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
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. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
88 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
89 #include "dwarf2out.h"
92 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
96 #ifdef SDB_DEBUGGING_INFO
100 #ifdef XCOFF_DEBUGGING_INFO
101 #include "xcoffout.h" /* Needed for external data
102 declarations for e.g. AIX 4.x. */
105 static void general_init (const char *);
106 static void do_compile (void);
107 static void process_options (void);
108 static void backend_init (void);
109 static int lang_dependent_init (const char *);
110 static void init_asm_output (const char *);
111 static void finalize (void);
113 static void crash_signal (int) ATTRIBUTE_NORETURN
;
114 static void setup_core_dumping (void);
115 static void compile_file (void);
117 /* Nonzero to dump debug info whilst parsing (-dy option). */
118 static int set_yydebug
;
120 /* True if we don't need a backend (e.g. preprocessing only). */
121 static bool no_backend
;
123 /* Length of line when printing switch values. */
126 /* Name of program invoked, sans directories. */
128 const char *progname
;
130 /* Copy of argument vector to toplev_main. */
131 static const char **save_argv
;
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 and default_debug_hooks in process_options (). */
141 #define AUTODETECT_VALUE 2
143 /* Current position in real source file. */
145 location_t input_location
;
147 struct line_maps
*line_table
;
149 /* Name to use as base of names for dump output files. */
151 const char *dump_base_name
;
153 /* Name to use as a base for auxiliary output files. */
155 const char *aux_base_name
;
157 /* Prefix for profile data files */
158 const char *profile_data_prefix
;
160 /* A mask of target_flags that includes bit X if X was set or cleared
161 on the command line. */
163 int target_flags_explicit
;
165 /* Debug hooks - dependent upon command line options. */
167 const struct gcc_debug_hooks
*debug_hooks
;
169 /* Debug hooks - target default. */
171 static const struct gcc_debug_hooks
*default_debug_hooks
;
173 /* Other flags saying which kinds of debugging dump have been requested. */
175 int rtl_dump_and_exit
;
176 int flag_print_asm_name
;
177 enum graph_dump_types graph_dump_format
;
179 /* Name for output file of assembly code, specified with -o. */
181 const char *asm_file_name
;
183 /* Nonzero means do optimizations. -O.
184 Particular numeric values stand for particular amounts of optimization;
185 thus, -O2 stores 2 here. However, the optimizations beyond the basic
186 ones are not controlled directly by this variable. Instead, they are
187 controlled by individual `flag_...' variables that are defaulted
188 based on this variable. */
192 /* Nonzero means optimize for size. -Os.
193 The only valid values are zero and nonzero. When optimize_size is
194 nonzero, optimize defaults to 2, but certain individual code
195 bloating optimizations are disabled. */
197 int optimize_size
= 0;
199 /* The FUNCTION_DECL for the function currently being compiled,
200 or 0 if between functions. */
201 tree current_function_decl
;
203 /* Set to the FUNC_BEGIN label of the current function, or NULL
205 const char * current_function_func_begin_label
;
207 /* Nonzero means to collect statistics which might be expensive
208 and to print them when we are done. */
209 int flag_detailed_statistics
= 0;
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 /* Nonzero means `char' should be signed. */
223 int flag_signed_char
;
225 /* Nonzero means give an enum type only as many bytes as it needs. A value
226 of 2 means it has not yet been initialized. */
228 int flag_short_enums
;
230 /* Nonzero if structures and unions should be returned in memory.
232 This should only be defined if compatibility with another compiler or
233 with an ABI is needed, because it results in slower code. */
235 #ifndef DEFAULT_PCC_STRUCT_RETURN
236 #define DEFAULT_PCC_STRUCT_RETURN 1
239 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
241 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
243 /* 0 means straightforward implementation of complex divide acceptable.
244 1 means wide ranges of inputs must work for complex divide.
245 2 means C99-like requirements for complex multiply and divide. */
247 int flag_complex_method
= 1;
249 /* Nonzero means we should be saving declaration info into a .X file. */
251 int flag_gen_aux_info
= 0;
253 /* Specified name of aux-info file. */
255 const char *aux_info_file_name
;
257 /* Nonzero if we are compiling code for a shared library, zero for
262 /* Generate code for GNU or NeXT Objective-C runtime environment. */
264 #ifdef NEXT_OBJC_RUNTIME
265 int flag_next_runtime
= 1;
267 int flag_next_runtime
= 0;
270 /* Set to the default thread-local storage (tls) model to use. */
272 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
274 /* Set the default region and algorithm for the integrated register
277 enum ira_algorithm flag_ira_algorithm
= IRA_ALGORITHM_CB
;
278 enum ira_region flag_ira_region
= IRA_REGION_MIXED
;
280 /* Set the default value for -fira-verbose. */
282 unsigned int flag_ira_verbose
= 5;
284 /* Nonzero means change certain warnings into errors.
285 Usually these are warnings about failure to conform to some standard. */
287 int flag_pedantic_errors
= 0;
289 /* Nonzero means make permerror produce warnings instead of errors. */
291 int flag_permissive
= 0;
293 /* -dA causes debug commentary information to be produced in
294 the generated assembly code (to make it more readable). This option
295 is generally only of use to those who actually need to read the
296 generated assembly code (perhaps while debugging the compiler itself).
297 Currently, this switch is only used by dwarfout.c; however, it is intended
298 to be a catchall for printing debug information in the assembler file. */
300 int flag_debug_asm
= 0;
302 /* -dP causes the rtl to be emitted as a comment in assembly. */
304 int flag_dump_rtl_in_asm
= 0;
306 /* When non-NULL, indicates that whenever space is allocated on the
307 stack, the resulting stack pointer must not pass this
308 address---that is, for stacks that grow downward, the stack pointer
309 must always be greater than or equal to this address; for stacks
310 that grow upward, the stack pointer must be less than this address.
311 At present, the rtx may be either a REG or a SYMBOL_REF, although
312 the support provided depends on the backend. */
315 /* Nonzero if we should track variables. When
316 flag_var_tracking == AUTODETECT_VALUE it will be set according
317 to optimize, debug_info_level and debug_hooks in process_options (). */
318 int flag_var_tracking
= AUTODETECT_VALUE
;
320 /* Type of stack check. */
321 enum stack_check_type flag_stack_check
= NO_STACK_CHECK
;
323 /* True if the user has tagged the function with the 'section'
326 bool user_defined_section_attribute
= false;
328 /* Values of the -falign-* flags: how much to align labels in code.
329 0 means `use default', 1 means `don't align'.
330 For each variable, there is an _log variant which is the power
331 of two not less than the variable, for .align output. */
334 int align_loops_max_skip
;
336 int align_jumps_max_skip
;
337 int align_labels_log
;
338 int align_labels_max_skip
;
339 int align_functions_log
;
343 const char *const string
;
347 lang_independent_options
;
349 /* Nonzero if subexpressions must be evaluated from left-to-right. */
350 int flag_evaluation_order
= 0;
352 /* The user symbol prefix after having resolved same. */
353 const char *user_label_prefix
;
355 static const param_info lang_independent_params
[] = {
356 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
357 { OPTION, DEFAULT, false, MIN, MAX, HELP },
358 #include "params.def"
360 { NULL
, 0, false, 0, 0, NULL
}
363 /* Output files for assembler code (real compiler output)
364 and debugging dumps. */
368 FILE *dump_file
= NULL
;
369 const char *dump_file_name
;
371 /* The current working directory of a translation. It's generally the
372 directory from which compilation was initiated, but a preprocessed
373 file may specify the original directory in which it was
376 static const char *src_pwd
;
378 /* Initialize src_pwd with the given string, and return true. If it
379 was already initialized, return false. As a special case, it may
380 be called with a NULL argument to test whether src_pwd has NOT been
384 set_src_pwd (const char *pwd
)
388 if (strcmp (src_pwd
, pwd
) == 0)
394 src_pwd
= xstrdup (pwd
);
398 /* Return the directory from which the translation unit was initiated,
399 in case set_src_pwd() was not called before to assign it a
415 /* Called when the start of a function definition is parsed,
416 this function prints on stderr the name of the function. */
418 announce_function (tree decl
)
422 if (rtl_dump_and_exit
)
423 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
425 fprintf (stderr
, " %s", lang_hooks
.decl_printable_name (decl
, 2));
427 pp_needs_newline (global_dc
->printer
) = true;
428 diagnostic_set_last_function (global_dc
, (diagnostic_info
*) NULL
);
432 /* Initialize local_tick with the time of day, or -1 if
433 flag_random_seed is set. */
436 init_local_tick (void)
438 if (!flag_random_seed
)
440 /* Get some more or less random data. */
441 #ifdef HAVE_GETTIMEOFDAY
445 gettimeofday (&tv
, NULL
);
446 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
450 time_t now
= time (NULL
);
452 if (now
!= (time_t)-1)
453 local_tick
= (unsigned) now
;
461 /* Set up a default flag_random_seed and local_tick, unless the user
462 already specified one. Must be called after init_local_tick. */
465 init_random_seed (void)
467 unsigned HOST_WIDE_INT value
;
468 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
470 value
= local_tick
^ getpid ();
472 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
473 flag_random_seed
= random_seed
;
476 /* Obtain the random_seed string. Unless NOINIT, initialize it if
477 it's not provided in the command line. */
480 get_random_seed (bool noinit
)
482 if (!flag_random_seed
&& !noinit
)
484 return flag_random_seed
;
487 /* Modify the random_seed string to VAL. Return its previous
491 set_random_seed (const char *val
)
493 const char *old
= flag_random_seed
;
494 flag_random_seed
= val
;
498 /* Decode the string P as an integral parameter.
499 If the string is indeed an integer return its numeric value else
500 issue an Invalid Option error for the option PNAME and return DEFVAL.
501 If PNAME is zero just return DEFVAL, do not call error. */
504 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
506 const char *endp
= p
;
519 error ("invalid option argument %qs", pname
);
526 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
527 for floor_log2 and exact_log2; see toplev.h. That construct, however,
528 conflicts with the ISO C++ One Definition Rule. */
530 #if GCC_VERSION < 3004 || !defined (__cplusplus)
532 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
533 If X is 0, return -1. */
536 floor_log2 (unsigned HOST_WIDE_INT x
)
544 t
= HOST_BITS_PER_WIDE_INT
- 1 - (int) CLZ_HWI (x
);
546 if (HOST_BITS_PER_WIDE_INT
> 64)
547 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
549 if (HOST_BITS_PER_WIDE_INT
> 32)
550 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
552 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
554 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
556 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
558 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
560 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
567 /* Return the logarithm of X, base 2, considering X unsigned,
568 if X is a power of 2. Otherwise, returns -1. */
571 exact_log2 (unsigned HOST_WIDE_INT x
)
576 return x
? CTZ_HWI (x
) : -1;
578 return floor_log2 (x
);
582 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
584 /* Handler for fatal signals, such as SIGSEGV. These are transformed
585 into ICE messages, which is much more user friendly. In case the
586 error printer crashes, reset the signal to prevent infinite recursion. */
589 crash_signal (int signo
)
591 signal (signo
, SIG_DFL
);
593 /* If we crashed while processing an ASM statement, then be a little more
594 graceful. It's most likely the user's fault. */
595 if (this_is_asm_operands
)
597 output_operand_lossage ("unrecoverable error");
598 exit (FATAL_EXIT_CODE
);
601 internal_error ("%s", strsignal (signo
));
604 /* Arrange to dump core on error. (The regular error message is still
605 printed first, except in the case of abort().) */
608 setup_core_dumping (void)
611 signal (SIGABRT
, SIG_DFL
);
613 #if defined(HAVE_SETRLIMIT)
616 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
617 fatal_error ("getting core file size maximum limit: %m");
618 rlim
.rlim_cur
= rlim
.rlim_max
;
619 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
620 fatal_error ("setting core file size limit to maximum: %m");
623 diagnostic_abort_on_error (global_dc
);
627 /* Strip off a legitimate source ending from the input string NAME of
628 length LEN. Rather than having to know the names used by all of
629 our front ends, we strip off an ending of a period followed by
630 up to five characters. (Java uses ".class".) */
633 strip_off_ending (char *name
, int len
)
636 for (i
= 2; i
< 6 && len
> i
; i
++)
638 if (name
[len
- i
] == '.')
640 name
[len
- i
] = '\0';
646 /* Output a quoted string. */
649 output_quoted_string (FILE *asm_file
, const char *string
)
651 #ifdef OUTPUT_QUOTED_STRING
652 OUTPUT_QUOTED_STRING (asm_file
, string
);
656 putc ('\"', asm_file
);
657 while ((c
= *string
++) != 0)
661 if (c
== '\"' || c
== '\\')
662 putc ('\\', asm_file
);
666 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
668 putc ('\"', asm_file
);
672 /* Output a file name in the form wanted by System V. */
675 output_file_directive (FILE *asm_file
, const char *input_name
)
680 if (input_name
== NULL
)
681 input_name
= "<stdin>";
683 input_name
= remap_debug_filename (input_name
);
685 len
= strlen (input_name
);
686 na
= input_name
+ len
;
688 /* NA gets INPUT_NAME sans directory names. */
689 while (na
> input_name
)
691 if (IS_DIR_SEPARATOR (na
[-1]))
696 #ifdef ASM_OUTPUT_SOURCE_FILENAME
697 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
699 fprintf (asm_file
, "\t.file\t");
700 output_quoted_string (asm_file
, na
);
701 fputc ('\n', asm_file
);
705 /* A subroutine of wrapup_global_declarations. We've come to the end of
706 the compilation unit. All deferred variables should be undeferred,
707 and all incomplete decls should be finalized. */
710 wrapup_global_declaration_1 (tree decl
)
712 /* We're not deferring this any longer. Assignment is conditional to
713 avoid needlessly dirtying PCH pages. */
714 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
715 && DECL_DEFER_OUTPUT (decl
) != 0)
716 DECL_DEFER_OUTPUT (decl
) = 0;
718 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
719 lang_hooks
.finish_incomplete_decl (decl
);
722 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
723 needs to be output. Return true if it is output. */
726 wrapup_global_declaration_2 (tree decl
)
728 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
731 /* Don't write out static consts, unless we still need them.
733 We also keep static consts if not optimizing (for debugging),
734 unless the user specified -fno-keep-static-consts.
735 ??? They might be better written into the debug information.
736 This is possible when using DWARF.
738 A language processor that wants static constants to be always
739 written out (even if it is not used) is responsible for
740 calling rest_of_decl_compilation itself. E.g. the C front-end
741 calls rest_of_decl_compilation from finish_decl.
742 One motivation for this is that is conventional in some
743 environments to write things like:
744 static const char rcsid[] = "... version string ...";
745 intending to force the string to be in the executable.
747 A language processor that would prefer to have unneeded
748 static constants "optimized away" would just defer writing
749 them out until here. E.g. C++ does this, because static
750 constants are often defined in header files.
752 ??? A tempting alternative (for both C and C++) would be
753 to force a constant to be written if and only if it is
754 defined in a main file, as opposed to an include file. */
756 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
758 struct varpool_node
*node
;
760 node
= varpool_node (decl
);
764 else if (node
->alias
)
766 else if (!cgraph_global_info_ready
768 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
770 else if (node
->needed
)
772 else if (DECL_COMDAT (decl
))
774 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
775 && (optimize
|| !flag_keep_static_consts
776 || DECL_ARTIFICIAL (decl
)))
781 rest_of_decl_compilation (decl
, 1, 1);
789 /* Do any final processing required for the declarations in VEC, of
790 which there are LEN. We write out inline functions and variables
791 that have been deferred until this point, but which are required.
792 Returns nonzero if anything was put out. */
795 wrapup_global_declarations (tree
*vec
, int len
)
797 bool reconsider
, output_something
= false;
800 for (i
= 0; i
< len
; i
++)
801 wrapup_global_declaration_1 (vec
[i
]);
803 /* Now emit any global variables or functions that we have been
804 putting off. We need to loop in case one of the things emitted
805 here references another one which comes earlier in the list. */
809 for (i
= 0; i
< len
; i
++)
810 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
812 output_something
= true;
816 return output_something
;
819 /* A subroutine of check_global_declarations. Issue appropriate warnings
820 for the global declaration DECL. */
823 check_global_declaration_1 (tree decl
)
825 /* Warn about any function declared static but not defined. We don't
826 warn about variables, because many programs have static variables
827 that exist only to get some text into the object file. */
828 if (TREE_CODE (decl
) == FUNCTION_DECL
829 && DECL_INITIAL (decl
) == 0
830 && DECL_EXTERNAL (decl
)
831 && ! DECL_ARTIFICIAL (decl
)
832 && ! TREE_NO_WARNING (decl
)
833 && ! TREE_PUBLIC (decl
)
834 && (warn_unused_function
835 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
837 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
838 pedwarn (input_location
, 0, "%q+F used but never defined", decl
);
840 warning (OPT_Wunused_function
, "%q+F declared %<static%> but never defined", decl
);
841 /* This symbol is effectively an "extern" declaration now. */
842 TREE_PUBLIC (decl
) = 1;
843 assemble_external (decl
);
846 /* Warn about static fns or vars defined but not used. */
847 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
848 /* We don't warn about "static const" variables because the
849 "rcs_id" idiom uses that construction. */
850 || (warn_unused_variable
851 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
852 && ! DECL_IN_SYSTEM_HEADER (decl
)
853 && ! TREE_USED (decl
)
854 /* The TREE_USED bit for file-scope decls is kept in the identifier,
855 to handle multiple external decls in different scopes. */
856 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
857 && ! DECL_EXTERNAL (decl
)
858 && ! TREE_PUBLIC (decl
)
859 /* A volatile variable might be used in some non-obvious way. */
860 && ! TREE_THIS_VOLATILE (decl
)
861 /* Global register variables must be declared to reserve them. */
862 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
863 /* Otherwise, ask the language. */
864 && lang_hooks
.decls
.warn_unused_global (decl
))
865 warning ((TREE_CODE (decl
) == FUNCTION_DECL
)
866 ? OPT_Wunused_function
867 : OPT_Wunused_variable
,
868 "%q+D defined but not used", decl
);
871 /* Issue appropriate warnings for the global declarations in VEC (of
872 which there are LEN). */
875 check_global_declarations (tree
*vec
, int len
)
879 for (i
= 0; i
< len
; i
++)
880 check_global_declaration_1 (vec
[i
]);
883 /* Emit debugging information for all global declarations in VEC. */
886 emit_debug_global_declarations (tree
*vec
, int len
)
890 /* Avoid confusing the debug information machinery when there are errors. */
891 if (errorcount
!= 0 || sorrycount
!= 0)
894 timevar_push (TV_SYMOUT
);
895 for (i
= 0; i
< len
; i
++)
896 debug_hooks
->global_decl (vec
[i
]);
897 timevar_pop (TV_SYMOUT
);
900 /* Warn about a use of an identifier which was marked deprecated. */
902 warn_deprecated_use (tree node
)
904 if (node
== 0 || !warn_deprecated_decl
)
909 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
910 warning (OPT_Wdeprecated_declarations
,
911 "%qD is deprecated (declared at %s:%d)",
912 node
, xloc
.file
, xloc
.line
);
914 else if (TYPE_P (node
))
916 const char *what
= NULL
;
917 tree decl
= TYPE_STUB_DECL (node
);
919 if (TYPE_NAME (node
))
921 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
922 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
923 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
924 && DECL_NAME (TYPE_NAME (node
)))
925 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
930 expanded_location xloc
931 = expand_location (DECL_SOURCE_LOCATION (decl
));
933 warning (OPT_Wdeprecated_declarations
,
934 "%qs is deprecated (declared at %s:%d)", what
,
935 xloc
.file
, xloc
.line
);
937 warning (OPT_Wdeprecated_declarations
,
938 "type is deprecated (declared at %s:%d)",
939 xloc
.file
, xloc
.line
);
944 warning (OPT_Wdeprecated_declarations
, "%qs is deprecated", what
);
946 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
951 /* Compile an entire translation unit. Write a file of assembly
952 output and various debugging dumps. */
957 /* Initialize yet another pass. */
959 ggc_protect_identifiers
= true;
962 init_final (main_input_filename
);
963 coverage_init (aux_base_name
);
966 timevar_push (TV_PARSE
);
968 /* Call the parser, which parses the entire file (calling
969 rest_of_compilation for each function). */
970 lang_hooks
.parse_file (set_yydebug
);
972 /* Compilation is now finished except for writing
973 what's left of the symbol table output. */
974 timevar_pop (TV_PARSE
);
976 if (flag_syntax_only
)
979 ggc_protect_identifiers
= false;
981 lang_hooks
.decls
.final_write_globals ();
983 if (errorcount
|| sorrycount
)
986 varpool_assemble_pending_decls ();
989 /* This must occur after the loop to output deferred functions.
990 Else the coverage initializer would not be emitted if all the
991 functions in this compilation unit were deferred. */
994 /* Likewise for mudflap static object registrations. */
996 mudflap_finish_file ();
998 /* Likewise for emulated thread-local storage. */
999 if (!targetm
.have_tls
)
1002 output_shared_constant_pool ();
1003 output_object_blocks ();
1005 /* Write out any pending weak symbol declarations. */
1008 /* Do dbx symbols. */
1009 timevar_push (TV_SYMOUT
);
1011 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1012 if (dwarf2out_do_frame ())
1013 dwarf2out_frame_finish ();
1016 (*debug_hooks
->finish
) (main_input_filename
);
1017 timevar_pop (TV_SYMOUT
);
1019 /* Output some stuff at end of file if nec. */
1021 dw2_output_indirect_constants ();
1023 /* Flush any pending external directives. */
1024 process_pending_assemble_externals ();
1026 /* Attach a special .ident directive to the end of the file to identify
1027 the version of GCC which compiled this code. The format of the .ident
1028 string is patterned after the ones produced by native SVR4 compilers. */
1032 const char *pkg_version
= "(GNU) ";
1034 if (strcmp ("(GCC) ", pkgversion_string
))
1035 pkg_version
= pkgversion_string
;
1036 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
1037 IDENT_ASM_OP
, pkg_version
, version_string
);
1041 /* This must be at the end. Some target ports emit end of file directives
1042 into the assembly file here, and hence we can not output anything to the
1043 assembly file after this point. */
1044 targetm
.asm_out
.file_end ();
1047 /* Parse a -d... command line switch. */
1050 decode_d_option (const char *arg
)
1061 flag_print_asm_name
= 1;
1064 flag_dump_rtl_in_asm
= 1;
1065 flag_print_asm_name
= 1;
1068 graph_dump_format
= vcg
;
1071 rtl_dump_and_exit
= 1;
1076 case 'D': /* These are handled by the preprocessor. */
1083 setup_core_dumping();
1086 enable_rtl_dump_file ();
1090 warning (0, "unrecognized gcc debugging option: %c", c
);
1095 /* Indexed by enum debug_info_type. */
1096 const char *const debug_type_names
[] =
1098 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1101 /* Print version information to FILE.
1102 Each line begins with INDENT (for the case where FILE is the
1103 assembler output file). */
1106 print_version (FILE *file
, const char *indent
)
1108 static const char fmt1
[] =
1110 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1112 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1115 static const char fmt2
[] =
1116 N_("GMP version %s, MPFR version %s.\n");
1117 static const char fmt3
[] =
1118 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1119 static const char fmt4
[] =
1120 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1122 #define __VERSION__ "[?]"
1125 file
== stderr
? _(fmt1
) : fmt1
,
1126 indent
, *indent
!= 0 ? " " : "",
1127 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
1128 indent
, __VERSION__
);
1130 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1131 two string formats, "i.j.k" and "i.j" when k is zero. As of
1132 gmp-4.3.0, GMP always uses the 3 number format. */
1133 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1134 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1135 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1136 #define GCC_GMP_VERSION \
1137 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1138 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1139 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1140 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1142 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1143 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1144 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1147 file
== stderr
? _(fmt2
) : fmt2
,
1148 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
);
1149 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
1151 file
== stderr
? _(fmt3
) : fmt3
,
1152 indent
, *indent
!= 0 ? " " : "",
1153 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
1154 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
1156 file
== stderr
? _(fmt3
) : fmt3
,
1157 indent
, *indent
!= 0 ? " " : "",
1158 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
1160 file
== stderr
? _(fmt4
) : fmt4
,
1161 indent
, *indent
!= 0 ? " " : "",
1162 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1165 #ifdef ASM_COMMENT_START
1167 print_to_asm_out_file (print_switch_type type
, const char * text
)
1169 bool prepend_sep
= true;
1173 case SWITCH_TYPE_LINE_END
:
1174 putc ('\n', asm_out_file
);
1177 case SWITCH_TYPE_LINE_START
:
1178 fputs (ASM_COMMENT_START
, asm_out_file
);
1179 return strlen (ASM_COMMENT_START
);
1181 case SWITCH_TYPE_DESCRIPTIVE
:
1182 if (ASM_COMMENT_START
[0] == 0)
1183 prepend_sep
= false;
1185 case SWITCH_TYPE_PASSED
:
1186 case SWITCH_TYPE_ENABLED
:
1188 fputc (' ', asm_out_file
);
1189 fprintf (asm_out_file
, text
);
1190 /* No need to return the length here as
1191 print_single_switch has already done it. */
1201 print_to_stderr (print_switch_type type
, const char * text
)
1205 case SWITCH_TYPE_LINE_END
:
1206 putc ('\n', stderr
);
1209 case SWITCH_TYPE_LINE_START
:
1212 case SWITCH_TYPE_PASSED
:
1213 case SWITCH_TYPE_ENABLED
:
1214 fputc (' ', stderr
);
1217 case SWITCH_TYPE_DESCRIPTIVE
:
1218 fprintf (stderr
, text
);
1219 /* No need to return the length here as
1220 print_single_switch has already done it. */
1228 /* Print an option value and return the adjusted position in the line.
1229 ??? print_fn doesn't handle errors, eg disk full; presumably other
1230 code will catch a disk full though. */
1233 print_single_switch (print_switch_fn_type print_fn
,
1235 print_switch_type type
,
1238 /* The ultrix fprintf returns 0 on success, so compute the result
1239 we want here since we need it for the following test. The +1
1240 is for the separator character that will probably be emitted. */
1241 int len
= strlen (text
) + 1;
1244 && pos
+ len
> MAX_LINE
)
1246 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1251 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
1253 print_fn (type
, text
);
1257 /* Print active target switches using PRINT_FN.
1258 POS is the current cursor position and MAX is the size of a "line".
1259 Each line begins with INDENT and ends with TERM.
1260 Each switch is separated from the next by SEP. */
1263 print_switch_values (print_switch_fn_type print_fn
)
1269 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1270 that it can be printed below. This helps reproducibility. */
1271 if (!flag_random_seed
)
1272 init_random_seed ();
1274 /* Print the options as passed. */
1275 pos
= print_single_switch (print_fn
, pos
,
1276 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
1278 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1283 if (strcmp (*p
, "-o") == 0
1284 || strcmp (*p
, "-dumpbase") == 0
1285 || strcmp (*p
, "-auxbase") == 0)
1292 if (strcmp (*p
, "-quiet") == 0
1293 || strcmp (*p
, "-version") == 0)
1300 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
, *p
);
1304 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1306 /* Print the -f and -m options that have been enabled.
1307 We don't handle language specific options but printing argv
1309 pos
= print_single_switch (print_fn
, 0,
1310 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
1312 for (j
= 0; j
< cl_options_count
; j
++)
1313 if ((cl_options
[j
].flags
& CL_REPORT
)
1314 && option_enabled (j
) > 0)
1315 pos
= print_single_switch (print_fn
, pos
,
1316 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
1318 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1321 /* Open assembly code output file. Do this even if -fsyntax-only is
1322 on, because then the driver will have provided the name of a
1323 temporary file or bit bucket for us. NAME is the file specified on
1324 the command line, possibly NULL. */
1326 init_asm_output (const char *name
)
1328 if (name
== NULL
&& asm_file_name
== 0)
1329 asm_out_file
= stdout
;
1332 if (asm_file_name
== 0)
1334 int len
= strlen (dump_base_name
);
1335 char *dumpname
= XNEWVEC (char, len
+ 6);
1337 memcpy (dumpname
, dump_base_name
, len
+ 1);
1338 strip_off_ending (dumpname
, len
);
1339 strcat (dumpname
, ".s");
1340 asm_file_name
= dumpname
;
1342 if (!strcmp (asm_file_name
, "-"))
1343 asm_out_file
= stdout
;
1345 asm_out_file
= fopen (asm_file_name
, "w+b");
1346 if (asm_out_file
== 0)
1347 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1350 if (!flag_syntax_only
)
1352 targetm
.asm_out
.file_start ();
1354 if (flag_record_gcc_switches
)
1356 if (targetm
.asm_out
.record_gcc_switches
)
1358 /* Let the target know that we are about to start recording. */
1359 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1361 /* Now record the switches. */
1362 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1363 /* Let the target know that the recording is over. */
1364 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1368 inform (input_location
, "-frecord-gcc-switches is not supported by the current target");
1371 #ifdef ASM_COMMENT_START
1372 if (flag_verbose_asm
)
1374 /* Print the list of switches in effect
1375 into the assembler file as comments. */
1376 print_version (asm_out_file
, ASM_COMMENT_START
);
1377 print_switch_values (print_to_asm_out_file
);
1378 fprintf (asm_out_file
, "\n");
1384 /* Return true if the state of option OPTION should be stored in PCH files
1385 and checked by default_pch_valid_p. Store the option's current state
1389 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1391 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1393 if (cl_options
[option
].flag_var
== &target_flags
)
1394 if (targetm
.check_pch_target_flags
)
1396 return get_option_state (option
, state
);
1399 /* Default version of get_pch_validity.
1400 By default, every flag difference is fatal; that will be mostly right for
1401 most targets, but completely right for very few. */
1404 default_get_pch_validity (size_t *len
)
1406 struct cl_option_state state
;
1411 if (targetm
.check_pch_target_flags
)
1412 *len
+= sizeof (target_flags
);
1413 for (i
= 0; i
< cl_options_count
; i
++)
1414 if (option_affects_pch_p (i
, &state
))
1417 result
= r
= XNEWVEC (char, *len
);
1421 if (targetm
.check_pch_target_flags
)
1423 memcpy (r
, &target_flags
, sizeof (target_flags
));
1424 r
+= sizeof (target_flags
);
1427 for (i
= 0; i
< cl_options_count
; i
++)
1428 if (option_affects_pch_p (i
, &state
))
1430 memcpy (r
, state
.data
, state
.size
);
1437 /* Return a message which says that a PCH file was created with a different
1438 setting of OPTION. */
1441 pch_option_mismatch (const char *option
)
1445 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1447 return _("out of memory");
1451 /* Default version of pch_valid_p. */
1454 default_pch_valid_p (const void *data_p
, size_t len
)
1456 struct cl_option_state state
;
1457 const char *data
= (const char *)data_p
;
1460 /* -fpic and -fpie also usually make a PCH invalid. */
1461 if (data
[0] != flag_pic
)
1462 return _("created and used with different settings of -fpic");
1463 if (data
[1] != flag_pie
)
1464 return _("created and used with different settings of -fpie");
1467 /* Check target_flags. */
1468 if (targetm
.check_pch_target_flags
)
1473 memcpy (&tf
, data
, sizeof (target_flags
));
1474 data
+= sizeof (target_flags
);
1475 len
-= sizeof (target_flags
);
1476 r
= targetm
.check_pch_target_flags (tf
);
1481 for (i
= 0; i
< cl_options_count
; i
++)
1482 if (option_affects_pch_p (i
, &state
))
1484 if (memcmp (data
, state
.data
, state
.size
) != 0)
1485 return pch_option_mismatch (cl_options
[i
].opt_text
);
1493 /* Default tree printer. Handles declarations only. */
1495 default_tree_printer (pretty_printer
* pp
, text_info
*text
, const char *spec
,
1496 int precision
, bool wide
, bool set_locus
, bool hash
)
1500 /* FUTURE: %+x should set the locus. */
1501 if (precision
!= 0 || wide
|| hash
)
1507 t
= va_arg (*text
->args_ptr
, tree
);
1508 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1509 t
= DECL_DEBUG_EXPR (t
);
1514 t
= va_arg (*text
->args_ptr
, tree
);
1521 if (set_locus
&& text
->locus
)
1522 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1526 const char *n
= DECL_NAME (t
)
1527 ? lang_hooks
.decl_printable_name (t
, 2)
1532 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1537 /* A helper function; used as the reallocator function for cpp's line
1540 realloc_for_line_map (void *ptr
, size_t len
)
1542 return ggc_realloc (ptr
, len
);
1545 /* Initialization of the front end environment, before command line
1546 options are parsed. Signal handlers, internationalization etc.
1547 ARGV0 is main's argv[0]. */
1549 general_init (const char *argv0
)
1553 p
= argv0
+ strlen (argv0
);
1554 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1558 xmalloc_set_program_name (progname
);
1562 /* Unlock the stdio streams. */
1563 unlock_std_streams ();
1565 gcc_init_libintl ();
1567 /* Initialize the diagnostics reporting machinery, so option parsing
1568 can give warnings and errors. */
1569 diagnostic_initialize (global_dc
);
1570 /* Set a default printer. Language specific initializations will
1571 override it later. */
1572 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1574 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1576 signal (SIGSEGV
, crash_signal
);
1579 signal (SIGILL
, crash_signal
);
1582 signal (SIGBUS
, crash_signal
);
1585 signal (SIGABRT
, crash_signal
);
1587 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1588 signal (SIGIOT
, crash_signal
);
1591 signal (SIGFPE
, crash_signal
);
1594 /* Other host-specific signal setup. */
1595 (*host_hooks
.extra_signals
)();
1597 /* Initialize the garbage-collector, string pools and tree type hash
1601 line_table
= GGC_NEW (struct line_maps
);
1602 linemap_init (line_table
);
1603 line_table
->reallocator
= realloc_for_line_map
;
1606 /* Initialize register usage now so switches may override. */
1609 /* Register the language-independent parameters. */
1610 add_params (lang_independent_params
, LAST_PARAM
);
1612 /* This must be done after add_params but before argument processing. */
1613 init_ggc_heuristics();
1614 init_optimization_passes ();
1615 statistics_early_init ();
1618 /* Return true if the current target supports -fsection-anchors. */
1621 target_supports_section_anchors_p (void)
1623 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1626 if (targetm
.asm_out
.output_anchor
== NULL
)
1632 /* Default the align_* variables to 1 if they're still unset, and
1633 set up the align_*_log variables. */
1635 init_alignments (void)
1637 if (align_loops
<= 0)
1639 if (align_loops_max_skip
> align_loops
)
1640 align_loops_max_skip
= align_loops
- 1;
1641 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1642 if (align_jumps
<= 0)
1644 if (align_jumps_max_skip
> align_jumps
)
1645 align_jumps_max_skip
= align_jumps
- 1;
1646 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1647 if (align_labels
<= 0)
1649 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1650 if (align_labels_max_skip
> align_labels
)
1651 align_labels_max_skip
= align_labels
- 1;
1652 if (align_functions
<= 0)
1653 align_functions
= 1;
1654 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1657 /* Process the options that have been parsed. */
1659 process_options (void)
1661 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1662 This can happen with incorrect pre-processed input. */
1663 debug_hooks
= &do_nothing_debug_hooks
;
1665 /* This replaces set_Wunused. */
1666 if (warn_unused_function
== -1)
1667 warn_unused_function
= warn_unused
;
1668 if (warn_unused_label
== -1)
1669 warn_unused_label
= warn_unused
;
1670 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1671 if (warn_unused_parameter
== -1)
1672 warn_unused_parameter
= (warn_unused
&& extra_warnings
);
1673 if (warn_unused_variable
== -1)
1674 warn_unused_variable
= warn_unused
;
1675 if (warn_unused_value
== -1)
1676 warn_unused_value
= warn_unused
;
1678 /* Allow the front end to perform consistency checks and do further
1679 initialization based on the command line options. This hook also
1680 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1681 so we can correctly initialize debug output. */
1682 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1684 #ifdef OVERRIDE_OPTIONS
1685 /* Some machines may reject certain combinations of options. */
1689 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1691 warning (OPT_fsection_anchors
,
1692 "this target does not support %qs", "-fsection-anchors");
1693 flag_section_anchors
= 0;
1696 if (flag_short_enums
== 2)
1697 flag_short_enums
= targetm
.default_short_enums ();
1699 /* Set aux_base_name if not already set. */
1702 else if (main_input_filename
)
1704 char *name
= xstrdup (lbasename (main_input_filename
));
1706 strip_off_ending (name
, strlen (name
));
1707 aux_base_name
= name
;
1710 aux_base_name
= "gccaux";
1715 || flag_loop_interchange
1716 || flag_loop_strip_mine
1717 || flag_graphite_identity
)
1718 sorry ("Graphite loop optimizations cannot be used");
1721 /* Unrolling all loops implies that standard loop unrolling must also
1723 if (flag_unroll_all_loops
)
1724 flag_unroll_loops
= 1;
1726 /* The loop unrolling code assumes that cse will be run after loop.
1727 web and rename-registers also help when run after loop unrolling. */
1729 if (flag_rerun_cse_after_loop
== AUTODETECT_VALUE
)
1730 flag_rerun_cse_after_loop
= flag_unroll_loops
|| flag_peel_loops
;
1731 if (flag_web
== AUTODETECT_VALUE
)
1732 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1733 if (flag_rename_registers
== AUTODETECT_VALUE
)
1734 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1736 if (flag_non_call_exceptions
)
1737 flag_asynchronous_unwind_tables
= 1;
1738 if (flag_asynchronous_unwind_tables
)
1739 flag_unwind_tables
= 1;
1741 if (flag_value_profile_transformations
)
1742 flag_profile_values
= 1;
1744 /* Warn about options that are not supported on this machine. */
1745 #ifndef INSN_SCHEDULING
1746 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1747 warning (0, "instruction scheduling not supported on this target machine");
1750 if (flag_delayed_branch
)
1751 warning (0, "this target machine does not have delayed branches");
1754 user_label_prefix
= USER_LABEL_PREFIX
;
1755 if (flag_leading_underscore
!= -1)
1757 /* If the default prefix is more complicated than "" or "_",
1758 issue a warning and ignore this option. */
1759 if (user_label_prefix
[0] == 0 ||
1760 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1762 user_label_prefix
= flag_leading_underscore
? "_" : "";
1765 warning (0, "-f%sleading-underscore not supported on this target machine",
1766 flag_leading_underscore
? "" : "no-");
1769 /* If we are in verbose mode, write out the version and maybe all the
1770 option flags in use. */
1773 print_version (stderr
, "");
1775 print_switch_values (print_to_stderr
);
1778 if (flag_syntax_only
)
1780 write_symbols
= NO_DEBUG
;
1784 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1786 if (debug_info_level
== DINFO_LEVEL_NONE
)
1787 write_symbols
= NO_DEBUG
;
1789 /* Now we know write_symbols, set up the debug hooks based on it.
1790 By default we do nothing for debug output. */
1791 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1792 default_debug_hooks
= &do_nothing_debug_hooks
;
1793 #if defined(DBX_DEBUGGING_INFO)
1794 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1795 default_debug_hooks
= &dbx_debug_hooks
;
1797 #if defined(XCOFF_DEBUGGING_INFO)
1798 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1799 default_debug_hooks
= &xcoff_debug_hooks
;
1801 #ifdef SDB_DEBUGGING_INFO
1802 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1803 default_debug_hooks
= &sdb_debug_hooks
;
1805 #ifdef DWARF2_DEBUGGING_INFO
1806 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1807 default_debug_hooks
= &dwarf2_debug_hooks
;
1809 #ifdef VMS_DEBUGGING_INFO
1810 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1811 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1812 default_debug_hooks
= &vmsdbg_debug_hooks
;
1815 if (write_symbols
== NO_DEBUG
)
1817 #if defined(DBX_DEBUGGING_INFO)
1818 else if (write_symbols
== DBX_DEBUG
)
1819 debug_hooks
= &dbx_debug_hooks
;
1821 #if defined(XCOFF_DEBUGGING_INFO)
1822 else if (write_symbols
== XCOFF_DEBUG
)
1823 debug_hooks
= &xcoff_debug_hooks
;
1825 #ifdef SDB_DEBUGGING_INFO
1826 else if (write_symbols
== SDB_DEBUG
)
1827 debug_hooks
= &sdb_debug_hooks
;
1829 #ifdef DWARF2_DEBUGGING_INFO
1830 else if (write_symbols
== DWARF2_DEBUG
)
1831 debug_hooks
= &dwarf2_debug_hooks
;
1833 #ifdef VMS_DEBUGGING_INFO
1834 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1835 debug_hooks
= &vmsdbg_debug_hooks
;
1838 error ("target system does not support the \"%s\" debug format",
1839 debug_type_names
[write_symbols
]);
1841 /* Now we know which debug output will be used so we can set
1842 flag_var_tracking, flag_rename_registers if the user has
1843 not specified them. */
1844 if (debug_info_level
< DINFO_LEVEL_NORMAL
1845 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1847 if (flag_var_tracking
== 1
1848 || flag_var_tracking_uninit
== 1)
1850 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1851 warning (0, "variable tracking requested, but useless unless "
1852 "producing debug info");
1854 warning (0, "variable tracking requested, but not supported "
1855 "by this debug format");
1857 flag_var_tracking
= 0;
1858 flag_var_tracking_uninit
= 0;
1861 if (flag_rename_registers
== AUTODETECT_VALUE
)
1862 flag_rename_registers
= default_debug_hooks
->var_location
1863 != do_nothing_debug_hooks
.var_location
;
1865 if (flag_var_tracking
== AUTODETECT_VALUE
)
1866 flag_var_tracking
= optimize
>= 1;
1868 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1869 #ifdef HAVE_conditional_move
1870 flag_tree_cselim
= 1;
1872 flag_tree_cselim
= 0;
1875 /* If the user specifically requested variable tracking with tagging
1876 uninitialized variables, we need to turn on variable tracking.
1877 (We already determined above that variable tracking is feasible.) */
1878 if (flag_var_tracking_uninit
)
1879 flag_var_tracking
= 1;
1881 /* If auxiliary info generation is desired, open the output file.
1882 This goes in the same directory as the source file--unlike
1883 all the other output files. */
1884 if (flag_gen_aux_info
)
1886 aux_info_file
= fopen (aux_info_file_name
, "w");
1887 if (aux_info_file
== 0)
1888 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1891 if (! targetm
.have_named_sections
)
1893 if (flag_function_sections
)
1895 warning (0, "-ffunction-sections not supported for this target");
1896 flag_function_sections
= 0;
1898 if (flag_data_sections
)
1900 warning (0, "-fdata-sections not supported for this target");
1901 flag_data_sections
= 0;
1905 if (flag_function_sections
&& profile_flag
)
1907 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1908 flag_function_sections
= 0;
1911 #ifndef HAVE_prefetch
1912 if (flag_prefetch_loop_arrays
)
1914 warning (0, "-fprefetch-loop-arrays not supported for this target");
1915 flag_prefetch_loop_arrays
= 0;
1918 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1920 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1921 flag_prefetch_loop_arrays
= 0;
1925 /* This combination of options isn't handled for i386 targets and doesn't
1926 make much sense anyway, so don't allow it. */
1927 if (flag_prefetch_loop_arrays
&& optimize_size
)
1929 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1930 flag_prefetch_loop_arrays
= 0;
1933 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1934 if (flag_signaling_nans
)
1935 flag_trapping_math
= 1;
1937 /* We cannot reassociate if we want traps or signed zeros. Â */
1938 if (flag_associative_math
&& (flag_trapping_math
|| flag_signed_zeros
))
1940 warning (0, "-fassociative-math disabled; other options take precedence");
1941 flag_associative_math
= 0;
1944 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1945 if (flag_cx_limited_range
)
1946 flag_complex_method
= 0;
1948 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1949 if (flag_cx_fortran_rules
)
1950 flag_complex_method
= 1;
1952 /* Targets must be able to place spill slots at lower addresses. If the
1953 target already uses a soft frame pointer, the transition is trivial. */
1954 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1956 warning (0, "-fstack-protector not supported for this target");
1957 flag_stack_protect
= 0;
1959 if (!flag_stack_protect
)
1960 warn_stack_protect
= 0;
1962 /* ??? Unwind info is not correct around the CFG unless either a frame
1963 pointer is present or A_O_A is set. Fixing this requires rewriting
1964 unwind info generation to be aware of the CFG and propagating states
1966 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
1967 && flag_omit_frame_pointer
)
1969 warning (0, "unwind tables currently require a frame pointer "
1971 flag_omit_frame_pointer
= 0;
1975 /* This function can be called multiple times to reinitialize the compiler
1976 back end when register classes or instruction sets have changed,
1977 before each function. */
1979 backend_init_target (void)
1981 /* Initialize alignment variables. */
1984 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1985 to initialize reg_raw_mode[]. */
1988 /* This invokes target hooks to set fixed_reg[] etc, which is
1992 /* This depends on stack_pointer_rtx. */
1993 init_fake_stack_mems ();
1995 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
1997 init_alias_target ();
1999 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2002 /* The following initialization functions need to generate rtl, so
2003 provide a dummy function context for them. */
2004 init_dummy_function_start ();
2006 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2007 on a mode change. */
2010 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2011 after a mode change as well. */
2012 if (flag_caller_saves
)
2013 init_caller_save ();
2014 expand_dummy_function_end ();
2017 /* Initialize the compiler back end. This function is called only once,
2018 when starting the compiler. */
2022 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2023 || debug_info_level
== DINFO_LEVEL_VERBOSE
2024 #ifdef VMS_DEBUGGING_INFO
2025 /* Enable line number info for traceback. */
2026 || debug_info_level
> DINFO_LEVEL_NONE
2028 || flag_test_coverage
);
2031 init_inline_once ();
2032 init_varasm_once ();
2033 save_register_info ();
2035 /* Initialize the target-specific back end pieces. */
2037 backend_init_target ();
2040 /* Initialize things that are both lang-dependent and target-dependent.
2041 This function can be called more than once if target parameters change. */
2043 lang_dependent_init_target (void)
2045 /* This creates various _DECL nodes, so needs to be called after the
2046 front end is initialized. It also depends on the HAVE_xxx macros
2047 generated from the target machine description. */
2050 /* The following initialization functions need to generate rtl, so
2051 provide a dummy function context for them. */
2052 init_dummy_function_start ();
2054 /* Do the target-specific parts of expr initialization. */
2055 init_expr_target ();
2057 /* Although the actions of these functions are language-independent,
2058 they use optabs, so we cannot call them from backend_init. */
2062 expand_dummy_function_end ();
2065 /* Language-dependent initialization. Returns nonzero on success. */
2067 lang_dependent_init (const char *name
)
2069 location_t save_loc
= input_location
;
2070 if (dump_base_name
== 0)
2071 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
2073 /* Other front-end initialization. */
2074 input_location
= BUILTINS_LOCATION
;
2075 if (lang_hooks
.init () == 0)
2077 input_location
= save_loc
;
2079 init_asm_output (name
);
2081 /* This creates various _DECL nodes, so needs to be called after the
2082 front end is initialized. */
2085 /* Do the target-specific parts of the initialization. */
2086 lang_dependent_init_target ();
2088 /* If dbx symbol table desired, initialize writing it and output the
2089 predefined types. */
2090 timevar_push (TV_SYMOUT
);
2092 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2093 if (dwarf2out_do_frame ())
2094 dwarf2out_frame_init ();
2097 /* Now we have the correct original filename, we can initialize
2099 (*debug_hooks
->init
) (name
);
2101 timevar_pop (TV_SYMOUT
);
2107 /* Reinitialize everything when target parameters, such as register usage,
2110 target_reinit (void)
2112 /* Reinitialize RTL backend. */
2113 backend_init_target ();
2115 /* Reinitialize lang-dependent parts. */
2116 lang_dependent_init_target ();
2120 dump_memory_report (bool final
)
2122 ggc_print_statistics ();
2123 stringpool_statistics ();
2124 dump_tree_statistics ();
2125 dump_gimple_statistics ();
2126 dump_rtx_statistics ();
2127 dump_varray_statistics ();
2128 dump_alloc_pool_statistics ();
2129 dump_bitmap_statistics ();
2130 dump_vec_loc_statistics ();
2131 dump_ggc_loc_statistics (final
);
2134 /* Clean up: close opened files, etc. */
2139 /* Close the dump files. */
2140 if (flag_gen_aux_info
)
2142 fclose (aux_info_file
);
2144 unlink (aux_info_file_name
);
2147 /* Close non-debugging input and output files. Take special care to note
2148 whether fclose returns an error, since the pages might still be on the
2149 buffer chain while the file is open. */
2153 if (ferror (asm_out_file
) != 0)
2154 fatal_error ("error writing to %s: %m", asm_file_name
);
2155 if (fclose (asm_out_file
) != 0)
2156 fatal_error ("error closing %s: %m", asm_file_name
);
2160 finish_optimization_passes ();
2165 dump_memory_report (true);
2167 /* Language-specific end of compilation actions. */
2168 lang_hooks
.finish ();
2171 /* Initialize the compiler, and compile the input file. */
2175 /* Initialize timing first. The C front ends read the main file in
2176 the post_options hook, and C++ does file timings. */
2177 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2179 timevar_start (TV_TOTAL
);
2183 /* Don't do any more if an error has already occurred. */
2186 /* This must be run always, because it is needed to compute the FP
2187 predefined macros, such as __LDBL_MAX__, for targets using non
2188 default FP formats. */
2189 init_adjust_machine_modes ();
2191 /* Set up the back-end if requested. */
2195 /* Language-dependent initialization. Returns true on success. */
2196 if (lang_dependent_init (main_input_filename
))
2202 /* Stop timing and print the times. */
2203 timevar_stop (TV_TOTAL
);
2204 timevar_print (stderr
);
2207 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2208 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2209 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2211 It is not safe to call this function more than once. */
2214 toplev_main (unsigned int argc
, const char **argv
)
2218 /* Initialization of GCC's environment, and diagnostics. */
2219 general_init (argv
[0]);
2221 /* Parse the options and do minimal processing; basically just
2222 enough to default flags appropriately. */
2223 decode_options (argc
, argv
);
2227 /* Exit early if we can (e.g. -help). */
2228 if (!exit_after_options
)
2231 if (warningcount
|| errorcount
)
2232 print_ignored_options ();
2234 if (errorcount
|| sorrycount
)
2235 return (FATAL_EXIT_CODE
);
2237 return (SUCCESS_EXIT_CODE
);