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. */
1084 process_pending_assemble_externals ();
1086 /* Attach a special .ident directive to the end of the file to identify
1087 the version of GCC which compiled this code. The format of the .ident
1088 string is patterned after the ones produced by native SVR4 compilers. */
1091 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1092 IDENT_ASM_OP, version_string);
1095 /* This must be at the end. Some target ports emit end of file directives
1096 into the assembly file here, and hence we can not output anything to the
1097 assembly file after this point. */
1098 targetm.asm_out.file_end ();
1101 /* Parse a -d... command line switch. */
1104 decode_d_option (const char *arg)
1115 flag_print_asm_name = 1;
1118 flag_dump_rtl_in_asm = 1;
1119 flag_print_asm_name = 1;
1122 graph_dump_format = vcg;
1125 rtl_dump_and_exit = 1;
1130 case 'D': /* These are handled by the preprocessor. */
1134 setup_core_dumping();
1139 if (!enable_rtl_dump_file (c))
1140 warning (0, "unrecognized gcc debugging option: %c", c);
1145 /* Indexed by enum debug_info_type. */
1146 const char *const debug_type_names[] =
1148 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1151 /* Print version information to FILE.
1152 Each line begins with INDENT (for the case where FILE is the
1153 assembler output file). */
1156 print_version (FILE *file, const char *indent)
1158 static const char fmt1[] =
1160 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1162 N_("%s%s%s version %s (%s) compiled by CC.\n")
1165 static const char fmt2[] =
1166 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1168 #define __VERSION__ "[?]"
1171 file == stderr ? _(fmt1) : fmt1,
1172 indent, *indent != 0 ? " " : "",
1173 lang_hooks.name, version_string, TARGET_NAME,
1174 indent, __VERSION__);
1176 file == stderr ? _(fmt2) : fmt2,
1177 indent, *indent != 0 ? " " : "",
1178 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1181 /* Print an option value and return the adjusted position in the line.
1182 ??? We don't handle error returns from fprintf (disk full); presumably
1183 other code will catch a disk full though. */
1186 print_single_switch (FILE *file, int pos, int max,
1187 const char *indent, const char *sep, const char *term,
1188 const char *type, const char *name)
1190 /* The ultrix fprintf returns 0 on success, so compute the result we want
1191 here since we need it for the following test. */
1192 int len = strlen (sep) + strlen (type) + strlen (name);
1197 fprintf (file, "%s", term);
1202 fprintf (file, "%s", indent);
1203 pos = strlen (indent);
1205 fprintf (file, "%s%s%s", sep, type, name);
1210 /* Print active target switches to FILE.
1211 POS is the current cursor position and MAX is the size of a "line".
1212 Each line begins with INDENT and ends with TERM.
1213 Each switch is separated from the next by SEP. */
1216 print_switch_values (FILE *file, int pos, int max,
1217 const char *indent, const char *sep, const char *term)
1222 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1223 that it can be printed below. This helps reproducibility. */
1226 /* Print the options as passed. */
1227 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1228 _("options passed: "), "");
1230 for (p = &save_argv[1]; *p != NULL; p++)
1234 if (strcmp (*p, "-o") == 0)
1240 if (strcmp (*p, "-quiet") == 0)
1242 if (strcmp (*p, "-version") == 0)
1247 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1250 fprintf (file, "%s", term);
1252 /* Print the -f and -m options that have been enabled.
1253 We don't handle language specific options but printing argv
1256 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1257 _("options enabled: "), "");
1259 for (j = 0; j < cl_options_count; j++)
1260 if ((cl_options[j].flags & CL_REPORT)
1261 && option_enabled (j) > 0)
1262 pos = print_single_switch (file, pos, max, indent, sep, term,
1263 "", cl_options[j].opt_text);
1265 fprintf (file, "%s", term);
1268 /* Open assembly code output file. Do this even if -fsyntax-only is
1269 on, because then the driver will have provided the name of a
1270 temporary file or bit bucket for us. NAME is the file specified on
1271 the command line, possibly NULL. */
1273 init_asm_output (const char *name)
1275 if (name == NULL && asm_file_name == 0)
1276 asm_out_file = stdout;
1279 if (asm_file_name == 0)
1281 int len = strlen (dump_base_name);
1282 char *dumpname = XNEWVEC (char, len + 6);
1283 memcpy (dumpname, dump_base_name, len + 1);
1284 strip_off_ending (dumpname, len);
1285 strcat (dumpname, ".s");
1286 asm_file_name = dumpname;
1288 if (!strcmp (asm_file_name, "-"))
1289 asm_out_file = stdout;
1291 asm_out_file = fopen (asm_file_name, "w+b");
1292 if (asm_out_file == 0)
1293 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1296 if (!flag_syntax_only)
1298 targetm.asm_out.file_start ();
1300 #ifdef ASM_COMMENT_START
1301 if (flag_verbose_asm)
1303 /* Print the list of options in effect. */
1304 print_version (asm_out_file, ASM_COMMENT_START);
1305 print_switch_values (asm_out_file, 0, MAX_LINE,
1306 ASM_COMMENT_START, " ", "\n");
1307 /* Add a blank line here so it appears in assembler output but not
1309 fprintf (asm_out_file, "\n");
1315 /* Return true if the state of option OPTION should be stored in PCH files
1316 and checked by default_pch_valid_p. Store the option's current state
1320 option_affects_pch_p (int option, struct cl_option_state *state)
1322 if ((cl_options[option].flags & CL_TARGET) == 0)
1324 if (cl_options[option].flag_var == &target_flags)
1325 if (targetm.check_pch_target_flags)
1327 return get_option_state (option, state);
1330 /* Default version of get_pch_validity.
1331 By default, every flag difference is fatal; that will be mostly right for
1332 most targets, but completely right for very few. */
1335 default_get_pch_validity (size_t *len)
1337 struct cl_option_state state;
1342 if (targetm.check_pch_target_flags)
1343 *len += sizeof (target_flags);
1344 for (i = 0; i < cl_options_count; i++)
1345 if (option_affects_pch_p (i, &state))
1348 result = r = XNEWVEC (char, *len);
1352 if (targetm.check_pch_target_flags)
1354 memcpy (r, &target_flags, sizeof (target_flags));
1355 r += sizeof (target_flags);
1358 for (i = 0; i < cl_options_count; i++)
1359 if (option_affects_pch_p (i, &state))
1361 memcpy (r, state.data, state.size);
1368 /* Return a message which says that a PCH file was created with a different
1369 setting of OPTION. */
1372 pch_option_mismatch (const char *option)
1376 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1378 return _("out of memory");
1382 /* Default version of pch_valid_p. */
1385 default_pch_valid_p (const void *data_p, size_t len)
1387 struct cl_option_state state;
1388 const char *data = (const char *)data_p;
1391 /* -fpic and -fpie also usually make a PCH invalid. */
1392 if (data[0] != flag_pic)
1393 return _("created and used with different settings of -fpic");
1394 if (data[1] != flag_pie)
1395 return _("created and used with different settings of -fpie");
1398 /* Check target_flags. */
1399 if (targetm.check_pch_target_flags)
1404 memcpy (&tf, data, sizeof (target_flags));
1405 data += sizeof (target_flags);
1406 len -= sizeof (target_flags);
1407 r = targetm.check_pch_target_flags (tf);
1412 for (i = 0; i < cl_options_count; i++)
1413 if (option_affects_pch_p (i, &state))
1415 if (memcmp (data, state.data, state.size) != 0)
1416 return pch_option_mismatch (cl_options[i].opt_text);
1424 /* Default tree printer. Handles declarations only. */
1426 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1427 int precision, bool wide, bool set_locus, bool hash)
1431 /* FUTURE: %+x should set the locus. */
1432 if (precision != 0 || wide || hash)
1438 t = va_arg (*text->args_ptr, tree);
1439 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1440 t = DECL_DEBUG_EXPR (t);
1445 t = va_arg (*text->args_ptr, tree);
1452 if (set_locus && text->locus)
1453 *text->locus = DECL_SOURCE_LOCATION (t);
1457 const char *n = DECL_NAME (t)
1458 ? lang_hooks.decl_printable_name (t, 2)
1463 dump_generic_node (pp, t, 0, 0, 0);
1468 /* Initialization of the front end environment, before command line
1469 options are parsed. Signal handlers, internationalization etc.
1470 ARGV0 is main's argv[0]. */
1472 general_init (const char *argv0)
1476 p = argv0 + strlen (argv0);
1477 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1481 xmalloc_set_program_name (progname);
1485 /* Unlock the stdio streams. */
1486 unlock_std_streams ();
1488 gcc_init_libintl ();
1490 /* Initialize the diagnostics reporting machinery, so option parsing
1491 can give warnings and errors. */
1492 diagnostic_initialize (global_dc);
1493 /* Set a default printer. Language specific initializations will
1494 override it later. */
1495 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1497 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1499 signal (SIGSEGV, crash_signal);
1502 signal (SIGILL, crash_signal);
1505 signal (SIGBUS, crash_signal);
1508 signal (SIGABRT, crash_signal);
1510 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1511 signal (SIGIOT, crash_signal);
1514 signal (SIGFPE, crash_signal);
1517 /* Other host-specific signal setup. */
1518 (*host_hooks.extra_signals)();
1520 /* Initialize the garbage-collector, string pools and tree type hash
1524 linemap_init (&line_table);
1527 /* Initialize register usage now so switches may override. */
1530 /* Register the language-independent parameters. */
1531 add_params (lang_independent_params, LAST_PARAM);
1533 /* This must be done after add_params but before argument processing. */
1534 init_ggc_heuristics();
1535 init_optimization_passes ();
1538 /* Return true if the current target supports -fsection-anchors. */
1541 target_supports_section_anchors_p (void)
1543 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1546 if (targetm.asm_out.output_anchor == NULL)
1552 /* Process the options that have been parsed. */
1554 process_options (void)
1556 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1557 This can happen with incorrect pre-processed input. */
1558 debug_hooks = &do_nothing_debug_hooks;
1560 /* Allow the front end to perform consistency checks and do further
1561 initialization based on the command line options. This hook also
1562 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1563 so we can correctly initialize debug output. */
1564 no_backend = lang_hooks.post_options (&main_input_filename);
1565 #ifndef USE_MAPPED_LOCATION
1566 input_filename = main_input_filename;
1569 #ifdef OVERRIDE_OPTIONS
1570 /* Some machines may reject certain combinations of options. */
1574 if (flag_section_anchors && !target_supports_section_anchors_p ())
1576 warning (OPT_fsection_anchors,
1577 "this target does not support %qs", "-fsection-anchors");
1578 flag_section_anchors = 0;
1581 if (flag_short_enums == 2)
1582 flag_short_enums = targetm.default_short_enums ();
1584 /* Set aux_base_name if not already set. */
1587 else if (main_input_filename)
1589 char *name = xstrdup (lbasename (main_input_filename));
1591 strip_off_ending (name, strlen (name));
1592 aux_base_name = name;
1595 aux_base_name = "gccaux";
1597 /* Set up the align_*_log variables, defaulting them to 1 if they
1598 were still unset. */
1599 if (align_loops <= 0) align_loops = 1;
1600 if (align_loops_max_skip > align_loops || !align_loops)
1601 align_loops_max_skip = align_loops - 1;
1602 align_loops_log = floor_log2 (align_loops * 2 - 1);
1603 if (align_jumps <= 0) align_jumps = 1;
1604 if (align_jumps_max_skip > align_jumps || !align_jumps)
1605 align_jumps_max_skip = align_jumps - 1;
1606 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1607 if (align_labels <= 0) align_labels = 1;
1608 align_labels_log = floor_log2 (align_labels * 2 - 1);
1609 if (align_labels_max_skip > align_labels || !align_labels)
1610 align_labels_max_skip = align_labels - 1;
1611 if (align_functions <= 0) align_functions = 1;
1612 align_functions_log = floor_log2 (align_functions * 2 - 1);
1614 /* Unrolling all loops implies that standard loop unrolling must also
1616 if (flag_unroll_all_loops)
1617 flag_unroll_loops = 1;
1619 /* The loop unrolling code assumes that cse will be run after loop.
1620 web and rename-registers also help when run after loop unrolling. */
1622 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1623 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1624 if (flag_web == AUTODETECT_VALUE)
1625 flag_web = flag_unroll_loops || flag_peel_loops;
1626 if (flag_rename_registers == AUTODETECT_VALUE)
1627 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1629 if (flag_non_call_exceptions)
1630 flag_asynchronous_unwind_tables = 1;
1631 if (flag_asynchronous_unwind_tables)
1632 flag_unwind_tables = 1;
1634 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1636 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1637 flag_unit_at_a_time = 0;
1639 if (!flag_unit_at_a_time)
1640 flag_section_anchors = 0;
1642 if (flag_value_profile_transformations)
1643 flag_profile_values = 1;
1645 /* Warn about options that are not supported on this machine. */
1646 #ifndef INSN_SCHEDULING
1647 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1648 warning (0, "instruction scheduling not supported on this target machine");
1651 if (flag_delayed_branch)
1652 warning (0, "this target machine does not have delayed branches");
1655 user_label_prefix = USER_LABEL_PREFIX;
1656 if (flag_leading_underscore != -1)
1658 /* If the default prefix is more complicated than "" or "_",
1659 issue a warning and ignore this option. */
1660 if (user_label_prefix[0] == 0 ||
1661 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1663 user_label_prefix = flag_leading_underscore ? "_" : "";
1666 warning (0, "-f%sleading-underscore not supported on this target machine",
1667 flag_leading_underscore ? "" : "no-");
1670 /* If we are in verbose mode, write out the version and maybe all the
1671 option flags in use. */
1674 print_version (stderr, "");
1676 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
1679 if (flag_syntax_only)
1681 write_symbols = NO_DEBUG;
1685 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1687 if (debug_info_level == DINFO_LEVEL_NONE)
1688 write_symbols = NO_DEBUG;
1690 /* Now we know write_symbols, set up the debug hooks based on it.
1691 By default we do nothing for debug output. */
1692 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1693 default_debug_hooks = &do_nothing_debug_hooks;
1694 #if defined(DBX_DEBUGGING_INFO)
1695 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1696 default_debug_hooks = &dbx_debug_hooks;
1698 #if defined(XCOFF_DEBUGGING_INFO)
1699 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1700 default_debug_hooks = &xcoff_debug_hooks;
1702 #ifdef SDB_DEBUGGING_INFO
1703 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1704 default_debug_hooks = &sdb_debug_hooks;
1706 #ifdef DWARF2_DEBUGGING_INFO
1707 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1708 default_debug_hooks = &dwarf2_debug_hooks;
1710 #ifdef VMS_DEBUGGING_INFO
1711 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1712 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1713 default_debug_hooks = &vmsdbg_debug_hooks;
1716 if (write_symbols == NO_DEBUG)
1718 #if defined(DBX_DEBUGGING_INFO)
1719 else if (write_symbols == DBX_DEBUG)
1720 debug_hooks = &dbx_debug_hooks;
1722 #if defined(XCOFF_DEBUGGING_INFO)
1723 else if (write_symbols == XCOFF_DEBUG)
1724 debug_hooks = &xcoff_debug_hooks;
1726 #ifdef SDB_DEBUGGING_INFO
1727 else if (write_symbols == SDB_DEBUG)
1728 debug_hooks = &sdb_debug_hooks;
1730 #ifdef DWARF2_DEBUGGING_INFO
1731 else if (write_symbols == DWARF2_DEBUG)
1732 debug_hooks = &dwarf2_debug_hooks;
1734 #ifdef VMS_DEBUGGING_INFO
1735 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1736 debug_hooks = &vmsdbg_debug_hooks;
1739 error ("target system does not support the \"%s\" debug format",
1740 debug_type_names[write_symbols]);
1742 /* Now we know which debug output will be used so we can set
1743 flag_var_tracking, flag_rename_registers if the user has
1744 not specified them. */
1745 if (debug_info_level < DINFO_LEVEL_NORMAL
1746 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1748 if (flag_var_tracking == 1)
1750 if (debug_info_level < DINFO_LEVEL_NORMAL)
1751 warning (0, "variable tracking requested, but useless unless "
1752 "producing debug info");
1754 warning (0, "variable tracking requested, but not supported "
1755 "by this debug format");
1757 flag_var_tracking = 0;
1760 if (flag_rename_registers == AUTODETECT_VALUE)
1761 flag_rename_registers = default_debug_hooks->var_location
1762 != do_nothing_debug_hooks.var_location;
1764 if (flag_var_tracking == AUTODETECT_VALUE)
1765 flag_var_tracking = optimize >= 1;
1767 /* If auxiliary info generation is desired, open the output file.
1768 This goes in the same directory as the source file--unlike
1769 all the other output files. */
1770 if (flag_gen_aux_info)
1772 aux_info_file = fopen (aux_info_file_name, "w");
1773 if (aux_info_file == 0)
1774 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1777 if (! targetm.have_named_sections)
1779 if (flag_function_sections)
1781 warning (0, "-ffunction-sections not supported for this target");
1782 flag_function_sections = 0;
1784 if (flag_data_sections)
1786 warning (0, "-fdata-sections not supported for this target");
1787 flag_data_sections = 0;
1791 if (flag_function_sections && profile_flag)
1793 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1794 flag_function_sections = 0;
1797 #ifndef HAVE_prefetch
1798 if (flag_prefetch_loop_arrays)
1800 warning (0, "-fprefetch-loop-arrays not supported for this target");
1801 flag_prefetch_loop_arrays = 0;
1804 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1806 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1807 flag_prefetch_loop_arrays = 0;
1811 /* This combination of options isn't handled for i386 targets and doesn't
1812 make much sense anyway, so don't allow it. */
1813 if (flag_prefetch_loop_arrays && optimize_size)
1815 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1816 flag_prefetch_loop_arrays = 0;
1819 #ifndef OBJECT_FORMAT_ELF
1820 #ifndef OBJECT_FORMAT_MACHO
1821 if (flag_function_sections && write_symbols != NO_DEBUG)
1822 warning (0, "-ffunction-sections may affect debugging on some targets");
1826 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1827 if (flag_signaling_nans)
1828 flag_trapping_math = 1;
1830 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1831 if (flag_cx_limited_range)
1832 flag_complex_method = 0;
1834 /* Targets must be able to place spill slots at lower addresses. If the
1835 target already uses a soft frame pointer, the transition is trivial. */
1836 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1838 warning (0, "-fstack-protector not supported for this target");
1839 flag_stack_protect = 0;
1841 if (!flag_stack_protect)
1842 warn_stack_protect = 0;
1844 /* ??? Unwind info is not correct around the CFG unless either a frame
1845 pointer is present or A_O_A is set. Fixing this requires rewriting
1846 unwind info generation to be aware of the CFG and propagating states
1848 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1849 && flag_omit_frame_pointer)
1851 warning (0, "unwind tables currently requires a frame pointer "
1853 flag_omit_frame_pointer = 0;
1857 /* Initialize the compiler back end. */
1861 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1862 || debug_info_level == DINFO_LEVEL_VERBOSE
1863 #ifdef VMS_DEBUGGING_INFO
1864 /* Enable line number info for traceback. */
1865 || debug_info_level > DINFO_LEVEL_NONE
1867 || flag_test_coverage);
1871 init_fake_stack_mems ();
1874 init_varasm_once ();
1876 /* The following initialization functions need to generate rtl, so
1877 provide a dummy function context for them. */
1878 init_dummy_function_start ();
1880 if (flag_caller_saves)
1881 init_caller_save ();
1882 expand_dummy_function_end ();
1885 /* Language-dependent initialization. Returns nonzero on success. */
1887 lang_dependent_init (const char *name)
1889 location_t save_loc = input_location;
1890 if (dump_base_name == 0)
1891 dump_base_name = name && name[0] ? name : "gccdump";
1893 /* Other front-end initialization. */
1894 #ifdef USE_MAPPED_LOCATION
1895 input_location = BUILTINS_LOCATION;
1897 input_filename = "<built-in>";
1900 if (lang_hooks.init () == 0)
1902 input_location = save_loc;
1904 init_asm_output (name);
1906 /* These create various _DECL nodes, so need to be called after the
1907 front end is initialized. */
1911 /* The following initialization functions need to generate rtl, so
1912 provide a dummy function context for them. */
1913 init_dummy_function_start ();
1915 expand_dummy_function_end ();
1917 /* If dbx symbol table desired, initialize writing it and output the
1918 predefined types. */
1919 timevar_push (TV_SYMOUT);
1921 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1922 if (dwarf2out_do_frame ())
1923 dwarf2out_frame_init ();
1926 /* Now we have the correct original filename, we can initialize
1928 (*debug_hooks->init) (name);
1930 timevar_pop (TV_SYMOUT);
1935 /* Clean up: close opened files, etc. */
1940 /* Close the dump files. */
1941 if (flag_gen_aux_info)
1943 fclose (aux_info_file);
1945 unlink (aux_info_file_name);
1948 /* Close non-debugging input and output files. Take special care to note
1949 whether fclose returns an error, since the pages might still be on the
1950 buffer chain while the file is open. */
1954 if (ferror (asm_out_file) != 0)
1955 fatal_error ("error writing to %s: %m", asm_file_name);
1956 if (fclose (asm_out_file) != 0)
1957 fatal_error ("error closing %s: %m", asm_file_name);
1960 finish_optimization_passes ();
1964 ggc_print_statistics ();
1965 stringpool_statistics ();
1966 dump_tree_statistics ();
1967 dump_rtx_statistics ();
1968 dump_varray_statistics ();
1969 dump_alloc_pool_statistics ();
1970 dump_ggc_loc_statistics ();
1973 /* Free up memory for the benefit of leak detectors. */
1976 /* Language-specific end of compilation actions. */
1977 lang_hooks.finish ();
1980 /* Initialize the compiler, and compile the input file. */
1984 /* Initialize timing first. The C front ends read the main file in
1985 the post_options hook, and C++ does file timings. */
1986 if (time_report || !quiet_flag || flag_detailed_statistics)
1988 timevar_start (TV_TOTAL);
1992 /* Don't do any more if an error has already occurred. */
1995 /* This must be run always, because it is needed to compute the FP
1996 predefined macros, such as __LDBL_MAX__, for targets using non
1997 default FP formats. */
1998 init_adjust_machine_modes ();
2000 /* Set up the back-end if requested. */
2004 /* Language-dependent initialization. Returns true on success. */
2005 if (lang_dependent_init (main_input_filename))
2011 /* Stop timing and print the times. */
2012 timevar_stop (TV_TOTAL);
2013 timevar_print (stderr);
2016 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2017 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2018 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2020 It is not safe to call this function more than once. */
2023 toplev_main (unsigned int argc, const char **argv)
2027 /* Initialization of GCC's environment, and diagnostics. */
2028 general_init (argv[0]);
2030 /* Parse the options and do minimal processing; basically just
2031 enough to default flags appropriately. */
2032 decode_options (argc, argv);
2036 /* Exit early if we can (e.g. -help). */
2037 if (!exit_after_options)
2040 if (errorcount || sorrycount)
2041 return (FATAL_EXIT_CODE);
2043 return (SUCCESS_EXIT_CODE);