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"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
87 #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 /* 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 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
143 to optimize in process_options (). */
144 #define AUTODETECT_VALUE 2
146 /* Current position in real source file. */
148 location_t input_location;
150 struct line_maps *line_table;
152 /* Name to use as base of names for dump output files. */
154 const char *dump_base_name;
156 /* Directory used for dump output files. */
158 const char *dump_dir_name;
160 /* Name to use as a base for auxiliary output files. */
162 const char *aux_base_name;
164 /* Prefix for profile data files */
165 const char *profile_data_prefix;
167 /* A mask of target_flags that includes bit X if X was set or cleared
168 on the command line. */
170 int target_flags_explicit;
172 /* Debug hooks - dependent upon command line options. */
174 const struct gcc_debug_hooks *debug_hooks;
176 /* Other flags saying which kinds of debugging dump have been requested. */
178 int rtl_dump_and_exit;
179 int flag_print_asm_name;
180 enum graph_dump_types graph_dump_format;
182 /* Name for output file of assembly code, specified with -o. */
184 const char *asm_file_name;
186 /* Nonzero means do optimizations. -O.
187 Particular numeric values stand for particular amounts of optimization;
188 thus, -O2 stores 2 here. However, the optimizations beyond the basic
189 ones are not controlled directly by this variable. Instead, they are
190 controlled by individual `flag_...' variables that are defaulted
191 based on this variable. */
195 /* Nonzero means optimize for size. -Os.
196 The only valid values are zero and nonzero. When optimize_size is
197 nonzero, optimize defaults to 2, but certain individual code
198 bloating optimizations are disabled. */
200 int optimize_size = 0;
202 /* True if this is the lto front end. This is used to disable
203 gimple generation and lowering passes that are normally run on the
204 output of a front end. These passes must be bypassed for lto since
205 they have already been done before the gimple was written. */
207 bool in_lto_p = false;
209 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
211 int flag_generate_lto;
213 /* The FUNCTION_DECL for the function currently being compiled,
214 or 0 if between functions. */
215 tree current_function_decl;
217 /* Set to the FUNC_BEGIN label of the current function, or NULL
219 const char * current_function_func_begin_label;
221 /* Nonzero means to collect statistics which might be expensive
222 and to print them when we are done. */
223 int flag_detailed_statistics = 0;
225 /* A random sequence of characters, unless overridden by user. */
226 static const char *flag_random_seed;
228 /* A local time stamp derived from the time of compilation. It will be
229 zero if the system cannot provide a time. It will be -1u, if the
230 user has specified a particular random seed. */
235 /* Nonzero means `char' should be signed. */
237 int flag_signed_char;
239 /* Nonzero means give an enum type only as many bytes as it needs. A value
240 of 2 means it has not yet been initialized. */
242 int flag_short_enums;
244 /* Nonzero if structures and unions should be returned in memory.
246 This should only be defined if compatibility with another compiler or
247 with an ABI is needed, because it results in slower code. */
249 #ifndef DEFAULT_PCC_STRUCT_RETURN
250 #define DEFAULT_PCC_STRUCT_RETURN 1
253 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
255 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
257 /* 0 means straightforward implementation of complex divide acceptable.
258 1 means wide ranges of inputs must work for complex divide.
259 2 means C99-like requirements for complex multiply and divide. */
261 int flag_complex_method = 1;
263 /* Nonzero means we should be saving declaration info into a .X file. */
265 int flag_gen_aux_info = 0;
267 /* Specified name of aux-info file. */
269 const char *aux_info_file_name;
271 /* Nonzero if we are compiling code for a shared library, zero for
276 /* Generate code for GNU or NeXT Objective-C runtime environment. */
278 #ifdef NEXT_OBJC_RUNTIME
279 int flag_next_runtime = 1;
281 int flag_next_runtime = 0;
284 /* Set to the default thread-local storage (tls) model to use. */
286 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
288 /* Set the default region and algorithm for the integrated register
291 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
292 enum ira_region flag_ira_region = IRA_REGION_MIXED;
294 /* Set the default value for -fira-verbose. */
296 unsigned int flag_ira_verbose = 5;
298 /* Set the default for excess precision. */
300 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
301 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
303 /* Nonzero means change certain warnings into errors.
304 Usually these are warnings about failure to conform to some standard. */
306 int flag_pedantic_errors = 0;
308 /* Nonzero means make permerror produce warnings instead of errors. */
310 int flag_permissive = 0;
312 /* -dA causes debug commentary information to be produced in
313 the generated assembly code (to make it more readable). This option
314 is generally only of use to those who actually need to read the
315 generated assembly code (perhaps while debugging the compiler itself).
316 Currently, this switch is only used by dwarfout.c; however, it is intended
317 to be a catchall for printing debug information in the assembler file. */
319 int flag_debug_asm = 0;
321 /* -dP causes the rtl to be emitted as a comment in assembly. */
323 int flag_dump_rtl_in_asm = 0;
325 /* When non-NULL, indicates that whenever space is allocated on the
326 stack, the resulting stack pointer must not pass this
327 address---that is, for stacks that grow downward, the stack pointer
328 must always be greater than or equal to this address; for stacks
329 that grow upward, the stack pointer must be less than this address.
330 At present, the rtx may be either a REG or a SYMBOL_REF, although
331 the support provided depends on the backend. */
334 /* Positive if we should track variables, negative if we should run
335 the var-tracking pass only to discard debug annotations, zero if
336 we're not to run it. When flag_var_tracking == AUTODETECT_VALUE it
337 will be set according to optimize, debug_info_level and debug_hooks
338 in process_options (). */
339 int flag_var_tracking = AUTODETECT_VALUE;
341 /* Positive if we should track variables at assignments, negative if
342 we should run the var-tracking pass only to discard debug
343 annotations. When flag_var_tracking_assignments ==
344 AUTODETECT_VALUE it will be set according to flag_var_tracking. */
345 int flag_var_tracking_assignments = AUTODETECT_VALUE;
347 /* Nonzero if we should toggle flag_var_tracking_assignments after
348 processing options and computing its default. */
349 int flag_var_tracking_assignments_toggle = 0;
351 /* Type of stack check. */
352 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
354 /* True if the user has tagged the function with the 'section'
357 bool user_defined_section_attribute = false;
359 /* Values of the -falign-* flags: how much to align labels in code.
360 0 means `use default', 1 means `don't align'.
361 For each variable, there is an _log variant which is the power
362 of two not less than the variable, for .align output. */
365 int align_loops_max_skip;
367 int align_jumps_max_skip;
368 int align_labels_log;
369 int align_labels_max_skip;
370 int align_functions_log;
374 const char *const string;
378 lang_independent_options;
380 /* Nonzero if subexpressions must be evaluated from left-to-right. */
381 int flag_evaluation_order = 0;
383 /* The user symbol prefix after having resolved same. */
384 const char *user_label_prefix;
386 static const param_info lang_independent_params[] = {
387 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
388 { OPTION, DEFAULT, false, MIN, MAX, HELP },
389 #include "params.def"
391 { NULL, 0, false, 0, 0, NULL }
394 /* Output files for assembler code (real compiler output)
395 and debugging dumps. */
399 FILE *dump_file = NULL;
400 const char *dump_file_name;
402 /* The current working directory of a translation. It's generally the
403 directory from which compilation was initiated, but a preprocessed
404 file may specify the original directory in which it was
407 static const char *src_pwd;
409 /* Initialize src_pwd with the given string, and return true. If it
410 was already initialized, return false. As a special case, it may
411 be called with a NULL argument to test whether src_pwd has NOT been
415 set_src_pwd (const char *pwd)
419 if (strcmp (src_pwd, pwd) == 0)
425 src_pwd = xstrdup (pwd);
429 /* Return the directory from which the translation unit was initiated,
430 in case set_src_pwd() was not called before to assign it a
446 /* Called when the start of a function definition is parsed,
447 this function prints on stderr the name of the function. */
449 announce_function (tree decl)
453 if (rtl_dump_and_exit)
454 fprintf (stderr, "%s ",
455 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
457 fprintf (stderr, " %s",
458 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
460 pp_needs_newline (global_dc->printer) = true;
461 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
465 /* Initialize local_tick with the time of day, or -1 if
466 flag_random_seed is set. */
469 init_local_tick (void)
471 if (!flag_random_seed)
473 /* Get some more or less random data. */
474 #ifdef HAVE_GETTIMEOFDAY
478 gettimeofday (&tv, NULL);
479 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
483 time_t now = time (NULL);
485 if (now != (time_t)-1)
486 local_tick = (unsigned) now;
494 /* Set up a default flag_random_seed and local_tick, unless the user
495 already specified one. Must be called after init_local_tick. */
498 init_random_seed (void)
500 unsigned HOST_WIDE_INT value;
501 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
503 value = local_tick ^ getpid ();
505 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
506 flag_random_seed = random_seed;
509 /* Obtain the random_seed string. Unless NOINIT, initialize it if
510 it's not provided in the command line. */
513 get_random_seed (bool noinit)
515 if (!flag_random_seed && !noinit)
517 return flag_random_seed;
520 /* Modify the random_seed string to VAL. Return its previous
524 set_random_seed (const char *val)
526 const char *old = flag_random_seed;
527 flag_random_seed = val;
531 /* Decode the string P as an integral parameter.
532 If the string is indeed an integer return its numeric value else
533 issue an Invalid Option error for the option PNAME and return DEFVAL.
534 If PNAME is zero just return DEFVAL, do not call error. */
537 read_integral_parameter (const char *p, const char *pname, const int defval)
539 const char *endp = p;
552 error ("invalid option argument %qs", pname);
559 #if GCC_VERSION < 3004
561 /* The functions floor_log2 and exact_log2 are defined as inline
562 functions in toplev.h if GCC_VERSION >= 3004. The definitions here
563 are used for older versions of gcc. */
565 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
566 If X is 0, return -1. */
569 floor_log2 (unsigned HOST_WIDE_INT x)
576 if (HOST_BITS_PER_WIDE_INT > 64)
577 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
579 if (HOST_BITS_PER_WIDE_INT > 32)
580 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
582 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
584 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
586 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
588 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
590 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
596 /* Return the logarithm of X, base 2, considering X unsigned,
597 if X is a power of 2. Otherwise, returns -1. */
600 exact_log2 (unsigned HOST_WIDE_INT x)
604 return floor_log2 (x);
607 #endif /* GCC_VERSION < 3004 */
609 /* Handler for fatal signals, such as SIGSEGV. These are transformed
610 into ICE messages, which is much more user friendly. In case the
611 error printer crashes, reset the signal to prevent infinite recursion. */
614 crash_signal (int signo)
616 signal (signo, SIG_DFL);
618 /* If we crashed while processing an ASM statement, then be a little more
619 graceful. It's most likely the user's fault. */
620 if (this_is_asm_operands)
622 output_operand_lossage ("unrecoverable error");
623 exit (FATAL_EXIT_CODE);
626 internal_error ("%s", strsignal (signo));
629 /* Arrange to dump core on error. (The regular error message is still
630 printed first, except in the case of abort().) */
633 setup_core_dumping (void)
636 signal (SIGABRT, SIG_DFL);
638 #if defined(HAVE_SETRLIMIT)
641 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
642 fatal_error ("getting core file size maximum limit: %m");
643 rlim.rlim_cur = rlim.rlim_max;
644 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
645 fatal_error ("setting core file size limit to maximum: %m");
648 diagnostic_abort_on_error (global_dc);
652 /* Strip off a legitimate source ending from the input string NAME of
653 length LEN. Rather than having to know the names used by all of
654 our front ends, we strip off an ending of a period followed by
655 up to five characters. (Java uses ".class".) */
658 strip_off_ending (char *name, int len)
661 for (i = 2; i < 6 && len > i; i++)
663 if (name[len - i] == '.')
665 name[len - i] = '\0';
671 /* Output a quoted string. */
674 output_quoted_string (FILE *asm_file, const char *string)
676 #ifdef OUTPUT_QUOTED_STRING
677 OUTPUT_QUOTED_STRING (asm_file, string);
681 putc ('\"', asm_file);
682 while ((c = *string++) != 0)
686 if (c == '\"' || c == '\\')
687 putc ('\\', asm_file);
691 fprintf (asm_file, "\\%03o", (unsigned char) c);
693 putc ('\"', asm_file);
697 /* Output a file name in the form wanted by System V. */
700 output_file_directive (FILE *asm_file, const char *input_name)
705 if (input_name == NULL)
706 input_name = "<stdin>";
708 input_name = remap_debug_filename (input_name);
710 len = strlen (input_name);
711 na = input_name + len;
713 /* NA gets INPUT_NAME sans directory names. */
714 while (na > input_name)
716 if (IS_DIR_SEPARATOR (na[-1]))
721 #ifdef ASM_OUTPUT_SOURCE_FILENAME
722 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
724 fprintf (asm_file, "\t.file\t");
725 output_quoted_string (asm_file, na);
726 putc ('\n', asm_file);
730 /* A subroutine of wrapup_global_declarations. We've come to the end of
731 the compilation unit. All deferred variables should be undeferred,
732 and all incomplete decls should be finalized. */
735 wrapup_global_declaration_1 (tree decl)
737 /* We're not deferring this any longer. Assignment is conditional to
738 avoid needlessly dirtying PCH pages. */
739 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
740 && DECL_DEFER_OUTPUT (decl) != 0)
741 DECL_DEFER_OUTPUT (decl) = 0;
743 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
744 lang_hooks.finish_incomplete_decl (decl);
747 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
748 needs to be output. Return true if it is output. */
751 wrapup_global_declaration_2 (tree decl)
753 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
756 /* Don't write out static consts, unless we still need them.
758 We also keep static consts if not optimizing (for debugging),
759 unless the user specified -fno-keep-static-consts.
760 ??? They might be better written into the debug information.
761 This is possible when using DWARF.
763 A language processor that wants static constants to be always
764 written out (even if it is not used) is responsible for
765 calling rest_of_decl_compilation itself. E.g. the C front-end
766 calls rest_of_decl_compilation from finish_decl.
767 One motivation for this is that is conventional in some
768 environments to write things like:
769 static const char rcsid[] = "... version string ...";
770 intending to force the string to be in the executable.
772 A language processor that would prefer to have unneeded
773 static constants "optimized away" would just defer writing
774 them out until here. E.g. C++ does this, because static
775 constants are often defined in header files.
777 ??? A tempting alternative (for both C and C++) would be
778 to force a constant to be written if and only if it is
779 defined in a main file, as opposed to an include file. */
781 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
783 struct varpool_node *node;
785 node = varpool_node (decl);
789 else if (node->alias)
791 else if (!cgraph_global_info_ready
793 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
795 else if (node->needed)
797 else if (DECL_COMDAT (decl))
799 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
800 && (optimize || !flag_keep_static_consts
801 || DECL_ARTIFICIAL (decl)))
806 rest_of_decl_compilation (decl, 1, 1);
814 /* Do any final processing required for the declarations in VEC, of
815 which there are LEN. We write out inline functions and variables
816 that have been deferred until this point, but which are required.
817 Returns nonzero if anything was put out. */
820 wrapup_global_declarations (tree *vec, int len)
822 bool reconsider, output_something = false;
825 for (i = 0; i < len; i++)
826 wrapup_global_declaration_1 (vec[i]);
828 /* Now emit any global variables or functions that we have been
829 putting off. We need to loop in case one of the things emitted
830 here references another one which comes earlier in the list. */
834 for (i = 0; i < len; i++)
835 reconsider |= wrapup_global_declaration_2 (vec[i]);
837 output_something = true;
841 return output_something;
844 /* A subroutine of check_global_declarations. Issue appropriate warnings
845 for the global declaration DECL. */
848 check_global_declaration_1 (tree decl)
850 /* Warn about any function declared static but not defined. We don't
851 warn about variables, because many programs have static variables
852 that exist only to get some text into the object file. */
853 if (TREE_CODE (decl) == FUNCTION_DECL
854 && DECL_INITIAL (decl) == 0
855 && DECL_EXTERNAL (decl)
856 && ! DECL_ARTIFICIAL (decl)
857 && ! TREE_NO_WARNING (decl)
858 && ! TREE_PUBLIC (decl)
859 && (warn_unused_function
860 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
862 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
863 pedwarn (input_location, 0, "%q+F used but never defined", decl);
865 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
866 /* This symbol is effectively an "extern" declaration now. */
867 TREE_PUBLIC (decl) = 1;
868 assemble_external (decl);
871 /* Warn about static fns or vars defined but not used. */
872 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
873 /* We don't warn about "static const" variables because the
874 "rcs_id" idiom uses that construction. */
875 || (warn_unused_variable
876 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
877 && ! DECL_IN_SYSTEM_HEADER (decl)
878 && ! TREE_USED (decl)
879 /* The TREE_USED bit for file-scope decls is kept in the identifier,
880 to handle multiple external decls in different scopes. */
881 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
882 && ! DECL_EXTERNAL (decl)
883 && ! TREE_PUBLIC (decl)
884 /* A volatile variable might be used in some non-obvious way. */
885 && ! TREE_THIS_VOLATILE (decl)
886 /* Global register variables must be declared to reserve them. */
887 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
888 /* Otherwise, ask the language. */
889 && lang_hooks.decls.warn_unused_global (decl))
890 warning ((TREE_CODE (decl) == FUNCTION_DECL)
891 ? OPT_Wunused_function
892 : OPT_Wunused_variable,
893 "%q+D defined but not used", decl);
896 /* Issue appropriate warnings for the global declarations in VEC (of
897 which there are LEN). */
900 check_global_declarations (tree *vec, int len)
904 for (i = 0; i < len; i++)
905 check_global_declaration_1 (vec[i]);
908 /* Emit debugging information for all global declarations in VEC. */
911 emit_debug_global_declarations (tree *vec, int len)
915 /* Avoid confusing the debug information machinery when there are errors. */
916 if (errorcount != 0 || sorrycount != 0)
919 timevar_push (TV_SYMOUT);
920 for (i = 0; i < len; i++)
921 debug_hooks->global_decl (vec[i]);
922 timevar_pop (TV_SYMOUT);
925 /* Warn about a use of an identifier which was marked deprecated. */
927 warn_deprecated_use (tree node, tree attr)
931 if (node == 0 || !warn_deprecated_decl)
937 attr = DECL_ATTRIBUTES (node);
938 else if (TYPE_P (node))
940 tree decl = TYPE_STUB_DECL (node);
942 attr = lookup_attribute ("deprecated",
943 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
948 attr = lookup_attribute ("deprecated", attr);
951 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
957 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
959 warning (OPT_Wdeprecated_declarations,
960 "%qD is deprecated (declared at %s:%d): %s",
961 node, xloc.file, xloc.line, msg);
963 warning (OPT_Wdeprecated_declarations,
964 "%qD is deprecated (declared at %s:%d)",
965 node, xloc.file, xloc.line);
967 else if (TYPE_P (node))
969 tree what = NULL_TREE;
970 tree decl = TYPE_STUB_DECL (node);
972 if (TYPE_NAME (node))
974 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
975 what = TYPE_NAME (node);
976 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
977 && DECL_NAME (TYPE_NAME (node)))
978 what = DECL_NAME (TYPE_NAME (node));
983 expanded_location xloc
984 = expand_location (DECL_SOURCE_LOCATION (decl));
988 warning (OPT_Wdeprecated_declarations,
989 "%qE is deprecated (declared at %s:%d): %s",
990 what, xloc.file, xloc.line, msg);
992 warning (OPT_Wdeprecated_declarations,
993 "%qE is deprecated (declared at %s:%d)", what,
994 xloc.file, xloc.line);
999 warning (OPT_Wdeprecated_declarations,
1000 "type is deprecated (declared at %s:%d): %s",
1001 xloc.file, xloc.line, msg);
1003 warning (OPT_Wdeprecated_declarations,
1004 "type is deprecated (declared at %s:%d)",
1005 xloc.file, xloc.line);
1013 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
1016 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
1021 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
1024 warning (OPT_Wdeprecated_declarations, "type is deprecated");
1030 /* Compile an entire translation unit. Write a file of assembly
1031 output and various debugging dumps. */
1036 /* Initialize yet another pass. */
1038 ggc_protect_identifiers = true;
1041 init_final (main_input_filename);
1042 coverage_init (aux_base_name);
1044 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
1046 timevar_push (TV_PARSE);
1048 /* Call the parser, which parses the entire file (calling
1049 rest_of_compilation for each function). */
1050 lang_hooks.parse_file (set_yydebug);
1052 /* Compilation is now finished except for writing
1053 what's left of the symbol table output. */
1054 timevar_pop (TV_PARSE);
1056 if (flag_syntax_only || flag_wpa)
1059 ggc_protect_identifiers = false;
1061 /* This must also call cgraph_finalize_compilation_unit. */
1062 lang_hooks.decls.final_write_globals ();
1064 if (errorcount || sorrycount)
1067 varpool_assemble_pending_decls ();
1068 finish_aliases_2 ();
1070 /* Likewise for mudflap static object registrations. */
1072 mudflap_finish_file ();
1074 /* Likewise for emulated thread-local storage. */
1075 if (!targetm.have_tls)
1078 output_shared_constant_pool ();
1079 output_object_blocks ();
1081 /* Write out any pending weak symbol declarations. */
1084 /* This must be at the end before unwind and debug info.
1085 Some target ports emit PIC setup thunks here. */
1086 targetm.asm_out.code_end ();
1088 /* Do dbx symbols. */
1089 timevar_push (TV_SYMOUT);
1091 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1092 if (dwarf2out_do_frame ())
1093 dwarf2out_frame_finish ();
1096 (*debug_hooks->finish) (main_input_filename);
1097 timevar_pop (TV_SYMOUT);
1099 /* Output some stuff at end of file if nec. */
1101 dw2_output_indirect_constants ();
1103 /* Flush any pending external directives. */
1104 process_pending_assemble_externals ();
1106 /* Emit LTO marker if LTO info has been previously emitted. This is
1107 used by collect2 to determine whether an object file contains IL.
1108 We used to emit an undefined reference here, but this produces
1109 link errors if an object file with IL is stored into a shared
1110 library without invoking lto1. */
1111 if (flag_generate_lto)
1113 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1114 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
1116 (unsigned HOST_WIDE_INT) 1, 8);
1117 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1118 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
1119 (unsigned HOST_WIDE_INT) 1, 8);
1121 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
1122 (unsigned HOST_WIDE_INT) 1,
1123 (unsigned HOST_WIDE_INT) 1);
1127 /* Attach a special .ident directive to the end of the file to identify
1128 the version of GCC which compiled this code. The format of the .ident
1129 string is patterned after the ones produced by native SVR4 compilers. */
1133 const char *pkg_version = "(GNU) ";
1135 if (strcmp ("(GCC) ", pkgversion_string))
1136 pkg_version = pkgversion_string;
1137 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1138 IDENT_ASM_OP, pkg_version, version_string);
1142 /* Invoke registered plugin callbacks. */
1143 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
1145 /* This must be at the end. Some target ports emit end of file directives
1146 into the assembly file here, and hence we can not output anything to the
1147 assembly file after this point. */
1148 targetm.asm_out.file_end ();
1151 /* Parse a -d... command line switch. */
1154 decode_d_option (const char *arg)
1165 flag_print_asm_name = 1;
1168 flag_dump_rtl_in_asm = 1;
1169 flag_print_asm_name = 1;
1172 graph_dump_format = vcg;
1175 rtl_dump_and_exit = 1;
1180 case 'D': /* These are handled by the preprocessor. */
1187 setup_core_dumping();
1190 enable_rtl_dump_file ();
1194 warning (0, "unrecognized gcc debugging option: %c", c);
1199 /* Indexed by enum debug_info_type. */
1200 const char *const debug_type_names[] =
1202 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1205 /* Print version information to FILE.
1206 Each line begins with INDENT (for the case where FILE is the
1207 assembler output file). */
1210 print_version (FILE *file, const char *indent)
1212 static const char fmt1[] =
1214 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1216 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1219 static const char fmt2[] =
1220 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1221 static const char fmt3[] =
1222 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1223 static const char fmt4[] =
1224 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1226 #define __VERSION__ "[?]"
1229 file == stderr ? _(fmt1) : fmt1,
1230 indent, *indent != 0 ? " " : "",
1231 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1232 indent, __VERSION__);
1234 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1235 two string formats, "i.j.k" and "i.j" when k is zero. As of
1236 gmp-4.3.0, GMP always uses the 3 number format. */
1237 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1238 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1239 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1240 #define GCC_GMP_VERSION \
1241 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1242 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1243 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1244 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1246 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1247 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1248 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1251 file == stderr ? _(fmt2) : fmt2,
1252 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
1253 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1255 file == stderr ? _(fmt3) : fmt3,
1256 indent, *indent != 0 ? " " : "",
1257 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1258 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1260 file == stderr ? _(fmt3) : fmt3,
1261 indent, *indent != 0 ? " " : "",
1262 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1263 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1265 file == stderr ? _(fmt3) : fmt3,
1266 indent, *indent != 0 ? " " : "",
1267 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1269 file == stderr ? _(fmt4) : fmt4,
1270 indent, *indent != 0 ? " " : "",
1271 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1273 print_plugins_versions (file, indent);
1276 #ifdef ASM_COMMENT_START
1278 print_to_asm_out_file (print_switch_type type, const char * text)
1280 bool prepend_sep = true;
1284 case SWITCH_TYPE_LINE_END:
1285 putc ('\n', asm_out_file);
1288 case SWITCH_TYPE_LINE_START:
1289 fputs (ASM_COMMENT_START, asm_out_file);
1290 return strlen (ASM_COMMENT_START);
1292 case SWITCH_TYPE_DESCRIPTIVE:
1293 if (ASM_COMMENT_START[0] == 0)
1294 prepend_sep = false;
1296 case SWITCH_TYPE_PASSED:
1297 case SWITCH_TYPE_ENABLED:
1299 fputc (' ', asm_out_file);
1300 fputs (text, asm_out_file);
1301 /* No need to return the length here as
1302 print_single_switch has already done it. */
1312 print_to_stderr (print_switch_type type, const char * text)
1316 case SWITCH_TYPE_LINE_END:
1317 putc ('\n', stderr);
1320 case SWITCH_TYPE_LINE_START:
1323 case SWITCH_TYPE_PASSED:
1324 case SWITCH_TYPE_ENABLED:
1325 fputc (' ', stderr);
1328 case SWITCH_TYPE_DESCRIPTIVE:
1329 fputs (text, stderr);
1330 /* No need to return the length here as
1331 print_single_switch has already done it. */
1339 /* Print an option value and return the adjusted position in the line.
1340 ??? print_fn doesn't handle errors, eg disk full; presumably other
1341 code will catch a disk full though. */
1344 print_single_switch (print_switch_fn_type print_fn,
1346 print_switch_type type,
1349 /* The ultrix fprintf returns 0 on success, so compute the result
1350 we want here since we need it for the following test. The +1
1351 is for the separator character that will probably be emitted. */
1352 int len = strlen (text) + 1;
1355 && pos + len > MAX_LINE)
1357 print_fn (SWITCH_TYPE_LINE_END, NULL);
1362 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1364 print_fn (type, text);
1368 /* Print active target switches using PRINT_FN.
1369 POS is the current cursor position and MAX is the size of a "line".
1370 Each line begins with INDENT and ends with TERM.
1371 Each switch is separated from the next by SEP. */
1374 print_switch_values (print_switch_fn_type print_fn)
1380 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1381 that it can be printed below. This helps reproducibility. */
1382 if (!flag_random_seed)
1383 init_random_seed ();
1385 /* Print the options as passed. */
1386 pos = print_single_switch (print_fn, pos,
1387 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1389 for (p = &save_argv[1]; *p != NULL; p++)
1394 if (strcmp (*p, "-o") == 0
1395 || strcmp (*p, "-dumpbase") == 0
1396 || strcmp (*p, "-dumpdir") == 0
1397 || strcmp (*p, "-auxbase") == 0)
1404 if (strcmp (*p, "-quiet") == 0
1405 || strcmp (*p, "-version") == 0)
1412 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1416 print_fn (SWITCH_TYPE_LINE_END, NULL);
1418 /* Print the -f and -m options that have been enabled.
1419 We don't handle language specific options but printing argv
1421 pos = print_single_switch (print_fn, 0,
1422 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1424 for (j = 0; j < cl_options_count; j++)
1425 if ((cl_options[j].flags & CL_REPORT)
1426 && option_enabled (j) > 0)
1427 pos = print_single_switch (print_fn, pos,
1428 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1430 print_fn (SWITCH_TYPE_LINE_END, NULL);
1433 /* Open assembly code output file. Do this even if -fsyntax-only is
1434 on, because then the driver will have provided the name of a
1435 temporary file or bit bucket for us. NAME is the file specified on
1436 the command line, possibly NULL. */
1438 init_asm_output (const char *name)
1440 if (name == NULL && asm_file_name == 0)
1441 asm_out_file = stdout;
1444 if (asm_file_name == 0)
1446 int len = strlen (dump_base_name);
1447 char *dumpname = XNEWVEC (char, len + 6);
1449 memcpy (dumpname, dump_base_name, len + 1);
1450 strip_off_ending (dumpname, len);
1451 strcat (dumpname, ".s");
1452 asm_file_name = dumpname;
1454 if (!strcmp (asm_file_name, "-"))
1455 asm_out_file = stdout;
1457 asm_out_file = fopen (asm_file_name, "w+b");
1458 if (asm_out_file == 0)
1459 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1462 if (!flag_syntax_only)
1464 targetm.asm_out.file_start ();
1466 if (flag_record_gcc_switches)
1468 if (targetm.asm_out.record_gcc_switches)
1470 /* Let the target know that we are about to start recording. */
1471 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1473 /* Now record the switches. */
1474 print_switch_values (targetm.asm_out.record_gcc_switches);
1475 /* Let the target know that the recording is over. */
1476 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1480 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1483 #ifdef ASM_COMMENT_START
1484 if (flag_verbose_asm)
1486 /* Print the list of switches in effect
1487 into the assembler file as comments. */
1488 print_version (asm_out_file, ASM_COMMENT_START);
1489 print_switch_values (print_to_asm_out_file);
1490 putc ('\n', asm_out_file);
1496 /* Return true if the state of option OPTION should be stored in PCH files
1497 and checked by default_pch_valid_p. Store the option's current state
1501 option_affects_pch_p (int option, struct cl_option_state *state)
1503 if ((cl_options[option].flags & CL_TARGET) == 0)
1505 if (cl_options[option].flag_var == &target_flags)
1506 if (targetm.check_pch_target_flags)
1508 return get_option_state (option, state);
1511 /* Default version of get_pch_validity.
1512 By default, every flag difference is fatal; that will be mostly right for
1513 most targets, but completely right for very few. */
1516 default_get_pch_validity (size_t *sz)
1518 struct cl_option_state state;
1523 if (targetm.check_pch_target_flags)
1524 *sz += sizeof (target_flags);
1525 for (i = 0; i < cl_options_count; i++)
1526 if (option_affects_pch_p (i, &state))
1529 result = r = XNEWVEC (char, *sz);
1533 if (targetm.check_pch_target_flags)
1535 memcpy (r, &target_flags, sizeof (target_flags));
1536 r += sizeof (target_flags);
1539 for (i = 0; i < cl_options_count; i++)
1540 if (option_affects_pch_p (i, &state))
1542 memcpy (r, state.data, state.size);
1549 /* Return a message which says that a PCH file was created with a different
1550 setting of OPTION. */
1553 pch_option_mismatch (const char *option)
1557 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1559 return _("out of memory");
1563 /* Default version of pch_valid_p. */
1566 default_pch_valid_p (const void *data_p, size_t len)
1568 struct cl_option_state state;
1569 const char *data = (const char *)data_p;
1572 /* -fpic and -fpie also usually make a PCH invalid. */
1573 if (data[0] != flag_pic)
1574 return _("created and used with different settings of -fpic");
1575 if (data[1] != flag_pie)
1576 return _("created and used with different settings of -fpie");
1579 /* Check target_flags. */
1580 if (targetm.check_pch_target_flags)
1585 memcpy (&tf, data, sizeof (target_flags));
1586 data += sizeof (target_flags);
1587 len -= sizeof (target_flags);
1588 r = targetm.check_pch_target_flags (tf);
1593 for (i = 0; i < cl_options_count; i++)
1594 if (option_affects_pch_p (i, &state))
1596 if (memcmp (data, state.data, state.size) != 0)
1597 return pch_option_mismatch (cl_options[i].opt_text);
1605 /* Default tree printer. Handles declarations only. */
1607 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
1608 int precision, bool wide, bool set_locus, bool hash)
1612 /* FUTURE: %+x should set the locus. */
1613 if (precision != 0 || wide || hash)
1619 t = va_arg (*text->args_ptr, tree);
1620 if (TREE_CODE (t) == IDENTIFIER_NODE)
1622 pp_identifier (pp, IDENTIFIER_POINTER (t));
1628 t = va_arg (*text->args_ptr, tree);
1629 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1630 t = DECL_DEBUG_EXPR (t);
1635 t = va_arg (*text->args_ptr, tree);
1639 percent_K_format (text);
1646 if (set_locus && text->locus)
1647 *text->locus = DECL_SOURCE_LOCATION (t);
1651 const char *n = DECL_NAME (t)
1652 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1657 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1662 /* A helper function; used as the reallocator function for cpp's line
1665 realloc_for_line_map (void *ptr, size_t len)
1667 return ggc_realloc (ptr, len);
1670 /* Initialization of the front end environment, before command line
1671 options are parsed. Signal handlers, internationalization etc.
1672 ARGV0 is main's argv[0]. */
1674 general_init (const char *argv0)
1678 p = argv0 + strlen (argv0);
1679 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1683 xmalloc_set_program_name (progname);
1687 /* Unlock the stdio streams. */
1688 unlock_std_streams ();
1690 gcc_init_libintl ();
1692 /* Initialize the diagnostics reporting machinery, so option parsing
1693 can give warnings and errors. */
1694 diagnostic_initialize (global_dc);
1695 diagnostic_starter (global_dc) = default_tree_diagnostic_starter;
1696 /* Set a default printer. Language specific initializations will
1697 override it later. */
1698 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1699 global_dc->show_option_requested = flag_diagnostics_show_option;
1701 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1703 signal (SIGSEGV, crash_signal);
1706 signal (SIGILL, crash_signal);
1709 signal (SIGBUS, crash_signal);
1712 signal (SIGABRT, crash_signal);
1714 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1715 signal (SIGIOT, crash_signal);
1718 signal (SIGFPE, crash_signal);
1721 /* Other host-specific signal setup. */
1722 (*host_hooks.extra_signals)();
1724 /* Initialize the garbage-collector, string pools and tree type hash
1728 line_table = GGC_NEW (struct line_maps);
1729 linemap_init (line_table);
1730 line_table->reallocator = realloc_for_line_map;
1733 /* Initialize register usage now so switches may override. */
1736 /* Register the language-independent parameters. */
1737 add_params (lang_independent_params, LAST_PARAM);
1739 /* This must be done after add_params but before argument processing. */
1740 init_ggc_heuristics();
1741 init_optimization_passes ();
1742 statistics_early_init ();
1745 /* Return true if the current target supports -fsection-anchors. */
1748 target_supports_section_anchors_p (void)
1750 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1753 if (targetm.asm_out.output_anchor == NULL)
1759 /* Default the align_* variables to 1 if they're still unset, and
1760 set up the align_*_log variables. */
1762 init_alignments (void)
1764 if (align_loops <= 0)
1766 if (align_loops_max_skip > align_loops)
1767 align_loops_max_skip = align_loops - 1;
1768 align_loops_log = floor_log2 (align_loops * 2 - 1);
1769 if (align_jumps <= 0)
1771 if (align_jumps_max_skip > align_jumps)
1772 align_jumps_max_skip = align_jumps - 1;
1773 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1774 if (align_labels <= 0)
1776 align_labels_log = floor_log2 (align_labels * 2 - 1);
1777 if (align_labels_max_skip > align_labels)
1778 align_labels_max_skip = align_labels - 1;
1779 if (align_functions <= 0)
1780 align_functions = 1;
1781 align_functions_log = floor_log2 (align_functions * 2 - 1);
1784 /* Process the options that have been parsed. */
1786 process_options (void)
1788 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1789 This can happen with incorrect pre-processed input. */
1790 debug_hooks = &do_nothing_debug_hooks;
1792 /* This replaces set_Wunused. */
1793 if (warn_unused_function == -1)
1794 warn_unused_function = warn_unused;
1795 if (warn_unused_label == -1)
1796 warn_unused_label = warn_unused;
1797 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1798 if (warn_unused_parameter == -1)
1799 warn_unused_parameter = (warn_unused && extra_warnings);
1800 if (warn_unused_variable == -1)
1801 warn_unused_variable = warn_unused;
1802 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1804 if (warn_unused_but_set_parameter == -1)
1805 warn_unused_but_set_parameter = (warn_unused && extra_warnings);
1806 if (warn_unused_but_set_variable == -1)
1807 warn_unused_but_set_variable = warn_unused;
1808 if (warn_unused_value == -1)
1809 warn_unused_value = warn_unused;
1811 /* This replaces set_Wextra. */
1812 if (warn_uninitialized == -1)
1813 warn_uninitialized = extra_warnings;
1815 /* Allow the front end to perform consistency checks and do further
1816 initialization based on the command line options. This hook also
1817 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1818 so we can correctly initialize debug output. */
1819 no_backend = lang_hooks.post_options (&main_input_filename);
1821 #ifdef OVERRIDE_OPTIONS
1822 /* Some machines may reject certain combinations of options. */
1826 /* Avoid any informative notes in the second run of -fcompare-debug. */
1827 if (flag_compare_debug)
1828 diagnostic_inhibit_notes (global_dc);
1830 if (flag_section_anchors && !target_supports_section_anchors_p ())
1832 warning (OPT_fsection_anchors,
1833 "this target does not support %qs", "-fsection-anchors");
1834 flag_section_anchors = 0;
1837 if (flag_short_enums == 2)
1838 flag_short_enums = targetm.default_short_enums ();
1840 /* Set aux_base_name if not already set. */
1843 else if (main_input_filename)
1845 char *name = xstrdup (lbasename (main_input_filename));
1847 strip_off_ending (name, strlen (name));
1848 aux_base_name = name;
1851 aux_base_name = "gccaux";
1856 || flag_loop_interchange
1857 || flag_loop_strip_mine
1858 || flag_graphite_identity
1859 || flag_loop_parallelize_all)
1860 sorry ("Graphite loop optimizations cannot be used");
1863 /* Unrolling all loops implies that standard loop unrolling must also
1865 if (flag_unroll_all_loops)
1866 flag_unroll_loops = 1;
1868 /* The loop unrolling code assumes that cse will be run after loop.
1869 web and rename-registers also help when run after loop unrolling. */
1870 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1871 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1873 if (flag_web == AUTODETECT_VALUE)
1874 flag_web = flag_unroll_loops || flag_peel_loops;
1876 if (flag_rename_registers == AUTODETECT_VALUE)
1877 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1879 if (flag_non_call_exceptions)
1880 flag_asynchronous_unwind_tables = 1;
1881 if (flag_asynchronous_unwind_tables)
1882 flag_unwind_tables = 1;
1884 if (flag_value_profile_transformations)
1885 flag_profile_values = 1;
1887 /* Warn about options that are not supported on this machine. */
1888 #ifndef INSN_SCHEDULING
1889 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1890 warning (0, "instruction scheduling not supported on this target machine");
1893 if (flag_delayed_branch)
1894 warning (0, "this target machine does not have delayed branches");
1897 user_label_prefix = USER_LABEL_PREFIX;
1898 if (flag_leading_underscore != -1)
1900 /* If the default prefix is more complicated than "" or "_",
1901 issue a warning and ignore this option. */
1902 if (user_label_prefix[0] == 0 ||
1903 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1905 user_label_prefix = flag_leading_underscore ? "_" : "";
1908 warning (0, "-f%sleading-underscore not supported on this target machine",
1909 flag_leading_underscore ? "" : "no-");
1912 /* If we are in verbose mode, write out the version and maybe all the
1913 option flags in use. */
1916 print_version (stderr, "");
1918 print_switch_values (print_to_stderr);
1921 if (flag_syntax_only)
1923 write_symbols = NO_DEBUG;
1929 if (debug_info_level == DINFO_LEVEL_NONE)
1931 debug_info_level = DINFO_LEVEL_NORMAL;
1933 if (write_symbols == NO_DEBUG)
1934 write_symbols = PREFERRED_DEBUGGING_TYPE;
1937 debug_info_level = DINFO_LEVEL_NONE;
1940 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1942 FILE *final_output = fopen (flag_dump_final_insns, "w");
1945 error ("could not open final insn dump file %qs: %s",
1946 flag_dump_final_insns, strerror (errno));
1947 flag_dump_final_insns = NULL;
1949 else if (fclose (final_output))
1951 error ("could not close zeroed insn dump file %qs: %s",
1952 flag_dump_final_insns, strerror (errno));
1953 flag_dump_final_insns = NULL;
1957 /* Unless over-ridden for the target, assume that all DWARF levels
1958 may be emitted, if DWARF2_DEBUG is selected. */
1959 if (dwarf_strict < 0)
1962 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1964 if (debug_info_level == DINFO_LEVEL_NONE)
1965 write_symbols = NO_DEBUG;
1967 if (write_symbols == NO_DEBUG)
1969 #if defined(DBX_DEBUGGING_INFO)
1970 else if (write_symbols == DBX_DEBUG)
1971 debug_hooks = &dbx_debug_hooks;
1973 #if defined(XCOFF_DEBUGGING_INFO)
1974 else if (write_symbols == XCOFF_DEBUG)
1975 debug_hooks = &xcoff_debug_hooks;
1977 #ifdef SDB_DEBUGGING_INFO
1978 else if (write_symbols == SDB_DEBUG)
1979 debug_hooks = &sdb_debug_hooks;
1981 #ifdef DWARF2_DEBUGGING_INFO
1982 else if (write_symbols == DWARF2_DEBUG)
1983 debug_hooks = &dwarf2_debug_hooks;
1985 #ifdef VMS_DEBUGGING_INFO
1986 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1987 debug_hooks = &vmsdbg_debug_hooks;
1990 error ("target system does not support the \"%s\" debug format",
1991 debug_type_names[write_symbols]);
1993 /* We know which debug output will be used so we can set flag_var_tracking
1994 and flag_var_tracking_uninit if the user has not specified them. */
1995 if (debug_info_level < DINFO_LEVEL_NORMAL
1996 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1998 if (flag_var_tracking == 1
1999 || flag_var_tracking_uninit == 1)
2001 if (debug_info_level < DINFO_LEVEL_NORMAL)
2002 warning (0, "variable tracking requested, but useless unless "
2003 "producing debug info");
2005 warning (0, "variable tracking requested, but not supported "
2006 "by this debug format");
2008 flag_var_tracking = 0;
2009 flag_var_tracking_uninit = 0;
2012 /* If the user specifically requested variable tracking with tagging
2013 uninitialized variables, we need to turn on variable tracking.
2014 (We already determined above that variable tracking is feasible.) */
2015 if (flag_var_tracking_uninit)
2016 flag_var_tracking = 1;
2018 if (flag_var_tracking == AUTODETECT_VALUE)
2019 flag_var_tracking = optimize >= 1;
2021 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
2022 flag_var_tracking_assignments = flag_var_tracking
2023 && !(flag_selective_scheduling || flag_selective_scheduling2);
2025 if (flag_var_tracking_assignments_toggle)
2026 flag_var_tracking_assignments = !flag_var_tracking_assignments;
2028 if (flag_var_tracking_assignments && !flag_var_tracking)
2029 flag_var_tracking = flag_var_tracking_assignments = -1;
2031 if (flag_var_tracking_assignments
2032 && (flag_selective_scheduling || flag_selective_scheduling2))
2033 warning (0, "var-tracking-assignments changes selective scheduling");
2035 if (flag_tree_cselim == AUTODETECT_VALUE)
2036 #ifdef HAVE_conditional_move
2037 flag_tree_cselim = 1;
2039 flag_tree_cselim = 0;
2042 /* If auxiliary info generation is desired, open the output file.
2043 This goes in the same directory as the source file--unlike
2044 all the other output files. */
2045 if (flag_gen_aux_info)
2047 aux_info_file = fopen (aux_info_file_name, "w");
2048 if (aux_info_file == 0)
2049 fatal_error ("can%'t open %s: %m", aux_info_file_name);
2052 if (! targetm.have_named_sections)
2054 if (flag_function_sections)
2056 warning (0, "-ffunction-sections not supported for this target");
2057 flag_function_sections = 0;
2059 if (flag_data_sections)
2061 warning (0, "-fdata-sections not supported for this target");
2062 flag_data_sections = 0;
2066 if (flag_function_sections && profile_flag)
2068 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2069 flag_function_sections = 0;
2072 #ifndef HAVE_prefetch
2073 if (flag_prefetch_loop_arrays)
2075 warning (0, "-fprefetch-loop-arrays not supported for this target");
2076 flag_prefetch_loop_arrays = 0;
2079 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2081 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2082 flag_prefetch_loop_arrays = 0;
2086 /* This combination of options isn't handled for i386 targets and doesn't
2087 make much sense anyway, so don't allow it. */
2088 if (flag_prefetch_loop_arrays && optimize_size)
2090 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2091 flag_prefetch_loop_arrays = 0;
2094 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2095 if (flag_signaling_nans)
2096 flag_trapping_math = 1;
2098 /* We cannot reassociate if we want traps or signed zeros. */
2099 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2101 warning (0, "-fassociative-math disabled; other options take precedence");
2102 flag_associative_math = 0;
2105 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2106 if (flag_cx_limited_range)
2107 flag_complex_method = 0;
2109 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2110 if (flag_cx_fortran_rules)
2111 flag_complex_method = 1;
2113 /* Targets must be able to place spill slots at lower addresses. If the
2114 target already uses a soft frame pointer, the transition is trivial. */
2115 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2117 warning (0, "-fstack-protector not supported for this target");
2118 flag_stack_protect = 0;
2120 if (!flag_stack_protect)
2121 warn_stack_protect = 0;
2123 /* ??? Unwind info is not correct around the CFG unless either a frame
2124 pointer is present or A_O_A is set. Fixing this requires rewriting
2125 unwind info generation to be aware of the CFG and propagating states
2127 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2128 && flag_omit_frame_pointer)
2130 warning (0, "unwind tables currently require a frame pointer "
2132 flag_omit_frame_pointer = 0;
2135 /* Save the current optimization options. */
2136 optimization_default_node = build_optimization_node ();
2137 optimization_current_node = optimization_default_node;
2140 /* This function can be called multiple times to reinitialize the compiler
2141 back end when register classes or instruction sets have changed,
2142 before each function. */
2144 backend_init_target (void)
2146 /* Initialize alignment variables. */
2149 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2150 to initialize reg_raw_mode[]. */
2153 /* This invokes target hooks to set fixed_reg[] etc, which is
2157 /* This depends on stack_pointer_rtx. */
2158 init_fake_stack_mems ();
2160 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2162 init_alias_target ();
2164 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2167 /* The following initialization functions need to generate rtl, so
2168 provide a dummy function context for them. */
2169 init_dummy_function_start ();
2171 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2172 on a mode change. */
2175 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2176 after a mode change as well. */
2177 caller_save_initialized_p = false;
2179 expand_dummy_function_end ();
2182 /* Initialize the compiler back end. This function is called only once,
2183 when starting the compiler. */
2190 init_inline_once ();
2191 init_varasm_once ();
2192 save_register_info ();
2194 /* Initialize the target-specific back end pieces. */
2196 backend_init_target ();
2199 /* Initialize excess precision settings. */
2201 init_excess_precision (void)
2203 /* Adjust excess precision handling based on the target options. If
2204 the front end cannot handle it, flag_excess_precision_cmdline
2205 will already have been set accordingly in the post_options
2207 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2208 flag_excess_precision = flag_excess_precision_cmdline;
2209 if (flag_unsafe_math_optimizations)
2210 flag_excess_precision = EXCESS_PRECISION_FAST;
2211 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2213 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2214 switch (flt_eval_method)
2218 /* Either the target acts unpredictably (-1) or has all the
2219 operations required not to have excess precision (0). */
2220 flag_excess_precision = EXCESS_PRECISION_FAST;
2224 /* In these cases, predictable excess precision makes
2228 /* Any other implementation-defined FLT_EVAL_METHOD values
2229 require the compiler to handle the associated excess
2230 precision rules in excess_precision_type. */
2236 /* Initialize things that are both lang-dependent and target-dependent.
2237 This function can be called more than once if target parameters change. */
2239 lang_dependent_init_target (void)
2241 /* This determines excess precision settings. */
2242 init_excess_precision ();
2244 /* This creates various _DECL nodes, so needs to be called after the
2245 front end is initialized. It also depends on the HAVE_xxx macros
2246 generated from the target machine description. */
2249 /* The following initialization functions need to generate rtl, so
2250 provide a dummy function context for them. */
2251 init_dummy_function_start ();
2253 /* Do the target-specific parts of expr initialization. */
2254 init_expr_target ();
2256 /* Although the actions of these functions are language-independent,
2257 they use optabs, so we cannot call them from backend_init. */
2261 expand_dummy_function_end ();
2264 /* Language-dependent initialization. Returns nonzero on success. */
2266 lang_dependent_init (const char *name)
2268 location_t save_loc = input_location;
2269 if (dump_base_name == 0)
2270 dump_base_name = name && name[0] ? name : "gccdump";
2272 /* Other front-end initialization. */
2273 input_location = BUILTINS_LOCATION;
2274 if (lang_hooks.init () == 0)
2276 input_location = save_loc;
2278 init_asm_output (name);
2280 /* This creates various _DECL nodes, so needs to be called after the
2281 front end is initialized. */
2284 /* Do the target-specific parts of the initialization. */
2285 lang_dependent_init_target ();
2287 /* If dbx symbol table desired, initialize writing it and output the
2288 predefined types. */
2289 timevar_push (TV_SYMOUT);
2291 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2292 if (dwarf2out_do_frame ())
2293 dwarf2out_frame_init ();
2296 /* Now we have the correct original filename, we can initialize
2298 (*debug_hooks->init) (name);
2300 timevar_pop (TV_SYMOUT);
2306 /* Reinitialize everything when target parameters, such as register usage,
2309 target_reinit (void)
2311 /* Reinitialize RTL backend. */
2312 backend_init_target ();
2314 /* Reinitialize lang-dependent parts. */
2315 lang_dependent_init_target ();
2319 dump_memory_report (bool final)
2321 ggc_print_statistics ();
2322 stringpool_statistics ();
2323 dump_tree_statistics ();
2324 dump_gimple_statistics ();
2325 dump_rtx_statistics ();
2326 dump_alloc_pool_statistics ();
2327 dump_bitmap_statistics ();
2328 dump_vec_loc_statistics ();
2329 dump_ggc_loc_statistics (final);
2330 dump_alias_stats (stderr);
2331 dump_pta_stats (stderr);
2334 /* Clean up: close opened files, etc. */
2339 /* Close the dump files. */
2340 if (flag_gen_aux_info)
2342 fclose (aux_info_file);
2344 unlink (aux_info_file_name);
2347 /* Close non-debugging input and output files. Take special care to note
2348 whether fclose returns an error, since the pages might still be on the
2349 buffer chain while the file is open. */
2353 if (ferror (asm_out_file) != 0)
2354 fatal_error ("error writing to %s: %m", asm_file_name);
2355 if (fclose (asm_out_file) != 0)
2356 fatal_error ("error closing %s: %m", asm_file_name);
2358 unlink_if_ordinary (asm_file_name);
2362 finish_optimization_passes ();
2367 dump_memory_report (true);
2369 /* Language-specific end of compilation actions. */
2370 lang_hooks.finish ();
2373 /* Initialize the compiler, and compile the input file. */
2377 /* Initialize timing first. The C front ends read the main file in
2378 the post_options hook, and C++ does file timings. */
2379 if (time_report || !quiet_flag || flag_detailed_statistics)
2381 timevar_start (TV_TOTAL);
2385 /* Don't do any more if an error has already occurred. */
2388 /* This must be run always, because it is needed to compute the FP
2389 predefined macros, such as __LDBL_MAX__, for targets using non
2390 default FP formats. */
2391 init_adjust_machine_modes ();
2393 /* Set up the back-end if requested. */
2397 /* Language-dependent initialization. Returns true on success. */
2398 if (lang_dependent_init (main_input_filename))
2404 /* Stop timing and print the times. */
2405 timevar_stop (TV_TOTAL);
2406 timevar_print (stderr);
2409 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2410 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2411 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2413 It is not safe to call this function more than once. */
2416 toplev_main (int argc, char **argv)
2418 expandargv (&argc, &argv);
2420 save_argv = CONST_CAST2 (const char **, char **, argv);
2422 /* Initialization of GCC's environment, and diagnostics. */
2423 general_init (argv[0]);
2425 /* Parse the options and do minimal processing; basically just
2426 enough to default flags appropriately. */
2427 decode_options (argc, CONST_CAST2 (const char **, char **, argv));
2431 initialize_plugins ();
2434 print_version (stderr, "");
2437 print_plugins_help (stderr, "");
2439 /* Exit early if we can (e.g. -help). */
2440 if (!exit_after_options)
2443 if (warningcount || errorcount)
2444 print_ignored_options ();
2445 diagnostic_finish (global_dc);
2447 /* Invoke registered plugin callbacks if any. */
2448 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2450 finalize_plugins ();
2451 if (errorcount || sorrycount)
2452 return (FATAL_EXIT_CODE);
2454 return (SUCCESS_EXIT_CODE);