1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
23 /* This is the top level of cc1/c++.
24 It parses command args, opens files, invokes the various passes
25 in the proper order, and counts the time used by each.
26 Error messages and low-level interface to malloc also handled here. */
29 #undef FLOAT /* This is for hpux. They should change hpux. */
30 #undef FFS /* Some systems define this in param.h. */
32 #include "coretypes.h"
36 #ifdef HAVE_SYS_RESOURCE_H
37 # include <sys/resource.h>
40 #ifdef HAVE_SYS_TIMES_H
41 # include <sys/times.h>
51 #include "insn-attr.h"
52 #include "insn-config.h"
53 #include "insn-flags.h"
54 #include "hard-reg-set.h"
61 #include "basic-block.h"
67 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
86 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
87 #include "dwarf2out.h"
90 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
94 #ifdef SDB_DEBUGGING_INFO
98 #ifdef XCOFF_DEBUGGING_INFO
99 #include "xcoffout.h" /* Needed for external data
100 declarations for e.g. AIX 4.x. */
103 static void general_init (const char *);
104 static void do_compile (void);
105 static void process_options (void);
106 static void backend_init (void);
107 static int lang_dependent_init (const char *);
108 static void init_asm_output (const char *);
109 static void finalize (void);
111 static void crash_signal (int) ATTRIBUTE_NORETURN
;
112 static void setup_core_dumping (void);
113 static void compile_file (void);
115 static int print_single_switch (FILE *, int, int, const char *,
116 const char *, const char *,
117 const char *, const char *);
118 static void print_switch_values (FILE *, int, int, const char *,
119 const char *, const char *);
121 /* Nonzero to dump debug info whilst parsing (-dy option). */
122 static int set_yydebug
;
124 /* True if we don't need a backend (e.g. preprocessing only). */
125 static bool no_backend
;
127 /* Length of line when printing switch values. */
130 /* Name of program invoked, sans directories. */
132 const char *progname
;
134 /* Copy of argument vector to toplev_main. */
135 static const char **save_argv
;
137 /* Name of top-level original source file (what was input to cpp).
138 This comes from the #-command at the beginning of the actual input.
139 If there isn't any there, then this is the cc1 input file name. */
141 const char *main_input_filename
;
143 #ifndef USE_MAPPED_LOCATION
144 location_t unknown_location
= { NULL
, 0 };
147 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
148 to optimize and default_debug_hooks in process_options (). */
149 #define AUTODETECT_VALUE 2
151 /* Current position in real source file. */
153 location_t input_location
;
155 struct line_maps line_table
;
157 /* Nonzero if it is unsafe to create any new pseudo registers. */
160 /* Stack of currently pending input files. */
162 struct file_stack
*input_file_stack
;
164 /* Incremented on each change to input_file_stack. */
165 int input_file_stack_tick
;
167 /* Name to use as base of names for dump output files. */
169 const char *dump_base_name
;
171 /* Name to use as a base for auxiliary output files. */
173 const char *aux_base_name
;
175 /* Bit flags that specify the machine subtype we are compiling for.
176 Bits are tested using macros TARGET_... defined in the tm.h file
177 and set by `-m...' switches. Must be defined in rtlanal.c. */
179 extern int target_flags
;
181 /* A mask of target_flags that includes bit X if X was set or cleared
182 on the command line. */
184 int target_flags_explicit
;
186 /* Debug hooks - dependent upon command line options. */
188 const struct gcc_debug_hooks
*debug_hooks
;
190 /* Debug hooks - target default. */
192 static const struct gcc_debug_hooks
*default_debug_hooks
;
194 /* Other flags saying which kinds of debugging dump have been requested. */
196 int rtl_dump_and_exit
;
197 int flag_print_asm_name
;
198 enum graph_dump_types graph_dump_format
;
200 /* Name for output file of assembly code, specified with -o. */
202 const char *asm_file_name
;
204 /* Nonzero means do optimizations. -O.
205 Particular numeric values stand for particular amounts of optimization;
206 thus, -O2 stores 2 here. However, the optimizations beyond the basic
207 ones are not controlled directly by this variable. Instead, they are
208 controlled by individual `flag_...' variables that are defaulted
209 based on this variable. */
213 /* Nonzero means optimize for size. -Os.
214 The only valid values are zero and nonzero. When optimize_size is
215 nonzero, optimize defaults to 2, but certain individual code
216 bloating optimizations are disabled. */
218 int optimize_size
= 0;
220 /* The FUNCTION_DECL for the function currently being compiled,
221 or 0 if between functions. */
222 tree current_function_decl
;
224 /* Set to the FUNC_BEGIN label of the current function, or NULL
226 const char * current_function_func_begin_label
;
228 /* Temporarily suppress certain warnings.
229 This is set while reading code from a system header file. */
231 int in_system_header
= 0;
233 /* Nonzero means to collect statistics which might be expensive
234 and to print them when we are done. */
235 int flag_detailed_statistics
= 0;
237 /* A random sequence of characters, unless overridden by user. */
238 const char *flag_random_seed
;
240 /* A local time stamp derived from the time of compilation. It will be
241 zero if the system cannot provide a time. It will be -1u, if the
242 user has specified a particular random seed. */
247 /* Nonzero means `char' should be signed. */
249 int flag_signed_char
;
251 /* Nonzero means give an enum type only as many bytes as it needs. A value
252 of 2 means it has not yet been initialized. */
254 int flag_short_enums
;
256 /* Nonzero if structures and unions should be returned in memory.
258 This should only be defined if compatibility with another compiler or
259 with an ABI is needed, because it results in slower code. */
261 #ifndef DEFAULT_PCC_STRUCT_RETURN
262 #define DEFAULT_PCC_STRUCT_RETURN 1
265 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
267 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
269 /* 0 means straightforward implementation of complex divide acceptable.
270 1 means wide ranges of inputs must work for complex divide.
271 2 means C99-like requirements for complex multiply and divide. */
273 int flag_complex_method
= 1;
275 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
276 not just because the tree inliner turned us off. */
278 int flag_really_no_inline
= 2;
280 /* Nonzero means we should be saving declaration info into a .X file. */
282 int flag_gen_aux_info
= 0;
284 /* Specified name of aux-info file. */
286 const char *aux_info_file_name
;
288 /* Nonzero if we are compiling code for a shared library, zero for
293 /* Generate code for GNU or NeXT Objective-C runtime environment. */
295 #ifdef NEXT_OBJC_RUNTIME
296 int flag_next_runtime
= 1;
298 int flag_next_runtime
= 0;
301 /* Set to the default thread-local storage (tls) model to use. */
303 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
305 /* Nonzero means change certain warnings into errors.
306 Usually these are warnings about failure to conform to some standard. */
308 int flag_pedantic_errors
= 0;
310 /* -dA causes debug commentary information to be produced in
311 the generated assembly code (to make it more readable). This option
312 is generally only of use to those who actually need to read the
313 generated assembly code (perhaps while debugging the compiler itself).
314 Currently, this switch is only used by dwarfout.c; however, it is intended
315 to be a catchall for printing debug information in the assembler file. */
317 int flag_debug_asm
= 0;
319 /* -dP causes the rtl to be emitted as a comment in assembly. */
321 int flag_dump_rtl_in_asm
= 0;
323 /* When non-NULL, indicates that whenever space is allocated on the
324 stack, the resulting stack pointer must not pass this
325 address---that is, for stacks that grow downward, the stack pointer
326 must always be greater than or equal to this address; for stacks
327 that grow upward, the stack pointer must be less than this address.
328 At present, the rtx may be either a REG or a SYMBOL_REF, although
329 the support provided depends on the backend. */
332 /* If one, renumber instruction UIDs to reduce the number of
333 unused UIDs if there are a lot of instructions. If greater than
334 one, unconditionally renumber instruction UIDs. */
335 int flag_renumber_insns
= 1;
337 /* Nonzero if we should track variables. When
338 flag_var_tracking == AUTODETECT_VALUE it will be set according
339 to optimize, debug_info_level and debug_hooks in process_options (). */
340 int flag_var_tracking
= AUTODETECT_VALUE
;
342 /* True if the user has tagged the function with the 'section'
345 bool user_defined_section_attribute
= false;
347 /* Values of the -falign-* flags: how much to align labels in code.
348 0 means `use default', 1 means `don't align'.
349 For each variable, there is an _log variant which is the power
350 of two not less than the variable, for .align output. */
353 int align_loops_max_skip
;
355 int align_jumps_max_skip
;
356 int align_labels_log
;
357 int align_labels_max_skip
;
358 int align_functions_log
;
360 /* Like align_functions_log above, but used by front-ends to force the
361 minimum function alignment. Zero means no alignment is forced. */
362 int force_align_functions_log
;
366 const char *const string
;
370 lang_independent_options
;
372 /* Nonzero if subexpressions must be evaluated from left-to-right. */
373 int flag_evaluation_order
= 0;
375 /* The user symbol prefix after having resolved same. */
376 const char *user_label_prefix
;
378 static const param_info lang_independent_params
[] = {
379 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
380 { OPTION, DEFAULT, MIN, MAX, HELP },
381 #include "params.def"
383 { NULL
, 0, 0, 0, NULL
}
386 /* Output files for assembler code (real compiler output)
387 and debugging dumps. */
391 FILE *dump_file
= NULL
;
392 const char *dump_file_name
;
394 /* The current working directory of a translation. It's generally the
395 directory from which compilation was initiated, but a preprocessed
396 file may specify the original directory in which it was
399 static const char *src_pwd
;
401 /* Initialize src_pwd with the given string, and return true. If it
402 was already initialized, return false. As a special case, it may
403 be called with a NULL argument to test whether src_pwd has NOT been
407 set_src_pwd (const char *pwd
)
411 if (strcmp (src_pwd
, pwd
) == 0)
417 src_pwd
= xstrdup (pwd
);
421 /* Return the directory from which the translation unit was initiated,
422 in case set_src_pwd() was not called before to assign it a
438 /* Called when the start of a function definition is parsed,
439 this function prints on stderr the name of the function. */
441 announce_function (tree decl
)
445 if (rtl_dump_and_exit
)
446 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
448 fprintf (stderr
, " %s", lang_hooks
.decl_printable_name (decl
, 2));
450 pp_needs_newline (global_dc
->printer
) = true;
451 diagnostic_set_last_function (global_dc
);
455 /* Set up a default flag_random_seed and local_tick, unless the user
456 already specified one. */
461 if (!flag_random_seed
)
463 unsigned HOST_WIDE_INT value
;
464 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
466 /* Get some more or less random data. */
467 #ifdef HAVE_GETTIMEOFDAY
471 gettimeofday (&tv
, NULL
);
472 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
476 time_t now
= time (NULL
);
478 if (now
!= (time_t)-1)
479 local_tick
= (unsigned) now
;
482 value
= local_tick
^ getpid ();
484 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
485 flag_random_seed
= random_seed
;
487 else if (!local_tick
)
492 /* Decode the string P as an integral parameter.
493 If the string is indeed an integer return its numeric value else
494 issue an Invalid Option error for the option PNAME and return DEFVAL.
495 If PNAME is zero just return DEFVAL, do not call error. */
498 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
500 const char *endp
= p
;
513 error ("invalid option argument %qs", pname
);
520 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
521 for floor_log2 and exact_log2; see toplev.h. That construct, however,
522 conflicts with the ISO C++ One Definition Rule. */
524 #if GCC_VERSION < 3004 || !defined (__cplusplus)
526 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
527 If X is 0, return -1. */
530 floor_log2 (unsigned HOST_WIDE_INT x
)
538 t
= HOST_BITS_PER_WIDE_INT
- 1 - (int) CLZ_HWI (x
);
540 if (HOST_BITS_PER_WIDE_INT
> 64)
541 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
543 if (HOST_BITS_PER_WIDE_INT
> 32)
544 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
546 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
548 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
550 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
552 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
554 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
561 /* Return the logarithm of X, base 2, considering X unsigned,
562 if X is a power of 2. Otherwise, returns -1. */
565 exact_log2 (unsigned HOST_WIDE_INT x
)
570 return x
? CTZ_HWI (x
) : -1;
572 return floor_log2 (x
);
576 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
578 /* Handler for fatal signals, such as SIGSEGV. These are transformed
579 into ICE messages, which is much more user friendly. In case the
580 error printer crashes, reset the signal to prevent infinite recursion. */
583 crash_signal (int signo
)
585 signal (signo
, SIG_DFL
);
587 /* If we crashed while processing an ASM statement, then be a little more
588 graceful. It's most likely the user's fault. */
589 if (this_is_asm_operands
)
591 output_operand_lossage ("unrecoverable error");
592 exit (FATAL_EXIT_CODE
);
595 internal_error ("%s", strsignal (signo
));
598 /* Arrange to dump core on error. (The regular error message is still
599 printed first, except in the case of abort().) */
602 setup_core_dumping (void)
605 signal (SIGABRT
, SIG_DFL
);
607 #if defined(HAVE_SETRLIMIT)
610 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
611 fatal_error ("getting core file size maximum limit: %m");
612 rlim
.rlim_cur
= rlim
.rlim_max
;
613 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
614 fatal_error ("setting core file size limit to maximum: %m");
617 diagnostic_abort_on_error (global_dc
);
621 /* Strip off a legitimate source ending from the input string NAME of
622 length LEN. Rather than having to know the names used by all of
623 our front ends, we strip off an ending of a period followed by
624 up to five characters. (Java uses ".class".) */
627 strip_off_ending (char *name
, int len
)
630 for (i
= 2; i
< 6 && len
> i
; i
++)
632 if (name
[len
- i
] == '.')
634 name
[len
- i
] = '\0';
640 /* Output a quoted string. */
643 output_quoted_string (FILE *asm_file
, const char *string
)
645 #ifdef OUTPUT_QUOTED_STRING
646 OUTPUT_QUOTED_STRING (asm_file
, string
);
650 putc ('\"', asm_file
);
651 while ((c
= *string
++) != 0)
655 if (c
== '\"' || c
== '\\')
656 putc ('\\', asm_file
);
660 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
662 putc ('\"', asm_file
);
666 /* Output a file name in the form wanted by System V. */
669 output_file_directive (FILE *asm_file
, const char *input_name
)
674 if (input_name
== NULL
)
675 input_name
= "<stdin>";
677 len
= strlen (input_name
);
678 na
= input_name
+ len
;
680 /* NA gets INPUT_NAME sans directory names. */
681 while (na
> input_name
)
683 if (IS_DIR_SEPARATOR (na
[-1]))
688 #ifdef ASM_OUTPUT_SOURCE_FILENAME
689 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
691 fprintf (asm_file
, "\t.file\t");
692 output_quoted_string (asm_file
, na
);
693 fputc ('\n', asm_file
);
697 /* A subroutine of wrapup_global_declarations. We've come to the end of
698 the compilation unit. All deferred variables should be undeferred,
699 and all incomplete decls should be finalized. */
702 wrapup_global_declaration_1 (tree decl
)
704 /* We're not deferring this any longer. Assignment is conditional to
705 avoid needlessly dirtying PCH pages. */
706 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
707 && DECL_DEFER_OUTPUT (decl
) != 0)
708 DECL_DEFER_OUTPUT (decl
) = 0;
710 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
711 lang_hooks
.finish_incomplete_decl (decl
);
714 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
715 needs to be output. Return true if it is output. */
718 wrapup_global_declaration_2 (tree decl
)
720 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
723 /* Don't write out static consts, unless we still need them.
725 We also keep static consts if not optimizing (for debugging),
726 unless the user specified -fno-keep-static-consts.
727 ??? They might be better written into the debug information.
728 This is possible when using DWARF.
730 A language processor that wants static constants to be always
731 written out (even if it is not used) is responsible for
732 calling rest_of_decl_compilation itself. E.g. the C front-end
733 calls rest_of_decl_compilation from finish_decl.
734 One motivation for this is that is conventional in some
735 environments to write things like:
736 static const char rcsid[] = "... version string ...";
737 intending to force the string to be in the executable.
739 A language processor that would prefer to have unneeded
740 static constants "optimized away" would just defer writing
741 them out until here. E.g. C++ does this, because static
742 constants are often defined in header files.
744 ??? A tempting alternative (for both C and C++) would be
745 to force a constant to be written if and only if it is
746 defined in a main file, as opposed to an include file. */
748 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
750 struct cgraph_varpool_node
*node
;
752 node
= cgraph_varpool_node (decl
);
756 else if (node
->alias
)
758 else if (!cgraph_global_info_ready
760 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
762 else if (node
->needed
)
764 else if (DECL_COMDAT (decl
))
766 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
767 && (optimize
|| !flag_keep_static_consts
768 || DECL_ARTIFICIAL (decl
)))
773 rest_of_decl_compilation (decl
, 1, 1);
781 /* Do any final processing required for the declarations in VEC, of
782 which there are LEN. We write out inline functions and variables
783 that have been deferred until this point, but which are required.
784 Returns nonzero if anything was put out. */
787 wrapup_global_declarations (tree
*vec
, int len
)
789 bool reconsider
, output_something
= false;
792 for (i
= 0; i
< len
; i
++)
793 wrapup_global_declaration_1 (vec
[i
]);
795 /* Now emit any global variables or functions that we have been
796 putting off. We need to loop in case one of the things emitted
797 here references another one which comes earlier in the list. */
801 for (i
= 0; i
< len
; i
++)
802 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
804 output_something
= true;
808 return output_something
;
811 /* A subroutine of check_global_declarations. Issue appropriate warnings
812 for the global declaration DECL. */
815 check_global_declaration_1 (tree decl
)
817 /* Warn about any function declared static but not defined. We don't
818 warn about variables, because many programs have static variables
819 that exist only to get some text into the object file. */
820 if (TREE_CODE (decl
) == FUNCTION_DECL
821 && DECL_INITIAL (decl
) == 0
822 && DECL_EXTERNAL (decl
)
823 && ! DECL_ARTIFICIAL (decl
)
824 && ! TREE_NO_WARNING (decl
)
825 && ! TREE_PUBLIC (decl
)
826 && (warn_unused_function
827 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
829 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
830 pedwarn ("%q+F used but never defined", decl
);
832 warning (0, "%q+F declared %<static%> but never defined", decl
);
833 /* This symbol is effectively an "extern" declaration now. */
834 TREE_PUBLIC (decl
) = 1;
835 assemble_external (decl
);
838 /* Warn about static fns or vars defined but not used. */
839 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
840 /* We don't warn about "static const" variables because the
841 "rcs_id" idiom uses that construction. */
842 || (warn_unused_variable
843 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
844 && ! DECL_IN_SYSTEM_HEADER (decl
)
845 && ! TREE_USED (decl
)
846 /* The TREE_USED bit for file-scope decls is kept in the identifier,
847 to handle multiple external decls in different scopes. */
848 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
849 && ! DECL_EXTERNAL (decl
)
850 && ! TREE_PUBLIC (decl
)
851 /* A volatile variable might be used in some non-obvious way. */
852 && ! TREE_THIS_VOLATILE (decl
)
853 /* Global register variables must be declared to reserve them. */
854 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
855 /* Otherwise, ask the language. */
856 && lang_hooks
.decls
.warn_unused_global (decl
))
857 warning (0, "%q+D defined but not used", decl
);
860 /* Issue appropriate warnings for the global declarations in VEC (of
861 which there are LEN). */
864 check_global_declarations (tree
*vec
, int len
)
868 for (i
= 0; i
< len
; i
++)
869 check_global_declaration_1 (vec
[i
]);
872 /* Emit debugging information for all global declarations in VEC. */
875 emit_debug_global_declarations (tree
*vec
, int len
)
879 /* Avoid confusing the debug information machinery when there are errors. */
880 if (errorcount
!= 0 || sorrycount
!= 0)
883 timevar_push (TV_SYMOUT
);
884 for (i
= 0; i
< len
; i
++)
885 debug_hooks
->global_decl (vec
[i
]);
886 timevar_pop (TV_SYMOUT
);
889 /* Warn about a use of an identifier which was marked deprecated. */
891 warn_deprecated_use (tree node
)
893 if (node
== 0 || !warn_deprecated_decl
)
898 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
899 warning (OPT_Wdeprecated_declarations
,
900 "%qs is deprecated (declared at %s:%d)",
901 IDENTIFIER_POINTER (DECL_NAME (node
)),
902 xloc
.file
, xloc
.line
);
904 else if (TYPE_P (node
))
906 const char *what
= NULL
;
907 tree decl
= TYPE_STUB_DECL (node
);
909 if (TYPE_NAME (node
))
911 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
912 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
913 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
914 && DECL_NAME (TYPE_NAME (node
)))
915 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
920 expanded_location xloc
921 = expand_location (DECL_SOURCE_LOCATION (decl
));
923 warning (OPT_Wdeprecated_declarations
,
924 "%qs is deprecated (declared at %s:%d)", what
,
925 xloc
.file
, xloc
.line
);
927 warning (OPT_Wdeprecated_declarations
,
928 "type is deprecated (declared at %s:%d)",
929 xloc
.file
, xloc
.line
);
934 warning (OPT_Wdeprecated_declarations
, "%qs is deprecated", what
);
936 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
941 /* Save the current INPUT_LOCATION on the top entry in the
942 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
943 INPUT_LOCATION accordingly. */
946 #ifdef USE_MAPPED_LOCATION
947 push_srcloc (location_t fline
)
949 push_srcloc (const char *file
, int line
)
952 struct file_stack
*fs
;
954 fs
= XNEW (struct file_stack
);
955 fs
->location
= input_location
;
956 fs
->next
= input_file_stack
;
957 #ifdef USE_MAPPED_LOCATION
958 input_location
= fline
;
960 input_filename
= file
;
963 input_file_stack
= fs
;
964 input_file_stack_tick
++;
967 /* Pop the top entry off the stack of presently open source files.
968 Restore the INPUT_LOCATION from the new topmost entry on the
974 struct file_stack
*fs
;
976 fs
= input_file_stack
;
977 input_location
= fs
->location
;
978 input_file_stack
= fs
->next
;
980 input_file_stack_tick
++;
983 /* Compile an entire translation unit. Write a file of assembly
984 output and various debugging dumps. */
989 /* Initialize yet another pass. */
992 init_final (main_input_filename
);
993 coverage_init (aux_base_name
);
995 timevar_push (TV_PARSE
);
997 /* Call the parser, which parses the entire file (calling
998 rest_of_compilation for each function). */
999 lang_hooks
.parse_file (set_yydebug
);
1001 /* In case there were missing block closers,
1002 get us back to the global binding level. */
1003 lang_hooks
.clear_binding_stack ();
1005 /* Compilation is now finished except for writing
1006 what's left of the symbol table output. */
1007 timevar_pop (TV_PARSE
);
1009 if (flag_syntax_only
)
1012 lang_hooks
.decls
.final_write_globals ();
1013 cgraph_varpool_assemble_pending_decls ();
1014 finish_aliases_2 ();
1016 /* This must occur after the loop to output deferred functions.
1017 Else the coverage initializer would not be emitted if all the
1018 functions in this compilation unit were deferred. */
1021 /* Likewise for mudflap static object registrations. */
1023 mudflap_finish_file ();
1025 /* Write out any pending weak symbol declarations. */
1029 /* Do dbx symbols. */
1030 timevar_push (TV_SYMOUT
);
1032 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1033 if (dwarf2out_do_frame ())
1034 dwarf2out_frame_finish ();
1037 (*debug_hooks
->finish
) (main_input_filename
);
1038 timevar_pop (TV_SYMOUT
);
1040 /* Output some stuff at end of file if nec. */
1042 dw2_output_indirect_constants ();
1044 /* Flush any pending external directives. cgraph did this for
1045 assemble_external calls from the front end, but the RTL
1046 expander can also generate them. */
1047 process_pending_assemble_externals ();
1049 /* Attach a special .ident directive to the end of the file to identify
1050 the version of GCC which compiled this code. The format of the .ident
1051 string is patterned after the ones produced by native SVR4 compilers. */
1054 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
1055 IDENT_ASM_OP
, version_string
);
1058 /* This must be at the end. Some target ports emit end of file directives
1059 into the assembly file here, and hence we can not output anything to the
1060 assembly file after this point. */
1061 targetm
.asm_out
.file_end ();
1064 /* Parse a -d... command line switch. */
1067 decode_d_option (const char *arg
)
1078 flag_print_asm_name
= 1;
1081 flag_dump_rtl_in_asm
= 1;
1082 flag_print_asm_name
= 1;
1085 graph_dump_format
= vcg
;
1088 rtl_dump_and_exit
= 1;
1093 case 'D': /* These are handled by the preprocessor. */
1097 setup_core_dumping();
1102 if (!enable_rtl_dump_file (c
))
1103 warning (0, "unrecognized gcc debugging option: %c", c
);
1108 /* Indexed by enum debug_info_type. */
1109 const char *const debug_type_names
[] =
1111 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1114 /* Print version information to FILE.
1115 Each line begins with INDENT (for the case where FILE is the
1116 assembler output file). */
1119 print_version (FILE *file
, const char *indent
)
1121 static const char fmt1
[] =
1123 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1125 N_("%s%s%s version %s (%s) compiled by CC.\n")
1128 static const char fmt2
[] =
1129 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1131 #define __VERSION__ "[?]"
1134 file
== stderr
? _(fmt1
) : fmt1
,
1135 indent
, *indent
!= 0 ? " " : "",
1136 lang_hooks
.name
, version_string
, TARGET_NAME
,
1137 indent
, __VERSION__
);
1139 file
== stderr
? _(fmt2
) : fmt2
,
1140 indent
, *indent
!= 0 ? " " : "",
1141 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1144 /* Print an option value and return the adjusted position in the line.
1145 ??? We don't handle error returns from fprintf (disk full); presumably
1146 other code will catch a disk full though. */
1149 print_single_switch (FILE *file
, int pos
, int max
,
1150 const char *indent
, const char *sep
, const char *term
,
1151 const char *type
, const char *name
)
1153 /* The ultrix fprintf returns 0 on success, so compute the result we want
1154 here since we need it for the following test. */
1155 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
1160 fprintf (file
, "%s", term
);
1165 fprintf (file
, "%s", indent
);
1166 pos
= strlen (indent
);
1168 fprintf (file
, "%s%s%s", sep
, type
, name
);
1173 /* Print active target switches to FILE.
1174 POS is the current cursor position and MAX is the size of a "line".
1175 Each line begins with INDENT and ends with TERM.
1176 Each switch is separated from the next by SEP. */
1179 print_switch_values (FILE *file
, int pos
, int max
,
1180 const char *indent
, const char *sep
, const char *term
)
1185 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1186 that it can be printed below. This helps reproducibility. */
1189 /* Print the options as passed. */
1190 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
1191 _("options passed: "), "");
1193 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1197 if (strcmp (*p
, "-o") == 0)
1203 if (strcmp (*p
, "-quiet") == 0)
1205 if (strcmp (*p
, "-version") == 0)
1210 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
1213 fprintf (file
, "%s", term
);
1215 /* Print the -f and -m options that have been enabled.
1216 We don't handle language specific options but printing argv
1219 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
1220 _("options enabled: "), "");
1222 for (j
= 0; j
< cl_options_count
; j
++)
1223 if ((cl_options
[j
].flags
& CL_REPORT
)
1224 && option_enabled (j
) > 0)
1225 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1226 "", cl_options
[j
].opt_text
);
1228 fprintf (file
, "%s", term
);
1231 /* Open assembly code output file. Do this even if -fsyntax-only is
1232 on, because then the driver will have provided the name of a
1233 temporary file or bit bucket for us. NAME is the file specified on
1234 the command line, possibly NULL. */
1236 init_asm_output (const char *name
)
1238 if (name
== NULL
&& asm_file_name
== 0)
1239 asm_out_file
= stdout
;
1242 if (asm_file_name
== 0)
1244 int len
= strlen (dump_base_name
);
1245 char *dumpname
= XNEWVEC (char, len
+ 6);
1246 memcpy (dumpname
, dump_base_name
, len
+ 1);
1247 strip_off_ending (dumpname
, len
);
1248 strcat (dumpname
, ".s");
1249 asm_file_name
= dumpname
;
1251 if (!strcmp (asm_file_name
, "-"))
1252 asm_out_file
= stdout
;
1254 asm_out_file
= fopen (asm_file_name
, "w+b");
1255 if (asm_out_file
== 0)
1256 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1259 if (!flag_syntax_only
)
1261 targetm
.asm_out
.file_start ();
1263 #ifdef ASM_COMMENT_START
1264 if (flag_verbose_asm
)
1266 /* Print the list of options in effect. */
1267 print_version (asm_out_file
, ASM_COMMENT_START
);
1268 print_switch_values (asm_out_file
, 0, MAX_LINE
,
1269 ASM_COMMENT_START
, " ", "\n");
1270 /* Add a blank line here so it appears in assembler output but not
1272 fprintf (asm_out_file
, "\n");
1278 /* Return true if the state of option OPTION should be stored in PCH files
1279 and checked by default_pch_valid_p. Store the option's current state
1283 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1285 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1287 if (cl_options
[option
].flag_var
== &target_flags
)
1288 if (targetm
.check_pch_target_flags
)
1290 return get_option_state (option
, state
);
1293 /* Default version of get_pch_validity.
1294 By default, every flag difference is fatal; that will be mostly right for
1295 most targets, but completely right for very few. */
1298 default_get_pch_validity (size_t *len
)
1300 struct cl_option_state state
;
1305 if (targetm
.check_pch_target_flags
)
1306 *len
+= sizeof (target_flags
);
1307 for (i
= 0; i
< cl_options_count
; i
++)
1308 if (option_affects_pch_p (i
, &state
))
1311 result
= r
= XNEWVEC (char, *len
);
1315 if (targetm
.check_pch_target_flags
)
1317 memcpy (r
, &target_flags
, sizeof (target_flags
));
1318 r
+= sizeof (target_flags
);
1321 for (i
= 0; i
< cl_options_count
; i
++)
1322 if (option_affects_pch_p (i
, &state
))
1324 memcpy (r
, state
.data
, state
.size
);
1331 /* Return a message which says that a PCH file was created with a different
1332 setting of OPTION. */
1335 pch_option_mismatch (const char *option
)
1339 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1341 return _("out of memory");
1345 /* Default version of pch_valid_p. */
1348 default_pch_valid_p (const void *data_p
, size_t len
)
1350 struct cl_option_state state
;
1351 const char *data
= (const char *)data_p
;
1354 /* -fpic and -fpie also usually make a PCH invalid. */
1355 if (data
[0] != flag_pic
)
1356 return _("created and used with different settings of -fpic");
1357 if (data
[1] != flag_pie
)
1358 return _("created and used with different settings of -fpie");
1361 /* Check target_flags. */
1362 if (targetm
.check_pch_target_flags
)
1367 memcpy (&tf
, data
, sizeof (target_flags
));
1368 data
+= sizeof (target_flags
);
1369 len
-= sizeof (target_flags
);
1370 r
= targetm
.check_pch_target_flags (tf
);
1375 for (i
= 0; i
< cl_options_count
; i
++)
1376 if (option_affects_pch_p (i
, &state
))
1378 if (memcmp (data
, state
.data
, state
.size
) != 0)
1379 return pch_option_mismatch (cl_options
[i
].opt_text
);
1387 /* Default tree printer. Handles declarations only. */
1389 default_tree_printer (pretty_printer
* pp
, text_info
*text
, const char *spec
,
1390 int precision
, bool wide
, bool set_locus
, bool hash
)
1394 /* FUTURE: %+x should set the locus. */
1395 if (precision
!= 0 || wide
|| hash
)
1401 t
= va_arg (*text
->args_ptr
, tree
);
1402 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1403 t
= DECL_DEBUG_EXPR (t
);
1408 t
= va_arg (*text
->args_ptr
, tree
);
1415 if (set_locus
&& text
->locus
)
1416 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1420 const char *n
= DECL_NAME (t
)
1421 ? lang_hooks
.decl_printable_name (t
, 2)
1426 dump_generic_node (pp
, t
, 0, 0, 0);
1431 /* Initialization of the front end environment, before command line
1432 options are parsed. Signal handlers, internationalization etc.
1433 ARGV0 is main's argv[0]. */
1435 general_init (const char *argv0
)
1439 p
= argv0
+ strlen (argv0
);
1440 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1444 xmalloc_set_program_name (progname
);
1448 /* Unlock the stdio streams. */
1449 unlock_std_streams ();
1451 gcc_init_libintl ();
1453 /* Initialize the diagnostics reporting machinery, so option parsing
1454 can give warnings and errors. */
1455 diagnostic_initialize (global_dc
);
1456 /* Set a default printer. Language specific initializations will
1457 override it later. */
1458 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1460 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1462 signal (SIGSEGV
, crash_signal
);
1465 signal (SIGILL
, crash_signal
);
1468 signal (SIGBUS
, crash_signal
);
1471 signal (SIGABRT
, crash_signal
);
1473 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1474 signal (SIGIOT
, crash_signal
);
1477 signal (SIGFPE
, crash_signal
);
1480 /* Other host-specific signal setup. */
1481 (*host_hooks
.extra_signals
)();
1483 /* Initialize the garbage-collector, string pools and tree type hash
1487 linemap_init (&line_table
);
1490 /* Initialize register usage now so switches may override. */
1493 /* Register the language-independent parameters. */
1494 add_params (lang_independent_params
, LAST_PARAM
);
1496 /* This must be done after add_params but before argument processing. */
1497 init_ggc_heuristics();
1498 init_optimization_passes ();
1501 /* Process the options that have been parsed. */
1503 process_options (void)
1505 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1506 This can happen with incorrect pre-processed input. */
1507 debug_hooks
= &do_nothing_debug_hooks
;
1509 /* Allow the front end to perform consistency checks and do further
1510 initialization based on the command line options. This hook also
1511 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1512 so we can correctly initialize debug output. */
1513 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1514 #ifndef USE_MAPPED_LOCATION
1515 input_filename
= main_input_filename
;
1518 #ifdef OVERRIDE_OPTIONS
1519 /* Some machines may reject certain combinations of options. */
1523 if (flag_short_enums
== 2)
1524 flag_short_enums
= targetm
.default_short_enums ();
1526 /* Set aux_base_name if not already set. */
1529 else if (main_input_filename
)
1531 char *name
= xstrdup (lbasename (main_input_filename
));
1533 strip_off_ending (name
, strlen (name
));
1534 aux_base_name
= name
;
1537 aux_base_name
= "gccaux";
1539 /* Set up the align_*_log variables, defaulting them to 1 if they
1540 were still unset. */
1541 if (align_loops
<= 0) align_loops
= 1;
1542 if (align_loops_max_skip
> align_loops
|| !align_loops
)
1543 align_loops_max_skip
= align_loops
- 1;
1544 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1545 if (align_jumps
<= 0) align_jumps
= 1;
1546 if (align_jumps_max_skip
> align_jumps
|| !align_jumps
)
1547 align_jumps_max_skip
= align_jumps
- 1;
1548 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1549 if (align_labels
<= 0) align_labels
= 1;
1550 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1551 if (align_labels_max_skip
> align_labels
|| !align_labels
)
1552 align_labels_max_skip
= align_labels
- 1;
1553 if (align_functions
<= 0) align_functions
= 1;
1554 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1556 /* Unrolling all loops implies that standard loop unrolling must also
1558 if (flag_unroll_all_loops
)
1559 flag_unroll_loops
= 1;
1561 /* The loop unrolling code assumes that cse will be run after loop.
1562 web and rename-registers also help when run after loop unrolling. */
1564 if (flag_rerun_cse_after_loop
== AUTODETECT_VALUE
)
1565 flag_rerun_cse_after_loop
= flag_unroll_loops
|| flag_peel_loops
;
1566 if (flag_web
== AUTODETECT_VALUE
)
1567 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1568 if (flag_rename_registers
== AUTODETECT_VALUE
)
1569 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1571 if (flag_non_call_exceptions
)
1572 flag_asynchronous_unwind_tables
= 1;
1573 if (flag_asynchronous_unwind_tables
)
1574 flag_unwind_tables
= 1;
1576 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1578 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
1579 flag_unit_at_a_time
= 0;
1581 if (flag_value_profile_transformations
)
1582 flag_profile_values
= 1;
1584 /* Warn about options that are not supported on this machine. */
1585 #ifndef INSN_SCHEDULING
1586 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1587 warning (0, "instruction scheduling not supported on this target machine");
1590 if (flag_delayed_branch
)
1591 warning (0, "this target machine does not have delayed branches");
1594 user_label_prefix
= USER_LABEL_PREFIX
;
1595 if (flag_leading_underscore
!= -1)
1597 /* If the default prefix is more complicated than "" or "_",
1598 issue a warning and ignore this option. */
1599 if (user_label_prefix
[0] == 0 ||
1600 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1602 user_label_prefix
= flag_leading_underscore
? "_" : "";
1605 warning (0, "-f%sleading-underscore not supported on this target machine",
1606 flag_leading_underscore
? "" : "no-");
1609 /* If we are in verbose mode, write out the version and maybe all the
1610 option flags in use. */
1613 print_version (stderr
, "");
1615 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
1618 if (flag_syntax_only
)
1620 write_symbols
= NO_DEBUG
;
1624 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1626 if (debug_info_level
== DINFO_LEVEL_NONE
)
1627 write_symbols
= NO_DEBUG
;
1629 /* Now we know write_symbols, set up the debug hooks based on it.
1630 By default we do nothing for debug output. */
1631 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1632 default_debug_hooks
= &do_nothing_debug_hooks
;
1633 #if defined(DBX_DEBUGGING_INFO)
1634 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1635 default_debug_hooks
= &dbx_debug_hooks
;
1637 #if defined(XCOFF_DEBUGGING_INFO)
1638 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1639 default_debug_hooks
= &xcoff_debug_hooks
;
1641 #ifdef SDB_DEBUGGING_INFO
1642 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1643 default_debug_hooks
= &sdb_debug_hooks
;
1645 #ifdef DWARF2_DEBUGGING_INFO
1646 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1647 default_debug_hooks
= &dwarf2_debug_hooks
;
1649 #ifdef VMS_DEBUGGING_INFO
1650 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1651 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1652 default_debug_hooks
= &vmsdbg_debug_hooks
;
1655 if (write_symbols
== NO_DEBUG
)
1657 #if defined(DBX_DEBUGGING_INFO)
1658 else if (write_symbols
== DBX_DEBUG
)
1659 debug_hooks
= &dbx_debug_hooks
;
1661 #if defined(XCOFF_DEBUGGING_INFO)
1662 else if (write_symbols
== XCOFF_DEBUG
)
1663 debug_hooks
= &xcoff_debug_hooks
;
1665 #ifdef SDB_DEBUGGING_INFO
1666 else if (write_symbols
== SDB_DEBUG
)
1667 debug_hooks
= &sdb_debug_hooks
;
1669 #ifdef DWARF2_DEBUGGING_INFO
1670 else if (write_symbols
== DWARF2_DEBUG
)
1671 debug_hooks
= &dwarf2_debug_hooks
;
1673 #ifdef VMS_DEBUGGING_INFO
1674 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1675 debug_hooks
= &vmsdbg_debug_hooks
;
1678 error ("target system does not support the \"%s\" debug format",
1679 debug_type_names
[write_symbols
]);
1681 /* Now we know which debug output will be used so we can set
1682 flag_var_tracking, flag_rename_registers if the user has
1683 not specified them. */
1684 if (debug_info_level
< DINFO_LEVEL_NORMAL
1685 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1687 if (flag_var_tracking
== 1)
1689 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1690 warning (0, "variable tracking requested, but useless unless "
1691 "producing debug info");
1693 warning (0, "variable tracking requested, but not supported "
1694 "by this debug format");
1696 flag_var_tracking
= 0;
1699 if (flag_rename_registers
== AUTODETECT_VALUE
)
1700 flag_rename_registers
= default_debug_hooks
->var_location
1701 != do_nothing_debug_hooks
.var_location
;
1703 if (flag_var_tracking
== AUTODETECT_VALUE
)
1704 flag_var_tracking
= optimize
>= 1;
1706 /* If auxiliary info generation is desired, open the output file.
1707 This goes in the same directory as the source file--unlike
1708 all the other output files. */
1709 if (flag_gen_aux_info
)
1711 aux_info_file
= fopen (aux_info_file_name
, "w");
1712 if (aux_info_file
== 0)
1713 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1716 if (! targetm
.have_named_sections
)
1718 if (flag_function_sections
)
1720 warning (0, "-ffunction-sections not supported for this target");
1721 flag_function_sections
= 0;
1723 if (flag_data_sections
)
1725 warning (0, "-fdata-sections not supported for this target");
1726 flag_data_sections
= 0;
1730 if (flag_function_sections
&& profile_flag
)
1732 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1733 flag_function_sections
= 0;
1736 #ifndef HAVE_prefetch
1737 if (flag_prefetch_loop_arrays
)
1739 warning (0, "-fprefetch-loop-arrays not supported for this target");
1740 flag_prefetch_loop_arrays
= 0;
1743 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1745 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1746 flag_prefetch_loop_arrays
= 0;
1750 /* This combination of options isn't handled for i386 targets and doesn't
1751 make much sense anyway, so don't allow it. */
1752 if (flag_prefetch_loop_arrays
&& optimize_size
)
1754 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1755 flag_prefetch_loop_arrays
= 0;
1758 #ifndef OBJECT_FORMAT_ELF
1759 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1760 warning (0, "-ffunction-sections may affect debugging on some targets");
1763 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1764 if (flag_signaling_nans
)
1765 flag_trapping_math
= 1;
1767 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1768 if (flag_cx_limited_range
)
1769 flag_complex_method
= 0;
1771 /* Targets must be able to place spill slots at lower addresses. If the
1772 target already uses a soft frame pointer, the transition is trivial. */
1773 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1775 warning (0, "-fstack-protector not supported for this target");
1776 flag_stack_protect
= 0;
1778 if (!flag_stack_protect
)
1779 warn_stack_protect
= 0;
1781 /* ??? Unwind info is not correct around the CFG unless either a frame
1782 pointer is present or A_O_A is set. Fixing this requires rewriting
1783 unwind info generation to be aware of the CFG and propagating states
1785 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
1786 && flag_omit_frame_pointer
)
1788 warning (0, "unwind tables currently requires a frame pointer "
1790 flag_omit_frame_pointer
= 0;
1794 /* Initialize the compiler back end. */
1798 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
1799 || debug_info_level
== DINFO_LEVEL_VERBOSE
1800 #ifdef VMS_DEBUGGING_INFO
1801 /* Enable line number info for traceback. */
1802 || debug_info_level
> DINFO_LEVEL_NONE
1804 || flag_test_coverage
);
1808 init_fake_stack_mems ();
1812 init_varasm_once ();
1814 /* The following initialization functions need to generate rtl, so
1815 provide a dummy function context for them. */
1816 init_dummy_function_start ();
1818 if (flag_caller_saves
)
1819 init_caller_save ();
1820 expand_dummy_function_end ();
1823 /* Language-dependent initialization. Returns nonzero on success. */
1825 lang_dependent_init (const char *name
)
1827 location_t save_loc
= input_location
;
1828 if (dump_base_name
== 0)
1829 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1831 /* Other front-end initialization. */
1832 #ifdef USE_MAPPED_LOCATION
1833 input_location
= BUILTINS_LOCATION
;
1835 input_filename
= "<built-in>";
1838 if (lang_hooks
.init () == 0)
1840 input_location
= save_loc
;
1842 init_asm_output (name
);
1844 /* These create various _DECL nodes, so need to be called after the
1845 front end is initialized. */
1849 /* The following initialization functions need to generate rtl, so
1850 provide a dummy function context for them. */
1851 init_dummy_function_start ();
1853 expand_dummy_function_end ();
1855 /* If dbx symbol table desired, initialize writing it and output the
1856 predefined types. */
1857 timevar_push (TV_SYMOUT
);
1859 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1860 if (dwarf2out_do_frame ())
1861 dwarf2out_frame_init ();
1864 /* Now we have the correct original filename, we can initialize
1866 (*debug_hooks
->init
) (name
);
1868 timevar_pop (TV_SYMOUT
);
1873 /* Clean up: close opened files, etc. */
1878 /* Close the dump files. */
1879 if (flag_gen_aux_info
)
1881 fclose (aux_info_file
);
1883 unlink (aux_info_file_name
);
1886 /* Close non-debugging input and output files. Take special care to note
1887 whether fclose returns an error, since the pages might still be on the
1888 buffer chain while the file is open. */
1892 if (ferror (asm_out_file
) != 0)
1893 fatal_error ("error writing to %s: %m", asm_file_name
);
1894 if (fclose (asm_out_file
) != 0)
1895 fatal_error ("error closing %s: %m", asm_file_name
);
1898 finish_optimization_passes ();
1902 ggc_print_statistics ();
1903 stringpool_statistics ();
1904 dump_tree_statistics ();
1905 dump_rtx_statistics ();
1906 dump_varray_statistics ();
1907 dump_alloc_pool_statistics ();
1908 dump_ggc_loc_statistics ();
1911 /* Free up memory for the benefit of leak detectors. */
1914 /* Language-specific end of compilation actions. */
1915 lang_hooks
.finish ();
1918 /* Initialize the compiler, and compile the input file. */
1922 /* Initialize timing first. The C front ends read the main file in
1923 the post_options hook, and C++ does file timings. */
1924 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
1926 timevar_start (TV_TOTAL
);
1930 /* Don't do any more if an error has already occurred. */
1933 /* This must be run always, because it is needed to compute the FP
1934 predefined macros, such as __LDBL_MAX__, for targets using non
1935 default FP formats. */
1936 init_adjust_machine_modes ();
1938 /* Set up the back-end if requested. */
1942 /* Language-dependent initialization. Returns true on success. */
1943 if (lang_dependent_init (main_input_filename
))
1949 /* Stop timing and print the times. */
1950 timevar_stop (TV_TOTAL
);
1951 timevar_print (stderr
);
1954 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1955 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1956 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1958 It is not safe to call this function more than once. */
1961 toplev_main (unsigned int argc
, const char **argv
)
1965 /* Initialization of GCC's environment, and diagnostics. */
1966 general_init (argv
[0]);
1968 /* Parse the options and do minimal processing; basically just
1969 enough to default flags appropriately. */
1970 decode_options (argc
, argv
);
1974 /* Exit early if we can (e.g. -help). */
1975 if (!exit_after_options
)
1978 if (errorcount
|| sorrycount
)
1979 return (FATAL_EXIT_CODE
);
1981 return (SUCCESS_EXIT_CODE
);