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"
33 #include "fold-const.h"
35 #include "tree-inline.h"
36 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
40 #include "insn-attr.h"
41 #include "insn-config.h"
42 #include "insn-flags.h"
57 #include "diagnostic.h"
58 #include "tree-diagnostic.h"
59 #include "tree-pretty-print.h"
64 #include "dwarf2asm.h"
67 #include "common/common-target.h"
68 #include "langhooks.h"
69 #include "cfgloop.h" /* for init_set_costs */
70 #include "hosthooks.h"
73 #include "opts-diagnostic.h"
75 #include "value-prof.h"
76 #include "alloc-pool.h"
79 #include "internal-fn.h"
82 #include "pass_manager.h"
83 #include "auto-profile.h"
84 #include "dwarf2out.h"
85 #include "ipa-reference.h"
86 #include "symbol-summary.h"
89 #include "insn-codes.h"
91 #include "tree-chkp.h"
94 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
98 #ifdef SDB_DEBUGGING_INFO
102 #ifdef XCOFF_DEBUGGING_INFO
103 #include "xcoffout.h" /* Needed for external data
104 declarations for e.g. AIX 4.x. */
109 static void general_init (const char *, bool);
110 static void do_compile ();
111 static void process_options (void);
112 static void backend_init (void);
113 static int lang_dependent_init (const char *);
114 static void init_asm_output (const char *);
115 static void finalize (bool);
117 static void crash_signal (int) ATTRIBUTE_NORETURN
;
118 static void compile_file (void);
120 /* True if we don't need a backend (e.g. preprocessing only). */
121 static bool no_backend
;
123 /* Length of line when printing switch values. */
126 /* Decoded options, and number of such options. */
127 struct cl_decoded_option
*save_decoded_options
;
128 unsigned int save_decoded_options_count
;
130 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
131 to optimize in process_options (). */
132 #define AUTODETECT_VALUE 2
134 /* Debug hooks - dependent upon command line options. */
136 const struct gcc_debug_hooks
*debug_hooks
;
138 /* The FUNCTION_DECL for the function currently being compiled,
139 or 0 if between functions. */
140 tree current_function_decl
;
142 /* Set to the FUNC_BEGIN label of the current function, or NULL
144 const char * current_function_func_begin_label
;
146 /* A random sequence of characters, unless overridden by user. */
147 static const char *flag_random_seed
;
149 /* A local time stamp derived from the time of compilation. It will be
150 zero if the system cannot provide a time. It will be -1u, if the
151 user has specified a particular random seed. */
154 /* Random number for this compilation */
155 HOST_WIDE_INT random_seed
;
159 /* When non-NULL, indicates that whenever space is allocated on the
160 stack, the resulting stack pointer must not pass this
161 address---that is, for stacks that grow downward, the stack pointer
162 must always be greater than or equal to this address; for stacks
163 that grow upward, the stack pointer must be less than this address.
164 At present, the rtx may be either a REG or a SYMBOL_REF, although
165 the support provided depends on the backend. */
168 /* True if the user has tagged the function with the 'section'
171 bool user_defined_section_attribute
= false;
173 struct target_flag_state default_target_flag_state
;
174 #if SWITCHABLE_TARGET
175 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
177 #define this_target_flag_state (&default_target_flag_state)
180 /* The user symbol prefix after having resolved same. */
181 const char *user_label_prefix
;
183 /* Output files for assembler code (real compiler output)
184 and debugging dumps. */
188 FILE *stack_usage_file
= NULL
;
190 /* The current working directory of a translation. It's generally the
191 directory from which compilation was initiated, but a preprocessed
192 file may specify the original directory in which it was
195 static const char *src_pwd
;
197 /* Initialize src_pwd with the given string, and return true. If it
198 was already initialized, return false. As a special case, it may
199 be called with a NULL argument to test whether src_pwd has NOT been
203 set_src_pwd (const char *pwd
)
207 if (strcmp (src_pwd
, pwd
) == 0)
213 src_pwd
= xstrdup (pwd
);
217 /* Return the directory from which the translation unit was initiated,
218 in case set_src_pwd() was not called before to assign it a
234 /* Called when the start of a function definition is parsed,
235 this function prints on stderr the name of the function. */
237 announce_function (tree decl
)
241 if (rtl_dump_and_exit
)
242 fprintf (stderr
, "%s ",
243 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
245 fprintf (stderr
, " %s",
246 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
248 pp_needs_newline (global_dc
->printer
) = true;
249 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
253 /* Initialize local_tick with a random number or -1 if
254 flag_random_seed is set. */
257 init_local_tick (void)
259 if (!flag_random_seed
)
261 /* Try urandom first. Time of day is too likely to collide.
262 In case of any error we just use the local tick. */
264 int fd
= open ("/dev/urandom", O_RDONLY
);
267 if (read (fd
, &random_seed
, sizeof (random_seed
))
268 != sizeof (random_seed
))
273 /* Now get the tick anyways */
274 #ifdef HAVE_GETTIMEOFDAY
278 gettimeofday (&tv
, NULL
);
279 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
283 time_t now
= time (NULL
);
285 if (now
!= (time_t)-1)
286 local_tick
= (unsigned) now
;
294 /* Set up a default flag_random_seed and local_tick, unless the user
295 already specified one. Must be called after init_local_tick. */
298 init_random_seed (void)
301 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
304 /* Obtain the random_seed. Unless NOINIT, initialize it if
305 it's not provided in the command line. */
308 get_random_seed (bool noinit
)
310 if (!flag_random_seed
&& !noinit
)
315 /* Modify the random_seed string to VAL. Return its previous
319 set_random_seed (const char *val
)
321 const char *old
= flag_random_seed
;
322 flag_random_seed
= val
;
323 if (flag_random_seed
)
327 /* When the driver passed in a hex number don't crc it again */
328 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
329 if (!(endp
> flag_random_seed
&& *endp
== 0))
330 random_seed
= crc32_string (0, flag_random_seed
);
335 /* Handler for fatal signals, such as SIGSEGV. These are transformed
336 into ICE messages, which is much more user friendly. In case the
337 error printer crashes, reset the signal to prevent infinite recursion. */
340 crash_signal (int signo
)
342 signal (signo
, SIG_DFL
);
344 /* If we crashed while processing an ASM statement, then be a little more
345 graceful. It's most likely the user's fault. */
346 if (this_is_asm_operands
)
348 output_operand_lossage ("unrecoverable error");
349 exit (FATAL_EXIT_CODE
);
352 internal_error ("%s", strsignal (signo
));
355 /* A subroutine of wrapup_global_declarations. We've come to the end of
356 the compilation unit. All deferred variables should be undeferred,
357 and all incomplete decls should be finalized. */
360 wrapup_global_declaration_1 (tree decl
)
362 /* We're not deferring this any longer. Assignment is conditional to
363 avoid needlessly dirtying PCH pages. */
364 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
365 && DECL_DEFER_OUTPUT (decl
) != 0)
366 DECL_DEFER_OUTPUT (decl
) = 0;
368 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
369 lang_hooks
.finish_incomplete_decl (decl
);
372 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
373 needs to be output. Return true if it is output. */
376 wrapup_global_declaration_2 (tree decl
)
378 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
379 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
382 /* Don't write out static consts, unless we still need them.
384 We also keep static consts if not optimizing (for debugging),
385 unless the user specified -fno-keep-static-consts.
386 ??? They might be better written into the debug information.
387 This is possible when using DWARF.
389 A language processor that wants static constants to be always
390 written out (even if it is not used) is responsible for
391 calling rest_of_decl_compilation itself. E.g. the C front-end
392 calls rest_of_decl_compilation from finish_decl.
393 One motivation for this is that is conventional in some
394 environments to write things like:
395 static const char rcsid[] = "... version string ...";
396 intending to force the string to be in the executable.
398 A language processor that would prefer to have unneeded
399 static constants "optimized away" would just defer writing
400 them out until here. E.g. C++ does this, because static
401 constants are often defined in header files.
403 ??? A tempting alternative (for both C and C++) would be
404 to force a constant to be written if and only if it is
405 defined in a main file, as opposed to an include file. */
407 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
411 node
= varpool_node::get (decl
);
413 if (!node
&& flag_ltrans
)
415 else if (node
&& node
->definition
)
417 else if (node
&& node
->alias
)
419 else if (!symtab
->global_info_ready
421 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
423 else if (node
&& node
->analyzed
)
425 else if (DECL_COMDAT (decl
))
427 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
428 && (optimize
|| !flag_keep_static_consts
429 || DECL_ARTIFICIAL (decl
)))
434 rest_of_decl_compilation (decl
, 1, 1);
442 /* Do any final processing required for the declarations in VEC, of
443 which there are LEN. We write out inline functions and variables
444 that have been deferred until this point, but which are required.
445 Returns nonzero if anything was put out. */
448 wrapup_global_declarations (tree
*vec
, int len
)
450 bool reconsider
, output_something
= false;
453 for (i
= 0; i
< len
; i
++)
454 wrapup_global_declaration_1 (vec
[i
]);
456 /* Now emit any global variables or functions that we have been
457 putting off. We need to loop in case one of the things emitted
458 here references another one which comes earlier in the list. */
462 for (i
= 0; i
< len
; i
++)
463 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
465 output_something
= true;
469 return output_something
;
472 /* Issue appropriate warnings for the global declaration DECL. */
475 check_global_declaration (tree decl
)
477 /* Warn about any function declared static but not defined. We don't
478 warn about variables, because many programs have static variables
479 that exist only to get some text into the object file. */
480 symtab_node
*snode
= symtab_node::get (decl
);
481 if (TREE_CODE (decl
) == FUNCTION_DECL
482 && DECL_INITIAL (decl
) == 0
483 && DECL_EXTERNAL (decl
)
484 && ! DECL_ARTIFICIAL (decl
)
485 && ! TREE_NO_WARNING (decl
)
486 && ! TREE_PUBLIC (decl
)
487 && (warn_unused_function
488 || snode
->referred_to_p (/*include_self=*/false)))
490 if (snode
->referred_to_p (/*include_self=*/false))
491 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
493 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
494 /* This symbol is effectively an "extern" declaration now. */
495 TREE_PUBLIC (decl
) = 1;
498 /* Warn about static fns or vars defined but not used. */
499 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
500 /* We don't warn about "static const" variables because the
501 "rcs_id" idiom uses that construction. */
502 || (warn_unused_variable
503 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
504 && ! DECL_IN_SYSTEM_HEADER (decl
)
505 && ! snode
->referred_to_p (/*include_self=*/false)
506 /* This TREE_USED check is needed in addition to referred_to_p
507 above, because the `__unused__' attribute is not being
508 considered for referred_to_p. */
509 && ! TREE_USED (decl
)
510 /* The TREE_USED bit for file-scope decls is kept in the identifier,
511 to handle multiple external decls in different scopes. */
512 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
513 && ! DECL_EXTERNAL (decl
)
514 && ! DECL_ARTIFICIAL (decl
)
515 && ! DECL_ABSTRACT_ORIGIN (decl
)
516 && ! TREE_PUBLIC (decl
)
517 /* A volatile variable might be used in some non-obvious way. */
518 && ! TREE_THIS_VOLATILE (decl
)
519 /* Global register variables must be declared to reserve them. */
520 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
521 /* Global ctors and dtors are called by the runtime. */
522 && (TREE_CODE (decl
) != FUNCTION_DECL
523 || (!DECL_STATIC_CONSTRUCTOR (decl
)
524 && !DECL_STATIC_DESTRUCTOR (decl
)))
525 /* Otherwise, ask the language. */
526 && lang_hooks
.decls
.warn_unused_global (decl
))
527 warning_at (DECL_SOURCE_LOCATION (decl
),
528 (TREE_CODE (decl
) == FUNCTION_DECL
)
529 ? OPT_Wunused_function
530 : OPT_Wunused_variable
,
531 "%qD defined but not used", decl
);
534 /* Compile an entire translation unit. Write a file of assembly
535 output and various debugging dumps. */
540 timevar_start (TV_PHASE_PARSING
);
541 timevar_push (TV_PARSE_GLOBAL
);
543 /* Parse entire file and generate initial debug information. */
544 lang_hooks
.parse_file ();
546 timevar_pop (TV_PARSE_GLOBAL
);
547 timevar_stop (TV_PHASE_PARSING
);
549 if (flag_dump_locations
)
550 dump_location_info (stderr
);
552 /* Compilation is now finished except for writing
553 what's left of the symbol table output. */
555 if (flag_syntax_only
|| flag_wpa
)
558 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
559 and this shouldn't influence any types built by the middle-end
560 from now on (like gcov_info_type). */
561 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
563 ggc_protect_identifiers
= false;
565 /* Run the actual compilation process. */
568 timevar_start (TV_PHASE_OPT_GEN
);
569 symtab
->finalize_compilation_unit ();
570 timevar_stop (TV_PHASE_OPT_GEN
);
573 /* Perform any post compilation-proper parser cleanups and
574 processing. This is currently only needed for the C++ parser,
575 which can be hopefully cleaned up so this hook is no longer
577 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
578 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
583 timevar_start (TV_PHASE_LATE_ASM
);
585 /* Compilation unit is finalized. When producing non-fat LTO object, we are
586 basically finished. */
587 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
589 /* File-scope initialization for AddressSanitizer. */
590 if (flag_sanitize
& SANITIZE_ADDRESS
)
593 if (flag_sanitize
& SANITIZE_THREAD
)
596 if (flag_check_pointer_bounds
)
601 output_shared_constant_pool ();
602 output_object_blocks ();
603 finish_tm_clone_pairs ();
605 /* Write out any pending weak symbol declarations. */
608 /* This must be at the end before unwind and debug info.
609 Some target ports emit PIC setup thunks here. */
610 targetm
.asm_out
.code_end ();
612 /* Do dbx symbols. */
613 timevar_push (TV_SYMOUT
);
615 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
616 if (dwarf2out_do_frame ())
617 dwarf2out_frame_finish ();
620 (*debug_hooks
->finish
) (main_input_filename
);
621 timevar_pop (TV_SYMOUT
);
623 /* Output some stuff at end of file if nec. */
625 dw2_output_indirect_constants ();
627 /* Flush any pending external directives. */
628 process_pending_assemble_externals ();
631 /* Emit LTO marker if LTO info has been previously emitted. This is
632 used by collect2 to determine whether an object file contains IL.
633 We used to emit an undefined reference here, but this produces
634 link errors if an object file with IL is stored into a shared
635 library without invoking lto1. */
636 if (flag_generate_lto
|| flag_generate_offload
)
638 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
639 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
641 (unsigned HOST_WIDE_INT
) 1, 8);
642 #elif defined ASM_OUTPUT_ALIGNED_COMMON
643 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
644 (unsigned HOST_WIDE_INT
) 1, 8);
646 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
647 (unsigned HOST_WIDE_INT
) 1,
648 (unsigned HOST_WIDE_INT
) 1);
652 /* Let linker plugin know that this is a slim object and must be LTOed
653 even when user did not ask for it. */
654 if (flag_generate_lto
&& !flag_fat_lto_objects
)
656 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
657 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
658 (unsigned HOST_WIDE_INT
) 1, 8);
659 #elif defined ASM_OUTPUT_ALIGNED_COMMON
660 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
661 (unsigned HOST_WIDE_INT
) 1, 8);
663 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
664 (unsigned HOST_WIDE_INT
) 1,
665 (unsigned HOST_WIDE_INT
) 1);
669 /* Attach a special .ident directive to the end of the file to identify
670 the version of GCC which compiled this code. The format of the .ident
671 string is patterned after the ones produced by native SVR4 compilers. */
674 const char *pkg_version
= "(GNU) ";
677 if (strcmp ("(GCC) ", pkgversion_string
))
678 pkg_version
= pkgversion_string
;
680 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
681 targetm
.asm_out
.output_ident (ident_str
);
684 /* Auto profile finalization. */
685 if (flag_auto_profile
)
688 /* Invoke registered plugin callbacks. */
689 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
691 /* This must be at the end. Some target ports emit end of file directives
692 into the assembly file here, and hence we can not output anything to the
693 assembly file after this point. */
694 targetm
.asm_out
.file_end ();
696 timevar_stop (TV_PHASE_LATE_ASM
);
699 /* Print version information to FILE.
700 Each line begins with INDENT (for the case where FILE is the
701 assembler output file).
703 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
704 proper and can print pertinent state (e.g. params and plugins).
706 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
707 compiler, and we don't hold the mutex on the compiler's global state:
708 we can't print params and plugins, since they might not be initialized,
709 or might be being manipulated by a compile running in another
713 print_version (FILE *file
, const char *indent
, bool show_global_state
)
715 static const char fmt1
[] =
717 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
719 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
722 static const char fmt2
[] =
723 N_("GMP version %s, MPFR version %s, MPC version %s\n");
724 static const char fmt3
[] =
725 N_("%s%swarning: %s header version %s differs from library version %s.\n");
726 static const char fmt4
[] =
727 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
729 #define __VERSION__ "[?]"
732 file
== stderr
? _(fmt1
) : fmt1
,
733 indent
, *indent
!= 0 ? " " : "",
734 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
735 indent
, __VERSION__
);
737 /* We need to stringify the GMP macro values. Ugh, gmp_version has
738 two string formats, "i.j.k" and "i.j" when k is zero. As of
739 gmp-4.3.0, GMP always uses the 3 number format. */
740 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
741 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
742 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
743 #define GCC_GMP_VERSION \
744 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
745 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
746 #define GCC_GMP_STRINGIFY_VERSION \
747 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
748 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
750 #define GCC_GMP_STRINGIFY_VERSION \
751 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
752 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
753 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
756 file
== stderr
? _(fmt2
) : fmt2
,
757 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
758 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
760 file
== stderr
? _(fmt3
) : fmt3
,
761 indent
, *indent
!= 0 ? " " : "",
762 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
763 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
765 file
== stderr
? _(fmt3
) : fmt3
,
766 indent
, *indent
!= 0 ? " " : "",
767 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
768 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
770 file
== stderr
? _(fmt3
) : fmt3
,
771 indent
, *indent
!= 0 ? " " : "",
772 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
774 if (show_global_state
)
777 file
== stderr
? _(fmt4
) : fmt4
,
778 indent
, *indent
!= 0 ? " " : "",
779 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
781 print_plugins_versions (file
, indent
);
786 print_to_asm_out_file (print_switch_type type
, const char * text
)
788 bool prepend_sep
= true;
792 case SWITCH_TYPE_LINE_END
:
793 putc ('\n', asm_out_file
);
796 case SWITCH_TYPE_LINE_START
:
797 fputs (ASM_COMMENT_START
, asm_out_file
);
798 return strlen (ASM_COMMENT_START
);
800 case SWITCH_TYPE_DESCRIPTIVE
:
801 if (ASM_COMMENT_START
[0] == 0)
804 case SWITCH_TYPE_PASSED
:
805 case SWITCH_TYPE_ENABLED
:
807 fputc (' ', asm_out_file
);
808 fputs (text
, asm_out_file
);
809 /* No need to return the length here as
810 print_single_switch has already done it. */
819 print_to_stderr (print_switch_type type
, const char * text
)
823 case SWITCH_TYPE_LINE_END
:
827 case SWITCH_TYPE_LINE_START
:
830 case SWITCH_TYPE_PASSED
:
831 case SWITCH_TYPE_ENABLED
:
835 case SWITCH_TYPE_DESCRIPTIVE
:
836 fputs (text
, stderr
);
837 /* No need to return the length here as
838 print_single_switch has already done it. */
846 /* Print an option value and return the adjusted position in the line.
847 ??? print_fn doesn't handle errors, eg disk full; presumably other
848 code will catch a disk full though. */
851 print_single_switch (print_switch_fn_type print_fn
,
853 print_switch_type type
,
856 /* The ultrix fprintf returns 0 on success, so compute the result
857 we want here since we need it for the following test. The +1
858 is for the separator character that will probably be emitted. */
859 int len
= strlen (text
) + 1;
862 && pos
+ len
> MAX_LINE
)
864 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
869 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
871 print_fn (type
, text
);
875 /* Print active target switches using PRINT_FN.
876 POS is the current cursor position and MAX is the size of a "line".
877 Each line begins with INDENT and ends with TERM.
878 Each switch is separated from the next by SEP. */
881 print_switch_values (print_switch_fn_type print_fn
)
886 /* Fill in the -frandom-seed option, if the user didn't pass it, so
887 that it can be printed below. This helps reproducibility. */
888 if (!flag_random_seed
)
891 /* Print the options as passed. */
892 pos
= print_single_switch (print_fn
, pos
,
893 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
895 for (j
= 1; j
< save_decoded_options_count
; j
++)
897 switch (save_decoded_options
[j
].opt_index
)
910 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
911 save_decoded_options
[j
].orig_option_with_args_text
);
915 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
917 /* Print the -f and -m options that have been enabled.
918 We don't handle language specific options but printing argv
920 pos
= print_single_switch (print_fn
, 0,
921 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
923 for (j
= 0; j
< cl_options_count
; j
++)
924 if (cl_options
[j
].cl_report
925 && option_enabled (j
, &global_options
) > 0)
926 pos
= print_single_switch (print_fn
, pos
,
927 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
929 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
932 /* Open assembly code output file. Do this even if -fsyntax-only is
933 on, because then the driver will have provided the name of a
934 temporary file or bit bucket for us. NAME is the file specified on
935 the command line, possibly NULL. */
937 init_asm_output (const char *name
)
939 if (name
== NULL
&& asm_file_name
== 0)
940 asm_out_file
= stdout
;
943 if (asm_file_name
== 0)
945 int len
= strlen (dump_base_name
);
946 char *dumpname
= XNEWVEC (char, len
+ 6);
948 memcpy (dumpname
, dump_base_name
, len
+ 1);
949 strip_off_ending (dumpname
, len
);
950 strcat (dumpname
, ".s");
951 asm_file_name
= dumpname
;
953 if (!strcmp (asm_file_name
, "-"))
954 asm_out_file
= stdout
;
955 else if (!canonical_filename_eq (asm_file_name
, name
)
956 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
957 asm_out_file
= fopen (asm_file_name
, "w");
959 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
960 line in the current file. */
961 fatal_error (UNKNOWN_LOCATION
,
962 "input file %qs is the same as output file",
964 if (asm_out_file
== 0)
965 fatal_error (UNKNOWN_LOCATION
,
966 "can%'t open %qs for writing: %m", asm_file_name
);
969 if (!flag_syntax_only
)
971 targetm
.asm_out
.file_start ();
973 if (flag_record_gcc_switches
)
975 if (targetm
.asm_out
.record_gcc_switches
)
977 /* Let the target know that we are about to start recording. */
978 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
980 /* Now record the switches. */
981 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
982 /* Let the target know that the recording is over. */
983 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
987 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
990 if (flag_verbose_asm
)
992 /* Print the list of switches in effect
993 into the assembler file as comments. */
994 print_version (asm_out_file
, ASM_COMMENT_START
, true);
995 print_switch_values (print_to_asm_out_file
);
996 putc ('\n', asm_out_file
);
1001 /* A helper function; used as the reallocator function for cpp's line
1004 realloc_for_line_map (void *ptr
, size_t len
)
1006 return ggc_realloc (ptr
, len
);
1009 /* A helper function: used as the allocator function for
1010 identifier_to_locale. */
1012 alloc_for_identifier_to_locale (size_t len
)
1014 return ggc_alloc_atomic (len
);
1017 /* Output stack usage information. */
1019 output_stack_usage (void)
1021 static bool warning_issued
= false;
1022 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
1023 const char *stack_usage_kind_str
[] = {
1028 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
1029 enum stack_usage_kind_type stack_usage_kind
;
1031 if (stack_usage
< 0)
1033 if (!warning_issued
)
1035 warning (0, "stack usage computation not supported for this target");
1036 warning_issued
= true;
1041 stack_usage_kind
= STATIC
;
1043 /* Add the maximum amount of space pushed onto the stack. */
1044 if (current_function_pushed_stack_size
> 0)
1046 stack_usage
+= current_function_pushed_stack_size
;
1047 stack_usage_kind
= DYNAMIC_BOUNDED
;
1050 /* Now on to the tricky part: dynamic stack allocation. */
1051 if (current_function_allocates_dynamic_stack_space
)
1053 if (current_function_has_unbounded_dynamic_stack_size
)
1054 stack_usage_kind
= DYNAMIC
;
1056 stack_usage_kind
= DYNAMIC_BOUNDED
;
1058 /* Add the size even in the unbounded case, this can't hurt. */
1059 stack_usage
+= current_function_dynamic_stack_size
;
1062 if (flag_stack_usage
)
1064 expanded_location loc
1065 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1066 /* We don't want to print the full qualified name because it can be long,
1067 so we strip the scope prefix, but we may need to deal with the suffix
1068 created by the compiler. */
1070 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1072 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1075 const char *dot
= strchr (name
, '.');
1076 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1079 dot
= strchr (name
, '.');
1084 const char *dot
= strrchr (name
, '.');
1089 fprintf (stack_usage_file
,
1090 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1091 lbasename (loc
.file
),
1096 stack_usage_kind_str
[stack_usage_kind
]);
1099 if (warn_stack_usage
>= 0)
1101 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1103 if (stack_usage_kind
== DYNAMIC
)
1104 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1105 else if (stack_usage
> warn_stack_usage
)
1107 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1109 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1112 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1118 /* Open an auxiliary output file. */
1120 open_auxiliary_file (const char *ext
)
1125 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1126 file
= fopen (filename
, "w");
1128 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1133 /* Initialization of the front end environment, before command line
1134 options are parsed. Signal handlers, internationalization etc.
1135 ARGV0 is main's argv[0]. */
1137 general_init (const char *argv0
, bool init_signals
)
1141 p
= argv0
+ strlen (argv0
);
1142 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1146 xmalloc_set_program_name (progname
);
1150 /* Unlock the stdio streams. */
1151 unlock_std_streams ();
1153 gcc_init_libintl ();
1155 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1156 identifier_to_locale_free
= ggc_free
;
1158 /* Initialize the diagnostics reporting machinery, so option parsing
1159 can give warnings and errors. */
1160 diagnostic_initialize (global_dc
, N_OPTS
);
1161 /* Set a default printer. Language specific initializations will
1162 override it later. */
1163 tree_diagnostics_defaults (global_dc
);
1165 global_dc
->show_caret
1166 = global_options_init
.x_flag_diagnostics_show_caret
;
1167 global_dc
->show_option_requested
1168 = global_options_init
.x_flag_diagnostics_show_option
;
1169 global_dc
->show_column
1170 = global_options_init
.x_flag_show_column
;
1171 global_dc
->internal_error
= plugins_internal_error_function
;
1172 global_dc
->option_enabled
= option_enabled
;
1173 global_dc
->option_state
= &global_options
;
1174 global_dc
->option_name
= option_name
;
1178 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1180 signal (SIGSEGV
, crash_signal
);
1183 signal (SIGILL
, crash_signal
);
1186 signal (SIGBUS
, crash_signal
);
1189 signal (SIGABRT
, crash_signal
);
1191 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1192 signal (SIGIOT
, crash_signal
);
1195 signal (SIGFPE
, crash_signal
);
1198 /* Other host-specific signal setup. */
1199 (*host_hooks
.extra_signals
)();
1202 /* Initialize the garbage-collector, string pools and tree type hash
1206 input_location
= UNKNOWN_LOCATION
;
1207 line_table
= ggc_alloc
<line_maps
> ();
1208 linemap_init (line_table
, BUILTINS_LOCATION
);
1209 line_table
->reallocator
= realloc_for_line_map
;
1210 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1213 /* Initialize register usage now so switches may override. */
1216 /* Register the language-independent parameters. */
1217 global_init_params ();
1219 /* This must be done after global_init_params but before argument
1221 init_ggc_heuristics ();
1223 /* Create the singleton holder for global state.
1224 Doing so also creates the pass manager and with it the passes. */
1225 g
= new gcc::context ();
1226 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1228 statistics_early_init ();
1232 /* Return true if the current target supports -fsection-anchors. */
1235 target_supports_section_anchors_p (void)
1237 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1240 if (targetm
.asm_out
.output_anchor
== NULL
)
1246 /* Default the align_* variables to 1 if they're still unset, and
1247 set up the align_*_log variables. */
1249 init_alignments (void)
1251 if (align_loops
<= 0)
1253 if (align_loops_max_skip
> align_loops
)
1254 align_loops_max_skip
= align_loops
- 1;
1255 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1256 if (align_jumps
<= 0)
1258 if (align_jumps_max_skip
> align_jumps
)
1259 align_jumps_max_skip
= align_jumps
- 1;
1260 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1261 if (align_labels
<= 0)
1263 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1264 if (align_labels_max_skip
> align_labels
)
1265 align_labels_max_skip
= align_labels
- 1;
1266 if (align_functions
<= 0)
1267 align_functions
= 1;
1268 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1271 /* Process the options that have been parsed. */
1273 process_options (void)
1275 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1276 This can happen with incorrect pre-processed input. */
1277 debug_hooks
= &do_nothing_debug_hooks
;
1279 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1281 /* Allow the front end to perform consistency checks and do further
1282 initialization based on the command line options. This hook also
1283 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1284 so we can correctly initialize debug output. */
1285 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1287 /* Some machines may reject certain combinations of options. */
1288 targetm
.target_option
.override ();
1290 /* Avoid any informative notes in the second run of -fcompare-debug. */
1291 if (flag_compare_debug
)
1292 diagnostic_inhibit_notes (global_dc
);
1294 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1296 warning (OPT_fsection_anchors
,
1297 "this target does not support %qs", "-fsection-anchors");
1298 flag_section_anchors
= 0;
1301 if (flag_short_enums
== 2)
1302 flag_short_enums
= targetm
.default_short_enums ();
1304 /* Set aux_base_name if not already set. */
1307 else if (main_input_filename
)
1309 char *name
= xstrdup (lbasename (main_input_filename
));
1311 strip_off_ending (name
, strlen (name
));
1312 aux_base_name
= name
;
1315 aux_base_name
= "gccaux";
1319 || flag_loop_optimize_isl
1320 || flag_graphite_identity
1321 || flag_loop_parallelize_all
)
1322 sorry ("Graphite loop optimizations cannot be used (ISL is not available)"
1323 "(-fgraphite, -fgraphite-identity, -floop-block, "
1324 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1325 "-floop-unroll-and-jam, and -ftree-loop-linear)");
1328 if (flag_check_pointer_bounds
)
1330 if (targetm
.chkp_bound_mode () == VOIDmode
)
1332 error ("-fcheck-pointer-bounds is not supported for this target");
1333 flag_check_pointer_bounds
= 0;
1336 if (flag_sanitize
& SANITIZE_ADDRESS
)
1338 error ("-fcheck-pointer-bounds is not supported with "
1339 "Address Sanitizer");
1340 flag_check_pointer_bounds
= 0;
1344 /* One region RA really helps to decrease the code size. */
1345 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1347 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1349 if (!abi_version_at_least (2))
1351 /* -fabi-version=1 support was removed after GCC 4.9. */
1352 error ("%<-fabi-version=1%> is no longer supported");
1353 flag_abi_version
= 2;
1356 /* Unrolling all loops implies that standard loop unrolling must also
1358 if (flag_unroll_all_loops
)
1359 flag_unroll_loops
= 1;
1361 /* web and rename-registers help when run after loop unrolling. */
1362 if (flag_web
== AUTODETECT_VALUE
)
1363 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1365 if (flag_rename_registers
== AUTODETECT_VALUE
)
1366 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1368 if (flag_non_call_exceptions
)
1369 flag_asynchronous_unwind_tables
= 1;
1370 if (flag_asynchronous_unwind_tables
)
1371 flag_unwind_tables
= 1;
1373 if (flag_value_profile_transformations
)
1374 flag_profile_values
= 1;
1376 /* Warn about options that are not supported on this machine. */
1377 #ifndef INSN_SCHEDULING
1378 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1379 warning (0, "instruction scheduling not supported on this target machine");
1382 if (flag_delayed_branch
)
1383 warning (0, "this target machine does not have delayed branches");
1386 user_label_prefix
= USER_LABEL_PREFIX
;
1387 if (flag_leading_underscore
!= -1)
1389 /* If the default prefix is more complicated than "" or "_",
1390 issue a warning and ignore this option. */
1391 if (user_label_prefix
[0] == 0 ||
1392 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1394 user_label_prefix
= flag_leading_underscore
? "_" : "";
1397 warning (0, "-f%sleading-underscore not supported on this target machine",
1398 flag_leading_underscore
? "" : "no-");
1401 /* If we are in verbose mode, write out the version and maybe all the
1402 option flags in use. */
1405 print_version (stderr
, "", true);
1407 print_switch_values (print_to_stderr
);
1410 if (flag_syntax_only
)
1412 write_symbols
= NO_DEBUG
;
1418 if (debug_info_level
== DINFO_LEVEL_NONE
)
1420 debug_info_level
= DINFO_LEVEL_NORMAL
;
1422 if (write_symbols
== NO_DEBUG
)
1423 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1426 debug_info_level
= DINFO_LEVEL_NONE
;
1429 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1431 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1434 error ("could not open final insn dump file %qs: %m",
1435 flag_dump_final_insns
);
1436 flag_dump_final_insns
= NULL
;
1438 else if (fclose (final_output
))
1440 error ("could not close zeroed insn dump file %qs: %m",
1441 flag_dump_final_insns
);
1442 flag_dump_final_insns
= NULL
;
1446 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1448 if (debug_info_level
== DINFO_LEVEL_NONE
)
1449 write_symbols
= NO_DEBUG
;
1451 if (write_symbols
== NO_DEBUG
)
1453 #if defined(DBX_DEBUGGING_INFO)
1454 else if (write_symbols
== DBX_DEBUG
)
1455 debug_hooks
= &dbx_debug_hooks
;
1457 #if defined(XCOFF_DEBUGGING_INFO)
1458 else if (write_symbols
== XCOFF_DEBUG
)
1459 debug_hooks
= &xcoff_debug_hooks
;
1461 #ifdef SDB_DEBUGGING_INFO
1462 else if (write_symbols
== SDB_DEBUG
)
1463 debug_hooks
= &sdb_debug_hooks
;
1465 #ifdef DWARF2_DEBUGGING_INFO
1466 else if (write_symbols
== DWARF2_DEBUG
)
1467 debug_hooks
= &dwarf2_debug_hooks
;
1469 #ifdef VMS_DEBUGGING_INFO
1470 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1471 debug_hooks
= &vmsdbg_debug_hooks
;
1473 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1474 else if (write_symbols
== DWARF2_DEBUG
)
1475 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1478 error ("target system does not support the %qs debug format",
1479 debug_type_names
[write_symbols
]);
1481 /* We know which debug output will be used so we can set flag_var_tracking
1482 and flag_var_tracking_uninit if the user has not specified them. */
1483 if (debug_info_level
< DINFO_LEVEL_NORMAL
1484 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1486 if (flag_var_tracking
== 1
1487 || flag_var_tracking_uninit
== 1)
1489 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1490 warning (0, "variable tracking requested, but useless unless "
1491 "producing debug info");
1493 warning (0, "variable tracking requested, but not supported "
1494 "by this debug format");
1496 flag_var_tracking
= 0;
1497 flag_var_tracking_uninit
= 0;
1500 /* The debug hooks are used to implement -fdump-go-spec because it
1501 gives a simple and stable API for all the information we need to
1503 if (flag_dump_go_spec
!= NULL
)
1504 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1506 /* If the user specifically requested variable tracking with tagging
1507 uninitialized variables, we need to turn on variable tracking.
1508 (We already determined above that variable tracking is feasible.) */
1509 if (flag_var_tracking_uninit
== 1)
1510 flag_var_tracking
= 1;
1512 if (flag_var_tracking
== AUTODETECT_VALUE
)
1513 flag_var_tracking
= optimize
>= 1;
1515 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1516 flag_var_tracking_uninit
= flag_var_tracking
;
1518 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1519 flag_var_tracking_assignments
= flag_var_tracking
1520 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1522 if (flag_var_tracking_assignments_toggle
)
1523 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1525 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1526 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1528 if (flag_var_tracking_assignments
1529 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1530 warning (0, "var-tracking-assignments changes selective scheduling");
1532 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1534 if (HAVE_conditional_move
)
1535 flag_tree_cselim
= 1;
1537 flag_tree_cselim
= 0;
1540 /* If auxiliary info generation is desired, open the output file.
1541 This goes in the same directory as the source file--unlike
1542 all the other output files. */
1543 if (flag_gen_aux_info
)
1545 aux_info_file
= fopen (aux_info_file_name
, "w");
1546 if (aux_info_file
== 0)
1547 fatal_error (input_location
, "can%'t open %s: %m", aux_info_file_name
);
1550 if (!targetm_common
.have_named_sections
)
1552 if (flag_function_sections
)
1554 warning (0, "-ffunction-sections not supported for this target");
1555 flag_function_sections
= 0;
1557 if (flag_data_sections
)
1559 warning (0, "-fdata-sections not supported for this target");
1560 flag_data_sections
= 0;
1564 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1566 warning (0, "-fprefetch-loop-arrays not supported for this target");
1567 flag_prefetch_loop_arrays
= 0;
1569 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1571 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1572 flag_prefetch_loop_arrays
= 0;
1575 /* This combination of options isn't handled for i386 targets and doesn't
1576 make much sense anyway, so don't allow it. */
1577 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1579 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1580 flag_prefetch_loop_arrays
= 0;
1583 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1584 if (flag_signaling_nans
)
1585 flag_trapping_math
= 1;
1587 /* We cannot reassociate if we want traps or signed zeros. */
1588 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1590 warning (0, "-fassociative-math disabled; other options take precedence");
1591 flag_associative_math
= 0;
1594 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1595 if (flag_cx_limited_range
)
1596 flag_complex_method
= 0;
1598 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1599 if (flag_cx_fortran_rules
)
1600 flag_complex_method
= 1;
1602 /* Targets must be able to place spill slots at lower addresses. If the
1603 target already uses a soft frame pointer, the transition is trivial. */
1604 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1606 warning (0, "-fstack-protector not supported for this target");
1607 flag_stack_protect
= 0;
1609 if (!flag_stack_protect
)
1610 warn_stack_protect
= 0;
1612 /* Address Sanitizer needs porting to each target architecture. */
1614 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1615 && !FRAME_GROWS_DOWNWARD
)
1618 "-fsanitize=address and -fsanitize=kernel-address "
1619 "are not supported for this target");
1620 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1623 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1624 && targetm
.asan_shadow_offset
== NULL
)
1626 warning (0, "-fsanitize=address not supported for this target");
1627 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1630 /* Do not use IPA optimizations for register allocation if profiler is active
1631 or port does not emit prologue and epilogue as RTL. */
1632 if (profile_flag
|| !targetm
.have_prologue () || !targetm
.have_epilogue ())
1635 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1636 have not been set. */
1637 if (!global_options_set
.x_warnings_are_errors
1638 && warn_coverage_mismatch
1639 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1641 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1642 DK_ERROR
, UNKNOWN_LOCATION
);
1644 /* Save the current optimization options. */
1645 optimization_default_node
= build_optimization_node (&global_options
);
1646 optimization_current_node
= optimization_default_node
;
1648 /* Please don't change global_options after this point, those changes won't
1649 be reflected in optimization_{default,current}_node. */
1652 /* This function can be called multiple times to reinitialize the compiler
1653 back end when register classes or instruction sets have changed,
1654 before each function. */
1656 backend_init_target (void)
1658 /* Initialize alignment variables. */
1661 /* This depends on stack_pointer_rtx. */
1662 init_fake_stack_mems ();
1664 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1666 init_alias_target ();
1668 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1671 /* Depends on the enabled attribute. */
1674 /* The following initialization functions need to generate rtl, so
1675 provide a dummy function context for them. */
1676 init_dummy_function_start ();
1678 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1679 on a mode change. */
1681 init_lower_subreg ();
1684 init_expr_target ();
1687 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1688 after a mode change as well. */
1689 caller_save_initialized_p
= false;
1691 expand_dummy_function_end ();
1694 /* Initialize the compiler back end. This function is called only once,
1695 when starting the compiler. */
1702 init_inline_once ();
1703 init_varasm_once ();
1704 save_register_info ();
1706 /* Middle end needs this initialization for default mem attributes
1707 used by early calls to make_decl_rtl. */
1710 /* Middle end needs this initialization for mode tables used to assign
1711 modes to vector variables. */
1715 /* Initialize excess precision settings. */
1717 init_excess_precision (void)
1719 /* Adjust excess precision handling based on the target options. If
1720 the front end cannot handle it, flag_excess_precision_cmdline
1721 will already have been set accordingly in the post_options
1723 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1724 flag_excess_precision
= flag_excess_precision_cmdline
;
1725 if (flag_unsafe_math_optimizations
)
1726 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1727 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1729 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1730 switch (flt_eval_method
)
1734 /* Either the target acts unpredictably (-1) or has all the
1735 operations required not to have excess precision (0). */
1736 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1740 /* In these cases, predictable excess precision makes
1744 /* Any other implementation-defined FLT_EVAL_METHOD values
1745 require the compiler to handle the associated excess
1746 precision rules in excess_precision_type. */
1752 /* Initialize things that are both lang-dependent and target-dependent.
1753 This function can be called more than once if target parameters change. */
1755 lang_dependent_init_target (void)
1757 /* This determines excess precision settings. */
1758 init_excess_precision ();
1760 /* This creates various _DECL nodes, so needs to be called after the
1761 front end is initialized. It also depends on the HAVE_xxx macros
1762 generated from the target machine description. */
1765 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1768 /* Perform initializations that are lang-dependent or target-dependent.
1769 but matters only for late optimizations and RTL generation. */
1771 static int rtl_initialized
;
1774 initialize_rtl (void)
1776 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1778 /* Initialization done just once per compilation, but delayed
1779 till code generation. */
1780 if (!rtl_initialized
)
1782 rtl_initialized
= true;
1784 /* Target specific RTL backend initialization. */
1785 if (!this_target_rtl
->target_specific_initialized
)
1787 backend_init_target ();
1788 this_target_rtl
->target_specific_initialized
= true;
1792 /* Language-dependent initialization. Returns nonzero on success. */
1794 lang_dependent_init (const char *name
)
1796 location_t save_loc
= input_location
;
1797 if (dump_base_name
== 0)
1798 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1800 /* Other front-end initialization. */
1801 input_location
= BUILTINS_LOCATION
;
1802 if (lang_hooks
.init () == 0)
1804 input_location
= save_loc
;
1808 init_asm_output (name
);
1810 /* If stack usage information is desired, open the output file. */
1811 if (flag_stack_usage
)
1812 stack_usage_file
= open_auxiliary_file ("su");
1815 /* This creates various _DECL nodes, so needs to be called after the
1816 front end is initialized. */
1819 /* Do the target-specific parts of the initialization. */
1820 lang_dependent_init_target ();
1824 /* If dbx symbol table desired, initialize writing it and output the
1825 predefined types. */
1826 timevar_push (TV_SYMOUT
);
1828 /* Now we have the correct original filename, we can initialize
1830 (*debug_hooks
->init
) (name
);
1832 timevar_pop (TV_SYMOUT
);
1839 /* Reinitialize everything when target parameters, such as register usage,
1842 target_reinit (void)
1844 struct rtl_data saved_x_rtl
;
1845 rtx
*saved_regno_reg_rtx
;
1846 tree saved_optimization_current_node
;
1847 struct target_optabs
*saved_this_fn_optabs
;
1849 /* Temporarily switch to the default optimization node, so that
1850 *this_target_optabs is set to the default, not reflecting
1851 whatever a previous function used for the optimize
1853 saved_optimization_current_node
= optimization_current_node
;
1854 saved_this_fn_optabs
= this_fn_optabs
;
1855 if (saved_optimization_current_node
!= optimization_default_node
)
1857 optimization_current_node
= optimization_default_node
;
1858 cl_optimization_restore
1860 TREE_OPTIMIZATION (optimization_default_node
));
1862 this_fn_optabs
= this_target_optabs
;
1864 /* Save *crtl and regno_reg_rtx around the reinitialization
1865 to allow target_reinit being called even after prepare_function_start. */
1866 saved_regno_reg_rtx
= regno_reg_rtx
;
1867 if (saved_regno_reg_rtx
)
1869 saved_x_rtl
= *crtl
;
1870 memset (crtl
, '\0', sizeof (*crtl
));
1871 regno_reg_rtx
= NULL
;
1874 this_target_rtl
->target_specific_initialized
= false;
1876 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1877 to initialize reg_raw_mode[]. */
1880 /* This invokes target hooks to set fixed_reg[] etc, which is
1884 /* Reinitialize lang-dependent parts. */
1885 lang_dependent_init_target ();
1887 /* Restore the original optimization node. */
1888 if (saved_optimization_current_node
!= optimization_default_node
)
1890 optimization_current_node
= saved_optimization_current_node
;
1891 cl_optimization_restore (&global_options
,
1892 TREE_OPTIMIZATION (optimization_current_node
));
1894 this_fn_optabs
= saved_this_fn_optabs
;
1896 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1897 expand_dummy_function_end clears it. */
1898 if (saved_regno_reg_rtx
)
1900 *crtl
= saved_x_rtl
;
1901 regno_reg_rtx
= saved_regno_reg_rtx
;
1902 saved_regno_reg_rtx
= NULL
;
1907 dump_memory_report (bool final
)
1909 dump_line_table_statistics ();
1910 ggc_print_statistics ();
1911 stringpool_statistics ();
1912 dump_tree_statistics ();
1913 dump_gimple_statistics ();
1914 dump_rtx_statistics ();
1915 dump_alloc_pool_statistics ();
1916 dump_bitmap_statistics ();
1917 dump_hash_table_loc_statistics ();
1918 dump_vec_loc_statistics ();
1919 dump_ggc_loc_statistics (final
);
1920 dump_alias_stats (stderr
);
1921 dump_pta_stats (stderr
);
1924 /* Clean up: close opened files, etc. */
1927 finalize (bool no_backend
)
1929 /* Close the dump files. */
1930 if (flag_gen_aux_info
)
1932 fclose (aux_info_file
);
1934 unlink (aux_info_file_name
);
1937 /* Close non-debugging input and output files. Take special care to note
1938 whether fclose returns an error, since the pages might still be on the
1939 buffer chain while the file is open. */
1943 if (ferror (asm_out_file
) != 0)
1944 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
1945 if (fclose (asm_out_file
) != 0)
1946 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
1949 if (stack_usage_file
)
1950 fclose (stack_usage_file
);
1956 g
->get_passes ()->finish_optimization_passes ();
1962 dump_memory_report (true);
1965 dump_profile_report ();
1967 /* Language-specific end of compilation actions. */
1968 lang_hooks
.finish ();
1972 standard_type_bitsize (int bitsize
)
1974 /* As a special exception, we always want __int128 enabled if possible. */
1977 if (bitsize
== CHAR_TYPE_SIZE
1978 || bitsize
== SHORT_TYPE_SIZE
1979 || bitsize
== INT_TYPE_SIZE
1980 || bitsize
== LONG_TYPE_SIZE
1981 || bitsize
== LONG_LONG_TYPE_SIZE
)
1986 /* Initialize the compiler, and compile the input file. */
1992 /* Don't do any more if an error has already occurred. */
1997 timevar_start (TV_PHASE_SETUP
);
1999 /* This must be run always, because it is needed to compute the FP
2000 predefined macros, such as __LDBL_MAX__, for targets using non
2001 default FP formats. */
2002 init_adjust_machine_modes ();
2003 init_derived_machine_modes ();
2005 /* This must happen after the backend has a chance to process
2006 command line options, but before the parsers are
2008 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2009 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2010 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2011 int_n_enabled_p
[i
] = true;
2013 int_n_enabled_p
[i
] = false;
2015 /* Set up the back-end if requested. */
2019 /* Language-dependent initialization. Returns true on success. */
2020 if (lang_dependent_init (main_input_filename
))
2022 /* Initialize yet another pass. */
2024 ggc_protect_identifiers
= true;
2026 symtab
->initialize ();
2027 init_final (main_input_filename
);
2028 coverage_init (aux_base_name
);
2030 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2032 timevar_stop (TV_PHASE_SETUP
);
2038 timevar_stop (TV_PHASE_SETUP
);
2041 timevar_start (TV_PHASE_FINALIZE
);
2043 finalize (no_backend
);
2045 timevar_stop (TV_PHASE_FINALIZE
);
2049 toplev::toplev (timer
*external_timer
,
2051 : m_use_TV_TOTAL (external_timer
== NULL
),
2052 m_init_signals (init_signals
)
2055 g_timer
= external_timer
;
2060 if (g_timer
&& m_use_TV_TOTAL
)
2062 g_timer
->stop (TV_TOTAL
);
2063 g_timer
->print (stderr
);
2069 /* Potentially call timevar_init (which will create g_timevars if it
2070 doesn't already exist). */
2073 toplev::start_timevars ()
2075 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2078 timevar_start (TV_TOTAL
);
2081 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2082 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2083 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2085 It is not safe to call this function more than once. */
2088 toplev::main (int argc
, char **argv
)
2090 /* Parsing and gimplification sometimes need quite large stack.
2091 Increase stack size limits if possible. */
2092 stack_limit_increase (64 * 1024 * 1024);
2094 expandargv (&argc
, &argv
);
2096 /* Initialization of GCC's environment, and diagnostics. */
2097 general_init (argv
[0], m_init_signals
);
2099 /* One-off initialization of options that does not need to be
2100 repeated when options are added for particular functions. */
2101 init_options_once ();
2103 /* Initialize global options structures; this must be repeated for
2104 each structure used for parsing options. */
2105 init_options_struct (&global_options
, &global_options_set
);
2106 lang_hooks
.init_options_struct (&global_options
);
2108 /* Convert the options to an array. */
2109 decode_cmdline_options_to_array_default_mask (argc
,
2110 CONST_CAST2 (const char **,
2112 &save_decoded_options
,
2113 &save_decoded_options_count
);
2115 /* Perform language-specific options initialization. */
2116 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2118 /* Parse the options and do minimal processing; basically just
2119 enough to default flags appropriately. */
2120 decode_options (&global_options
, &global_options_set
,
2121 save_decoded_options
, save_decoded_options_count
,
2122 UNKNOWN_LOCATION
, global_dc
);
2124 handle_common_deferred_options ();
2128 initialize_plugins ();
2131 print_version (stderr
, "", true);
2134 print_plugins_help (stderr
, "");
2136 /* Exit early if we can (e.g. -help). */
2137 if (!exit_after_options
)
2144 if (warningcount
|| errorcount
|| werrorcount
)
2145 print_ignored_options ();
2147 /* Invoke registered plugin callbacks if any. Some plugins could
2148 emit some diagnostics here. */
2149 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2151 diagnostic_finish (global_dc
);
2153 finalize_plugins ();
2154 location_adhoc_data_fini (line_table
);
2155 if (seen_error () || werrorcount
)
2156 return (FATAL_EXIT_CODE
);
2158 return (SUCCESS_EXIT_CODE
);
2161 /* For those that want to, this function aims to clean up enough state that
2162 you can call toplev::main again. */
2164 toplev::finalize (void)
2166 rtl_initialized
= false;
2167 this_target_rtl
->target_specific_initialized
= false;
2169 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2170 ipa_reference_c_finalize ();
2172 cgraph_c_finalize ();
2173 cgraphunit_c_finalize ();
2174 dwarf2out_c_finalize ();
2176 ipa_cp_c_finalize ();
2177 ira_costs_c_finalize ();
2178 params_c_finalize ();
2180 finalize_options_struct (&global_options
);
2181 finalize_options_struct (&global_options_set
);
2183 XDELETEVEC (save_decoded_options
);
2185 /* Clean up the context (and pass_manager etc). */
2189 obstack_free (&opts_obstack
, NULL
);