1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
69 #include "dwarf2asm.h"
70 #include "integrate.h"
74 #include "langhooks.h"
75 #include "cfglayout.h"
77 #include "hosthooks.h"
81 #include "value-prof.h"
82 #include "alloc-pool.h"
84 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
85 #include "dwarf2out.h"
88 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
92 #ifdef SDB_DEBUGGING_INFO
96 #ifdef XCOFF_DEBUGGING_INFO
97 #include "xcoffout.h" /* Needed for external data
98 declarations for e.g. AIX 4.x. */
101 static void general_init (const char *);
102 static void do_compile (void);
103 static void process_options (void);
104 static void backend_init (void);
105 static int lang_dependent_init (const char *);
106 static void init_asm_output (const char *);
107 static void finalize (void);
109 static void crash_signal (int) ATTRIBUTE_NORETURN
;
110 static void setup_core_dumping (void);
111 static void compile_file (void);
113 static int print_single_switch (FILE *, int, int, const char *,
114 const char *, const char *,
115 const char *, const char *);
116 static void print_switch_values (FILE *, int, int, const char *,
117 const char *, const char *);
119 /* Nonzero to dump debug info whilst parsing (-dy option). */
120 static int set_yydebug
;
122 /* True if we don't need a backend (e.g. preprocessing only). */
123 static bool no_backend
;
125 /* Length of line when printing switch values. */
128 /* Name of program invoked, sans directories. */
130 const char *progname
;
132 /* Copy of argument vector to toplev_main. */
133 static const char **save_argv
;
135 /* Name of top-level original source file (what was input to cpp).
136 This comes from the #-command at the beginning of the actual input.
137 If there isn't any there, then this is the cc1 input file name. */
139 const char *main_input_filename
;
141 #ifndef USE_MAPPED_LOCATION
142 location_t unknown_location
= { NULL
, 0 };
145 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
146 to optimize and default_debug_hooks in process_options (). */
147 #define AUTODETECT_FLAG_VAR_TRACKING 2
149 /* Current position in real source file. */
151 location_t input_location
;
153 struct line_maps line_table
;
155 /* Nonzero if it is unsafe to create any new pseudo registers. */
158 /* Stack of currently pending input files. */
160 struct file_stack
*input_file_stack
;
162 /* Incremented on each change to input_file_stack. */
163 int input_file_stack_tick
;
165 /* Name to use as base of names for dump output files. */
167 const char *dump_base_name
;
169 /* Name to use as a base for auxiliary output files. */
171 const char *aux_base_name
;
173 /* Bit flags that specify the machine subtype we are compiling for.
174 Bits are tested using macros TARGET_... defined in the tm.h file
175 and set by `-m...' switches. Must be defined in rtlanal.c. */
177 extern int target_flags
;
179 /* A mask of target_flags that includes bit X if X was set or cleared
180 on the command line. */
182 int target_flags_explicit
;
184 /* Debug hooks - dependent upon command line options. */
186 const struct gcc_debug_hooks
*debug_hooks
;
188 /* Debug hooks - target default. */
190 static const struct gcc_debug_hooks
*default_debug_hooks
;
192 /* Other flags saying which kinds of debugging dump have been requested. */
194 int rtl_dump_and_exit
;
195 int flag_print_asm_name
;
196 enum graph_dump_types graph_dump_format
;
198 /* Name for output file of assembly code, specified with -o. */
200 const char *asm_file_name
;
202 /* Nonzero means do optimizations. -O.
203 Particular numeric values stand for particular amounts of optimization;
204 thus, -O2 stores 2 here. However, the optimizations beyond the basic
205 ones are not controlled directly by this variable. Instead, they are
206 controlled by individual `flag_...' variables that are defaulted
207 based on this variable. */
211 /* Nonzero means optimize for size. -Os.
212 The only valid values are zero and nonzero. When optimize_size is
213 nonzero, optimize defaults to 2, but certain individual code
214 bloating optimizations are disabled. */
216 int optimize_size
= 0;
218 /* The FUNCTION_DECL for the function currently being compiled,
219 or 0 if between functions. */
220 tree current_function_decl
;
222 /* Set to the FUNC_BEGIN label of the current function, or NULL
224 const char * current_function_func_begin_label
;
226 /* Temporarily suppress certain warnings.
227 This is set while reading code from a system header file. */
229 int in_system_header
= 0;
231 /* Nonzero means to collect statistics which might be expensive
232 and to print them when we are done. */
233 int flag_detailed_statistics
= 0;
235 /* A random sequence of characters, unless overridden by user. */
236 const char *flag_random_seed
;
238 /* A local time stamp derived from the time of compilation. It will be
239 zero if the system cannot provide a time. It will be -1u, if the
240 user has specified a particular random seed. */
245 /* Nonzero means `char' should be signed. */
247 int flag_signed_char
;
249 /* Nonzero means give an enum type only as many bytes as it needs. A value
250 of 2 means it has not yet been initialized. */
252 int flag_short_enums
;
254 /* Nonzero if structures and unions should be returned in memory.
256 This should only be defined if compatibility with another compiler or
257 with an ABI is needed, because it results in slower code. */
259 #ifndef DEFAULT_PCC_STRUCT_RETURN
260 #define DEFAULT_PCC_STRUCT_RETURN 1
263 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
265 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
267 /* 0 means straightforward implementation of complex divide acceptable.
268 1 means wide ranges of inputs must work for complex divide.
269 2 means C99-like requirements for complex divide (not yet implemented). */
271 int flag_complex_divide_method
= 0;
273 /* Nonzero means performs web construction pass. When flag_web ==
274 AUTODETECT_FLAG_VAR_TRACKING it will be set according to optimize
275 and default_debug_hooks in process_options (). */
277 int flag_web
= AUTODETECT_FLAG_VAR_TRACKING
;
279 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
280 not just because the tree inliner turned us off. */
282 int flag_really_no_inline
= 2;
284 /* Nonzero means we should be saving declaration info into a .X file. */
286 int flag_gen_aux_info
= 0;
288 /* Specified name of aux-info file. */
290 const char *aux_info_file_name
;
292 /* Nonzero if we are compiling code for a shared library, zero for
297 /* Set to the default thread-local storage (tls) model to use. */
299 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
301 /* Nonzero means change certain warnings into errors.
302 Usually these are warnings about failure to conform to some standard. */
304 int flag_pedantic_errors
= 0;
306 /* -dA causes debug commentary information to be produced in
307 the generated assembly code (to make it more readable). This option
308 is generally only of use to those who actually need to read the
309 generated assembly code (perhaps while debugging the compiler itself).
310 Currently, this switch is only used by dwarfout.c; however, it is intended
311 to be a catchall for printing debug information in the assembler file. */
313 int flag_debug_asm
= 0;
315 /* -dP causes the rtl to be emitted as a comment in assembly. */
317 int flag_dump_rtl_in_asm
= 0;
319 /* When non-NULL, indicates that whenever space is allocated on the
320 stack, the resulting stack pointer must not pass this
321 address---that is, for stacks that grow downward, the stack pointer
322 must always be greater than or equal to this address; for stacks
323 that grow upward, the stack pointer must be less than this address.
324 At present, the rtx may be either a REG or a SYMBOL_REF, although
325 the support provided depends on the backend. */
328 /* If one, renumber instruction UIDs to reduce the number of
329 unused UIDs if there are a lot of instructions. If greater than
330 one, unconditionally renumber instruction UIDs. */
331 int flag_renumber_insns
= 1;
333 /* Nonzero if we should track variables. When
334 flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING it will be set according
335 to optimize, debug_info_level and debug_hooks in process_options (). */
336 int flag_var_tracking
= AUTODETECT_FLAG_VAR_TRACKING
;
338 /* True if the user has tagged the function with the 'section'
341 bool user_defined_section_attribute
= false;
343 /* Values of the -falign-* flags: how much to align labels in code.
344 0 means `use default', 1 means `don't align'.
345 For each variable, there is an _log variant which is the power
346 of two not less than the variable, for .align output. */
349 int align_loops_max_skip
;
351 int align_jumps_max_skip
;
352 int align_labels_log
;
353 int align_labels_max_skip
;
354 int align_functions_log
;
356 /* Like align_functions_log above, but used by front-ends to force the
357 minimum function alignment. Zero means no alignment is forced. */
358 int force_align_functions_log
;
362 const char *const string
;
366 lang_independent_options
;
368 /* Nonzero if subexpressions must be evaluated from left-to-right. */
369 int flag_evaluation_order
= 0;
371 /* The user symbol prefix after having resolved same. */
372 const char *user_label_prefix
;
374 static const param_info lang_independent_params
[] = {
375 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
376 { OPTION, DEFAULT, HELP },
377 #include "params.def"
382 /* Here is a table, controlled by the tm.h file, listing each -m switch
383 and which bits in `target_switches' it should set or clear.
384 If VALUE is positive, it is bits to set.
385 If VALUE is negative, -VALUE is bits to clear.
386 (The sign bit is not used so there is no confusion.) */
390 const char *const name
;
392 const char *const description
;
394 target_switches
[] = TARGET_SWITCHES
;
396 /* This table is similar, but allows the switch to have a value. */
398 #ifdef TARGET_OPTIONS
401 const char *const prefix
;
402 const char **const variable
;
403 const char *const description
;
404 const char *const value
;
406 target_options
[] = TARGET_OPTIONS
;
409 /* Nonzero means warn about function definitions that default the return type
410 or that use a null return and have a return-type other than void. */
412 int warn_return_type
;
414 /* Output files for assembler code (real compiler output)
415 and debugging dumps. */
419 FILE *dump_file
= NULL
;
420 char *dump_file_name
;
422 /* The current working directory of a translation. It's generally the
423 directory from which compilation was initiated, but a preprocessed
424 file may specify the original directory in which it was
427 static const char *src_pwd
;
429 /* Initialize src_pwd with the given string, and return true. If it
430 was already initialized, return false. As a special case, it may
431 be called with a NULL argument to test whether src_pwd has NOT been
435 set_src_pwd (const char *pwd
)
439 if (strcmp (src_pwd
, pwd
) == 0)
445 src_pwd
= xstrdup (pwd
);
449 /* Return the directory from which the translation unit was initiated,
450 in case set_src_pwd() was not called before to assign it a
462 /* Called when the start of a function definition is parsed,
463 this function prints on stderr the name of the function. */
465 announce_function (tree decl
)
469 if (rtl_dump_and_exit
)
470 verbatim ("%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
472 verbatim (" %s", lang_hooks
.decl_printable_name (decl
, 2));
474 pp_needs_newline (global_dc
->printer
) = true;
475 diagnostic_set_last_function (global_dc
);
479 /* Set up a default flag_random_seed and local_tick, unless the user
480 already specified one. */
485 if (!flag_random_seed
)
487 unsigned HOST_WIDE_INT value
;
488 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
490 /* Get some more or less random data. */
491 #ifdef HAVE_GETTIMEOFDAY
495 gettimeofday (&tv
, NULL
);
496 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
500 time_t now
= time (NULL
);
502 if (now
!= (time_t)-1)
503 local_tick
= (unsigned) now
;
506 value
= local_tick
^ getpid ();
508 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
509 flag_random_seed
= random_seed
;
511 else if (!local_tick
)
516 /* Decode the string P as an integral parameter.
517 If the string is indeed an integer return its numeric value else
518 issue an Invalid Option error for the option PNAME and return DEFVAL.
519 If PNAME is zero just return DEFVAL, do not call error. */
522 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
524 const char *endp
= p
;
537 error ("invalid option argument %qs", pname
);
544 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
545 If X is 0, return -1.
547 This should be used via the floor_log2 macro. */
550 floor_log2_wide (unsigned HOST_WIDE_INT x
)
555 if (sizeof (HOST_WIDE_INT
) * 8 > 64)
556 if (x
>= (unsigned HOST_WIDE_INT
) 1 << (t
+ 64))
558 if (sizeof (HOST_WIDE_INT
) * 8 > 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))
574 /* Return the logarithm of X, base 2, considering X unsigned,
575 if X is a power of 2. Otherwise, returns -1.
577 This should be used via the `exact_log2' macro. */
580 exact_log2_wide (unsigned HOST_WIDE_INT x
)
582 /* Test for 0 or a power of 2. */
583 if (x
== 0 || x
!= (x
& -x
))
585 return floor_log2_wide (x
);
588 /* Handler for fatal signals, such as SIGSEGV. These are transformed
589 into ICE messages, which is much more user friendly. In case the
590 error printer crashes, reset the signal to prevent infinite recursion. */
593 crash_signal (int signo
)
595 signal (signo
, SIG_DFL
);
597 /* If we crashed while processing an ASM statement, then be a little more
598 graceful. It's most likely the user's fault. */
599 if (this_is_asm_operands
)
601 output_operand_lossage ("unrecoverable error");
602 exit (FATAL_EXIT_CODE
);
605 internal_error ("%s", strsignal (signo
));
608 /* Arrange to dump core on error. (The regular error message is still
609 printed first, except in the case of abort().) */
612 setup_core_dumping (void)
615 signal (SIGABRT
, SIG_DFL
);
617 #if defined(HAVE_SETRLIMIT)
620 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
621 fatal_error ("getting core file size maximum limit: %m");
622 rlim
.rlim_cur
= rlim
.rlim_max
;
623 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
624 fatal_error ("setting core file size limit to maximum: %m");
627 diagnostic_abort_on_error (global_dc
);
631 /* Strip off a legitimate source ending from the input string NAME of
632 length LEN. Rather than having to know the names used by all of
633 our front ends, we strip off an ending of a period followed by
634 up to five characters. (Java uses ".class".) */
637 strip_off_ending (char *name
, int len
)
640 for (i
= 2; i
< 6 && len
> i
; i
++)
642 if (name
[len
- i
] == '.')
644 name
[len
- i
] = '\0';
650 /* Output a quoted string. */
653 output_quoted_string (FILE *asm_file
, const char *string
)
655 #ifdef OUTPUT_QUOTED_STRING
656 OUTPUT_QUOTED_STRING (asm_file
, string
);
660 putc ('\"', asm_file
);
661 while ((c
= *string
++) != 0)
665 if (c
== '\"' || c
== '\\')
666 putc ('\\', asm_file
);
670 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
672 putc ('\"', asm_file
);
676 /* Output a file name in the form wanted by System V. */
679 output_file_directive (FILE *asm_file
, const char *input_name
)
684 if (input_name
== NULL
)
685 input_name
= "<stdin>";
687 len
= strlen (input_name
);
688 na
= input_name
+ len
;
690 /* NA gets INPUT_NAME sans directory names. */
691 while (na
> input_name
)
693 if (IS_DIR_SEPARATOR (na
[-1]))
698 #ifdef ASM_OUTPUT_SOURCE_FILENAME
699 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
701 fprintf (asm_file
, "\t.file\t");
702 output_quoted_string (asm_file
, na
);
703 fputc ('\n', asm_file
);
707 /* Do any final processing required for the declarations in VEC, of
708 which there are LEN. We write out inline functions and variables
709 that have been deferred until this point, but which are required.
710 Returns nonzero if anything was put out. */
713 wrapup_global_declarations (tree
*vec
, int len
)
718 int output_something
= 0;
720 for (i
= 0; i
< len
; i
++)
724 /* We're not deferring this any longer. Assignment is
725 conditional to avoid needlessly dirtying PCH pages. */
726 if (DECL_DEFER_OUTPUT (decl
) != 0)
727 DECL_DEFER_OUTPUT (decl
) = 0;
729 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
730 lang_hooks
.finish_incomplete_decl (decl
);
733 /* Now emit any global variables or functions that we have been
734 putting off. We need to loop in case one of the things emitted
735 here references another one which comes earlier in the list. */
739 for (i
= 0; i
< len
; i
++)
743 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
746 /* Don't write out static consts, unless we still need them.
748 We also keep static consts if not optimizing (for debugging),
749 unless the user specified -fno-keep-static-consts.
750 ??? They might be better written into the debug information.
751 This is possible when using DWARF.
753 A language processor that wants static constants to be always
754 written out (even if it is not used) is responsible for
755 calling rest_of_decl_compilation itself. E.g. the C front-end
756 calls rest_of_decl_compilation from finish_decl.
757 One motivation for this is that is conventional in some
758 environments to write things like:
759 static const char rcsid[] = "... version string ...";
760 intending to force the string to be in the executable.
762 A language processor that would prefer to have unneeded
763 static constants "optimized away" would just defer writing
764 them out until here. E.g. C++ does this, because static
765 constants are often defined in header files.
767 ??? A tempting alternative (for both C and C++) would be
768 to force a constant to be written if and only if it is
769 defined in a main file, as opposed to an include file. */
771 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
773 struct cgraph_varpool_node
*node
;
775 node
= cgraph_varpool_node (decl
);
777 if (flag_unit_at_a_time
&& node
->finalized
)
779 else if ((flag_unit_at_a_time
&& !cgraph_global_info_ready
)
781 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
783 else if (node
->needed
)
785 else if (DECL_COMDAT (decl
))
787 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
788 && (optimize
|| !flag_keep_static_consts
789 || DECL_ARTIFICIAL (decl
)))
795 rest_of_decl_compilation (decl
, 1, 1);
801 output_something
= 1;
805 return output_something
;
808 /* Issue appropriate warnings for the global declarations in VEC (of
809 which there are LEN). Output debugging information for them. */
812 check_global_declarations (tree
*vec
, int len
)
817 for (i
= 0; i
< len
; i
++)
821 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
822 && ! TREE_ASM_WRITTEN (decl
))
823 /* Cancel the RTL for this decl so that, if debugging info
824 output for global variables is still to come,
825 this one will be omitted. */
826 SET_DECL_RTL (decl
, NULL_RTX
);
828 /* Warn about any function
829 declared static but not defined.
830 We don't warn about variables,
831 because many programs have static variables
832 that exist only to get some text into the object file. */
833 if (TREE_CODE (decl
) == FUNCTION_DECL
834 && DECL_INITIAL (decl
) == 0
835 && DECL_EXTERNAL (decl
)
836 && ! DECL_ARTIFICIAL (decl
)
837 && ! TREE_NO_WARNING (decl
)
838 && ! TREE_PUBLIC (decl
)
839 && (warn_unused_function
840 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
842 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
843 pedwarn ("%J%qF used but never defined", decl
, decl
);
845 warning ("%J%qF declared %<static%> but never defined",
847 /* This symbol is effectively an "extern" declaration now. */
848 TREE_PUBLIC (decl
) = 1;
849 assemble_external (decl
);
852 /* Warn about static fns or vars defined but not used. */
853 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
854 /* We don't warn about "static const" variables because the
855 "rcs_id" idiom uses that construction. */
856 || (warn_unused_variable
857 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
858 && ! DECL_IN_SYSTEM_HEADER (decl
)
859 && ! TREE_USED (decl
)
860 /* The TREE_USED bit for file-scope decls is kept in the identifier,
861 to handle multiple external decls in different scopes. */
862 && ! TREE_USED (DECL_NAME (decl
))
863 && ! DECL_EXTERNAL (decl
)
864 && ! TREE_PUBLIC (decl
)
865 /* A volatile variable might be used in some non-obvious way. */
866 && ! TREE_THIS_VOLATILE (decl
)
867 /* Global register variables must be declared to reserve them. */
868 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
869 /* Otherwise, ask the language. */
870 && lang_hooks
.decls
.warn_unused_global (decl
))
871 warning ("%J%qD defined but not used", decl
, decl
);
873 /* Avoid confusing the debug information machinery when there are
875 if (errorcount
== 0 && sorrycount
== 0)
877 timevar_push (TV_SYMOUT
);
878 (*debug_hooks
->global_decl
) (decl
);
879 timevar_pop (TV_SYMOUT
);
884 /* Warn about a use of an identifier which was marked deprecated. */
886 warn_deprecated_use (tree node
)
888 if (node
== 0 || !warn_deprecated_decl
)
893 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
894 warning ("%qs is deprecated (declared at %s:%d)",
895 IDENTIFIER_POINTER (DECL_NAME (node
)),
896 xloc
.file
, xloc
.line
);
898 else if (TYPE_P (node
))
900 const char *what
= NULL
;
901 tree decl
= TYPE_STUB_DECL (node
);
903 if (TYPE_NAME (node
))
905 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
906 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
907 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
908 && DECL_NAME (TYPE_NAME (node
)))
909 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
914 expanded_location xloc
915 = expand_location (DECL_SOURCE_LOCATION (decl
));
917 warning ("%qs is deprecated (declared at %s:%d)", what
,
918 xloc
.file
, xloc
.line
);
920 warning ("type is deprecated (declared at %s:%d)",
921 xloc
.file
, xloc
.line
);
926 warning ("%qs is deprecated", what
);
928 warning ("type is deprecated");
933 /* Save the current INPUT_LOCATION on the top entry in the
934 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
935 INPUT_LOCATION accordingly. */
938 #ifdef USE_MAPPED_LOCATION
939 push_srcloc (location_t fline
)
941 push_srcloc (const char *file
, int line
)
944 struct file_stack
*fs
;
946 fs
= xmalloc (sizeof (struct file_stack
));
947 fs
->location
= input_location
;
948 fs
->next
= input_file_stack
;
949 #ifdef USE_MAPPED_LOCATION
950 input_location
= fline
;
952 input_filename
= file
;
955 input_file_stack
= fs
;
956 input_file_stack_tick
++;
959 /* Pop the top entry off the stack of presently open source files.
960 Restore the INPUT_LOCATION from the new topmost entry on the
966 struct file_stack
*fs
;
968 fs
= input_file_stack
;
969 input_location
= fs
->location
;
970 input_file_stack
= fs
->next
;
972 input_file_stack_tick
++;
975 /* Compile an entire translation unit. Write a file of assembly
976 output and various debugging dumps. */
981 /* Initialize yet another pass. */
984 init_final (main_input_filename
);
985 coverage_init (aux_base_name
);
987 timevar_push (TV_PARSE
);
989 /* Call the parser, which parses the entire file (calling
990 rest_of_compilation for each function). */
991 lang_hooks
.parse_file (set_yydebug
);
993 /* In case there were missing block closers,
994 get us back to the global binding level. */
995 lang_hooks
.clear_binding_stack ();
997 /* Compilation is now finished except for writing
998 what's left of the symbol table output. */
999 timevar_pop (TV_PARSE
);
1001 if (flag_syntax_only
)
1004 lang_hooks
.decls
.final_write_globals ();
1006 cgraph_varpool_assemble_pending_decls ();
1008 /* This must occur after the loop to output deferred functions.
1009 Else the coverage initializer would not be emitted if all the
1010 functions in this compilation unit were deferred. */
1013 /* Write out any pending weak symbol declarations. */
1017 /* Do dbx symbols. */
1018 timevar_push (TV_SYMOUT
);
1020 #ifdef DWARF2_UNWIND_INFO
1021 if (dwarf2out_do_frame ())
1022 dwarf2out_frame_finish ();
1025 (*debug_hooks
->finish
) (main_input_filename
);
1026 timevar_pop (TV_SYMOUT
);
1028 /* Output some stuff at end of file if nec. */
1030 dw2_output_indirect_constants ();
1032 /* Attach a special .ident directive to the end of the file to identify
1033 the version of GCC which compiled this code. The format of the .ident
1034 string is patterned after the ones produced by native SVR4 compilers. */
1037 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
1038 IDENT_ASM_OP
, version_string
);
1041 /* This must be at the end. Some target ports emit end of file directives
1042 into the assembly file here, and hence we can not output anything to the
1043 assembly file after this point. */
1044 targetm
.asm_out
.file_end ();
1047 /* Display help for target options. */
1049 display_target_options (void)
1052 static bool displayed
= false;
1054 /* Avoid double printing for --help --target-help. */
1060 if (ARRAY_SIZE (target_switches
) > 1
1061 #ifdef TARGET_OPTIONS
1062 || ARRAY_SIZE (target_options
) > 1
1070 printf (_("\nTarget specific options:\n"));
1072 for (i
= ARRAY_SIZE (target_switches
); i
--;)
1074 const char *option
= target_switches
[i
].name
;
1075 const char *description
= target_switches
[i
].description
;
1077 if (option
== NULL
|| *option
== 0)
1079 else if (description
== NULL
)
1084 printf (_(" -m%-23s [undocumented]\n"), option
);
1086 else if (*description
!= 0)
1087 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1090 #ifdef TARGET_OPTIONS
1091 for (i
= ARRAY_SIZE (target_options
); i
--;)
1093 const char *option
= target_options
[i
].prefix
;
1094 const char *description
= target_options
[i
].description
;
1096 if (option
== NULL
|| *option
== 0)
1098 else if (description
== NULL
)
1103 printf (_(" -m%-23s [undocumented]\n"), option
);
1105 else if (*description
!= 0)
1106 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1112 printf (_("\nThere are undocumented target specific options as well.\n"));
1114 printf (_(" They exist, but they are not documented.\n"));
1119 /* Parse a -d... command line switch. */
1122 decode_d_option (const char *arg
)
1133 flag_print_asm_name
= 1;
1136 flag_dump_rtl_in_asm
= 1;
1137 flag_print_asm_name
= 1;
1140 graph_dump_format
= vcg
;
1143 rtl_dump_and_exit
= 1;
1148 case 'D': /* These are handled by the preprocessor. */
1152 setup_core_dumping();
1157 if (!enable_rtl_dump_file (c
))
1158 warning ("unrecognized gcc debugging option: %c", c
);
1163 /* Indexed by enum debug_info_type. */
1164 const char *const debug_type_names
[] =
1166 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff", "vms"
1169 /* Decode -m switches. */
1170 /* Decode the switch -mNAME. */
1173 set_target_switch (const char *name
)
1176 int valid_target_option
= 0;
1178 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1179 if (!strcmp (target_switches
[j
].name
, name
))
1181 if (target_switches
[j
].value
< 0)
1182 target_flags
&= ~-target_switches
[j
].value
;
1184 target_flags
|= target_switches
[j
].value
;
1187 if (target_switches
[j
].value
< 0)
1188 target_flags_explicit
|= -target_switches
[j
].value
;
1190 target_flags_explicit
|= target_switches
[j
].value
;
1192 valid_target_option
= 1;
1195 #ifdef TARGET_OPTIONS
1196 if (!valid_target_option
)
1197 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1199 int len
= strlen (target_options
[j
].prefix
);
1200 if (target_options
[j
].value
)
1202 if (!strcmp (target_options
[j
].prefix
, name
))
1204 *target_options
[j
].variable
= target_options
[j
].value
;
1205 valid_target_option
= 1;
1210 if (!strncmp (target_options
[j
].prefix
, name
, len
))
1212 *target_options
[j
].variable
= name
+ len
;
1213 valid_target_option
= 1;
1219 if (!valid_target_option
)
1220 error ("invalid option %qs", name
);
1223 /* Print version information to FILE.
1224 Each line begins with INDENT (for the case where FILE is the
1225 assembler output file). */
1228 print_version (FILE *file
, const char *indent
)
1231 #define __VERSION__ "[?]"
1235 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1237 "%s%s%s version %s (%s) compiled by CC.\n"
1239 , indent
, *indent
!= 0 ? " " : "",
1240 lang_hooks
.name
, version_string
, TARGET_NAME
,
1241 indent
, __VERSION__
);
1242 fnotice (file
, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1243 indent
, *indent
!= 0 ? " " : "",
1244 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1247 /* Print an option value and return the adjusted position in the line.
1248 ??? We don't handle error returns from fprintf (disk full); presumably
1249 other code will catch a disk full though. */
1252 print_single_switch (FILE *file
, int pos
, int max
,
1253 const char *indent
, const char *sep
, const char *term
,
1254 const char *type
, const char *name
)
1256 /* The ultrix fprintf returns 0 on success, so compute the result we want
1257 here since we need it for the following test. */
1258 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
1263 fprintf (file
, "%s", term
);
1268 fprintf (file
, "%s", indent
);
1269 pos
= strlen (indent
);
1271 fprintf (file
, "%s%s%s", sep
, type
, name
);
1276 /* Print active target switches to FILE.
1277 POS is the current cursor position and MAX is the size of a "line".
1278 Each line begins with INDENT and ends with TERM.
1279 Each switch is separated from the next by SEP. */
1282 print_switch_values (FILE *file
, int pos
, int max
,
1283 const char *indent
, const char *sep
, const char *term
)
1288 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1289 that it can be printed below. This helps reproducibility. */
1292 /* Print the options as passed. */
1293 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
1294 _("options passed: "), "");
1296 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1300 if (strcmp (*p
, "-o") == 0)
1306 if (strcmp (*p
, "-quiet") == 0)
1308 if (strcmp (*p
, "-version") == 0)
1313 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
1316 fprintf (file
, "%s", term
);
1318 /* Print the -f and -m options that have been enabled.
1319 We don't handle language specific options but printing argv
1322 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
1323 _("options enabled: "), "");
1325 for (j
= 0; j
< cl_options_count
; j
++)
1327 if (!cl_options
[j
].flag_var
1328 || !(cl_options
[j
].flags
& CL_REPORT
))
1331 if (cl_options
[j
].has_set_value
)
1333 if (*cl_options
[j
].flag_var
!= cl_options
[j
].set_value
)
1338 if (!*cl_options
[j
].flag_var
)
1342 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1343 "", cl_options
[j
].opt_text
);
1346 /* Print target specific options. */
1348 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1349 if (target_switches
[j
].name
[0] != '\0'
1350 && target_switches
[j
].value
> 0
1351 && ((target_switches
[j
].value
& target_flags
)
1352 == target_switches
[j
].value
))
1354 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1355 "-m", target_switches
[j
].name
);
1358 #ifdef TARGET_OPTIONS
1359 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1360 if (*target_options
[j
].variable
!= NULL
)
1363 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
1364 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1365 prefix
, *target_options
[j
].variable
);
1369 fprintf (file
, "%s", term
);
1372 /* Open assembly code output file. Do this even if -fsyntax-only is
1373 on, because then the driver will have provided the name of a
1374 temporary file or bit bucket for us. NAME is the file specified on
1375 the command line, possibly NULL. */
1377 init_asm_output (const char *name
)
1379 if (name
== NULL
&& asm_file_name
== 0)
1380 asm_out_file
= stdout
;
1383 if (asm_file_name
== 0)
1385 int len
= strlen (dump_base_name
);
1386 char *dumpname
= xmalloc (len
+ 6);
1387 memcpy (dumpname
, dump_base_name
, len
+ 1);
1388 strip_off_ending (dumpname
, len
);
1389 strcat (dumpname
, ".s");
1390 asm_file_name
= dumpname
;
1392 if (!strcmp (asm_file_name
, "-"))
1393 asm_out_file
= stdout
;
1395 asm_out_file
= fopen (asm_file_name
, "w+b");
1396 if (asm_out_file
== 0)
1397 fatal_error ("can%'t open %s for writing: %m", asm_file_name
);
1400 #ifdef IO_BUFFER_SIZE
1401 setvbuf (asm_out_file
, xmalloc (IO_BUFFER_SIZE
),
1402 _IOFBF
, IO_BUFFER_SIZE
);
1405 if (!flag_syntax_only
)
1407 targetm
.asm_out
.file_start ();
1409 #ifdef ASM_COMMENT_START
1410 if (flag_verbose_asm
)
1412 /* Print the list of options in effect. */
1413 print_version (asm_out_file
, ASM_COMMENT_START
);
1414 print_switch_values (asm_out_file
, 0, MAX_LINE
,
1415 ASM_COMMENT_START
, " ", "\n");
1416 /* Add a blank line here so it appears in assembler output but not
1418 fprintf (asm_out_file
, "\n");
1424 /* Default version of get_pch_validity.
1425 By default, every flag difference is fatal; that will be mostly right for
1426 most targets, but completely right for very few. */
1429 default_get_pch_validity (size_t *len
)
1431 #ifdef TARGET_OPTIONS
1436 *len
= sizeof (target_flags
) + 2;
1437 #ifdef TARGET_OPTIONS
1438 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1441 if (*target_options
[i
].variable
)
1442 *len
+= strlen (*target_options
[i
].variable
);
1446 result
= r
= xmalloc (*len
);
1450 memcpy (r
, &target_flags
, sizeof (target_flags
));
1451 r
+= sizeof (target_flags
);
1453 #ifdef TARGET_OPTIONS
1454 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1456 const char *str
= *target_options
[i
].variable
;
1460 l
= strlen (str
) + 1;
1469 /* Default version of pch_valid_p. */
1472 default_pch_valid_p (const void *data_p
, size_t len
)
1474 const char *data
= (const char *)data_p
;
1475 const char *flag_that_differs
= NULL
;
1478 /* -fpic and -fpie also usually make a PCH invalid. */
1479 if (data
[0] != flag_pic
)
1480 return _("created and used with different settings of -fpic");
1481 if (data
[1] != flag_pie
)
1482 return _("created and used with different settings of -fpie");
1485 /* Check target_flags. */
1486 if (memcmp (data
, &target_flags
, sizeof (target_flags
)) != 0)
1488 for (i
= 0; i
< ARRAY_SIZE (target_switches
); i
++)
1493 memcpy (&tf
, data
, sizeof (target_flags
));
1495 bits
= target_switches
[i
].value
;
1498 if ((target_flags
& bits
) != (tf
& bits
))
1500 flag_that_differs
= target_switches
[i
].name
;
1506 data
+= sizeof (target_flags
);
1507 len
-= sizeof (target_flags
);
1509 /* Check string options. */
1510 #ifdef TARGET_OPTIONS
1511 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
1513 const char *str
= *target_options
[i
].variable
;
1517 l
= strlen (str
) + 1;
1518 if (len
< l
|| memcmp (data
, str
, l
) != 0)
1520 flag_that_differs
= target_options
[i
].prefix
;
1533 asprintf (&r
, _("created and used with differing settings of '-m%s'"),
1536 return _("out of memory");
1541 /* Default tree printer. Handles declarations only. */
1543 default_tree_printer (pretty_printer
* pp
, text_info
*text
)
1545 switch (*text
->format_spec
)
1551 tree t
= va_arg (*text
->args_ptr
, tree
);
1552 const char *n
= DECL_NAME (t
)
1553 ? lang_hooks
.decl_printable_name (t
, 2)
1564 /* Initialization of the front end environment, before command line
1565 options are parsed. Signal handlers, internationalization etc.
1566 ARGV0 is main's argv[0]. */
1568 general_init (const char *argv0
)
1572 p
= argv0
+ strlen (argv0
);
1573 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
1577 xmalloc_set_program_name (progname
);
1581 gcc_init_libintl ();
1583 /* Initialize the diagnostics reporting machinery, so option parsing
1584 can give warnings and errors. */
1585 diagnostic_initialize (global_dc
);
1586 /* Set a default printer. Language specific initializations will
1587 override it later. */
1588 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
1590 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1592 signal (SIGSEGV
, crash_signal
);
1595 signal (SIGILL
, crash_signal
);
1598 signal (SIGBUS
, crash_signal
);
1601 signal (SIGABRT
, crash_signal
);
1603 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1604 signal (SIGIOT
, crash_signal
);
1607 signal (SIGFPE
, crash_signal
);
1610 /* Other host-specific signal setup. */
1611 (*host_hooks
.extra_signals
)();
1613 /* Initialize the garbage-collector, string pools and tree type hash
1617 linemap_init (&line_table
);
1620 /* Initialize register usage now so switches may override. */
1623 /* Register the language-independent parameters. */
1624 add_params (lang_independent_params
, LAST_PARAM
);
1626 /* This must be done after add_params but before argument processing. */
1627 init_ggc_heuristics();
1628 init_tree_optimization_passes ();
1631 /* Process the options that have been parsed. */
1633 process_options (void)
1635 /* Allow the front end to perform consistency checks and do further
1636 initialization based on the command line options. This hook also
1637 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1638 so we can correctly initialize debug output. */
1639 no_backend
= lang_hooks
.post_options (&main_input_filename
);
1640 #ifndef USE_MAPPED_LOCATION
1641 input_filename
= main_input_filename
;
1644 #ifdef OVERRIDE_OPTIONS
1645 /* Some machines may reject certain combinations of options. */
1649 if (flag_short_enums
== 2)
1650 flag_short_enums
= targetm
.default_short_enums ();
1652 /* Set aux_base_name if not already set. */
1655 else if (main_input_filename
)
1657 char *name
= xstrdup (lbasename (main_input_filename
));
1659 strip_off_ending (name
, strlen (name
));
1660 aux_base_name
= name
;
1663 aux_base_name
= "gccaux";
1665 /* Set up the align_*_log variables, defaulting them to 1 if they
1666 were still unset. */
1667 if (align_loops
<= 0) align_loops
= 1;
1668 if (align_loops_max_skip
> align_loops
|| !align_loops
)
1669 align_loops_max_skip
= align_loops
- 1;
1670 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
1671 if (align_jumps
<= 0) align_jumps
= 1;
1672 if (align_jumps_max_skip
> align_jumps
|| !align_jumps
)
1673 align_jumps_max_skip
= align_jumps
- 1;
1674 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
1675 if (align_labels
<= 0) align_labels
= 1;
1676 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
1677 if (align_labels_max_skip
> align_labels
|| !align_labels
)
1678 align_labels_max_skip
= align_labels
- 1;
1679 if (align_functions
<= 0) align_functions
= 1;
1680 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
1682 /* Unrolling all loops implies that standard loop unrolling must also
1684 if (flag_unroll_all_loops
)
1685 flag_unroll_loops
= 1;
1687 /* The loop unrolling code assumes that cse will be run after loop. */
1688 if (flag_unroll_loops
|| flag_peel_loops
)
1689 flag_rerun_cse_after_loop
= 1;
1691 /* If explicitly asked to run new loop optimizer, switch off the old
1693 if (flag_loop_optimize2
)
1694 flag_loop_optimize
= 0;
1696 /* Enable new loop optimizer pass if any of its optimizations is called. */
1697 if (flag_move_loop_invariants
1698 || flag_unswitch_loops
1700 || flag_unroll_loops
1701 || flag_branch_on_count_reg
)
1702 flag_loop_optimize2
= 1;
1704 if (flag_non_call_exceptions
)
1705 flag_asynchronous_unwind_tables
= 1;
1706 if (flag_asynchronous_unwind_tables
)
1707 flag_unwind_tables
= 1;
1709 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1711 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
1712 flag_unit_at_a_time
= 0;
1714 if (flag_value_profile_transformations
)
1715 flag_profile_values
= 1;
1717 /* Speculative prefetching implies the value profiling. We also switch off
1718 the prefetching in the loop optimizer, so that we do not emit double
1719 prefetches. TODO -- we should teach these two to cooperate; the loop
1720 based prefetching may sometimes do a better job, especially in connection
1721 with reuse analysis. */
1722 if (flag_speculative_prefetching
)
1724 flag_profile_values
= 1;
1725 flag_prefetch_loop_arrays
= 0;
1728 /* Warn about options that are not supported on this machine. */
1729 #ifndef INSN_SCHEDULING
1730 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
1731 warning ("instruction scheduling not supported on this target machine");
1734 if (flag_delayed_branch
)
1735 warning ("this target machine does not have delayed branches");
1738 if (flag_tree_based_profiling
&& flag_profile_values
)
1739 sorry ("value-based profiling not yet implemented in trees.");
1741 user_label_prefix
= USER_LABEL_PREFIX
;
1742 if (flag_leading_underscore
!= -1)
1744 /* If the default prefix is more complicated than "" or "_",
1745 issue a warning and ignore this option. */
1746 if (user_label_prefix
[0] == 0 ||
1747 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
1749 user_label_prefix
= flag_leading_underscore
? "_" : "";
1752 warning ("-f%sleading-underscore not supported on this target machine",
1753 flag_leading_underscore
? "" : "no-");
1756 /* If we are in verbose mode, write out the version and maybe all the
1757 option flags in use. */
1760 print_version (stderr
, "");
1762 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
1765 if (flag_syntax_only
)
1767 write_symbols
= NO_DEBUG
;
1771 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1773 if (debug_info_level
== DINFO_LEVEL_NONE
)
1774 write_symbols
= NO_DEBUG
;
1776 /* Now we know write_symbols, set up the debug hooks based on it.
1777 By default we do nothing for debug output. */
1778 if (PREFERRED_DEBUGGING_TYPE
== NO_DEBUG
)
1779 default_debug_hooks
= &do_nothing_debug_hooks
;
1780 #if defined(DBX_DEBUGGING_INFO)
1781 else if (PREFERRED_DEBUGGING_TYPE
== DBX_DEBUG
)
1782 default_debug_hooks
= &dbx_debug_hooks
;
1784 #if defined(XCOFF_DEBUGGING_INFO)
1785 else if (PREFERRED_DEBUGGING_TYPE
== XCOFF_DEBUG
)
1786 default_debug_hooks
= &xcoff_debug_hooks
;
1788 #ifdef SDB_DEBUGGING_INFO
1789 else if (PREFERRED_DEBUGGING_TYPE
== SDB_DEBUG
)
1790 default_debug_hooks
= &sdb_debug_hooks
;
1792 #ifdef DWARF2_DEBUGGING_INFO
1793 else if (PREFERRED_DEBUGGING_TYPE
== DWARF2_DEBUG
)
1794 default_debug_hooks
= &dwarf2_debug_hooks
;
1796 #ifdef VMS_DEBUGGING_INFO
1797 else if (PREFERRED_DEBUGGING_TYPE
== VMS_DEBUG
1798 || PREFERRED_DEBUGGING_TYPE
== VMS_AND_DWARF2_DEBUG
)
1799 default_debug_hooks
= &vmsdbg_debug_hooks
;
1802 debug_hooks
= &do_nothing_debug_hooks
;
1803 if (write_symbols
== NO_DEBUG
)
1805 #if defined(DBX_DEBUGGING_INFO)
1806 else if (write_symbols
== DBX_DEBUG
)
1807 debug_hooks
= &dbx_debug_hooks
;
1809 #if defined(XCOFF_DEBUGGING_INFO)
1810 else if (write_symbols
== XCOFF_DEBUG
)
1811 debug_hooks
= &xcoff_debug_hooks
;
1813 #ifdef SDB_DEBUGGING_INFO
1814 else if (write_symbols
== SDB_DEBUG
)
1815 debug_hooks
= &sdb_debug_hooks
;
1817 #ifdef DWARF2_DEBUGGING_INFO
1818 else if (write_symbols
== DWARF2_DEBUG
)
1819 debug_hooks
= &dwarf2_debug_hooks
;
1821 #ifdef VMS_DEBUGGING_INFO
1822 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
1823 debug_hooks
= &vmsdbg_debug_hooks
;
1826 error ("target system does not support the \"%s\" debug format",
1827 debug_type_names
[write_symbols
]);
1829 /* Now we know which debug output will be used so we can set
1830 flag_var_tracking, flag_rename_registers and flag_web if the user has
1831 not specified them. */
1832 if (debug_info_level
< DINFO_LEVEL_NORMAL
1833 || debug_hooks
->var_location
== do_nothing_debug_hooks
.var_location
)
1835 if (flag_var_tracking
== 1)
1837 if (debug_info_level
< DINFO_LEVEL_NORMAL
)
1838 warning ("variable tracking requested, but useless unless "
1839 "producing debug info");
1841 warning ("variable tracking requested, but not supported "
1842 "by this debug format");
1844 flag_var_tracking
= 0;
1847 if (flag_rename_registers
== AUTODETECT_FLAG_VAR_TRACKING
)
1848 flag_rename_registers
= default_debug_hooks
->var_location
1849 != do_nothing_debug_hooks
.var_location
;
1851 if (flag_web
== AUTODETECT_FLAG_VAR_TRACKING
)
1852 flag_web
= optimize
>= 2 && (default_debug_hooks
->var_location
1853 != do_nothing_debug_hooks
.var_location
);
1855 if (flag_var_tracking
== AUTODETECT_FLAG_VAR_TRACKING
)
1856 flag_var_tracking
= optimize
>= 1;
1858 /* If auxiliary info generation is desired, open the output file.
1859 This goes in the same directory as the source file--unlike
1860 all the other output files. */
1861 if (flag_gen_aux_info
)
1863 aux_info_file
= fopen (aux_info_file_name
, "w");
1864 if (aux_info_file
== 0)
1865 fatal_error ("can%'t open %s: %m", aux_info_file_name
);
1868 if (! targetm
.have_named_sections
)
1870 if (flag_function_sections
)
1872 warning ("-ffunction-sections not supported for this target");
1873 flag_function_sections
= 0;
1875 if (flag_data_sections
)
1877 warning ("-fdata-sections not supported for this target");
1878 flag_data_sections
= 0;
1882 if (flag_function_sections
&& profile_flag
)
1884 warning ("-ffunction-sections disabled; it makes profiling impossible");
1885 flag_function_sections
= 0;
1888 #ifndef HAVE_prefetch
1889 if (flag_prefetch_loop_arrays
)
1891 warning ("-fprefetch-loop-arrays not supported for this target");
1892 flag_prefetch_loop_arrays
= 0;
1894 if (flag_speculative_prefetching
)
1896 if (flag_speculative_prefetching_set
)
1897 warning ("-fspeculative-prefetching not supported for this target");
1898 flag_speculative_prefetching
= 0;
1901 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
1903 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
1904 flag_prefetch_loop_arrays
= 0;
1906 if (flag_speculative_prefetching
&& !HAVE_prefetch
)
1908 if (flag_speculative_prefetching_set
)
1909 warning ("-fspeculative-prefetching not supported for this target (try -march switches)");
1910 flag_speculative_prefetching
= 0;
1914 /* This combination of options isn't handled for i386 targets and doesn't
1915 make much sense anyway, so don't allow it. */
1916 if (flag_prefetch_loop_arrays
&& optimize_size
)
1918 warning ("-fprefetch-loop-arrays is not supported with -Os");
1919 flag_prefetch_loop_arrays
= 0;
1922 #ifndef OBJECT_FORMAT_ELF
1923 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
1924 warning ("-ffunction-sections may affect debugging on some targets");
1927 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1928 if (flag_signaling_nans
)
1929 flag_trapping_math
= 1;
1932 /* Initialize the compiler back end. */
1936 init_adjust_machine_modes ();
1938 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
1939 || debug_info_level
== DINFO_LEVEL_VERBOSE
1940 #ifdef VMS_DEBUGGING_INFO
1941 /* Enable line number info for traceback. */
1942 || debug_info_level
> DINFO_LEVEL_NONE
1944 || flag_test_coverage
);
1947 init_fake_stack_mems ();
1951 init_function_once ();
1952 init_varasm_once ();
1954 /* The following initialization functions need to generate rtl, so
1955 provide a dummy function context for them. */
1956 init_dummy_function_start ();
1958 if (flag_caller_saves
)
1959 init_caller_save ();
1960 expand_dummy_function_end ();
1963 /* Language-dependent initialization. Returns nonzero on success. */
1965 lang_dependent_init (const char *name
)
1967 location_t save_loc
= input_location
;
1968 if (dump_base_name
== 0)
1969 dump_base_name
= name
&& name
[0] ? name
: "gccdump";
1971 /* Other front-end initialization. */
1972 #ifdef USE_MAPPED_LOCATION
1973 input_location
= BUILTINS_LOCATION
;
1975 input_filename
= "<built-in>";
1978 if (lang_hooks
.init () == 0)
1980 input_location
= save_loc
;
1982 init_asm_output (name
);
1984 /* These create various _DECL nodes, so need to be called after the
1985 front end is initialized. */
1989 /* The following initialization functions need to generate rtl, so
1990 provide a dummy function context for them. */
1991 init_dummy_function_start ();
1993 expand_dummy_function_end ();
1995 /* If dbx symbol table desired, initialize writing it and output the
1996 predefined types. */
1997 timevar_push (TV_SYMOUT
);
1999 #ifdef DWARF2_UNWIND_INFO
2000 if (dwarf2out_do_frame ())
2001 dwarf2out_frame_init ();
2004 /* Now we have the correct original filename, we can initialize
2006 (*debug_hooks
->init
) (name
);
2008 timevar_pop (TV_SYMOUT
);
2013 /* Clean up: close opened files, etc. */
2018 /* Close the dump files. */
2019 if (flag_gen_aux_info
)
2021 fclose (aux_info_file
);
2023 unlink (aux_info_file_name
);
2026 /* Close non-debugging input and output files. Take special care to note
2027 whether fclose returns an error, since the pages might still be on the
2028 buffer chain while the file is open. */
2032 if (ferror (asm_out_file
) != 0)
2033 fatal_error ("error writing to %s: %m", asm_file_name
);
2034 if (fclose (asm_out_file
) != 0)
2035 fatal_error ("error closing %s: %m", asm_file_name
);
2038 finish_optimization_passes ();
2042 ggc_print_statistics ();
2043 stringpool_statistics ();
2044 dump_tree_statistics ();
2045 dump_rtx_statistics ();
2046 dump_varray_statistics ();
2047 dump_alloc_pool_statistics ();
2048 dump_ggc_loc_statistics ();
2051 /* Free up memory for the benefit of leak detectors. */
2054 /* Language-specific end of compilation actions. */
2055 lang_hooks
.finish ();
2058 /* Initialize the compiler, and compile the input file. */
2062 /* Initialize timing first. The C front ends read the main file in
2063 the post_options hook, and C++ does file timings. */
2064 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2066 timevar_start (TV_TOTAL
);
2070 /* Don't do any more if an error has already occurred. */
2073 /* Set up the back-end if requested. */
2077 /* Language-dependent initialization. Returns true on success. */
2078 if (lang_dependent_init (main_input_filename
))
2084 /* Stop timing and print the times. */
2085 timevar_stop (TV_TOTAL
);
2086 timevar_print (stderr
);
2089 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2090 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2091 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2093 It is not safe to call this function more than once. */
2096 toplev_main (unsigned int argc
, const char **argv
)
2100 /* Initialization of GCC's environment, and diagnostics. */
2101 general_init (argv
[0]);
2103 /* Parse the options and do minimal processing; basically just
2104 enough to default flags appropriately. */
2105 decode_options (argc
, argv
);
2109 /* Exit early if we can (e.g. -help). */
2110 if (!exit_after_options
)
2113 if (errorcount
|| sorrycount
)
2114 return (FATAL_EXIT_CODE
);
2116 return (SUCCESS_EXIT_CODE
);