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) \
371 { OPTION, DEFAULT, HELP },
372 #include "params.def"
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.
542 This should be used via the floor_log2 macro. */
545 floor_log2_wide (unsigned HOST_WIDE_INT x
)
550 if (sizeof (HOST_WIDE_INT
) * 8 > 64)
551 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
553 if (sizeof (HOST_WIDE_INT
) * 8 > 32)
554 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
556 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
558 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
560 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
562 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
564 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
569 /* Return the logarithm of X, base 2, considering X unsigned,
570 if X is a power of 2. Otherwise, returns -1.
572 This should be used via the `exact_log2' macro. */
575 exact_log2_wide (unsigned HOST_WIDE_INT x
)
577 /* Test for 0 or a power of 2. */
578 if (x
== 0 || x
!= (x
& -x
))
580 return floor_log2_wide (x
);
583 /* Handler for fatal signals, such as SIGSEGV. These are transformed
584 into ICE messages, which is much more user friendly. In case the
585 error printer crashes, reset the signal to prevent infinite recursion. */
588 crash_signal (int signo
)
590 signal (signo
, SIG_DFL
);
592 /* If we crashed while processing an ASM statement, then be a little more
593 graceful. It's most likely the user's fault. */
594 if (this_is_asm_operands
)
596 output_operand_lossage ("unrecoverable error");
597 exit (FATAL_EXIT_CODE
);
600 internal_error ("%s", strsignal (signo
));
603 /* Arrange to dump core on error. (The regular error message is still
604 printed first, except in the case of abort().) */
607 setup_core_dumping (void)
610 signal (SIGABRT
, SIG_DFL
);
612 #if defined(HAVE_SETRLIMIT)
615 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
616 fatal_error ("getting core file size maximum limit: %m");
617 rlim
.rlim_cur
= rlim
.rlim_max
;
618 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
619 fatal_error ("setting core file size limit to maximum: %m");
622 diagnostic_abort_on_error (global_dc
);
626 /* Strip off a legitimate source ending from the input string NAME of
627 length LEN. Rather than having to know the names used by all of
628 our front ends, we strip off an ending of a period followed by
629 up to five characters. (Java uses ".class".) */
632 strip_off_ending (char *name
, int len
)
635 for (i
= 2; i
< 6 && len
> i
; i
++)
637 if (name
[len
- i
] == '.')
639 name
[len
- i
] = '\0';
645 /* Output a quoted string. */
648 output_quoted_string (FILE *asm_file
, const char *string
)
650 #ifdef OUTPUT_QUOTED_STRING
651 OUTPUT_QUOTED_STRING (asm_file
, string
);
655 putc ('\"', asm_file
);
656 while ((c
= *string
++) != 0)
660 if (c
== '\"' || c
== '\\')
661 putc ('\\', asm_file
);
665 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
667 putc ('\"', asm_file
);
671 /* Output a file name in the form wanted by System V. */
674 output_file_directive (FILE *asm_file
, const char *input_name
)
679 if (input_name
== NULL
)
680 input_name
= "<stdin>";
682 len
= strlen (input_name
);
683 na
= input_name
+ len
;
685 /* NA gets INPUT_NAME sans directory names. */
686 while (na
> input_name
)
688 if (IS_DIR_SEPARATOR (na
[-1]))
693 #ifdef ASM_OUTPUT_SOURCE_FILENAME
694 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
696 fprintf (asm_file
, "\t.file\t");
697 output_quoted_string (asm_file
, na
);
698 fputc ('\n', asm_file
);
702 /* Do any final processing required for the declarations in VEC, of
703 which there are LEN. We write out inline functions and variables
704 that have been deferred until this point, but which are required.
705 Returns nonzero if anything was put out. */
708 wrapup_global_declarations (tree
*vec
, int len
)
713 int output_something
= 0;
715 for (i
= 0; i
< len
; i
++)
719 /* We're not deferring this any longer. Assignment is
720 conditional to avoid needlessly dirtying PCH pages. */
721 if (DECL_DEFER_OUTPUT (decl
) != 0)
722 DECL_DEFER_OUTPUT (decl
) = 0;
724 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
725 lang_hooks
.finish_incomplete_decl (decl
);
728 /* Now emit any global variables or functions that we have been
729 putting off. We need to loop in case one of the things emitted
730 here references another one which comes earlier in the list. */
734 for (i
= 0; i
< len
; i
++)
738 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
741 /* Don't write out static consts, unless we still need them.
743 We also keep static consts if not optimizing (for debugging),
744 unless the user specified -fno-keep-static-consts.
745 ??? They might be better written into the debug information.
746 This is possible when using DWARF.
748 A language processor that wants static constants to be always
749 written out (even if it is not used) is responsible for
750 calling rest_of_decl_compilation itself. E.g. the C front-end
751 calls rest_of_decl_compilation from finish_decl.
752 One motivation for this is that is conventional in some
753 environments to write things like:
754 static const char rcsid[] = "... version string ...";
755 intending to force the string to be in the executable.
757 A language processor that would prefer to have unneeded
758 static constants "optimized away" would just defer writing
759 them out until here. E.g. C++ does this, because static
760 constants are often defined in header files.
762 ??? A tempting alternative (for both C and C++) would be
763 to force a constant to be written if and only if it is
764 defined in a main file, as opposed to an include file. */
766 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
768 struct cgraph_varpool_node
*node
;
770 node
= cgraph_varpool_node (decl
);
772 if (flag_unit_at_a_time
&& node
->finalized
)
774 else if ((flag_unit_at_a_time
&& !cgraph_global_info_ready
)
776 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
778 else if (node
->needed
)
780 else if (DECL_COMDAT (decl
))
782 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
783 && (optimize
|| !flag_keep_static_consts
784 || DECL_ARTIFICIAL (decl
)))
790 rest_of_decl_compilation (decl
, 1, 1);
796 output_something
= 1;
800 return output_something
;
803 /* Issue appropriate warnings for the global declarations in VEC (of
804 which there are LEN). Output debugging information for them. */
807 check_global_declarations (tree
*vec
, int len
)
812 for (i
= 0; i
< len
; i
++)
816 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
817 && ! TREE_ASM_WRITTEN (decl
))
818 /* Cancel the RTL for this decl so that, if debugging info
819 output for global variables is still to come,
820 this one will be omitted. */
821 SET_DECL_RTL (decl
, NULL_RTX
);
823 /* Warn about any function
824 declared static but not defined.
825 We don't warn about variables,
826 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 ("%J%qF used but never defined", decl
, decl
);
840 warning ("%J%qF declared %<static%> but never defined",
842 /* This symbol is effectively an "extern" declaration now. */
843 TREE_PUBLIC (decl
) = 1;
844 assemble_external (decl
);
847 /* Warn about static fns or vars defined but not used. */
848 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
849 /* We don't warn about "static const" variables because the
850 "rcs_id" idiom uses that construction. */
851 || (warn_unused_variable
852 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
853 && ! DECL_IN_SYSTEM_HEADER (decl
)
854 && ! TREE_USED (decl
)
855 /* The TREE_USED bit for file-scope decls is kept in the identifier,
856 to handle multiple external decls in different scopes. */
857 && ! TREE_USED (DECL_NAME (decl
))
858 && ! DECL_EXTERNAL (decl
)
859 && ! TREE_PUBLIC (decl
)
860 /* A volatile variable might be used in some non-obvious way. */
861 && ! TREE_THIS_VOLATILE (decl
)
862 /* Global register variables must be declared to reserve them. */
863 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
864 /* Otherwise, ask the language. */
865 && lang_hooks
.decls
.warn_unused_global (decl
))
866 warning ("%J%qD defined but not used", decl
, decl
);
868 /* Avoid confusing the debug information machinery when there are
870 if (errorcount
== 0 && sorrycount
== 0)
872 timevar_push (TV_SYMOUT
);
873 (*debug_hooks
->global_decl
) (decl
);
874 timevar_pop (TV_SYMOUT
);
879 /* Warn about a use of an identifier which was marked deprecated. */
881 warn_deprecated_use (tree node
)
883 if (node
== 0 || !warn_deprecated_decl
)
888 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
889 warning ("%qs is deprecated (declared at %s:%d)",
890 IDENTIFIER_POINTER (DECL_NAME (node
)),
891 xloc
.file
, xloc
.line
);
893 else if (TYPE_P (node
))
895 const char *what
= NULL
;
896 tree decl
= TYPE_STUB_DECL (node
);
898 if (TYPE_NAME (node
))
900 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
901 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
902 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
903 && DECL_NAME (TYPE_NAME (node
)))
904 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
909 expanded_location xloc
910 = expand_location (DECL_SOURCE_LOCATION (decl
));
912 warning ("%qs is deprecated (declared at %s:%d)", what
,
913 xloc
.file
, xloc
.line
);
915 warning ("type is deprecated (declared at %s:%d)",
916 xloc
.file
, xloc
.line
);
921 warning ("%qs is deprecated", what
);
923 warning ("type is deprecated");
928 /* Save the current INPUT_LOCATION on the top entry in the
929 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
930 INPUT_LOCATION accordingly. */
933 #ifdef USE_MAPPED_LOCATION
934 push_srcloc (location_t fline
)
936 push_srcloc (const char *file
, int line
)
939 struct file_stack
*fs
;
941 fs
= xmalloc (sizeof (struct file_stack
));
942 fs
->location
= input_location
;
943 fs
->next
= input_file_stack
;
944 #ifdef USE_MAPPED_LOCATION
945 input_location
= fline
;
947 input_filename
= file
;
950 input_file_stack
= fs
;
951 input_file_stack_tick
++;
954 /* Pop the top entry off the stack of presently open source files.
955 Restore the INPUT_LOCATION from the new topmost entry on the
961 struct file_stack
*fs
;
963 fs
= input_file_stack
;
964 input_location
= fs
->location
;
965 input_file_stack
= fs
->next
;
967 input_file_stack_tick
++;
970 /* Compile an entire translation unit. Write a file of assembly
971 output and various debugging dumps. */
976 /* Initialize yet another pass. */
979 init_final (main_input_filename
);
980 coverage_init (aux_base_name
);
982 timevar_push (TV_PARSE
);
984 /* Call the parser, which parses the entire file (calling
985 rest_of_compilation for each function). */
986 lang_hooks
.parse_file (set_yydebug
);
988 /* In case there were missing block closers,
989 get us back to the global binding level. */
990 lang_hooks
.clear_binding_stack ();
992 /* Compilation is now finished except for writing
993 what's left of the symbol table output. */
994 timevar_pop (TV_PARSE
);
996 if (flag_syntax_only
)
999 lang_hooks
.decls
.final_write_globals ();
1001 cgraph_varpool_assemble_pending_decls ();
1003 /* This must occur after the loop to output deferred functions.
1004 Else the coverage initializer would not be emitted if all the
1005 functions in this compilation unit were deferred. */
1008 /* Likewise for mudflap static object registrations. */
1010 mudflap_finish_file ();
1012 /* Write out any pending weak symbol declarations. */
1016 /* Do dbx symbols. */
1017 timevar_push (TV_SYMOUT
);
1019 #ifdef DWARF2_UNWIND_INFO
1020 if (dwarf2out_do_frame ())
1021 dwarf2out_frame_finish ();
1024 (*debug_hooks
->finish
) (main_input_filename
);
1025 timevar_pop (TV_SYMOUT
);
1027 /* Output some stuff at end of file if nec. */
1029 dw2_output_indirect_constants ();
1031 /* Attach a special .ident directive to the end of the file to identify
1032 the version of GCC which compiled this code. The format of the .ident
1033 string is patterned after the ones produced by native SVR4 compilers. */
1036 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
1037 IDENT_ASM_OP
, version_string
);
1040 /* This must be at the end. Some target ports emit end of file directives
1041 into the assembly file here, and hence we can not output anything to the
1042 assembly file after this point. */
1043 targetm
.asm_out
.file_end ();
1046 /* Display help for target options. */
1048 display_target_options (void)
1051 static bool displayed
= false;
1053 /* Avoid double printing for --help --target-help. */
1059 if (ARRAY_SIZE (target_switches
) > 1
1060 #ifdef TARGET_OPTIONS
1061 || ARRAY_SIZE (target_options
) > 1
1069 printf (_("\nTarget specific options:\n"));
1071 for (i
= ARRAY_SIZE (target_switches
); i
--;)
1073 const char *option
= target_switches
[i
].name
;
1074 const char *description
= target_switches
[i
].description
;
1076 if (option
== NULL
|| *option
== 0)
1078 else if (description
== NULL
)
1083 printf (_(" -m%-23s [undocumented]\n"), option
);
1085 else if (*description
!= 0)
1086 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1089 #ifdef TARGET_OPTIONS
1090 for (i
= ARRAY_SIZE (target_options
); i
--;)
1092 const char *option
= target_options
[i
].prefix
;
1093 const char *description
= target_options
[i
].description
;
1095 if (option
== NULL
|| *option
== 0)
1097 else if (description
== NULL
)
1102 printf (_(" -m%-23s [undocumented]\n"), option
);
1104 else if (*description
!= 0)
1105 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1111 printf (_("\nThere are undocumented target specific options as well.\n"));
1113 printf (_(" They exist, but they are not documented.\n"));
1118 /* Parse a -d... command line switch. */
1121 decode_d_option (const char *arg
)
1132 flag_print_asm_name
= 1;
1135 flag_dump_rtl_in_asm
= 1;
1136 flag_print_asm_name
= 1;
1139 graph_dump_format
= vcg
;
1142 rtl_dump_and_exit
= 1;
1147 case 'D': /* These are handled by the preprocessor. */
1151 setup_core_dumping();
1156 if (!enable_rtl_dump_file (c
))
1157 warning ("unrecognized gcc debugging option: %c", c
);
1162 /* Indexed by enum debug_info_type. */
1163 const char *const debug_type_names
[] =
1165 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1168 /* Decode -m switches. */
1169 /* Decode the switch -mNAME. */
1172 set_target_switch (const char *name
)
1175 int valid_target_option
= 0;
1177 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1178 if (!strcmp (target_switches
[j
].name
, name
))
1180 if (target_switches
[j
].value
< 0)
1181 target_flags
&= ~-target_switches
[j
].value
;
1183 target_flags
|= target_switches
[j
].value
;
1186 if (target_switches
[j
].value
< 0)
1187 target_flags_explicit
|= -target_switches
[j
].value
;
1189 target_flags_explicit
|= target_switches
[j
].value
;
1191 valid_target_option
= 1;
1194 #ifdef TARGET_OPTIONS
1195 if (!valid_target_option
)
1196 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1198 int len
= strlen (target_options
[j
].prefix
);
1199 if (target_options
[j
].value
)
1201 if (!strcmp (target_options
[j
].prefix
, name
))
1203 *target_options
[j
].variable
= target_options
[j
].value
;
1204 valid_target_option
= 1;
1209 if (!strncmp (target_options
[j
].prefix
, name
, len
))
1211 *target_options
[j
].variable
= name
+ len
;
1212 valid_target_option
= 1;
1218 if (!valid_target_option
)
1219 error ("invalid option %qs", name
);
1222 /* Print version information to FILE.
1223 Each line begins with INDENT (for the case where FILE is the
1224 assembler output file). */
1227 print_version (FILE *file
, const char *indent
)
1230 #define __VERSION__ "[?]"
1234 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1236 "%s%s%s version %s (%s) compiled by CC.\n"
1238 , indent
, *indent
!= 0 ? " " : "",
1239 lang_hooks
.name
, version_string
, TARGET_NAME
,
1240 indent
, __VERSION__
);
1241 fnotice (file
, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1242 indent
, *indent
!= 0 ? " " : "",
1243 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1246 /* Print an option value and return the adjusted position in the line.
1247 ??? We don't handle error returns from fprintf (disk full); presumably
1248 other code will catch a disk full though. */
1251 print_single_switch (FILE *file
, int pos
, int max
,
1252 const char *indent
, const char *sep
, const char *term
,
1253 const char *type
, const char *name
)
1255 /* The ultrix fprintf returns 0 on success, so compute the result we want
1256 here since we need it for the following test. */
1257 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
1262 fprintf (file
, "%s", term
);
1267 fprintf (file
, "%s", indent
);
1268 pos
= strlen (indent
);
1270 fprintf (file
, "%s%s%s", sep
, type
, name
);
1275 /* Print active target switches to FILE.
1276 POS is the current cursor position and MAX is the size of a "line".
1277 Each line begins with INDENT and ends with TERM.
1278 Each switch is separated from the next by SEP. */
1281 print_switch_values (FILE *file
, int pos
, int max
,
1282 const char *indent
, const char *sep
, const char *term
)
1287 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1288 that it can be printed below. This helps reproducibility. */
1291 /* Print the options as passed. */
1292 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
1293 _("options passed: "), "");
1295 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1299 if (strcmp (*p
, "-o") == 0)
1305 if (strcmp (*p
, "-quiet") == 0)
1307 if (strcmp (*p
, "-version") == 0)
1312 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
1315 fprintf (file
, "%s", term
);
1317 /* Print the -f and -m options that have been enabled.
1318 We don't handle language specific options but printing argv
1321 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
1322 _("options enabled: "), "");
1324 for (j
= 0; j
< cl_options_count
; j
++)
1326 if (!cl_options
[j
].flag_var
1327 || !(cl_options
[j
].flags
& CL_REPORT
))
1330 if (cl_options
[j
].has_set_value
)
1332 if (*cl_options
[j
].flag_var
!= cl_options
[j
].set_value
)
1337 if (!*cl_options
[j
].flag_var
)
1341 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1342 "", cl_options
[j
].opt_text
);
1345 /* Print target specific options. */
1347 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1348 if (target_switches
[j
].name
[0] != '\0'
1349 && target_switches
[j
].value
> 0
1350 && ((target_switches
[j
].value
& target_flags
)
1351 == target_switches
[j
].value
))
1353 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1354 "-m", target_switches
[j
].name
);
1357 #ifdef TARGET_OPTIONS
1358 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1359 if (*target_options
[j
].variable
!= NULL
)
1362 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
1363 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1364 prefix
, *target_options
[j
].variable
);
1368 fprintf (file
, "%s", term
);
1371 /* Open assembly code output file. Do this even if -fsyntax-only is
1372 on, because then the driver will have provided the name of a
1373 temporary file or bit bucket for us. NAME is the file specified on
1374 the command line, possibly NULL. */
1376 init_asm_output (const char *name
)
1378 if (name
== NULL
&& asm_file_name
== 0)
1379 asm_out_file
= stdout
;
1382 if (asm_file_name
== 0)
1384 int len
= strlen (dump_base_name
);
1385 char *dumpname
= xmalloc (len
+ 6);
1386 memcpy (dumpname
, dump_base_name
, len
+ 1);
1387 strip_off_ending (dumpname
, len
);
1388 strcat (dumpname
, ".s");
1389 asm_file_name
= dumpname
;
1391 if (!strcmp (asm_file_name
, "-"))
1392 asm_out_file
= stdout
;
1394 asm_out_file
= fopen (asm_file_name
, "w+b");
1395 if (asm_out_file
== 0)
1396 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1399 #ifdef IO_BUFFER_SIZE
1400 setvbuf (asm_out_file
, xmalloc (IO_BUFFER_SIZE
),
1401 _IOFBF
, IO_BUFFER_SIZE
);
1404 if (!flag_syntax_only
)
1406 targetm
.asm_out
.file_start ();
1408 #ifdef ASM_COMMENT_START
1409 if (flag_verbose_asm
)
1411 /* Print the list of options in effect. */
1412 print_version (asm_out_file
, ASM_COMMENT_START
);
1413 print_switch_values (asm_out_file
, 0, MAX_LINE
,
1414 ASM_COMMENT_START
, " ", "\n");
1415 /* Add a blank line here so it appears in assembler output but not
1417 fprintf (asm_out_file
, "\n");
1423 /* Default version of get_pch_validity.
1424 By default, every flag difference is fatal; that will be mostly right for
1425 most targets, but completely right for very few. */
1428 default_get_pch_validity (size_t *len
)
1430 #ifdef TARGET_OPTIONS
1435 *len
= sizeof (target_flags
) + 2;
1436 #ifdef TARGET_OPTIONS
1437 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1440 if (*target_options
[i
].variable
)
1441 *len
+= strlen (*target_options
[i
].variable
);
1445 result
= r
= xmalloc (*len
);
1449 memcpy (r
, &target_flags
, sizeof (target_flags
));
1450 r
+= sizeof (target_flags
);
1452 #ifdef TARGET_OPTIONS
1453 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1455 const char *str
= *target_options
[i
].variable
;
1459 l
= strlen (str
) + 1;
1468 /* Default version of pch_valid_p. */
1471 default_pch_valid_p (const void *data_p
, size_t len
)
1473 const char *data
= (const char *)data_p
;
1474 const char *flag_that_differs
= NULL
;
1477 /* -fpic and -fpie also usually make a PCH invalid. */
1478 if (data
[0] != flag_pic
)
1479 return _("created and used with different settings of -fpic");
1480 if (data
[1] != flag_pie
)
1481 return _("created and used with different settings of -fpie");
1484 /* Check target_flags. */
1485 if (memcmp (data
, &target_flags
, sizeof (target_flags
)) != 0)
1487 for (i
= 0; i
< ARRAY_SIZE (target_switches
); i
++)
1492 memcpy (&tf
, data
, sizeof (target_flags
));
1494 bits
= target_switches
[i
].value
;
1497 if ((target_flags
& bits
) != (tf
& bits
))
1499 flag_that_differs
= target_switches
[i
].name
;
1505 data
+= sizeof (target_flags
);
1506 len
-= sizeof (target_flags
);
1508 /* Check string options. */
1509 #ifdef TARGET_OPTIONS
1510 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1512 const char *str
= *target_options
[i
].variable
;
1516 l
= strlen (str
) + 1;
1517 if (len
< l
|| memcmp (data
, str
, l
) != 0)
1519 flag_that_differs
= target_options
[i
].prefix
;
1532 asprintf (&r
, _("created and used with differing settings of '-m%s'"),
1535 return _("out of memory");
1540 /* Default tree printer. Handles declarations only. */
1542 default_tree_printer (pretty_printer
* pp
, text_info
*text
)
1544 switch (*text
->format_spec
)
1550 tree t
= va_arg (*text
->args_ptr
, tree
);
1551 const char *n
= DECL_NAME (t
)
1552 ? lang_hooks
.decl_printable_name (t
, 2)
1563 /* Initialization of the front end environment, before command line
1564 options are parsed. Signal handlers, internationalization etc.
1565 ARGV0 is main's argv[0]. */
1567 general_init (const char *argv0
)
1571 p
= argv0
+ strlen (argv0
);
1572 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1576 xmalloc_set_program_name (progname
);
1580 gcc_init_libintl ();
1582 /* Initialize the diagnostics reporting machinery, so option parsing
1583 can give warnings and errors. */
1584 diagnostic_initialize (global_dc
);
1585 /* Set a default printer. Language specific initializations will
1586 override it later. */
1587 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1589 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1591 signal (SIGSEGV
, crash_signal
);
1594 signal (SIGILL
, crash_signal
);
1597 signal (SIGBUS
, crash_signal
);
1600 signal (SIGABRT
, crash_signal
);
1602 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1603 signal (SIGIOT
, crash_signal
);
1606 signal (SIGFPE
, crash_signal
);
1609 /* Other host-specific signal setup. */
1610 (*host_hooks
.extra_signals
)();
1612 /* Initialize the garbage-collector, string pools and tree type hash
1616 linemap_init (&line_table
);
1619 /* Initialize register usage now so switches may override. */
1622 /* Register the language-independent parameters. */
1623 add_params (lang_independent_params
, LAST_PARAM
);
1625 /* This must be done after add_params but before argument processing. */
1626 init_ggc_heuristics();
1627 init_tree_optimization_passes ();
1630 /* Process the options that have been parsed. */
1632 process_options (void)
1634 /* Allow the front end to perform consistency checks and do further
1635 initialization based on the command line options. This hook also
1636 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1637 so we can correctly initialize debug output. */
1638 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1639 #ifndef USE_MAPPED_LOCATION
1640 input_filename
= main_input_filename
;
1643 #ifdef OVERRIDE_OPTIONS
1644 /* Some machines may reject certain combinations of options. */
1648 if (flag_short_enums
== 2)
1649 flag_short_enums
= targetm
.default_short_enums ();
1651 /* Set aux_base_name if not already set. */
1654 else if (main_input_filename
)
1656 char *name
= xstrdup (lbasename (main_input_filename
));
1658 strip_off_ending (name
, strlen (name
));
1659 aux_base_name
= name
;
1662 aux_base_name
= "gccaux";
1664 /* Set up the align_*_log variables, defaulting them to 1 if they
1665 were still unset. */
1666 if (align_loops
<= 0) align_loops
= 1;
1667 if (align_loops_max_skip
> align_loops
|| !align_loops
)
1668 align_loops_max_skip
= align_loops
- 1;
1669 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1670 if (align_jumps
<= 0) align_jumps
= 1;
1671 if (align_jumps_max_skip
> align_jumps
|| !align_jumps
)
1672 align_jumps_max_skip
= align_jumps
- 1;
1673 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1674 if (align_labels
<= 0) align_labels
= 1;
1675 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1676 if (align_labels_max_skip
> align_labels
|| !align_labels
)
1677 align_labels_max_skip
= align_labels
- 1;
1678 if (align_functions
<= 0) align_functions
= 1;
1679 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1681 /* Unrolling all loops implies that standard loop unrolling must also
1683 if (flag_unroll_all_loops
)
1684 flag_unroll_loops
= 1;
1686 /* The loop unrolling code assumes that cse will be run after loop. */
1687 if (flag_unroll_loops
|| flag_peel_loops
)
1688 flag_rerun_cse_after_loop
= 1;
1690 /* If explicitly asked to run new loop optimizer, switch off the old
1692 if (flag_loop_optimize2
)
1693 flag_loop_optimize
= 0;
1695 /* Enable new loop optimizer pass if any of its optimizations is called. */
1696 if (flag_move_loop_invariants
1697 || flag_unswitch_loops
1699 || flag_unroll_loops
1700 || flag_branch_on_count_reg
)
1701 flag_loop_optimize2
= 1;
1703 if (flag_non_call_exceptions
)
1704 flag_asynchronous_unwind_tables
= 1;
1705 if (flag_asynchronous_unwind_tables
)
1706 flag_unwind_tables
= 1;
1708 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1710 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
1711 flag_unit_at_a_time
= 0;
1713 if (flag_value_profile_transformations
)
1714 flag_profile_values
= 1;
1716 /* Speculative prefetching implies the value profiling. We also switch off
1717 the prefetching in the loop optimizer, so that we do not emit double
1718 prefetches. TODO -- we should teach these two to cooperate; the loop
1719 based prefetching may sometimes do a better job, especially in connection
1720 with reuse analysis. */
1721 if (flag_speculative_prefetching
)
1723 flag_profile_values
= 1;
1724 flag_prefetch_loop_arrays
= 0;
1727 /* Warn about options that are not supported on this machine. */
1728 #ifndef INSN_SCHEDULING
1729 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1730 warning ("instruction scheduling not supported on this target machine");
1733 if (flag_delayed_branch
)
1734 warning ("this target machine does not have delayed branches");
1737 if (flag_tree_based_profiling
&& flag_profile_values
)
1738 sorry ("value-based profiling not yet implemented in trees.");
1740 user_label_prefix
= USER_LABEL_PREFIX
;
1741 if (flag_leading_underscore
!= -1)
1743 /* If the default prefix is more complicated than "" or "_",
1744 issue a warning and ignore this option. */
1745 if (user_label_prefix
[0] == 0 ||
1746 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1748 user_label_prefix
= flag_leading_underscore
? "_" : "";
1751 warning ("-f%sleading-underscore not supported on this target machine",
1752 flag_leading_underscore
? "" : "no-");
1755 /* If we are in verbose mode, write out the version and maybe all the
1756 option flags in use. */
1759 print_version (stderr
, "");
1761 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
1764 if (flag_syntax_only
)
1766 write_symbols
= NO_DEBUG
;
1770 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1772 if (debug_info_level
== DINFO_LEVEL_NONE
)
1773 write_symbols
= NO_DEBUG
;
1775 /* Now we know write_symbols, set up the debug hooks based on it.
1776 By default we do nothing for debug output. */
1777 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1778 default_debug_hooks
= &do_nothing_debug_hooks
;
1779 #if defined(DBX_DEBUGGING_INFO)
1780 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1781 default_debug_hooks
= &dbx_debug_hooks
;
1783 #if defined(XCOFF_DEBUGGING_INFO)
1784 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1785 default_debug_hooks
= &xcoff_debug_hooks
;
1787 #ifdef SDB_DEBUGGING_INFO
1788 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1789 default_debug_hooks
= &sdb_debug_hooks
;
1791 #ifdef DWARF2_DEBUGGING_INFO
1792 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1793 default_debug_hooks
= &dwarf2_debug_hooks
;
1795 #ifdef VMS_DEBUGGING_INFO
1796 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1797 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1798 default_debug_hooks
= &vmsdbg_debug_hooks
;
1801 debug_hooks
= &do_nothing_debug_hooks
;
1802 if (write_symbols
== NO_DEBUG
)
1804 #if defined(DBX_DEBUGGING_INFO)
1805 else if (write_symbols
== DBX_DEBUG
)
1806 debug_hooks
= &dbx_debug_hooks
;
1808 #if defined(XCOFF_DEBUGGING_INFO)
1809 else if (write_symbols
== XCOFF_DEBUG
)
1810 debug_hooks
= &xcoff_debug_hooks
;
1812 #ifdef SDB_DEBUGGING_INFO
1813 else if (write_symbols
== SDB_DEBUG
)
1814 debug_hooks
= &sdb_debug_hooks
;
1816 #ifdef DWARF2_DEBUGGING_INFO
1817 else if (write_symbols
== DWARF2_DEBUG
)
1818 debug_hooks
= &dwarf2_debug_hooks
;
1820 #ifdef VMS_DEBUGGING_INFO
1821 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1822 debug_hooks
= &vmsdbg_debug_hooks
;
1825 error ("target system does not support the \"%s\" debug format",
1826 debug_type_names
[write_symbols
]);
1828 /* Now we know which debug output will be used so we can set
1829 flag_var_tracking, flag_rename_registers if the user has
1830 not specified them. */
1831 if (debug_info_level
< DINFO_LEVEL_NORMAL
1832 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1834 if (flag_var_tracking
== 1)
1836 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1837 warning ("variable tracking requested, but useless unless "
1838 "producing debug info");
1840 warning ("variable tracking requested, but not supported "
1841 "by this debug format");
1843 flag_var_tracking
= 0;
1846 if (flag_rename_registers
== AUTODETECT_FLAG_VAR_TRACKING
)
1847 flag_rename_registers
= default_debug_hooks
->var_location
1848 != do_nothing_debug_hooks
.var_location
;
1850 if (flag_var_tracking
== AUTODETECT_FLAG_VAR_TRACKING
)
1851 flag_var_tracking
= optimize
>= 1;
1853 /* If auxiliary info generation is desired, open the output file.
1854 This goes in the same directory as the source file--unlike
1855 all the other output files. */
1856 if (flag_gen_aux_info
)
1858 aux_info_file
= fopen (aux_info_file_name
, "w");
1859 if (aux_info_file
== 0)
1860 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1863 if (! targetm
.have_named_sections
)
1865 if (flag_function_sections
)
1867 warning ("-ffunction-sections not supported for this target");
1868 flag_function_sections
= 0;
1870 if (flag_data_sections
)
1872 warning ("-fdata-sections not supported for this target");
1873 flag_data_sections
= 0;
1877 if (flag_function_sections
&& profile_flag
)
1879 warning ("-ffunction-sections disabled; it makes profiling impossible");
1880 flag_function_sections
= 0;
1883 #ifndef HAVE_prefetch
1884 if (flag_prefetch_loop_arrays
)
1886 warning ("-fprefetch-loop-arrays not supported for this target");
1887 flag_prefetch_loop_arrays
= 0;
1889 if (flag_speculative_prefetching
)
1891 if (flag_speculative_prefetching_set
)
1892 warning ("-fspeculative-prefetching not supported for this target");
1893 flag_speculative_prefetching
= 0;
1896 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1898 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
1899 flag_prefetch_loop_arrays
= 0;
1901 if (flag_speculative_prefetching
&& !HAVE_prefetch
)
1903 if (flag_speculative_prefetching_set
)
1904 warning ("-fspeculative-prefetching not supported for this target (try -march switches)");
1905 flag_speculative_prefetching
= 0;
1909 /* This combination of options isn't handled for i386 targets and doesn't
1910 make much sense anyway, so don't allow it. */
1911 if (flag_prefetch_loop_arrays
&& optimize_size
)
1913 warning ("-fprefetch-loop-arrays is not supported with -Os");
1914 flag_prefetch_loop_arrays
= 0;
1917 #ifndef OBJECT_FORMAT_ELF
1918 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1919 warning ("-ffunction-sections may affect debugging on some targets");
1922 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1923 if (flag_signaling_nans
)
1924 flag_trapping_math
= 1;
1927 /* Initialize the compiler back end. */
1931 init_adjust_machine_modes ();
1933 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
1934 || debug_info_level
== DINFO_LEVEL_VERBOSE
1935 #ifdef VMS_DEBUGGING_INFO
1936 /* Enable line number info for traceback. */
1937 || debug_info_level
> DINFO_LEVEL_NONE
1939 || flag_test_coverage
);
1942 init_fake_stack_mems ();
1946 init_function_once ();
1947 init_varasm_once ();
1949 /* The following initialization functions need to generate rtl, so
1950 provide a dummy function context for them. */
1951 init_dummy_function_start ();
1953 if (flag_caller_saves
)
1954 init_caller_save ();
1955 expand_dummy_function_end ();
1958 /* Language-dependent initialization. Returns nonzero on success. */
1960 lang_dependent_init (const char *name
)
1962 location_t save_loc
= input_location
;
1963 if (dump_base_name
== 0)
1964 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1966 /* Other front-end initialization. */
1967 #ifdef USE_MAPPED_LOCATION
1968 input_location
= BUILTINS_LOCATION
;
1970 input_filename
= "<built-in>";
1973 if (lang_hooks
.init () == 0)
1975 input_location
= save_loc
;
1977 init_asm_output (name
);
1979 /* These create various _DECL nodes, so need to be called after the
1980 front end is initialized. */
1984 /* The following initialization functions need to generate rtl, so
1985 provide a dummy function context for them. */
1986 init_dummy_function_start ();
1988 expand_dummy_function_end ();
1990 /* If dbx symbol table desired, initialize writing it and output the
1991 predefined types. */
1992 timevar_push (TV_SYMOUT
);
1994 #ifdef DWARF2_UNWIND_INFO
1995 if (dwarf2out_do_frame ())
1996 dwarf2out_frame_init ();
1999 /* Now we have the correct original filename, we can initialize
2001 (*debug_hooks
->init
) (name
);
2003 timevar_pop (TV_SYMOUT
);
2008 /* Clean up: close opened files, etc. */
2013 /* Close the dump files. */
2014 if (flag_gen_aux_info
)
2016 fclose (aux_info_file
);
2018 unlink (aux_info_file_name
);
2021 /* Close non-debugging input and output files. Take special care to note
2022 whether fclose returns an error, since the pages might still be on the
2023 buffer chain while the file is open. */
2027 if (ferror (asm_out_file
) != 0)
2028 fatal_error ("error writing to %s: %m", asm_file_name
);
2029 if (fclose (asm_out_file
) != 0)
2030 fatal_error ("error closing %s: %m", asm_file_name
);
2033 finish_optimization_passes ();
2037 ggc_print_statistics ();
2038 stringpool_statistics ();
2039 dump_tree_statistics ();
2040 dump_rtx_statistics ();
2041 dump_varray_statistics ();
2042 dump_alloc_pool_statistics ();
2043 dump_ggc_loc_statistics ();
2046 /* Free up memory for the benefit of leak detectors. */
2049 /* Language-specific end of compilation actions. */
2050 lang_hooks
.finish ();
2053 /* Initialize the compiler, and compile the input file. */
2057 /* Initialize timing first. The C front ends read the main file in
2058 the post_options hook, and C++ does file timings. */
2059 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2061 timevar_start (TV_TOTAL
);
2065 /* Don't do any more if an error has already occurred. */
2068 /* Set up the back-end if requested. */
2072 /* Language-dependent initialization. Returns true on success. */
2073 if (lang_dependent_init (main_input_filename
))
2079 /* Stop timing and print the times. */
2080 timevar_stop (TV_TOTAL
);
2081 timevar_print (stderr
);
2084 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2085 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2086 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2088 It is not safe to call this function more than once. */
2091 toplev_main (unsigned int argc
, const char **argv
)
2095 /* Initialization of GCC's environment, and diagnostics. */
2096 general_init (argv
[0]);
2098 /* Parse the options and do minimal processing; basically just
2099 enough to default flags appropriately. */
2100 decode_options (argc
, argv
);
2104 /* Exit early if we can (e.g. -help). */
2105 if (!exit_after_options
)
2108 if (errorcount
|| sorrycount
)
2109 return (FATAL_EXIT_CODE
);
2111 return (SUCCESS_EXIT_CODE
);