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
23 /* This is the top level of cc1/c++.
24 It parses command args, opens files, invokes the various passes
25 in the proper order, and counts the time used by each.
26 Error messages and low-level interface to malloc also handled here. */
29 #undef FLOAT /* This is for hpux. They should change hpux. */
30 #undef FFS /* Some systems define this in param.h. */
32 #include "coretypes.h"
36 #ifdef HAVE_SYS_RESOURCE_H
37 # include <sys/resource.h>
40 #ifdef HAVE_SYS_TIMES_H
41 # include <sys/times.h>
51 #include "insn-attr.h"
52 #include "insn-config.h"
53 #include "insn-flags.h"
54 #include "hard-reg-set.h"
61 #include "basic-block.h"
67 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
86 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
87 #include "dwarf2out.h"
90 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
94 #ifdef SDB_DEBUGGING_INFO
98 #ifdef XCOFF_DEBUGGING_INFO
99 #include "xcoffout.h" /* Needed for external data
100 declarations for e.g. AIX 4.x. */
103 static void general_init (const char *);
104 static void do_compile (void);
105 static void process_options (void);
106 static void backend_init (void);
107 static int lang_dependent_init (const char *);
108 static void init_asm_output (const char *);
109 static void finalize (void);
111 static void crash_signal (int) ATTRIBUTE_NORETURN;
112 static void setup_core_dumping (void);
113 static void compile_file (void);
115 static int print_single_switch (FILE *, int, int, const char *,
116 const char *, const char *,
117 const char *, const char *);
118 static void print_switch_values (FILE *, int, int, const char *,
119 const char *, const char *);
121 /* Nonzero to dump debug info whilst parsing (-dy option). */
122 static int set_yydebug;
124 /* True if we don't need a backend (e.g. preprocessing only). */
125 static bool no_backend;
127 /* Length of line when printing switch values. */
130 /* Name of program invoked, sans directories. */
132 const char *progname;
134 /* Copy of argument vector to toplev_main. */
135 static const char **save_argv;
137 /* Name of top-level original source file (what was input to cpp).
138 This comes from the #-command at the beginning of the actual input.
139 If there isn't any there, then this is the cc1 input file name. */
141 const char *main_input_filename;
143 #ifndef USE_MAPPED_LOCATION
144 location_t unknown_location = { NULL, 0 };
147 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
148 to optimize and default_debug_hooks in process_options (). */
149 #define AUTODETECT_VALUE 2
151 /* Current position in real source file. */
153 location_t input_location;
155 struct line_maps line_table;
157 /* Nonzero if it is unsafe to create any new pseudo registers. */
160 /* Stack of currently pending input files. */
162 struct file_stack *input_file_stack;
164 /* Incremented on each change to input_file_stack. */
165 int input_file_stack_tick;
167 /* Name to use as base of names for dump output files. */
169 const char *dump_base_name;
171 /* Name to use as a base for auxiliary output files. */
173 const char *aux_base_name;
175 /* Bit flags that specify the machine subtype we are compiling for.
176 Bits are tested using macros TARGET_... defined in the tm.h file
177 and set by `-m...' switches. Must be defined in rtlanal.c. */
179 extern int target_flags;
181 /* A mask of target_flags that includes bit X if X was set or cleared
182 on the command line. */
184 int target_flags_explicit;
186 /* Debug hooks - dependent upon command line options. */
188 const struct gcc_debug_hooks *debug_hooks;
190 /* Debug hooks - target default. */
192 static const struct gcc_debug_hooks *default_debug_hooks;
194 /* Other flags saying which kinds of debugging dump have been requested. */
196 int rtl_dump_and_exit;
197 int flag_print_asm_name;
198 enum graph_dump_types graph_dump_format;
200 /* Name for output file of assembly code, specified with -o. */
202 const char *asm_file_name;
204 /* Nonzero means do optimizations. -O.
205 Particular numeric values stand for particular amounts of optimization;
206 thus, -O2 stores 2 here. However, the optimizations beyond the basic
207 ones are not controlled directly by this variable. Instead, they are
208 controlled by individual `flag_...' variables that are defaulted
209 based on this variable. */
213 /* Nonzero means optimize for size. -Os.
214 The only valid values are zero and nonzero. When optimize_size is
215 nonzero, optimize defaults to 2, but certain individual code
216 bloating optimizations are disabled. */
218 int optimize_size = 0;
220 /* The FUNCTION_DECL for the function currently being compiled,
221 or 0 if between functions. */
222 tree current_function_decl;
224 /* Set to the FUNC_BEGIN label of the current function, or NULL
226 const char * current_function_func_begin_label;
228 /* Temporarily suppress certain warnings.
229 This is set while reading code from a system header file. */
231 int in_system_header = 0;
233 /* Nonzero means to collect statistics which might be expensive
234 and to print them when we are done. */
235 int flag_detailed_statistics = 0;
237 /* A random sequence of characters, unless overridden by user. */
238 const char *flag_random_seed;
240 /* A local time stamp derived from the time of compilation. It will be
241 zero if the system cannot provide a time. It will be -1u, if the
242 user has specified a particular random seed. */
247 /* Nonzero means `char' should be signed. */
249 int flag_signed_char;
251 /* Nonzero means give an enum type only as many bytes as it needs. A value
252 of 2 means it has not yet been initialized. */
254 int flag_short_enums;
256 /* Nonzero if structures and unions should be returned in memory.
258 This should only be defined if compatibility with another compiler or
259 with an ABI is needed, because it results in slower code. */
261 #ifndef DEFAULT_PCC_STRUCT_RETURN
262 #define DEFAULT_PCC_STRUCT_RETURN 1
265 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
267 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
269 /* 0 means straightforward implementation of complex divide acceptable.
270 1 means wide ranges of inputs must work for complex divide.
271 2 means C99-like requirements for complex multiply and divide. */
273 int flag_complex_method = 1;
275 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
276 not just because the tree inliner turned us off. */
278 int flag_really_no_inline = 2;
280 /* Nonzero means we should be saving declaration info into a .X file. */
282 int flag_gen_aux_info = 0;
284 /* Specified name of aux-info file. */
286 const char *aux_info_file_name;
288 /* Nonzero if we are compiling code for a shared library, zero for
293 /* Generate code for GNU or NeXT Objective-C runtime environment. */
295 #ifdef NEXT_OBJC_RUNTIME
296 int flag_next_runtime = 1;
298 int flag_next_runtime = 0;
301 /* Set to the default thread-local storage (tls) model to use. */
303 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
305 /* Nonzero means change certain warnings into errors.
306 Usually these are warnings about failure to conform to some standard. */
308 int flag_pedantic_errors = 0;
310 /* -dA causes debug commentary information to be produced in
311 the generated assembly code (to make it more readable). This option
312 is generally only of use to those who actually need to read the
313 generated assembly code (perhaps while debugging the compiler itself).
314 Currently, this switch is only used by dwarfout.c; however, it is intended
315 to be a catchall for printing debug information in the assembler file. */
317 int flag_debug_asm = 0;
319 /* -dP causes the rtl to be emitted as a comment in assembly. */
321 int flag_dump_rtl_in_asm = 0;
323 /* When non-NULL, indicates that whenever space is allocated on the
324 stack, the resulting stack pointer must not pass this
325 address---that is, for stacks that grow downward, the stack pointer
326 must always be greater than or equal to this address; for stacks
327 that grow upward, the stack pointer must be less than this address.
328 At present, the rtx may be either a REG or a SYMBOL_REF, although
329 the support provided depends on the backend. */
332 /* If one, renumber instruction UIDs to reduce the number of
333 unused UIDs if there are a lot of instructions. If greater than
334 one, unconditionally renumber instruction UIDs. */
335 int flag_renumber_insns = 1;
337 /* Nonzero if we should track variables. When
338 flag_var_tracking == AUTODETECT_VALUE it will be set according
339 to optimize, debug_info_level and debug_hooks in process_options (). */
340 int flag_var_tracking = AUTODETECT_VALUE;
342 /* True if the user has tagged the function with the 'section'
345 bool user_defined_section_attribute = false;
347 /* Values of the -falign-* flags: how much to align labels in code.
348 0 means `use default', 1 means `don't align'.
349 For each variable, there is an _log variant which is the power
350 of two not less than the variable, for .align output. */
353 int align_loops_max_skip;
355 int align_jumps_max_skip;
356 int align_labels_log;
357 int align_labels_max_skip;
358 int align_functions_log;
360 /* Like align_functions_log above, but used by front-ends to force the
361 minimum function alignment. Zero means no alignment is forced. */
362 int force_align_functions_log;
366 const char *const string;
370 lang_independent_options;
372 /* Nonzero if subexpressions must be evaluated from left-to-right. */
373 int flag_evaluation_order = 0;
375 /* The user symbol prefix after having resolved same. */
376 const char *user_label_prefix;
378 static const param_info lang_independent_params[] = {
379 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
380 { OPTION, DEFAULT, MIN, MAX, HELP },
381 #include "params.def"
383 { NULL, 0, 0, 0, NULL }
386 /* Output files for assembler code (real compiler output)
387 and debugging dumps. */
391 FILE *dump_file = NULL;
392 const char *dump_file_name;
394 /* The current working directory of a translation. It's generally the
395 directory from which compilation was initiated, but a preprocessed
396 file may specify the original directory in which it was
399 static const char *src_pwd;
401 /* Initialize src_pwd with the given string, and return true. If it
402 was already initialized, return false. As a special case, it may
403 be called with a NULL argument to test whether src_pwd has NOT been
407 set_src_pwd (const char *pwd)
411 if (strcmp (src_pwd, pwd) == 0)
417 src_pwd = xstrdup (pwd);
421 /* Return the directory from which the translation unit was initiated,
422 in case set_src_pwd() was not called before to assign it a
438 /* Called when the start of a function definition is parsed,
439 this function prints on stderr the name of the function. */
441 announce_function (tree decl)
445 if (rtl_dump_and_exit)
446 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
448 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
450 pp_needs_newline (global_dc->printer) = true;
451 diagnostic_set_last_function (global_dc);
455 /* Set up a default flag_random_seed and local_tick, unless the user
456 already specified one. */
461 if (!flag_random_seed)
463 unsigned HOST_WIDE_INT value;
464 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
466 /* Get some more or less random data. */
467 #ifdef HAVE_GETTIMEOFDAY
471 gettimeofday (&tv, NULL);
472 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
476 time_t now = time (NULL);
478 if (now != (time_t)-1)
479 local_tick = (unsigned) now;
482 value = local_tick ^ getpid ();
484 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
485 flag_random_seed = random_seed;
487 else if (!local_tick)
492 /* Decode the string P as an integral parameter.
493 If the string is indeed an integer return its numeric value else
494 issue an Invalid Option error for the option PNAME and return DEFVAL.
495 If PNAME is zero just return DEFVAL, do not call error. */
498 read_integral_parameter (const char *p, const char *pname, const int defval)
500 const char *endp = p;
513 error ("invalid option argument %qs", pname);
520 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
521 for floor_log2 and exact_log2; see toplev.h. That construct, however,
522 conflicts with the ISO C++ One Definition Rule. */
524 #if GCC_VERSION < 3004 || !defined (__cplusplus)
526 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
527 If X is 0, return -1. */
530 floor_log2 (unsigned HOST_WIDE_INT x)
538 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
540 if (HOST_BITS_PER_WIDE_INT > 64)
541 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
543 if (HOST_BITS_PER_WIDE_INT > 32)
544 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
546 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
548 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
550 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
552 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
554 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
561 /* Return the logarithm of X, base 2, considering X unsigned,
562 if X is a power of 2. Otherwise, returns -1. */
565 exact_log2 (unsigned HOST_WIDE_INT x)
570 return x ? CTZ_HWI (x) : -1;
572 return floor_log2 (x);
576 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
578 /* Handler for fatal signals, such as SIGSEGV. These are transformed
579 into ICE messages, which is much more user friendly. In case the
580 error printer crashes, reset the signal to prevent infinite recursion. */
583 crash_signal (int signo)
585 signal (signo, SIG_DFL);
587 /* If we crashed while processing an ASM statement, then be a little more
588 graceful. It's most likely the user's fault. */
589 if (this_is_asm_operands)
591 output_operand_lossage ("unrecoverable error");
592 exit (FATAL_EXIT_CODE);
595 internal_error ("%s", strsignal (signo));
598 /* Arrange to dump core on error. (The regular error message is still
599 printed first, except in the case of abort().) */
602 setup_core_dumping (void)
605 signal (SIGABRT, SIG_DFL);
607 #if defined(HAVE_SETRLIMIT)
610 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
611 fatal_error ("getting core file size maximum limit: %m");
612 rlim.rlim_cur = rlim.rlim_max;
613 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
614 fatal_error ("setting core file size limit to maximum: %m");
617 diagnostic_abort_on_error (global_dc);
621 /* Strip off a legitimate source ending from the input string NAME of
622 length LEN. Rather than having to know the names used by all of
623 our front ends, we strip off an ending of a period followed by
624 up to five characters. (Java uses ".class".) */
627 strip_off_ending (char *name, int len)
630 for (i = 2; i < 6 && len > i; i++)
632 if (name[len - i] == '.')
634 name[len - i] = '\0';
640 /* Output a quoted string. */
643 output_quoted_string (FILE *asm_file, const char *string)
645 #ifdef OUTPUT_QUOTED_STRING
646 OUTPUT_QUOTED_STRING (asm_file, string);
650 putc ('\"', asm_file);
651 while ((c = *string++) != 0)
655 if (c == '\"' || c == '\\')
656 putc ('\\', asm_file);
660 fprintf (asm_file, "\\%03o", (unsigned char) c);
662 putc ('\"', asm_file);
666 /* Output a file name in the form wanted by System V. */
669 output_file_directive (FILE *asm_file, const char *input_name)
674 if (input_name == NULL)
675 input_name = "<stdin>";
677 len = strlen (input_name);
678 na = input_name + len;
680 /* NA gets INPUT_NAME sans directory names. */
681 while (na > input_name)
683 if (IS_DIR_SEPARATOR (na[-1]))
688 #ifdef ASM_OUTPUT_SOURCE_FILENAME
689 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
691 fprintf (asm_file, "\t.file\t");
692 output_quoted_string (asm_file, na);
693 fputc ('\n', asm_file);
697 /* A subroutine of wrapup_global_declarations. We've come to the end of
698 the compilation unit. All deferred variables should be undeferred,
699 and all incomplete decls should be finalized. */
702 wrapup_global_declaration_1 (tree decl)
704 /* We're not deferring this any longer. Assignment is conditional to
705 avoid needlessly dirtying PCH pages. */
706 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
707 && DECL_DEFER_OUTPUT (decl) != 0)
708 DECL_DEFER_OUTPUT (decl) = 0;
710 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
711 lang_hooks.finish_incomplete_decl (decl);
714 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
715 needs to be output. Return true if it is output. */
718 wrapup_global_declaration_2 (tree decl)
720 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
723 /* Don't write out static consts, unless we still need them.
725 We also keep static consts if not optimizing (for debugging),
726 unless the user specified -fno-keep-static-consts.
727 ??? They might be better written into the debug information.
728 This is possible when using DWARF.
730 A language processor that wants static constants to be always
731 written out (even if it is not used) is responsible for
732 calling rest_of_decl_compilation itself. E.g. the C front-end
733 calls rest_of_decl_compilation from finish_decl.
734 One motivation for this is that is conventional in some
735 environments to write things like:
736 static const char rcsid[] = "... version string ...";
737 intending to force the string to be in the executable.
739 A language processor that would prefer to have unneeded
740 static constants "optimized away" would just defer writing
741 them out until here. E.g. C++ does this, because static
742 constants are often defined in header files.
744 ??? A tempting alternative (for both C and C++) would be
745 to force a constant to be written if and only if it is
746 defined in a main file, as opposed to an include file. */
748 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
750 struct cgraph_varpool_node *node;
752 node = cgraph_varpool_node (decl);
756 else if (node->alias)
758 else if (!cgraph_global_info_ready
760 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
762 else if (node->needed)
764 else if (DECL_COMDAT (decl))
766 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
767 && (optimize || !flag_keep_static_consts
768 || DECL_ARTIFICIAL (decl)))
773 rest_of_decl_compilation (decl, 1, 1);
781 /* Do any final processing required for the declarations in VEC, of
782 which there are LEN. We write out inline functions and variables
783 that have been deferred until this point, but which are required.
784 Returns nonzero if anything was put out. */
787 wrapup_global_declarations (tree *vec, int len)
789 bool reconsider, output_something = false;
792 for (i = 0; i < len; i++)
793 wrapup_global_declaration_1 (vec[i]);
795 /* Now emit any global variables or functions that we have been
796 putting off. We need to loop in case one of the things emitted
797 here references another one which comes earlier in the list. */
801 for (i = 0; i < len; i++)
802 reconsider |= wrapup_global_declaration_2 (vec[i]);
804 output_something = true;
808 return output_something;
811 /* A subroutine of check_global_declarations. Issue appropriate warnings
812 for the global declaration DECL. */
815 check_global_declaration_1 (tree decl)
817 /* Warn about any function declared static but not defined. We don't
818 warn about variables, because many programs have static variables
819 that exist only to get some text into the object file. */
820 if (TREE_CODE (decl) == FUNCTION_DECL
821 && DECL_INITIAL (decl) == 0
822 && DECL_EXTERNAL (decl)
823 && ! DECL_ARTIFICIAL (decl)
824 && ! TREE_NO_WARNING (decl)
825 && ! TREE_PUBLIC (decl)
826 && (warn_unused_function
827 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
829 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
830 pedwarn ("%q+F used but never defined", decl);
832 warning (0, "%q+F declared %<static%> but never defined", decl);
833 /* This symbol is effectively an "extern" declaration now. */
834 TREE_PUBLIC (decl) = 1;
835 assemble_external (decl);
838 /* Warn about static fns or vars defined but not used. */
839 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
840 /* We don't warn about "static const" variables because the
841 "rcs_id" idiom uses that construction. */
842 || (warn_unused_variable
843 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
844 && ! DECL_IN_SYSTEM_HEADER (decl)
845 && ! TREE_USED (decl)
846 /* The TREE_USED bit for file-scope decls is kept in the identifier,
847 to handle multiple external decls in different scopes. */
848 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
849 && ! DECL_EXTERNAL (decl)
850 && ! TREE_PUBLIC (decl)
851 /* A volatile variable might be used in some non-obvious way. */
852 && ! TREE_THIS_VOLATILE (decl)
853 /* Global register variables must be declared to reserve them. */
854 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
855 /* Otherwise, ask the language. */
856 && lang_hooks.decls.warn_unused_global (decl))
857 warning (0, "%q+D defined but not used", decl);
860 /* Issue appropriate warnings for the global declarations in VEC (of
861 which there are LEN). */
864 check_global_declarations (tree *vec, int len)
868 for (i = 0; i < len; i++)
869 check_global_declaration_1 (vec[i]);
872 /* Emit debugging information for all global declarations in VEC. */
875 emit_debug_global_declarations (tree *vec, int len)
879 /* Avoid confusing the debug information machinery when there are errors. */
880 if (errorcount != 0 || sorrycount != 0)
883 timevar_push (TV_SYMOUT);
884 for (i = 0; i < len; i++)
885 debug_hooks->global_decl (vec[i]);
886 timevar_pop (TV_SYMOUT);
889 /* Warn about a use of an identifier which was marked deprecated. */
891 warn_deprecated_use (tree node)
893 if (node == 0 || !warn_deprecated_decl)
898 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
899 warning (OPT_Wdeprecated_declarations,
900 "%qs is deprecated (declared at %s:%d)",
901 IDENTIFIER_POINTER (DECL_NAME (node)),
902 xloc.file, xloc.line);
904 else if (TYPE_P (node))
906 const char *what = NULL;
907 tree decl = TYPE_STUB_DECL (node);
909 if (TYPE_NAME (node))
911 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
912 what = IDENTIFIER_POINTER (TYPE_NAME (node));
913 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
914 && DECL_NAME (TYPE_NAME (node)))
915 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
920 expanded_location xloc
921 = expand_location (DECL_SOURCE_LOCATION (decl));
923 warning (OPT_Wdeprecated_declarations,
924 "%qs is deprecated (declared at %s:%d)", what,
925 xloc.file, xloc.line);
927 warning (OPT_Wdeprecated_declarations,
928 "type is deprecated (declared at %s:%d)",
929 xloc.file, xloc.line);
934 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
936 warning (OPT_Wdeprecated_declarations, "type is deprecated");
941 /* Save the current INPUT_LOCATION on the top entry in the
942 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
943 INPUT_LOCATION accordingly. */
946 #ifdef USE_MAPPED_LOCATION
947 push_srcloc (location_t fline)
949 push_srcloc (const char *file, int line)
952 struct file_stack *fs;
954 fs = XNEW (struct file_stack);
955 fs->location = input_location;
956 fs->next = input_file_stack;
957 #ifdef USE_MAPPED_LOCATION
958 input_location = fline;
960 input_filename = file;
963 input_file_stack = fs;
964 input_file_stack_tick++;
967 /* Pop the top entry off the stack of presently open source files.
968 Restore the INPUT_LOCATION from the new topmost entry on the
974 struct file_stack *fs;
976 fs = input_file_stack;
977 input_location = fs->location;
978 input_file_stack = fs->next;
980 input_file_stack_tick++;
983 /* Compile an entire translation unit. Write a file of assembly
984 output and various debugging dumps. */
989 /* Initialize yet another pass. */
992 init_final (main_input_filename);
993 coverage_init (aux_base_name);
995 timevar_push (TV_PARSE);
997 /* Call the parser, which parses the entire file (calling
998 rest_of_compilation for each function). */
999 lang_hooks.parse_file (set_yydebug);
1001 /* In case there were missing block closers,
1002 get us back to the global binding level. */
1003 lang_hooks.clear_binding_stack ();
1005 /* Compilation is now finished except for writing
1006 what's left of the symbol table output. */
1007 timevar_pop (TV_PARSE);
1009 if (flag_syntax_only)
1012 lang_hooks.decls.final_write_globals ();
1013 cgraph_varpool_assemble_pending_decls ();
1014 finish_aliases_2 ();
1016 /* This must occur after the loop to output deferred functions.
1017 Else the coverage initializer would not be emitted if all the
1018 functions in this compilation unit were deferred. */
1021 /* Likewise for mudflap static object registrations. */
1023 mudflap_finish_file ();
1025 output_object_blocks ();
1027 /* Write out any pending weak symbol declarations. */
1031 /* Do dbx symbols. */
1032 timevar_push (TV_SYMOUT);
1034 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1035 if (dwarf2out_do_frame ())
1036 dwarf2out_frame_finish ();
1039 (*debug_hooks->finish) (main_input_filename);
1040 timevar_pop (TV_SYMOUT);
1042 /* Output some stuff at end of file if nec. */
1044 dw2_output_indirect_constants ();
1046 /* Flush any pending external directives. cgraph did this for
1047 assemble_external calls from the front end, but the RTL
1048 expander can also generate them. */
1049 process_pending_assemble_externals ();
1051 /* Attach a special .ident directive to the end of the file to identify
1052 the version of GCC which compiled this code. The format of the .ident
1053 string is patterned after the ones produced by native SVR4 compilers. */
1056 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1057 IDENT_ASM_OP, version_string);
1060 /* This must be at the end. Some target ports emit end of file directives
1061 into the assembly file here, and hence we can not output anything to the
1062 assembly file after this point. */
1063 targetm.asm_out.file_end ();
1066 /* Parse a -d... command line switch. */
1069 decode_d_option (const char *arg)
1080 flag_print_asm_name = 1;
1083 flag_dump_rtl_in_asm = 1;
1084 flag_print_asm_name = 1;
1087 graph_dump_format = vcg;
1090 rtl_dump_and_exit = 1;
1095 case 'D': /* These are handled by the preprocessor. */
1099 setup_core_dumping();
1104 if (!enable_rtl_dump_file (c))
1105 warning (0, "unrecognized gcc debugging option: %c", c);
1110 /* Indexed by enum debug_info_type. */
1111 const char *const debug_type_names[] =
1113 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1116 /* Print version information to FILE.
1117 Each line begins with INDENT (for the case where FILE is the
1118 assembler output file). */
1121 print_version (FILE *file, const char *indent)
1123 static const char fmt1[] =
1125 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1127 N_("%s%s%s version %s (%s) compiled by CC.\n")
1130 static const char fmt2[] =
1131 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1133 #define __VERSION__ "[?]"
1136 file == stderr ? _(fmt1) : fmt1,
1137 indent, *indent != 0 ? " " : "",
1138 lang_hooks.name, version_string, TARGET_NAME,
1139 indent, __VERSION__);
1141 file == stderr ? _(fmt2) : fmt2,
1142 indent, *indent != 0 ? " " : "",
1143 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1146 /* Print an option value and return the adjusted position in the line.
1147 ??? We don't handle error returns from fprintf (disk full); presumably
1148 other code will catch a disk full though. */
1151 print_single_switch (FILE *file, int pos, int max,
1152 const char *indent, const char *sep, const char *term,
1153 const char *type, const char *name)
1155 /* The ultrix fprintf returns 0 on success, so compute the result we want
1156 here since we need it for the following test. */
1157 int len = strlen (sep) + strlen (type) + strlen (name);
1162 fprintf (file, "%s", term);
1167 fprintf (file, "%s", indent);
1168 pos = strlen (indent);
1170 fprintf (file, "%s%s%s", sep, type, name);
1175 /* Print active target switches to FILE.
1176 POS is the current cursor position and MAX is the size of a "line".
1177 Each line begins with INDENT and ends with TERM.
1178 Each switch is separated from the next by SEP. */
1181 print_switch_values (FILE *file, int pos, int max,
1182 const char *indent, const char *sep, const char *term)
1187 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1188 that it can be printed below. This helps reproducibility. */
1191 /* Print the options as passed. */
1192 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1193 _("options passed: "), "");
1195 for (p = &save_argv[1]; *p != NULL; p++)
1199 if (strcmp (*p, "-o") == 0)
1205 if (strcmp (*p, "-quiet") == 0)
1207 if (strcmp (*p, "-version") == 0)
1212 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1215 fprintf (file, "%s", term);
1217 /* Print the -f and -m options that have been enabled.
1218 We don't handle language specific options but printing argv
1221 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1222 _("options enabled: "), "");
1224 for (j = 0; j < cl_options_count; j++)
1225 if ((cl_options[j].flags & CL_REPORT)
1226 && option_enabled (j) > 0)
1227 pos = print_single_switch (file, pos, max, indent, sep, term,
1228 "", cl_options[j].opt_text);
1230 fprintf (file, "%s", term);
1233 /* Open assembly code output file. Do this even if -fsyntax-only is
1234 on, because then the driver will have provided the name of a
1235 temporary file or bit bucket for us. NAME is the file specified on
1236 the command line, possibly NULL. */
1238 init_asm_output (const char *name)
1240 if (name == NULL && asm_file_name == 0)
1241 asm_out_file = stdout;
1244 if (asm_file_name == 0)
1246 int len = strlen (dump_base_name);
1247 char *dumpname = XNEWVEC (char, len + 6);
1248 memcpy (dumpname, dump_base_name, len + 1);
1249 strip_off_ending (dumpname, len);
1250 strcat (dumpname, ".s");
1251 asm_file_name = dumpname;
1253 if (!strcmp (asm_file_name, "-"))
1254 asm_out_file = stdout;
1256 asm_out_file = fopen (asm_file_name, "w+b");
1257 if (asm_out_file == 0)
1258 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1261 if (!flag_syntax_only)
1263 targetm.asm_out.file_start ();
1265 #ifdef ASM_COMMENT_START
1266 if (flag_verbose_asm)
1268 /* Print the list of options in effect. */
1269 print_version (asm_out_file, ASM_COMMENT_START);
1270 print_switch_values (asm_out_file, 0, MAX_LINE,
1271 ASM_COMMENT_START, " ", "\n");
1272 /* Add a blank line here so it appears in assembler output but not
1274 fprintf (asm_out_file, "\n");
1280 /* Return true if the state of option OPTION should be stored in PCH files
1281 and checked by default_pch_valid_p. Store the option's current state
1285 option_affects_pch_p (int option, struct cl_option_state *state)
1287 if ((cl_options[option].flags & CL_TARGET) == 0)
1289 if (cl_options[option].flag_var == &target_flags)
1290 if (targetm.check_pch_target_flags)
1292 return get_option_state (option, state);
1295 /* Default version of get_pch_validity.
1296 By default, every flag difference is fatal; that will be mostly right for
1297 most targets, but completely right for very few. */
1300 default_get_pch_validity (size_t *len)
1302 struct cl_option_state state;
1307 if (targetm.check_pch_target_flags)
1308 *len += sizeof (target_flags);
1309 for (i = 0; i < cl_options_count; i++)
1310 if (option_affects_pch_p (i, &state))
1313 result = r = XNEWVEC (char, *len);
1317 if (targetm.check_pch_target_flags)
1319 memcpy (r, &target_flags, sizeof (target_flags));
1320 r += sizeof (target_flags);
1323 for (i = 0; i < cl_options_count; i++)
1324 if (option_affects_pch_p (i, &state))
1326 memcpy (r, state.data, state.size);
1333 /* Return a message which says that a PCH file was created with a different
1334 setting of OPTION. */
1337 pch_option_mismatch (const char *option)
1341 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1343 return _("out of memory");
1347 /* Default version of pch_valid_p. */
1350 default_pch_valid_p (const void *data_p, size_t len)
1352 struct cl_option_state state;
1353 const char *data = (const char *)data_p;
1356 /* -fpic and -fpie also usually make a PCH invalid. */
1357 if (data[0] != flag_pic)
1358 return _("created and used with different settings of -fpic");
1359 if (data[1] != flag_pie)
1360 return _("created and used with different settings of -fpie");
1363 /* Check target_flags. */
1364 if (targetm.check_pch_target_flags)
1369 memcpy (&tf, data, sizeof (target_flags));
1370 data += sizeof (target_flags);
1371 len -= sizeof (target_flags);
1372 r = targetm.check_pch_target_flags (tf);
1377 for (i = 0; i < cl_options_count; i++)
1378 if (option_affects_pch_p (i, &state))
1380 if (memcmp (data, state.data, state.size) != 0)
1381 return pch_option_mismatch (cl_options[i].opt_text);
1389 /* Default tree printer. Handles declarations only. */
1391 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1392 int precision, bool wide, bool set_locus, bool hash)
1396 /* FUTURE: %+x should set the locus. */
1397 if (precision != 0 || wide || hash)
1403 t = va_arg (*text->args_ptr, tree);
1404 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1405 t = DECL_DEBUG_EXPR (t);
1410 t = va_arg (*text->args_ptr, tree);
1417 if (set_locus && text->locus)
1418 *text->locus = DECL_SOURCE_LOCATION (t);
1422 const char *n = DECL_NAME (t)
1423 ? lang_hooks.decl_printable_name (t, 2)
1428 dump_generic_node (pp, t, 0, 0, 0);
1433 /* Initialization of the front end environment, before command line
1434 options are parsed. Signal handlers, internationalization etc.
1435 ARGV0 is main's argv[0]. */
1437 general_init (const char *argv0)
1441 p = argv0 + strlen (argv0);
1442 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1446 xmalloc_set_program_name (progname);
1450 /* Unlock the stdio streams. */
1451 unlock_std_streams ();
1453 gcc_init_libintl ();
1455 /* Initialize the diagnostics reporting machinery, so option parsing
1456 can give warnings and errors. */
1457 diagnostic_initialize (global_dc);
1458 /* Set a default printer. Language specific initializations will
1459 override it later. */
1460 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1462 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1464 signal (SIGSEGV, crash_signal);
1467 signal (SIGILL, crash_signal);
1470 signal (SIGBUS, crash_signal);
1473 signal (SIGABRT, crash_signal);
1475 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1476 signal (SIGIOT, crash_signal);
1479 signal (SIGFPE, crash_signal);
1482 /* Other host-specific signal setup. */
1483 (*host_hooks.extra_signals)();
1485 /* Initialize the garbage-collector, string pools and tree type hash
1489 linemap_init (&line_table);
1492 /* Initialize register usage now so switches may override. */
1495 /* Register the language-independent parameters. */
1496 add_params (lang_independent_params, LAST_PARAM);
1498 /* This must be done after add_params but before argument processing. */
1499 init_ggc_heuristics();
1500 init_optimization_passes ();
1503 /* Return true if the current target supports -fsection-anchors. */
1506 target_supports_section_anchors_p (void)
1508 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1511 if (targetm.asm_out.output_anchor == NULL)
1517 /* Process the options that have been parsed. */
1519 process_options (void)
1521 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1522 This can happen with incorrect pre-processed input. */
1523 debug_hooks = &do_nothing_debug_hooks;
1525 /* Allow the front end to perform consistency checks and do further
1526 initialization based on the command line options. This hook also
1527 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1528 so we can correctly initialize debug output. */
1529 no_backend = lang_hooks.post_options (&main_input_filename);
1530 #ifndef USE_MAPPED_LOCATION
1531 input_filename = main_input_filename;
1534 #ifdef OVERRIDE_OPTIONS
1535 /* Some machines may reject certain combinations of options. */
1539 if (flag_section_anchors && !target_supports_section_anchors_p ())
1541 warning (OPT_fsection_anchors,
1542 "this target does not support %qs", "-fsection-anchors");
1543 flag_section_anchors = 0;
1546 if (flag_short_enums == 2)
1547 flag_short_enums = targetm.default_short_enums ();
1549 /* Set aux_base_name if not already set. */
1552 else if (main_input_filename)
1554 char *name = xstrdup (lbasename (main_input_filename));
1556 strip_off_ending (name, strlen (name));
1557 aux_base_name = name;
1560 aux_base_name = "gccaux";
1562 /* Set up the align_*_log variables, defaulting them to 1 if they
1563 were still unset. */
1564 if (align_loops <= 0) align_loops = 1;
1565 if (align_loops_max_skip > align_loops || !align_loops)
1566 align_loops_max_skip = align_loops - 1;
1567 align_loops_log = floor_log2 (align_loops * 2 - 1);
1568 if (align_jumps <= 0) align_jumps = 1;
1569 if (align_jumps_max_skip > align_jumps || !align_jumps)
1570 align_jumps_max_skip = align_jumps - 1;
1571 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1572 if (align_labels <= 0) align_labels = 1;
1573 align_labels_log = floor_log2 (align_labels * 2 - 1);
1574 if (align_labels_max_skip > align_labels || !align_labels)
1575 align_labels_max_skip = align_labels - 1;
1576 if (align_functions <= 0) align_functions = 1;
1577 align_functions_log = floor_log2 (align_functions * 2 - 1);
1579 /* Unrolling all loops implies that standard loop unrolling must also
1581 if (flag_unroll_all_loops)
1582 flag_unroll_loops = 1;
1584 /* The loop unrolling code assumes that cse will be run after loop.
1585 web and rename-registers also help when run after loop unrolling. */
1587 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1588 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1589 if (flag_web == AUTODETECT_VALUE)
1590 flag_web = flag_unroll_loops || flag_peel_loops;
1591 if (flag_rename_registers == AUTODETECT_VALUE)
1592 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1594 if (flag_non_call_exceptions)
1595 flag_asynchronous_unwind_tables = 1;
1596 if (flag_asynchronous_unwind_tables)
1597 flag_unwind_tables = 1;
1599 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1601 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1602 flag_unit_at_a_time = 0;
1604 if (!flag_unit_at_a_time)
1605 flag_section_anchors = 0;
1607 if (flag_value_profile_transformations)
1608 flag_profile_values = 1;
1610 /* Warn about options that are not supported on this machine. */
1611 #ifndef INSN_SCHEDULING
1612 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1613 warning (0, "instruction scheduling not supported on this target machine");
1616 if (flag_delayed_branch)
1617 warning (0, "this target machine does not have delayed branches");
1620 user_label_prefix = USER_LABEL_PREFIX;
1621 if (flag_leading_underscore != -1)
1623 /* If the default prefix is more complicated than "" or "_",
1624 issue a warning and ignore this option. */
1625 if (user_label_prefix[0] == 0 ||
1626 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1628 user_label_prefix = flag_leading_underscore ? "_" : "";
1631 warning (0, "-f%sleading-underscore not supported on this target machine",
1632 flag_leading_underscore ? "" : "no-");
1635 /* If we are in verbose mode, write out the version and maybe all the
1636 option flags in use. */
1639 print_version (stderr, "");
1641 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
1644 if (flag_syntax_only)
1646 write_symbols = NO_DEBUG;
1650 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1652 if (debug_info_level == DINFO_LEVEL_NONE)
1653 write_symbols = NO_DEBUG;
1655 /* Now we know write_symbols, set up the debug hooks based on it.
1656 By default we do nothing for debug output. */
1657 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1658 default_debug_hooks = &do_nothing_debug_hooks;
1659 #if defined(DBX_DEBUGGING_INFO)
1660 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1661 default_debug_hooks = &dbx_debug_hooks;
1663 #if defined(XCOFF_DEBUGGING_INFO)
1664 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1665 default_debug_hooks = &xcoff_debug_hooks;
1667 #ifdef SDB_DEBUGGING_INFO
1668 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1669 default_debug_hooks = &sdb_debug_hooks;
1671 #ifdef DWARF2_DEBUGGING_INFO
1672 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1673 default_debug_hooks = &dwarf2_debug_hooks;
1675 #ifdef VMS_DEBUGGING_INFO
1676 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1677 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1678 default_debug_hooks = &vmsdbg_debug_hooks;
1681 if (write_symbols == NO_DEBUG)
1683 #if defined(DBX_DEBUGGING_INFO)
1684 else if (write_symbols == DBX_DEBUG)
1685 debug_hooks = &dbx_debug_hooks;
1687 #if defined(XCOFF_DEBUGGING_INFO)
1688 else if (write_symbols == XCOFF_DEBUG)
1689 debug_hooks = &xcoff_debug_hooks;
1691 #ifdef SDB_DEBUGGING_INFO
1692 else if (write_symbols == SDB_DEBUG)
1693 debug_hooks = &sdb_debug_hooks;
1695 #ifdef DWARF2_DEBUGGING_INFO
1696 else if (write_symbols == DWARF2_DEBUG)
1697 debug_hooks = &dwarf2_debug_hooks;
1699 #ifdef VMS_DEBUGGING_INFO
1700 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1701 debug_hooks = &vmsdbg_debug_hooks;
1704 error ("target system does not support the \"%s\" debug format",
1705 debug_type_names[write_symbols]);
1707 /* Now we know which debug output will be used so we can set
1708 flag_var_tracking, flag_rename_registers if the user has
1709 not specified them. */
1710 if (debug_info_level < DINFO_LEVEL_NORMAL
1711 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1713 if (flag_var_tracking == 1)
1715 if (debug_info_level < DINFO_LEVEL_NORMAL)
1716 warning (0, "variable tracking requested, but useless unless "
1717 "producing debug info");
1719 warning (0, "variable tracking requested, but not supported "
1720 "by this debug format");
1722 flag_var_tracking = 0;
1725 if (flag_rename_registers == AUTODETECT_VALUE)
1726 flag_rename_registers = default_debug_hooks->var_location
1727 != do_nothing_debug_hooks.var_location;
1729 if (flag_var_tracking == AUTODETECT_VALUE)
1730 flag_var_tracking = optimize >= 1;
1732 /* If auxiliary info generation is desired, open the output file.
1733 This goes in the same directory as the source file--unlike
1734 all the other output files. */
1735 if (flag_gen_aux_info)
1737 aux_info_file = fopen (aux_info_file_name, "w");
1738 if (aux_info_file == 0)
1739 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1742 if (! targetm.have_named_sections)
1744 if (flag_function_sections)
1746 warning (0, "-ffunction-sections not supported for this target");
1747 flag_function_sections = 0;
1749 if (flag_data_sections)
1751 warning (0, "-fdata-sections not supported for this target");
1752 flag_data_sections = 0;
1756 if (flag_function_sections && profile_flag)
1758 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1759 flag_function_sections = 0;
1762 #ifndef HAVE_prefetch
1763 if (flag_prefetch_loop_arrays)
1765 warning (0, "-fprefetch-loop-arrays not supported for this target");
1766 flag_prefetch_loop_arrays = 0;
1769 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1771 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1772 flag_prefetch_loop_arrays = 0;
1776 /* This combination of options isn't handled for i386 targets and doesn't
1777 make much sense anyway, so don't allow it. */
1778 if (flag_prefetch_loop_arrays && optimize_size)
1780 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1781 flag_prefetch_loop_arrays = 0;
1784 #ifndef OBJECT_FORMAT_ELF
1785 if (flag_function_sections && write_symbols != NO_DEBUG)
1786 warning (0, "-ffunction-sections may affect debugging on some targets");
1789 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1790 if (flag_signaling_nans)
1791 flag_trapping_math = 1;
1793 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1794 if (flag_cx_limited_range)
1795 flag_complex_method = 0;
1797 /* Targets must be able to place spill slots at lower addresses. If the
1798 target already uses a soft frame pointer, the transition is trivial. */
1799 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1801 warning (0, "-fstack-protector not supported for this target");
1802 flag_stack_protect = 0;
1804 if (!flag_stack_protect)
1805 warn_stack_protect = 0;
1807 /* ??? Unwind info is not correct around the CFG unless either a frame
1808 pointer is present or A_O_A is set. Fixing this requires rewriting
1809 unwind info generation to be aware of the CFG and propagating states
1811 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1812 && flag_omit_frame_pointer)
1814 warning (0, "unwind tables currently requires a frame pointer "
1816 flag_omit_frame_pointer = 0;
1820 /* Initialize the compiler back end. */
1824 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1825 || debug_info_level == DINFO_LEVEL_VERBOSE
1826 #ifdef VMS_DEBUGGING_INFO
1827 /* Enable line number info for traceback. */
1828 || debug_info_level > DINFO_LEVEL_NONE
1830 || flag_test_coverage);
1834 init_fake_stack_mems ();
1838 init_varasm_once ();
1840 /* The following initialization functions need to generate rtl, so
1841 provide a dummy function context for them. */
1842 init_dummy_function_start ();
1844 if (flag_caller_saves)
1845 init_caller_save ();
1846 expand_dummy_function_end ();
1849 /* Language-dependent initialization. Returns nonzero on success. */
1851 lang_dependent_init (const char *name)
1853 location_t save_loc = input_location;
1854 if (dump_base_name == 0)
1855 dump_base_name = name && name[0] ? name : "gccdump";
1857 /* Other front-end initialization. */
1858 #ifdef USE_MAPPED_LOCATION
1859 input_location = BUILTINS_LOCATION;
1861 input_filename = "<built-in>";
1864 if (lang_hooks.init () == 0)
1866 input_location = save_loc;
1868 init_asm_output (name);
1870 /* These create various _DECL nodes, so need to be called after the
1871 front end is initialized. */
1875 /* The following initialization functions need to generate rtl, so
1876 provide a dummy function context for them. */
1877 init_dummy_function_start ();
1879 expand_dummy_function_end ();
1881 /* If dbx symbol table desired, initialize writing it and output the
1882 predefined types. */
1883 timevar_push (TV_SYMOUT);
1885 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1886 if (dwarf2out_do_frame ())
1887 dwarf2out_frame_init ();
1890 /* Now we have the correct original filename, we can initialize
1892 (*debug_hooks->init) (name);
1894 timevar_pop (TV_SYMOUT);
1899 /* Clean up: close opened files, etc. */
1904 /* Close the dump files. */
1905 if (flag_gen_aux_info)
1907 fclose (aux_info_file);
1909 unlink (aux_info_file_name);
1912 /* Close non-debugging input and output files. Take special care to note
1913 whether fclose returns an error, since the pages might still be on the
1914 buffer chain while the file is open. */
1918 if (ferror (asm_out_file) != 0)
1919 fatal_error ("error writing to %s: %m", asm_file_name);
1920 if (fclose (asm_out_file) != 0)
1921 fatal_error ("error closing %s: %m", asm_file_name);
1924 finish_optimization_passes ();
1928 ggc_print_statistics ();
1929 stringpool_statistics ();
1930 dump_tree_statistics ();
1931 dump_rtx_statistics ();
1932 dump_varray_statistics ();
1933 dump_alloc_pool_statistics ();
1934 dump_ggc_loc_statistics ();
1937 /* Free up memory for the benefit of leak detectors. */
1940 /* Language-specific end of compilation actions. */
1941 lang_hooks.finish ();
1944 /* Initialize the compiler, and compile the input file. */
1948 /* Initialize timing first. The C front ends read the main file in
1949 the post_options hook, and C++ does file timings. */
1950 if (time_report || !quiet_flag || flag_detailed_statistics)
1952 timevar_start (TV_TOTAL);
1956 /* Don't do any more if an error has already occurred. */
1959 /* This must be run always, because it is needed to compute the FP
1960 predefined macros, such as __LDBL_MAX__, for targets using non
1961 default FP formats. */
1962 init_adjust_machine_modes ();
1964 /* Set up the back-end if requested. */
1968 /* Language-dependent initialization. Returns true on success. */
1969 if (lang_dependent_init (main_input_filename))
1975 /* Stop timing and print the times. */
1976 timevar_stop (TV_TOTAL);
1977 timevar_print (stderr);
1980 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1981 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1982 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1984 It is not safe to call this function more than once. */
1987 toplev_main (unsigned int argc, const char **argv)
1991 /* Initialization of GCC's environment, and diagnostics. */
1992 general_init (argv[0]);
1994 /* Parse the options and do minimal processing; basically just
1995 enough to default flags appropriately. */
1996 decode_options (argc, argv);
2000 /* Exit early if we can (e.g. -help). */
2001 if (!exit_after_options)
2004 if (errorcount || sorrycount)
2005 return (FATAL_EXIT_CODE);
2007 return (SUCCESS_EXIT_CODE);