1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
25 /* This is the top level of cc1/c++.
26 It parses command args, opens files, invokes the various passes
27 in the proper order, and counts the time used by each.
28 Error messages and low-level interface to malloc also handled here. */
31 #undef FLOAT /* This is for hpux. They should change hpux. */
32 #undef FFS /* Some systems define this in param.h. */
34 #include "coretypes.h"
38 #ifdef HAVE_SYS_RESOURCE_H
39 # include <sys/resource.h>
42 #ifdef HAVE_SYS_TIMES_H
43 # include <sys/times.h>
53 #include "insn-attr.h"
54 #include "insn-config.h"
55 #include "insn-flags.h"
56 #include "hard-reg-set.h"
63 #include "basic-block.h"
69 #include "diagnostic.h"
72 #include "dwarf2asm.h"
73 #include "integrate.h"
77 #include "langhooks.h"
78 #include "cfglayout.h"
80 #include "hosthooks.h"
84 #include "value-prof.h"
85 #include "alloc-pool.h"
86 #include "tree-mudflap.h"
88 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
89 #include "dwarf2out.h"
92 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
96 #ifdef SDB_DEBUGGING_INFO
100 #ifdef XCOFF_DEBUGGING_INFO
101 #include "xcoffout.h" /* Needed for external data
102 declarations for e.g. AIX 4.x. */
105 static void general_init (const char *);
106 static void do_compile (void);
107 static void process_options (void);
108 static void backend_init (void);
109 static int lang_dependent_init (const char *);
110 static void init_asm_output (const char *);
111 static void finalize (void);
113 static void crash_signal (int) ATTRIBUTE_NORETURN;
114 static void setup_core_dumping (void);
115 static void compile_file (void);
117 static int print_single_switch (FILE *, int, int, const char *,
118 const char *, const char *,
119 const char *, const char *);
120 static void print_switch_values (FILE *, int, int, const char *,
121 const char *, const char *);
123 /* Nonzero to dump debug info whilst parsing (-dy option). */
124 static int set_yydebug;
126 /* True if we don't need a backend (e.g. preprocessing only). */
127 static bool no_backend;
129 /* Length of line when printing switch values. */
132 /* Name of program invoked, sans directories. */
134 const char *progname;
136 /* Copy of argument vector to toplev_main. */
137 static const char **save_argv;
139 /* Name of top-level original source file (what was input to cpp).
140 This comes from the #-command at the beginning of the actual input.
141 If there isn't any there, then this is the cc1 input file name. */
143 const char *main_input_filename;
145 #ifndef USE_MAPPED_LOCATION
146 location_t unknown_location = { NULL, 0 };
149 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
150 to optimize and default_debug_hooks in process_options (). */
151 #define AUTODETECT_VALUE 2
153 /* Current position in real source file. */
155 location_t input_location;
157 struct line_maps line_table;
159 /* Nonzero if it is unsafe to create any new pseudo registers. */
162 /* Stack of currently pending input files. */
164 struct file_stack *input_file_stack;
166 /* Incremented on each change to input_file_stack. */
167 int input_file_stack_tick;
169 /* Record of input_file_stack at each tick. */
170 typedef struct file_stack *fs_p;
172 DEF_VEC_ALLOC_P(fs_p,heap);
173 static VEC(fs_p,heap) *input_file_stack_history;
175 /* Whether input_file_stack has been restored to a previous state (in
176 which case there should be no more pushing). */
177 static bool input_file_stack_restored;
179 /* Name to use as base of names for dump output files. */
181 const char *dump_base_name;
183 /* Name to use as a base for auxiliary output files. */
185 const char *aux_base_name;
187 /* Bit flags that specify the machine subtype we are compiling for.
188 Bits are tested using macros TARGET_... defined in the tm.h file
189 and set by `-m...' switches. Must be defined in rtlanal.c. */
191 extern int target_flags;
193 /* A mask of target_flags that includes bit X if X was set or cleared
194 on the command line. */
196 int target_flags_explicit;
198 /* Debug hooks - dependent upon command line options. */
200 const struct gcc_debug_hooks *debug_hooks;
202 /* Debug hooks - target default. */
204 static const struct gcc_debug_hooks *default_debug_hooks;
206 /* Other flags saying which kinds of debugging dump have been requested. */
208 int rtl_dump_and_exit;
209 int flag_print_asm_name;
210 enum graph_dump_types graph_dump_format;
212 /* Name for output file of assembly code, specified with -o. */
214 const char *asm_file_name;
216 /* Nonzero means do optimizations. -O.
217 Particular numeric values stand for particular amounts of optimization;
218 thus, -O2 stores 2 here. However, the optimizations beyond the basic
219 ones are not controlled directly by this variable. Instead, they are
220 controlled by individual `flag_...' variables that are defaulted
221 based on this variable. */
225 /* Nonzero means optimize for size. -Os.
226 The only valid values are zero and nonzero. When optimize_size is
227 nonzero, optimize defaults to 2, but certain individual code
228 bloating optimizations are disabled. */
230 int optimize_size = 0;
232 /* The FUNCTION_DECL for the function currently being compiled,
233 or 0 if between functions. */
234 tree current_function_decl;
236 /* Set to the FUNC_BEGIN label of the current function, or NULL
238 const char * current_function_func_begin_label;
240 /* Temporarily suppress certain warnings.
241 This is set while reading code from a system header file. */
243 int in_system_header = 0;
245 /* Nonzero means to collect statistics which might be expensive
246 and to print them when we are done. */
247 int flag_detailed_statistics = 0;
249 /* A random sequence of characters, unless overridden by user. */
250 const char *flag_random_seed;
252 /* A local time stamp derived from the time of compilation. It will be
253 zero if the system cannot provide a time. It will be -1u, if the
254 user has specified a particular random seed. */
259 /* Nonzero means `char' should be signed. */
261 int flag_signed_char;
263 /* Nonzero means give an enum type only as many bytes as it needs. A value
264 of 2 means it has not yet been initialized. */
266 int flag_short_enums;
268 /* Nonzero if structures and unions should be returned in memory.
270 This should only be defined if compatibility with another compiler or
271 with an ABI is needed, because it results in slower code. */
273 #ifndef DEFAULT_PCC_STRUCT_RETURN
274 #define DEFAULT_PCC_STRUCT_RETURN 1
277 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
279 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
281 /* 0 means straightforward implementation of complex divide acceptable.
282 1 means wide ranges of inputs must work for complex divide.
283 2 means C99-like requirements for complex multiply and divide. */
285 int flag_complex_method = 1;
287 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
288 not just because the tree inliner turned us off. */
290 int flag_really_no_inline = 2;
292 /* Nonzero means we should be saving declaration info into a .X file. */
294 int flag_gen_aux_info = 0;
296 /* Specified name of aux-info file. */
298 const char *aux_info_file_name;
300 /* Nonzero if we are compiling code for a shared library, zero for
305 /* Generate code for GNU or NeXT Objective-C runtime environment. */
307 #ifdef NEXT_OBJC_RUNTIME
308 int flag_next_runtime = 1;
310 int flag_next_runtime = 0;
313 /* Set to the default thread-local storage (tls) model to use. */
315 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
317 /* Nonzero means change certain warnings into errors.
318 Usually these are warnings about failure to conform to some standard. */
320 int flag_pedantic_errors = 0;
322 /* -dA causes debug commentary information to be produced in
323 the generated assembly code (to make it more readable). This option
324 is generally only of use to those who actually need to read the
325 generated assembly code (perhaps while debugging the compiler itself).
326 Currently, this switch is only used by dwarfout.c; however, it is intended
327 to be a catchall for printing debug information in the assembler file. */
329 int flag_debug_asm = 0;
331 /* -dP causes the rtl to be emitted as a comment in assembly. */
333 int flag_dump_rtl_in_asm = 0;
335 /* When non-NULL, indicates that whenever space is allocated on the
336 stack, the resulting stack pointer must not pass this
337 address---that is, for stacks that grow downward, the stack pointer
338 must always be greater than or equal to this address; for stacks
339 that grow upward, the stack pointer must be less than this address.
340 At present, the rtx may be either a REG or a SYMBOL_REF, although
341 the support provided depends on the backend. */
344 /* If one, renumber instruction UIDs to reduce the number of
345 unused UIDs if there are a lot of instructions. If greater than
346 one, unconditionally renumber instruction UIDs. */
347 int flag_renumber_insns = 1;
349 /* Nonzero if we should track variables. When
350 flag_var_tracking == AUTODETECT_VALUE it will be set according
351 to optimize, debug_info_level and debug_hooks in process_options (). */
352 int flag_var_tracking = AUTODETECT_VALUE;
354 /* True if the user has tagged the function with the 'section'
357 bool user_defined_section_attribute = false;
359 /* Values of the -falign-* flags: how much to align labels in code.
360 0 means `use default', 1 means `don't align'.
361 For each variable, there is an _log variant which is the power
362 of two not less than the variable, for .align output. */
365 int align_loops_max_skip;
367 int align_jumps_max_skip;
368 int align_labels_log;
369 int align_labels_max_skip;
370 int align_functions_log;
372 /* Like align_functions_log above, but used by front-ends to force the
373 minimum function alignment. Zero means no alignment is forced. */
374 int force_align_functions_log;
378 const char *const string;
382 lang_independent_options;
384 /* Nonzero if subexpressions must be evaluated from left-to-right. */
385 int flag_evaluation_order = 0;
387 /* The user symbol prefix after having resolved same. */
388 const char *user_label_prefix;
390 static const param_info lang_independent_params[] = {
391 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
392 { OPTION, DEFAULT, MIN, MAX, HELP },
393 #include "params.def"
395 { NULL, 0, 0, 0, NULL }
398 /* Output files for assembler code (real compiler output)
399 and debugging dumps. */
403 FILE *dump_file = NULL;
404 const char *dump_file_name;
406 /* The current working directory of a translation. It's generally the
407 directory from which compilation was initiated, but a preprocessed
408 file may specify the original directory in which it was
411 static const char *src_pwd;
413 /* Initialize src_pwd with the given string, and return true. If it
414 was already initialized, return false. As a special case, it may
415 be called with a NULL argument to test whether src_pwd has NOT been
419 set_src_pwd (const char *pwd)
423 if (strcmp (src_pwd, pwd) == 0)
429 src_pwd = xstrdup (pwd);
433 /* Return the directory from which the translation unit was initiated,
434 in case set_src_pwd() was not called before to assign it a
450 /* Called when the start of a function definition is parsed,
451 this function prints on stderr the name of the function. */
453 announce_function (tree decl)
457 if (rtl_dump_and_exit)
458 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
460 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
462 pp_needs_newline (global_dc->printer) = true;
463 diagnostic_set_last_function (global_dc);
467 /* Set up a default flag_random_seed and local_tick, unless the user
468 already specified one. */
473 if (!flag_random_seed)
475 unsigned HOST_WIDE_INT value;
476 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
478 /* Get some more or less random data. */
479 #ifdef HAVE_GETTIMEOFDAY
483 gettimeofday (&tv, NULL);
484 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
488 time_t now = time (NULL);
490 if (now != (time_t)-1)
491 local_tick = (unsigned) now;
494 value = local_tick ^ getpid ();
496 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
497 flag_random_seed = random_seed;
499 else if (!local_tick)
504 /* Decode the string P as an integral parameter.
505 If the string is indeed an integer return its numeric value else
506 issue an Invalid Option error for the option PNAME and return DEFVAL.
507 If PNAME is zero just return DEFVAL, do not call error. */
510 read_integral_parameter (const char *p, const char *pname, const int defval)
512 const char *endp = p;
525 error ("invalid option argument %qs", pname);
532 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
533 for floor_log2 and exact_log2; see toplev.h. That construct, however,
534 conflicts with the ISO C++ One Definition Rule. */
536 #if GCC_VERSION < 3004 || !defined (__cplusplus)
538 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
539 If X is 0, return -1. */
542 floor_log2 (unsigned HOST_WIDE_INT x)
550 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
552 if (HOST_BITS_PER_WIDE_INT > 64)
553 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
555 if (HOST_BITS_PER_WIDE_INT > 32)
556 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
558 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
560 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
562 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
564 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
566 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
573 /* Return the logarithm of X, base 2, considering X unsigned,
574 if X is a power of 2. Otherwise, returns -1. */
577 exact_log2 (unsigned HOST_WIDE_INT x)
582 return x ? CTZ_HWI (x) : -1;
584 return floor_log2 (x);
588 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
590 /* Handler for fatal signals, such as SIGSEGV. These are transformed
591 into ICE messages, which is much more user friendly. In case the
592 error printer crashes, reset the signal to prevent infinite recursion. */
595 crash_signal (int signo)
597 signal (signo, SIG_DFL);
599 /* If we crashed while processing an ASM statement, then be a little more
600 graceful. It's most likely the user's fault. */
601 if (this_is_asm_operands)
603 output_operand_lossage ("unrecoverable error");
604 exit (FATAL_EXIT_CODE);
607 internal_error ("%s", strsignal (signo));
610 /* Arrange to dump core on error. (The regular error message is still
611 printed first, except in the case of abort().) */
614 setup_core_dumping (void)
617 signal (SIGABRT, SIG_DFL);
619 #if defined(HAVE_SETRLIMIT)
622 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
623 fatal_error ("getting core file size maximum limit: %m");
624 rlim.rlim_cur = rlim.rlim_max;
625 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
626 fatal_error ("setting core file size limit to maximum: %m");
629 diagnostic_abort_on_error (global_dc);
633 /* Strip off a legitimate source ending from the input string NAME of
634 length LEN. Rather than having to know the names used by all of
635 our front ends, we strip off an ending of a period followed by
636 up to five characters. (Java uses ".class".) */
639 strip_off_ending (char *name, int len)
642 for (i = 2; i < 6 && len > i; i++)
644 if (name[len - i] == '.')
646 name[len - i] = '\0';
652 /* Output a quoted string. */
655 output_quoted_string (FILE *asm_file, const char *string)
657 #ifdef OUTPUT_QUOTED_STRING
658 OUTPUT_QUOTED_STRING (asm_file, string);
662 putc ('\"', asm_file);
663 while ((c = *string++) != 0)
667 if (c == '\"' || c == '\\')
668 putc ('\\', asm_file);
672 fprintf (asm_file, "\\%03o", (unsigned char) c);
674 putc ('\"', asm_file);
678 /* Output a file name in the form wanted by System V. */
681 output_file_directive (FILE *asm_file, const char *input_name)
686 if (input_name == NULL)
687 input_name = "<stdin>";
689 len = strlen (input_name);
690 na = input_name + len;
692 /* NA gets INPUT_NAME sans directory names. */
693 while (na > input_name)
695 if (IS_DIR_SEPARATOR (na[-1]))
700 #ifdef ASM_OUTPUT_SOURCE_FILENAME
701 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
703 fprintf (asm_file, "\t.file\t");
704 output_quoted_string (asm_file, na);
705 fputc ('\n', asm_file);
709 /* A subroutine of wrapup_global_declarations. We've come to the end of
710 the compilation unit. All deferred variables should be undeferred,
711 and all incomplete decls should be finalized. */
714 wrapup_global_declaration_1 (tree decl)
716 /* We're not deferring this any longer. Assignment is conditional to
717 avoid needlessly dirtying PCH pages. */
718 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
719 && DECL_DEFER_OUTPUT (decl) != 0)
720 DECL_DEFER_OUTPUT (decl) = 0;
722 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
723 lang_hooks.finish_incomplete_decl (decl);
726 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
727 needs to be output. Return true if it is output. */
730 wrapup_global_declaration_2 (tree decl)
732 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
735 /* Don't write out static consts, unless we still need them.
737 We also keep static consts if not optimizing (for debugging),
738 unless the user specified -fno-keep-static-consts.
739 ??? They might be better written into the debug information.
740 This is possible when using DWARF.
742 A language processor that wants static constants to be always
743 written out (even if it is not used) is responsible for
744 calling rest_of_decl_compilation itself. E.g. the C front-end
745 calls rest_of_decl_compilation from finish_decl.
746 One motivation for this is that is conventional in some
747 environments to write things like:
748 static const char rcsid[] = "... version string ...";
749 intending to force the string to be in the executable.
751 A language processor that would prefer to have unneeded
752 static constants "optimized away" would just defer writing
753 them out until here. E.g. C++ does this, because static
754 constants are often defined in header files.
756 ??? A tempting alternative (for both C and C++) would be
757 to force a constant to be written if and only if it is
758 defined in a main file, as opposed to an include file. */
760 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
762 struct cgraph_varpool_node *node;
764 node = cgraph_varpool_node (decl);
768 else if (node->alias)
770 else if (!cgraph_global_info_ready
772 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
774 else if (node->needed)
776 else if (DECL_COMDAT (decl))
778 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
779 && (optimize || !flag_keep_static_consts
780 || DECL_ARTIFICIAL (decl)))
785 rest_of_decl_compilation (decl, 1, 1);
793 /* Do any final processing required for the declarations in VEC, of
794 which there are LEN. We write out inline functions and variables
795 that have been deferred until this point, but which are required.
796 Returns nonzero if anything was put out. */
799 wrapup_global_declarations (tree *vec, int len)
801 bool reconsider, output_something = false;
804 for (i = 0; i < len; i++)
805 wrapup_global_declaration_1 (vec[i]);
807 /* Now emit any global variables or functions that we have been
808 putting off. We need to loop in case one of the things emitted
809 here references another one which comes earlier in the list. */
813 for (i = 0; i < len; i++)
814 reconsider |= wrapup_global_declaration_2 (vec[i]);
816 output_something = true;
820 return output_something;
823 /* A subroutine of check_global_declarations. Issue appropriate warnings
824 for the global declaration DECL. */
827 check_global_declaration_1 (tree decl)
829 /* Warn about any function declared static but not defined. We don't
830 warn about variables, because many programs have static variables
831 that exist only to get some text into the object file. */
832 if (TREE_CODE (decl) == FUNCTION_DECL
833 && DECL_INITIAL (decl) == 0
834 && DECL_EXTERNAL (decl)
835 && ! DECL_ARTIFICIAL (decl)
836 && ! TREE_NO_WARNING (decl)
837 && ! TREE_PUBLIC (decl)
838 && (warn_unused_function
839 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
841 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
842 pedwarn ("%q+F used but never defined", decl);
844 warning (0, "%q+F declared %<static%> but never defined", decl);
845 /* This symbol is effectively an "extern" declaration now. */
846 TREE_PUBLIC (decl) = 1;
847 assemble_external (decl);
850 /* Warn about static fns or vars defined but not used. */
851 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
852 /* We don't warn about "static const" variables because the
853 "rcs_id" idiom uses that construction. */
854 || (warn_unused_variable
855 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
856 && ! DECL_IN_SYSTEM_HEADER (decl)
857 && ! TREE_USED (decl)
858 /* The TREE_USED bit for file-scope decls is kept in the identifier,
859 to handle multiple external decls in different scopes. */
860 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
861 && ! DECL_EXTERNAL (decl)
862 && ! TREE_PUBLIC (decl)
863 /* A volatile variable might be used in some non-obvious way. */
864 && ! TREE_THIS_VOLATILE (decl)
865 /* Global register variables must be declared to reserve them. */
866 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
867 /* Otherwise, ask the language. */
868 && lang_hooks.decls.warn_unused_global (decl))
869 warning (0, "%q+D defined but not used", decl);
872 /* Issue appropriate warnings for the global declarations in VEC (of
873 which there are LEN). */
876 check_global_declarations (tree *vec, int len)
880 for (i = 0; i < len; i++)
881 check_global_declaration_1 (vec[i]);
884 /* Emit debugging information for all global declarations in VEC. */
887 emit_debug_global_declarations (tree *vec, int len)
891 /* Avoid confusing the debug information machinery when there are errors. */
892 if (errorcount != 0 || sorrycount != 0)
895 timevar_push (TV_SYMOUT);
896 for (i = 0; i < len; i++)
897 debug_hooks->global_decl (vec[i]);
898 timevar_pop (TV_SYMOUT);
901 /* Warn about a use of an identifier which was marked deprecated. */
903 warn_deprecated_use (tree node)
905 if (node == 0 || !warn_deprecated_decl)
910 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
911 warning (OPT_Wdeprecated_declarations,
912 "%qs is deprecated (declared at %s:%d)",
913 IDENTIFIER_POINTER (DECL_NAME (node)),
914 xloc.file, xloc.line);
916 else if (TYPE_P (node))
918 const char *what = NULL;
919 tree decl = TYPE_STUB_DECL (node);
921 if (TYPE_NAME (node))
923 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
924 what = IDENTIFIER_POINTER (TYPE_NAME (node));
925 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
926 && DECL_NAME (TYPE_NAME (node)))
927 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
932 expanded_location xloc
933 = expand_location (DECL_SOURCE_LOCATION (decl));
935 warning (OPT_Wdeprecated_declarations,
936 "%qs is deprecated (declared at %s:%d)", what,
937 xloc.file, xloc.line);
939 warning (OPT_Wdeprecated_declarations,
940 "type is deprecated (declared at %s:%d)",
941 xloc.file, xloc.line);
946 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
948 warning (OPT_Wdeprecated_declarations, "type is deprecated");
953 /* Save the current INPUT_LOCATION on the top entry in the
954 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
955 INPUT_LOCATION accordingly. */
958 #ifdef USE_MAPPED_LOCATION
959 push_srcloc (location_t fline)
961 push_srcloc (const char *file, int line)
964 struct file_stack *fs;
966 gcc_assert (!input_file_stack_restored);
967 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
968 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
970 fs = XNEW (struct file_stack);
971 fs->location = input_location;
972 fs->next = input_file_stack;
973 #ifdef USE_MAPPED_LOCATION
974 input_location = fline;
976 input_filename = file;
979 input_file_stack = fs;
980 input_file_stack_tick++;
981 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
984 /* Pop the top entry off the stack of presently open source files.
985 Restore the INPUT_LOCATION from the new topmost entry on the
991 struct file_stack *fs;
993 gcc_assert (!input_file_stack_restored);
994 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
995 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
997 fs = input_file_stack;
998 input_location = fs->location;
999 input_file_stack = fs->next;
1000 input_file_stack_tick++;
1001 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1004 /* Restore the input file stack to its state as of TICK, for the sake
1005 of diagnostics after processing the whole input. Once this has
1006 been called, push_srcloc and pop_srcloc may no longer be
1009 restore_input_file_stack (int tick)
1012 input_file_stack = NULL;
1014 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1015 input_file_stack_tick = tick;
1016 input_file_stack_restored = true;
1019 /* Compile an entire translation unit. Write a file of assembly
1020 output and various debugging dumps. */
1025 /* Initialize yet another pass. */
1028 init_final (main_input_filename);
1029 coverage_init (aux_base_name);
1031 timevar_push (TV_PARSE);
1033 /* Call the parser, which parses the entire file (calling
1034 rest_of_compilation for each function). */
1035 lang_hooks.parse_file (set_yydebug);
1037 /* In case there were missing block closers,
1038 get us back to the global binding level. */
1039 lang_hooks.clear_binding_stack ();
1041 /* Compilation is now finished except for writing
1042 what's left of the symbol table output. */
1043 timevar_pop (TV_PARSE);
1045 if (flag_syntax_only || errorcount || sorrycount)
1048 lang_hooks.decls.final_write_globals ();
1049 cgraph_varpool_assemble_pending_decls ();
1050 finish_aliases_2 ();
1052 /* This must occur after the loop to output deferred functions.
1053 Else the coverage initializer would not be emitted if all the
1054 functions in this compilation unit were deferred. */
1057 /* Likewise for mudflap static object registrations. */
1059 mudflap_finish_file ();
1061 output_shared_constant_pool ();
1062 output_object_blocks ();
1064 /* Write out any pending weak symbol declarations. */
1068 /* Do dbx symbols. */
1069 timevar_push (TV_SYMOUT);
1071 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1072 if (dwarf2out_do_frame ())
1073 dwarf2out_frame_finish ();
1076 (*debug_hooks->finish) (main_input_filename);
1077 timevar_pop (TV_SYMOUT);
1079 /* Output some stuff at end of file if nec. */
1081 dw2_output_indirect_constants ();
1083 /* Flush any pending external directives. cgraph did this for
1084 assemble_external calls from the front end, but the RTL
1085 expander can also generate them. */
1086 process_pending_assemble_externals ();
1088 /* Attach a special .ident directive to the end of the file to identify
1089 the version of GCC which compiled this code. The format of the .ident
1090 string is patterned after the ones produced by native SVR4 compilers. */
1093 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1094 IDENT_ASM_OP, version_string);
1097 /* This must be at the end. Some target ports emit end of file directives
1098 into the assembly file here, and hence we can not output anything to the
1099 assembly file after this point. */
1100 targetm.asm_out.file_end ();
1103 /* Parse a -d... command line switch. */
1106 decode_d_option (const char *arg)
1117 flag_print_asm_name = 1;
1120 flag_dump_rtl_in_asm = 1;
1121 flag_print_asm_name = 1;
1124 graph_dump_format = vcg;
1127 rtl_dump_and_exit = 1;
1132 case 'D': /* These are handled by the preprocessor. */
1136 setup_core_dumping();
1141 if (!enable_rtl_dump_file (c))
1142 warning (0, "unrecognized gcc debugging option: %c", c);
1147 /* Indexed by enum debug_info_type. */
1148 const char *const debug_type_names[] =
1150 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1153 /* Print version information to FILE.
1154 Each line begins with INDENT (for the case where FILE is the
1155 assembler output file). */
1158 print_version (FILE *file, const char *indent)
1160 static const char fmt1[] =
1162 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1164 N_("%s%s%s version %s (%s) compiled by CC.\n")
1167 static const char fmt2[] =
1168 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1170 #define __VERSION__ "[?]"
1173 file == stderr ? _(fmt1) : fmt1,
1174 indent, *indent != 0 ? " " : "",
1175 lang_hooks.name, version_string, TARGET_NAME,
1176 indent, __VERSION__);
1178 file == stderr ? _(fmt2) : fmt2,
1179 indent, *indent != 0 ? " " : "",
1180 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1183 /* Print an option value and return the adjusted position in the line.
1184 ??? We don't handle error returns from fprintf (disk full); presumably
1185 other code will catch a disk full though. */
1188 print_single_switch (FILE *file, int pos, int max,
1189 const char *indent, const char *sep, const char *term,
1190 const char *type, const char *name)
1192 /* The ultrix fprintf returns 0 on success, so compute the result we want
1193 here since we need it for the following test. */
1194 int len = strlen (sep) + strlen (type) + strlen (name);
1199 fprintf (file, "%s", term);
1204 fprintf (file, "%s", indent);
1205 pos = strlen (indent);
1207 fprintf (file, "%s%s%s", sep, type, name);
1212 /* Print active target switches to FILE.
1213 POS is the current cursor position and MAX is the size of a "line".
1214 Each line begins with INDENT and ends with TERM.
1215 Each switch is separated from the next by SEP. */
1218 print_switch_values (FILE *file, int pos, int max,
1219 const char *indent, const char *sep, const char *term)
1224 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1225 that it can be printed below. This helps reproducibility. */
1228 /* Print the options as passed. */
1229 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1230 _("options passed: "), "");
1232 for (p = &save_argv[1]; *p != NULL; p++)
1236 if (strcmp (*p, "-o") == 0)
1242 if (strcmp (*p, "-quiet") == 0)
1244 if (strcmp (*p, "-version") == 0)
1249 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1252 fprintf (file, "%s", term);
1254 /* Print the -f and -m options that have been enabled.
1255 We don't handle language specific options but printing argv
1258 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1259 _("options enabled: "), "");
1261 for (j = 0; j < cl_options_count; j++)
1262 if ((cl_options[j].flags & CL_REPORT)
1263 && option_enabled (j) > 0)
1264 pos = print_single_switch (file, pos, max, indent, sep, term,
1265 "", cl_options[j].opt_text);
1267 fprintf (file, "%s", term);
1270 /* Open assembly code output file. Do this even if -fsyntax-only is
1271 on, because then the driver will have provided the name of a
1272 temporary file or bit bucket for us. NAME is the file specified on
1273 the command line, possibly NULL. */
1275 init_asm_output (const char *name)
1277 if (name == NULL && asm_file_name == 0)
1278 asm_out_file = stdout;
1281 if (asm_file_name == 0)
1283 int len = strlen (dump_base_name);
1284 char *dumpname = XNEWVEC (char, len + 6);
1285 memcpy (dumpname, dump_base_name, len + 1);
1286 strip_off_ending (dumpname, len);
1287 strcat (dumpname, ".s");
1288 asm_file_name = dumpname;
1290 if (!strcmp (asm_file_name, "-"))
1291 asm_out_file = stdout;
1293 asm_out_file = fopen (asm_file_name, "w+b");
1294 if (asm_out_file == 0)
1295 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1298 if (!flag_syntax_only)
1300 targetm.asm_out.file_start ();
1302 #ifdef ASM_COMMENT_START
1303 if (flag_verbose_asm)
1305 /* Print the list of options in effect. */
1306 print_version (asm_out_file, ASM_COMMENT_START);
1307 print_switch_values (asm_out_file, 0, MAX_LINE,
1308 ASM_COMMENT_START, " ", "\n");
1309 /* Add a blank line here so it appears in assembler output but not
1311 fprintf (asm_out_file, "\n");
1317 /* Return true if the state of option OPTION should be stored in PCH files
1318 and checked by default_pch_valid_p. Store the option's current state
1322 option_affects_pch_p (int option, struct cl_option_state *state)
1324 if ((cl_options[option].flags & CL_TARGET) == 0)
1326 if (cl_options[option].flag_var == &target_flags)
1327 if (targetm.check_pch_target_flags)
1329 return get_option_state (option, state);
1332 /* Default version of get_pch_validity.
1333 By default, every flag difference is fatal; that will be mostly right for
1334 most targets, but completely right for very few. */
1337 default_get_pch_validity (size_t *len)
1339 struct cl_option_state state;
1344 if (targetm.check_pch_target_flags)
1345 *len += sizeof (target_flags);
1346 for (i = 0; i < cl_options_count; i++)
1347 if (option_affects_pch_p (i, &state))
1350 result = r = XNEWVEC (char, *len);
1354 if (targetm.check_pch_target_flags)
1356 memcpy (r, &target_flags, sizeof (target_flags));
1357 r += sizeof (target_flags);
1360 for (i = 0; i < cl_options_count; i++)
1361 if (option_affects_pch_p (i, &state))
1363 memcpy (r, state.data, state.size);
1370 /* Return a message which says that a PCH file was created with a different
1371 setting of OPTION. */
1374 pch_option_mismatch (const char *option)
1378 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1380 return _("out of memory");
1384 /* Default version of pch_valid_p. */
1387 default_pch_valid_p (const void *data_p, size_t len)
1389 struct cl_option_state state;
1390 const char *data = (const char *)data_p;
1393 /* -fpic and -fpie also usually make a PCH invalid. */
1394 if (data[0] != flag_pic)
1395 return _("created and used with different settings of -fpic");
1396 if (data[1] != flag_pie)
1397 return _("created and used with different settings of -fpie");
1400 /* Check target_flags. */
1401 if (targetm.check_pch_target_flags)
1406 memcpy (&tf, data, sizeof (target_flags));
1407 data += sizeof (target_flags);
1408 len -= sizeof (target_flags);
1409 r = targetm.check_pch_target_flags (tf);
1414 for (i = 0; i < cl_options_count; i++)
1415 if (option_affects_pch_p (i, &state))
1417 if (memcmp (data, state.data, state.size) != 0)
1418 return pch_option_mismatch (cl_options[i].opt_text);
1426 /* Default tree printer. Handles declarations only. */
1428 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1429 int precision, bool wide, bool set_locus, bool hash)
1433 /* FUTURE: %+x should set the locus. */
1434 if (precision != 0 || wide || hash)
1440 t = va_arg (*text->args_ptr, tree);
1441 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1442 t = DECL_DEBUG_EXPR (t);
1447 t = va_arg (*text->args_ptr, tree);
1454 if (set_locus && text->locus)
1455 *text->locus = DECL_SOURCE_LOCATION (t);
1459 const char *n = DECL_NAME (t)
1460 ? lang_hooks.decl_printable_name (t, 2)
1465 dump_generic_node (pp, t, 0, 0, 0);
1470 /* Initialization of the front end environment, before command line
1471 options are parsed. Signal handlers, internationalization etc.
1472 ARGV0 is main's argv[0]. */
1474 general_init (const char *argv0)
1478 p = argv0 + strlen (argv0);
1479 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1483 xmalloc_set_program_name (progname);
1487 /* Unlock the stdio streams. */
1488 unlock_std_streams ();
1490 gcc_init_libintl ();
1492 /* Initialize the diagnostics reporting machinery, so option parsing
1493 can give warnings and errors. */
1494 diagnostic_initialize (global_dc);
1495 /* Set a default printer. Language specific initializations will
1496 override it later. */
1497 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1499 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1501 signal (SIGSEGV, crash_signal);
1504 signal (SIGILL, crash_signal);
1507 signal (SIGBUS, crash_signal);
1510 signal (SIGABRT, crash_signal);
1512 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1513 signal (SIGIOT, crash_signal);
1516 signal (SIGFPE, crash_signal);
1519 /* Other host-specific signal setup. */
1520 (*host_hooks.extra_signals)();
1522 /* Initialize the garbage-collector, string pools and tree type hash
1526 linemap_init (&line_table);
1529 /* Initialize register usage now so switches may override. */
1532 /* Register the language-independent parameters. */
1533 add_params (lang_independent_params, LAST_PARAM);
1535 /* This must be done after add_params but before argument processing. */
1536 init_ggc_heuristics();
1537 init_optimization_passes ();
1540 /* Return true if the current target supports -fsection-anchors. */
1543 target_supports_section_anchors_p (void)
1545 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1548 if (targetm.asm_out.output_anchor == NULL)
1554 /* Process the options that have been parsed. */
1556 process_options (void)
1558 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1559 This can happen with incorrect pre-processed input. */
1560 debug_hooks = &do_nothing_debug_hooks;
1562 /* Allow the front end to perform consistency checks and do further
1563 initialization based on the command line options. This hook also
1564 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1565 so we can correctly initialize debug output. */
1566 no_backend = lang_hooks.post_options (&main_input_filename);
1567 #ifndef USE_MAPPED_LOCATION
1568 input_filename = main_input_filename;
1571 #ifdef OVERRIDE_OPTIONS
1572 /* Some machines may reject certain combinations of options. */
1576 if (flag_section_anchors && !target_supports_section_anchors_p ())
1578 warning (OPT_fsection_anchors,
1579 "this target does not support %qs", "-fsection-anchors");
1580 flag_section_anchors = 0;
1583 if (flag_short_enums == 2)
1584 flag_short_enums = targetm.default_short_enums ();
1586 /* Set aux_base_name if not already set. */
1589 else if (main_input_filename)
1591 char *name = xstrdup (lbasename (main_input_filename));
1593 strip_off_ending (name, strlen (name));
1594 aux_base_name = name;
1597 aux_base_name = "gccaux";
1599 /* Set up the align_*_log variables, defaulting them to 1 if they
1600 were still unset. */
1601 if (align_loops <= 0) align_loops = 1;
1602 if (align_loops_max_skip > align_loops || !align_loops)
1603 align_loops_max_skip = align_loops - 1;
1604 align_loops_log = floor_log2 (align_loops * 2 - 1);
1605 if (align_jumps <= 0) align_jumps = 1;
1606 if (align_jumps_max_skip > align_jumps || !align_jumps)
1607 align_jumps_max_skip = align_jumps - 1;
1608 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1609 if (align_labels <= 0) align_labels = 1;
1610 align_labels_log = floor_log2 (align_labels * 2 - 1);
1611 if (align_labels_max_skip > align_labels || !align_labels)
1612 align_labels_max_skip = align_labels - 1;
1613 if (align_functions <= 0) align_functions = 1;
1614 align_functions_log = floor_log2 (align_functions * 2 - 1);
1616 /* Unrolling all loops implies that standard loop unrolling must also
1618 if (flag_unroll_all_loops)
1619 flag_unroll_loops = 1;
1621 /* The loop unrolling code assumes that cse will be run after loop.
1622 web and rename-registers also help when run after loop unrolling. */
1624 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1625 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1626 if (flag_web == AUTODETECT_VALUE)
1627 flag_web = flag_unroll_loops || flag_peel_loops;
1628 if (flag_rename_registers == AUTODETECT_VALUE)
1629 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1631 if (flag_non_call_exceptions)
1632 flag_asynchronous_unwind_tables = 1;
1633 if (flag_asynchronous_unwind_tables)
1634 flag_unwind_tables = 1;
1636 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1638 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1639 flag_unit_at_a_time = 0;
1641 if (!flag_unit_at_a_time)
1642 flag_section_anchors = 0;
1644 if (flag_value_profile_transformations)
1645 flag_profile_values = 1;
1647 /* Warn about options that are not supported on this machine. */
1648 #ifndef INSN_SCHEDULING
1649 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1650 warning (0, "instruction scheduling not supported on this target machine");
1653 if (flag_delayed_branch)
1654 warning (0, "this target machine does not have delayed branches");
1657 user_label_prefix = USER_LABEL_PREFIX;
1658 if (flag_leading_underscore != -1)
1660 /* If the default prefix is more complicated than "" or "_",
1661 issue a warning and ignore this option. */
1662 if (user_label_prefix[0] == 0 ||
1663 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1665 user_label_prefix = flag_leading_underscore ? "_" : "";
1668 warning (0, "-f%sleading-underscore not supported on this target machine",
1669 flag_leading_underscore ? "" : "no-");
1672 /* If we are in verbose mode, write out the version and maybe all the
1673 option flags in use. */
1676 print_version (stderr, "");
1678 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
1681 if (flag_syntax_only)
1683 write_symbols = NO_DEBUG;
1687 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1689 if (debug_info_level == DINFO_LEVEL_NONE)
1690 write_symbols = NO_DEBUG;
1692 /* Now we know write_symbols, set up the debug hooks based on it.
1693 By default we do nothing for debug output. */
1694 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1695 default_debug_hooks = &do_nothing_debug_hooks;
1696 #if defined(DBX_DEBUGGING_INFO)
1697 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1698 default_debug_hooks = &dbx_debug_hooks;
1700 #if defined(XCOFF_DEBUGGING_INFO)
1701 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1702 default_debug_hooks = &xcoff_debug_hooks;
1704 #ifdef SDB_DEBUGGING_INFO
1705 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1706 default_debug_hooks = &sdb_debug_hooks;
1708 #ifdef DWARF2_DEBUGGING_INFO
1709 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1710 default_debug_hooks = &dwarf2_debug_hooks;
1712 #ifdef VMS_DEBUGGING_INFO
1713 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1714 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1715 default_debug_hooks = &vmsdbg_debug_hooks;
1718 if (write_symbols == NO_DEBUG)
1720 #if defined(DBX_DEBUGGING_INFO)
1721 else if (write_symbols == DBX_DEBUG)
1722 debug_hooks = &dbx_debug_hooks;
1724 #if defined(XCOFF_DEBUGGING_INFO)
1725 else if (write_symbols == XCOFF_DEBUG)
1726 debug_hooks = &xcoff_debug_hooks;
1728 #ifdef SDB_DEBUGGING_INFO
1729 else if (write_symbols == SDB_DEBUG)
1730 debug_hooks = &sdb_debug_hooks;
1732 #ifdef DWARF2_DEBUGGING_INFO
1733 else if (write_symbols == DWARF2_DEBUG)
1734 debug_hooks = &dwarf2_debug_hooks;
1736 #ifdef VMS_DEBUGGING_INFO
1737 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1738 debug_hooks = &vmsdbg_debug_hooks;
1741 error ("target system does not support the \"%s\" debug format",
1742 debug_type_names[write_symbols]);
1744 /* Now we know which debug output will be used so we can set
1745 flag_var_tracking, flag_rename_registers if the user has
1746 not specified them. */
1747 if (debug_info_level < DINFO_LEVEL_NORMAL
1748 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1750 if (flag_var_tracking == 1)
1752 if (debug_info_level < DINFO_LEVEL_NORMAL)
1753 warning (0, "variable tracking requested, but useless unless "
1754 "producing debug info");
1756 warning (0, "variable tracking requested, but not supported "
1757 "by this debug format");
1759 flag_var_tracking = 0;
1762 if (flag_rename_registers == AUTODETECT_VALUE)
1763 flag_rename_registers = default_debug_hooks->var_location
1764 != do_nothing_debug_hooks.var_location;
1766 if (flag_var_tracking == AUTODETECT_VALUE)
1767 flag_var_tracking = optimize >= 1;
1769 /* If auxiliary info generation is desired, open the output file.
1770 This goes in the same directory as the source file--unlike
1771 all the other output files. */
1772 if (flag_gen_aux_info)
1774 aux_info_file = fopen (aux_info_file_name, "w");
1775 if (aux_info_file == 0)
1776 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1779 if (! targetm.have_named_sections)
1781 if (flag_function_sections)
1783 warning (0, "-ffunction-sections not supported for this target");
1784 flag_function_sections = 0;
1786 if (flag_data_sections)
1788 warning (0, "-fdata-sections not supported for this target");
1789 flag_data_sections = 0;
1793 if (flag_function_sections && profile_flag)
1795 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1796 flag_function_sections = 0;
1799 #ifndef HAVE_prefetch
1800 if (flag_prefetch_loop_arrays)
1802 warning (0, "-fprefetch-loop-arrays not supported for this target");
1803 flag_prefetch_loop_arrays = 0;
1806 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1808 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1809 flag_prefetch_loop_arrays = 0;
1813 /* This combination of options isn't handled for i386 targets and doesn't
1814 make much sense anyway, so don't allow it. */
1815 if (flag_prefetch_loop_arrays && optimize_size)
1817 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1818 flag_prefetch_loop_arrays = 0;
1821 #ifndef OBJECT_FORMAT_ELF
1822 #ifndef OBJECT_FORMAT_MACHO
1823 if (flag_function_sections && write_symbols != NO_DEBUG)
1824 warning (0, "-ffunction-sections may affect debugging on some targets");
1828 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1829 if (flag_signaling_nans)
1830 flag_trapping_math = 1;
1832 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1833 if (flag_cx_limited_range)
1834 flag_complex_method = 0;
1836 /* Targets must be able to place spill slots at lower addresses. If the
1837 target already uses a soft frame pointer, the transition is trivial. */
1838 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1840 warning (0, "-fstack-protector not supported for this target");
1841 flag_stack_protect = 0;
1843 if (!flag_stack_protect)
1844 warn_stack_protect = 0;
1846 /* ??? Unwind info is not correct around the CFG unless either a frame
1847 pointer is present or A_O_A is set. Fixing this requires rewriting
1848 unwind info generation to be aware of the CFG and propagating states
1850 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1851 && flag_omit_frame_pointer)
1853 warning (0, "unwind tables currently requires a frame pointer "
1855 flag_omit_frame_pointer = 0;
1859 /* Initialize the compiler back end. */
1863 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1864 || debug_info_level == DINFO_LEVEL_VERBOSE
1865 #ifdef VMS_DEBUGGING_INFO
1866 /* Enable line number info for traceback. */
1867 || debug_info_level > DINFO_LEVEL_NONE
1869 || flag_test_coverage);
1873 init_fake_stack_mems ();
1876 init_varasm_once ();
1878 /* The following initialization functions need to generate rtl, so
1879 provide a dummy function context for them. */
1880 init_dummy_function_start ();
1882 if (flag_caller_saves)
1883 init_caller_save ();
1884 expand_dummy_function_end ();
1887 /* Language-dependent initialization. Returns nonzero on success. */
1889 lang_dependent_init (const char *name)
1891 location_t save_loc = input_location;
1892 if (dump_base_name == 0)
1893 dump_base_name = name && name[0] ? name : "gccdump";
1895 /* Other front-end initialization. */
1896 #ifdef USE_MAPPED_LOCATION
1897 input_location = BUILTINS_LOCATION;
1899 input_filename = "<built-in>";
1902 if (lang_hooks.init () == 0)
1904 input_location = save_loc;
1906 init_asm_output (name);
1908 /* These create various _DECL nodes, so need to be called after the
1909 front end is initialized. */
1913 /* The following initialization functions need to generate rtl, so
1914 provide a dummy function context for them. */
1915 init_dummy_function_start ();
1917 expand_dummy_function_end ();
1919 /* If dbx symbol table desired, initialize writing it and output the
1920 predefined types. */
1921 timevar_push (TV_SYMOUT);
1923 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1924 if (dwarf2out_do_frame ())
1925 dwarf2out_frame_init ();
1928 /* Now we have the correct original filename, we can initialize
1930 (*debug_hooks->init) (name);
1932 timevar_pop (TV_SYMOUT);
1937 /* Clean up: close opened files, etc. */
1942 /* Close the dump files. */
1943 if (flag_gen_aux_info)
1945 fclose (aux_info_file);
1947 unlink (aux_info_file_name);
1950 /* Close non-debugging input and output files. Take special care to note
1951 whether fclose returns an error, since the pages might still be on the
1952 buffer chain while the file is open. */
1956 if (ferror (asm_out_file) != 0)
1957 fatal_error ("error writing to %s: %m", asm_file_name);
1958 if (fclose (asm_out_file) != 0)
1959 fatal_error ("error closing %s: %m", asm_file_name);
1962 finish_optimization_passes ();
1966 ggc_print_statistics ();
1967 stringpool_statistics ();
1968 dump_tree_statistics ();
1969 dump_rtx_statistics ();
1970 dump_varray_statistics ();
1971 dump_alloc_pool_statistics ();
1972 dump_ggc_loc_statistics ();
1975 /* Free up memory for the benefit of leak detectors. */
1978 /* Language-specific end of compilation actions. */
1979 lang_hooks.finish ();
1982 /* Initialize the compiler, and compile the input file. */
1986 /* Initialize timing first. The C front ends read the main file in
1987 the post_options hook, and C++ does file timings. */
1988 if (time_report || !quiet_flag || flag_detailed_statistics)
1990 timevar_start (TV_TOTAL);
1994 /* Don't do any more if an error has already occurred. */
1997 /* This must be run always, because it is needed to compute the FP
1998 predefined macros, such as __LDBL_MAX__, for targets using non
1999 default FP formats. */
2000 init_adjust_machine_modes ();
2002 /* Set up the back-end if requested. */
2006 /* Language-dependent initialization. Returns true on success. */
2007 if (lang_dependent_init (main_input_filename))
2013 /* Stop timing and print the times. */
2014 timevar_stop (TV_TOTAL);
2015 timevar_print (stderr);
2018 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2019 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2020 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2022 It is not safe to call this function more than once. */
2025 toplev_main (unsigned int argc, const char **argv)
2029 /* Initialization of GCC's environment, and diagnostics. */
2030 general_init (argv[0]);
2032 /* Parse the options and do minimal processing; basically just
2033 enough to default flags appropriately. */
2034 decode_options (argc, argv);
2038 /* Exit early if we can (e.g. -help). */
2039 if (!exit_after_options)
2042 if (errorcount || sorrycount)
2043 return (FATAL_EXIT_CODE);
2045 return (SUCCESS_EXIT_CODE);