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 /* A mask of target_flags that includes bit X if X was set or cleared
177 on the command line. */
179 int target_flags_explicit
;
181 /* Debug hooks - dependent upon command line options. */
183 const struct gcc_debug_hooks
*debug_hooks
;
185 /* Debug hooks - target default. */
187 static const struct gcc_debug_hooks
*default_debug_hooks
;
189 /* Other flags saying which kinds of debugging dump have been requested. */
191 int rtl_dump_and_exit
;
192 int flag_print_asm_name
;
193 enum graph_dump_types graph_dump_format
;
195 /* Name for output file of assembly code, specified with -o. */
197 const char *asm_file_name
;
199 /* Nonzero means do optimizations. -O.
200 Particular numeric values stand for particular amounts of optimization;
201 thus, -O2 stores 2 here. However, the optimizations beyond the basic
202 ones are not controlled directly by this variable. Instead, they are
203 controlled by individual `flag_...' variables that are defaulted
204 based on this variable. */
208 /* Nonzero means optimize for size. -Os.
209 The only valid values are zero and nonzero. When optimize_size is
210 nonzero, optimize defaults to 2, but certain individual code
211 bloating optimizations are disabled. */
213 int optimize_size
= 0;
215 /* The FUNCTION_DECL for the function currently being compiled,
216 or 0 if between functions. */
217 tree current_function_decl
;
219 /* Set to the FUNC_BEGIN label of the current function, or NULL
221 const char * current_function_func_begin_label
;
223 /* Temporarily suppress certain warnings.
224 This is set while reading code from a system header file. */
226 int in_system_header
= 0;
228 /* Nonzero means to collect statistics which might be expensive
229 and to print them when we are done. */
230 int flag_detailed_statistics
= 0;
232 /* A random sequence of characters, unless overridden by user. */
233 static const char *flag_random_seed
;
235 /* A local time stamp derived from the time of compilation. It will be
236 zero if the system cannot provide a time. It will be -1u, if the
237 user has specified a particular random seed. */
242 /* Nonzero means `char' should be signed. */
244 int flag_signed_char
;
246 /* Nonzero means give an enum type only as many bytes as it needs. A value
247 of 2 means it has not yet been initialized. */
249 int flag_short_enums
;
251 /* Nonzero if structures and unions should be returned in memory.
253 This should only be defined if compatibility with another compiler or
254 with an ABI is needed, because it results in slower code. */
256 #ifndef DEFAULT_PCC_STRUCT_RETURN
257 #define DEFAULT_PCC_STRUCT_RETURN 1
260 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
262 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
264 /* 0 means straightforward implementation of complex divide acceptable.
265 1 means wide ranges of inputs must work for complex divide.
266 2 means C99-like requirements for complex multiply and divide. */
268 int flag_complex_method
= 1;
270 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
271 not just because the tree inliner turned us off. */
273 int flag_really_no_inline
= 2;
275 /* Nonzero means we should be saving declaration info into a .X file. */
277 int flag_gen_aux_info
= 0;
279 /* Specified name of aux-info file. */
281 const char *aux_info_file_name
;
283 /* Nonzero if we are compiling code for a shared library, zero for
288 /* Generate code for GNU or NeXT Objective-C runtime environment. */
290 #ifdef NEXT_OBJC_RUNTIME
291 int flag_next_runtime
= 1;
293 int flag_next_runtime
= 0;
296 /* Set to the default thread-local storage (tls) model to use. */
298 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
300 /* Nonzero means change certain warnings into errors.
301 Usually these are warnings about failure to conform to some standard. */
303 int flag_pedantic_errors
= 0;
305 /* -dA causes debug commentary information to be produced in
306 the generated assembly code (to make it more readable). This option
307 is generally only of use to those who actually need to read the
308 generated assembly code (perhaps while debugging the compiler itself).
309 Currently, this switch is only used by dwarfout.c; however, it is intended
310 to be a catchall for printing debug information in the assembler file. */
312 int flag_debug_asm
= 0;
314 /* -dP causes the rtl to be emitted as a comment in assembly. */
316 int flag_dump_rtl_in_asm
= 0;
318 /* When non-NULL, indicates that whenever space is allocated on the
319 stack, the resulting stack pointer must not pass this
320 address---that is, for stacks that grow downward, the stack pointer
321 must always be greater than or equal to this address; for stacks
322 that grow upward, the stack pointer must be less than this address.
323 At present, the rtx may be either a REG or a SYMBOL_REF, although
324 the support provided depends on the backend. */
327 /* Nonzero if we should track variables. When
328 flag_var_tracking == AUTODETECT_VALUE it will be set according
329 to optimize, debug_info_level and debug_hooks in process_options (). */
330 int flag_var_tracking
= AUTODETECT_VALUE
;
332 /* True if the user has tagged the function with the 'section'
335 bool user_defined_section_attribute
= false;
337 /* Values of the -falign-* flags: how much to align labels in code.
338 0 means `use default', 1 means `don't align'.
339 For each variable, there is an _log variant which is the power
340 of two not less than the variable, for .align output. */
343 int align_loops_max_skip
;
345 int align_jumps_max_skip
;
346 int align_labels_log
;
347 int align_labels_max_skip
;
348 int align_functions_log
;
352 const char *const string
;
356 lang_independent_options
;
358 /* Nonzero if subexpressions must be evaluated from left-to-right. */
359 int flag_evaluation_order
= 0;
361 /* The user symbol prefix after having resolved same. */
362 const char *user_label_prefix
;
364 static const param_info lang_independent_params
[] = {
365 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
366 { OPTION, DEFAULT, false, MIN, MAX, HELP },
367 #include "params.def"
369 { NULL
, 0, false, 0, 0, NULL
}
372 /* Output files for assembler code (real compiler output)
373 and debugging dumps. */
377 FILE *dump_file
= NULL
;
378 const char *dump_file_name
;
380 /* The current working directory of a translation. It's generally the
381 directory from which compilation was initiated, but a preprocessed
382 file may specify the original directory in which it was
385 static const char *src_pwd
;
387 /* Initialize src_pwd with the given string, and return true. If it
388 was already initialized, return false. As a special case, it may
389 be called with a NULL argument to test whether src_pwd has NOT been
393 set_src_pwd (const char *pwd
)
397 if (strcmp (src_pwd
, pwd
) == 0)
403 src_pwd
= xstrdup (pwd
);
407 /* Return the directory from which the translation unit was initiated,
408 in case set_src_pwd() was not called before to assign it a
424 /* Called when the start of a function definition is parsed,
425 this function prints on stderr the name of the function. */
427 announce_function (tree decl
)
431 if (rtl_dump_and_exit
)
432 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
434 fprintf (stderr
, " %s", lang_hooks
.decl_printable_name (decl
, 2));
436 pp_needs_newline (global_dc
->printer
) = true;
437 diagnostic_set_last_function (global_dc
);
441 /* Initialize local_tick with the time of day, or -1 if
442 flag_random_seed is set. */
445 init_local_tick (void)
447 if (!flag_random_seed
)
449 /* Get some more or less random data. */
450 #ifdef HAVE_GETTIMEOFDAY
454 gettimeofday (&tv
, NULL
);
455 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
459 time_t now
= time (NULL
);
461 if (now
!= (time_t)-1)
462 local_tick
= (unsigned) now
;
470 /* Set up a default flag_random_seed and local_tick, unless the user
471 already specified one. Must be called after init_local_tick. */
474 init_random_seed (void)
476 unsigned HOST_WIDE_INT value
;
477 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
479 value
= local_tick
^ getpid ();
481 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
482 flag_random_seed
= random_seed
;
485 /* Obtain the random_seed string. Unless NOINIT, initialize it if
486 it's not provided in the command line. */
489 get_random_seed (bool noinit
)
491 if (!flag_random_seed
&& !noinit
)
493 return flag_random_seed
;
496 /* Modify the random_seed string to VAL. Return its previous
500 set_random_seed (const char *val
)
502 const char *old
= flag_random_seed
;
503 flag_random_seed
= val
;
507 /* Decode the string P as an integral parameter.
508 If the string is indeed an integer return its numeric value else
509 issue an Invalid Option error for the option PNAME and return DEFVAL.
510 If PNAME is zero just return DEFVAL, do not call error. */
513 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
515 const char *endp
= p
;
528 error ("invalid option argument %qs", pname
);
535 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
536 for floor_log2 and exact_log2; see toplev.h. That construct, however,
537 conflicts with the ISO C++ One Definition Rule. */
539 #if GCC_VERSION < 3004 || !defined (__cplusplus)
541 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
542 If X is 0, return -1. */
545 floor_log2 (unsigned HOST_WIDE_INT x
)
553 t
= HOST_BITS_PER_WIDE_INT
- 1 - (int) CLZ_HWI (x
);
555 if (HOST_BITS_PER_WIDE_INT
> 64)
556 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
558 if (HOST_BITS_PER_WIDE_INT
> 32)
559 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 32))
561 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 16))
563 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 8))
565 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 4))
567 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 2))
569 if (x
>= ((unsigned HOST_WIDE_INT
) 1) << (t
+ 1))
576 /* Return the logarithm of X, base 2, considering X unsigned,
577 if X is a power of 2. Otherwise, returns -1. */
580 exact_log2 (unsigned HOST_WIDE_INT x
)
585 return x
? CTZ_HWI (x
) : -1;
587 return floor_log2 (x
);
591 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
593 /* Handler for fatal signals, such as SIGSEGV. These are transformed
594 into ICE messages, which is much more user friendly. In case the
595 error printer crashes, reset the signal to prevent infinite recursion. */
598 crash_signal (int signo
)
600 signal (signo
, SIG_DFL
);
602 /* If we crashed while processing an ASM statement, then be a little more
603 graceful. It's most likely the user's fault. */
604 if (this_is_asm_operands
)
606 output_operand_lossage ("unrecoverable error");
607 exit (FATAL_EXIT_CODE
);
610 internal_error ("%s", strsignal (signo
));
613 /* Arrange to dump core on error. (The regular error message is still
614 printed first, except in the case of abort().) */
617 setup_core_dumping (void)
620 signal (SIGABRT
, SIG_DFL
);
622 #if defined(HAVE_SETRLIMIT)
625 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
626 fatal_error ("getting core file size maximum limit: %m");
627 rlim
.rlim_cur
= rlim
.rlim_max
;
628 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
629 fatal_error ("setting core file size limit to maximum: %m");
632 diagnostic_abort_on_error (global_dc
);
636 /* Strip off a legitimate source ending from the input string NAME of
637 length LEN. Rather than having to know the names used by all of
638 our front ends, we strip off an ending of a period followed by
639 up to five characters. (Java uses ".class".) */
642 strip_off_ending (char *name
, int len
)
645 for (i
= 2; i
< 6 && len
> i
; i
++)
647 if (name
[len
- i
] == '.')
649 name
[len
- i
] = '\0';
655 /* Output a quoted string. */
658 output_quoted_string (FILE *asm_file
, const char *string
)
660 #ifdef OUTPUT_QUOTED_STRING
661 OUTPUT_QUOTED_STRING (asm_file
, string
);
665 putc ('\"', asm_file
);
666 while ((c
= *string
++) != 0)
670 if (c
== '\"' || c
== '\\')
671 putc ('\\', asm_file
);
675 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
677 putc ('\"', asm_file
);
681 /* Output a file name in the form wanted by System V. */
684 output_file_directive (FILE *asm_file
, const char *input_name
)
689 if (input_name
== NULL
)
690 input_name
= "<stdin>";
692 input_name
= remap_debug_filename (input_name
);
694 len
= strlen (input_name
);
695 na
= input_name
+ len
;
697 /* NA gets INPUT_NAME sans directory names. */
698 while (na
> input_name
)
700 if (IS_DIR_SEPARATOR (na
[-1]))
705 #ifdef ASM_OUTPUT_SOURCE_FILENAME
706 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
708 fprintf (asm_file
, "\t.file\t");
709 output_quoted_string (asm_file
, na
);
710 fputc ('\n', asm_file
);
714 /* A subroutine of wrapup_global_declarations. We've come to the end of
715 the compilation unit. All deferred variables should be undeferred,
716 and all incomplete decls should be finalized. */
719 wrapup_global_declaration_1 (tree decl
)
721 /* We're not deferring this any longer. Assignment is conditional to
722 avoid needlessly dirtying PCH pages. */
723 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl
), TS_DECL_WITH_VIS
)
724 && DECL_DEFER_OUTPUT (decl
) != 0)
725 DECL_DEFER_OUTPUT (decl
) = 0;
727 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
728 lang_hooks
.finish_incomplete_decl (decl
);
731 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
732 needs to be output. Return true if it is output. */
735 wrapup_global_declaration_2 (tree decl
)
737 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
740 /* Don't write out static consts, unless we still need them.
742 We also keep static consts if not optimizing (for debugging),
743 unless the user specified -fno-keep-static-consts.
744 ??? They might be better written into the debug information.
745 This is possible when using DWARF.
747 A language processor that wants static constants to be always
748 written out (even if it is not used) is responsible for
749 calling rest_of_decl_compilation itself. E.g. the C front-end
750 calls rest_of_decl_compilation from finish_decl.
751 One motivation for this is that is conventional in some
752 environments to write things like:
753 static const char rcsid[] = "... version string ...";
754 intending to force the string to be in the executable.
756 A language processor that would prefer to have unneeded
757 static constants "optimized away" would just defer writing
758 them out until here. E.g. C++ does this, because static
759 constants are often defined in header files.
761 ??? A tempting alternative (for both C and C++) would be
762 to force a constant to be written if and only if it is
763 defined in a main file, as opposed to an include file. */
765 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
767 struct varpool_node
*node
;
769 node
= varpool_node (decl
);
773 else if (node
->alias
)
775 else if (!cgraph_global_info_ready
777 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
779 else if (node
->needed
)
781 else if (DECL_COMDAT (decl
))
783 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
784 && (optimize
|| !flag_keep_static_consts
785 || DECL_ARTIFICIAL (decl
)))
790 rest_of_decl_compilation (decl
, 1, 1);
798 /* Do any final processing required for the declarations in VEC, of
799 which there are LEN. We write out inline functions and variables
800 that have been deferred until this point, but which are required.
801 Returns nonzero if anything was put out. */
804 wrapup_global_declarations (tree
*vec
, int len
)
806 bool reconsider
, output_something
= false;
809 for (i
= 0; i
< len
; i
++)
810 wrapup_global_declaration_1 (vec
[i
]);
812 /* Now emit any global variables or functions that we have been
813 putting off. We need to loop in case one of the things emitted
814 here references another one which comes earlier in the list. */
818 for (i
= 0; i
< len
; i
++)
819 reconsider
|= wrapup_global_declaration_2 (vec
[i
]);
821 output_something
= true;
825 return output_something
;
828 /* A subroutine of check_global_declarations. Issue appropriate warnings
829 for the global declaration DECL. */
832 check_global_declaration_1 (tree decl
)
834 /* Warn about any function declared static but not defined. We don't
835 warn about variables, because many programs have static variables
836 that exist only to get some text into the object file. */
837 if (TREE_CODE (decl
) == FUNCTION_DECL
838 && DECL_INITIAL (decl
) == 0
839 && DECL_EXTERNAL (decl
)
840 && ! DECL_ARTIFICIAL (decl
)
841 && ! TREE_NO_WARNING (decl
)
842 && ! TREE_PUBLIC (decl
)
843 && (warn_unused_function
844 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
846 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
847 pedwarn ("%q+F used but never defined", decl
);
849 warning (0, "%q+F declared %<static%> but never defined", decl
);
850 /* This symbol is effectively an "extern" declaration now. */
851 TREE_PUBLIC (decl
) = 1;
852 assemble_external (decl
);
855 /* Warn about static fns or vars defined but not used. */
856 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
857 /* We don't warn about "static const" variables because the
858 "rcs_id" idiom uses that construction. */
859 || (warn_unused_variable
860 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
861 && ! DECL_IN_SYSTEM_HEADER (decl
)
862 && ! TREE_USED (decl
)
863 /* The TREE_USED bit for file-scope decls is kept in the identifier,
864 to handle multiple external decls in different scopes. */
865 && ! (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
)))
866 && ! DECL_EXTERNAL (decl
)
867 && ! TREE_PUBLIC (decl
)
868 /* A volatile variable might be used in some non-obvious way. */
869 && ! TREE_THIS_VOLATILE (decl
)
870 /* Global register variables must be declared to reserve them. */
871 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
872 /* Otherwise, ask the language. */
873 && lang_hooks
.decls
.warn_unused_global (decl
))
874 warning (0, "%q+D defined but not used", decl
);
877 /* Issue appropriate warnings for the global declarations in VEC (of
878 which there are LEN). */
881 check_global_declarations (tree
*vec
, int len
)
885 for (i
= 0; i
< len
; i
++)
886 check_global_declaration_1 (vec
[i
]);
889 /* Emit debugging information for all global declarations in VEC. */
892 emit_debug_global_declarations (tree
*vec
, int len
)
896 /* Avoid confusing the debug information machinery when there are errors. */
897 if (errorcount
!= 0 || sorrycount
!= 0)
900 timevar_push (TV_SYMOUT
);
901 for (i
= 0; i
< len
; i
++)
902 debug_hooks
->global_decl (vec
[i
]);
903 timevar_pop (TV_SYMOUT
);
906 /* Warn about a use of an identifier which was marked deprecated. */
908 warn_deprecated_use (tree node
)
910 if (node
== 0 || !warn_deprecated_decl
)
915 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
916 warning (OPT_Wdeprecated_declarations
,
917 "%qD is deprecated (declared at %s:%d)",
918 node
, xloc
.file
, xloc
.line
);
920 else if (TYPE_P (node
))
922 const char *what
= NULL
;
923 tree decl
= TYPE_STUB_DECL (node
);
925 if (TYPE_NAME (node
))
927 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
928 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
929 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
930 && DECL_NAME (TYPE_NAME (node
)))
931 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
936 expanded_location xloc
937 = expand_location (DECL_SOURCE_LOCATION (decl
));
939 warning (OPT_Wdeprecated_declarations
,
940 "%qs is deprecated (declared at %s:%d)", what
,
941 xloc
.file
, xloc
.line
);
943 warning (OPT_Wdeprecated_declarations
,
944 "type is deprecated (declared at %s:%d)",
945 xloc
.file
, xloc
.line
);
950 warning (OPT_Wdeprecated_declarations
, "%qs is deprecated", what
);
952 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
957 /* Save the current INPUT_LOCATION on the top entry in the
958 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
959 INPUT_LOCATION accordingly. */
962 #ifdef USE_MAPPED_LOCATION
963 push_srcloc (location_t fline
)
965 push_srcloc (const char *file
, int line
)
968 struct file_stack
*fs
;
970 gcc_assert (!input_file_stack_restored
);
971 if (input_file_stack_tick
== (int) ((1U << INPUT_FILE_STACK_BITS
) - 1))
972 sorry ("GCC supports only %d input file changes", input_file_stack_tick
);
974 fs
= XNEW (struct file_stack
);
975 fs
->location
= input_location
;
976 fs
->next
= input_file_stack
;
977 #ifdef USE_MAPPED_LOCATION
978 input_location
= fline
;
980 input_filename
= file
;
983 input_file_stack
= fs
;
984 input_file_stack_tick
++;
985 VEC_safe_push (fs_p
, heap
, input_file_stack_history
, input_file_stack
);
988 /* Pop the top entry off the stack of presently open source files.
989 Restore the INPUT_LOCATION from the new topmost entry on the
995 struct file_stack
*fs
;
997 gcc_assert (!input_file_stack_restored
);
998 if (input_file_stack_tick
== (int) ((1U << INPUT_FILE_STACK_BITS
) - 1))
999 sorry ("GCC supports only %d input file changes", input_file_stack_tick
);
1001 fs
= input_file_stack
;
1002 input_location
= fs
->location
;
1003 input_file_stack
= fs
->next
;
1004 input_file_stack_tick
++;
1005 VEC_safe_push (fs_p
, heap
, input_file_stack_history
, input_file_stack
);
1008 /* Restore the input file stack to its state as of TICK, for the sake
1009 of diagnostics after processing the whole input. Once this has
1010 been called, push_srcloc and pop_srcloc may no longer be
1013 restore_input_file_stack (int tick
)
1016 input_file_stack
= NULL
;
1018 input_file_stack
= VEC_index (fs_p
, input_file_stack_history
, tick
- 1);
1019 input_file_stack_tick
= tick
;
1020 input_file_stack_restored
= true;
1023 /* Compile an entire translation unit. Write a file of assembly
1024 output and various debugging dumps. */
1029 /* Initialize yet another pass. */
1032 init_final (main_input_filename
);
1033 coverage_init (aux_base_name
);
1035 timevar_push (TV_PARSE
);
1037 /* Call the parser, which parses the entire file (calling
1038 rest_of_compilation for each function). */
1039 lang_hooks
.parse_file (set_yydebug
);
1041 /* In case there were missing block closers,
1042 get us back to the global binding level. */
1043 lang_hooks
.clear_binding_stack ();
1045 /* Compilation is now finished except for writing
1046 what's left of the symbol table output. */
1047 timevar_pop (TV_PARSE
);
1049 if (flag_syntax_only
)
1052 lang_hooks
.decls
.final_write_globals ();
1054 if (errorcount
|| sorrycount
)
1057 varpool_assemble_pending_decls ();
1058 finish_aliases_2 ();
1060 /* This must occur after the loop to output deferred functions.
1061 Else the coverage initializer would not be emitted if all the
1062 functions in this compilation unit were deferred. */
1065 /* Likewise for mudflap static object registrations. */
1067 mudflap_finish_file ();
1069 /* Likewise for emulated thread-local storage. */
1070 if (!targetm
.have_tls
)
1073 output_shared_constant_pool ();
1074 output_object_blocks ();
1076 /* Write out any pending weak symbol declarations. */
1079 /* Do dbx symbols. */
1080 timevar_push (TV_SYMOUT
);
1082 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1083 if (dwarf2out_do_frame ())
1084 dwarf2out_frame_finish ();
1087 (*debug_hooks
->finish
) (main_input_filename
);
1088 timevar_pop (TV_SYMOUT
);
1090 /* Output some stuff at end of file if nec. */
1092 dw2_output_indirect_constants ();
1094 /* Flush any pending external directives. */
1095 process_pending_assemble_externals ();
1097 /* Attach a special .ident directive to the end of the file to identify
1098 the version of GCC which compiled this code. The format of the .ident
1099 string is patterned after the ones produced by native SVR4 compilers. */
1103 const char *pkg_version
= "(GNU) ";
1105 if (strcmp ("(GCC) ", pkgversion_string
))
1106 pkg_version
= pkgversion_string
;
1107 fprintf (asm_out_file
, "%s\"GCC: %s%s\"\n",
1108 IDENT_ASM_OP
, pkg_version
, version_string
);
1112 /* This must be at the end. Some target ports emit end of file directives
1113 into the assembly file here, and hence we can not output anything to the
1114 assembly file after this point. */
1115 targetm
.asm_out
.file_end ();
1118 /* Parse a -d... command line switch. */
1121 decode_d_option (const char *arg
)
1132 flag_print_asm_name
= 1;
1135 flag_dump_rtl_in_asm
= 1;
1136 flag_print_asm_name
= 1;
1139 graph_dump_format
= vcg
;
1142 rtl_dump_and_exit
= 1;
1147 case 'D': /* These are handled by the preprocessor. */
1151 setup_core_dumping();
1156 if (!enable_rtl_dump_file (c
))
1157 warning (0, "unrecognized gcc debugging option: %c", c
);
1162 /* Indexed by enum debug_info_type. */
1163 const char *const debug_type_names
[] =
1165 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1168 /* Print version information to FILE.
1169 Each line begins with INDENT (for the case where FILE is the
1170 assembler output file). */
1173 print_version (FILE *file
, const char *indent
)
1175 static const char fmt1
[] =
1177 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1179 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1182 static const char fmt2
[] =
1183 N_("GMP version %s, MPFR version %s.\n");
1184 static const char fmt3
[] =
1185 N_("warning: %s header version %s differs from library version %s.\n");
1186 static const char fmt4
[] =
1187 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1189 #define __VERSION__ "[?]"
1192 file
== stderr
? _(fmt1
) : fmt1
,
1193 indent
, *indent
!= 0 ? " " : "",
1194 lang_hooks
.name
, pkgversion_string
, version_string
, TARGET_NAME
,
1195 indent
, __VERSION__
);
1197 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1198 two string formats, "i.j.k" and "i.j" when k is zero. */
1199 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1200 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1201 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1202 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1203 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1205 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1206 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1207 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1210 file
== stderr
? _(fmt2
) : fmt2
,
1211 GCC_GMP_STRINGIFY_VERSION
, MPFR_VERSION_STRING
);
1212 if (strcmp (GCC_GMP_STRINGIFY_VERSION
, gmp_version
))
1214 file
== stderr
? _(fmt3
) : fmt3
,
1215 "GMP", GCC_GMP_STRINGIFY_VERSION
, gmp_version
);
1216 if (strcmp (MPFR_VERSION_STRING
, mpfr_get_version ()))
1218 file
== stderr
? _(fmt3
) : fmt3
,
1219 "MPFR", MPFR_VERSION_STRING
, mpfr_get_version ());
1221 file
== stderr
? _(fmt4
) : fmt4
,
1222 indent
, *indent
!= 0 ? " " : "",
1223 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1226 #ifdef ASM_COMMENT_START
1228 print_to_asm_out_file (print_switch_type type
, const char * text
)
1230 bool prepend_sep
= true;
1234 case SWITCH_TYPE_LINE_END
:
1235 putc ('\n', asm_out_file
);
1238 case SWITCH_TYPE_LINE_START
:
1239 fputs (ASM_COMMENT_START
, asm_out_file
);
1240 return strlen (ASM_COMMENT_START
);
1242 case SWITCH_TYPE_DESCRIPTIVE
:
1243 if (ASM_COMMENT_START
[0] == 0)
1244 prepend_sep
= false;
1246 case SWITCH_TYPE_PASSED
:
1247 case SWITCH_TYPE_ENABLED
:
1249 fputc (' ', asm_out_file
);
1250 fprintf (asm_out_file
, text
);
1251 /* No need to return the length here as
1252 print_single_switch has already done it. */
1262 print_to_stderr (print_switch_type type
, const char * text
)
1266 case SWITCH_TYPE_LINE_END
:
1267 putc ('\n', stderr
);
1270 case SWITCH_TYPE_LINE_START
:
1273 case SWITCH_TYPE_PASSED
:
1274 case SWITCH_TYPE_ENABLED
:
1275 fputc (' ', stderr
);
1278 case SWITCH_TYPE_DESCRIPTIVE
:
1279 fprintf (stderr
, text
);
1280 /* No need to return the length here as
1281 print_single_switch has already done it. */
1289 /* Print an option value and return the adjusted position in the line.
1290 ??? print_fn doesn't handle errors, eg disk full; presumably other
1291 code will catch a disk full though. */
1294 print_single_switch (print_switch_fn_type print_fn
,
1296 print_switch_type type
,
1299 /* The ultrix fprintf returns 0 on success, so compute the result
1300 we want here since we need it for the following test. The +1
1301 is for the separator character that will probably be emitted. */
1302 int len
= strlen (text
) + 1;
1305 && pos
+ len
> MAX_LINE
)
1307 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1312 pos
+= print_fn (SWITCH_TYPE_LINE_START
, NULL
);
1314 print_fn (type
, text
);
1318 /* Print active target switches using PRINT_FN.
1319 POS is the current cursor position and MAX is the size of a "line".
1320 Each line begins with INDENT and ends with TERM.
1321 Each switch is separated from the next by SEP. */
1324 print_switch_values (print_switch_fn_type print_fn
)
1330 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1331 that it can be printed below. This helps reproducibility. */
1332 if (!flag_random_seed
)
1333 init_random_seed ();
1335 /* Print the options as passed. */
1336 pos
= print_single_switch (print_fn
, pos
,
1337 SWITCH_TYPE_DESCRIPTIVE
, _("options passed: "));
1339 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1344 if (strcmp (*p
, "-o") == 0
1345 || strcmp (*p
, "-dumpbase") == 0
1346 || strcmp (*p
, "-auxbase") == 0)
1353 if (strcmp (*p
, "-quiet") == 0
1354 || strcmp (*p
, "-version") == 0)
1361 pos
= print_single_switch (print_fn
, pos
, SWITCH_TYPE_PASSED
, *p
);
1365 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1367 /* Print the -f and -m options that have been enabled.
1368 We don't handle language specific options but printing argv
1370 pos
= print_single_switch (print_fn
, 0,
1371 SWITCH_TYPE_DESCRIPTIVE
, _("options enabled: "));
1373 for (j
= 0; j
< cl_options_count
; j
++)
1374 if ((cl_options
[j
].flags
& CL_REPORT
)
1375 && option_enabled (j
) > 0)
1376 pos
= print_single_switch (print_fn
, pos
,
1377 SWITCH_TYPE_ENABLED
, cl_options
[j
].opt_text
);
1379 print_fn (SWITCH_TYPE_LINE_END
, NULL
);
1382 /* Open assembly code output file. Do this even if -fsyntax-only is
1383 on, because then the driver will have provided the name of a
1384 temporary file or bit bucket for us. NAME is the file specified on
1385 the command line, possibly NULL. */
1387 init_asm_output (const char *name
)
1389 if (name
== NULL
&& asm_file_name
== 0)
1390 asm_out_file
= stdout
;
1393 if (asm_file_name
== 0)
1395 int len
= strlen (dump_base_name
);
1396 char *dumpname
= XNEWVEC (char, len
+ 6);
1398 memcpy (dumpname
, dump_base_name
, len
+ 1);
1399 strip_off_ending (dumpname
, len
);
1400 strcat (dumpname
, ".s");
1401 asm_file_name
= dumpname
;
1403 if (!strcmp (asm_file_name
, "-"))
1404 asm_out_file
= stdout
;
1406 asm_out_file
= fopen (asm_file_name
, "w+b");
1407 if (asm_out_file
== 0)
1408 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1411 if (!flag_syntax_only
)
1413 targetm
.asm_out
.file_start ();
1415 if (flag_record_gcc_switches
)
1417 if (targetm
.asm_out
.record_gcc_switches
)
1419 /* Let the target know that we are about to start recording. */
1420 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1422 /* Now record the switches. */
1423 print_switch_values (targetm
.asm_out
.record_gcc_switches
);
1424 /* Let the target know that the recording is over. */
1425 targetm
.asm_out
.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE
,
1429 inform ("-frecord-gcc-switches is not supported by the current target");
1432 #ifdef ASM_COMMENT_START
1433 if (flag_verbose_asm
)
1435 /* Print the list of switches in effect
1436 into the assembler file as comments. */
1437 print_version (asm_out_file
, ASM_COMMENT_START
);
1438 print_switch_values (print_to_asm_out_file
);
1439 fprintf (asm_out_file
, "\n");
1445 /* Return true if the state of option OPTION should be stored in PCH files
1446 and checked by default_pch_valid_p. Store the option's current state
1450 option_affects_pch_p (int option
, struct cl_option_state
*state
)
1452 if ((cl_options
[option
].flags
& CL_TARGET
) == 0)
1454 if (cl_options
[option
].flag_var
== &target_flags
)
1455 if (targetm
.check_pch_target_flags
)
1457 return get_option_state (option
, state
);
1460 /* Default version of get_pch_validity.
1461 By default, every flag difference is fatal; that will be mostly right for
1462 most targets, but completely right for very few. */
1465 default_get_pch_validity (size_t *len
)
1467 struct cl_option_state state
;
1472 if (targetm
.check_pch_target_flags
)
1473 *len
+= sizeof (target_flags
);
1474 for (i
= 0; i
< cl_options_count
; i
++)
1475 if (option_affects_pch_p (i
, &state
))
1478 result
= r
= XNEWVEC (char, *len
);
1482 if (targetm
.check_pch_target_flags
)
1484 memcpy (r
, &target_flags
, sizeof (target_flags
));
1485 r
+= sizeof (target_flags
);
1488 for (i
= 0; i
< cl_options_count
; i
++)
1489 if (option_affects_pch_p (i
, &state
))
1491 memcpy (r
, state
.data
, state
.size
);
1498 /* Return a message which says that a PCH file was created with a different
1499 setting of OPTION. */
1502 pch_option_mismatch (const char *option
)
1506 asprintf (&r
, _("created and used with differing settings of '%s'"), option
);
1508 return _("out of memory");
1512 /* Default version of pch_valid_p. */
1515 default_pch_valid_p (const void *data_p
, size_t len
)
1517 struct cl_option_state state
;
1518 const char *data
= (const char *)data_p
;
1521 /* -fpic and -fpie also usually make a PCH invalid. */
1522 if (data
[0] != flag_pic
)
1523 return _("created and used with different settings of -fpic");
1524 if (data
[1] != flag_pie
)
1525 return _("created and used with different settings of -fpie");
1528 /* Check target_flags. */
1529 if (targetm
.check_pch_target_flags
)
1534 memcpy (&tf
, data
, sizeof (target_flags
));
1535 data
+= sizeof (target_flags
);
1536 len
-= sizeof (target_flags
);
1537 r
= targetm
.check_pch_target_flags (tf
);
1542 for (i
= 0; i
< cl_options_count
; i
++)
1543 if (option_affects_pch_p (i
, &state
))
1545 if (memcmp (data
, state
.data
, state
.size
) != 0)
1546 return pch_option_mismatch (cl_options
[i
].opt_text
);
1554 /* Default tree printer. Handles declarations only. */
1556 default_tree_printer (pretty_printer
* pp
, text_info
*text
, const char *spec
,
1557 int precision
, bool wide
, bool set_locus
, bool hash
)
1561 /* FUTURE: %+x should set the locus. */
1562 if (precision
!= 0 || wide
|| hash
)
1568 t
= va_arg (*text
->args_ptr
, tree
);
1569 if (DECL_DEBUG_EXPR_IS_FROM (t
) && DECL_DEBUG_EXPR (t
))
1570 t
= DECL_DEBUG_EXPR (t
);
1575 t
= va_arg (*text
->args_ptr
, tree
);
1582 if (set_locus
&& text
->locus
)
1583 *text
->locus
= DECL_SOURCE_LOCATION (t
);
1587 const char *n
= DECL_NAME (t
)
1588 ? lang_hooks
.decl_printable_name (t
, 2)
1593 dump_generic_node (pp
, t
, 0, TDF_DIAGNOSTIC
, 0);
1598 /* A helper function; used as the reallocator function for cpp's line
1601 realloc_for_line_map (void *ptr
, size_t len
)
1603 return ggc_realloc (ptr
, len
);
1606 /* Initialization of the front end environment, before command line
1607 options are parsed. Signal handlers, internationalization etc.
1608 ARGV0 is main's argv[0]. */
1610 general_init (const char *argv0
)
1614 p
= argv0
+ strlen (argv0
);
1615 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1619 xmalloc_set_program_name (progname
);
1623 /* Unlock the stdio streams. */
1624 unlock_std_streams ();
1626 gcc_init_libintl ();
1628 /* Initialize the diagnostics reporting machinery, so option parsing
1629 can give warnings and errors. */
1630 diagnostic_initialize (global_dc
);
1631 /* Set a default printer. Language specific initializations will
1632 override it later. */
1633 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1635 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1637 signal (SIGSEGV
, crash_signal
);
1640 signal (SIGILL
, crash_signal
);
1643 signal (SIGBUS
, crash_signal
);
1646 signal (SIGABRT
, crash_signal
);
1648 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1649 signal (SIGIOT
, crash_signal
);
1652 signal (SIGFPE
, crash_signal
);
1655 /* Other host-specific signal setup. */
1656 (*host_hooks
.extra_signals
)();
1658 /* Initialize the garbage-collector, string pools and tree type hash
1662 line_table
= GGC_NEW (struct line_maps
);
1663 linemap_init (line_table
);
1664 line_table
->reallocator
= realloc_for_line_map
;
1667 /* Initialize register usage now so switches may override. */
1670 /* Register the language-independent parameters. */
1671 add_params (lang_independent_params
, LAST_PARAM
);
1673 /* This must be done after add_params but before argument processing. */
1674 init_ggc_heuristics();
1675 init_optimization_passes ();
1678 /* Return true if the current target supports -fsection-anchors. */
1681 target_supports_section_anchors_p (void)
1683 if (targetm
.min_anchor_offset
== 0 && targetm
.max_anchor_offset
== 0)
1686 if (targetm
.asm_out
.output_anchor
== NULL
)
1692 /* Default the align_* variables to 1 if they're still unset, and
1693 set up the align_*_log variables. */
1695 init_alignments (void)
1697 if (align_loops
<= 0)
1699 if (align_loops_max_skip
> align_loops
)
1700 align_loops_max_skip
= align_loops
- 1;
1701 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1702 if (align_jumps
<= 0)
1704 if (align_jumps_max_skip
> align_jumps
)
1705 align_jumps_max_skip
= align_jumps
- 1;
1706 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1707 if (align_labels
<= 0)
1709 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1710 if (align_labels_max_skip
> align_labels
)
1711 align_labels_max_skip
= align_labels
- 1;
1712 if (align_functions
<= 0)
1713 align_functions
= 1;
1714 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1717 /* Process the options that have been parsed. */
1719 process_options (void)
1721 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1722 This can happen with incorrect pre-processed input. */
1723 debug_hooks
= &do_nothing_debug_hooks
;
1725 /* Allow the front end to perform consistency checks and do further
1726 initialization based on the command line options. This hook also
1727 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1728 so we can correctly initialize debug output. */
1729 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1730 #ifndef USE_MAPPED_LOCATION
1731 input_filename
= main_input_filename
;
1734 #ifdef OVERRIDE_OPTIONS
1735 /* Some machines may reject certain combinations of options. */
1739 if (flag_section_anchors
&& !target_supports_section_anchors_p ())
1741 warning (OPT_fsection_anchors
,
1742 "this target does not support %qs", "-fsection-anchors");
1743 flag_section_anchors
= 0;
1746 if (flag_short_enums
== 2)
1747 flag_short_enums
= targetm
.default_short_enums ();
1749 /* Set aux_base_name if not already set. */
1752 else if (main_input_filename
)
1754 char *name
= xstrdup (lbasename (main_input_filename
));
1756 strip_off_ending (name
, strlen (name
));
1757 aux_base_name
= name
;
1760 aux_base_name
= "gccaux";
1762 /* Unrolling all loops implies that standard loop unrolling must also
1764 if (flag_unroll_all_loops
)
1765 flag_unroll_loops
= 1;
1767 /* The loop unrolling code assumes that cse will be run after loop.
1768 web and rename-registers also help when run after loop unrolling. */
1770 if (flag_rerun_cse_after_loop
== AUTODETECT_VALUE
)
1771 flag_rerun_cse_after_loop
= flag_unroll_loops
|| flag_peel_loops
;
1772 if (flag_web
== AUTODETECT_VALUE
)
1773 flag_web
= flag_unroll_loops
|| flag_peel_loops
;
1774 if (flag_rename_registers
== AUTODETECT_VALUE
)
1775 flag_rename_registers
= flag_unroll_loops
|| flag_peel_loops
;
1777 if (flag_non_call_exceptions
)
1778 flag_asynchronous_unwind_tables
= 1;
1779 if (flag_asynchronous_unwind_tables
)
1780 flag_unwind_tables
= 1;
1782 if (!flag_unit_at_a_time
)
1783 flag_section_anchors
= 0;
1785 if (flag_value_profile_transformations
)
1786 flag_profile_values
= 1;
1788 /* Warn about options that are not supported on this machine. */
1789 #ifndef INSN_SCHEDULING
1790 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1791 warning (0, "instruction scheduling not supported on this target machine");
1794 if (flag_delayed_branch
)
1795 warning (0, "this target machine does not have delayed branches");
1798 user_label_prefix
= USER_LABEL_PREFIX
;
1799 if (flag_leading_underscore
!= -1)
1801 /* If the default prefix is more complicated than "" or "_",
1802 issue a warning and ignore this option. */
1803 if (user_label_prefix
[0] == 0 ||
1804 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1806 user_label_prefix
= flag_leading_underscore
? "_" : "";
1809 warning (0, "-f%sleading-underscore not supported on this target machine",
1810 flag_leading_underscore
? "" : "no-");
1813 /* If we are in verbose mode, write out the version and maybe all the
1814 option flags in use. */
1817 print_version (stderr
, "");
1819 print_switch_values (print_to_stderr
);
1822 if (flag_syntax_only
)
1824 write_symbols
= NO_DEBUG
;
1828 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1830 if (debug_info_level
== DINFO_LEVEL_NONE
)
1831 write_symbols
= NO_DEBUG
;
1833 /* Now we know write_symbols, set up the debug hooks based on it.
1834 By default we do nothing for debug output. */
1835 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1836 default_debug_hooks
= &do_nothing_debug_hooks
;
1837 #if defined(DBX_DEBUGGING_INFO)
1838 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1839 default_debug_hooks
= &dbx_debug_hooks
;
1841 #if defined(XCOFF_DEBUGGING_INFO)
1842 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1843 default_debug_hooks
= &xcoff_debug_hooks
;
1845 #ifdef SDB_DEBUGGING_INFO
1846 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1847 default_debug_hooks
= &sdb_debug_hooks
;
1849 #ifdef DWARF2_DEBUGGING_INFO
1850 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1851 default_debug_hooks
= &dwarf2_debug_hooks
;
1853 #ifdef VMS_DEBUGGING_INFO
1854 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1855 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1856 default_debug_hooks
= &vmsdbg_debug_hooks
;
1859 if (write_symbols
== NO_DEBUG
)
1861 #if defined(DBX_DEBUGGING_INFO)
1862 else if (write_symbols
== DBX_DEBUG
)
1863 debug_hooks
= &dbx_debug_hooks
;
1865 #if defined(XCOFF_DEBUGGING_INFO)
1866 else if (write_symbols
== XCOFF_DEBUG
)
1867 debug_hooks
= &xcoff_debug_hooks
;
1869 #ifdef SDB_DEBUGGING_INFO
1870 else if (write_symbols
== SDB_DEBUG
)
1871 debug_hooks
= &sdb_debug_hooks
;
1873 #ifdef DWARF2_DEBUGGING_INFO
1874 else if (write_symbols
== DWARF2_DEBUG
)
1875 debug_hooks
= &dwarf2_debug_hooks
;
1877 #ifdef VMS_DEBUGGING_INFO
1878 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1879 debug_hooks
= &vmsdbg_debug_hooks
;
1882 error ("target system does not support the \"%s\" debug format",
1883 debug_type_names
[write_symbols
]);
1885 /* Now we know which debug output will be used so we can set
1886 flag_var_tracking, flag_rename_registers if the user has
1887 not specified them. */
1888 if (debug_info_level
< DINFO_LEVEL_NORMAL
1889 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1891 if (flag_var_tracking
== 1
1892 || flag_var_tracking_uninit
== 1)
1894 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1895 warning (0, "variable tracking requested, but useless unless "
1896 "producing debug info");
1898 warning (0, "variable tracking requested, but not supported "
1899 "by this debug format");
1901 flag_var_tracking
= 0;
1902 flag_var_tracking_uninit
= 0;
1905 if (flag_rename_registers
== AUTODETECT_VALUE
)
1906 flag_rename_registers
= default_debug_hooks
->var_location
1907 != do_nothing_debug_hooks
.var_location
;
1909 if (flag_var_tracking
== AUTODETECT_VALUE
)
1910 flag_var_tracking
= optimize
>= 1;
1912 if (flag_tree_cselim
== AUTODETECT_VALUE
)
1913 #ifdef HAVE_conditional_move
1914 flag_tree_cselim
= 1;
1916 flag_tree_cselim
= 0;
1919 /* If the user specifically requested variable tracking with tagging
1920 uninitialized variables, we need to turn on variable tracking.
1921 (We already determined above that variable tracking is feasible.) */
1922 if (flag_var_tracking_uninit
)
1923 flag_var_tracking
= 1;
1925 /* If auxiliary info generation is desired, open the output file.
1926 This goes in the same directory as the source file--unlike
1927 all the other output files. */
1928 if (flag_gen_aux_info
)
1930 aux_info_file
= fopen (aux_info_file_name
, "w");
1931 if (aux_info_file
== 0)
1932 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1935 if (! targetm
.have_named_sections
)
1937 if (flag_function_sections
)
1939 warning (0, "-ffunction-sections not supported for this target");
1940 flag_function_sections
= 0;
1942 if (flag_data_sections
)
1944 warning (0, "-fdata-sections not supported for this target");
1945 flag_data_sections
= 0;
1949 if (flag_function_sections
&& profile_flag
)
1951 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1952 flag_function_sections
= 0;
1955 #ifndef HAVE_prefetch
1956 if (flag_prefetch_loop_arrays
)
1958 warning (0, "-fprefetch-loop-arrays not supported for this target");
1959 flag_prefetch_loop_arrays
= 0;
1962 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1964 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1965 flag_prefetch_loop_arrays
= 0;
1969 /* This combination of options isn't handled for i386 targets and doesn't
1970 make much sense anyway, so don't allow it. */
1971 if (flag_prefetch_loop_arrays
&& optimize_size
)
1973 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1974 flag_prefetch_loop_arrays
= 0;
1977 #ifndef OBJECT_FORMAT_ELF
1978 #ifndef OBJECT_FORMAT_MACHO
1979 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1980 warning (0, "-ffunction-sections may affect debugging on some targets");
1984 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1985 if (flag_signaling_nans
)
1986 flag_trapping_math
= 1;
1988 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1989 if (flag_cx_limited_range
)
1990 flag_complex_method
= 0;
1992 /* Targets must be able to place spill slots at lower addresses. If the
1993 target already uses a soft frame pointer, the transition is trivial. */
1994 if (!FRAME_GROWS_DOWNWARD
&& flag_stack_protect
)
1996 warning (0, "-fstack-protector not supported for this target");
1997 flag_stack_protect
= 0;
1999 if (!flag_stack_protect
)
2000 warn_stack_protect
= 0;
2002 /* ??? Unwind info is not correct around the CFG unless either a frame
2003 pointer is present or A_O_A is set. Fixing this requires rewriting
2004 unwind info generation to be aware of the CFG and propagating states
2006 if (flag_unwind_tables
&& !ACCUMULATE_OUTGOING_ARGS
2007 && flag_omit_frame_pointer
)
2009 warning (0, "unwind tables currently requires a frame pointer "
2011 flag_omit_frame_pointer
= 0;
2015 /* This function can be called multiple times to reinitialize the compiler
2016 back end when register classes or instruction sets have changed,
2017 before each function. */
2019 backend_init_target (void)
2021 /* Initialize alignment variables. */
2024 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2025 to initialize reg_raw_mode[]. */
2028 /* This invokes target hooks to set fixed_reg[] etc, which is
2032 /* This depends on stack_pointer_rtx. */
2033 init_fake_stack_mems ();
2035 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2037 init_alias_target ();
2039 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2042 /* The following initialization functions need to generate rtl, so
2043 provide a dummy function context for them. */
2044 init_dummy_function_start ();
2046 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2047 on a mode change. */
2050 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2051 after a mode change as well. */
2052 if (flag_caller_saves
)
2053 init_caller_save ();
2054 expand_dummy_function_end ();
2057 /* Initialize the compiler back end. This function is called only once,
2058 when starting the compiler. */
2062 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2063 || debug_info_level
== DINFO_LEVEL_VERBOSE
2064 #ifdef VMS_DEBUGGING_INFO
2065 /* Enable line number info for traceback. */
2066 || debug_info_level
> DINFO_LEVEL_NONE
2068 || flag_test_coverage
);
2071 init_inline_once ();
2072 init_varasm_once ();
2073 save_register_info ();
2075 /* Initialize the target-specific back end pieces. */
2076 backend_init_target ();
2079 /* Initialize things that are both lang-dependent and target-dependent.
2080 This function can be called more than once if target parameters change. */
2082 lang_dependent_init_target (void)
2084 /* This creates various _DECL nodes, so needs to be called after the
2085 front end is initialized. It also depends on the HAVE_xxx macros
2086 generated from the target machine description. */
2089 /* The following initialization functions need to generate rtl, so
2090 provide a dummy function context for them. */
2091 init_dummy_function_start ();
2093 /* Do the target-specific parts of expr initialization. */
2094 init_expr_target ();
2096 /* Although the actions of init_set_costs are language-independent,
2097 it uses optabs, so we cannot call it from backend_init. */
2100 expand_dummy_function_end ();
2103 /* Language-dependent initialization. Returns nonzero on success. */
2105 lang_dependent_init (const char *name
)
2107 location_t save_loc
= input_location
;
2108 if (dump_base_name
== 0)
2109 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
2111 /* Other front-end initialization. */
2112 #ifdef USE_MAPPED_LOCATION
2113 input_location
= BUILTINS_LOCATION
;
2115 input_filename
= "<built-in>";
2118 if (lang_hooks
.init () == 0)
2120 input_location
= save_loc
;
2122 init_asm_output (name
);
2124 /* This creates various _DECL nodes, so needs to be called after the
2125 front end is initialized. */
2128 /* Do the target-specific parts of the initialization. */
2129 lang_dependent_init_target ();
2131 /* If dbx symbol table desired, initialize writing it and output the
2132 predefined types. */
2133 timevar_push (TV_SYMOUT
);
2135 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2136 if (dwarf2out_do_frame ())
2137 dwarf2out_frame_init ();
2140 /* Now we have the correct original filename, we can initialize
2142 (*debug_hooks
->init
) (name
);
2144 timevar_pop (TV_SYMOUT
);
2150 /* Reinitialize everything when target parameters, such as register usage,
2153 target_reinit (void)
2155 /* Reinitialise RTL backend. */
2156 backend_init_target ();
2158 /* Reinitialize lang-dependent parts. */
2159 lang_dependent_init_target ();
2163 dump_memory_report (bool final
)
2165 ggc_print_statistics ();
2166 stringpool_statistics ();
2167 dump_tree_statistics ();
2168 dump_rtx_statistics ();
2169 dump_varray_statistics ();
2170 dump_alloc_pool_statistics ();
2171 dump_bitmap_statistics ();
2172 dump_ggc_loc_statistics (final
);
2175 /* Clean up: close opened files, etc. */
2180 /* Close the dump files. */
2181 if (flag_gen_aux_info
)
2183 fclose (aux_info_file
);
2185 unlink (aux_info_file_name
);
2188 /* Close non-debugging input and output files. Take special care to note
2189 whether fclose returns an error, since the pages might still be on the
2190 buffer chain while the file is open. */
2194 if (ferror (asm_out_file
) != 0)
2195 fatal_error ("error writing to %s: %m", asm_file_name
);
2196 if (fclose (asm_out_file
) != 0)
2197 fatal_error ("error closing %s: %m", asm_file_name
);
2200 finish_optimization_passes ();
2203 dump_memory_report (true);
2205 /* Language-specific end of compilation actions. */
2206 lang_hooks
.finish ();
2209 /* Initialize the compiler, and compile the input file. */
2213 /* Initialize timing first. The C front ends read the main file in
2214 the post_options hook, and C++ does file timings. */
2215 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2217 timevar_start (TV_TOTAL
);
2221 /* Don't do any more if an error has already occurred. */
2224 /* This must be run always, because it is needed to compute the FP
2225 predefined macros, such as __LDBL_MAX__, for targets using non
2226 default FP formats. */
2227 init_adjust_machine_modes ();
2229 /* Set up the back-end if requested. */
2233 /* Language-dependent initialization. Returns true on success. */
2234 if (lang_dependent_init (main_input_filename
))
2240 /* Stop timing and print the times. */
2241 timevar_stop (TV_TOTAL
);
2242 timevar_print (stderr
);
2245 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2246 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2247 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2249 It is not safe to call this function more than once. */
2252 toplev_main (unsigned int argc
, const char **argv
)
2256 /* Initialization of GCC's environment, and diagnostics. */
2257 general_init (argv
[0]);
2259 /* Parse the options and do minimal processing; basically just
2260 enough to default flags appropriately. */
2261 decode_options (argc
, argv
);
2265 /* Exit early if we can (e.g. -help). */
2266 if (!exit_after_options
)
2269 if (errorcount
|| sorrycount
)
2270 return (FATAL_EXIT_CODE
);
2272 return (SUCCESS_EXIT_CODE
);