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"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
87 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
88 #include "dwarf2out.h"
91 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
95 #ifdef SDB_DEBUGGING_INFO
99 #ifdef XCOFF_DEBUGGING_INFO
100 #include "xcoffout.h" /* Needed for external data
101 declarations for e.g. AIX 4.x. */
104 static void general_init (const char *);
105 static void do_compile (void);
106 static void process_options (void);
107 static void backend_init (void);
108 static int lang_dependent_init (const char *);
109 static void init_asm_output (const char *);
110 static void finalize (void);
112 static void crash_signal (int) ATTRIBUTE_NORETURN
;
113 static void setup_core_dumping (void);
114 static void compile_file (void);
116 /* Nonzero to dump debug info whilst parsing (-dy option). */
117 static int set_yydebug
;
119 /* True if we don't need a backend (e.g. preprocessing only). */
120 static bool no_backend
;
122 /* Length of line when printing switch values. */
125 /* Name of program invoked, sans directories. */
127 const char *progname
;
129 /* Copy of argument vector to toplev_main. */
130 static const char **save_argv
;
132 /* Name of top-level original source file (what was input to cpp).
133 This comes from the #-command at the beginning of the actual input.
134 If there isn't any there, then this is the cc1 input file name. */
136 const char *main_input_filename
;
138 #ifndef USE_MAPPED_LOCATION
139 location_t unknown_location
= { NULL
, 0 };
142 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
143 to optimize and default_debug_hooks in process_options (). */
144 #define AUTODETECT_VALUE 2
146 /* Current position in real source file. */
148 location_t input_location
;
150 struct line_maps line_table
;
152 /* Stack of currently pending input files. */
154 struct file_stack
*input_file_stack
;
156 /* Incremented on each change to input_file_stack. */
157 int input_file_stack_tick
;
159 /* Record of input_file_stack at each tick. */
160 typedef struct file_stack
*fs_p
;
162 DEF_VEC_ALLOC_P(fs_p
,heap
);
163 static VEC(fs_p
,heap
) *input_file_stack_history
;
165 /* Whether input_file_stack has been restored to a previous state (in
166 which case there should be no more pushing). */
167 static bool input_file_stack_restored
;
169 /* Name to use as base of names for dump output files. */
171 const char *dump_base_name
;
173 /* Name to use as a base for auxiliary output files. */
175 const char *aux_base_name
;
177 /* Bit flags that specify the machine subtype we are compiling for.
178 Bits are tested using macros TARGET_... defined in the tm.h file
179 and set by `-m...' switches. Must be defined in rtlanal.c. */
181 extern int target_flags
;
183 /* A mask of target_flags that includes bit X if X was set or cleared
184 on the command line. */
186 int target_flags_explicit
;
188 /* Debug hooks - dependent upon command line options. */
190 const struct gcc_debug_hooks
*debug_hooks
;
192 /* Debug hooks - target default. */
194 static const struct gcc_debug_hooks
*default_debug_hooks
;
196 /* Other flags saying which kinds of debugging dump have been requested. */
198 int rtl_dump_and_exit
;
199 int flag_print_asm_name
;
200 enum graph_dump_types graph_dump_format
;
202 /* Name for output file of assembly code, specified with -o. */
204 const char *asm_file_name
;
206 /* Nonzero means do optimizations. -O.
207 Particular numeric values stand for particular amounts of optimization;
208 thus, -O2 stores 2 here. However, the optimizations beyond the basic
209 ones are not controlled directly by this variable. Instead, they are
210 controlled by individual `flag_...' variables that are defaulted
211 based on this variable. */
215 /* Nonzero means optimize for size. -Os.
216 The only valid values are zero and nonzero. When optimize_size is
217 nonzero, optimize defaults to 2, but certain individual code
218 bloating optimizations are disabled. */
220 int optimize_size
= 0;
222 /* The FUNCTION_DECL for the function currently being compiled,
223 or 0 if between functions. */
224 tree current_function_decl
;
226 /* Set to the FUNC_BEGIN label of the current function, or NULL
228 const char * current_function_func_begin_label
;
230 /* Temporarily suppress certain warnings.
231 This is set while reading code from a system header file. */
233 int in_system_header
= 0;
235 /* Nonzero means to collect statistics which might be expensive
236 and to print them when we are done. */
237 int flag_detailed_statistics
= 0;
239 /* A random sequence of characters, unless overridden by user. */
240 static const char *flag_random_seed
;
242 /* A local time stamp derived from the time of compilation. It will be
243 zero if the system cannot provide a time. It will be -1u, if the
244 user has specified a particular random seed. */
249 /* Nonzero means `char' should be signed. */
251 int flag_signed_char
;
253 /* Nonzero means give an enum type only as many bytes as it needs. A value
254 of 2 means it has not yet been initialized. */
256 int flag_short_enums
;
258 /* Nonzero if structures and unions should be returned in memory.
260 This should only be defined if compatibility with another compiler or
261 with an ABI is needed, because it results in slower code. */
263 #ifndef DEFAULT_PCC_STRUCT_RETURN
264 #define DEFAULT_PCC_STRUCT_RETURN 1
267 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
269 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
271 /* 0 means straightforward implementation of complex divide acceptable.
272 1 means wide ranges of inputs must work for complex divide.
273 2 means C99-like requirements for complex multiply and divide. */
275 int flag_complex_method
= 1;
277 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
278 not just because the tree inliner turned us off. */
280 int flag_really_no_inline
= 2;
282 /* Nonzero means we should be saving declaration info into a .X file. */
284 int flag_gen_aux_info
= 0;
286 /* Specified name of aux-info file. */
288 const char *aux_info_file_name
;
290 /* Nonzero if we are compiling code for a shared library, zero for
295 /* Generate code for GNU or NeXT Objective-C runtime environment. */
297 #ifdef NEXT_OBJC_RUNTIME
298 int flag_next_runtime
= 1;
300 int flag_next_runtime
= 0;
303 /* Set to the default thread-local storage (tls) model to use. */
305 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
307 /* Set the default algorithm for the integrated register allocator. */
309 enum ira_algorithm flag_ira_algorithm
= IRA_ALGORITHM_REGIONAL
;
311 /* Set the default value for -fira-verbose. */
313 unsigned int flag_ira_verbose
= 5;
315 /* Nonzero means change certain warnings into errors.
316 Usually these are warnings about failure to conform to some standard. */
318 int flag_pedantic_errors
= 0;
320 /* -dA causes debug commentary information to be produced in
321 the generated assembly code (to make it more readable). This option
322 is generally only of use to those who actually need to read the
323 generated assembly code (perhaps while debugging the compiler itself).
324 Currently, this switch is only used by dwarfout.c; however, it is intended
325 to be a catchall for printing debug information in the assembler file. */
327 int flag_debug_asm
= 0;
329 /* -dP causes the rtl to be emitted as a comment in assembly. */
331 int flag_dump_rtl_in_asm
= 0;
333 /* When non-NULL, indicates that whenever space is allocated on the
334 stack, the resulting stack pointer must not pass this
335 address---that is, for stacks that grow downward, the stack pointer
336 must always be greater than or equal to this address; for stacks
337 that grow upward, the stack pointer must be less than this address.
338 At present, the rtx may be either a REG or a SYMBOL_REF, although
339 the support provided depends on the backend. */
342 /* Nonzero if we should track variables. When
343 flag_var_tracking == AUTODETECT_VALUE it will be set according
344 to optimize, debug_info_level and debug_hooks in process_options (). */
345 int flag_var_tracking
= AUTODETECT_VALUE
;
347 /* True if the user has tagged the function with the 'section'
350 bool user_defined_section_attribute
= false;
352 /* Values of the -falign-* flags: how much to align labels in code.
353 0 means `use default', 1 means `don't align'.
354 For each variable, there is an _log variant which is the power
355 of two not less than the variable, for .align output. */
358 int align_loops_max_skip
;
360 int align_jumps_max_skip
;
361 int align_labels_log
;
362 int align_labels_max_skip
;
363 int align_functions_log
;
367 const char *const string
;
371 lang_independent_options
;
373 /* Nonzero if subexpressions must be evaluated from left-to-right. */
374 int flag_evaluation_order
= 0;
376 /* The user symbol prefix after having resolved same. */
377 const char *user_label_prefix
;
379 static const param_info lang_independent_params
[] = {
380 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
381 { OPTION, DEFAULT, false, MIN, MAX, HELP },
382 #include "params.def"
384 { NULL
, 0, false, 0, 0, NULL
}
387 /* Output files for assembler code (real compiler output)
388 and debugging dumps. */
392 FILE *dump_file
= NULL
;
393 const char *dump_file_name
;
395 /* The current working directory of a translation. It's generally the
396 directory from which compilation was initiated, but a preprocessed
397 file may specify the original directory in which it was
400 static const char *src_pwd
;
402 /* Initialize src_pwd with the given string, and return true. If it
403 was already initialized, return false. As a special case, it may
404 be called with a NULL argument to test whether src_pwd has NOT been
408 set_src_pwd (const char *pwd
)
412 if (strcmp (src_pwd
, pwd
) == 0)
418 src_pwd
= xstrdup (pwd
);
422 /* Return the directory from which the translation unit was initiated,
423 in case set_src_pwd() was not called before to assign it a
439 /* Called when the start of a function definition is parsed,
440 this function prints on stderr the name of the function. */
442 announce_function (tree decl
)
446 if (rtl_dump_and_exit
)
447 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
449 fprintf (stderr
, " %s", lang_hooks
.decl_printable_name (decl
, 2));
451 pp_needs_newline (global_dc
->printer
) = true;
452 diagnostic_set_last_function (global_dc
);
456 /* Initialize local_tick with the time of day, or -1 if
457 flag_random_seed is set. */
460 init_local_tick (void)
462 if (!flag_random_seed
)
464 /* Get some more or less random data. */
465 #ifdef HAVE_GETTIMEOFDAY
469 gettimeofday (&tv
, NULL
);
470 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
474 time_t now
= time (NULL
);
476 if (now
!= (time_t)-1)
477 local_tick
= (unsigned) now
;
485 /* Set up a default flag_random_seed and local_tick, unless the user
486 already specified one. Must be called after init_local_tick. */
489 init_random_seed (void)
491 unsigned HOST_WIDE_INT value
;
492 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
494 value
= local_tick
^ getpid ();
496 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
497 flag_random_seed
= random_seed
;
500 /* Obtain the random_seed string. Unless NOINIT, initialize it if
501 it's not provided in the command line. */
504 get_random_seed (bool noinit
)
506 if (!flag_random_seed
&& !noinit
)
508 return flag_random_seed
;
511 /* Modify the random_seed string to VAL. Return its previous
515 set_random_seed (const char *val
)
517 const char *old
= flag_random_seed
;
518 flag_random_seed
= val
;
522 /* Decode the string P as an integral parameter.
523 If the string is indeed an integer return its numeric value else
524 issue an Invalid Option error for the option PNAME and return DEFVAL.
525 If PNAME is zero just return DEFVAL, do not call error. */
528 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
530 const char *endp
= p
;
543 error ("invalid option argument %qs", pname
);
550 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
551 for floor_log2 and exact_log2; see toplev.h. That construct, however,
552 conflicts with the ISO C++ One Definition Rule. */
554 #if GCC_VERSION < 3004 || !defined (__cplusplus)
556 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
557 If X is 0, return -1. */
560 floor_log2 (unsigned HOST_WIDE_INT x
)
568 t
= HOST_BITS_PER_WIDE_INT
- 1 - (int) CLZ_HWI (x
);
570 if (HOST_BITS_PER_WIDE_INT
> 64)
571 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
573 if (HOST_BITS_PER_WIDE_INT
> 32)
574 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
576 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
578 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
580 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
582 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
584 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
591 /* Return the logarithm of X, base 2, considering X unsigned,
592 if X is a power of 2. Otherwise, returns -1. */
595 exact_log2 (unsigned HOST_WIDE_INT x
)
600 return x
? CTZ_HWI (x
) : -1;
602 return floor_log2 (x
);
606 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
608 /* Handler for fatal signals, such as SIGSEGV. These are transformed
609 into ICE messages, which is much more user friendly. In case the
610 error printer crashes, reset the signal to prevent infinite recursion. */
613 crash_signal (int signo
)
615 signal (signo
, SIG_DFL
);
617 /* If we crashed while processing an ASM statement, then be a little more
618 graceful. It's most likely the user's fault. */
619 if (this_is_asm_operands
)
621 output_operand_lossage ("unrecoverable error");
622 exit (FATAL_EXIT_CODE
);
625 internal_error ("%s", strsignal (signo
));
628 /* Arrange to dump core on error. (The regular error message is still
629 printed first, except in the case of abort().) */
632 setup_core_dumping (void)
635 signal (SIGABRT
, SIG_DFL
);
637 #if defined(HAVE_SETRLIMIT)
640 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
641 fatal_error ("getting core file size maximum limit: %m");
642 rlim
.rlim_cur
= rlim
.rlim_max
;
643 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
644 fatal_error ("setting core file size limit to maximum: %m");
647 diagnostic_abort_on_error (global_dc
);
651 /* Strip off a legitimate source ending from the input string NAME of
652 length LEN. Rather than having to know the names used by all of
653 our front ends, we strip off an ending of a period followed by
654 up to five characters. (Java uses ".class".) */
657 strip_off_ending (char *name
, int len
)
660 for (i
= 2; i
< 6 && len
> i
; i
++)
662 if (name
[len
- i
] == '.')
664 name
[len
- i
] = '\0';
670 /* Output a quoted string. */
673 output_quoted_string (FILE *asm_file
, const char *string
)
675 #ifdef OUTPUT_QUOTED_STRING
676 OUTPUT_QUOTED_STRING (asm_file
, string
);
680 putc ('\"', asm_file
);
681 while ((c
= *string
++) != 0)
685 if (c
== '\"' || c
== '\\')
686 putc ('\\', asm_file
);
690 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
692 putc ('\"', asm_file
);
696 /* Output a file name in the form wanted by System V. */
699 output_file_directive (FILE *asm_file
, const char *input_name
)
704 if (input_name
== NULL
)
705 input_name
= "<stdin>";
707 input_name
= remap_debug_filename (input_name
);
709 len
= strlen (input_name
);
710 na
= input_name
+ len
;
712 /* NA gets INPUT_NAME sans directory names. */
713 while (na
> input_name
)
715 if (IS_DIR_SEPARATOR (na
[-1]))
720 #ifdef ASM_OUTPUT_SOURCE_FILENAME
721 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
723 fprintf (asm_file
, "\t.file\t");
724 output_quoted_string (asm_file
, na
);
725 fputc ('\n', asm_file
);
729 /* A subroutine of wrapup_global_declarations. We've come to the end of
730 the compilation unit. All deferred variables should be undeferred,
731 and all incomplete decls should be finalized. */
734 wrapup_global_declaration_1 (tree decl
)
736 /* We're not deferring this any longer. Assignment is conditional to
737 avoid needlessly dirtying PCH pages. */
738 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
739 && DECL_DEFER_OUTPUT (decl
) != 0)
740 DECL_DEFER_OUTPUT (decl
) = 0;
742 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
743 lang_hooks
.finish_incomplete_decl (decl
);
746 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
747 needs to be output. Return true if it is output. */
750 wrapup_global_declaration_2 (tree decl
)
752 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
755 /* Don't write out static consts, unless we still need them.
757 We also keep static consts if not optimizing (for debugging),
758 unless the user specified -fno-keep-static-consts.
759 ??? They might be better written into the debug information.
760 This is possible when using DWARF.
762 A language processor that wants static constants to be always
763 written out (even if it is not used) is responsible for
764 calling rest_of_decl_compilation itself. E.g. the C front-end
765 calls rest_of_decl_compilation from finish_decl.
766 One motivation for this is that is conventional in some
767 environments to write things like:
768 static const char rcsid[] = "... version string ...";
769 intending to force the string to be in the executable.
771 A language processor that would prefer to have unneeded
772 static constants "optimized away" would just defer writing
773 them out until here. E.g. C++ does this, because static
774 constants are often defined in header files.
776 ??? A tempting alternative (for both C and C++) would be
777 to force a constant to be written if and only if it is
778 defined in a main file, as opposed to an include file. */
780 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
782 struct varpool_node
*node
;
784 node
= varpool_node (decl
);
788 else if (node
->alias
)
790 else if (!cgraph_global_info_ready
792 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
794 else if (node
->needed
)
796 else if (DECL_COMDAT (decl
))
798 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
799 && (optimize
|| !flag_keep_static_consts
800 || DECL_ARTIFICIAL (decl
)))
805 rest_of_decl_compilation (decl
, 1, 1);
813 /* Do any final processing required for the declarations in VEC, of
814 which there are LEN. We write out inline functions and variables
815 that have been deferred until this point, but which are required.
816 Returns nonzero if anything was put out. */
819 wrapup_global_declarations (tree
*vec
, int len
)
821 bool reconsider
, output_something
= false;
824 for (i
= 0; i
< len
; i
++)
825 wrapup_global_declaration_1 (vec
[i
]);
827 /* Now emit any global variables or functions that we have been
828 putting off. We need to loop in case one of the things emitted
829 here references another one which comes earlier in the list. */
833 for (i
= 0; i
< len
; i
++)
834 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
836 output_something
= true;
840 return output_something
;
843 /* A subroutine of check_global_declarations. Issue appropriate warnings
844 for the global declaration DECL. */
847 check_global_declaration_1 (tree decl
)
849 /* Warn about any function declared static but not defined. We don't
850 warn about variables, because many programs have static variables
851 that exist only to get some text into the object file. */
852 if (TREE_CODE (decl
) == FUNCTION_DECL
853 && DECL_INITIAL (decl
) == 0
854 && DECL_EXTERNAL (decl
)
855 && ! DECL_ARTIFICIAL (decl
)
856 && ! TREE_NO_WARNING (decl
)
857 && ! TREE_PUBLIC (decl
)
858 && (warn_unused_function
859 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
861 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
862 pedwarn ("%q+F used but never defined", decl
);
864 warning (0, "%q+F declared %<static%> but never defined", decl
);
865 /* This symbol is effectively an "extern" declaration now. */
866 TREE_PUBLIC (decl
) = 1;
867 assemble_external (decl
);
870 /* Warn about static fns or vars defined but not used. */
871 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
872 /* We don't warn about "static const" variables because the
873 "rcs_id" idiom uses that construction. */
874 || (warn_unused_variable
875 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
876 && ! DECL_IN_SYSTEM_HEADER (decl
)
877 && ! TREE_USED (decl
)
878 /* The TREE_USED bit for file-scope decls is kept in the identifier,
879 to handle multiple external decls in different scopes. */
880 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
881 && ! DECL_EXTERNAL (decl
)
882 && ! TREE_PUBLIC (decl
)
883 /* A volatile variable might be used in some non-obvious way. */
884 && ! TREE_THIS_VOLATILE (decl
)
885 /* Global register variables must be declared to reserve them. */
886 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
887 /* Otherwise, ask the language. */
888 && lang_hooks
.decls
.warn_unused_global (decl
))
889 warning (0, "%q+D defined but not used", decl
);
892 /* Issue appropriate warnings for the global declarations in VEC (of
893 which there are LEN). */
896 check_global_declarations (tree
*vec
, int len
)
900 for (i
= 0; i
< len
; i
++)
901 check_global_declaration_1 (vec
[i
]);
904 /* Emit debugging information for all global declarations in VEC. */
907 emit_debug_global_declarations (tree
*vec
, int len
)
911 /* Avoid confusing the debug information machinery when there are errors. */
912 if (errorcount
!= 0 || sorrycount
!= 0)
915 timevar_push (TV_SYMOUT
);
916 for (i
= 0; i
< len
; i
++)
917 debug_hooks
->global_decl (vec
[i
]);
918 timevar_pop (TV_SYMOUT
);
921 /* Warn about a use of an identifier which was marked deprecated. */
923 warn_deprecated_use (tree node
)
925 if (node
== 0 || !warn_deprecated_decl
)
930 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
931 warning (OPT_Wdeprecated_declarations
,
932 "%qD is deprecated (declared at %s:%d)",
933 node
, xloc
.file
, xloc
.line
);
935 else if (TYPE_P (node
))
937 const char *what
= NULL
;
938 tree decl
= TYPE_STUB_DECL (node
);
940 if (TYPE_NAME (node
))
942 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
943 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
944 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
945 && DECL_NAME (TYPE_NAME (node
)))
946 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
951 expanded_location xloc
952 = expand_location (DECL_SOURCE_LOCATION (decl
));
954 warning (OPT_Wdeprecated_declarations
,
955 "%qs is deprecated (declared at %s:%d)", what
,
956 xloc
.file
, xloc
.line
);
958 warning (OPT_Wdeprecated_declarations
,
959 "type is deprecated (declared at %s:%d)",
960 xloc
.file
, xloc
.line
);
965 warning (OPT_Wdeprecated_declarations
, "%qs is deprecated", what
);
967 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
972 /* Save the current INPUT_LOCATION on the top entry in the
973 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
974 INPUT_LOCATION accordingly. */
977 #ifdef USE_MAPPED_LOCATION
978 push_srcloc (location_t fline
)
980 push_srcloc (const char *file
, int line
)
983 struct file_stack
*fs
;
985 gcc_assert (!input_file_stack_restored
);
986 if (input_file_stack_tick
== (int) ((1U << INPUT_FILE_STACK_BITS
) - 1))
987 sorry ("GCC supports only %d input file changes", input_file_stack_tick
);
989 fs
= XNEW (struct file_stack
);
990 fs
->location
= input_location
;
991 fs
->next
= input_file_stack
;
992 #ifdef USE_MAPPED_LOCATION
993 input_location
= fline
;
995 input_filename
= file
;
998 input_file_stack
= fs
;
999 input_file_stack_tick
++;
1000 VEC_safe_push (fs_p
, heap
, input_file_stack_history
, input_file_stack
);
1003 /* Pop the top entry off the stack of presently open source files.
1004 Restore the INPUT_LOCATION from the new topmost entry on the
1010 struct file_stack
*fs
;
1012 gcc_assert (!input_file_stack_restored
);
1013 if (input_file_stack_tick
== (int) ((1U << INPUT_FILE_STACK_BITS
) - 1))
1014 sorry ("GCC supports only %d input file changes", input_file_stack_tick
);
1016 fs
= input_file_stack
;
1017 input_location
= fs
->location
;
1018 input_file_stack
= fs
->next
;
1019 input_file_stack_tick
++;
1020 VEC_safe_push (fs_p
, heap
, input_file_stack_history
, input_file_stack
);
1023 /* Restore the input file stack to its state as of TICK, for the sake
1024 of diagnostics after processing the whole input. Once this has
1025 been called, push_srcloc and pop_srcloc may no longer be
1028 restore_input_file_stack (int tick
)
1031 input_file_stack
= NULL
;
1033 input_file_stack
= VEC_index (fs_p
, input_file_stack_history
, tick
- 1);
1034 input_file_stack_tick
= tick
;
1035 input_file_stack_restored
= true;
1038 /* Compile an entire translation unit. Write a file of assembly
1039 output and various debugging dumps. */
1044 /* Initialize yet another pass. */
1047 init_final (main_input_filename
);
1048 coverage_init (aux_base_name
);
1050 timevar_push (TV_PARSE
);
1052 /* Call the parser, which parses the entire file (calling
1053 rest_of_compilation for each function). */
1054 lang_hooks
.parse_file (set_yydebug
);
1056 /* In case there were missing block closers,
1057 get us back to the global binding level. */
1058 lang_hooks
.clear_binding_stack ();
1060 /* Compilation is now finished except for writing
1061 what's left of the symbol table output. */
1062 timevar_pop (TV_PARSE
);
1064 if (flag_syntax_only
)
1067 lang_hooks
.decls
.final_write_globals ();
1069 if (errorcount
|| sorrycount
)
1072 varpool_assemble_pending_decls ();
1073 finish_aliases_2 ();
1075 /* This must occur after the loop to output deferred functions.
1076 Else the coverage initializer would not be emitted if all the
1077 functions in this compilation unit were deferred. */
1080 /* Likewise for mudflap static object registrations. */
1082 mudflap_finish_file ();
1084 /* Likewise for emulated thread-local storage. */
1085 if (!targetm
.have_tls
)
1088 output_shared_constant_pool ();
1089 output_object_blocks ();
1091 /* Write out any pending weak symbol declarations. */
1094 /* Do dbx symbols. */
1095 timevar_push (TV_SYMOUT
);
1097 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1098 if (dwarf2out_do_frame ())
1099 dwarf2out_frame_finish ();
1102 (*debug_hooks
->finish
) (main_input_filename
);
1103 timevar_pop (TV_SYMOUT
);
1105 /* Output some stuff at end of file if nec. */
1107 dw2_output_indirect_constants ();
1109 /* Flush any pending external directives. */
1110 process_pending_assemble_externals ();
1112 /* Attach a special .ident directive to the end of the file to identify
1113 the version of GCC which compiled this code. The format of the .ident
1114 string is patterned after the ones produced by native SVR4 compilers. */
1118 const char *pkg_version
= "(GNU) ";
1120 if (strcmp ("(GCC) ", pkgversion_string
))
1121 pkg_version
= pkgversion_string
;
1122 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
1123 IDENT_ASM_OP
, pkg_version
, version_string
);
1127 /* This must be at the end. Some target ports emit end of file directives
1128 into the assembly file here, and hence we can not output anything to the
1129 assembly file after this point. */
1130 targetm
.asm_out
.file_end ();
1133 /* Parse a -d... command line switch. */
1136 decode_d_option (const char *arg
)
1147 flag_print_asm_name
= 1;
1150 flag_dump_rtl_in_asm
= 1;
1151 flag_print_asm_name
= 1;
1154 graph_dump_format
= vcg
;
1157 rtl_dump_and_exit
= 1;
1162 case 'D': /* These are handled by the preprocessor. */
1166 setup_core_dumping();
1171 if (!enable_rtl_dump_file (c
))
1172 warning (0, "unrecognized gcc debugging option: %c", c
);
1177 /* Indexed by enum debug_info_type. */
1178 const char *const debug_type_names
[] =
1180 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1183 /* Print version information to FILE.
1184 Each line begins with INDENT (for the case where FILE is the
1185 assembler output file). */
1188 print_version (FILE *file
, const char *indent
)
1190 static const char fmt1
[] =
1192 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1194 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1197 static const char fmt2
[] =
1198 N_("GMP version %s, MPFR version %s.\n");
1199 static const char fmt3
[] =
1200 N_("warning: %s header version %s differs from library version %s.\n");
1201 static const char fmt4
[] =
1202 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1204 #define __VERSION__ "[?]"
1207 file
== stderr
? _(fmt1
) : fmt1
,
1208 indent
, *indent
!= 0 ? " " : "",
1209 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
1210 indent
, __VERSION__
);
1212 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1213 two string formats, "i.j.k" and "i.j" when k is zero. */
1214 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1215 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1216 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1217 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1218 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1220 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1221 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1222 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1225 file
== stderr
? _(fmt2
) : fmt2
,
1226 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
);
1227 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
1229 file
== stderr
? _(fmt3
) : fmt3
,
1230 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
1231 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
1233 file
== stderr
? _(fmt3
) : fmt3
,
1234 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
1236 file
== stderr
? _(fmt4
) : fmt4
,
1237 indent
, *indent
!= 0 ? " " : "",
1238 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1241 #ifdef ASM_COMMENT_START
1243 print_to_asm_out_file (print_switch_type type
, const char * text
)
1245 bool prepend_sep
= true;
1249 case SWITCH_TYPE_LINE_END
:
1250 putc ('\n', asm_out_file
);
1253 case SWITCH_TYPE_LINE_START
:
1254 fputs (ASM_COMMENT_START
, asm_out_file
);
1255 return strlen (ASM_COMMENT_START
);
1257 case SWITCH_TYPE_DESCRIPTIVE
:
1258 if (ASM_COMMENT_START
[0] == 0)
1259 prepend_sep
= false;
1261 case SWITCH_TYPE_PASSED
:
1262 case SWITCH_TYPE_ENABLED
:
1264 fputc (' ', asm_out_file
);
1265 fprintf (asm_out_file
, text
);
1266 /* No need to return the length here as
1267 print_single_switch has already done it. */
1277 print_to_stderr (print_switch_type type
, const char * text
)
1281 case SWITCH_TYPE_LINE_END
:
1282 putc ('\n', stderr
);
1285 case SWITCH_TYPE_LINE_START
:
1288 case SWITCH_TYPE_PASSED
:
1289 case SWITCH_TYPE_ENABLED
:
1290 fputc (' ', stderr
);
1293 case SWITCH_TYPE_DESCRIPTIVE
:
1294 fprintf (stderr
, text
);
1295 /* No need to return the length here as
1296 print_single_switch has already done it. */
1304 /* Print an option value and return the adjusted position in the line.
1305 ??? print_fn doesn't handle errors, eg disk full; presumably other
1306 code will catch a disk full though. */
1309 print_single_switch (print_switch_fn_type print_fn
,
1311 print_switch_type type
,
1314 /* The ultrix fprintf returns 0 on success, so compute the result
1315 we want here since we need it for the following test. The +1
1316 is for the separator character that will probably be emitted. */
1317 int len
= strlen (text
) + 1;
1320 && pos
+ len
> MAX_LINE
)
1322 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1327 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
1329 print_fn (type
, text
);
1333 /* Print active target switches using PRINT_FN.
1334 POS is the current cursor position and MAX is the size of a "line".
1335 Each line begins with INDENT and ends with TERM.
1336 Each switch is separated from the next by SEP. */
1339 print_switch_values (print_switch_fn_type print_fn
)
1345 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1346 that it can be printed below. This helps reproducibility. */
1347 if (!flag_random_seed
)
1348 init_random_seed ();
1350 /* Print the options as passed. */
1351 pos
= print_single_switch (print_fn
, pos
,
1352 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
1354 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1359 if (strcmp (*p
, "-o") == 0
1360 || strcmp (*p
, "-dumpbase") == 0
1361 || strcmp (*p
, "-auxbase") == 0)
1368 if (strcmp (*p
, "-quiet") == 0
1369 || strcmp (*p
, "-version") == 0)
1376 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
, *p
);
1380 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1382 /* Print the -f and -m options that have been enabled.
1383 We don't handle language specific options but printing argv
1385 pos
= print_single_switch (print_fn
, 0,
1386 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
1388 for (j
= 0; j
< cl_options_count
; j
++)
1389 if ((cl_options
[j
].flags
& CL_REPORT
)
1390 && option_enabled (j
) > 0)
1391 pos
= print_single_switch (print_fn
, pos
,
1392 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
1394 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1397 /* Open assembly code output file. Do this even if -fsyntax-only is
1398 on, because then the driver will have provided the name of a
1399 temporary file or bit bucket for us. NAME is the file specified on
1400 the command line, possibly NULL. */
1402 init_asm_output (const char *name
)
1404 if (name
== NULL
&& asm_file_name
== 0)
1405 asm_out_file
= stdout
;
1408 if (asm_file_name
== 0)
1410 int len
= strlen (dump_base_name
);
1411 char *dumpname
= XNEWVEC (char, len
+ 6);
1413 memcpy (dumpname
, dump_base_name
, len
+ 1);
1414 strip_off_ending (dumpname
, len
);
1415 strcat (dumpname
, ".s");
1416 asm_file_name
= dumpname
;
1418 if (!strcmp (asm_file_name
, "-"))
1419 asm_out_file
= stdout
;
1421 asm_out_file
= fopen (asm_file_name
, "w+b");
1422 if (asm_out_file
== 0)
1423 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1426 if (!flag_syntax_only
)
1428 targetm
.asm_out
.file_start ();
1430 if (flag_record_gcc_switches
)
1432 if (targetm
.asm_out
.record_gcc_switches
)
1434 /* Let the target know that we are about to start recording. */
1435 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1437 /* Now record the switches. */
1438 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1439 /* Let the target know that the recording is over. */
1440 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1444 inform ("-frecord-gcc-switches is not supported by the current target");
1447 #ifdef ASM_COMMENT_START
1448 if (flag_verbose_asm
)
1450 /* Print the list of switches in effect
1451 into the assembler file as comments. */
1452 print_version (asm_out_file
, ASM_COMMENT_START
);
1453 print_switch_values (print_to_asm_out_file
);
1454 fprintf (asm_out_file
, "\n");
1460 /* Return true if the state of option OPTION should be stored in PCH files
1461 and checked by default_pch_valid_p. Store the option's current state
1465 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1467 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1469 if (cl_options
[option
].flag_var
== &target_flags
)
1470 if (targetm
.check_pch_target_flags
)
1472 return get_option_state (option
, state
);
1475 /* Default version of get_pch_validity.
1476 By default, every flag difference is fatal; that will be mostly right for
1477 most targets, but completely right for very few. */
1480 default_get_pch_validity (size_t *len
)
1482 struct cl_option_state state
;
1487 if (targetm
.check_pch_target_flags
)
1488 *len
+= sizeof (target_flags
);
1489 for (i
= 0; i
< cl_options_count
; i
++)
1490 if (option_affects_pch_p (i
, &state
))
1493 result
= r
= XNEWVEC (char, *len
);
1497 if (targetm
.check_pch_target_flags
)
1499 memcpy (r
, &target_flags
, sizeof (target_flags
));
1500 r
+= sizeof (target_flags
);
1503 for (i
= 0; i
< cl_options_count
; i
++)
1504 if (option_affects_pch_p (i
, &state
))
1506 memcpy (r
, state
.data
, state
.size
);
1513 /* Return a message which says that a PCH file was created with a different
1514 setting of OPTION. */
1517 pch_option_mismatch (const char *option
)
1521 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1523 return _("out of memory");
1527 /* Default version of pch_valid_p. */
1530 default_pch_valid_p (const void *data_p
, size_t len
)
1532 struct cl_option_state state
;
1533 const char *data
= (const char *)data_p
;
1536 /* -fpic and -fpie also usually make a PCH invalid. */
1537 if (data
[0] != flag_pic
)
1538 return _("created and used with different settings of -fpic");
1539 if (data
[1] != flag_pie
)
1540 return _("created and used with different settings of -fpie");
1543 /* Check target_flags. */
1544 if (targetm
.check_pch_target_flags
)
1549 memcpy (&tf
, data
, sizeof (target_flags
));
1550 data
+= sizeof (target_flags
);
1551 len
-= sizeof (target_flags
);
1552 r
= targetm
.check_pch_target_flags (tf
);
1557 for (i
= 0; i
< cl_options_count
; i
++)
1558 if (option_affects_pch_p (i
, &state
))
1560 if (memcmp (data
, state
.data
, state
.size
) != 0)
1561 return pch_option_mismatch (cl_options
[i
].opt_text
);
1569 /* Default tree printer. Handles declarations only. */
1571 default_tree_printer (pretty_printer
* pp
, text_info
*text
, const char *spec
,
1572 int precision
, bool wide
, bool set_locus
, bool hash
)
1576 /* FUTURE: %+x should set the locus. */
1577 if (precision
!= 0 || wide
|| hash
)
1583 t
= va_arg (*text
->args_ptr
, tree
);
1584 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1585 t
= DECL_DEBUG_EXPR (t
);
1590 t
= va_arg (*text
->args_ptr
, tree
);
1597 if (set_locus
&& text
->locus
)
1598 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1602 const char *n
= DECL_NAME (t
)
1603 ? lang_hooks
.decl_printable_name (t
, 2)
1608 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1613 /* Initialization of the front end environment, before command line
1614 options are parsed. Signal handlers, internationalization etc.
1615 ARGV0 is main's argv[0]. */
1617 general_init (const char *argv0
)
1621 p
= argv0
+ strlen (argv0
);
1622 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1626 xmalloc_set_program_name (progname
);
1630 /* Unlock the stdio streams. */
1631 unlock_std_streams ();
1633 gcc_init_libintl ();
1635 /* Initialize the diagnostics reporting machinery, so option parsing
1636 can give warnings and errors. */
1637 diagnostic_initialize (global_dc
);
1638 /* Set a default printer. Language specific initializations will
1639 override it later. */
1640 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1642 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1644 signal (SIGSEGV
, crash_signal
);
1647 signal (SIGILL
, crash_signal
);
1650 signal (SIGBUS
, crash_signal
);
1653 signal (SIGABRT
, crash_signal
);
1655 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1656 signal (SIGIOT
, crash_signal
);
1659 signal (SIGFPE
, crash_signal
);
1662 /* Other host-specific signal setup. */
1663 (*host_hooks
.extra_signals
)();
1665 /* Initialize the garbage-collector, string pools and tree type hash
1669 linemap_init (&line_table
);
1672 /* Initialize register usage now so switches may override. */
1675 /* Register the language-independent parameters. */
1676 add_params (lang_independent_params
, LAST_PARAM
);
1678 /* This must be done after add_params but before argument processing. */
1679 init_ggc_heuristics();
1680 init_optimization_passes ();
1683 /* Return true if the current target supports -fsection-anchors. */
1686 target_supports_section_anchors_p (void)
1688 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1691 if (targetm
.asm_out
.output_anchor
== NULL
)
1697 /* Default the align_* variables to 1 if they're still unset, and
1698 set up the align_*_log variables. */
1700 init_alignments (void)
1702 if (align_loops
<= 0)
1704 if (align_loops_max_skip
> align_loops
)
1705 align_loops_max_skip
= align_loops
- 1;
1706 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1707 if (align_jumps
<= 0)
1709 if (align_jumps_max_skip
> align_jumps
)
1710 align_jumps_max_skip
= align_jumps
- 1;
1711 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1712 if (align_labels
<= 0)
1714 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1715 if (align_labels_max_skip
> align_labels
)
1716 align_labels_max_skip
= align_labels
- 1;
1717 if (align_functions
<= 0)
1718 align_functions
= 1;
1719 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1722 /* Process the options that have been parsed. */
1724 process_options (void)
1726 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1727 This can happen with incorrect pre-processed input. */
1728 debug_hooks
= &do_nothing_debug_hooks
;
1730 /* Allow the front end to perform consistency checks and do further
1731 initialization based on the command line options. This hook also
1732 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1733 so we can correctly initialize debug output. */
1734 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1735 #ifndef USE_MAPPED_LOCATION
1736 input_filename
= main_input_filename
;
1739 #ifdef OVERRIDE_OPTIONS
1740 /* Some machines may reject certain combinations of options. */
1744 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1746 warning (OPT_fsection_anchors
,
1747 "this target does not support %qs", "-fsection-anchors");
1748 flag_section_anchors
= 0;
1751 if (flag_short_enums
== 2)
1752 flag_short_enums
= targetm
.default_short_enums ();
1754 /* Set aux_base_name if not already set. */
1757 else if (main_input_filename
)
1759 char *name
= xstrdup (lbasename (main_input_filename
));
1761 strip_off_ending (name
, strlen (name
));
1762 aux_base_name
= name
;
1765 aux_base_name
= "gccaux";
1767 /* Unrolling all loops implies that standard loop unrolling must also
1769 if (flag_unroll_all_loops
)
1770 flag_unroll_loops
= 1;
1772 /* The loop unrolling code assumes that cse will be run after loop.
1773 web and rename-registers also help when run after loop unrolling. */
1775 if (flag_rerun_cse_after_loop
== AUTODETECT_VALUE
)
1776 flag_rerun_cse_after_loop
= flag_unroll_loops
|| flag_peel_loops
;
1777 if (flag_web
== AUTODETECT_VALUE
)
1778 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1779 if (flag_rename_registers
== AUTODETECT_VALUE
)
1780 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1782 if (flag_non_call_exceptions
)
1783 flag_asynchronous_unwind_tables
= 1;
1784 if (flag_asynchronous_unwind_tables
)
1785 flag_unwind_tables
= 1;
1787 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1789 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
1790 flag_unit_at_a_time
= 0;
1792 if (!flag_unit_at_a_time
)
1793 flag_section_anchors
= 0;
1795 if (flag_value_profile_transformations
)
1796 flag_profile_values
= 1;
1798 /* Warn about options that are not supported on this machine. */
1799 #ifndef INSN_SCHEDULING
1800 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1801 warning (0, "instruction scheduling not supported on this target machine");
1804 if (flag_delayed_branch
)
1805 warning (0, "this target machine does not have delayed branches");
1808 user_label_prefix
= USER_LABEL_PREFIX
;
1809 if (flag_leading_underscore
!= -1)
1811 /* If the default prefix is more complicated than "" or "_",
1812 issue a warning and ignore this option. */
1813 if (user_label_prefix
[0] == 0 ||
1814 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1816 user_label_prefix
= flag_leading_underscore
? "_" : "";
1819 warning (0, "-f%sleading-underscore not supported on this target machine",
1820 flag_leading_underscore
? "" : "no-");
1823 /* If we are in verbose mode, write out the version and maybe all the
1824 option flags in use. */
1827 print_version (stderr
, "");
1829 print_switch_values (print_to_stderr
);
1832 if (flag_syntax_only
)
1834 write_symbols
= NO_DEBUG
;
1838 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1840 if (debug_info_level
== DINFO_LEVEL_NONE
)
1841 write_symbols
= NO_DEBUG
;
1843 /* Now we know write_symbols, set up the debug hooks based on it.
1844 By default we do nothing for debug output. */
1845 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1846 default_debug_hooks
= &do_nothing_debug_hooks
;
1847 #if defined(DBX_DEBUGGING_INFO)
1848 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1849 default_debug_hooks
= &dbx_debug_hooks
;
1851 #if defined(XCOFF_DEBUGGING_INFO)
1852 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1853 default_debug_hooks
= &xcoff_debug_hooks
;
1855 #ifdef SDB_DEBUGGING_INFO
1856 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1857 default_debug_hooks
= &sdb_debug_hooks
;
1859 #ifdef DWARF2_DEBUGGING_INFO
1860 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1861 default_debug_hooks
= &dwarf2_debug_hooks
;
1863 #ifdef VMS_DEBUGGING_INFO
1864 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1865 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1866 default_debug_hooks
= &vmsdbg_debug_hooks
;
1869 if (write_symbols
== NO_DEBUG
)
1871 #if defined(DBX_DEBUGGING_INFO)
1872 else if (write_symbols
== DBX_DEBUG
)
1873 debug_hooks
= &dbx_debug_hooks
;
1875 #if defined(XCOFF_DEBUGGING_INFO)
1876 else if (write_symbols
== XCOFF_DEBUG
)
1877 debug_hooks
= &xcoff_debug_hooks
;
1879 #ifdef SDB_DEBUGGING_INFO
1880 else if (write_symbols
== SDB_DEBUG
)
1881 debug_hooks
= &sdb_debug_hooks
;
1883 #ifdef DWARF2_DEBUGGING_INFO
1884 else if (write_symbols
== DWARF2_DEBUG
)
1885 debug_hooks
= &dwarf2_debug_hooks
;
1887 #ifdef VMS_DEBUGGING_INFO
1888 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1889 debug_hooks
= &vmsdbg_debug_hooks
;
1892 error ("target system does not support the \"%s\" debug format",
1893 debug_type_names
[write_symbols
]);
1895 /* Now we know which debug output will be used so we can set
1896 flag_var_tracking, flag_rename_registers if the user has
1897 not specified them. */
1898 if (debug_info_level
< DINFO_LEVEL_NORMAL
1899 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1901 if (flag_var_tracking
== 1
1902 || flag_var_tracking_uninit
== 1)
1904 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1905 warning (0, "variable tracking requested, but useless unless "
1906 "producing debug info");
1908 warning (0, "variable tracking requested, but not supported "
1909 "by this debug format");
1911 flag_var_tracking
= 0;
1912 flag_var_tracking_uninit
= 0;
1915 if (flag_rename_registers
== AUTODETECT_VALUE
)
1916 flag_rename_registers
= default_debug_hooks
->var_location
1917 != do_nothing_debug_hooks
.var_location
;
1919 if (flag_var_tracking
== AUTODETECT_VALUE
)
1920 flag_var_tracking
= optimize
>= 1;
1922 /* If the user specifically requested variable tracking with tagging
1923 uninitialized variables, we need to turn on variable tracking.
1924 (We already determined above that variable tracking is feasible.) */
1925 if (flag_var_tracking_uninit
)
1926 flag_var_tracking
= 1;
1928 /* If auxiliary info generation is desired, open the output file.
1929 This goes in the same directory as the source file--unlike
1930 all the other output files. */
1931 if (flag_gen_aux_info
)
1933 aux_info_file
= fopen (aux_info_file_name
, "w");
1934 if (aux_info_file
== 0)
1935 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1938 if (! targetm
.have_named_sections
)
1940 if (flag_function_sections
)
1942 warning (0, "-ffunction-sections not supported for this target");
1943 flag_function_sections
= 0;
1945 if (flag_data_sections
)
1947 warning (0, "-fdata-sections not supported for this target");
1948 flag_data_sections
= 0;
1952 if (flag_function_sections
&& profile_flag
)
1954 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1955 flag_function_sections
= 0;
1958 #ifndef HAVE_prefetch
1959 if (flag_prefetch_loop_arrays
)
1961 warning (0, "-fprefetch-loop-arrays not supported for this target");
1962 flag_prefetch_loop_arrays
= 0;
1965 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1967 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1968 flag_prefetch_loop_arrays
= 0;
1972 /* This combination of options isn't handled for i386 targets and doesn't
1973 make much sense anyway, so don't allow it. */
1974 if (flag_prefetch_loop_arrays
&& optimize_size
)
1976 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1977 flag_prefetch_loop_arrays
= 0;
1980 #ifndef OBJECT_FORMAT_ELF
1981 #ifndef OBJECT_FORMAT_MACHO
1982 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1983 warning (0, "-ffunction-sections may affect debugging on some targets");
1987 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1988 if (flag_signaling_nans
)
1989 flag_trapping_math
= 1;
1991 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1992 if (flag_cx_limited_range
)
1993 flag_complex_method
= 0;
1995 /* Targets must be able to place spill slots at lower addresses. If the
1996 target already uses a soft frame pointer, the transition is trivial. */
1997 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1999 warning (0, "-fstack-protector not supported for this target");
2000 flag_stack_protect
= 0;
2002 if (!flag_stack_protect
)
2003 warn_stack_protect
= 0;
2005 /* ??? Unwind info is not correct around the CFG unless either a frame
2006 pointer is present or A_O_A is set. Fixing this requires rewriting
2007 unwind info generation to be aware of the CFG and propagating states
2009 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
2010 && flag_omit_frame_pointer
)
2012 warning (0, "unwind tables currently requires a frame pointer "
2014 flag_omit_frame_pointer
= 0;
2018 /* This function can be called multiple times to reinitialize the compiler
2019 back end when register classes or instruction sets have changed,
2020 before each function. */
2022 backend_init_target (void)
2024 /* Initialize alignment variables. */
2027 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2028 to initialize reg_raw_mode[]. */
2031 /* This invokes target hooks to set fixed_reg[] etc, which is
2035 /* This depends on stack_pointer_rtx. */
2036 init_fake_stack_mems ();
2038 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2040 init_alias_target ();
2042 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2045 /* The following initialization functions need to generate rtl, so
2046 provide a dummy function context for them. */
2047 init_dummy_function_start ();
2049 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2050 on a mode change. */
2053 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2054 after a mode change as well. */
2055 if (flag_caller_saves
)
2056 init_caller_save ();
2057 expand_dummy_function_end ();
2060 /* Initialize the compiler back end. This function is called only once,
2061 when starting the compiler. */
2065 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2066 || debug_info_level
== DINFO_LEVEL_VERBOSE
2067 #ifdef VMS_DEBUGGING_INFO
2068 /* Enable line number info for traceback. */
2069 || debug_info_level
> DINFO_LEVEL_NONE
2071 || flag_test_coverage
);
2074 init_inline_once ();
2075 init_varasm_once ();
2077 /* Initialize the target-specific back end pieces. */
2078 backend_init_target ();
2082 /* Initialize things that are both lang-dependent and target-dependent.
2083 This function can be called more than once if target parameters change. */
2085 lang_dependent_init_target (void)
2087 /* This creates various _DECL nodes, so needs to be called after the
2088 front end is initialized. It also depends on the HAVE_xxx macros
2089 generated from the target machine description. */
2092 /* The following initialization functions need to generate rtl, so
2093 provide a dummy function context for them. */
2094 init_dummy_function_start ();
2096 /* Do the target-specific parts of expr initialization. */
2097 init_expr_target ();
2099 /* Although the actions of init_set_costs are language-independent,
2100 it uses optabs, so we cannot call it from backend_init. */
2103 expand_dummy_function_end ();
2106 /* Language-dependent initialization. Returns nonzero on success. */
2108 lang_dependent_init (const char *name
)
2110 location_t save_loc
= input_location
;
2111 if (dump_base_name
== 0)
2112 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
2114 /* Other front-end initialization. */
2115 #ifdef USE_MAPPED_LOCATION
2116 input_location
= BUILTINS_LOCATION
;
2118 input_filename
= "<built-in>";
2121 if (lang_hooks
.init () == 0)
2123 input_location
= save_loc
;
2125 init_asm_output (name
);
2127 /* This creates various _DECL nodes, so needs to be called after the
2128 front end is initialized. */
2131 /* Do the target-specific parts of the initialization. */
2132 lang_dependent_init_target ();
2134 /* If dbx symbol table desired, initialize writing it and output the
2135 predefined types. */
2136 timevar_push (TV_SYMOUT
);
2138 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2139 if (dwarf2out_do_frame ())
2140 dwarf2out_frame_init ();
2143 /* Now we have the correct original filename, we can initialize
2145 (*debug_hooks
->init
) (name
);
2147 timevar_pop (TV_SYMOUT
);
2153 /* Reinitialize everything when target parameters, such as register usage,
2156 target_reinit (void)
2158 /* Reinitialise RTL backend. */
2159 backend_init_target ();
2161 /* Reinitialize lang-dependent parts. */
2162 lang_dependent_init_target ();
2166 dump_memory_report (bool final
)
2168 ggc_print_statistics ();
2169 stringpool_statistics ();
2170 dump_tree_statistics ();
2171 dump_rtx_statistics ();
2172 dump_varray_statistics ();
2173 dump_alloc_pool_statistics ();
2174 dump_bitmap_statistics ();
2175 dump_ggc_loc_statistics (final
);
2178 /* Clean up: close opened files, etc. */
2183 /* Close the dump files. */
2184 if (flag_gen_aux_info
)
2186 fclose (aux_info_file
);
2188 unlink (aux_info_file_name
);
2191 /* Close non-debugging input and output files. Take special care to note
2192 whether fclose returns an error, since the pages might still be on the
2193 buffer chain while the file is open. */
2197 if (ferror (asm_out_file
) != 0)
2198 fatal_error ("error writing to %s: %m", asm_file_name
);
2199 if (fclose (asm_out_file
) != 0)
2200 fatal_error ("error closing %s: %m", asm_file_name
);
2203 finish_optimization_passes ();
2208 dump_memory_report (true);
2210 /* Language-specific end of compilation actions. */
2211 lang_hooks
.finish ();
2214 /* Initialize the compiler, and compile the input file. */
2218 /* Initialize timing first. The C front ends read the main file in
2219 the post_options hook, and C++ does file timings. */
2220 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2222 timevar_start (TV_TOTAL
);
2226 /* Don't do any more if an error has already occurred. */
2229 /* This must be run always, because it is needed to compute the FP
2230 predefined macros, such as __LDBL_MAX__, for targets using non
2231 default FP formats. */
2232 init_adjust_machine_modes ();
2234 /* Set up the back-end if requested. */
2238 /* Language-dependent initialization. Returns true on success. */
2239 if (lang_dependent_init (main_input_filename
))
2245 /* Stop timing and print the times. */
2246 timevar_stop (TV_TOTAL
);
2247 timevar_print (stderr
);
2250 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2251 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2252 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2254 It is not safe to call this function more than once. */
2257 toplev_main (unsigned int argc
, const char **argv
)
2261 /* Initialization of GCC's environment, and diagnostics. */
2262 general_init (argv
[0]);
2264 /* Parse the options and do minimal processing; basically just
2265 enough to default flags appropriately. */
2266 decode_options (argc
, argv
);
2270 /* Exit early if we can (e.g. -help). */
2271 if (!exit_after_options
)
2274 if (errorcount
|| sorrycount
)
2275 return (FATAL_EXIT_CODE
);
2277 return (SUCCESS_EXIT_CODE
);