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 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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"
69 #include "dwarf2asm.h"
70 #include "integrate.h"
74 #include "langhooks.h"
75 #include "cfglayout.h"
77 #include "hosthooks.h"
81 #include "value-prof.h"
82 #include "alloc-pool.h"
83 #include "tree-mudflap.h"
85 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
86 #include "dwarf2out.h"
89 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
93 #ifdef SDB_DEBUGGING_INFO
97 #ifdef XCOFF_DEBUGGING_INFO
98 #include "xcoffout.h" /* Needed for external data
99 declarations for e.g. AIX 4.x. */
102 static void general_init (const char *);
103 static void do_compile (void);
104 static void process_options (void);
105 static void backend_init (void);
106 static int lang_dependent_init (const char *);
107 static void init_asm_output (const char *);
108 static void finalize (void);
110 static void crash_signal (int) ATTRIBUTE_NORETURN
;
111 static void setup_core_dumping (void);
112 static void compile_file (void);
114 static int print_single_switch (FILE *, int, int, const char *,
115 const char *, const char *,
116 const char *, const char *);
117 static void print_switch_values (FILE *, int, int, const char *,
118 const char *, const char *);
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 /* Name of program invoked, sans directories. */
131 const char *progname
;
133 /* Copy of argument vector to toplev_main. */
134 static const char **save_argv
;
136 /* Name of top-level original source file (what was input to cpp).
137 This comes from the #-command at the beginning of the actual input.
138 If there isn't any there, then this is the cc1 input file name. */
140 const char *main_input_filename
;
142 #ifndef USE_MAPPED_LOCATION
143 location_t unknown_location
= { NULL
, 0 };
146 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
147 to optimize and default_debug_hooks in process_options (). */
148 #define AUTODETECT_FLAG_VAR_TRACKING 2
150 /* Current position in real source file. */
152 location_t input_location
;
154 struct line_maps line_table
;
156 /* Nonzero if it is unsafe to create any new pseudo registers. */
159 /* Stack of currently pending input files. */
161 struct file_stack
*input_file_stack
;
163 /* Incremented on each change to input_file_stack. */
164 int input_file_stack_tick
;
166 /* Name to use as base of names for dump output files. */
168 const char *dump_base_name
;
170 /* Name to use as a base for auxiliary output files. */
172 const char *aux_base_name
;
174 /* Bit flags that specify the machine subtype we are compiling for.
175 Bits are tested using macros TARGET_... defined in the tm.h file
176 and set by `-m...' switches. Must be defined in rtlanal.c. */
178 extern int target_flags
;
180 /* A mask of target_flags that includes bit X if X was set or cleared
181 on the command line. */
183 int target_flags_explicit
;
185 /* Debug hooks - dependent upon command line options. */
187 const struct gcc_debug_hooks
*debug_hooks
;
189 /* Debug hooks - target default. */
191 static const struct gcc_debug_hooks
*default_debug_hooks
;
193 /* Other flags saying which kinds of debugging dump have been requested. */
195 int rtl_dump_and_exit
;
196 int flag_print_asm_name
;
197 enum graph_dump_types graph_dump_format
;
199 /* Name for output file of assembly code, specified with -o. */
201 const char *asm_file_name
;
203 /* Nonzero means do optimizations. -O.
204 Particular numeric values stand for particular amounts of optimization;
205 thus, -O2 stores 2 here. However, the optimizations beyond the basic
206 ones are not controlled directly by this variable. Instead, they are
207 controlled by individual `flag_...' variables that are defaulted
208 based on this variable. */
212 /* Nonzero means optimize for size. -Os.
213 The only valid values are zero and nonzero. When optimize_size is
214 nonzero, optimize defaults to 2, but certain individual code
215 bloating optimizations are disabled. */
217 int optimize_size
= 0;
219 /* The FUNCTION_DECL for the function currently being compiled,
220 or 0 if between functions. */
221 tree current_function_decl
;
223 /* Set to the FUNC_BEGIN label of the current function, or NULL
225 const char * current_function_func_begin_label
;
227 /* Temporarily suppress certain warnings.
228 This is set while reading code from a system header file. */
230 int in_system_header
= 0;
232 /* Nonzero means to collect statistics which might be expensive
233 and to print them when we are done. */
234 int flag_detailed_statistics
= 0;
236 /* A random sequence of characters, unless overridden by user. */
237 const char *flag_random_seed
;
239 /* A local time stamp derived from the time of compilation. It will be
240 zero if the system cannot provide a time. It will be -1u, if the
241 user has specified a particular random seed. */
246 /* Nonzero means `char' should be signed. */
248 int flag_signed_char
;
250 /* Nonzero means give an enum type only as many bytes as it needs. A value
251 of 2 means it has not yet been initialized. */
253 int flag_short_enums
;
255 /* Nonzero if structures and unions should be returned in memory.
257 This should only be defined if compatibility with another compiler or
258 with an ABI is needed, because it results in slower code. */
260 #ifndef DEFAULT_PCC_STRUCT_RETURN
261 #define DEFAULT_PCC_STRUCT_RETURN 1
264 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
266 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
268 /* 0 means straightforward implementation of complex divide acceptable.
269 1 means wide ranges of inputs must work for complex divide.
270 2 means C99-like requirements for complex divide (not yet implemented). */
272 int flag_complex_divide_method
= 0;
274 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
275 not just because the tree inliner turned us off. */
277 int flag_really_no_inline
= 2;
279 /* Nonzero means we should be saving declaration info into a .X file. */
281 int flag_gen_aux_info
= 0;
283 /* Specified name of aux-info file. */
285 const char *aux_info_file_name
;
287 /* Nonzero if we are compiling code for a shared library, zero for
292 /* Set to the default thread-local storage (tls) model to use. */
294 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
296 /* Nonzero means change certain warnings into errors.
297 Usually these are warnings about failure to conform to some standard. */
299 int flag_pedantic_errors
= 0;
301 /* -dA causes debug commentary information to be produced in
302 the generated assembly code (to make it more readable). This option
303 is generally only of use to those who actually need to read the
304 generated assembly code (perhaps while debugging the compiler itself).
305 Currently, this switch is only used by dwarfout.c; however, it is intended
306 to be a catchall for printing debug information in the assembler file. */
308 int flag_debug_asm
= 0;
310 /* -dP causes the rtl to be emitted as a comment in assembly. */
312 int flag_dump_rtl_in_asm
= 0;
314 /* When non-NULL, indicates that whenever space is allocated on the
315 stack, the resulting stack pointer must not pass this
316 address---that is, for stacks that grow downward, the stack pointer
317 must always be greater than or equal to this address; for stacks
318 that grow upward, the stack pointer must be less than this address.
319 At present, the rtx may be either a REG or a SYMBOL_REF, although
320 the support provided depends on the backend. */
323 /* If one, renumber instruction UIDs to reduce the number of
324 unused UIDs if there are a lot of instructions. If greater than
325 one, unconditionally renumber instruction UIDs. */
326 int flag_renumber_insns
= 1;
328 /* Nonzero if we should track variables. When
329 flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING it will be set according
330 to optimize, debug_info_level and debug_hooks in process_options (). */
331 int flag_var_tracking
= AUTODETECT_FLAG_VAR_TRACKING
;
333 /* True if the user has tagged the function with the 'section'
336 bool user_defined_section_attribute
= false;
338 /* Values of the -falign-* flags: how much to align labels in code.
339 0 means `use default', 1 means `don't align'.
340 For each variable, there is an _log variant which is the power
341 of two not less than the variable, for .align output. */
344 int align_loops_max_skip
;
346 int align_jumps_max_skip
;
347 int align_labels_log
;
348 int align_labels_max_skip
;
349 int align_functions_log
;
351 /* Like align_functions_log above, but used by front-ends to force the
352 minimum function alignment. Zero means no alignment is forced. */
353 int force_align_functions_log
;
357 const char *const string
;
361 lang_independent_options
;
363 /* Nonzero if subexpressions must be evaluated from left-to-right. */
364 int flag_evaluation_order
= 0;
366 /* The user symbol prefix after having resolved same. */
367 const char *user_label_prefix
;
369 static const param_info lang_independent_params
[] = {
370 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
371 { OPTION, DEFAULT, MIN, MAX, HELP },
372 #include "params.def"
374 { NULL
, 0, 0, 0, NULL
}
377 /* Here is a table, controlled by the tm.h file, listing each -m switch
378 and which bits in `target_switches' it should set or clear.
379 If VALUE is positive, it is bits to set.
380 If VALUE is negative, -VALUE is bits to clear.
381 (The sign bit is not used so there is no confusion.) */
385 const char *const name
;
387 const char *const description
;
389 target_switches
[] = TARGET_SWITCHES
;
391 /* This table is similar, but allows the switch to have a value. */
393 #ifdef TARGET_OPTIONS
396 const char *const prefix
;
397 const char **const variable
;
398 const char *const description
;
399 const char *const value
;
401 target_options
[] = TARGET_OPTIONS
;
404 /* Nonzero means warn about function definitions that default the return type
405 or that use a null return and have a return-type other than void. */
407 int warn_return_type
;
409 /* Output files for assembler code (real compiler output)
410 and debugging dumps. */
414 FILE *dump_file
= NULL
;
415 const char *dump_file_name
;
417 /* The current working directory of a translation. It's generally the
418 directory from which compilation was initiated, but a preprocessed
419 file may specify the original directory in which it was
422 static const char *src_pwd
;
424 /* Initialize src_pwd with the given string, and return true. If it
425 was already initialized, return false. As a special case, it may
426 be called with a NULL argument to test whether src_pwd has NOT been
430 set_src_pwd (const char *pwd
)
434 if (strcmp (src_pwd
, pwd
) == 0)
440 src_pwd
= xstrdup (pwd
);
444 /* Return the directory from which the translation unit was initiated,
445 in case set_src_pwd() was not called before to assign it a
457 /* Called when the start of a function definition is parsed,
458 this function prints on stderr the name of the function. */
460 announce_function (tree decl
)
464 if (rtl_dump_and_exit
)
465 verbatim ("%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
467 verbatim (" %s", lang_hooks
.decl_printable_name (decl
, 2));
469 pp_needs_newline (global_dc
->printer
) = true;
470 diagnostic_set_last_function (global_dc
);
474 /* Set up a default flag_random_seed and local_tick, unless the user
475 already specified one. */
480 if (!flag_random_seed
)
482 unsigned HOST_WIDE_INT value
;
483 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
485 /* Get some more or less random data. */
486 #ifdef HAVE_GETTIMEOFDAY
490 gettimeofday (&tv
, NULL
);
491 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
495 time_t now
= time (NULL
);
497 if (now
!= (time_t)-1)
498 local_tick
= (unsigned) now
;
501 value
= local_tick
^ getpid ();
503 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
504 flag_random_seed
= random_seed
;
506 else if (!local_tick
)
511 /* Decode the string P as an integral parameter.
512 If the string is indeed an integer return its numeric value else
513 issue an Invalid Option error for the option PNAME and return DEFVAL.
514 If PNAME is zero just return DEFVAL, do not call error. */
517 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
519 const char *endp
= p
;
532 error ("invalid option argument %qs", pname
);
539 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
540 If X is 0, return -1. */
543 floor_log2 (unsigned HOST_WIDE_INT x
)
551 t
= HOST_BITS_PER_WIDE_INT
- 1 - (int) CLZ_HWI (x
);
553 if (HOST_BITS_PER_WIDE_INT
> 64)
554 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
556 if (HOST_BITS_PER_WIDE_INT
> 32)
557 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
559 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
561 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
563 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
565 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
567 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
574 /* Return the logarithm of X, base 2, considering X unsigned,
575 if X is a power of 2. Otherwise, returns -1. */
578 exact_log2 (unsigned HOST_WIDE_INT x
)
583 return x
? CTZ_HWI (x
) : -1;
585 return floor_log2 (x
);
589 /* Handler for fatal signals, such as SIGSEGV. These are transformed
590 into ICE messages, which is much more user friendly. In case the
591 error printer crashes, reset the signal to prevent infinite recursion. */
594 crash_signal (int signo
)
596 signal (signo
, SIG_DFL
);
598 /* If we crashed while processing an ASM statement, then be a little more
599 graceful. It's most likely the user's fault. */
600 if (this_is_asm_operands
)
602 output_operand_lossage ("unrecoverable error");
603 exit (FATAL_EXIT_CODE
);
606 internal_error ("%s", strsignal (signo
));
609 /* Arrange to dump core on error. (The regular error message is still
610 printed first, except in the case of abort().) */
613 setup_core_dumping (void)
616 signal (SIGABRT
, SIG_DFL
);
618 #if defined(HAVE_SETRLIMIT)
621 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
622 fatal_error ("getting core file size maximum limit: %m");
623 rlim
.rlim_cur
= rlim
.rlim_max
;
624 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
625 fatal_error ("setting core file size limit to maximum: %m");
628 diagnostic_abort_on_error (global_dc
);
632 /* Strip off a legitimate source ending from the input string NAME of
633 length LEN. Rather than having to know the names used by all of
634 our front ends, we strip off an ending of a period followed by
635 up to five characters. (Java uses ".class".) */
638 strip_off_ending (char *name
, int len
)
641 for (i
= 2; i
< 6 && len
> i
; i
++)
643 if (name
[len
- i
] == '.')
645 name
[len
- i
] = '\0';
651 /* Output a quoted string. */
654 output_quoted_string (FILE *asm_file
, const char *string
)
656 #ifdef OUTPUT_QUOTED_STRING
657 OUTPUT_QUOTED_STRING (asm_file
, string
);
661 putc ('\"', asm_file
);
662 while ((c
= *string
++) != 0)
666 if (c
== '\"' || c
== '\\')
667 putc ('\\', asm_file
);
671 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
673 putc ('\"', asm_file
);
677 /* Output a file name in the form wanted by System V. */
680 output_file_directive (FILE *asm_file
, const char *input_name
)
685 if (input_name
== NULL
)
686 input_name
= "<stdin>";
688 len
= strlen (input_name
);
689 na
= input_name
+ len
;
691 /* NA gets INPUT_NAME sans directory names. */
692 while (na
> input_name
)
694 if (IS_DIR_SEPARATOR (na
[-1]))
699 #ifdef ASM_OUTPUT_SOURCE_FILENAME
700 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
702 fprintf (asm_file
, "\t.file\t");
703 output_quoted_string (asm_file
, na
);
704 fputc ('\n', asm_file
);
708 /* Do any final processing required for the declarations in VEC, of
709 which there are LEN. We write out inline functions and variables
710 that have been deferred until this point, but which are required.
711 Returns nonzero if anything was put out. */
714 wrapup_global_declarations (tree
*vec
, int len
)
719 int output_something
= 0;
721 for (i
= 0; i
< len
; i
++)
725 /* We're not deferring this any longer. Assignment is
726 conditional to avoid needlessly dirtying PCH pages. */
727 if (DECL_DEFER_OUTPUT (decl
) != 0)
728 DECL_DEFER_OUTPUT (decl
) = 0;
730 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
731 lang_hooks
.finish_incomplete_decl (decl
);
734 /* Now emit any global variables or functions that we have been
735 putting off. We need to loop in case one of the things emitted
736 here references another one which comes earlier in the list. */
740 for (i
= 0; i
< len
; i
++)
744 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
747 /* Don't write out static consts, unless we still need them.
749 We also keep static consts if not optimizing (for debugging),
750 unless the user specified -fno-keep-static-consts.
751 ??? They might be better written into the debug information.
752 This is possible when using DWARF.
754 A language processor that wants static constants to be always
755 written out (even if it is not used) is responsible for
756 calling rest_of_decl_compilation itself. E.g. the C front-end
757 calls rest_of_decl_compilation from finish_decl.
758 One motivation for this is that is conventional in some
759 environments to write things like:
760 static const char rcsid[] = "... version string ...";
761 intending to force the string to be in the executable.
763 A language processor that would prefer to have unneeded
764 static constants "optimized away" would just defer writing
765 them out until here. E.g. C++ does this, because static
766 constants are often defined in header files.
768 ??? A tempting alternative (for both C and C++) would be
769 to force a constant to be written if and only if it is
770 defined in a main file, as opposed to an include file. */
772 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
774 struct cgraph_varpool_node
*node
;
776 node
= cgraph_varpool_node (decl
);
778 if (flag_unit_at_a_time
&& node
->finalized
)
780 else if ((flag_unit_at_a_time
&& !cgraph_global_info_ready
)
782 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
784 else if (node
->needed
)
786 else if (DECL_COMDAT (decl
))
788 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
789 && (optimize
|| !flag_keep_static_consts
790 || DECL_ARTIFICIAL (decl
)))
796 rest_of_decl_compilation (decl
, 1, 1);
802 output_something
= 1;
806 return output_something
;
809 /* Issue appropriate warnings for the global declarations in VEC (of
810 which there are LEN). Output debugging information for them. */
813 check_global_declarations (tree
*vec
, int len
)
818 for (i
= 0; i
< len
; i
++)
822 /* Do not emit debug information about variables that are in
823 static storage, but not defined. */
824 if (TREE_CODE (decl
) == VAR_DECL
825 && TREE_STATIC (decl
)
826 && !TREE_ASM_WRITTEN (decl
))
827 DECL_IGNORED_P (decl
) = 1;
829 /* Warn about any function
830 declared static but not defined.
831 We don't warn about variables,
832 because many programs have static variables
833 that exist only to get some text into the object file. */
834 if (TREE_CODE (decl
) == FUNCTION_DECL
835 && DECL_INITIAL (decl
) == 0
836 && DECL_EXTERNAL (decl
)
837 && ! DECL_ARTIFICIAL (decl
)
838 && ! TREE_NO_WARNING (decl
)
839 && ! TREE_PUBLIC (decl
)
840 && (warn_unused_function
841 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
843 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
844 pedwarn ("%J%qF used but never defined", decl
, decl
);
846 warning ("%J%qF declared %<static%> but never defined",
848 /* This symbol is effectively an "extern" declaration now. */
849 TREE_PUBLIC (decl
) = 1;
850 assemble_external (decl
);
853 /* Warn about static fns or vars defined but not used. */
854 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
855 /* We don't warn about "static const" variables because the
856 "rcs_id" idiom uses that construction. */
857 || (warn_unused_variable
858 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
859 && ! DECL_IN_SYSTEM_HEADER (decl
)
860 && ! TREE_USED (decl
)
861 /* The TREE_USED bit for file-scope decls is kept in the identifier,
862 to handle multiple external decls in different scopes. */
863 && ! TREE_USED (DECL_NAME (decl
))
864 && ! DECL_EXTERNAL (decl
)
865 && ! TREE_PUBLIC (decl
)
866 /* A volatile variable might be used in some non-obvious way. */
867 && ! TREE_THIS_VOLATILE (decl
)
868 /* Global register variables must be declared to reserve them. */
869 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
870 /* Otherwise, ask the language. */
871 && lang_hooks
.decls
.warn_unused_global (decl
))
872 warning ("%J%qD defined but not used", decl
, decl
);
874 /* Avoid confusing the debug information machinery when there are
876 if (errorcount
== 0 && sorrycount
== 0)
878 timevar_push (TV_SYMOUT
);
879 (*debug_hooks
->global_decl
) (decl
);
880 timevar_pop (TV_SYMOUT
);
885 /* Warn about a use of an identifier which was marked deprecated. */
887 warn_deprecated_use (tree node
)
889 if (node
== 0 || !warn_deprecated_decl
)
894 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
895 warning ("%qs is deprecated (declared at %s:%d)",
896 IDENTIFIER_POINTER (DECL_NAME (node
)),
897 xloc
.file
, xloc
.line
);
899 else if (TYPE_P (node
))
901 const char *what
= NULL
;
902 tree decl
= TYPE_STUB_DECL (node
);
904 if (TYPE_NAME (node
))
906 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
907 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
908 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
909 && DECL_NAME (TYPE_NAME (node
)))
910 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
915 expanded_location xloc
916 = expand_location (DECL_SOURCE_LOCATION (decl
));
918 warning ("%qs is deprecated (declared at %s:%d)", what
,
919 xloc
.file
, xloc
.line
);
921 warning ("type is deprecated (declared at %s:%d)",
922 xloc
.file
, xloc
.line
);
927 warning ("%qs is deprecated", what
);
929 warning ("type is deprecated");
934 /* Save the current INPUT_LOCATION on the top entry in the
935 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
936 INPUT_LOCATION accordingly. */
939 #ifdef USE_MAPPED_LOCATION
940 push_srcloc (location_t fline
)
942 push_srcloc (const char *file
, int line
)
945 struct file_stack
*fs
;
947 fs
= xmalloc (sizeof (struct file_stack
));
948 fs
->location
= input_location
;
949 fs
->next
= input_file_stack
;
950 #ifdef USE_MAPPED_LOCATION
951 input_location
= fline
;
953 input_filename
= file
;
956 input_file_stack
= fs
;
957 input_file_stack_tick
++;
960 /* Pop the top entry off the stack of presently open source files.
961 Restore the INPUT_LOCATION from the new topmost entry on the
967 struct file_stack
*fs
;
969 fs
= input_file_stack
;
970 input_location
= fs
->location
;
971 input_file_stack
= fs
->next
;
973 input_file_stack_tick
++;
976 /* Compile an entire translation unit. Write a file of assembly
977 output and various debugging dumps. */
982 /* Initialize yet another pass. */
985 init_final (main_input_filename
);
986 coverage_init (aux_base_name
);
988 timevar_push (TV_PARSE
);
990 /* Call the parser, which parses the entire file (calling
991 rest_of_compilation for each function). */
992 lang_hooks
.parse_file (set_yydebug
);
994 /* In case there were missing block closers,
995 get us back to the global binding level. */
996 lang_hooks
.clear_binding_stack ();
998 /* Compilation is now finished except for writing
999 what's left of the symbol table output. */
1000 timevar_pop (TV_PARSE
);
1002 if (flag_syntax_only
)
1005 lang_hooks
.decls
.final_write_globals ();
1007 cgraph_varpool_assemble_pending_decls ();
1009 /* This must occur after the loop to output deferred functions.
1010 Else the coverage initializer would not be emitted if all the
1011 functions in this compilation unit were deferred. */
1014 /* Likewise for mudflap static object registrations. */
1016 mudflap_finish_file ();
1018 /* Write out any pending weak symbol declarations. */
1022 /* Do dbx symbols. */
1023 timevar_push (TV_SYMOUT
);
1025 #ifdef DWARF2_UNWIND_INFO
1026 if (dwarf2out_do_frame ())
1027 dwarf2out_frame_finish ();
1030 (*debug_hooks
->finish
) (main_input_filename
);
1031 timevar_pop (TV_SYMOUT
);
1033 /* Output some stuff at end of file if nec. */
1035 dw2_output_indirect_constants ();
1037 /* Flush any pending external directives. cgraph did this for
1038 assemble_external calls from the front end, but the RTL
1039 expander can also generate them. */
1040 process_pending_assemble_externals ();
1042 /* Attach a special .ident directive to the end of the file to identify
1043 the version of GCC which compiled this code. The format of the .ident
1044 string is patterned after the ones produced by native SVR4 compilers. */
1047 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
1048 IDENT_ASM_OP
, version_string
);
1051 /* This must be at the end. Some target ports emit end of file directives
1052 into the assembly file here, and hence we can not output anything to the
1053 assembly file after this point. */
1054 targetm
.asm_out
.file_end ();
1057 /* Display help for target options. */
1059 display_target_options (void)
1062 static bool displayed
= false;
1064 /* Avoid double printing for --help --target-help. */
1070 if (ARRAY_SIZE (target_switches
) > 1
1071 #ifdef TARGET_OPTIONS
1072 || ARRAY_SIZE (target_options
) > 1
1080 printf (_("\nTarget specific options:\n"));
1082 for (i
= ARRAY_SIZE (target_switches
); i
--;)
1084 const char *option
= target_switches
[i
].name
;
1085 const char *description
= target_switches
[i
].description
;
1087 if (option
== NULL
|| *option
== 0)
1089 else if (description
== NULL
)
1094 printf (_(" -m%-23s [undocumented]\n"), option
);
1096 else if (*description
!= 0)
1097 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1100 #ifdef TARGET_OPTIONS
1101 for (i
= ARRAY_SIZE (target_options
); i
--;)
1103 const char *option
= target_options
[i
].prefix
;
1104 const char *description
= target_options
[i
].description
;
1106 if (option
== NULL
|| *option
== 0)
1108 else if (description
== NULL
)
1113 printf (_(" -m%-23s [undocumented]\n"), option
);
1115 else if (*description
!= 0)
1116 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1122 printf (_("\nThere are undocumented target specific options as well.\n"));
1124 printf (_(" They exist, but they are not documented.\n"));
1129 /* Parse a -d... command line switch. */
1132 decode_d_option (const char *arg
)
1143 flag_print_asm_name
= 1;
1146 flag_dump_rtl_in_asm
= 1;
1147 flag_print_asm_name
= 1;
1150 graph_dump_format
= vcg
;
1153 rtl_dump_and_exit
= 1;
1158 case 'D': /* These are handled by the preprocessor. */
1162 setup_core_dumping();
1167 if (!enable_rtl_dump_file (c
))
1168 warning ("unrecognized gcc debugging option: %c", c
);
1173 /* Indexed by enum debug_info_type. */
1174 const char *const debug_type_names
[] =
1176 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1179 /* Decode -m switches. */
1180 /* Decode the switch -mNAME. */
1183 set_target_switch (const char *name
)
1186 int valid_target_option
= 0;
1188 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1189 if (!strcmp (target_switches
[j
].name
, name
))
1191 if (target_switches
[j
].value
< 0)
1192 target_flags
&= ~-target_switches
[j
].value
;
1194 target_flags
|= target_switches
[j
].value
;
1197 if (target_switches
[j
].value
< 0)
1198 target_flags_explicit
|= -target_switches
[j
].value
;
1200 target_flags_explicit
|= target_switches
[j
].value
;
1202 valid_target_option
= 1;
1205 #ifdef TARGET_OPTIONS
1206 if (!valid_target_option
)
1207 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1209 int len
= strlen (target_options
[j
].prefix
);
1210 if (target_options
[j
].value
)
1212 if (!strcmp (target_options
[j
].prefix
, name
))
1214 *target_options
[j
].variable
= target_options
[j
].value
;
1215 valid_target_option
= 1;
1220 if (!strncmp (target_options
[j
].prefix
, name
, len
))
1222 *target_options
[j
].variable
= name
+ len
;
1223 valid_target_option
= 1;
1229 if (!valid_target_option
)
1230 error ("invalid option %qs", name
);
1233 /* Print version information to FILE.
1234 Each line begins with INDENT (for the case where FILE is the
1235 assembler output file). */
1238 print_version (FILE *file
, const char *indent
)
1241 #define __VERSION__ "[?]"
1245 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1247 "%s%s%s version %s (%s) compiled by CC.\n"
1249 , indent
, *indent
!= 0 ? " " : "",
1250 lang_hooks
.name
, version_string
, TARGET_NAME
,
1251 indent
, __VERSION__
);
1252 fnotice (file
, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1253 indent
, *indent
!= 0 ? " " : "",
1254 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1257 /* Print an option value and return the adjusted position in the line.
1258 ??? We don't handle error returns from fprintf (disk full); presumably
1259 other code will catch a disk full though. */
1262 print_single_switch (FILE *file
, int pos
, int max
,
1263 const char *indent
, const char *sep
, const char *term
,
1264 const char *type
, const char *name
)
1266 /* The ultrix fprintf returns 0 on success, so compute the result we want
1267 here since we need it for the following test. */
1268 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
1273 fprintf (file
, "%s", term
);
1278 fprintf (file
, "%s", indent
);
1279 pos
= strlen (indent
);
1281 fprintf (file
, "%s%s%s", sep
, type
, name
);
1286 /* Print active target switches to FILE.
1287 POS is the current cursor position and MAX is the size of a "line".
1288 Each line begins with INDENT and ends with TERM.
1289 Each switch is separated from the next by SEP. */
1292 print_switch_values (FILE *file
, int pos
, int max
,
1293 const char *indent
, const char *sep
, const char *term
)
1298 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1299 that it can be printed below. This helps reproducibility. */
1302 /* Print the options as passed. */
1303 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
1304 _("options passed: "), "");
1306 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1310 if (strcmp (*p
, "-o") == 0)
1316 if (strcmp (*p
, "-quiet") == 0)
1318 if (strcmp (*p
, "-version") == 0)
1323 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
1326 fprintf (file
, "%s", term
);
1328 /* Print the -f and -m options that have been enabled.
1329 We don't handle language specific options but printing argv
1332 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
1333 _("options enabled: "), "");
1335 for (j
= 0; j
< cl_options_count
; j
++)
1337 if (!cl_options
[j
].flag_var
1338 || !(cl_options
[j
].flags
& CL_REPORT
))
1341 if (cl_options
[j
].has_set_value
)
1343 if (*cl_options
[j
].flag_var
!= cl_options
[j
].set_value
)
1348 if (!*cl_options
[j
].flag_var
)
1352 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1353 "", cl_options
[j
].opt_text
);
1356 /* Print target specific options. */
1358 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1359 if (target_switches
[j
].name
[0] != '\0'
1360 && target_switches
[j
].value
> 0
1361 && ((target_switches
[j
].value
& target_flags
)
1362 == target_switches
[j
].value
))
1364 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1365 "-m", target_switches
[j
].name
);
1368 #ifdef TARGET_OPTIONS
1369 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1370 if (*target_options
[j
].variable
!= NULL
)
1373 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
1374 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1375 prefix
, *target_options
[j
].variable
);
1379 fprintf (file
, "%s", term
);
1382 /* Open assembly code output file. Do this even if -fsyntax-only is
1383 on, because then the driver will have provided the name of a
1384 temporary file or bit bucket for us. NAME is the file specified on
1385 the command line, possibly NULL. */
1387 init_asm_output (const char *name
)
1389 if (name
== NULL
&& asm_file_name
== 0)
1390 asm_out_file
= stdout
;
1393 if (asm_file_name
== 0)
1395 int len
= strlen (dump_base_name
);
1396 char *dumpname
= xmalloc (len
+ 6);
1397 memcpy (dumpname
, dump_base_name
, len
+ 1);
1398 strip_off_ending (dumpname
, len
);
1399 strcat (dumpname
, ".s");
1400 asm_file_name
= dumpname
;
1402 if (!strcmp (asm_file_name
, "-"))
1403 asm_out_file
= stdout
;
1405 asm_out_file
= fopen (asm_file_name
, "w+b");
1406 if (asm_out_file
== 0)
1407 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1410 #ifdef IO_BUFFER_SIZE
1411 setvbuf (asm_out_file
, xmalloc (IO_BUFFER_SIZE
),
1412 _IOFBF
, IO_BUFFER_SIZE
);
1415 if (!flag_syntax_only
)
1417 targetm
.asm_out
.file_start ();
1419 #ifdef ASM_COMMENT_START
1420 if (flag_verbose_asm
)
1422 /* Print the list of options in effect. */
1423 print_version (asm_out_file
, ASM_COMMENT_START
);
1424 print_switch_values (asm_out_file
, 0, MAX_LINE
,
1425 ASM_COMMENT_START
, " ", "\n");
1426 /* Add a blank line here so it appears in assembler output but not
1428 fprintf (asm_out_file
, "\n");
1434 /* Default version of get_pch_validity.
1435 By default, every flag difference is fatal; that will be mostly right for
1436 most targets, but completely right for very few. */
1439 default_get_pch_validity (size_t *len
)
1441 #ifdef TARGET_OPTIONS
1446 *len
= sizeof (target_flags
) + 2;
1447 #ifdef TARGET_OPTIONS
1448 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1451 if (*target_options
[i
].variable
)
1452 *len
+= strlen (*target_options
[i
].variable
);
1456 result
= r
= xmalloc (*len
);
1460 memcpy (r
, &target_flags
, sizeof (target_flags
));
1461 r
+= sizeof (target_flags
);
1463 #ifdef TARGET_OPTIONS
1464 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1466 const char *str
= *target_options
[i
].variable
;
1470 l
= strlen (str
) + 1;
1479 /* Default version of pch_valid_p. */
1482 default_pch_valid_p (const void *data_p
, size_t len
)
1484 const char *data
= (const char *)data_p
;
1485 const char *flag_that_differs
= NULL
;
1488 /* -fpic and -fpie also usually make a PCH invalid. */
1489 if (data
[0] != flag_pic
)
1490 return _("created and used with different settings of -fpic");
1491 if (data
[1] != flag_pie
)
1492 return _("created and used with different settings of -fpie");
1495 /* Check target_flags. */
1496 if (memcmp (data
, &target_flags
, sizeof (target_flags
)) != 0)
1498 for (i
= 0; i
< ARRAY_SIZE (target_switches
); i
++)
1503 memcpy (&tf
, data
, sizeof (target_flags
));
1505 bits
= target_switches
[i
].value
;
1508 if ((target_flags
& bits
) != (tf
& bits
))
1510 flag_that_differs
= target_switches
[i
].name
;
1516 data
+= sizeof (target_flags
);
1517 len
-= sizeof (target_flags
);
1519 /* Check string options. */
1520 #ifdef TARGET_OPTIONS
1521 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1523 const char *str
= *target_options
[i
].variable
;
1527 l
= strlen (str
) + 1;
1528 if (len
< l
|| memcmp (data
, str
, l
) != 0)
1530 flag_that_differs
= target_options
[i
].prefix
;
1543 asprintf (&r
, _("created and used with differing settings of '-m%s'"),
1546 return _("out of memory");
1551 /* Default tree printer. Handles declarations only. */
1553 default_tree_printer (pretty_printer
* pp
, text_info
*text
)
1555 switch (*text
->format_spec
)
1561 tree t
= va_arg (*text
->args_ptr
, tree
);
1562 const char *n
= DECL_NAME (t
)
1563 ? lang_hooks
.decl_printable_name (t
, 2)
1574 /* Initialization of the front end environment, before command line
1575 options are parsed. Signal handlers, internationalization etc.
1576 ARGV0 is main's argv[0]. */
1578 general_init (const char *argv0
)
1582 p
= argv0
+ strlen (argv0
);
1583 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1587 xmalloc_set_program_name (progname
);
1591 gcc_init_libintl ();
1593 /* Initialize the diagnostics reporting machinery, so option parsing
1594 can give warnings and errors. */
1595 diagnostic_initialize (global_dc
);
1596 /* Set a default printer. Language specific initializations will
1597 override it later. */
1598 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1600 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1602 signal (SIGSEGV
, crash_signal
);
1605 signal (SIGILL
, crash_signal
);
1608 signal (SIGBUS
, crash_signal
);
1611 signal (SIGABRT
, crash_signal
);
1613 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1614 signal (SIGIOT
, crash_signal
);
1617 signal (SIGFPE
, crash_signal
);
1620 /* Other host-specific signal setup. */
1621 (*host_hooks
.extra_signals
)();
1623 /* Initialize the garbage-collector, string pools and tree type hash
1627 linemap_init (&line_table
);
1630 /* Initialize register usage now so switches may override. */
1633 /* Register the language-independent parameters. */
1634 add_params (lang_independent_params
, LAST_PARAM
);
1636 /* This must be done after add_params but before argument processing. */
1637 init_ggc_heuristics();
1638 init_tree_optimization_passes ();
1641 /* Process the options that have been parsed. */
1643 process_options (void)
1645 /* Allow the front end to perform consistency checks and do further
1646 initialization based on the command line options. This hook also
1647 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1648 so we can correctly initialize debug output. */
1649 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1650 #ifndef USE_MAPPED_LOCATION
1651 input_filename
= main_input_filename
;
1654 #ifdef OVERRIDE_OPTIONS
1655 /* Some machines may reject certain combinations of options. */
1659 if (flag_short_enums
== 2)
1660 flag_short_enums
= targetm
.default_short_enums ();
1662 /* Set aux_base_name if not already set. */
1665 else if (main_input_filename
)
1667 char *name
= xstrdup (lbasename (main_input_filename
));
1669 strip_off_ending (name
, strlen (name
));
1670 aux_base_name
= name
;
1673 aux_base_name
= "gccaux";
1675 /* Set up the align_*_log variables, defaulting them to 1 if they
1676 were still unset. */
1677 if (align_loops
<= 0) align_loops
= 1;
1678 if (align_loops_max_skip
> align_loops
|| !align_loops
)
1679 align_loops_max_skip
= align_loops
- 1;
1680 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1681 if (align_jumps
<= 0) align_jumps
= 1;
1682 if (align_jumps_max_skip
> align_jumps
|| !align_jumps
)
1683 align_jumps_max_skip
= align_jumps
- 1;
1684 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1685 if (align_labels
<= 0) align_labels
= 1;
1686 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1687 if (align_labels_max_skip
> align_labels
|| !align_labels
)
1688 align_labels_max_skip
= align_labels
- 1;
1689 if (align_functions
<= 0) align_functions
= 1;
1690 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1692 /* Unrolling all loops implies that standard loop unrolling must also
1694 if (flag_unroll_all_loops
)
1695 flag_unroll_loops
= 1;
1697 /* The loop unrolling code assumes that cse will be run after loop. */
1698 if (flag_unroll_loops
|| flag_peel_loops
)
1699 flag_rerun_cse_after_loop
= 1;
1701 /* If explicitly asked to run new loop optimizer, switch off the old
1703 if (flag_loop_optimize2
)
1704 flag_loop_optimize
= 0;
1706 /* Enable new loop optimizer pass if any of its optimizations is called. */
1707 if (flag_move_loop_invariants
1708 || flag_unswitch_loops
1710 || flag_unroll_loops
1711 || flag_branch_on_count_reg
)
1712 flag_loop_optimize2
= 1;
1714 if (flag_non_call_exceptions
)
1715 flag_asynchronous_unwind_tables
= 1;
1716 if (flag_asynchronous_unwind_tables
)
1717 flag_unwind_tables
= 1;
1719 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1721 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
1722 flag_unit_at_a_time
= 0;
1724 if (flag_value_profile_transformations
)
1725 flag_profile_values
= 1;
1727 /* Speculative prefetching implies the value profiling. We also switch off
1728 the prefetching in the loop optimizer, so that we do not emit double
1729 prefetches. TODO -- we should teach these two to cooperate; the loop
1730 based prefetching may sometimes do a better job, especially in connection
1731 with reuse analysis. */
1732 if (flag_speculative_prefetching
)
1734 flag_profile_values
= 1;
1735 flag_prefetch_loop_arrays
= 0;
1738 /* Warn about options that are not supported on this machine. */
1739 #ifndef INSN_SCHEDULING
1740 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1741 warning ("instruction scheduling not supported on this target machine");
1744 if (flag_delayed_branch
)
1745 warning ("this target machine does not have delayed branches");
1748 if (flag_tree_based_profiling
&& flag_profile_values
)
1749 sorry ("value-based profiling not yet implemented in trees.");
1751 user_label_prefix
= USER_LABEL_PREFIX
;
1752 if (flag_leading_underscore
!= -1)
1754 /* If the default prefix is more complicated than "" or "_",
1755 issue a warning and ignore this option. */
1756 if (user_label_prefix
[0] == 0 ||
1757 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1759 user_label_prefix
= flag_leading_underscore
? "_" : "";
1762 warning ("-f%sleading-underscore not supported on this target machine",
1763 flag_leading_underscore
? "" : "no-");
1766 /* If we are in verbose mode, write out the version and maybe all the
1767 option flags in use. */
1770 print_version (stderr
, "");
1772 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
1775 if (flag_syntax_only
)
1777 write_symbols
= NO_DEBUG
;
1781 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1783 if (debug_info_level
== DINFO_LEVEL_NONE
)
1784 write_symbols
= NO_DEBUG
;
1786 /* Now we know write_symbols, set up the debug hooks based on it.
1787 By default we do nothing for debug output. */
1788 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1789 default_debug_hooks
= &do_nothing_debug_hooks
;
1790 #if defined(DBX_DEBUGGING_INFO)
1791 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1792 default_debug_hooks
= &dbx_debug_hooks
;
1794 #if defined(XCOFF_DEBUGGING_INFO)
1795 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1796 default_debug_hooks
= &xcoff_debug_hooks
;
1798 #ifdef SDB_DEBUGGING_INFO
1799 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1800 default_debug_hooks
= &sdb_debug_hooks
;
1802 #ifdef DWARF2_DEBUGGING_INFO
1803 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1804 default_debug_hooks
= &dwarf2_debug_hooks
;
1806 #ifdef VMS_DEBUGGING_INFO
1807 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1808 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1809 default_debug_hooks
= &vmsdbg_debug_hooks
;
1812 debug_hooks
= &do_nothing_debug_hooks
;
1813 if (write_symbols
== NO_DEBUG
)
1815 #if defined(DBX_DEBUGGING_INFO)
1816 else if (write_symbols
== DBX_DEBUG
)
1817 debug_hooks
= &dbx_debug_hooks
;
1819 #if defined(XCOFF_DEBUGGING_INFO)
1820 else if (write_symbols
== XCOFF_DEBUG
)
1821 debug_hooks
= &xcoff_debug_hooks
;
1823 #ifdef SDB_DEBUGGING_INFO
1824 else if (write_symbols
== SDB_DEBUG
)
1825 debug_hooks
= &sdb_debug_hooks
;
1827 #ifdef DWARF2_DEBUGGING_INFO
1828 else if (write_symbols
== DWARF2_DEBUG
)
1829 debug_hooks
= &dwarf2_debug_hooks
;
1831 #ifdef VMS_DEBUGGING_INFO
1832 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1833 debug_hooks
= &vmsdbg_debug_hooks
;
1836 error ("target system does not support the \"%s\" debug format",
1837 debug_type_names
[write_symbols
]);
1839 /* Now we know which debug output will be used so we can set
1840 flag_var_tracking, flag_rename_registers if the user has
1841 not specified them. */
1842 if (debug_info_level
< DINFO_LEVEL_NORMAL
1843 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1845 if (flag_var_tracking
== 1)
1847 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1848 warning ("variable tracking requested, but useless unless "
1849 "producing debug info");
1851 warning ("variable tracking requested, but not supported "
1852 "by this debug format");
1854 flag_var_tracking
= 0;
1857 if (flag_rename_registers
== AUTODETECT_FLAG_VAR_TRACKING
)
1858 flag_rename_registers
= default_debug_hooks
->var_location
1859 != do_nothing_debug_hooks
.var_location
;
1861 if (flag_var_tracking
== AUTODETECT_FLAG_VAR_TRACKING
)
1862 flag_var_tracking
= optimize
>= 1;
1864 /* If auxiliary info generation is desired, open the output file.
1865 This goes in the same directory as the source file--unlike
1866 all the other output files. */
1867 if (flag_gen_aux_info
)
1869 aux_info_file
= fopen (aux_info_file_name
, "w");
1870 if (aux_info_file
== 0)
1871 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1874 if (! targetm
.have_named_sections
)
1876 if (flag_function_sections
)
1878 warning ("-ffunction-sections not supported for this target");
1879 flag_function_sections
= 0;
1881 if (flag_data_sections
)
1883 warning ("-fdata-sections not supported for this target");
1884 flag_data_sections
= 0;
1888 if (flag_function_sections
&& profile_flag
)
1890 warning ("-ffunction-sections disabled; it makes profiling impossible");
1891 flag_function_sections
= 0;
1894 #ifndef HAVE_prefetch
1895 if (flag_prefetch_loop_arrays
)
1897 warning ("-fprefetch-loop-arrays not supported for this target");
1898 flag_prefetch_loop_arrays
= 0;
1900 if (flag_speculative_prefetching
)
1902 if (flag_speculative_prefetching_set
)
1903 warning ("-fspeculative-prefetching not supported for this target");
1904 flag_speculative_prefetching
= 0;
1907 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1909 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
1910 flag_prefetch_loop_arrays
= 0;
1912 if (flag_speculative_prefetching
&& !HAVE_prefetch
)
1914 if (flag_speculative_prefetching_set
)
1915 warning ("-fspeculative-prefetching not supported for this target (try -march switches)");
1916 flag_speculative_prefetching
= 0;
1920 /* This combination of options isn't handled for i386 targets and doesn't
1921 make much sense anyway, so don't allow it. */
1922 if (flag_prefetch_loop_arrays
&& optimize_size
)
1924 warning ("-fprefetch-loop-arrays is not supported with -Os");
1925 flag_prefetch_loop_arrays
= 0;
1928 #ifndef OBJECT_FORMAT_ELF
1929 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1930 warning ("-ffunction-sections may affect debugging on some targets");
1933 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1934 if (flag_signaling_nans
)
1935 flag_trapping_math
= 1;
1938 /* Initialize the compiler back end. */
1942 init_adjust_machine_modes ();
1944 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
1945 || debug_info_level
== DINFO_LEVEL_VERBOSE
1946 #ifdef VMS_DEBUGGING_INFO
1947 /* Enable line number info for traceback. */
1948 || debug_info_level
> DINFO_LEVEL_NONE
1950 || flag_test_coverage
);
1953 init_fake_stack_mems ();
1957 init_function_once ();
1958 init_varasm_once ();
1960 /* The following initialization functions need to generate rtl, so
1961 provide a dummy function context for them. */
1962 init_dummy_function_start ();
1964 if (flag_caller_saves
)
1965 init_caller_save ();
1966 expand_dummy_function_end ();
1969 /* Language-dependent initialization. Returns nonzero on success. */
1971 lang_dependent_init (const char *name
)
1973 location_t save_loc
= input_location
;
1974 if (dump_base_name
== 0)
1975 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1977 /* Other front-end initialization. */
1978 #ifdef USE_MAPPED_LOCATION
1979 input_location
= BUILTINS_LOCATION
;
1981 input_filename
= "<built-in>";
1984 if (lang_hooks
.init () == 0)
1986 input_location
= save_loc
;
1988 init_asm_output (name
);
1990 /* These create various _DECL nodes, so need to be called after the
1991 front end is initialized. */
1995 /* The following initialization functions need to generate rtl, so
1996 provide a dummy function context for them. */
1997 init_dummy_function_start ();
1999 expand_dummy_function_end ();
2001 /* If dbx symbol table desired, initialize writing it and output the
2002 predefined types. */
2003 timevar_push (TV_SYMOUT
);
2005 #ifdef DWARF2_UNWIND_INFO
2006 if (dwarf2out_do_frame ())
2007 dwarf2out_frame_init ();
2010 /* Now we have the correct original filename, we can initialize
2012 (*debug_hooks
->init
) (name
);
2014 timevar_pop (TV_SYMOUT
);
2019 /* Clean up: close opened files, etc. */
2024 /* Close the dump files. */
2025 if (flag_gen_aux_info
)
2027 fclose (aux_info_file
);
2029 unlink (aux_info_file_name
);
2032 /* Close non-debugging input and output files. Take special care to note
2033 whether fclose returns an error, since the pages might still be on the
2034 buffer chain while the file is open. */
2038 if (ferror (asm_out_file
) != 0)
2039 fatal_error ("error writing to %s: %m", asm_file_name
);
2040 if (fclose (asm_out_file
) != 0)
2041 fatal_error ("error closing %s: %m", asm_file_name
);
2044 finish_optimization_passes ();
2048 ggc_print_statistics ();
2049 stringpool_statistics ();
2050 dump_tree_statistics ();
2051 dump_rtx_statistics ();
2052 dump_varray_statistics ();
2053 dump_alloc_pool_statistics ();
2054 dump_ggc_loc_statistics ();
2057 /* Free up memory for the benefit of leak detectors. */
2060 /* Language-specific end of compilation actions. */
2061 lang_hooks
.finish ();
2064 /* Initialize the compiler, and compile the input file. */
2068 /* Initialize timing first. The C front ends read the main file in
2069 the post_options hook, and C++ does file timings. */
2070 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2072 timevar_start (TV_TOTAL
);
2076 /* Don't do any more if an error has already occurred. */
2079 /* Set up the back-end if requested. */
2083 /* Language-dependent initialization. Returns true on success. */
2084 if (lang_dependent_init (main_input_filename
))
2090 /* Stop timing and print the times. */
2091 timevar_stop (TV_TOTAL
);
2092 timevar_print (stderr
);
2095 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2096 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2097 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2099 It is not safe to call this function more than once. */
2102 toplev_main (unsigned int argc
, const char **argv
)
2106 /* Initialization of GCC's environment, and diagnostics. */
2107 general_init (argv
[0]);
2109 /* Parse the options and do minimal processing; basically just
2110 enough to default flags appropriately. */
2111 decode_options (argc
, argv
);
2115 /* Exit early if we can (e.g. -help). */
2116 if (!exit_after_options
)
2119 if (errorcount
|| sorrycount
)
2120 return (FATAL_EXIT_CODE
);
2122 return (SUCCESS_EXIT_CODE
);