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_FLAG_VAR_TRACKING 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_FLAG_VAR_TRACKING it will be set according
338 to optimize, debug_info_level and debug_hooks in process_options (). */
339 int flag_var_tracking = AUTODETECT_FLAG_VAR_TRACKING;
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 verbatim ("%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
447 verbatim (" %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 (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 /* Now emit any global variables or functions that we have been
715 putting off. We need to loop in case one of the things emitted
716 here references another one which comes earlier in the list. */
720 for (i = 0; i < len; i++)
724 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
727 /* Don't write out static consts, unless we still need them.
729 We also keep static consts if not optimizing (for debugging),
730 unless the user specified -fno-keep-static-consts.
731 ??? They might be better written into the debug information.
732 This is possible when using DWARF.
734 A language processor that wants static constants to be always
735 written out (even if it is not used) is responsible for
736 calling rest_of_decl_compilation itself. E.g. the C front-end
737 calls rest_of_decl_compilation from finish_decl.
738 One motivation for this is that is conventional in some
739 environments to write things like:
740 static const char rcsid[] = "... version string ...";
741 intending to force the string to be in the executable.
743 A language processor that would prefer to have unneeded
744 static constants "optimized away" would just defer writing
745 them out until here. E.g. C++ does this, because static
746 constants are often defined in header files.
748 ??? A tempting alternative (for both C and C++) would be
749 to force a constant to be written if and only if it is
750 defined in a main file, as opposed to an include file. */
752 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
754 struct cgraph_varpool_node *node;
756 node = cgraph_varpool_node (decl);
760 else if (node->alias)
762 else if (!cgraph_global_info_ready
764 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
766 else if (node->needed)
768 else if (DECL_COMDAT (decl))
770 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
771 && (optimize || !flag_keep_static_consts
772 || DECL_ARTIFICIAL (decl)))
778 rest_of_decl_compilation (decl, 1, 1);
784 output_something = 1;
788 return output_something;
791 /* Issue appropriate warnings for the global declarations in VEC (of
792 which there are LEN). Output debugging information for them. */
795 check_global_declarations (tree *vec, int len)
800 for (i = 0; i < len; i++)
804 /* Do not emit debug information about variables that are in
805 static storage, but not defined. */
806 if (TREE_CODE (decl) == VAR_DECL
807 && TREE_STATIC (decl)
808 && !TREE_ASM_WRITTEN (decl))
809 DECL_IGNORED_P (decl) = 1;
811 /* Warn about any function
812 declared static but not defined.
813 We don't warn about variables,
814 because many programs have static variables
815 that exist only to get some text into the object file. */
816 if (TREE_CODE (decl) == FUNCTION_DECL
817 && DECL_INITIAL (decl) == 0
818 && DECL_EXTERNAL (decl)
819 && ! DECL_ARTIFICIAL (decl)
820 && ! TREE_NO_WARNING (decl)
821 && ! TREE_PUBLIC (decl)
822 && (warn_unused_function
823 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
825 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
826 pedwarn ("%J%qF used but never defined", decl, decl);
828 warning (0, "%J%qF declared %<static%> but never defined",
830 /* This symbol is effectively an "extern" declaration now. */
831 TREE_PUBLIC (decl) = 1;
832 assemble_external (decl);
835 /* Warn about static fns or vars defined but not used. */
836 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
837 /* We don't warn about "static const" variables because the
838 "rcs_id" idiom uses that construction. */
839 || (warn_unused_variable
840 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
841 && ! DECL_IN_SYSTEM_HEADER (decl)
842 && ! TREE_USED (decl)
843 /* The TREE_USED bit for file-scope decls is kept in the identifier,
844 to handle multiple external decls in different scopes. */
845 && ! TREE_USED (DECL_NAME (decl))
846 && ! DECL_EXTERNAL (decl)
847 && ! TREE_PUBLIC (decl)
848 /* A volatile variable might be used in some non-obvious way. */
849 && ! TREE_THIS_VOLATILE (decl)
850 /* Global register variables must be declared to reserve them. */
851 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
852 /* Otherwise, ask the language. */
853 && lang_hooks.decls.warn_unused_global (decl))
854 warning (0, "%J%qD defined but not used", decl, decl);
856 /* Avoid confusing the debug information machinery when there are
858 if (errorcount == 0 && sorrycount == 0)
860 timevar_push (TV_SYMOUT);
861 (*debug_hooks->global_decl) (decl);
862 timevar_pop (TV_SYMOUT);
867 /* Warn about a use of an identifier which was marked deprecated. */
869 warn_deprecated_use (tree node)
871 if (node == 0 || !warn_deprecated_decl)
876 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
877 warning (0, "%qs is deprecated (declared at %s:%d)",
878 IDENTIFIER_POINTER (DECL_NAME (node)),
879 xloc.file, xloc.line);
881 else if (TYPE_P (node))
883 const char *what = NULL;
884 tree decl = TYPE_STUB_DECL (node);
886 if (TYPE_NAME (node))
888 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
889 what = IDENTIFIER_POINTER (TYPE_NAME (node));
890 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
891 && DECL_NAME (TYPE_NAME (node)))
892 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
897 expanded_location xloc
898 = expand_location (DECL_SOURCE_LOCATION (decl));
900 warning (0, "%qs is deprecated (declared at %s:%d)", what,
901 xloc.file, xloc.line);
903 warning (0, "type is deprecated (declared at %s:%d)",
904 xloc.file, xloc.line);
909 warning (0, "%qs is deprecated", what);
911 warning (0, "type is deprecated");
916 /* Save the current INPUT_LOCATION on the top entry in the
917 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
918 INPUT_LOCATION accordingly. */
921 #ifdef USE_MAPPED_LOCATION
922 push_srcloc (location_t fline)
924 push_srcloc (const char *file, int line)
927 struct file_stack *fs;
929 fs = xmalloc (sizeof (struct file_stack));
930 fs->location = input_location;
931 fs->next = input_file_stack;
932 #ifdef USE_MAPPED_LOCATION
933 input_location = fline;
935 input_filename = file;
938 input_file_stack = fs;
939 input_file_stack_tick++;
942 /* Pop the top entry off the stack of presently open source files.
943 Restore the INPUT_LOCATION from the new topmost entry on the
949 struct file_stack *fs;
951 fs = input_file_stack;
952 input_location = fs->location;
953 input_file_stack = fs->next;
955 input_file_stack_tick++;
958 /* Compile an entire translation unit. Write a file of assembly
959 output and various debugging dumps. */
964 /* Initialize yet another pass. */
967 init_final (main_input_filename);
968 coverage_init (aux_base_name);
970 timevar_push (TV_PARSE);
972 /* Call the parser, which parses the entire file (calling
973 rest_of_compilation for each function). */
974 lang_hooks.parse_file (set_yydebug);
976 /* In case there were missing block closers,
977 get us back to the global binding level. */
978 lang_hooks.clear_binding_stack ();
980 /* Compilation is now finished except for writing
981 what's left of the symbol table output. */
982 timevar_pop (TV_PARSE);
984 if (flag_syntax_only)
987 lang_hooks.decls.final_write_globals ();
988 cgraph_varpool_assemble_pending_decls ();
991 /* This must occur after the loop to output deferred functions.
992 Else the coverage initializer would not be emitted if all the
993 functions in this compilation unit were deferred. */
996 /* Likewise for mudflap static object registrations. */
998 mudflap_finish_file ();
1000 /* Write out any pending weak symbol declarations. */
1004 /* Do dbx symbols. */
1005 timevar_push (TV_SYMOUT);
1007 #ifdef DWARF2_UNWIND_INFO
1008 if (dwarf2out_do_frame ())
1009 dwarf2out_frame_finish ();
1012 (*debug_hooks->finish) (main_input_filename);
1013 timevar_pop (TV_SYMOUT);
1015 /* Output some stuff at end of file if nec. */
1017 dw2_output_indirect_constants ();
1019 /* Flush any pending external directives. cgraph did this for
1020 assemble_external calls from the front end, but the RTL
1021 expander can also generate them. */
1022 process_pending_assemble_externals ();
1024 /* Attach a special .ident directive to the end of the file to identify
1025 the version of GCC which compiled this code. The format of the .ident
1026 string is patterned after the ones produced by native SVR4 compilers. */
1029 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1030 IDENT_ASM_OP, version_string);
1033 /* This must be at the end. Some target ports emit end of file directives
1034 into the assembly file here, and hence we can not output anything to the
1035 assembly file after this point. */
1036 targetm.asm_out.file_end ();
1039 /* Parse a -d... command line switch. */
1042 decode_d_option (const char *arg)
1053 flag_print_asm_name = 1;
1056 flag_dump_rtl_in_asm = 1;
1057 flag_print_asm_name = 1;
1060 graph_dump_format = vcg;
1063 rtl_dump_and_exit = 1;
1068 case 'D': /* These are handled by the preprocessor. */
1072 setup_core_dumping();
1077 if (!enable_rtl_dump_file (c))
1078 warning (0, "unrecognized gcc debugging option: %c", c);
1083 /* Indexed by enum debug_info_type. */
1084 const char *const debug_type_names[] =
1086 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1089 /* Print version information to FILE.
1090 Each line begins with INDENT (for the case where FILE is the
1091 assembler output file). */
1094 print_version (FILE *file, const char *indent)
1097 #define __VERSION__ "[?]"
1101 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1103 "%s%s%s version %s (%s) compiled by CC.\n"
1105 , indent, *indent != 0 ? " " : "",
1106 lang_hooks.name, version_string, TARGET_NAME,
1107 indent, __VERSION__);
1108 fnotice (file, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1109 indent, *indent != 0 ? " " : "",
1110 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1113 /* Print an option value and return the adjusted position in the line.
1114 ??? We don't handle error returns from fprintf (disk full); presumably
1115 other code will catch a disk full though. */
1118 print_single_switch (FILE *file, int pos, int max,
1119 const char *indent, const char *sep, const char *term,
1120 const char *type, const char *name)
1122 /* The ultrix fprintf returns 0 on success, so compute the result we want
1123 here since we need it for the following test. */
1124 int len = strlen (sep) + strlen (type) + strlen (name);
1129 fprintf (file, "%s", term);
1134 fprintf (file, "%s", indent);
1135 pos = strlen (indent);
1137 fprintf (file, "%s%s%s", sep, type, name);
1142 /* Print active target switches to FILE.
1143 POS is the current cursor position and MAX is the size of a "line".
1144 Each line begins with INDENT and ends with TERM.
1145 Each switch is separated from the next by SEP. */
1148 print_switch_values (FILE *file, int pos, int max,
1149 const char *indent, const char *sep, const char *term)
1154 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1155 that it can be printed below. This helps reproducibility. */
1158 /* Print the options as passed. */
1159 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1160 _("options passed: "), "");
1162 for (p = &save_argv[1]; *p != NULL; p++)
1166 if (strcmp (*p, "-o") == 0)
1172 if (strcmp (*p, "-quiet") == 0)
1174 if (strcmp (*p, "-version") == 0)
1179 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1182 fprintf (file, "%s", term);
1184 /* Print the -f and -m options that have been enabled.
1185 We don't handle language specific options but printing argv
1188 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1189 _("options enabled: "), "");
1191 for (j = 0; j < cl_options_count; j++)
1192 if ((cl_options[j].flags & CL_REPORT)
1193 && option_enabled (j) > 0)
1194 pos = print_single_switch (file, pos, max, indent, sep, term,
1195 "", cl_options[j].opt_text);
1197 fprintf (file, "%s", term);
1200 /* Open assembly code output file. Do this even if -fsyntax-only is
1201 on, because then the driver will have provided the name of a
1202 temporary file or bit bucket for us. NAME is the file specified on
1203 the command line, possibly NULL. */
1205 init_asm_output (const char *name)
1207 if (name == NULL && asm_file_name == 0)
1208 asm_out_file = stdout;
1211 if (asm_file_name == 0)
1213 int len = strlen (dump_base_name);
1214 char *dumpname = xmalloc (len + 6);
1215 memcpy (dumpname, dump_base_name, len + 1);
1216 strip_off_ending (dumpname, len);
1217 strcat (dumpname, ".s");
1218 asm_file_name = dumpname;
1220 if (!strcmp (asm_file_name, "-"))
1221 asm_out_file = stdout;
1223 asm_out_file = fopen (asm_file_name, "w+b");
1224 if (asm_out_file == 0)
1225 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1228 if (!flag_syntax_only)
1230 targetm.asm_out.file_start ();
1232 #ifdef ASM_COMMENT_START
1233 if (flag_verbose_asm)
1235 /* Print the list of options in effect. */
1236 print_version (asm_out_file, ASM_COMMENT_START);
1237 print_switch_values (asm_out_file, 0, MAX_LINE,
1238 ASM_COMMENT_START, " ", "\n");
1239 /* Add a blank line here so it appears in assembler output but not
1241 fprintf (asm_out_file, "\n");
1247 /* Return true if the state of option OPTION should be stored in PCH files
1248 and checked by default_pch_valid_p. Store the option's current state
1252 option_affects_pch_p (int option, struct cl_option_state *state)
1254 if ((cl_options[option].flags & CL_TARGET) == 0)
1256 if (cl_options[option].flag_var == &target_flags)
1257 if (targetm.check_pch_target_flags)
1259 return get_option_state (option, state);
1262 /* Default version of get_pch_validity.
1263 By default, every flag difference is fatal; that will be mostly right for
1264 most targets, but completely right for very few. */
1267 default_get_pch_validity (size_t *len)
1269 struct cl_option_state state;
1274 if (targetm.check_pch_target_flags)
1275 *len += sizeof (target_flags);
1276 for (i = 0; i < cl_options_count; i++)
1277 if (option_affects_pch_p (i, &state))
1280 result = r = xmalloc (*len);
1284 if (targetm.check_pch_target_flags)
1286 memcpy (r, &target_flags, sizeof (target_flags));
1287 r += sizeof (target_flags);
1290 for (i = 0; i < cl_options_count; i++)
1291 if (option_affects_pch_p (i, &state))
1293 memcpy (r, state.data, state.size);
1300 /* Return a message which says that a PCH file was created with a different
1301 setting of OPTION. */
1304 pch_option_mismatch (const char *option)
1308 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1310 return _("out of memory");
1314 /* Default version of pch_valid_p. */
1317 default_pch_valid_p (const void *data_p, size_t len)
1319 struct cl_option_state state;
1320 const char *data = (const char *)data_p;
1323 /* -fpic and -fpie also usually make a PCH invalid. */
1324 if (data[0] != flag_pic)
1325 return _("created and used with different settings of -fpic");
1326 if (data[1] != flag_pie)
1327 return _("created and used with different settings of -fpie");
1330 /* Check target_flags. */
1331 if (targetm.check_pch_target_flags)
1336 memcpy (&tf, data, sizeof (target_flags));
1337 data += sizeof (target_flags);
1338 len -= sizeof (target_flags);
1339 r = targetm.check_pch_target_flags (tf);
1344 for (i = 0; i < cl_options_count; i++)
1345 if (option_affects_pch_p (i, &state))
1347 if (memcmp (data, state.data, state.size) != 0)
1348 return pch_option_mismatch (cl_options[i].opt_text);
1356 /* Default tree printer. Handles declarations only. */
1358 default_tree_printer (pretty_printer * pp, text_info *text)
1362 switch (*text->format_spec)
1365 t = va_arg (*text->args_ptr, tree);
1366 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1367 t = DECL_DEBUG_EXPR (t);
1372 t = va_arg (*text->args_ptr, tree);
1381 const char *n = DECL_NAME (t)
1382 ? lang_hooks.decl_printable_name (t, 2)
1387 dump_generic_node (pp, t, 0, 0, 0);
1392 /* Initialization of the front end environment, before command line
1393 options are parsed. Signal handlers, internationalization etc.
1394 ARGV0 is main's argv[0]. */
1396 general_init (const char *argv0)
1400 p = argv0 + strlen (argv0);
1401 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1405 xmalloc_set_program_name (progname);
1409 /* Unlock the stdio streams. */
1410 unlock_std_streams ();
1412 gcc_init_libintl ();
1414 /* Initialize the diagnostics reporting machinery, so option parsing
1415 can give warnings and errors. */
1416 diagnostic_initialize (global_dc);
1417 /* Set a default printer. Language specific initializations will
1418 override it later. */
1419 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1421 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1423 signal (SIGSEGV, crash_signal);
1426 signal (SIGILL, crash_signal);
1429 signal (SIGBUS, crash_signal);
1432 signal (SIGABRT, crash_signal);
1434 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1435 signal (SIGIOT, crash_signal);
1438 signal (SIGFPE, crash_signal);
1441 /* Other host-specific signal setup. */
1442 (*host_hooks.extra_signals)();
1444 /* Initialize the garbage-collector, string pools and tree type hash
1448 linemap_init (&line_table);
1451 /* Initialize register usage now so switches may override. */
1454 /* Register the language-independent parameters. */
1455 add_params (lang_independent_params, LAST_PARAM);
1457 /* This must be done after add_params but before argument processing. */
1458 init_ggc_heuristics();
1459 init_tree_optimization_passes ();
1462 /* Process the options that have been parsed. */
1464 process_options (void)
1466 /* Allow the front end to perform consistency checks and do further
1467 initialization based on the command line options. This hook also
1468 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1469 so we can correctly initialize debug output. */
1470 no_backend = lang_hooks.post_options (&main_input_filename);
1471 #ifndef USE_MAPPED_LOCATION
1472 input_filename = main_input_filename;
1475 #ifdef OVERRIDE_OPTIONS
1476 /* Some machines may reject certain combinations of options. */
1480 if (flag_short_enums == 2)
1481 flag_short_enums = targetm.default_short_enums ();
1483 /* Set aux_base_name if not already set. */
1486 else if (main_input_filename)
1488 char *name = xstrdup (lbasename (main_input_filename));
1490 strip_off_ending (name, strlen (name));
1491 aux_base_name = name;
1494 aux_base_name = "gccaux";
1496 /* Set up the align_*_log variables, defaulting them to 1 if they
1497 were still unset. */
1498 if (align_loops <= 0) align_loops = 1;
1499 if (align_loops_max_skip > align_loops || !align_loops)
1500 align_loops_max_skip = align_loops - 1;
1501 align_loops_log = floor_log2 (align_loops * 2 - 1);
1502 if (align_jumps <= 0) align_jumps = 1;
1503 if (align_jumps_max_skip > align_jumps || !align_jumps)
1504 align_jumps_max_skip = align_jumps - 1;
1505 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1506 if (align_labels <= 0) align_labels = 1;
1507 align_labels_log = floor_log2 (align_labels * 2 - 1);
1508 if (align_labels_max_skip > align_labels || !align_labels)
1509 align_labels_max_skip = align_labels - 1;
1510 if (align_functions <= 0) align_functions = 1;
1511 align_functions_log = floor_log2 (align_functions * 2 - 1);
1513 /* Unrolling all loops implies that standard loop unrolling must also
1515 if (flag_unroll_all_loops)
1516 flag_unroll_loops = 1;
1518 /* The loop unrolling code assumes that cse will be run after loop. */
1519 if (flag_unroll_loops || flag_peel_loops)
1520 flag_rerun_cse_after_loop = 1;
1522 /* If explicitly asked to run new loop optimizer, switch off the old
1524 if (flag_loop_optimize2)
1525 flag_loop_optimize = 0;
1527 /* Enable new loop optimizer pass if any of its optimizations is called. */
1528 if (flag_move_loop_invariants
1529 || flag_unswitch_loops
1531 || flag_unroll_loops
1532 || flag_branch_on_count_reg)
1533 flag_loop_optimize2 = 1;
1535 if (flag_non_call_exceptions)
1536 flag_asynchronous_unwind_tables = 1;
1537 if (flag_asynchronous_unwind_tables)
1538 flag_unwind_tables = 1;
1540 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1542 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1543 flag_unit_at_a_time = 0;
1545 if (flag_value_profile_transformations)
1546 flag_profile_values = 1;
1548 /* Speculative prefetching implies the value profiling. We also switch off
1549 the prefetching in the loop optimizer, so that we do not emit double
1550 prefetches. TODO -- we should teach these two to cooperate; the loop
1551 based prefetching may sometimes do a better job, especially in connection
1552 with reuse analysis. */
1553 if (flag_speculative_prefetching)
1555 flag_profile_values = 1;
1556 flag_prefetch_loop_arrays = 0;
1559 /* Warn about options that are not supported on this machine. */
1560 #ifndef INSN_SCHEDULING
1561 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1562 warning (0, "instruction scheduling not supported on this target machine");
1565 if (flag_delayed_branch)
1566 warning (0, "this target machine does not have delayed branches");
1569 user_label_prefix = USER_LABEL_PREFIX;
1570 if (flag_leading_underscore != -1)
1572 /* If the default prefix is more complicated than "" or "_",
1573 issue a warning and ignore this option. */
1574 if (user_label_prefix[0] == 0 ||
1575 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1577 user_label_prefix = flag_leading_underscore ? "_" : "";
1580 warning (0, "-f%sleading-underscore not supported on this target machine",
1581 flag_leading_underscore ? "" : "no-");
1584 /* If we are in verbose mode, write out the version and maybe all the
1585 option flags in use. */
1588 print_version (stderr, "");
1590 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
1593 if (flag_syntax_only)
1595 write_symbols = NO_DEBUG;
1599 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1601 if (debug_info_level == DINFO_LEVEL_NONE)
1602 write_symbols = NO_DEBUG;
1604 /* Now we know write_symbols, set up the debug hooks based on it.
1605 By default we do nothing for debug output. */
1606 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1607 default_debug_hooks = &do_nothing_debug_hooks;
1608 #if defined(DBX_DEBUGGING_INFO)
1609 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1610 default_debug_hooks = &dbx_debug_hooks;
1612 #if defined(XCOFF_DEBUGGING_INFO)
1613 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1614 default_debug_hooks = &xcoff_debug_hooks;
1616 #ifdef SDB_DEBUGGING_INFO
1617 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1618 default_debug_hooks = &sdb_debug_hooks;
1620 #ifdef DWARF2_DEBUGGING_INFO
1621 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1622 default_debug_hooks = &dwarf2_debug_hooks;
1624 #ifdef VMS_DEBUGGING_INFO
1625 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1626 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1627 default_debug_hooks = &vmsdbg_debug_hooks;
1630 debug_hooks = &do_nothing_debug_hooks;
1631 if (write_symbols == NO_DEBUG)
1633 #if defined(DBX_DEBUGGING_INFO)
1634 else if (write_symbols == DBX_DEBUG)
1635 debug_hooks = &dbx_debug_hooks;
1637 #if defined(XCOFF_DEBUGGING_INFO)
1638 else if (write_symbols == XCOFF_DEBUG)
1639 debug_hooks = &xcoff_debug_hooks;
1641 #ifdef SDB_DEBUGGING_INFO
1642 else if (write_symbols == SDB_DEBUG)
1643 debug_hooks = &sdb_debug_hooks;
1645 #ifdef DWARF2_DEBUGGING_INFO
1646 else if (write_symbols == DWARF2_DEBUG)
1647 debug_hooks = &dwarf2_debug_hooks;
1649 #ifdef VMS_DEBUGGING_INFO
1650 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1651 debug_hooks = &vmsdbg_debug_hooks;
1654 error ("target system does not support the \"%s\" debug format",
1655 debug_type_names[write_symbols]);
1657 /* Now we know which debug output will be used so we can set
1658 flag_var_tracking, flag_rename_registers if the user has
1659 not specified them. */
1660 if (debug_info_level < DINFO_LEVEL_NORMAL
1661 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1663 if (flag_var_tracking == 1)
1665 if (debug_info_level < DINFO_LEVEL_NORMAL)
1666 warning (0, "variable tracking requested, but useless unless "
1667 "producing debug info");
1669 warning (0, "variable tracking requested, but not supported "
1670 "by this debug format");
1672 flag_var_tracking = 0;
1675 if (flag_rename_registers == AUTODETECT_FLAG_VAR_TRACKING)
1676 flag_rename_registers = default_debug_hooks->var_location
1677 != do_nothing_debug_hooks.var_location;
1679 if (flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING)
1680 flag_var_tracking = optimize >= 1;
1682 /* If auxiliary info generation is desired, open the output file.
1683 This goes in the same directory as the source file--unlike
1684 all the other output files. */
1685 if (flag_gen_aux_info)
1687 aux_info_file = fopen (aux_info_file_name, "w");
1688 if (aux_info_file == 0)
1689 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1692 if (! targetm.have_named_sections)
1694 if (flag_function_sections)
1696 warning (0, "-ffunction-sections not supported for this target");
1697 flag_function_sections = 0;
1699 if (flag_data_sections)
1701 warning (0, "-fdata-sections not supported for this target");
1702 flag_data_sections = 0;
1706 if (flag_function_sections && profile_flag)
1708 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1709 flag_function_sections = 0;
1712 #ifndef HAVE_prefetch
1713 if (flag_prefetch_loop_arrays)
1715 warning (0, "-fprefetch-loop-arrays not supported for this target");
1716 flag_prefetch_loop_arrays = 0;
1718 if (flag_speculative_prefetching)
1720 if (flag_speculative_prefetching_set)
1721 warning (0, "-fspeculative-prefetching not supported for this target");
1722 flag_speculative_prefetching = 0;
1725 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1727 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1728 flag_prefetch_loop_arrays = 0;
1730 if (flag_speculative_prefetching && !HAVE_prefetch)
1732 if (flag_speculative_prefetching_set)
1733 warning (0, "-fspeculative-prefetching not supported for this target (try -march switches)");
1734 flag_speculative_prefetching = 0;
1738 /* This combination of options isn't handled for i386 targets and doesn't
1739 make much sense anyway, so don't allow it. */
1740 if (flag_prefetch_loop_arrays && optimize_size)
1742 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1743 flag_prefetch_loop_arrays = 0;
1746 #ifndef OBJECT_FORMAT_ELF
1747 if (flag_function_sections && write_symbols != NO_DEBUG)
1748 warning (0, "-ffunction-sections may affect debugging on some targets");
1751 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1752 if (flag_signaling_nans)
1753 flag_trapping_math = 1;
1755 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1756 if (flag_cx_limited_range)
1757 flag_complex_method = 0;
1759 /* Targets must be able to place spill slots at lower addresses. If the
1760 target already uses a soft frame pointer, the transition is trivial. */
1761 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1763 warning (0, "-fstack-protector not supported for this target");
1764 flag_stack_protect = 0;
1766 if (!flag_stack_protect)
1767 warn_stack_protect = 0;
1770 /* Initialize the compiler back end. */
1774 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1775 || debug_info_level == DINFO_LEVEL_VERBOSE
1776 #ifdef VMS_DEBUGGING_INFO
1777 /* Enable line number info for traceback. */
1778 || debug_info_level > DINFO_LEVEL_NONE
1780 || flag_test_coverage);
1784 init_fake_stack_mems ();
1788 init_varasm_once ();
1790 /* The following initialization functions need to generate rtl, so
1791 provide a dummy function context for them. */
1792 init_dummy_function_start ();
1794 if (flag_caller_saves)
1795 init_caller_save ();
1796 expand_dummy_function_end ();
1799 /* Language-dependent initialization. Returns nonzero on success. */
1801 lang_dependent_init (const char *name)
1803 location_t save_loc = input_location;
1804 if (dump_base_name == 0)
1805 dump_base_name = name && name[0] ? name : "gccdump";
1807 /* Other front-end initialization. */
1808 #ifdef USE_MAPPED_LOCATION
1809 input_location = BUILTINS_LOCATION;
1811 input_filename = "<built-in>";
1814 if (lang_hooks.init () == 0)
1816 input_location = save_loc;
1818 init_asm_output (name);
1820 /* These create various _DECL nodes, so need to be called after the
1821 front end is initialized. */
1825 /* The following initialization functions need to generate rtl, so
1826 provide a dummy function context for them. */
1827 init_dummy_function_start ();
1829 expand_dummy_function_end ();
1831 /* If dbx symbol table desired, initialize writing it and output the
1832 predefined types. */
1833 timevar_push (TV_SYMOUT);
1835 #ifdef DWARF2_UNWIND_INFO
1836 if (dwarf2out_do_frame ())
1837 dwarf2out_frame_init ();
1840 /* Now we have the correct original filename, we can initialize
1842 (*debug_hooks->init) (name);
1844 timevar_pop (TV_SYMOUT);
1849 /* Clean up: close opened files, etc. */
1854 /* Close the dump files. */
1855 if (flag_gen_aux_info)
1857 fclose (aux_info_file);
1859 unlink (aux_info_file_name);
1862 /* Close non-debugging input and output files. Take special care to note
1863 whether fclose returns an error, since the pages might still be on the
1864 buffer chain while the file is open. */
1868 if (ferror (asm_out_file) != 0)
1869 fatal_error ("error writing to %s: %m", asm_file_name);
1870 if (fclose (asm_out_file) != 0)
1871 fatal_error ("error closing %s: %m", asm_file_name);
1874 finish_optimization_passes ();
1878 ggc_print_statistics ();
1879 stringpool_statistics ();
1880 dump_tree_statistics ();
1881 dump_rtx_statistics ();
1882 dump_varray_statistics ();
1883 dump_alloc_pool_statistics ();
1884 dump_ggc_loc_statistics ();
1887 /* Free up memory for the benefit of leak detectors. */
1890 /* Language-specific end of compilation actions. */
1891 lang_hooks.finish ();
1894 /* Initialize the compiler, and compile the input file. */
1898 /* Initialize timing first. The C front ends read the main file in
1899 the post_options hook, and C++ does file timings. */
1900 if (time_report || !quiet_flag || flag_detailed_statistics)
1902 timevar_start (TV_TOTAL);
1906 /* Don't do any more if an error has already occurred. */
1909 /* This must be run always, because it is needed to compute the FP
1910 predefined macros, such as __LDBL_MAX__, for targets using non
1911 default FP formats. */
1912 init_adjust_machine_modes ();
1914 /* Set up the back-end if requested. */
1918 /* Language-dependent initialization. Returns true on success. */
1919 if (lang_dependent_init (main_input_filename))
1925 /* Stop timing and print the times. */
1926 timevar_stop (TV_TOTAL);
1927 timevar_print (stderr);
1930 /* Entry point of cc1, cc1plus, jc1, f771, etc.
1931 Exit code is FATAL_EXIT_CODE if can't open files or if there were
1932 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
1934 It is not safe to call this function more than once. */
1937 toplev_main (unsigned int argc, const char **argv)
1941 /* Initialization of GCC's environment, and diagnostics. */
1942 general_init (argv[0]);
1944 /* Parse the options and do minimal processing; basically just
1945 enough to default flags appropriately. */
1946 decode_options (argc, argv);
1950 /* Exit early if we can (e.g. -help). */
1951 if (!exit_after_options)
1954 if (errorcount || sorrycount)
1955 return (FATAL_EXIT_CODE);
1957 return (SUCCESS_EXIT_CODE);