1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2019 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* This is the top level of cc1/c++.
21 It parses command args, opens files, invokes the various passes
22 in the proper order, and counts the time used by each.
23 Error messages and low-level interface to malloc also handled here. */
27 #include "coretypes.h"
33 #include "alloc-pool.h"
37 #include "optabs-libfuncs.h"
38 #include "insn-config.h"
43 #include "diagnostic.h"
45 #include "tree-inline.h"
46 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
49 #include "insn-attr.h"
54 #include "tree-diagnostic.h"
58 #include "dwarf2asm.h"
60 #include "common/common-target.h"
61 #include "langhooks.h"
62 #include "cfgloop.h" /* for init_set_costs */
63 #include "hosthooks.h"
65 #include "opts-diagnostic.h"
66 #include "stringpool.h"
72 #include "pass_manager.h"
73 #include "auto-profile.h"
74 #include "dwarf2out.h"
75 #include "ipa-reference.h"
76 #include "symbol-summary.h"
80 #include "omp-offload.h"
81 #include "hsa-common.h"
82 #include "edit-context.h"
83 #include "tree-pass.h"
85 #include "ipa-fnsummary.h"
86 #include "dump-context.h"
87 #include "optinfo-emit-json.h"
89 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
93 #ifdef XCOFF_DEBUGGING_INFO
94 #include "xcoffout.h" /* Needed for external data declarations. */
100 #include <isl/version.h>
103 static void general_init (const char *, bool);
104 static void do_compile ();
105 static void process_options (void);
106 static void backend_init (void);
107 static int lang_dependent_init (const char *);
108 static void init_asm_output (const char *);
109 static void finalize (bool);
111 static void crash_signal (int) ATTRIBUTE_NORETURN
;
112 static void compile_file (void);
114 /* True if we don't need a backend (e.g. preprocessing only). */
115 static bool no_backend
;
117 /* Length of line when printing switch values. */
120 /* Decoded options, and number of such options. */
121 struct cl_decoded_option
*save_decoded_options
;
122 unsigned int save_decoded_options_count
;
124 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
125 to optimize in process_options (). */
126 #define AUTODETECT_VALUE 2
128 /* Debug hooks - dependent upon command line options. */
130 const struct gcc_debug_hooks
*debug_hooks
;
132 /* The FUNCTION_DECL for the function currently being compiled,
133 or 0 if between functions. */
134 tree current_function_decl
;
136 /* Set to the FUNC_BEGIN label of the current function, or NULL
138 const char * current_function_func_begin_label
;
140 /* A random sequence of characters, unless overridden by user. */
141 static const char *flag_random_seed
;
143 /* A local time stamp derived from the time of compilation. It will be
144 zero if the system cannot provide a time. It will be -1u, if the
145 user has specified a particular random seed. */
148 /* Random number for this compilation */
149 HOST_WIDE_INT random_seed
;
153 /* When non-NULL, indicates that whenever space is allocated on the
154 stack, the resulting stack pointer must not pass this
155 address---that is, for stacks that grow downward, the stack pointer
156 must always be greater than or equal to this address; for stacks
157 that grow upward, the stack pointer must be less than this address.
158 At present, the rtx may be either a REG or a SYMBOL_REF, although
159 the support provided depends on the backend. */
162 struct target_flag_state default_target_flag_state
;
163 #if SWITCHABLE_TARGET
164 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
166 #define this_target_flag_state (&default_target_flag_state)
169 /* The user symbol prefix after having resolved same. */
170 const char *user_label_prefix
;
172 /* Output files for assembler code (real compiler output)
173 and debugging dumps. */
177 FILE *stack_usage_file
= NULL
;
179 /* The current working directory of a translation. It's generally the
180 directory from which compilation was initiated, but a preprocessed
181 file may specify the original directory in which it was
184 static const char *src_pwd
;
186 /* Initialize src_pwd with the given string, and return true. If it
187 was already initialized, return false. As a special case, it may
188 be called with a NULL argument to test whether src_pwd has NOT been
192 set_src_pwd (const char *pwd
)
196 if (strcmp (src_pwd
, pwd
) == 0)
202 src_pwd
= xstrdup (pwd
);
206 /* Return the directory from which the translation unit was initiated,
207 in case set_src_pwd() was not called before to assign it a
223 /* Called when the start of a function definition is parsed,
224 this function prints on stderr the name of the function. */
226 announce_function (tree decl
)
230 if (rtl_dump_and_exit
)
231 fprintf (stderr
, "%s ",
232 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
234 fprintf (stderr
, " %s",
235 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
237 pp_needs_newline (global_dc
->printer
) = true;
238 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
242 /* Initialize local_tick with the time of day, or -1 if
243 flag_random_seed is set. */
246 init_local_tick (void)
248 if (!flag_random_seed
)
250 #ifdef HAVE_GETTIMEOFDAY
254 gettimeofday (&tv
, NULL
);
255 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
259 time_t now
= time (NULL
);
261 if (now
!= (time_t)-1)
262 local_tick
= (unsigned) now
;
270 /* Obtain the random_seed. Unless NOINIT, initialize it if
271 it's not provided in the command line. */
274 get_random_seed (bool noinit
)
276 if (!random_seed
&& !noinit
)
278 int fd
= open ("/dev/urandom", O_RDONLY
);
281 if (read (fd
, &random_seed
, sizeof (random_seed
))
282 != sizeof (random_seed
))
287 random_seed
= local_tick
^ getpid ();
292 /* Set flag_random_seed to VAL, and if non-null, reinitialize random_seed. */
295 set_random_seed (const char *val
)
297 flag_random_seed
= val
;
298 if (flag_random_seed
)
302 /* When the driver passed in a hex number don't crc it again */
303 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
304 if (!(endp
> flag_random_seed
&& *endp
== 0))
305 random_seed
= crc32_string (0, flag_random_seed
);
309 /* Handler for fatal signals, such as SIGSEGV. These are transformed
310 into ICE messages, which is much more user friendly. In case the
311 error printer crashes, reset the signal to prevent infinite recursion. */
314 crash_signal (int signo
)
316 signal (signo
, SIG_DFL
);
318 /* If we crashed while processing an ASM statement, then be a little more
319 graceful. It's most likely the user's fault. */
320 if (this_is_asm_operands
)
322 output_operand_lossage ("unrecoverable error");
323 exit (FATAL_EXIT_CODE
);
326 internal_error ("%s", strsignal (signo
));
329 /* A subroutine of wrapup_global_declarations. We've come to the end of
330 the compilation unit. All deferred variables should be undeferred,
331 and all incomplete decls should be finalized. */
334 wrapup_global_declaration_1 (tree decl
)
336 /* We're not deferring this any longer. Assignment is conditional to
337 avoid needlessly dirtying PCH pages. */
338 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
339 && DECL_DEFER_OUTPUT (decl
) != 0)
340 DECL_DEFER_OUTPUT (decl
) = 0;
342 if (VAR_P (decl
) && DECL_SIZE (decl
) == 0)
343 lang_hooks
.finish_incomplete_decl (decl
);
346 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
347 needs to be output. Return true if it is output. */
350 wrapup_global_declaration_2 (tree decl
)
352 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
353 || (VAR_P (decl
) && DECL_HAS_VALUE_EXPR_P (decl
)))
356 /* Don't write out static consts, unless we still need them.
358 We also keep static consts if not optimizing (for debugging),
359 unless the user specified -fno-keep-static-consts.
360 ??? They might be better written into the debug information.
361 This is possible when using DWARF.
363 A language processor that wants static constants to be always
364 written out (even if it is not used) is responsible for
365 calling rest_of_decl_compilation itself. E.g. the C front-end
366 calls rest_of_decl_compilation from finish_decl.
367 One motivation for this is that is conventional in some
368 environments to write things like:
369 static const char rcsid[] = "... version string ...";
370 intending to force the string to be in the executable.
372 A language processor that would prefer to have unneeded
373 static constants "optimized away" would just defer writing
374 them out until here. E.g. C++ does this, because static
375 constants are often defined in header files.
377 ??? A tempting alternative (for both C and C++) would be
378 to force a constant to be written if and only if it is
379 defined in a main file, as opposed to an include file. */
381 if (VAR_P (decl
) && TREE_STATIC (decl
))
385 node
= varpool_node::get (decl
);
387 if (!node
&& flag_ltrans
)
389 else if (node
&& node
->definition
)
391 else if (node
&& node
->alias
)
393 else if (!symtab
->global_info_ready
395 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
397 else if (node
&& node
->analyzed
)
399 else if (DECL_COMDAT (decl
))
401 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
402 && (optimize
|| !flag_keep_static_consts
403 || DECL_ARTIFICIAL (decl
)))
408 rest_of_decl_compilation (decl
, 1, 1);
416 /* Do any final processing required for the declarations in VEC, of
417 which there are LEN. We write out inline functions and variables
418 that have been deferred until this point, but which are required.
419 Returns nonzero if anything was put out. */
422 wrapup_global_declarations (tree
*vec
, int len
)
424 bool reconsider
, output_something
= false;
427 for (i
= 0; i
< len
; i
++)
428 wrapup_global_declaration_1 (vec
[i
]);
430 /* Now emit any global variables or functions that we have been
431 putting off. We need to loop in case one of the things emitted
432 here references another one which comes earlier in the list. */
436 for (i
= 0; i
< len
; i
++)
437 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
439 output_something
= true;
443 return output_something
;
446 /* Compile an entire translation unit. Write a file of assembly
447 output and various debugging dumps. */
452 timevar_start (TV_PHASE_PARSING
);
453 timevar_push (TV_PARSE_GLOBAL
);
455 /* Parse entire file and generate initial debug information. */
456 lang_hooks
.parse_file ();
458 timevar_pop (TV_PARSE_GLOBAL
);
459 timevar_stop (TV_PHASE_PARSING
);
461 if (flag_dump_locations
)
462 dump_location_info (stderr
);
464 /* Compilation is now finished except for writing
465 what's left of the symbol table output. */
467 if (flag_syntax_only
|| flag_wpa
)
470 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
471 and this shouldn't influence any types built by the middle-end
472 from now on (like gcov_info_type). */
473 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
475 ggc_protect_identifiers
= false;
477 /* Run the actual compilation process. */
480 timevar_start (TV_PHASE_OPT_GEN
);
481 symtab
->finalize_compilation_unit ();
482 timevar_stop (TV_PHASE_OPT_GEN
);
485 /* Perform any post compilation-proper parser cleanups and
486 processing. This is currently only needed for the C++ parser,
487 which can be hopefully cleaned up so this hook is no longer
489 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
490 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
492 dump_context::get ().finish_any_json_writer ();
497 timevar_start (TV_PHASE_LATE_ASM
);
499 /* Compilation unit is finalized. When producing non-fat LTO object, we are
500 basically finished. */
501 if ((in_lto_p
&& flag_incremental_link
!= INCREMENTAL_LINK_LTO
)
502 || !flag_lto
|| flag_fat_lto_objects
)
504 /* File-scope initialization for AddressSanitizer. */
505 if (flag_sanitize
& SANITIZE_ADDRESS
)
508 if (flag_sanitize
& SANITIZE_THREAD
)
515 output_shared_constant_pool ();
516 output_object_blocks ();
517 finish_tm_clone_pairs ();
519 /* Write out any pending weak symbol declarations. */
522 /* This must be at the end before unwind and debug info.
523 Some target ports emit PIC setup thunks here. */
524 targetm
.asm_out
.code_end ();
526 /* Do dbx symbols. */
527 timevar_push (TV_SYMOUT
);
529 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
530 dwarf2out_frame_finish ();
534 (*debug_hooks
->finish
) (main_input_filename
);
536 timevar_pop (TV_SYMOUT
);
538 /* Output some stuff at end of file if nec. */
540 dw2_output_indirect_constants ();
542 /* Flush any pending external directives. */
543 process_pending_assemble_externals ();
546 /* Emit LTO marker if LTO info has been previously emitted. This is
547 used by collect2 to determine whether an object file contains IL.
548 We used to emit an undefined reference here, but this produces
549 link errors if an object file with IL is stored into a shared
550 library without invoking lto1. */
551 if (flag_generate_lto
|| flag_generate_offload
)
553 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
554 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
556 HOST_WIDE_INT_1U
, 8);
557 #elif defined ASM_OUTPUT_ALIGNED_COMMON
558 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
559 HOST_WIDE_INT_1U
, 8);
561 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
567 /* Let linker plugin know that this is a slim object and must be LTOed
568 even when user did not ask for it. */
569 if (flag_generate_lto
&& !flag_fat_lto_objects
)
571 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
572 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
573 HOST_WIDE_INT_1U
, 8);
574 #elif defined ASM_OUTPUT_ALIGNED_COMMON
575 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
576 HOST_WIDE_INT_1U
, 8);
578 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
584 /* Attach a special .ident directive to the end of the file to identify
585 the version of GCC which compiled this code. The format of the .ident
586 string is patterned after the ones produced by native SVR4 compilers. */
589 const char *pkg_version
= "(GNU) ";
592 if (strcmp ("(GCC) ", pkgversion_string
))
593 pkg_version
= pkgversion_string
;
595 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
596 targetm
.asm_out
.output_ident (ident_str
);
599 /* Auto profile finalization. */
600 if (flag_auto_profile
)
603 /* Invoke registered plugin callbacks. */
604 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
606 /* This must be at the end. Some target ports emit end of file directives
607 into the assembly file here, and hence we cannot output anything to the
608 assembly file after this point. */
609 targetm
.asm_out
.file_end ();
611 timevar_stop (TV_PHASE_LATE_ASM
);
614 /* Print version information to FILE.
615 Each line begins with INDENT (for the case where FILE is the
616 assembler output file).
618 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
619 proper and can print pertinent state (e.g. params and plugins).
621 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
622 compiler, and we don't hold the mutex on the compiler's global state:
623 we can't print params and plugins, since they might not be initialized,
624 or might be being manipulated by a compile running in another
628 print_version (FILE *file
, const char *indent
, bool show_global_state
)
630 static const char fmt1
[] =
632 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
634 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
637 static const char fmt2
[] =
638 N_("GMP version %s, MPFR version %s, MPC version %s, isl version %s\n");
639 static const char fmt3
[] =
640 N_("%s%swarning: %s header version %s differs from library version %s.\n");
641 static const char fmt4
[] =
642 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
644 #define __VERSION__ "[?]"
647 file
== stderr
? _(fmt1
) : fmt1
,
648 indent
, *indent
!= 0 ? " " : "",
649 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
650 indent
, __VERSION__
);
652 /* We need to stringify the GMP macro values. Ugh, gmp_version has
653 two string formats, "i.j.k" and "i.j" when k is zero. As of
654 gmp-4.3.0, GMP always uses the 3 number format. */
655 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
656 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
657 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
658 #define GCC_GMP_VERSION \
659 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
660 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
661 #define GCC_GMP_STRINGIFY_VERSION \
662 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
663 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
665 #define GCC_GMP_STRINGIFY_VERSION \
666 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
667 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
668 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
671 file
== stderr
? _(fmt2
) : fmt2
,
672 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
,
679 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
681 file
== stderr
? _(fmt3
) : fmt3
,
682 indent
, *indent
!= 0 ? " " : "",
683 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
684 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
686 file
== stderr
? _(fmt3
) : fmt3
,
687 indent
, *indent
!= 0 ? " " : "",
688 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
689 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
691 file
== stderr
? _(fmt3
) : fmt3
,
692 indent
, *indent
!= 0 ? " " : "",
693 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
695 if (show_global_state
)
698 file
== stderr
? _(fmt4
) : fmt4
,
699 indent
, *indent
!= 0 ? " " : "",
700 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
702 print_plugins_versions (file
, indent
);
707 print_to_asm_out_file (print_switch_type type
, const char * text
)
709 bool prepend_sep
= true;
713 case SWITCH_TYPE_LINE_END
:
714 putc ('\n', asm_out_file
);
717 case SWITCH_TYPE_LINE_START
:
718 fputs (ASM_COMMENT_START
, asm_out_file
);
719 return strlen (ASM_COMMENT_START
);
721 case SWITCH_TYPE_DESCRIPTIVE
:
722 if (ASM_COMMENT_START
[0] == 0)
725 case SWITCH_TYPE_PASSED
:
726 case SWITCH_TYPE_ENABLED
:
728 fputc (' ', asm_out_file
);
729 fputs (text
, asm_out_file
);
730 /* No need to return the length here as
731 print_single_switch has already done it. */
740 print_to_stderr (print_switch_type type
, const char * text
)
744 case SWITCH_TYPE_LINE_END
:
748 case SWITCH_TYPE_LINE_START
:
751 case SWITCH_TYPE_PASSED
:
752 case SWITCH_TYPE_ENABLED
:
756 case SWITCH_TYPE_DESCRIPTIVE
:
757 fputs (text
, stderr
);
758 /* No need to return the length here as
759 print_single_switch has already done it. */
767 /* Print an option value and return the adjusted position in the line.
768 ??? print_fn doesn't handle errors, eg disk full; presumably other
769 code will catch a disk full though. */
772 print_single_switch (print_switch_fn_type print_fn
,
774 print_switch_type type
,
777 /* The ultrix fprintf returns 0 on success, so compute the result
778 we want here since we need it for the following test. The +1
779 is for the separator character that will probably be emitted. */
780 int len
= strlen (text
) + 1;
783 && pos
+ len
> MAX_LINE
)
785 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
790 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
792 print_fn (type
, text
);
796 /* Print active target switches using PRINT_FN.
797 POS is the current cursor position and MAX is the size of a "line".
798 Each line begins with INDENT and ends with TERM.
799 Each switch is separated from the next by SEP. */
802 print_switch_values (print_switch_fn_type print_fn
)
807 /* Print the options as passed. */
808 pos
= print_single_switch (print_fn
, pos
,
809 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
811 for (j
= 1; j
< save_decoded_options_count
; j
++)
813 switch (save_decoded_options
[j
].opt_index
)
826 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
827 save_decoded_options
[j
].orig_option_with_args_text
);
831 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
833 /* Print the -f and -m options that have been enabled.
834 We don't handle language specific options but printing argv
836 pos
= print_single_switch (print_fn
, 0,
837 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
839 for (j
= 0; j
< cl_options_count
; j
++)
840 if (cl_options
[j
].cl_report
841 && option_enabled (j
, &global_options
) > 0)
842 pos
= print_single_switch (print_fn
, pos
,
843 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
845 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
848 /* Open assembly code output file. Do this even if -fsyntax-only is
849 on, because then the driver will have provided the name of a
850 temporary file or bit bucket for us. NAME is the file specified on
851 the command line, possibly NULL. */
853 init_asm_output (const char *name
)
855 if (name
== NULL
&& asm_file_name
== 0)
856 asm_out_file
= stdout
;
859 if (asm_file_name
== 0)
861 int len
= strlen (dump_base_name
);
862 char *dumpname
= XNEWVEC (char, len
+ 6);
864 memcpy (dumpname
, dump_base_name
, len
+ 1);
865 strip_off_ending (dumpname
, len
);
866 strcat (dumpname
, ".s");
867 asm_file_name
= dumpname
;
869 if (!strcmp (asm_file_name
, "-"))
870 asm_out_file
= stdout
;
871 else if (!canonical_filename_eq (asm_file_name
, name
)
872 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
873 asm_out_file
= fopen (asm_file_name
, "w");
875 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
876 line in the current file. */
877 fatal_error (UNKNOWN_LOCATION
,
878 "input file %qs is the same as output file",
880 if (asm_out_file
== 0)
881 fatal_error (UNKNOWN_LOCATION
,
882 "can%'t open %qs for writing: %m", asm_file_name
);
885 if (!flag_syntax_only
)
887 targetm
.asm_out
.file_start ();
889 if (flag_record_gcc_switches
)
891 if (targetm
.asm_out
.record_gcc_switches
)
893 /* Let the target know that we are about to start recording. */
894 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
896 /* Now record the switches. */
897 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
898 /* Let the target know that the recording is over. */
899 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
903 inform (UNKNOWN_LOCATION
,
904 "%<-frecord-gcc-switches%> is not supported by "
905 "the current target");
908 if (flag_verbose_asm
)
910 /* Print the list of switches in effect
911 into the assembler file as comments. */
912 print_version (asm_out_file
, ASM_COMMENT_START
, true);
913 print_switch_values (print_to_asm_out_file
);
914 putc ('\n', asm_out_file
);
919 /* A helper function; used as the reallocator function for cpp's line
922 realloc_for_line_map (void *ptr
, size_t len
)
924 return ggc_realloc (ptr
, len
);
927 /* A helper function: used as the allocator function for
928 identifier_to_locale. */
930 alloc_for_identifier_to_locale (size_t len
)
932 return ggc_alloc_atomic (len
);
935 /* Output stack usage information. */
937 output_stack_usage (void)
939 static bool warning_issued
= false;
940 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
941 const char *stack_usage_kind_str
[] = {
946 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
947 enum stack_usage_kind_type stack_usage_kind
;
953 warning (0, "stack usage computation not supported for this target");
954 warning_issued
= true;
959 stack_usage_kind
= STATIC
;
961 /* Add the maximum amount of space pushed onto the stack. */
962 if (maybe_ne (current_function_pushed_stack_size
, 0))
965 if (current_function_pushed_stack_size
.is_constant (&extra
))
967 stack_usage
+= extra
;
968 stack_usage_kind
= DYNAMIC_BOUNDED
;
972 extra
= constant_lower_bound (current_function_pushed_stack_size
);
973 stack_usage
+= extra
;
974 stack_usage_kind
= DYNAMIC
;
978 /* Now on to the tricky part: dynamic stack allocation. */
979 if (current_function_allocates_dynamic_stack_space
)
981 if (stack_usage_kind
!= DYNAMIC
)
983 if (current_function_has_unbounded_dynamic_stack_size
)
984 stack_usage_kind
= DYNAMIC
;
986 stack_usage_kind
= DYNAMIC_BOUNDED
;
989 /* Add the size even in the unbounded case, this can't hurt. */
990 stack_usage
+= current_function_dynamic_stack_size
;
993 if (stack_usage_file
)
995 expanded_location loc
996 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
997 /* We don't want to print the full qualified name because it can be long,
998 so we strip the scope prefix, but we may need to deal with the suffix
999 created by the compiler. */
1001 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1003 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1006 const char *dot
= strchr (name
, '.');
1007 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1010 dot
= strchr (name
, '.');
1015 const char *dot
= strrchr (name
, '.');
1020 fprintf (stack_usage_file
,
1021 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1022 lbasename (loc
.file
),
1027 stack_usage_kind_str
[stack_usage_kind
]);
1030 if (warn_stack_usage
>= 0 && warn_stack_usage
< HOST_WIDE_INT_MAX
)
1032 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1034 if (stack_usage_kind
== DYNAMIC
)
1035 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1036 else if (stack_usage
> warn_stack_usage
)
1038 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1040 OPT_Wstack_usage_
, "stack usage might be %wu bytes",
1043 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wu bytes",
1049 /* Open an auxiliary output file. */
1051 open_auxiliary_file (const char *ext
)
1056 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1057 file
= fopen (filename
, "w");
1059 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1064 /* Alternative diagnostics callback for reentered ICE reporting. */
1067 internal_error_reentered (diagnostic_context
*, const char *, va_list *)
1069 /* Flush the dump file if emergency_dump_function itself caused an ICE. */
1074 /* Auxiliary callback for the diagnostics code. */
1077 internal_error_function (diagnostic_context
*, const char *, va_list *)
1079 global_dc
->internal_error
= internal_error_reentered
;
1081 emergency_dump_function ();
1084 /* Initialization of the front end environment, before command line
1085 options are parsed. Signal handlers, internationalization etc.
1086 ARGV0 is main's argv[0]. */
1088 general_init (const char *argv0
, bool init_signals
)
1092 p
= argv0
+ strlen (argv0
);
1093 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1097 xmalloc_set_program_name (progname
);
1101 /* Unlock the stdio streams. */
1102 unlock_std_streams ();
1104 gcc_init_libintl ();
1106 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1107 identifier_to_locale_free
= ggc_free
;
1109 /* Initialize the diagnostics reporting machinery, so option parsing
1110 can give warnings and errors. */
1111 diagnostic_initialize (global_dc
, N_OPTS
);
1112 /* Set a default printer. Language specific initializations will
1113 override it later. */
1114 tree_diagnostics_defaults (global_dc
);
1116 global_dc
->show_caret
1117 = global_options_init
.x_flag_diagnostics_show_caret
;
1118 global_dc
->show_labels_p
1119 = global_options_init
.x_flag_diagnostics_show_labels
;
1120 global_dc
->show_line_numbers_p
1121 = global_options_init
.x_flag_diagnostics_show_line_numbers
;
1122 global_dc
->show_option_requested
1123 = global_options_init
.x_flag_diagnostics_show_option
;
1124 global_dc
->min_margin_width
1125 = global_options_init
.x_diagnostics_minimum_margin_width
;
1126 global_dc
->show_column
1127 = global_options_init
.x_flag_show_column
;
1128 global_dc
->internal_error
= internal_error_function
;
1129 global_dc
->option_enabled
= option_enabled
;
1130 global_dc
->option_state
= &global_options
;
1131 global_dc
->option_name
= option_name
;
1135 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1137 signal (SIGSEGV
, crash_signal
);
1140 signal (SIGILL
, crash_signal
);
1143 signal (SIGBUS
, crash_signal
);
1146 signal (SIGABRT
, crash_signal
);
1148 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1149 signal (SIGIOT
, crash_signal
);
1152 signal (SIGFPE
, crash_signal
);
1155 /* Other host-specific signal setup. */
1156 (*host_hooks
.extra_signals
)();
1159 /* Initialize the garbage-collector, string pools and tree type hash
1163 input_location
= UNKNOWN_LOCATION
;
1164 line_table
= ggc_alloc
<line_maps
> ();
1165 linemap_init (line_table
, BUILTINS_LOCATION
);
1166 line_table
->reallocator
= realloc_for_line_map
;
1167 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1168 line_table
->default_range_bits
= 5;
1171 /* Initialize register usage now so switches may override. */
1174 /* Register the language-independent parameters. */
1175 global_init_params ();
1177 /* This must be done after global_init_params but before argument
1179 init_ggc_heuristics ();
1181 /* Create the singleton holder for global state. This creates the
1183 g
= new gcc::context ();
1185 /* Allow languages and middle-end to register their dumps before the
1186 optimization passes. */
1187 g
->get_dumps ()->register_dumps ();
1189 /* Create the passes. */
1190 g
->set_passes (new gcc::pass_manager (g
));
1192 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1194 statistics_early_init ();
1195 debuginfo_early_init ();
1199 /* Return true if the current target supports -fsection-anchors. */
1202 target_supports_section_anchors_p (void)
1204 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1207 if (targetm
.asm_out
.output_anchor
== NULL
)
1213 /* Parse "N[:M][:...]" into struct align_flags A.
1214 VALUES contains parsed values (in reverse order), all processed
1215 values are popped. */
1218 read_log_maxskip (auto_vec
<unsigned> &values
, align_flags_tuple
*a
)
1220 unsigned n
= values
.pop ();
1222 a
->log
= floor_log2 (n
* 2 - 1);
1224 if (values
.is_empty ())
1225 a
->maxskip
= n
? n
- 1 : 0;
1228 unsigned m
= values
.pop ();
1229 /* -falign-foo=N:M means M-1 max bytes of padding, not M. */
1235 /* Normalize the tuple. */
1239 /* Parse "N[:M[:N2[:M2]]]" string FLAG into a pair of struct align_flags. */
1242 parse_N_M (const char *flag
, align_flags
&a
)
1246 static hash_map
<nofree_string_hash
, align_flags
> cache
;
1247 align_flags
*entry
= cache
.get (flag
);
1254 auto_vec
<unsigned> result_values
;
1255 bool r
= parse_and_check_align_values (flag
, NULL
, result_values
, false,
1260 /* Reverse values for easier manipulation. */
1261 result_values
.reverse ();
1263 read_log_maxskip (result_values
, &a
.levels
[0]);
1264 if (!result_values
.is_empty ())
1265 read_log_maxskip (result_values
, &a
.levels
[1]);
1269 /* N2[:M2] is not specified. This arch has a default for N2.
1270 Before -falign-foo=N:M:N2:M2 was introduced, x86 had a tweak.
1271 -falign-functions=N with N > 8 was adding secondary alignment.
1272 -falign-functions=10 was emitting this before every function:
1275 Now this behavior (and more) can be explicitly requested:
1276 -falign-functions=16:10:8
1277 Retain old behavior if N2 is missing: */
1279 int align
= 1 << a
.levels
[0].log
;
1280 int subalign
= 1 << SUBALIGN_LOG
;
1282 if (a
.levels
[0].log
> SUBALIGN_LOG
1283 && a
.levels
[0].maxskip
>= subalign
- 1)
1285 /* Set N2 unless subalign can never have any effect. */
1286 if (align
> a
.levels
[0].maxskip
+ 1)
1288 a
.levels
[1].log
= SUBALIGN_LOG
;
1289 a
.levels
[1].normalize ();
1295 /* Cache seen value. */
1296 cache
.put (flag
, a
);
1300 /* Process -falign-foo=N[:M[:N2[:M2]]] options. */
1303 parse_alignment_opts (void)
1305 parse_N_M (str_align_loops
, align_loops
);
1306 parse_N_M (str_align_jumps
, align_jumps
);
1307 parse_N_M (str_align_labels
, align_labels
);
1308 parse_N_M (str_align_functions
, align_functions
);
1311 /* Process the options that have been parsed. */
1313 process_options (void)
1315 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1316 This can happen with incorrect pre-processed input. */
1317 debug_hooks
= &do_nothing_debug_hooks
;
1319 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1321 /* Allow the front end to perform consistency checks and do further
1322 initialization based on the command line options. This hook also
1323 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1324 so we can correctly initialize debug output. */
1325 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1327 /* Some machines may reject certain combinations of options. */
1328 location_t saved_location
= input_location
;
1329 input_location
= UNKNOWN_LOCATION
;
1330 targetm
.target_option
.override ();
1331 input_location
= saved_location
;
1333 if (flag_diagnostics_generate_patch
)
1334 global_dc
->edit_context_ptr
= new edit_context ();
1336 /* Avoid any informative notes in the second run of -fcompare-debug. */
1337 if (flag_compare_debug
)
1338 diagnostic_inhibit_notes (global_dc
);
1340 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1342 warning_at (UNKNOWN_LOCATION
, OPT_fsection_anchors
,
1343 "this target does not support %qs",
1344 "-fsection-anchors");
1345 flag_section_anchors
= 0;
1348 if (flag_short_enums
== 2)
1349 flag_short_enums
= targetm
.default_short_enums ();
1351 /* Set aux_base_name if not already set. */
1354 else if (main_input_filename
)
1356 char *name
= xstrdup (lbasename (main_input_filename
));
1358 strip_off_ending (name
, strlen (name
));
1359 aux_base_name
= name
;
1362 aux_base_name
= "gccaux";
1366 || flag_loop_nest_optimize
1367 || flag_graphite_identity
1368 || flag_loop_parallelize_all
)
1369 sorry ("Graphite loop optimizations cannot be used (isl is not available) "
1370 "(%<-fgraphite%>, %<-fgraphite-identity%>, "
1371 "%<-floop-nest-optimize%>, %<-floop-parallelize-all%>)");
1374 if (flag_cf_protection
!= CF_NONE
1375 && !(flag_cf_protection
& CF_SET
))
1377 if (flag_cf_protection
== CF_FULL
)
1379 error_at (UNKNOWN_LOCATION
,
1380 "%<-fcf-protection=full%> is not supported for this "
1382 flag_cf_protection
= CF_NONE
;
1384 if (flag_cf_protection
== CF_BRANCH
)
1386 error_at (UNKNOWN_LOCATION
,
1387 "%<-fcf-protection=branch%> is not supported for this "
1389 flag_cf_protection
= CF_NONE
;
1391 if (flag_cf_protection
== CF_RETURN
)
1393 error_at (UNKNOWN_LOCATION
,
1394 "%<-fcf-protection=return%> is not supported for this "
1396 flag_cf_protection
= CF_NONE
;
1400 /* One region RA really helps to decrease the code size. */
1401 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1403 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1405 if (!abi_version_at_least (2))
1407 /* -fabi-version=1 support was removed after GCC 4.9. */
1408 error_at (UNKNOWN_LOCATION
,
1409 "%<-fabi-version=1%> is no longer supported");
1410 flag_abi_version
= 2;
1413 /* Unrolling all loops implies that standard loop unrolling must also
1415 if (flag_unroll_all_loops
)
1416 flag_unroll_loops
= 1;
1418 /* web and rename-registers help when run after loop unrolling. */
1419 if (flag_web
== AUTODETECT_VALUE
)
1420 flag_web
= flag_unroll_loops
;
1422 if (flag_rename_registers
== AUTODETECT_VALUE
)
1423 flag_rename_registers
= flag_unroll_loops
;
1425 if (flag_non_call_exceptions
)
1426 flag_asynchronous_unwind_tables
= 1;
1427 if (flag_asynchronous_unwind_tables
)
1428 flag_unwind_tables
= 1;
1430 if (flag_value_profile_transformations
)
1431 flag_profile_values
= 1;
1433 /* Warn about options that are not supported on this machine. */
1434 #ifndef INSN_SCHEDULING
1435 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1436 warning_at (UNKNOWN_LOCATION
, 0,
1437 "instruction scheduling not supported on this target machine");
1439 if (!DELAY_SLOTS
&& flag_delayed_branch
)
1440 warning_at (UNKNOWN_LOCATION
, 0,
1441 "this target machine does not have delayed branches");
1443 user_label_prefix
= USER_LABEL_PREFIX
;
1444 if (flag_leading_underscore
!= -1)
1446 /* If the default prefix is more complicated than "" or "_",
1447 issue a warning and ignore this option. */
1448 if (user_label_prefix
[0] == 0 ||
1449 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1451 user_label_prefix
= flag_leading_underscore
? "_" : "";
1454 warning_at (UNKNOWN_LOCATION
, 0,
1455 "%<-f%sleading-underscore%> not supported on this "
1456 "target machine", flag_leading_underscore
? "" : "no-");
1459 /* If we are in verbose mode, write out the version and maybe all the
1460 option flags in use. */
1463 print_version (stderr
, "", true);
1465 print_switch_values (print_to_stderr
);
1468 if (flag_syntax_only
)
1470 write_symbols
= NO_DEBUG
;
1476 if (debug_info_level
== DINFO_LEVEL_NONE
)
1478 debug_info_level
= DINFO_LEVEL_NORMAL
;
1480 if (write_symbols
== NO_DEBUG
)
1481 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1484 debug_info_level
= DINFO_LEVEL_NONE
;
1487 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1489 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1492 error_at (UNKNOWN_LOCATION
,
1493 "could not open final insn dump file %qs: %m",
1494 flag_dump_final_insns
);
1495 flag_dump_final_insns
= NULL
;
1497 else if (fclose (final_output
))
1499 error_at (UNKNOWN_LOCATION
,
1500 "could not close zeroed insn dump file %qs: %m",
1501 flag_dump_final_insns
);
1502 flag_dump_final_insns
= NULL
;
1506 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1508 if (debug_info_level
== DINFO_LEVEL_NONE
)
1509 write_symbols
= NO_DEBUG
;
1511 if (write_symbols
== NO_DEBUG
)
1513 #if defined(DBX_DEBUGGING_INFO)
1514 else if (write_symbols
== DBX_DEBUG
)
1515 debug_hooks
= &dbx_debug_hooks
;
1517 #if defined(XCOFF_DEBUGGING_INFO)
1518 else if (write_symbols
== XCOFF_DEBUG
)
1519 debug_hooks
= &xcoff_debug_hooks
;
1521 #ifdef DWARF2_DEBUGGING_INFO
1522 else if (write_symbols
== DWARF2_DEBUG
)
1523 debug_hooks
= &dwarf2_debug_hooks
;
1525 #ifdef VMS_DEBUGGING_INFO
1526 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1527 debug_hooks
= &vmsdbg_debug_hooks
;
1529 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1530 else if (write_symbols
== DWARF2_DEBUG
)
1531 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1534 error_at (UNKNOWN_LOCATION
,
1535 "target system does not support the %qs debug format",
1536 debug_type_names
[write_symbols
]);
1538 /* We know which debug output will be used so we can set flag_var_tracking
1539 and flag_var_tracking_uninit if the user has not specified them. */
1540 if (debug_info_level
< DINFO_LEVEL_NORMAL
1541 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1543 if (flag_var_tracking
== 1
1544 || flag_var_tracking_uninit
== 1)
1546 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1547 warning_at (UNKNOWN_LOCATION
, 0,
1548 "variable tracking requested, but useless unless "
1549 "producing debug info");
1551 warning_at (UNKNOWN_LOCATION
, 0,
1552 "variable tracking requested, but not supported "
1553 "by this debug format");
1555 flag_var_tracking
= 0;
1556 flag_var_tracking_uninit
= 0;
1559 /* The debug hooks are used to implement -fdump-go-spec because it
1560 gives a simple and stable API for all the information we need to
1562 if (flag_dump_go_spec
!= NULL
)
1563 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1565 /* If the user specifically requested variable tracking with tagging
1566 uninitialized variables, we need to turn on variable tracking.
1567 (We already determined above that variable tracking is feasible.) */
1568 if (flag_var_tracking_uninit
== 1)
1569 flag_var_tracking
= 1;
1571 if (flag_var_tracking
== AUTODETECT_VALUE
)
1572 flag_var_tracking
= optimize
>= 1;
1574 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1575 flag_var_tracking_uninit
= flag_var_tracking
;
1577 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1578 flag_var_tracking_assignments
1579 = (flag_var_tracking
1580 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1582 if (flag_var_tracking_assignments_toggle
)
1583 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1585 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1586 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1588 if (flag_var_tracking_assignments
1589 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1590 warning_at (UNKNOWN_LOCATION
, 0,
1591 "var-tracking-assignments changes selective scheduling");
1593 if (debug_nonbind_markers_p
== AUTODETECT_VALUE
)
1594 debug_nonbind_markers_p
1596 && debug_info_level
>= DINFO_LEVEL_NORMAL
1597 && (write_symbols
== DWARF2_DEBUG
1598 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1599 && !(flag_selective_scheduling
|| flag_selective_scheduling2
));
1601 if (dwarf2out_as_loc_support
== AUTODETECT_VALUE
)
1602 dwarf2out_as_loc_support
1603 = dwarf2out_default_as_loc_support ();
1604 if (dwarf2out_as_locview_support
== AUTODETECT_VALUE
)
1605 dwarf2out_as_locview_support
1606 = dwarf2out_default_as_locview_support ();
1608 if (debug_variable_location_views
== AUTODETECT_VALUE
)
1610 debug_variable_location_views
1611 = (flag_var_tracking
1612 && debug_info_level
>= DINFO_LEVEL_NORMAL
1613 && (write_symbols
== DWARF2_DEBUG
1614 || write_symbols
== VMS_AND_DWARF2_DEBUG
)
1616 && dwarf2out_as_loc_support
1617 && dwarf2out_as_locview_support
);
1619 else if (debug_variable_location_views
== -1 && dwarf_version
!= 5)
1621 warning_at (UNKNOWN_LOCATION
, 0,
1622 "without %<-gdwarf-5%>, "
1623 "%<-gvariable-location-views=incompat5%> "
1624 "is equivalent to %<-gvariable-location-views%>");
1625 debug_variable_location_views
= 1;
1628 if (debug_internal_reset_location_views
== 2)
1630 debug_internal_reset_location_views
1631 = (debug_variable_location_views
1632 && targetm
.reset_location_view
);
1634 else if (debug_internal_reset_location_views
1635 && !debug_variable_location_views
)
1637 warning_at (UNKNOWN_LOCATION
, 0,
1638 "%<-ginternal-reset-location-views%> is forced disabled "
1639 "without %<-gvariable-location-views%>");
1640 debug_internal_reset_location_views
= 0;
1643 if (debug_inline_points
== AUTODETECT_VALUE
)
1644 debug_inline_points
= debug_variable_location_views
;
1645 else if (debug_inline_points
&& !debug_nonbind_markers_p
)
1647 warning_at (UNKNOWN_LOCATION
, 0,
1648 "%<-ginline-points%> is forced disabled without "
1649 "%<-gstatement-frontiers%>");
1650 debug_inline_points
= 0;
1653 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1655 if (HAVE_conditional_move
)
1656 flag_tree_cselim
= 1;
1658 flag_tree_cselim
= 0;
1661 /* If auxiliary info generation is desired, open the output file.
1662 This goes in the same directory as the source file--unlike
1663 all the other output files. */
1664 if (flag_gen_aux_info
)
1666 aux_info_file
= fopen (aux_info_file_name
, "w");
1667 if (aux_info_file
== 0)
1668 fatal_error (UNKNOWN_LOCATION
,
1669 "can%'t open %s: %m", aux_info_file_name
);
1672 if (!targetm_common
.have_named_sections
)
1674 if (flag_function_sections
)
1676 warning_at (UNKNOWN_LOCATION
, 0,
1677 "%<-ffunction-sections%> not supported for this target");
1678 flag_function_sections
= 0;
1680 if (flag_data_sections
)
1682 warning_at (UNKNOWN_LOCATION
, 0,
1683 "%<-fdata-sections%> not supported for this target");
1684 flag_data_sections
= 0;
1688 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1690 warning_at (UNKNOWN_LOCATION
, 0,
1691 "%<-fprefetch-loop-arrays%> not supported for this target");
1692 flag_prefetch_loop_arrays
= 0;
1694 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1696 warning_at (UNKNOWN_LOCATION
, 0,
1697 "%<-fprefetch-loop-arrays%> not supported for this target "
1698 "(try %<-march%> switches)");
1699 flag_prefetch_loop_arrays
= 0;
1702 /* This combination of options isn't handled for i386 targets and doesn't
1703 make much sense anyway, so don't allow it. */
1704 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1706 warning_at (UNKNOWN_LOCATION
, 0,
1707 "%<-fprefetch-loop-arrays%> is not supported with %<-Os%>");
1708 flag_prefetch_loop_arrays
= 0;
1711 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1712 if (flag_signaling_nans
)
1713 flag_trapping_math
= 1;
1715 /* We cannot reassociate if we want traps or signed zeros. */
1716 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1718 warning_at (UNKNOWN_LOCATION
, 0,
1719 "%<-fassociative-math%> disabled; other options take "
1721 flag_associative_math
= 0;
1724 /* -fstack-clash-protection is not currently supported on targets
1725 where the stack grows up. */
1726 if (flag_stack_clash_protection
&& !STACK_GROWS_DOWNWARD
)
1728 warning_at (UNKNOWN_LOCATION
, 0,
1729 "%<-fstack-clash-protection%> is not supported on targets "
1730 "where the stack grows from lower to higher addresses");
1731 flag_stack_clash_protection
= 0;
1734 /* We cannot support -fstack-check= and -fstack-clash-protection at
1736 if (flag_stack_check
!= NO_STACK_CHECK
&& flag_stack_clash_protection
)
1738 warning_at (UNKNOWN_LOCATION
, 0,
1739 "%<-fstack-check=%> and %<-fstack-clash_protection%> are "
1740 "mutually exclusive. Disabling %<-fstack-check=%>");
1741 flag_stack_check
= NO_STACK_CHECK
;
1744 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1745 if (flag_cx_limited_range
)
1746 flag_complex_method
= 0;
1748 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1749 if (flag_cx_fortran_rules
)
1750 flag_complex_method
= 1;
1752 /* Targets must be able to place spill slots at lower addresses. If the
1753 target already uses a soft frame pointer, the transition is trivial. */
1754 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1756 warning_at (UNKNOWN_LOCATION
, 0,
1757 "%<-fstack-protector%> not supported for this target");
1758 flag_stack_protect
= 0;
1760 if (!flag_stack_protect
)
1761 warn_stack_protect
= 0;
1763 /* Address Sanitizer needs porting to each target architecture. */
1765 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1766 && !FRAME_GROWS_DOWNWARD
)
1768 warning_at (UNKNOWN_LOCATION
, 0,
1769 "%<-fsanitize=address%> and %<-fsanitize=kernel-address%> "
1770 "are not supported for this target");
1771 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1774 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1775 && targetm
.asan_shadow_offset
== NULL
)
1777 warning_at (UNKNOWN_LOCATION
, 0,
1778 "%<-fsanitize=address%> not supported for this target");
1779 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1782 /* Do not use IPA optimizations for register allocation if profiler is active
1783 or patchable function entries are inserted for run-time instrumentation
1784 or port does not emit prologue and epilogue as RTL. */
1785 if (profile_flag
|| function_entry_patch_area_size
1786 || !targetm
.have_prologue () || !targetm
.have_epilogue ())
1789 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1790 have not been set. */
1791 if (!global_options_set
.x_warnings_are_errors
1792 && warn_coverage_mismatch
1793 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1795 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1796 DK_ERROR
, UNKNOWN_LOCATION
);
1798 /* Save the current optimization options. */
1799 optimization_default_node
= build_optimization_node (&global_options
);
1800 optimization_current_node
= optimization_default_node
;
1802 /* Please don't change global_options after this point, those changes won't
1803 be reflected in optimization_{default,current}_node. */
1806 /* This function can be called multiple times to reinitialize the compiler
1807 back end when register classes or instruction sets have changed,
1808 before each function. */
1810 backend_init_target (void)
1812 /* This depends on stack_pointer_rtx. */
1813 init_fake_stack_mems ();
1815 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1817 init_alias_target ();
1819 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1823 /* Depends on the enabled attribute. */
1826 /* The following initialization functions need to generate rtl, so
1827 provide a dummy function context for them. */
1828 init_dummy_function_start ();
1830 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1831 on a mode change. */
1833 init_lower_subreg ();
1836 init_expr_target ();
1839 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1840 after a mode change as well. */
1841 caller_save_initialized_p
= false;
1843 expand_dummy_function_end ();
1846 /* Initialize the compiler back end. This function is called only once,
1847 when starting the compiler. */
1854 init_inline_once ();
1855 init_varasm_once ();
1856 save_register_info ();
1858 /* Middle end needs this initialization for default mem attributes
1859 used by early calls to make_decl_rtl. */
1862 /* Middle end needs this initialization for mode tables used to assign
1863 modes to vector variables. */
1867 /* Initialize excess precision settings.
1869 We have no need to modify anything here, just keep track of what the
1870 user requested. We'll figure out any appropriate relaxations
1874 init_excess_precision (void)
1876 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1877 flag_excess_precision
= flag_excess_precision_cmdline
;
1880 /* Initialize things that are both lang-dependent and target-dependent.
1881 This function can be called more than once if target parameters change. */
1883 lang_dependent_init_target (void)
1885 /* This determines excess precision settings. */
1886 init_excess_precision ();
1888 /* This creates various _DECL nodes, so needs to be called after the
1889 front end is initialized. It also depends on the HAVE_xxx macros
1890 generated from the target machine description. */
1893 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1896 /* Perform initializations that are lang-dependent or target-dependent.
1897 but matters only for late optimizations and RTL generation. */
1899 static int rtl_initialized
;
1902 initialize_rtl (void)
1904 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1906 /* Initialization done just once per compilation, but delayed
1907 till code generation. */
1908 if (!rtl_initialized
)
1910 rtl_initialized
= true;
1912 /* Target specific RTL backend initialization. */
1913 if (!this_target_rtl
->target_specific_initialized
)
1915 backend_init_target ();
1916 this_target_rtl
->target_specific_initialized
= true;
1920 /* Language-dependent initialization. Returns nonzero on success. */
1922 lang_dependent_init (const char *name
)
1924 location_t save_loc
= input_location
;
1925 if (dump_base_name
== 0)
1926 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1928 /* Other front-end initialization. */
1929 input_location
= BUILTINS_LOCATION
;
1930 if (lang_hooks
.init () == 0)
1932 input_location
= save_loc
;
1936 init_asm_output (name
);
1938 /* If stack usage information is desired, open the output file. */
1939 if (flag_stack_usage
&& !flag_generate_lto
)
1940 stack_usage_file
= open_auxiliary_file ("su");
1943 /* This creates various _DECL nodes, so needs to be called after the
1944 front end is initialized. */
1947 /* Do the target-specific parts of the initialization. */
1948 lang_dependent_init_target ();
1952 /* If dbx symbol table desired, initialize writing it and output the
1953 predefined types. */
1954 timevar_push (TV_SYMOUT
);
1956 /* Now we have the correct original filename, we can initialize
1958 (*debug_hooks
->init
) (name
);
1960 timevar_pop (TV_SYMOUT
);
1967 /* Reinitialize everything when target parameters, such as register usage,
1970 target_reinit (void)
1972 struct rtl_data saved_x_rtl
;
1973 rtx
*saved_regno_reg_rtx
;
1974 tree saved_optimization_current_node
;
1975 struct target_optabs
*saved_this_fn_optabs
;
1977 /* Temporarily switch to the default optimization node, so that
1978 *this_target_optabs is set to the default, not reflecting
1979 whatever a previous function used for the optimize
1981 saved_optimization_current_node
= optimization_current_node
;
1982 saved_this_fn_optabs
= this_fn_optabs
;
1983 if (saved_optimization_current_node
!= optimization_default_node
)
1985 optimization_current_node
= optimization_default_node
;
1986 cl_optimization_restore
1988 TREE_OPTIMIZATION (optimization_default_node
));
1990 this_fn_optabs
= this_target_optabs
;
1992 /* Save *crtl and regno_reg_rtx around the reinitialization
1993 to allow target_reinit being called even after prepare_function_start. */
1994 saved_regno_reg_rtx
= regno_reg_rtx
;
1995 if (saved_regno_reg_rtx
)
1997 saved_x_rtl
= *crtl
;
1998 memset (crtl
, '\0', sizeof (*crtl
));
1999 regno_reg_rtx
= NULL
;
2002 this_target_rtl
->target_specific_initialized
= false;
2004 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
2005 to initialize reg_raw_mode[]. */
2008 /* This invokes target hooks to set fixed_reg[] etc, which is
2012 /* Reinitialize lang-dependent parts. */
2013 lang_dependent_init_target ();
2015 /* Restore the original optimization node. */
2016 if (saved_optimization_current_node
!= optimization_default_node
)
2018 optimization_current_node
= saved_optimization_current_node
;
2019 cl_optimization_restore (&global_options
,
2020 TREE_OPTIMIZATION (optimization_current_node
));
2022 this_fn_optabs
= saved_this_fn_optabs
;
2024 /* Restore regno_reg_rtx at the end, as free_after_compilation from
2025 expand_dummy_function_end clears it. */
2026 if (saved_regno_reg_rtx
)
2028 *crtl
= saved_x_rtl
;
2029 regno_reg_rtx
= saved_regno_reg_rtx
;
2030 saved_regno_reg_rtx
= NULL
;
2035 dump_memory_report (bool final
)
2037 dump_line_table_statistics ();
2038 ggc_print_statistics ();
2039 stringpool_statistics ();
2040 dump_tree_statistics ();
2041 dump_gimple_statistics ();
2042 dump_rtx_statistics ();
2043 dump_alloc_pool_statistics ();
2044 dump_bitmap_statistics ();
2045 dump_hash_table_loc_statistics ();
2046 dump_vec_loc_statistics ();
2047 dump_ggc_loc_statistics (final
);
2048 dump_alias_stats (stderr
);
2049 dump_pta_stats (stderr
);
2052 /* Clean up: close opened files, etc. */
2055 finalize (bool no_backend
)
2057 /* Close the dump files. */
2058 if (flag_gen_aux_info
)
2060 fclose (aux_info_file
);
2061 aux_info_file
= NULL
;
2063 unlink (aux_info_file_name
);
2066 /* Close non-debugging input and output files. Take special care to note
2067 whether fclose returns an error, since the pages might still be on the
2068 buffer chain while the file is open. */
2072 if (ferror (asm_out_file
) != 0)
2073 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
2074 if (fclose (asm_out_file
) != 0)
2075 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
2076 asm_out_file
= NULL
;
2079 if (stack_usage_file
)
2081 fclose (stack_usage_file
);
2082 stack_usage_file
= NULL
;
2086 coverage_remove_note_file ();
2093 g
->get_passes ()->finish_optimization_passes ();
2099 dump_memory_report (true);
2102 dump_profile_report ();
2104 /* Language-specific end of compilation actions. */
2105 lang_hooks
.finish ();
2109 standard_type_bitsize (int bitsize
)
2111 /* As a special exception, we always want __int128 enabled if possible. */
2114 if (bitsize
== CHAR_TYPE_SIZE
2115 || bitsize
== SHORT_TYPE_SIZE
2116 || bitsize
== INT_TYPE_SIZE
2117 || bitsize
== LONG_TYPE_SIZE
2118 || bitsize
== LONG_LONG_TYPE_SIZE
)
2123 /* Initialize the compiler, and compile the input file. */
2129 /* Don't do any more if an error has already occurred. */
2134 timevar_start (TV_PHASE_SETUP
);
2136 if (flag_save_optimization_record
)
2138 dump_context::get ().set_json_writer (new optrecord_json_writer ());
2141 /* This must be run always, because it is needed to compute the FP
2142 predefined macros, such as __LDBL_MAX__, for targets using non
2143 default FP formats. */
2144 init_adjust_machine_modes ();
2145 init_derived_machine_modes ();
2147 /* This must happen after the backend has a chance to process
2148 command line options, but before the parsers are
2150 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2151 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2152 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2153 int_n_enabled_p
[i
] = true;
2155 int_n_enabled_p
[i
] = false;
2157 /* Initialize mpfrs exponent range. This is important to get
2158 underflow/overflow in a reasonable timeframe. */
2162 FOR_EACH_MODE_IN_CLASS (mode
, MODE_FLOAT
)
2163 if (SCALAR_FLOAT_MODE_P (mode
))
2165 const real_format
*fmt
= REAL_MODE_FORMAT (mode
);
2168 /* fmt->emin - fmt->p + 1 should be enough but the
2169 back-and-forth dance in real_to_decimal_for_mode we
2170 do for checking fails due to rounding effects then. */
2171 if ((fmt
->emin
- fmt
->p
) < min_exp
)
2172 min_exp
= fmt
->emin
- fmt
->p
;
2173 if (fmt
->emax
> max_exp
)
2174 max_exp
= fmt
->emax
;
2177 /* E.g. mpc_norm assumes it can square a number without bothering with
2178 with range scaling, so until that is fixed, double the minimum
2179 and maximum exponents, plus add some buffer for arithmetics
2180 on the squared numbers. */
2181 if (mpfr_set_emin (2 * (min_exp
- 1))
2182 || mpfr_set_emax (2 * (max_exp
+ 1)))
2183 sorry ("mpfr not configured to handle all float modes");
2185 /* Set up the back-end if requested. */
2189 /* Language-dependent initialization. Returns true on success. */
2190 if (lang_dependent_init (main_input_filename
))
2192 /* Initialize yet another pass. */
2194 ggc_protect_identifiers
= true;
2196 symtab
->initialize ();
2197 init_final (main_input_filename
);
2198 coverage_init (aux_base_name
);
2201 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2203 timevar_stop (TV_PHASE_SETUP
);
2209 timevar_stop (TV_PHASE_SETUP
);
2212 timevar_start (TV_PHASE_FINALIZE
);
2214 finalize (no_backend
);
2216 timevar_stop (TV_PHASE_FINALIZE
);
2220 toplev::toplev (timer
*external_timer
,
2222 : m_use_TV_TOTAL (external_timer
== NULL
),
2223 m_init_signals (init_signals
)
2226 g_timer
= external_timer
;
2231 if (g_timer
&& m_use_TV_TOTAL
)
2233 g_timer
->stop (TV_TOTAL
);
2234 g_timer
->print (stderr
);
2240 /* Potentially call timevar_init (which will create g_timevars if it
2241 doesn't already exist). */
2244 toplev::start_timevars ()
2246 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2249 timevar_start (TV_TOTAL
);
2252 /* Handle -fself-test. */
2255 toplev::run_self_tests ()
2259 error_at (UNKNOWN_LOCATION
, "self-tests incompatible with %<-E%>");
2263 /* Reset some state. */
2264 input_location
= UNKNOWN_LOCATION
;
2265 bitmap_obstack_initialize (NULL
);
2267 /* Run the tests; any failures will lead to an abort of the process.
2268 Use "make selftests-gdb" to run under the debugger. */
2269 ::selftest::run_tests ();
2272 bitmap_obstack_release (NULL
);
2274 inform (UNKNOWN_LOCATION
, "self-tests are not enabled in this build");
2275 #endif /* #if CHECKING_P */
2278 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2279 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2280 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2282 It is not safe to call this function more than once. */
2285 toplev::main (int argc
, char **argv
)
2287 /* Parsing and gimplification sometimes need quite large stack.
2288 Increase stack size limits if possible. */
2289 stack_limit_increase (64 * 1024 * 1024);
2291 expandargv (&argc
, &argv
);
2293 /* Initialization of GCC's environment, and diagnostics. */
2294 general_init (argv
[0], m_init_signals
);
2296 /* One-off initialization of options that does not need to be
2297 repeated when options are added for particular functions. */
2298 init_options_once ();
2299 init_opts_obstack ();
2301 /* Initialize global options structures; this must be repeated for
2302 each structure used for parsing options. */
2303 init_options_struct (&global_options
, &global_options_set
);
2304 lang_hooks
.init_options_struct (&global_options
);
2306 /* Convert the options to an array. */
2307 decode_cmdline_options_to_array_default_mask (argc
,
2308 CONST_CAST2 (const char **,
2310 &save_decoded_options
,
2311 &save_decoded_options_count
);
2313 /* Perform language-specific options initialization. */
2314 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2316 /* Parse the options and do minimal processing; basically just
2317 enough to default flags appropriately. */
2318 decode_options (&global_options
, &global_options_set
,
2319 save_decoded_options
, save_decoded_options_count
,
2320 UNKNOWN_LOCATION
, global_dc
,
2321 targetm
.target_option
.override
);
2323 handle_common_deferred_options ();
2327 initialize_plugins ();
2330 print_version (stderr
, "", true);
2333 print_plugins_help (stderr
, "");
2335 /* Exit early if we can (e.g. -help). */
2336 if (!exit_after_options
)
2343 if (warningcount
|| errorcount
|| werrorcount
)
2344 print_ignored_options ();
2349 /* Invoke registered plugin callbacks if any. Some plugins could
2350 emit some diagnostics here. */
2351 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2353 if (flag_diagnostics_generate_patch
)
2355 gcc_assert (global_dc
->edit_context_ptr
);
2358 pp_show_color (&pp
) = pp_show_color (global_dc
->printer
);
2359 global_dc
->edit_context_ptr
->print_diff (&pp
, true);
2363 diagnostic_finish (global_dc
);
2365 finalize_plugins ();
2367 after_memory_report
= true;
2369 if (seen_error () || werrorcount
)
2370 return (FATAL_EXIT_CODE
);
2372 return (SUCCESS_EXIT_CODE
);
2375 /* For those that want to, this function aims to clean up enough state that
2376 you can call toplev::main again. */
2378 toplev::finalize (void)
2380 rtl_initialized
= false;
2381 this_target_rtl
->target_specific_initialized
= false;
2383 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2384 ipa_reference_c_finalize ();
2385 ipa_fnsummary_c_finalize ();
2387 cgraph_c_finalize ();
2388 cgraphunit_c_finalize ();
2389 dwarf2out_c_finalize ();
2391 ipa_cp_c_finalize ();
2392 ira_costs_c_finalize ();
2393 params_c_finalize ();
2395 finalize_options_struct (&global_options
);
2396 finalize_options_struct (&global_options_set
);
2398 /* save_decoded_options uses opts_obstack, so these must
2399 be cleaned up together. */
2400 obstack_free (&opts_obstack
, NULL
);
2401 XDELETEVEC (save_decoded_options
);
2402 save_decoded_options
= NULL
;
2403 save_decoded_options_count
= 0;
2405 /* Clean up the context (and pass_manager etc). */