1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
29 #include "coretypes.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"
49 #include "basic-block.h"
55 #include "diagnostic.h"
56 #include "tree-diagnostic.h"
57 #include "tree-pretty-print.h"
61 #include "dwarf2asm.h"
62 #include "integrate.h"
65 #include "langhooks.h"
66 #include "cfglayout.h"
68 #include "hosthooks.h"
71 #include "opts-diagnostic.h"
73 #include "value-prof.h"
74 #include "alloc-pool.h"
75 #include "tree-mudflap.h"
76 #include "tree-pass.h"
78 #include "tree-ssa-alias.h"
81 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
82 #include "dwarf2out.h"
85 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
89 #ifdef SDB_DEBUGGING_INFO
93 #ifdef XCOFF_DEBUGGING_INFO
94 #include "xcoffout.h" /* Needed for external data
95 declarations for e.g. AIX 4.x. */
98 static void general_init (const char *);
99 static void do_compile (void);
100 static void process_options (void);
101 static void backend_init (void);
102 static int lang_dependent_init (const char *);
103 static void init_asm_output (const char *);
104 static void finalize (bool);
106 static void crash_signal (int) ATTRIBUTE_NORETURN
;
107 static void compile_file (void);
109 /* True if we don't need a backend (e.g. preprocessing only). */
110 static bool no_backend
;
112 /* Length of line when printing switch values. */
115 /* Decoded options, and number of such options. */
116 struct cl_decoded_option
*save_decoded_options
;
117 unsigned int save_decoded_options_count
;
119 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
120 to optimize in process_options (). */
121 #define AUTODETECT_VALUE 2
123 /* Debug hooks - dependent upon command line options. */
125 const struct gcc_debug_hooks
*debug_hooks
;
127 /* True if this is the lto front end. This is used to disable
128 gimple generation and lowering passes that are normally run on the
129 output of a front end. These passes must be bypassed for lto since
130 they have already been done before the gimple was written. */
132 bool in_lto_p
= false;
134 /* The FUNCTION_DECL for the function currently being compiled,
135 or 0 if between functions. */
136 tree current_function_decl
;
138 /* Set to the FUNC_BEGIN label of the current function, or NULL
140 const char * current_function_func_begin_label
;
142 /* A random sequence of characters, unless overridden by user. */
143 static const char *flag_random_seed
;
145 /* A local time stamp derived from the time of compilation. It will be
146 zero if the system cannot provide a time. It will be -1u, if the
147 user has specified a particular random seed. */
152 /* Generate code for GNU or NeXT Objective-C runtime environment. */
154 #ifdef NEXT_OBJC_RUNTIME
155 int flag_next_runtime
= 1;
157 int flag_next_runtime
= 0;
160 /* Nonzero means make permerror produce warnings instead of errors. */
162 int flag_permissive
= 0;
164 /* When non-NULL, indicates that whenever space is allocated on the
165 stack, the resulting stack pointer must not pass this
166 address---that is, for stacks that grow downward, the stack pointer
167 must always be greater than or equal to this address; for stacks
168 that grow upward, the stack pointer must be less than this address.
169 At present, the rtx may be either a REG or a SYMBOL_REF, although
170 the support provided depends on the backend. */
173 /* True if the user has tagged the function with the 'section'
176 bool user_defined_section_attribute
= false;
178 struct target_flag_state default_target_flag_state
;
179 #if SWITCHABLE_TARGET
180 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
182 #define this_target_flag_state (&default_target_flag_state)
187 const char *const string
;
191 lang_independent_options
;
193 /* The user symbol prefix after having resolved same. */
194 const char *user_label_prefix
;
196 static const param_info lang_independent_params
[] = {
197 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
198 { OPTION, DEFAULT, MIN, MAX, HELP },
199 #include "params.def"
201 { NULL
, 0, 0, 0, NULL
}
204 /* Output files for assembler code (real compiler output)
205 and debugging dumps. */
209 FILE *stack_usage_file
= NULL
;
210 FILE *dump_file
= NULL
;
211 const char *dump_file_name
;
213 /* The current working directory of a translation. It's generally the
214 directory from which compilation was initiated, but a preprocessed
215 file may specify the original directory in which it was
218 static const char *src_pwd
;
220 /* Initialize src_pwd with the given string, and return true. If it
221 was already initialized, return false. As a special case, it may
222 be called with a NULL argument to test whether src_pwd has NOT been
226 set_src_pwd (const char *pwd
)
230 if (strcmp (src_pwd
, pwd
) == 0)
236 src_pwd
= xstrdup (pwd
);
240 /* Return the directory from which the translation unit was initiated,
241 in case set_src_pwd() was not called before to assign it a
257 /* Called when the start of a function definition is parsed,
258 this function prints on stderr the name of the function. */
260 announce_function (tree decl
)
264 if (rtl_dump_and_exit
)
265 fprintf (stderr
, "%s ",
266 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
268 fprintf (stderr
, " %s",
269 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
271 pp_needs_newline (global_dc
->printer
) = true;
272 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
276 /* Initialize local_tick with the time of day, or -1 if
277 flag_random_seed is set. */
280 init_local_tick (void)
282 if (!flag_random_seed
)
284 /* Get some more or less random data. */
285 #ifdef HAVE_GETTIMEOFDAY
289 gettimeofday (&tv
, NULL
);
290 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
294 time_t now
= time (NULL
);
296 if (now
!= (time_t)-1)
297 local_tick
= (unsigned) now
;
305 /* Set up a default flag_random_seed and local_tick, unless the user
306 already specified one. Must be called after init_local_tick. */
309 init_random_seed (void)
311 unsigned HOST_WIDE_INT value
;
312 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
314 value
= local_tick
^ getpid ();
316 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
317 flag_random_seed
= random_seed
;
320 /* Obtain the random_seed string. Unless NOINIT, initialize it if
321 it's not provided in the command line. */
324 get_random_seed (bool noinit
)
326 if (!flag_random_seed
&& !noinit
)
328 return flag_random_seed
;
331 /* Modify the random_seed string to VAL. Return its previous
335 set_random_seed (const char *val
)
337 const char *old
= flag_random_seed
;
338 flag_random_seed
= val
;
342 /* Handler for fatal signals, such as SIGSEGV. These are transformed
343 into ICE messages, which is much more user friendly. In case the
344 error printer crashes, reset the signal to prevent infinite recursion. */
347 crash_signal (int signo
)
349 signal (signo
, SIG_DFL
);
351 /* If we crashed while processing an ASM statement, then be a little more
352 graceful. It's most likely the user's fault. */
353 if (this_is_asm_operands
)
355 output_operand_lossage ("unrecoverable error");
356 exit (FATAL_EXIT_CODE
);
359 internal_error ("%s", strsignal (signo
));
362 /* A subroutine of wrapup_global_declarations. We've come to the end of
363 the compilation unit. All deferred variables should be undeferred,
364 and all incomplete decls should be finalized. */
367 wrapup_global_declaration_1 (tree decl
)
369 /* We're not deferring this any longer. Assignment is conditional to
370 avoid needlessly dirtying PCH pages. */
371 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
372 && DECL_DEFER_OUTPUT (decl
) != 0)
373 DECL_DEFER_OUTPUT (decl
) = 0;
375 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
376 lang_hooks
.finish_incomplete_decl (decl
);
379 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
380 needs to be output. Return true if it is output. */
383 wrapup_global_declaration_2 (tree decl
)
385 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
388 /* Don't write out static consts, unless we still need them.
390 We also keep static consts if not optimizing (for debugging),
391 unless the user specified -fno-keep-static-consts.
392 ??? They might be better written into the debug information.
393 This is possible when using DWARF.
395 A language processor that wants static constants to be always
396 written out (even if it is not used) is responsible for
397 calling rest_of_decl_compilation itself. E.g. the C front-end
398 calls rest_of_decl_compilation from finish_decl.
399 One motivation for this is that is conventional in some
400 environments to write things like:
401 static const char rcsid[] = "... version string ...";
402 intending to force the string to be in the executable.
404 A language processor that would prefer to have unneeded
405 static constants "optimized away" would just defer writing
406 them out until here. E.g. C++ does this, because static
407 constants are often defined in header files.
409 ??? A tempting alternative (for both C and C++) would be
410 to force a constant to be written if and only if it is
411 defined in a main file, as opposed to an include file. */
413 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
415 struct varpool_node
*node
;
417 node
= varpool_get_node (decl
);
419 if (!node
&& flag_ltrans
)
421 else if (node
&& node
->finalized
)
423 else if (node
&& node
->alias
)
425 else if (!cgraph_global_info_ready
427 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
429 else if (node
&& node
->needed
)
431 else if (DECL_COMDAT (decl
))
433 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
434 && (optimize
|| !flag_keep_static_consts
435 || DECL_ARTIFICIAL (decl
)))
440 rest_of_decl_compilation (decl
, 1, 1);
448 /* Do any final processing required for the declarations in VEC, of
449 which there are LEN. We write out inline functions and variables
450 that have been deferred until this point, but which are required.
451 Returns nonzero if anything was put out. */
454 wrapup_global_declarations (tree
*vec
, int len
)
456 bool reconsider
, output_something
= false;
459 for (i
= 0; i
< len
; i
++)
460 wrapup_global_declaration_1 (vec
[i
]);
462 /* Now emit any global variables or functions that we have been
463 putting off. We need to loop in case one of the things emitted
464 here references another one which comes earlier in the list. */
468 for (i
= 0; i
< len
; i
++)
469 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
471 output_something
= true;
475 return output_something
;
478 /* A subroutine of check_global_declarations. Issue appropriate warnings
479 for the global declaration DECL. */
482 check_global_declaration_1 (tree decl
)
484 /* Warn about any function declared static but not defined. We don't
485 warn about variables, because many programs have static variables
486 that exist only to get some text into the object file. */
487 if (TREE_CODE (decl
) == FUNCTION_DECL
488 && DECL_INITIAL (decl
) == 0
489 && DECL_EXTERNAL (decl
)
490 && ! DECL_ARTIFICIAL (decl
)
491 && ! TREE_NO_WARNING (decl
)
492 && ! TREE_PUBLIC (decl
)
493 && (warn_unused_function
494 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
496 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
497 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
499 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
500 /* This symbol is effectively an "extern" declaration now. */
501 TREE_PUBLIC (decl
) = 1;
502 assemble_external (decl
);
505 /* Warn about static fns or vars defined but not used. */
506 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
507 /* We don't warn about "static const" variables because the
508 "rcs_id" idiom uses that construction. */
509 || (warn_unused_variable
510 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
511 && ! DECL_IN_SYSTEM_HEADER (decl
)
512 && ! TREE_USED (decl
)
513 /* The TREE_USED bit for file-scope decls is kept in the identifier,
514 to handle multiple external decls in different scopes. */
515 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
516 && ! DECL_EXTERNAL (decl
)
517 && ! TREE_PUBLIC (decl
)
518 /* A volatile variable might be used in some non-obvious way. */
519 && ! TREE_THIS_VOLATILE (decl
)
520 /* Global register variables must be declared to reserve them. */
521 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
522 /* Otherwise, ask the language. */
523 && lang_hooks
.decls
.warn_unused_global (decl
))
524 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
525 ? OPT_Wunused_function
526 : OPT_Wunused_variable
,
527 "%q+D defined but not used", decl
);
530 /* Issue appropriate warnings for the global declarations in VEC (of
531 which there are LEN). */
534 check_global_declarations (tree
*vec
, int len
)
538 for (i
= 0; i
< len
; i
++)
539 check_global_declaration_1 (vec
[i
]);
542 /* Emit debugging information for all global declarations in VEC. */
545 emit_debug_global_declarations (tree
*vec
, int len
)
549 /* Avoid confusing the debug information machinery when there are errors. */
553 timevar_push (TV_SYMOUT
);
554 for (i
= 0; i
< len
; i
++)
555 debug_hooks
->global_decl (vec
[i
]);
556 timevar_pop (TV_SYMOUT
);
559 /* Compile an entire translation unit. Write a file of assembly
560 output and various debugging dumps. */
565 /* Initialize yet another pass. */
567 ggc_protect_identifiers
= true;
570 init_final (main_input_filename
);
571 coverage_init (aux_base_name
);
573 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
575 timevar_push (TV_PARSE
);
577 /* Call the parser, which parses the entire file (calling
578 rest_of_compilation for each function). */
579 lang_hooks
.parse_file ();
581 /* Compilation is now finished except for writing
582 what's left of the symbol table output. */
583 timevar_pop (TV_PARSE
);
585 if (flag_syntax_only
|| flag_wpa
)
588 ggc_protect_identifiers
= false;
590 /* This must also call cgraph_finalize_compilation_unit. */
591 lang_hooks
.decls
.final_write_globals ();
596 varpool_assemble_pending_decls ();
599 /* Likewise for mudflap static object registrations. */
601 mudflap_finish_file ();
603 output_shared_constant_pool ();
604 output_object_blocks ();
606 /* Write out any pending weak symbol declarations. */
609 /* This must be at the end before unwind and debug info.
610 Some target ports emit PIC setup thunks here. */
611 targetm
.asm_out
.code_end ();
613 /* Do dbx symbols. */
614 timevar_push (TV_SYMOUT
);
616 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
617 if (dwarf2out_do_frame ())
618 dwarf2out_frame_finish ();
621 (*debug_hooks
->finish
) (main_input_filename
);
622 timevar_pop (TV_SYMOUT
);
624 /* Output some stuff at end of file if nec. */
626 dw2_output_indirect_constants ();
628 /* Flush any pending external directives. */
629 process_pending_assemble_externals ();
631 /* Emit LTO marker if LTO info has been previously emitted. This is
632 used by collect2 to determine whether an object file contains IL.
633 We used to emit an undefined reference here, but this produces
634 link errors if an object file with IL is stored into a shared
635 library without invoking lto1. */
636 if (flag_generate_lto
)
638 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
639 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
641 (unsigned HOST_WIDE_INT
) 1, 8);
642 #elif defined ASM_OUTPUT_ALIGNED_COMMON
643 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
644 (unsigned HOST_WIDE_INT
) 1, 8);
646 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
647 (unsigned HOST_WIDE_INT
) 1,
648 (unsigned HOST_WIDE_INT
) 1);
652 /* Attach a special .ident directive to the end of the file to identify
653 the version of GCC which compiled this code. The format of the .ident
654 string is patterned after the ones produced by native SVR4 compilers. */
658 const char *pkg_version
= "(GNU) ";
660 if (strcmp ("(GCC) ", pkgversion_string
))
661 pkg_version
= pkgversion_string
;
662 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
663 IDENT_ASM_OP
, pkg_version
, version_string
);
667 /* Invoke registered plugin callbacks. */
668 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
670 /* This must be at the end. Some target ports emit end of file directives
671 into the assembly file here, and hence we can not output anything to the
672 assembly file after this point. */
673 targetm
.asm_out
.file_end ();
676 /* Indexed by enum debug_info_type. */
677 const char *const debug_type_names
[] =
679 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
682 /* Print version information to FILE.
683 Each line begins with INDENT (for the case where FILE is the
684 assembler output file). */
687 print_version (FILE *file
, const char *indent
)
689 static const char fmt1
[] =
691 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
693 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
696 static const char fmt2
[] =
697 N_("GMP version %s, MPFR version %s, MPC version %s\n");
698 static const char fmt3
[] =
699 N_("%s%swarning: %s header version %s differs from library version %s.\n");
700 static const char fmt4
[] =
701 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
703 #define __VERSION__ "[?]"
706 file
== stderr
? _(fmt1
) : fmt1
,
707 indent
, *indent
!= 0 ? " " : "",
708 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
709 indent
, __VERSION__
);
711 /* We need to stringify the GMP macro values. Ugh, gmp_version has
712 two string formats, "i.j.k" and "i.j" when k is zero. As of
713 gmp-4.3.0, GMP always uses the 3 number format. */
714 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
715 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
716 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
717 #define GCC_GMP_VERSION \
718 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
719 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
720 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
721 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
723 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
724 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
725 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
728 file
== stderr
? _(fmt2
) : fmt2
,
729 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
730 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
732 file
== stderr
? _(fmt3
) : fmt3
,
733 indent
, *indent
!= 0 ? " " : "",
734 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
735 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
737 file
== stderr
? _(fmt3
) : fmt3
,
738 indent
, *indent
!= 0 ? " " : "",
739 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
740 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
742 file
== stderr
? _(fmt3
) : fmt3
,
743 indent
, *indent
!= 0 ? " " : "",
744 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
746 file
== stderr
? _(fmt4
) : fmt4
,
747 indent
, *indent
!= 0 ? " " : "",
748 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
750 print_plugins_versions (file
, indent
);
753 #ifdef ASM_COMMENT_START
755 print_to_asm_out_file (print_switch_type type
, const char * text
)
757 bool prepend_sep
= true;
761 case SWITCH_TYPE_LINE_END
:
762 putc ('\n', asm_out_file
);
765 case SWITCH_TYPE_LINE_START
:
766 fputs (ASM_COMMENT_START
, asm_out_file
);
767 return strlen (ASM_COMMENT_START
);
769 case SWITCH_TYPE_DESCRIPTIVE
:
770 if (ASM_COMMENT_START
[0] == 0)
773 case SWITCH_TYPE_PASSED
:
774 case SWITCH_TYPE_ENABLED
:
776 fputc (' ', asm_out_file
);
777 fputs (text
, asm_out_file
);
778 /* No need to return the length here as
779 print_single_switch has already done it. */
789 print_to_stderr (print_switch_type type
, const char * text
)
793 case SWITCH_TYPE_LINE_END
:
797 case SWITCH_TYPE_LINE_START
:
800 case SWITCH_TYPE_PASSED
:
801 case SWITCH_TYPE_ENABLED
:
805 case SWITCH_TYPE_DESCRIPTIVE
:
806 fputs (text
, stderr
);
807 /* No need to return the length here as
808 print_single_switch has already done it. */
816 /* Print an option value and return the adjusted position in the line.
817 ??? print_fn doesn't handle errors, eg disk full; presumably other
818 code will catch a disk full though. */
821 print_single_switch (print_switch_fn_type print_fn
,
823 print_switch_type type
,
826 /* The ultrix fprintf returns 0 on success, so compute the result
827 we want here since we need it for the following test. The +1
828 is for the separator character that will probably be emitted. */
829 int len
= strlen (text
) + 1;
832 && pos
+ len
> MAX_LINE
)
834 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
839 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
841 print_fn (type
, text
);
845 /* Print active target switches using PRINT_FN.
846 POS is the current cursor position and MAX is the size of a "line".
847 Each line begins with INDENT and ends with TERM.
848 Each switch is separated from the next by SEP. */
851 print_switch_values (print_switch_fn_type print_fn
)
856 /* Fill in the -frandom-seed option, if the user didn't pass it, so
857 that it can be printed below. This helps reproducibility. */
858 if (!flag_random_seed
)
861 /* Print the options as passed. */
862 pos
= print_single_switch (print_fn
, pos
,
863 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
865 for (j
= 1; j
< save_decoded_options_count
; j
++)
867 switch (save_decoded_options
[j
].opt_index
)
880 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
881 save_decoded_options
[j
].orig_option_with_args_text
);
885 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
887 /* Print the -f and -m options that have been enabled.
888 We don't handle language specific options but printing argv
890 pos
= print_single_switch (print_fn
, 0,
891 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
893 for (j
= 0; j
< cl_options_count
; j
++)
894 if ((cl_options
[j
].flags
& CL_REPORT
)
895 && option_enabled (j
, &global_options
) > 0)
896 pos
= print_single_switch (print_fn
, pos
,
897 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
899 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
902 /* Open assembly code output file. Do this even if -fsyntax-only is
903 on, because then the driver will have provided the name of a
904 temporary file or bit bucket for us. NAME is the file specified on
905 the command line, possibly NULL. */
907 init_asm_output (const char *name
)
909 if (name
== NULL
&& asm_file_name
== 0)
910 asm_out_file
= stdout
;
913 if (asm_file_name
== 0)
915 int len
= strlen (dump_base_name
);
916 char *dumpname
= XNEWVEC (char, len
+ 6);
918 memcpy (dumpname
, dump_base_name
, len
+ 1);
919 strip_off_ending (dumpname
, len
);
920 strcat (dumpname
, ".s");
921 asm_file_name
= dumpname
;
923 if (!strcmp (asm_file_name
, "-"))
924 asm_out_file
= stdout
;
926 asm_out_file
= fopen (asm_file_name
, "w+b");
927 if (asm_out_file
== 0)
928 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
931 if (flag_graphite_read
&& flag_graphite_write
)
932 fatal_error ("cannot read and write the Graphite representation at the same time");
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 #ifdef ASM_COMMENT_START
956 if (flag_verbose_asm
)
958 /* Print the list of switches in effect
959 into the assembler file as comments. */
960 print_version (asm_out_file
, ASM_COMMENT_START
);
961 print_switch_values (print_to_asm_out_file
);
962 putc ('\n', asm_out_file
);
968 /* Default tree printer. Handles declarations only. */
970 default_tree_printer (pretty_printer
*pp
, text_info
*text
, const char *spec
,
971 int precision
, bool wide
, bool set_locus
, bool hash
)
975 /* FUTURE: %+x should set the locus. */
976 if (precision
!= 0 || wide
|| hash
)
982 t
= va_arg (*text
->args_ptr
, tree
);
983 if (TREE_CODE (t
) == IDENTIFIER_NODE
)
985 pp_identifier (pp
, IDENTIFIER_POINTER (t
));
991 t
= va_arg (*text
->args_ptr
, tree
);
992 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
993 t
= DECL_DEBUG_EXPR (t
);
998 t
= va_arg (*text
->args_ptr
, tree
);
1002 percent_K_format (text
);
1009 if (set_locus
&& text
->locus
)
1010 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1014 const char *n
= DECL_NAME (t
)
1015 ? identifier_to_locale (lang_hooks
.decl_printable_name (t
, 2))
1020 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1025 /* A helper function; used as the reallocator function for cpp's line
1028 realloc_for_line_map (void *ptr
, size_t len
)
1030 return GGC_RESIZEVAR (void, ptr
, len
);
1033 /* A helper function: used as the allocator function for
1034 identifier_to_locale. */
1036 alloc_for_identifier_to_locale (size_t len
)
1038 return ggc_alloc_atomic (len
);
1041 /* Output stack usage information. */
1043 output_stack_usage (void)
1045 static bool warning_issued
= false;
1046 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
1047 const char *stack_usage_kind_str
[] = {
1052 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
1053 enum stack_usage_kind_type stack_usage_kind
;
1054 expanded_location loc
;
1055 const char *raw_id
, *id
;
1057 if (stack_usage
< 0)
1059 if (!warning_issued
)
1061 warning (0, "-fstack-usage not supported for this target");
1062 warning_issued
= true;
1067 stack_usage_kind
= STATIC
;
1069 /* Add the maximum amount of space pushed onto the stack. */
1070 if (current_function_pushed_stack_size
> 0)
1072 stack_usage
+= current_function_pushed_stack_size
;
1073 stack_usage_kind
= DYNAMIC_BOUNDED
;
1076 /* Now on to the tricky part: dynamic stack allocation. */
1077 if (current_function_allocates_dynamic_stack_space
)
1079 if (current_function_has_unbounded_dynamic_stack_size
)
1080 stack_usage_kind
= DYNAMIC
;
1082 stack_usage_kind
= DYNAMIC_BOUNDED
;
1084 /* Add the size even in the unbounded case, this can't hurt. */
1085 stack_usage
+= current_function_dynamic_stack_size
;
1088 loc
= expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1090 /* Strip the scope prefix if any. */
1091 raw_id
= lang_hooks
.decl_printable_name (current_function_decl
, 2);
1092 id
= strrchr (raw_id
, '.');
1098 fprintf (stack_usage_file
,
1099 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1100 lbasename (loc
.file
),
1105 stack_usage_kind_str
[stack_usage_kind
]);
1108 /* Open an auxiliary output file. */
1110 open_auxiliary_file (const char *ext
)
1115 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1116 file
= fopen (filename
, "w");
1118 fatal_error ("can%'t open %s for writing: %m", filename
);
1123 /* Initialization of the front end environment, before command line
1124 options are parsed. Signal handlers, internationalization etc.
1125 ARGV0 is main's argv[0]. */
1127 general_init (const char *argv0
)
1131 p
= argv0
+ strlen (argv0
);
1132 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1136 xmalloc_set_program_name (progname
);
1140 /* Unlock the stdio streams. */
1141 unlock_std_streams ();
1143 gcc_init_libintl ();
1145 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1146 identifier_to_locale_free
= ggc_free
;
1148 /* Initialize the diagnostics reporting machinery, so option parsing
1149 can give warnings and errors. */
1150 diagnostic_initialize (global_dc
, N_OPTS
);
1151 diagnostic_starter (global_dc
) = default_tree_diagnostic_starter
;
1152 /* Set a default printer. Language specific initializations will
1153 override it later. */
1154 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1155 global_dc
->show_option_requested
1156 = global_options_init
.x_flag_diagnostics_show_option
;
1157 global_dc
->show_column
1158 = global_options_init
.x_flag_show_column
;
1159 global_dc
->internal_error
= plugins_internal_error_function
;
1160 global_dc
->option_enabled
= option_enabled
;
1161 global_dc
->option_state
= &global_options
;
1162 global_dc
->option_name
= option_name
;
1164 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1166 signal (SIGSEGV
, crash_signal
);
1169 signal (SIGILL
, crash_signal
);
1172 signal (SIGBUS
, crash_signal
);
1175 signal (SIGABRT
, crash_signal
);
1177 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1178 signal (SIGIOT
, crash_signal
);
1181 signal (SIGFPE
, crash_signal
);
1184 /* Other host-specific signal setup. */
1185 (*host_hooks
.extra_signals
)();
1187 /* Initialize the garbage-collector, string pools and tree type hash
1191 line_table
= ggc_alloc_line_maps ();
1192 linemap_init (line_table
);
1193 line_table
->reallocator
= realloc_for_line_map
;
1196 /* Initialize register usage now so switches may override. */
1199 /* Register the language-independent parameters. */
1200 add_params (lang_independent_params
, LAST_PARAM
);
1201 targetm
.target_option
.default_params ();
1203 /* This must be done after add_params but before argument processing. */
1204 init_ggc_heuristics();
1205 init_optimization_passes ();
1206 statistics_early_init ();
1210 /* Return true if the current target supports -fsection-anchors. */
1213 target_supports_section_anchors_p (void)
1215 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1218 if (targetm
.asm_out
.output_anchor
== NULL
)
1224 /* Default the align_* variables to 1 if they're still unset, and
1225 set up the align_*_log variables. */
1227 init_alignments (void)
1229 if (align_loops
<= 0)
1231 if (align_loops_max_skip
> align_loops
)
1232 align_loops_max_skip
= align_loops
- 1;
1233 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1234 if (align_jumps
<= 0)
1236 if (align_jumps_max_skip
> align_jumps
)
1237 align_jumps_max_skip
= align_jumps
- 1;
1238 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1239 if (align_labels
<= 0)
1241 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1242 if (align_labels_max_skip
> align_labels
)
1243 align_labels_max_skip
= align_labels
- 1;
1244 if (align_functions
<= 0)
1245 align_functions
= 1;
1246 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1249 /* Process the options that have been parsed. */
1251 process_options (void)
1253 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1254 This can happen with incorrect pre-processed input. */
1255 debug_hooks
= &do_nothing_debug_hooks
;
1257 maximum_field_alignment
= initial_max_fld_align
* BITS_PER_UNIT
;
1259 /* This replaces set_Wunused. */
1260 if (warn_unused_function
== -1)
1261 warn_unused_function
= warn_unused
;
1262 if (warn_unused_label
== -1)
1263 warn_unused_label
= warn_unused
;
1264 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1265 if (warn_unused_parameter
== -1)
1266 warn_unused_parameter
= (warn_unused
&& extra_warnings
);
1267 if (warn_unused_variable
== -1)
1268 warn_unused_variable
= warn_unused
;
1269 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1271 if (warn_unused_but_set_parameter
== -1)
1272 warn_unused_but_set_parameter
= (warn_unused
&& extra_warnings
);
1273 if (warn_unused_but_set_variable
== -1)
1274 warn_unused_but_set_variable
= warn_unused
;
1275 if (warn_unused_value
== -1)
1276 warn_unused_value
= warn_unused
;
1278 /* This replaces set_Wextra. */
1279 if (warn_uninitialized
== -1)
1280 warn_uninitialized
= extra_warnings
;
1282 /* Allow the front end to perform consistency checks and do further
1283 initialization based on the command line options. This hook also
1284 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1285 so we can correctly initialize debug output. */
1286 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1288 /* Some machines may reject certain combinations of options. */
1289 targetm
.target_option
.override ();
1291 /* Avoid any informative notes in the second run of -fcompare-debug. */
1292 if (flag_compare_debug
)
1293 diagnostic_inhibit_notes (global_dc
);
1295 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1297 warning (OPT_fsection_anchors
,
1298 "this target does not support %qs", "-fsection-anchors");
1299 flag_section_anchors
= 0;
1302 if (flag_short_enums
== 2)
1303 flag_short_enums
= targetm
.default_short_enums ();
1305 /* Set aux_base_name if not already set. */
1308 else if (main_input_filename
)
1310 char *name
= xstrdup (lbasename (main_input_filename
));
1312 strip_off_ending (name
, strlen (name
));
1313 aux_base_name
= name
;
1316 aux_base_name
= "gccaux";
1321 || flag_loop_interchange
1322 || flag_loop_strip_mine
1323 || flag_graphite_identity
1324 || flag_loop_parallelize_all
)
1325 sorry ("Graphite loop optimizations cannot be used");
1328 /* Disable graphite loop optimizations when -fgraphite-read is
1330 if (flag_graphite_read
)
1332 flag_loop_block
= 0;
1333 flag_loop_interchange
= 0;
1334 flag_loop_strip_mine
= 0;
1337 /* Unrolling all loops implies that standard loop unrolling must also
1339 if (flag_unroll_all_loops
)
1340 flag_unroll_loops
= 1;
1342 /* web and rename-registers help when run after loop unrolling. */
1343 if (flag_web
== AUTODETECT_VALUE
)
1344 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1346 if (flag_rename_registers
== AUTODETECT_VALUE
)
1347 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1349 if (flag_non_call_exceptions
)
1350 flag_asynchronous_unwind_tables
= 1;
1351 if (flag_asynchronous_unwind_tables
)
1352 flag_unwind_tables
= 1;
1354 if (flag_value_profile_transformations
)
1355 flag_profile_values
= 1;
1357 /* Warn about options that are not supported on this machine. */
1358 #ifndef INSN_SCHEDULING
1359 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1360 warning (0, "instruction scheduling not supported on this target machine");
1363 if (flag_delayed_branch
)
1364 warning (0, "this target machine does not have delayed branches");
1367 user_label_prefix
= USER_LABEL_PREFIX
;
1368 if (flag_leading_underscore
!= -1)
1370 /* If the default prefix is more complicated than "" or "_",
1371 issue a warning and ignore this option. */
1372 if (user_label_prefix
[0] == 0 ||
1373 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1375 user_label_prefix
= flag_leading_underscore
? "_" : "";
1378 warning (0, "-f%sleading-underscore not supported on this target machine",
1379 flag_leading_underscore
? "" : "no-");
1382 /* If we are in verbose mode, write out the version and maybe all the
1383 option flags in use. */
1386 print_version (stderr
, "");
1388 print_switch_values (print_to_stderr
);
1391 if (flag_syntax_only
)
1393 write_symbols
= NO_DEBUG
;
1399 if (debug_info_level
== DINFO_LEVEL_NONE
)
1401 debug_info_level
= DINFO_LEVEL_NORMAL
;
1403 if (write_symbols
== NO_DEBUG
)
1404 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1407 debug_info_level
= DINFO_LEVEL_NONE
;
1410 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1412 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1415 error ("could not open final insn dump file %qs: %m",
1416 flag_dump_final_insns
);
1417 flag_dump_final_insns
= NULL
;
1419 else if (fclose (final_output
))
1421 error ("could not close zeroed insn dump file %qs: %m",
1422 flag_dump_final_insns
);
1423 flag_dump_final_insns
= NULL
;
1427 /* Unless over-ridden for the target, assume that all DWARF levels
1428 may be emitted, if DWARF2_DEBUG is selected. */
1429 if (dwarf_strict
< 0)
1432 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1434 if (debug_info_level
== DINFO_LEVEL_NONE
)
1435 write_symbols
= NO_DEBUG
;
1437 if (write_symbols
== NO_DEBUG
)
1439 #if defined(DBX_DEBUGGING_INFO)
1440 else if (write_symbols
== DBX_DEBUG
)
1441 debug_hooks
= &dbx_debug_hooks
;
1443 #if defined(XCOFF_DEBUGGING_INFO)
1444 else if (write_symbols
== XCOFF_DEBUG
)
1445 debug_hooks
= &xcoff_debug_hooks
;
1447 #ifdef SDB_DEBUGGING_INFO
1448 else if (write_symbols
== SDB_DEBUG
)
1449 debug_hooks
= &sdb_debug_hooks
;
1451 #ifdef DWARF2_DEBUGGING_INFO
1452 else if (write_symbols
== DWARF2_DEBUG
)
1453 debug_hooks
= &dwarf2_debug_hooks
;
1455 #ifdef VMS_DEBUGGING_INFO
1456 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1457 debug_hooks
= &vmsdbg_debug_hooks
;
1460 error ("target system does not support the \"%s\" debug format",
1461 debug_type_names
[write_symbols
]);
1463 /* We know which debug output will be used so we can set flag_var_tracking
1464 and flag_var_tracking_uninit if the user has not specified them. */
1465 if (debug_info_level
< DINFO_LEVEL_NORMAL
1466 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1468 if (flag_var_tracking
== 1
1469 || flag_var_tracking_uninit
== 1)
1471 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1472 warning (0, "variable tracking requested, but useless unless "
1473 "producing debug info");
1475 warning (0, "variable tracking requested, but not supported "
1476 "by this debug format");
1478 flag_var_tracking
= 0;
1479 flag_var_tracking_uninit
= 0;
1482 /* The debug hooks are used to implement -fdump-go-spec because it
1483 gives a simple and stable API for all the information we need to
1485 if (flag_dump_go_spec
!= NULL
)
1486 debug_hooks
= dump_go_spec_init (flag_dump_go_spec
, debug_hooks
);
1488 /* If the user specifically requested variable tracking with tagging
1489 uninitialized variables, we need to turn on variable tracking.
1490 (We already determined above that variable tracking is feasible.) */
1491 if (flag_var_tracking_uninit
)
1492 flag_var_tracking
= 1;
1494 if (flag_var_tracking
== AUTODETECT_VALUE
)
1495 flag_var_tracking
= optimize
>= 1;
1497 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1498 flag_var_tracking_assignments
= flag_var_tracking
1499 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1501 if (flag_var_tracking_assignments_toggle
)
1502 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1504 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1505 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1507 if (flag_var_tracking_assignments
1508 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1509 warning (0, "var-tracking-assignments changes selective scheduling");
1511 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1512 #ifdef HAVE_conditional_move
1513 flag_tree_cselim
= 1;
1515 flag_tree_cselim
= 0;
1518 /* If auxiliary info generation is desired, open the output file.
1519 This goes in the same directory as the source file--unlike
1520 all the other output files. */
1521 if (flag_gen_aux_info
)
1523 aux_info_file
= fopen (aux_info_file_name
, "w");
1524 if (aux_info_file
== 0)
1525 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1528 if (! targetm
.have_named_sections
)
1530 if (flag_function_sections
)
1532 warning (0, "-ffunction-sections not supported for this target");
1533 flag_function_sections
= 0;
1535 if (flag_data_sections
)
1537 warning (0, "-fdata-sections not supported for this target");
1538 flag_data_sections
= 0;
1542 if (flag_function_sections
&& profile_flag
)
1544 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1545 flag_function_sections
= 0;
1548 #ifndef HAVE_prefetch
1549 if (flag_prefetch_loop_arrays
> 0)
1551 warning (0, "-fprefetch-loop-arrays not supported for this target");
1552 flag_prefetch_loop_arrays
= 0;
1555 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1557 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1558 flag_prefetch_loop_arrays
= 0;
1562 /* This combination of options isn't handled for i386 targets and doesn't
1563 make much sense anyway, so don't allow it. */
1564 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1566 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1567 flag_prefetch_loop_arrays
= 0;
1570 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1571 if (flag_signaling_nans
)
1572 flag_trapping_math
= 1;
1574 /* We cannot reassociate if we want traps or signed zeros. */
1575 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1577 warning (0, "-fassociative-math disabled; other options take precedence");
1578 flag_associative_math
= 0;
1581 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1582 if (flag_cx_limited_range
)
1583 flag_complex_method
= 0;
1585 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1586 if (flag_cx_fortran_rules
)
1587 flag_complex_method
= 1;
1589 /* Targets must be able to place spill slots at lower addresses. If the
1590 target already uses a soft frame pointer, the transition is trivial. */
1591 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1593 warning (0, "-fstack-protector not supported for this target");
1594 flag_stack_protect
= 0;
1596 if (!flag_stack_protect
)
1597 warn_stack_protect
= 0;
1599 /* ??? Unwind info is not correct around the CFG unless either a frame
1600 pointer is present or A_O_A is set. Fixing this requires rewriting
1601 unwind info generation to be aware of the CFG and propagating states
1603 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
1604 && flag_omit_frame_pointer
)
1606 warning (0, "unwind tables currently require a frame pointer "
1608 flag_omit_frame_pointer
= 0;
1611 /* Save the current optimization options. */
1612 optimization_default_node
= build_optimization_node ();
1613 optimization_current_node
= optimization_default_node
;
1616 /* This function can be called multiple times to reinitialize the compiler
1617 back end when register classes or instruction sets have changed,
1618 before each function. */
1620 backend_init_target (void)
1622 /* Initialize alignment variables. */
1625 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1626 to initialize reg_raw_mode[]. */
1629 /* This invokes target hooks to set fixed_reg[] etc, which is
1633 /* This depends on stack_pointer_rtx. */
1634 init_fake_stack_mems ();
1636 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1638 init_alias_target ();
1640 /* Depends on HARD_FRAME_POINTER_REGNUM. */
1643 /* The following initialization functions need to generate rtl, so
1644 provide a dummy function context for them. */
1645 init_dummy_function_start ();
1647 /* rtx_cost is mode-dependent, so cached values need to be recomputed
1648 on a mode change. */
1651 /* We may need to recompute regno_save_code[] and regno_restore_code[]
1652 after a mode change as well. */
1653 caller_save_initialized_p
= false;
1655 expand_dummy_function_end ();
1658 /* Initialize the compiler back end. This function is called only once,
1659 when starting the compiler. */
1666 init_inline_once ();
1667 init_varasm_once ();
1668 save_register_info ();
1670 /* Initialize the target-specific back end pieces. */
1672 backend_init_target ();
1675 /* Initialize excess precision settings. */
1677 init_excess_precision (void)
1679 /* Adjust excess precision handling based on the target options. If
1680 the front end cannot handle it, flag_excess_precision_cmdline
1681 will already have been set accordingly in the post_options
1683 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
1684 flag_excess_precision
= flag_excess_precision_cmdline
;
1685 if (flag_unsafe_math_optimizations
)
1686 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1687 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
1689 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
1690 switch (flt_eval_method
)
1694 /* Either the target acts unpredictably (-1) or has all the
1695 operations required not to have excess precision (0). */
1696 flag_excess_precision
= EXCESS_PRECISION_FAST
;
1700 /* In these cases, predictable excess precision makes
1704 /* Any other implementation-defined FLT_EVAL_METHOD values
1705 require the compiler to handle the associated excess
1706 precision rules in excess_precision_type. */
1712 /* Initialize things that are both lang-dependent and target-dependent.
1713 This function can be called more than once if target parameters change. */
1715 lang_dependent_init_target (void)
1717 /* This determines excess precision settings. */
1718 init_excess_precision ();
1720 /* This creates various _DECL nodes, so needs to be called after the
1721 front end is initialized. It also depends on the HAVE_xxx macros
1722 generated from the target machine description. */
1725 /* The following initialization functions need to generate rtl, so
1726 provide a dummy function context for them. */
1727 init_dummy_function_start ();
1729 /* Do the target-specific parts of expr initialization. */
1730 init_expr_target ();
1732 /* Although the actions of these functions are language-independent,
1733 they use optabs, so we cannot call them from backend_init. */
1737 expand_dummy_function_end ();
1740 /* Language-dependent initialization. Returns nonzero on success. */
1742 lang_dependent_init (const char *name
)
1744 location_t save_loc
= input_location
;
1745 if (dump_base_name
== 0)
1746 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1748 /* Other front-end initialization. */
1749 input_location
= BUILTINS_LOCATION
;
1750 if (lang_hooks
.init () == 0)
1752 input_location
= save_loc
;
1754 init_asm_output (name
);
1756 /* If stack usage information is desired, open the output file. */
1757 if (flag_stack_usage
)
1758 stack_usage_file
= open_auxiliary_file ("su");
1760 /* This creates various _DECL nodes, so needs to be called after the
1761 front end is initialized. */
1764 /* Do the target-specific parts of the initialization. */
1765 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 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1772 if (dwarf2out_do_frame ())
1773 dwarf2out_frame_init ();
1776 /* Now we have the correct original filename, we can initialize
1778 (*debug_hooks
->init
) (name
);
1780 timevar_pop (TV_SYMOUT
);
1786 /* Reinitialize everything when target parameters, such as register usage,
1789 target_reinit (void)
1791 /* Reinitialize RTL backend. */
1792 backend_init_target ();
1794 /* Reinitialize lang-dependent parts. */
1795 lang_dependent_init_target ();
1799 dump_memory_report (bool final
)
1801 ggc_print_statistics ();
1802 stringpool_statistics ();
1803 dump_tree_statistics ();
1804 dump_gimple_statistics ();
1805 dump_rtx_statistics ();
1806 dump_alloc_pool_statistics ();
1807 dump_bitmap_statistics ();
1808 dump_vec_loc_statistics ();
1809 dump_ggc_loc_statistics (final
);
1810 dump_alias_stats (stderr
);
1811 dump_pta_stats (stderr
);
1814 /* Clean up: close opened files, etc. */
1817 finalize (bool no_backend
)
1819 /* Close the dump files. */
1820 if (flag_gen_aux_info
)
1822 fclose (aux_info_file
);
1824 unlink (aux_info_file_name
);
1827 /* Close non-debugging input and output files. Take special care to note
1828 whether fclose returns an error, since the pages might still be on the
1829 buffer chain while the file is open. */
1833 if (ferror (asm_out_file
) != 0)
1834 fatal_error ("error writing to %s: %m", asm_file_name
);
1835 if (fclose (asm_out_file
) != 0)
1836 fatal_error ("error closing %s: %m", asm_file_name
);
1838 unlink_if_ordinary (asm_file_name
);
1841 if (stack_usage_file
)
1842 fclose (stack_usage_file
);
1848 finish_optimization_passes ();
1854 dump_memory_report (true);
1856 /* Language-specific end of compilation actions. */
1857 lang_hooks
.finish ();
1860 /* Initialize the compiler, and compile the input file. */
1864 /* Initialize timing first. The C front ends read the main file in
1865 the post_options hook, and C++ does file timings. */
1866 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
1868 timevar_start (TV_TOTAL
);
1872 /* Don't do any more if an error has already occurred. */
1875 /* This must be run always, because it is needed to compute the FP
1876 predefined macros, such as __LDBL_MAX__, for targets using non
1877 default FP formats. */
1878 init_adjust_machine_modes ();
1880 /* Set up the back-end if requested. */
1884 /* Language-dependent initialization. Returns true on success. */
1885 if (lang_dependent_init (main_input_filename
))
1888 finalize (no_backend
);
1891 /* Stop timing and print the times. */
1892 timevar_stop (TV_TOTAL
);
1893 timevar_print (stderr
);
1896 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1897 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1898 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1900 It is not safe to call this function more than once. */
1903 toplev_main (int argc
, char **argv
)
1905 expandargv (&argc
, &argv
);
1907 /* Initialization of GCC's environment, and diagnostics. */
1908 general_init (argv
[0]);
1910 /* One-off initialization of options that does not need to be
1911 repeated when options are added for particular functions. */
1912 init_options_once ();
1914 /* Initialize global options structures; this must be repeated for
1915 each structure used for parsing options. */
1916 init_options_struct (&global_options
, &global_options_set
);
1917 lang_hooks
.init_options_struct (&global_options
);
1919 /* Convert the options to an array. */
1920 decode_cmdline_options_to_array_default_mask (argc
,
1921 CONST_CAST2 (const char **,
1923 &save_decoded_options
,
1924 &save_decoded_options_count
);
1926 /* Perform language-specific options initialization. */
1927 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
1929 /* Parse the options and do minimal processing; basically just
1930 enough to default flags appropriately. */
1931 decode_options (&global_options
, &global_options_set
,
1932 save_decoded_options
, save_decoded_options_count
,
1933 UNKNOWN_LOCATION
, global_dc
);
1935 handle_common_deferred_options ();
1939 initialize_plugins ();
1942 print_version (stderr
, "");
1945 print_plugins_help (stderr
, "");
1947 /* Exit early if we can (e.g. -help). */
1948 if (!exit_after_options
)
1951 if (warningcount
|| errorcount
)
1952 print_ignored_options ();
1953 diagnostic_finish (global_dc
);
1955 /* Invoke registered plugin callbacks if any. */
1956 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
1958 finalize_plugins ();
1960 return (FATAL_EXIT_CODE
);
1962 return (SUCCESS_EXIT_CODE
);