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"
56 #include "diagnostic.h"
57 #include "tree-diagnostic.h"
58 #include "tree-pretty-print.h"
63 #include "dwarf2asm.h"
66 #include "common/common-target.h"
67 #include "langhooks.h"
68 #include "cfgloop.h" /* for init_set_costs */
69 #include "hosthooks.h"
71 #include "basic-block.h"
74 #include "plugin-api.h"
78 #include "opts-diagnostic.h"
80 #include "value-prof.h"
81 #include "alloc-pool.h"
84 #include "tree-ssa-alias.h"
85 #include "internal-fn.h"
86 #include "gimple-expr.h"
89 #include "diagnostic-color.h"
91 #include "pass_manager.h"
92 #include "auto-profile.h"
93 #include "dwarf2out.h"
95 #include "ipa-reference.h"
100 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
104 #ifdef SDB_DEBUGGING_INFO
108 #ifdef XCOFF_DEBUGGING_INFO
109 #include "xcoffout.h" /* Needed for external data
110 declarations for e.g. AIX 4.x. */
115 static void general_init (const char *);
116 static void do_compile ();
117 static void process_options (void);
118 static void backend_init (void);
119 static int lang_dependent_init (const char *);
120 static void init_asm_output (const char *);
121 static void finalize (bool);
123 static void crash_signal (int) ATTRIBUTE_NORETURN
;
124 static void compile_file (void);
126 /* True if we don't need a backend (e.g. preprocessing only). */
127 static bool no_backend
;
129 /* Length of line when printing switch values. */
132 /* Decoded options, and number of such options. */
133 struct cl_decoded_option
*save_decoded_options
;
134 unsigned int save_decoded_options_count
;
136 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
137 to optimize in process_options (). */
138 #define AUTODETECT_VALUE 2
140 /* Debug hooks - dependent upon command line options. */
142 const struct gcc_debug_hooks
*debug_hooks
;
144 /* The FUNCTION_DECL for the function currently being compiled,
145 or 0 if between functions. */
146 tree current_function_decl
;
148 /* Set to the FUNC_BEGIN label of the current function, or NULL
150 const char * current_function_func_begin_label
;
152 /* A random sequence of characters, unless overridden by user. */
153 static const char *flag_random_seed
;
155 /* A local time stamp derived from the time of compilation. It will be
156 zero if the system cannot provide a time. It will be -1u, if the
157 user has specified a particular random seed. */
160 /* Random number for this compilation */
161 HOST_WIDE_INT random_seed
;
165 /* When non-NULL, indicates that whenever space is allocated on the
166 stack, the resulting stack pointer must not pass this
167 address---that is, for stacks that grow downward, the stack pointer
168 must always be greater than or equal to this address; for stacks
169 that grow upward, the stack pointer must be less than this address.
170 At present, the rtx may be either a REG or a SYMBOL_REF, although
171 the support provided depends on the backend. */
174 /* True if the user has tagged the function with the 'section'
177 bool user_defined_section_attribute
= false;
179 struct target_flag_state default_target_flag_state
;
180 #if SWITCHABLE_TARGET
181 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
183 #define this_target_flag_state (&default_target_flag_state)
186 /* The user symbol prefix after having resolved same. */
187 const char *user_label_prefix
;
189 /* Output files for assembler code (real compiler output)
190 and debugging dumps. */
194 FILE *stack_usage_file
= NULL
;
196 /* The current working directory of a translation. It's generally the
197 directory from which compilation was initiated, but a preprocessed
198 file may specify the original directory in which it was
201 static const char *src_pwd
;
203 /* Initialize src_pwd with the given string, and return true. If it
204 was already initialized, return false. As a special case, it may
205 be called with a NULL argument to test whether src_pwd has NOT been
209 set_src_pwd (const char *pwd
)
213 if (strcmp (src_pwd
, pwd
) == 0)
219 src_pwd
= xstrdup (pwd
);
223 /* Return the directory from which the translation unit was initiated,
224 in case set_src_pwd() was not called before to assign it a
240 /* Called when the start of a function definition is parsed,
241 this function prints on stderr the name of the function. */
243 announce_function (tree decl
)
247 if (rtl_dump_and_exit
)
248 fprintf (stderr
, "%s ",
249 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
251 fprintf (stderr
, " %s",
252 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
254 pp_needs_newline (global_dc
->printer
) = true;
255 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
259 /* Initialize local_tick with a random number or -1 if
260 flag_random_seed is set. */
263 init_local_tick (void)
265 if (!flag_random_seed
)
267 /* Try urandom first. Time of day is too likely to collide.
268 In case of any error we just use the local tick. */
270 int fd
= open ("/dev/urandom", O_RDONLY
);
273 read (fd
, &random_seed
, sizeof (random_seed
));
277 /* Now get the tick anyways */
278 #ifdef HAVE_GETTIMEOFDAY
282 gettimeofday (&tv
, NULL
);
283 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
287 time_t now
= time (NULL
);
289 if (now
!= (time_t)-1)
290 local_tick
= (unsigned) now
;
298 /* Set up a default flag_random_seed and local_tick, unless the user
299 already specified one. Must be called after init_local_tick. */
302 init_random_seed (void)
305 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
308 /* Obtain the random_seed. Unless NOINIT, initialize it if
309 it's not provided in the command line. */
312 get_random_seed (bool noinit
)
314 if (!flag_random_seed
&& !noinit
)
319 /* Modify the random_seed string to VAL. Return its previous
323 set_random_seed (const char *val
)
325 const char *old
= flag_random_seed
;
326 flag_random_seed
= val
;
327 if (flag_random_seed
)
331 /* When the driver passed in a hex number don't crc it again */
332 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
333 if (!(endp
> flag_random_seed
&& *endp
== 0))
334 random_seed
= crc32_string (0, flag_random_seed
);
339 /* Handler for fatal signals, such as SIGSEGV. These are transformed
340 into ICE messages, which is much more user friendly. In case the
341 error printer crashes, reset the signal to prevent infinite recursion. */
344 crash_signal (int signo
)
346 signal (signo
, SIG_DFL
);
348 /* If we crashed while processing an ASM statement, then be a little more
349 graceful. It's most likely the user's fault. */
350 if (this_is_asm_operands
)
352 output_operand_lossage ("unrecoverable error");
353 exit (FATAL_EXIT_CODE
);
356 internal_error ("%s", strsignal (signo
));
359 /* A subroutine of wrapup_global_declarations. We've come to the end of
360 the compilation unit. All deferred variables should be undeferred,
361 and all incomplete decls should be finalized. */
364 wrapup_global_declaration_1 (tree decl
)
366 /* We're not deferring this any longer. Assignment is conditional to
367 avoid needlessly dirtying PCH pages. */
368 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
369 && DECL_DEFER_OUTPUT (decl
) != 0)
370 DECL_DEFER_OUTPUT (decl
) = 0;
372 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
373 lang_hooks
.finish_incomplete_decl (decl
);
376 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
377 needs to be output. Return true if it is output. */
380 wrapup_global_declaration_2 (tree decl
)
382 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
383 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
386 /* Don't write out static consts, unless we still need them.
388 We also keep static consts if not optimizing (for debugging),
389 unless the user specified -fno-keep-static-consts.
390 ??? They might be better written into the debug information.
391 This is possible when using DWARF.
393 A language processor that wants static constants to be always
394 written out (even if it is not used) is responsible for
395 calling rest_of_decl_compilation itself. E.g. the C front-end
396 calls rest_of_decl_compilation from finish_decl.
397 One motivation for this is that is conventional in some
398 environments to write things like:
399 static const char rcsid[] = "... version string ...";
400 intending to force the string to be in the executable.
402 A language processor that would prefer to have unneeded
403 static constants "optimized away" would just defer writing
404 them out until here. E.g. C++ does this, because static
405 constants are often defined in header files.
407 ??? A tempting alternative (for both C and C++) would be
408 to force a constant to be written if and only if it is
409 defined in a main file, as opposed to an include file. */
411 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
415 node
= varpool_node::get (decl
);
417 if (!node
&& flag_ltrans
)
419 else if (node
&& node
->definition
)
421 else if (node
&& node
->alias
)
423 else if (!symtab
->global_info_ready
425 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
427 else if (node
&& node
->analyzed
)
429 else if (DECL_COMDAT (decl
))
431 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
432 && (optimize
|| !flag_keep_static_consts
433 || DECL_ARTIFICIAL (decl
)))
438 rest_of_decl_compilation (decl
, 1, 1);
446 /* Do any final processing required for the declarations in VEC, of
447 which there are LEN. We write out inline functions and variables
448 that have been deferred until this point, but which are required.
449 Returns nonzero if anything was put out. */
452 wrapup_global_declarations (tree
*vec
, int len
)
454 bool reconsider
, output_something
= false;
457 for (i
= 0; i
< len
; i
++)
458 wrapup_global_declaration_1 (vec
[i
]);
460 /* Now emit any global variables or functions that we have been
461 putting off. We need to loop in case one of the things emitted
462 here references another one which comes earlier in the list. */
466 for (i
= 0; i
< len
; i
++)
467 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
469 output_something
= true;
473 return output_something
;
476 /* A subroutine of check_global_declarations. Issue appropriate warnings
477 for the global declaration DECL. */
480 check_global_declaration_1 (tree decl
)
482 /* Warn about any function declared static but not defined. We don't
483 warn about variables, because many programs have static variables
484 that exist only to get some text into the object file. */
485 if (TREE_CODE (decl
) == FUNCTION_DECL
486 && DECL_INITIAL (decl
) == 0
487 && DECL_EXTERNAL (decl
)
488 && ! DECL_ARTIFICIAL (decl
)
489 && ! TREE_NO_WARNING (decl
)
490 && ! TREE_PUBLIC (decl
)
491 && (warn_unused_function
492 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
494 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
495 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
497 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
498 /* This symbol is effectively an "extern" declaration now. */
499 TREE_PUBLIC (decl
) = 1;
502 /* Warn about static fns or vars defined but not used. */
503 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
504 /* We don't warn about "static const" variables because the
505 "rcs_id" idiom uses that construction. */
506 || (warn_unused_variable
507 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
508 && ! DECL_IN_SYSTEM_HEADER (decl
)
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 && ! TREE_PUBLIC (decl
)
515 /* A volatile variable might be used in some non-obvious way. */
516 && ! TREE_THIS_VOLATILE (decl
)
517 /* Global register variables must be declared to reserve them. */
518 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
519 /* Otherwise, ask the language. */
520 && lang_hooks
.decls
.warn_unused_global (decl
))
521 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
522 ? OPT_Wunused_function
523 : OPT_Wunused_variable
,
524 "%q+D defined but not used", decl
);
527 /* Issue appropriate warnings for the global declarations in V (of
528 which there are LEN). */
531 check_global_declarations (tree
*v
, int len
)
535 for (i
= 0; i
< len
; i
++)
536 check_global_declaration_1 (v
[i
]);
539 /* Emit debugging information for all global declarations in VEC. */
542 emit_debug_global_declarations (tree
*vec
, int len
)
546 /* Avoid confusing the debug information machinery when there are errors. */
550 timevar_push (TV_SYMOUT
);
551 for (i
= 0; i
< len
; i
++)
552 debug_hooks
->global_decl (vec
[i
]);
553 timevar_pop (TV_SYMOUT
);
556 /* Compile an entire translation unit. Write a file of assembly
557 output and various debugging dumps. */
562 timevar_start (TV_PHASE_PARSING
);
563 timevar_push (TV_PARSE_GLOBAL
);
565 /* Call the parser, which parses the entire file (calling
566 rest_of_compilation for each function). */
567 lang_hooks
.parse_file ();
569 timevar_pop (TV_PARSE_GLOBAL
);
570 timevar_stop (TV_PHASE_PARSING
);
572 /* Compilation is now finished except for writing
573 what's left of the symbol table output. */
575 if (flag_syntax_only
|| flag_wpa
)
578 ggc_protect_identifiers
= false;
580 /* This must also call finalize_compilation_unit. */
581 lang_hooks
.decls
.final_write_globals ();
586 timevar_start (TV_PHASE_LATE_ASM
);
588 /* Compilation unit is finalized. When producing non-fat LTO object, we are
589 basically finished. */
590 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
592 /* File-scope initialization for AddressSanitizer. */
593 if (flag_sanitize
& SANITIZE_ADDRESS
)
596 if (flag_sanitize
& SANITIZE_THREAD
)
599 output_shared_constant_pool ();
600 output_object_blocks ();
601 finish_tm_clone_pairs ();
603 /* Write out any pending weak symbol declarations. */
606 /* This must be at the end before unwind and debug info.
607 Some target ports emit PIC setup thunks here. */
608 targetm
.asm_out
.code_end ();
610 /* Do dbx symbols. */
611 timevar_push (TV_SYMOUT
);
613 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
614 if (dwarf2out_do_frame ())
615 dwarf2out_frame_finish ();
618 (*debug_hooks
->finish
) (main_input_filename
);
619 timevar_pop (TV_SYMOUT
);
621 /* Output some stuff at end of file if nec. */
623 dw2_output_indirect_constants ();
625 /* Flush any pending external directives. */
626 process_pending_assemble_externals ();
629 /* Emit LTO marker if LTO info has been previously emitted. This is
630 used by collect2 to determine whether an object file contains IL.
631 We used to emit an undefined reference here, but this produces
632 link errors if an object file with IL is stored into a shared
633 library without invoking lto1. */
634 if (flag_generate_lto
)
636 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
637 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
639 (unsigned HOST_WIDE_INT
) 1, 8);
640 #elif defined ASM_OUTPUT_ALIGNED_COMMON
641 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
642 (unsigned HOST_WIDE_INT
) 1, 8);
644 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
645 (unsigned HOST_WIDE_INT
) 1,
646 (unsigned HOST_WIDE_INT
) 1);
648 /* Let linker plugin know that this is a slim object and must be LTOed
649 even when user did not ask for it. */
650 if (!flag_fat_lto_objects
)
652 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
653 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
655 (unsigned HOST_WIDE_INT
) 1, 8);
656 #elif defined ASM_OUTPUT_ALIGNED_COMMON
657 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
658 (unsigned HOST_WIDE_INT
) 1, 8);
660 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
661 (unsigned HOST_WIDE_INT
) 1,
662 (unsigned HOST_WIDE_INT
) 1);
667 /* Attach a special .ident directive to the end of the file to identify
668 the version of GCC which compiled this code. The format of the .ident
669 string is patterned after the ones produced by native SVR4 compilers. */
672 const char *pkg_version
= "(GNU) ";
675 if (strcmp ("(GCC) ", pkgversion_string
))
676 pkg_version
= pkgversion_string
;
678 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
679 targetm
.asm_out
.output_ident (ident_str
);
682 /* Auto profile finalization. */
683 if (flag_auto_profile
)
686 /* Invoke registered plugin callbacks. */
687 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
689 /* This must be at the end. Some target ports emit end of file directives
690 into the assembly file here, and hence we can not output anything to the
691 assembly file after this point. */
692 targetm
.asm_out
.file_end ();
694 timevar_stop (TV_PHASE_LATE_ASM
);
697 /* Print version information to FILE.
698 Each line begins with INDENT (for the case where FILE is the
699 assembler output file). */
702 print_version (FILE *file
, const char *indent
)
704 static const char fmt1
[] =
706 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
708 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
711 static const char fmt2
[] =
712 N_("GMP version %s, MPFR version %s, MPC version %s\n");
713 static const char fmt3
[] =
714 N_("%s%swarning: %s header version %s differs from library version %s.\n");
715 static const char fmt4
[] =
716 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
718 #define __VERSION__ "[?]"
721 file
== stderr
? _(fmt1
) : fmt1
,
722 indent
, *indent
!= 0 ? " " : "",
723 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
724 indent
, __VERSION__
);
726 /* We need to stringify the GMP macro values. Ugh, gmp_version has
727 two string formats, "i.j.k" and "i.j" when k is zero. As of
728 gmp-4.3.0, GMP always uses the 3 number format. */
729 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
730 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
731 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
732 #define GCC_GMP_VERSION \
733 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
734 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
735 #define GCC_GMP_STRINGIFY_VERSION \
736 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
737 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
739 #define GCC_GMP_STRINGIFY_VERSION \
740 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
741 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
742 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
745 file
== stderr
? _(fmt2
) : fmt2
,
746 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
747 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
749 file
== stderr
? _(fmt3
) : fmt3
,
750 indent
, *indent
!= 0 ? " " : "",
751 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
752 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
754 file
== stderr
? _(fmt3
) : fmt3
,
755 indent
, *indent
!= 0 ? " " : "",
756 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
757 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
759 file
== stderr
? _(fmt3
) : fmt3
,
760 indent
, *indent
!= 0 ? " " : "",
761 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
763 file
== stderr
? _(fmt4
) : fmt4
,
764 indent
, *indent
!= 0 ? " " : "",
765 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
767 print_plugins_versions (file
, indent
);
771 print_to_asm_out_file (print_switch_type type
, const char * text
)
773 bool prepend_sep
= true;
777 case SWITCH_TYPE_LINE_END
:
778 putc ('\n', asm_out_file
);
781 case SWITCH_TYPE_LINE_START
:
782 fputs (ASM_COMMENT_START
, asm_out_file
);
783 return strlen (ASM_COMMENT_START
);
785 case SWITCH_TYPE_DESCRIPTIVE
:
786 if (ASM_COMMENT_START
[0] == 0)
789 case SWITCH_TYPE_PASSED
:
790 case SWITCH_TYPE_ENABLED
:
792 fputc (' ', asm_out_file
);
793 fputs (text
, asm_out_file
);
794 /* No need to return the length here as
795 print_single_switch has already done it. */
804 print_to_stderr (print_switch_type type
, const char * text
)
808 case SWITCH_TYPE_LINE_END
:
812 case SWITCH_TYPE_LINE_START
:
815 case SWITCH_TYPE_PASSED
:
816 case SWITCH_TYPE_ENABLED
:
820 case SWITCH_TYPE_DESCRIPTIVE
:
821 fputs (text
, stderr
);
822 /* No need to return the length here as
823 print_single_switch has already done it. */
831 /* Print an option value and return the adjusted position in the line.
832 ??? print_fn doesn't handle errors, eg disk full; presumably other
833 code will catch a disk full though. */
836 print_single_switch (print_switch_fn_type print_fn
,
838 print_switch_type type
,
841 /* The ultrix fprintf returns 0 on success, so compute the result
842 we want here since we need it for the following test. The +1
843 is for the separator character that will probably be emitted. */
844 int len
= strlen (text
) + 1;
847 && pos
+ len
> MAX_LINE
)
849 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
854 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
856 print_fn (type
, text
);
860 /* Print active target switches using PRINT_FN.
861 POS is the current cursor position and MAX is the size of a "line".
862 Each line begins with INDENT and ends with TERM.
863 Each switch is separated from the next by SEP. */
866 print_switch_values (print_switch_fn_type print_fn
)
871 /* Fill in the -frandom-seed option, if the user didn't pass it, so
872 that it can be printed below. This helps reproducibility. */
873 if (!flag_random_seed
)
876 /* Print the options as passed. */
877 pos
= print_single_switch (print_fn
, pos
,
878 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
880 for (j
= 1; j
< save_decoded_options_count
; j
++)
882 switch (save_decoded_options
[j
].opt_index
)
895 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
896 save_decoded_options
[j
].orig_option_with_args_text
);
900 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
902 /* Print the -f and -m options that have been enabled.
903 We don't handle language specific options but printing argv
905 pos
= print_single_switch (print_fn
, 0,
906 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
908 for (j
= 0; j
< cl_options_count
; j
++)
909 if (cl_options
[j
].cl_report
910 && option_enabled (j
, &global_options
) > 0)
911 pos
= print_single_switch (print_fn
, pos
,
912 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
914 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
917 /* Open assembly code output file. Do this even if -fsyntax-only is
918 on, because then the driver will have provided the name of a
919 temporary file or bit bucket for us. NAME is the file specified on
920 the command line, possibly NULL. */
922 init_asm_output (const char *name
)
924 if (name
== NULL
&& asm_file_name
== 0)
925 asm_out_file
= stdout
;
928 if (asm_file_name
== 0)
930 int len
= strlen (dump_base_name
);
931 char *dumpname
= XNEWVEC (char, len
+ 6);
933 memcpy (dumpname
, dump_base_name
, len
+ 1);
934 strip_off_ending (dumpname
, len
);
935 strcat (dumpname
, ".s");
936 asm_file_name
= dumpname
;
938 if (!strcmp (asm_file_name
, "-"))
939 asm_out_file
= stdout
;
941 asm_out_file
= fopen (asm_file_name
, "w");
942 if (asm_out_file
== 0)
943 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
946 if (!flag_syntax_only
)
948 targetm
.asm_out
.file_start ();
950 if (flag_record_gcc_switches
)
952 if (targetm
.asm_out
.record_gcc_switches
)
954 /* Let the target know that we are about to start recording. */
955 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
957 /* Now record the switches. */
958 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
959 /* Let the target know that the recording is over. */
960 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
964 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
967 if (flag_verbose_asm
)
969 /* Print the list of switches in effect
970 into the assembler file as comments. */
971 print_version (asm_out_file
, ASM_COMMENT_START
);
972 print_switch_values (print_to_asm_out_file
);
973 putc ('\n', asm_out_file
);
978 /* A helper function; used as the reallocator function for cpp's line
981 realloc_for_line_map (void *ptr
, size_t len
)
983 return ggc_realloc (ptr
, len
);
986 /* A helper function: used as the allocator function for
987 identifier_to_locale. */
989 alloc_for_identifier_to_locale (size_t len
)
991 return ggc_alloc_atomic (len
);
994 /* Output stack usage information. */
996 output_stack_usage (void)
998 static bool warning_issued
= false;
999 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
1000 const char *stack_usage_kind_str
[] = {
1005 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
1006 enum stack_usage_kind_type stack_usage_kind
;
1008 if (stack_usage
< 0)
1010 if (!warning_issued
)
1012 warning (0, "stack usage computation not supported for this target");
1013 warning_issued
= true;
1018 stack_usage_kind
= STATIC
;
1020 /* Add the maximum amount of space pushed onto the stack. */
1021 if (current_function_pushed_stack_size
> 0)
1023 stack_usage
+= current_function_pushed_stack_size
;
1024 stack_usage_kind
= DYNAMIC_BOUNDED
;
1027 /* Now on to the tricky part: dynamic stack allocation. */
1028 if (current_function_allocates_dynamic_stack_space
)
1030 if (current_function_has_unbounded_dynamic_stack_size
)
1031 stack_usage_kind
= DYNAMIC
;
1033 stack_usage_kind
= DYNAMIC_BOUNDED
;
1035 /* Add the size even in the unbounded case, this can't hurt. */
1036 stack_usage
+= current_function_dynamic_stack_size
;
1039 if (flag_stack_usage
)
1041 expanded_location loc
1042 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1043 /* We don't want to print the full qualified name because it can be long,
1044 so we strip the scope prefix, but we may need to deal with the suffix
1045 created by the compiler. */
1047 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1049 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1052 const char *dot
= strchr (name
, '.');
1053 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1056 dot
= strchr (name
, '.');
1061 const char *dot
= strrchr (name
, '.');
1066 fprintf (stack_usage_file
,
1067 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1068 lbasename (loc
.file
),
1073 stack_usage_kind_str
[stack_usage_kind
]);
1076 if (warn_stack_usage
>= 0)
1078 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1080 if (stack_usage_kind
== DYNAMIC
)
1081 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1082 else if (stack_usage
> warn_stack_usage
)
1084 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1086 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1089 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1095 /* Open an auxiliary output file. */
1097 open_auxiliary_file (const char *ext
)
1102 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1103 file
= fopen (filename
, "w");
1105 fatal_error ("can%'t open %s for writing: %m", filename
);
1110 /* Initialization of the front end environment, before command line
1111 options are parsed. Signal handlers, internationalization etc.
1112 ARGV0 is main's argv[0]. */
1114 general_init (const char *argv0
)
1118 p
= argv0
+ strlen (argv0
);
1119 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1123 xmalloc_set_program_name (progname
);
1127 /* Unlock the stdio streams. */
1128 unlock_std_streams ();
1130 gcc_init_libintl ();
1132 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1133 identifier_to_locale_free
= ggc_free
;
1135 /* Initialize the diagnostics reporting machinery, so option parsing
1136 can give warnings and errors. */
1137 diagnostic_initialize (global_dc
, N_OPTS
);
1138 /* Set a default printer. Language specific initializations will
1139 override it later. */
1140 tree_diagnostics_defaults (global_dc
);
1142 global_dc
->show_caret
1143 = global_options_init
.x_flag_diagnostics_show_caret
;
1144 global_dc
->show_option_requested
1145 = global_options_init
.x_flag_diagnostics_show_option
;
1146 global_dc
->show_column
1147 = global_options_init
.x_flag_show_column
;
1148 global_dc
->internal_error
= plugins_internal_error_function
;
1149 global_dc
->option_enabled
= option_enabled
;
1150 global_dc
->option_state
= &global_options
;
1151 global_dc
->option_name
= option_name
;
1153 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1155 signal (SIGSEGV
, crash_signal
);
1158 signal (SIGILL
, crash_signal
);
1161 signal (SIGBUS
, crash_signal
);
1164 signal (SIGABRT
, crash_signal
);
1166 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1167 signal (SIGIOT
, crash_signal
);
1170 signal (SIGFPE
, crash_signal
);
1173 /* Other host-specific signal setup. */
1174 (*host_hooks
.extra_signals
)();
1176 /* Initialize the garbage-collector, string pools and tree type hash
1180 input_location
= UNKNOWN_LOCATION
;
1181 line_table
= ggc_alloc
<line_maps
> ();
1182 linemap_init (line_table
, BUILTINS_LOCATION
);
1183 line_table
->reallocator
= realloc_for_line_map
;
1184 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1187 /* Initialize register usage now so switches may override. */
1190 /* Register the language-independent parameters. */
1191 global_init_params ();
1193 /* This must be done after global_init_params but before argument
1195 init_ggc_heuristics ();
1197 /* Create the singleton holder for global state.
1198 Doing so also creates the pass manager and with it the passes. */
1199 g
= new gcc::context ();
1200 symtab
= ggc_cleared_alloc
<symbol_table
> ();
1202 statistics_early_init ();
1206 /* Return true if the current target supports -fsection-anchors. */
1209 target_supports_section_anchors_p (void)
1211 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1214 if (targetm
.asm_out
.output_anchor
== NULL
)
1220 /* Default the align_* variables to 1 if they're still unset, and
1221 set up the align_*_log variables. */
1223 init_alignments (void)
1225 if (align_loops
<= 0)
1227 if (align_loops_max_skip
> align_loops
)
1228 align_loops_max_skip
= align_loops
- 1;
1229 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1230 if (align_jumps
<= 0)
1232 if (align_jumps_max_skip
> align_jumps
)
1233 align_jumps_max_skip
= align_jumps
- 1;
1234 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1235 if (align_labels
<= 0)
1237 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1238 if (align_labels_max_skip
> align_labels
)
1239 align_labels_max_skip
= align_labels
- 1;
1240 if (align_functions
<= 0)
1241 align_functions
= 1;
1242 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1245 /* Process the options that have been parsed. */
1247 process_options (void)
1249 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1250 This can happen with incorrect pre-processed input. */
1251 debug_hooks
= &do_nothing_debug_hooks
;
1253 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1255 /* Default to -fdiagnostics-color=auto if GCC_COLORS is in the environment,
1256 otherwise default to -fdiagnostics-color=never. */
1257 if (!global_options_set
.x_flag_diagnostics_show_color
1258 && getenv ("GCC_COLORS"))
1259 pp_show_color (global_dc
->printer
)
1260 = colorize_init (DIAGNOSTICS_COLOR_AUTO
);
1262 /* Allow the front end to perform consistency checks and do further
1263 initialization based on the command line options. This hook also
1264 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1265 so we can correctly initialize debug output. */
1266 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1268 /* Some machines may reject certain combinations of options. */
1269 targetm
.target_option
.override ();
1271 /* Avoid any informative notes in the second run of -fcompare-debug. */
1272 if (flag_compare_debug
)
1273 diagnostic_inhibit_notes (global_dc
);
1275 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1277 warning (OPT_fsection_anchors
,
1278 "this target does not support %qs", "-fsection-anchors");
1279 flag_section_anchors
= 0;
1282 if (flag_short_enums
== 2)
1283 flag_short_enums
= targetm
.default_short_enums ();
1285 /* Set aux_base_name if not already set. */
1288 else if (main_input_filename
)
1290 char *name
= xstrdup (lbasename (main_input_filename
));
1292 strip_off_ending (name
, strlen (name
));
1293 aux_base_name
= name
;
1296 aux_base_name
= "gccaux";
1300 || flag_graphite_identity
1302 || flag_loop_interchange
1303 || flag_loop_strip_mine
1304 || flag_loop_parallelize_all
)
1305 sorry ("Graphite loop optimizations cannot be used (ISL is not available)"
1306 "(-fgraphite, -fgraphite-identity, -floop-block, "
1307 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1308 "and -ftree-loop-linear)");
1311 /* One region RA really helps to decrease the code size. */
1312 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1314 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1316 if (!abi_version_at_least (2))
1318 /* -fabi-version=1 support was removed after GCC 4.9. */
1319 error ("%<-fabi-version=1%> is no longer supported");
1320 flag_abi_version
= 2;
1323 /* Unrolling all loops implies that standard loop unrolling must also
1325 if (flag_unroll_all_loops
)
1326 flag_unroll_loops
= 1;
1328 /* web and rename-registers help when run after loop unrolling. */
1329 if (flag_web
== AUTODETECT_VALUE
)
1330 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1332 if (flag_rename_registers
== AUTODETECT_VALUE
)
1333 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1335 if (flag_non_call_exceptions
)
1336 flag_asynchronous_unwind_tables
= 1;
1337 if (flag_asynchronous_unwind_tables
)
1338 flag_unwind_tables
= 1;
1340 if (flag_value_profile_transformations
)
1341 flag_profile_values
= 1;
1343 /* Warn about options that are not supported on this machine. */
1344 #ifndef INSN_SCHEDULING
1345 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1346 warning (0, "instruction scheduling not supported on this target machine");
1349 if (flag_delayed_branch
)
1350 warning (0, "this target machine does not have delayed branches");
1353 user_label_prefix
= USER_LABEL_PREFIX
;
1354 if (flag_leading_underscore
!= -1)
1356 /* If the default prefix is more complicated than "" or "_",
1357 issue a warning and ignore this option. */
1358 if (user_label_prefix
[0] == 0 ||
1359 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1361 user_label_prefix
= flag_leading_underscore
? "_" : "";
1364 warning (0, "-f%sleading-underscore not supported on this target machine",
1365 flag_leading_underscore
? "" : "no-");
1368 /* If we are in verbose mode, write out the version and maybe all the
1369 option flags in use. */
1372 print_version (stderr
, "");
1374 print_switch_values (print_to_stderr
);
1377 if (flag_syntax_only
)
1379 write_symbols
= NO_DEBUG
;
1385 if (debug_info_level
== DINFO_LEVEL_NONE
)
1387 debug_info_level
= DINFO_LEVEL_NORMAL
;
1389 if (write_symbols
== NO_DEBUG
)
1390 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1393 debug_info_level
= DINFO_LEVEL_NONE
;
1396 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1398 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1401 error ("could not open final insn dump file %qs: %m",
1402 flag_dump_final_insns
);
1403 flag_dump_final_insns
= NULL
;
1405 else if (fclose (final_output
))
1407 error ("could not close zeroed insn dump file %qs: %m",
1408 flag_dump_final_insns
);
1409 flag_dump_final_insns
= NULL
;
1413 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1415 if (debug_info_level
== DINFO_LEVEL_NONE
)
1416 write_symbols
= NO_DEBUG
;
1418 if (write_symbols
== NO_DEBUG
)
1420 #if defined(DBX_DEBUGGING_INFO)
1421 else if (write_symbols
== DBX_DEBUG
)
1422 debug_hooks
= &dbx_debug_hooks
;
1424 #if defined(XCOFF_DEBUGGING_INFO)
1425 else if (write_symbols
== XCOFF_DEBUG
)
1426 debug_hooks
= &xcoff_debug_hooks
;
1428 #ifdef SDB_DEBUGGING_INFO
1429 else if (write_symbols
== SDB_DEBUG
)
1430 debug_hooks
= &sdb_debug_hooks
;
1432 #ifdef DWARF2_DEBUGGING_INFO
1433 else if (write_symbols
== DWARF2_DEBUG
)
1434 debug_hooks
= &dwarf2_debug_hooks
;
1436 #ifdef VMS_DEBUGGING_INFO
1437 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1438 debug_hooks
= &vmsdbg_debug_hooks
;
1441 error ("target system does not support the \"%s\" debug format",
1442 debug_type_names
[write_symbols
]);
1444 /* We know which debug output will be used so we can set flag_var_tracking
1445 and flag_var_tracking_uninit if the user has not specified them. */
1446 if (debug_info_level
< DINFO_LEVEL_NORMAL
1447 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1449 if (flag_var_tracking
== 1
1450 || flag_var_tracking_uninit
== 1)
1452 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1453 warning (0, "variable tracking requested, but useless unless "
1454 "producing debug info");
1456 warning (0, "variable tracking requested, but not supported "
1457 "by this debug format");
1459 flag_var_tracking
= 0;
1460 flag_var_tracking_uninit
= 0;
1463 /* The debug hooks are used to implement -fdump-go-spec because it
1464 gives a simple and stable API for all the information we need to
1466 if (flag_dump_go_spec
!= NULL
)
1467 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1469 /* If the user specifically requested variable tracking with tagging
1470 uninitialized variables, we need to turn on variable tracking.
1471 (We already determined above that variable tracking is feasible.) */
1472 if (flag_var_tracking_uninit
== 1)
1473 flag_var_tracking
= 1;
1475 if (flag_var_tracking
== AUTODETECT_VALUE
)
1476 flag_var_tracking
= optimize
>= 1;
1478 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1479 flag_var_tracking_uninit
= flag_var_tracking
;
1481 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1482 flag_var_tracking_assignments
= flag_var_tracking
1483 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1485 if (flag_var_tracking_assignments_toggle
)
1486 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1488 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1489 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1491 if (flag_var_tracking_assignments
1492 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1493 warning (0, "var-tracking-assignments changes selective scheduling");
1495 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1496 #ifdef HAVE_conditional_move
1497 flag_tree_cselim
= 1;
1499 flag_tree_cselim
= 0;
1502 /* If auxiliary info generation is desired, open the output file.
1503 This goes in the same directory as the source file--unlike
1504 all the other output files. */
1505 if (flag_gen_aux_info
)
1507 aux_info_file
= fopen (aux_info_file_name
, "w");
1508 if (aux_info_file
== 0)
1509 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1512 if (!targetm_common
.have_named_sections
)
1514 if (flag_function_sections
)
1516 warning (0, "-ffunction-sections not supported for this target");
1517 flag_function_sections
= 0;
1519 if (flag_data_sections
)
1521 warning (0, "-fdata-sections not supported for this target");
1522 flag_data_sections
= 0;
1526 #ifndef HAVE_prefetch
1527 if (flag_prefetch_loop_arrays
> 0)
1529 warning (0, "-fprefetch-loop-arrays not supported for this target");
1530 flag_prefetch_loop_arrays
= 0;
1533 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1535 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1536 flag_prefetch_loop_arrays
= 0;
1540 /* This combination of options isn't handled for i386 targets and doesn't
1541 make much sense anyway, so don't allow it. */
1542 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1544 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1545 flag_prefetch_loop_arrays
= 0;
1548 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1549 if (flag_signaling_nans
)
1550 flag_trapping_math
= 1;
1552 /* We cannot reassociate if we want traps or signed zeros. */
1553 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1555 warning (0, "-fassociative-math disabled; other options take precedence");
1556 flag_associative_math
= 0;
1559 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1560 if (flag_cx_limited_range
)
1561 flag_complex_method
= 0;
1563 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1564 if (flag_cx_fortran_rules
)
1565 flag_complex_method
= 1;
1567 /* Targets must be able to place spill slots at lower addresses. If the
1568 target already uses a soft frame pointer, the transition is trivial. */
1569 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1571 warning (0, "-fstack-protector not supported for this target");
1572 flag_stack_protect
= 0;
1574 if (!flag_stack_protect
)
1575 warn_stack_protect
= 0;
1577 /* Address Sanitizer needs porting to each target architecture. */
1579 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1580 && !FRAME_GROWS_DOWNWARD
)
1583 "-fsanitize=address and -fsanitize=kernel-address "
1584 "are not supported for this target");
1585 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1588 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1589 && targetm
.asan_shadow_offset
== NULL
)
1591 warning (0, "-fsanitize=address not supported for this target");
1592 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1595 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1596 have not been set. */
1597 if (!global_options_set
.x_warnings_are_errors
1598 && warn_coverage_mismatch
1599 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1601 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1602 DK_ERROR
, UNKNOWN_LOCATION
);
1604 /* Save the current optimization options. */
1605 optimization_default_node
= build_optimization_node (&global_options
);
1606 optimization_current_node
= optimization_default_node
;
1609 /* This function can be called multiple times to reinitialize the compiler
1610 back end when register classes or instruction sets have changed,
1611 before each function. */
1613 backend_init_target (void)
1615 /* Initialize alignment variables. */
1618 /* This depends on stack_pointer_rtx. */
1619 init_fake_stack_mems ();
1621 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1623 init_alias_target ();
1625 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1628 /* Depends on the enabled attribute. */
1631 /* The following initialization functions need to generate rtl, so
1632 provide a dummy function context for them. */
1633 init_dummy_function_start ();
1635 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1636 on a mode change. */
1638 init_lower_subreg ();
1641 init_expr_target ();
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 /* Middle end needs this initialization for default mem attributes
1664 used by early calls to make_decl_rtl. */
1667 /* Middle end needs this initialization for mode tables used to assign
1668 modes to vector variables. */
1672 /* Initialize excess precision settings. */
1674 init_excess_precision (void)
1676 /* Adjust excess precision handling based on the target options. If
1677 the front end cannot handle it, flag_excess_precision_cmdline
1678 will already have been set accordingly in the post_options
1680 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1681 flag_excess_precision
= flag_excess_precision_cmdline
;
1682 if (flag_unsafe_math_optimizations
)
1683 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1684 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1686 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1687 switch (flt_eval_method
)
1691 /* Either the target acts unpredictably (-1) or has all the
1692 operations required not to have excess precision (0). */
1693 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1697 /* In these cases, predictable excess precision makes
1701 /* Any other implementation-defined FLT_EVAL_METHOD values
1702 require the compiler to handle the associated excess
1703 precision rules in excess_precision_type. */
1709 /* Initialize things that are both lang-dependent and target-dependent.
1710 This function can be called more than once if target parameters change. */
1712 lang_dependent_init_target (void)
1714 /* This determines excess precision settings. */
1715 init_excess_precision ();
1717 /* This creates various _DECL nodes, so needs to be called after the
1718 front end is initialized. It also depends on the HAVE_xxx macros
1719 generated from the target machine description. */
1722 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1725 /* Perform initializations that are lang-dependent or target-dependent.
1726 but matters only for late optimizations and RTL generation. */
1728 static int rtl_initialized
;
1731 initialize_rtl (void)
1733 /* Initialization done just once per compilation, but delayed
1734 till code generation. */
1735 if (!rtl_initialized
)
1737 rtl_initialized
= true;
1739 /* Target specific RTL backend initialization. */
1740 if (!this_target_rtl
->target_specific_initialized
)
1742 backend_init_target ();
1743 this_target_rtl
->target_specific_initialized
= true;
1747 /* Language-dependent initialization. Returns nonzero on success. */
1749 lang_dependent_init (const char *name
)
1751 location_t save_loc
= input_location
;
1752 if (dump_base_name
== 0)
1753 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1755 /* Other front-end initialization. */
1756 input_location
= BUILTINS_LOCATION
;
1757 if (lang_hooks
.init () == 0)
1759 input_location
= save_loc
;
1763 init_asm_output (name
);
1765 /* If stack usage information is desired, open the output file. */
1766 if (flag_stack_usage
)
1767 stack_usage_file
= open_auxiliary_file ("su");
1770 /* This creates various _DECL nodes, so needs to be called after the
1771 front end is initialized. */
1774 /* Do the target-specific parts of the initialization. */
1775 lang_dependent_init_target ();
1779 /* If dbx symbol table desired, initialize writing it and output the
1780 predefined types. */
1781 timevar_push (TV_SYMOUT
);
1783 /* Now we have the correct original filename, we can initialize
1785 (*debug_hooks
->init
) (name
);
1787 timevar_pop (TV_SYMOUT
);
1794 /* Reinitialize everything when target parameters, such as register usage,
1797 target_reinit (void)
1799 struct rtl_data saved_x_rtl
;
1800 rtx
*saved_regno_reg_rtx
;
1801 tree saved_optimization_current_node
;
1802 struct target_optabs
*saved_this_fn_optabs
;
1804 /* Temporarily switch to the default optimization node, so that
1805 *this_target_optabs is set to the default, not reflecting
1806 whatever a previous function used for the optimize
1808 saved_optimization_current_node
= optimization_current_node
;
1809 saved_this_fn_optabs
= this_fn_optabs
;
1810 if (saved_optimization_current_node
!= optimization_default_node
)
1812 optimization_current_node
= optimization_default_node
;
1813 cl_optimization_restore
1815 TREE_OPTIMIZATION (optimization_default_node
));
1817 this_fn_optabs
= this_target_optabs
;
1819 /* Save *crtl and regno_reg_rtx around the reinitialization
1820 to allow target_reinit being called even after prepare_function_start. */
1821 saved_regno_reg_rtx
= regno_reg_rtx
;
1822 if (saved_regno_reg_rtx
)
1824 saved_x_rtl
= *crtl
;
1825 memset (crtl
, '\0', sizeof (*crtl
));
1826 regno_reg_rtx
= NULL
;
1829 this_target_rtl
->target_specific_initialized
= false;
1831 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1832 to initialize reg_raw_mode[]. */
1835 /* This invokes target hooks to set fixed_reg[] etc, which is
1839 /* Reinitialize lang-dependent parts. */
1840 lang_dependent_init_target ();
1842 /* Restore the original optimization node. */
1843 if (saved_optimization_current_node
!= optimization_default_node
)
1845 optimization_current_node
= saved_optimization_current_node
;
1846 cl_optimization_restore (&global_options
,
1847 TREE_OPTIMIZATION (optimization_current_node
));
1849 this_fn_optabs
= saved_this_fn_optabs
;
1851 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1852 expand_dummy_function_end clears it. */
1853 if (saved_regno_reg_rtx
)
1855 *crtl
= saved_x_rtl
;
1856 regno_reg_rtx
= saved_regno_reg_rtx
;
1857 saved_regno_reg_rtx
= NULL
;
1862 dump_memory_report (bool final
)
1864 dump_line_table_statistics ();
1865 ggc_print_statistics ();
1866 stringpool_statistics ();
1867 dump_tree_statistics ();
1868 dump_gimple_statistics ();
1869 dump_rtx_statistics ();
1870 dump_alloc_pool_statistics ();
1871 dump_bitmap_statistics ();
1872 dump_vec_loc_statistics ();
1873 dump_ggc_loc_statistics (final
);
1874 dump_alias_stats (stderr
);
1875 dump_pta_stats (stderr
);
1878 /* Clean up: close opened files, etc. */
1881 finalize (bool no_backend
)
1883 /* Close the dump files. */
1884 if (flag_gen_aux_info
)
1886 fclose (aux_info_file
);
1888 unlink (aux_info_file_name
);
1891 /* Close non-debugging input and output files. Take special care to note
1892 whether fclose returns an error, since the pages might still be on the
1893 buffer chain while the file is open. */
1897 if (ferror (asm_out_file
) != 0)
1898 fatal_error ("error writing to %s: %m", asm_file_name
);
1899 if (fclose (asm_out_file
) != 0)
1900 fatal_error ("error closing %s: %m", asm_file_name
);
1903 if (stack_usage_file
)
1904 fclose (stack_usage_file
);
1910 g
->get_passes ()->finish_optimization_passes ();
1916 dump_memory_report (true);
1919 dump_profile_report ();
1921 /* Language-specific end of compilation actions. */
1922 lang_hooks
.finish ();
1926 standard_type_bitsize (int bitsize
)
1928 /* As a special exception, we always want __int128 enabled if possible. */
1931 if (bitsize
== CHAR_TYPE_SIZE
1932 || bitsize
== SHORT_TYPE_SIZE
1933 || bitsize
== INT_TYPE_SIZE
1934 || bitsize
== LONG_TYPE_SIZE
1935 || bitsize
== LONG_LONG_TYPE_SIZE
)
1940 /* Initialize the compiler, and compile the input file. */
1946 /* Don't do any more if an error has already occurred. */
1951 timevar_start (TV_PHASE_SETUP
);
1953 /* This must be run always, because it is needed to compute the FP
1954 predefined macros, such as __LDBL_MAX__, for targets using non
1955 default FP formats. */
1956 init_adjust_machine_modes ();
1957 init_derived_machine_modes ();
1959 /* This must happen after the backend has a chance to process
1960 command line options, but before the parsers are
1962 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
1963 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
1964 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
1965 int_n_enabled_p
[i
] = true;
1967 int_n_enabled_p
[i
] = false;
1969 /* Set up the back-end if requested. */
1973 /* Language-dependent initialization. Returns true on success. */
1974 if (lang_dependent_init (main_input_filename
))
1976 /* Initialize yet another pass. */
1978 ggc_protect_identifiers
= true;
1980 symtab
->initialize ();
1981 init_final (main_input_filename
);
1982 coverage_init (aux_base_name
);
1984 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
1986 timevar_stop (TV_PHASE_SETUP
);
1992 timevar_stop (TV_PHASE_SETUP
);
1995 timevar_start (TV_PHASE_FINALIZE
);
1997 finalize (no_backend
);
1999 timevar_stop (TV_PHASE_FINALIZE
);
2003 toplev::toplev (bool use_TV_TOTAL
)
2004 : m_use_TV_TOTAL (use_TV_TOTAL
)
2006 if (!m_use_TV_TOTAL
)
2012 timevar_stop (TV_TOTAL
);
2013 timevar_print (stderr
);
2017 toplev::start_timevars ()
2019 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2022 timevar_start (TV_TOTAL
);
2025 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2026 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2027 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2029 It is not safe to call this function more than once. */
2032 toplev::main (int argc
, char **argv
)
2034 /* Parsing and gimplification sometimes need quite large stack.
2035 Increase stack size limits if possible. */
2036 stack_limit_increase (64 * 1024 * 1024);
2038 expandargv (&argc
, &argv
);
2040 /* Initialization of GCC's environment, and diagnostics. */
2041 general_init (argv
[0]);
2043 /* One-off initialization of options that does not need to be
2044 repeated when options are added for particular functions. */
2045 init_options_once ();
2047 /* Initialize global options structures; this must be repeated for
2048 each structure used for parsing options. */
2049 init_options_struct (&global_options
, &global_options_set
);
2050 lang_hooks
.init_options_struct (&global_options
);
2052 /* Convert the options to an array. */
2053 decode_cmdline_options_to_array_default_mask (argc
,
2054 CONST_CAST2 (const char **,
2056 &save_decoded_options
,
2057 &save_decoded_options_count
);
2059 /* Perform language-specific options initialization. */
2060 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2062 /* Parse the options and do minimal processing; basically just
2063 enough to default flags appropriately. */
2064 decode_options (&global_options
, &global_options_set
,
2065 save_decoded_options
, save_decoded_options_count
,
2066 UNKNOWN_LOCATION
, global_dc
);
2068 handle_common_deferred_options ();
2072 initialize_plugins ();
2075 print_version (stderr
, "");
2078 print_plugins_help (stderr
, "");
2080 /* Exit early if we can (e.g. -help). */
2081 if (!exit_after_options
)
2088 if (warningcount
|| errorcount
|| werrorcount
)
2089 print_ignored_options ();
2091 /* Invoke registered plugin callbacks if any. Some plugins could
2092 emit some diagnostics here. */
2093 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2095 diagnostic_finish (global_dc
);
2097 finalize_plugins ();
2098 location_adhoc_data_fini (line_table
);
2099 if (seen_error () || werrorcount
)
2100 return (FATAL_EXIT_CODE
);
2102 return (SUCCESS_EXIT_CODE
);
2105 /* For those that want to, this function aims to clean up enough state that
2106 you can call toplev::main again. */
2108 toplev::finalize (void)
2110 rtl_initialized
= false;
2111 this_target_rtl
->target_specific_initialized
= false;
2113 cgraph_c_finalize ();
2114 cgraphunit_c_finalize ();
2115 dwarf2out_c_finalize ();
2117 ipa_cp_c_finalize ();
2118 ipa_reference_c_finalize ();
2119 params_c_finalize ();