1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2015 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"
34 #include "fold-const.h"
36 #include "tree-inline.h"
37 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
42 #include "insn-attr.h"
43 #include "insn-config.h"
44 #include "insn-flags.h"
45 #include "hard-reg-set.h"
61 #include "diagnostic.h"
62 #include "tree-diagnostic.h"
63 #include "tree-pretty-print.h"
68 #include "dwarf2asm.h"
71 #include "common/common-target.h"
72 #include "langhooks.h"
73 #include "cfgloop.h" /* for init_set_costs */
74 #include "hosthooks.h"
76 #include "basic-block.h"
78 #include "plugin-api.h"
82 #include "opts-diagnostic.h"
84 #include "value-prof.h"
85 #include "alloc-pool.h"
88 #include "tree-ssa-alias.h"
89 #include "internal-fn.h"
90 #include "gimple-expr.h"
94 #include "pass_manager.h"
95 #include "auto-profile.h"
96 #include "dwarf2out.h"
98 #include "ipa-reference.h"
99 #include "symbol-summary.h"
100 #include "ipa-prop.h"
102 #include "insn-codes.h"
104 #include "tree-chkp.h"
107 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
111 #ifdef SDB_DEBUGGING_INFO
115 #ifdef XCOFF_DEBUGGING_INFO
116 #include "xcoffout.h" /* Needed for external data
117 declarations for e.g. AIX 4.x. */
120 #ifndef HAVE_prologue
121 #define HAVE_prologue 0
126 static void general_init (const char *, bool);
127 static void do_compile ();
128 static void process_options (void);
129 static void backend_init (void);
130 static int lang_dependent_init (const char *);
131 static void init_asm_output (const char *);
132 static void finalize (bool);
134 static void crash_signal (int) ATTRIBUTE_NORETURN
;
135 static void compile_file (void);
137 /* True if we don't need a backend (e.g. preprocessing only). */
138 static bool no_backend
;
140 /* Length of line when printing switch values. */
143 /* Decoded options, and number of such options. */
144 struct cl_decoded_option
*save_decoded_options
;
145 unsigned int save_decoded_options_count
;
147 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
148 to optimize in process_options (). */
149 #define AUTODETECT_VALUE 2
151 /* Debug hooks - dependent upon command line options. */
153 const struct gcc_debug_hooks
*debug_hooks
;
155 /* The FUNCTION_DECL for the function currently being compiled,
156 or 0 if between functions. */
157 tree current_function_decl
;
159 /* Set to the FUNC_BEGIN label of the current function, or NULL
161 const char * current_function_func_begin_label
;
163 /* A random sequence of characters, unless overridden by user. */
164 static const char *flag_random_seed
;
166 /* A local time stamp derived from the time of compilation. It will be
167 zero if the system cannot provide a time. It will be -1u, if the
168 user has specified a particular random seed. */
171 /* Random number for this compilation */
172 HOST_WIDE_INT random_seed
;
176 /* When non-NULL, indicates that whenever space is allocated on the
177 stack, the resulting stack pointer must not pass this
178 address---that is, for stacks that grow downward, the stack pointer
179 must always be greater than or equal to this address; for stacks
180 that grow upward, the stack pointer must be less than this address.
181 At present, the rtx may be either a REG or a SYMBOL_REF, although
182 the support provided depends on the backend. */
185 /* True if the user has tagged the function with the 'section'
188 bool user_defined_section_attribute
= false;
190 struct target_flag_state default_target_flag_state
;
191 #if SWITCHABLE_TARGET
192 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
194 #define this_target_flag_state (&default_target_flag_state)
197 /* The user symbol prefix after having resolved same. */
198 const char *user_label_prefix
;
200 /* Output files for assembler code (real compiler output)
201 and debugging dumps. */
205 FILE *stack_usage_file
= NULL
;
207 /* The current working directory of a translation. It's generally the
208 directory from which compilation was initiated, but a preprocessed
209 file may specify the original directory in which it was
212 static const char *src_pwd
;
214 /* Initialize src_pwd with the given string, and return true. If it
215 was already initialized, return false. As a special case, it may
216 be called with a NULL argument to test whether src_pwd has NOT been
220 set_src_pwd (const char *pwd
)
224 if (strcmp (src_pwd
, pwd
) == 0)
230 src_pwd
= xstrdup (pwd
);
234 /* Return the directory from which the translation unit was initiated,
235 in case set_src_pwd() was not called before to assign it a
251 /* Called when the start of a function definition is parsed,
252 this function prints on stderr the name of the function. */
254 announce_function (tree decl
)
258 if (rtl_dump_and_exit
)
259 fprintf (stderr
, "%s ",
260 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
262 fprintf (stderr
, " %s",
263 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
265 pp_needs_newline (global_dc
->printer
) = true;
266 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
270 /* Initialize local_tick with a random number or -1 if
271 flag_random_seed is set. */
274 init_local_tick (void)
276 if (!flag_random_seed
)
278 /* Try urandom first. Time of day is too likely to collide.
279 In case of any error we just use the local tick. */
281 int fd
= open ("/dev/urandom", O_RDONLY
);
284 if (read (fd
, &random_seed
, sizeof (random_seed
))
285 != sizeof (random_seed
))
290 /* Now get the tick anyways */
291 #ifdef HAVE_GETTIMEOFDAY
295 gettimeofday (&tv
, NULL
);
296 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
300 time_t now
= time (NULL
);
302 if (now
!= (time_t)-1)
303 local_tick
= (unsigned) now
;
311 /* Set up a default flag_random_seed and local_tick, unless the user
312 already specified one. Must be called after init_local_tick. */
315 init_random_seed (void)
318 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
321 /* Obtain the random_seed. Unless NOINIT, initialize it if
322 it's not provided in the command line. */
325 get_random_seed (bool noinit
)
327 if (!flag_random_seed
&& !noinit
)
332 /* Modify the random_seed string to VAL. Return its previous
336 set_random_seed (const char *val
)
338 const char *old
= flag_random_seed
;
339 flag_random_seed
= val
;
340 if (flag_random_seed
)
344 /* When the driver passed in a hex number don't crc it again */
345 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
346 if (!(endp
> flag_random_seed
&& *endp
== 0))
347 random_seed
= crc32_string (0, flag_random_seed
);
352 /* Handler for fatal signals, such as SIGSEGV. These are transformed
353 into ICE messages, which is much more user friendly. In case the
354 error printer crashes, reset the signal to prevent infinite recursion. */
357 crash_signal (int signo
)
359 signal (signo
, SIG_DFL
);
361 /* If we crashed while processing an ASM statement, then be a little more
362 graceful. It's most likely the user's fault. */
363 if (this_is_asm_operands
)
365 output_operand_lossage ("unrecoverable error");
366 exit (FATAL_EXIT_CODE
);
369 internal_error ("%s", strsignal (signo
));
372 /* A subroutine of wrapup_global_declarations. We've come to the end of
373 the compilation unit. All deferred variables should be undeferred,
374 and all incomplete decls should be finalized. */
377 wrapup_global_declaration_1 (tree decl
)
379 /* We're not deferring this any longer. Assignment is conditional to
380 avoid needlessly dirtying PCH pages. */
381 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
382 && DECL_DEFER_OUTPUT (decl
) != 0)
383 DECL_DEFER_OUTPUT (decl
) = 0;
385 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
386 lang_hooks
.finish_incomplete_decl (decl
);
389 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
390 needs to be output. Return true if it is output. */
393 wrapup_global_declaration_2 (tree decl
)
395 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
396 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
399 /* Don't write out static consts, unless we still need them.
401 We also keep static consts if not optimizing (for debugging),
402 unless the user specified -fno-keep-static-consts.
403 ??? They might be better written into the debug information.
404 This is possible when using DWARF.
406 A language processor that wants static constants to be always
407 written out (even if it is not used) is responsible for
408 calling rest_of_decl_compilation itself. E.g. the C front-end
409 calls rest_of_decl_compilation from finish_decl.
410 One motivation for this is that is conventional in some
411 environments to write things like:
412 static const char rcsid[] = "... version string ...";
413 intending to force the string to be in the executable.
415 A language processor that would prefer to have unneeded
416 static constants "optimized away" would just defer writing
417 them out until here. E.g. C++ does this, because static
418 constants are often defined in header files.
420 ??? A tempting alternative (for both C and C++) would be
421 to force a constant to be written if and only if it is
422 defined in a main file, as opposed to an include file. */
424 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
428 node
= varpool_node::get (decl
);
430 if (!node
&& flag_ltrans
)
432 else if (node
&& node
->definition
)
434 else if (node
&& node
->alias
)
436 else if (!symtab
->global_info_ready
438 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
440 else if (node
&& node
->analyzed
)
442 else if (DECL_COMDAT (decl
))
444 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
445 && (optimize
|| !flag_keep_static_consts
446 || DECL_ARTIFICIAL (decl
)))
451 rest_of_decl_compilation (decl
, 1, 1);
459 /* Do any final processing required for the declarations in VEC, of
460 which there are LEN. We write out inline functions and variables
461 that have been deferred until this point, but which are required.
462 Returns nonzero if anything was put out. */
465 wrapup_global_declarations (tree
*vec
, int len
)
467 bool reconsider
, output_something
= false;
470 for (i
= 0; i
< len
; i
++)
471 wrapup_global_declaration_1 (vec
[i
]);
473 /* Now emit any global variables or functions that we have been
474 putting off. We need to loop in case one of the things emitted
475 here references another one which comes earlier in the list. */
479 for (i
= 0; i
< len
; i
++)
480 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
482 output_something
= true;
486 return output_something
;
489 /* Issue appropriate warnings for the global declaration DECL. */
492 check_global_declaration (tree decl
)
494 /* Warn about any function declared static but not defined. We don't
495 warn about variables, because many programs have static variables
496 that exist only to get some text into the object file. */
497 symtab_node
*snode
= symtab_node::get (decl
);
498 if (TREE_CODE (decl
) == FUNCTION_DECL
499 && DECL_INITIAL (decl
) == 0
500 && DECL_EXTERNAL (decl
)
501 && ! DECL_ARTIFICIAL (decl
)
502 && ! TREE_NO_WARNING (decl
)
503 && ! TREE_PUBLIC (decl
)
504 && (warn_unused_function
505 || snode
->referred_to_p (/*include_self=*/false)))
507 if (snode
->referred_to_p (/*include_self=*/false))
508 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
510 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
511 /* This symbol is effectively an "extern" declaration now. */
512 TREE_PUBLIC (decl
) = 1;
515 /* Warn about static fns or vars defined but not used. */
516 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
517 /* We don't warn about "static const" variables because the
518 "rcs_id" idiom uses that construction. */
519 || (warn_unused_variable
520 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
521 && ! DECL_IN_SYSTEM_HEADER (decl
)
522 && ! snode
->referred_to_p (/*include_self=*/false)
523 /* This TREE_USED check is needed in addition to referred_to_p
524 above, because the `__unused__' attribute is not being
525 considered for referred_to_p. */
526 && ! TREE_USED (decl
)
527 /* The TREE_USED bit for file-scope decls is kept in the identifier,
528 to handle multiple external decls in different scopes. */
529 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
530 && ! DECL_EXTERNAL (decl
)
531 && ! DECL_ARTIFICIAL (decl
)
532 && ! TREE_PUBLIC (decl
)
533 /* A volatile variable might be used in some non-obvious way. */
534 && ! TREE_THIS_VOLATILE (decl
)
535 /* Global register variables must be declared to reserve them. */
536 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
537 /* Global ctors and dtors are called by the runtime. */
538 && (TREE_CODE (decl
) != FUNCTION_DECL
539 || (!DECL_STATIC_CONSTRUCTOR (decl
)
540 && !DECL_STATIC_DESTRUCTOR (decl
)))
541 /* Otherwise, ask the language. */
542 && lang_hooks
.decls
.warn_unused_global (decl
))
543 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
544 ? OPT_Wunused_function
545 : OPT_Wunused_variable
,
546 "%q+D defined but not used", decl
);
549 /* Compile an entire translation unit. Write a file of assembly
550 output and various debugging dumps. */
555 timevar_start (TV_PHASE_PARSING
);
556 timevar_push (TV_PARSE_GLOBAL
);
558 /* Parse entire file and generate initial debug information. */
559 lang_hooks
.parse_file ();
561 timevar_pop (TV_PARSE_GLOBAL
);
562 timevar_stop (TV_PHASE_PARSING
);
564 if (flag_dump_locations
)
565 dump_location_info (stderr
);
567 /* Compilation is now finished except for writing
568 what's left of the symbol table output. */
570 if (flag_syntax_only
|| flag_wpa
)
573 ggc_protect_identifiers
= false;
575 /* Run the actual compilation process. */
578 timevar_start (TV_PHASE_OPT_GEN
);
579 symtab
->finalize_compilation_unit ();
580 timevar_stop (TV_PHASE_OPT_GEN
);
583 /* Perform any post compilation-proper parser cleanups and
584 processing. This is currently only needed for the C++ parser,
585 which can be hopefully cleaned up so this hook is no longer
587 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
588 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
593 /* After the parser has generated debugging information, augment
594 this information with any new location/etc information that may
595 have become available after the compilation proper. */
596 timevar_start (TV_PHASE_DBGINFO
);
598 FOR_EACH_DEFINED_SYMBOL (node
)
599 debug_hooks
->late_global_decl (node
->decl
);
600 timevar_stop (TV_PHASE_DBGINFO
);
602 timevar_start (TV_PHASE_LATE_ASM
);
604 /* Compilation unit is finalized. When producing non-fat LTO object, we are
605 basically finished. */
606 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
608 /* File-scope initialization for AddressSanitizer. */
609 if (flag_sanitize
& SANITIZE_ADDRESS
)
612 if (flag_sanitize
& SANITIZE_THREAD
)
615 if (flag_check_pointer_bounds
)
620 output_shared_constant_pool ();
621 output_object_blocks ();
622 finish_tm_clone_pairs ();
624 /* Write out any pending weak symbol declarations. */
627 /* This must be at the end before unwind and debug info.
628 Some target ports emit PIC setup thunks here. */
629 targetm
.asm_out
.code_end ();
631 /* Do dbx symbols. */
632 timevar_push (TV_SYMOUT
);
634 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
635 if (dwarf2out_do_frame ())
636 dwarf2out_frame_finish ();
639 (*debug_hooks
->finish
) (main_input_filename
);
640 timevar_pop (TV_SYMOUT
);
642 /* Output some stuff at end of file if nec. */
644 dw2_output_indirect_constants ();
646 /* Flush any pending external directives. */
647 process_pending_assemble_externals ();
650 /* Emit LTO marker if LTO info has been previously emitted. This is
651 used by collect2 to determine whether an object file contains IL.
652 We used to emit an undefined reference here, but this produces
653 link errors if an object file with IL is stored into a shared
654 library without invoking lto1. */
655 if (flag_generate_lto
|| flag_generate_offload
)
657 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
658 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
660 (unsigned HOST_WIDE_INT
) 1, 8);
661 #elif defined ASM_OUTPUT_ALIGNED_COMMON
662 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
663 (unsigned HOST_WIDE_INT
) 1, 8);
665 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
666 (unsigned HOST_WIDE_INT
) 1,
667 (unsigned HOST_WIDE_INT
) 1);
671 /* Let linker plugin know that this is a slim object and must be LTOed
672 even when user did not ask for it. */
673 if (flag_generate_lto
&& !flag_fat_lto_objects
)
675 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
676 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
677 (unsigned HOST_WIDE_INT
) 1, 8);
678 #elif defined ASM_OUTPUT_ALIGNED_COMMON
679 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
680 (unsigned HOST_WIDE_INT
) 1, 8);
682 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
683 (unsigned HOST_WIDE_INT
) 1,
684 (unsigned HOST_WIDE_INT
) 1);
688 /* Attach a special .ident directive to the end of the file to identify
689 the version of GCC which compiled this code. The format of the .ident
690 string is patterned after the ones produced by native SVR4 compilers. */
693 const char *pkg_version
= "(GNU) ";
696 if (strcmp ("(GCC) ", pkgversion_string
))
697 pkg_version
= pkgversion_string
;
699 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
700 targetm
.asm_out
.output_ident (ident_str
);
703 /* Auto profile finalization. */
704 if (flag_auto_profile
)
707 /* Invoke registered plugin callbacks. */
708 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
710 /* This must be at the end. Some target ports emit end of file directives
711 into the assembly file here, and hence we can not output anything to the
712 assembly file after this point. */
713 targetm
.asm_out
.file_end ();
715 timevar_stop (TV_PHASE_LATE_ASM
);
718 /* Print version information to FILE.
719 Each line begins with INDENT (for the case where FILE is the
720 assembler output file).
722 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
723 proper and can print pertinent state (e.g. params and plugins).
725 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
726 compiler, and we don't hold the mutex on the compiler's global state:
727 we can't print params and plugins, since they might not be initialized,
728 or might be being manipulated by a compile running in another
732 print_version (FILE *file
, const char *indent
, bool show_global_state
)
734 static const char fmt1
[] =
736 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
738 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
741 static const char fmt2
[] =
742 N_("GMP version %s, MPFR version %s, MPC version %s\n");
743 static const char fmt3
[] =
744 N_("%s%swarning: %s header version %s differs from library version %s.\n");
745 static const char fmt4
[] =
746 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
748 #define __VERSION__ "[?]"
751 file
== stderr
? _(fmt1
) : fmt1
,
752 indent
, *indent
!= 0 ? " " : "",
753 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
754 indent
, __VERSION__
);
756 /* We need to stringify the GMP macro values. Ugh, gmp_version has
757 two string formats, "i.j.k" and "i.j" when k is zero. As of
758 gmp-4.3.0, GMP always uses the 3 number format. */
759 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
760 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
761 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
762 #define GCC_GMP_VERSION \
763 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
764 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
765 #define GCC_GMP_STRINGIFY_VERSION \
766 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
767 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
769 #define GCC_GMP_STRINGIFY_VERSION \
770 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
771 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
772 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
775 file
== stderr
? _(fmt2
) : fmt2
,
776 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
777 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
779 file
== stderr
? _(fmt3
) : fmt3
,
780 indent
, *indent
!= 0 ? " " : "",
781 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
782 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
784 file
== stderr
? _(fmt3
) : fmt3
,
785 indent
, *indent
!= 0 ? " " : "",
786 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
787 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
789 file
== stderr
? _(fmt3
) : fmt3
,
790 indent
, *indent
!= 0 ? " " : "",
791 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
793 if (show_global_state
)
796 file
== stderr
? _(fmt4
) : fmt4
,
797 indent
, *indent
!= 0 ? " " : "",
798 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
800 print_plugins_versions (file
, indent
);
805 print_to_asm_out_file (print_switch_type type
, const char * text
)
807 bool prepend_sep
= true;
811 case SWITCH_TYPE_LINE_END
:
812 putc ('\n', asm_out_file
);
815 case SWITCH_TYPE_LINE_START
:
816 fputs (ASM_COMMENT_START
, asm_out_file
);
817 return strlen (ASM_COMMENT_START
);
819 case SWITCH_TYPE_DESCRIPTIVE
:
820 if (ASM_COMMENT_START
[0] == 0)
823 case SWITCH_TYPE_PASSED
:
824 case SWITCH_TYPE_ENABLED
:
826 fputc (' ', asm_out_file
);
827 fputs (text
, asm_out_file
);
828 /* No need to return the length here as
829 print_single_switch has already done it. */
838 print_to_stderr (print_switch_type type
, const char * text
)
842 case SWITCH_TYPE_LINE_END
:
846 case SWITCH_TYPE_LINE_START
:
849 case SWITCH_TYPE_PASSED
:
850 case SWITCH_TYPE_ENABLED
:
854 case SWITCH_TYPE_DESCRIPTIVE
:
855 fputs (text
, stderr
);
856 /* No need to return the length here as
857 print_single_switch has already done it. */
865 /* Print an option value and return the adjusted position in the line.
866 ??? print_fn doesn't handle errors, eg disk full; presumably other
867 code will catch a disk full though. */
870 print_single_switch (print_switch_fn_type print_fn
,
872 print_switch_type type
,
875 /* The ultrix fprintf returns 0 on success, so compute the result
876 we want here since we need it for the following test. The +1
877 is for the separator character that will probably be emitted. */
878 int len
= strlen (text
) + 1;
881 && pos
+ len
> MAX_LINE
)
883 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
888 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
890 print_fn (type
, text
);
894 /* Print active target switches using PRINT_FN.
895 POS is the current cursor position and MAX is the size of a "line".
896 Each line begins with INDENT and ends with TERM.
897 Each switch is separated from the next by SEP. */
900 print_switch_values (print_switch_fn_type print_fn
)
905 /* Fill in the -frandom-seed option, if the user didn't pass it, so
906 that it can be printed below. This helps reproducibility. */
907 if (!flag_random_seed
)
910 /* Print the options as passed. */
911 pos
= print_single_switch (print_fn
, pos
,
912 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
914 for (j
= 1; j
< save_decoded_options_count
; j
++)
916 switch (save_decoded_options
[j
].opt_index
)
929 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
930 save_decoded_options
[j
].orig_option_with_args_text
);
934 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
936 /* Print the -f and -m options that have been enabled.
937 We don't handle language specific options but printing argv
939 pos
= print_single_switch (print_fn
, 0,
940 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
942 for (j
= 0; j
< cl_options_count
; j
++)
943 if (cl_options
[j
].cl_report
944 && option_enabled (j
, &global_options
) > 0)
945 pos
= print_single_switch (print_fn
, pos
,
946 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
948 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
951 /* Open assembly code output file. Do this even if -fsyntax-only is
952 on, because then the driver will have provided the name of a
953 temporary file or bit bucket for us. NAME is the file specified on
954 the command line, possibly NULL. */
956 init_asm_output (const char *name
)
958 if (name
== NULL
&& asm_file_name
== 0)
959 asm_out_file
= stdout
;
962 if (asm_file_name
== 0)
964 int len
= strlen (dump_base_name
);
965 char *dumpname
= XNEWVEC (char, len
+ 6);
967 memcpy (dumpname
, dump_base_name
, len
+ 1);
968 strip_off_ending (dumpname
, len
);
969 strcat (dumpname
, ".s");
970 asm_file_name
= dumpname
;
972 if (!strcmp (asm_file_name
, "-"))
973 asm_out_file
= stdout
;
974 else if (!canonical_filename_eq (asm_file_name
, name
)
975 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
976 asm_out_file
= fopen (asm_file_name
, "w");
978 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
979 line in the current file. */
980 fatal_error (UNKNOWN_LOCATION
,
981 "input file %qs is the same as output file",
983 if (asm_out_file
== 0)
984 fatal_error (UNKNOWN_LOCATION
,
985 "can%'t open %qs for writing: %m", asm_file_name
);
988 if (!flag_syntax_only
)
990 targetm
.asm_out
.file_start ();
992 if (flag_record_gcc_switches
)
994 if (targetm
.asm_out
.record_gcc_switches
)
996 /* Let the target know that we are about to start recording. */
997 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
999 /* Now record the switches. */
1000 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1001 /* Let the target know that the recording is over. */
1002 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1006 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
1009 if (flag_verbose_asm
)
1011 /* Print the list of switches in effect
1012 into the assembler file as comments. */
1013 print_version (asm_out_file
, ASM_COMMENT_START
, true);
1014 print_switch_values (print_to_asm_out_file
);
1015 putc ('\n', asm_out_file
);
1020 /* A helper function; used as the reallocator function for cpp's line
1023 realloc_for_line_map (void *ptr
, size_t len
)
1025 return ggc_realloc (ptr
, len
);
1028 /* A helper function: used as the allocator function for
1029 identifier_to_locale. */
1031 alloc_for_identifier_to_locale (size_t len
)
1033 return ggc_alloc_atomic (len
);
1036 /* Output stack usage information. */
1038 output_stack_usage (void)
1040 static bool warning_issued
= false;
1041 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
1042 const char *stack_usage_kind_str
[] = {
1047 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
1048 enum stack_usage_kind_type stack_usage_kind
;
1050 if (stack_usage
< 0)
1052 if (!warning_issued
)
1054 warning (0, "stack usage computation not supported for this target");
1055 warning_issued
= true;
1060 stack_usage_kind
= STATIC
;
1062 /* Add the maximum amount of space pushed onto the stack. */
1063 if (current_function_pushed_stack_size
> 0)
1065 stack_usage
+= current_function_pushed_stack_size
;
1066 stack_usage_kind
= DYNAMIC_BOUNDED
;
1069 /* Now on to the tricky part: dynamic stack allocation. */
1070 if (current_function_allocates_dynamic_stack_space
)
1072 if (current_function_has_unbounded_dynamic_stack_size
)
1073 stack_usage_kind
= DYNAMIC
;
1075 stack_usage_kind
= DYNAMIC_BOUNDED
;
1077 /* Add the size even in the unbounded case, this can't hurt. */
1078 stack_usage
+= current_function_dynamic_stack_size
;
1081 if (flag_stack_usage
)
1083 expanded_location loc
1084 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1085 /* We don't want to print the full qualified name because it can be long,
1086 so we strip the scope prefix, but we may need to deal with the suffix
1087 created by the compiler. */
1089 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1091 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1094 const char *dot
= strchr (name
, '.');
1095 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1098 dot
= strchr (name
, '.');
1103 const char *dot
= strrchr (name
, '.');
1108 fprintf (stack_usage_file
,
1109 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1110 lbasename (loc
.file
),
1115 stack_usage_kind_str
[stack_usage_kind
]);
1118 if (warn_stack_usage
>= 0)
1120 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1122 if (stack_usage_kind
== DYNAMIC
)
1123 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1124 else if (stack_usage
> warn_stack_usage
)
1126 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1128 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1131 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1137 /* Open an auxiliary output file. */
1139 open_auxiliary_file (const char *ext
)
1144 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1145 file
= fopen (filename
, "w");
1147 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1152 /* Initialization of the front end environment, before command line
1153 options are parsed. Signal handlers, internationalization etc.
1154 ARGV0 is main's argv[0]. */
1156 general_init (const char *argv0
, bool init_signals
)
1160 p
= argv0
+ strlen (argv0
);
1161 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1165 xmalloc_set_program_name (progname
);
1169 /* Unlock the stdio streams. */
1170 unlock_std_streams ();
1172 gcc_init_libintl ();
1174 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1175 identifier_to_locale_free
= ggc_free
;
1177 /* Initialize the diagnostics reporting machinery, so option parsing
1178 can give warnings and errors. */
1179 diagnostic_initialize (global_dc
, N_OPTS
);
1180 /* Set a default printer. Language specific initializations will
1181 override it later. */
1182 tree_diagnostics_defaults (global_dc
);
1184 global_dc
->show_caret
1185 = global_options_init
.x_flag_diagnostics_show_caret
;
1186 global_dc
->show_option_requested
1187 = global_options_init
.x_flag_diagnostics_show_option
;
1188 global_dc
->show_column
1189 = global_options_init
.x_flag_show_column
;
1190 global_dc
->internal_error
= plugins_internal_error_function
;
1191 global_dc
->option_enabled
= option_enabled
;
1192 global_dc
->option_state
= &global_options
;
1193 global_dc
->option_name
= option_name
;
1197 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1199 signal (SIGSEGV
, crash_signal
);
1202 signal (SIGILL
, crash_signal
);
1205 signal (SIGBUS
, crash_signal
);
1208 signal (SIGABRT
, crash_signal
);
1210 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1211 signal (SIGIOT
, crash_signal
);
1214 signal (SIGFPE
, crash_signal
);
1217 /* Other host-specific signal setup. */
1218 (*host_hooks
.extra_signals
)();
1221 /* Initialize the garbage-collector, string pools and tree type hash
1225 input_location
= UNKNOWN_LOCATION
;
1226 line_table
= ggc_alloc
<line_maps
> ();
1227 linemap_init (line_table
, BUILTINS_LOCATION
);
1228 line_table
->reallocator
= realloc_for_line_map
;
1229 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1232 /* Initialize register usage now so switches may override. */
1235 /* Register the language-independent parameters. */
1236 global_init_params ();
1238 /* This must be done after global_init_params but before argument
1240 init_ggc_heuristics ();
1242 /* Create the singleton holder for global state.
1243 Doing so also creates the pass manager and with it the passes. */
1244 g
= new gcc::context ();
1245 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1247 statistics_early_init ();
1251 /* Return true if the current target supports -fsection-anchors. */
1254 target_supports_section_anchors_p (void)
1256 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1259 if (targetm
.asm_out
.output_anchor
== NULL
)
1265 /* Default the align_* variables to 1 if they're still unset, and
1266 set up the align_*_log variables. */
1268 init_alignments (void)
1270 if (align_loops
<= 0)
1272 if (align_loops_max_skip
> align_loops
)
1273 align_loops_max_skip
= align_loops
- 1;
1274 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1275 if (align_jumps
<= 0)
1277 if (align_jumps_max_skip
> align_jumps
)
1278 align_jumps_max_skip
= align_jumps
- 1;
1279 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1280 if (align_labels
<= 0)
1282 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1283 if (align_labels_max_skip
> align_labels
)
1284 align_labels_max_skip
= align_labels
- 1;
1285 if (align_functions
<= 0)
1286 align_functions
= 1;
1287 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1290 /* Process the options that have been parsed. */
1292 process_options (void)
1294 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1295 This can happen with incorrect pre-processed input. */
1296 debug_hooks
= &do_nothing_debug_hooks
;
1298 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1300 /* Allow the front end to perform consistency checks and do further
1301 initialization based on the command line options. This hook also
1302 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1303 so we can correctly initialize debug output. */
1304 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1306 /* Set default values for parameters relation to the Scalar Reduction
1307 of Aggregates passes (SRA and IP-SRA). We must do this here, rather
1308 than in opts.c:default_options_optimization as historically these
1309 tuning heuristics have been based on MOVE_RATIO, which on some
1310 targets requires other symbols from the backend. */
1311 maybe_set_param_value
1312 (PARAM_SRA_MAX_SCALARIZATION_SIZE_SPEED
,
1313 get_move_ratio (true) * UNITS_PER_WORD
,
1314 global_options
.x_param_values
, global_options_set
.x_param_values
);
1315 maybe_set_param_value
1316 (PARAM_SRA_MAX_SCALARIZATION_SIZE_SIZE
,
1317 get_move_ratio (false) * UNITS_PER_WORD
,
1318 global_options
.x_param_values
, global_options_set
.x_param_values
);
1320 /* Some machines may reject certain combinations of options. */
1321 targetm
.target_option
.override ();
1323 /* Avoid any informative notes in the second run of -fcompare-debug. */
1324 if (flag_compare_debug
)
1325 diagnostic_inhibit_notes (global_dc
);
1327 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1329 warning (OPT_fsection_anchors
,
1330 "this target does not support %qs", "-fsection-anchors");
1331 flag_section_anchors
= 0;
1334 if (flag_short_enums
== 2)
1335 flag_short_enums
= targetm
.default_short_enums ();
1337 /* Set aux_base_name if not already set. */
1340 else if (main_input_filename
)
1342 char *name
= xstrdup (lbasename (main_input_filename
));
1344 strip_off_ending (name
, strlen (name
));
1345 aux_base_name
= name
;
1348 aux_base_name
= "gccaux";
1352 || flag_graphite_identity
1354 || flag_loop_interchange
1355 || flag_loop_strip_mine
1356 || flag_loop_parallelize_all
1357 || flag_loop_unroll_jam
)
1358 sorry ("Graphite loop optimizations cannot be used (ISL is not available)"
1359 "(-fgraphite, -fgraphite-identity, -floop-block, "
1360 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1361 "-floop-unroll-and-jam, and -ftree-loop-linear)");
1364 if (flag_check_pointer_bounds
)
1366 if (targetm
.chkp_bound_mode () == VOIDmode
)
1368 error ("-fcheck-pointer-bounds is not supported for this target");
1369 flag_check_pointer_bounds
= 0;
1372 if (flag_sanitize
& SANITIZE_ADDRESS
)
1374 error ("-fcheck-pointer-bounds is not supported with "
1375 "Address Sanitizer");
1376 flag_check_pointer_bounds
= 0;
1380 /* One region RA really helps to decrease the code size. */
1381 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1383 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1385 if (!abi_version_at_least (2))
1387 /* -fabi-version=1 support was removed after GCC 4.9. */
1388 error ("%<-fabi-version=1%> is no longer supported");
1389 flag_abi_version
= 2;
1392 /* Unrolling all loops implies that standard loop unrolling must also
1394 if (flag_unroll_all_loops
)
1395 flag_unroll_loops
= 1;
1397 /* web and rename-registers help when run after loop unrolling. */
1398 if (flag_web
== AUTODETECT_VALUE
)
1399 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1401 if (flag_rename_registers
== AUTODETECT_VALUE
)
1402 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1404 if (flag_non_call_exceptions
)
1405 flag_asynchronous_unwind_tables
= 1;
1406 if (flag_asynchronous_unwind_tables
)
1407 flag_unwind_tables
= 1;
1409 if (flag_value_profile_transformations
)
1410 flag_profile_values
= 1;
1412 /* Warn about options that are not supported on this machine. */
1413 #ifndef INSN_SCHEDULING
1414 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1415 warning (0, "instruction scheduling not supported on this target machine");
1418 if (flag_delayed_branch
)
1419 warning (0, "this target machine does not have delayed branches");
1422 user_label_prefix
= USER_LABEL_PREFIX
;
1423 if (flag_leading_underscore
!= -1)
1425 /* If the default prefix is more complicated than "" or "_",
1426 issue a warning and ignore this option. */
1427 if (user_label_prefix
[0] == 0 ||
1428 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1430 user_label_prefix
= flag_leading_underscore
? "_" : "";
1433 warning (0, "-f%sleading-underscore not supported on this target machine",
1434 flag_leading_underscore
? "" : "no-");
1437 /* If we are in verbose mode, write out the version and maybe all the
1438 option flags in use. */
1441 print_version (stderr
, "", true);
1443 print_switch_values (print_to_stderr
);
1446 if (flag_syntax_only
)
1448 write_symbols
= NO_DEBUG
;
1454 if (debug_info_level
== DINFO_LEVEL_NONE
)
1456 debug_info_level
= DINFO_LEVEL_NORMAL
;
1458 if (write_symbols
== NO_DEBUG
)
1459 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1462 debug_info_level
= DINFO_LEVEL_NONE
;
1465 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1467 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1470 error ("could not open final insn dump file %qs: %m",
1471 flag_dump_final_insns
);
1472 flag_dump_final_insns
= NULL
;
1474 else if (fclose (final_output
))
1476 error ("could not close zeroed insn dump file %qs: %m",
1477 flag_dump_final_insns
);
1478 flag_dump_final_insns
= NULL
;
1482 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1484 if (debug_info_level
== DINFO_LEVEL_NONE
)
1485 write_symbols
= NO_DEBUG
;
1487 if (write_symbols
== NO_DEBUG
)
1489 #if defined(DBX_DEBUGGING_INFO)
1490 else if (write_symbols
== DBX_DEBUG
)
1491 debug_hooks
= &dbx_debug_hooks
;
1493 #if defined(XCOFF_DEBUGGING_INFO)
1494 else if (write_symbols
== XCOFF_DEBUG
)
1495 debug_hooks
= &xcoff_debug_hooks
;
1497 #ifdef SDB_DEBUGGING_INFO
1498 else if (write_symbols
== SDB_DEBUG
)
1499 debug_hooks
= &sdb_debug_hooks
;
1501 #ifdef DWARF2_DEBUGGING_INFO
1502 else if (write_symbols
== DWARF2_DEBUG
)
1503 debug_hooks
= &dwarf2_debug_hooks
;
1505 #ifdef VMS_DEBUGGING_INFO
1506 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1507 debug_hooks
= &vmsdbg_debug_hooks
;
1510 error ("target system does not support the %qs debug format",
1511 debug_type_names
[write_symbols
]);
1513 /* We know which debug output will be used so we can set flag_var_tracking
1514 and flag_var_tracking_uninit if the user has not specified them. */
1515 if (debug_info_level
< DINFO_LEVEL_NORMAL
1516 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1518 if (flag_var_tracking
== 1
1519 || flag_var_tracking_uninit
== 1)
1521 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1522 warning (0, "variable tracking requested, but useless unless "
1523 "producing debug info");
1525 warning (0, "variable tracking requested, but not supported "
1526 "by this debug format");
1528 flag_var_tracking
= 0;
1529 flag_var_tracking_uninit
= 0;
1532 /* The debug hooks are used to implement -fdump-go-spec because it
1533 gives a simple and stable API for all the information we need to
1535 if (flag_dump_go_spec
!= NULL
)
1536 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1538 /* If the user specifically requested variable tracking with tagging
1539 uninitialized variables, we need to turn on variable tracking.
1540 (We already determined above that variable tracking is feasible.) */
1541 if (flag_var_tracking_uninit
== 1)
1542 flag_var_tracking
= 1;
1544 if (flag_var_tracking
== AUTODETECT_VALUE
)
1545 flag_var_tracking
= optimize
>= 1;
1547 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1548 flag_var_tracking_uninit
= flag_var_tracking
;
1550 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1551 flag_var_tracking_assignments
= flag_var_tracking
1552 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1554 if (flag_var_tracking_assignments_toggle
)
1555 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1557 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1558 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1560 if (flag_var_tracking_assignments
1561 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1562 warning (0, "var-tracking-assignments changes selective scheduling");
1564 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1566 if (HAVE_conditional_move
)
1567 flag_tree_cselim
= 1;
1569 flag_tree_cselim
= 0;
1572 /* If auxiliary info generation is desired, open the output file.
1573 This goes in the same directory as the source file--unlike
1574 all the other output files. */
1575 if (flag_gen_aux_info
)
1577 aux_info_file
= fopen (aux_info_file_name
, "w");
1578 if (aux_info_file
== 0)
1579 fatal_error (input_location
, "can%'t open %s: %m", aux_info_file_name
);
1582 if (!targetm_common
.have_named_sections
)
1584 if (flag_function_sections
)
1586 warning (0, "-ffunction-sections not supported for this target");
1587 flag_function_sections
= 0;
1589 if (flag_data_sections
)
1591 warning (0, "-fdata-sections not supported for this target");
1592 flag_data_sections
= 0;
1596 #ifndef HAVE_prefetch
1597 if (flag_prefetch_loop_arrays
> 0)
1599 warning (0, "-fprefetch-loop-arrays not supported for this target");
1600 flag_prefetch_loop_arrays
= 0;
1603 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1605 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1606 flag_prefetch_loop_arrays
= 0;
1610 /* This combination of options isn't handled for i386 targets and doesn't
1611 make much sense anyway, so don't allow it. */
1612 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1614 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1615 flag_prefetch_loop_arrays
= 0;
1618 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1619 if (flag_signaling_nans
)
1620 flag_trapping_math
= 1;
1622 /* We cannot reassociate if we want traps or signed zeros. */
1623 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1625 warning (0, "-fassociative-math disabled; other options take precedence");
1626 flag_associative_math
= 0;
1629 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1630 if (flag_cx_limited_range
)
1631 flag_complex_method
= 0;
1633 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1634 if (flag_cx_fortran_rules
)
1635 flag_complex_method
= 1;
1637 /* Targets must be able to place spill slots at lower addresses. If the
1638 target already uses a soft frame pointer, the transition is trivial. */
1639 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1641 warning (0, "-fstack-protector not supported for this target");
1642 flag_stack_protect
= 0;
1644 if (!flag_stack_protect
)
1645 warn_stack_protect
= 0;
1647 /* Address Sanitizer needs porting to each target architecture. */
1649 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1650 && !FRAME_GROWS_DOWNWARD
)
1653 "-fsanitize=address and -fsanitize=kernel-address "
1654 "are not supported for this target");
1655 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1658 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1659 && targetm
.asan_shadow_offset
== NULL
)
1661 warning (0, "-fsanitize=address not supported for this target");
1662 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1665 /* Do not use IPA optimizations for register allocation if profiler is active
1666 or port does not emit prologue and epilogue as RTL. */
1667 if (profile_flag
|| !HAVE_prologue
|| !HAVE_epilogue
)
1670 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1671 have not been set. */
1672 if (!global_options_set
.x_warnings_are_errors
1673 && warn_coverage_mismatch
1674 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1676 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1677 DK_ERROR
, UNKNOWN_LOCATION
);
1679 /* Save the current optimization options. */
1680 optimization_default_node
= build_optimization_node (&global_options
);
1681 optimization_current_node
= optimization_default_node
;
1683 /* Please don't change global_options after this point, those changes won't
1684 be reflected in optimization_{default,current}_node. */
1687 /* This function can be called multiple times to reinitialize the compiler
1688 back end when register classes or instruction sets have changed,
1689 before each function. */
1691 backend_init_target (void)
1693 /* Initialize alignment variables. */
1696 /* This depends on stack_pointer_rtx. */
1697 init_fake_stack_mems ();
1699 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1701 init_alias_target ();
1703 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1706 /* Depends on the enabled attribute. */
1709 /* The following initialization functions need to generate rtl, so
1710 provide a dummy function context for them. */
1711 init_dummy_function_start ();
1713 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1714 on a mode change. */
1716 init_lower_subreg ();
1719 init_expr_target ();
1722 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1723 after a mode change as well. */
1724 caller_save_initialized_p
= false;
1726 expand_dummy_function_end ();
1729 /* Initialize the compiler back end. This function is called only once,
1730 when starting the compiler. */
1737 init_inline_once ();
1738 init_varasm_once ();
1739 save_register_info ();
1741 /* Middle end needs this initialization for default mem attributes
1742 used by early calls to make_decl_rtl. */
1745 /* Middle end needs this initialization for mode tables used to assign
1746 modes to vector variables. */
1750 /* Initialize excess precision settings. */
1752 init_excess_precision (void)
1754 /* Adjust excess precision handling based on the target options. If
1755 the front end cannot handle it, flag_excess_precision_cmdline
1756 will already have been set accordingly in the post_options
1758 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1759 flag_excess_precision
= flag_excess_precision_cmdline
;
1760 if (flag_unsafe_math_optimizations
)
1761 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1762 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1764 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1765 switch (flt_eval_method
)
1769 /* Either the target acts unpredictably (-1) or has all the
1770 operations required not to have excess precision (0). */
1771 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1775 /* In these cases, predictable excess precision makes
1779 /* Any other implementation-defined FLT_EVAL_METHOD values
1780 require the compiler to handle the associated excess
1781 precision rules in excess_precision_type. */
1787 /* Initialize things that are both lang-dependent and target-dependent.
1788 This function can be called more than once if target parameters change. */
1790 lang_dependent_init_target (void)
1792 /* This determines excess precision settings. */
1793 init_excess_precision ();
1795 /* This creates various _DECL nodes, so needs to be called after the
1796 front end is initialized. It also depends on the HAVE_xxx macros
1797 generated from the target machine description. */
1800 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1803 /* Perform initializations that are lang-dependent or target-dependent.
1804 but matters only for late optimizations and RTL generation. */
1806 static int rtl_initialized
;
1809 initialize_rtl (void)
1811 auto_timevar
tv (TV_INITIALIZE_RTL
);
1813 /* Initialization done just once per compilation, but delayed
1814 till code generation. */
1815 if (!rtl_initialized
)
1817 rtl_initialized
= true;
1819 /* Target specific RTL backend initialization. */
1820 if (!this_target_rtl
->target_specific_initialized
)
1822 backend_init_target ();
1823 this_target_rtl
->target_specific_initialized
= true;
1827 /* Language-dependent initialization. Returns nonzero on success. */
1829 lang_dependent_init (const char *name
)
1831 location_t save_loc
= input_location
;
1832 if (dump_base_name
== 0)
1833 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1835 /* Other front-end initialization. */
1836 input_location
= BUILTINS_LOCATION
;
1837 if (lang_hooks
.init () == 0)
1839 input_location
= save_loc
;
1843 init_asm_output (name
);
1845 /* If stack usage information is desired, open the output file. */
1846 if (flag_stack_usage
)
1847 stack_usage_file
= open_auxiliary_file ("su");
1850 /* This creates various _DECL nodes, so needs to be called after the
1851 front end is initialized. */
1854 /* Do the target-specific parts of the initialization. */
1855 lang_dependent_init_target ();
1859 /* If dbx symbol table desired, initialize writing it and output the
1860 predefined types. */
1861 timevar_push (TV_SYMOUT
);
1863 /* Now we have the correct original filename, we can initialize
1865 (*debug_hooks
->init
) (name
);
1867 timevar_pop (TV_SYMOUT
);
1874 /* Reinitialize everything when target parameters, such as register usage,
1877 target_reinit (void)
1879 struct rtl_data saved_x_rtl
;
1880 rtx
*saved_regno_reg_rtx
;
1881 tree saved_optimization_current_node
;
1882 struct target_optabs
*saved_this_fn_optabs
;
1884 /* Temporarily switch to the default optimization node, so that
1885 *this_target_optabs is set to the default, not reflecting
1886 whatever a previous function used for the optimize
1888 saved_optimization_current_node
= optimization_current_node
;
1889 saved_this_fn_optabs
= this_fn_optabs
;
1890 if (saved_optimization_current_node
!= optimization_default_node
)
1892 optimization_current_node
= optimization_default_node
;
1893 cl_optimization_restore
1895 TREE_OPTIMIZATION (optimization_default_node
));
1897 this_fn_optabs
= this_target_optabs
;
1899 /* Save *crtl and regno_reg_rtx around the reinitialization
1900 to allow target_reinit being called even after prepare_function_start. */
1901 saved_regno_reg_rtx
= regno_reg_rtx
;
1902 if (saved_regno_reg_rtx
)
1904 saved_x_rtl
= *crtl
;
1905 memset (crtl
, '\0', sizeof (*crtl
));
1906 regno_reg_rtx
= NULL
;
1909 this_target_rtl
->target_specific_initialized
= false;
1911 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1912 to initialize reg_raw_mode[]. */
1915 /* This invokes target hooks to set fixed_reg[] etc, which is
1919 /* Reinitialize lang-dependent parts. */
1920 lang_dependent_init_target ();
1922 /* Restore the original optimization node. */
1923 if (saved_optimization_current_node
!= optimization_default_node
)
1925 optimization_current_node
= saved_optimization_current_node
;
1926 cl_optimization_restore (&global_options
,
1927 TREE_OPTIMIZATION (optimization_current_node
));
1929 this_fn_optabs
= saved_this_fn_optabs
;
1931 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1932 expand_dummy_function_end clears it. */
1933 if (saved_regno_reg_rtx
)
1935 *crtl
= saved_x_rtl
;
1936 regno_reg_rtx
= saved_regno_reg_rtx
;
1937 saved_regno_reg_rtx
= NULL
;
1942 dump_memory_report (bool final
)
1944 dump_line_table_statistics ();
1945 ggc_print_statistics ();
1946 stringpool_statistics ();
1947 dump_tree_statistics ();
1948 dump_gimple_statistics ();
1949 dump_rtx_statistics ();
1950 dump_alloc_pool_statistics ();
1951 dump_bitmap_statistics ();
1952 dump_hash_table_loc_statistics ();
1953 dump_vec_loc_statistics ();
1954 dump_ggc_loc_statistics (final
);
1955 dump_alias_stats (stderr
);
1956 dump_pta_stats (stderr
);
1959 /* Clean up: close opened files, etc. */
1962 finalize (bool no_backend
)
1964 /* Close the dump files. */
1965 if (flag_gen_aux_info
)
1967 fclose (aux_info_file
);
1969 unlink (aux_info_file_name
);
1972 /* Close non-debugging input and output files. Take special care to note
1973 whether fclose returns an error, since the pages might still be on the
1974 buffer chain while the file is open. */
1978 if (ferror (asm_out_file
) != 0)
1979 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
1980 if (fclose (asm_out_file
) != 0)
1981 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
1984 if (stack_usage_file
)
1985 fclose (stack_usage_file
);
1991 g
->get_passes ()->finish_optimization_passes ();
1997 dump_memory_report (true);
2000 dump_profile_report ();
2002 /* Language-specific end of compilation actions. */
2003 lang_hooks
.finish ();
2007 standard_type_bitsize (int bitsize
)
2009 /* As a special exception, we always want __int128 enabled if possible. */
2012 if (bitsize
== CHAR_TYPE_SIZE
2013 || bitsize
== SHORT_TYPE_SIZE
2014 || bitsize
== INT_TYPE_SIZE
2015 || bitsize
== LONG_TYPE_SIZE
2016 || bitsize
== LONG_LONG_TYPE_SIZE
)
2021 /* Initialize the compiler, and compile the input file. */
2027 /* Don't do any more if an error has already occurred. */
2032 timevar_start (TV_PHASE_SETUP
);
2034 /* This must be run always, because it is needed to compute the FP
2035 predefined macros, such as __LDBL_MAX__, for targets using non
2036 default FP formats. */
2037 init_adjust_machine_modes ();
2038 init_derived_machine_modes ();
2040 /* This must happen after the backend has a chance to process
2041 command line options, but before the parsers are
2043 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2044 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2045 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2046 int_n_enabled_p
[i
] = true;
2048 int_n_enabled_p
[i
] = false;
2050 /* Set up the back-end if requested. */
2054 /* Language-dependent initialization. Returns true on success. */
2055 if (lang_dependent_init (main_input_filename
))
2057 /* Initialize yet another pass. */
2059 ggc_protect_identifiers
= true;
2061 symtab
->initialize ();
2062 init_final (main_input_filename
);
2063 coverage_init (aux_base_name
);
2065 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2067 timevar_stop (TV_PHASE_SETUP
);
2073 timevar_stop (TV_PHASE_SETUP
);
2076 timevar_start (TV_PHASE_FINALIZE
);
2078 finalize (no_backend
);
2080 timevar_stop (TV_PHASE_FINALIZE
);
2084 toplev::toplev (bool use_TV_TOTAL
, bool init_signals
)
2085 : m_use_TV_TOTAL (use_TV_TOTAL
),
2086 m_init_signals (init_signals
)
2088 if (!m_use_TV_TOTAL
)
2096 g_timer
->stop (TV_TOTAL
);
2097 g_timer
->print (stderr
);
2102 toplev::start_timevars ()
2104 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2107 timevar_start (TV_TOTAL
);
2110 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2111 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2112 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2114 It is not safe to call this function more than once. */
2117 toplev::main (int argc
, char **argv
)
2119 /* Parsing and gimplification sometimes need quite large stack.
2120 Increase stack size limits if possible. */
2121 stack_limit_increase (64 * 1024 * 1024);
2123 expandargv (&argc
, &argv
);
2125 /* Initialization of GCC's environment, and diagnostics. */
2126 general_init (argv
[0], m_init_signals
);
2128 /* One-off initialization of options that does not need to be
2129 repeated when options are added for particular functions. */
2130 init_options_once ();
2132 /* Initialize global options structures; this must be repeated for
2133 each structure used for parsing options. */
2134 init_options_struct (&global_options
, &global_options_set
);
2135 lang_hooks
.init_options_struct (&global_options
);
2137 /* Convert the options to an array. */
2138 decode_cmdline_options_to_array_default_mask (argc
,
2139 CONST_CAST2 (const char **,
2141 &save_decoded_options
,
2142 &save_decoded_options_count
);
2144 /* Perform language-specific options initialization. */
2145 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2147 /* Parse the options and do minimal processing; basically just
2148 enough to default flags appropriately. */
2149 decode_options (&global_options
, &global_options_set
,
2150 save_decoded_options
, save_decoded_options_count
,
2151 UNKNOWN_LOCATION
, global_dc
);
2153 handle_common_deferred_options ();
2157 initialize_plugins ();
2160 print_version (stderr
, "", true);
2163 print_plugins_help (stderr
, "");
2165 /* Exit early if we can (e.g. -help). */
2166 if (!exit_after_options
)
2173 if (warningcount
|| errorcount
|| werrorcount
)
2174 print_ignored_options ();
2176 /* Invoke registered plugin callbacks if any. Some plugins could
2177 emit some diagnostics here. */
2178 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2180 diagnostic_finish (global_dc
);
2182 finalize_plugins ();
2183 location_adhoc_data_fini (line_table
);
2184 if (seen_error () || werrorcount
)
2185 return (FATAL_EXIT_CODE
);
2187 return (SUCCESS_EXIT_CODE
);
2190 /* For those that want to, this function aims to clean up enough state that
2191 you can call toplev::main again. */
2193 toplev::finalize (void)
2195 rtl_initialized
= false;
2196 this_target_rtl
->target_specific_initialized
= false;
2198 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2199 ipa_reference_c_finalize ();
2201 cgraph_c_finalize ();
2202 cgraphunit_c_finalize ();
2203 dwarf2out_c_finalize ();
2205 ipa_cp_c_finalize ();
2206 ira_costs_c_finalize ();
2207 params_c_finalize ();
2209 finalize_options_struct (&global_options
);
2210 finalize_options_struct (&global_options_set
);
2212 XDELETEVEC (save_decoded_options
);
2214 /* Clean up the context (and pass_manager etc). */
2218 obstack_free (&opts_obstack
, NULL
);