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 /* Copy of argument vector to toplev_main. */
130 static const char **save_argv
;
132 /* Name of top-level original source file (what was input to cpp).
133 This comes from the #-command at the beginning of the actual input.
134 If there isn't any there, then this is the cc1 input file name. */
136 const char *main_input_filename
;
138 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
139 to optimize in process_options (). */
140 #define AUTODETECT_VALUE 2
142 /* Name to use as base of names for dump output files. */
144 const char *dump_base_name
;
146 /* Directory used for dump output files. */
148 const char *dump_dir_name
;
150 /* Name to use as a base for auxiliary output files. */
152 const char *aux_base_name
;
154 /* Prefix for profile data files */
155 const char *profile_data_prefix
;
157 /* A mask of target_flags that includes bit X if X was set or cleared
158 on the command line. */
160 int target_flags_explicit
;
162 /* Debug hooks - dependent upon command line options. */
164 const struct gcc_debug_hooks
*debug_hooks
;
166 /* Other flags saying which kinds of debugging dump have been requested. */
168 int rtl_dump_and_exit
;
169 int flag_print_asm_name
;
170 enum graph_dump_types graph_dump_format
;
172 /* Name for output file of assembly code, specified with -o. */
174 const char *asm_file_name
;
176 /* Nonzero means do optimizations. -O.
177 Particular numeric values stand for particular amounts of optimization;
178 thus, -O2 stores 2 here. However, the optimizations beyond the basic
179 ones are not controlled directly by this variable. Instead, they are
180 controlled by individual `flag_...' variables that are defaulted
181 based on this variable. */
185 /* Nonzero means optimize for size. -Os.
186 The only valid values are zero and nonzero. When optimize_size is
187 nonzero, optimize defaults to 2, but certain individual code
188 bloating optimizations are disabled. */
190 int optimize_size
= 0;
192 /* True if this is the lto front end. This is used to disable
193 gimple generation and lowering passes that are normally run on the
194 output of a front end. These passes must be bypassed for lto since
195 they have already been done before the gimple was written. */
197 bool in_lto_p
= false;
199 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
201 int flag_generate_lto
;
203 /* The FUNCTION_DECL for the function currently being compiled,
204 or 0 if between functions. */
205 tree current_function_decl
;
207 /* Set to the FUNC_BEGIN label of the current function, or NULL
209 const char * current_function_func_begin_label
;
211 /* A random sequence of characters, unless overridden by user. */
212 static const char *flag_random_seed
;
214 /* A local time stamp derived from the time of compilation. It will be
215 zero if the system cannot provide a time. It will be -1u, if the
216 user has specified a particular random seed. */
221 /* 0 means straightforward implementation of complex divide acceptable.
222 1 means wide ranges of inputs must work for complex divide.
223 2 means C99-like requirements for complex multiply and divide. */
225 int flag_complex_method
= 1;
227 /* Nonzero means we should be saving declaration info into a .X file. */
229 int flag_gen_aux_info
= 0;
231 /* Specified name of aux-info file. */
233 const char *aux_info_file_name
;
235 /* Nonzero if we are compiling code for a shared library, zero for
240 /* Generate code for GNU or NeXT Objective-C runtime environment. */
242 #ifdef NEXT_OBJC_RUNTIME
243 int flag_next_runtime
= 1;
245 int flag_next_runtime
= 0;
248 /* Set to the default thread-local storage (tls) model to use. */
250 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
252 /* Set the default region and algorithm for the integrated register
255 enum ira_algorithm flag_ira_algorithm
= IRA_ALGORITHM_CB
;
256 enum ira_region flag_ira_region
= IRA_REGION_MIXED
;
258 /* Set the default for excess precision. */
260 enum excess_precision flag_excess_precision_cmdline
= EXCESS_PRECISION_DEFAULT
;
261 enum excess_precision flag_excess_precision
= EXCESS_PRECISION_DEFAULT
;
263 /* Nonzero means change certain warnings into errors.
264 Usually these are warnings about failure to conform to some standard. */
266 int flag_pedantic_errors
= 0;
268 /* Nonzero means make permerror produce warnings instead of errors. */
270 int flag_permissive
= 0;
272 /* -dA causes debug commentary information to be produced in
273 the generated assembly code (to make it more readable). This option
274 is generally only of use to those who actually need to read the
275 generated assembly code (perhaps while debugging the compiler itself).
276 Currently, this switch is only used by dwarfout.c; however, it is intended
277 to be a catchall for printing debug information in the assembler file. */
279 int flag_debug_asm
= 0;
281 /* -dP causes the rtl to be emitted as a comment in assembly. */
283 int flag_dump_rtl_in_asm
= 0;
285 /* When non-NULL, indicates that whenever space is allocated on the
286 stack, the resulting stack pointer must not pass this
287 address---that is, for stacks that grow downward, the stack pointer
288 must always be greater than or equal to this address; for stacks
289 that grow upward, the stack pointer must be less than this address.
290 At present, the rtx may be either a REG or a SYMBOL_REF, although
291 the support provided depends on the backend. */
294 /* Positive if we should track variables, negative if we should run
295 the var-tracking pass only to discard debug annotations, zero if
296 we're not to run it. When flag_var_tracking == AUTODETECT_VALUE it
297 will be set according to optimize, debug_info_level and debug_hooks
298 in process_options (). */
299 int flag_var_tracking
= AUTODETECT_VALUE
;
301 /* Positive if we should track variables at assignments, negative if
302 we should run the var-tracking pass only to discard debug
303 annotations. When flag_var_tracking_assignments ==
304 AUTODETECT_VALUE it will be set according to flag_var_tracking. */
305 int flag_var_tracking_assignments
= AUTODETECT_VALUE
;
307 /* Nonzero if we should toggle flag_var_tracking_assignments after
308 processing options and computing its default. */
309 int flag_var_tracking_assignments_toggle
= 0;
311 /* Type of stack check. */
312 enum stack_check_type flag_stack_check
= NO_STACK_CHECK
;
314 /* True if the user has tagged the function with the 'section'
317 bool user_defined_section_attribute
= false;
319 /* Values of the -falign-* flags: how much to align labels in code.
320 0 means `use default', 1 means `don't align'.
321 For each variable, there is an _log variant which is the power
322 of two not less than the variable, for .align output. */
325 int align_loops_max_skip
;
327 int align_jumps_max_skip
;
328 int align_labels_log
;
329 int align_labels_max_skip
;
330 int align_functions_log
;
334 const char *const string
;
338 lang_independent_options
;
340 /* Nonzero if subexpressions must be evaluated from left-to-right. */
341 int flag_evaluation_order
= 0;
343 /* The user symbol prefix after having resolved same. */
344 const char *user_label_prefix
;
346 static const param_info lang_independent_params
[] = {
347 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
348 { OPTION, DEFAULT, false, MIN, MAX, HELP },
349 #include "params.def"
351 { NULL
, 0, false, 0, 0, NULL
}
354 /* Output files for assembler code (real compiler output)
355 and debugging dumps. */
359 FILE *dump_file
= NULL
;
360 const char *dump_file_name
;
362 /* The current working directory of a translation. It's generally the
363 directory from which compilation was initiated, but a preprocessed
364 file may specify the original directory in which it was
367 static const char *src_pwd
;
369 /* Initialize src_pwd with the given string, and return true. If it
370 was already initialized, return false. As a special case, it may
371 be called with a NULL argument to test whether src_pwd has NOT been
375 set_src_pwd (const char *pwd
)
379 if (strcmp (src_pwd
, pwd
) == 0)
385 src_pwd
= xstrdup (pwd
);
389 /* Return the directory from which the translation unit was initiated,
390 in case set_src_pwd() was not called before to assign it a
406 /* Called when the start of a function definition is parsed,
407 this function prints on stderr the name of the function. */
409 announce_function (tree decl
)
413 if (rtl_dump_and_exit
)
414 fprintf (stderr
, "%s ",
415 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl
))));
417 fprintf (stderr
, " %s",
418 identifier_to_locale (lang_hooks
.decl_printable_name (decl
, 2)));
420 pp_needs_newline (global_dc
->printer
) = true;
421 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
425 /* Initialize local_tick with the time of day, or -1 if
426 flag_random_seed is set. */
429 init_local_tick (void)
431 if (!flag_random_seed
)
433 /* Get some more or less random data. */
434 #ifdef HAVE_GETTIMEOFDAY
438 gettimeofday (&tv
, NULL
);
439 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
443 time_t now
= time (NULL
);
445 if (now
!= (time_t)-1)
446 local_tick
= (unsigned) now
;
454 /* Set up a default flag_random_seed and local_tick, unless the user
455 already specified one. Must be called after init_local_tick. */
458 init_random_seed (void)
460 unsigned HOST_WIDE_INT value
;
461 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
463 value
= local_tick
^ getpid ();
465 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
466 flag_random_seed
= random_seed
;
469 /* Obtain the random_seed string. Unless NOINIT, initialize it if
470 it's not provided in the command line. */
473 get_random_seed (bool noinit
)
475 if (!flag_random_seed
&& !noinit
)
477 return flag_random_seed
;
480 /* Modify the random_seed string to VAL. Return its previous
484 set_random_seed (const char *val
)
486 const char *old
= flag_random_seed
;
487 flag_random_seed
= val
;
491 /* Decode the string P as an integral parameter.
492 If the string is indeed an integer return its numeric value else
493 issue an Invalid Option error for the option PNAME and return DEFVAL.
494 If PNAME is zero just return DEFVAL, do not call error. */
497 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
499 const char *endp
= p
;
512 error ("invalid option argument %qs", pname
);
519 #if GCC_VERSION < 3004
521 /* The functions floor_log2 and exact_log2 are defined as inline
522 functions in toplev.h if GCC_VERSION >= 3004. The definitions here
523 are used for older versions of gcc. */
525 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
526 If X is 0, return -1. */
529 floor_log2 (unsigned HOST_WIDE_INT x
)
536 if (HOST_BITS_PER_WIDE_INT
> 64)
537 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
539 if (HOST_BITS_PER_WIDE_INT
> 32)
540 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
542 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
544 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
546 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
548 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
550 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
556 /* Return the logarithm of X, base 2, considering X unsigned,
557 if X is a power of 2. Otherwise, returns -1. */
560 exact_log2 (unsigned HOST_WIDE_INT x
)
564 return floor_log2 (x
);
567 #endif /* GCC_VERSION < 3004 */
569 /* Handler for fatal signals, such as SIGSEGV. These are transformed
570 into ICE messages, which is much more user friendly. In case the
571 error printer crashes, reset the signal to prevent infinite recursion. */
574 crash_signal (int signo
)
576 signal (signo
, SIG_DFL
);
578 /* If we crashed while processing an ASM statement, then be a little more
579 graceful. It's most likely the user's fault. */
580 if (this_is_asm_operands
)
582 output_operand_lossage ("unrecoverable error");
583 exit (FATAL_EXIT_CODE
);
586 internal_error ("%s", strsignal (signo
));
589 /* Arrange to dump core on error. (The regular error message is still
590 printed first, except in the case of abort().) */
593 setup_core_dumping (void)
596 signal (SIGABRT
, SIG_DFL
);
598 #if defined(HAVE_SETRLIMIT)
601 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
602 fatal_error ("getting core file size maximum limit: %m");
603 rlim
.rlim_cur
= rlim
.rlim_max
;
604 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
605 fatal_error ("setting core file size limit to maximum: %m");
608 diagnostic_abort_on_error (global_dc
);
612 /* Strip off a legitimate source ending from the input string NAME of
613 length LEN. Rather than having to know the names used by all of
614 our front ends, we strip off an ending of a period followed by
615 up to five characters. (Java uses ".class".) */
618 strip_off_ending (char *name
, int len
)
621 for (i
= 2; i
< 6 && len
> i
; i
++)
623 if (name
[len
- i
] == '.')
625 name
[len
- i
] = '\0';
631 /* Output a quoted string. */
634 output_quoted_string (FILE *asm_file
, const char *string
)
636 #ifdef OUTPUT_QUOTED_STRING
637 OUTPUT_QUOTED_STRING (asm_file
, string
);
641 putc ('\"', asm_file
);
642 while ((c
= *string
++) != 0)
646 if (c
== '\"' || c
== '\\')
647 putc ('\\', asm_file
);
651 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
653 putc ('\"', asm_file
);
657 /* Output a file name in the form wanted by System V. */
660 output_file_directive (FILE *asm_file
, const char *input_name
)
665 if (input_name
== NULL
)
666 input_name
= "<stdin>";
668 input_name
= remap_debug_filename (input_name
);
670 len
= strlen (input_name
);
671 na
= input_name
+ len
;
673 /* NA gets INPUT_NAME sans directory names. */
674 while (na
> input_name
)
676 if (IS_DIR_SEPARATOR (na
[-1]))
681 #ifdef ASM_OUTPUT_SOURCE_FILENAME
682 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
684 fprintf (asm_file
, "\t.file\t");
685 output_quoted_string (asm_file
, na
);
686 putc ('\n', asm_file
);
690 /* A subroutine of wrapup_global_declarations. We've come to the end of
691 the compilation unit. All deferred variables should be undeferred,
692 and all incomplete decls should be finalized. */
695 wrapup_global_declaration_1 (tree decl
)
697 /* We're not deferring this any longer. Assignment is conditional to
698 avoid needlessly dirtying PCH pages. */
699 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
700 && DECL_DEFER_OUTPUT (decl
) != 0)
701 DECL_DEFER_OUTPUT (decl
) = 0;
703 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
704 lang_hooks
.finish_incomplete_decl (decl
);
707 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
708 needs to be output. Return true if it is output. */
711 wrapup_global_declaration_2 (tree decl
)
713 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
716 /* Don't write out static consts, unless we still need them.
718 We also keep static consts if not optimizing (for debugging),
719 unless the user specified -fno-keep-static-consts.
720 ??? They might be better written into the debug information.
721 This is possible when using DWARF.
723 A language processor that wants static constants to be always
724 written out (even if it is not used) is responsible for
725 calling rest_of_decl_compilation itself. E.g. the C front-end
726 calls rest_of_decl_compilation from finish_decl.
727 One motivation for this is that is conventional in some
728 environments to write things like:
729 static const char rcsid[] = "... version string ...";
730 intending to force the string to be in the executable.
732 A language processor that would prefer to have unneeded
733 static constants "optimized away" would just defer writing
734 them out until here. E.g. C++ does this, because static
735 constants are often defined in header files.
737 ??? A tempting alternative (for both C and C++) would be
738 to force a constant to be written if and only if it is
739 defined in a main file, as opposed to an include file. */
741 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
743 struct varpool_node
*node
;
745 node
= varpool_get_node (decl
);
747 if (!node
&& flag_ltrans
)
749 else if (node
&& node
->finalized
)
751 else if (node
&& node
->alias
)
753 else if (!cgraph_global_info_ready
755 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
757 else if (node
&& node
->needed
)
759 else if (DECL_COMDAT (decl
))
761 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
762 && (optimize
|| !flag_keep_static_consts
763 || DECL_ARTIFICIAL (decl
)))
768 rest_of_decl_compilation (decl
, 1, 1);
776 /* Do any final processing required for the declarations in VEC, of
777 which there are LEN. We write out inline functions and variables
778 that have been deferred until this point, but which are required.
779 Returns nonzero if anything was put out. */
782 wrapup_global_declarations (tree
*vec
, int len
)
784 bool reconsider
, output_something
= false;
787 for (i
= 0; i
< len
; i
++)
788 wrapup_global_declaration_1 (vec
[i
]);
790 /* Now emit any global variables or functions that we have been
791 putting off. We need to loop in case one of the things emitted
792 here references another one which comes earlier in the list. */
796 for (i
= 0; i
< len
; i
++)
797 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
799 output_something
= true;
803 return output_something
;
806 /* A subroutine of check_global_declarations. Issue appropriate warnings
807 for the global declaration DECL. */
810 check_global_declaration_1 (tree decl
)
812 /* Warn about any function declared static but not defined. We don't
813 warn about variables, because many programs have static variables
814 that exist only to get some text into the object file. */
815 if (TREE_CODE (decl
) == FUNCTION_DECL
816 && DECL_INITIAL (decl
) == 0
817 && DECL_EXTERNAL (decl
)
818 && ! DECL_ARTIFICIAL (decl
)
819 && ! TREE_NO_WARNING (decl
)
820 && ! TREE_PUBLIC (decl
)
821 && (warn_unused_function
822 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
824 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
825 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
827 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
828 /* This symbol is effectively an "extern" declaration now. */
829 TREE_PUBLIC (decl
) = 1;
830 assemble_external (decl
);
833 /* Warn about static fns or vars defined but not used. */
834 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
835 /* We don't warn about "static const" variables because the
836 "rcs_id" idiom uses that construction. */
837 || (warn_unused_variable
838 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
839 && ! DECL_IN_SYSTEM_HEADER (decl
)
840 && ! TREE_USED (decl
)
841 /* The TREE_USED bit for file-scope decls is kept in the identifier,
842 to handle multiple external decls in different scopes. */
843 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
844 && ! DECL_EXTERNAL (decl
)
845 && ! TREE_PUBLIC (decl
)
846 /* A volatile variable might be used in some non-obvious way. */
847 && ! TREE_THIS_VOLATILE (decl
)
848 /* Global register variables must be declared to reserve them. */
849 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
850 /* Otherwise, ask the language. */
851 && lang_hooks
.decls
.warn_unused_global (decl
))
852 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
853 ? OPT_Wunused_function
854 : OPT_Wunused_variable
,
855 "%q+D defined but not used", decl
);
858 /* Issue appropriate warnings for the global declarations in VEC (of
859 which there are LEN). */
862 check_global_declarations (tree
*vec
, int len
)
866 for (i
= 0; i
< len
; i
++)
867 check_global_declaration_1 (vec
[i
]);
870 /* Emit debugging information for all global declarations in VEC. */
873 emit_debug_global_declarations (tree
*vec
, int len
)
877 /* Avoid confusing the debug information machinery when there are errors. */
881 timevar_push (TV_SYMOUT
);
882 for (i
= 0; i
< len
; i
++)
883 debug_hooks
->global_decl (vec
[i
]);
884 timevar_pop (TV_SYMOUT
);
887 /* Warn about a use of an identifier which was marked deprecated. */
889 warn_deprecated_use (tree node
, tree attr
)
893 if (node
== 0 || !warn_deprecated_decl
)
899 attr
= DECL_ATTRIBUTES (node
);
900 else if (TYPE_P (node
))
902 tree decl
= TYPE_STUB_DECL (node
);
904 attr
= lookup_attribute ("deprecated",
905 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
910 attr
= lookup_attribute ("deprecated", attr
);
913 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
919 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
921 warning (OPT_Wdeprecated_declarations
,
922 "%qD is deprecated (declared at %s:%d): %s",
923 node
, xloc
.file
, xloc
.line
, msg
);
925 warning (OPT_Wdeprecated_declarations
,
926 "%qD is deprecated (declared at %s:%d)",
927 node
, xloc
.file
, xloc
.line
);
929 else if (TYPE_P (node
))
931 tree what
= NULL_TREE
;
932 tree decl
= TYPE_STUB_DECL (node
);
934 if (TYPE_NAME (node
))
936 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
937 what
= TYPE_NAME (node
);
938 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
939 && DECL_NAME (TYPE_NAME (node
)))
940 what
= DECL_NAME (TYPE_NAME (node
));
945 expanded_location xloc
946 = expand_location (DECL_SOURCE_LOCATION (decl
));
950 warning (OPT_Wdeprecated_declarations
,
951 "%qE is deprecated (declared at %s:%d): %s",
952 what
, xloc
.file
, xloc
.line
, msg
);
954 warning (OPT_Wdeprecated_declarations
,
955 "%qE is deprecated (declared at %s:%d)", what
,
956 xloc
.file
, xloc
.line
);
961 warning (OPT_Wdeprecated_declarations
,
962 "type is deprecated (declared at %s:%d): %s",
963 xloc
.file
, xloc
.line
, msg
);
965 warning (OPT_Wdeprecated_declarations
,
966 "type is deprecated (declared at %s:%d)",
967 xloc
.file
, xloc
.line
);
975 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
978 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
983 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
986 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
992 /* Compile an entire translation unit. Write a file of assembly
993 output and various debugging dumps. */
998 /* Initialize yet another pass. */
1000 ggc_protect_identifiers
= true;
1003 init_final (main_input_filename
);
1004 coverage_init (aux_base_name
);
1006 invoke_plugin_callbacks (PLUGIN_START_UNIT
, NULL
);
1008 timevar_push (TV_PARSE
);
1010 /* Call the parser, which parses the entire file (calling
1011 rest_of_compilation for each function). */
1012 lang_hooks
.parse_file (set_yydebug
);
1014 /* Compilation is now finished except for writing
1015 what's left of the symbol table output. */
1016 timevar_pop (TV_PARSE
);
1018 if (flag_syntax_only
|| flag_wpa
)
1021 ggc_protect_identifiers
= false;
1023 /* This must also call cgraph_finalize_compilation_unit. */
1024 lang_hooks
.decls
.final_write_globals ();
1029 /* Ensure that emulated TLS control vars are finalized and build
1030 a static constructor for them, when it is required. */
1031 if (!targetm
.have_tls
)
1034 varpool_assemble_pending_decls ();
1035 finish_aliases_2 ();
1037 /* Likewise for mudflap static object registrations. */
1039 mudflap_finish_file ();
1041 output_shared_constant_pool ();
1042 output_object_blocks ();
1044 /* Write out any pending weak symbol declarations. */
1047 /* This must be at the end before unwind and debug info.
1048 Some target ports emit PIC setup thunks here. */
1049 targetm
.asm_out
.code_end ();
1051 /* Do dbx symbols. */
1052 timevar_push (TV_SYMOUT
);
1054 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1055 if (dwarf2out_do_frame ())
1056 dwarf2out_frame_finish ();
1059 (*debug_hooks
->finish
) (main_input_filename
);
1060 timevar_pop (TV_SYMOUT
);
1062 /* Output some stuff at end of file if nec. */
1064 dw2_output_indirect_constants ();
1066 /* Flush any pending external directives. */
1067 process_pending_assemble_externals ();
1069 /* Emit LTO marker if LTO info has been previously emitted. This is
1070 used by collect2 to determine whether an object file contains IL.
1071 We used to emit an undefined reference here, but this produces
1072 link errors if an object file with IL is stored into a shared
1073 library without invoking lto1. */
1074 if (flag_generate_lto
)
1076 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1077 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file
, NULL_TREE
,
1079 (unsigned HOST_WIDE_INT
) 1, 8);
1080 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1081 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file
, "__gnu_lto_v1",
1082 (unsigned HOST_WIDE_INT
) 1, 8);
1084 ASM_OUTPUT_COMMON (asm_out_file
, "__gnu_lto_v1",
1085 (unsigned HOST_WIDE_INT
) 1,
1086 (unsigned HOST_WIDE_INT
) 1);
1090 /* Attach a special .ident directive to the end of the file to identify
1091 the version of GCC which compiled this code. The format of the .ident
1092 string is patterned after the ones produced by native SVR4 compilers. */
1096 const char *pkg_version
= "(GNU) ";
1098 if (strcmp ("(GCC) ", pkgversion_string
))
1099 pkg_version
= pkgversion_string
;
1100 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
1101 IDENT_ASM_OP
, pkg_version
, version_string
);
1105 /* Invoke registered plugin callbacks. */
1106 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT
, NULL
);
1108 /* This must be at the end. Some target ports emit end of file directives
1109 into the assembly file here, and hence we can not output anything to the
1110 assembly file after this point. */
1111 targetm
.asm_out
.file_end ();
1114 /* Parse a -d... command line switch. */
1117 decode_d_option (const char *arg
)
1128 flag_print_asm_name
= 1;
1131 flag_dump_rtl_in_asm
= 1;
1132 flag_print_asm_name
= 1;
1135 graph_dump_format
= vcg
;
1138 rtl_dump_and_exit
= 1;
1143 case 'D': /* These are handled by the preprocessor. */
1150 setup_core_dumping();
1153 enable_rtl_dump_file ();
1157 warning (0, "unrecognized gcc debugging option: %c", c
);
1162 /* Indexed by enum debug_info_type. */
1163 const char *const debug_type_names
[] =
1165 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1168 /* Print version information to FILE.
1169 Each line begins with INDENT (for the case where FILE is the
1170 assembler output file). */
1173 print_version (FILE *file
, const char *indent
)
1175 static const char fmt1
[] =
1177 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1179 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1182 static const char fmt2
[] =
1183 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1184 static const char fmt3
[] =
1185 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1186 static const char fmt4
[] =
1187 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1189 #define __VERSION__ "[?]"
1192 file
== stderr
? _(fmt1
) : fmt1
,
1193 indent
, *indent
!= 0 ? " " : "",
1194 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
1195 indent
, __VERSION__
);
1197 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1198 two string formats, "i.j.k" and "i.j" when k is zero. As of
1199 gmp-4.3.0, GMP always uses the 3 number format. */
1200 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1201 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1202 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1203 #define GCC_GMP_VERSION \
1204 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1205 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1206 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1207 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1209 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1210 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1211 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1214 file
== stderr
? _(fmt2
) : fmt2
,
1215 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
, MPC_VERSION_STRING
);
1216 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
1218 file
== stderr
? _(fmt3
) : fmt3
,
1219 indent
, *indent
!= 0 ? " " : "",
1220 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
1221 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
1223 file
== stderr
? _(fmt3
) : fmt3
,
1224 indent
, *indent
!= 0 ? " " : "",
1225 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
1226 if (strcmp (MPC_VERSION_STRING
, mpc_get_version ()))
1228 file
== stderr
? _(fmt3
) : fmt3
,
1229 indent
, *indent
!= 0 ? " " : "",
1230 "MPC", MPC_VERSION_STRING
, mpc_get_version ());
1232 file
== stderr
? _(fmt4
) : fmt4
,
1233 indent
, *indent
!= 0 ? " " : "",
1234 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1236 print_plugins_versions (file
, indent
);
1239 #ifdef ASM_COMMENT_START
1241 print_to_asm_out_file (print_switch_type type
, const char * text
)
1243 bool prepend_sep
= true;
1247 case SWITCH_TYPE_LINE_END
:
1248 putc ('\n', asm_out_file
);
1251 case SWITCH_TYPE_LINE_START
:
1252 fputs (ASM_COMMENT_START
, asm_out_file
);
1253 return strlen (ASM_COMMENT_START
);
1255 case SWITCH_TYPE_DESCRIPTIVE
:
1256 if (ASM_COMMENT_START
[0] == 0)
1257 prepend_sep
= false;
1259 case SWITCH_TYPE_PASSED
:
1260 case SWITCH_TYPE_ENABLED
:
1262 fputc (' ', asm_out_file
);
1263 fputs (text
, asm_out_file
);
1264 /* No need to return the length here as
1265 print_single_switch has already done it. */
1275 print_to_stderr (print_switch_type type
, const char * text
)
1279 case SWITCH_TYPE_LINE_END
:
1280 putc ('\n', stderr
);
1283 case SWITCH_TYPE_LINE_START
:
1286 case SWITCH_TYPE_PASSED
:
1287 case SWITCH_TYPE_ENABLED
:
1288 fputc (' ', stderr
);
1291 case SWITCH_TYPE_DESCRIPTIVE
:
1292 fputs (text
, stderr
);
1293 /* No need to return the length here as
1294 print_single_switch has already done it. */
1302 /* Print an option value and return the adjusted position in the line.
1303 ??? print_fn doesn't handle errors, eg disk full; presumably other
1304 code will catch a disk full though. */
1307 print_single_switch (print_switch_fn_type print_fn
,
1309 print_switch_type type
,
1312 /* The ultrix fprintf returns 0 on success, so compute the result
1313 we want here since we need it for the following test. The +1
1314 is for the separator character that will probably be emitted. */
1315 int len
= strlen (text
) + 1;
1318 && pos
+ len
> MAX_LINE
)
1320 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1325 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
1327 print_fn (type
, text
);
1331 /* Print active target switches using PRINT_FN.
1332 POS is the current cursor position and MAX is the size of a "line".
1333 Each line begins with INDENT and ends with TERM.
1334 Each switch is separated from the next by SEP. */
1337 print_switch_values (print_switch_fn_type print_fn
)
1343 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1344 that it can be printed below. This helps reproducibility. */
1345 if (!flag_random_seed
)
1346 init_random_seed ();
1348 /* Print the options as passed. */
1349 pos
= print_single_switch (print_fn
, pos
,
1350 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
1352 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1357 if (strcmp (*p
, "-o") == 0
1358 || strcmp (*p
, "-dumpbase") == 0
1359 || strcmp (*p
, "-dumpdir") == 0
1360 || strcmp (*p
, "-auxbase") == 0)
1367 if (strcmp (*p
, "-quiet") == 0
1368 || strcmp (*p
, "-version") == 0)
1375 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
, *p
);
1379 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1381 /* Print the -f and -m options that have been enabled.
1382 We don't handle language specific options but printing argv
1384 pos
= print_single_switch (print_fn
, 0,
1385 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
1387 for (j
= 0; j
< cl_options_count
; j
++)
1388 if ((cl_options
[j
].flags
& CL_REPORT
)
1389 && option_enabled (j
) > 0)
1390 pos
= print_single_switch (print_fn
, pos
,
1391 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
1393 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1396 /* Open assembly code output file. Do this even if -fsyntax-only is
1397 on, because then the driver will have provided the name of a
1398 temporary file or bit bucket for us. NAME is the file specified on
1399 the command line, possibly NULL. */
1401 init_asm_output (const char *name
)
1403 if (name
== NULL
&& asm_file_name
== 0)
1404 asm_out_file
= stdout
;
1407 if (asm_file_name
== 0)
1409 int len
= strlen (dump_base_name
);
1410 char *dumpname
= XNEWVEC (char, len
+ 6);
1412 memcpy (dumpname
, dump_base_name
, len
+ 1);
1413 strip_off_ending (dumpname
, len
);
1414 strcat (dumpname
, ".s");
1415 asm_file_name
= dumpname
;
1417 if (!strcmp (asm_file_name
, "-"))
1418 asm_out_file
= stdout
;
1420 asm_out_file
= fopen (asm_file_name
, "w+b");
1421 if (asm_out_file
== 0)
1422 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1425 if (!flag_syntax_only
)
1427 targetm
.asm_out
.file_start ();
1429 if (flag_record_gcc_switches
)
1431 if (targetm
.asm_out
.record_gcc_switches
)
1433 /* Let the target know that we are about to start recording. */
1434 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1436 /* Now record the switches. */
1437 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1438 /* Let the target know that the recording is over. */
1439 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1443 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
1446 #ifdef ASM_COMMENT_START
1447 if (flag_verbose_asm
)
1449 /* Print the list of switches in effect
1450 into the assembler file as comments. */
1451 print_version (asm_out_file
, ASM_COMMENT_START
);
1452 print_switch_values (print_to_asm_out_file
);
1453 putc ('\n', asm_out_file
);
1459 /* Return true if the state of option OPTION should be stored in PCH files
1460 and checked by default_pch_valid_p. Store the option's current state
1464 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1466 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1468 if (cl_options
[option
].flag_var
== &target_flags
)
1469 if (targetm
.check_pch_target_flags
)
1471 return get_option_state (option
, state
);
1474 /* Default version of get_pch_validity.
1475 By default, every flag difference is fatal; that will be mostly right for
1476 most targets, but completely right for very few. */
1479 default_get_pch_validity (size_t *sz
)
1481 struct cl_option_state state
;
1486 if (targetm
.check_pch_target_flags
)
1487 *sz
+= sizeof (target_flags
);
1488 for (i
= 0; i
< cl_options_count
; i
++)
1489 if (option_affects_pch_p (i
, &state
))
1492 result
= r
= XNEWVEC (char, *sz
);
1496 if (targetm
.check_pch_target_flags
)
1498 memcpy (r
, &target_flags
, sizeof (target_flags
));
1499 r
+= sizeof (target_flags
);
1502 for (i
= 0; i
< cl_options_count
; i
++)
1503 if (option_affects_pch_p (i
, &state
))
1505 memcpy (r
, state
.data
, state
.size
);
1512 /* Return a message which says that a PCH file was created with a different
1513 setting of OPTION. */
1516 pch_option_mismatch (const char *option
)
1520 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1522 return _("out of memory");
1526 /* Default version of pch_valid_p. */
1529 default_pch_valid_p (const void *data_p
, size_t len
)
1531 struct cl_option_state state
;
1532 const char *data
= (const char *)data_p
;
1535 /* -fpic and -fpie also usually make a PCH invalid. */
1536 if (data
[0] != flag_pic
)
1537 return _("created and used with different settings of -fpic");
1538 if (data
[1] != flag_pie
)
1539 return _("created and used with different settings of -fpie");
1542 /* Check target_flags. */
1543 if (targetm
.check_pch_target_flags
)
1548 memcpy (&tf
, data
, sizeof (target_flags
));
1549 data
+= sizeof (target_flags
);
1550 len
-= sizeof (target_flags
);
1551 r
= targetm
.check_pch_target_flags (tf
);
1556 for (i
= 0; i
< cl_options_count
; i
++)
1557 if (option_affects_pch_p (i
, &state
))
1559 if (memcmp (data
, state
.data
, state
.size
) != 0)
1560 return pch_option_mismatch (cl_options
[i
].opt_text
);
1568 /* Default tree printer. Handles declarations only. */
1570 default_tree_printer (pretty_printer
*pp
, text_info
*text
, const char *spec
,
1571 int precision
, bool wide
, bool set_locus
, bool hash
)
1575 /* FUTURE: %+x should set the locus. */
1576 if (precision
!= 0 || wide
|| hash
)
1582 t
= va_arg (*text
->args_ptr
, tree
);
1583 if (TREE_CODE (t
) == IDENTIFIER_NODE
)
1585 pp_identifier (pp
, IDENTIFIER_POINTER (t
));
1591 t
= va_arg (*text
->args_ptr
, tree
);
1592 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1593 t
= DECL_DEBUG_EXPR (t
);
1598 t
= va_arg (*text
->args_ptr
, tree
);
1602 percent_K_format (text
);
1609 if (set_locus
&& text
->locus
)
1610 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1614 const char *n
= DECL_NAME (t
)
1615 ? identifier_to_locale (lang_hooks
.decl_printable_name (t
, 2))
1620 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1625 /* A helper function; used as the reallocator function for cpp's line
1628 realloc_for_line_map (void *ptr
, size_t len
)
1630 return GGC_RESIZEVAR (void, ptr
, len
);
1633 /* A helper function: used as the allocator function for
1634 identifier_to_locale. */
1636 alloc_for_identifier_to_locale (size_t len
)
1638 return ggc_alloc_atomic (len
);
1641 /* Initialization of the front end environment, before command line
1642 options are parsed. Signal handlers, internationalization etc.
1643 ARGV0 is main's argv[0]. */
1645 general_init (const char *argv0
)
1649 p
= argv0
+ strlen (argv0
);
1650 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1654 xmalloc_set_program_name (progname
);
1658 /* Unlock the stdio streams. */
1659 unlock_std_streams ();
1661 gcc_init_libintl ();
1663 identifier_to_locale_alloc
= alloc_for_identifier_to_locale
;
1664 identifier_to_locale_free
= ggc_free
;
1666 /* Initialize the diagnostics reporting machinery, so option parsing
1667 can give warnings and errors. */
1668 diagnostic_initialize (global_dc
, N_OPTS
);
1669 diagnostic_starter (global_dc
) = default_tree_diagnostic_starter
;
1670 /* Set a default printer. Language specific initializations will
1671 override it later. */
1672 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1673 global_dc
->show_option_requested
= flag_diagnostics_show_option
;
1674 global_dc
->show_column
= flag_show_column
;
1675 global_dc
->internal_error
= plugins_internal_error_function
;
1676 global_dc
->option_enabled
= option_enabled
;
1677 global_dc
->option_name
= option_name
;
1679 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1681 signal (SIGSEGV
, crash_signal
);
1684 signal (SIGILL
, crash_signal
);
1687 signal (SIGBUS
, crash_signal
);
1690 signal (SIGABRT
, crash_signal
);
1692 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1693 signal (SIGIOT
, crash_signal
);
1696 signal (SIGFPE
, crash_signal
);
1699 /* Other host-specific signal setup. */
1700 (*host_hooks
.extra_signals
)();
1702 /* Initialize the garbage-collector, string pools and tree type hash
1706 line_table
= ggc_alloc_line_maps ();
1707 linemap_init (line_table
);
1708 line_table
->reallocator
= realloc_for_line_map
;
1711 /* Initialize register usage now so switches may override. */
1714 /* Register the language-independent parameters. */
1715 add_params (lang_independent_params
, LAST_PARAM
);
1717 /* This must be done after add_params but before argument processing. */
1718 init_ggc_heuristics();
1719 init_optimization_passes ();
1720 statistics_early_init ();
1723 /* Return true if the current target supports -fsection-anchors. */
1726 target_supports_section_anchors_p (void)
1728 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1731 if (targetm
.asm_out
.output_anchor
== NULL
)
1737 /* Default the align_* variables to 1 if they're still unset, and
1738 set up the align_*_log variables. */
1740 init_alignments (void)
1742 if (align_loops
<= 0)
1744 if (align_loops_max_skip
> align_loops
)
1745 align_loops_max_skip
= align_loops
- 1;
1746 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1747 if (align_jumps
<= 0)
1749 if (align_jumps_max_skip
> align_jumps
)
1750 align_jumps_max_skip
= align_jumps
- 1;
1751 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1752 if (align_labels
<= 0)
1754 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1755 if (align_labels_max_skip
> align_labels
)
1756 align_labels_max_skip
= align_labels
- 1;
1757 if (align_functions
<= 0)
1758 align_functions
= 1;
1759 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1762 /* Process the options that have been parsed. */
1764 process_options (void)
1766 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1767 This can happen with incorrect pre-processed input. */
1768 debug_hooks
= &do_nothing_debug_hooks
;
1770 /* This replaces set_Wunused. */
1771 if (warn_unused_function
== -1)
1772 warn_unused_function
= warn_unused
;
1773 if (warn_unused_label
== -1)
1774 warn_unused_label
= warn_unused
;
1775 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1776 if (warn_unused_parameter
== -1)
1777 warn_unused_parameter
= (warn_unused
&& extra_warnings
);
1778 if (warn_unused_variable
== -1)
1779 warn_unused_variable
= warn_unused
;
1780 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1782 if (warn_unused_but_set_parameter
== -1)
1783 warn_unused_but_set_parameter
= (warn_unused
&& extra_warnings
);
1784 if (warn_unused_but_set_variable
== -1)
1785 warn_unused_but_set_variable
= warn_unused
;
1786 if (warn_unused_value
== -1)
1787 warn_unused_value
= warn_unused
;
1789 /* This replaces set_Wextra. */
1790 if (warn_uninitialized
== -1)
1791 warn_uninitialized
= extra_warnings
;
1793 /* Allow the front end to perform consistency checks and do further
1794 initialization based on the command line options. This hook also
1795 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1796 so we can correctly initialize debug output. */
1797 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1799 #ifdef OVERRIDE_OPTIONS
1800 /* Some machines may reject certain combinations of options. */
1804 /* Avoid any informative notes in the second run of -fcompare-debug. */
1805 if (flag_compare_debug
)
1806 diagnostic_inhibit_notes (global_dc
);
1808 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1810 warning (OPT_fsection_anchors
,
1811 "this target does not support %qs", "-fsection-anchors");
1812 flag_section_anchors
= 0;
1815 if (flag_short_enums
== 2)
1816 flag_short_enums
= targetm
.default_short_enums ();
1818 /* Set aux_base_name if not already set. */
1821 else if (main_input_filename
)
1823 char *name
= xstrdup (lbasename (main_input_filename
));
1825 strip_off_ending (name
, strlen (name
));
1826 aux_base_name
= name
;
1829 aux_base_name
= "gccaux";
1834 || flag_loop_interchange
1835 || flag_loop_strip_mine
1836 || flag_graphite_identity
1837 || flag_loop_parallelize_all
)
1838 sorry ("Graphite loop optimizations cannot be used");
1841 /* Unrolling all loops implies that standard loop unrolling must also
1843 if (flag_unroll_all_loops
)
1844 flag_unroll_loops
= 1;
1846 /* The loop unrolling code assumes that cse will be run after loop.
1847 web and rename-registers also help when run after loop unrolling. */
1848 if (flag_rerun_cse_after_loop
== AUTODETECT_VALUE
)
1849 flag_rerun_cse_after_loop
= flag_unroll_loops
|| flag_peel_loops
;
1851 if (flag_web
== AUTODETECT_VALUE
)
1852 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1854 if (flag_rename_registers
== AUTODETECT_VALUE
)
1855 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1857 if (flag_non_call_exceptions
)
1858 flag_asynchronous_unwind_tables
= 1;
1859 if (flag_asynchronous_unwind_tables
)
1860 flag_unwind_tables
= 1;
1862 if (flag_value_profile_transformations
)
1863 flag_profile_values
= 1;
1865 /* Warn about options that are not supported on this machine. */
1866 #ifndef INSN_SCHEDULING
1867 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1868 warning (0, "instruction scheduling not supported on this target machine");
1871 if (flag_delayed_branch
)
1872 warning (0, "this target machine does not have delayed branches");
1875 user_label_prefix
= USER_LABEL_PREFIX
;
1876 if (flag_leading_underscore
!= -1)
1878 /* If the default prefix is more complicated than "" or "_",
1879 issue a warning and ignore this option. */
1880 if (user_label_prefix
[0] == 0 ||
1881 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1883 user_label_prefix
= flag_leading_underscore
? "_" : "";
1886 warning (0, "-f%sleading-underscore not supported on this target machine",
1887 flag_leading_underscore
? "" : "no-");
1890 /* If we are in verbose mode, write out the version and maybe all the
1891 option flags in use. */
1894 print_version (stderr
, "");
1896 print_switch_values (print_to_stderr
);
1899 if (flag_syntax_only
)
1901 write_symbols
= NO_DEBUG
;
1907 if (debug_info_level
== DINFO_LEVEL_NONE
)
1909 debug_info_level
= DINFO_LEVEL_NORMAL
;
1911 if (write_symbols
== NO_DEBUG
)
1912 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1915 debug_info_level
= DINFO_LEVEL_NONE
;
1918 if (flag_dump_final_insns
&& !flag_syntax_only
&& !no_backend
)
1920 FILE *final_output
= fopen (flag_dump_final_insns
, "w");
1923 error ("could not open final insn dump file %qs: %m",
1924 flag_dump_final_insns
);
1925 flag_dump_final_insns
= NULL
;
1927 else if (fclose (final_output
))
1929 error ("could not close zeroed insn dump file %qs: %m",
1930 flag_dump_final_insns
);
1931 flag_dump_final_insns
= NULL
;
1935 /* Unless over-ridden for the target, assume that all DWARF levels
1936 may be emitted, if DWARF2_DEBUG is selected. */
1937 if (dwarf_strict
< 0)
1940 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1942 if (debug_info_level
== DINFO_LEVEL_NONE
)
1943 write_symbols
= NO_DEBUG
;
1945 if (write_symbols
== NO_DEBUG
)
1947 #if defined(DBX_DEBUGGING_INFO)
1948 else if (write_symbols
== DBX_DEBUG
)
1949 debug_hooks
= &dbx_debug_hooks
;
1951 #if defined(XCOFF_DEBUGGING_INFO)
1952 else if (write_symbols
== XCOFF_DEBUG
)
1953 debug_hooks
= &xcoff_debug_hooks
;
1955 #ifdef SDB_DEBUGGING_INFO
1956 else if (write_symbols
== SDB_DEBUG
)
1957 debug_hooks
= &sdb_debug_hooks
;
1959 #ifdef DWARF2_DEBUGGING_INFO
1960 else if (write_symbols
== DWARF2_DEBUG
)
1961 debug_hooks
= &dwarf2_debug_hooks
;
1963 #ifdef VMS_DEBUGGING_INFO
1964 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1965 debug_hooks
= &vmsdbg_debug_hooks
;
1968 error ("target system does not support the \"%s\" debug format",
1969 debug_type_names
[write_symbols
]);
1971 /* We know which debug output will be used so we can set flag_var_tracking
1972 and flag_var_tracking_uninit if the user has not specified them. */
1973 if (debug_info_level
< DINFO_LEVEL_NORMAL
1974 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1976 if (flag_var_tracking
== 1
1977 || flag_var_tracking_uninit
== 1)
1979 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1980 warning (0, "variable tracking requested, but useless unless "
1981 "producing debug info");
1983 warning (0, "variable tracking requested, but not supported "
1984 "by this debug format");
1986 flag_var_tracking
= 0;
1987 flag_var_tracking_uninit
= 0;
1990 /* If the user specifically requested variable tracking with tagging
1991 uninitialized variables, we need to turn on variable tracking.
1992 (We already determined above that variable tracking is feasible.) */
1993 if (flag_var_tracking_uninit
)
1994 flag_var_tracking
= 1;
1996 if (flag_var_tracking
== AUTODETECT_VALUE
)
1997 flag_var_tracking
= optimize
>= 1;
1999 if (flag_var_tracking_assignments
== AUTODETECT_VALUE
)
2000 flag_var_tracking_assignments
= flag_var_tracking
2001 && !(flag_selective_scheduling
|| flag_selective_scheduling2
);
2003 if (flag_var_tracking_assignments_toggle
)
2004 flag_var_tracking_assignments
= !flag_var_tracking_assignments
;
2006 if (flag_var_tracking_assignments
&& !flag_var_tracking
)
2007 flag_var_tracking
= flag_var_tracking_assignments
= -1;
2009 if (flag_var_tracking_assignments
2010 && (flag_selective_scheduling
|| flag_selective_scheduling2
))
2011 warning (0, "var-tracking-assignments changes selective scheduling");
2013 if (flag_tree_cselim
== AUTODETECT_VALUE
)
2014 #ifdef HAVE_conditional_move
2015 flag_tree_cselim
= 1;
2017 flag_tree_cselim
= 0;
2020 /* If auxiliary info generation is desired, open the output file.
2021 This goes in the same directory as the source file--unlike
2022 all the other output files. */
2023 if (flag_gen_aux_info
)
2025 aux_info_file
= fopen (aux_info_file_name
, "w");
2026 if (aux_info_file
== 0)
2027 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
2030 if (! targetm
.have_named_sections
)
2032 if (flag_function_sections
)
2034 warning (0, "-ffunction-sections not supported for this target");
2035 flag_function_sections
= 0;
2037 if (flag_data_sections
)
2039 warning (0, "-fdata-sections not supported for this target");
2040 flag_data_sections
= 0;
2044 if (flag_function_sections
&& profile_flag
)
2046 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2047 flag_function_sections
= 0;
2050 #ifndef HAVE_prefetch
2051 if (flag_prefetch_loop_arrays
)
2053 warning (0, "-fprefetch-loop-arrays not supported for this target");
2054 flag_prefetch_loop_arrays
= 0;
2057 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
2059 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2060 flag_prefetch_loop_arrays
= 0;
2064 /* This combination of options isn't handled for i386 targets and doesn't
2065 make much sense anyway, so don't allow it. */
2066 if (flag_prefetch_loop_arrays
&& optimize_size
)
2068 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2069 flag_prefetch_loop_arrays
= 0;
2072 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2073 if (flag_signaling_nans
)
2074 flag_trapping_math
= 1;
2076 /* We cannot reassociate if we want traps or signed zeros. */
2077 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
2079 warning (0, "-fassociative-math disabled; other options take precedence");
2080 flag_associative_math
= 0;
2083 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2084 if (flag_cx_limited_range
)
2085 flag_complex_method
= 0;
2087 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2088 if (flag_cx_fortran_rules
)
2089 flag_complex_method
= 1;
2091 /* Targets must be able to place spill slots at lower addresses. If the
2092 target already uses a soft frame pointer, the transition is trivial. */
2093 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
2095 warning (0, "-fstack-protector not supported for this target");
2096 flag_stack_protect
= 0;
2098 if (!flag_stack_protect
)
2099 warn_stack_protect
= 0;
2101 /* ??? Unwind info is not correct around the CFG unless either a frame
2102 pointer is present or A_O_A is set. Fixing this requires rewriting
2103 unwind info generation to be aware of the CFG and propagating states
2105 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
2106 && flag_omit_frame_pointer
)
2108 warning (0, "unwind tables currently require a frame pointer "
2110 flag_omit_frame_pointer
= 0;
2113 /* Save the current optimization options. */
2114 optimization_default_node
= build_optimization_node ();
2115 optimization_current_node
= optimization_default_node
;
2118 /* This function can be called multiple times to reinitialize the compiler
2119 back end when register classes or instruction sets have changed,
2120 before each function. */
2122 backend_init_target (void)
2124 /* Initialize alignment variables. */
2127 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2128 to initialize reg_raw_mode[]. */
2131 /* This invokes target hooks to set fixed_reg[] etc, which is
2135 /* This depends on stack_pointer_rtx. */
2136 init_fake_stack_mems ();
2138 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2140 init_alias_target ();
2142 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2145 /* The following initialization functions need to generate rtl, so
2146 provide a dummy function context for them. */
2147 init_dummy_function_start ();
2149 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2150 on a mode change. */
2153 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2154 after a mode change as well. */
2155 caller_save_initialized_p
= false;
2157 expand_dummy_function_end ();
2160 /* Initialize the compiler back end. This function is called only once,
2161 when starting the compiler. */
2168 init_inline_once ();
2169 init_varasm_once ();
2170 save_register_info ();
2172 /* Initialize the target-specific back end pieces. */
2174 backend_init_target ();
2177 /* Initialize excess precision settings. */
2179 init_excess_precision (void)
2181 /* Adjust excess precision handling based on the target options. If
2182 the front end cannot handle it, flag_excess_precision_cmdline
2183 will already have been set accordingly in the post_options
2185 gcc_assert (flag_excess_precision_cmdline
!= EXCESS_PRECISION_DEFAULT
);
2186 flag_excess_precision
= flag_excess_precision_cmdline
;
2187 if (flag_unsafe_math_optimizations
)
2188 flag_excess_precision
= EXCESS_PRECISION_FAST
;
2189 if (flag_excess_precision
== EXCESS_PRECISION_STANDARD
)
2191 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
2192 switch (flt_eval_method
)
2196 /* Either the target acts unpredictably (-1) or has all the
2197 operations required not to have excess precision (0). */
2198 flag_excess_precision
= EXCESS_PRECISION_FAST
;
2202 /* In these cases, predictable excess precision makes
2206 /* Any other implementation-defined FLT_EVAL_METHOD values
2207 require the compiler to handle the associated excess
2208 precision rules in excess_precision_type. */
2214 /* Initialize things that are both lang-dependent and target-dependent.
2215 This function can be called more than once if target parameters change. */
2217 lang_dependent_init_target (void)
2219 /* This determines excess precision settings. */
2220 init_excess_precision ();
2222 /* This creates various _DECL nodes, so needs to be called after the
2223 front end is initialized. It also depends on the HAVE_xxx macros
2224 generated from the target machine description. */
2227 /* The following initialization functions need to generate rtl, so
2228 provide a dummy function context for them. */
2229 init_dummy_function_start ();
2231 /* Do the target-specific parts of expr initialization. */
2232 init_expr_target ();
2234 /* Although the actions of these functions are language-independent,
2235 they use optabs, so we cannot call them from backend_init. */
2239 expand_dummy_function_end ();
2242 /* Language-dependent initialization. Returns nonzero on success. */
2244 lang_dependent_init (const char *name
)
2246 location_t save_loc
= input_location
;
2247 if (dump_base_name
== 0)
2248 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
2250 /* Other front-end initialization. */
2251 input_location
= BUILTINS_LOCATION
;
2252 if (lang_hooks
.init () == 0)
2254 input_location
= save_loc
;
2256 init_asm_output (name
);
2258 /* This creates various _DECL nodes, so needs to be called after the
2259 front end is initialized. */
2262 /* Do the target-specific parts of the initialization. */
2263 lang_dependent_init_target ();
2265 /* If dbx symbol table desired, initialize writing it and output the
2266 predefined types. */
2267 timevar_push (TV_SYMOUT
);
2269 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2270 if (dwarf2out_do_frame ())
2271 dwarf2out_frame_init ();
2274 /* Now we have the correct original filename, we can initialize
2276 (*debug_hooks
->init
) (name
);
2278 timevar_pop (TV_SYMOUT
);
2284 /* Reinitialize everything when target parameters, such as register usage,
2287 target_reinit (void)
2289 /* Reinitialize RTL backend. */
2290 backend_init_target ();
2292 /* Reinitialize lang-dependent parts. */
2293 lang_dependent_init_target ();
2297 dump_memory_report (bool final
)
2299 ggc_print_statistics ();
2300 stringpool_statistics ();
2301 dump_tree_statistics ();
2302 dump_gimple_statistics ();
2303 dump_rtx_statistics ();
2304 dump_alloc_pool_statistics ();
2305 dump_bitmap_statistics ();
2306 dump_vec_loc_statistics ();
2307 dump_ggc_loc_statistics (final
);
2308 dump_alias_stats (stderr
);
2309 dump_pta_stats (stderr
);
2312 /* Clean up: close opened files, etc. */
2317 /* Close the dump files. */
2318 if (flag_gen_aux_info
)
2320 fclose (aux_info_file
);
2322 unlink (aux_info_file_name
);
2325 /* Close non-debugging input and output files. Take special care to note
2326 whether fclose returns an error, since the pages might still be on the
2327 buffer chain while the file is open. */
2331 if (ferror (asm_out_file
) != 0)
2332 fatal_error ("error writing to %s: %m", asm_file_name
);
2333 if (fclose (asm_out_file
) != 0)
2334 fatal_error ("error closing %s: %m", asm_file_name
);
2336 unlink_if_ordinary (asm_file_name
);
2340 finish_optimization_passes ();
2345 dump_memory_report (true);
2347 /* Language-specific end of compilation actions. */
2348 lang_hooks
.finish ();
2351 /* Initialize the compiler, and compile the input file. */
2355 /* Initialize timing first. The C front ends read the main file in
2356 the post_options hook, and C++ does file timings. */
2357 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2359 timevar_start (TV_TOTAL
);
2363 /* Don't do any more if an error has already occurred. */
2366 /* This must be run always, because it is needed to compute the FP
2367 predefined macros, such as __LDBL_MAX__, for targets using non
2368 default FP formats. */
2369 init_adjust_machine_modes ();
2371 /* Set up the back-end if requested. */
2375 /* Language-dependent initialization. Returns true on success. */
2376 if (lang_dependent_init (main_input_filename
))
2382 /* Stop timing and print the times. */
2383 timevar_stop (TV_TOTAL
);
2384 timevar_print (stderr
);
2387 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2388 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2389 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2391 It is not safe to call this function more than once. */
2394 toplev_main (int argc
, char **argv
)
2396 expandargv (&argc
, &argv
);
2398 save_argv
= CONST_CAST2 (const char **, char **, argv
);
2400 /* Initialization of GCC's environment, and diagnostics. */
2401 general_init (argv
[0]);
2403 /* Parse the options and do minimal processing; basically just
2404 enough to default flags appropriately. */
2405 decode_options (argc
, CONST_CAST2 (const char **, char **, argv
));
2409 initialize_plugins ();
2412 print_version (stderr
, "");
2415 print_plugins_help (stderr
, "");
2417 /* Exit early if we can (e.g. -help). */
2418 if (!exit_after_options
)
2421 if (warningcount
|| errorcount
)
2422 print_ignored_options ();
2423 diagnostic_finish (global_dc
);
2425 /* Invoke registered plugin callbacks if any. */
2426 invoke_plugin_callbacks (PLUGIN_FINISH
, NULL
);
2428 finalize_plugins ();
2430 return (FATAL_EXIT_CODE
);
2432 return (SUCCESS_EXIT_CODE
);