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"
34 #include "double-int.h"
40 #include "fold-const.h"
42 #include "tree-inline.h"
43 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
48 #include "insn-attr.h"
49 #include "insn-config.h"
50 #include "insn-flags.h"
51 #include "hard-reg-set.h"
58 #include "statistics.h"
60 #include "fixed-value.h"
71 #include "diagnostic.h"
72 #include "tree-diagnostic.h"
73 #include "tree-pretty-print.h"
78 #include "dwarf2asm.h"
81 #include "common/common-target.h"
82 #include "langhooks.h"
83 #include "cfgloop.h" /* for init_set_costs */
84 #include "hosthooks.h"
86 #include "basic-block.h"
89 #include "plugin-api.h"
93 #include "opts-diagnostic.h"
95 #include "value-prof.h"
96 #include "alloc-pool.h"
99 #include "tree-ssa-alias.h"
100 #include "internal-fn.h"
101 #include "gimple-expr.h"
105 #include "pass_manager.h"
106 #include "auto-profile.h"
107 #include "dwarf2out.h"
109 #include "ipa-reference.h"
110 #include "symbol-summary.h"
111 #include "ipa-prop.h"
113 #include "insn-codes.h"
115 #include "tree-chkp.h"
118 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
122 #ifdef SDB_DEBUGGING_INFO
126 #ifdef XCOFF_DEBUGGING_INFO
127 #include "xcoffout.h" /* Needed for external data
128 declarations for e.g. AIX 4.x. */
131 #ifndef HAVE_prologue
132 #define HAVE_prologue 0
137 static void general_init (const char *, bool);
138 static void do_compile ();
139 static void process_options (void);
140 static void backend_init (void);
141 static int lang_dependent_init (const char *);
142 static void init_asm_output (const char *);
143 static void finalize (bool);
145 static void crash_signal (int) ATTRIBUTE_NORETURN
;
146 static void compile_file (void);
148 /* True if we don't need a backend (e.g. preprocessing only). */
149 static bool no_backend
;
151 /* Length of line when printing switch values. */
154 /* Decoded options, and number of such options. */
155 struct cl_decoded_option
*save_decoded_options
;
156 unsigned int save_decoded_options_count
;
158 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
159 to optimize in process_options (). */
160 #define AUTODETECT_VALUE 2
162 /* Debug hooks - dependent upon command line options. */
164 const struct gcc_debug_hooks
*debug_hooks
;
166 /* The FUNCTION_DECL for the function currently being compiled,
167 or 0 if between functions. */
168 tree current_function_decl
;
170 /* Set to the FUNC_BEGIN label of the current function, or NULL
172 const char * current_function_func_begin_label
;
174 /* A random sequence of characters, unless overridden by user. */
175 static const char *flag_random_seed
;
177 /* A local time stamp derived from the time of compilation. It will be
178 zero if the system cannot provide a time. It will be -1u, if the
179 user has specified a particular random seed. */
182 /* Random number for this compilation */
183 HOST_WIDE_INT random_seed
;
187 /* When non-NULL, indicates that whenever space is allocated on the
188 stack, the resulting stack pointer must not pass this
189 address---that is, for stacks that grow downward, the stack pointer
190 must always be greater than or equal to this address; for stacks
191 that grow upward, the stack pointer must be less than this address.
192 At present, the rtx may be either a REG or a SYMBOL_REF, although
193 the support provided depends on the backend. */
196 /* True if the user has tagged the function with the 'section'
199 bool user_defined_section_attribute
= false;
201 struct target_flag_state default_target_flag_state
;
202 #if SWITCHABLE_TARGET
203 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
205 #define this_target_flag_state (&default_target_flag_state)
208 /* The user symbol prefix after having resolved same. */
209 const char *user_label_prefix
;
211 /* Output files for assembler code (real compiler output)
212 and debugging dumps. */
216 FILE *stack_usage_file
= NULL
;
218 /* The current working directory of a translation. It's generally the
219 directory from which compilation was initiated, but a preprocessed
220 file may specify the original directory in which it was
223 static const char *src_pwd
;
225 /* Initialize src_pwd with the given string, and return true. If it
226 was already initialized, return false. As a special case, it may
227 be called with a NULL argument to test whether src_pwd has NOT been
231 set_src_pwd (const char *pwd
)
235 if (strcmp (src_pwd
, pwd
) == 0)
241 src_pwd
= xstrdup (pwd
);
245 /* Return the directory from which the translation unit was initiated,
246 in case set_src_pwd() was not called before to assign it a
262 /* Called when the start of a function definition is parsed,
263 this function prints on stderr the name of the function. */
265 announce_function (tree decl
)
269 if (rtl_dump_and_exit
)
270 fprintf (stderr
, "%s ",
271 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
273 fprintf (stderr
, " %s",
274 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
276 pp_needs_newline (global_dc
->printer
) = true;
277 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
281 /* Initialize local_tick with a random number or -1 if
282 flag_random_seed is set. */
285 init_local_tick (void)
287 if (!flag_random_seed
)
289 /* Try urandom first. Time of day is too likely to collide.
290 In case of any error we just use the local tick. */
292 int fd
= open ("/dev/urandom", O_RDONLY
);
295 if (read (fd
, &random_seed
, sizeof (random_seed
))
296 != sizeof (random_seed
))
301 /* Now get the tick anyways */
302 #ifdef HAVE_GETTIMEOFDAY
306 gettimeofday (&tv
, NULL
);
307 local_tick
= (unsigned) tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
311 time_t now
= time (NULL
);
313 if (now
!= (time_t)-1)
314 local_tick
= (unsigned) now
;
322 /* Set up a default flag_random_seed and local_tick, unless the user
323 already specified one. Must be called after init_local_tick. */
326 init_random_seed (void)
329 random_seed
= local_tick
^ getpid (); /* Old racey fallback method */
332 /* Obtain the random_seed. Unless NOINIT, initialize it if
333 it's not provided in the command line. */
336 get_random_seed (bool noinit
)
338 if (!flag_random_seed
&& !noinit
)
343 /* Modify the random_seed string to VAL. Return its previous
347 set_random_seed (const char *val
)
349 const char *old
= flag_random_seed
;
350 flag_random_seed
= val
;
351 if (flag_random_seed
)
355 /* When the driver passed in a hex number don't crc it again */
356 random_seed
= strtoul (flag_random_seed
, &endp
, 0);
357 if (!(endp
> flag_random_seed
&& *endp
== 0))
358 random_seed
= crc32_string (0, flag_random_seed
);
363 /* Handler for fatal signals, such as SIGSEGV. These are transformed
364 into ICE messages, which is much more user friendly. In case the
365 error printer crashes, reset the signal to prevent infinite recursion. */
368 crash_signal (int signo
)
370 signal (signo
, SIG_DFL
);
372 /* If we crashed while processing an ASM statement, then be a little more
373 graceful. It's most likely the user's fault. */
374 if (this_is_asm_operands
)
376 output_operand_lossage ("unrecoverable error");
377 exit (FATAL_EXIT_CODE
);
380 internal_error ("%s", strsignal (signo
));
383 /* A subroutine of wrapup_global_declarations. We've come to the end of
384 the compilation unit. All deferred variables should be undeferred,
385 and all incomplete decls should be finalized. */
388 wrapup_global_declaration_1 (tree decl
)
390 /* We're not deferring this any longer. Assignment is conditional to
391 avoid needlessly dirtying PCH pages. */
392 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
393 && DECL_DEFER_OUTPUT (decl
) != 0)
394 DECL_DEFER_OUTPUT (decl
) = 0;
396 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
397 lang_hooks
.finish_incomplete_decl (decl
);
400 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
401 needs to be output. Return true if it is output. */
404 wrapup_global_declaration_2 (tree decl
)
406 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
)
407 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_HAS_VALUE_EXPR_P (decl
)))
410 /* Don't write out static consts, unless we still need them.
412 We also keep static consts if not optimizing (for debugging),
413 unless the user specified -fno-keep-static-consts.
414 ??? They might be better written into the debug information.
415 This is possible when using DWARF.
417 A language processor that wants static constants to be always
418 written out (even if it is not used) is responsible for
419 calling rest_of_decl_compilation itself. E.g. the C front-end
420 calls rest_of_decl_compilation from finish_decl.
421 One motivation for this is that is conventional in some
422 environments to write things like:
423 static const char rcsid[] = "... version string ...";
424 intending to force the string to be in the executable.
426 A language processor that would prefer to have unneeded
427 static constants "optimized away" would just defer writing
428 them out until here. E.g. C++ does this, because static
429 constants are often defined in header files.
431 ??? A tempting alternative (for both C and C++) would be
432 to force a constant to be written if and only if it is
433 defined in a main file, as opposed to an include file. */
435 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
439 node
= varpool_node::get (decl
);
441 if (!node
&& flag_ltrans
)
443 else if (node
&& node
->definition
)
445 else if (node
&& node
->alias
)
447 else if (!symtab
->global_info_ready
449 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
451 else if (node
&& node
->analyzed
)
453 else if (DECL_COMDAT (decl
))
455 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
456 && (optimize
|| !flag_keep_static_consts
457 || DECL_ARTIFICIAL (decl
)))
462 rest_of_decl_compilation (decl
, 1, 1);
470 /* Do any final processing required for the declarations in VEC, of
471 which there are LEN. We write out inline functions and variables
472 that have been deferred until this point, but which are required.
473 Returns nonzero if anything was put out. */
476 wrapup_global_declarations (tree
*vec
, int len
)
478 bool reconsider
, output_something
= false;
481 for (i
= 0; i
< len
; i
++)
482 wrapup_global_declaration_1 (vec
[i
]);
484 /* Now emit any global variables or functions that we have been
485 putting off. We need to loop in case one of the things emitted
486 here references another one which comes earlier in the list. */
490 for (i
= 0; i
< len
; i
++)
491 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
493 output_something
= true;
497 return output_something
;
500 /* A subroutine of check_global_declarations. Issue appropriate warnings
501 for the global declaration DECL. */
504 check_global_declaration_1 (tree decl
)
506 /* Warn about any function declared static but not defined. We don't
507 warn about variables, because many programs have static variables
508 that exist only to get some text into the object file. */
509 if (TREE_CODE (decl
) == FUNCTION_DECL
510 && DECL_INITIAL (decl
) == 0
511 && DECL_EXTERNAL (decl
)
512 && ! DECL_ARTIFICIAL (decl
)
513 && ! TREE_NO_WARNING (decl
)
514 && ! TREE_PUBLIC (decl
)
515 && (warn_unused_function
516 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
518 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
519 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
521 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
522 /* This symbol is effectively an "extern" declaration now. */
523 TREE_PUBLIC (decl
) = 1;
526 /* Warn about static fns or vars defined but not used. */
527 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
528 /* We don't warn about "static const" variables because the
529 "rcs_id" idiom uses that construction. */
530 || (warn_unused_variable
531 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
532 && ! DECL_IN_SYSTEM_HEADER (decl
)
533 && ! TREE_USED (decl
)
534 /* The TREE_USED bit for file-scope decls is kept in the identifier,
535 to handle multiple external decls in different scopes. */
536 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
537 && ! DECL_EXTERNAL (decl
)
538 && ! TREE_PUBLIC (decl
)
539 /* A volatile variable might be used in some non-obvious way. */
540 && ! TREE_THIS_VOLATILE (decl
)
541 /* Global register variables must be declared to reserve them. */
542 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
543 /* Otherwise, ask the language. */
544 && lang_hooks
.decls
.warn_unused_global (decl
))
545 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
546 ? OPT_Wunused_function
547 : OPT_Wunused_variable
,
548 "%q+D defined but not used", decl
);
551 /* Issue appropriate warnings for the global declarations in V (of
552 which there are LEN). */
555 check_global_declarations (tree
*v
, int len
)
559 for (i
= 0; i
< len
; i
++)
560 check_global_declaration_1 (v
[i
]);
563 /* Emit debugging information for all global declarations in VEC. */
566 emit_debug_global_declarations (tree
*vec
, int len
)
570 /* Avoid confusing the debug information machinery when there are errors. */
573 /* No need for debug info in object files when producing slimLTO. */
574 if (!in_lto_p
&& flag_lto
&& !flag_fat_lto_objects
)
577 timevar_push (TV_SYMOUT
);
578 for (i
= 0; i
< len
; i
++)
579 debug_hooks
->global_decl (vec
[i
]);
580 timevar_pop (TV_SYMOUT
);
583 /* Compile an entire translation unit. Write a file of assembly
584 output and various debugging dumps. */
589 timevar_start (TV_PHASE_PARSING
);
590 timevar_push (TV_PARSE_GLOBAL
);
592 /* Call the parser, which parses the entire file (calling
593 rest_of_compilation for each function). */
594 lang_hooks
.parse_file ();
596 timevar_pop (TV_PARSE_GLOBAL
);
597 timevar_stop (TV_PHASE_PARSING
);
599 if (flag_dump_locations
)
600 dump_location_info (stderr
);
602 /* Compilation is now finished except for writing
603 what's left of the symbol table output. */
605 if (flag_syntax_only
|| flag_wpa
)
608 ggc_protect_identifiers
= false;
610 /* This must also call finalize_compilation_unit. */
611 lang_hooks
.decls
.final_write_globals ();
616 timevar_start (TV_PHASE_LATE_ASM
);
618 /* Compilation unit is finalized. When producing non-fat LTO object, we are
619 basically finished. */
620 if (in_lto_p
|| !flag_lto
|| flag_fat_lto_objects
)
622 /* File-scope initialization for AddressSanitizer. */
623 if (flag_sanitize
& SANITIZE_ADDRESS
)
626 if (flag_sanitize
& SANITIZE_THREAD
)
629 if (flag_check_pointer_bounds
)
634 output_shared_constant_pool ();
635 output_object_blocks ();
636 finish_tm_clone_pairs ();
638 /* Write out any pending weak symbol declarations. */
641 /* This must be at the end before unwind and debug info.
642 Some target ports emit PIC setup thunks here. */
643 targetm
.asm_out
.code_end ();
645 /* Do dbx symbols. */
646 timevar_push (TV_SYMOUT
);
648 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
649 if (dwarf2out_do_frame ())
650 dwarf2out_frame_finish ();
653 (*debug_hooks
->finish
) (main_input_filename
);
654 timevar_pop (TV_SYMOUT
);
656 /* Output some stuff at end of file if nec. */
658 dw2_output_indirect_constants ();
660 /* Flush any pending external directives. */
661 process_pending_assemble_externals ();
664 /* Emit LTO marker if LTO info has been previously emitted. This is
665 used by collect2 to determine whether an object file contains IL.
666 We used to emit an undefined reference here, but this produces
667 link errors if an object file with IL is stored into a shared
668 library without invoking lto1. */
669 if (flag_generate_lto
|| flag_generate_offload
)
671 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
672 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
674 (unsigned HOST_WIDE_INT
) 1, 8);
675 #elif defined ASM_OUTPUT_ALIGNED_COMMON
676 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
677 (unsigned HOST_WIDE_INT
) 1, 8);
679 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
680 (unsigned HOST_WIDE_INT
) 1,
681 (unsigned HOST_WIDE_INT
) 1);
685 /* Let linker plugin know that this is a slim object and must be LTOed
686 even when user did not ask for it. */
687 if (flag_generate_lto
&& !flag_fat_lto_objects
)
689 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
690 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
, "__gnu_lto_slim",
691 (unsigned HOST_WIDE_INT
) 1, 8);
692 #elif defined ASM_OUTPUT_ALIGNED_COMMON
693 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_slim",
694 (unsigned HOST_WIDE_INT
) 1, 8);
696 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_slim",
697 (unsigned HOST_WIDE_INT
) 1,
698 (unsigned HOST_WIDE_INT
) 1);
702 /* Attach a special .ident directive to the end of the file to identify
703 the version of GCC which compiled this code. The format of the .ident
704 string is patterned after the ones produced by native SVR4 compilers. */
707 const char *pkg_version
= "(GNU) ";
710 if (strcmp ("(GCC) ", pkgversion_string
))
711 pkg_version
= pkgversion_string
;
713 ident_str
= ACONCAT (("GCC: ", pkg_version
, version_string
, NULL
));
714 targetm
.asm_out
.output_ident (ident_str
);
717 /* Auto profile finalization. */
718 if (flag_auto_profile
)
721 /* Invoke registered plugin callbacks. */
722 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
724 /* This must be at the end. Some target ports emit end of file directives
725 into the assembly file here, and hence we can not output anything to the
726 assembly file after this point. */
727 targetm
.asm_out
.file_end ();
729 timevar_stop (TV_PHASE_LATE_ASM
);
732 /* Print version information to FILE.
733 Each line begins with INDENT (for the case where FILE is the
734 assembler output file).
736 If SHOW_GLOBAL_STATE is true (for cc1 etc), we are within the compiler
737 proper and can print pertinent state (e.g. params and plugins).
739 If SHOW_GLOBAL_STATE is false (for use by libgccjit), we are outside the
740 compiler, and we don't hold the mutex on the compiler's global state:
741 we can't print params and plugins, since they might not be initialized,
742 or might be being manipulated by a compile running in another
746 print_version (FILE *file
, const char *indent
, bool show_global_state
)
748 static const char fmt1
[] =
750 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
752 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
755 static const char fmt2
[] =
756 N_("GMP version %s, MPFR version %s, MPC version %s\n");
757 static const char fmt3
[] =
758 N_("%s%swarning: %s header version %s differs from library version %s.\n");
759 static const char fmt4
[] =
760 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
762 #define __VERSION__ "[?]"
765 file
== stderr
? _(fmt1
) : fmt1
,
766 indent
, *indent
!= 0 ? " " : "",
767 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
768 indent
, __VERSION__
);
770 /* We need to stringify the GMP macro values. Ugh, gmp_version has
771 two string formats, "i.j.k" and "i.j" when k is zero. As of
772 gmp-4.3.0, GMP always uses the 3 number format. */
773 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
774 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3 (X)
775 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
776 #define GCC_GMP_VERSION \
777 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
778 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
779 #define GCC_GMP_STRINGIFY_VERSION \
780 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
781 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR)
783 #define GCC_GMP_STRINGIFY_VERSION \
784 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION) "." \
785 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_MINOR) "." \
786 GCC_GMP_STRINGIFY_VERSION2 (__GNU_MP_VERSION_PATCHLEVEL)
789 file
== stderr
? _(fmt2
) : fmt2
,
790 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
791 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
793 file
== stderr
? _(fmt3
) : fmt3
,
794 indent
, *indent
!= 0 ? " " : "",
795 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
796 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
798 file
== stderr
? _(fmt3
) : fmt3
,
799 indent
, *indent
!= 0 ? " " : "",
800 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
801 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
803 file
== stderr
? _(fmt3
) : fmt3
,
804 indent
, *indent
!= 0 ? " " : "",
805 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
807 if (show_global_state
)
810 file
== stderr
? _(fmt4
) : fmt4
,
811 indent
, *indent
!= 0 ? " " : "",
812 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
814 print_plugins_versions (file
, indent
);
819 print_to_asm_out_file (print_switch_type type
, const char * text
)
821 bool prepend_sep
= true;
825 case SWITCH_TYPE_LINE_END
:
826 putc ('\n', asm_out_file
);
829 case SWITCH_TYPE_LINE_START
:
830 fputs (ASM_COMMENT_START
, asm_out_file
);
831 return strlen (ASM_COMMENT_START
);
833 case SWITCH_TYPE_DESCRIPTIVE
:
834 if (ASM_COMMENT_START
[0] == 0)
837 case SWITCH_TYPE_PASSED
:
838 case SWITCH_TYPE_ENABLED
:
840 fputc (' ', asm_out_file
);
841 fputs (text
, asm_out_file
);
842 /* No need to return the length here as
843 print_single_switch has already done it. */
852 print_to_stderr (print_switch_type type
, const char * text
)
856 case SWITCH_TYPE_LINE_END
:
860 case SWITCH_TYPE_LINE_START
:
863 case SWITCH_TYPE_PASSED
:
864 case SWITCH_TYPE_ENABLED
:
868 case SWITCH_TYPE_DESCRIPTIVE
:
869 fputs (text
, stderr
);
870 /* No need to return the length here as
871 print_single_switch has already done it. */
879 /* Print an option value and return the adjusted position in the line.
880 ??? print_fn doesn't handle errors, eg disk full; presumably other
881 code will catch a disk full though. */
884 print_single_switch (print_switch_fn_type print_fn
,
886 print_switch_type type
,
889 /* The ultrix fprintf returns 0 on success, so compute the result
890 we want here since we need it for the following test. The +1
891 is for the separator character that will probably be emitted. */
892 int len
= strlen (text
) + 1;
895 && pos
+ len
> MAX_LINE
)
897 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
902 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
904 print_fn (type
, text
);
908 /* Print active target switches using PRINT_FN.
909 POS is the current cursor position and MAX is the size of a "line".
910 Each line begins with INDENT and ends with TERM.
911 Each switch is separated from the next by SEP. */
914 print_switch_values (print_switch_fn_type print_fn
)
919 /* Fill in the -frandom-seed option, if the user didn't pass it, so
920 that it can be printed below. This helps reproducibility. */
921 if (!flag_random_seed
)
924 /* Print the options as passed. */
925 pos
= print_single_switch (print_fn
, pos
,
926 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
928 for (j
= 1; j
< save_decoded_options_count
; j
++)
930 switch (save_decoded_options
[j
].opt_index
)
943 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
944 save_decoded_options
[j
].orig_option_with_args_text
);
948 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
950 /* Print the -f and -m options that have been enabled.
951 We don't handle language specific options but printing argv
953 pos
= print_single_switch (print_fn
, 0,
954 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
956 for (j
= 0; j
< cl_options_count
; j
++)
957 if (cl_options
[j
].cl_report
958 && option_enabled (j
, &global_options
) > 0)
959 pos
= print_single_switch (print_fn
, pos
,
960 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
962 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
965 /* Open assembly code output file. Do this even if -fsyntax-only is
966 on, because then the driver will have provided the name of a
967 temporary file or bit bucket for us. NAME is the file specified on
968 the command line, possibly NULL. */
970 init_asm_output (const char *name
)
972 if (name
== NULL
&& asm_file_name
== 0)
973 asm_out_file
= stdout
;
976 if (asm_file_name
== 0)
978 int len
= strlen (dump_base_name
);
979 char *dumpname
= XNEWVEC (char, len
+ 6);
981 memcpy (dumpname
, dump_base_name
, len
+ 1);
982 strip_off_ending (dumpname
, len
);
983 strcat (dumpname
, ".s");
984 asm_file_name
= dumpname
;
986 if (!strcmp (asm_file_name
, "-"))
987 asm_out_file
= stdout
;
988 else if (!canonical_filename_eq (asm_file_name
, name
)
989 || !strcmp (asm_file_name
, HOST_BIT_BUCKET
))
990 asm_out_file
= fopen (asm_file_name
, "w");
992 /* Use UNKOWN_LOCATION to prevent gcc from printing the first
993 line in the current file. */
994 fatal_error (UNKNOWN_LOCATION
,
995 "input file %qs is the same as output file",
997 if (asm_out_file
== 0)
998 fatal_error (UNKNOWN_LOCATION
,
999 "can%'t open %qs for writing: %m", asm_file_name
);
1002 if (!flag_syntax_only
)
1004 targetm
.asm_out
.file_start ();
1006 if (flag_record_gcc_switches
)
1008 if (targetm
.asm_out
.record_gcc_switches
)
1010 /* Let the target know that we are about to start recording. */
1011 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1013 /* Now record the switches. */
1014 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1015 /* Let the target know that the recording is over. */
1016 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1020 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
1023 if (flag_verbose_asm
)
1025 /* Print the list of switches in effect
1026 into the assembler file as comments. */
1027 print_version (asm_out_file
, ASM_COMMENT_START
, true);
1028 print_switch_values (print_to_asm_out_file
);
1029 putc ('\n', asm_out_file
);
1034 /* A helper function; used as the reallocator function for cpp's line
1037 realloc_for_line_map (void *ptr
, size_t len
)
1039 return ggc_realloc (ptr
, len
);
1042 /* A helper function: used as the allocator function for
1043 identifier_to_locale. */
1045 alloc_for_identifier_to_locale (size_t len
)
1047 return ggc_alloc_atomic (len
);
1050 /* Output stack usage information. */
1052 output_stack_usage (void)
1054 static bool warning_issued
= false;
1055 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
1056 const char *stack_usage_kind_str
[] = {
1061 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
1062 enum stack_usage_kind_type stack_usage_kind
;
1064 if (stack_usage
< 0)
1066 if (!warning_issued
)
1068 warning (0, "stack usage computation not supported for this target");
1069 warning_issued
= true;
1074 stack_usage_kind
= STATIC
;
1076 /* Add the maximum amount of space pushed onto the stack. */
1077 if (current_function_pushed_stack_size
> 0)
1079 stack_usage
+= current_function_pushed_stack_size
;
1080 stack_usage_kind
= DYNAMIC_BOUNDED
;
1083 /* Now on to the tricky part: dynamic stack allocation. */
1084 if (current_function_allocates_dynamic_stack_space
)
1086 if (current_function_has_unbounded_dynamic_stack_size
)
1087 stack_usage_kind
= DYNAMIC
;
1089 stack_usage_kind
= DYNAMIC_BOUNDED
;
1091 /* Add the size even in the unbounded case, this can't hurt. */
1092 stack_usage
+= current_function_dynamic_stack_size
;
1095 if (flag_stack_usage
)
1097 expanded_location loc
1098 = expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1099 /* We don't want to print the full qualified name because it can be long,
1100 so we strip the scope prefix, but we may need to deal with the suffix
1101 created by the compiler. */
1103 = strchr (IDENTIFIER_POINTER (DECL_NAME (current_function_decl
)), '.');
1105 = lang_hooks
.decl_printable_name (current_function_decl
, 2);
1108 const char *dot
= strchr (name
, '.');
1109 while (dot
&& strcasecmp (dot
, suffix
) != 0)
1112 dot
= strchr (name
, '.');
1117 const char *dot
= strrchr (name
, '.');
1122 fprintf (stack_usage_file
,
1123 "%s:%d:%d:%s\t" HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1124 lbasename (loc
.file
),
1129 stack_usage_kind_str
[stack_usage_kind
]);
1132 if (warn_stack_usage
>= 0)
1134 const location_t loc
= DECL_SOURCE_LOCATION (current_function_decl
);
1136 if (stack_usage_kind
== DYNAMIC
)
1137 warning_at (loc
, OPT_Wstack_usage_
, "stack usage might be unbounded");
1138 else if (stack_usage
> warn_stack_usage
)
1140 if (stack_usage_kind
== DYNAMIC_BOUNDED
)
1142 OPT_Wstack_usage_
, "stack usage might be %wd bytes",
1145 warning_at (loc
, OPT_Wstack_usage_
, "stack usage is %wd bytes",
1151 /* Open an auxiliary output file. */
1153 open_auxiliary_file (const char *ext
)
1158 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1159 file
= fopen (filename
, "w");
1161 fatal_error (input_location
, "can%'t open %s for writing: %m", filename
);
1166 /* Initialization of the front end environment, before command line
1167 options are parsed. Signal handlers, internationalization etc.
1168 ARGV0 is main's argv[0]. */
1170 general_init (const char *argv0
, bool init_signals
)
1174 p
= argv0
+ strlen (argv0
);
1175 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1179 xmalloc_set_program_name (progname
);
1183 /* Unlock the stdio streams. */
1184 unlock_std_streams ();
1186 gcc_init_libintl ();
1188 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1189 identifier_to_locale_free
= ggc_free
;
1191 /* Initialize the diagnostics reporting machinery, so option parsing
1192 can give warnings and errors. */
1193 diagnostic_initialize (global_dc
, N_OPTS
);
1194 /* Set a default printer. Language specific initializations will
1195 override it later. */
1196 tree_diagnostics_defaults (global_dc
);
1198 global_dc
->show_caret
1199 = global_options_init
.x_flag_diagnostics_show_caret
;
1200 global_dc
->show_option_requested
1201 = global_options_init
.x_flag_diagnostics_show_option
;
1202 global_dc
->show_column
1203 = global_options_init
.x_flag_show_column
;
1204 global_dc
->internal_error
= plugins_internal_error_function
;
1205 global_dc
->option_enabled
= option_enabled
;
1206 global_dc
->option_state
= &global_options
;
1207 global_dc
->option_name
= option_name
;
1211 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1213 signal (SIGSEGV
, crash_signal
);
1216 signal (SIGILL
, crash_signal
);
1219 signal (SIGBUS
, crash_signal
);
1222 signal (SIGABRT
, crash_signal
);
1224 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1225 signal (SIGIOT
, crash_signal
);
1228 signal (SIGFPE
, crash_signal
);
1231 /* Other host-specific signal setup. */
1232 (*host_hooks
.extra_signals
)();
1235 /* Initialize the garbage-collector, string pools and tree type hash
1239 input_location
= UNKNOWN_LOCATION
;
1240 line_table
= ggc_alloc
<line_maps
> ();
1241 linemap_init (line_table
, BUILTINS_LOCATION
);
1242 line_table
->reallocator
= realloc_for_line_map
;
1243 line_table
->round_alloc_size
= ggc_round_alloc_size
;
1246 /* Initialize register usage now so switches may override. */
1249 /* Register the language-independent parameters. */
1250 global_init_params ();
1252 /* This must be done after global_init_params but before argument
1254 init_ggc_heuristics ();
1256 /* Create the singleton holder for global state.
1257 Doing so also creates the pass manager and with it the passes. */
1258 g
= new gcc::context ();
1259 symtab
= new (ggc_cleared_alloc
<symbol_table
> ()) symbol_table ();
1261 statistics_early_init ();
1265 /* Return true if the current target supports -fsection-anchors. */
1268 target_supports_section_anchors_p (void)
1270 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1273 if (targetm
.asm_out
.output_anchor
== NULL
)
1279 /* Default the align_* variables to 1 if they're still unset, and
1280 set up the align_*_log variables. */
1282 init_alignments (void)
1284 if (align_loops
<= 0)
1286 if (align_loops_max_skip
> align_loops
)
1287 align_loops_max_skip
= align_loops
- 1;
1288 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1289 if (align_jumps
<= 0)
1291 if (align_jumps_max_skip
> align_jumps
)
1292 align_jumps_max_skip
= align_jumps
- 1;
1293 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1294 if (align_labels
<= 0)
1296 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1297 if (align_labels_max_skip
> align_labels
)
1298 align_labels_max_skip
= align_labels
- 1;
1299 if (align_functions
<= 0)
1300 align_functions
= 1;
1301 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1304 /* Process the options that have been parsed. */
1306 process_options (void)
1308 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1309 This can happen with incorrect pre-processed input. */
1310 debug_hooks
= &do_nothing_debug_hooks
;
1312 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1314 /* Allow the front end to perform consistency checks and do further
1315 initialization based on the command line options. This hook also
1316 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1317 so we can correctly initialize debug output. */
1318 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1320 /* Set default values for parameters relation to the Scalar Reduction
1321 of Aggregates passes (SRA and IP-SRA). We must do this here, rather
1322 than in opts.c:default_options_optimization as historically these
1323 tuning heuristics have been based on MOVE_RATIO, which on some
1324 targets requires other symbols from the backend. */
1325 maybe_set_param_value
1326 (PARAM_SRA_MAX_SCALARIZATION_SIZE_SPEED
,
1327 get_move_ratio (true) * UNITS_PER_WORD
,
1328 global_options
.x_param_values
, global_options_set
.x_param_values
);
1329 maybe_set_param_value
1330 (PARAM_SRA_MAX_SCALARIZATION_SIZE_SIZE
,
1331 get_move_ratio (false) * UNITS_PER_WORD
,
1332 global_options
.x_param_values
, global_options_set
.x_param_values
);
1334 /* Some machines may reject certain combinations of options. */
1335 targetm
.target_option
.override ();
1337 /* Avoid any informative notes in the second run of -fcompare-debug. */
1338 if (flag_compare_debug
)
1339 diagnostic_inhibit_notes (global_dc
);
1341 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1343 warning (OPT_fsection_anchors
,
1344 "this target does not support %qs", "-fsection-anchors");
1345 flag_section_anchors
= 0;
1348 if (flag_short_enums
== 2)
1349 flag_short_enums
= targetm
.default_short_enums ();
1351 /* Set aux_base_name if not already set. */
1354 else if (main_input_filename
)
1356 char *name
= xstrdup (lbasename (main_input_filename
));
1358 strip_off_ending (name
, strlen (name
));
1359 aux_base_name
= name
;
1362 aux_base_name
= "gccaux";
1366 || flag_graphite_identity
1368 || flag_loop_interchange
1369 || flag_loop_strip_mine
1370 || flag_loop_parallelize_all
1371 || flag_loop_unroll_jam
)
1372 sorry ("Graphite loop optimizations cannot be used (ISL is not available)"
1373 "(-fgraphite, -fgraphite-identity, -floop-block, "
1374 "-floop-interchange, -floop-strip-mine, -floop-parallelize-all, "
1375 "-floop-unroll-and-jam, and -ftree-loop-linear)");
1378 if (flag_check_pointer_bounds
)
1380 if (targetm
.chkp_bound_mode () == VOIDmode
)
1382 error ("-fcheck-pointer-bounds is not supported for this target");
1383 flag_check_pointer_bounds
= 0;
1386 if (flag_sanitize
& SANITIZE_ADDRESS
)
1388 error ("-fcheck-pointer-bounds is not supported with "
1389 "Address Sanitizer");
1390 flag_check_pointer_bounds
= 0;
1394 /* One region RA really helps to decrease the code size. */
1395 if (flag_ira_region
== IRA_REGION_AUTODETECT
)
1397 = optimize_size
|| !optimize
? IRA_REGION_ONE
: IRA_REGION_MIXED
;
1399 if (!abi_version_at_least (2))
1401 /* -fabi-version=1 support was removed after GCC 4.9. */
1402 error ("%<-fabi-version=1%> is no longer supported");
1403 flag_abi_version
= 2;
1406 /* Unrolling all loops implies that standard loop unrolling must also
1408 if (flag_unroll_all_loops
)
1409 flag_unroll_loops
= 1;
1411 /* web and rename-registers help when run after loop unrolling. */
1412 if (flag_web
== AUTODETECT_VALUE
)
1413 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1415 if (flag_rename_registers
== AUTODETECT_VALUE
)
1416 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1418 if (flag_non_call_exceptions
)
1419 flag_asynchronous_unwind_tables
= 1;
1420 if (flag_asynchronous_unwind_tables
)
1421 flag_unwind_tables
= 1;
1423 if (flag_value_profile_transformations
)
1424 flag_profile_values
= 1;
1426 /* Warn about options that are not supported on this machine. */
1427 #ifndef INSN_SCHEDULING
1428 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1429 warning (0, "instruction scheduling not supported on this target machine");
1432 if (flag_delayed_branch
)
1433 warning (0, "this target machine does not have delayed branches");
1436 user_label_prefix
= USER_LABEL_PREFIX
;
1437 if (flag_leading_underscore
!= -1)
1439 /* If the default prefix is more complicated than "" or "_",
1440 issue a warning and ignore this option. */
1441 if (user_label_prefix
[0] == 0 ||
1442 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1444 user_label_prefix
= flag_leading_underscore
? "_" : "";
1447 warning (0, "-f%sleading-underscore not supported on this target machine",
1448 flag_leading_underscore
? "" : "no-");
1451 /* If we are in verbose mode, write out the version and maybe all the
1452 option flags in use. */
1455 print_version (stderr
, "", true);
1457 print_switch_values (print_to_stderr
);
1460 if (flag_syntax_only
)
1462 write_symbols
= NO_DEBUG
;
1468 if (debug_info_level
== DINFO_LEVEL_NONE
)
1470 debug_info_level
= DINFO_LEVEL_NORMAL
;
1472 if (write_symbols
== NO_DEBUG
)
1473 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1476 debug_info_level
= DINFO_LEVEL_NONE
;
1479 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1481 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1484 error ("could not open final insn dump file %qs: %m",
1485 flag_dump_final_insns
);
1486 flag_dump_final_insns
= NULL
;
1488 else if (fclose (final_output
))
1490 error ("could not close zeroed insn dump file %qs: %m",
1491 flag_dump_final_insns
);
1492 flag_dump_final_insns
= NULL
;
1496 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1498 if (debug_info_level
== DINFO_LEVEL_NONE
)
1499 write_symbols
= NO_DEBUG
;
1501 if (write_symbols
== NO_DEBUG
)
1503 #if defined(DBX_DEBUGGING_INFO)
1504 else if (write_symbols
== DBX_DEBUG
)
1505 debug_hooks
= &dbx_debug_hooks
;
1507 #if defined(XCOFF_DEBUGGING_INFO)
1508 else if (write_symbols
== XCOFF_DEBUG
)
1509 debug_hooks
= &xcoff_debug_hooks
;
1511 #ifdef SDB_DEBUGGING_INFO
1512 else if (write_symbols
== SDB_DEBUG
)
1513 debug_hooks
= &sdb_debug_hooks
;
1515 #ifdef DWARF2_DEBUGGING_INFO
1516 else if (write_symbols
== DWARF2_DEBUG
)
1517 debug_hooks
= &dwarf2_debug_hooks
;
1519 #ifdef VMS_DEBUGGING_INFO
1520 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1521 debug_hooks
= &vmsdbg_debug_hooks
;
1524 error ("target system does not support the %qs debug format",
1525 debug_type_names
[write_symbols
]);
1527 /* We know which debug output will be used so we can set flag_var_tracking
1528 and flag_var_tracking_uninit if the user has not specified them. */
1529 if (debug_info_level
< DINFO_LEVEL_NORMAL
1530 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1532 if (flag_var_tracking
== 1
1533 || flag_var_tracking_uninit
== 1)
1535 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1536 warning (0, "variable tracking requested, but useless unless "
1537 "producing debug info");
1539 warning (0, "variable tracking requested, but not supported "
1540 "by this debug format");
1542 flag_var_tracking
= 0;
1543 flag_var_tracking_uninit
= 0;
1546 /* The debug hooks are used to implement -fdump-go-spec because it
1547 gives a simple and stable API for all the information we need to
1549 if (flag_dump_go_spec
!= NULL
)
1550 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1552 /* If the user specifically requested variable tracking with tagging
1553 uninitialized variables, we need to turn on variable tracking.
1554 (We already determined above that variable tracking is feasible.) */
1555 if (flag_var_tracking_uninit
== 1)
1556 flag_var_tracking
= 1;
1558 if (flag_var_tracking
== AUTODETECT_VALUE
)
1559 flag_var_tracking
= optimize
>= 1;
1561 if (flag_var_tracking_uninit
== AUTODETECT_VALUE
)
1562 flag_var_tracking_uninit
= flag_var_tracking
;
1564 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1565 flag_var_tracking_assignments
= flag_var_tracking
1566 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1568 if (flag_var_tracking_assignments_toggle
)
1569 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1571 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1572 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1574 if (flag_var_tracking_assignments
1575 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1576 warning (0, "var-tracking-assignments changes selective scheduling");
1578 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1579 #ifdef HAVE_conditional_move
1580 flag_tree_cselim
= 1;
1582 flag_tree_cselim
= 0;
1585 /* If auxiliary info generation is desired, open the output file.
1586 This goes in the same directory as the source file--unlike
1587 all the other output files. */
1588 if (flag_gen_aux_info
)
1590 aux_info_file
= fopen (aux_info_file_name
, "w");
1591 if (aux_info_file
== 0)
1592 fatal_error (input_location
, "can%'t open %s: %m", aux_info_file_name
);
1595 if (!targetm_common
.have_named_sections
)
1597 if (flag_function_sections
)
1599 warning (0, "-ffunction-sections not supported for this target");
1600 flag_function_sections
= 0;
1602 if (flag_data_sections
)
1604 warning (0, "-fdata-sections not supported for this target");
1605 flag_data_sections
= 0;
1609 #ifndef HAVE_prefetch
1610 if (flag_prefetch_loop_arrays
> 0)
1612 warning (0, "-fprefetch-loop-arrays not supported for this target");
1613 flag_prefetch_loop_arrays
= 0;
1616 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1618 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1619 flag_prefetch_loop_arrays
= 0;
1623 /* This combination of options isn't handled for i386 targets and doesn't
1624 make much sense anyway, so don't allow it. */
1625 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1627 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1628 flag_prefetch_loop_arrays
= 0;
1631 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1632 if (flag_signaling_nans
)
1633 flag_trapping_math
= 1;
1635 /* We cannot reassociate if we want traps or signed zeros. */
1636 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1638 warning (0, "-fassociative-math disabled; other options take precedence");
1639 flag_associative_math
= 0;
1642 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1643 if (flag_cx_limited_range
)
1644 flag_complex_method
= 0;
1646 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1647 if (flag_cx_fortran_rules
)
1648 flag_complex_method
= 1;
1650 /* Targets must be able to place spill slots at lower addresses. If the
1651 target already uses a soft frame pointer, the transition is trivial. */
1652 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1654 warning (0, "-fstack-protector not supported for this target");
1655 flag_stack_protect
= 0;
1657 if (!flag_stack_protect
)
1658 warn_stack_protect
= 0;
1660 /* Address Sanitizer needs porting to each target architecture. */
1662 if ((flag_sanitize
& SANITIZE_ADDRESS
)
1663 && !FRAME_GROWS_DOWNWARD
)
1666 "-fsanitize=address and -fsanitize=kernel-address "
1667 "are not supported for this target");
1668 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1671 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
1672 && targetm
.asan_shadow_offset
== NULL
)
1674 warning (0, "-fsanitize=address not supported for this target");
1675 flag_sanitize
&= ~SANITIZE_ADDRESS
;
1678 /* Do not use IPA optimizations for register allocation if profiler is active
1679 or port does not emit prologue and epilogue as RTL. */
1680 if (profile_flag
|| !HAVE_prologue
|| !HAVE_epilogue
)
1683 /* Enable -Werror=coverage-mismatch when -Werror and -Wno-error
1684 have not been set. */
1685 if (!global_options_set
.x_warnings_are_errors
1686 && warn_coverage_mismatch
1687 && (global_dc
->classify_diagnostic
[OPT_Wcoverage_mismatch
] ==
1689 diagnostic_classify_diagnostic (global_dc
, OPT_Wcoverage_mismatch
,
1690 DK_ERROR
, UNKNOWN_LOCATION
);
1692 /* Save the current optimization options. */
1693 optimization_default_node
= build_optimization_node (&global_options
);
1694 optimization_current_node
= optimization_default_node
;
1696 /* Please don't change global_options after this point, those changes won't
1697 be reflected in optimization_{default,current}_node. */
1700 /* This function can be called multiple times to reinitialize the compiler
1701 back end when register classes or instruction sets have changed,
1702 before each function. */
1704 backend_init_target (void)
1706 /* Initialize alignment variables. */
1709 /* This depends on stack_pointer_rtx. */
1710 init_fake_stack_mems ();
1712 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1714 init_alias_target ();
1716 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1719 /* Depends on the enabled attribute. */
1722 /* The following initialization functions need to generate rtl, so
1723 provide a dummy function context for them. */
1724 init_dummy_function_start ();
1726 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1727 on a mode change. */
1729 init_lower_subreg ();
1732 init_expr_target ();
1735 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1736 after a mode change as well. */
1737 caller_save_initialized_p
= false;
1739 expand_dummy_function_end ();
1742 /* Initialize the compiler back end. This function is called only once,
1743 when starting the compiler. */
1750 init_inline_once ();
1751 init_varasm_once ();
1752 save_register_info ();
1754 /* Middle end needs this initialization for default mem attributes
1755 used by early calls to make_decl_rtl. */
1758 /* Middle end needs this initialization for mode tables used to assign
1759 modes to vector variables. */
1763 /* Initialize excess precision settings. */
1765 init_excess_precision (void)
1767 /* Adjust excess precision handling based on the target options. If
1768 the front end cannot handle it, flag_excess_precision_cmdline
1769 will already have been set accordingly in the post_options
1771 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1772 flag_excess_precision
= flag_excess_precision_cmdline
;
1773 if (flag_unsafe_math_optimizations
)
1774 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1775 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1777 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1778 switch (flt_eval_method
)
1782 /* Either the target acts unpredictably (-1) or has all the
1783 operations required not to have excess precision (0). */
1784 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1788 /* In these cases, predictable excess precision makes
1792 /* Any other implementation-defined FLT_EVAL_METHOD values
1793 require the compiler to handle the associated excess
1794 precision rules in excess_precision_type. */
1800 /* Initialize things that are both lang-dependent and target-dependent.
1801 This function can be called more than once if target parameters change. */
1803 lang_dependent_init_target (void)
1805 /* This determines excess precision settings. */
1806 init_excess_precision ();
1808 /* This creates various _DECL nodes, so needs to be called after the
1809 front end is initialized. It also depends on the HAVE_xxx macros
1810 generated from the target machine description. */
1813 gcc_assert (!this_target_rtl
->target_specific_initialized
);
1816 /* Perform initializations that are lang-dependent or target-dependent.
1817 but matters only for late optimizations and RTL generation. */
1819 static int rtl_initialized
;
1822 initialize_rtl (void)
1824 /* Initialization done just once per compilation, but delayed
1825 till code generation. */
1826 if (!rtl_initialized
)
1828 rtl_initialized
= true;
1830 /* Target specific RTL backend initialization. */
1831 if (!this_target_rtl
->target_specific_initialized
)
1833 backend_init_target ();
1834 this_target_rtl
->target_specific_initialized
= true;
1838 /* Language-dependent initialization. Returns nonzero on success. */
1840 lang_dependent_init (const char *name
)
1842 location_t save_loc
= input_location
;
1843 if (dump_base_name
== 0)
1844 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1846 /* Other front-end initialization. */
1847 input_location
= BUILTINS_LOCATION
;
1848 if (lang_hooks
.init () == 0)
1850 input_location
= save_loc
;
1854 init_asm_output (name
);
1856 /* If stack usage information is desired, open the output file. */
1857 if (flag_stack_usage
)
1858 stack_usage_file
= open_auxiliary_file ("su");
1861 /* This creates various _DECL nodes, so needs to be called after the
1862 front end is initialized. */
1865 /* Do the target-specific parts of the initialization. */
1866 lang_dependent_init_target ();
1870 /* If dbx symbol table desired, initialize writing it and output the
1871 predefined types. */
1872 timevar_push (TV_SYMOUT
);
1874 /* Now we have the correct original filename, we can initialize
1876 (*debug_hooks
->init
) (name
);
1878 timevar_pop (TV_SYMOUT
);
1885 /* Reinitialize everything when target parameters, such as register usage,
1888 target_reinit (void)
1890 struct rtl_data saved_x_rtl
;
1891 rtx
*saved_regno_reg_rtx
;
1892 tree saved_optimization_current_node
;
1893 struct target_optabs
*saved_this_fn_optabs
;
1895 /* Temporarily switch to the default optimization node, so that
1896 *this_target_optabs is set to the default, not reflecting
1897 whatever a previous function used for the optimize
1899 saved_optimization_current_node
= optimization_current_node
;
1900 saved_this_fn_optabs
= this_fn_optabs
;
1901 if (saved_optimization_current_node
!= optimization_default_node
)
1903 optimization_current_node
= optimization_default_node
;
1904 cl_optimization_restore
1906 TREE_OPTIMIZATION (optimization_default_node
));
1908 this_fn_optabs
= this_target_optabs
;
1910 /* Save *crtl and regno_reg_rtx around the reinitialization
1911 to allow target_reinit being called even after prepare_function_start. */
1912 saved_regno_reg_rtx
= regno_reg_rtx
;
1913 if (saved_regno_reg_rtx
)
1915 saved_x_rtl
= *crtl
;
1916 memset (crtl
, '\0', sizeof (*crtl
));
1917 regno_reg_rtx
= NULL
;
1920 this_target_rtl
->target_specific_initialized
= false;
1922 /* This initializes hard_frame_pointer, and calls init_reg_modes_target()
1923 to initialize reg_raw_mode[]. */
1926 /* This invokes target hooks to set fixed_reg[] etc, which is
1930 /* Reinitialize lang-dependent parts. */
1931 lang_dependent_init_target ();
1933 /* Restore the original optimization node. */
1934 if (saved_optimization_current_node
!= optimization_default_node
)
1936 optimization_current_node
= saved_optimization_current_node
;
1937 cl_optimization_restore (&global_options
,
1938 TREE_OPTIMIZATION (optimization_current_node
));
1940 this_fn_optabs
= saved_this_fn_optabs
;
1942 /* Restore regno_reg_rtx at the end, as free_after_compilation from
1943 expand_dummy_function_end clears it. */
1944 if (saved_regno_reg_rtx
)
1946 *crtl
= saved_x_rtl
;
1947 regno_reg_rtx
= saved_regno_reg_rtx
;
1948 saved_regno_reg_rtx
= NULL
;
1953 dump_memory_report (bool final
)
1955 dump_line_table_statistics ();
1956 ggc_print_statistics ();
1957 stringpool_statistics ();
1958 dump_tree_statistics ();
1959 dump_gimple_statistics ();
1960 dump_rtx_statistics ();
1961 dump_alloc_pool_statistics ();
1962 dump_bitmap_statistics ();
1963 dump_vec_loc_statistics ();
1964 dump_ggc_loc_statistics (final
);
1965 dump_alias_stats (stderr
);
1966 dump_pta_stats (stderr
);
1969 /* Clean up: close opened files, etc. */
1972 finalize (bool no_backend
)
1974 /* Close the dump files. */
1975 if (flag_gen_aux_info
)
1977 fclose (aux_info_file
);
1979 unlink (aux_info_file_name
);
1982 /* Close non-debugging input and output files. Take special care to note
1983 whether fclose returns an error, since the pages might still be on the
1984 buffer chain while the file is open. */
1988 if (ferror (asm_out_file
) != 0)
1989 fatal_error (input_location
, "error writing to %s: %m", asm_file_name
);
1990 if (fclose (asm_out_file
) != 0)
1991 fatal_error (input_location
, "error closing %s: %m", asm_file_name
);
1994 if (stack_usage_file
)
1995 fclose (stack_usage_file
);
2001 g
->get_passes ()->finish_optimization_passes ();
2007 dump_memory_report (true);
2010 dump_profile_report ();
2012 /* Language-specific end of compilation actions. */
2013 lang_hooks
.finish ();
2017 standard_type_bitsize (int bitsize
)
2019 /* As a special exception, we always want __int128 enabled if possible. */
2022 if (bitsize
== CHAR_TYPE_SIZE
2023 || bitsize
== SHORT_TYPE_SIZE
2024 || bitsize
== INT_TYPE_SIZE
2025 || bitsize
== LONG_TYPE_SIZE
2026 || bitsize
== LONG_LONG_TYPE_SIZE
)
2031 /* Initialize the compiler, and compile the input file. */
2037 /* Don't do any more if an error has already occurred. */
2042 timevar_start (TV_PHASE_SETUP
);
2044 /* This must be run always, because it is needed to compute the FP
2045 predefined macros, such as __LDBL_MAX__, for targets using non
2046 default FP formats. */
2047 init_adjust_machine_modes ();
2048 init_derived_machine_modes ();
2050 /* This must happen after the backend has a chance to process
2051 command line options, but before the parsers are
2053 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
2054 if (targetm
.scalar_mode_supported_p (int_n_data
[i
].m
)
2055 && ! standard_type_bitsize (int_n_data
[i
].bitsize
))
2056 int_n_enabled_p
[i
] = true;
2058 int_n_enabled_p
[i
] = false;
2060 /* Set up the back-end if requested. */
2064 /* Language-dependent initialization. Returns true on success. */
2065 if (lang_dependent_init (main_input_filename
))
2067 /* Initialize yet another pass. */
2069 ggc_protect_identifiers
= true;
2071 symtab
->initialize ();
2072 init_final (main_input_filename
);
2073 coverage_init (aux_base_name
);
2075 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
2077 timevar_stop (TV_PHASE_SETUP
);
2083 timevar_stop (TV_PHASE_SETUP
);
2086 timevar_start (TV_PHASE_FINALIZE
);
2088 finalize (no_backend
);
2090 timevar_stop (TV_PHASE_FINALIZE
);
2094 toplev::toplev (bool use_TV_TOTAL
, bool init_signals
)
2095 : m_use_TV_TOTAL (use_TV_TOTAL
),
2096 m_init_signals (init_signals
)
2098 if (!m_use_TV_TOTAL
)
2106 g_timer
->stop (TV_TOTAL
);
2107 g_timer
->print (stderr
);
2112 toplev::start_timevars ()
2114 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2117 timevar_start (TV_TOTAL
);
2120 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2121 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2122 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2124 It is not safe to call this function more than once. */
2127 toplev::main (int argc
, char **argv
)
2129 /* Parsing and gimplification sometimes need quite large stack.
2130 Increase stack size limits if possible. */
2131 stack_limit_increase (64 * 1024 * 1024);
2133 expandargv (&argc
, &argv
);
2135 /* Initialization of GCC's environment, and diagnostics. */
2136 general_init (argv
[0], m_init_signals
);
2138 /* One-off initialization of options that does not need to be
2139 repeated when options are added for particular functions. */
2140 init_options_once ();
2142 /* Initialize global options structures; this must be repeated for
2143 each structure used for parsing options. */
2144 init_options_struct (&global_options
, &global_options_set
);
2145 lang_hooks
.init_options_struct (&global_options
);
2147 /* Convert the options to an array. */
2148 decode_cmdline_options_to_array_default_mask (argc
,
2149 CONST_CAST2 (const char **,
2151 &save_decoded_options
,
2152 &save_decoded_options_count
);
2154 /* Perform language-specific options initialization. */
2155 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2157 /* Parse the options and do minimal processing; basically just
2158 enough to default flags appropriately. */
2159 decode_options (&global_options
, &global_options_set
,
2160 save_decoded_options
, save_decoded_options_count
,
2161 UNKNOWN_LOCATION
, global_dc
);
2163 handle_common_deferred_options ();
2167 initialize_plugins ();
2170 print_version (stderr
, "", true);
2173 print_plugins_help (stderr
, "");
2175 /* Exit early if we can (e.g. -help). */
2176 if (!exit_after_options
)
2183 if (warningcount
|| errorcount
|| werrorcount
)
2184 print_ignored_options ();
2186 /* Invoke registered plugin callbacks if any. Some plugins could
2187 emit some diagnostics here. */
2188 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2190 diagnostic_finish (global_dc
);
2192 finalize_plugins ();
2193 location_adhoc_data_fini (line_table
);
2194 if (seen_error () || werrorcount
)
2195 return (FATAL_EXIT_CODE
);
2197 return (SUCCESS_EXIT_CODE
);
2200 /* For those that want to, this function aims to clean up enough state that
2201 you can call toplev::main again. */
2203 toplev::finalize (void)
2205 rtl_initialized
= false;
2206 this_target_rtl
->target_specific_initialized
= false;
2208 /* Needs to be called before cgraph_c_finalize since it uses symtab. */
2209 ipa_reference_c_finalize ();
2211 cgraph_c_finalize ();
2212 cgraphunit_c_finalize ();
2213 dwarf2out_c_finalize ();
2215 ipa_cp_c_finalize ();
2216 ira_costs_c_finalize ();
2217 params_c_finalize ();
2219 finalize_options_struct (&global_options
);
2220 finalize_options_struct (&global_options_set
);
2222 XDELETEVEC (save_decoded_options
);
2224 /* Clean up the context (and pass_manager etc). */
2228 obstack_free (&opts_obstack
, NULL
);