed while processing an ASM statement, then be a little more
317 graceful. It's most likely the user's fault. */
318 if (this_is_asm_operands
)
320 output_operand_lossage ("unrecoverable error");
321 exit (FATAL_EXIT_CODE
);
324 internal_error ("%s", strsignal (signo
));
327 /* A subroutine of wrapup_global_declarations. We've come to the end of
328 the compilation unit. All deferred variables should be undeferred,
329 and all incomplete decls should be finalized. */
332 wrapup_global_declaration_1 (tree decl
)
334 /* We're not deferring this any longer. Assignment is conditional to
335 avoid needlessly dirtying PCH pages. */
336 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
337 && DECL_DEFER_OUTPUT (decl
) != 0)
338 DECL_DEFER_OUTPUT (decl
) = 0;
340 if (VAR_P (decl
) && DECL_SIZE (decl
) == 0)
341 lang_hooks
.finish_incomplete_decl (decl
);
344 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
345 needs to be output. Return true if it is output. */
348 wrapup_global_declaration_2 (tree decl
)
350 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
351 || (VAR_P (decl
) && DECL_HAS_VALUE_EXPR_P (decl
)))
354 /* Don't write out static consts, unless we still need them.
356 We also keep static consts if not optimizing (for debugging),
357 unless the user specified -fno-keep-static-consts.
358 ??? They might be better written into the debug information.
359 This is possible when using DWARF.
361 A language processor that wants static constants to be always
362 written out (even if it is not used) is responsible for
363 calling rest_of_decl_compilation itself. E.g. the C front-end
364 calls rest_of_decl_compilation from finish_decl.
365 One motivation for this is that is conventional in some
366 environments to write things like:
367 static const char rcsid[] = "... version string ...";
368 intending to force the string to be in the executable.
370 A language processor that would prefer to have unneeded
371 static constants "optimized away" would just defer writing
372 them out until here. E.g. C++ does this, because static
373 constants are often defined in header files.
375 ??? A tempting alternative (for both C and C++) would be
376 to force a constant to be written if and only if it is
377 defined in a main file, as opposed to an include file. */
379 if (VAR_P (decl
) && TREE_STATIC (decl
))
383 node
= varpool_node::get (decl
);
385 if (!node
&& flag_ltrans
)
387 else if (node
&& node
->definition
)
389 else if (node
&& node
->alias
)
391 else if (!symtab
->global_info_ready
393 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
395 else if (node
&& node
->analyzed
)
397 else if (DECL_COMDAT (decl
))
399 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
400 && (optimize
|| !flag_keep_static_consts
401 || DECL_ARTIFICIAL (decl
)))
406 rest_of_decl_compilation (decl
, 1, 1);
414 /* Do any final processing required for the declarations in VEC, of
415 which there are LEN. We write out inline functions and variables
416 that have been deferred until this point, but which are required.
417 Returns nonzero if anything was put out. */
420 wrapup_global_declarations (tree
*vec
, int len
)
422 bool reconsider
, output_something
= false;
425 for (i
= 0; i
< len
; i
++)
426 wrapup_global_declaration_1 (vec
[i
]);
428 /* Now emit any global variables or functions that we have been
429 putting off. We need to loop in case one of the things emitted
430 here references another one which comes earlier in the list. */
434 for (i
= 0; i
< len
; i
++)
435 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
437 output_something
= true;
441 return output_something
;
444 /* Compile an entire translation unit. Write a file of assembly
445 output and various debugging dumps. */
450 timevar_start (TV_PHASE_PARSING
);
451 timevar_push (TV_PARSE_GLOBAL
);
453 /* Parse entire file and generate initial debug information. */
454 lang_hooks
.parse_file ();
456 timevar_pop (TV_PARSE_GLOBAL
);
457 timevar_stop (TV_PHASE_PARSING
);
459 if (flag_dump_locations
)
460 dump_location_info (stderr
);
462 /* Compilation is now finished except for writing
463 what's left of the symbol table output. */
465 if (flag_syntax_only
|| flag_wpa
)
468 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
469 and this shouldn't influence any types built by the middle-end
470 from now on (like gcov_info_type). */
471 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
473 ggc_protect_identifiers
= false;
475 /* Run the actual compilation process. */
478 timevar_start (TV_PHASE_OPT_GEN
);
479 symtab
->finalize_compilation_unit ();
480 timevar_stop (TV_PHASE_OPT_GEN
);
483 /* Perform any post compilation-proper parser cleanups and
484 processing. This is currently only needed for the C++ parser,
485 which can be hopefully cleaned up so this hook is no longer
487 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
488 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
493 timevar_start (TV_PHASE_LATE_ASM
);
495 /* Compilation unit is finalized. When producing non-fat LTO object, we are
496 basically finished. */
497 if ((in_lto_p
&& flag_incremental_link
!= INCREMENTAL_LINK_LTO
)
498 || !flag_lto
|| flag_fat_lto_objects
)
500 /* File-scope initialization for AddressSanitizer. */
501 if (flag_sanitize
& SANITIZE_ADDRESS
)
504 if (flag_sanitize
& SANITIZE_THREAD
)
511 output_shared_constant_pool ();
512 output_object_blocks ();
513 finish_tm_clone_pairs ();
515 /* Write out any pending weak symbol declarations. */
518 /* This must be at the end before unwind and debug info.
519 Some target ports emit PIC setup thunks here. */
520 targetm
.asm_out
.code_end ();
522 /* Do dbx symbols. */
523 timevar_push (TV_SYMOUT
);
525 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
526 dwarf2out_frame_finish ();
529 (*debug_hooks
->finish
) (main_input_filename
);
530 timevar_pop (TV_SYMOUT
);
532 /* Output some stuff at end of file if nec. */
534 dw2_output_indirect_constants ();
536 /* Flush any pending external directives. */
537 process_pending_assemble_externals ();
540 /* Emit LTO marker if LTO info has been previously emitted. This is
541 used by collect2 to determine whether an object file contains IL.
542 We used to emit an undefined reference here, but this produces
543 link errors if an object file with IL is stored into a shared
544 library without invoking lto1. */
545 if (flag_generate_lto
|| flag_generate_offload
)
547 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
548 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
550 HOST_WIDE_INT_1U
, 8);
551 #elif defined ASM_OUTPUT_ALIGNED_COMMON
552 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
553 HOST_WIDE_INT_1U
, 8);
555 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
561 /* Let linker plugin know that this is a slim object and must be LTOed
562 even when user did not ask for it. */
563 if (flag_generate_lto
&& !flag_fat_lto_objects
)
565 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
566 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
567 HOST_WIDE_INT_1U
, 8);
568 #elif defined ASM_OUTPUT_ALIGNED_COMMON
569 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
570 HOST_WIDE_INT_1U
, 8);
572 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
578 /* Attach a special .ident directive to the end of the file to identify
579 the version of GCC which compiled this code. The format of the .ident
580 string is patterned after the ones produced by native SVR4 compilers. */
583 const char *pkg_version
= "(GNU) ";
586 if (strcmp ("(GCC) ", pkgversion_string
))
587 pkg_version
= pkgversion_string
;
589 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
590 targetm
.asm_out
.output_ident (ident_str
);
593 /* Auto profile finalization. */
594 if (flag_auto_profile
)
597 /* Invoke registered plugin callbacks. */
598 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
600 /* This must be at the end. Some target ports emit end of file directives
601 into the assembly file here, and hence we can not output anything to the
602 assembly file after this point. */
603 targetm
.asm_out
.file_end ();
605 timevar_stop (TV_PHASE_LATE_ASM
);
608 /* Print version information to FILE.
609 Each line begins with INDENT (for the case where FILE is the
610 assembler output file).
612 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
613 proper and can print pertinent state (e.g. params and plugins).
615 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
616 compiler, and we don't hold the mutex on the compiler's global state:
617 we can't print params and plugins, since they might not be initialized,
618 or might be being manipulated by a compile running in another
622 print_version (FILE *file
, const char *indent
, bool show_global_state
)
624 static const char fmt1
[] =
626 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
628 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
631 static const char fmt2
[] =
632 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n");
633 static const char fmt3
[] =
634 N_("%s%swarning: %s header version %s differs from library version %s.\n");
635 static const char fmt4
[] =
636 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
638 #define __VERSION__ "[?]"
641 file
== stderr
? _(fmt1
) : fmt1
,
642 indent
, *indent
!= 0 ? " " : "",
643 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
644 indent
, __VERSION__
);
646 /* We need to stringify the GMP macro values. Ugh, gmp_version has
647 two string formats, "i.j.k" and "i.j" when k is zero. As of
648 gmp-4.3.0, GMP always uses the 3 number format. */
649 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
650 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
651 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
652 #define GCC_GMP_VERSION \
653 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
654 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
655 #define GCC_GMP_STRINGIFY_VERSION \
656 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
657 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
659 #define GCC_GMP_STRINGIFY_VERSION \
660 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
661 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
662 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
665 file
== stderr
? _(fmt2
) : fmt2
,
666 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
,
673 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
675 file
== stderr
? _(fmt3
) : fmt3
,
676 indent
, *indent
!= 0 ? " " : "",
677 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
678 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
680 file
== stderr
? _(fmt3
) : fmt3
,
681 indent
, *indent
!= 0 ? " " : "",
682 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
683 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
685 file
== stderr
? _(fmt3
) : fmt3
,
686 indent
, *indent
!= 0 ? " " : "",
687 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
689 if (show_global_state
)
692 file
== stderr
? _(fmt4
) : fmt4
,
693 indent
, *indent
!= 0 ? " " : "",
694 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
696 print_plugins_versions (file
, indent
);
701 print_to_asm_out_file (print_switch_type type
, const char * text
)
703 bool prepend_sep
= true;
707 case SWITCH_TYPE_LINE_END
:
708 putc ('\n', asm_out_file
);
711 case SWITCH_TYPE_LINE_START
:
712 fputs (ASM_COMMENT_START
, asm_out_file
);
713 return strlen (ASM_COMMENT_START
);
715 case SWITCH_TYPE_DESCRIPTIVE
:
716 if (ASM_COMMENT_START
[0] == 0)
719 case SWITCH_TYPE_PASSED
:
720 case SWITCH_TYPE_ENABLED
:
722 fputc (' ', asm_out_file
);
723 fputs (text
, asm_out_file
);
724 /* No need to return the length here as
725 print_single_switch has already done it. */
734 print_to_stderr (print_switch_type type
, const char * text
)
738 case SWITCH_TYPE_LINE_END
:
742 case SWITCH_TYPE_LINE_START
:
745 case SWITCH_TYPE_PASSED
:
746 case SWITCH_TYPE_ENABLED
:
750 case SWITCH_TYPE_DESCRIPTIVE
:
751 fputs (text
, stderr
);
752 /* No need to return the length here as
753 print_single_switch has already done it. */
761 /* Print an option value and return the adjusted position in the line.
762 ??? print_fn doesn't handle errors, eg disk full; presumably other
763 code will catch a disk full though. */
766 print_single_switch (print_switch_fn_type print_fn
,
768 print_switch_type type
,
771 /* The ultrix fprintf returns 0 on success, so compute the result
772 we want here since we need it for the following test. The +1
773 is for the separator character that will probably be emitted. */
774 int len
= strlen (text
) + 1;
777 && pos
+ len
> MAX_LINE
)
779 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
784 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
786 print_fn (type
, text
);
790 /* Print active target switches using PRINT_FN.
791 POS is the current cursor position and MAX is the size of a "line".
792 Each line begins with INDENT and ends with TERM.
793 Each switch is separated from the next by SEP. */
796 print_switch_values (print_switch_fn_type print_fn
)
801 /* Print the options as passed. */
802 pos
= print_single_switch (print_fn
, pos
,
803 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
805 for (j
= 1; j
< save_decoded_options_count
; j
++)
807 switch (save_decoded_options
[j
].opt_index
)
820 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
821 save_decoded_options
[j
].orig_option_with_args_text
);
825 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
827 /* Print the -f and -m options that have been enabled.
828 We don't handle language specific options but printing argv
830 pos
= print_single_switch (print_fn
, 0,
831 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
833 for (j
= 0; j
< cl_options_count
; j
++)
834 if (cl_options
[j
].cl_report
835 && option_enabled (j
, &global_options
) > 0)
836 pos
= print_single_switch (print_fn
, pos
,
837 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
839 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
842 /* Open assembly code output file. Do this even if -fsyntax-only is
843 on, because then the driver will have provided the name of a
844 temporary file or bit bucket for us. NAME is the file specified on
845 the command line, possibly NULL. */
847 init_asm_output (const char *name
)
849 if (name
== NULL
&& asm_file_name
== 0)
850 asm_out_file
= stdout
;
853 if (asm_file_name
== 0)
855 int len
= strlen (dump_base_name
);
856 char *dumpname
= XNEWVEC (char, len
+ 6);
858 memcpy (dumpname
, dump_base_name
, len
+ 1);
859 strip_off_ending (dumpname
, len
);
860 strcat (dumpname
, ".s");
861 asm_file_name
= dumpname
;
863 if (!strcmp (asm_file_name
, "-"))
864 asm_out_file
= stdout
;
865 else if (!canonical_filename_eq (asm_file_name
, name
)
866 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
867 asm_out_file
= fopen (asm_file_name
, "w");
869 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
870 line in the current file. */
871 fatal_error (UNKNOWN_LOCATION
,
872 "input file %qs is the same as output file",
874 if (asm_out_file
== 0)
875 fatal_error (UNKNOWN_LOCATION
,
876 "can%'t open %qs for writing: %m", asm_file_name
);
879 if (!flag_syntax_only
)
881 targetm
.asm_out
.file_start ();
883 if (flag_record_gcc_switches
)
885 if (targetm
.asm_out
.record_gcc_switches
)
887 /* Let the target know that we are about to start recording. */
888 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
890 /* Now record the switches. */
891 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
892 /* Let the target know that the recording is over. */
893 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
897 inform (UNKNOWN_LOCATION
,
898 "-frecord-gcc-switches is not supported by "
899 "the current target");
902 if (flag_verbose_asm
)
904 /* Print the list of switches in effect
905 into the assembler file as comments. */
906 print_version (asm_out_file
, ASM_COMMENT_START
, true);
907 print_switch_values (print_to_asm_out_file
);
908 putc ('\n', asm_out_file
);
913 /* A helper function; used as the reallocator function for cpp's line
916 realloc_for_line_map (void *ptr
, size_t len
)
918 return ggc_realloc (ptr
, len
);
921 /* A helper function: used as the allocator function for
922 identifier_to_locale. */
924 alloc_for_identifier_to_locale (size_t len
)
926 return ggc_alloc_atomic (len
);
929 /* Output stack usage information. */
931 output_stack_usage (void)
933 static bool warning_issued
= false;
934 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
935 const char *stack_usage_kind_str
[] = {
940 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
941 enum stack_usage_kind_type stack_usage_kind
;
947 warning (0, "stack usage computation not supported for this target");
948 warning_issued
= true;
953 stack_usage_kind
= STATIC
;
955 /* Add the maximum amount of space pushed onto the stack. */
956 if (maybe_ne (current_function_pushed_stack_size
, 0))
959 if (current_function_pushed_stack_size
.is_constant (&extra
))
961 stack_usage
+= extra
;
962 stack_usage_kind
= DYNAMIC_BOUNDED
;
966 extra
= constant_lower_bound (current_function_pushed_stack_size
);
967 stack_usage
+= extra
;
968 stack_usage_kind
= DYNAMIC
;
972 /* Now on to the tricky part: dynamic stack allocation. */
973 if (current_function_allocates_dynamic_stack_space
)
975 if (stack_usage_kind
!= DYNAMIC
)
977 if (current_function_has_unbounded_dynamic_stack_size
)
978 stack_usage_kind
= DYNAMIC
;
980 stack_usage_kind
= DYNAMIC_BOUNDED
;
983 /* Add the size even in the unbounded case, this can't hurt. */
984 stack_usage
+= current_function_dynamic_stack_size
;
987 if (flag_stack_usage
)
989 expanded_location loc
990 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
991 /* We don't want to print the full qualified name because it can be long,
992 so we strip the scope prefix, but we may need to deal with the suffix
993 created by the compiler. */
995 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
997 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1000 const char *dot
= strchr (name
, '.');
1001 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1004 dot
= strchr (name
, '.');
1009 const char *dot
= strrchr (name
, '.');
1014 fprintf (stack_usage_file
,
1015 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1016 lbasename (loc
.file
),
1021 stack_usage_kind_str
[stack_usage_kind
]);
1024 if (warn_stack_usage
>= 0)
1026 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1028 if (stack_usage_kind
== DYNAMIC
)
1029 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1030 else if (stack_usage
> warn_stack_usage
)
1032 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1034 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1037 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1043 /* Open an auxiliary output file. */
1045 open_auxiliary_file (const char *ext
)
1050 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1051 file
= fopen (filename
, "w");
1053 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1058 /* Alternative diagnostics callback for reentered ICE reporting. */
1061 internal_error_reentered (diagnostic_context
*, const char *, va_list *)
1063 /* Flush the dump file if emergency_dump_function itself caused an ICE. */
1068 /* Auxiliary callback for the diagnostics code. */
1071 internal_error_function (diagnostic_context
*, const char *, va_list *)
1073 global_dc
->internal_error
= internal_error_reentered
;
1075 emergency_dump_function ();
1078 /* Initialization of the front end environment, before command line
1079 options are parsed. Signal handlers, internationalization etc.
1080 ARGV0 is main's argv[0]. */
1082 general_init (const char *argv0
, bool init_signals
)
1086 p
= argv0
+ strlen (argv0
);
1087 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1091 xmalloc_set_program_name (progname
);
1095 /* Unlock the stdio streams. */
1096 unlock_std_streams ();
1098 gcc_init_libintl ();
1100 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1101 identifier_to_locale_free
= ggc_free
;
1103 /* Initialize the diagnostics reporting machinery, so option parsing
1104 can give warnings and errors. */
1105 diagnostic_initialize (global_dc
, N_OPTS
);
1106 /* Set a default printer. Language specific initializations will
1107 override it later. */
1108 tree_diagnostics_defaults (global_dc
);
1110 global_dc
->show_caret
1111 = global_options_init
.x_flag_diagnostics_show_caret
;
1112 global_dc
->show_option_requested
1113 = global_options_init
.x_flag_diagnostics_show_option
;
1114 global_dc
->show_column
1115 = global_options_init
.x_flag_show_column
;
1116 global_dc
->internal_error
= internal_error_function
;
1117 global_dc
->option_enabled
= option_enabled
;
1118 global_dc
->option_state
= &global_options
;
1119 global_dc
->option_name
= option_name
;
1123 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1125 signal (SIGSEGV
, crash_signal
);
1128 signal (SIGILL
, crash_signal
);
1131 signal (SIGBUS
, crash_signal
);
1134 signal (SIGABRT
, crash_signal
);
1136 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1137 signal (SIGIOT
, crash_signal
);
1140 signal (SIGFPE
, crash_signal
);
1143 /* Other host-specific signal setup. */
1144 (*host_hooks
.extra_signals
)();
1147 /* Initialize the garbage-collector, string pools and tree type hash
1151 input_location
= UNKNOWN_LOCATION
;
1152 line_table
= ggc_alloc
<line_maps
> ();
1153 linemap_init (line_table
, BUILTINS_LOCATION
);
1154 line_table
->reallocator
= realloc_for_line_map
;
1155 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1156 line_table
->default_range_bits
= 5;
1159 /* Initialize register usage now so switches may override. */
1162 /* Register the language-independent parameters. */
1163 global_init_params ();
1165 /* This must be done after global_init_params but before argument
1167 init_ggc_heuristics ();
1169 /* Create the singleton holder for global state. This creates the
1171 g
= new gcc::context ();
1173 /* Allow languages and middle-end to register their dumps before the
1174 optimization passes. */
1175 g
->get_dumps ()->register_dumps ();
1177 /* Create the passes. */
1178 g
->set_passes (new gcc::pass_manager (g
));
1180 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1182 statistics_early_init ();
1186 /* Return true if the current target supports -fsection-anchors. */
1189 target_supports_section_anchors_p (void)
1191 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1194 if (targetm
.asm_out
.output_anchor
== NULL
)
1200 /* Default the align_* variables to 1 if they're still unset, and
1201 set up the align_*_log variables. */
1203 init_alignments (void)
1205 if (align_loops
<= 0)
1207 if (align_loops_max_skip
> align_loops
)
1208 align_loops_max_skip
= align_loops
- 1;
1209 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1210 if (align_jumps
<= 0)
1212 if (align_jumps_max_skip
> align_jumps
)
1213 align_jumps_max_skip
= align_jumps
- 1;
1214 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1215 if (align_labels
<= 0)
1217 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1218 if (align_labels_max_skip
> align_labels
)
1219 align_labels_max_skip
= align_labels
- 1;
1220 if (align_functions
<= 0)
1221 align_functions
= 1;
1222 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1225 /* Process the options that have been parsed. */
1227 process_options (void)
1229 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1230 This can happen with incorrect pre-processed input. */
1231 debug_hooks
= &do_nothing_debug_hooks
;
1233 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1235 /* Allow the front end to perform consistency checks and do further
1236 initialization based on the command line options. This hook also
1237 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1238 so we can correctly initialize debug output. */
1239 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1241 /* Some machines may reject certain combinations of options. */
1242 location_t saved_location
= input_location
;
1243 input_location
= UNKNOWN_LOCATION
;
1244 targetm
.target_option
.override ();
1245 input_location
= saved_location
;
1247 if (flag_diagnostics_generate_patch
)
1248 global_dc
->edit_context_ptr
= new edit_context ();
1250 /* Avoid any informative notes in the second run of -fcompare-debug. */
1251 if (flag_compare_debug
)
1252 diagnostic_inhibit_notes (global_dc
);
1254 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1256 warning_at (UNKNOWN_LOCATION
, OPT_fsection_anchors
,
1257 "this target does not support %qs",
1258 "-fsection-anchors");
1259 flag_section_anchors
= 0;
1262 if (flag_short_enums
== 2)
1263 flag_short_enums
= targetm
.default_short_enums ();
1265 /* Set aux_base_name if not already set. */
1268 else if (main_input_filename
)
1270 char *name
= xstrdup (lbasename (main_input_filename
));
1272 strip_off_ending (name
, strlen (name
));
1273 aux_base_name
= name
;
1276 aux_base_name
= "gccaux";
1280 || flag_loop_nest_optimize
1281 || flag_graphite_identity
1282 || flag_loop_parallelize_all
)
1283 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1284 "(-fgraphite, -fgraphite-identity, -floop-nest-optimize, "
1285 "-floop-parallelize-all)");
1288 if (flag_cf_protection
!= CF_NONE
1289 && !(flag_cf_protection
& CF_SET
))
1291 if (flag_cf_protection
== CF_FULL
)
1293 error_at (UNKNOWN_LOCATION
,
1294 "%<-fcf-protection=full%> is not supported for this "
1296 flag_cf_protection
= CF_NONE
;
1298 if (flag_cf_protection
== CF_BRANCH
)
1300 error_at (UNKNOWN_LOCATION
,
1301 "%<-fcf-protection=branch%> is not supported for this "
1303 flag_cf_protection
= CF_NONE
;
1305 if (flag_cf_protection
== CF_RETURN
)
1307 error_at (UNKNOWN_LOCATION
,
1308 "%<-fcf-protection=return%> is not supported for this "
1310 flag_cf_protection
= CF_NONE
;
1314 /* One region RA really helps to decrease the code size. */
1315 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1317 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1319 if (!abi_version_at_least (2))
1321 /* -fabi-version=1 support was removed after GCC 4.9. */
1322 error_at (UNKNOWN_LOCATION
,
1323 "%<-fabi-version=1%> is no longer supported");
1324 flag_abi_version
= 2;
1327 /* Unrolling all loops implies that standard loop unrolling must also
1329 if (flag_unroll_all_loops
)
1330 flag_unroll_loops
= 1;
1332 /* web and rename-registers help when run after loop unrolling. */
1333 if (flag_web
== AUTODETECT_VALUE
)
1334 flag_web
= flag_unroll_loops
;
1336 if (flag_rename_registers
== AUTODETECT_VALUE
)
1337 flag_rename_registers
= flag_unroll_loops
;
1339 if (flag_non_call_exceptions
)
1340 flag_asynchronous_unwind_tables
= 1;
1341 if (flag_asynchronous_unwind_tables
)
1342 flag_unwind_tables
= 1;
1344 if (flag_value_profile_transformations
)
1345 flag_profile_values
= 1;
1347 /* Warn about options that are not supported on this machine. */
1348 #ifndef INSN_SCHEDULING
1349 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1350 warning_at (UNKNOWN_LOCATION
, 0,
1351 "instruction scheduling not supported on this target machine");
1353 if (!DELAY_SLOTS
&& flag_delayed_branch
)
1354 warning_at (UNKNOWN_LOCATION
, 0,
1355 "this target machine does not have delayed branches");
1357 user_label_prefix
= USER_LABEL_PREFIX
;
1358 if (flag_leading_underscore
!= -1)
1360 /* If the default prefix is more complicated than "" or "_",
1361 issue a warning and ignore this option. */
1362 if (user_label_prefix
[0] == 0 ||
1363 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1365 user_label_prefix
= flag_leading_underscore
? "_" : "";
1368 warning_at (UNKNOWN_LOCATION
, 0,
1369 "-f%sleading-underscore not supported on this "
1370 "target machine", flag_leading_underscore
? "" : "no-");
1373 /* If we are in verbose mode, write out the version and maybe all the
1374 option flags in use. */
1377 print_version (stderr
, "", true);
1379 print_switch_values (print_to_stderr
);
1382 if (flag_syntax_only
)
1384 write_symbols
= NO_DEBUG
;
1390 if (debug_info_level
== DINFO_LEVEL_NONE
)
1392 debug_info_level
= DINFO_LEVEL_NORMAL
;
1394 if (write_symbols
== NO_DEBUG
)
1395 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1398 debug_info_level
= DINFO_LEVEL_NONE
;
1401 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1403 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1406 error_at (UNKNOWN_LOCATION
,
1407 "could not open final insn dump file %qs: %m",
1408 flag_dump_final_insns
);
1409 flag_dump_final_insns
= NULL
;
1411 else if (fclose (final_output
))
1413 error_at (UNKNOWN_LOCATION
,
1414 "could not close zeroed insn dump file %qs: %m",
1415 flag_dump_final_insns
);
1416 flag_dump_final_insns
= NULL
;
1420 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1422 if (debug_info_level
== DINFO_LEVEL_NONE
)
1423 write_symbols
= NO_DEBUG
;
1425 if (write_symbols
== NO_DEBUG
)
1427 #if defined(DBX_DEBUGGING_INFO)
1428 else if (write_symbols
== DBX_DEBUG
)
1429 debug_hooks
= &dbx_debug_hooks
;
1431 #if defined(XCOFF_DEBUGGING_INFO)
1432 else if (write_symbols
== XCOFF_DEBUG
)
1433 debug_hooks
= &xcoff_debug_hooks
;
1435 #ifdef DWARF2_DEBUGGING_INFO
1436 else if (write_symbols
== DWARF2_DEBUG
)
1437 debug_hooks
= &dwarf2_debug_hooks
;
1439 #ifdef VMS_DEBUGGING_INFO
1440 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1441 debug_hooks
= &vmsdbg_debug_hooks
;
1443 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1444 else if (write_symbols
== DWARF2_DEBUG
)
1445 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1448 error_at (UNKNOWN_LOCATION
,
1449 "target system does not support the %qs debug format",
1450 debug_type_names
[write_symbols
]);
1452 /* We know which debug output will be used so we can set flag_var_tracking
1453 and flag_var_tracking_uninit if the user has not specified them. */
1454 if (debug_info_level
< DINFO_LEVEL_NORMAL
1455 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1457 if (flag_var_tracking
== 1
1458 || flag_var_tracking_uninit
== 1)
1460 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1461 warning_at (UNKNOWN_LOCATION
, 0,
1462 "variable tracking requested, but useless unless "
1463 "producing debug info");
1465 warning_at (UNKNOWN_LOCATION
, 0,
1466 "variable tracking requested, but not supported "
1467 "by this debug format");
1469 flag_var_tracking
= 0;
1470 flag_var_tracking_uninit
= 0;
1473 /* The debug hooks are used to implement -fdump-go-spec because it
1474 gives a simple and stable API for all the information we need to
1476 if (flag_dump_go_spec
!= NULL
)
1477 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1479 /* If the user specifically requested variable tracking with tagging
1480 uninitialized variables, we need to turn on variable tracking.
1481 (We already determined above that variable tracking is feasible.) */
1482 if (flag_var_tracking_uninit
== 1)
1483 flag_var_tracking
= 1;
1485 if (flag_var_tracking
== AUTODETECT_VALUE
)
1486 flag_var_tracking
= optimize
>= 1;
1488 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1489 flag_var_tracking_uninit
= flag_var_tracking
;
1491 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1492 flag_var_tracking_assignments
1493 = (flag_var_tracking
1494 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1496 if (flag_var_tracking_assignments_toggle
)
1497 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1499 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1500 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1502 if (flag_var_tracking_assignments
1503 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1504 warning_at (UNKNOWN_LOCATION
, 0,
1505 "var-tracking-assignments changes selective scheduling");
1507 if (debug_nonbind_markers_p
== AUTODETECT_VALUE
)
1508 debug_nonbind_markers_p
1510 && debug_info_level
>= DINFO_LEVEL_NORMAL
1511 && (write_symbols
== DWARF2_DEBUG
1512 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1513 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1515 if (dwarf2out_as_loc_support
== AUTODETECT_VALUE
)
1516 dwarf2out_as_loc_support
1517 = dwarf2out_default_as_loc_support ();
1518 if (dwarf2out_as_locview_support
== AUTODETECT_VALUE
)
1519 dwarf2out_as_locview_support
1520 = dwarf2out_default_as_locview_support ();
1522 if (debug_variable_location_views
== AUTODETECT_VALUE
)
1524 debug_variable_location_views
1525 = (flag_var_tracking
1526 && debug_info_level
>= DINFO_LEVEL_NORMAL
1527 && (write_symbols
== DWARF2_DEBUG
1528 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1530 && dwarf2out_as_loc_support
1531 && dwarf2out_as_locview_support
);
1533 else if (debug_variable_location_views
== -1 && dwarf_version
!= 5)
1535 warning_at (UNKNOWN_LOCATION
, 0,
1536 "without -gdwarf-5, -gvariable-location-views=incompat5 "
1537 "is equivalent to -gvariable-location-views");
1538 debug_variable_location_views
= 1;
1541 if (debug_internal_reset_location_views
== 2)
1543 debug_internal_reset_location_views
1544 = (debug_variable_location_views
1545 && targetm
.reset_location_view
);
1547 else if (debug_internal_reset_location_views
1548 && !debug_variable_location_views
)
1550 warning_at (UNKNOWN_LOCATION
, 0,
1551 "-ginternal-reset-location-views is forced disabled "
1552 "without -gvariable-location-views");
1553 debug_internal_reset_location_views
= 0;
1556 if (debug_inline_points
== AUTODETECT_VALUE
)
1557 debug_inline_points
= debug_variable_location_views
;
1558 else if (debug_inline_points
&& !debug_nonbind_markers_p
)
1560 warning_at (UNKNOWN_LOCATION
, 0,
1561 "-ginline-points is forced disabled without "
1562 "-gstatement-frontiers");
1563 debug_inline_points
= 0;
1566 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1568 if (HAVE_conditional_move
)
1569 flag_tree_cselim
= 1;
1571 flag_tree_cselim
= 0;
1574 /* If auxiliary info generation is desired, open the output file.
1575 This goes in the same directory as the source file--unlike
1576 all the other output files. */
1577 if (flag_gen_aux_info
)
1579 aux_info_file
= fopen (aux_info_file_name
, "w");
1580 if (aux_info_file
== 0)
1581 fatal_error (UNKNOWN_LOCATION
,
1582 "can%'t open %s: %m", aux_info_file_name
);
1585 if (!targetm_common
.have_named_sections
)
1587 if (flag_function_sections
)
1589 warning_at (UNKNOWN_LOCATION
, 0,
1590 "-ffunction-sections not supported for this target");
1591 flag_function_sections
= 0;
1593 if (flag_data_sections
)
1595 warning_at (UNKNOWN_LOCATION
, 0,
1596 "-fdata-sections not supported for this target");
1597 flag_data_sections
= 0;
1601 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1603 warning_at (UNKNOWN_LOCATION
, 0,
1604 "-fprefetch-loop-arrays not supported for this target");
1605 flag_prefetch_loop_arrays
= 0;
1607 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1609 warning_at (UNKNOWN_LOCATION
, 0,
1610 "-fprefetch-loop-arrays not supported for this target "
1611 "(try -march switches)");
1612 flag_prefetch_loop_arrays
= 0;
1615 /* This combination of options isn't handled for i386 targets and doesn't
1616 make much sense anyway, so don't allow it. */
1617 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1619 warning_at (UNKNOWN_LOCATION
, 0,
1620 "-fprefetch-loop-arrays is not supported with -Os");
1621 flag_prefetch_loop_arrays
= 0;
1624 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1625 if (flag_signaling_nans
)
1626 flag_trapping_math
= 1;
1628 /* We cannot reassociate if we want traps or signed zeros. */
1629 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1631 warning_at (UNKNOWN_LOCATION
, 0,
1632 "-fassociative-math disabled; other options take "
1634 flag_associative_math
= 0;
1637 /* -fstack-clash-protection is not currently supported on targets
1638 where the stack grows up. */
1639 if (flag_stack_clash_protection
&& !STACK_GROWS_DOWNWARD
)
1641 warning_at (UNKNOWN_LOCATION
, 0,
1642 "%<-fstack-clash-protection%> is not supported on targets "
1643 "where the stack grows from lower to higher addresses");
1644 flag_stack_clash_protection
= 0;
1647 /* We can not support -fstack-check= and -fstack-clash-protection at
1649 if (flag_stack_check
!= NO_STACK_CHECK
&& flag_stack_clash_protection
)
1651 warning_at (UNKNOWN_LOCATION
, 0,
1652 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1653 "mutually exclusive. Disabling %<-fstack-check=%>");
1654 flag_stack_check
= NO_STACK_CHECK
;
1657 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1658 if (flag_cx_limited_range
)
1659 flag_complex_method
= 0;
1661 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1662 if (flag_cx_fortran_rules
)
1663 flag_complex_method
= 1;
1665 /* Targets must be able to place spill slots at lower addresses. If the
1666 target already uses a soft frame pointer, the transition is trivial. */
1667 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1669 warning_at (UNKNOWN_LOCATION
, 0,
1670 "-fstack-protector not supported for this target");
1671 flag_stack_protect
= 0;
1673 if (!flag_stack_protect
)
1674 warn_stack_protect
= 0;
1676 /* Address Sanitizer needs porting to each target architecture. */
1678 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1679 && !FRAME_GROWS_DOWNWARD
)
1681 warning_at (UNKNOWN_LOCATION
, 0,
1682 "-fsanitize=address and -fsanitize=kernel-address "
1683 "are not supported for this target");
1684 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1687 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1688 && targetm
.asan_shadow_offset
== NULL
)
1690 warning_at (UNKNOWN_LOCATION
, 0,
1691 "-fsanitize=address not supported for this target");
1692 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1695 /* Do not use IPA optimizations for register allocation if profiler is active
1696 or patchable function entries are inserted for run-time instrumentation
1697 or port does not emit prologue and epilogue as RTL. */
1698 if (profile_flag
|| function_entry_patch_area_size
1699 || !targetm
.have_prologue () || !targetm
.have_epilogue ())
1702 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1703 have not been set. */
1704 if (!global_options_set
.x_warnings_are_errors
1705 && warn_coverage_mismatch
1706 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1708 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1709 DK_ERROR
, UNKNOWN_LOCATION
);
1711 /* Save the current optimization options. */
1712 optimization_default_node
= build_optimization_node (&global_options
);
1713 optimization_current_node
= optimization_default_node
;
1715 /* Please don't change global_options after this point, those changes won't
1716 be reflected in optimization_{default,current}_node. */
1719 /* This function can be called multiple times to reinitialize the compiler
1720 back end when register classes or instruction sets have changed,
1721 before each function. */
1723 backend_init_target (void)
1725 /* Initialize alignment variables. */
1728 /* This depends on stack_pointer_rtx. */
1729 init_fake_stack_mems ();
1731 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1733 init_alias_target ();
1735 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1739 /* Depends on the enabled attribute. */
1742 /* The following initialization functions need to generate rtl, so
1743 provide a dummy function context for them. */
1744 init_dummy_function_start ();
1746 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1747 on a mode change. */
1749 init_lower_subreg ();
1752 init_expr_target ();
1755 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1756 after a mode change as well. */
1757 caller_save_initialized_p
= false;
1759 expand_dummy_function_end ();
1762 /* Initialize the compiler back end. This function is called only once,
1763 when starting the compiler. */
1770 init_inline_once ();
1771 init_varasm_once ();
1772 save_register_info ();
1774 /* Middle end needs this initialization for default mem attributes
1775 used by early calls to make_decl_rtl. */
1778 /* Middle end needs this initialization for mode tables used to assign
1779 modes to vector variables. */
1783 /* Initialize excess precision settings.
1785 We have no need to modify anything here, just keep track of what the
1786 user requested. We'll figure out any appropriate relaxations
1790 init_excess_precision (void)
1792 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1793 flag_excess_precision
= flag_excess_precision_cmdline
;
1796 /* Initialize things that are both lang-dependent and target-dependent.
1797 This function can be called more than once if target parameters change. */
1799 lang_dependent_init_target (void)
1801 /* This determines excess precision settings. */
1802 init_excess_precision ();
1804 /* This creates various _DECL nodes, so needs to be called after the
1805 front end is initialized. It also depends on the HAVE_xxx macros
1806 generated from the target machine description. */
1809 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1812 /* Perform initializations that are lang-dependent or target-dependent.
1813 but matters only for late optimizations and RTL generation. */
1815 static int rtl_initialized
;
1818 initialize_rtl (void)
1820 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1822 /* Initialization done just once per compilation, but delayed
1823 till code generation. */
1824 if (!rtl_initialized
)
1826 rtl_initialized
= true;
1828 /* Target specific RTL backend initialization. */
1829 if (!this_target_rtl
->target_specific_initialized
)
1831 backend_init_target ();
1832 this_target_rtl
->target_specific_initialized
= true;
1836 /* Language-dependent initialization. Returns nonzero on success. */
1838 lang_dependent_init (const char *name
)
1840 location_t save_loc
= input_location
;
1841 if (dump_base_name
== 0)
1842 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1844 /* Other front-end initialization. */
1845 input_location
= BUILTINS_LOCATION
;
1846 if (lang_hooks
.init () == 0)
1848 input_location
= save_loc
;
1852 init_asm_output (name
);
1854 /* If stack usage information is desired, open the output file. */
1855 if (flag_stack_usage
)
1856 stack_usage_file
= open_auxiliary_file ("su");
1859 /* This creates various _DECL nodes, so needs to be called after the
1860 front end is initialized. */
1863 /* Do the target-specific parts of the initialization. */
1864 lang_dependent_init_target ();
1868 /* If dbx symbol table desired, initialize writing it and output the
1869 predefined types. */
1870 timevar_push (TV_SYMOUT
);
1872 /* Now we have the correct original filename, we can initialize
1874 (*debug_hooks
->init
) (name
);
1876 timevar_pop (TV_SYMOUT
);
1883 /* Reinitialize everything when target parameters, such as register usage,
1886 target_reinit (void)
1888 struct rtl_data saved_x_rtl
;
1889 rtx
*saved_regno_reg_rtx
;
1890 tree saved_optimization_current_node
;
1891 struct target_optabs
*saved_this_fn_optabs
;
1893 /* Temporarily switch to the default optimization node, so that
1894 *this_target_optabs is set to the default, not reflecting
1895 whatever a previous function used for the optimize
1897 saved_optimization_current_node
= optimization_current_node
;
1898 saved_this_fn_optabs
= this_fn_optabs
;
1899 if (saved_optimization_current_node
!= optimization_default_node
)
1901 optimization_current_node
= optimization_default_node
;
1902 cl_optimization_restore
1904 TREE_OPTIMIZATION (optimization_default_node
));
1906 this_fn_optabs
= this_target_optabs
;
1908 /* Save *crtl and regno_reg_rtx around the reinitialization
1909 to allow target_reinit being called even after prepare_function_start. */
1910 saved_regno_reg_rtx
= regno_reg_rtx
;
1911 if (saved_regno_reg_rtx
)
1913 saved_x_rtl
= *crtl
;
1914 memset (crtl
, '\0', sizeof (*crtl
));
1915 regno_reg_rtx
= NULL
;
1918 this_target_rtl
->target_specific_initialized
= false;
1920 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1921 to initialize reg_raw_mode[]. */
1924 /* This invokes target hooks to set fixed_reg[] etc, which is
1928 /* Reinitialize lang-dependent parts. */
1929 lang_dependent_init_target ();
1931 /* Restore the original optimization node. */
1932 if (saved_optimization_current_node
!= optimization_default_node
)
1934 optimization_current_node
= saved_optimization_current_node
;
1935 cl_optimization_restore (&global_options
,
1936 TREE_OPTIMIZATION (optimization_current_node
));
1938 this_fn_optabs
= saved_this_fn_optabs
;
1940 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1941 expand_dummy_function_end clears it. */
1942 if (saved_regno_reg_rtx
)
1944 *crtl
= saved_x_rtl
;
1945 regno_reg_rtx
= saved_regno_reg_rtx
;
1946 saved_regno_reg_rtx
= NULL
;
1951 dump_memory_report (bool final
)
1953 dump_line_table_statistics ();
1954 ggc_print_statistics ();
1955 stringpool_statistics ();
1956 dump_tree_statistics ();
1957 dump_gimple_statistics ();
1958 dump_rtx_statistics ();
1959 dump_alloc_pool_statistics ();
1960 dump_bitmap_statistics ();
1961 dump_hash_table_loc_statistics ();
1962 dump_vec_loc_statistics ();
1963 dump_ggc_loc_statistics (final
);
1964 dump_alias_stats (stderr
);
1965 dump_pta_stats (stderr
);
1968 /* Clean up: close opened files, etc. */
1971 finalize (bool no_backend
)
1973 /* Close the dump files. */
1974 if (flag_gen_aux_info
)
1976 fclose (aux_info_file
);
1977 aux_info_file
= NULL
;
1979 unlink (aux_info_file_name
);
1982 /* Close non-debugging input and output files. Take special care to note
1983 whether fclose returns an error, since the pages might still be on the
1984 buffer chain while the file is open. */
1988 if (ferror (asm_out_file
) != 0)
1989 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
1990 if (fclose (asm_out_file
) != 0)
1991 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
1992 asm_out_file
= NULL
;
1995 if (stack_usage_file
)
1997 fclose (stack_usage_file
);
1998 stack_usage_file
= NULL
;
2002 coverage_remove_note_file ();
2008 g
->get_passes ()->finish_optimization_passes ();
2014 dump_memory_report (true);
2017 dump_profile_report ();
2019 /* Language-specific end of compilation actions. */
2020 lang_hooks
.finish ();
2024 standard_type_bitsize (int bitsize
)
2026 /* As a special exception, we always want __int128 enabled if possible. */
2029 if (bitsize
== CHAR_TYPE_SIZE
2030 || bitsize
== SHORT_TYPE_SIZE
2031 || bitsize
== INT_TYPE_SIZE
2032 || bitsize
== LONG_TYPE_SIZE
2033 || bitsize
== LONG_LONG_TYPE_SIZE
)
2038 /* Initialize the compiler, and compile the input file. */
2044 /* Don't do any more if an error has already occurred. */
2049 timevar_start (TV_PHASE_SETUP
);
2051 /* This must be run always, because it is needed to compute the FP
2052 predefined macros, such as __LDBL_MAX__, for targets using non
2053 default FP formats. */
2054 init_adjust_machine_modes ();
2055 init_derived_machine_modes ();
2057 /* This must happen after the backend has a chance to process
2058 command line options, but before the parsers are
2060 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2061 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2062 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2063 int_n_enabled_p
[i
] = true;
2065 int_n_enabled_p
[i
] = false;
2067 /* Set up the back-end if requested. */
2071 /* Language-dependent initialization. Returns true on success. */
2072 if (lang_dependent_init (main_input_filename
))
2074 /* Initialize yet another pass. */
2076 ggc_protect_identifiers
= true;
2078 symtab
->initialize ();
2079 init_final (main_input_filename
);
2080 coverage_init (aux_base_name
);
2082 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2084 timevar_stop (TV_PHASE_SETUP
);
2090 timevar_stop (TV_PHASE_SETUP
);
2093 timevar_start (TV_PHASE_FINALIZE
);
2095 finalize (no_backend
);
2097 timevar_stop (TV_PHASE_FINALIZE
);
2101 toplev::toplev (timer
*external_timer
,
2103 : m_use_TV_TOTAL (external_timer
== NULL
),
2104 m_init_signals (init_signals
)
2107 g_timer
= external_timer
;
2112 if (g_timer
&& m_use_TV_TOTAL
)
2114 g_timer
->stop (TV_TOTAL
);
2115 g_timer
->print (stderr
);
2121 /* Potentially call timevar_init (which will create g_timevars if it
2122 doesn't already exist). */
2125 toplev::start_timevars ()
2127 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2130 timevar_start (TV_TOTAL
);
2133 /* Handle -fself-test. */
2136 toplev::run_self_tests ()
2140 error_at (UNKNOWN_LOCATION
, "self-tests incompatible with -E");
2144 /* Reset some state. */
2145 input_location
= UNKNOWN_LOCATION
;
2146 bitmap_obstack_initialize (NULL
);
2148 /* Run the tests; any failures will lead to an abort of the process.
2149 Use "make selftests-gdb" to run under the debugger. */
2150 ::selftest::run_tests ();
2153 bitmap_obstack_release (NULL
);
2155 inform (UNKNOWN_LOCATION
, "self-tests are not enabled in this build");
2156 #endif /* #if CHECKING_P */
2159 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2160 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2161 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2163 It is not safe to call this function more than once. */
2166 toplev::main (int argc
, char **argv
)
2168 /* Parsing and gimplification sometimes need quite large stack.
2169 Increase stack size limits if possible. */
2170 stack_limit_increase (64 * 1024 * 1024);
2172 expandargv (&argc
, &argv
);
2174 /* Initialization of GCC's environment, and diagnostics. */
2175 general_init (argv
[0], m_init_signals
);
2177 /* One-off initialization of options that does not need to be
2178 repeated when options are added for particular functions. */
2179 init_options_once ();
2180 init_opts_obstack ();
2182 /* Initialize global options structures; this must be repeated for
2183 each structure used for parsing options. */
2184 init_options_struct (&global_options
, &global_options_set
);
2185 lang_hooks
.init_options_struct (&global_options
);
2187 /* Convert the options to an array. */
2188 decode_cmdline_options_to_array_default_mask (argc
,
2189 CONST_CAST2 (const char **,
2191 &save_decoded_options
,
2192 &save_decoded_options_count
);
2194 /* Perform language-specific options initialization. */
2195 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2197 /* Parse the options and do minimal processing; basically just
2198 enough to default flags appropriately. */
2199 decode_options (&global_options
, &global_options_set
,
2200 save_decoded_options
, save_decoded_options_count
,
2201 UNKNOWN_LOCATION
, global_dc
,
2202 targetm
.target_option
.override
);
2204 handle_common_deferred_options ();
2208 initialize_plugins ();
2211 print_version (stderr
, "", true);
2214 print_plugins_help (stderr
, "");
2216 /* Exit early if we can (e.g. -help). */
2217 if (!exit_after_options
)
2224 if (warningcount
|| errorcount
|| werrorcount
)
2225 print_ignored_options ();
2230 /* Invoke registered plugin callbacks if any. Some plugins could
2231 emit some diagnostics here. */
2232 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2234 if (flag_diagnostics_generate_patch
)
2236 gcc_assert (global_dc
->edit_context_ptr
);
2239 pp_show_color (&pp
) = pp_show_color (global_dc
->printer
);
2240 global_dc
->edit_context_ptr
->print_diff (&pp
, true);
2244 diagnostic_finish (global_dc
);
2246 finalize_plugins ();
2248 after_memory_report
= true;
2250 if (seen_error () || werrorcount
)
2251 return (FATAL_EXIT_CODE
);
2253 return (SUCCESS_EXIT_CODE
);
2256 /* For those that want to, this function aims to clean up enough state that
2257 you can call toplev::main again. */
2259 toplev::finalize (void)
2261 rtl_initialized
= false;
2262 this_target_rtl
->target_specific_initialized
= false;
2264 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2265 ipa_reference_c_finalize ();
2266 ipa_fnsummary_c_finalize ();
2268 cgraph_c_finalize ();
2269 cgraphunit_c_finalize ();
2270 dwarf2out_c_finalize ();
2272 ipa_cp_c_finalize ();
2273 ira_costs_c_finalize ();
2274 params_c_finalize ();
2276 finalize_options_struct (&global_options
);
2277 finalize_options_struct (&global_options_set
);
2279 /* save_decoded_options uses opts_obstack, so these must
2280 be cleaned up together. */
2281 obstack_free (&opts_obstack
, NULL
);
2282 XDELETEVEC (save_decoded_options
);
2283 save_decoded_options
= NULL
;
2284 save_decoded_options_count
= 0;
2286 /* Clean up the context (and pass_manager etc). */