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 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
69 #include "dwarf2asm.h"
70 #include "integrate.h"
74 #include "langhooks.h"
75 #include "cfglayout.h"
77 #include "hosthooks.h"
81 #include "value-prof.h"
82 #include "alloc-pool.h"
83 #include "tree-mudflap.h"
85 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
86 #include "dwarf2out.h"
89 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
93 #ifdef SDB_DEBUGGING_INFO
97 #ifdef XCOFF_DEBUGGING_INFO
98 #include "xcoffout.h" /* Needed for external data
99 declarations for e.g. AIX 4.x. */
102 static void general_init (const char *);
103 static void do_compile (void);
104 static void process_options (void);
105 static void backend_init (void);
106 static int lang_dependent_init (const char *);
107 static void init_asm_output (const char *);
108 static void finalize (void);
110 static void crash_signal (int) ATTRIBUTE_NORETURN;
111 static void setup_core_dumping (void);
112 static void compile_file (void);
114 static int print_single_switch (FILE *, int, int, const char *,
115 const char *, const char *,
116 const char *, const char *);
117 static void print_switch_values (FILE *, int, int, const char *,
118 const char *, const char *);
120 /* Nonzero to dump debug info whilst parsing (-dy option). */
121 static int set_yydebug;
123 /* True if we don't need a backend (e.g. preprocessing only). */
124 static bool no_backend;
126 /* Length of line when printing switch values. */
129 /* Name of program invoked, sans directories. */
131 const char *progname;
133 /* Copy of argument vector to toplev_main. */
134 static const char **save_argv;
136 /* Name of top-level original source file (what was input to cpp).
137 This comes from the #-command at the beginning of the actual input.
138 If there isn't any there, then this is the cc1 input file name. */
140 const char *main_input_filename;
142 #ifndef USE_MAPPED_LOCATION
143 location_t unknown_location = { NULL, 0 };
146 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
147 to optimize and default_debug_hooks in process_options (). */
148 #define AUTODETECT_VALUE 2
150 /* Current position in real source file. */
152 location_t input_location;
154 struct line_maps line_table;
156 /* Nonzero if it is unsafe to create any new pseudo registers. */
159 /* Stack of currently pending input files. */
161 struct file_stack *input_file_stack;
163 /* Incremented on each change to input_file_stack. */
164 int input_file_stack_tick;
166 /* Name to use as base of names for dump output files. */
168 const char *dump_base_name;
170 /* Name to use as a base for auxiliary output files. */
172 const char *aux_base_name;
174 /* Bit flags that specify the machine subtype we are compiling for.
175 Bits are tested using macros TARGET_... defined in the tm.h file
176 and set by `-m...' switches. Must be defined in rtlanal.c. */
178 extern int target_flags;
180 /* A mask of target_flags that includes bit X if X was set or cleared
181 on the command line. */
183 int target_flags_explicit;
185 /* Debug hooks - dependent upon command line options. */
187 const struct gcc_debug_hooks *debug_hooks;
189 /* Debug hooks - target default. */
191 static const struct gcc_debug_hooks *default_debug_hooks;
193 /* Other flags saying which kinds of debugging dump have been requested. */
195 int rtl_dump_and_exit;
196 int flag_print_asm_name;
197 enum graph_dump_types graph_dump_format;
199 /* Name for output file of assembly code, specified with -o. */
201 const char *asm_file_name;
203 /* Nonzero means do optimizations. -O.
204 Particular numeric values stand for particular amounts of optimization;
205 thus, -O2 stores 2 here. However, the optimizations beyond the basic
206 ones are not controlled directly by this variable. Instead, they are
207 controlled by individual `flag_...' variables that are defaulted
208 based on this variable. */
212 /* Nonzero means optimize for size. -Os.
213 The only valid values are zero and nonzero. When optimize_size is
214 nonzero, optimize defaults to 2, but certain individual code
215 bloating optimizations are disabled. */
217 int optimize_size = 0;
219 /* The FUNCTION_DECL for the function currently being compiled,
220 or 0 if between functions. */
221 tree current_function_decl;
223 /* Set to the FUNC_BEGIN label of the current function, or NULL
225 const char * current_function_func_begin_label;
227 /* Temporarily suppress certain warnings.
228 This is set while reading code from a system header file. */
230 int in_system_header = 0;
232 /* Nonzero means to collect statistics which might be expensive
233 and to print them when we are done. */
234 int flag_detailed_statistics = 0;
236 /* A random sequence of characters, unless overridden by user. */
237 const char *flag_random_seed;
239 /* A local time stamp derived from the time of compilation. It will be
240 zero if the system cannot provide a time. It will be -1u, if the
241 user has specified a particular random seed. */
246 /* Nonzero means `char' should be signed. */
248 int flag_signed_char;
250 /* Nonzero means give an enum type only as many bytes as it needs. A value
251 of 2 means it has not yet been initialized. */
253 int flag_short_enums;
255 /* Nonzero if structures and unions should be returned in memory.
257 This should only be defined if compatibility with another compiler or
258 with an ABI is needed, because it results in slower code. */
260 #ifndef DEFAULT_PCC_STRUCT_RETURN
261 #define DEFAULT_PCC_STRUCT_RETURN 1
264 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
266 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
268 /* 0 means straightforward implementation of complex divide acceptable.
269 1 means wide ranges of inputs must work for complex divide.
270 2 means C99-like requirements for complex multiply and divide. */
272 int flag_complex_method = 1;
274 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
275 not just because the tree inliner turned us off. */
277 int flag_really_no_inline = 2;
279 /* Nonzero means we should be saving declaration info into a .X file. */
281 int flag_gen_aux_info = 0;
283 /* Specified name of aux-info file. */
285 const char *aux_info_file_name;
287 /* Nonzero if we are compiling code for a shared library, zero for
292 /* Generate code for GNU or NeXT Objective-C runtime environment. */
294 #ifdef NEXT_OBJC_RUNTIME
295 int flag_next_runtime = 1;
297 int flag_next_runtime = 0;
300 /* Set to the default thread-local storage (tls) model to use. */
302 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
304 /* Nonzero means change certain warnings into errors.
305 Usually these are warnings about failure to conform to some standard. */
307 int flag_pedantic_errors = 0;
309 /* -dA causes debug commentary information to be produced in
310 the generated assembly code (to make it more readable). This option
311 is generally only of use to those who actually need to read the
312 generated assembly code (perhaps while debugging the compiler itself).
313 Currently, this switch is only used by dwarfout.c; however, it is intended
314 to be a catchall for printing debug information in the assembler file. */
316 int flag_debug_asm = 0;
318 /* -dP causes the rtl to be emitted as a comment in assembly. */
320 int flag_dump_rtl_in_asm = 0;
322 /* When non-NULL, indicates that whenever space is allocated on the
323 stack, the resulting stack pointer must not pass this
324 address---that is, for stacks that grow downward, the stack pointer
325 must always be greater than or equal to this address; for stacks
326 that grow upward, the stack pointer must be less than this address.
327 At present, the rtx may be either a REG or a SYMBOL_REF, although
328 the support provided depends on the backend. */
331 /* If one, renumber instruction UIDs to reduce the number of
332 unused UIDs if there are a lot of instructions. If greater than
333 one, unconditionally renumber instruction UIDs. */
334 int flag_renumber_insns = 1;
336 /* Nonzero if we should track variables. When
337 flag_var_tracking == AUTODETECT_VALUE it will be set according
338 to optimize, debug_info_level and debug_hooks in process_options (). */
339 int flag_var_tracking = AUTODETECT_VALUE;
341 /* True if the user has tagged the function with the 'section'
344 bool user_defined_section_attribute = false;
346 /* Values of the -falign-* flags: how much to align labels in code.
347 0 means `use default', 1 means `don't align'.
348 For each variable, there is an _log variant which is the power
349 of two not less than the variable, for .align output. */
352 int align_loops_max_skip;
354 int align_jumps_max_skip;
355 int align_labels_log;
356 int align_labels_max_skip;
357 int align_functions_log;
359 /* Like align_functions_log above, but used by front-ends to force the
360 minimum function alignment. Zero means no alignment is forced. */
361 int force_align_functions_log;
365 const char *const string;
369 lang_independent_options;
371 /* Nonzero if subexpressions must be evaluated from left-to-right. */
372 int flag_evaluation_order = 0;
374 /* The user symbol prefix after having resolved same. */
375 const char *user_label_prefix;
377 static const param_info lang_independent_params[] = {
378 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
379 { OPTION, DEFAULT, MIN, MAX, HELP },
380 #include "params.def"
382 { NULL, 0, 0, 0, NULL }
385 /* Output files for assembler code (real compiler output)
386 and debugging dumps. */
390 FILE *dump_file = NULL;
391 const char *dump_file_name;
393 /* The current working directory of a translation. It's generally the
394 directory from which compilation was initiated, but a preprocessed
395 file may specify the original directory in which it was
398 static const char *src_pwd;
400 /* Initialize src_pwd with the given string, and return true. If it
401 was already initialized, return false. As a special case, it may
402 be called with a NULL argument to test whether src_pwd has NOT been
406 set_src_pwd (const char *pwd)
410 if (strcmp (src_pwd, pwd) == 0)
416 src_pwd = xstrdup (pwd);
420 /* Return the directory from which the translation unit was initiated,
421 in case set_src_pwd() was not called before to assign it a
437 /* Called when the start of a function definition is parsed,
438 this function prints on stderr the name of the function. */
440 announce_function (tree decl)
444 if (rtl_dump_and_exit)
445 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
447 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
449 pp_needs_newline (global_dc->printer) = true;
450 diagnostic_set_last_function (global_dc);
454 /* Set up a default flag_random_seed and local_tick, unless the user
455 already specified one. */
460 if (!flag_random_seed)
462 unsigned HOST_WIDE_INT value;
463 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
465 /* Get some more or less random data. */
466 #ifdef HAVE_GETTIMEOFDAY
470 gettimeofday (&tv, NULL);
471 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
475 time_t now = time (NULL);
477 if (now != (time_t)-1)
478 local_tick = (unsigned) now;
481 value = local_tick ^ getpid ();
483 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
484 flag_random_seed = random_seed;
486 else if (!local_tick)
491 /* Decode the string P as an integral parameter.
492 If the string is indeed an integer return its numeric value else
493 issue an Invalid Option error for the option PNAME and return DEFVAL.
494 If PNAME is zero just return DEFVAL, do not call error. */
497 read_integral_parameter (const char *p, const char *pname, const int defval)
499 const char *endp = p;
512 error ("invalid option argument %qs", pname);
519 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
520 If X is 0, return -1. */
523 floor_log2 (unsigned HOST_WIDE_INT x)
531 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
533 if (HOST_BITS_PER_WIDE_INT > 64)
534 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
536 if (HOST_BITS_PER_WIDE_INT > 32)
537 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
539 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
541 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
543 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
545 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
547 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
554 /* Return the logarithm of X, base 2, considering X unsigned,
555 if X is a power of 2. Otherwise, returns -1. */
558 exact_log2 (unsigned HOST_WIDE_INT x)
563 return x ? CTZ_HWI (x) : -1;
565 return floor_log2 (x);
569 /* Handler for fatal signals, such as SIGSEGV. These are transformed
570 into ICE messages, which is much more user friendly. In case the
571 error printer crashes, reset the signal to prevent infinite recursion. */
574 crash_signal (int signo)
576 signal (signo, SIG_DFL);
578 /* If we crashed while processing an ASM statement, then be a little more
579 graceful. It's most likely the user's fault. */
580 if (this_is_asm_operands)
582 output_operand_lossage ("unrecoverable error");
583 exit (FATAL_EXIT_CODE);
586 internal_error ("%s", strsignal (signo));
589 /* Arrange to dump core on error. (The regular error message is still
590 printed first, except in the case of abort().) */
593 setup_core_dumping (void)
596 signal (SIGABRT, SIG_DFL);
598 #if defined(HAVE_SETRLIMIT)
601 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
602 fatal_error ("getting core file size maximum limit: %m");
603 rlim.rlim_cur = rlim.rlim_max;
604 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
605 fatal_error ("setting core file size limit to maximum: %m");
608 diagnostic_abort_on_error (global_dc);
612 /* Strip off a legitimate source ending from the input string NAME of
613 length LEN. Rather than having to know the names used by all of
614 our front ends, we strip off an ending of a period followed by
615 up to five characters. (Java uses ".class".) */
618 strip_off_ending (char *name, int len)
621 for (i = 2; i < 6 && len > i; i++)
623 if (name[len - i] == '.')
625 name[len - i] = '\0';
631 /* Output a quoted string. */
634 output_quoted_string (FILE *asm_file, const char *string)
636 #ifdef OUTPUT_QUOTED_STRING
637 OUTPUT_QUOTED_STRING (asm_file, string);
641 putc ('\"', asm_file);
642 while ((c = *string++) != 0)
646 if (c == '\"' || c == '\\')
647 putc ('\\', asm_file);
651 fprintf (asm_file, "\\%03o", (unsigned char) c);
653 putc ('\"', asm_file);
657 /* Output a file name in the form wanted by System V. */
660 output_file_directive (FILE *asm_file, const char *input_name)
665 if (input_name == NULL)
666 input_name = "<stdin>";
668 len = strlen (input_name);
669 na = input_name + len;
671 /* NA gets INPUT_NAME sans directory names. */
672 while (na > input_name)
674 if (IS_DIR_SEPARATOR (na[-1]))
679 #ifdef ASM_OUTPUT_SOURCE_FILENAME
680 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
682 fprintf (asm_file, "\t.file\t");
683 output_quoted_string (asm_file, na);
684 fputc ('\n', asm_file);
688 /* Do any final processing required for the declarations in VEC, of
689 which there are LEN. We write out inline functions and variables
690 that have been deferred until this point, but which are required.
691 Returns nonzero if anything was put out. */
694 wrapup_global_declarations (tree *vec, int len)
699 int output_something = 0;
701 for (i = 0; i < len; i++)
705 /* We're not deferring this any longer. Assignment is
706 conditional to avoid needlessly dirtying PCH pages. */
707 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
708 && DECL_DEFER_OUTPUT (decl) != 0)
709 DECL_DEFER_OUTPUT (decl) = 0;
711 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
712 lang_hooks.finish_incomplete_decl (decl);
715 /* Now emit any global variables or functions that we have been
716 putting off. We need to loop in case one of the things emitted
717 here references another one which comes earlier in the list. */
721 for (i = 0; i < len; i++)
725 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
728 /* Don't write out static consts, unless we still need them.
730 We also keep static consts if not optimizing (for debugging),
731 unless the user specified -fno-keep-static-consts.
732 ??? They might be better written into the debug information.
733 This is possible when using DWARF.
735 A language processor that wants static constants to be always
736 written out (even if it is not used) is responsible for
737 calling rest_of_decl_compilation itself. E.g. the C front-end
738 calls rest_of_decl_compilation from finish_decl.
739 One motivation for this is that is conventional in some
740 environments to write things like:
741 static const char rcsid[] = "... version string ...";
742 intending to force the string to be in the executable.
744 A language processor that would prefer to have unneeded
745 static constants "optimized away" would just defer writing
746 them out until here. E.g. C++ does this, because static
747 constants are often defined in header files.
749 ??? A tempting alternative (for both C and C++) would be
750 to force a constant to be written if and only if it is
751 defined in a main file, as opposed to an include file. */
753 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
755 struct cgraph_varpool_node *node;
757 node = cgraph_varpool_node (decl);
761 else if (node->alias)
763 else if (!cgraph_global_info_ready
765 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
767 else if (node->needed)
769 else if (DECL_COMDAT (decl))
771 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
772 && (optimize || !flag_keep_static_consts
773 || DECL_ARTIFICIAL (decl)))
779 rest_of_decl_compilation (decl, 1, 1);
785 output_something = 1;
789 return output_something;
792 /* Issue appropriate warnings for the global declarations in VEC (of
793 which there are LEN). Output debugging information for them. */
796 check_global_declarations (tree *vec, int len)
801 for (i = 0; i < len; i++)
805 /* Do not emit debug information about variables that are in
806 static storage, but not defined. */
807 if (TREE_CODE (decl) == VAR_DECL
808 && TREE_STATIC (decl)
809 && !TREE_ASM_WRITTEN (decl))
810 DECL_IGNORED_P (decl) = 1;
812 /* Warn about any function
813 declared static but not defined.
814 We don't warn about variables,
815 because many programs have static variables
816 that exist only to get some text into the object file. */
817 if (TREE_CODE (decl) == FUNCTION_DECL
818 && DECL_INITIAL (decl) == 0
819 && DECL_EXTERNAL (decl)
820 && ! DECL_ARTIFICIAL (decl)
821 && ! TREE_NO_WARNING (decl)
822 && ! TREE_PUBLIC (decl)
823 && (warn_unused_function
824 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
826 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
827 pedwarn ("%q+F used but never defined", decl);
829 warning (0, "%q+F declared %<static%> but never defined",
831 /* This symbol is effectively an "extern" declaration now. */
832 TREE_PUBLIC (decl) = 1;
833 assemble_external (decl);
836 /* Warn about static fns or vars defined but not used. */
837 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
838 /* We don't warn about "static const" variables because the
839 "rcs_id" idiom uses that construction. */
840 || (warn_unused_variable
841 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
842 && ! DECL_IN_SYSTEM_HEADER (decl)
843 && ! TREE_USED (decl)
844 /* The TREE_USED bit for file-scope decls is kept in the identifier,
845 to handle multiple external decls in different scopes. */
846 && ! TREE_USED (DECL_NAME (decl))
847 && ! DECL_EXTERNAL (decl)
848 && ! TREE_PUBLIC (decl)
849 /* A volatile variable might be used in some non-obvious way. */
850 && ! TREE_THIS_VOLATILE (decl)
851 /* Global register variables must be declared to reserve them. */
852 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
853 /* Otherwise, ask the language. */
854 && lang_hooks.decls.warn_unused_global (decl))
855 warning (0, "%q+D defined but not used", decl);
857 /* Avoid confusing the debug information machinery when there are
859 if (errorcount == 0 && sorrycount == 0)
861 timevar_push (TV_SYMOUT);
862 (*debug_hooks->global_decl) (decl);
863 timevar_pop (TV_SYMOUT);
868 /* Warn about a use of an identifier which was marked deprecated. */
870 warn_deprecated_use (tree node)
872 if (node == 0 || !warn_deprecated_decl)
877 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
878 warning (OPT_Wdeprecated_declarations,
879 "%qs is deprecated (declared at %s:%d)",
880 IDENTIFIER_POINTER (DECL_NAME (node)),
881 xloc.file, xloc.line);
883 else if (TYPE_P (node))
885 const char *what = NULL;
886 tree decl = TYPE_STUB_DECL (node);
888 if (TYPE_NAME (node))
890 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
891 what = IDENTIFIER_POINTER (TYPE_NAME (node));
892 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
893 && DECL_NAME (TYPE_NAME (node)))
894 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
899 expanded_location xloc
900 = expand_location (DECL_SOURCE_LOCATION (decl));
902 warning (OPT_Wdeprecated_declarations,
903 "%qs is deprecated (declared at %s:%d)", what,
904 xloc.file, xloc.line);
906 warning (OPT_Wdeprecated_declarations,
907 "type is deprecated (declared at %s:%d)",
908 xloc.file, xloc.line);
913 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
915 warning (OPT_Wdeprecated_declarations, "type is deprecated");
920 /* Save the current INPUT_LOCATION on the top entry in the
921 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
922 INPUT_LOCATION accordingly. */
925 #ifdef USE_MAPPED_LOCATION
926 push_srcloc (location_t fline)
928 push_srcloc (const char *file, int line)
931 struct file_stack *fs;
933 fs = xmalloc (sizeof (struct file_stack));
934 fs->location = input_location;
935 fs->next = input_file_stack;
936 #ifdef USE_MAPPED_LOCATION
937 input_location = fline;
939 input_filename = file;
942 input_file_stack = fs;
943 input_file_stack_tick++;
946 /* Pop the top entry off the stack of presently open source files.
947 Restore the INPUT_LOCATION from the new topmost entry on the
953 struct file_stack *fs;
955 fs = input_file_stack;
956 input_location = fs->location;
957 input_file_stack = fs->next;
959 input_file_stack_tick++;
962 /* Compile an entire translation unit. Write a file of assembly
963 output and various debugging dumps. */
968 /* Initialize yet another pass. */
971 init_final (main_input_filename);
972 coverage_init (aux_base_name);
974 timevar_push (TV_PARSE);
976 /* Call the parser, which parses the entire file (calling
977 rest_of_compilation for each function). */
978 lang_hooks.parse_file (set_yydebug);
980 /* In case there were missing block closers,
981 get us back to the global binding level. */
982 lang_hooks.clear_binding_stack ();
984 /* Compilation is now finished except for writing
985 what's left of the symbol table output. */
986 timevar_pop (TV_PARSE);
988 if (flag_syntax_only)
991 lang_hooks.decls.final_write_globals ();
992 cgraph_varpool_assemble_pending_decls ();
995 /* This must occur after the loop to output deferred functions.
996 Else the coverage initializer would not be emitted if all the
997 functions in this compilation unit were deferred. */
1000 /* Likewise for mudflap static object registrations. */
1002 mudflap_finish_file ();
1004 /* Write out any pending weak symbol declarations. */
1008 /* Do dbx symbols. */
1009 timevar_push (TV_SYMOUT);
1011 #ifdef DWARF2_UNWIND_INFO
1012 if (dwarf2out_do_frame ())
1013 dwarf2out_frame_finish ();
1016 (*debug_hooks->finish) (main_input_filename);
1017 timevar_pop (TV_SYMOUT);
1019 /* Output some stuff at end of file if nec. */
1021 dw2_output_indirect_constants ();
1023 /* Flush any pending external directives. cgraph did this for
1024 assemble_external calls from the front end, but the RTL
1025 expander can also generate them. */
1026 process_pending_assemble_externals ();
1028 /* Attach a special .ident directive to the end of the file to identify
1029 the version of GCC which compiled this code. The format of the .ident
1030 string is patterned after the ones produced by native SVR4 compilers. */
1033 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1034 IDENT_ASM_OP, version_string);
1037 /* This must be at the end. Some target ports emit end of file directives
1038 into the assembly file here, and hence we can not output anything to the
1039 assembly file after this point. */
1040 targetm.asm_out.file_end ();
1043 /* Parse a -d... command line switch. */
1046 decode_d_option (const char *arg)
1057 flag_print_asm_name = 1;
1060 flag_dump_rtl_in_asm = 1;
1061 flag_print_asm_name = 1;
1064 graph_dump_format = vcg;
1067 rtl_dump_and_exit = 1;
1072 case 'D': /* These are handled by the preprocessor. */
1076 setup_core_dumping();
1081 if (!enable_rtl_dump_file (c))
1082 warning (0, "unrecognized gcc debugging option: %c", c);
1087 /* Indexed by enum debug_info_type. */
1088 const char *const debug_type_names[] =
1090 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1093 /* Print version information to FILE.
1094 Each line begins with INDENT (for the case where FILE is the
1095 assembler output file). */
1098 print_version (FILE *file, const char *indent)
1100 static const char fmt1[] =
1102 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1104 N_("%s%s%s version %s (%s) compiled by CC.\n")
1107 static const char fmt2[] =
1108 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1110 #define __VERSION__ "[?]"
1113 file == stderr ? _(fmt1) : fmt1,
1114 indent, *indent != 0 ? " " : "",
1115 lang_hooks.name, version_string, TARGET_NAME,
1116 indent, __VERSION__);
1118 file == stderr ? _(fmt2) : fmt2,
1119 indent, *indent != 0 ? " " : "",
1120 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1123 /* Print an option value and return the adjusted position in the line.
1124 ??? We don't handle error returns from fprintf (disk full); presumably
1125 other code will catch a disk full though. */
1128 print_single_switch (FILE *file, int pos, int max,
1129 const char *indent, const char *sep, const char *term,
1130 const char *type, const char *name)
1132 /* The ultrix fprintf returns 0 on success, so compute the result we want
1133 here since we need it for the following test. */
1134 int len = strlen (sep) + strlen (type) + strlen (name);
1139 fprintf (file, "%s", term);
1144 fprintf (file, "%s", indent);
1145 pos = strlen (indent);
1147 fprintf (file, "%s%s%s", sep, type, name);
1152 /* Print active target switches to FILE.
1153 POS is the current cursor position and MAX is the size of a "line".
1154 Each line begins with INDENT and ends with TERM.
1155 Each switch is separated from the next by SEP. */
1158 print_switch_values (FILE *file, int pos, int max,
1159 const char *indent, const char *sep, const char *term)
1164 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1165 that it can be printed below. This helps reproducibility. */
1168 /* Print the options as passed. */
1169 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1170 _("options passed: "), "");
1172 for (p = &save_argv[1]; *p != NULL; p++)
1176 if (strcmp (*p, "-o") == 0)
1182 if (strcmp (*p, "-quiet") == 0)
1184 if (strcmp (*p, "-version") == 0)
1189 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1192 fprintf (file, "%s", term);
1194 /* Print the -f and -m options that have been enabled.
1195 We don't handle language specific options but printing argv
1198 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1199 _("options enabled: "), "");
1201 for (j = 0; j < cl_options_count; j++)
1202 if ((cl_options[j].flags & CL_REPORT)
1203 && option_enabled (j) > 0)
1204 pos = print_single_switch (file, pos, max, indent, sep, term,
1205 "", cl_options[j].opt_text);
1207 fprintf (file, "%s", term);
1210 /* Open assembly code output file. Do this even if -fsyntax-only is
1211 on, because then the driver will have provided the name of a
1212 temporary file or bit bucket for us. NAME is the file specified on
1213 the command line, possibly NULL. */
1215 init_asm_output (const char *name)
1217 if (name == NULL && asm_file_name == 0)
1218 asm_out_file = stdout;
1221 if (asm_file_name == 0)
1223 int len = strlen (dump_base_name);
1224 char *dumpname = xmalloc (len + 6);
1225 memcpy (dumpname, dump_base_name, len + 1);
1226 strip_off_ending (dumpname, len);
1227 strcat (dumpname, ".s");
1228 asm_file_name = dumpname;
1230 if (!strcmp (asm_file_name, "-"))
1231 asm_out_file = stdout;
1233 asm_out_file = fopen (asm_file_name, "w+b");
1234 if (asm_out_file == 0)
1235 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1238 if (!flag_syntax_only)
1240 targetm.asm_out.file_start ();
1242 #ifdef ASM_COMMENT_START
1243 if (flag_verbose_asm)
1245 /* Print the list of options in effect. */
1246 print_version (asm_out_file, ASM_COMMENT_START);
1247 print_switch_values (asm_out_file, 0, MAX_LINE,
1248 ASM_COMMENT_START, " ", "\n");
1249 /* Add a blank line here so it appears in assembler output but not
1251 fprintf (asm_out_file, "\n");
1257 /* Return true if the state of option OPTION should be stored in PCH files
1258 and checked by default_pch_valid_p. Store the option's current state
1262 option_affects_pch_p (int option, struct cl_option_state *state)
1264 if ((cl_options[option].flags & CL_TARGET) == 0)
1266 if (cl_options[option].flag_var == &target_flags)
1267 if (targetm.check_pch_target_flags)
1269 return get_option_state (option, state);
1272 /* Default version of get_pch_validity.
1273 By default, every flag difference is fatal; that will be mostly right for
1274 most targets, but completely right for very few. */
1277 default_get_pch_validity (size_t *len)
1279 struct cl_option_state state;
1284 if (targetm.check_pch_target_flags)
1285 *len += sizeof (target_flags);
1286 for (i = 0; i < cl_options_count; i++)
1287 if (option_affects_pch_p (i, &state))
1290 result = r = xmalloc (*len);
1294 if (targetm.check_pch_target_flags)
1296 memcpy (r, &target_flags, sizeof (target_flags));
1297 r += sizeof (target_flags);
1300 for (i = 0; i < cl_options_count; i++)
1301 if (option_affects_pch_p (i, &state))
1303 memcpy (r, state.data, state.size);
1310 /* Return a message which says that a PCH file was created with a different
1311 setting of OPTION. */
1314 pch_option_mismatch (const char *option)
1318 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1320 return _("out of memory");
1324 /* Default version of pch_valid_p. */
1327 default_pch_valid_p (const void *data_p, size_t len)
1329 struct cl_option_state state;
1330 const char *data = (const char *)data_p;
1333 /* -fpic and -fpie also usually make a PCH invalid. */
1334 if (data[0] != flag_pic)
1335 return _("created and used with different settings of -fpic");
1336 if (data[1] != flag_pie)
1337 return _("created and used with different settings of -fpie");
1340 /* Check target_flags. */
1341 if (targetm.check_pch_target_flags)
1346 memcpy (&tf, data, sizeof (target_flags));
1347 data += sizeof (target_flags);
1348 len -= sizeof (target_flags);
1349 r = targetm.check_pch_target_flags (tf);
1354 for (i = 0; i < cl_options_count; i++)
1355 if (option_affects_pch_p (i, &state))
1357 if (memcmp (data, state.data, state.size) != 0)
1358 return pch_option_mismatch (cl_options[i].opt_text);
1366 /* Default tree printer. Handles declarations only. */
1368 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1369 int precision, bool wide, bool set_locus, bool hash)
1373 /* FUTURE: %+x should set the locus. */
1374 if (precision != 0 || wide || hash)
1380 t = va_arg (*text->args_ptr, tree);
1381 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1382 t = DECL_DEBUG_EXPR (t);
1387 t = va_arg (*text->args_ptr, tree);
1394 if (set_locus && text->locus)
1395 *text->locus = DECL_SOURCE_LOCATION (t);
1399 const char *n = DECL_NAME (t)
1400 ? lang_hooks.decl_printable_name (t, 2)
1405 dump_generic_node (pp, t, 0, 0, 0);
1410 /* Initialization of the front end environment, before command line
1411 options are parsed. Signal handlers, internationalization etc.
1412 ARGV0 is main's argv[0]. */
1414 general_init (const char *argv0)
1418 p = argv0 + strlen (argv0);
1419 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1423 xmalloc_set_program_name (progname);
1427 /* Unlock the stdio streams. */
1428 unlock_std_streams ();
1430 gcc_init_libintl ();
1432 /* Initialize the diagnostics reporting machinery, so option parsing
1433 can give warnings and errors. */
1434 diagnostic_initialize (global_dc);
1435 /* Set a default printer. Language specific initializations will
1436 override it later. */
1437 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1439 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1441 signal (SIGSEGV, crash_signal);
1444 signal (SIGILL, crash_signal);
1447 signal (SIGBUS, crash_signal);
1450 signal (SIGABRT, crash_signal);
1452 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1453 signal (SIGIOT, crash_signal);
1456 signal (SIGFPE, crash_signal);
1459 /* Other host-specific signal setup. */
1460 (*host_hooks.extra_signals)();
1462 /* Initialize the garbage-collector, string pools and tree type hash
1466 linemap_init (&line_table);
1469 /* Initialize register usage now so switches may override. */
1472 /* Register the language-independent parameters. */
1473 add_params (lang_independent_params, LAST_PARAM);
1475 /* This must be done after add_params but before argument processing. */
1476 init_ggc_heuristics();
1477 init_optimization_passes ();
1480 /* Process the options that have been parsed. */
1482 process_options (void)
1484 /* Allow the front end to perform consistency checks and do further
1485 initialization based on the command line options. This hook also
1486 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1487 so we can correctly initialize debug output. */
1488 no_backend = lang_hooks.post_options (&main_input_filename);
1489 #ifndef USE_MAPPED_LOCATION
1490 input_filename = main_input_filename;
1493 #ifdef OVERRIDE_OPTIONS
1494 /* Some machines may reject certain combinations of options. */
1498 if (flag_short_enums == 2)
1499 flag_short_enums = targetm.default_short_enums ();
1501 /* Set aux_base_name if not already set. */
1504 else if (main_input_filename)
1506 char *name = xstrdup (lbasename (main_input_filename));
1508 strip_off_ending (name, strlen (name));
1509 aux_base_name = name;
1512 aux_base_name = "gccaux";
1514 /* Set up the align_*_log variables, defaulting them to 1 if they
1515 were still unset. */
1516 if (align_loops <= 0) align_loops = 1;
1517 if (align_loops_max_skip > align_loops || !align_loops)
1518 align_loops_max_skip = align_loops - 1;
1519 align_loops_log = floor_log2 (align_loops * 2 - 1);
1520 if (align_jumps <= 0) align_jumps = 1;
1521 if (align_jumps_max_skip > align_jumps || !align_jumps)
1522 align_jumps_max_skip = align_jumps - 1;
1523 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1524 if (align_labels <= 0) align_labels = 1;
1525 align_labels_log = floor_log2 (align_labels * 2 - 1);
1526 if (align_labels_max_skip > align_labels || !align_labels)
1527 align_labels_max_skip = align_labels - 1;
1528 if (align_functions <= 0) align_functions = 1;
1529 align_functions_log = floor_log2 (align_functions * 2 - 1);
1531 /* Unrolling all loops implies that standard loop unrolling must also
1533 if (flag_unroll_all_loops)
1534 flag_unroll_loops = 1;
1536 /* The loop unrolling code assumes that cse will be run after loop.
1537 web and rename-registers also help when run after loop unrolling. */
1539 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1540 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1541 if (flag_web == AUTODETECT_VALUE)
1542 flag_web = flag_unroll_loops || flag_peel_loops;
1543 if (flag_rename_registers == AUTODETECT_VALUE)
1544 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1546 /* If explicitly asked to run new loop optimizer, switch off the old
1548 if (flag_loop_optimize2)
1549 flag_loop_optimize = 0;
1551 /* Enable new loop optimizer pass if any of its optimizations is called. */
1552 if (flag_move_loop_invariants
1553 || flag_unswitch_loops
1555 || flag_unroll_loops
1556 || flag_branch_on_count_reg)
1557 flag_loop_optimize2 = 1;
1559 if (flag_non_call_exceptions)
1560 flag_asynchronous_unwind_tables = 1;
1561 if (flag_asynchronous_unwind_tables)
1562 flag_unwind_tables = 1;
1564 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1566 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1567 flag_unit_at_a_time = 0;
1569 if (flag_value_profile_transformations)
1570 flag_profile_values = 1;
1572 /* Speculative prefetching implies the value profiling. We also switch off
1573 the prefetching in the loop optimizer, so that we do not emit double
1574 prefetches. TODO -- we should teach these two to cooperate; the loop
1575 based prefetching may sometimes do a better job, especially in connection
1576 with reuse analysis. */
1577 if (flag_speculative_prefetching)
1579 flag_profile_values = 1;
1580 flag_prefetch_loop_arrays = 0;
1583 /* Warn about options that are not supported on this machine. */
1584 #ifndef INSN_SCHEDULING
1585 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1586 warning (0, "instruction scheduling not supported on this target machine");
1589 if (flag_delayed_branch)
1590 warning (0, "this target machine does not have delayed branches");
1593 user_label_prefix = USER_LABEL_PREFIX;
1594 if (flag_leading_underscore != -1)
1596 /* If the default prefix is more complicated than "" or "_",
1597 issue a warning and ignore this option. */
1598 if (user_label_prefix[0] == 0 ||
1599 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1601 user_label_prefix = flag_leading_underscore ? "_" : "";
1604 warning (0, "-f%sleading-underscore not supported on this target machine",
1605 flag_leading_underscore ? "" : "no-");
1608 /* If we are in verbose mode, write out the version and maybe all the
1609 option flags in use. */
1612 print_version (stderr, "");
1614 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
1617 if (flag_syntax_only)
1619 write_symbols = NO_DEBUG;
1623 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1625 if (debug_info_level == DINFO_LEVEL_NONE)
1626 write_symbols = NO_DEBUG;
1628 /* Now we know write_symbols, set up the debug hooks based on it.
1629 By default we do nothing for debug output. */
1630 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1631 default_debug_hooks = &do_nothing_debug_hooks;
1632 #if defined(DBX_DEBUGGING_INFO)
1633 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1634 default_debug_hooks = &dbx_debug_hooks;
1636 #if defined(XCOFF_DEBUGGING_INFO)
1637 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1638 default_debug_hooks = &xcoff_debug_hooks;
1640 #ifdef SDB_DEBUGGING_INFO
1641 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1642 default_debug_hooks = &sdb_debug_hooks;
1644 #ifdef DWARF2_DEBUGGING_INFO
1645 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1646 default_debug_hooks = &dwarf2_debug_hooks;
1648 #ifdef VMS_DEBUGGING_INFO
1649 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1650 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1651 default_debug_hooks = &vmsdbg_debug_hooks;
1654 debug_hooks = &do_nothing_debug_hooks;
1655 if (write_symbols == NO_DEBUG)
1657 #if defined(DBX_DEBUGGING_INFO)
1658 else if (write_symbols == DBX_DEBUG)
1659 debug_hooks = &dbx_debug_hooks;
1661 #if defined(XCOFF_DEBUGGING_INFO)
1662 else if (write_symbols == XCOFF_DEBUG)
1663 debug_hooks = &xcoff_debug_hooks;
1665 #ifdef SDB_DEBUGGING_INFO
1666 else if (write_symbols == SDB_DEBUG)
1667 debug_hooks = &sdb_debug_hooks;
1669 #ifdef DWARF2_DEBUGGING_INFO
1670 else if (write_symbols == DWARF2_DEBUG)
1671 debug_hooks = &dwarf2_debug_hooks;
1673 #ifdef VMS_DEBUGGING_INFO
1674 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1675 debug_hooks = &vmsdbg_debug_hooks;
1678 error ("target system does not support the \"%s\" debug format",
1679 debug_type_names[write_symbols]);
1681 /* Now we know which debug output will be used so we can set
1682 flag_var_tracking, flag_rename_registers if the user has
1683 not specified them. */
1684 if (debug_info_level < DINFO_LEVEL_NORMAL
1685 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1687 if (flag_var_tracking == 1)
1689 if (debug_info_level < DINFO_LEVEL_NORMAL)
1690 warning (0, "variable tracking requested, but useless unless "
1691 "producing debug info");
1693 warning (0, "variable tracking requested, but not supported "
1694 "by this debug format");
1696 flag_var_tracking = 0;
1699 if (flag_rename_registers == AUTODETECT_VALUE)
1700 flag_rename_registers = default_debug_hooks->var_location
1701 != do_nothing_debug_hooks.var_location;
1703 if (flag_var_tracking == AUTODETECT_VALUE)
1704 flag_var_tracking = optimize >= 1;
1706 /* If auxiliary info generation is desired, open the output file.
1707 This goes in the same directory as the source file--unlike
1708 all the other output files. */
1709 if (flag_gen_aux_info)
1711 aux_info_file = fopen (aux_info_file_name, "w");
1712 if (aux_info_file == 0)
1713 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1716 if (! targetm.have_named_sections)
1718 if (flag_function_sections)
1720 warning (0, "-ffunction-sections not supported for this target");
1721 flag_function_sections = 0;
1723 if (flag_data_sections)
1725 warning (0, "-fdata-sections not supported for this target");
1726 flag_data_sections = 0;
1730 if (flag_function_sections && profile_flag)
1732 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1733 flag_function_sections = 0;
1736 #ifndef HAVE_prefetch
1737 if (flag_prefetch_loop_arrays)
1739 warning (0, "-fprefetch-loop-arrays not supported for this target");
1740 flag_prefetch_loop_arrays = 0;
1742 if (flag_speculative_prefetching)
1744 if (flag_speculative_prefetching_set)
1745 warning (0, "-fspeculative-prefetching not supported for this target");
1746 flag_speculative_prefetching = 0;
1749 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1751 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1752 flag_prefetch_loop_arrays = 0;
1754 if (flag_speculative_prefetching && !HAVE_prefetch)
1756 if (flag_speculative_prefetching_set)
1757 warning (0, "-fspeculative-prefetching not supported for this target (try -march switches)");
1758 flag_speculative_prefetching = 0;
1762 /* This combination of options isn't handled for i386 targets and doesn't
1763 make much sense anyway, so don't allow it. */
1764 if (flag_prefetch_loop_arrays && optimize_size)
1766 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1767 flag_prefetch_loop_arrays = 0;
1770 #ifndef OBJECT_FORMAT_ELF
1771 if (flag_function_sections && write_symbols != NO_DEBUG)
1772 warning (0, "-ffunction-sections may affect debugging on some targets");
1775 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1776 if (flag_signaling_nans)
1777 flag_trapping_math = 1;
1779 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1780 if (flag_cx_limited_range)
1781 flag_complex_method = 0;
1783 /* Targets must be able to place spill slots at lower addresses. If the
1784 target already uses a soft frame pointer, the transition is trivial. */
1785 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1787 warning (0, "-fstack-protector not supported for this target");
1788 flag_stack_protect = 0;
1790 if (!flag_stack_protect)
1791 warn_stack_protect = 0;
1794 /* Initialize the compiler back end. */
1798 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1799 || debug_info_level == DINFO_LEVEL_VERBOSE
1800 #ifdef VMS_DEBUGGING_INFO
1801 /* Enable line number info for traceback. */
1802 || debug_info_level > DINFO_LEVEL_NONE
1804 || flag_test_coverage);
1808 init_fake_stack_mems ();
1812 init_varasm_once ();
1814 /* The following initialization functions need to generate rtl, so
1815 provide a dummy function context for them. */
1816 init_dummy_function_start ();
1818 if (flag_caller_saves)
1819 init_caller_save ();
1820 expand_dummy_function_end ();
1823 /* Language-dependent initialization. Returns nonzero on success. */
1825 lang_dependent_init (const char *name)
1827 location_t save_loc = input_location;
1828 if (dump_base_name == 0)
1829 dump_base_name = name && name[0] ? name : "gccdump";
1831 /* Other front-end initialization. */
1832 #ifdef USE_MAPPED_LOCATION
1833 input_location = BUILTINS_LOCATION;
1835 input_filename = "<built-in>";
1838 if (lang_hooks.init () == 0)
1840 input_location = save_loc;
1842 init_asm_output (name);
1844 /* These create various _DECL nodes, so need to be called after the
1845 front end is initialized. */
1849 /* The following initialization functions need to generate rtl, so
1850 provide a dummy function context for them. */
1851 init_dummy_function_start ();
1853 expand_dummy_function_end ();
1855 /* If dbx symbol table desired, initialize writing it and output the
1856 predefined types. */
1857 timevar_push (TV_SYMOUT);
1859 #ifdef DWARF2_UNWIND_INFO
1860 if (dwarf2out_do_frame ())
1861 dwarf2out_frame_init ();
1864 /* Now we have the correct original filename, we can initialize
1866 (*debug_hooks->init) (name);
1868 timevar_pop (TV_SYMOUT);
1873 /* Clean up: close opened files, etc. */
1878 /* Close the dump files. */
1879 if (flag_gen_aux_info)
1881 fclose (aux_info_file);
1883 unlink (aux_info_file_name);
1886 /* Close non-debugging input and output files. Take special care to note
1887 whether fclose returns an error, since the pages might still be on the
1888 buffer chain while the file is open. */
1892 if (ferror (asm_out_file) != 0)
1893 fatal_error ("error writing to %s: %m", asm_file_name);
1894 if (fclose (asm_out_file) != 0)
1895 fatal_error ("error closing %s: %m", asm_file_name);
1898 finish_optimization_passes ();
1902 ggc_print_statistics ();
1903 stringpool_statistics ();
1904 dump_tree_statistics ();
1905 dump_rtx_statistics ();
1906 dump_varray_statistics ();
1907 dump_alloc_pool_statistics ();
1908 dump_ggc_loc_statistics ();
1911 /* Free up memory for the benefit of leak detectors. */
1914 /* Language-specific end of compilation actions. */
1915 lang_hooks.finish ();
1918 /* Initialize the compiler, and compile the input file. */
1922 /* Initialize timing first. The C front ends read the main file in
1923 the post_options hook, and C++ does file timings. */
1924 if (time_report || !quiet_flag || flag_detailed_statistics)
1926 timevar_start (TV_TOTAL);
1930 /* Don't do any more if an error has already occurred. */
1933 /* This must be run always, because it is needed to compute the FP
1934 predefined macros, such as __LDBL_MAX__, for targets using non
1935 default FP formats. */
1936 init_adjust_machine_modes ();
1938 /* Set up the back-end if requested. */
1942 /* Language-dependent initialization. Returns true on success. */
1943 if (lang_dependent_init (main_input_filename))
1949 /* Stop timing and print the times. */
1950 timevar_stop (TV_TOTAL);
1951 timevar_print (stderr);
1954 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1955 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1956 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1958 It is not safe to call this function more than once. */
1961 toplev_main (unsigned int argc, const char **argv)
1965 /* Initialization of GCC's environment, and diagnostics. */
1966 general_init (argv[0]);
1968 /* Parse the options and do minimal processing; basically just
1969 enough to default flags appropriately. */
1970 decode_options (argc, argv);
1974 /* Exit early if we can (e.g. -help). */
1975 if (!exit_after_options)
1978 if (errorcount || sorrycount)
1979 return (FATAL_EXIT_CODE);
1981 return (SUCCESS_EXIT_CODE);