1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
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. */
29 #include "coretypes.h"
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
44 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
49 #include "insn-attr.h"
50 #include "insn-config.h"
51 #include "insn-flags.h"
52 #include "hard-reg-set.h"
59 #include "basic-block.h"
65 #include "diagnostic.h"
66 #include "tree-diagnostic.h"
67 #include "tree-pretty-print.h"
71 #include "dwarf2asm.h"
72 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
81 #include "opts-diagnostic.h"
83 #include "value-prof.h"
84 #include "alloc-pool.h"
85 #include "tree-mudflap.h"
86 #include "tree-pass.h"
88 #include "tree-ssa-alias.h"
91 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
92 #include "dwarf2out.h"
95 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
99 #ifdef SDB_DEBUGGING_INFO
103 #ifdef XCOFF_DEBUGGING_INFO
104 #include "xcoffout.h" /* Needed for external data
105 declarations for e.g. AIX 4.x. */
108 static void general_init (const char *);
109 static void do_compile (void);
110 static void process_options (void);
111 static void backend_init (void);
112 static int lang_dependent_init (const char *);
113 static void init_asm_output (const char *);
114 static void finalize (void);
116 static void crash_signal (int) ATTRIBUTE_NORETURN;
117 static void setup_core_dumping (void);
118 static void compile_file (void);
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 /* Decoded options, and number of such options. */
130 static struct cl_decoded_option *save_decoded_options;
131 static unsigned int save_decoded_options_count;
133 /* Name of top-level original source file (what was input to cpp).
134 This comes from the #-command at the beginning of the actual input.
135 If there isn't any there, then this is the cc1 input file name. */
137 const char *main_input_filename;
139 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
140 to optimize in process_options (). */
141 #define AUTODETECT_VALUE 2
143 /* Name to use as base of names for dump output files. */
145 const char *dump_base_name;
147 /* Directory used for dump output files. */
149 const char *dump_dir_name;
151 /* Name to use as a base for auxiliary output files. */
153 const char *aux_base_name;
155 /* Prefix for profile data files */
156 const char *profile_data_prefix;
158 /* A mask of target_flags that includes bit X if X was set or cleared
159 on the command line. */
161 int target_flags_explicit;
163 /* Debug hooks - dependent upon command line options. */
165 const struct gcc_debug_hooks *debug_hooks;
167 /* Other flags saying which kinds of debugging dump have been requested. */
169 int rtl_dump_and_exit;
170 int flag_print_asm_name;
171 enum graph_dump_types graph_dump_format;
173 /* Name for output file of assembly code, specified with -o. */
175 const char *asm_file_name;
177 /* Nonzero means do optimizations. -O.
178 Particular numeric values stand for particular amounts of optimization;
179 thus, -O2 stores 2 here. However, the optimizations beyond the basic
180 ones are not controlled directly by this variable. Instead, they are
181 controlled by individual `flag_...' variables that are defaulted
182 based on this variable. */
186 /* Nonzero means optimize for size. -Os.
187 The only valid values are zero and nonzero. When optimize_size is
188 nonzero, optimize defaults to 2, but certain individual code
189 bloating optimizations are disabled. */
191 int optimize_size = 0;
193 /* True if this is the lto front end. This is used to disable
194 gimple generation and lowering passes that are normally run on the
195 output of a front end. These passes must be bypassed for lto since
196 they have already been done before the gimple was written. */
198 bool in_lto_p = false;
200 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
202 int flag_generate_lto;
204 /* The FUNCTION_DECL for the function currently being compiled,
205 or 0 if between functions. */
206 tree current_function_decl;
208 /* Set to the FUNC_BEGIN label of the current function, or NULL
210 const char * current_function_func_begin_label;
212 /* A random sequence of characters, unless overridden by user. */
213 static const char *flag_random_seed;
215 /* A local time stamp derived from the time of compilation. It will be
216 zero if the system cannot provide a time. It will be -1u, if the
217 user has specified a particular random seed. */
222 /* 0 means straightforward implementation of complex divide acceptable.
223 1 means wide ranges of inputs must work for complex divide.
224 2 means C99-like requirements for complex multiply and divide. */
226 int flag_complex_method = 1;
228 /* Nonzero means we should be saving declaration info into a .X file. */
230 int flag_gen_aux_info = 0;
232 /* Specified name of aux-info file. */
234 const char *aux_info_file_name;
236 /* Nonzero if we are compiling code for a shared library, zero for
241 /* Generate code for GNU or NeXT Objective-C runtime environment. */
243 #ifdef NEXT_OBJC_RUNTIME
244 int flag_next_runtime = 1;
246 int flag_next_runtime = 0;
249 /* Set to the default thread-local storage (tls) model to use. */
251 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
253 /* Set the default region and algorithm for the integrated register
256 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
257 enum ira_region flag_ira_region = IRA_REGION_MIXED;
259 /* Set the default for excess precision. */
261 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
263 /* Nonzero means change certain warnings into errors.
264 Usually these are warnings about failure to conform to some standard. */
266 int flag_pedantic_errors = 0;
268 /* Nonzero means make permerror produce warnings instead of errors. */
270 int flag_permissive = 0;
272 /* -dA causes debug commentary information to be produced in
273 the generated assembly code (to make it more readable). This option
274 is generally only of use to those who actually need to read the
275 generated assembly code (perhaps while debugging the compiler itself).
276 Currently, this switch is only used by dwarfout.c; however, it is intended
277 to be a catchall for printing debug information in the assembler file. */
279 int flag_debug_asm = 0;
281 /* -dP causes the rtl to be emitted as a comment in assembly. */
283 int flag_dump_rtl_in_asm = 0;
285 /* When non-NULL, indicates that whenever space is allocated on the
286 stack, the resulting stack pointer must not pass this
287 address---that is, for stacks that grow downward, the stack pointer
288 must always be greater than or equal to this address; for stacks
289 that grow upward, the stack pointer must be less than this address.
290 At present, the rtx may be either a REG or a SYMBOL_REF, although
291 the support provided depends on the backend. */
294 /* Positive if we should track variables, negative if we should run
295 the var-tracking pass only to discard debug annotations, zero if
296 we're not to run it. When flag_var_tracking == AUTODETECT_VALUE it
297 will be set according to optimize, debug_info_level and debug_hooks
298 in process_options (). */
299 int flag_var_tracking = AUTODETECT_VALUE;
301 /* Positive if we should track variables at assignments, negative if
302 we should run the var-tracking pass only to discard debug
303 annotations. When flag_var_tracking_assignments ==
304 AUTODETECT_VALUE it will be set according to flag_var_tracking. */
305 int flag_var_tracking_assignments = AUTODETECT_VALUE;
307 /* Nonzero if we should toggle flag_var_tracking_assignments after
308 processing options and computing its default. */
309 int flag_var_tracking_assignments_toggle = 0;
311 /* Type of stack check. */
312 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
314 /* True if the user has tagged the function with the 'section'
317 bool user_defined_section_attribute = false;
319 struct target_flag_state default_target_flag_state;
320 #if SWITCHABLE_TARGET
321 struct target_flag_state *this_target_flag_state = &default_target_flag_state;
323 #define this_target_flag_state (&default_target_flag_state)
328 const char *const string;
332 lang_independent_options;
334 /* Nonzero if subexpressions must be evaluated from left-to-right. */
335 int flag_evaluation_order = 0;
337 /* The user symbol prefix after having resolved same. */
338 const char *user_label_prefix;
340 static const param_info lang_independent_params[] = {
341 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
342 { OPTION, DEFAULT, false, MIN, MAX, HELP },
343 #include "params.def"
345 { NULL, 0, false, 0, 0, NULL }
348 /* Output files for assembler code (real compiler output)
349 and debugging dumps. */
353 FILE *dump_file = NULL;
354 const char *dump_file_name;
356 /* The current working directory of a translation. It's generally the
357 directory from which compilation was initiated, but a preprocessed
358 file may specify the original directory in which it was
361 static const char *src_pwd;
363 /* Initialize src_pwd with the given string, and return true. If it
364 was already initialized, return false. As a special case, it may
365 be called with a NULL argument to test whether src_pwd has NOT been
369 set_src_pwd (const char *pwd)
373 if (strcmp (src_pwd, pwd) == 0)
379 src_pwd = xstrdup (pwd);
383 /* Return the directory from which the translation unit was initiated,
384 in case set_src_pwd() was not called before to assign it a
400 /* Called when the start of a function definition is parsed,
401 this function prints on stderr the name of the function. */
403 announce_function (tree decl)
407 if (rtl_dump_and_exit)
408 fprintf (stderr, "%s ",
409 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
411 fprintf (stderr, " %s",
412 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
414 pp_needs_newline (global_dc->printer) = true;
415 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
419 /* Initialize local_tick with the time of day, or -1 if
420 flag_random_seed is set. */
423 init_local_tick (void)
425 if (!flag_random_seed)
427 /* Get some more or less random data. */
428 #ifdef HAVE_GETTIMEOFDAY
432 gettimeofday (&tv, NULL);
433 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
437 time_t now = time (NULL);
439 if (now != (time_t)-1)
440 local_tick = (unsigned) now;
448 /* Set up a default flag_random_seed and local_tick, unless the user
449 already specified one. Must be called after init_local_tick. */
452 init_random_seed (void)
454 unsigned HOST_WIDE_INT value;
455 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
457 value = local_tick ^ getpid ();
459 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
460 flag_random_seed = random_seed;
463 /* Obtain the random_seed string. Unless NOINIT, initialize it if
464 it's not provided in the command line. */
467 get_random_seed (bool noinit)
469 if (!flag_random_seed && !noinit)
471 return flag_random_seed;
474 /* Modify the random_seed string to VAL. Return its previous
478 set_random_seed (const char *val)
480 const char *old = flag_random_seed;
481 flag_random_seed = val;
485 #if GCC_VERSION < 3004
487 /* The functions floor_log2 and exact_log2 are defined as inline
488 functions in toplev.h if GCC_VERSION >= 3004. The definitions here
489 are used for older versions of gcc. */
491 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
492 If X is 0, return -1. */
495 floor_log2 (unsigned HOST_WIDE_INT x)
502 if (HOST_BITS_PER_WIDE_INT > 64)
503 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
505 if (HOST_BITS_PER_WIDE_INT > 32)
506 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
508 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
510 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
512 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
514 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
516 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
522 /* Return the logarithm of X, base 2, considering X unsigned,
523 if X is a power of 2. Otherwise, returns -1. */
526 exact_log2 (unsigned HOST_WIDE_INT x)
530 return floor_log2 (x);
533 #endif /* GCC_VERSION < 3004 */
535 /* Handler for fatal signals, such as SIGSEGV. These are transformed
536 into ICE messages, which is much more user friendly. In case the
537 error printer crashes, reset the signal to prevent infinite recursion. */
540 crash_signal (int signo)
542 signal (signo, SIG_DFL);
544 /* If we crashed while processing an ASM statement, then be a little more
545 graceful. It's most likely the user's fault. */
546 if (this_is_asm_operands)
548 output_operand_lossage ("unrecoverable error");
549 exit (FATAL_EXIT_CODE);
552 internal_error ("%s", strsignal (signo));
555 /* Arrange to dump core on error. (The regular error message is still
556 printed first, except in the case of abort().) */
559 setup_core_dumping (void)
562 signal (SIGABRT, SIG_DFL);
564 #if defined(HAVE_SETRLIMIT)
567 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
568 fatal_error ("getting core file size maximum limit: %m");
569 rlim.rlim_cur = rlim.rlim_max;
570 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
571 fatal_error ("setting core file size limit to maximum: %m");
574 diagnostic_abort_on_error (global_dc);
578 /* Strip off a legitimate source ending from the input string NAME of
579 length LEN. Rather than having to know the names used by all of
580 our front ends, we strip off an ending of a period followed by
581 up to five characters. (Java uses ".class".) */
584 strip_off_ending (char *name, int len)
587 for (i = 2; i < 6 && len > i; i++)
589 if (name[len - i] == '.')
591 name[len - i] = '\0';
597 /* Output a quoted string. */
600 output_quoted_string (FILE *asm_file, const char *string)
602 #ifdef OUTPUT_QUOTED_STRING
603 OUTPUT_QUOTED_STRING (asm_file, string);
607 putc ('\"', asm_file);
608 while ((c = *string++) != 0)
612 if (c == '\"' || c == '\\')
613 putc ('\\', asm_file);
617 fprintf (asm_file, "\\%03o", (unsigned char) c);
619 putc ('\"', asm_file);
623 /* Output a file name in the form wanted by System V. */
626 output_file_directive (FILE *asm_file, const char *input_name)
631 if (input_name == NULL)
632 input_name = "<stdin>";
634 input_name = remap_debug_filename (input_name);
636 len = strlen (input_name);
637 na = input_name + len;
639 /* NA gets INPUT_NAME sans directory names. */
640 while (na > input_name)
642 if (IS_DIR_SEPARATOR (na[-1]))
647 #ifdef ASM_OUTPUT_SOURCE_FILENAME
648 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
650 fprintf (asm_file, "\t.file\t");
651 output_quoted_string (asm_file, na);
652 putc ('\n', asm_file);
656 /* A subroutine of wrapup_global_declarations. We've come to the end of
657 the compilation unit. All deferred variables should be undeferred,
658 and all incomplete decls should be finalized. */
661 wrapup_global_declaration_1 (tree decl)
663 /* We're not deferring this any longer. Assignment is conditional to
664 avoid needlessly dirtying PCH pages. */
665 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
666 && DECL_DEFER_OUTPUT (decl) != 0)
667 DECL_DEFER_OUTPUT (decl) = 0;
669 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
670 lang_hooks.finish_incomplete_decl (decl);
673 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
674 needs to be output. Return true if it is output. */
677 wrapup_global_declaration_2 (tree decl)
679 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
682 /* Don't write out static consts, unless we still need them.
684 We also keep static consts if not optimizing (for debugging),
685 unless the user specified -fno-keep-static-consts.
686 ??? They might be better written into the debug information.
687 This is possible when using DWARF.
689 A language processor that wants static constants to be always
690 written out (even if it is not used) is responsible for
691 calling rest_of_decl_compilation itself. E.g. the C front-end
692 calls rest_of_decl_compilation from finish_decl.
693 One motivation for this is that is conventional in some
694 environments to write things like:
695 static const char rcsid[] = "... version string ...";
696 intending to force the string to be in the executable.
698 A language processor that would prefer to have unneeded
699 static constants "optimized away" would just defer writing
700 them out until here. E.g. C++ does this, because static
701 constants are often defined in header files.
703 ??? A tempting alternative (for both C and C++) would be
704 to force a constant to be written if and only if it is
705 defined in a main file, as opposed to an include file. */
707 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
709 struct varpool_node *node;
711 node = varpool_get_node (decl);
713 if (!node && flag_ltrans)
715 else if (node && node->finalized)
717 else if (node && node->alias)
719 else if (!cgraph_global_info_ready
721 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
723 else if (node && node->needed)
725 else if (DECL_COMDAT (decl))
727 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
728 && (optimize || !flag_keep_static_consts
729 || DECL_ARTIFICIAL (decl)))
734 rest_of_decl_compilation (decl, 1, 1);
742 /* Do any final processing required for the declarations in VEC, of
743 which there are LEN. We write out inline functions and variables
744 that have been deferred until this point, but which are required.
745 Returns nonzero if anything was put out. */
748 wrapup_global_declarations (tree *vec, int len)
750 bool reconsider, output_something = false;
753 for (i = 0; i < len; i++)
754 wrapup_global_declaration_1 (vec[i]);
756 /* Now emit any global variables or functions that we have been
757 putting off. We need to loop in case one of the things emitted
758 here references another one which comes earlier in the list. */
762 for (i = 0; i < len; i++)
763 reconsider |= wrapup_global_declaration_2 (vec[i]);
765 output_something = true;
769 return output_something;
772 /* A subroutine of check_global_declarations. Issue appropriate warnings
773 for the global declaration DECL. */
776 check_global_declaration_1 (tree decl)
778 /* Warn about any function declared static but not defined. We don't
779 warn about variables, because many programs have static variables
780 that exist only to get some text into the object file. */
781 if (TREE_CODE (decl) == FUNCTION_DECL
782 && DECL_INITIAL (decl) == 0
783 && DECL_EXTERNAL (decl)
784 && ! DECL_ARTIFICIAL (decl)
785 && ! TREE_NO_WARNING (decl)
786 && ! TREE_PUBLIC (decl)
787 && (warn_unused_function
788 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
790 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
791 pedwarn (input_location, 0, "%q+F used but never defined", decl);
793 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
794 /* This symbol is effectively an "extern" declaration now. */
795 TREE_PUBLIC (decl) = 1;
796 assemble_external (decl);
799 /* Warn about static fns or vars defined but not used. */
800 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
801 /* We don't warn about "static const" variables because the
802 "rcs_id" idiom uses that construction. */
803 || (warn_unused_variable
804 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
805 && ! DECL_IN_SYSTEM_HEADER (decl)
806 && ! TREE_USED (decl)
807 /* The TREE_USED bit for file-scope decls is kept in the identifier,
808 to handle multiple external decls in different scopes. */
809 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
810 && ! DECL_EXTERNAL (decl)
811 && ! TREE_PUBLIC (decl)
812 /* A volatile variable might be used in some non-obvious way. */
813 && ! TREE_THIS_VOLATILE (decl)
814 /* Global register variables must be declared to reserve them. */
815 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
816 /* Otherwise, ask the language. */
817 && lang_hooks.decls.warn_unused_global (decl))
818 warning ((TREE_CODE (decl) == FUNCTION_DECL)
819 ? OPT_Wunused_function
820 : OPT_Wunused_variable,
821 "%q+D defined but not used", decl);
824 /* Issue appropriate warnings for the global declarations in VEC (of
825 which there are LEN). */
828 check_global_declarations (tree *vec, int len)
832 for (i = 0; i < len; i++)
833 check_global_declaration_1 (vec[i]);
836 /* Emit debugging information for all global declarations in VEC. */
839 emit_debug_global_declarations (tree *vec, int len)
843 /* Avoid confusing the debug information machinery when there are errors. */
847 timevar_push (TV_SYMOUT);
848 for (i = 0; i < len; i++)
849 debug_hooks->global_decl (vec[i]);
850 timevar_pop (TV_SYMOUT);
853 /* Warn about a use of an identifier which was marked deprecated. */
855 warn_deprecated_use (tree node, tree attr)
859 if (node == 0 || !warn_deprecated_decl)
865 attr = DECL_ATTRIBUTES (node);
866 else if (TYPE_P (node))
868 tree decl = TYPE_STUB_DECL (node);
870 attr = lookup_attribute ("deprecated",
871 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
876 attr = lookup_attribute ("deprecated", attr);
879 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
885 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
887 warning (OPT_Wdeprecated_declarations,
888 "%qD is deprecated (declared at %s:%d): %s",
889 node, xloc.file, xloc.line, msg);
891 warning (OPT_Wdeprecated_declarations,
892 "%qD is deprecated (declared at %s:%d)",
893 node, xloc.file, xloc.line);
895 else if (TYPE_P (node))
897 tree what = NULL_TREE;
898 tree decl = TYPE_STUB_DECL (node);
900 if (TYPE_NAME (node))
902 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
903 what = TYPE_NAME (node);
904 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
905 && DECL_NAME (TYPE_NAME (node)))
906 what = DECL_NAME (TYPE_NAME (node));
911 expanded_location xloc
912 = expand_location (DECL_SOURCE_LOCATION (decl));
916 warning (OPT_Wdeprecated_declarations,
917 "%qE is deprecated (declared at %s:%d): %s",
918 what, xloc.file, xloc.line, msg);
920 warning (OPT_Wdeprecated_declarations,
921 "%qE is deprecated (declared at %s:%d)", what,
922 xloc.file, xloc.line);
927 warning (OPT_Wdeprecated_declarations,
928 "type is deprecated (declared at %s:%d): %s",
929 xloc.file, xloc.line, msg);
931 warning (OPT_Wdeprecated_declarations,
932 "type is deprecated (declared at %s:%d)",
933 xloc.file, xloc.line);
941 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
944 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
949 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
952 warning (OPT_Wdeprecated_declarations, "type is deprecated");
958 /* Compile an entire translation unit. Write a file of assembly
959 output and various debugging dumps. */
964 /* Initialize yet another pass. */
966 ggc_protect_identifiers = true;
969 init_final (main_input_filename);
970 coverage_init (aux_base_name);
972 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
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 /* 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 || flag_wpa)
987 ggc_protect_identifiers = false;
989 /* This must also call cgraph_finalize_compilation_unit. */
990 lang_hooks.decls.final_write_globals ();
995 /* Ensure that emulated TLS control vars are finalized and build
996 a static constructor for them, when it is required. */
997 if (!targetm.have_tls)
1000 varpool_assemble_pending_decls ();
1001 finish_aliases_2 ();
1003 /* Likewise for mudflap static object registrations. */
1005 mudflap_finish_file ();
1007 output_shared_constant_pool ();
1008 output_object_blocks ();
1010 /* Write out any pending weak symbol declarations. */
1013 /* This must be at the end before unwind and debug info.
1014 Some target ports emit PIC setup thunks here. */
1015 targetm.asm_out.code_end ();
1017 /* Do dbx symbols. */
1018 timevar_push (TV_SYMOUT);
1020 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1021 if (dwarf2out_do_frame ())
1022 dwarf2out_frame_finish ();
1025 (*debug_hooks->finish) (main_input_filename);
1026 timevar_pop (TV_SYMOUT);
1028 /* Output some stuff at end of file if nec. */
1030 dw2_output_indirect_constants ();
1032 /* Flush any pending external directives. */
1033 process_pending_assemble_externals ();
1035 /* Emit LTO marker if LTO info has been previously emitted. This is
1036 used by collect2 to determine whether an object file contains IL.
1037 We used to emit an undefined reference here, but this produces
1038 link errors if an object file with IL is stored into a shared
1039 library without invoking lto1. */
1040 if (flag_generate_lto)
1042 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1043 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
1045 (unsigned HOST_WIDE_INT) 1, 8);
1046 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1047 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
1048 (unsigned HOST_WIDE_INT) 1, 8);
1050 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
1051 (unsigned HOST_WIDE_INT) 1,
1052 (unsigned HOST_WIDE_INT) 1);
1056 /* Attach a special .ident directive to the end of the file to identify
1057 the version of GCC which compiled this code. The format of the .ident
1058 string is patterned after the ones produced by native SVR4 compilers. */
1062 const char *pkg_version = "(GNU) ";
1064 if (strcmp ("(GCC) ", pkgversion_string))
1065 pkg_version = pkgversion_string;
1066 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1067 IDENT_ASM_OP, pkg_version, version_string);
1071 /* Invoke registered plugin callbacks. */
1072 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
1074 /* This must be at the end. Some target ports emit end of file directives
1075 into the assembly file here, and hence we can not output anything to the
1076 assembly file after this point. */
1077 targetm.asm_out.file_end ();
1080 /* Parse a -d... command line switch. */
1083 decode_d_option (const char *arg)
1094 flag_print_asm_name = 1;
1097 flag_dump_rtl_in_asm = 1;
1098 flag_print_asm_name = 1;
1101 graph_dump_format = vcg;
1104 rtl_dump_and_exit = 1;
1109 case 'D': /* These are handled by the preprocessor. */
1116 setup_core_dumping();
1119 enable_rtl_dump_file ();
1123 warning (0, "unrecognized gcc debugging option: %c", c);
1128 /* Indexed by enum debug_info_type. */
1129 const char *const debug_type_names[] =
1131 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1134 /* Print version information to FILE.
1135 Each line begins with INDENT (for the case where FILE is the
1136 assembler output file). */
1139 print_version (FILE *file, const char *indent)
1141 static const char fmt1[] =
1143 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1145 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1148 static const char fmt2[] =
1149 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1150 static const char fmt3[] =
1151 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1152 static const char fmt4[] =
1153 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1155 #define __VERSION__ "[?]"
1158 file == stderr ? _(fmt1) : fmt1,
1159 indent, *indent != 0 ? " " : "",
1160 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1161 indent, __VERSION__);
1163 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1164 two string formats, "i.j.k" and "i.j" when k is zero. As of
1165 gmp-4.3.0, GMP always uses the 3 number format. */
1166 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1167 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1168 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1169 #define GCC_GMP_VERSION \
1170 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1171 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1172 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1173 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1175 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1176 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1177 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1180 file == stderr ? _(fmt2) : fmt2,
1181 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
1182 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1184 file == stderr ? _(fmt3) : fmt3,
1185 indent, *indent != 0 ? " " : "",
1186 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1187 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1189 file == stderr ? _(fmt3) : fmt3,
1190 indent, *indent != 0 ? " " : "",
1191 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1192 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1194 file == stderr ? _(fmt3) : fmt3,
1195 indent, *indent != 0 ? " " : "",
1196 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1198 file == stderr ? _(fmt4) : fmt4,
1199 indent, *indent != 0 ? " " : "",
1200 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1202 print_plugins_versions (file, indent);
1205 #ifdef ASM_COMMENT_START
1207 print_to_asm_out_file (print_switch_type type, const char * text)
1209 bool prepend_sep = true;
1213 case SWITCH_TYPE_LINE_END:
1214 putc ('\n', asm_out_file);
1217 case SWITCH_TYPE_LINE_START:
1218 fputs (ASM_COMMENT_START, asm_out_file);
1219 return strlen (ASM_COMMENT_START);
1221 case SWITCH_TYPE_DESCRIPTIVE:
1222 if (ASM_COMMENT_START[0] == 0)
1223 prepend_sep = false;
1225 case SWITCH_TYPE_PASSED:
1226 case SWITCH_TYPE_ENABLED:
1228 fputc (' ', asm_out_file);
1229 fputs (text, asm_out_file);
1230 /* No need to return the length here as
1231 print_single_switch has already done it. */
1241 print_to_stderr (print_switch_type type, const char * text)
1245 case SWITCH_TYPE_LINE_END:
1246 putc ('\n', stderr);
1249 case SWITCH_TYPE_LINE_START:
1252 case SWITCH_TYPE_PASSED:
1253 case SWITCH_TYPE_ENABLED:
1254 fputc (' ', stderr);
1257 case SWITCH_TYPE_DESCRIPTIVE:
1258 fputs (text, stderr);
1259 /* No need to return the length here as
1260 print_single_switch has already done it. */
1268 /* Print an option value and return the adjusted position in the line.
1269 ??? print_fn doesn't handle errors, eg disk full; presumably other
1270 code will catch a disk full though. */
1273 print_single_switch (print_switch_fn_type print_fn,
1275 print_switch_type type,
1278 /* The ultrix fprintf returns 0 on success, so compute the result
1279 we want here since we need it for the following test. The +1
1280 is for the separator character that will probably be emitted. */
1281 int len = strlen (text) + 1;
1284 && pos + len > MAX_LINE)
1286 print_fn (SWITCH_TYPE_LINE_END, NULL);
1291 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1293 print_fn (type, text);
1297 /* Print active target switches using PRINT_FN.
1298 POS is the current cursor position and MAX is the size of a "line".
1299 Each line begins with INDENT and ends with TERM.
1300 Each switch is separated from the next by SEP. */
1303 print_switch_values (print_switch_fn_type print_fn)
1308 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1309 that it can be printed below. This helps reproducibility. */
1310 if (!flag_random_seed)
1311 init_random_seed ();
1313 /* Print the options as passed. */
1314 pos = print_single_switch (print_fn, pos,
1315 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1317 for (j = 1; j < save_decoded_options_count; j++)
1319 switch (save_decoded_options[j].opt_index)
1332 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED,
1333 save_decoded_options[j].orig_option_with_args_text);
1337 print_fn (SWITCH_TYPE_LINE_END, NULL);
1339 /* Print the -f and -m options that have been enabled.
1340 We don't handle language specific options but printing argv
1342 pos = print_single_switch (print_fn, 0,
1343 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1345 for (j = 0; j < cl_options_count; j++)
1346 if ((cl_options[j].flags & CL_REPORT)
1347 && option_enabled (j) > 0)
1348 pos = print_single_switch (print_fn, pos,
1349 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1351 print_fn (SWITCH_TYPE_LINE_END, NULL);
1354 /* Open assembly code output file. Do this even if -fsyntax-only is
1355 on, because then the driver will have provided the name of a
1356 temporary file or bit bucket for us. NAME is the file specified on
1357 the command line, possibly NULL. */
1359 init_asm_output (const char *name)
1361 if (name == NULL && asm_file_name == 0)
1362 asm_out_file = stdout;
1365 if (asm_file_name == 0)
1367 int len = strlen (dump_base_name);
1368 char *dumpname = XNEWVEC (char, len + 6);
1370 memcpy (dumpname, dump_base_name, len + 1);
1371 strip_off_ending (dumpname, len);
1372 strcat (dumpname, ".s");
1373 asm_file_name = dumpname;
1375 if (!strcmp (asm_file_name, "-"))
1376 asm_out_file = stdout;
1378 asm_out_file = fopen (asm_file_name, "w+b");
1379 if (asm_out_file == 0)
1380 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1383 if (!flag_syntax_only)
1385 targetm.asm_out.file_start ();
1387 if (flag_record_gcc_switches)
1389 if (targetm.asm_out.record_gcc_switches)
1391 /* Let the target know that we are about to start recording. */
1392 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1394 /* Now record the switches. */
1395 print_switch_values (targetm.asm_out.record_gcc_switches);
1396 /* Let the target know that the recording is over. */
1397 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1401 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1404 #ifdef ASM_COMMENT_START
1405 if (flag_verbose_asm)
1407 /* Print the list of switches in effect
1408 into the assembler file as comments. */
1409 print_version (asm_out_file, ASM_COMMENT_START);
1410 print_switch_values (print_to_asm_out_file);
1411 putc ('\n', asm_out_file);
1417 /* Return true if the state of option OPTION should be stored in PCH files
1418 and checked by default_pch_valid_p. Store the option's current state
1422 option_affects_pch_p (int option, struct cl_option_state *state)
1424 if ((cl_options[option].flags & CL_TARGET) == 0)
1426 if (cl_options[option].flag_var == &target_flags)
1427 if (targetm.check_pch_target_flags)
1429 return get_option_state (option, state);
1432 /* Default version of get_pch_validity.
1433 By default, every flag difference is fatal; that will be mostly right for
1434 most targets, but completely right for very few. */
1437 default_get_pch_validity (size_t *sz)
1439 struct cl_option_state state;
1444 if (targetm.check_pch_target_flags)
1445 *sz += sizeof (target_flags);
1446 for (i = 0; i < cl_options_count; i++)
1447 if (option_affects_pch_p (i, &state))
1450 result = r = XNEWVEC (char, *sz);
1454 if (targetm.check_pch_target_flags)
1456 memcpy (r, &target_flags, sizeof (target_flags));
1457 r += sizeof (target_flags);
1460 for (i = 0; i < cl_options_count; i++)
1461 if (option_affects_pch_p (i, &state))
1463 memcpy (r, state.data, state.size);
1470 /* Return a message which says that a PCH file was created with a different
1471 setting of OPTION. */
1474 pch_option_mismatch (const char *option)
1478 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1480 return _("out of memory");
1484 /* Default version of pch_valid_p. */
1487 default_pch_valid_p (const void *data_p, size_t len)
1489 struct cl_option_state state;
1490 const char *data = (const char *)data_p;
1493 /* -fpic and -fpie also usually make a PCH invalid. */
1494 if (data[0] != flag_pic)
1495 return _("created and used with different settings of -fpic");
1496 if (data[1] != flag_pie)
1497 return _("created and used with different settings of -fpie");
1500 /* Check target_flags. */
1501 if (targetm.check_pch_target_flags)
1506 memcpy (&tf, data, sizeof (target_flags));
1507 data += sizeof (target_flags);
1508 len -= sizeof (target_flags);
1509 r = targetm.check_pch_target_flags (tf);
1514 for (i = 0; i < cl_options_count; i++)
1515 if (option_affects_pch_p (i, &state))
1517 if (memcmp (data, state.data, state.size) != 0)
1518 return pch_option_mismatch (cl_options[i].opt_text);
1526 /* Default tree printer. Handles declarations only. */
1528 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
1529 int precision, bool wide, bool set_locus, bool hash)
1533 /* FUTURE: %+x should set the locus. */
1534 if (precision != 0 || wide || hash)
1540 t = va_arg (*text->args_ptr, tree);
1541 if (TREE_CODE (t) == IDENTIFIER_NODE)
1543 pp_identifier (pp, IDENTIFIER_POINTER (t));
1549 t = va_arg (*text->args_ptr, tree);
1550 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1551 t = DECL_DEBUG_EXPR (t);
1556 t = va_arg (*text->args_ptr, tree);
1560 percent_K_format (text);
1567 if (set_locus && text->locus)
1568 *text->locus = DECL_SOURCE_LOCATION (t);
1572 const char *n = DECL_NAME (t)
1573 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1578 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1583 /* A helper function; used as the reallocator function for cpp's line
1586 realloc_for_line_map (void *ptr, size_t len)
1588 return GGC_RESIZEVAR (void, ptr, len);
1591 /* A helper function: used as the allocator function for
1592 identifier_to_locale. */
1594 alloc_for_identifier_to_locale (size_t len)
1596 return ggc_alloc_atomic (len);
1599 /* Initialization of the front end environment, before command line
1600 options are parsed. Signal handlers, internationalization etc.
1601 ARGV0 is main's argv[0]. */
1603 general_init (const char *argv0)
1607 p = argv0 + strlen (argv0);
1608 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1612 xmalloc_set_program_name (progname);
1616 /* Unlock the stdio streams. */
1617 unlock_std_streams ();
1619 gcc_init_libintl ();
1621 identifier_to_locale_alloc = alloc_for_identifier_to_locale;
1622 identifier_to_locale_free = ggc_free;
1624 /* Initialize the diagnostics reporting machinery, so option parsing
1625 can give warnings and errors. */
1626 diagnostic_initialize (global_dc, N_OPTS);
1627 diagnostic_starter (global_dc) = default_tree_diagnostic_starter;
1628 /* Set a default printer. Language specific initializations will
1629 override it later. */
1630 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1631 global_dc->show_option_requested = flag_diagnostics_show_option;
1632 global_dc->show_column = flag_show_column;
1633 global_dc->internal_error = plugins_internal_error_function;
1634 global_dc->option_enabled = option_enabled;
1635 global_dc->option_name = option_name;
1637 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1639 signal (SIGSEGV, crash_signal);
1642 signal (SIGILL, crash_signal);
1645 signal (SIGBUS, crash_signal);
1648 signal (SIGABRT, crash_signal);
1650 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1651 signal (SIGIOT, crash_signal);
1654 signal (SIGFPE, crash_signal);
1657 /* Other host-specific signal setup. */
1658 (*host_hooks.extra_signals)();
1660 /* Initialize the garbage-collector, string pools and tree type hash
1664 line_table = ggc_alloc_line_maps ();
1665 linemap_init (line_table);
1666 line_table->reallocator = realloc_for_line_map;
1669 /* Initialize register usage now so switches may override. */
1672 /* Register the language-independent parameters. */
1673 add_params (lang_independent_params, LAST_PARAM);
1675 /* This must be done after add_params but before argument processing. */
1676 init_ggc_heuristics();
1677 init_optimization_passes ();
1678 statistics_early_init ();
1681 /* Return true if the current target supports -fsection-anchors. */
1684 target_supports_section_anchors_p (void)
1686 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1689 if (targetm.asm_out.output_anchor == NULL)
1695 /* Default the align_* variables to 1 if they're still unset, and
1696 set up the align_*_log variables. */
1698 init_alignments (void)
1700 if (align_loops <= 0)
1702 if (align_loops_max_skip > align_loops)
1703 align_loops_max_skip = align_loops - 1;
1704 align_loops_log = floor_log2 (align_loops * 2 - 1);
1705 if (align_jumps <= 0)
1707 if (align_jumps_max_skip > align_jumps)
1708 align_jumps_max_skip = align_jumps - 1;
1709 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1710 if (align_labels <= 0)
1712 align_labels_log = floor_log2 (align_labels * 2 - 1);
1713 if (align_labels_max_skip > align_labels)
1714 align_labels_max_skip = align_labels - 1;
1715 if (align_functions <= 0)
1716 align_functions = 1;
1717 align_functions_log = floor_log2 (align_functions * 2 - 1);
1720 /* Process the options that have been parsed. */
1722 process_options (void)
1724 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1725 This can happen with incorrect pre-processed input. */
1726 debug_hooks = &do_nothing_debug_hooks;
1728 /* This replaces set_Wunused. */
1729 if (warn_unused_function == -1)
1730 warn_unused_function = warn_unused;
1731 if (warn_unused_label == -1)
1732 warn_unused_label = warn_unused;
1733 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1734 if (warn_unused_parameter == -1)
1735 warn_unused_parameter = (warn_unused && extra_warnings);
1736 if (warn_unused_variable == -1)
1737 warn_unused_variable = warn_unused;
1738 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1740 if (warn_unused_but_set_parameter == -1)
1741 warn_unused_but_set_parameter = (warn_unused && extra_warnings);
1742 if (warn_unused_but_set_variable == -1)
1743 warn_unused_but_set_variable = warn_unused;
1744 if (warn_unused_value == -1)
1745 warn_unused_value = warn_unused;
1747 /* This replaces set_Wextra. */
1748 if (warn_uninitialized == -1)
1749 warn_uninitialized = extra_warnings;
1751 /* Allow the front end to perform consistency checks and do further
1752 initialization based on the command line options. This hook also
1753 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1754 so we can correctly initialize debug output. */
1755 no_backend = lang_hooks.post_options (&main_input_filename);
1757 /* Some machines may reject certain combinations of options. */
1758 targetm.target_option.override ();
1760 /* Avoid any informative notes in the second run of -fcompare-debug. */
1761 if (flag_compare_debug)
1762 diagnostic_inhibit_notes (global_dc);
1764 if (flag_section_anchors && !target_supports_section_anchors_p ())
1766 warning (OPT_fsection_anchors,
1767 "this target does not support %qs", "-fsection-anchors");
1768 flag_section_anchors = 0;
1771 if (flag_short_enums == 2)
1772 flag_short_enums = targetm.default_short_enums ();
1774 /* Set aux_base_name if not already set. */
1777 else if (main_input_filename)
1779 char *name = xstrdup (lbasename (main_input_filename));
1781 strip_off_ending (name, strlen (name));
1782 aux_base_name = name;
1785 aux_base_name = "gccaux";
1790 || flag_loop_interchange
1791 || flag_loop_strip_mine
1792 || flag_graphite_identity
1793 || flag_loop_parallelize_all)
1794 sorry ("Graphite loop optimizations cannot be used");
1797 /* Unrolling all loops implies that standard loop unrolling must also
1799 if (flag_unroll_all_loops)
1800 flag_unroll_loops = 1;
1802 /* The loop unrolling code assumes that cse will be run after loop.
1803 web and rename-registers also help when run after loop unrolling. */
1804 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1805 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1807 if (flag_web == AUTODETECT_VALUE)
1808 flag_web = flag_unroll_loops || flag_peel_loops;
1810 if (flag_rename_registers == AUTODETECT_VALUE)
1811 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1813 if (flag_non_call_exceptions)
1814 flag_asynchronous_unwind_tables = 1;
1815 if (flag_asynchronous_unwind_tables)
1816 flag_unwind_tables = 1;
1818 if (flag_value_profile_transformations)
1819 flag_profile_values = 1;
1821 /* Warn about options that are not supported on this machine. */
1822 #ifndef INSN_SCHEDULING
1823 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1824 warning (0, "instruction scheduling not supported on this target machine");
1827 if (flag_delayed_branch)
1828 warning (0, "this target machine does not have delayed branches");
1831 user_label_prefix = USER_LABEL_PREFIX;
1832 if (flag_leading_underscore != -1)
1834 /* If the default prefix is more complicated than "" or "_",
1835 issue a warning and ignore this option. */
1836 if (user_label_prefix[0] == 0 ||
1837 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1839 user_label_prefix = flag_leading_underscore ? "_" : "";
1842 warning (0, "-f%sleading-underscore not supported on this target machine",
1843 flag_leading_underscore ? "" : "no-");
1846 /* If we are in verbose mode, write out the version and maybe all the
1847 option flags in use. */
1850 print_version (stderr, "");
1852 print_switch_values (print_to_stderr);
1855 if (flag_syntax_only)
1857 write_symbols = NO_DEBUG;
1863 if (debug_info_level == DINFO_LEVEL_NONE)
1865 debug_info_level = DINFO_LEVEL_NORMAL;
1867 if (write_symbols == NO_DEBUG)
1868 write_symbols = PREFERRED_DEBUGGING_TYPE;
1871 debug_info_level = DINFO_LEVEL_NONE;
1874 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1876 FILE *final_output = fopen (flag_dump_final_insns, "w");
1879 error ("could not open final insn dump file %qs: %m",
1880 flag_dump_final_insns);
1881 flag_dump_final_insns = NULL;
1883 else if (fclose (final_output))
1885 error ("could not close zeroed insn dump file %qs: %m",
1886 flag_dump_final_insns);
1887 flag_dump_final_insns = NULL;
1891 /* Unless over-ridden for the target, assume that all DWARF levels
1892 may be emitted, if DWARF2_DEBUG is selected. */
1893 if (dwarf_strict < 0)
1896 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1898 if (debug_info_level == DINFO_LEVEL_NONE)
1899 write_symbols = NO_DEBUG;
1901 if (write_symbols == NO_DEBUG)
1903 #if defined(DBX_DEBUGGING_INFO)
1904 else if (write_symbols == DBX_DEBUG)
1905 debug_hooks = &dbx_debug_hooks;
1907 #if defined(XCOFF_DEBUGGING_INFO)
1908 else if (write_symbols == XCOFF_DEBUG)
1909 debug_hooks = &xcoff_debug_hooks;
1911 #ifdef SDB_DEBUGGING_INFO
1912 else if (write_symbols == SDB_DEBUG)
1913 debug_hooks = &sdb_debug_hooks;
1915 #ifdef DWARF2_DEBUGGING_INFO
1916 else if (write_symbols == DWARF2_DEBUG)
1917 debug_hooks = &dwarf2_debug_hooks;
1919 #ifdef VMS_DEBUGGING_INFO
1920 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1921 debug_hooks = &vmsdbg_debug_hooks;
1924 error ("target system does not support the \"%s\" debug format",
1925 debug_type_names[write_symbols]);
1927 /* We know which debug output will be used so we can set flag_var_tracking
1928 and flag_var_tracking_uninit if the user has not specified them. */
1929 if (debug_info_level < DINFO_LEVEL_NORMAL
1930 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1932 if (flag_var_tracking == 1
1933 || flag_var_tracking_uninit == 1)
1935 if (debug_info_level < DINFO_LEVEL_NORMAL)
1936 warning (0, "variable tracking requested, but useless unless "
1937 "producing debug info");
1939 warning (0, "variable tracking requested, but not supported "
1940 "by this debug format");
1942 flag_var_tracking = 0;
1943 flag_var_tracking_uninit = 0;
1946 /* If the user specifically requested variable tracking with tagging
1947 uninitialized variables, we need to turn on variable tracking.
1948 (We already determined above that variable tracking is feasible.) */
1949 if (flag_var_tracking_uninit)
1950 flag_var_tracking = 1;
1952 if (flag_var_tracking == AUTODETECT_VALUE)
1953 flag_var_tracking = optimize >= 1;
1955 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
1956 flag_var_tracking_assignments = flag_var_tracking
1957 && !(flag_selective_scheduling || flag_selective_scheduling2);
1959 if (flag_var_tracking_assignments_toggle)
1960 flag_var_tracking_assignments = !flag_var_tracking_assignments;
1962 if (flag_var_tracking_assignments && !flag_var_tracking)
1963 flag_var_tracking = flag_var_tracking_assignments = -1;
1965 if (flag_var_tracking_assignments
1966 && (flag_selective_scheduling || flag_selective_scheduling2))
1967 warning (0, "var-tracking-assignments changes selective scheduling");
1969 if (flag_tree_cselim == AUTODETECT_VALUE)
1970 #ifdef HAVE_conditional_move
1971 flag_tree_cselim = 1;
1973 flag_tree_cselim = 0;
1976 /* If auxiliary info generation is desired, open the output file.
1977 This goes in the same directory as the source file--unlike
1978 all the other output files. */
1979 if (flag_gen_aux_info)
1981 aux_info_file = fopen (aux_info_file_name, "w");
1982 if (aux_info_file == 0)
1983 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1986 if (! targetm.have_named_sections)
1988 if (flag_function_sections)
1990 warning (0, "-ffunction-sections not supported for this target");
1991 flag_function_sections = 0;
1993 if (flag_data_sections)
1995 warning (0, "-fdata-sections not supported for this target");
1996 flag_data_sections = 0;
2000 if (flag_function_sections && profile_flag)
2002 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2003 flag_function_sections = 0;
2006 #ifndef HAVE_prefetch
2007 if (flag_prefetch_loop_arrays > 0)
2009 warning (0, "-fprefetch-loop-arrays not supported for this target");
2010 flag_prefetch_loop_arrays = 0;
2013 if (flag_prefetch_loop_arrays > 0 && !HAVE_prefetch)
2015 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2016 flag_prefetch_loop_arrays = 0;
2020 /* This combination of options isn't handled for i386 targets and doesn't
2021 make much sense anyway, so don't allow it. */
2022 if (flag_prefetch_loop_arrays > 0 && optimize_size)
2024 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2025 flag_prefetch_loop_arrays = 0;
2028 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2029 if (flag_signaling_nans)
2030 flag_trapping_math = 1;
2032 /* We cannot reassociate if we want traps or signed zeros. */
2033 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2035 warning (0, "-fassociative-math disabled; other options take precedence");
2036 flag_associative_math = 0;
2039 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2040 if (flag_cx_limited_range)
2041 flag_complex_method = 0;
2043 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2044 if (flag_cx_fortran_rules)
2045 flag_complex_method = 1;
2047 /* Targets must be able to place spill slots at lower addresses. If the
2048 target already uses a soft frame pointer, the transition is trivial. */
2049 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2051 warning (0, "-fstack-protector not supported for this target");
2052 flag_stack_protect = 0;
2054 if (!flag_stack_protect)
2055 warn_stack_protect = 0;
2057 /* ??? Unwind info is not correct around the CFG unless either a frame
2058 pointer is present or A_O_A is set. Fixing this requires rewriting
2059 unwind info generation to be aware of the CFG and propagating states
2061 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2062 && flag_omit_frame_pointer)
2064 warning (0, "unwind tables currently require a frame pointer "
2066 flag_omit_frame_pointer = 0;
2069 /* Save the current optimization options. */
2070 optimization_default_node = build_optimization_node ();
2071 optimization_current_node = optimization_default_node;
2074 /* This function can be called multiple times to reinitialize the compiler
2075 back end when register classes or instruction sets have changed,
2076 before each function. */
2078 backend_init_target (void)
2080 /* Initialize alignment variables. */
2083 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2084 to initialize reg_raw_mode[]. */
2087 /* This invokes target hooks to set fixed_reg[] etc, which is
2091 /* This depends on stack_pointer_rtx. */
2092 init_fake_stack_mems ();
2094 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2096 init_alias_target ();
2098 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2101 /* The following initialization functions need to generate rtl, so
2102 provide a dummy function context for them. */
2103 init_dummy_function_start ();
2105 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2106 on a mode change. */
2109 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2110 after a mode change as well. */
2111 caller_save_initialized_p = false;
2113 expand_dummy_function_end ();
2116 /* Initialize the compiler back end. This function is called only once,
2117 when starting the compiler. */
2124 init_inline_once ();
2125 init_varasm_once ();
2126 save_register_info ();
2128 /* Initialize the target-specific back end pieces. */
2130 backend_init_target ();
2133 /* Initialize excess precision settings. */
2135 init_excess_precision (void)
2137 /* Adjust excess precision handling based on the target options. If
2138 the front end cannot handle it, flag_excess_precision_cmdline
2139 will already have been set accordingly in the post_options
2141 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2142 flag_excess_precision = flag_excess_precision_cmdline;
2143 if (flag_unsafe_math_optimizations)
2144 flag_excess_precision = EXCESS_PRECISION_FAST;
2145 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2147 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2148 switch (flt_eval_method)
2152 /* Either the target acts unpredictably (-1) or has all the
2153 operations required not to have excess precision (0). */
2154 flag_excess_precision = EXCESS_PRECISION_FAST;
2158 /* In these cases, predictable excess precision makes
2162 /* Any other implementation-defined FLT_EVAL_METHOD values
2163 require the compiler to handle the associated excess
2164 precision rules in excess_precision_type. */
2170 /* Initialize things that are both lang-dependent and target-dependent.
2171 This function can be called more than once if target parameters change. */
2173 lang_dependent_init_target (void)
2175 /* This determines excess precision settings. */
2176 init_excess_precision ();
2178 /* This creates various _DECL nodes, so needs to be called after the
2179 front end is initialized. It also depends on the HAVE_xxx macros
2180 generated from the target machine description. */
2183 /* The following initialization functions need to generate rtl, so
2184 provide a dummy function context for them. */
2185 init_dummy_function_start ();
2187 /* Do the target-specific parts of expr initialization. */
2188 init_expr_target ();
2190 /* Although the actions of these functions are language-independent,
2191 they use optabs, so we cannot call them from backend_init. */
2195 expand_dummy_function_end ();
2198 /* Language-dependent initialization. Returns nonzero on success. */
2200 lang_dependent_init (const char *name)
2202 location_t save_loc = input_location;
2203 if (dump_base_name == 0)
2204 dump_base_name = name && name[0] ? name : "gccdump";
2206 /* Other front-end initialization. */
2207 input_location = BUILTINS_LOCATION;
2208 if (lang_hooks.init () == 0)
2210 input_location = save_loc;
2212 init_asm_output (name);
2214 /* This creates various _DECL nodes, so needs to be called after the
2215 front end is initialized. */
2218 /* Do the target-specific parts of the initialization. */
2219 lang_dependent_init_target ();
2221 /* If dbx symbol table desired, initialize writing it and output the
2222 predefined types. */
2223 timevar_push (TV_SYMOUT);
2225 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2226 if (dwarf2out_do_frame ())
2227 dwarf2out_frame_init ();
2230 /* Now we have the correct original filename, we can initialize
2232 (*debug_hooks->init) (name);
2234 timevar_pop (TV_SYMOUT);
2240 /* Reinitialize everything when target parameters, such as register usage,
2243 target_reinit (void)
2245 /* Reinitialize RTL backend. */
2246 backend_init_target ();
2248 /* Reinitialize lang-dependent parts. */
2249 lang_dependent_init_target ();
2253 dump_memory_report (bool final)
2255 ggc_print_statistics ();
2256 stringpool_statistics ();
2257 dump_tree_statistics ();
2258 dump_gimple_statistics ();
2259 dump_rtx_statistics ();
2260 dump_alloc_pool_statistics ();
2261 dump_bitmap_statistics ();
2262 dump_vec_loc_statistics ();
2263 dump_ggc_loc_statistics (final);
2264 dump_alias_stats (stderr);
2265 dump_pta_stats (stderr);
2268 /* Clean up: close opened files, etc. */
2273 /* Close the dump files. */
2274 if (flag_gen_aux_info)
2276 fclose (aux_info_file);
2278 unlink (aux_info_file_name);
2281 /* Close non-debugging input and output files. Take special care to note
2282 whether fclose returns an error, since the pages might still be on the
2283 buffer chain while the file is open. */
2287 if (ferror (asm_out_file) != 0)
2288 fatal_error ("error writing to %s: %m", asm_file_name);
2289 if (fclose (asm_out_file) != 0)
2290 fatal_error ("error closing %s: %m", asm_file_name);
2292 unlink_if_ordinary (asm_file_name);
2296 finish_optimization_passes ();
2301 dump_memory_report (true);
2303 /* Language-specific end of compilation actions. */
2304 lang_hooks.finish ();
2307 /* Initialize the compiler, and compile the input file. */
2311 /* Initialize timing first. The C front ends read the main file in
2312 the post_options hook, and C++ does file timings. */
2313 if (time_report || !quiet_flag || flag_detailed_statistics)
2315 timevar_start (TV_TOTAL);
2319 /* Don't do any more if an error has already occurred. */
2322 /* This must be run always, because it is needed to compute the FP
2323 predefined macros, such as __LDBL_MAX__, for targets using non
2324 default FP formats. */
2325 init_adjust_machine_modes ();
2327 /* Set up the back-end if requested. */
2331 /* Language-dependent initialization. Returns true on success. */
2332 if (lang_dependent_init (main_input_filename))
2338 /* Stop timing and print the times. */
2339 timevar_stop (TV_TOTAL);
2340 timevar_print (stderr);
2343 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2344 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2345 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2347 It is not safe to call this function more than once. */
2350 toplev_main (int argc, char **argv)
2352 expandargv (&argc, &argv);
2354 /* Initialization of GCC's environment, and diagnostics. */
2355 general_init (argv[0]);
2357 /* Parse the options and do minimal processing; basically just
2358 enough to default flags appropriately. */
2359 decode_options (argc, CONST_CAST2 (const char **, char **, argv),
2360 &save_decoded_options, &save_decoded_options_count);
2364 initialize_plugins ();
2367 print_version (stderr, "");
2370 print_plugins_help (stderr, "");
2372 /* Exit early if we can (e.g. -help). */
2373 if (!exit_after_options)
2376 if (warningcount || errorcount)
2377 print_ignored_options ();
2378 diagnostic_finish (global_dc);
2380 /* Invoke registered plugin callbacks if any. */
2381 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2383 finalize_plugins ();
2385 return (FATAL_EXIT_CODE);
2387 return (SUCCESS_EXIT_CODE);