1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* This is the top level of cc1/c++.
21 It parses command args, opens files, invokes the various passes
22 in the proper order, and counts the time used by each.
23 Error messages and low-level interface to malloc also handled here. */
27 #include "coretypes.h"
33 #include "alloc-pool.h"
37 #include "optabs-query.h"
38 #include "optabs-libfuncs.h"
39 #include "insn-config.h"
45 #include "diagnostic.h"
47 #include "fold-const.h"
49 #include "tree-inline.h"
50 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
53 #include "insn-attr.h"
54 #include "insn-flags.h"
64 #include "tree-diagnostic.h"
65 #include "tree-pretty-print.h"
69 #include "dwarf2asm.h"
71 #include "common/common-target.h"
72 #include "langhooks.h"
73 #include "cfgloop.h" /* for init_set_costs */
74 #include "hosthooks.h"
76 #include "opts-diagnostic.h"
77 #include "value-prof.h"
80 #include "internal-fn.h"
83 #include "pass_manager.h"
84 #include "auto-profile.h"
85 #include "dwarf2out.h"
86 #include "ipa-reference.h"
87 #include "symbol-summary.h"
90 #include "tree-chkp.h"
93 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
97 #ifdef SDB_DEBUGGING_INFO
101 #ifdef XCOFF_DEBUGGING_INFO
102 #include "xcoffout.h" /* Needed for external data declarations. */
107 static void general_init (const char *, bool);
108 static void do_compile ();
109 static void process_options (void);
110 static void backend_init (void);
111 static int lang_dependent_init (const char *);
112 static void init_asm_output (const char *);
113 static void finalize (bool);
115 static void crash_signal (int) ATTRIBUTE_NORETURN
;
116 static void compile_file (void);
118 /* True if we don't need a backend (e.g. preprocessing only). */
119 static bool no_backend
;
121 /* Length of line when printing switch values. */
124 /* Decoded options, and number of such options. */
125 struct cl_decoded_option
*save_decoded_options
;
126 unsigned int save_decoded_options_count
;
128 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
129 to optimize in process_options (). */
130 #define AUTODETECT_VALUE 2
132 /* Debug hooks - dependent upon command line options. */
134 const struct gcc_debug_hooks
*debug_hooks
;
136 /* The FUNCTION_DECL for the function currently being compiled,
137 or 0 if between functions. */
138 tree current_function_decl
;
140 /* Set to the FUNC_BEGIN label of the current function, or NULL
142 const char * current_function_func_begin_label
;
144 /* A random sequence of characters, unless overridden by user. */
145 static const char *flag_random_seed
;
147 /* A local time stamp derived from the time of compilation. It will be
148 zero if the system cannot provide a time. It will be -1u, if the
149 user has specified a particular random seed. */
152 /* Random number for this compilation */
153 HOST_WIDE_INT random_seed
;
157 /* When non-NULL, indicates that whenever space is allocated on the
158 stack, the resulting stack pointer must not pass this
159 address---that is, for stacks that grow downward, the stack pointer
160 must always be greater than or equal to this address; for stacks
161 that grow upward, the stack pointer must be less than this address.
162 At present, the rtx may be either a REG or a SYMBOL_REF, although
163 the support provided depends on the backend. */
166 /* True if the user has tagged the function with the 'section'
169 bool user_defined_section_attribute
= false;
171 struct target_flag_state default_target_flag_state
;
172 #if SWITCHABLE_TARGET
173 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
175 #define this_target_flag_state (&default_target_flag_state)
178 /* The user symbol prefix after having resolved same. */
179 const char *user_label_prefix
;
181 /* Output files for assembler code (real compiler output)
182 and debugging dumps. */
186 FILE *stack_usage_file
= NULL
;
188 /* The current working directory of a translation. It's generally the
189 directory from which compilation was initiated, but a preprocessed
190 file may specify the original directory in which it was
193 static const char *src_pwd
;
195 /* Initialize src_pwd with the given string, and return true. If it
196 was already initialized, return false. As a special case, it may
197 be called with a NULL argument to test whether src_pwd has NOT been
201 set_src_pwd (const char *pwd
)
205 if (strcmp (src_pwd
, pwd
) == 0)
211 src_pwd
= xstrdup (pwd
);
215 /* Return the directory from which the translation unit was initiated,
216 in case set_src_pwd() was not called before to assign it a
232 /* Called when the start of a function definition is parsed,
233 this function prints on stderr the name of the function. */
235 announce_function (tree decl
)
239 if (rtl_dump_and_exit
)
240 fprintf (stderr
, "%s ",
241 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
243 fprintf (stderr
, " %s",
244 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
246 pp_needs_newline (global_dc
->printer
) = true;
247 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
251 /* Initialize local_tick with a random number or -1 if
252 flag_random_seed is set. */
255 init_local_tick (void)
257 if (!flag_random_seed
)
259 /* Try urandom first. Time of day is too likely to collide.
260 In case of any error we just use the local tick. */
262 int fd
= open ("/dev/urandom", O_RDONLY
);
265 if (read (fd
, &random_seed
, sizeof (random_seed
))
266 != sizeof (random_seed
))
271 /* Now get the tick anyways */
272 #ifdef HAVE_GETTIMEOFDAY
276 gettimeofday (&tv
, NULL
);
277 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
281 time_t now
= time (NULL
);
283 if (now
!= (time_t)-1)
284 local_tick
= (unsigned) now
;
292 /* Set up a default flag_random_seed and local_tick, unless the user
293 already specified one. Must be called after init_local_tick. */
296 init_random_seed (void)
299 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
302 /* Obtain the random_seed. Unless NOINIT, initialize it if
303 it's not provided in the command line. */
306 get_random_seed (bool noinit
)
308 if (!flag_random_seed
&& !noinit
)
313 /* Modify the random_seed string to VAL. Return its previous
317 set_random_seed (const char *val
)
319 const char *old
= flag_random_seed
;
320 flag_random_seed
= val
;
321 if (flag_random_seed
)
325 /* When the driver passed in a hex number don't crc it again */
326 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
327 if (!(endp
> flag_random_seed
&& *endp
== 0))
328 random_seed
= crc32_string (0, flag_random_seed
);
333 /* Handler for fatal signals, such as SIGSEGV. These are transformed
334 into ICE messages, which is much more user friendly. In case the
335 error printer crashes, reset the signal to prevent infinite recursion. */
338 crash_signal (int signo
)
340 signal (signo
, SIG_DFL
);
342 /* If we crashed while processing an ASM statement, then be a little more
343 graceful. It's most likely the user's fault. */
344 if (this_is_asm_operands
)
346 output_operand_lossage ("unrecoverable error");
347 exit (FATAL_EXIT_CODE
);
350 internal_error ("%s", strsignal (signo
));
353 /* A subroutine of wrapup_global_declarations. We've come to the end of
354 the compilation unit. All deferred variables should be undeferred,
355 and all incomplete decls should be finalized. */
358 wrapup_global_declaration_1 (tree decl
)
360 /* We're not deferring this any longer. Assignment is conditional to
361 avoid needlessly dirtying PCH pages. */
362 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
363 && DECL_DEFER_OUTPUT (decl
) != 0)
364 DECL_DEFER_OUTPUT (decl
) = 0;
366 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
367 lang_hooks
.finish_incomplete_decl (decl
);
370 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
371 needs to be output. Return true if it is output. */
374 wrapup_global_declaration_2 (tree decl
)
376 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
377 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
380 /* Don't write out static consts, unless we still need them.
382 We also keep static consts if not optimizing (for debugging),
383 unless the user specified -fno-keep-static-consts.
384 ??? They might be better written into the debug information.
385 This is possible when using DWARF.
387 A language processor that wants static constants to be always
388 written out (even if it is not used) is responsible for
389 calling rest_of_decl_compilation itself. E.g. the C front-end
390 calls rest_of_decl_compilation from finish_decl.
391 One motivation for this is that is conventional in some
392 environments to write things like:
393 static const char rcsid[] = "... version string ...";
394 intending to force the string to be in the executable.
396 A language processor that would prefer to have unneeded
397 static constants "optimized away" would just defer writing
398 them out until here. E.g. C++ does this, because static
399 constants are often defined in header files.
401 ??? A tempting alternative (for both C and C++) would be
402 to force a constant to be written if and only if it is
403 defined in a main file, as opposed to an include file. */
405 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
409 node
= varpool_node::get (decl
);
411 if (!node
&& flag_ltrans
)
413 else if (node
&& node
->definition
)
415 else if (node
&& node
->alias
)
417 else if (!symtab
->global_info_ready
419 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
421 else if (node
&& node
->analyzed
)
423 else if (DECL_COMDAT (decl
))
425 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
426 && (optimize
|| !flag_keep_static_consts
427 || DECL_ARTIFICIAL (decl
)))
432 rest_of_decl_compilation (decl
, 1, 1);
440 /* Do any final processing required for the declarations in VEC, of
441 which there are LEN. We write out inline functions and variables
442 that have been deferred until this point, but which are required.
443 Returns nonzero if anything was put out. */
446 wrapup_global_declarations (tree
*vec
, int len
)
448 bool reconsider
, output_something
= false;
451 for (i
= 0; i
< len
; i
++)
452 wrapup_global_declaration_1 (vec
[i
]);
454 /* Now emit any global variables or functions that we have been
455 putting off. We need to loop in case one of the things emitted
456 here references another one which comes earlier in the list. */
460 for (i
= 0; i
< len
; i
++)
461 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
463 output_something
= true;
467 return output_something
;
470 /* Compile an entire translation unit. Write a file of assembly
471 output and various debugging dumps. */
476 timevar_start (TV_PHASE_PARSING
);
477 timevar_push (TV_PARSE_GLOBAL
);
479 /* Parse entire file and generate initial debug information. */
480 lang_hooks
.parse_file ();
482 timevar_pop (TV_PARSE_GLOBAL
);
483 timevar_stop (TV_PHASE_PARSING
);
485 if (flag_dump_locations
)
486 dump_location_info (stderr
);
488 /* Compilation is now finished except for writing
489 what's left of the symbol table output. */
491 if (flag_syntax_only
|| flag_wpa
)
494 /* Reset maximum_field_alignment, it can be adjusted by #pragma pack
495 and this shouldn't influence any types built by the middle-end
496 from now on (like gcov_info_type). */
497 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
499 ggc_protect_identifiers
= false;
501 /* Run the actual compilation process. */
504 timevar_start (TV_PHASE_OPT_GEN
);
505 symtab
->finalize_compilation_unit ();
506 timevar_stop (TV_PHASE_OPT_GEN
);
509 /* Perform any post compilation-proper parser cleanups and
510 processing. This is currently only needed for the C++ parser,
511 which can be hopefully cleaned up so this hook is no longer
513 if (lang_hooks
.decls
.post_compilation_parsing_cleanups
)
514 lang_hooks
.decls
.post_compilation_parsing_cleanups ();
519 timevar_start (TV_PHASE_LATE_ASM
);
521 /* Compilation unit is finalized. When producing non-fat LTO object, we are
522 basically finished. */
523 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
525 /* File-scope initialization for AddressSanitizer. */
526 if (flag_sanitize
& SANITIZE_ADDRESS
)
529 if (flag_sanitize
& SANITIZE_THREAD
)
532 if (flag_check_pointer_bounds
)
537 output_shared_constant_pool ();
538 output_object_blocks ();
539 finish_tm_clone_pairs ();
541 /* Write out any pending weak symbol declarations. */
544 /* This must be at the end before unwind and debug info.
545 Some target ports emit PIC setup thunks here. */
546 targetm
.asm_out
.code_end ();
548 /* Do dbx symbols. */
549 timevar_push (TV_SYMOUT
);
551 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
552 if (dwarf2out_do_frame ())
553 dwarf2out_frame_finish ();
556 (*debug_hooks
->finish
) (main_input_filename
);
557 timevar_pop (TV_SYMOUT
);
559 /* Output some stuff at end of file if nec. */
561 dw2_output_indirect_constants ();
563 /* Flush any pending external directives. */
564 process_pending_assemble_externals ();
567 /* Emit LTO marker if LTO info has been previously emitted. This is
568 used by collect2 to determine whether an object file contains IL.
569 We used to emit an undefined reference here, but this produces
570 link errors if an object file with IL is stored into a shared
571 library without invoking lto1. */
572 if (flag_generate_lto
|| flag_generate_offload
)
574 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
575 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
577 (unsigned HOST_WIDE_INT
) 1, 8);
578 #elif defined ASM_OUTPUT_ALIGNED_COMMON
579 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
580 (unsigned HOST_WIDE_INT
) 1, 8);
582 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
583 (unsigned HOST_WIDE_INT
) 1,
584 (unsigned HOST_WIDE_INT
) 1);
588 /* Let linker plugin know that this is a slim object and must be LTOed
589 even when user did not ask for it. */
590 if (flag_generate_lto
&& !flag_fat_lto_objects
)
592 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
593 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
594 (unsigned HOST_WIDE_INT
) 1, 8);
595 #elif defined ASM_OUTPUT_ALIGNED_COMMON
596 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
597 (unsigned HOST_WIDE_INT
) 1, 8);
599 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
600 (unsigned HOST_WIDE_INT
) 1,
601 (unsigned HOST_WIDE_INT
) 1);
605 /* Attach a special .ident directive to the end of the file to identify
606 the version of GCC which compiled this code. The format of the .ident
607 string is patterned after the ones produced by native SVR4 compilers. */
610 const char *pkg_version
= "(GNU) ";
613 if (strcmp ("(GCC) ", pkgversion_string
))
614 pkg_version
= pkgversion_string
;
616 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
617 targetm
.asm_out
.output_ident (ident_str
);
620 /* Auto profile finalization. */
621 if (flag_auto_profile
)
624 /* Invoke registered plugin callbacks. */
625 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
627 /* This must be at the end. Some target ports emit end of file directives
628 into the assembly file here, and hence we can not output anything to the
629 assembly file after this point. */
630 targetm
.asm_out
.file_end ();
632 timevar_stop (TV_PHASE_LATE_ASM
);
635 /* Print version information to FILE.
636 Each line begins with INDENT (for the case where FILE is the
637 assembler output file).
639 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
640 proper and can print pertinent state (e.g. params and plugins).
642 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
643 compiler, and we don't hold the mutex on the compiler's global state:
644 we can't print params and plugins, since they might not be initialized,
645 or might be being manipulated by a compile running in another
649 print_version (FILE *file
, const char *indent
, bool show_global_state
)
651 static const char fmt1
[] =
653 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
655 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
658 static const char fmt2
[] =
659 N_("GMP version %s, MPFR version %s, MPC version %s\n");
660 static const char fmt3
[] =
661 N_("%s%swarning: %s header version %s differs from library version %s.\n");
662 static const char fmt4
[] =
663 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
665 #define __VERSION__ "[?]"
668 file
== stderr
? _(fmt1
) : fmt1
,
669 indent
, *indent
!= 0 ? " " : "",
670 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
671 indent
, __VERSION__
);
673 /* We need to stringify the GMP macro values. Ugh, gmp_version has
674 two string formats, "i.j.k" and "i.j" when k is zero. As of
675 gmp-4.3.0, GMP always uses the 3 number format. */
676 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
677 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
678 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
679 #define GCC_GMP_VERSION \
680 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
681 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
682 #define GCC_GMP_STRINGIFY_VERSION \
683 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
684 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
686 #define GCC_GMP_STRINGIFY_VERSION \
687 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
688 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
689 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
692 file
== stderr
? _(fmt2
) : fmt2
,
693 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
694 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
696 file
== stderr
? _(fmt3
) : fmt3
,
697 indent
, *indent
!= 0 ? " " : "",
698 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
699 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
701 file
== stderr
? _(fmt3
) : fmt3
,
702 indent
, *indent
!= 0 ? " " : "",
703 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
704 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
706 file
== stderr
? _(fmt3
) : fmt3
,
707 indent
, *indent
!= 0 ? " " : "",
708 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
710 if (show_global_state
)
713 file
== stderr
? _(fmt4
) : fmt4
,
714 indent
, *indent
!= 0 ? " " : "",
715 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
717 print_plugins_versions (file
, indent
);
722 print_to_asm_out_file (print_switch_type type
, const char * text
)
724 bool prepend_sep
= true;
728 case SWITCH_TYPE_LINE_END
:
729 putc ('\n', asm_out_file
);
732 case SWITCH_TYPE_LINE_START
:
733 fputs (ASM_COMMENT_START
, asm_out_file
);
734 return strlen (ASM_COMMENT_START
);
736 case SWITCH_TYPE_DESCRIPTIVE
:
737 if (ASM_COMMENT_START
[0] == 0)
740 case SWITCH_TYPE_PASSED
:
741 case SWITCH_TYPE_ENABLED
:
743 fputc (' ', asm_out_file
);
744 fputs (text
, asm_out_file
);
745 /* No need to return the length here as
746 print_single_switch has already done it. */
755 print_to_stderr (print_switch_type type
, const char * text
)
759 case SWITCH_TYPE_LINE_END
:
763 case SWITCH_TYPE_LINE_START
:
766 case SWITCH_TYPE_PASSED
:
767 case SWITCH_TYPE_ENABLED
:
771 case SWITCH_TYPE_DESCRIPTIVE
:
772 fputs (text
, stderr
);
773 /* No need to return the length here as
774 print_single_switch has already done it. */
782 /* Print an option value and return the adjusted position in the line.
783 ??? print_fn doesn't handle errors, eg disk full; presumably other
784 code will catch a disk full though. */
787 print_single_switch (print_switch_fn_type print_fn
,
789 print_switch_type type
,
792 /* The ultrix fprintf returns 0 on success, so compute the result
793 we want here since we need it for the following test. The +1
794 is for the separator character that will probably be emitted. */
795 int len
= strlen (text
) + 1;
798 && pos
+ len
> MAX_LINE
)
800 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
805 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
807 print_fn (type
, text
);
811 /* Print active target switches using PRINT_FN.
812 POS is the current cursor position and MAX is the size of a "line".
813 Each line begins with INDENT and ends with TERM.
814 Each switch is separated from the next by SEP. */
817 print_switch_values (print_switch_fn_type print_fn
)
822 /* Fill in the -frandom-seed option, if the user didn't pass it, so
823 that it can be printed below. This helps reproducibility. */
824 if (!flag_random_seed
)
827 /* Print the options as passed. */
828 pos
= print_single_switch (print_fn
, pos
,
829 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
831 for (j
= 1; j
< save_decoded_options_count
; j
++)
833 switch (save_decoded_options
[j
].opt_index
)
846 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
847 save_decoded_options
[j
].orig_option_with_args_text
);
851 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
853 /* Print the -f and -m options that have been enabled.
854 We don't handle language specific options but printing argv
856 pos
= print_single_switch (print_fn
, 0,
857 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
859 for (j
= 0; j
< cl_options_count
; j
++)
860 if (cl_options
[j
].cl_report
861 && option_enabled (j
, &global_options
) > 0)
862 pos
= print_single_switch (print_fn
, pos
,
863 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
865 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
868 /* Open assembly code output file. Do this even if -fsyntax-only is
869 on, because then the driver will have provided the name of a
870 temporary file or bit bucket for us. NAME is the file specified on
871 the command line, possibly NULL. */
873 init_asm_output (const char *name
)
875 if (name
== NULL
&& asm_file_name
== 0)
876 asm_out_file
= stdout
;
879 if (asm_file_name
== 0)
881 int len
= strlen (dump_base_name
);
882 char *dumpname
= XNEWVEC (char, len
+ 6);
884 memcpy (dumpname
, dump_base_name
, len
+ 1);
885 strip_off_ending (dumpname
, len
);
886 strcat (dumpname
, ".s");
887 asm_file_name
= dumpname
;
889 if (!strcmp (asm_file_name
, "-"))
890 asm_out_file
= stdout
;
891 else if (!canonical_filename_eq (asm_file_name
, name
)
892 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
893 asm_out_file
= fopen (asm_file_name
, "w");
895 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
896 line in the current file. */
897 fatal_error (UNKNOWN_LOCATION
,
898 "input file %qs is the same as output file",
900 if (asm_out_file
== 0)
901 fatal_error (UNKNOWN_LOCATION
,
902 "can%'t open %qs for writing: %m", asm_file_name
);
905 if (!flag_syntax_only
)
907 targetm
.asm_out
.file_start ();
909 if (flag_record_gcc_switches
)
911 if (targetm
.asm_out
.record_gcc_switches
)
913 /* Let the target know that we are about to start recording. */
914 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
916 /* Now record the switches. */
917 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
918 /* Let the target know that the recording is over. */
919 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
923 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
926 if (flag_verbose_asm
)
928 /* Print the list of switches in effect
929 into the assembler file as comments. */
930 print_version (asm_out_file
, ASM_COMMENT_START
, true);
931 print_switch_values (print_to_asm_out_file
);
932 putc ('\n', asm_out_file
);
937 /* A helper function; used as the reallocator function for cpp's line
940 realloc_for_line_map (void *ptr
, size_t len
)
942 return ggc_realloc (ptr
, len
);
945 /* A helper function: used as the allocator function for
946 identifier_to_locale. */
948 alloc_for_identifier_to_locale (size_t len
)
950 return ggc_alloc_atomic (len
);
953 /* Output stack usage information. */
955 output_stack_usage (void)
957 static bool warning_issued
= false;
958 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
959 const char *stack_usage_kind_str
[] = {
964 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
965 enum stack_usage_kind_type stack_usage_kind
;
971 warning (0, "stack usage computation not supported for this target");
972 warning_issued
= true;
977 stack_usage_kind
= STATIC
;
979 /* Add the maximum amount of space pushed onto the stack. */
980 if (current_function_pushed_stack_size
> 0)
982 stack_usage
+= current_function_pushed_stack_size
;
983 stack_usage_kind
= DYNAMIC_BOUNDED
;
986 /* Now on to the tricky part: dynamic stack allocation. */
987 if (current_function_allocates_dynamic_stack_space
)
989 if (current_function_has_unbounded_dynamic_stack_size
)
990 stack_usage_kind
= DYNAMIC
;
992 stack_usage_kind
= DYNAMIC_BOUNDED
;
994 /* Add the size even in the unbounded case, this can't hurt. */
995 stack_usage
+= current_function_dynamic_stack_size
;
998 if (flag_stack_usage
)
1000 expanded_location loc
1001 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1002 /* We don't want to print the full qualified name because it can be long,
1003 so we strip the scope prefix, but we may need to deal with the suffix
1004 created by the compiler. */
1006 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1008 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1011 const char *dot
= strchr (name
, '.');
1012 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1015 dot
= strchr (name
, '.');
1020 const char *dot
= strrchr (name
, '.');
1025 fprintf (stack_usage_file
,
1026 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1027 lbasename (loc
.file
),
1032 stack_usage_kind_str
[stack_usage_kind
]);
1035 if (warn_stack_usage
>= 0)
1037 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1039 if (stack_usage_kind
== DYNAMIC
)
1040 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1041 else if (stack_usage
> warn_stack_usage
)
1043 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1045 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1048 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1054 /* Open an auxiliary output file. */
1056 open_auxiliary_file (const char *ext
)
1061 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1062 file
= fopen (filename
, "w");
1064 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1069 /* Initialization of the front end environment, before command line
1070 options are parsed. Signal handlers, internationalization etc.
1071 ARGV0 is main's argv[0]. */
1073 general_init (const char *argv0
, bool init_signals
)
1077 p
= argv0
+ strlen (argv0
);
1078 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1082 xmalloc_set_program_name (progname
);
1086 /* Unlock the stdio streams. */
1087 unlock_std_streams ();
1089 gcc_init_libintl ();
1091 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1092 identifier_to_locale_free
= ggc_free
;
1094 /* Initialize the diagnostics reporting machinery, so option parsing
1095 can give warnings and errors. */
1096 diagnostic_initialize (global_dc
, N_OPTS
);
1097 /* Set a default printer. Language specific initializations will
1098 override it later. */
1099 tree_diagnostics_defaults (global_dc
);
1101 global_dc
->show_caret
1102 = global_options_init
.x_flag_diagnostics_show_caret
;
1103 global_dc
->show_option_requested
1104 = global_options_init
.x_flag_diagnostics_show_option
;
1105 global_dc
->show_column
1106 = global_options_init
.x_flag_show_column
;
1107 global_dc
->internal_error
= plugins_internal_error_function
;
1108 global_dc
->option_enabled
= option_enabled
;
1109 global_dc
->option_state
= &global_options
;
1110 global_dc
->option_name
= option_name
;
1114 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1116 signal (SIGSEGV
, crash_signal
);
1119 signal (SIGILL
, crash_signal
);
1122 signal (SIGBUS
, crash_signal
);
1125 signal (SIGABRT
, crash_signal
);
1127 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1128 signal (SIGIOT
, crash_signal
);
1131 signal (SIGFPE
, crash_signal
);
1134 /* Other host-specific signal setup. */
1135 (*host_hooks
.extra_signals
)();
1138 /* Initialize the garbage-collector, string pools and tree type hash
1142 input_location
= UNKNOWN_LOCATION
;
1143 line_table
= ggc_alloc
<line_maps
> ();
1144 linemap_init (line_table
, BUILTINS_LOCATION
);
1145 line_table
->reallocator
= realloc_for_line_map
;
1146 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1149 /* Initialize register usage now so switches may override. */
1152 /* Register the language-independent parameters. */
1153 global_init_params ();
1155 /* This must be done after global_init_params but before argument
1157 init_ggc_heuristics ();
1159 /* Create the singleton holder for global state.
1160 Doing so also creates the pass manager and with it the passes. */
1161 g
= new gcc::context ();
1162 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1164 statistics_early_init ();
1168 /* Return true if the current target supports -fsection-anchors. */
1171 target_supports_section_anchors_p (void)
1173 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1176 if (targetm
.asm_out
.output_anchor
== NULL
)
1182 /* Default the align_* variables to 1 if they're still unset, and
1183 set up the align_*_log variables. */
1185 init_alignments (void)
1187 if (align_loops
<= 0)
1189 if (align_loops_max_skip
> align_loops
)
1190 align_loops_max_skip
= align_loops
- 1;
1191 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1192 if (align_jumps
<= 0)
1194 if (align_jumps_max_skip
> align_jumps
)
1195 align_jumps_max_skip
= align_jumps
- 1;
1196 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1197 if (align_labels
<= 0)
1199 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1200 if (align_labels_max_skip
> align_labels
)
1201 align_labels_max_skip
= align_labels
- 1;
1202 if (align_functions
<= 0)
1203 align_functions
= 1;
1204 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1207 /* Process the options that have been parsed. */
1209 process_options (void)
1211 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1212 This can happen with incorrect pre-processed input. */
1213 debug_hooks
= &do_nothing_debug_hooks
;
1215 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1217 /* Allow the front end to perform consistency checks and do further
1218 initialization based on the command line options. This hook also
1219 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1220 so we can correctly initialize debug output. */
1221 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1223 /* Some machines may reject certain combinations of options. */
1224 targetm
.target_option
.override ();
1226 /* Avoid any informative notes in the second run of -fcompare-debug. */
1227 if (flag_compare_debug
)
1228 diagnostic_inhibit_notes (global_dc
);
1230 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1232 warning (OPT_fsection_anchors
,
1233 "this target does not support %qs", "-fsection-anchors");
1234 flag_section_anchors
= 0;
1237 if (flag_short_enums
== 2)
1238 flag_short_enums
= targetm
.default_short_enums ();
1240 /* Set aux_base_name if not already set. */
1243 else if (main_input_filename
)
1245 char *name
= xstrdup (lbasename (main_input_filename
));
1247 strip_off_ending (name
, strlen (name
));
1248 aux_base_name
= name
;
1251 aux_base_name
= "gccaux";
1255 || flag_loop_optimize_isl
1256 || flag_graphite_identity
1257 || flag_loop_parallelize_all
)
1258 sorry ("Graphite loop optimizations cannot be used (ISL is not available)"
1259 "(-fgraphite, -fgraphite-identity, -floop-block, "
1260 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1261 "-floop-unroll-and-jam, and -ftree-loop-linear)");
1264 if (flag_check_pointer_bounds
)
1266 if (targetm
.chkp_bound_mode () == VOIDmode
)
1268 error ("-fcheck-pointer-bounds is not supported for this target");
1269 flag_check_pointer_bounds
= 0;
1272 if (flag_sanitize
& SANITIZE_ADDRESS
)
1274 error ("-fcheck-pointer-bounds is not supported with "
1275 "Address Sanitizer");
1276 flag_check_pointer_bounds
= 0;
1280 /* One region RA really helps to decrease the code size. */
1281 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1283 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1285 if (!abi_version_at_least (2))
1287 /* -fabi-version=1 support was removed after GCC 4.9. */
1288 error ("%<-fabi-version=1%> is no longer supported");
1289 flag_abi_version
= 2;
1292 /* Unrolling all loops implies that standard loop unrolling must also
1294 if (flag_unroll_all_loops
)
1295 flag_unroll_loops
= 1;
1297 /* web and rename-registers help when run after loop unrolling. */
1298 if (flag_web
== AUTODETECT_VALUE
)
1299 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1301 if (flag_rename_registers
== AUTODETECT_VALUE
)
1302 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1304 if (flag_non_call_exceptions
)
1305 flag_asynchronous_unwind_tables
= 1;
1306 if (flag_asynchronous_unwind_tables
)
1307 flag_unwind_tables
= 1;
1309 if (flag_value_profile_transformations
)
1310 flag_profile_values
= 1;
1312 /* Warn about options that are not supported on this machine. */
1313 #ifndef INSN_SCHEDULING
1314 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1315 warning (0, "instruction scheduling not supported on this target machine");
1317 if (!DELAY_SLOTS
&& flag_delayed_branch
)
1318 warning (0, "this target machine does not have delayed branches");
1320 user_label_prefix
= USER_LABEL_PREFIX
;
1321 if (flag_leading_underscore
!= -1)
1323 /* If the default prefix is more complicated than "" or "_",
1324 issue a warning and ignore this option. */
1325 if (user_label_prefix
[0] == 0 ||
1326 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1328 user_label_prefix
= flag_leading_underscore
? "_" : "";
1331 warning (0, "-f%sleading-underscore not supported on this target machine",
1332 flag_leading_underscore
? "" : "no-");
1335 /* If we are in verbose mode, write out the version and maybe all the
1336 option flags in use. */
1339 print_version (stderr
, "", true);
1341 print_switch_values (print_to_stderr
);
1344 if (flag_syntax_only
)
1346 write_symbols
= NO_DEBUG
;
1352 if (debug_info_level
== DINFO_LEVEL_NONE
)
1354 debug_info_level
= DINFO_LEVEL_NORMAL
;
1356 if (write_symbols
== NO_DEBUG
)
1357 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1360 debug_info_level
= DINFO_LEVEL_NONE
;
1363 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1365 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1368 error ("could not open final insn dump file %qs: %m",
1369 flag_dump_final_insns
);
1370 flag_dump_final_insns
= NULL
;
1372 else if (fclose (final_output
))
1374 error ("could not close zeroed insn dump file %qs: %m",
1375 flag_dump_final_insns
);
1376 flag_dump_final_insns
= NULL
;
1380 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1382 if (debug_info_level
== DINFO_LEVEL_NONE
)
1383 write_symbols
= NO_DEBUG
;
1385 if (write_symbols
== NO_DEBUG
)
1387 #if defined(DBX_DEBUGGING_INFO)
1388 else if (write_symbols
== DBX_DEBUG
)
1389 debug_hooks
= &dbx_debug_hooks
;
1391 #if defined(XCOFF_DEBUGGING_INFO)
1392 else if (write_symbols
== XCOFF_DEBUG
)
1393 debug_hooks
= &xcoff_debug_hooks
;
1395 #ifdef SDB_DEBUGGING_INFO
1396 else if (write_symbols
== SDB_DEBUG
)
1397 debug_hooks
= &sdb_debug_hooks
;
1399 #ifdef DWARF2_DEBUGGING_INFO
1400 else if (write_symbols
== DWARF2_DEBUG
)
1401 debug_hooks
= &dwarf2_debug_hooks
;
1403 #ifdef VMS_DEBUGGING_INFO
1404 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1405 debug_hooks
= &vmsdbg_debug_hooks
;
1407 #ifdef DWARF2_LINENO_DEBUGGING_INFO
1408 else if (write_symbols
== DWARF2_DEBUG
)
1409 debug_hooks
= &dwarf2_lineno_debug_hooks
;
1412 error ("target system does not support the %qs debug format",
1413 debug_type_names
[write_symbols
]);
1415 /* We know which debug output will be used so we can set flag_var_tracking
1416 and flag_var_tracking_uninit if the user has not specified them. */
1417 if (debug_info_level
< DINFO_LEVEL_NORMAL
1418 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1420 if (flag_var_tracking
== 1
1421 || flag_var_tracking_uninit
== 1)
1423 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1424 warning (0, "variable tracking requested, but useless unless "
1425 "producing debug info");
1427 warning (0, "variable tracking requested, but not supported "
1428 "by this debug format");
1430 flag_var_tracking
= 0;
1431 flag_var_tracking_uninit
= 0;
1434 /* The debug hooks are used to implement -fdump-go-spec because it
1435 gives a simple and stable API for all the information we need to
1437 if (flag_dump_go_spec
!= NULL
)
1438 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1440 /* If the user specifically requested variable tracking with tagging
1441 uninitialized variables, we need to turn on variable tracking.
1442 (We already determined above that variable tracking is feasible.) */
1443 if (flag_var_tracking_uninit
== 1)
1444 flag_var_tracking
= 1;
1446 if (flag_var_tracking
== AUTODETECT_VALUE
)
1447 flag_var_tracking
= optimize
>= 1;
1449 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1450 flag_var_tracking_uninit
= flag_var_tracking
;
1452 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1453 flag_var_tracking_assignments
= flag_var_tracking
1454 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1456 if (flag_var_tracking_assignments_toggle
)
1457 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1459 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1460 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1462 if (flag_var_tracking_assignments
1463 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1464 warning (0, "var-tracking-assignments changes selective scheduling");
1466 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1468 if (HAVE_conditional_move
)
1469 flag_tree_cselim
= 1;
1471 flag_tree_cselim
= 0;
1474 /* If auxiliary info generation is desired, open the output file.
1475 This goes in the same directory as the source file--unlike
1476 all the other output files. */
1477 if (flag_gen_aux_info
)
1479 aux_info_file
= fopen (aux_info_file_name
, "w");
1480 if (aux_info_file
== 0)
1481 fatal_error (input_location
, "can%'t open %s: %m", aux_info_file_name
);
1484 if (!targetm_common
.have_named_sections
)
1486 if (flag_function_sections
)
1488 warning (0, "-ffunction-sections not supported for this target");
1489 flag_function_sections
= 0;
1491 if (flag_data_sections
)
1493 warning (0, "-fdata-sections not supported for this target");
1494 flag_data_sections
= 0;
1498 if (flag_prefetch_loop_arrays
> 0 && !targetm
.code_for_prefetch
)
1500 warning (0, "-fprefetch-loop-arrays not supported for this target");
1501 flag_prefetch_loop_arrays
= 0;
1503 else if (flag_prefetch_loop_arrays
> 0 && !targetm
.have_prefetch ())
1505 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1506 flag_prefetch_loop_arrays
= 0;
1509 /* This combination of options isn't handled for i386 targets and doesn't
1510 make much sense anyway, so don't allow it. */
1511 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1513 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1514 flag_prefetch_loop_arrays
= 0;
1517 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1518 if (flag_signaling_nans
)
1519 flag_trapping_math
= 1;
1521 /* We cannot reassociate if we want traps or signed zeros. */
1522 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1524 warning (0, "-fassociative-math disabled; other options take precedence");
1525 flag_associative_math
= 0;
1528 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1529 if (flag_cx_limited_range
)
1530 flag_complex_method
= 0;
1532 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1533 if (flag_cx_fortran_rules
)
1534 flag_complex_method
= 1;
1536 /* Targets must be able to place spill slots at lower addresses. If the
1537 target already uses a soft frame pointer, the transition is trivial. */
1538 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1540 warning (0, "-fstack-protector not supported for this target");
1541 flag_stack_protect
= 0;
1543 if (!flag_stack_protect
)
1544 warn_stack_protect
= 0;
1546 /* Address Sanitizer needs porting to each target architecture. */
1548 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1549 && !FRAME_GROWS_DOWNWARD
)
1552 "-fsanitize=address and -fsanitize=kernel-address "
1553 "are not supported for this target");
1554 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1557 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1558 && targetm
.asan_shadow_offset
== NULL
)
1560 warning (0, "-fsanitize=address not supported for this target");
1561 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1564 /* Do not use IPA optimizations for register allocation if profiler is active
1565 or port does not emit prologue and epilogue as RTL. */
1566 if (profile_flag
|| !targetm
.have_prologue () || !targetm
.have_epilogue ())
1569 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1570 have not been set. */
1571 if (!global_options_set
.x_warnings_are_errors
1572 && warn_coverage_mismatch
1573 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1575 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1576 DK_ERROR
, UNKNOWN_LOCATION
);
1578 /* Save the current optimization options. */
1579 optimization_default_node
= build_optimization_node (&global_options
);
1580 optimization_current_node
= optimization_default_node
;
1582 /* Please don't change global_options after this point, those changes won't
1583 be reflected in optimization_{default,current}_node. */
1586 /* This function can be called multiple times to reinitialize the compiler
1587 back end when register classes or instruction sets have changed,
1588 before each function. */
1590 backend_init_target (void)
1592 /* Initialize alignment variables. */
1595 /* This depends on stack_pointer_rtx. */
1596 init_fake_stack_mems ();
1598 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1600 init_alias_target ();
1602 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1605 /* Depends on the enabled attribute. */
1608 /* The following initialization functions need to generate rtl, so
1609 provide a dummy function context for them. */
1610 init_dummy_function_start ();
1612 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1613 on a mode change. */
1615 init_lower_subreg ();
1618 init_expr_target ();
1621 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1622 after a mode change as well. */
1623 caller_save_initialized_p
= false;
1625 expand_dummy_function_end ();
1628 /* Initialize the compiler back end. This function is called only once,
1629 when starting the compiler. */
1636 init_inline_once ();
1637 init_varasm_once ();
1638 save_register_info ();
1640 /* Middle end needs this initialization for default mem attributes
1641 used by early calls to make_decl_rtl. */
1644 /* Middle end needs this initialization for mode tables used to assign
1645 modes to vector variables. */
1649 /* Initialize excess precision settings. */
1651 init_excess_precision (void)
1653 /* Adjust excess precision handling based on the target options. If
1654 the front end cannot handle it, flag_excess_precision_cmdline
1655 will already have been set accordingly in the post_options
1657 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1658 flag_excess_precision
= flag_excess_precision_cmdline
;
1659 if (flag_unsafe_math_optimizations
)
1660 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1661 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1663 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1664 switch (flt_eval_method
)
1668 /* Either the target acts unpredictably (-1) or has all the
1669 operations required not to have excess precision (0). */
1670 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1674 /* In these cases, predictable excess precision makes
1678 /* Any other implementation-defined FLT_EVAL_METHOD values
1679 require the compiler to handle the associated excess
1680 precision rules in excess_precision_type. */
1686 /* Initialize things that are both lang-dependent and target-dependent.
1687 This function can be called more than once if target parameters change. */
1689 lang_dependent_init_target (void)
1691 /* This determines excess precision settings. */
1692 init_excess_precision ();
1694 /* This creates various _DECL nodes, so needs to be called after the
1695 front end is initialized. It also depends on the HAVE_xxx macros
1696 generated from the target machine description. */
1699 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1702 /* Perform initializations that are lang-dependent or target-dependent.
1703 but matters only for late optimizations and RTL generation. */
1705 static int rtl_initialized
;
1708 initialize_rtl (void)
1710 auto_timevar
tv (g_timer
, TV_INITIALIZE_RTL
);
1712 /* Initialization done just once per compilation, but delayed
1713 till code generation. */
1714 if (!rtl_initialized
)
1716 rtl_initialized
= true;
1718 /* Target specific RTL backend initialization. */
1719 if (!this_target_rtl
->target_specific_initialized
)
1721 backend_init_target ();
1722 this_target_rtl
->target_specific_initialized
= true;
1726 /* Language-dependent initialization. Returns nonzero on success. */
1728 lang_dependent_init (const char *name
)
1730 location_t save_loc
= input_location
;
1731 if (dump_base_name
== 0)
1732 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1734 /* Other front-end initialization. */
1735 input_location
= BUILTINS_LOCATION
;
1736 if (lang_hooks
.init () == 0)
1738 input_location
= save_loc
;
1742 init_asm_output (name
);
1744 /* If stack usage information is desired, open the output file. */
1745 if (flag_stack_usage
)
1746 stack_usage_file
= open_auxiliary_file ("su");
1749 /* This creates various _DECL nodes, so needs to be called after the
1750 front end is initialized. */
1753 /* Do the target-specific parts of the initialization. */
1754 lang_dependent_init_target ();
1758 /* If dbx symbol table desired, initialize writing it and output the
1759 predefined types. */
1760 timevar_push (TV_SYMOUT
);
1762 /* Now we have the correct original filename, we can initialize
1764 (*debug_hooks
->init
) (name
);
1766 timevar_pop (TV_SYMOUT
);
1773 /* Reinitialize everything when target parameters, such as register usage,
1776 target_reinit (void)
1778 struct rtl_data saved_x_rtl
;
1779 rtx
*saved_regno_reg_rtx
;
1780 tree saved_optimization_current_node
;
1781 struct target_optabs
*saved_this_fn_optabs
;
1783 /* Temporarily switch to the default optimization node, so that
1784 *this_target_optabs is set to the default, not reflecting
1785 whatever a previous function used for the optimize
1787 saved_optimization_current_node
= optimization_current_node
;
1788 saved_this_fn_optabs
= this_fn_optabs
;
1789 if (saved_optimization_current_node
!= optimization_default_node
)
1791 optimization_current_node
= optimization_default_node
;
1792 cl_optimization_restore
1794 TREE_OPTIMIZATION (optimization_default_node
));
1796 this_fn_optabs
= this_target_optabs
;
1798 /* Save *crtl and regno_reg_rtx around the reinitialization
1799 to allow target_reinit being called even after prepare_function_start. */
1800 saved_regno_reg_rtx
= regno_reg_rtx
;
1801 if (saved_regno_reg_rtx
)
1803 saved_x_rtl
= *crtl
;
1804 memset (crtl
, '\0', sizeof (*crtl
));
1805 regno_reg_rtx
= NULL
;
1808 this_target_rtl
->target_specific_initialized
= false;
1810 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1811 to initialize reg_raw_mode[]. */
1814 /* This invokes target hooks to set fixed_reg[] etc, which is
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_hash_table_loc_statistics ();
1852 dump_vec_loc_statistics ();
1853 dump_ggc_loc_statistics (final
);
1854 dump_alias_stats (stderr
);
1855 dump_pta_stats (stderr
);
1858 /* Clean up: close opened files, etc. */
1861 finalize (bool no_backend
)
1863 /* Close the dump files. */
1864 if (flag_gen_aux_info
)
1866 fclose (aux_info_file
);
1868 unlink (aux_info_file_name
);
1871 /* Close non-debugging input and output files. Take special care to note
1872 whether fclose returns an error, since the pages might still be on the
1873 buffer chain while the file is open. */
1877 if (ferror (asm_out_file
) != 0)
1878 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
1879 if (fclose (asm_out_file
) != 0)
1880 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
1883 if (stack_usage_file
)
1884 fclose (stack_usage_file
);
1890 g
->get_passes ()->finish_optimization_passes ();
1896 dump_memory_report (true);
1899 dump_profile_report ();
1901 /* Language-specific end of compilation actions. */
1902 lang_hooks
.finish ();
1906 standard_type_bitsize (int bitsize
)
1908 /* As a special exception, we always want __int128 enabled if possible. */
1911 if (bitsize
== CHAR_TYPE_SIZE
1912 || bitsize
== SHORT_TYPE_SIZE
1913 || bitsize
== INT_TYPE_SIZE
1914 || bitsize
== LONG_TYPE_SIZE
1915 || bitsize
== LONG_LONG_TYPE_SIZE
)
1920 /* Initialize the compiler, and compile the input file. */
1926 /* Don't do any more if an error has already occurred. */
1931 timevar_start (TV_PHASE_SETUP
);
1933 /* This must be run always, because it is needed to compute the FP
1934 predefined macros, such as __LDBL_MAX__, for targets using non
1935 default FP formats. */
1936 init_adjust_machine_modes ();
1937 init_derived_machine_modes ();
1939 /* This must happen after the backend has a chance to process
1940 command line options, but before the parsers are
1942 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
1943 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
1944 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
1945 int_n_enabled_p
[i
] = true;
1947 int_n_enabled_p
[i
] = false;
1949 /* Set up the back-end if requested. */
1953 /* Language-dependent initialization. Returns true on success. */
1954 if (lang_dependent_init (main_input_filename
))
1956 /* Initialize yet another pass. */
1958 ggc_protect_identifiers
= true;
1960 symtab
->initialize ();
1961 init_final (main_input_filename
);
1962 coverage_init (aux_base_name
);
1964 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
1966 timevar_stop (TV_PHASE_SETUP
);
1972 timevar_stop (TV_PHASE_SETUP
);
1975 timevar_start (TV_PHASE_FINALIZE
);
1977 finalize (no_backend
);
1979 timevar_stop (TV_PHASE_FINALIZE
);
1983 toplev::toplev (timer
*external_timer
,
1985 : m_use_TV_TOTAL (external_timer
== NULL
),
1986 m_init_signals (init_signals
)
1989 g_timer
= external_timer
;
1994 if (g_timer
&& m_use_TV_TOTAL
)
1996 g_timer
->stop (TV_TOTAL
);
1997 g_timer
->print (stderr
);
2003 /* Potentially call timevar_init (which will create g_timevars if it
2004 doesn't already exist). */
2007 toplev::start_timevars ()
2009 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2012 timevar_start (TV_TOTAL
);
2015 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2016 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2017 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2019 It is not safe to call this function more than once. */
2022 toplev::main (int argc
, char **argv
)
2024 /* Parsing and gimplification sometimes need quite large stack.
2025 Increase stack size limits if possible. */
2026 stack_limit_increase (64 * 1024 * 1024);
2028 expandargv (&argc
, &argv
);
2030 /* Initialization of GCC's environment, and diagnostics. */
2031 general_init (argv
[0], m_init_signals
);
2033 /* One-off initialization of options that does not need to be
2034 repeated when options are added for particular functions. */
2035 init_options_once ();
2037 /* Initialize global options structures; this must be repeated for
2038 each structure used for parsing options. */
2039 init_options_struct (&global_options
, &global_options_set
);
2040 lang_hooks
.init_options_struct (&global_options
);
2042 /* Convert the options to an array. */
2043 decode_cmdline_options_to_array_default_mask (argc
,
2044 CONST_CAST2 (const char **,
2046 &save_decoded_options
,
2047 &save_decoded_options_count
);
2049 /* Perform language-specific options initialization. */
2050 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2052 /* Parse the options and do minimal processing; basically just
2053 enough to default flags appropriately. */
2054 decode_options (&global_options
, &global_options_set
,
2055 save_decoded_options
, save_decoded_options_count
,
2056 UNKNOWN_LOCATION
, global_dc
);
2058 handle_common_deferred_options ();
2062 initialize_plugins ();
2065 print_version (stderr
, "", true);
2068 print_plugins_help (stderr
, "");
2070 /* Exit early if we can (e.g. -help). */
2071 if (!exit_after_options
)
2078 if (warningcount
|| errorcount
|| werrorcount
)
2079 print_ignored_options ();
2081 /* Invoke registered plugin callbacks if any. Some plugins could
2082 emit some diagnostics here. */
2083 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2085 diagnostic_finish (global_dc
);
2087 finalize_plugins ();
2088 location_adhoc_data_fini (line_table
);
2089 if (seen_error () || werrorcount
)
2090 return (FATAL_EXIT_CODE
);
2092 return (SUCCESS_EXIT_CODE
);
2095 /* For those that want to, this function aims to clean up enough state that
2096 you can call toplev::main again. */
2098 toplev::finalize (void)
2100 rtl_initialized
= false;
2101 this_target_rtl
->target_specific_initialized
= false;
2103 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2104 ipa_reference_c_finalize ();
2106 cgraph_c_finalize ();
2107 cgraphunit_c_finalize ();
2108 dwarf2out_c_finalize ();
2110 ipa_cp_c_finalize ();
2111 ira_costs_c_finalize ();
2112 params_c_finalize ();
2114 finalize_options_struct (&global_options
);
2115 finalize_options_struct (&global_options_set
);
2117 XDELETEVEC (save_decoded_options
);
2119 /* Clean up the context (and pass_manager etc). */
2123 obstack_free (&opts_obstack
, NULL
);