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"
69 #include "dwarf2asm.h"
70 #include "integrate.h"
73 #include "langhooks.h"
74 #include "cfglayout.h"
76 #include "hosthooks.h"
80 #include "value-prof.h"
81 #include "alloc-pool.h"
82 #include "tree-mudflap.h"
83 #include "tree-pass.h"
85 #include "tree-ssa-alias.h"
88 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
89 #include "dwarf2out.h"
92 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
96 #ifdef SDB_DEBUGGING_INFO
100 #ifdef XCOFF_DEBUGGING_INFO
101 #include "xcoffout.h" /* Needed for external data
102 declarations for e.g. AIX 4.x. */
105 static void general_init (const char *);
106 static void do_compile (void);
107 static void process_options (void);
108 static void backend_init (void);
109 static int lang_dependent_init (const char *);
110 static void init_asm_output (const char *);
111 static void finalize (void);
113 static void crash_signal (int) ATTRIBUTE_NORETURN;
114 static void setup_core_dumping (void);
115 static void compile_file (void);
117 /* Nonzero to dump debug info whilst parsing (-dy option). */
118 static int set_yydebug;
120 /* True if we don't need a backend (e.g. preprocessing only). */
121 static bool no_backend;
123 /* Length of line when printing switch values. */
126 /* Name of program invoked, sans directories. */
128 const char *progname;
130 /* Copy of argument vector to toplev_main. */
131 static const char **save_argv;
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 /* Current position in real source file. */
145 location_t input_location;
147 struct line_maps *line_table;
149 /* Name to use as base of names for dump output files. */
151 const char *dump_base_name;
153 /* Directory used for dump output files. */
155 const char *dump_dir_name;
157 /* Name to use as a base for auxiliary output files. */
159 const char *aux_base_name;
161 /* Prefix for profile data files */
162 const char *profile_data_prefix;
164 /* A mask of target_flags that includes bit X if X was set or cleared
165 on the command line. */
167 int target_flags_explicit;
169 /* Debug hooks - dependent upon command line options. */
171 const struct gcc_debug_hooks *debug_hooks;
173 /* Other flags saying which kinds of debugging dump have been requested. */
175 int rtl_dump_and_exit;
176 int flag_print_asm_name;
177 enum graph_dump_types graph_dump_format;
179 /* Name for output file of assembly code, specified with -o. */
181 const char *asm_file_name;
183 /* Nonzero means do optimizations. -O.
184 Particular numeric values stand for particular amounts of optimization;
185 thus, -O2 stores 2 here. However, the optimizations beyond the basic
186 ones are not controlled directly by this variable. Instead, they are
187 controlled by individual `flag_...' variables that are defaulted
188 based on this variable. */
192 /* Nonzero means optimize for size. -Os.
193 The only valid values are zero and nonzero. When optimize_size is
194 nonzero, optimize defaults to 2, but certain individual code
195 bloating optimizations are disabled. */
197 int optimize_size = 0;
199 /* True if this is the lto front end. This is used to disable
200 gimple generation and lowering passes that are normally run on the
201 output of a front end. These passes must be bypassed for lto since
202 they have already been done before the gimple was written. */
204 bool in_lto_p = false;
206 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
208 int flag_generate_lto;
210 /* The FUNCTION_DECL for the function currently being compiled,
211 or 0 if between functions. */
212 tree current_function_decl;
214 /* Set to the FUNC_BEGIN label of the current function, or NULL
216 const char * current_function_func_begin_label;
218 /* Nonzero means to collect statistics which might be expensive
219 and to print them when we are done. */
220 int flag_detailed_statistics = 0;
222 /* A random sequence of characters, unless overridden by user. */
223 static const char *flag_random_seed;
225 /* A local time stamp derived from the time of compilation. It will be
226 zero if the system cannot provide a time. It will be -1u, if the
227 user has specified a particular random seed. */
232 /* Nonzero means `char' should be signed. */
234 int flag_signed_char;
236 /* Nonzero means give an enum type only as many bytes as it needs. A value
237 of 2 means it has not yet been initialized. */
239 int flag_short_enums;
241 /* Nonzero if structures and unions should be returned in memory.
243 This should only be defined if compatibility with another compiler or
244 with an ABI is needed, because it results in slower code. */
246 #ifndef DEFAULT_PCC_STRUCT_RETURN
247 #define DEFAULT_PCC_STRUCT_RETURN 1
250 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
252 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
254 /* 0 means straightforward implementation of complex divide acceptable.
255 1 means wide ranges of inputs must work for complex divide.
256 2 means C99-like requirements for complex multiply and divide. */
258 int flag_complex_method = 1;
260 /* Nonzero means we should be saving declaration info into a .X file. */
262 int flag_gen_aux_info = 0;
264 /* Specified name of aux-info file. */
266 const char *aux_info_file_name;
268 /* Nonzero if we are compiling code for a shared library, zero for
273 /* Generate code for GNU or NeXT Objective-C runtime environment. */
275 #ifdef NEXT_OBJC_RUNTIME
276 int flag_next_runtime = 1;
278 int flag_next_runtime = 0;
281 /* Set to the default thread-local storage (tls) model to use. */
283 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
285 /* Set the default region and algorithm for the integrated register
288 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
289 enum ira_region flag_ira_region = IRA_REGION_MIXED;
291 /* Set the default value for -fira-verbose. */
293 unsigned int flag_ira_verbose = 5;
295 /* Set the default for excess precision. */
297 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
298 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
300 /* Nonzero means change certain warnings into errors.
301 Usually these are warnings about failure to conform to some standard. */
303 int flag_pedantic_errors = 0;
305 /* Nonzero means make permerror produce warnings instead of errors. */
307 int flag_permissive = 0;
309 /* -dA causes debug commentary information to be produced in
310 the generated assembly code (to make it more readable). This option
311 is generally only of use to those who actually need to read the
312 generated assembly code (perhaps while debugging the compiler itself).
313 Currently, this switch is only used by dwarfout.c; however, it is intended
314 to be a catchall for printing debug information in the assembler file. */
316 int flag_debug_asm = 0;
318 /* -dP causes the rtl to be emitted as a comment in assembly. */
320 int flag_dump_rtl_in_asm = 0;
322 /* When non-NULL, indicates that whenever space is allocated on the
323 stack, the resulting stack pointer must not pass this
324 address---that is, for stacks that grow downward, the stack pointer
325 must always be greater than or equal to this address; for stacks
326 that grow upward, the stack pointer must be less than this address.
327 At present, the rtx may be either a REG or a SYMBOL_REF, although
328 the support provided depends on the backend. */
331 /* Positive if we should track variables, negative if we should run
332 the var-tracking pass only to discard debug annotations, zero if
333 we're not to run it. When flag_var_tracking == AUTODETECT_VALUE it
334 will be set according to optimize, debug_info_level and debug_hooks
335 in process_options (). */
336 int flag_var_tracking = AUTODETECT_VALUE;
338 /* Positive if we should track variables at assignments, negative if
339 we should run the var-tracking pass only to discard debug
340 annotations. When flag_var_tracking_assignments ==
341 AUTODETECT_VALUE it will be set according to flag_var_tracking. */
342 int flag_var_tracking_assignments = AUTODETECT_VALUE;
344 /* Nonzero if we should toggle flag_var_tracking_assignments after
345 processing options and computing its default. */
346 int flag_var_tracking_assignments_toggle = 0;
348 /* Type of stack check. */
349 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
351 /* True if the user has tagged the function with the 'section'
354 bool user_defined_section_attribute = false;
356 /* Values of the -falign-* flags: how much to align labels in code.
357 0 means `use default', 1 means `don't align'.
358 For each variable, there is an _log variant which is the power
359 of two not less than the variable, for .align output. */
362 int align_loops_max_skip;
364 int align_jumps_max_skip;
365 int align_labels_log;
366 int align_labels_max_skip;
367 int align_functions_log;
371 const char *const string;
375 lang_independent_options;
377 /* Nonzero if subexpressions must be evaluated from left-to-right. */
378 int flag_evaluation_order = 0;
380 /* The user symbol prefix after having resolved same. */
381 const char *user_label_prefix;
383 static const param_info lang_independent_params[] = {
384 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
385 { OPTION, DEFAULT, false, MIN, MAX, HELP },
386 #include "params.def"
388 { NULL, 0, false, 0, 0, NULL }
391 /* Output files for assembler code (real compiler output)
392 and debugging dumps. */
396 FILE *dump_file = NULL;
397 const char *dump_file_name;
399 /* The current working directory of a translation. It's generally the
400 directory from which compilation was initiated, but a preprocessed
401 file may specify the original directory in which it was
404 static const char *src_pwd;
406 /* Initialize src_pwd with the given string, and return true. If it
407 was already initialized, return false. As a special case, it may
408 be called with a NULL argument to test whether src_pwd has NOT been
412 set_src_pwd (const char *pwd)
416 if (strcmp (src_pwd, pwd) == 0)
422 src_pwd = xstrdup (pwd);
426 /* Return the directory from which the translation unit was initiated,
427 in case set_src_pwd() was not called before to assign it a
443 /* Called when the start of a function definition is parsed,
444 this function prints on stderr the name of the function. */
446 announce_function (tree decl)
450 if (rtl_dump_and_exit)
451 fprintf (stderr, "%s ",
452 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
454 fprintf (stderr, " %s",
455 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
457 pp_needs_newline (global_dc->printer) = true;
458 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
462 /* Initialize local_tick with the time of day, or -1 if
463 flag_random_seed is set. */
466 init_local_tick (void)
468 if (!flag_random_seed)
470 /* Get some more or less random data. */
471 #ifdef HAVE_GETTIMEOFDAY
475 gettimeofday (&tv, NULL);
476 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
480 time_t now = time (NULL);
482 if (now != (time_t)-1)
483 local_tick = (unsigned) now;
491 /* Set up a default flag_random_seed and local_tick, unless the user
492 already specified one. Must be called after init_local_tick. */
495 init_random_seed (void)
497 unsigned HOST_WIDE_INT value;
498 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
500 value = local_tick ^ getpid ();
502 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
503 flag_random_seed = random_seed;
506 /* Obtain the random_seed string. Unless NOINIT, initialize it if
507 it's not provided in the command line. */
510 get_random_seed (bool noinit)
512 if (!flag_random_seed && !noinit)
514 return flag_random_seed;
517 /* Modify the random_seed string to VAL. Return its previous
521 set_random_seed (const char *val)
523 const char *old = flag_random_seed;
524 flag_random_seed = val;
528 /* Decode the string P as an integral parameter.
529 If the string is indeed an integer return its numeric value else
530 issue an Invalid Option error for the option PNAME and return DEFVAL.
531 If PNAME is zero just return DEFVAL, do not call error. */
534 read_integral_parameter (const char *p, const char *pname, const int defval)
536 const char *endp = p;
549 error ("invalid option argument %qs", pname);
556 #if GCC_VERSION < 3004
558 /* The functions floor_log2 and exact_log2 are defined as inline
559 functions in toplev.h if GCC_VERSION >= 3004. The definitions here
560 are used for older versions of gcc. */
562 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
563 If X is 0, return -1. */
566 floor_log2 (unsigned HOST_WIDE_INT x)
573 if (HOST_BITS_PER_WIDE_INT > 64)
574 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
576 if (HOST_BITS_PER_WIDE_INT > 32)
577 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
579 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
581 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
583 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
585 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
587 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
593 /* Return the logarithm of X, base 2, considering X unsigned,
594 if X is a power of 2. Otherwise, returns -1. */
597 exact_log2 (unsigned HOST_WIDE_INT x)
601 return floor_log2 (x);
604 #endif /* GCC_VERSION < 3004 */
606 /* Handler for fatal signals, such as SIGSEGV. These are transformed
607 into ICE messages, which is much more user friendly. In case the
608 error printer crashes, reset the signal to prevent infinite recursion. */
611 crash_signal (int signo)
613 signal (signo, SIG_DFL);
615 /* If we crashed while processing an ASM statement, then be a little more
616 graceful. It's most likely the user's fault. */
617 if (this_is_asm_operands)
619 output_operand_lossage ("unrecoverable error");
620 exit (FATAL_EXIT_CODE);
623 internal_error ("%s", strsignal (signo));
626 /* Arrange to dump core on error. (The regular error message is still
627 printed first, except in the case of abort().) */
630 setup_core_dumping (void)
633 signal (SIGABRT, SIG_DFL);
635 #if defined(HAVE_SETRLIMIT)
638 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
639 fatal_error ("getting core file size maximum limit: %m");
640 rlim.rlim_cur = rlim.rlim_max;
641 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
642 fatal_error ("setting core file size limit to maximum: %m");
645 diagnostic_abort_on_error (global_dc);
649 /* Strip off a legitimate source ending from the input string NAME of
650 length LEN. Rather than having to know the names used by all of
651 our front ends, we strip off an ending of a period followed by
652 up to five characters. (Java uses ".class".) */
655 strip_off_ending (char *name, int len)
658 for (i = 2; i < 6 && len > i; i++)
660 if (name[len - i] == '.')
662 name[len - i] = '\0';
668 /* Output a quoted string. */
671 output_quoted_string (FILE *asm_file, const char *string)
673 #ifdef OUTPUT_QUOTED_STRING
674 OUTPUT_QUOTED_STRING (asm_file, string);
678 putc ('\"', asm_file);
679 while ((c = *string++) != 0)
683 if (c == '\"' || c == '\\')
684 putc ('\\', asm_file);
688 fprintf (asm_file, "\\%03o", (unsigned char) c);
690 putc ('\"', asm_file);
694 /* Output a file name in the form wanted by System V. */
697 output_file_directive (FILE *asm_file, const char *input_name)
702 if (input_name == NULL)
703 input_name = "<stdin>";
705 input_name = remap_debug_filename (input_name);
707 len = strlen (input_name);
708 na = input_name + len;
710 /* NA gets INPUT_NAME sans directory names. */
711 while (na > input_name)
713 if (IS_DIR_SEPARATOR (na[-1]))
718 #ifdef ASM_OUTPUT_SOURCE_FILENAME
719 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
721 fprintf (asm_file, "\t.file\t");
722 output_quoted_string (asm_file, na);
723 putc ('\n', asm_file);
727 /* A subroutine of wrapup_global_declarations. We've come to the end of
728 the compilation unit. All deferred variables should be undeferred,
729 and all incomplete decls should be finalized. */
732 wrapup_global_declaration_1 (tree decl)
734 /* We're not deferring this any longer. Assignment is conditional to
735 avoid needlessly dirtying PCH pages. */
736 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
737 && DECL_DEFER_OUTPUT (decl) != 0)
738 DECL_DEFER_OUTPUT (decl) = 0;
740 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
741 lang_hooks.finish_incomplete_decl (decl);
744 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
745 needs to be output. Return true if it is output. */
748 wrapup_global_declaration_2 (tree decl)
750 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
753 /* Don't write out static consts, unless we still need them.
755 We also keep static consts if not optimizing (for debugging),
756 unless the user specified -fno-keep-static-consts.
757 ??? They might be better written into the debug information.
758 This is possible when using DWARF.
760 A language processor that wants static constants to be always
761 written out (even if it is not used) is responsible for
762 calling rest_of_decl_compilation itself. E.g. the C front-end
763 calls rest_of_decl_compilation from finish_decl.
764 One motivation for this is that is conventional in some
765 environments to write things like:
766 static const char rcsid[] = "... version string ...";
767 intending to force the string to be in the executable.
769 A language processor that would prefer to have unneeded
770 static constants "optimized away" would just defer writing
771 them out until here. E.g. C++ does this, because static
772 constants are often defined in header files.
774 ??? A tempting alternative (for both C and C++) would be
775 to force a constant to be written if and only if it is
776 defined in a main file, as opposed to an include file. */
778 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
780 struct varpool_node *node;
782 node = varpool_node (decl);
786 else if (node->alias)
788 else if (!cgraph_global_info_ready
790 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
792 else if (node->needed)
794 else if (DECL_COMDAT (decl))
796 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
797 && (optimize || !flag_keep_static_consts
798 || DECL_ARTIFICIAL (decl)))
803 rest_of_decl_compilation (decl, 1, 1);
811 /* Do any final processing required for the declarations in VEC, of
812 which there are LEN. We write out inline functions and variables
813 that have been deferred until this point, but which are required.
814 Returns nonzero if anything was put out. */
817 wrapup_global_declarations (tree *vec, int len)
819 bool reconsider, output_something = false;
822 for (i = 0; i < len; i++)
823 wrapup_global_declaration_1 (vec[i]);
825 /* Now emit any global variables or functions that we have been
826 putting off. We need to loop in case one of the things emitted
827 here references another one which comes earlier in the list. */
831 for (i = 0; i < len; i++)
832 reconsider |= wrapup_global_declaration_2 (vec[i]);
834 output_something = true;
838 return output_something;
841 /* A subroutine of check_global_declarations. Issue appropriate warnings
842 for the global declaration DECL. */
845 check_global_declaration_1 (tree decl)
847 /* Warn about any function declared static but not defined. We don't
848 warn about variables, because many programs have static variables
849 that exist only to get some text into the object file. */
850 if (TREE_CODE (decl) == FUNCTION_DECL
851 && DECL_INITIAL (decl) == 0
852 && DECL_EXTERNAL (decl)
853 && ! DECL_ARTIFICIAL (decl)
854 && ! TREE_NO_WARNING (decl)
855 && ! TREE_PUBLIC (decl)
856 && (warn_unused_function
857 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
859 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
860 pedwarn (input_location, 0, "%q+F used but never defined", decl);
862 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
863 /* This symbol is effectively an "extern" declaration now. */
864 TREE_PUBLIC (decl) = 1;
865 assemble_external (decl);
868 /* Warn about static fns or vars defined but not used. */
869 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
870 /* We don't warn about "static const" variables because the
871 "rcs_id" idiom uses that construction. */
872 || (warn_unused_variable
873 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
874 && ! DECL_IN_SYSTEM_HEADER (decl)
875 && ! TREE_USED (decl)
876 /* The TREE_USED bit for file-scope decls is kept in the identifier,
877 to handle multiple external decls in different scopes. */
878 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
879 && ! DECL_EXTERNAL (decl)
880 && ! TREE_PUBLIC (decl)
881 /* A volatile variable might be used in some non-obvious way. */
882 && ! TREE_THIS_VOLATILE (decl)
883 /* Global register variables must be declared to reserve them. */
884 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
885 /* Otherwise, ask the language. */
886 && lang_hooks.decls.warn_unused_global (decl))
887 warning ((TREE_CODE (decl) == FUNCTION_DECL)
888 ? OPT_Wunused_function
889 : OPT_Wunused_variable,
890 "%q+D defined but not used", decl);
893 /* Issue appropriate warnings for the global declarations in VEC (of
894 which there are LEN). */
897 check_global_declarations (tree *vec, int len)
901 for (i = 0; i < len; i++)
902 check_global_declaration_1 (vec[i]);
905 /* Emit debugging information for all global declarations in VEC. */
908 emit_debug_global_declarations (tree *vec, int len)
912 /* Avoid confusing the debug information machinery when there are errors. */
913 if (errorcount != 0 || sorrycount != 0)
916 timevar_push (TV_SYMOUT);
917 for (i = 0; i < len; i++)
918 debug_hooks->global_decl (vec[i]);
919 timevar_pop (TV_SYMOUT);
922 /* Warn about a use of an identifier which was marked deprecated. */
924 warn_deprecated_use (tree node, tree attr)
928 if (node == 0 || !warn_deprecated_decl)
934 attr = DECL_ATTRIBUTES (node);
935 else if (TYPE_P (node))
937 tree decl = TYPE_STUB_DECL (node);
939 attr = lookup_attribute ("deprecated",
940 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
945 attr = lookup_attribute ("deprecated", attr);
948 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
954 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
956 warning (OPT_Wdeprecated_declarations,
957 "%qD is deprecated (declared at %s:%d): %s",
958 node, xloc.file, xloc.line, msg);
960 warning (OPT_Wdeprecated_declarations,
961 "%qD is deprecated (declared at %s:%d)",
962 node, xloc.file, xloc.line);
964 else if (TYPE_P (node))
966 tree what = NULL_TREE;
967 tree decl = TYPE_STUB_DECL (node);
969 if (TYPE_NAME (node))
971 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
972 what = TYPE_NAME (node);
973 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
974 && DECL_NAME (TYPE_NAME (node)))
975 what = DECL_NAME (TYPE_NAME (node));
980 expanded_location xloc
981 = expand_location (DECL_SOURCE_LOCATION (decl));
985 warning (OPT_Wdeprecated_declarations,
986 "%qE is deprecated (declared at %s:%d): %s",
987 what, xloc.file, xloc.line, msg);
989 warning (OPT_Wdeprecated_declarations,
990 "%qE is deprecated (declared at %s:%d)", what,
991 xloc.file, xloc.line);
996 warning (OPT_Wdeprecated_declarations,
997 "type is deprecated (declared at %s:%d): %s",
998 xloc.file, xloc.line, msg);
1000 warning (OPT_Wdeprecated_declarations,
1001 "type is deprecated (declared at %s:%d)",
1002 xloc.file, xloc.line);
1010 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
1013 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
1018 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
1021 warning (OPT_Wdeprecated_declarations, "type is deprecated");
1027 /* Compile an entire translation unit. Write a file of assembly
1028 output and various debugging dumps. */
1033 /* Initialize yet another pass. */
1035 ggc_protect_identifiers = true;
1038 init_final (main_input_filename);
1039 coverage_init (aux_base_name);
1041 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
1043 timevar_push (TV_PARSE);
1045 /* Call the parser, which parses the entire file (calling
1046 rest_of_compilation for each function). */
1047 lang_hooks.parse_file (set_yydebug);
1049 /* Compilation is now finished except for writing
1050 what's left of the symbol table output. */
1051 timevar_pop (TV_PARSE);
1053 if (flag_syntax_only || flag_wpa)
1056 ggc_protect_identifiers = false;
1058 /* This must also call cgraph_finalize_compilation_unit. */
1059 lang_hooks.decls.final_write_globals ();
1061 if (errorcount || sorrycount)
1064 varpool_assemble_pending_decls ();
1065 finish_aliases_2 ();
1067 /* Likewise for mudflap static object registrations. */
1069 mudflap_finish_file ();
1071 /* Likewise for emulated thread-local storage. */
1072 if (!targetm.have_tls)
1075 output_shared_constant_pool ();
1076 output_object_blocks ();
1078 /* Write out any pending weak symbol declarations. */
1081 /* This must be at the end before unwind and debug info.
1082 Some target ports emit PIC setup thunks here. */
1083 targetm.asm_out.code_end ();
1085 /* Do dbx symbols. */
1086 timevar_push (TV_SYMOUT);
1088 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1089 if (dwarf2out_do_frame ())
1090 dwarf2out_frame_finish ();
1093 (*debug_hooks->finish) (main_input_filename);
1094 timevar_pop (TV_SYMOUT);
1096 /* Output some stuff at end of file if nec. */
1098 dw2_output_indirect_constants ();
1100 /* Flush any pending external directives. */
1101 process_pending_assemble_externals ();
1103 /* Emit LTO marker if LTO info has been previously emitted. This is
1104 used by collect2 to determine whether an object file contains IL.
1105 We used to emit an undefined reference here, but this produces
1106 link errors if an object file with IL is stored into a shared
1107 library without invoking lto1. */
1108 if (flag_generate_lto)
1110 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1111 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
1113 (unsigned HOST_WIDE_INT) 1, 8);
1114 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1115 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
1116 (unsigned HOST_WIDE_INT) 1, 8);
1118 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
1119 (unsigned HOST_WIDE_INT) 1,
1120 (unsigned HOST_WIDE_INT) 1);
1124 /* Attach a special .ident directive to the end of the file to identify
1125 the version of GCC which compiled this code. The format of the .ident
1126 string is patterned after the ones produced by native SVR4 compilers. */
1130 const char *pkg_version = "(GNU) ";
1132 if (strcmp ("(GCC) ", pkgversion_string))
1133 pkg_version = pkgversion_string;
1134 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1135 IDENT_ASM_OP, pkg_version, version_string);
1139 /* Invoke registered plugin callbacks. */
1140 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
1142 /* This must be at the end. Some target ports emit end of file directives
1143 into the assembly file here, and hence we can not output anything to the
1144 assembly file after this point. */
1145 targetm.asm_out.file_end ();
1148 /* Parse a -d... command line switch. */
1151 decode_d_option (const char *arg)
1162 flag_print_asm_name = 1;
1165 flag_dump_rtl_in_asm = 1;
1166 flag_print_asm_name = 1;
1169 graph_dump_format = vcg;
1172 rtl_dump_and_exit = 1;
1177 case 'D': /* These are handled by the preprocessor. */
1184 setup_core_dumping();
1187 enable_rtl_dump_file ();
1191 warning (0, "unrecognized gcc debugging option: %c", c);
1196 /* Indexed by enum debug_info_type. */
1197 const char *const debug_type_names[] =
1199 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1202 /* Print version information to FILE.
1203 Each line begins with INDENT (for the case where FILE is the
1204 assembler output file). */
1207 print_version (FILE *file, const char *indent)
1209 static const char fmt1[] =
1211 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1213 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1216 static const char fmt2[] =
1217 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1218 static const char fmt3[] =
1219 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1220 static const char fmt4[] =
1221 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1223 #define __VERSION__ "[?]"
1226 file == stderr ? _(fmt1) : fmt1,
1227 indent, *indent != 0 ? " " : "",
1228 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1229 indent, __VERSION__);
1231 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1232 two string formats, "i.j.k" and "i.j" when k is zero. As of
1233 gmp-4.3.0, GMP always uses the 3 number format. */
1234 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1235 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1236 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1237 #define GCC_GMP_VERSION \
1238 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1239 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1240 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1241 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1243 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1244 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1245 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1248 file == stderr ? _(fmt2) : fmt2,
1249 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
1250 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1252 file == stderr ? _(fmt3) : fmt3,
1253 indent, *indent != 0 ? " " : "",
1254 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1255 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1257 file == stderr ? _(fmt3) : fmt3,
1258 indent, *indent != 0 ? " " : "",
1259 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1260 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1262 file == stderr ? _(fmt3) : fmt3,
1263 indent, *indent != 0 ? " " : "",
1264 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1266 file == stderr ? _(fmt4) : fmt4,
1267 indent, *indent != 0 ? " " : "",
1268 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1270 print_plugins_versions (file, indent);
1273 #ifdef ASM_COMMENT_START
1275 print_to_asm_out_file (print_switch_type type, const char * text)
1277 bool prepend_sep = true;
1281 case SWITCH_TYPE_LINE_END:
1282 putc ('\n', asm_out_file);
1285 case SWITCH_TYPE_LINE_START:
1286 fputs (ASM_COMMENT_START, asm_out_file);
1287 return strlen (ASM_COMMENT_START);
1289 case SWITCH_TYPE_DESCRIPTIVE:
1290 if (ASM_COMMENT_START[0] == 0)
1291 prepend_sep = false;
1293 case SWITCH_TYPE_PASSED:
1294 case SWITCH_TYPE_ENABLED:
1296 fputc (' ', asm_out_file);
1297 fputs (text, asm_out_file);
1298 /* No need to return the length here as
1299 print_single_switch has already done it. */
1309 print_to_stderr (print_switch_type type, const char * text)
1313 case SWITCH_TYPE_LINE_END:
1314 putc ('\n', stderr);
1317 case SWITCH_TYPE_LINE_START:
1320 case SWITCH_TYPE_PASSED:
1321 case SWITCH_TYPE_ENABLED:
1322 fputc (' ', stderr);
1325 case SWITCH_TYPE_DESCRIPTIVE:
1326 fputs (text, stderr);
1327 /* No need to return the length here as
1328 print_single_switch has already done it. */
1336 /* Print an option value and return the adjusted position in the line.
1337 ??? print_fn doesn't handle errors, eg disk full; presumably other
1338 code will catch a disk full though. */
1341 print_single_switch (print_switch_fn_type print_fn,
1343 print_switch_type type,
1346 /* The ultrix fprintf returns 0 on success, so compute the result
1347 we want here since we need it for the following test. The +1
1348 is for the separator character that will probably be emitted. */
1349 int len = strlen (text) + 1;
1352 && pos + len > MAX_LINE)
1354 print_fn (SWITCH_TYPE_LINE_END, NULL);
1359 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1361 print_fn (type, text);
1365 /* Print active target switches using PRINT_FN.
1366 POS is the current cursor position and MAX is the size of a "line".
1367 Each line begins with INDENT and ends with TERM.
1368 Each switch is separated from the next by SEP. */
1371 print_switch_values (print_switch_fn_type print_fn)
1377 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1378 that it can be printed below. This helps reproducibility. */
1379 if (!flag_random_seed)
1380 init_random_seed ();
1382 /* Print the options as passed. */
1383 pos = print_single_switch (print_fn, pos,
1384 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1386 for (p = &save_argv[1]; *p != NULL; p++)
1391 if (strcmp (*p, "-o") == 0
1392 || strcmp (*p, "-dumpbase") == 0
1393 || strcmp (*p, "-dumpdir") == 0
1394 || strcmp (*p, "-auxbase") == 0)
1401 if (strcmp (*p, "-quiet") == 0
1402 || strcmp (*p, "-version") == 0)
1409 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1413 print_fn (SWITCH_TYPE_LINE_END, NULL);
1415 /* Print the -f and -m options that have been enabled.
1416 We don't handle language specific options but printing argv
1418 pos = print_single_switch (print_fn, 0,
1419 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1421 for (j = 0; j < cl_options_count; j++)
1422 if ((cl_options[j].flags & CL_REPORT)
1423 && option_enabled (j) > 0)
1424 pos = print_single_switch (print_fn, pos,
1425 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1427 print_fn (SWITCH_TYPE_LINE_END, NULL);
1430 /* Open assembly code output file. Do this even if -fsyntax-only is
1431 on, because then the driver will have provided the name of a
1432 temporary file or bit bucket for us. NAME is the file specified on
1433 the command line, possibly NULL. */
1435 init_asm_output (const char *name)
1437 if (name == NULL && asm_file_name == 0)
1438 asm_out_file = stdout;
1441 if (asm_file_name == 0)
1443 int len = strlen (dump_base_name);
1444 char *dumpname = XNEWVEC (char, len + 6);
1446 memcpy (dumpname, dump_base_name, len + 1);
1447 strip_off_ending (dumpname, len);
1448 strcat (dumpname, ".s");
1449 asm_file_name = dumpname;
1451 if (!strcmp (asm_file_name, "-"))
1452 asm_out_file = stdout;
1454 asm_out_file = fopen (asm_file_name, "w+b");
1455 if (asm_out_file == 0)
1456 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1459 if (!flag_syntax_only)
1461 targetm.asm_out.file_start ();
1463 if (flag_record_gcc_switches)
1465 if (targetm.asm_out.record_gcc_switches)
1467 /* Let the target know that we are about to start recording. */
1468 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1470 /* Now record the switches. */
1471 print_switch_values (targetm.asm_out.record_gcc_switches);
1472 /* Let the target know that the recording is over. */
1473 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1477 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1480 #ifdef ASM_COMMENT_START
1481 if (flag_verbose_asm)
1483 /* Print the list of switches in effect
1484 into the assembler file as comments. */
1485 print_version (asm_out_file, ASM_COMMENT_START);
1486 print_switch_values (print_to_asm_out_file);
1487 putc ('\n', asm_out_file);
1493 /* Return true if the state of option OPTION should be stored in PCH files
1494 and checked by default_pch_valid_p. Store the option's current state
1498 option_affects_pch_p (int option, struct cl_option_state *state)
1500 if ((cl_options[option].flags & CL_TARGET) == 0)
1502 if (cl_options[option].flag_var == &target_flags)
1503 if (targetm.check_pch_target_flags)
1505 return get_option_state (option, state);
1508 /* Default version of get_pch_validity.
1509 By default, every flag difference is fatal; that will be mostly right for
1510 most targets, but completely right for very few. */
1513 default_get_pch_validity (size_t *sz)
1515 struct cl_option_state state;
1520 if (targetm.check_pch_target_flags)
1521 *sz += sizeof (target_flags);
1522 for (i = 0; i < cl_options_count; i++)
1523 if (option_affects_pch_p (i, &state))
1526 result = r = XNEWVEC (char, *sz);
1530 if (targetm.check_pch_target_flags)
1532 memcpy (r, &target_flags, sizeof (target_flags));
1533 r += sizeof (target_flags);
1536 for (i = 0; i < cl_options_count; i++)
1537 if (option_affects_pch_p (i, &state))
1539 memcpy (r, state.data, state.size);
1546 /* Return a message which says that a PCH file was created with a different
1547 setting of OPTION. */
1550 pch_option_mismatch (const char *option)
1554 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1556 return _("out of memory");
1560 /* Default version of pch_valid_p. */
1563 default_pch_valid_p (const void *data_p, size_t len)
1565 struct cl_option_state state;
1566 const char *data = (const char *)data_p;
1569 /* -fpic and -fpie also usually make a PCH invalid. */
1570 if (data[0] != flag_pic)
1571 return _("created and used with different settings of -fpic");
1572 if (data[1] != flag_pie)
1573 return _("created and used with different settings of -fpie");
1576 /* Check target_flags. */
1577 if (targetm.check_pch_target_flags)
1582 memcpy (&tf, data, sizeof (target_flags));
1583 data += sizeof (target_flags);
1584 len -= sizeof (target_flags);
1585 r = targetm.check_pch_target_flags (tf);
1590 for (i = 0; i < cl_options_count; i++)
1591 if (option_affects_pch_p (i, &state))
1593 if (memcmp (data, state.data, state.size) != 0)
1594 return pch_option_mismatch (cl_options[i].opt_text);
1602 /* Default tree printer. Handles declarations only. */
1604 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
1605 int precision, bool wide, bool set_locus, bool hash)
1609 /* FUTURE: %+x should set the locus. */
1610 if (precision != 0 || wide || hash)
1616 t = va_arg (*text->args_ptr, tree);
1617 if (TREE_CODE (t) == IDENTIFIER_NODE)
1619 pp_identifier (pp, IDENTIFIER_POINTER (t));
1625 t = va_arg (*text->args_ptr, tree);
1626 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1627 t = DECL_DEBUG_EXPR (t);
1632 t = va_arg (*text->args_ptr, tree);
1639 if (set_locus && text->locus)
1640 *text->locus = DECL_SOURCE_LOCATION (t);
1644 const char *n = DECL_NAME (t)
1645 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1650 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1655 /* A helper function; used as the reallocator function for cpp's line
1658 realloc_for_line_map (void *ptr, size_t len)
1660 return ggc_realloc (ptr, len);
1663 /* Initialization of the front end environment, before command line
1664 options are parsed. Signal handlers, internationalization etc.
1665 ARGV0 is main's argv[0]. */
1667 general_init (const char *argv0)
1671 p = argv0 + strlen (argv0);
1672 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1676 xmalloc_set_program_name (progname);
1680 /* Unlock the stdio streams. */
1681 unlock_std_streams ();
1683 gcc_init_libintl ();
1685 /* Initialize the diagnostics reporting machinery, so option parsing
1686 can give warnings and errors. */
1687 diagnostic_initialize (global_dc);
1688 /* Set a default printer. Language specific initializations will
1689 override it later. */
1690 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1691 global_dc->show_option_requested = flag_diagnostics_show_option;
1693 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1695 signal (SIGSEGV, crash_signal);
1698 signal (SIGILL, crash_signal);
1701 signal (SIGBUS, crash_signal);
1704 signal (SIGABRT, crash_signal);
1706 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1707 signal (SIGIOT, crash_signal);
1710 signal (SIGFPE, crash_signal);
1713 /* Other host-specific signal setup. */
1714 (*host_hooks.extra_signals)();
1716 /* Initialize the garbage-collector, string pools and tree type hash
1720 line_table = GGC_NEW (struct line_maps);
1721 linemap_init (line_table);
1722 line_table->reallocator = realloc_for_line_map;
1725 /* Initialize register usage now so switches may override. */
1728 /* Register the language-independent parameters. */
1729 add_params (lang_independent_params, LAST_PARAM);
1731 /* This must be done after add_params but before argument processing. */
1732 init_ggc_heuristics();
1733 init_optimization_passes ();
1734 statistics_early_init ();
1737 /* Return true if the current target supports -fsection-anchors. */
1740 target_supports_section_anchors_p (void)
1742 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1745 if (targetm.asm_out.output_anchor == NULL)
1751 /* Default the align_* variables to 1 if they're still unset, and
1752 set up the align_*_log variables. */
1754 init_alignments (void)
1756 if (align_loops <= 0)
1758 if (align_loops_max_skip > align_loops)
1759 align_loops_max_skip = align_loops - 1;
1760 align_loops_log = floor_log2 (align_loops * 2 - 1);
1761 if (align_jumps <= 0)
1763 if (align_jumps_max_skip > align_jumps)
1764 align_jumps_max_skip = align_jumps - 1;
1765 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1766 if (align_labels <= 0)
1768 align_labels_log = floor_log2 (align_labels * 2 - 1);
1769 if (align_labels_max_skip > align_labels)
1770 align_labels_max_skip = align_labels - 1;
1771 if (align_functions <= 0)
1772 align_functions = 1;
1773 align_functions_log = floor_log2 (align_functions * 2 - 1);
1776 /* Process the options that have been parsed. */
1778 process_options (void)
1780 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1781 This can happen with incorrect pre-processed input. */
1782 debug_hooks = &do_nothing_debug_hooks;
1784 /* This replaces set_Wunused. */
1785 if (warn_unused_function == -1)
1786 warn_unused_function = warn_unused;
1787 if (warn_unused_label == -1)
1788 warn_unused_label = warn_unused;
1789 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1790 if (warn_unused_parameter == -1)
1791 warn_unused_parameter = (warn_unused && extra_warnings);
1792 if (warn_unused_variable == -1)
1793 warn_unused_variable = warn_unused;
1794 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1796 if (warn_unused_but_set_parameter == -1)
1797 warn_unused_but_set_parameter = (warn_unused && extra_warnings);
1798 if (warn_unused_but_set_variable == -1)
1799 warn_unused_but_set_variable = warn_unused;
1800 if (warn_unused_value == -1)
1801 warn_unused_value = warn_unused;
1803 /* This replaces set_Wextra. */
1804 if (warn_uninitialized == -1)
1805 warn_uninitialized = extra_warnings;
1807 /* Allow the front end to perform consistency checks and do further
1808 initialization based on the command line options. This hook also
1809 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1810 so we can correctly initialize debug output. */
1811 no_backend = lang_hooks.post_options (&main_input_filename);
1813 #ifdef OVERRIDE_OPTIONS
1814 /* Some machines may reject certain combinations of options. */
1818 /* Avoid any informative notes in the second run of -fcompare-debug. */
1819 if (flag_compare_debug)
1820 diagnostic_inhibit_notes (global_dc);
1822 if (flag_section_anchors && !target_supports_section_anchors_p ())
1824 warning (OPT_fsection_anchors,
1825 "this target does not support %qs", "-fsection-anchors");
1826 flag_section_anchors = 0;
1829 if (flag_short_enums == 2)
1830 flag_short_enums = targetm.default_short_enums ();
1832 /* Set aux_base_name if not already set. */
1835 else if (main_input_filename)
1837 char *name = xstrdup (lbasename (main_input_filename));
1839 strip_off_ending (name, strlen (name));
1840 aux_base_name = name;
1843 aux_base_name = "gccaux";
1848 || flag_loop_interchange
1849 || flag_loop_strip_mine
1850 || flag_graphite_identity
1851 || flag_loop_parallelize_all)
1852 sorry ("Graphite loop optimizations cannot be used");
1855 /* Unrolling all loops implies that standard loop unrolling must also
1857 if (flag_unroll_all_loops)
1858 flag_unroll_loops = 1;
1860 /* The loop unrolling code assumes that cse will be run after loop.
1861 web and rename-registers also help when run after loop unrolling. */
1862 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1863 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1865 if (flag_web == AUTODETECT_VALUE)
1866 flag_web = flag_unroll_loops || flag_peel_loops;
1868 if (flag_rename_registers == AUTODETECT_VALUE)
1869 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1871 if (flag_non_call_exceptions)
1872 flag_asynchronous_unwind_tables = 1;
1873 if (flag_asynchronous_unwind_tables)
1874 flag_unwind_tables = 1;
1876 if (flag_value_profile_transformations)
1877 flag_profile_values = 1;
1879 /* Warn about options that are not supported on this machine. */
1880 #ifndef INSN_SCHEDULING
1881 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1882 warning (0, "instruction scheduling not supported on this target machine");
1885 if (flag_delayed_branch)
1886 warning (0, "this target machine does not have delayed branches");
1889 user_label_prefix = USER_LABEL_PREFIX;
1890 if (flag_leading_underscore != -1)
1892 /* If the default prefix is more complicated than "" or "_",
1893 issue a warning and ignore this option. */
1894 if (user_label_prefix[0] == 0 ||
1895 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1897 user_label_prefix = flag_leading_underscore ? "_" : "";
1900 warning (0, "-f%sleading-underscore not supported on this target machine",
1901 flag_leading_underscore ? "" : "no-");
1904 /* If we are in verbose mode, write out the version and maybe all the
1905 option flags in use. */
1908 print_version (stderr, "");
1910 print_switch_values (print_to_stderr);
1913 if (flag_syntax_only)
1915 write_symbols = NO_DEBUG;
1921 if (debug_info_level == DINFO_LEVEL_NONE)
1923 debug_info_level = DINFO_LEVEL_NORMAL;
1925 if (write_symbols == NO_DEBUG)
1926 write_symbols = PREFERRED_DEBUGGING_TYPE;
1929 debug_info_level = DINFO_LEVEL_NONE;
1932 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1934 FILE *final_output = fopen (flag_dump_final_insns, "w");
1937 error ("could not open final insn dump file %qs: %s",
1938 flag_dump_final_insns, strerror (errno));
1939 flag_dump_final_insns = NULL;
1941 else if (fclose (final_output))
1943 error ("could not close zeroed insn dump file %qs: %s",
1944 flag_dump_final_insns, strerror (errno));
1945 flag_dump_final_insns = NULL;
1949 /* Unless over-ridden for the target, assume that all DWARF levels
1950 may be emitted, if DWARF2_DEBUG is selected. */
1951 if (dwarf_strict < 0)
1954 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1956 if (debug_info_level == DINFO_LEVEL_NONE)
1957 write_symbols = NO_DEBUG;
1959 if (write_symbols == NO_DEBUG)
1961 #if defined(DBX_DEBUGGING_INFO)
1962 else if (write_symbols == DBX_DEBUG)
1963 debug_hooks = &dbx_debug_hooks;
1965 #if defined(XCOFF_DEBUGGING_INFO)
1966 else if (write_symbols == XCOFF_DEBUG)
1967 debug_hooks = &xcoff_debug_hooks;
1969 #ifdef SDB_DEBUGGING_INFO
1970 else if (write_symbols == SDB_DEBUG)
1971 debug_hooks = &sdb_debug_hooks;
1973 #ifdef DWARF2_DEBUGGING_INFO
1974 else if (write_symbols == DWARF2_DEBUG)
1975 debug_hooks = &dwarf2_debug_hooks;
1977 #ifdef VMS_DEBUGGING_INFO
1978 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1979 debug_hooks = &vmsdbg_debug_hooks;
1982 error ("target system does not support the \"%s\" debug format",
1983 debug_type_names[write_symbols]);
1985 /* We know which debug output will be used so we can set flag_var_tracking
1986 and flag_var_tracking_uninit if the user has not specified them. */
1987 if (debug_info_level < DINFO_LEVEL_NORMAL
1988 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1990 if (flag_var_tracking == 1
1991 || flag_var_tracking_uninit == 1)
1993 if (debug_info_level < DINFO_LEVEL_NORMAL)
1994 warning (0, "variable tracking requested, but useless unless "
1995 "producing debug info");
1997 warning (0, "variable tracking requested, but not supported "
1998 "by this debug format");
2000 flag_var_tracking = 0;
2001 flag_var_tracking_uninit = 0;
2004 /* If the user specifically requested variable tracking with tagging
2005 uninitialized variables, we need to turn on variable tracking.
2006 (We already determined above that variable tracking is feasible.) */
2007 if (flag_var_tracking_uninit)
2008 flag_var_tracking = 1;
2010 if (flag_var_tracking == AUTODETECT_VALUE)
2011 flag_var_tracking = optimize >= 1;
2013 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
2014 flag_var_tracking_assignments = flag_var_tracking
2015 && !(flag_selective_scheduling || flag_selective_scheduling2);
2017 if (flag_var_tracking_assignments_toggle)
2018 flag_var_tracking_assignments = !flag_var_tracking_assignments;
2020 if (flag_var_tracking_assignments && !flag_var_tracking)
2021 flag_var_tracking = flag_var_tracking_assignments = -1;
2023 if (flag_var_tracking_assignments
2024 && (flag_selective_scheduling || flag_selective_scheduling2))
2025 warning (0, "var-tracking-assignments changes selective scheduling");
2027 if (flag_tree_cselim == AUTODETECT_VALUE)
2028 #ifdef HAVE_conditional_move
2029 flag_tree_cselim = 1;
2031 flag_tree_cselim = 0;
2034 /* If auxiliary info generation is desired, open the output file.
2035 This goes in the same directory as the source file--unlike
2036 all the other output files. */
2037 if (flag_gen_aux_info)
2039 aux_info_file = fopen (aux_info_file_name, "w");
2040 if (aux_info_file == 0)
2041 fatal_error ("can%'t open %s: %m", aux_info_file_name);
2044 if (! targetm.have_named_sections)
2046 if (flag_function_sections)
2048 warning (0, "-ffunction-sections not supported for this target");
2049 flag_function_sections = 0;
2051 if (flag_data_sections)
2053 warning (0, "-fdata-sections not supported for this target");
2054 flag_data_sections = 0;
2058 if (flag_function_sections && profile_flag)
2060 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2061 flag_function_sections = 0;
2064 #ifndef HAVE_prefetch
2065 if (flag_prefetch_loop_arrays)
2067 warning (0, "-fprefetch-loop-arrays not supported for this target");
2068 flag_prefetch_loop_arrays = 0;
2071 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2073 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2074 flag_prefetch_loop_arrays = 0;
2078 /* This combination of options isn't handled for i386 targets and doesn't
2079 make much sense anyway, so don't allow it. */
2080 if (flag_prefetch_loop_arrays && optimize_size)
2082 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2083 flag_prefetch_loop_arrays = 0;
2086 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2087 if (flag_signaling_nans)
2088 flag_trapping_math = 1;
2090 /* We cannot reassociate if we want traps or signed zeros. */
2091 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2093 warning (0, "-fassociative-math disabled; other options take precedence");
2094 flag_associative_math = 0;
2097 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2098 if (flag_cx_limited_range)
2099 flag_complex_method = 0;
2101 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2102 if (flag_cx_fortran_rules)
2103 flag_complex_method = 1;
2105 /* Targets must be able to place spill slots at lower addresses. If the
2106 target already uses a soft frame pointer, the transition is trivial. */
2107 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2109 warning (0, "-fstack-protector not supported for this target");
2110 flag_stack_protect = 0;
2112 if (!flag_stack_protect)
2113 warn_stack_protect = 0;
2115 /* ??? Unwind info is not correct around the CFG unless either a frame
2116 pointer is present or A_O_A is set. Fixing this requires rewriting
2117 unwind info generation to be aware of the CFG and propagating states
2119 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2120 && flag_omit_frame_pointer)
2122 warning (0, "unwind tables currently require a frame pointer "
2124 flag_omit_frame_pointer = 0;
2127 /* Save the current optimization options. */
2128 optimization_default_node = build_optimization_node ();
2129 optimization_current_node = optimization_default_node;
2132 /* This function can be called multiple times to reinitialize the compiler
2133 back end when register classes or instruction sets have changed,
2134 before each function. */
2136 backend_init_target (void)
2138 /* Initialize alignment variables. */
2141 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2142 to initialize reg_raw_mode[]. */
2145 /* This invokes target hooks to set fixed_reg[] etc, which is
2149 /* This depends on stack_pointer_rtx. */
2150 init_fake_stack_mems ();
2152 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2154 init_alias_target ();
2156 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2159 /* The following initialization functions need to generate rtl, so
2160 provide a dummy function context for them. */
2161 init_dummy_function_start ();
2163 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2164 on a mode change. */
2167 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2168 after a mode change as well. */
2169 caller_save_initialized_p = false;
2171 expand_dummy_function_end ();
2174 /* Initialize the compiler back end. This function is called only once,
2175 when starting the compiler. */
2182 init_inline_once ();
2183 init_varasm_once ();
2184 save_register_info ();
2186 /* Initialize the target-specific back end pieces. */
2188 backend_init_target ();
2191 /* Initialize excess precision settings. */
2193 init_excess_precision (void)
2195 /* Adjust excess precision handling based on the target options. If
2196 the front end cannot handle it, flag_excess_precision_cmdline
2197 will already have been set accordingly in the post_options
2199 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2200 flag_excess_precision = flag_excess_precision_cmdline;
2201 if (flag_unsafe_math_optimizations)
2202 flag_excess_precision = EXCESS_PRECISION_FAST;
2203 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2205 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2206 switch (flt_eval_method)
2210 /* Either the target acts unpredictably (-1) or has all the
2211 operations required not to have excess precision (0). */
2212 flag_excess_precision = EXCESS_PRECISION_FAST;
2216 /* In these cases, predictable excess precision makes
2220 /* Any other implementation-defined FLT_EVAL_METHOD values
2221 require the compiler to handle the associated excess
2222 precision rules in excess_precision_type. */
2228 /* Initialize things that are both lang-dependent and target-dependent.
2229 This function can be called more than once if target parameters change. */
2231 lang_dependent_init_target (void)
2233 /* This determines excess precision settings. */
2234 init_excess_precision ();
2236 /* This creates various _DECL nodes, so needs to be called after the
2237 front end is initialized. It also depends on the HAVE_xxx macros
2238 generated from the target machine description. */
2241 /* The following initialization functions need to generate rtl, so
2242 provide a dummy function context for them. */
2243 init_dummy_function_start ();
2245 /* Do the target-specific parts of expr initialization. */
2246 init_expr_target ();
2248 /* Although the actions of these functions are language-independent,
2249 they use optabs, so we cannot call them from backend_init. */
2253 expand_dummy_function_end ();
2256 /* Language-dependent initialization. Returns nonzero on success. */
2258 lang_dependent_init (const char *name)
2260 location_t save_loc = input_location;
2261 if (dump_base_name == 0)
2262 dump_base_name = name && name[0] ? name : "gccdump";
2264 /* Other front-end initialization. */
2265 input_location = BUILTINS_LOCATION;
2266 if (lang_hooks.init () == 0)
2268 input_location = save_loc;
2270 init_asm_output (name);
2272 /* This creates various _DECL nodes, so needs to be called after the
2273 front end is initialized. */
2276 /* Do the target-specific parts of the initialization. */
2277 lang_dependent_init_target ();
2279 /* If dbx symbol table desired, initialize writing it and output the
2280 predefined types. */
2281 timevar_push (TV_SYMOUT);
2283 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2284 if (dwarf2out_do_frame ())
2285 dwarf2out_frame_init ();
2288 /* Now we have the correct original filename, we can initialize
2290 (*debug_hooks->init) (name);
2292 timevar_pop (TV_SYMOUT);
2298 /* Reinitialize everything when target parameters, such as register usage,
2301 target_reinit (void)
2303 /* Reinitialize RTL backend. */
2304 backend_init_target ();
2306 /* Reinitialize lang-dependent parts. */
2307 lang_dependent_init_target ();
2311 dump_memory_report (bool final)
2313 ggc_print_statistics ();
2314 stringpool_statistics ();
2315 dump_tree_statistics ();
2316 dump_gimple_statistics ();
2317 dump_rtx_statistics ();
2318 dump_alloc_pool_statistics ();
2319 dump_bitmap_statistics ();
2320 dump_vec_loc_statistics ();
2321 dump_ggc_loc_statistics (final);
2322 dump_alias_stats (stderr);
2323 dump_pta_stats (stderr);
2326 /* Clean up: close opened files, etc. */
2331 /* Close the dump files. */
2332 if (flag_gen_aux_info)
2334 fclose (aux_info_file);
2336 unlink (aux_info_file_name);
2339 /* Close non-debugging input and output files. Take special care to note
2340 whether fclose returns an error, since the pages might still be on the
2341 buffer chain while the file is open. */
2345 if (ferror (asm_out_file) != 0)
2346 fatal_error ("error writing to %s: %m", asm_file_name);
2347 if (fclose (asm_out_file) != 0)
2348 fatal_error ("error closing %s: %m", asm_file_name);
2350 unlink_if_ordinary (asm_file_name);
2354 finish_optimization_passes ();
2359 dump_memory_report (true);
2361 /* Language-specific end of compilation actions. */
2362 lang_hooks.finish ();
2365 /* Initialize the compiler, and compile the input file. */
2369 /* Initialize timing first. The C front ends read the main file in
2370 the post_options hook, and C++ does file timings. */
2371 if (time_report || !quiet_flag || flag_detailed_statistics)
2373 timevar_start (TV_TOTAL);
2377 /* Don't do any more if an error has already occurred. */
2380 /* This must be run always, because it is needed to compute the FP
2381 predefined macros, such as __LDBL_MAX__, for targets using non
2382 default FP formats. */
2383 init_adjust_machine_modes ();
2385 /* Set up the back-end if requested. */
2389 /* Language-dependent initialization. Returns true on success. */
2390 if (lang_dependent_init (main_input_filename))
2396 /* Stop timing and print the times. */
2397 timevar_stop (TV_TOTAL);
2398 timevar_print (stderr);
2401 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2402 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2403 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2405 It is not safe to call this function more than once. */
2408 toplev_main (int argc, char **argv)
2410 expandargv (&argc, &argv);
2412 save_argv = CONST_CAST2 (const char **, char **, argv);
2414 /* Initialization of GCC's environment, and diagnostics. */
2415 general_init (argv[0]);
2417 /* Parse the options and do minimal processing; basically just
2418 enough to default flags appropriately. */
2419 decode_options (argc, CONST_CAST2 (const char **, char **, argv));
2423 initialize_plugins ();
2426 print_version (stderr, "");
2429 print_plugins_help (stderr, "");
2431 /* Exit early if we can (e.g. -help). */
2432 if (!exit_after_options)
2435 if (warningcount || errorcount)
2436 print_ignored_options ();
2437 diagnostic_finish (global_dc);
2439 /* Invoke registered plugin callbacks if any. */
2440 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2442 finalize_plugins ();
2443 if (errorcount || sorrycount)
2444 return (FATAL_EXIT_CODE);
2446 return (SUCCESS_EXIT_CODE);