1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
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"
84 #include "tree-pass.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 /* Nonzero to dump debug info whilst parsing (-dy option). */
116 static int set_yydebug
;
118 /* True if we don't need a backend (e.g. preprocessing only). */
119 static bool no_backend
;
121 /* Length of line when printing switch values. */
124 /* Name of program invoked, sans directories. */
126 const char *progname
;
128 /* Copy of argument vector to toplev_main. */
129 static const char **save_argv
;
131 /* Name of top-level original source file (what was input to cpp).
132 This comes from the #-command at the beginning of the actual input.
133 If there isn't any there, then this is the cc1 input file name. */
135 const char *main_input_filename
;
137 #ifndef USE_MAPPED_LOCATION
138 location_t unknown_location
= { NULL
, 0 };
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_VALUE 2
145 /* Current position in real source file. */
147 location_t input_location
;
149 struct line_maps line_table
;
151 /* Stack of currently pending input files. */
153 struct file_stack
*input_file_stack
;
155 /* Incremented on each change to input_file_stack. */
156 int input_file_stack_tick
;
158 /* Record of input_file_stack at each tick. */
159 typedef struct file_stack
*fs_p
;
161 DEF_VEC_ALLOC_P(fs_p
,heap
);
162 static VEC(fs_p
,heap
) *input_file_stack_history
;
164 /* Whether input_file_stack has been restored to a previous state (in
165 which case there should be no more pushing). */
166 static bool input_file_stack_restored
;
168 /* Name to use as base of names for dump output files. */
170 const char *dump_base_name
;
172 /* Name to use as a base for auxiliary output files. */
174 const char *aux_base_name
;
176 /* Bit flags that specify the machine subtype we are compiling for.
177 Bits are tested using macros TARGET_... defined in the tm.h file
178 and set by `-m...' switches. Must be defined in rtlanal.c. */
180 extern int target_flags
;
182 /* A mask of target_flags that includes bit X if X was set or cleared
183 on the command line. */
185 int target_flags_explicit
;
187 /* Debug hooks - dependent upon command line options. */
189 const struct gcc_debug_hooks
*debug_hooks
;
191 /* Debug hooks - target default. */
193 static const struct gcc_debug_hooks
*default_debug_hooks
;
195 /* Other flags saying which kinds of debugging dump have been requested. */
197 int rtl_dump_and_exit
;
198 int flag_print_asm_name
;
199 enum graph_dump_types graph_dump_format
;
201 /* Name for output file of assembly code, specified with -o. */
203 const char *asm_file_name
;
205 /* Nonzero means do optimizations. -O.
206 Particular numeric values stand for particular amounts of optimization;
207 thus, -O2 stores 2 here. However, the optimizations beyond the basic
208 ones are not controlled directly by this variable. Instead, they are
209 controlled by individual `flag_...' variables that are defaulted
210 based on this variable. */
214 /* Nonzero means optimize for size. -Os.
215 The only valid values are zero and nonzero. When optimize_size is
216 nonzero, optimize defaults to 2, but certain individual code
217 bloating optimizations are disabled. */
219 int optimize_size
= 0;
221 /* The FUNCTION_DECL for the function currently being compiled,
222 or 0 if between functions. */
223 tree current_function_decl
;
225 /* Set to the FUNC_BEGIN label of the current function, or NULL
227 const char * current_function_func_begin_label
;
229 /* Temporarily suppress certain warnings.
230 This is set while reading code from a system header file. */
232 int in_system_header
= 0;
234 /* Nonzero means to collect statistics which might be expensive
235 and to print them when we are done. */
236 int flag_detailed_statistics
= 0;
238 /* A random sequence of characters, unless overridden by user. */
239 static const char *flag_random_seed
;
241 /* A local time stamp derived from the time of compilation. It will be
242 zero if the system cannot provide a time. It will be -1u, if the
243 user has specified a particular random seed. */
248 /* Nonzero means `char' should be signed. */
250 int flag_signed_char
;
252 /* Nonzero means give an enum type only as many bytes as it needs. A value
253 of 2 means it has not yet been initialized. */
255 int flag_short_enums
;
257 /* Nonzero if structures and unions should be returned in memory.
259 This should only be defined if compatibility with another compiler or
260 with an ABI is needed, because it results in slower code. */
262 #ifndef DEFAULT_PCC_STRUCT_RETURN
263 #define DEFAULT_PCC_STRUCT_RETURN 1
266 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
268 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
270 /* 0 means straightforward implementation of complex divide acceptable.
271 1 means wide ranges of inputs must work for complex divide.
272 2 means C99-like requirements for complex multiply and divide. */
274 int flag_complex_method
= 1;
276 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
277 not just because the tree inliner turned us off. */
279 int flag_really_no_inline
= 2;
281 /* Nonzero means we should be saving declaration info into a .X file. */
283 int flag_gen_aux_info
= 0;
285 /* Specified name of aux-info file. */
287 const char *aux_info_file_name
;
289 /* Nonzero if we are compiling code for a shared library, zero for
294 /* Generate code for GNU or NeXT Objective-C runtime environment. */
296 #ifdef NEXT_OBJC_RUNTIME
297 int flag_next_runtime
= 1;
299 int flag_next_runtime
= 0;
302 /* Set to the default thread-local storage (tls) model to use. */
304 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
306 /* Nonzero means change certain warnings into errors.
307 Usually these are warnings about failure to conform to some standard. */
309 int flag_pedantic_errors
= 0;
311 /* -dA causes debug commentary information to be produced in
312 the generated assembly code (to make it more readable). This option
313 is generally only of use to those who actually need to read the
314 generated assembly code (perhaps while debugging the compiler itself).
315 Currently, this switch is only used by dwarfout.c; however, it is intended
316 to be a catchall for printing debug information in the assembler file. */
318 int flag_debug_asm
= 0;
320 /* -dP causes the rtl to be emitted as a comment in assembly. */
322 int flag_dump_rtl_in_asm
= 0;
324 /* When non-NULL, indicates that whenever space is allocated on the
325 stack, the resulting stack pointer must not pass this
326 address---that is, for stacks that grow downward, the stack pointer
327 must always be greater than or equal to this address; for stacks
328 that grow upward, the stack pointer must be less than this address.
329 At present, the rtx may be either a REG or a SYMBOL_REF, although
330 the support provided depends on the backend. */
333 /* Nonzero if we should track variables. When
334 flag_var_tracking == AUTODETECT_VALUE it will be set according
335 to optimize, debug_info_level and debug_hooks in process_options (). */
336 int flag_var_tracking
= AUTODETECT_VALUE
;
338 /* True if the user has tagged the function with the 'section'
341 bool user_defined_section_attribute
= false;
343 /* Values of the -falign-* flags: how much to align labels in code.
344 0 means `use default', 1 means `don't align'.
345 For each variable, there is an _log variant which is the power
346 of two not less than the variable, for .align output. */
349 int align_loops_max_skip
;
351 int align_jumps_max_skip
;
352 int align_labels_log
;
353 int align_labels_max_skip
;
354 int align_functions_log
;
358 const char *const string
;
362 lang_independent_options
;
364 /* Nonzero if subexpressions must be evaluated from left-to-right. */
365 int flag_evaluation_order
= 0;
367 /* The user symbol prefix after having resolved same. */
368 const char *user_label_prefix
;
370 static const param_info lang_independent_params
[] = {
371 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
372 { OPTION, DEFAULT, false, MIN, MAX, HELP },
373 #include "params.def"
375 { NULL
, 0, false, 0, 0, NULL
}
378 /* Output files for assembler code (real compiler output)
379 and debugging dumps. */
383 FILE *dump_file
= NULL
;
384 const char *dump_file_name
;
386 /* The current working directory of a translation. It's generally the
387 directory from which compilation was initiated, but a preprocessed
388 file may specify the original directory in which it was
391 static const char *src_pwd
;
393 /* Initialize src_pwd with the given string, and return true. If it
394 was already initialized, return false. As a special case, it may
395 be called with a NULL argument to test whether src_pwd has NOT been
399 set_src_pwd (const char *pwd
)
403 if (strcmp (src_pwd
, pwd
) == 0)
409 src_pwd
= xstrdup (pwd
);
413 /* Return the directory from which the translation unit was initiated,
414 in case set_src_pwd() was not called before to assign it a
430 /* Called when the start of a function definition is parsed,
431 this function prints on stderr the name of the function. */
433 announce_function (tree decl
)
437 if (rtl_dump_and_exit
)
438 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
440 fprintf (stderr
, " %s", lang_hooks
.decl_printable_name (decl
, 2));
442 pp_needs_newline (global_dc
->printer
) = true;
443 diagnostic_set_last_function (global_dc
);
447 /* Initialize local_tick with the time of day, or -1 if
448 flag_random_seed is set. */
451 init_local_tick (void)
453 if (!flag_random_seed
)
455 /* Get some more or less random data. */
456 #ifdef HAVE_GETTIMEOFDAY
460 gettimeofday (&tv
, NULL
);
461 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
465 time_t now
= time (NULL
);
467 if (now
!= (time_t)-1)
468 local_tick
= (unsigned) now
;
476 /* Set up a default flag_random_seed and local_tick, unless the user
477 already specified one. Must be called after init_local_tick. */
480 init_random_seed (void)
482 unsigned HOST_WIDE_INT value
;
483 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
485 value
= local_tick
^ getpid ();
487 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
488 flag_random_seed
= random_seed
;
491 /* Obtain the random_seed string. Unless NOINIT, initialize it if
492 it's not provided in the command line. */
495 get_random_seed (bool noinit
)
497 if (!flag_random_seed
&& !noinit
)
499 return flag_random_seed
;
502 /* Modify the random_seed string to VAL. Return its previous
506 set_random_seed (const char *val
)
508 const char *old
= flag_random_seed
;
509 flag_random_seed
= val
;
513 /* Decode the string P as an integral parameter.
514 If the string is indeed an integer return its numeric value else
515 issue an Invalid Option error for the option PNAME and return DEFVAL.
516 If PNAME is zero just return DEFVAL, do not call error. */
519 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
521 const char *endp
= p
;
534 error ("invalid option argument %qs", pname
);
541 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
542 for floor_log2 and exact_log2; see toplev.h. That construct, however,
543 conflicts with the ISO C++ One Definition Rule. */
545 #if GCC_VERSION < 3004 || !defined (__cplusplus)
547 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
548 If X is 0, return -1. */
551 floor_log2 (unsigned HOST_WIDE_INT x
)
559 t
= HOST_BITS_PER_WIDE_INT
- 1 - (int) CLZ_HWI (x
);
561 if (HOST_BITS_PER_WIDE_INT
> 64)
562 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
564 if (HOST_BITS_PER_WIDE_INT
> 32)
565 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
567 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
569 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
571 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
573 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
575 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
582 /* Return the logarithm of X, base 2, considering X unsigned,
583 if X is a power of 2. Otherwise, returns -1. */
586 exact_log2 (unsigned HOST_WIDE_INT x
)
591 return x
? CTZ_HWI (x
) : -1;
593 return floor_log2 (x
);
597 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
599 /* Handler for fatal signals, such as SIGSEGV. These are transformed
600 into ICE messages, which is much more user friendly. In case the
601 error printer crashes, reset the signal to prevent infinite recursion. */
604 crash_signal (int signo
)
606 signal (signo
, SIG_DFL
);
608 /* If we crashed while processing an ASM statement, then be a little more
609 graceful. It's most likely the user's fault. */
610 if (this_is_asm_operands
)
612 output_operand_lossage ("unrecoverable error");
613 exit (FATAL_EXIT_CODE
);
616 internal_error ("%s", strsignal (signo
));
619 /* Arrange to dump core on error. (The regular error message is still
620 printed first, except in the case of abort().) */
623 setup_core_dumping (void)
626 signal (SIGABRT
, SIG_DFL
);
628 #if defined(HAVE_SETRLIMIT)
631 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
632 fatal_error ("getting core file size maximum limit: %m");
633 rlim
.rlim_cur
= rlim
.rlim_max
;
634 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
635 fatal_error ("setting core file size limit to maximum: %m");
638 diagnostic_abort_on_error (global_dc
);
642 /* Strip off a legitimate source ending from the input string NAME of
643 length LEN. Rather than having to know the names used by all of
644 our front ends, we strip off an ending of a period followed by
645 up to five characters. (Java uses ".class".) */
648 strip_off_ending (char *name
, int len
)
651 for (i
= 2; i
< 6 && len
> i
; i
++)
653 if (name
[len
- i
] == '.')
655 name
[len
- i
] = '\0';
661 /* Output a quoted string. */
664 output_quoted_string (FILE *asm_file
, const char *string
)
666 #ifdef OUTPUT_QUOTED_STRING
667 OUTPUT_QUOTED_STRING (asm_file
, string
);
671 putc ('\"', asm_file
);
672 while ((c
= *string
++) != 0)
676 if (c
== '\"' || c
== '\\')
677 putc ('\\', asm_file
);
681 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
683 putc ('\"', asm_file
);
687 /* Output a file name in the form wanted by System V. */
690 output_file_directive (FILE *asm_file
, const char *input_name
)
695 if (input_name
== NULL
)
696 input_name
= "<stdin>";
698 input_name
= remap_debug_filename (input_name
);
700 len
= strlen (input_name
);
701 na
= input_name
+ len
;
703 /* NA gets INPUT_NAME sans directory names. */
704 while (na
> input_name
)
706 if (IS_DIR_SEPARATOR (na
[-1]))
711 #ifdef ASM_OUTPUT_SOURCE_FILENAME
712 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
714 fprintf (asm_file
, "\t.file\t");
715 output_quoted_string (asm_file
, na
);
716 fputc ('\n', asm_file
);
720 /* A subroutine of wrapup_global_declarations. We've come to the end of
721 the compilation unit. All deferred variables should be undeferred,
722 and all incomplete decls should be finalized. */
725 wrapup_global_declaration_1 (tree decl
)
727 /* We're not deferring this any longer. Assignment is conditional to
728 avoid needlessly dirtying PCH pages. */
729 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
730 && DECL_DEFER_OUTPUT (decl
) != 0)
731 DECL_DEFER_OUTPUT (decl
) = 0;
733 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
734 lang_hooks
.finish_incomplete_decl (decl
);
737 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
738 needs to be output. Return true if it is output. */
741 wrapup_global_declaration_2 (tree decl
)
743 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
746 /* Don't write out static consts, unless we still need them.
748 We also keep static consts if not optimizing (for debugging),
749 unless the user specified -fno-keep-static-consts.
750 ??? They might be better written into the debug information.
751 This is possible when using DWARF.
753 A language processor that wants static constants to be always
754 written out (even if it is not used) is responsible for
755 calling rest_of_decl_compilation itself. E.g. the C front-end
756 calls rest_of_decl_compilation from finish_decl.
757 One motivation for this is that is conventional in some
758 environments to write things like:
759 static const char rcsid[] = "... version string ...";
760 intending to force the string to be in the executable.
762 A language processor that would prefer to have unneeded
763 static constants "optimized away" would just defer writing
764 them out until here. E.g. C++ does this, because static
765 constants are often defined in header files.
767 ??? A tempting alternative (for both C and C++) would be
768 to force a constant to be written if and only if it is
769 defined in a main file, as opposed to an include file. */
771 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
773 struct varpool_node
*node
;
775 node
= varpool_node (decl
);
779 else if (node
->alias
)
781 else if (!cgraph_global_info_ready
783 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
785 else if (node
->needed
)
787 else if (DECL_COMDAT (decl
))
789 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
790 && (optimize
|| !flag_keep_static_consts
791 || DECL_ARTIFICIAL (decl
)))
796 rest_of_decl_compilation (decl
, 1, 1);
804 /* Do any final processing required for the declarations in VEC, of
805 which there are LEN. We write out inline functions and variables
806 that have been deferred until this point, but which are required.
807 Returns nonzero if anything was put out. */
810 wrapup_global_declarations (tree
*vec
, int len
)
812 bool reconsider
, output_something
= false;
815 for (i
= 0; i
< len
; i
++)
816 wrapup_global_declaration_1 (vec
[i
]);
818 /* Now emit any global variables or functions that we have been
819 putting off. We need to loop in case one of the things emitted
820 here references another one which comes earlier in the list. */
824 for (i
= 0; i
< len
; i
++)
825 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
827 output_something
= true;
831 return output_something
;
834 /* A subroutine of check_global_declarations. Issue appropriate warnings
835 for the global declaration DECL. */
838 check_global_declaration_1 (tree decl
)
840 /* Warn about any function declared static but not defined. We don't
841 warn about variables, because many programs have static variables
842 that exist only to get some text into the object file. */
843 if (TREE_CODE (decl
) == FUNCTION_DECL
844 && DECL_INITIAL (decl
) == 0
845 && DECL_EXTERNAL (decl
)
846 && ! DECL_ARTIFICIAL (decl
)
847 && ! TREE_NO_WARNING (decl
)
848 && ! TREE_PUBLIC (decl
)
849 && (warn_unused_function
850 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
852 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
853 pedwarn ("%q+F used but never defined", decl
);
855 warning (0, "%q+F declared %<static%> but never defined", decl
);
856 /* This symbol is effectively an "extern" declaration now. */
857 TREE_PUBLIC (decl
) = 1;
858 assemble_external (decl
);
861 /* Warn about static fns or vars defined but not used. */
862 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
863 /* We don't warn about "static const" variables because the
864 "rcs_id" idiom uses that construction. */
865 || (warn_unused_variable
866 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
867 && ! DECL_IN_SYSTEM_HEADER (decl
)
868 && ! TREE_USED (decl
)
869 /* The TREE_USED bit for file-scope decls is kept in the identifier,
870 to handle multiple external decls in different scopes. */
871 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
872 && ! DECL_EXTERNAL (decl
)
873 && ! TREE_PUBLIC (decl
)
874 /* A volatile variable might be used in some non-obvious way. */
875 && ! TREE_THIS_VOLATILE (decl
)
876 /* Global register variables must be declared to reserve them. */
877 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
878 /* Otherwise, ask the language. */
879 && lang_hooks
.decls
.warn_unused_global (decl
))
880 warning (0, "%q+D defined but not used", decl
);
883 /* Issue appropriate warnings for the global declarations in VEC (of
884 which there are LEN). */
887 check_global_declarations (tree
*vec
, int len
)
891 for (i
= 0; i
< len
; i
++)
892 check_global_declaration_1 (vec
[i
]);
895 /* Emit debugging information for all global declarations in VEC. */
898 emit_debug_global_declarations (tree
*vec
, int len
)
902 /* Avoid confusing the debug information machinery when there are errors. */
903 if (errorcount
!= 0 || sorrycount
!= 0)
906 timevar_push (TV_SYMOUT
);
907 for (i
= 0; i
< len
; i
++)
908 debug_hooks
->global_decl (vec
[i
]);
909 timevar_pop (TV_SYMOUT
);
912 /* Warn about a use of an identifier which was marked deprecated. */
914 warn_deprecated_use (tree node
)
916 if (node
== 0 || !warn_deprecated_decl
)
921 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
922 warning (OPT_Wdeprecated_declarations
,
923 "%qD is deprecated (declared at %s:%d)",
924 node
, xloc
.file
, xloc
.line
);
926 else if (TYPE_P (node
))
928 const char *what
= NULL
;
929 tree decl
= TYPE_STUB_DECL (node
);
931 if (TYPE_NAME (node
))
933 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
934 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
935 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
936 && DECL_NAME (TYPE_NAME (node
)))
937 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
942 expanded_location xloc
943 = expand_location (DECL_SOURCE_LOCATION (decl
));
945 warning (OPT_Wdeprecated_declarations
,
946 "%qs is deprecated (declared at %s:%d)", what
,
947 xloc
.file
, xloc
.line
);
949 warning (OPT_Wdeprecated_declarations
,
950 "type is deprecated (declared at %s:%d)",
951 xloc
.file
, xloc
.line
);
956 warning (OPT_Wdeprecated_declarations
, "%qs is deprecated", what
);
958 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
963 /* Save the current INPUT_LOCATION on the top entry in the
964 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
965 INPUT_LOCATION accordingly. */
968 #ifdef USE_MAPPED_LOCATION
969 push_srcloc (location_t fline
)
971 push_srcloc (const char *file
, int line
)
974 struct file_stack
*fs
;
976 gcc_assert (!input_file_stack_restored
);
977 if (input_file_stack_tick
== (int) ((1U << INPUT_FILE_STACK_BITS
) - 1))
978 sorry ("GCC supports only %d input file changes", input_file_stack_tick
);
980 fs
= XNEW (struct file_stack
);
981 fs
->location
= input_location
;
982 fs
->next
= input_file_stack
;
983 #ifdef USE_MAPPED_LOCATION
984 input_location
= fline
;
986 input_filename
= file
;
989 input_file_stack
= fs
;
990 input_file_stack_tick
++;
991 VEC_safe_push (fs_p
, heap
, input_file_stack_history
, input_file_stack
);
994 /* Pop the top entry off the stack of presently open source files.
995 Restore the INPUT_LOCATION from the new topmost entry on the
1001 struct file_stack
*fs
;
1003 gcc_assert (!input_file_stack_restored
);
1004 if (input_file_stack_tick
== (int) ((1U << INPUT_FILE_STACK_BITS
) - 1))
1005 sorry ("GCC supports only %d input file changes", input_file_stack_tick
);
1007 fs
= input_file_stack
;
1008 input_location
= fs
->location
;
1009 input_file_stack
= fs
->next
;
1010 input_file_stack_tick
++;
1011 VEC_safe_push (fs_p
, heap
, input_file_stack_history
, input_file_stack
);
1014 /* Restore the input file stack to its state as of TICK, for the sake
1015 of diagnostics after processing the whole input. Once this has
1016 been called, push_srcloc and pop_srcloc may no longer be
1019 restore_input_file_stack (int tick
)
1022 input_file_stack
= NULL
;
1024 input_file_stack
= VEC_index (fs_p
, input_file_stack_history
, tick
- 1);
1025 input_file_stack_tick
= tick
;
1026 input_file_stack_restored
= true;
1029 /* Compile an entire translation unit. Write a file of assembly
1030 output and various debugging dumps. */
1035 /* Initialize yet another pass. */
1038 init_final (main_input_filename
);
1039 coverage_init (aux_base_name
);
1041 timevar_push (TV_PARSE
);
1043 /* Call the parser, which parses the entire file (calling
1044 rest_of_compilation for each function). */
1045 lang_hooks
.parse_file (set_yydebug
);
1047 /* In case there were missing block closers,
1048 get us back to the global binding level. */
1049 lang_hooks
.clear_binding_stack ();
1051 /* Compilation is now finished except for writing
1052 what's left of the symbol table output. */
1053 timevar_pop (TV_PARSE
);
1055 if (flag_syntax_only
)
1058 lang_hooks
.decls
.final_write_globals ();
1060 if (errorcount
|| sorrycount
)
1063 varpool_assemble_pending_decls ();
1064 finish_aliases_2 ();
1066 /* This must occur after the loop to output deferred functions.
1067 Else the coverage initializer would not be emitted if all the
1068 functions in this compilation unit were deferred. */
1071 /* Likewise for mudflap static object registrations. */
1073 mudflap_finish_file ();
1075 /* Likewise for emulated thread-local storage. */
1076 if (!targetm
.have_tls
)
1079 output_shared_constant_pool ();
1080 output_object_blocks ();
1082 /* Write out any pending weak symbol declarations. */
1085 /* Do dbx symbols. */
1086 timevar_push (TV_SYMOUT
);
1088 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1089 if (dwarf2out_do_frame ())
1090 dwarf2out_frame_finish ();
1093 (*debug_hooks
->finish
) (main_input_filename
);
1094 timevar_pop (TV_SYMOUT
);
1096 /* Output some stuff at end of file if nec. */
1098 dw2_output_indirect_constants ();
1100 /* Flush any pending external directives. */
1101 process_pending_assemble_externals ();
1103 /* Attach a special .ident directive to the end of the file to identify
1104 the version of GCC which compiled this code. The format of the .ident
1105 string is patterned after the ones produced by native SVR4 compilers. */
1109 const char *pkg_version
= "(GNU) ";
1111 if (strcmp ("(GCC) ", pkgversion_string
))
1112 pkg_version
= pkgversion_string
;
1113 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
1114 IDENT_ASM_OP
, pkg_version
, version_string
);
1118 /* This must be at the end. Some target ports emit end of file directives
1119 into the assembly file here, and hence we can not output anything to the
1120 assembly file after this point. */
1121 targetm
.asm_out
.file_end ();
1124 /* Parse a -d... command line switch. */
1127 decode_d_option (const char *arg
)
1138 flag_print_asm_name
= 1;
1141 flag_dump_rtl_in_asm
= 1;
1142 flag_print_asm_name
= 1;
1145 graph_dump_format
= vcg
;
1148 rtl_dump_and_exit
= 1;
1153 case 'D': /* These are handled by the preprocessor. */
1157 setup_core_dumping();
1162 if (!enable_rtl_dump_file (c
))
1163 warning (0, "unrecognized gcc debugging option: %c", c
);
1168 /* Indexed by enum debug_info_type. */
1169 const char *const debug_type_names
[] =
1171 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1174 /* Print version information to FILE.
1175 Each line begins with INDENT (for the case where FILE is the
1176 assembler output file). */
1179 print_version (FILE *file
, const char *indent
)
1181 static const char fmt1
[] =
1183 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1185 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1188 static const char fmt2
[] =
1189 N_("GMP version %s, MPFR version %s.\n");
1190 static const char fmt3
[] =
1191 N_("warning: %s header version %s differs from library version %s.\n");
1192 static const char fmt4
[] =
1193 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1195 #define __VERSION__ "[?]"
1198 file
== stderr
? _(fmt1
) : fmt1
,
1199 indent
, *indent
!= 0 ? " " : "",
1200 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
1201 indent
, __VERSION__
);
1203 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1204 two string formats, "i.j.k" and "i.j" when k is zero. */
1205 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1206 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1207 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1208 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1209 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1211 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1212 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1213 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1216 file
== stderr
? _(fmt2
) : fmt2
,
1217 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
);
1218 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
1220 file
== stderr
? _(fmt3
) : fmt3
,
1221 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
1222 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
1224 file
== stderr
? _(fmt3
) : fmt3
,
1225 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
1227 file
== stderr
? _(fmt4
) : fmt4
,
1228 indent
, *indent
!= 0 ? " " : "",
1229 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1232 #ifdef ASM_COMMENT_START
1234 print_to_asm_out_file (print_switch_type type
, const char * text
)
1236 bool prepend_sep
= true;
1240 case SWITCH_TYPE_LINE_END
:
1241 putc ('\n', asm_out_file
);
1244 case SWITCH_TYPE_LINE_START
:
1245 fputs (ASM_COMMENT_START
, asm_out_file
);
1246 return strlen (ASM_COMMENT_START
);
1248 case SWITCH_TYPE_DESCRIPTIVE
:
1249 if (ASM_COMMENT_START
[0] == 0)
1250 prepend_sep
= false;
1252 case SWITCH_TYPE_PASSED
:
1253 case SWITCH_TYPE_ENABLED
:
1255 fputc (' ', asm_out_file
);
1256 fprintf (asm_out_file
, text
);
1257 /* No need to return the length here as
1258 print_single_switch has already done it. */
1268 print_to_stderr (print_switch_type type
, const char * text
)
1272 case SWITCH_TYPE_LINE_END
:
1273 putc ('\n', stderr
);
1276 case SWITCH_TYPE_LINE_START
:
1279 case SWITCH_TYPE_PASSED
:
1280 case SWITCH_TYPE_ENABLED
:
1281 fputc (' ', stderr
);
1284 case SWITCH_TYPE_DESCRIPTIVE
:
1285 fprintf (stderr
, text
);
1286 /* No need to return the length here as
1287 print_single_switch has already done it. */
1295 /* Print an option value and return the adjusted position in the line.
1296 ??? print_fn doesn't handle errors, eg disk full; presumably other
1297 code will catch a disk full though. */
1300 print_single_switch (print_switch_fn_type print_fn
,
1302 print_switch_type type
,
1305 /* The ultrix fprintf returns 0 on success, so compute the result
1306 we want here since we need it for the following test. The +1
1307 is for the separator character that will probably be emitted. */
1308 int len
= strlen (text
) + 1;
1311 && pos
+ len
> MAX_LINE
)
1313 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1318 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
1320 print_fn (type
, text
);
1324 /* Print active target switches using PRINT_FN.
1325 POS is the current cursor position and MAX is the size of a "line".
1326 Each line begins with INDENT and ends with TERM.
1327 Each switch is separated from the next by SEP. */
1330 print_switch_values (print_switch_fn_type print_fn
)
1336 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1337 that it can be printed below. This helps reproducibility. */
1338 if (!flag_random_seed
)
1339 init_random_seed ();
1341 /* Print the options as passed. */
1342 pos
= print_single_switch (print_fn
, pos
,
1343 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
1345 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1350 if (strcmp (*p
, "-o") == 0
1351 || strcmp (*p
, "-dumpbase") == 0
1352 || strcmp (*p
, "-auxbase") == 0)
1359 if (strcmp (*p
, "-quiet") == 0
1360 || strcmp (*p
, "-version") == 0)
1367 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
, *p
);
1371 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1373 /* Print the -f and -m options that have been enabled.
1374 We don't handle language specific options but printing argv
1376 pos
= print_single_switch (print_fn
, 0,
1377 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
1379 for (j
= 0; j
< cl_options_count
; j
++)
1380 if ((cl_options
[j
].flags
& CL_REPORT
)
1381 && option_enabled (j
) > 0)
1382 pos
= print_single_switch (print_fn
, pos
,
1383 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
1385 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1388 /* Open assembly code output file. Do this even if -fsyntax-only is
1389 on, because then the driver will have provided the name of a
1390 temporary file or bit bucket for us. NAME is the file specified on
1391 the command line, possibly NULL. */
1393 init_asm_output (const char *name
)
1395 if (name
== NULL
&& asm_file_name
== 0)
1396 asm_out_file
= stdout
;
1399 if (asm_file_name
== 0)
1401 int len
= strlen (dump_base_name
);
1402 char *dumpname
= XNEWVEC (char, len
+ 6);
1404 memcpy (dumpname
, dump_base_name
, len
+ 1);
1405 strip_off_ending (dumpname
, len
);
1406 strcat (dumpname
, ".s");
1407 asm_file_name
= dumpname
;
1409 if (!strcmp (asm_file_name
, "-"))
1410 asm_out_file
= stdout
;
1412 asm_out_file
= fopen (asm_file_name
, "w+b");
1413 if (asm_out_file
== 0)
1414 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1417 if (!flag_syntax_only
)
1419 targetm
.asm_out
.file_start ();
1421 if (flag_record_gcc_switches
)
1423 if (targetm
.asm_out
.record_gcc_switches
)
1425 /* Let the target know that we are about to start recording. */
1426 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1428 /* Now record the switches. */
1429 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1430 /* Let the target know that the recording is over. */
1431 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1435 inform ("-frecord-gcc-switches is not supported by the current target");
1438 #ifdef ASM_COMMENT_START
1439 if (flag_verbose_asm
)
1441 /* Print the list of switches in effect
1442 into the assembler file as comments. */
1443 print_version (asm_out_file
, ASM_COMMENT_START
);
1444 print_switch_values (print_to_asm_out_file
);
1445 fprintf (asm_out_file
, "\n");
1451 /* Return true if the state of option OPTION should be stored in PCH files
1452 and checked by default_pch_valid_p. Store the option's current state
1456 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1458 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1460 if (cl_options
[option
].flag_var
== &target_flags
)
1461 if (targetm
.check_pch_target_flags
)
1463 return get_option_state (option
, state
);
1466 /* Default version of get_pch_validity.
1467 By default, every flag difference is fatal; that will be mostly right for
1468 most targets, but completely right for very few. */
1471 default_get_pch_validity (size_t *len
)
1473 struct cl_option_state state
;
1478 if (targetm
.check_pch_target_flags
)
1479 *len
+= sizeof (target_flags
);
1480 for (i
= 0; i
< cl_options_count
; i
++)
1481 if (option_affects_pch_p (i
, &state
))
1484 result
= r
= XNEWVEC (char, *len
);
1488 if (targetm
.check_pch_target_flags
)
1490 memcpy (r
, &target_flags
, sizeof (target_flags
));
1491 r
+= sizeof (target_flags
);
1494 for (i
= 0; i
< cl_options_count
; i
++)
1495 if (option_affects_pch_p (i
, &state
))
1497 memcpy (r
, state
.data
, state
.size
);
1504 /* Return a message which says that a PCH file was created with a different
1505 setting of OPTION. */
1508 pch_option_mismatch (const char *option
)
1512 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1514 return _("out of memory");
1518 /* Default version of pch_valid_p. */
1521 default_pch_valid_p (const void *data_p
, size_t len
)
1523 struct cl_option_state state
;
1524 const char *data
= (const char *)data_p
;
1527 /* -fpic and -fpie also usually make a PCH invalid. */
1528 if (data
[0] != flag_pic
)
1529 return _("created and used with different settings of -fpic");
1530 if (data
[1] != flag_pie
)
1531 return _("created and used with different settings of -fpie");
1534 /* Check target_flags. */
1535 if (targetm
.check_pch_target_flags
)
1540 memcpy (&tf
, data
, sizeof (target_flags
));
1541 data
+= sizeof (target_flags
);
1542 len
-= sizeof (target_flags
);
1543 r
= targetm
.check_pch_target_flags (tf
);
1548 for (i
= 0; i
< cl_options_count
; i
++)
1549 if (option_affects_pch_p (i
, &state
))
1551 if (memcmp (data
, state
.data
, state
.size
) != 0)
1552 return pch_option_mismatch (cl_options
[i
].opt_text
);
1560 /* Default tree printer. Handles declarations only. */
1562 default_tree_printer (pretty_printer
* pp
, text_info
*text
, const char *spec
,
1563 int precision
, bool wide
, bool set_locus
, bool hash
)
1567 /* FUTURE: %+x should set the locus. */
1568 if (precision
!= 0 || wide
|| hash
)
1574 t
= va_arg (*text
->args_ptr
, tree
);
1575 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1576 t
= DECL_DEBUG_EXPR (t
);
1581 t
= va_arg (*text
->args_ptr
, tree
);
1588 if (set_locus
&& text
->locus
)
1589 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1593 const char *n
= DECL_NAME (t
)
1594 ? lang_hooks
.decl_printable_name (t
, 2)
1599 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1604 /* Initialization of the front end environment, before command line
1605 options are parsed. Signal handlers, internationalization etc.
1606 ARGV0 is main's argv[0]. */
1608 general_init (const char *argv0
)
1612 p
= argv0
+ strlen (argv0
);
1613 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1617 xmalloc_set_program_name (progname
);
1621 /* Unlock the stdio streams. */
1622 unlock_std_streams ();
1624 gcc_init_libintl ();
1626 /* Initialize the diagnostics reporting machinery, so option parsing
1627 can give warnings and errors. */
1628 diagnostic_initialize (global_dc
);
1629 /* Set a default printer. Language specific initializations will
1630 override it later. */
1631 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1633 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1635 signal (SIGSEGV
, crash_signal
);
1638 signal (SIGILL
, crash_signal
);
1641 signal (SIGBUS
, crash_signal
);
1644 signal (SIGABRT
, crash_signal
);
1646 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1647 signal (SIGIOT
, crash_signal
);
1650 signal (SIGFPE
, crash_signal
);
1653 /* Other host-specific signal setup. */
1654 (*host_hooks
.extra_signals
)();
1656 /* Initialize the garbage-collector, string pools and tree type hash
1660 linemap_init (&line_table
);
1663 /* Initialize register usage now so switches may override. */
1666 /* Register the language-independent parameters. */
1667 add_params (lang_independent_params
, LAST_PARAM
);
1669 /* This must be done after add_params but before argument processing. */
1670 init_ggc_heuristics();
1671 init_optimization_passes ();
1674 /* Return true if the current target supports -fsection-anchors. */
1677 target_supports_section_anchors_p (void)
1679 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1682 if (targetm
.asm_out
.output_anchor
== NULL
)
1688 /* Default the align_* variables to 1 if they're still unset, and
1689 set up the align_*_log variables. */
1691 init_alignments (void)
1693 if (align_loops
<= 0)
1695 if (align_loops_max_skip
> align_loops
)
1696 align_loops_max_skip
= align_loops
- 1;
1697 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1698 if (align_jumps
<= 0)
1700 if (align_jumps_max_skip
> align_jumps
)
1701 align_jumps_max_skip
= align_jumps
- 1;
1702 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1703 if (align_labels
<= 0)
1705 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1706 if (align_labels_max_skip
> align_labels
)
1707 align_labels_max_skip
= align_labels
- 1;
1708 if (align_functions
<= 0)
1709 align_functions
= 1;
1710 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1713 /* Process the options that have been parsed. */
1715 process_options (void)
1717 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1718 This can happen with incorrect pre-processed input. */
1719 debug_hooks
= &do_nothing_debug_hooks
;
1721 /* Allow the front end to perform consistency checks and do further
1722 initialization based on the command line options. This hook also
1723 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1724 so we can correctly initialize debug output. */
1725 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1726 #ifndef USE_MAPPED_LOCATION
1727 input_filename
= main_input_filename
;
1730 #ifdef OVERRIDE_OPTIONS
1731 /* Some machines may reject certain combinations of options. */
1735 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1737 warning (OPT_fsection_anchors
,
1738 "this target does not support %qs", "-fsection-anchors");
1739 flag_section_anchors
= 0;
1742 if (flag_short_enums
== 2)
1743 flag_short_enums
= targetm
.default_short_enums ();
1745 /* Set aux_base_name if not already set. */
1748 else if (main_input_filename
)
1750 char *name
= xstrdup (lbasename (main_input_filename
));
1752 strip_off_ending (name
, strlen (name
));
1753 aux_base_name
= name
;
1756 aux_base_name
= "gccaux";
1758 /* Unrolling all loops implies that standard loop unrolling must also
1760 if (flag_unroll_all_loops
)
1761 flag_unroll_loops
= 1;
1763 /* The loop unrolling code assumes that cse will be run after loop.
1764 web and rename-registers also help when run after loop unrolling. */
1766 if (flag_rerun_cse_after_loop
== AUTODETECT_VALUE
)
1767 flag_rerun_cse_after_loop
= flag_unroll_loops
|| flag_peel_loops
;
1768 if (flag_web
== AUTODETECT_VALUE
)
1769 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1770 if (flag_rename_registers
== AUTODETECT_VALUE
)
1771 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1773 if (flag_non_call_exceptions
)
1774 flag_asynchronous_unwind_tables
= 1;
1775 if (flag_asynchronous_unwind_tables
)
1776 flag_unwind_tables
= 1;
1778 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1780 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
1781 flag_unit_at_a_time
= 0;
1783 if (!flag_unit_at_a_time
)
1784 flag_section_anchors
= 0;
1786 if (flag_value_profile_transformations
)
1787 flag_profile_values
= 1;
1789 /* Warn about options that are not supported on this machine. */
1790 #ifndef INSN_SCHEDULING
1791 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1792 warning (0, "instruction scheduling not supported on this target machine");
1795 if (flag_delayed_branch
)
1796 warning (0, "this target machine does not have delayed branches");
1799 user_label_prefix
= USER_LABEL_PREFIX
;
1800 if (flag_leading_underscore
!= -1)
1802 /* If the default prefix is more complicated than "" or "_",
1803 issue a warning and ignore this option. */
1804 if (user_label_prefix
[0] == 0 ||
1805 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1807 user_label_prefix
= flag_leading_underscore
? "_" : "";
1810 warning (0, "-f%sleading-underscore not supported on this target machine",
1811 flag_leading_underscore
? "" : "no-");
1814 /* If we are in verbose mode, write out the version and maybe all the
1815 option flags in use. */
1818 print_version (stderr
, "");
1820 print_switch_values (print_to_stderr
);
1823 if (flag_syntax_only
)
1825 write_symbols
= NO_DEBUG
;
1829 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1831 if (debug_info_level
== DINFO_LEVEL_NONE
)
1832 write_symbols
= NO_DEBUG
;
1834 /* Now we know write_symbols, set up the debug hooks based on it.
1835 By default we do nothing for debug output. */
1836 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1837 default_debug_hooks
= &do_nothing_debug_hooks
;
1838 #if defined(DBX_DEBUGGING_INFO)
1839 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1840 default_debug_hooks
= &dbx_debug_hooks
;
1842 #if defined(XCOFF_DEBUGGING_INFO)
1843 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1844 default_debug_hooks
= &xcoff_debug_hooks
;
1846 #ifdef SDB_DEBUGGING_INFO
1847 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1848 default_debug_hooks
= &sdb_debug_hooks
;
1850 #ifdef DWARF2_DEBUGGING_INFO
1851 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1852 default_debug_hooks
= &dwarf2_debug_hooks
;
1854 #ifdef VMS_DEBUGGING_INFO
1855 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1856 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1857 default_debug_hooks
= &vmsdbg_debug_hooks
;
1860 if (write_symbols
== NO_DEBUG
)
1862 #if defined(DBX_DEBUGGING_INFO)
1863 else if (write_symbols
== DBX_DEBUG
)
1864 debug_hooks
= &dbx_debug_hooks
;
1866 #if defined(XCOFF_DEBUGGING_INFO)
1867 else if (write_symbols
== XCOFF_DEBUG
)
1868 debug_hooks
= &xcoff_debug_hooks
;
1870 #ifdef SDB_DEBUGGING_INFO
1871 else if (write_symbols
== SDB_DEBUG
)
1872 debug_hooks
= &sdb_debug_hooks
;
1874 #ifdef DWARF2_DEBUGGING_INFO
1875 else if (write_symbols
== DWARF2_DEBUG
)
1876 debug_hooks
= &dwarf2_debug_hooks
;
1878 #ifdef VMS_DEBUGGING_INFO
1879 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1880 debug_hooks
= &vmsdbg_debug_hooks
;
1883 error ("target system does not support the \"%s\" debug format",
1884 debug_type_names
[write_symbols
]);
1886 /* Now we know which debug output will be used so we can set
1887 flag_var_tracking, flag_rename_registers if the user has
1888 not specified them. */
1889 if (debug_info_level
< DINFO_LEVEL_NORMAL
1890 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1892 if (flag_var_tracking
== 1
1893 || flag_var_tracking_uninit
== 1)
1895 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1896 warning (0, "variable tracking requested, but useless unless "
1897 "producing debug info");
1899 warning (0, "variable tracking requested, but not supported "
1900 "by this debug format");
1902 flag_var_tracking
= 0;
1903 flag_var_tracking_uninit
= 0;
1906 if (flag_rename_registers
== AUTODETECT_VALUE
)
1907 flag_rename_registers
= default_debug_hooks
->var_location
1908 != do_nothing_debug_hooks
.var_location
;
1910 if (flag_var_tracking
== AUTODETECT_VALUE
)
1911 flag_var_tracking
= optimize
>= 1;
1913 /* If the user specifically requested variable tracking with tagging
1914 uninitialized variables, we need to turn on variable tracking.
1915 (We already determined above that variable tracking is feasible.) */
1916 if (flag_var_tracking_uninit
)
1917 flag_var_tracking
= 1;
1919 /* If auxiliary info generation is desired, open the output file.
1920 This goes in the same directory as the source file--unlike
1921 all the other output files. */
1922 if (flag_gen_aux_info
)
1924 aux_info_file
= fopen (aux_info_file_name
, "w");
1925 if (aux_info_file
== 0)
1926 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1929 if (! targetm
.have_named_sections
)
1931 if (flag_function_sections
)
1933 warning (0, "-ffunction-sections not supported for this target");
1934 flag_function_sections
= 0;
1936 if (flag_data_sections
)
1938 warning (0, "-fdata-sections not supported for this target");
1939 flag_data_sections
= 0;
1943 if (flag_function_sections
&& profile_flag
)
1945 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1946 flag_function_sections
= 0;
1949 #ifndef HAVE_prefetch
1950 if (flag_prefetch_loop_arrays
)
1952 warning (0, "-fprefetch-loop-arrays not supported for this target");
1953 flag_prefetch_loop_arrays
= 0;
1956 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1958 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1959 flag_prefetch_loop_arrays
= 0;
1963 /* This combination of options isn't handled for i386 targets and doesn't
1964 make much sense anyway, so don't allow it. */
1965 if (flag_prefetch_loop_arrays
&& optimize_size
)
1967 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1968 flag_prefetch_loop_arrays
= 0;
1971 #ifndef OBJECT_FORMAT_ELF
1972 #ifndef OBJECT_FORMAT_MACHO
1973 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1974 warning (0, "-ffunction-sections may affect debugging on some targets");
1978 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1979 if (flag_signaling_nans
)
1980 flag_trapping_math
= 1;
1982 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1983 if (flag_cx_limited_range
)
1984 flag_complex_method
= 0;
1986 /* Targets must be able to place spill slots at lower addresses. If the
1987 target already uses a soft frame pointer, the transition is trivial. */
1988 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1990 warning (0, "-fstack-protector not supported for this target");
1991 flag_stack_protect
= 0;
1993 if (!flag_stack_protect
)
1994 warn_stack_protect
= 0;
1996 /* ??? Unwind info is not correct around the CFG unless either a frame
1997 pointer is present or A_O_A is set. Fixing this requires rewriting
1998 unwind info generation to be aware of the CFG and propagating states
2000 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
2001 && flag_omit_frame_pointer
)
2003 warning (0, "unwind tables currently requires a frame pointer "
2005 flag_omit_frame_pointer
= 0;
2009 /* This function can be called multiple times to reinitialize the compiler
2010 back end when register classes or instruction sets have changed,
2011 before each function. */
2013 backend_init_target (void)
2015 /* Initialize alignment variables. */
2018 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2019 to initialize reg_raw_mode[]. */
2022 /* This invokes target hooks to set fixed_reg[] etc, which is
2026 /* This depends on stack_pointer_rtx. */
2027 init_fake_stack_mems ();
2029 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2031 init_alias_target ();
2033 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2036 /* The following initialization functions need to generate rtl, so
2037 provide a dummy function context for them. */
2038 init_dummy_function_start ();
2040 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2041 on a mode change. */
2044 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2045 after a mode change as well. */
2046 if (flag_caller_saves
)
2047 init_caller_save ();
2048 expand_dummy_function_end ();
2051 /* Initialize the compiler back end. This function is called only once,
2052 when starting the compiler. */
2056 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2057 || debug_info_level
== DINFO_LEVEL_VERBOSE
2058 #ifdef VMS_DEBUGGING_INFO
2059 /* Enable line number info for traceback. */
2060 || debug_info_level
> DINFO_LEVEL_NONE
2062 || flag_test_coverage
);
2065 init_inline_once ();
2066 init_varasm_once ();
2067 save_register_info ();
2069 /* Initialize the target-specific back end pieces. */
2070 backend_init_target ();
2073 /* Initialize things that are both lang-dependent and target-dependent.
2074 This function can be called more than once if target parameters change. */
2076 lang_dependent_init_target (void)
2078 /* This creates various _DECL nodes, so needs to be called after the
2079 front end is initialized. It also depends on the HAVE_xxx macros
2080 generated from the target machine description. */
2083 /* The following initialization functions need to generate rtl, so
2084 provide a dummy function context for them. */
2085 init_dummy_function_start ();
2087 /* Do the target-specific parts of expr initialization. */
2088 init_expr_target ();
2090 /* Although the actions of init_set_costs are language-independent,
2091 it uses optabs, so we cannot call it from backend_init. */
2094 expand_dummy_function_end ();
2097 /* Language-dependent initialization. Returns nonzero on success. */
2099 lang_dependent_init (const char *name
)
2101 location_t save_loc
= input_location
;
2102 if (dump_base_name
== 0)
2103 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
2105 /* Other front-end initialization. */
2106 #ifdef USE_MAPPED_LOCATION
2107 input_location
= BUILTINS_LOCATION
;
2109 input_filename
= "<built-in>";
2112 if (lang_hooks
.init () == 0)
2114 input_location
= save_loc
;
2116 init_asm_output (name
);
2118 /* This creates various _DECL nodes, so needs to be called after the
2119 front end is initialized. */
2122 /* Do the target-specific parts of the initialization. */
2123 lang_dependent_init_target ();
2125 /* If dbx symbol table desired, initialize writing it and output the
2126 predefined types. */
2127 timevar_push (TV_SYMOUT
);
2129 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2130 if (dwarf2out_do_frame ())
2131 dwarf2out_frame_init ();
2134 /* Now we have the correct original filename, we can initialize
2136 (*debug_hooks
->init
) (name
);
2138 timevar_pop (TV_SYMOUT
);
2144 /* Reinitialize everything when target parameters, such as register usage,
2147 target_reinit (void)
2149 /* Reinitialise RTL backend. */
2150 backend_init_target ();
2152 /* Reinitialize lang-dependent parts. */
2153 lang_dependent_init_target ();
2157 dump_memory_report (bool final
)
2159 ggc_print_statistics ();
2160 stringpool_statistics ();
2161 dump_tree_statistics ();
2162 dump_rtx_statistics ();
2163 dump_varray_statistics ();
2164 dump_alloc_pool_statistics ();
2165 dump_bitmap_statistics ();
2166 dump_ggc_loc_statistics (final
);
2169 /* Clean up: close opened files, etc. */
2174 /* Close the dump files. */
2175 if (flag_gen_aux_info
)
2177 fclose (aux_info_file
);
2179 unlink (aux_info_file_name
);
2182 /* Close non-debugging input and output files. Take special care to note
2183 whether fclose returns an error, since the pages might still be on the
2184 buffer chain while the file is open. */
2188 if (ferror (asm_out_file
) != 0)
2189 fatal_error ("error writing to %s: %m", asm_file_name
);
2190 if (fclose (asm_out_file
) != 0)
2191 fatal_error ("error closing %s: %m", asm_file_name
);
2194 finish_optimization_passes ();
2197 dump_memory_report (true);
2199 /* Language-specific end of compilation actions. */
2200 lang_hooks
.finish ();
2203 /* Initialize the compiler, and compile the input file. */
2207 /* Initialize timing first. The C front ends read the main file in
2208 the post_options hook, and C++ does file timings. */
2209 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2211 timevar_start (TV_TOTAL
);
2215 /* Don't do any more if an error has already occurred. */
2218 /* This must be run always, because it is needed to compute the FP
2219 predefined macros, such as __LDBL_MAX__, for targets using non
2220 default FP formats. */
2221 init_adjust_machine_modes ();
2223 /* Set up the back-end if requested. */
2227 /* Language-dependent initialization. Returns true on success. */
2228 if (lang_dependent_init (main_input_filename
))
2234 /* Stop timing and print the times. */
2235 timevar_stop (TV_TOTAL
);
2236 timevar_print (stderr
);
2239 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2240 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2241 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2243 It is not safe to call this function more than once. */
2246 toplev_main (unsigned int argc
, const char **argv
)
2250 /* Initialization of GCC's environment, and diagnostics. */
2251 general_init (argv
[0]);
2253 /* Parse the options and do minimal processing; basically just
2254 enough to default flags appropriately. */
2255 decode_options (argc
, argv
);
2259 /* Exit early if we can (e.g. -help). */
2260 if (!exit_after_options
)
2263 if (errorcount
|| sorrycount
)
2264 return (FATAL_EXIT_CODE
);
2266 return (SUCCESS_EXIT_CODE
);