1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2014 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 "tree-inline.h"
34 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
39 #include "insn-attr.h"
40 #include "insn-config.h"
41 #include "insn-flags.h"
42 #include "hard-reg-set.h"
52 #include "diagnostic.h"
53 #include "tree-diagnostic.h"
54 #include "tree-pretty-print.h"
58 #include "dwarf2asm.h"
61 #include "common/common-target.h"
62 #include "langhooks.h"
63 #include "cfgloop.h" /* for init_set_costs */
64 #include "hosthooks.h"
67 #include "opts-diagnostic.h"
69 #include "value-prof.h"
70 #include "alloc-pool.h"
73 #include "tree-ssa-alias.h"
74 #include "internal-fn.h"
75 #include "gimple-expr.h"
78 #include "diagnostic-color.h"
80 #include "pass_manager.h"
82 #include "auto-profile.h"
84 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
88 #ifdef SDB_DEBUGGING_INFO
92 #ifdef XCOFF_DEBUGGING_INFO
93 #include "xcoffout.h" /* Needed for external data
94 declarations for e.g. AIX 4.x. */
97 static void general_init (const char *);
98 static void do_compile (void);
99 static void process_options (void);
100 static void backend_init (void);
101 static int lang_dependent_init (const char *);
102 static void init_asm_output (const char *);
103 static void finalize (bool);
105 static void crash_signal (int) ATTRIBUTE_NORETURN
;
106 static void compile_file (void);
108 /* True if we don't need a backend (e.g. preprocessing only). */
109 static bool no_backend
;
111 /* Length of line when printing switch values. */
114 /* Decoded options, and number of such options. */
115 struct cl_decoded_option
*save_decoded_options
;
116 unsigned int save_decoded_options_count
;
118 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
119 to optimize in process_options (). */
120 #define AUTODETECT_VALUE 2
122 /* Debug hooks - dependent upon command line options. */
124 const struct gcc_debug_hooks
*debug_hooks
;
126 /* The FUNCTION_DECL for the function currently being compiled,
127 or 0 if between functions. */
128 tree current_function_decl
;
130 /* Set to the FUNC_BEGIN label of the current function, or NULL
132 const char * current_function_func_begin_label
;
134 /* A random sequence of characters, unless overridden by user. */
135 static const char *flag_random_seed
;
137 /* A local time stamp derived from the time of compilation. It will be
138 zero if the system cannot provide a time. It will be -1u, if the
139 user has specified a particular random seed. */
142 /* Random number for this compilation */
143 HOST_WIDE_INT random_seed
;
147 /* When non-NULL, indicates that whenever space is allocated on the
148 stack, the resulting stack pointer must not pass this
149 address---that is, for stacks that grow downward, the stack pointer
150 must always be greater than or equal to this address; for stacks
151 that grow upward, the stack pointer must be less than this address.
152 At present, the rtx may be either a REG or a SYMBOL_REF, although
153 the support provided depends on the backend. */
156 struct target_flag_state default_target_flag_state
;
157 #if SWITCHABLE_TARGET
158 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
160 #define this_target_flag_state (&default_target_flag_state)
163 /* The user symbol prefix after having resolved same. */
164 const char *user_label_prefix
;
166 /* Output files for assembler code (real compiler output)
167 and debugging dumps. */
171 FILE *stack_usage_file
= NULL
;
173 /* The current working directory of a translation. It's generally the
174 directory from which compilation was initiated, but a preprocessed
175 file may specify the original directory in which it was
178 static const char *src_pwd
;
180 /* Primary module's id (non-zero). If no module-info was read in, this will
183 unsigned primary_module_id
= 0;
185 /* Current module id. */
187 unsigned current_module_id
= 0;
189 /* Include all auxiliary modules specified in the profile. This
190 will bypass the ggc_memory limit check. */
191 bool include_all_aux
= 0;
193 /* Initialize src_pwd with the given string, and return true. If it
194 was already initialized, return false. As a special case, it may
195 be called with a NULL argument to test whether src_pwd has NOT been
199 set_src_pwd (const char *pwd
)
203 if (strcmp (src_pwd
, pwd
) == 0)
209 src_pwd
= xstrdup (pwd
);
213 /* Return the directory from which the translation unit was initiated,
214 in case set_src_pwd() was not called before to assign it a
230 /* Called when the start of a function definition is parsed,
231 this function prints on stderr the name of the function. */
233 announce_function (tree decl
)
237 if (rtl_dump_and_exit
)
238 fprintf (stderr
, "%s ",
239 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
241 fprintf (stderr
, " %s",
242 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
244 pp_needs_newline (global_dc
->printer
) = true;
245 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
249 /* Initialize local_tick with a random number or -1 if
250 flag_random_seed is set. */
253 init_local_tick (void)
255 if (!flag_random_seed
)
257 /* Try urandom first. Time of day is too likely to collide.
258 In case of any error we just use the local tick. */
260 int fd
= open ("/dev/urandom", O_RDONLY
);
263 read (fd
, &random_seed
, sizeof (random_seed
));
267 /* Now get the tick anyways */
268 #ifdef HAVE_GETTIMEOFDAY
272 gettimeofday (&tv
, NULL
);
273 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
277 time_t now
= time (NULL
);
279 if (now
!= (time_t)-1)
280 local_tick
= (unsigned) now
;
288 /* Set up a default flag_random_seed and local_tick, unless the user
289 already specified one. Must be called after init_local_tick. */
292 init_random_seed (void)
294 if (flag_random_seed
)
298 /* When the driver passed in a hex number don't crc it again */
299 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
300 if (!(endp
> flag_random_seed
&& *endp
== 0))
301 random_seed
= crc32_string (0, flag_random_seed
);
303 else if (!random_seed
)
304 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
307 /* Obtain the random_seed. Unless NOINIT, initialize it if
308 it's not provided in the command line. */
311 get_random_seed (bool noinit
)
313 if (!flag_random_seed
&& !noinit
)
318 /* Modify the random_seed string to VAL. Return its previous
322 set_random_seed (const char *val
)
324 const char *old
= flag_random_seed
;
325 flag_random_seed
= val
;
329 /* Handler for fatal signals, such as SIGSEGV. These are transformed
330 into ICE messages, which is much more user friendly. In case the
331 error printer crashes, reset the signal to prevent infinite recursion. */
334 crash_signal (int signo
)
336 signal (signo
, SIG_DFL
);
338 /* If we crashed while processing an ASM statement, then be a little more
339 graceful. It's most likely the user's fault. */
340 if (this_is_asm_operands
)
342 output_operand_lossage ("unrecoverable error");
343 exit (FATAL_EXIT_CODE
);
346 internal_error ("%s", strsignal (signo
));
349 /* A subroutine of wrapup_global_declarations. We've come to the end of
350 the compilation unit. All deferred variables should be undeferred,
351 and all incomplete decls should be finalized. */
354 wrapup_global_declaration_1 (tree decl
)
356 /* We're not deferring this any longer. Assignment is conditional to
357 avoid needlessly dirtying PCH pages. */
358 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
359 && DECL_DEFER_OUTPUT (decl
) != 0)
360 DECL_DEFER_OUTPUT (decl
) = 0;
362 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
363 lang_hooks
.finish_incomplete_decl (decl
);
366 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
367 needs to be output. Return true if it is output. */
370 wrapup_global_declaration_2 (tree decl
)
372 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
373 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
376 /* Don't write out static consts, unless we still need them.
378 We also keep static consts if not optimizing (for debugging),
379 unless the user specified -fno-keep-static-consts.
380 ??? They might be better written into the debug information.
381 This is possible when using DWARF.
383 A language processor that wants static constants to be always
384 written out (even if it is not used) is responsible for
385 calling rest_of_decl_compilation itself. E.g. the C front-end
386 calls rest_of_decl_compilation from finish_decl.
387 One motivation for this is that is conventional in some
388 environments to write things like:
389 static const char rcsid[] = "... version string ...";
390 intending to force the string to be in the executable.
392 A language processor that would prefer to have unneeded
393 static constants "optimized away" would just defer writing
394 them out until here. E.g. C++ does this, because static
395 constants are often defined in header files.
397 ??? A tempting alternative (for both C and C++) would be
398 to force a constant to be written if and only if it is
399 defined in a main file, as opposed to an include file. */
401 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
405 node
= varpool_get_node (decl
);
407 if (!node
&& flag_ltrans
)
409 else if (node
&& node
->definition
)
411 else if (node
&& node
->alias
)
413 else if (!cgraph_global_info_ready
415 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
417 else if (node
&& node
->analyzed
)
419 else if (DECL_COMDAT (decl
))
421 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
422 && (optimize
|| !flag_keep_static_consts
423 || DECL_ARTIFICIAL (decl
)))
428 rest_of_decl_compilation (decl
, 1, 1);
436 /* Do any final processing required for the declarations in VEC, of
437 which there are LEN. We write out inline functions and variables
438 that have been deferred until this point, but which are required.
439 Returns nonzero if anything was put out. */
442 wrapup_global_declarations (tree
*vec
, int len
)
444 bool reconsider
, output_something
= false;
447 for (i
= 0; i
< len
; i
++)
448 wrapup_global_declaration_1 (vec
[i
]);
450 /* Now emit any global variables or functions that we have been
451 putting off. We need to loop in case one of the things emitted
452 here references another one which comes earlier in the list. */
456 for (i
= 0; i
< len
; i
++)
457 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
459 output_something
= true;
463 return output_something
;
466 /* A subroutine of check_global_declarations. Issue appropriate warnings
467 for the global declaration DECL. */
470 check_global_declaration_1 (tree decl
)
472 /* Warn about any function declared static but not defined. We don't
473 warn about variables, because many programs have static variables
474 that exist only to get some text into the object file. */
475 if (TREE_CODE (decl
) == FUNCTION_DECL
476 && DECL_INITIAL (decl
) == 0
477 && DECL_EXTERNAL (decl
)
478 && ! DECL_ARTIFICIAL (decl
)
479 && ! TREE_NO_WARNING (decl
)
480 && ! TREE_PUBLIC (decl
)
481 && (warn_unused_function
482 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
484 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
485 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
487 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
488 /* This symbol is effectively an "extern" declaration now. */
489 TREE_PUBLIC (decl
) = 1;
492 /* Warn about static fns or vars defined but not used. */
493 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
494 /* We don't warn about "static const" variables because the
495 "rcs_id" idiom uses that construction. */
496 || (warn_unused_variable
497 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
498 && ! DECL_IN_SYSTEM_HEADER (decl
)
499 && ! TREE_USED (decl
)
500 /* The TREE_USED bit for file-scope decls is kept in the identifier,
501 to handle multiple external decls in different scopes. */
502 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
503 && ! DECL_EXTERNAL (decl
)
504 && ! TREE_PUBLIC (decl
)
505 /* A volatile variable might be used in some non-obvious way. */
506 && ! TREE_THIS_VOLATILE (decl
)
507 /* Global register variables must be declared to reserve them. */
508 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
509 /* Otherwise, ask the language. */
510 && lang_hooks
.decls
.warn_unused_global (decl
))
511 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
512 ? OPT_Wunused_function
513 : OPT_Wunused_variable
,
514 "%q+D defined but not used", decl
);
517 /* Issue appropriate warnings for the global declarations in V (of
518 which there are LEN). */
521 check_global_declarations (tree
*v
, int len
)
525 for (i
= 0; i
< len
; i
++)
526 check_global_declaration_1 (v
[i
]);
529 /* Emit debugging information for all global declarations in VEC. */
532 emit_debug_global_declarations (tree
*vec
, int len
)
536 /* Avoid confusing the debug information machinery when there are errors. */
540 timevar_push (TV_SYMOUT
);
541 for (i
= 0; i
< len
; i
++)
542 debug_hooks
->global_decl (vec
[i
]);
543 timevar_pop (TV_SYMOUT
);
546 /* Compile an entire translation unit. Write a file of assembly
547 output and various debugging dumps. */
552 timevar_start (TV_PHASE_PARSING
);
553 timevar_push (TV_PARSE_GLOBAL
);
555 /* Call the parser, which parses the entire file (calling
556 rest_of_compilation for each function). */
557 lang_hooks
.parse_file ();
559 timevar_pop (TV_PARSE_GLOBAL
);
560 timevar_stop (TV_PHASE_PARSING
);
562 /* Compilation is now finished except for writing
563 what's left of the symbol table output. */
565 if (flag_syntax_only
|| flag_wpa
)
568 ggc_protect_identifiers
= false;
570 /* This must also call finalize_compilation_unit. */
571 lang_hooks
.decls
.final_write_globals ();
579 timevar_start (TV_PHASE_LATE_ASM
);
581 /* Compilation unit is finalized. When producing non-fat LTO object, we are
582 basically finished. */
583 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
585 /* File-scope initialization for AddressSanitizer. */
586 if (flag_sanitize
& SANITIZE_ADDRESS
)
589 if (flag_sanitize
& SANITIZE_THREAD
)
592 output_shared_constant_pool ();
593 output_object_blocks ();
594 finish_tm_clone_pairs ();
596 /* Write out any pending weak symbol declarations. */
599 /* This must be at the end before unwind and debug info.
600 Some target ports emit PIC setup thunks here. */
601 targetm
.asm_out
.code_end ();
603 /* Do dbx symbols. */
604 timevar_push (TV_SYMOUT
);
606 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
607 if (dwarf2out_do_frame ())
608 dwarf2out_frame_finish ();
611 (*debug_hooks
->finish
) (main_input_filename
);
612 timevar_pop (TV_SYMOUT
);
614 /* Output some stuff at end of file if nec. */
616 dw2_output_indirect_constants ();
618 /* Flush any pending external directives. */
619 process_pending_assemble_externals ();
622 /* Emit LTO marker if LTO info has been previously emitted. This is
623 used by collect2 to determine whether an object file contains IL.
624 We used to emit an undefined reference here, but this produces
625 link errors if an object file with IL is stored into a shared
626 library without invoking lto1. */
627 if (flag_generate_lto
)
629 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
630 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
632 (unsigned HOST_WIDE_INT
) 1, 8);
633 #elif defined ASM_OUTPUT_ALIGNED_COMMON
634 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
635 (unsigned HOST_WIDE_INT
) 1, 8);
637 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
638 (unsigned HOST_WIDE_INT
) 1,
639 (unsigned HOST_WIDE_INT
) 1);
641 /* Let linker plugin know that this is a slim object and must be LTOed
642 even when user did not ask for it. */
643 if (!flag_fat_lto_objects
)
645 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
646 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
648 (unsigned HOST_WIDE_INT
) 1, 8);
649 #elif defined ASM_OUTPUT_ALIGNED_COMMON
650 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
651 (unsigned HOST_WIDE_INT
) 1, 8);
653 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
654 (unsigned HOST_WIDE_INT
) 1,
655 (unsigned HOST_WIDE_INT
) 1);
660 /* Attach a special .ident directive to the end of the file to identify
661 the version of GCC which compiled this code. The format of the .ident
662 string is patterned after the ones produced by native SVR4 compilers. */
665 const char *pkg_version
= "(GNU) ";
668 if (strcmp ("(GCC) ", pkgversion_string
))
669 pkg_version
= pkgversion_string
;
671 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
672 targetm
.asm_out
.output_ident (ident_str
);
675 /* Auto profile finalization. */
676 if (flag_auto_profile
)
679 /* Invoke registered plugin callbacks. */
680 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
682 /* This must be at the end. Some target ports emit end of file directives
683 into the assembly file here, and hence we can not output anything to the
684 assembly file after this point. */
685 targetm
.asm_out
.file_end ();
687 timevar_stop (TV_PHASE_LATE_ASM
);
690 /* Print version information to FILE.
691 Each line begins with INDENT (for the case where FILE is the
692 assembler output file). */
695 print_version (FILE *file
, const char *indent
)
697 static const char fmt1
[] =
699 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
701 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
704 static const char fmt2
[] =
705 N_("GMP version %s, MPFR version %s, MPC version %s\n");
706 static const char fmt3
[] =
707 N_("%s%swarning: %s header version %s differs from library version %s.\n");
708 static const char fmt4
[] =
709 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
711 #define __VERSION__ "[?]"
714 file
== stderr
? _(fmt1
) : fmt1
,
715 indent
, *indent
!= 0 ? " " : "",
716 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
717 indent
, __VERSION__
);
719 /* We need to stringify the GMP macro values. Ugh, gmp_version has
720 two string formats, "i.j.k" and "i.j" when k is zero. As of
721 gmp-4.3.0, GMP always uses the 3 number format. */
722 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
723 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
724 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
725 #define GCC_GMP_VERSION \
726 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
727 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
728 #define GCC_GMP_STRINGIFY_VERSION \
729 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
730 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
732 #define GCC_GMP_STRINGIFY_VERSION \
733 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
734 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
735 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
738 file
== stderr
? _(fmt2
) : fmt2
,
739 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
740 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
742 file
== stderr
? _(fmt3
) : fmt3
,
743 indent
, *indent
!= 0 ? " " : "",
744 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
745 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
747 file
== stderr
? _(fmt3
) : fmt3
,
748 indent
, *indent
!= 0 ? " " : "",
749 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
750 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
752 file
== stderr
? _(fmt3
) : fmt3
,
753 indent
, *indent
!= 0 ? " " : "",
754 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
756 file
== stderr
? _(fmt4
) : fmt4
,
757 indent
, *indent
!= 0 ? " " : "",
758 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
760 print_plugins_versions (file
, indent
);
764 print_to_asm_out_file (print_switch_type type
, const char * text
)
766 bool prepend_sep
= true;
770 case SWITCH_TYPE_LINE_END
:
771 putc ('\n', asm_out_file
);
774 case SWITCH_TYPE_LINE_START
:
775 fputs (ASM_COMMENT_START
, asm_out_file
);
776 return strlen (ASM_COMMENT_START
);
778 case SWITCH_TYPE_DESCRIPTIVE
:
779 if (ASM_COMMENT_START
[0] == 0)
782 case SWITCH_TYPE_PASSED
:
783 case SWITCH_TYPE_ENABLED
:
785 fputc (' ', asm_out_file
);
786 fputs (text
, asm_out_file
);
787 /* No need to return the length here as
788 print_single_switch has already done it. */
797 print_to_stderr (print_switch_type type
, const char * text
)
801 case SWITCH_TYPE_LINE_END
:
805 case SWITCH_TYPE_LINE_START
:
808 case SWITCH_TYPE_PASSED
:
809 case SWITCH_TYPE_ENABLED
:
813 case SWITCH_TYPE_DESCRIPTIVE
:
814 fputs (text
, stderr
);
815 /* No need to return the length here as
816 print_single_switch has already done it. */
824 /* Print an option value and return the adjusted position in the line.
825 ??? print_fn doesn't handle errors, eg disk full; presumably other
826 code will catch a disk full though. */
829 print_single_switch (print_switch_fn_type print_fn
,
831 print_switch_type type
,
834 /* The ultrix fprintf returns 0 on success, so compute the result
835 we want here since we need it for the following test. The +1
836 is for the separator character that will probably be emitted. */
837 int len
= strlen (text
) + 1;
840 && pos
+ len
> MAX_LINE
)
842 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
847 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
849 print_fn (type
, text
);
853 /* Print active target switches using PRINT_FN.
854 POS is the current cursor position and MAX is the size of a "line".
855 Each line begins with INDENT and ends with TERM.
856 Each switch is separated from the next by SEP. */
859 print_switch_values (print_switch_fn_type print_fn
)
864 /* Fill in the -frandom-seed option, if the user didn't pass it, so
865 that it can be printed below. This helps reproducibility. */
866 if (!flag_random_seed
)
869 /* Print the options as passed. */
870 pos
= print_single_switch (print_fn
, pos
,
871 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
873 for (j
= 1; j
< save_decoded_options_count
; j
++)
875 switch (save_decoded_options
[j
].opt_index
)
888 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
889 save_decoded_options
[j
].orig_option_with_args_text
);
893 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
895 /* Print the -f and -m options that have been enabled.
896 We don't handle language specific options but printing argv
898 pos
= print_single_switch (print_fn
, 0,
899 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
901 for (j
= 0; j
< cl_options_count
; j
++)
902 if (cl_options
[j
].cl_report
903 && option_enabled (j
, &global_options
) > 0)
904 pos
= print_single_switch (print_fn
, pos
,
905 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
907 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
910 /* Open assembly code output file. Do this even if -fsyntax-only is
911 on, because then the driver will have provided the name of a
912 temporary file or bit bucket for us. NAME is the file specified on
913 the command line, possibly NULL. */
915 init_asm_output (const char *name
)
917 if (name
== NULL
&& asm_file_name
== 0)
918 asm_out_file
= stdout
;
921 if (asm_file_name
== 0)
923 int len
= strlen (dump_base_name
);
924 char *dumpname
= XNEWVEC (char, len
+ 6);
926 memcpy (dumpname
, dump_base_name
, len
+ 1);
927 strip_off_ending (dumpname
, len
);
928 strcat (dumpname
, ".s");
929 asm_file_name
= dumpname
;
931 if (!strcmp (asm_file_name
, "-"))
932 asm_out_file
= stdout
;
934 asm_out_file
= fopen (asm_file_name
, "w");
935 if (asm_out_file
== 0)
936 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
939 if (!flag_syntax_only
)
941 targetm
.asm_out
.file_start ();
943 if (flag_record_gcc_switches
)
945 if (targetm
.asm_out
.record_gcc_switches
)
947 /* Let the target know that we are about to start recording. */
948 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
950 /* Now record the switches. */
951 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
952 /* Let the target know that the recording is over. */
953 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
957 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
960 if (flag_verbose_asm
)
962 /* Print the list of switches in effect
963 into the assembler file as comments. */
964 print_version (asm_out_file
, ASM_COMMENT_START
);
965 print_switch_values (print_to_asm_out_file
);
966 putc ('\n', asm_out_file
);
971 /* A helper function; used as the reallocator function for cpp's line
974 realloc_for_line_map (void *ptr
, size_t len
)
976 return GGC_RESIZEVAR (void, ptr
, len
);
979 /* A helper function: used as the allocator function for
980 identifier_to_locale. */
982 alloc_for_identifier_to_locale (size_t len
)
984 return ggc_alloc_atomic (len
);
987 /* Output stack usage information. */
989 output_stack_usage (void)
991 static bool warning_issued
= false;
992 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
993 const char *stack_usage_kind_str
[] = {
998 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
999 enum stack_usage_kind_type stack_usage_kind
;
1001 if (stack_usage
< 0)
1003 if (!warning_issued
)
1005 warning (0, "stack usage computation not supported for this target");
1006 warning_issued
= true;
1011 stack_usage_kind
= STATIC
;
1013 /* Add the maximum amount of space pushed onto the stack. */
1014 if (current_function_pushed_stack_size
> 0)
1016 stack_usage
+= current_function_pushed_stack_size
;
1017 stack_usage_kind
= DYNAMIC_BOUNDED
;
1020 /* Now on to the tricky part: dynamic stack allocation. */
1021 if (current_function_allocates_dynamic_stack_space
)
1023 if (current_function_has_unbounded_dynamic_stack_size
)
1024 stack_usage_kind
= DYNAMIC
;
1026 stack_usage_kind
= DYNAMIC_BOUNDED
;
1028 /* Add the size even in the unbounded case, this can't hurt. */
1029 stack_usage
+= current_function_dynamic_stack_size
;
1032 if (flag_stack_usage
)
1034 expanded_location loc
1035 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1036 /* We don't want to print the full qualified name because it can be long,
1037 so we strip the scope prefix, but we may need to deal with the suffix
1038 created by the compiler. */
1040 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1042 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1045 const char *dot
= strchr (name
, '.');
1046 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1049 dot
= strchr (name
, '.');
1054 const char *dot
= strrchr (name
, '.');
1059 fprintf (stack_usage_file
,
1060 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1061 lbasename (loc
.file
),
1066 stack_usage_kind_str
[stack_usage_kind
]);
1069 if (warn_stack_usage
>= 0)
1071 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1073 if (stack_usage_kind
== DYNAMIC
)
1074 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1075 else if (stack_usage
> warn_stack_usage
)
1077 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1079 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1082 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1088 /* Open an auxiliary output file. */
1090 open_auxiliary_file (const char *ext
)
1095 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1096 file
= fopen (filename
, "w");
1098 fatal_error ("can%'t open %s for writing: %m", filename
);
1103 /* Initialization of the front end environment, before command line
1104 options are parsed. Signal handlers, internationalization etc.
1105 ARGV0 is main's argv[0]. */
1107 general_init (const char *argv0
)
1111 p
= argv0
+ strlen (argv0
);
1112 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1116 xmalloc_set_program_name (progname
);
1120 /* Unlock the stdio streams. */
1121 unlock_std_streams ();
1123 gcc_init_libintl ();
1125 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1126 identifier_to_locale_free
= ggc_free
;
1128 /* Initialize the diagnostics reporting machinery, so option parsing
1129 can give warnings and errors. */
1130 diagnostic_initialize (global_dc
, N_OPTS
);
1131 /* Set a default printer. Language specific initializations will
1132 override it later. */
1133 tree_diagnostics_defaults (global_dc
);
1134 /* FIXME: This should probably be moved to C-family
1135 language-specific initializations. */
1136 /* By default print macro expansion contexts in the diagnostic
1137 finalizer -- for tokens resulting from macro expansion. */
1138 diagnostic_finalizer (global_dc
) = virt_loc_aware_diagnostic_finalizer
;
1140 global_dc
->show_caret
1141 = global_options_init
.x_flag_diagnostics_show_caret
;
1142 global_dc
->show_option_requested
1143 = global_options_init
.x_flag_diagnostics_show_option
;
1144 global_dc
->show_column
1145 = global_options_init
.x_flag_show_column
;
1146 global_dc
->internal_error
= plugins_internal_error_function
;
1147 global_dc
->option_enabled
= option_enabled
;
1148 global_dc
->option_state
= &global_options
;
1149 global_dc
->option_name
= option_name
;
1151 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1153 signal (SIGSEGV
, crash_signal
);
1156 signal (SIGILL
, crash_signal
);
1159 signal (SIGBUS
, crash_signal
);
1162 signal (SIGABRT
, crash_signal
);
1164 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1165 signal (SIGIOT
, crash_signal
);
1168 signal (SIGFPE
, crash_signal
);
1171 /* Other host-specific signal setup. */
1172 (*host_hooks
.extra_signals
)();
1174 /* Initialize the garbage-collector, string pools and tree type hash
1178 line_table
= ggc_alloc_line_maps ();
1179 linemap_init (line_table
);
1180 line_table
->reallocator
= realloc_for_line_map
;
1181 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1184 /* Initialize register usage now so switches may override. */
1187 /* Register the language-independent parameters. */
1188 global_init_params ();
1190 /* This must be done after global_init_params but before argument
1192 init_ggc_heuristics ();
1194 /* Create the singleton holder for global state.
1195 Doing so also creates the pass manager and with it the passes. */
1196 g
= new gcc::context ();
1198 statistics_early_init ();
1202 /* Return true if the current target supports -fsection-anchors. */
1205 target_supports_section_anchors_p (void)
1207 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1210 if (targetm
.asm_out
.output_anchor
== NULL
)
1216 /* Default the align_* variables to 1 if they're still unset, and
1217 set up the align_*_log variables. */
1219 init_alignments (void)
1221 if (align_loops
<= 0)
1223 if (align_loops_max_skip
> align_loops
)
1224 align_loops_max_skip
= align_loops
- 1;
1225 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1226 if (align_jumps
<= 0)
1228 if (align_jumps_max_skip
> align_jumps
)
1229 align_jumps_max_skip
= align_jumps
- 1;
1230 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1231 if (align_labels
<= 0)
1233 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1234 if (align_labels_max_skip
> align_labels
)
1235 align_labels_max_skip
= align_labels
- 1;
1236 if (align_functions
<= 0)
1237 align_functions
= 1;
1238 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1241 /* Process the options that have been parsed. */
1243 process_options (void)
1245 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1246 This can happen with incorrect pre-processed input. */
1247 debug_hooks
= &do_nothing_debug_hooks
;
1249 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1251 /* Default to -fdiagnostics-color=auto if GCC_COLORS is in the environment,
1252 otherwise default to -fdiagnostics-color=never. */
1253 if (!global_options_set
.x_flag_diagnostics_show_color
1254 && getenv ("GCC_COLORS"))
1255 pp_show_color (global_dc
->printer
)
1256 = colorize_init (DIAGNOSTICS_COLOR_AUTO
);
1258 /* Allow the front end to perform consistency checks and do further
1259 initialization based on the command line options. This hook also
1260 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1261 so we can correctly initialize debug output. */
1262 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1264 /* Some machines may reject certain combinations of options. */
1265 targetm
.target_option
.override ();
1267 /* Avoid any informative notes in the second run of -fcompare-debug. */
1268 if (flag_compare_debug
)
1269 diagnostic_inhibit_notes (global_dc
);
1271 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1273 warning (OPT_fsection_anchors
,
1274 "this target does not support %qs", "-fsection-anchors");
1275 flag_section_anchors
= 0;
1278 if (flag_short_enums
== 2)
1279 flag_short_enums
= targetm
.default_short_enums ();
1281 /* Set aux_base_name if not already set. */
1284 else if (main_input_filename
)
1286 char *name
= xstrdup (lbasename (main_input_filename
));
1288 strip_off_ending (name
, strlen (name
));
1289 aux_base_name
= name
;
1292 aux_base_name
= "gccaux";
1296 || flag_graphite_identity
1298 || flag_loop_interchange
1299 || flag_loop_strip_mine
1300 || flag_loop_parallelize_all
)
1301 sorry ("Graphite loop optimizations cannot be used (-fgraphite, "
1302 "-fgraphite-identity, -floop-block, "
1303 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1304 "and -ftree-loop-linear)");
1307 /* One region RA really helps to decrease the code size. */
1308 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1310 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1312 if (flag_strict_volatile_bitfields
> 0 && !abi_version_at_least (2))
1314 warning (0, "-fstrict-volatile-bitfields disabled; "
1315 "it is incompatible with ABI versions < 2");
1316 flag_strict_volatile_bitfields
= 0;
1319 /* Unrolling all loops implies that standard loop unrolling must also
1321 if (flag_unroll_all_loops
)
1322 flag_unroll_loops
= 1;
1324 /* web and rename-registers help when run after loop unrolling. */
1325 if (flag_web
== AUTODETECT_VALUE
)
1326 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1328 if (flag_rename_registers
== AUTODETECT_VALUE
)
1329 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1331 if (flag_non_call_exceptions
)
1332 flag_asynchronous_unwind_tables
= 1;
1333 if (flag_asynchronous_unwind_tables
)
1334 flag_unwind_tables
= 1;
1336 if (flag_value_profile_transformations
)
1337 flag_profile_values
= 1;
1339 /* Warn about options that are not supported on this machine. */
1340 #ifndef INSN_SCHEDULING
1341 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1342 warning (0, "instruction scheduling not supported on this target machine");
1345 if (flag_delayed_branch
)
1346 warning (0, "this target machine does not have delayed branches");
1349 user_label_prefix
= USER_LABEL_PREFIX
;
1350 if (flag_leading_underscore
!= -1)
1352 /* If the default prefix is more complicated than "" or "_",
1353 issue a warning and ignore this option. */
1354 if (user_label_prefix
[0] == 0 ||
1355 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1357 user_label_prefix
= flag_leading_underscore
? "_" : "";
1360 warning (0, "-f%sleading-underscore not supported on this target machine",
1361 flag_leading_underscore
? "" : "no-");
1364 /* If we are in verbose mode, write out the version and maybe all the
1365 option flags in use. */
1368 print_version (stderr
, "");
1370 print_switch_values (print_to_stderr
);
1373 if (flag_syntax_only
)
1375 write_symbols
= NO_DEBUG
;
1381 if (debug_info_level
== DINFO_LEVEL_NONE
)
1383 debug_info_level
= DINFO_LEVEL_NORMAL
;
1385 if (write_symbols
== NO_DEBUG
)
1386 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1389 debug_info_level
= DINFO_LEVEL_NONE
;
1392 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1394 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1397 error ("could not open final insn dump file %qs: %m",
1398 flag_dump_final_insns
);
1399 flag_dump_final_insns
= NULL
;
1401 else if (fclose (final_output
))
1403 error ("could not close zeroed insn dump file %qs: %m",
1404 flag_dump_final_insns
);
1405 flag_dump_final_insns
= NULL
;
1409 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1411 if (debug_info_level
== DINFO_LEVEL_NONE
)
1412 write_symbols
= NO_DEBUG
;
1414 if (write_symbols
== NO_DEBUG
)
1416 #if defined(DBX_DEBUGGING_INFO)
1417 else if (write_symbols
== DBX_DEBUG
)
1418 debug_hooks
= &dbx_debug_hooks
;
1420 #if defined(XCOFF_DEBUGGING_INFO)
1421 else if (write_symbols
== XCOFF_DEBUG
)
1422 debug_hooks
= &xcoff_debug_hooks
;
1424 #ifdef SDB_DEBUGGING_INFO
1425 else if (write_symbols
== SDB_DEBUG
)
1426 debug_hooks
= &sdb_debug_hooks
;
1428 #ifdef DWARF2_DEBUGGING_INFO
1429 else if (write_symbols
== DWARF2_DEBUG
)
1430 debug_hooks
= &dwarf2_debug_hooks
;
1432 #ifdef VMS_DEBUGGING_INFO
1433 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1434 debug_hooks
= &vmsdbg_debug_hooks
;
1437 error ("target system does not support the \"%s\" debug format",
1438 debug_type_names
[write_symbols
]);
1440 if (flag_auto_profile
&& debug_info_level
== DINFO_LEVEL_NONE
)
1441 debug_hooks
= &auto_profile_debug_hooks
;
1443 /* We know which debug output will be used so we can set flag_var_tracking
1444 and flag_var_tracking_uninit if the user has not specified them. */
1445 if (debug_info_level
< DINFO_LEVEL_NORMAL
1446 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1448 if (flag_var_tracking
== 1
1449 || flag_var_tracking_uninit
== 1)
1451 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1452 warning (0, "variable tracking requested, but useless unless "
1453 "producing debug info");
1455 warning (0, "variable tracking requested, but not supported "
1456 "by this debug format");
1458 flag_var_tracking
= 0;
1459 flag_var_tracking_uninit
= 0;
1462 /* The debug hooks are used to implement -fdump-go-spec because it
1463 gives a simple and stable API for all the information we need to
1465 if (flag_dump_go_spec
!= NULL
)
1466 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1468 /* If the user specifically requested variable tracking with tagging
1469 uninitialized variables, we need to turn on variable tracking.
1470 (We already determined above that variable tracking is feasible.) */
1471 if (flag_var_tracking_uninit
== 1)
1472 flag_var_tracking
= 1;
1474 if (flag_var_tracking
== AUTODETECT_VALUE
)
1475 flag_var_tracking
= optimize
>= 1;
1477 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1478 flag_var_tracking_uninit
= flag_var_tracking
;
1480 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1481 flag_var_tracking_assignments
= flag_var_tracking
1482 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1484 if (flag_var_tracking_assignments_toggle
)
1485 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1487 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1488 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1490 if (flag_var_tracking_assignments
1491 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1492 warning (0, "var-tracking-assignments changes selective scheduling");
1494 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1495 #ifdef HAVE_conditional_move
1496 flag_tree_cselim
= 1;
1498 flag_tree_cselim
= 0;
1501 /* If auxiliary info generation is desired, open the output file.
1502 This goes in the same directory as the source file--unlike
1503 all the other output files. */
1504 if (flag_gen_aux_info
)
1506 aux_info_file
= fopen (aux_info_file_name
, "w");
1507 if (aux_info_file
== 0)
1508 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1511 if (!targetm_common
.have_named_sections
)
1513 if (flag_function_sections
)
1515 warning (0, "-ffunction-sections not supported for this target");
1516 flag_function_sections
= 0;
1518 if (flag_data_sections
)
1520 warning (0, "-fdata-sections not supported for this target");
1521 flag_data_sections
= 0;
1525 #ifndef HAVE_prefetch
1526 if (flag_prefetch_loop_arrays
> 0)
1528 warning (0, "-fprefetch-loop-arrays not supported for this target");
1529 flag_prefetch_loop_arrays
= 0;
1532 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1534 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1535 flag_prefetch_loop_arrays
= 0;
1539 /* This combination of options isn't handled for i386 targets and doesn't
1540 make much sense anyway, so don't allow it. */
1541 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1543 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1544 flag_prefetch_loop_arrays
= 0;
1547 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1548 if (flag_signaling_nans
)
1549 flag_trapping_math
= 1;
1551 /* We cannot reassociate if we want traps or signed zeros. */
1552 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1554 warning (0, "-fassociative-math disabled; other options take precedence");
1555 flag_associative_math
= 0;
1558 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1559 if (flag_cx_limited_range
)
1560 flag_complex_method
= 0;
1562 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1563 if (flag_cx_fortran_rules
)
1564 flag_complex_method
= 1;
1566 /* Targets must be able to place spill slots at lower addresses. If the
1567 target already uses a soft frame pointer, the transition is trivial. */
1568 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1570 warning (0, "-fstack-protector not supported for this target");
1571 flag_stack_protect
= 0;
1573 if (!flag_stack_protect
)
1574 warn_stack_protect
= 0;
1576 /* Address Sanitizer needs porting to each target architecture. */
1578 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1579 && !FRAME_GROWS_DOWNWARD
)
1582 "-fsanitize=address and -fsanitize=kernel-address "
1583 "are not supported for this target");
1584 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1587 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1588 && targetm
.asan_shadow_offset
== NULL
)
1590 warning (0, "-fsanitize=address not supported for this target");
1591 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1594 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1595 have not been set. */
1596 if (!global_options_set
.x_warnings_are_errors
1597 && warn_coverage_mismatch
1598 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1600 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1601 DK_ERROR
, UNKNOWN_LOCATION
);
1603 /* Save the current optimization options. */
1604 optimization_default_node
= build_optimization_node (&global_options
);
1605 optimization_current_node
= optimization_default_node
;
1608 /* This function can be called multiple times to reinitialize the compiler
1609 back end when register classes or instruction sets have changed,
1610 before each function. */
1612 backend_init_target (void)
1614 /* Initialize alignment variables. */
1617 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1618 to initialize reg_raw_mode[]. */
1621 /* This invokes target hooks to set fixed_reg[] etc, which is
1625 /* This depends on stack_pointer_rtx. */
1626 init_fake_stack_mems ();
1628 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1630 init_alias_target ();
1632 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1635 /* The following initialization functions need to generate rtl, so
1636 provide a dummy function context for them. */
1637 init_dummy_function_start ();
1639 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1640 on a mode change. */
1642 init_lower_subreg ();
1644 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1645 after a mode change as well. */
1646 caller_save_initialized_p
= false;
1648 expand_dummy_function_end ();
1651 /* Initialize the compiler back end. This function is called only once,
1652 when starting the compiler. */
1659 init_inline_once ();
1660 init_varasm_once ();
1661 save_register_info ();
1663 /* Initialize the target-specific back end pieces. */
1665 backend_init_target ();
1668 /* Initialize excess precision settings. */
1670 init_excess_precision (void)
1672 /* Adjust excess precision handling based on the target options. If
1673 the front end cannot handle it, flag_excess_precision_cmdline
1674 will already have been set accordingly in the post_options
1676 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1677 flag_excess_precision
= flag_excess_precision_cmdline
;
1678 if (flag_unsafe_math_optimizations
)
1679 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1680 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1682 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1683 switch (flt_eval_method
)
1687 /* Either the target acts unpredictably (-1) or has all the
1688 operations required not to have excess precision (0). */
1689 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1693 /* In these cases, predictable excess precision makes
1697 /* Any other implementation-defined FLT_EVAL_METHOD values
1698 require the compiler to handle the associated excess
1699 precision rules in excess_precision_type. */
1705 /* Initialize things that are both lang-dependent and target-dependent.
1706 This function can be called more than once if target parameters change. */
1708 lang_dependent_init_target (void)
1710 /* This determines excess precision settings. */
1711 init_excess_precision ();
1713 /* This creates various _DECL nodes, so needs to be called after the
1714 front end is initialized. It also depends on the HAVE_xxx macros
1715 generated from the target machine description. */
1718 /* The following initialization functions need to generate rtl, so
1719 provide a dummy function context for them. */
1720 init_dummy_function_start ();
1722 /* Do the target-specific parts of expr initialization. */
1723 init_expr_target ();
1725 /* Although the actions of these functions are language-independent,
1726 they use optabs, so we cannot call them from backend_init. */
1730 expand_dummy_function_end ();
1733 /* Language-dependent initialization. Returns nonzero on success. */
1735 lang_dependent_init (const char *name
)
1737 location_t save_loc
= input_location
;
1738 if (dump_base_name
== 0)
1739 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1741 /* Other front-end initialization. */
1742 input_location
= BUILTINS_LOCATION
;
1743 if (lang_hooks
.init () == 0)
1745 input_location
= save_loc
;
1749 init_asm_output (name
);
1751 /* If stack usage information is desired, open the output file. */
1752 if (flag_stack_usage
)
1753 stack_usage_file
= open_auxiliary_file ("su");
1756 /* This creates various _DECL nodes, so needs to be called after the
1757 front end is initialized. */
1760 /* Do the target-specific parts of the initialization. */
1761 lang_dependent_init_target ();
1765 /* If dbx symbol table desired, initialize writing it and output the
1766 predefined types. */
1767 timevar_push (TV_SYMOUT
);
1769 /* Now we have the correct original filename, we can initialize
1771 (*debug_hooks
->init
) (name
);
1773 timevar_pop (TV_SYMOUT
);
1780 /* Reinitialize everything when target parameters, such as register usage,
1783 target_reinit (void)
1785 struct rtl_data saved_x_rtl
;
1786 rtx
*saved_regno_reg_rtx
;
1787 tree saved_optimization_current_node
;
1788 struct target_optabs
*saved_this_fn_optabs
;
1790 /* Temporarily switch to the default optimization node, so that
1791 *this_target_optabs is set to the default, not reflecting
1792 whatever a previous function used for the optimize
1794 saved_optimization_current_node
= optimization_current_node
;
1795 saved_this_fn_optabs
= this_fn_optabs
;
1796 if (saved_optimization_current_node
!= optimization_default_node
)
1798 optimization_current_node
= optimization_default_node
;
1799 cl_optimization_restore
1801 TREE_OPTIMIZATION (optimization_default_node
));
1803 this_fn_optabs
= this_target_optabs
;
1805 /* Save *crtl and regno_reg_rtx around the reinitialization
1806 to allow target_reinit being called even after prepare_function_start. */
1807 saved_regno_reg_rtx
= regno_reg_rtx
;
1808 if (saved_regno_reg_rtx
)
1810 saved_x_rtl
= *crtl
;
1811 memset (crtl
, '\0', sizeof (*crtl
));
1812 regno_reg_rtx
= NULL
;
1815 /* Reinitialize RTL backend. */
1816 backend_init_target ();
1818 /* Reinitialize lang-dependent parts. */
1819 lang_dependent_init_target ();
1821 /* Restore the original optimization node. */
1822 if (saved_optimization_current_node
!= optimization_default_node
)
1824 optimization_current_node
= saved_optimization_current_node
;
1825 cl_optimization_restore (&global_options
,
1826 TREE_OPTIMIZATION (optimization_current_node
));
1828 this_fn_optabs
= saved_this_fn_optabs
;
1830 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1831 expand_dummy_function_end clears it. */
1832 if (saved_regno_reg_rtx
)
1834 *crtl
= saved_x_rtl
;
1835 regno_reg_rtx
= saved_regno_reg_rtx
;
1836 saved_regno_reg_rtx
= NULL
;
1841 dump_memory_report (bool final
)
1843 dump_line_table_statistics ();
1844 ggc_print_statistics ();
1845 stringpool_statistics ();
1846 dump_tree_statistics ();
1847 dump_gimple_statistics ();
1848 dump_rtx_statistics ();
1849 dump_alloc_pool_statistics ();
1850 dump_bitmap_statistics ();
1851 dump_vec_loc_statistics ();
1852 dump_ggc_loc_statistics (final
);
1853 dump_alias_stats (stderr
);
1854 dump_pta_stats (stderr
);
1857 /* Clean up: close opened files, etc. */
1860 finalize (bool no_backend
)
1862 /* Close the dump files. */
1863 if (flag_gen_aux_info
)
1865 fclose (aux_info_file
);
1867 unlink (aux_info_file_name
);
1870 /* Close non-debugging input and output files. Take special care to note
1871 whether fclose returns an error, since the pages might still be on the
1872 buffer chain while the file is open. */
1876 if (ferror (asm_out_file
) != 0)
1877 fatal_error ("error writing to %s: %m", asm_file_name
);
1878 if (fclose (asm_out_file
) != 0)
1879 fatal_error ("error closing %s: %m", asm_file_name
);
1882 if (stack_usage_file
)
1883 fclose (stack_usage_file
);
1889 g
->get_passes ()->finish_optimization_passes ();
1895 dump_memory_report (true);
1898 dump_profile_report ();
1900 /* Language-specific end of compilation actions. */
1901 lang_hooks
.finish ();
1904 /* Initialize the compiler, and compile the input file. */
1908 /* Initialize timing first. The C front ends read the main file in
1909 the post_options hook, and C++ does file timings. */
1910 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
1912 timevar_start (TV_TOTAL
);
1916 /* Don't do any more if an error has already occurred. */
1919 timevar_start (TV_PHASE_SETUP
);
1921 /* This must be run always, because it is needed to compute the FP
1922 predefined macros, such as __LDBL_MAX__, for targets using non
1923 default FP formats. */
1924 init_adjust_machine_modes ();
1926 /* Set up the back-end if requested. */
1930 /* Language-dependent initialization. Returns true on success. */
1931 if (lang_dependent_init (main_input_filename
))
1933 /* Initialize yet another pass. */
1935 ggc_protect_identifiers
= true;
1938 init_final (main_input_filename
);
1939 coverage_init (aux_base_name
, main_input_filename
);
1941 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
1943 timevar_stop (TV_PHASE_SETUP
);
1946 if (flag_record_compilation_info_in_elf
)
1947 write_compilation_info_to_asm ();
1951 timevar_stop (TV_PHASE_SETUP
);
1954 timevar_start (TV_PHASE_FINALIZE
);
1956 finalize (no_backend
);
1958 timevar_stop (TV_PHASE_FINALIZE
);
1961 /* Stop timing and print the times. */
1962 timevar_stop (TV_TOTAL
);
1963 timevar_print (stderr
);
1966 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1967 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1968 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1970 It is not safe to call this function more than once. */
1973 toplev_main (int argc
, char **argv
)
1975 /* Parsing and gimplification sometimes need quite large stack.
1976 Increase stack size limits if possible. */
1977 stack_limit_increase (64 * 1024 * 1024);
1979 expandargv (&argc
, &argv
);
1981 /* Initialization of GCC's environment, and diagnostics. */
1982 general_init (argv
[0]);
1984 /* One-off initialization of options that does not need to be
1985 repeated when options are added for particular functions. */
1986 init_options_once ();
1988 /* Initialize global options structures; this must be repeated for
1989 each structure used for parsing options. */
1990 init_options_struct (&global_options
, &global_options_set
);
1991 lang_hooks
.init_options_struct (&global_options
);
1993 /* Convert the options to an array. */
1994 decode_cmdline_options_to_array_default_mask (argc
,
1995 CONST_CAST2 (const char **,
1997 &save_decoded_options
,
1998 &save_decoded_options_count
);
2000 /* Perform language-specific options initialization. */
2001 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2003 /* Parse the options and do minimal processing; basically just
2004 enough to default flags appropriately. */
2005 decode_options (&global_options
, &global_options_set
,
2006 save_decoded_options
, save_decoded_options_count
,
2007 UNKNOWN_LOCATION
, global_dc
);
2009 handle_common_deferred_options ();
2013 initialize_plugins ();
2016 print_version (stderr
, "");
2019 print_plugins_help (stderr
, "");
2021 /* Exit early if we can (e.g. -help). */
2022 if (!exit_after_options
)
2025 if (warningcount
|| errorcount
|| werrorcount
)
2026 print_ignored_options ();
2028 /* Invoke registered plugin callbacks if any. Some plugins could
2029 emit some diagnostics here. */
2030 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2032 diagnostic_finish (global_dc
);
2034 finalize_plugins ();
2035 location_adhoc_data_fini (line_table
);
2036 if (seen_error () || werrorcount
)
2037 return (FATAL_EXIT_CODE
);
2039 return (SUCCESS_EXIT_CODE
);