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"
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
44 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
49 #include "insn-attr.h"
50 #include "insn-config.h"
51 #include "insn-flags.h"
52 #include "hard-reg-set.h"
59 #include "basic-block.h"
65 #include "diagnostic.h"
66 #include "tree-diagnostic.h"
67 #include "tree-pretty-print.h"
71 #include "dwarf2asm.h"
72 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
81 #include "opts-diagnostic.h"
83 #include "value-prof.h"
84 #include "alloc-pool.h"
85 #include "tree-mudflap.h"
86 #include "tree-pass.h"
88 #include "tree-ssa-alias.h"
91 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
92 #include "dwarf2out.h"
95 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
99 #ifdef SDB_DEBUGGING_INFO
103 #ifdef XCOFF_DEBUGGING_INFO
104 #include "xcoffout.h" /* Needed for external data
105 declarations for e.g. AIX 4.x. */
108 static void general_init (const char *);
109 static void do_compile (void);
110 static void process_options (void);
111 static void backend_init (void);
112 static int lang_dependent_init (const char *);
113 static void init_asm_output (const char *);
114 static void finalize (void);
116 static void crash_signal (int) ATTRIBUTE_NORETURN
;
117 static void setup_core_dumping (void);
118 static void compile_file (void);
120 /* Nonzero to dump debug info whilst parsing (-dy option). */
121 static int set_yydebug
;
123 /* True if we don't need a backend (e.g. preprocessing only). */
124 static bool no_backend
;
126 /* Length of line when printing switch values. */
129 /* Decoded options, and number of such options. */
130 struct cl_decoded_option
*save_decoded_options
;
131 unsigned int save_decoded_options_count
;
133 /* Name of top-level original source file (what was input to cpp).
134 This comes from the #-command at the beginning of the actual input.
135 If there isn't any there, then this is the cc1 input file name. */
137 const char *main_input_filename
;
139 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
140 to optimize in process_options (). */
141 #define AUTODETECT_VALUE 2
143 /* Prefix for profile data files */
144 const char *profile_data_prefix
;
146 /* Debug hooks - dependent upon command line options. */
148 const struct gcc_debug_hooks
*debug_hooks
;
150 /* Other flags saying which kinds of debugging dump have been requested. */
152 int rtl_dump_and_exit
;
153 int flag_print_asm_name
;
154 enum graph_dump_types graph_dump_format
;
156 /* True if this is the lto front end. This is used to disable
157 gimple generation and lowering passes that are normally run on the
158 output of a front end. These passes must be bypassed for lto since
159 they have already been done before the gimple was written. */
161 bool in_lto_p
= false;
163 /* The FUNCTION_DECL for the function currently being compiled,
164 or 0 if between functions. */
165 tree current_function_decl
;
167 /* Set to the FUNC_BEGIN label of the current function, or NULL
169 const char * current_function_func_begin_label
;
171 /* A random sequence of characters, unless overridden by user. */
172 static const char *flag_random_seed
;
174 /* A local time stamp derived from the time of compilation. It will be
175 zero if the system cannot provide a time. It will be -1u, if the
176 user has specified a particular random seed. */
181 /* Generate code for GNU or NeXT Objective-C runtime environment. */
183 #ifdef NEXT_OBJC_RUNTIME
184 int flag_next_runtime
= 1;
186 int flag_next_runtime
= 0;
189 /* Nonzero means make permerror produce warnings instead of errors. */
191 int flag_permissive
= 0;
193 /* -dA causes debug commentary information to be produced in
194 the generated assembly code (to make it more readable). This option
195 is generally only of use to those who actually need to read the
196 generated assembly code (perhaps while debugging the compiler itself).
197 Currently, this switch is only used by dwarfout.c; however, it is intended
198 to be a catchall for printing debug information in the assembler file. */
200 int flag_debug_asm
= 0;
202 /* -dP causes the rtl to be emitted as a comment in assembly. */
204 int flag_dump_rtl_in_asm
= 0;
206 /* When non-NULL, indicates that whenever space is allocated on the
207 stack, the resulting stack pointer must not pass this
208 address---that is, for stacks that grow downward, the stack pointer
209 must always be greater than or equal to this address; for stacks
210 that grow upward, the stack pointer must be less than this address.
211 At present, the rtx may be either a REG or a SYMBOL_REF, although
212 the support provided depends on the backend. */
215 /* Type of stack check. */
216 enum stack_check_type flag_stack_check
= NO_STACK_CHECK
;
218 /* True if the user has tagged the function with the 'section'
221 bool user_defined_section_attribute
= false;
223 struct target_flag_state default_target_flag_state
;
224 #if SWITCHABLE_TARGET
225 struct target_flag_state
*this_target_flag_state
= &default_target_flag_state
;
227 #define this_target_flag_state (&default_target_flag_state)
232 const char *const string
;
236 lang_independent_options
;
238 /* The user symbol prefix after having resolved same. */
239 const char *user_label_prefix
;
241 static const param_info lang_independent_params
[] = {
242 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
243 { OPTION, DEFAULT, MIN, MAX, HELP },
244 #include "params.def"
246 { NULL
, 0, 0, 0, NULL
}
249 /* Output files for assembler code (real compiler output)
250 and debugging dumps. */
254 FILE *stack_usage_file
= NULL
;
255 FILE *dump_file
= NULL
;
256 const char *dump_file_name
;
258 /* The current working directory of a translation. It's generally the
259 directory from which compilation was initiated, but a preprocessed
260 file may specify the original directory in which it was
263 static const char *src_pwd
;
265 /* Initialize src_pwd with the given string, and return true. If it
266 was already initialized, return false. As a special case, it may
267 be called with a NULL argument to test whether src_pwd has NOT been
271 set_src_pwd (const char *pwd
)
275 if (strcmp (src_pwd
, pwd
) == 0)
281 src_pwd
= xstrdup (pwd
);
285 /* Return the directory from which the translation unit was initiated,
286 in case set_src_pwd() was not called before to assign it a
302 /* Called when the start of a function definition is parsed,
303 this function prints on stderr the name of the function. */
305 announce_function (tree decl
)
309 if (rtl_dump_and_exit
)
310 fprintf (stderr
, "%s ",
311 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
313 fprintf (stderr
, " %s",
314 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
316 pp_needs_newline (global_dc
->printer
) = true;
317 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
321 /* Initialize local_tick with the time of day, or -1 if
322 flag_random_seed is set. */
325 init_local_tick (void)
327 if (!flag_random_seed
)
329 /* Get some more or less random data. */
330 #ifdef HAVE_GETTIMEOFDAY
334 gettimeofday (&tv
, NULL
);
335 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
339 time_t now
= time (NULL
);
341 if (now
!= (time_t)-1)
342 local_tick
= (unsigned) now
;
350 /* Set up a default flag_random_seed and local_tick, unless the user
351 already specified one. Must be called after init_local_tick. */
354 init_random_seed (void)
356 unsigned HOST_WIDE_INT value
;
357 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
359 value
= local_tick
^ getpid ();
361 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
362 flag_random_seed
= random_seed
;
365 /* Obtain the random_seed string. Unless NOINIT, initialize it if
366 it's not provided in the command line. */
369 get_random_seed (bool noinit
)
371 if (!flag_random_seed
&& !noinit
)
373 return flag_random_seed
;
376 /* Modify the random_seed string to VAL. Return its previous
380 set_random_seed (const char *val
)
382 const char *old
= flag_random_seed
;
383 flag_random_seed
= val
;
387 #if GCC_VERSION < 3004
389 /* The functions clz_hwi, ctz_hwi, ffs_hwi, floor_log2 and exact_log2
390 are defined as inline functions in toplev.h if GCC_VERSION >= 3004.
391 The definitions here are used for older versions of gcc. */
393 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
394 If X is 0, return -1. */
397 floor_log2 (unsigned HOST_WIDE_INT x
)
404 if (HOST_BITS_PER_WIDE_INT
> 64)
405 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
407 if (HOST_BITS_PER_WIDE_INT
> 32)
408 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
410 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
412 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
414 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
416 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
418 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
424 /* Return the logarithm of X, base 2, considering X unsigned,
425 if X is a power of 2. Otherwise, returns -1. */
428 exact_log2 (unsigned HOST_WIDE_INT x
)
432 return floor_log2 (x
);
435 /* Given X, an unsigned number, return the number of least significant bits
436 that are zero. When X == 0, the result is the word size. */
439 ctz_hwi (unsigned HOST_WIDE_INT x
)
441 return x
? floor_log2 (x
& -x
) : HOST_BITS_PER_WIDE_INT
;
444 /* Similarly for most significant bits. */
447 clz_hwi (unsigned HOST_WIDE_INT x
)
449 return HOST_BITS_PER_WIDE_INT
- 1 - floor_log2(x
);
452 /* Similar to ctz_hwi, except that the least significant bit is numbered
453 starting from 1, and X == 0 yields 0. */
456 ffs_hwi (unsigned HOST_WIDE_INT x
)
458 return 1 + floor_log2 (x
& -x
);
461 #endif /* GCC_VERSION < 3004 */
463 /* Handler for fatal signals, such as SIGSEGV. These are transformed
464 into ICE messages, which is much more user friendly. In case the
465 error printer crashes, reset the signal to prevent infinite recursion. */
468 crash_signal (int signo
)
470 signal (signo
, SIG_DFL
);
472 /* If we crashed while processing an ASM statement, then be a little more
473 graceful. It's most likely the user's fault. */
474 if (this_is_asm_operands
)
476 output_operand_lossage ("unrecoverable error");
477 exit (FATAL_EXIT_CODE
);
480 internal_error ("%s", strsignal (signo
));
483 /* Arrange to dump core on error. (The regular error message is still
484 printed first, except in the case of abort().) */
487 setup_core_dumping (void)
490 signal (SIGABRT
, SIG_DFL
);
492 #if defined(HAVE_SETRLIMIT)
495 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
496 fatal_error ("getting core file size maximum limit: %m");
497 rlim
.rlim_cur
= rlim
.rlim_max
;
498 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
499 fatal_error ("setting core file size limit to maximum: %m");
502 diagnostic_abort_on_error (global_dc
);
506 /* Strip off a legitimate source ending from the input string NAME of
507 length LEN. Rather than having to know the names used by all of
508 our front ends, we strip off an ending of a period followed by
509 up to five characters. (Java uses ".class".) */
512 strip_off_ending (char *name
, int len
)
515 for (i
= 2; i
< 6 && len
> i
; i
++)
517 if (name
[len
- i
] == '.')
519 name
[len
- i
] = '\0';
525 /* Output a quoted string. */
528 output_quoted_string (FILE *asm_file
, const char *string
)
530 #ifdef OUTPUT_QUOTED_STRING
531 OUTPUT_QUOTED_STRING (asm_file
, string
);
535 putc ('\"', asm_file
);
536 while ((c
= *string
++) != 0)
540 if (c
== '\"' || c
== '\\')
541 putc ('\\', asm_file
);
545 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
547 putc ('\"', asm_file
);
551 /* A subroutine of wrapup_global_declarations. We've come to the end of
552 the compilation unit. All deferred variables should be undeferred,
553 and all incomplete decls should be finalized. */
556 wrapup_global_declaration_1 (tree decl
)
558 /* We're not deferring this any longer. Assignment is conditional to
559 avoid needlessly dirtying PCH pages. */
560 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
561 && DECL_DEFER_OUTPUT (decl
) != 0)
562 DECL_DEFER_OUTPUT (decl
) = 0;
564 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
565 lang_hooks
.finish_incomplete_decl (decl
);
568 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
569 needs to be output. Return true if it is output. */
572 wrapup_global_declaration_2 (tree decl
)
574 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
577 /* Don't write out static consts, unless we still need them.
579 We also keep static consts if not optimizing (for debugging),
580 unless the user specified -fno-keep-static-consts.
581 ??? They might be better written into the debug information.
582 This is possible when using DWARF.
584 A language processor that wants static constants to be always
585 written out (even if it is not used) is responsible for
586 calling rest_of_decl_compilation itself. E.g. the C front-end
587 calls rest_of_decl_compilation from finish_decl.
588 One motivation for this is that is conventional in some
589 environments to write things like:
590 static const char rcsid[] = "... version string ...";
591 intending to force the string to be in the executable.
593 A language processor that would prefer to have unneeded
594 static constants "optimized away" would just defer writing
595 them out until here. E.g. C++ does this, because static
596 constants are often defined in header files.
598 ??? A tempting alternative (for both C and C++) would be
599 to force a constant to be written if and only if it is
600 defined in a main file, as opposed to an include file. */
602 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
604 struct varpool_node
*node
;
606 node
= varpool_get_node (decl
);
608 if (!node
&& flag_ltrans
)
610 else if (node
&& node
->finalized
)
612 else if (node
&& node
->alias
)
614 else if (!cgraph_global_info_ready
616 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
618 else if (node
&& node
->needed
)
620 else if (DECL_COMDAT (decl
))
622 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
623 && (optimize
|| !flag_keep_static_consts
624 || DECL_ARTIFICIAL (decl
)))
629 rest_of_decl_compilation (decl
, 1, 1);
637 /* Do any final processing required for the declarations in VEC, of
638 which there are LEN. We write out inline functions and variables
639 that have been deferred until this point, but which are required.
640 Returns nonzero if anything was put out. */
643 wrapup_global_declarations (tree
*vec
, int len
)
645 bool reconsider
, output_something
= false;
648 for (i
= 0; i
< len
; i
++)
649 wrapup_global_declaration_1 (vec
[i
]);
651 /* Now emit any global variables or functions that we have been
652 putting off. We need to loop in case one of the things emitted
653 here references another one which comes earlier in the list. */
657 for (i
= 0; i
< len
; i
++)
658 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
660 output_something
= true;
664 return output_something
;
667 /* A subroutine of check_global_declarations. Issue appropriate warnings
668 for the global declaration DECL. */
671 check_global_declaration_1 (tree decl
)
673 /* Warn about any function declared static but not defined. We don't
674 warn about variables, because many programs have static variables
675 that exist only to get some text into the object file. */
676 if (TREE_CODE (decl
) == FUNCTION_DECL
677 && DECL_INITIAL (decl
) == 0
678 && DECL_EXTERNAL (decl
)
679 && ! DECL_ARTIFICIAL (decl
)
680 && ! TREE_NO_WARNING (decl
)
681 && ! TREE_PUBLIC (decl
)
682 && (warn_unused_function
683 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
685 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
686 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
688 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
689 /* This symbol is effectively an "extern" declaration now. */
690 TREE_PUBLIC (decl
) = 1;
691 assemble_external (decl
);
694 /* Warn about static fns or vars defined but not used. */
695 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
696 /* We don't warn about "static const" variables because the
697 "rcs_id" idiom uses that construction. */
698 || (warn_unused_variable
699 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
700 && ! DECL_IN_SYSTEM_HEADER (decl
)
701 && ! TREE_USED (decl
)
702 /* The TREE_USED bit for file-scope decls is kept in the identifier,
703 to handle multiple external decls in different scopes. */
704 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
705 && ! DECL_EXTERNAL (decl
)
706 && ! TREE_PUBLIC (decl
)
707 /* A volatile variable might be used in some non-obvious way. */
708 && ! TREE_THIS_VOLATILE (decl
)
709 /* Global register variables must be declared to reserve them. */
710 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
711 /* Otherwise, ask the language. */
712 && lang_hooks
.decls
.warn_unused_global (decl
))
713 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
714 ? OPT_Wunused_function
715 : OPT_Wunused_variable
,
716 "%q+D defined but not used", decl
);
719 /* Issue appropriate warnings for the global declarations in VEC (of
720 which there are LEN). */
723 check_global_declarations (tree
*vec
, int len
)
727 for (i
= 0; i
< len
; i
++)
728 check_global_declaration_1 (vec
[i
]);
731 /* Emit debugging information for all global declarations in VEC. */
734 emit_debug_global_declarations (tree
*vec
, int len
)
738 /* Avoid confusing the debug information machinery when there are errors. */
742 timevar_push (TV_SYMOUT
);
743 for (i
= 0; i
< len
; i
++)
744 debug_hooks
->global_decl (vec
[i
]);
745 timevar_pop (TV_SYMOUT
);
748 /* Warn about a use of an identifier which was marked deprecated. */
750 warn_deprecated_use (tree node
, tree attr
)
754 if (node
== 0 || !warn_deprecated_decl
)
760 attr
= DECL_ATTRIBUTES (node
);
761 else if (TYPE_P (node
))
763 tree decl
= TYPE_STUB_DECL (node
);
765 attr
= lookup_attribute ("deprecated",
766 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
771 attr
= lookup_attribute ("deprecated", attr
);
774 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
780 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
782 warning (OPT_Wdeprecated_declarations
,
783 "%qD is deprecated (declared at %s:%d): %s",
784 node
, xloc
.file
, xloc
.line
, msg
);
786 warning (OPT_Wdeprecated_declarations
,
787 "%qD is deprecated (declared at %s:%d)",
788 node
, xloc
.file
, xloc
.line
);
790 else if (TYPE_P (node
))
792 tree what
= NULL_TREE
;
793 tree decl
= TYPE_STUB_DECL (node
);
795 if (TYPE_NAME (node
))
797 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
798 what
= TYPE_NAME (node
);
799 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
800 && DECL_NAME (TYPE_NAME (node
)))
801 what
= DECL_NAME (TYPE_NAME (node
));
806 expanded_location xloc
807 = expand_location (DECL_SOURCE_LOCATION (decl
));
811 warning (OPT_Wdeprecated_declarations
,
812 "%qE is deprecated (declared at %s:%d): %s",
813 what
, xloc
.file
, xloc
.line
, msg
);
815 warning (OPT_Wdeprecated_declarations
,
816 "%qE is deprecated (declared at %s:%d)", what
,
817 xloc
.file
, xloc
.line
);
822 warning (OPT_Wdeprecated_declarations
,
823 "type is deprecated (declared at %s:%d): %s",
824 xloc
.file
, xloc
.line
, msg
);
826 warning (OPT_Wdeprecated_declarations
,
827 "type is deprecated (declared at %s:%d)",
828 xloc
.file
, xloc
.line
);
836 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
839 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
844 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
847 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
853 /* Compile an entire translation unit. Write a file of assembly
854 output and various debugging dumps. */
859 /* Initialize yet another pass. */
861 ggc_protect_identifiers
= true;
864 init_final (main_input_filename
);
865 coverage_init (aux_base_name
);
867 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
869 timevar_push (TV_PARSE
);
871 /* Call the parser, which parses the entire file (calling
872 rest_of_compilation for each function). */
873 lang_hooks
.parse_file (set_yydebug
);
875 /* Compilation is now finished except for writing
876 what's left of the symbol table output. */
877 timevar_pop (TV_PARSE
);
879 if (flag_syntax_only
|| flag_wpa
)
882 ggc_protect_identifiers
= false;
884 /* This must also call cgraph_finalize_compilation_unit. */
885 lang_hooks
.decls
.final_write_globals ();
890 varpool_assemble_pending_decls ();
893 /* Likewise for mudflap static object registrations. */
895 mudflap_finish_file ();
897 output_shared_constant_pool ();
898 output_object_blocks ();
900 /* Write out any pending weak symbol declarations. */
903 /* This must be at the end before unwind and debug info.
904 Some target ports emit PIC setup thunks here. */
905 targetm
.asm_out
.code_end ();
907 /* Do dbx symbols. */
908 timevar_push (TV_SYMOUT
);
910 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
911 if (dwarf2out_do_frame ())
912 dwarf2out_frame_finish ();
915 (*debug_hooks
->finish
) (main_input_filename
);
916 timevar_pop (TV_SYMOUT
);
918 /* Output some stuff at end of file if nec. */
920 dw2_output_indirect_constants ();
922 /* Flush any pending external directives. */
923 process_pending_assemble_externals ();
925 /* Emit LTO marker if LTO info has been previously emitted. This is
926 used by collect2 to determine whether an object file contains IL.
927 We used to emit an undefined reference here, but this produces
928 link errors if an object file with IL is stored into a shared
929 library without invoking lto1. */
930 if (flag_generate_lto
)
932 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
933 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
935 (unsigned HOST_WIDE_INT
) 1, 8);
936 #elif defined ASM_OUTPUT_ALIGNED_COMMON
937 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
938 (unsigned HOST_WIDE_INT
) 1, 8);
940 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
941 (unsigned HOST_WIDE_INT
) 1,
942 (unsigned HOST_WIDE_INT
) 1);
946 /* Attach a special .ident directive to the end of the file to identify
947 the version of GCC which compiled this code. The format of the .ident
948 string is patterned after the ones produced by native SVR4 compilers. */
952 const char *pkg_version
= "(GNU) ";
954 if (strcmp ("(GCC) ", pkgversion_string
))
955 pkg_version
= pkgversion_string
;
956 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
957 IDENT_ASM_OP
, pkg_version
, version_string
);
961 /* Invoke registered plugin callbacks. */
962 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
964 /* This must be at the end. Some target ports emit end of file directives
965 into the assembly file here, and hence we can not output anything to the
966 assembly file after this point. */
967 targetm
.asm_out
.file_end ();
970 /* Parse a -d... command line switch. */
973 decode_d_option (const char *arg
)
984 flag_print_asm_name
= 1;
987 flag_dump_rtl_in_asm
= 1;
988 flag_print_asm_name
= 1;
991 graph_dump_format
= vcg
;
994 rtl_dump_and_exit
= 1;
999 case 'D': /* These are handled by the preprocessor. */
1006 setup_core_dumping();
1009 enable_rtl_dump_file ();
1013 warning (0, "unrecognized gcc debugging option: %c", c
);
1018 /* Indexed by enum debug_info_type. */
1019 const char *const debug_type_names
[] =
1021 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1024 /* Print version information to FILE.
1025 Each line begins with INDENT (for the case where FILE is the
1026 assembler output file). */
1029 print_version (FILE *file
, const char *indent
)
1031 static const char fmt1
[] =
1033 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1035 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1038 static const char fmt2
[] =
1039 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1040 static const char fmt3
[] =
1041 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1042 static const char fmt4
[] =
1043 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1045 #define __VERSION__ "[?]"
1048 file
== stderr
? _(fmt1
) : fmt1
,
1049 indent
, *indent
!= 0 ? " " : "",
1050 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
1051 indent
, __VERSION__
);
1053 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1054 two string formats, "i.j.k" and "i.j" when k is zero. As of
1055 gmp-4.3.0, GMP always uses the 3 number format. */
1056 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1057 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1058 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1059 #define GCC_GMP_VERSION \
1060 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1061 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1062 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1063 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1065 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1066 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1067 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1070 file
== stderr
? _(fmt2
) : fmt2
,
1071 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
1072 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
1074 file
== stderr
? _(fmt3
) : fmt3
,
1075 indent
, *indent
!= 0 ? " " : "",
1076 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
1077 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
1079 file
== stderr
? _(fmt3
) : fmt3
,
1080 indent
, *indent
!= 0 ? " " : "",
1081 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
1082 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
1084 file
== stderr
? _(fmt3
) : fmt3
,
1085 indent
, *indent
!= 0 ? " " : "",
1086 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
1088 file
== stderr
? _(fmt4
) : fmt4
,
1089 indent
, *indent
!= 0 ? " " : "",
1090 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1092 print_plugins_versions (file
, indent
);
1095 #ifdef ASM_COMMENT_START
1097 print_to_asm_out_file (print_switch_type type
, const char * text
)
1099 bool prepend_sep
= true;
1103 case SWITCH_TYPE_LINE_END
:
1104 putc ('\n', asm_out_file
);
1107 case SWITCH_TYPE_LINE_START
:
1108 fputs (ASM_COMMENT_START
, asm_out_file
);
1109 return strlen (ASM_COMMENT_START
);
1111 case SWITCH_TYPE_DESCRIPTIVE
:
1112 if (ASM_COMMENT_START
[0] == 0)
1113 prepend_sep
= false;
1115 case SWITCH_TYPE_PASSED
:
1116 case SWITCH_TYPE_ENABLED
:
1118 fputc (' ', asm_out_file
);
1119 fputs (text
, asm_out_file
);
1120 /* No need to return the length here as
1121 print_single_switch has already done it. */
1131 print_to_stderr (print_switch_type type
, const char * text
)
1135 case SWITCH_TYPE_LINE_END
:
1136 putc ('\n', stderr
);
1139 case SWITCH_TYPE_LINE_START
:
1142 case SWITCH_TYPE_PASSED
:
1143 case SWITCH_TYPE_ENABLED
:
1144 fputc (' ', stderr
);
1147 case SWITCH_TYPE_DESCRIPTIVE
:
1148 fputs (text
, stderr
);
1149 /* No need to return the length here as
1150 print_single_switch has already done it. */
1158 /* Print an option value and return the adjusted position in the line.
1159 ??? print_fn doesn't handle errors, eg disk full; presumably other
1160 code will catch a disk full though. */
1163 print_single_switch (print_switch_fn_type print_fn
,
1165 print_switch_type type
,
1168 /* The ultrix fprintf returns 0 on success, so compute the result
1169 we want here since we need it for the following test. The +1
1170 is for the separator character that will probably be emitted. */
1171 int len
= strlen (text
) + 1;
1174 && pos
+ len
> MAX_LINE
)
1176 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1181 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
1183 print_fn (type
, text
);
1187 /* Print active target switches using PRINT_FN.
1188 POS is the current cursor position and MAX is the size of a "line".
1189 Each line begins with INDENT and ends with TERM.
1190 Each switch is separated from the next by SEP. */
1193 print_switch_values (print_switch_fn_type print_fn
)
1198 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1199 that it can be printed below. This helps reproducibility. */
1200 if (!flag_random_seed
)
1201 init_random_seed ();
1203 /* Print the options as passed. */
1204 pos
= print_single_switch (print_fn
, pos
,
1205 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
1207 for (j
= 1; j
< save_decoded_options_count
; j
++)
1209 switch (save_decoded_options
[j
].opt_index
)
1222 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
,
1223 save_decoded_options
[j
].orig_option_with_args_text
);
1227 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1229 /* Print the -f and -m options that have been enabled.
1230 We don't handle language specific options but printing argv
1232 pos
= print_single_switch (print_fn
, 0,
1233 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
1235 for (j
= 0; j
< cl_options_count
; j
++)
1236 if ((cl_options
[j
].flags
& CL_REPORT
)
1237 && option_enabled (j
, &global_options
) > 0)
1238 pos
= print_single_switch (print_fn
, pos
,
1239 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
1241 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1244 /* Open assembly code output file. Do this even if -fsyntax-only is
1245 on, because then the driver will have provided the name of a
1246 temporary file or bit bucket for us. NAME is the file specified on
1247 the command line, possibly NULL. */
1249 init_asm_output (const char *name
)
1251 if (name
== NULL
&& asm_file_name
== 0)
1252 asm_out_file
= stdout
;
1255 if (asm_file_name
== 0)
1257 int len
= strlen (dump_base_name
);
1258 char *dumpname
= XNEWVEC (char, len
+ 6);
1260 memcpy (dumpname
, dump_base_name
, len
+ 1);
1261 strip_off_ending (dumpname
, len
);
1262 strcat (dumpname
, ".s");
1263 asm_file_name
= dumpname
;
1265 if (!strcmp (asm_file_name
, "-"))
1266 asm_out_file
= stdout
;
1268 asm_out_file
= fopen (asm_file_name
, "w+b");
1269 if (asm_out_file
== 0)
1270 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1273 if (!flag_syntax_only
)
1275 targetm
.asm_out
.file_start ();
1277 if (flag_record_gcc_switches
)
1279 if (targetm
.asm_out
.record_gcc_switches
)
1281 /* Let the target know that we are about to start recording. */
1282 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1284 /* Now record the switches. */
1285 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1286 /* Let the target know that the recording is over. */
1287 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1291 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
1294 #ifdef ASM_COMMENT_START
1295 if (flag_verbose_asm
)
1297 /* Print the list of switches in effect
1298 into the assembler file as comments. */
1299 print_version (asm_out_file
, ASM_COMMENT_START
);
1300 print_switch_values (print_to_asm_out_file
);
1301 putc ('\n', asm_out_file
);
1307 /* Return true if the state of option OPTION should be stored in PCH files
1308 and checked by default_pch_valid_p. Store the option's current state
1312 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1314 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1316 if (option_flag_var (option
, &global_options
) == &target_flags
)
1317 if (targetm
.check_pch_target_flags
)
1319 return get_option_state (&global_options
, option
, state
);
1322 /* Default version of get_pch_validity.
1323 By default, every flag difference is fatal; that will be mostly right for
1324 most targets, but completely right for very few. */
1327 default_get_pch_validity (size_t *sz
)
1329 struct cl_option_state state
;
1334 if (targetm
.check_pch_target_flags
)
1335 *sz
+= sizeof (target_flags
);
1336 for (i
= 0; i
< cl_options_count
; i
++)
1337 if (option_affects_pch_p (i
, &state
))
1340 result
= r
= XNEWVEC (char, *sz
);
1344 if (targetm
.check_pch_target_flags
)
1346 memcpy (r
, &target_flags
, sizeof (target_flags
));
1347 r
+= sizeof (target_flags
);
1350 for (i
= 0; i
< cl_options_count
; i
++)
1351 if (option_affects_pch_p (i
, &state
))
1353 memcpy (r
, state
.data
, state
.size
);
1360 /* Return a message which says that a PCH file was created with a different
1361 setting of OPTION. */
1364 pch_option_mismatch (const char *option
)
1368 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1370 return _("out of memory");
1374 /* Default version of pch_valid_p. */
1377 default_pch_valid_p (const void *data_p
, size_t len
)
1379 struct cl_option_state state
;
1380 const char *data
= (const char *)data_p
;
1383 /* -fpic and -fpie also usually make a PCH invalid. */
1384 if (data
[0] != flag_pic
)
1385 return _("created and used with different settings of -fpic");
1386 if (data
[1] != flag_pie
)
1387 return _("created and used with different settings of -fpie");
1390 /* Check target_flags. */
1391 if (targetm
.check_pch_target_flags
)
1396 memcpy (&tf
, data
, sizeof (target_flags
));
1397 data
+= sizeof (target_flags
);
1398 len
-= sizeof (target_flags
);
1399 r
= targetm
.check_pch_target_flags (tf
);
1404 for (i
= 0; i
< cl_options_count
; i
++)
1405 if (option_affects_pch_p (i
, &state
))
1407 if (memcmp (data
, state
.data
, state
.size
) != 0)
1408 return pch_option_mismatch (cl_options
[i
].opt_text
);
1416 /* Default tree printer. Handles declarations only. */
1418 default_tree_printer (pretty_printer
*pp
, text_info
*text
, const char *spec
,
1419 int precision
, bool wide
, bool set_locus
, bool hash
)
1423 /* FUTURE: %+x should set the locus. */
1424 if (precision
!= 0 || wide
|| hash
)
1430 t
= va_arg (*text
->args_ptr
, tree
);
1431 if (TREE_CODE (t
) == IDENTIFIER_NODE
)
1433 pp_identifier (pp
, IDENTIFIER_POINTER (t
));
1439 t
= va_arg (*text
->args_ptr
, tree
);
1440 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1441 t
= DECL_DEBUG_EXPR (t
);
1446 t
= va_arg (*text
->args_ptr
, tree
);
1450 percent_K_format (text
);
1457 if (set_locus
&& text
->locus
)
1458 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1462 const char *n
= DECL_NAME (t
)
1463 ? identifier_to_locale (lang_hooks
.decl_printable_name (t
, 2))
1468 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1473 /* A helper function; used as the reallocator function for cpp's line
1476 realloc_for_line_map (void *ptr
, size_t len
)
1478 return GGC_RESIZEVAR (void, ptr
, len
);
1481 /* A helper function: used as the allocator function for
1482 identifier_to_locale. */
1484 alloc_for_identifier_to_locale (size_t len
)
1486 return ggc_alloc_atomic (len
);
1489 /* Output stack usage information. */
1491 output_stack_usage (void)
1493 static bool warning_issued
= false;
1494 enum stack_usage_kind_type
{ STATIC
= 0, DYNAMIC
, DYNAMIC_BOUNDED
};
1495 const char *stack_usage_kind_str
[] = {
1500 HOST_WIDE_INT stack_usage
= current_function_static_stack_size
;
1501 enum stack_usage_kind_type stack_usage_kind
;
1502 expanded_location loc
;
1503 const char *raw_id
, *id
;
1505 if (stack_usage
< 0)
1507 if (!warning_issued
)
1509 warning (0, "-fstack-usage not supported for this target");
1510 warning_issued
= true;
1515 stack_usage_kind
= STATIC
;
1517 /* Add the maximum amount of space pushed onto the stack. */
1518 if (current_function_pushed_stack_size
> 0)
1520 stack_usage
+= current_function_pushed_stack_size
;
1521 stack_usage_kind
= DYNAMIC_BOUNDED
;
1524 /* Now on to the tricky part: dynamic stack allocation. */
1525 if (current_function_allocates_dynamic_stack_space
)
1527 if (current_function_has_unbounded_dynamic_stack_size
)
1528 stack_usage_kind
= DYNAMIC
;
1530 stack_usage_kind
= DYNAMIC_BOUNDED
;
1532 /* Add the size even in the unbounded case, this can't hurt. */
1533 stack_usage
+= current_function_dynamic_stack_size
;
1536 loc
= expand_location (DECL_SOURCE_LOCATION (current_function_decl
));
1538 /* Strip the scope prefix if any. */
1539 raw_id
= lang_hooks
.decl_printable_name (current_function_decl
, 2);
1540 id
= strrchr (raw_id
, '.');
1546 fprintf (stack_usage_file
,
1547 "%s:%d:%d:%s\t"HOST_WIDE_INT_PRINT_DEC
"\t%s\n",
1548 lbasename (loc
.file
),
1553 stack_usage_kind_str
[stack_usage_kind
]);
1556 /* Open an auxiliary output file. */
1558 open_auxiliary_file (const char *ext
)
1563 filename
= concat (aux_base_name
, ".", ext
, NULL
);
1564 file
= fopen (filename
, "w");
1566 fatal_error ("can%'t open %s for writing: %m", filename
);
1571 /* Initialization of the front end environment, before command line
1572 options are parsed. Signal handlers, internationalization etc.
1573 ARGV0 is main's argv[0]. */
1575 general_init (const char *argv0
)
1579 p
= argv0
+ strlen (argv0
);
1580 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1584 xmalloc_set_program_name (progname
);
1588 /* Unlock the stdio streams. */
1589 unlock_std_streams ();
1591 gcc_init_libintl ();
1593 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1594 identifier_to_locale_free
= ggc_free
;
1596 /* Initialize the diagnostics reporting machinery, so option parsing
1597 can give warnings and errors. */
1598 diagnostic_initialize (global_dc
, N_OPTS
);
1599 diagnostic_starter (global_dc
) = default_tree_diagnostic_starter
;
1600 /* Set a default printer. Language specific initializations will
1601 override it later. */
1602 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1603 global_dc
->show_option_requested
1604 = global_options_init
.x_flag_diagnostics_show_option
;
1605 global_dc
->show_column
1606 = global_options_init
.x_flag_show_column
;
1607 global_dc
->internal_error
= plugins_internal_error_function
;
1608 global_dc
->option_enabled
= option_enabled
;
1609 global_dc
->option_state
= &global_options
;
1610 global_dc
->option_name
= option_name
;
1612 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1614 signal (SIGSEGV
, crash_signal
);
1617 signal (SIGILL
, crash_signal
);
1620 signal (SIGBUS
, crash_signal
);
1623 signal (SIGABRT
, crash_signal
);
1625 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1626 signal (SIGIOT
, crash_signal
);
1629 signal (SIGFPE
, crash_signal
);
1632 /* Other host-specific signal setup. */
1633 (*host_hooks
.extra_signals
)();
1635 /* Initialize the garbage-collector, string pools and tree type hash
1639 line_table
= ggc_alloc_line_maps ();
1640 linemap_init (line_table
);
1641 line_table
->reallocator
= realloc_for_line_map
;
1644 /* Initialize register usage now so switches may override. */
1647 /* Register the language-independent parameters. */
1648 add_params (lang_independent_params
, LAST_PARAM
);
1649 targetm
.target_option
.default_params ();
1651 /* This must be done after add_params but before argument processing. */
1652 init_ggc_heuristics();
1653 init_optimization_passes ();
1654 statistics_early_init ();
1658 /* Return true if the current target supports -fsection-anchors. */
1661 target_supports_section_anchors_p (void)
1663 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1666 if (targetm
.asm_out
.output_anchor
== NULL
)
1672 /* Default the align_* variables to 1 if they're still unset, and
1673 set up the align_*_log variables. */
1675 init_alignments (void)
1677 if (align_loops
<= 0)
1679 if (align_loops_max_skip
> align_loops
)
1680 align_loops_max_skip
= align_loops
- 1;
1681 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1682 if (align_jumps
<= 0)
1684 if (align_jumps_max_skip
> align_jumps
)
1685 align_jumps_max_skip
= align_jumps
- 1;
1686 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1687 if (align_labels
<= 0)
1689 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1690 if (align_labels_max_skip
> align_labels
)
1691 align_labels_max_skip
= align_labels
- 1;
1692 if (align_functions
<= 0)
1693 align_functions
= 1;
1694 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1697 /* Process the options that have been parsed. */
1699 process_options (void)
1701 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1702 This can happen with incorrect pre-processed input. */
1703 debug_hooks
= &do_nothing_debug_hooks
;
1705 /* This replaces set_Wunused. */
1706 if (warn_unused_function
== -1)
1707 warn_unused_function
= warn_unused
;
1708 if (warn_unused_label
== -1)
1709 warn_unused_label
= warn_unused
;
1710 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1711 if (warn_unused_parameter
== -1)
1712 warn_unused_parameter
= (warn_unused
&& extra_warnings
);
1713 if (warn_unused_variable
== -1)
1714 warn_unused_variable
= warn_unused
;
1715 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1717 if (warn_unused_but_set_parameter
== -1)
1718 warn_unused_but_set_parameter
= (warn_unused
&& extra_warnings
);
1719 if (warn_unused_but_set_variable
== -1)
1720 warn_unused_but_set_variable
= warn_unused
;
1721 if (warn_unused_value
== -1)
1722 warn_unused_value
= warn_unused
;
1724 /* This replaces set_Wextra. */
1725 if (warn_uninitialized
== -1)
1726 warn_uninitialized
= extra_warnings
;
1728 /* Allow the front end to perform consistency checks and do further
1729 initialization based on the command line options. This hook also
1730 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1731 so we can correctly initialize debug output. */
1732 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1734 /* Some machines may reject certain combinations of options. */
1735 targetm
.target_option
.override ();
1737 /* Avoid any informative notes in the second run of -fcompare-debug. */
1738 if (flag_compare_debug
)
1739 diagnostic_inhibit_notes (global_dc
);
1741 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1743 warning (OPT_fsection_anchors
,
1744 "this target does not support %qs", "-fsection-anchors");
1745 flag_section_anchors
= 0;
1748 if (flag_short_enums
== 2)
1749 flag_short_enums
= targetm
.default_short_enums ();
1751 /* Set aux_base_name if not already set. */
1754 else if (main_input_filename
)
1756 char *name
= xstrdup (lbasename (main_input_filename
));
1758 strip_off_ending (name
, strlen (name
));
1759 aux_base_name
= name
;
1762 aux_base_name
= "gccaux";
1767 || flag_loop_interchange
1768 || flag_loop_strip_mine
1769 || flag_graphite_identity
1770 || flag_loop_parallelize_all
)
1771 sorry ("Graphite loop optimizations cannot be used");
1774 /* Unrolling all loops implies that standard loop unrolling must also
1776 if (flag_unroll_all_loops
)
1777 flag_unroll_loops
= 1;
1779 /* web and rename-registers help when run after loop unrolling. */
1780 if (flag_web
== AUTODETECT_VALUE
)
1781 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1783 if (flag_rename_registers
== AUTODETECT_VALUE
)
1784 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1786 if (flag_non_call_exceptions
)
1787 flag_asynchronous_unwind_tables
= 1;
1788 if (flag_asynchronous_unwind_tables
)
1789 flag_unwind_tables
= 1;
1791 if (flag_value_profile_transformations
)
1792 flag_profile_values
= 1;
1794 /* Warn about options that are not supported on this machine. */
1795 #ifndef INSN_SCHEDULING
1796 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1797 warning (0, "instruction scheduling not supported on this target machine");
1800 if (flag_delayed_branch
)
1801 warning (0, "this target machine does not have delayed branches");
1804 user_label_prefix
= USER_LABEL_PREFIX
;
1805 if (flag_leading_underscore
!= -1)
1807 /* If the default prefix is more complicated than "" or "_",
1808 issue a warning and ignore this option. */
1809 if (user_label_prefix
[0] == 0 ||
1810 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1812 user_label_prefix
= flag_leading_underscore
? "_" : "";
1815 warning (0, "-f%sleading-underscore not supported on this target machine",
1816 flag_leading_underscore
? "" : "no-");
1819 /* If we are in verbose mode, write out the version and maybe all the
1820 option flags in use. */
1823 print_version (stderr
, "");
1825 print_switch_values (print_to_stderr
);
1828 if (flag_syntax_only
)
1830 write_symbols
= NO_DEBUG
;
1836 if (debug_info_level
== DINFO_LEVEL_NONE
)
1838 debug_info_level
= DINFO_LEVEL_NORMAL
;
1840 if (write_symbols
== NO_DEBUG
)
1841 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1844 debug_info_level
= DINFO_LEVEL_NONE
;
1847 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1849 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1852 error ("could not open final insn dump file %qs: %m",
1853 flag_dump_final_insns
);
1854 flag_dump_final_insns
= NULL
;
1856 else if (fclose (final_output
))
1858 error ("could not close zeroed insn dump file %qs: %m",
1859 flag_dump_final_insns
);
1860 flag_dump_final_insns
= NULL
;
1864 /* Unless over-ridden for the target, assume that all DWARF levels
1865 may be emitted, if DWARF2_DEBUG is selected. */
1866 if (dwarf_strict
< 0)
1869 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1871 if (debug_info_level
== DINFO_LEVEL_NONE
)
1872 write_symbols
= NO_DEBUG
;
1874 if (write_symbols
== NO_DEBUG
)
1876 #if defined(DBX_DEBUGGING_INFO)
1877 else if (write_symbols
== DBX_DEBUG
)
1878 debug_hooks
= &dbx_debug_hooks
;
1880 #if defined(XCOFF_DEBUGGING_INFO)
1881 else if (write_symbols
== XCOFF_DEBUG
)
1882 debug_hooks
= &xcoff_debug_hooks
;
1884 #ifdef SDB_DEBUGGING_INFO
1885 else if (write_symbols
== SDB_DEBUG
)
1886 debug_hooks
= &sdb_debug_hooks
;
1888 #ifdef DWARF2_DEBUGGING_INFO
1889 else if (write_symbols
== DWARF2_DEBUG
)
1890 debug_hooks
= &dwarf2_debug_hooks
;
1892 #ifdef VMS_DEBUGGING_INFO
1893 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1894 debug_hooks
= &vmsdbg_debug_hooks
;
1897 error ("target system does not support the \"%s\" debug format",
1898 debug_type_names
[write_symbols
]);
1900 /* We know which debug output will be used so we can set flag_var_tracking
1901 and flag_var_tracking_uninit if the user has not specified them. */
1902 if (debug_info_level
< DINFO_LEVEL_NORMAL
1903 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1905 if (flag_var_tracking
== 1
1906 || flag_var_tracking_uninit
== 1)
1908 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1909 warning (0, "variable tracking requested, but useless unless "
1910 "producing debug info");
1912 warning (0, "variable tracking requested, but not supported "
1913 "by this debug format");
1915 flag_var_tracking
= 0;
1916 flag_var_tracking_uninit
= 0;
1919 /* If the user specifically requested variable tracking with tagging
1920 uninitialized variables, we need to turn on variable tracking.
1921 (We already determined above that variable tracking is feasible.) */
1922 if (flag_var_tracking_uninit
)
1923 flag_var_tracking
= 1;
1925 if (flag_var_tracking
== AUTODETECT_VALUE
)
1926 flag_var_tracking
= optimize
>= 1;
1928 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
1929 flag_var_tracking_assignments
= flag_var_tracking
1930 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
1932 if (flag_var_tracking_assignments_toggle
)
1933 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
1935 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
1936 flag_var_tracking
= flag_var_tracking_assignments
= -1;
1938 if (flag_var_tracking_assignments
1939 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
1940 warning (0, "var-tracking-assignments changes selective scheduling");
1942 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1943 #ifdef HAVE_conditional_move
1944 flag_tree_cselim
= 1;
1946 flag_tree_cselim
= 0;
1949 /* If auxiliary info generation is desired, open the output file.
1950 This goes in the same directory as the source file--unlike
1951 all the other output files. */
1952 if (flag_gen_aux_info
)
1954 aux_info_file
= fopen (aux_info_file_name
, "w");
1955 if (aux_info_file
== 0)
1956 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1959 if (! targetm
.have_named_sections
)
1961 if (flag_function_sections
)
1963 warning (0, "-ffunction-sections not supported for this target");
1964 flag_function_sections
= 0;
1966 if (flag_data_sections
)
1968 warning (0, "-fdata-sections not supported for this target");
1969 flag_data_sections
= 0;
1973 if (flag_function_sections
&& profile_flag
)
1975 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1976 flag_function_sections
= 0;
1979 #ifndef HAVE_prefetch
1980 if (flag_prefetch_loop_arrays
> 0)
1982 warning (0, "-fprefetch-loop-arrays not supported for this target");
1983 flag_prefetch_loop_arrays
= 0;
1986 if (flag_prefetch_loop_arrays
> 0 && !HAVE_prefetch
)
1988 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1989 flag_prefetch_loop_arrays
= 0;
1993 /* This combination of options isn't handled for i386 targets and doesn't
1994 make much sense anyway, so don't allow it. */
1995 if (flag_prefetch_loop_arrays
> 0 && optimize_size
)
1997 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1998 flag_prefetch_loop_arrays
= 0;
2001 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2002 if (flag_signaling_nans
)
2003 flag_trapping_math
= 1;
2005 /* We cannot reassociate if we want traps or signed zeros. */
2006 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
2008 warning (0, "-fassociative-math disabled; other options take precedence");
2009 flag_associative_math
= 0;
2012 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2013 if (flag_cx_limited_range
)
2014 flag_complex_method
= 0;
2016 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2017 if (flag_cx_fortran_rules
)
2018 flag_complex_method
= 1;
2020 /* Targets must be able to place spill slots at lower addresses. If the
2021 target already uses a soft frame pointer, the transition is trivial. */
2022 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
2024 warning (0, "-fstack-protector not supported for this target");
2025 flag_stack_protect
= 0;
2027 if (!flag_stack_protect
)
2028 warn_stack_protect
= 0;
2030 /* ??? Unwind info is not correct around the CFG unless either a frame
2031 pointer is present or A_O_A is set. Fixing this requires rewriting
2032 unwind info generation to be aware of the CFG and propagating states
2034 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
2035 && flag_omit_frame_pointer
)
2037 warning (0, "unwind tables currently require a frame pointer "
2039 flag_omit_frame_pointer
= 0;
2042 /* Save the current optimization options. */
2043 optimization_default_node
= build_optimization_node ();
2044 optimization_current_node
= optimization_default_node
;
2047 /* This function can be called multiple times to reinitialize the compiler
2048 back end when register classes or instruction sets have changed,
2049 before each function. */
2051 backend_init_target (void)
2053 /* Initialize alignment variables. */
2056 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2057 to initialize reg_raw_mode[]. */
2060 /* This invokes target hooks to set fixed_reg[] etc, which is
2064 /* This depends on stack_pointer_rtx. */
2065 init_fake_stack_mems ();
2067 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2069 init_alias_target ();
2071 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2074 /* The following initialization functions need to generate rtl, so
2075 provide a dummy function context for them. */
2076 init_dummy_function_start ();
2078 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2079 on a mode change. */
2082 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2083 after a mode change as well. */
2084 caller_save_initialized_p
= false;
2086 expand_dummy_function_end ();
2089 /* Initialize the compiler back end. This function is called only once,
2090 when starting the compiler. */
2097 init_inline_once ();
2098 init_varasm_once ();
2099 save_register_info ();
2101 /* Initialize the target-specific back end pieces. */
2103 backend_init_target ();
2106 /* Initialize excess precision settings. */
2108 init_excess_precision (void)
2110 /* Adjust excess precision handling based on the target options. If
2111 the front end cannot handle it, flag_excess_precision_cmdline
2112 will already have been set accordingly in the post_options
2114 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
2115 flag_excess_precision
= flag_excess_precision_cmdline
;
2116 if (flag_unsafe_math_optimizations
)
2117 flag_excess_precision
= EXCESS_PRECISION_FAST
;
2118 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
2120 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
2121 switch (flt_eval_method
)
2125 /* Either the target acts unpredictably (-1) or has all the
2126 operations required not to have excess precision (0). */
2127 flag_excess_precision
= EXCESS_PRECISION_FAST
;
2131 /* In these cases, predictable excess precision makes
2135 /* Any other implementation-defined FLT_EVAL_METHOD values
2136 require the compiler to handle the associated excess
2137 precision rules in excess_precision_type. */
2143 /* Initialize things that are both lang-dependent and target-dependent.
2144 This function can be called more than once if target parameters change. */
2146 lang_dependent_init_target (void)
2148 /* This determines excess precision settings. */
2149 init_excess_precision ();
2151 /* This creates various _DECL nodes, so needs to be called after the
2152 front end is initialized. It also depends on the HAVE_xxx macros
2153 generated from the target machine description. */
2156 /* The following initialization functions need to generate rtl, so
2157 provide a dummy function context for them. */
2158 init_dummy_function_start ();
2160 /* Do the target-specific parts of expr initialization. */
2161 init_expr_target ();
2163 /* Although the actions of these functions are language-independent,
2164 they use optabs, so we cannot call them from backend_init. */
2168 expand_dummy_function_end ();
2171 /* Language-dependent initialization. Returns nonzero on success. */
2173 lang_dependent_init (const char *name
)
2175 location_t save_loc
= input_location
;
2176 if (dump_base_name
== 0)
2177 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
2179 /* Other front-end initialization. */
2180 input_location
= BUILTINS_LOCATION
;
2181 if (lang_hooks
.init () == 0)
2183 input_location
= save_loc
;
2185 init_asm_output (name
);
2187 /* If stack usage information is desired, open the output file. */
2188 if (flag_stack_usage
)
2189 stack_usage_file
= open_auxiliary_file ("su");
2191 /* This creates various _DECL nodes, so needs to be called after the
2192 front end is initialized. */
2195 /* Do the target-specific parts of the initialization. */
2196 lang_dependent_init_target ();
2198 /* If dbx symbol table desired, initialize writing it and output the
2199 predefined types. */
2200 timevar_push (TV_SYMOUT
);
2202 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2203 if (dwarf2out_do_frame ())
2204 dwarf2out_frame_init ();
2207 /* Now we have the correct original filename, we can initialize
2209 (*debug_hooks
->init
) (name
);
2211 timevar_pop (TV_SYMOUT
);
2217 /* Reinitialize everything when target parameters, such as register usage,
2220 target_reinit (void)
2222 /* Reinitialize RTL backend. */
2223 backend_init_target ();
2225 /* Reinitialize lang-dependent parts. */
2226 lang_dependent_init_target ();
2230 dump_memory_report (bool final
)
2232 ggc_print_statistics ();
2233 stringpool_statistics ();
2234 dump_tree_statistics ();
2235 dump_gimple_statistics ();
2236 dump_rtx_statistics ();
2237 dump_alloc_pool_statistics ();
2238 dump_bitmap_statistics ();
2239 dump_vec_loc_statistics ();
2240 dump_ggc_loc_statistics (final
);
2241 dump_alias_stats (stderr
);
2242 dump_pta_stats (stderr
);
2245 /* Clean up: close opened files, etc. */
2250 /* Close the dump files. */
2251 if (flag_gen_aux_info
)
2253 fclose (aux_info_file
);
2255 unlink (aux_info_file_name
);
2258 /* Close non-debugging input and output files. Take special care to note
2259 whether fclose returns an error, since the pages might still be on the
2260 buffer chain while the file is open. */
2264 if (ferror (asm_out_file
) != 0)
2265 fatal_error ("error writing to %s: %m", asm_file_name
);
2266 if (fclose (asm_out_file
) != 0)
2267 fatal_error ("error closing %s: %m", asm_file_name
);
2269 unlink_if_ordinary (asm_file_name
);
2272 if (stack_usage_file
)
2273 fclose (stack_usage_file
);
2276 finish_optimization_passes ();
2281 dump_memory_report (true);
2283 /* Language-specific end of compilation actions. */
2284 lang_hooks
.finish ();
2287 /* Initialize the compiler, and compile the input file. */
2291 /* Initialize timing first. The C front ends read the main file in
2292 the post_options hook, and C++ does file timings. */
2293 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2295 timevar_start (TV_TOTAL
);
2299 /* Don't do any more if an error has already occurred. */
2302 /* This must be run always, because it is needed to compute the FP
2303 predefined macros, such as __LDBL_MAX__, for targets using non
2304 default FP formats. */
2305 init_adjust_machine_modes ();
2307 /* Set up the back-end if requested. */
2311 /* Language-dependent initialization. Returns true on success. */
2312 if (lang_dependent_init (main_input_filename
))
2318 /* Stop timing and print the times. */
2319 timevar_stop (TV_TOTAL
);
2320 timevar_print (stderr
);
2323 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2324 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2325 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2327 It is not safe to call this function more than once. */
2330 toplev_main (int argc
, char **argv
)
2332 expandargv (&argc
, &argv
);
2334 /* Initialization of GCC's environment, and diagnostics. */
2335 general_init (argv
[0]);
2337 /* One-off initialization of options that does not need to be
2338 repeated when options are added for particular functions. */
2339 init_options_once ();
2341 /* Initialize global options structures; this must be repeated for
2342 each structure used for parsing options. */
2343 init_options_struct (&global_options
, &global_options_set
);
2344 lang_hooks
.init_options_struct (&global_options
);
2346 /* Convert the options to an array. */
2347 decode_cmdline_options_to_array_default_mask (argc
,
2348 CONST_CAST2 (const char **,
2350 &save_decoded_options
,
2351 &save_decoded_options_count
);
2353 /* Perform language-specific options initialization. */
2354 lang_hooks
.init_options (save_decoded_options_count
, save_decoded_options
);
2356 /* Parse the options and do minimal processing; basically just
2357 enough to default flags appropriately. */
2358 decode_options (&global_options
, &global_options_set
,
2359 save_decoded_options
, save_decoded_options_count
,
2364 initialize_plugins ();
2367 print_version (stderr
, "");
2370 print_plugins_help (stderr
, "");
2372 /* Exit early if we can (e.g. -help). */
2373 if (!exit_after_options
)
2376 if (warningcount
|| errorcount
)
2377 print_ignored_options ();
2378 diagnostic_finish (global_dc
);
2380 /* Invoke registered plugin callbacks if any. */
2381 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2383 finalize_plugins ();
2385 return (FATAL_EXIT_CODE
);
2387 return (SUCCESS_EXIT_CODE
);