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"
72 #include "opts-diagnostic.h"
74 #include "value-prof.h"
75 #include "alloc-pool.h"
78 #include "tree-ssa-alias.h"
79 #include "internal-fn.h"
80 #include "gimple-expr.h"
83 #include "diagnostic-color.h"
85 #include "pass_manager.h"
86 #include "dwarf2out.h"
87 #include "ipa-reference.h"
92 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
96 #ifdef SDB_DEBUGGING_INFO
100 #ifdef XCOFF_DEBUGGING_INFO
101 #include "xcoffout.h" /* Needed for external data
102 declarations for e.g. AIX 4.x. */
107 static void general_init (const char *);
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 read (fd
, &random_seed
, sizeof (random_seed
));
269 /* Now get the tick anyways */
270 #ifdef HAVE_GETTIMEOFDAY
274 gettimeofday (&tv
, NULL
);
275 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
279 time_t now
= time (NULL
);
281 if (now
!= (time_t)-1)
282 local_tick
= (unsigned) now
;
290 /* Set up a default flag_random_seed and local_tick, unless the user
291 already specified one. Must be called after init_local_tick. */
294 init_random_seed (void)
297 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
300 /* Obtain the random_seed. Unless NOINIT, initialize it if
301 it's not provided in the command line. */
304 get_random_seed (bool noinit
)
306 if (!flag_random_seed
&& !noinit
)
311 /* Modify the random_seed string to VAL. Return its previous
315 set_random_seed (const char *val
)
317 const char *old
= flag_random_seed
;
318 flag_random_seed
= val
;
319 if (flag_random_seed
)
323 /* When the driver passed in a hex number don't crc it again */
324 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
325 if (!(endp
> flag_random_seed
&& *endp
== 0))
326 random_seed
= crc32_string (0, flag_random_seed
);
331 /* Handler for fatal signals, such as SIGSEGV. These are transformed
332 into ICE messages, which is much more user friendly. In case the
333 error printer crashes, reset the signal to prevent infinite recursion. */
336 crash_signal (int signo
)
338 signal (signo
, SIG_DFL
);
340 /* If we crashed while processing an ASM statement, then be a little more
341 graceful. It's most likely the user's fault. */
342 if (this_is_asm_operands
)
344 output_operand_lossage ("unrecoverable error");
345 exit (FATAL_EXIT_CODE
);
348 internal_error ("%s", strsignal (signo
));
351 /* A subroutine of wrapup_global_declarations. We've come to the end of
352 the compilation unit. All deferred variables should be undeferred,
353 and all incomplete decls should be finalized. */
356 wrapup_global_declaration_1 (tree decl
)
358 /* We're not deferring this any longer. Assignment is conditional to
359 avoid needlessly dirtying PCH pages. */
360 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
361 && DECL_DEFER_OUTPUT (decl
) != 0)
362 DECL_DEFER_OUTPUT (decl
) = 0;
364 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
365 lang_hooks
.finish_incomplete_decl (decl
);
368 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
369 needs to be output. Return true if it is output. */
372 wrapup_global_declaration_2 (tree decl
)
374 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
375 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
378 /* Don't write out static consts, unless we still need them.
380 We also keep static consts if not optimizing (for debugging),
381 unless the user specified -fno-keep-static-consts.
382 ??? They might be better written into the debug information.
383 This is possible when using DWARF.
385 A language processor that wants static constants to be always
386 written out (even if it is not used) is responsible for
387 calling rest_of_decl_compilation itself. E.g. the C front-end
388 calls rest_of_decl_compilation from finish_decl.
389 One motivation for this is that is conventional in some
390 environments to write things like:
391 static const char rcsid[] = "... version string ...";
392 intending to force the string to be in the executable.
394 A language processor that would prefer to have unneeded
395 static constants "optimized away" would just defer writing
396 them out until here. E.g. C++ does this, because static
397 constants are often defined in header files.
399 ??? A tempting alternative (for both C and C++) would be
400 to force a constant to be written if and only if it is
401 defined in a main file, as opposed to an include file. */
403 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
407 node
= varpool_node::get (decl
);
409 if (!node
&& flag_ltrans
)
411 else if (node
&& node
->definition
)
413 else if (node
&& node
->alias
)
415 else if (!symtab
->global_info_ready
417 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
419 else if (node
&& node
->analyzed
)
421 else if (DECL_COMDAT (decl
))
423 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
424 && (optimize
|| !flag_keep_static_consts
425 || DECL_ARTIFICIAL (decl
)))
430 rest_of_decl_compilation (decl
, 1, 1);
438 /* Do any final processing required for the declarations in VEC, of
439 which there are LEN. We write out inline functions and variables
440 that have been deferred until this point, but which are required.
441 Returns nonzero if anything was put out. */
444 wrapup_global_declarations (tree
*vec
, int len
)
446 bool reconsider
, output_something
= false;
449 for (i
= 0; i
< len
; i
++)
450 wrapup_global_declaration_1 (vec
[i
]);
452 /* Now emit any global variables or functions that we have been
453 putting off. We need to loop in case one of the things emitted
454 here references another one which comes earlier in the list. */
458 for (i
= 0; i
< len
; i
++)
459 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
461 output_something
= true;
465 return output_something
;
468 /* A subroutine of check_global_declarations. Issue appropriate warnings
469 for the global declaration DECL. */
472 check_global_declaration_1 (tree decl
)
474 /* Warn about any function declared static but not defined. We don't
475 warn about variables, because many programs have static variables
476 that exist only to get some text into the object file. */
477 if (TREE_CODE (decl
) == FUNCTION_DECL
478 && DECL_INITIAL (decl
) == 0
479 && DECL_EXTERNAL (decl
)
480 && ! DECL_ARTIFICIAL (decl
)
481 && ! TREE_NO_WARNING (decl
)
482 && ! TREE_PUBLIC (decl
)
483 && (warn_unused_function
484 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
486 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
487 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
489 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
490 /* This symbol is effectively an "extern" declaration now. */
491 TREE_PUBLIC (decl
) = 1;
494 /* Warn about static fns or vars defined but not used. */
495 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
496 /* We don't warn about "static const" variables because the
497 "rcs_id" idiom uses that construction. */
498 || (warn_unused_variable
499 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
500 && ! DECL_IN_SYSTEM_HEADER (decl
)
501 && ! TREE_USED (decl
)
502 /* The TREE_USED bit for file-scope decls is kept in the identifier,
503 to handle multiple external decls in different scopes. */
504 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
505 && ! DECL_EXTERNAL (decl
)
506 && ! TREE_PUBLIC (decl
)
507 /* A volatile variable might be used in some non-obvious way. */
508 && ! TREE_THIS_VOLATILE (decl
)
509 /* Global register variables must be declared to reserve them. */
510 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
511 /* Otherwise, ask the language. */
512 && lang_hooks
.decls
.warn_unused_global (decl
))
513 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
514 ? OPT_Wunused_function
515 : OPT_Wunused_variable
,
516 "%q+D defined but not used", decl
);
519 /* Issue appropriate warnings for the global declarations in V (of
520 which there are LEN). */
523 check_global_declarations (tree
*v
, int len
)
527 for (i
= 0; i
< len
; i
++)
528 check_global_declaration_1 (v
[i
]);
531 /* Emit debugging information for all global declarations in VEC. */
534 emit_debug_global_declarations (tree
*vec
, int len
)
538 /* Avoid confusing the debug information machinery when there are errors. */
542 timevar_push (TV_SYMOUT
);
543 for (i
= 0; i
< len
; i
++)
544 debug_hooks
->global_decl (vec
[i
]);
545 timevar_pop (TV_SYMOUT
);
548 /* Compile an entire translation unit. Write a file of assembly
549 output and various debugging dumps. */
554 timevar_start (TV_PHASE_PARSING
);
555 timevar_push (TV_PARSE_GLOBAL
);
557 /* Call the parser, which parses the entire file (calling
558 rest_of_compilation for each function). */
559 lang_hooks
.parse_file ();
561 timevar_pop (TV_PARSE_GLOBAL
);
562 timevar_stop (TV_PHASE_PARSING
);
564 /* Compilation is now finished except for writing
565 what's left of the symbol table output. */
567 if (flag_syntax_only
|| flag_wpa
)
570 ggc_protect_identifiers
= false;
572 /* This must also call finalize_compilation_unit. */
573 lang_hooks
.decls
.final_write_globals ();
578 timevar_start (TV_PHASE_LATE_ASM
);
580 /* Compilation unit is finalized. When producing non-fat LTO object, we are
581 basically finished. */
582 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
584 /* File-scope initialization for AddressSanitizer. */
585 if (flag_sanitize
& SANITIZE_ADDRESS
)
588 if (flag_sanitize
& SANITIZE_THREAD
)
591 output_shared_constant_pool ();
592 output_object_blocks ();
593 finish_tm_clone_pairs ();
595 /* Write out any pending weak symbol declarations. */
598 /* This must be at the end before unwind and debug info.
599 Some target ports emit PIC setup thunks here. */
600 targetm
.asm_out
.code_end ();
602 /* Do dbx symbols. */
603 timevar_push (TV_SYMOUT
);
605 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
606 if (dwarf2out_do_frame ())
607 dwarf2out_frame_finish ();
610 (*debug_hooks
->finish
) (main_input_filename
);
611 timevar_pop (TV_SYMOUT
);
613 /* Output some stuff at end of file if nec. */
615 dw2_output_indirect_constants ();
617 /* Flush any pending external directives. */
618 process_pending_assemble_externals ();
621 /* Emit LTO marker if LTO info has been previously emitted. This is
622 used by collect2 to determine whether an object file contains IL.
623 We used to emit an undefined reference here, but this produces
624 link errors if an object file with IL is stored into a shared
625 library without invoking lto1. */
626 if (flag_generate_lto
)
628 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
629 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
631 (unsigned HOST_WIDE_INT
) 1, 8);
632 #elif defined ASM_OUTPUT_ALIGNED_COMMON
633 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
634 (unsigned HOST_WIDE_INT
) 1, 8);
636 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
637 (unsigned HOST_WIDE_INT
) 1,
638 (unsigned HOST_WIDE_INT
) 1);
640 /* Let linker plugin know that this is a slim object and must be LTOed
641 even when user did not ask for it. */
642 if (!flag_fat_lto_objects
)
644 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
645 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
647 (unsigned HOST_WIDE_INT
) 1, 8);
648 #elif defined ASM_OUTPUT_ALIGNED_COMMON
649 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
650 (unsigned HOST_WIDE_INT
) 1, 8);
652 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
653 (unsigned HOST_WIDE_INT
) 1,
654 (unsigned HOST_WIDE_INT
) 1);
659 /* Attach a special .ident directive to the end of the file to identify
660 the version of GCC which compiled this code. The format of the .ident
661 string is patterned after the ones produced by native SVR4 compilers. */
664 const char *pkg_version
= "(GNU) ";
667 if (strcmp ("(GCC) ", pkgversion_string
))
668 pkg_version
= pkgversion_string
;
670 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
671 targetm
.asm_out
.output_ident (ident_str
);
674 /* Invoke registered plugin callbacks. */
675 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
677 /* This must be at the end. Some target ports emit end of file directives
678 into the assembly file here, and hence we can not output anything to the
679 assembly file after this point. */
680 targetm
.asm_out
.file_end ();
682 timevar_stop (TV_PHASE_LATE_ASM
);
685 /* Print version information to FILE.
686 Each line begins with INDENT (for the case where FILE is the
687 assembler output file). */
690 print_version (FILE *file
, const char *indent
)
692 static const char fmt1
[] =
694 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
696 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
699 static const char fmt2
[] =
700 N_("GMP version %s, MPFR version %s, MPC version %s\n");
701 static const char fmt3
[] =
702 N_("%s%swarning: %s header version %s differs from library version %s.\n");
703 static const char fmt4
[] =
704 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
706 #define __VERSION__ "[?]"
709 file
== stderr
? _(fmt1
) : fmt1
,
710 indent
, *indent
!= 0 ? " " : "",
711 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
712 indent
, __VERSION__
);
714 /* We need to stringify the GMP macro values. Ugh, gmp_version has
715 two string formats, "i.j.k" and "i.j" when k is zero. As of
716 gmp-4.3.0, GMP always uses the 3 number format. */
717 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
718 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
719 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
720 #define GCC_GMP_VERSION \
721 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
722 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
723 #define GCC_GMP_STRINGIFY_VERSION \
724 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
725 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
727 #define GCC_GMP_STRINGIFY_VERSION \
728 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
729 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
730 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
733 file
== stderr
? _(fmt2
) : fmt2
,
734 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
735 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
737 file
== stderr
? _(fmt3
) : fmt3
,
738 indent
, *indent
!= 0 ? " " : "",
739 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
740 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
742 file
== stderr
? _(fmt3
) : fmt3
,
743 indent
, *indent
!= 0 ? " " : "",
744 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
745 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
747 file
== stderr
? _(fmt3
) : fmt3
,
748 indent
, *indent
!= 0 ? " " : "",
749 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
751 file
== stderr
? _(fmt4
) : fmt4
,
752 indent
, *indent
!= 0 ? " " : "",
753 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
755 print_plugins_versions (file
, indent
);
759 print_to_asm_out_file (print_switch_type type
, const char * text
)
761 bool prepend_sep
= true;
765 case SWITCH_TYPE_LINE_END
:
766 putc ('\n', asm_out_file
);
769 case SWITCH_TYPE_LINE_START
:
770 fputs (ASM_COMMENT_START
, asm_out_file
);
771 return strlen (ASM_COMMENT_START
);
773 case SWITCH_TYPE_DESCRIPTIVE
:
774 if (ASM_COMMENT_START
[0] == 0)
777 case SWITCH_TYPE_PASSED
:
778 case SWITCH_TYPE_ENABLED
:
780 fputc (' ', asm_out_file
);
781 fputs (text
, asm_out_file
);
782 /* No need to return the length here as
783 print_single_switch has already done it. */
792 print_to_stderr (print_switch_type type
, const char * text
)
796 case SWITCH_TYPE_LINE_END
:
800 case SWITCH_TYPE_LINE_START
:
803 case SWITCH_TYPE_PASSED
:
804 case SWITCH_TYPE_ENABLED
:
808 case SWITCH_TYPE_DESCRIPTIVE
:
809 fputs (text
, stderr
);
810 /* No need to return the length here as
811 print_single_switch has already done it. */
819 /* Print an option value and return the adjusted position in the line.
820 ??? print_fn doesn't handle errors, eg disk full; presumably other
821 code will catch a disk full though. */
824 print_single_switch (print_switch_fn_type print_fn
,
826 print_switch_type type
,
829 /* The ultrix fprintf returns 0 on success, so compute the result
830 we want here since we need it for the following test. The +1
831 is for the separator character that will probably be emitted. */
832 int len
= strlen (text
) + 1;
835 && pos
+ len
> MAX_LINE
)
837 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
842 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
844 print_fn (type
, text
);
848 /* Print active target switches using PRINT_FN.
849 POS is the current cursor position and MAX is the size of a "line".
850 Each line begins with INDENT and ends with TERM.
851 Each switch is separated from the next by SEP. */
854 print_switch_values (print_switch_fn_type print_fn
)
859 /* Fill in the -frandom-seed option, if the user didn't pass it, so
860 that it can be printed below. This helps reproducibility. */
861 if (!flag_random_seed
)
864 /* Print the options as passed. */
865 pos
= print_single_switch (print_fn
, pos
,
866 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
868 for (j
= 1; j
< save_decoded_options_count
; j
++)
870 switch (save_decoded_options
[j
].opt_index
)
883 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
884 save_decoded_options
[j
].orig_option_with_args_text
);
888 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
890 /* Print the -f and -m options that have been enabled.
891 We don't handle language specific options but printing argv
893 pos
= print_single_switch (print_fn
, 0,
894 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
896 for (j
= 0; j
< cl_options_count
; j
++)
897 if (cl_options
[j
].cl_report
898 && option_enabled (j
, &global_options
) > 0)
899 pos
= print_single_switch (print_fn
, pos
,
900 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
902 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
905 /* Open assembly code output file. Do this even if -fsyntax-only is
906 on, because then the driver will have provided the name of a
907 temporary file or bit bucket for us. NAME is the file specified on
908 the command line, possibly NULL. */
910 init_asm_output (const char *name
)
912 if (name
== NULL
&& asm_file_name
== 0)
913 asm_out_file
= stdout
;
916 if (asm_file_name
== 0)
918 int len
= strlen (dump_base_name
);
919 char *dumpname
= XNEWVEC (char, len
+ 6);
921 memcpy (dumpname
, dump_base_name
, len
+ 1);
922 strip_off_ending (dumpname
, len
);
923 strcat (dumpname
, ".s");
924 asm_file_name
= dumpname
;
926 if (!strcmp (asm_file_name
, "-"))
927 asm_out_file
= stdout
;
929 asm_out_file
= fopen (asm_file_name
, "w");
930 if (asm_out_file
== 0)
931 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
934 if (!flag_syntax_only
)
936 targetm
.asm_out
.file_start ();
938 if (flag_record_gcc_switches
)
940 if (targetm
.asm_out
.record_gcc_switches
)
942 /* Let the target know that we are about to start recording. */
943 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
945 /* Now record the switches. */
946 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
947 /* Let the target know that the recording is over. */
948 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
952 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
955 if (flag_verbose_asm
)
957 /* Print the list of switches in effect
958 into the assembler file as comments. */
959 print_version (asm_out_file
, ASM_COMMENT_START
);
960 print_switch_values (print_to_asm_out_file
);
961 putc ('\n', asm_out_file
);
966 /* A helper function; used as the reallocator function for cpp's line
969 realloc_for_line_map (void *ptr
, size_t len
)
971 return ggc_realloc (ptr
, len
);
974 /* A helper function: used as the allocator function for
975 identifier_to_locale. */
977 alloc_for_identifier_to_locale (size_t len
)
979 return ggc_alloc_atomic (len
);
982 /* Output stack usage information. */
984 output_stack_usage (void)
986 static bool warning_issued
= false;
987 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
988 const char *stack_usage_kind_str
[] = {
993 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
994 enum stack_usage_kind_type stack_usage_kind
;
1000 warning (0, "stack usage computation not supported for this target");
1001 warning_issued
= true;
1006 stack_usage_kind
= STATIC
;
1008 /* Add the maximum amount of space pushed onto the stack. */
1009 if (current_function_pushed_stack_size
> 0)
1011 stack_usage
+= current_function_pushed_stack_size
;
1012 stack_usage_kind
= DYNAMIC_BOUNDED
;
1015 /* Now on to the tricky part: dynamic stack allocation. */
1016 if (current_function_allocates_dynamic_stack_space
)
1018 if (current_function_has_unbounded_dynamic_stack_size
)
1019 stack_usage_kind
= DYNAMIC
;
1021 stack_usage_kind
= DYNAMIC_BOUNDED
;
1023 /* Add the size even in the unbounded case, this can't hurt. */
1024 stack_usage
+= current_function_dynamic_stack_size
;
1027 if (flag_stack_usage
)
1029 expanded_location loc
1030 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1031 /* We don't want to print the full qualified name because it can be long,
1032 so we strip the scope prefix, but we may need to deal with the suffix
1033 created by the compiler. */
1035 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1037 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1040 const char *dot
= strchr (name
, '.');
1041 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1044 dot
= strchr (name
, '.');
1049 const char *dot
= strrchr (name
, '.');
1054 fprintf (stack_usage_file
,
1055 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1056 lbasename (loc
.file
),
1061 stack_usage_kind_str
[stack_usage_kind
]);
1064 if (warn_stack_usage
>= 0)
1066 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1068 if (stack_usage_kind
== DYNAMIC
)
1069 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1070 else if (stack_usage
> warn_stack_usage
)
1072 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1074 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1077 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1083 /* Open an auxiliary output file. */
1085 open_auxiliary_file (const char *ext
)
1090 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1091 file
= fopen (filename
, "w");
1093 fatal_error ("can%'t open %s for writing: %m", filename
);
1098 /* Initialization of the front end environment, before command line
1099 options are parsed. Signal handlers, internationalization etc.
1100 ARGV0 is main's argv[0]. */
1102 general_init (const char *argv0
)
1106 p
= argv0
+ strlen (argv0
);
1107 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1111 xmalloc_set_program_name (progname
);
1115 /* Unlock the stdio streams. */
1116 unlock_std_streams ();
1118 gcc_init_libintl ();
1120 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1121 identifier_to_locale_free
= ggc_free
;
1123 /* Initialize the diagnostics reporting machinery, so option parsing
1124 can give warnings and errors. */
1125 diagnostic_initialize (global_dc
, N_OPTS
);
1126 /* Set a default printer. Language specific initializations will
1127 override it later. */
1128 tree_diagnostics_defaults (global_dc
);
1130 global_dc
->show_caret
1131 = global_options_init
.x_flag_diagnostics_show_caret
;
1132 global_dc
->show_option_requested
1133 = global_options_init
.x_flag_diagnostics_show_option
;
1134 global_dc
->show_column
1135 = global_options_init
.x_flag_show_column
;
1136 global_dc
->internal_error
= plugins_internal_error_function
;
1137 global_dc
->option_enabled
= option_enabled
;
1138 global_dc
->option_state
= &global_options
;
1139 global_dc
->option_name
= option_name
;
1141 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1143 signal (SIGSEGV
, crash_signal
);
1146 signal (SIGILL
, crash_signal
);
1149 signal (SIGBUS
, crash_signal
);
1152 signal (SIGABRT
, crash_signal
);
1154 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1155 signal (SIGIOT
, crash_signal
);
1158 signal (SIGFPE
, crash_signal
);
1161 /* Other host-specific signal setup. */
1162 (*host_hooks
.extra_signals
)();
1164 /* Initialize the garbage-collector, string pools and tree type hash
1168 input_location
= UNKNOWN_LOCATION
;
1169 line_table
= ggc_alloc
<line_maps
> ();
1170 linemap_init (line_table
, BUILTINS_LOCATION
);
1171 line_table
->reallocator
= realloc_for_line_map
;
1172 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1175 /* Initialize register usage now so switches may override. */
1178 /* Register the language-independent parameters. */
1179 global_init_params ();
1181 /* This must be done after global_init_params but before argument
1183 init_ggc_heuristics ();
1185 /* Create the singleton holder for global state.
1186 Doing so also creates the pass manager and with it the passes. */
1187 g
= new gcc::context ();
1188 symtab
= ggc_cleared_alloc
<symbol_table
> ();
1190 statistics_early_init ();
1194 /* Return true if the current target supports -fsection-anchors. */
1197 target_supports_section_anchors_p (void)
1199 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1202 if (targetm
.asm_out
.output_anchor
== NULL
)
1208 /* Default the align_* variables to 1 if they're still unset, and
1209 set up the align_*_log variables. */
1211 init_alignments (void)
1213 if (align_loops
<= 0)
1215 if (align_loops_max_skip
> align_loops
)
1216 align_loops_max_skip
= align_loops
- 1;
1217 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1218 if (align_jumps
<= 0)
1220 if (align_jumps_max_skip
> align_jumps
)
1221 align_jumps_max_skip
= align_jumps
- 1;
1222 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1223 if (align_labels
<= 0)
1225 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1226 if (align_labels_max_skip
> align_labels
)
1227 align_labels_max_skip
= align_labels
- 1;
1228 if (align_functions
<= 0)
1229 align_functions
= 1;
1230 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1233 /* Process the options that have been parsed. */
1235 process_options (void)
1237 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1238 This can happen with incorrect pre-processed input. */
1239 debug_hooks
= &do_nothing_debug_hooks
;
1241 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1243 /* Default to -fdiagnostics-color=auto if GCC_COLORS is in the environment,
1244 otherwise default to -fdiagnostics-color=never. */
1245 if (!global_options_set
.x_flag_diagnostics_show_color
1246 && getenv ("GCC_COLORS"))
1247 pp_show_color (global_dc
->printer
)
1248 = colorize_init (DIAGNOSTICS_COLOR_AUTO
);
1250 /* Allow the front end to perform consistency checks and do further
1251 initialization based on the command line options. This hook also
1252 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1253 so we can correctly initialize debug output. */
1254 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1256 /* Some machines may reject certain combinations of options. */
1257 targetm
.target_option
.override ();
1259 /* Avoid any informative notes in the second run of -fcompare-debug. */
1260 if (flag_compare_debug
)
1261 diagnostic_inhibit_notes (global_dc
);
1263 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1265 warning (OPT_fsection_anchors
,
1266 "this target does not support %qs", "-fsection-anchors");
1267 flag_section_anchors
= 0;
1270 if (flag_short_enums
== 2)
1271 flag_short_enums
= targetm
.default_short_enums ();
1273 /* Set aux_base_name if not already set. */
1276 else if (main_input_filename
)
1278 char *name
= xstrdup (lbasename (main_input_filename
));
1280 strip_off_ending (name
, strlen (name
));
1281 aux_base_name
= name
;
1284 aux_base_name
= "gccaux";
1288 || flag_graphite_identity
1290 || flag_loop_interchange
1291 || flag_loop_strip_mine
1292 || flag_loop_parallelize_all
)
1293 sorry ("Graphite loop optimizations cannot be used (ISL is not available)"
1294 "(-fgraphite, -fgraphite-identity, -floop-block, "
1295 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1296 "and -ftree-loop-linear)");
1299 /* One region RA really helps to decrease the code size. */
1300 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1302 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1304 if (!abi_version_at_least (2))
1306 /* -fabi-version=1 support was removed after GCC 4.9. */
1307 error ("%<-fabi-version=1%> is no longer supported");
1308 flag_abi_version
= 2;
1311 /* Unrolling all loops implies that standard loop unrolling must also
1313 if (flag_unroll_all_loops
)
1314 flag_unroll_loops
= 1;
1316 /* web and rename-registers help when run after loop unrolling. */
1317 if (flag_web
== AUTODETECT_VALUE
)
1318 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1320 if (flag_rename_registers
== AUTODETECT_VALUE
)
1321 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1323 if (flag_non_call_exceptions
)
1324 flag_asynchronous_unwind_tables
= 1;
1325 if (flag_asynchronous_unwind_tables
)
1326 flag_unwind_tables
= 1;
1328 if (flag_value_profile_transformations
)
1329 flag_profile_values
= 1;
1331 /* Warn about options that are not supported on this machine. */
1332 #ifndef INSN_SCHEDULING
1333 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1334 warning (0, "instruction scheduling not supported on this target machine");
1337 if (flag_delayed_branch
)
1338 warning (0, "this target machine does not have delayed branches");
1341 user_label_prefix
= USER_LABEL_PREFIX
;
1342 if (flag_leading_underscore
!= -1)
1344 /* If the default prefix is more complicated than "" or "_",
1345 issue a warning and ignore this option. */
1346 if (user_label_prefix
[0] == 0 ||
1347 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1349 user_label_prefix
= flag_leading_underscore
? "_" : "";
1352 warning (0, "-f%sleading-underscore not supported on this target machine",
1353 flag_leading_underscore
? "" : "no-");
1356 /* If we are in verbose mode, write out the version and maybe all the
1357 option flags in use. */
1360 print_version (stderr
, "");
1362 print_switch_values (print_to_stderr
);
1365 if (flag_syntax_only
)
1367 write_symbols
= NO_DEBUG
;
1373 if (debug_info_level
== DINFO_LEVEL_NONE
)
1375 debug_info_level
= DINFO_LEVEL_NORMAL
;
1377 if (write_symbols
== NO_DEBUG
)
1378 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1381 debug_info_level
= DINFO_LEVEL_NONE
;
1384 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1386 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1389 error ("could not open final insn dump file %qs: %m",
1390 flag_dump_final_insns
);
1391 flag_dump_final_insns
= NULL
;
1393 else if (fclose (final_output
))
1395 error ("could not close zeroed insn dump file %qs: %m",
1396 flag_dump_final_insns
);
1397 flag_dump_final_insns
= NULL
;
1401 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1403 if (debug_info_level
== DINFO_LEVEL_NONE
)
1404 write_symbols
= NO_DEBUG
;
1406 if (write_symbols
== NO_DEBUG
)
1408 #if defined(DBX_DEBUGGING_INFO)
1409 else if (write_symbols
== DBX_DEBUG
)
1410 debug_hooks
= &dbx_debug_hooks
;
1412 #if defined(XCOFF_DEBUGGING_INFO)
1413 else if (write_symbols
== XCOFF_DEBUG
)
1414 debug_hooks
= &xcoff_debug_hooks
;
1416 #ifdef SDB_DEBUGGING_INFO
1417 else if (write_symbols
== SDB_DEBUG
)
1418 debug_hooks
= &sdb_debug_hooks
;
1420 #ifdef DWARF2_DEBUGGING_INFO
1421 else if (write_symbols
== DWARF2_DEBUG
)
1422 debug_hooks
= &dwarf2_debug_hooks
;
1424 #ifdef VMS_DEBUGGING_INFO
1425 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1426 debug_hooks
= &vmsdbg_debug_hooks
;
1429 error ("target system does not support the \"%s\" debug format",
1430 debug_type_names
[write_symbols
]);
1432 /* We know which debug output will be used so we can set flag_var_tracking
1433 and flag_var_tracking_uninit if the user has not specified them. */
1434 if (debug_info_level
< DINFO_LEVEL_NORMAL
1435 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1437 if (flag_var_tracking
== 1
1438 || flag_var_tracking_uninit
== 1)
1440 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1441 warning (0, "variable tracking requested, but useless unless "
1442 "producing debug info");
1444 warning (0, "variable tracking requested, but not supported "
1445 "by this debug format");
1447 flag_var_tracking
= 0;
1448 flag_var_tracking_uninit
= 0;
1451 /* The debug hooks are used to implement -fdump-go-spec because it
1452 gives a simple and stable API for all the information we need to
1454 if (flag_dump_go_spec
!= NULL
)
1455 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1457 /* If the user specifically requested variable tracking with tagging
1458 uninitialized variables, we need to turn on variable tracking.
1459 (We already determined above that variable tracking is feasible.) */
1460 if (flag_var_tracking_uninit
== 1)
1461 flag_var_tracking
= 1;
1463 if (flag_var_tracking
== AUTODETECT_VALUE
)
1464 flag_var_tracking
= optimize
>= 1;
1466 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1467 flag_var_tracking_uninit
= flag_var_tracking
;
1469 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1470 flag_var_tracking_assignments
= flag_var_tracking
1471 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1473 if (flag_var_tracking_assignments_toggle
)
1474 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1476 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1477 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1479 if (flag_var_tracking_assignments
1480 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1481 warning (0, "var-tracking-assignments changes selective scheduling");
1483 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1484 #ifdef HAVE_conditional_move
1485 flag_tree_cselim
= 1;
1487 flag_tree_cselim
= 0;
1490 /* If auxiliary info generation is desired, open the output file.
1491 This goes in the same directory as the source file--unlike
1492 all the other output files. */
1493 if (flag_gen_aux_info
)
1495 aux_info_file
= fopen (aux_info_file_name
, "w");
1496 if (aux_info_file
== 0)
1497 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1500 if (!targetm_common
.have_named_sections
)
1502 if (flag_function_sections
)
1504 warning (0, "-ffunction-sections not supported for this target");
1505 flag_function_sections
= 0;
1507 if (flag_data_sections
)
1509 warning (0, "-fdata-sections not supported for this target");
1510 flag_data_sections
= 0;
1514 #ifndef HAVE_prefetch
1515 if (flag_prefetch_loop_arrays
> 0)
1517 warning (0, "-fprefetch-loop-arrays not supported for this target");
1518 flag_prefetch_loop_arrays
= 0;
1521 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1523 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1524 flag_prefetch_loop_arrays
= 0;
1528 /* This combination of options isn't handled for i386 targets and doesn't
1529 make much sense anyway, so don't allow it. */
1530 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1532 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1533 flag_prefetch_loop_arrays
= 0;
1536 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1537 if (flag_signaling_nans
)
1538 flag_trapping_math
= 1;
1540 /* We cannot reassociate if we want traps or signed zeros. */
1541 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1543 warning (0, "-fassociative-math disabled; other options take precedence");
1544 flag_associative_math
= 0;
1547 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1548 if (flag_cx_limited_range
)
1549 flag_complex_method
= 0;
1551 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1552 if (flag_cx_fortran_rules
)
1553 flag_complex_method
= 1;
1555 /* Targets must be able to place spill slots at lower addresses. If the
1556 target already uses a soft frame pointer, the transition is trivial. */
1557 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1559 warning (0, "-fstack-protector not supported for this target");
1560 flag_stack_protect
= 0;
1562 if (!flag_stack_protect
)
1563 warn_stack_protect
= 0;
1565 /* Address Sanitizer needs porting to each target architecture. */
1567 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1568 && !FRAME_GROWS_DOWNWARD
)
1571 "-fsanitize=address and -fsanitize=kernel-address "
1572 "are not supported for this target");
1573 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1576 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1577 && targetm
.asan_shadow_offset
== NULL
)
1579 warning (0, "-fsanitize=address not supported for this target");
1580 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1583 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1584 have not been set. */
1585 if (!global_options_set
.x_warnings_are_errors
1586 && warn_coverage_mismatch
1587 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1589 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1590 DK_ERROR
, UNKNOWN_LOCATION
);
1592 /* Save the current optimization options. */
1593 optimization_default_node
= build_optimization_node (&global_options
);
1594 optimization_current_node
= optimization_default_node
;
1597 /* This function can be called multiple times to reinitialize the compiler
1598 back end when register classes or instruction sets have changed,
1599 before each function. */
1601 backend_init_target (void)
1603 /* Initialize alignment variables. */
1606 /* This depends on stack_pointer_rtx. */
1607 init_fake_stack_mems ();
1609 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1611 init_alias_target ();
1613 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1616 /* Depends on the enabled attribute. */
1619 /* The following initialization functions need to generate rtl, so
1620 provide a dummy function context for them. */
1621 init_dummy_function_start ();
1623 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1624 on a mode change. */
1626 init_lower_subreg ();
1629 init_expr_target ();
1632 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1633 after a mode change as well. */
1634 caller_save_initialized_p
= false;
1636 expand_dummy_function_end ();
1639 /* Initialize the compiler back end. This function is called only once,
1640 when starting the compiler. */
1647 init_inline_once ();
1648 init_varasm_once ();
1649 save_register_info ();
1651 /* Middle end needs this initialization for default mem attributes
1652 used by early calls to make_decl_rtl. */
1655 /* Middle end needs this initialization for mode tables used to assign
1656 modes to vector variables. */
1660 /* Initialize excess precision settings. */
1662 init_excess_precision (void)
1664 /* Adjust excess precision handling based on the target options. If
1665 the front end cannot handle it, flag_excess_precision_cmdline
1666 will already have been set accordingly in the post_options
1668 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1669 flag_excess_precision
= flag_excess_precision_cmdline
;
1670 if (flag_unsafe_math_optimizations
)
1671 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1672 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1674 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1675 switch (flt_eval_method
)
1679 /* Either the target acts unpredictably (-1) or has all the
1680 operations required not to have excess precision (0). */
1681 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1685 /* In these cases, predictable excess precision makes
1689 /* Any other implementation-defined FLT_EVAL_METHOD values
1690 require the compiler to handle the associated excess
1691 precision rules in excess_precision_type. */
1697 /* Initialize things that are both lang-dependent and target-dependent.
1698 This function can be called more than once if target parameters change. */
1700 lang_dependent_init_target (void)
1702 /* This determines excess precision settings. */
1703 init_excess_precision ();
1705 /* This creates various _DECL nodes, so needs to be called after the
1706 front end is initialized. It also depends on the HAVE_xxx macros
1707 generated from the target machine description. */
1710 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1713 /* Perform initializations that are lang-dependent or target-dependent.
1714 but matters only for late optimizations and RTL generation. */
1716 static int rtl_initialized
;
1719 initialize_rtl (void)
1721 /* Initialization done just once per compilation, but delayed
1722 till code generation. */
1723 if (!rtl_initialized
)
1725 rtl_initialized
= true;
1727 /* Target specific RTL backend initialization. */
1728 if (!this_target_rtl
->target_specific_initialized
)
1730 backend_init_target ();
1731 this_target_rtl
->target_specific_initialized
= true;
1735 /* Language-dependent initialization. Returns nonzero on success. */
1737 lang_dependent_init (const char *name
)
1739 location_t save_loc
= input_location
;
1740 if (dump_base_name
== 0)
1741 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1743 /* Other front-end initialization. */
1744 input_location
= BUILTINS_LOCATION
;
1745 if (lang_hooks
.init () == 0)
1747 input_location
= save_loc
;
1751 init_asm_output (name
);
1753 /* If stack usage information is desired, open the output file. */
1754 if (flag_stack_usage
)
1755 stack_usage_file
= open_auxiliary_file ("su");
1758 /* This creates various _DECL nodes, so needs to be called after the
1759 front end is initialized. */
1762 /* Do the target-specific parts of the initialization. */
1763 lang_dependent_init_target ();
1767 /* If dbx symbol table desired, initialize writing it and output the
1768 predefined types. */
1769 timevar_push (TV_SYMOUT
);
1771 /* Now we have the correct original filename, we can initialize
1773 (*debug_hooks
->init
) (name
);
1775 timevar_pop (TV_SYMOUT
);
1782 /* Reinitialize everything when target parameters, such as register usage,
1785 target_reinit (void)
1787 struct rtl_data saved_x_rtl
;
1788 rtx
*saved_regno_reg_rtx
;
1789 tree saved_optimization_current_node
;
1790 struct target_optabs
*saved_this_fn_optabs
;
1792 /* Temporarily switch to the default optimization node, so that
1793 *this_target_optabs is set to the default, not reflecting
1794 whatever a previous function used for the optimize
1796 saved_optimization_current_node
= optimization_current_node
;
1797 saved_this_fn_optabs
= this_fn_optabs
;
1798 if (saved_optimization_current_node
!= optimization_default_node
)
1800 optimization_current_node
= optimization_default_node
;
1801 cl_optimization_restore
1803 TREE_OPTIMIZATION (optimization_default_node
));
1805 this_fn_optabs
= this_target_optabs
;
1807 /* Save *crtl and regno_reg_rtx around the reinitialization
1808 to allow target_reinit being called even after prepare_function_start. */
1809 saved_regno_reg_rtx
= regno_reg_rtx
;
1810 if (saved_regno_reg_rtx
)
1812 saved_x_rtl
= *crtl
;
1813 memset (crtl
, '\0', sizeof (*crtl
));
1814 regno_reg_rtx
= NULL
;
1817 this_target_rtl
->target_specific_initialized
= false;
1819 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1820 to initialize reg_raw_mode[]. */
1823 /* This invokes target hooks to set fixed_reg[] etc, which is
1827 /* Reinitialize lang-dependent parts. */
1828 lang_dependent_init_target ();
1830 /* Restore the original optimization node. */
1831 if (saved_optimization_current_node
!= optimization_default_node
)
1833 optimization_current_node
= saved_optimization_current_node
;
1834 cl_optimization_restore (&global_options
,
1835 TREE_OPTIMIZATION (optimization_current_node
));
1837 this_fn_optabs
= saved_this_fn_optabs
;
1839 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1840 expand_dummy_function_end clears it. */
1841 if (saved_regno_reg_rtx
)
1843 *crtl
= saved_x_rtl
;
1844 regno_reg_rtx
= saved_regno_reg_rtx
;
1845 saved_regno_reg_rtx
= NULL
;
1850 dump_memory_report (bool final
)
1852 dump_line_table_statistics ();
1853 ggc_print_statistics ();
1854 stringpool_statistics ();
1855 dump_tree_statistics ();
1856 dump_gimple_statistics ();
1857 dump_rtx_statistics ();
1858 dump_alloc_pool_statistics ();
1859 dump_bitmap_statistics ();
1860 dump_vec_loc_statistics ();
1861 dump_ggc_loc_statistics (final
);
1862 dump_alias_stats (stderr
);
1863 dump_pta_stats (stderr
);
1866 /* Clean up: close opened files, etc. */
1869 finalize (bool no_backend
)
1871 /* Close the dump files. */
1872 if (flag_gen_aux_info
)
1874 fclose (aux_info_file
);
1876 unlink (aux_info_file_name
);
1879 /* Close non-debugging input and output files. Take special care to note
1880 whether fclose returns an error, since the pages might still be on the
1881 buffer chain while the file is open. */
1885 if (ferror (asm_out_file
) != 0)
1886 fatal_error ("error writing to %s: %m", asm_file_name
);
1887 if (fclose (asm_out_file
) != 0)
1888 fatal_error ("error closing %s: %m", asm_file_name
);
1891 if (stack_usage_file
)
1892 fclose (stack_usage_file
);
1898 g
->get_passes ()->finish_optimization_passes ();
1904 dump_memory_report (true);
1907 dump_profile_report ();
1909 /* Language-specific end of compilation actions. */
1910 lang_hooks
.finish ();
1914 standard_type_bitsize (int bitsize
)
1916 /* As a special exception, we always want __int128 enabled if possible. */
1919 if (bitsize
== CHAR_TYPE_SIZE
1920 || bitsize
== SHORT_TYPE_SIZE
1921 || bitsize
== INT_TYPE_SIZE
1922 || bitsize
== LONG_TYPE_SIZE
1923 || bitsize
== LONG_LONG_TYPE_SIZE
)
1928 /* Initialize the compiler, and compile the input file. */
1934 /* Don't do any more if an error has already occurred. */
1939 timevar_start (TV_PHASE_SETUP
);
1941 /* This must be run always, because it is needed to compute the FP
1942 predefined macros, such as __LDBL_MAX__, for targets using non
1943 default FP formats. */
1944 init_adjust_machine_modes ();
1945 init_derived_machine_modes ();
1947 /* This must happen after the backend has a chance to process
1948 command line options, but before the parsers are
1950 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
1951 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
1952 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
1953 int_n_enabled_p
[i
] = true;
1955 int_n_enabled_p
[i
] = false;
1957 /* Set up the back-end if requested. */
1961 /* Language-dependent initialization. Returns true on success. */
1962 if (lang_dependent_init (main_input_filename
))
1964 /* Initialize yet another pass. */
1966 ggc_protect_identifiers
= true;
1968 symtab
->initialize ();
1969 init_final (main_input_filename
);
1970 coverage_init (aux_base_name
);
1972 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
1974 timevar_stop (TV_PHASE_SETUP
);
1980 timevar_stop (TV_PHASE_SETUP
);
1983 timevar_start (TV_PHASE_FINALIZE
);
1985 finalize (no_backend
);
1987 timevar_stop (TV_PHASE_FINALIZE
);
1991 toplev::toplev (bool use_TV_TOTAL
)
1992 : m_use_TV_TOTAL (use_TV_TOTAL
)
1994 if (!m_use_TV_TOTAL
)
2000 timevar_stop (TV_TOTAL
);
2001 timevar_print (stderr
);
2005 toplev::start_timevars ()
2007 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2010 timevar_start (TV_TOTAL
);
2013 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2014 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2015 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2017 It is not safe to call this function more than once. */
2020 toplev::main (int argc
, char **argv
)
2022 /* Parsing and gimplification sometimes need quite large stack.
2023 Increase stack size limits if possible. */
2024 stack_limit_increase (64 * 1024 * 1024);
2026 expandargv (&argc
, &argv
);
2028 /* Initialization of GCC's environment, and diagnostics. */
2029 general_init (argv
[0]);
2031 /* One-off initialization of options that does not need to be
2032 repeated when options are added for particular functions. */
2033 init_options_once ();
2035 /* Initialize global options structures; this must be repeated for
2036 each structure used for parsing options. */
2037 init_options_struct (&global_options
, &global_options_set
);
2038 lang_hooks
.init_options_struct (&global_options
);
2040 /* Convert the options to an array. */
2041 decode_cmdline_options_to_array_default_mask (argc
,
2042 CONST_CAST2 (const char **,
2044 &save_decoded_options
,
2045 &save_decoded_options_count
);
2047 /* Perform language-specific options initialization. */
2048 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2050 /* Parse the options and do minimal processing; basically just
2051 enough to default flags appropriately. */
2052 decode_options (&global_options
, &global_options_set
,
2053 save_decoded_options
, save_decoded_options_count
,
2054 UNKNOWN_LOCATION
, global_dc
);
2056 handle_common_deferred_options ();
2060 initialize_plugins ();
2063 print_version (stderr
, "");
2066 print_plugins_help (stderr
, "");
2068 /* Exit early if we can (e.g. -help). */
2069 if (!exit_after_options
)
2076 if (warningcount
|| errorcount
|| werrorcount
)
2077 print_ignored_options ();
2079 /* Invoke registered plugin callbacks if any. Some plugins could
2080 emit some diagnostics here. */
2081 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2083 diagnostic_finish (global_dc
);
2085 finalize_plugins ();
2086 location_adhoc_data_fini (line_table
);
2087 if (seen_error () || werrorcount
)
2088 return (FATAL_EXIT_CODE
);
2090 return (SUCCESS_EXIT_CODE
);
2093 /* For those that want to, this function aims to clean up enough state that
2094 you can call toplev::main again. */
2096 toplev::finalize (void)
2098 rtl_initialized
= false;
2099 this_target_rtl
->target_specific_initialized
= false;
2101 cgraph_c_finalize ();
2102 cgraphunit_c_finalize ();
2103 dwarf2out_c_finalize ();
2105 ipa_cp_c_finalize ();
2106 ipa_reference_c_finalize ();
2107 params_c_finalize ();