1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
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/>. */
25 #include "coretypes.h"
32 #include "langhooks.h"
38 #include "diagnostic.h"
39 #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
40 #include "insn-attr.h" /* For INSN_SCHEDULING. */
42 #include "tree-pass.h"
47 #include "lto-streamer.h"
49 /* Value of the -G xx switch, and whether it was passed or not. */
50 unsigned HOST_WIDE_INT g_switch_value;
53 /* Same for selective scheduling. */
54 bool sel_sched_switch_set;
56 /* True if we should exit after parsing options. */
57 bool exit_after_options;
59 /* True to warn about any objects definitions whose size is larger
60 than N bytes. Also want about function definitions whose returned
61 values are larger than N bytes, where N is `larger_than_size'. */
62 bool warn_larger_than;
63 HOST_WIDE_INT larger_than_size;
65 /* True to warn about any function whose frame size is larger
67 bool warn_frame_larger_than;
68 HOST_WIDE_INT frame_larger_than_size;
70 /* Type(s) of debugging information we are producing (if any). See
71 flags.h for the definitions of the different possible types of
72 debugging information. */
73 enum debug_info_type write_symbols = NO_DEBUG;
75 /* Level of debugging information we are producing. See flags.h for
76 the definitions of the different possible levels. */
77 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
79 /* A major contribution to object and executable size is debug
80 information size. A major contribution to debug information size
81 is struct descriptions replicated in several object files. The
82 following flags attempt to reduce this information. The basic
83 idea is to not emit struct debugging information in the current
84 compilation unit when that information will be generated by
85 another compilation unit.
87 Debug information for a struct defined in the current source
88 file should be generated in the object file. Likewise the
89 debug information for a struct defined in a header should be
90 generated in the object file of the corresponding source file.
91 Both of these case are handled when the base name of the file of
92 the struct definition matches the base name of the source file
93 of the current compilation unit. This matching emits minimal
94 struct debugging information.
96 The base file name matching rule above will fail to emit debug
97 information for structs defined in system headers. So a second
98 category of files includes system headers in addition to files
101 The remaining types of files are library headers and application
102 headers. We cannot currently distinguish these two types. */
104 enum debug_struct_file
106 DINFO_STRUCT_FILE_NONE, /* Debug no structs. */
107 DINFO_STRUCT_FILE_BASE, /* Debug structs defined in files with the
108 same base name as the compilation unit. */
109 DINFO_STRUCT_FILE_SYS, /* Also debug structs defined in system
111 DINFO_STRUCT_FILE_ANY /* Debug structs defined in all files. */
114 /* Generic structs (e.g. templates not explicitly specialized)
115 may not have a compilation unit associated with them, and so
116 may need to be treated differently from ordinary structs.
118 Structs only handled by reference (indirectly), will also usually
119 not need as much debugging information. */
121 static enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS]
122 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
123 static enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS]
124 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
126 /* Parse the -femit-struct-debug-detailed option value
127 and set the flag variables. */
129 #define MATCH( prefix, string ) \
130 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
131 ? ((string += sizeof prefix - 1), 1) : 0)
134 set_struct_debug_option (const char *spec)
136 /* various labels for comparison */
137 static char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
138 static char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
139 static char none_lbl[] = "none", any_lbl[] = "any";
140 static char base_lbl[] = "base", sys_lbl[] = "sys";
142 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
143 /* Default is to apply to as much as possible. */
144 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
145 int ord = 1, gen = 1;
148 if (MATCH (dfn_lbl, spec))
149 usage = DINFO_USAGE_DFN;
150 else if (MATCH (dir_lbl, spec))
151 usage = DINFO_USAGE_DIR_USE;
152 else if (MATCH (ind_lbl, spec))
153 usage = DINFO_USAGE_IND_USE;
155 /* Generics or not? */
156 if (MATCH (ord_lbl, spec))
158 else if (MATCH (gen_lbl, spec))
161 /* What allowable environment? */
162 if (MATCH (none_lbl, spec))
163 files = DINFO_STRUCT_FILE_NONE;
164 else if (MATCH (any_lbl, spec))
165 files = DINFO_STRUCT_FILE_ANY;
166 else if (MATCH (sys_lbl, spec))
167 files = DINFO_STRUCT_FILE_SYS;
168 else if (MATCH (base_lbl, spec))
169 files = DINFO_STRUCT_FILE_BASE;
171 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
174 /* Effect the specification. */
175 if (usage == DINFO_USAGE_NUM_ENUMS)
179 debug_struct_ordinary[DINFO_USAGE_DFN] = files;
180 debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
181 debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
185 debug_struct_generic[DINFO_USAGE_DFN] = files;
186 debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
187 debug_struct_generic[DINFO_USAGE_IND_USE] = files;
193 debug_struct_ordinary[usage] = files;
195 debug_struct_generic[usage] = files;
199 set_struct_debug_option (spec+1);
202 /* No more -femit-struct-debug-detailed specifications.
205 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
207 if (debug_struct_ordinary[DINFO_USAGE_DIR_USE]
208 < debug_struct_ordinary[DINFO_USAGE_IND_USE]
209 || debug_struct_generic[DINFO_USAGE_DIR_USE]
210 < debug_struct_generic[DINFO_USAGE_IND_USE])
211 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
212 " as much as %<-femit-struct-debug-detailed=ind:...%>");
216 /* Find the base name of a path, stripping off both directories and
217 a single final extension. */
219 base_of_path (const char *path, const char **base_out)
221 const char *base = path;
223 const char *p = path;
227 if (IS_DIR_SEPARATOR(c))
242 /* Match the base name of a file to the base name of a compilation unit. */
244 static const char *main_input_basename;
245 static int main_input_baselength;
248 matches_main_base (const char *path)
250 /* Cache the last query. */
251 static const char *last_path = NULL;
252 static int last_match = 0;
253 if (path != last_path)
256 int length = base_of_path (path, &base);
258 last_match = (length == main_input_baselength
259 && memcmp (base, main_input_basename, length) == 0);
264 #ifdef DEBUG_DEBUG_STRUCT
267 dump_struct_debug (tree type, enum debug_info_usage usage,
268 enum debug_struct_file criterion, int generic,
269 int matches, int result)
271 /* Find the type name. */
272 tree type_decl = TYPE_STUB_DECL (type);
274 const char *name = 0;
275 if (TREE_CODE (t) == TYPE_DECL)
278 name = IDENTIFIER_POINTER (t);
280 fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n",
282 DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr",
283 matches ? "bas" : "hdr",
284 generic ? "gen" : "ord",
285 usage == DINFO_USAGE_DFN ? ";" :
286 usage == DINFO_USAGE_DIR_USE ? "." : "*",
288 (void*) type_decl, name);
291 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
292 dump_struct_debug (type, usage, criterion, generic, matches, result)
296 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
303 should_emit_struct_debug (tree type, enum debug_info_usage usage)
305 enum debug_struct_file criterion;
307 bool generic = lang_hooks.types.generic_p (type);
310 criterion = debug_struct_generic[usage];
312 criterion = debug_struct_ordinary[usage];
314 if (criterion == DINFO_STRUCT_FILE_NONE)
315 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
316 if (criterion == DINFO_STRUCT_FILE_ANY)
317 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
319 type_decl = TYPE_STUB_DECL (type);
321 if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl))
322 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
324 if (matches_main_base (DECL_SOURCE_FILE (type_decl)))
325 return DUMP_GSTRUCT (type, usage, criterion, generic, true, true);
326 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
329 /* Nonzero means use GNU-only extensions in the generated symbolic
330 debugging information. Currently, this only has an effect when
331 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
332 bool use_gnu_debug_info_extensions;
334 /* The default visibility for all symbols (unless overridden) */
335 enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
337 /* Global visibility options. */
338 struct visibility_flags visibility_options;
340 /* What to print when a switch has no documentation. */
341 static const char undocumented_msg[] = N_("This switch lacks documentation");
343 /* Used for bookkeeping on whether user set these flags so
344 -fprofile-use/-fprofile-generate does not use them. */
345 static bool profile_arc_flag_set, flag_profile_values_set;
346 static bool flag_unroll_loops_set, flag_tracer_set;
347 static bool flag_value_profile_transformations_set;
348 static bool flag_peel_loops_set, flag_branch_probabilities_set;
349 static bool flag_inline_functions_set, flag_ipa_cp_set, flag_ipa_cp_clone_set;
350 static bool flag_predictive_commoning_set, flag_unswitch_loops_set, flag_gcse_after_reload_set;
352 /* Functions excluded from profiling. */
354 typedef char *char_p; /* For DEF_VEC_P. */
356 DEF_VEC_ALLOC_P(char_p,heap);
358 static VEC(char_p,heap) *flag_instrument_functions_exclude_functions;
359 static VEC(char_p,heap) *flag_instrument_functions_exclude_files;
361 typedef const char *const_char_p; /* For DEF_VEC_P. */
362 DEF_VEC_P(const_char_p);
363 DEF_VEC_ALLOC_P(const_char_p,heap);
365 static VEC(const_char_p,heap) *ignored_options;
367 /* Language specific warning pass for unused results. */
368 bool flag_warn_unused_result = false;
370 /* Input file names. */
371 const char **in_fnames;
372 unsigned num_in_fnames;
374 static int common_handle_option (size_t scode, const char *arg, int value,
375 unsigned int lang_mask);
376 static void handle_param (const char *);
377 static unsigned int handle_option (const char **argv, unsigned int lang_mask);
378 static char *write_langs (unsigned int lang_mask);
379 static void complain_wrong_lang (const char *, const struct cl_option *,
380 unsigned int lang_mask);
381 static void handle_options (unsigned int, const char **, unsigned int);
382 static void set_debug_level (enum debug_info_type type, int extended,
385 /* If ARG is a non-negative integer made up solely of digits, return its
386 value, otherwise return -1. */
388 integral_argument (const char *arg)
392 while (*p && ISDIGIT (*p))
401 /* Return a malloced slash-separated list of languages in MASK. */
403 write_langs (unsigned int mask)
405 unsigned int n = 0, len = 0;
406 const char *lang_name;
409 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
410 if (mask & (1U << n))
411 len += strlen (lang_name) + 1;
413 result = XNEWVEC (char, len);
415 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
416 if (mask & (1U << n))
420 strcpy (result + len, lang_name);
421 len += strlen (lang_name);
429 /* Complain that switch OPT_INDEX does not apply to this front end. */
431 complain_wrong_lang (const char *text, const struct cl_option *option,
432 unsigned int lang_mask)
434 char *ok_langs, *bad_lang;
436 /* The LTO front end inherits all the options from the first front
437 end that was used. However, not all the original front end
438 options make sense in LTO.
440 A real solution would be to filter this in collect2, but collect2
441 does not have access to all the option attributes to know what to
442 filter. So, in lto1 we silently accept inherited flags and do
444 if (lang_mask & CL_LTO)
447 ok_langs = write_langs (option->flags);
448 bad_lang = write_langs (lang_mask);
450 /* Eventually this should become a hard error IMO. */
451 warning (0, "command line option \"%s\" is valid for %s but not for %s",
452 text, ok_langs, bad_lang);
458 /* Buffer the unknown option described by the string OPT. Currently,
459 we only complain about unknown -Wno-* options if they may have
460 prevented a diagnostic. Otherwise, we just ignore them.
461 Note that if we do complain, it is only as a warning, not an error;
462 passing the compiler an unrecognised -Wno-* option should never
463 change whether the compilation succeeds or fails. */
465 static void postpone_unknown_option_warning(const char *opt)
467 VEC_safe_push (const_char_p, heap, ignored_options, opt);
470 /* Produce a warning for each option previously buffered. */
472 void print_ignored_options (void)
474 location_t saved_loc = input_location;
478 while (!VEC_empty (const_char_p, ignored_options))
481 opt = VEC_pop (const_char_p, ignored_options);
482 warning (0, "unrecognized command line option \"%s\"", opt);
485 input_location = saved_loc;
488 /* Handle the switch beginning at ARGV for the language indicated by
489 LANG_MASK. Returns the number of switches consumed. */
491 handle_option (const char **argv, unsigned int lang_mask)
494 const char *opt, *arg = 0;
497 unsigned int result = 0;
498 const struct cl_option *option;
502 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
503 if (opt_index == cl_options_count
504 && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
505 && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
507 /* Drop the "no-" from negative switches. */
508 size_t len = strlen (opt) - 3;
510 dup = XNEWVEC (char, len + 1);
513 memcpy (dup + 2, opt + 5, len - 2 + 1);
516 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
517 if (opt_index == cl_options_count && opt[1] == 'W')
519 /* We don't generate warnings for unknown -Wno-* options
520 unless we issue diagnostics. */
521 postpone_unknown_option_warning (argv[0]);
527 if (opt_index == cl_options_count)
530 option = &cl_options[opt_index];
532 /* Reject negative form of switches that don't take negatives as
534 if (!value && (option->flags & CL_REJECT_NEGATIVE))
537 /* We've recognized this switch. */
540 /* Check to see if the option is disabled for this configuration. */
541 if (option->flags & CL_DISABLED)
543 error ("command line option %qs"
544 " is not supported by this configuration", opt);
548 /* Sort out any argument the switch takes. */
549 if (option->flags & CL_JOINED)
551 /* Have arg point to the original switch. This is because
552 some code, such as disable_builtin_function, expects its
553 argument to be persistent until the program exits. */
554 arg = argv[0] + cl_options[opt_index].opt_len + 1;
556 arg += strlen ("no-");
558 if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
560 if (option->flags & CL_SEPARATE)
566 /* Missing argument. */
570 else if (option->flags & CL_SEPARATE)
576 /* Now we've swallowed any potential argument, complain if this
577 is a switch for a different front end. */
578 if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
580 complain_wrong_lang (argv[0], option, lang_mask);
583 else if ((option->flags & CL_TARGET)
584 && (option->flags & CL_LANG_ALL)
585 && !(option->flags & lang_mask))
587 /* Complain for target flag language mismatches if any languages
589 complain_wrong_lang (argv[0], option, lang_mask);
593 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
595 if (!lang_hooks.missing_argument (opt, opt_index))
596 error ("missing argument to \"%s\"", opt);
600 /* If the switch takes an integer, convert it. */
601 if (arg && (option->flags & CL_UINTEGER))
603 value = integral_argument (arg);
606 error ("argument to \"%s\" should be a non-negative integer",
612 if (option->flag_var)
613 set_option (option, value, arg);
615 if (option->flags & lang_mask)
617 if (lang_hooks.handle_option (opt_index, arg, value) == 0)
620 lto_register_user_option (opt_index, arg, value, lang_mask);
623 if (result && (option->flags & CL_COMMON))
625 if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
628 lto_register_user_option (opt_index, arg, value, CL_COMMON);
631 if (result && (option->flags & CL_TARGET))
633 if (!targetm.handle_option (opt_index, arg, value))
636 lto_register_user_option (opt_index, arg, value, CL_TARGET);
645 /* Handle FILENAME from the command line. */
647 add_input_filename (const char *filename)
650 in_fnames = XRESIZEVEC (const char *, in_fnames, num_in_fnames);
651 in_fnames[num_in_fnames - 1] = filename;
654 /* Add comma-separated strings to a char_p vector. */
657 add_comma_separated_to_vector (VEC(char_p,heap) **pvec, const char* arg)
664 /* We never free this string. */
677 VEC_safe_push (char_p, heap, *pvec, token_start);
680 if (*r == '\\' && r[1] == ',')
688 if (*token_start != '\0')
689 VEC_safe_push (char_p, heap, *pvec, token_start);
692 /* Return whether we should exclude FNDECL from instrumentation. */
695 flag_instrument_functions_exclude_p (tree fndecl)
697 if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0)
703 name = lang_hooks.decl_printable_name (fndecl, 0);
705 VEC_iterate (char_p, flag_instrument_functions_exclude_functions,
709 if (strstr (name, s) != NULL)
714 if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0)
720 name = DECL_SOURCE_FILE (fndecl);
722 VEC_iterate (char_p, flag_instrument_functions_exclude_files, i, s);
725 if (strstr (name, s) != NULL)
734 /* Decode and handle the vector of command line options. LANG_MASK
735 contains has a single bit set representing the current
738 handle_options (unsigned int argc, const char **argv, unsigned int lang_mask)
742 for (i = 1; i < argc; i += n)
744 const char *opt = argv[i];
746 /* Interpret "-" or a non-switch as a file name. */
747 if (opt[0] != '-' || opt[1] == '\0')
749 if (main_input_filename == NULL)
751 main_input_filename = opt;
752 main_input_baselength
753 = base_of_path (main_input_filename, &main_input_basename);
755 add_input_filename (opt);
760 n = handle_option (argv + i, lang_mask);
765 error ("unrecognized command line option \"%s\"", opt);
770 /* Parse command line options and set default flag values. Do minimal
771 options processing. */
773 decode_options (unsigned int argc, const char **argv)
775 static bool first_time_p = true;
776 static int initial_min_crossjump_insns;
777 static int initial_max_fields_for_field_sensitive;
778 static int initial_loop_invariant_max_bbs_in_loop;
779 static unsigned int initial_lang_mask;
781 unsigned int i, lang_mask;
789 /* Perform language-specific options initialization. */
790 initial_lang_mask = lang_mask = lang_hooks.init_options (argc, argv);
792 lang_hooks.initialize_diagnostics (global_dc);
794 /* Save initial values of parameters we reset. */
795 initial_min_crossjump_insns
796 = compiler_params[PARAM_MIN_CROSSJUMP_INSNS].value;
797 initial_max_fields_for_field_sensitive
798 = compiler_params[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE].value;
799 initial_loop_invariant_max_bbs_in_loop
800 = compiler_params[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP].value;
803 lang_mask = initial_lang_mask;
805 /* Scan to see what optimization level has been specified. That will
806 determine the default value of many flags. */
807 for (i = 1; i < argc; i++)
809 if (!strcmp (argv[i], "-O"))
814 else if (argv[i][0] == '-' && argv[i][1] == 'O')
816 /* Handle -Os, -O2, -O3, -O69, ... */
817 const char *p = &argv[i][2];
819 if ((p[0] == 's') && (p[1] == 0))
823 /* Optimizing for size forces optimize to be 2. */
828 const int optimize_val = read_integral_parameter (p, p - 2, -1);
829 if (optimize_val != -1)
831 optimize = optimize_val;
838 /* Use priority coloring if cover classes is not defined for the
840 if (targetm.ira_cover_classes == NULL)
841 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
843 /* -O1 optimizations. */
844 opt1 = (optimize >= 1);
845 flag_defer_pop = opt1;
847 flag_delayed_branch = opt1;
849 #ifdef CAN_DEBUG_WITHOUT_FP
850 flag_omit_frame_pointer = opt1;
852 flag_guess_branch_prob = opt1;
853 flag_cprop_registers = opt1;
854 flag_forward_propagate = opt1;
855 flag_if_conversion = opt1;
856 flag_if_conversion2 = opt1;
857 flag_ipa_pure_const = opt1;
858 flag_ipa_reference = opt1;
859 flag_merge_constants = opt1;
860 flag_split_wide_types = opt1;
861 flag_tree_ccp = opt1;
862 flag_tree_dce = opt1;
863 flag_tree_dom = opt1;
864 flag_tree_dse = opt1;
865 flag_tree_ter = opt1;
866 flag_tree_sra = opt1;
867 flag_tree_copyrename = opt1;
868 flag_tree_fre = opt1;
869 flag_tree_copy_prop = opt1;
870 flag_tree_sink = opt1;
873 /* -O2 optimizations. */
874 opt2 = (optimize >= 2);
875 flag_inline_small_functions = opt2;
876 flag_indirect_inlining = opt2;
877 flag_thread_jumps = opt2;
878 flag_crossjumping = opt2;
879 flag_optimize_sibling_calls = opt2;
880 flag_cse_follow_jumps = opt2;
882 flag_expensive_optimizations = opt2;
883 flag_rerun_cse_after_loop = opt2;
884 flag_caller_saves = opt2;
885 flag_peephole2 = opt2;
886 #ifdef INSN_SCHEDULING
887 flag_schedule_insns = opt2;
888 flag_schedule_insns_after_reload = opt2;
891 flag_strict_aliasing = opt2;
892 flag_strict_overflow = opt2;
893 flag_reorder_blocks = opt2;
894 flag_reorder_functions = opt2;
895 flag_tree_vrp = opt2;
896 flag_tree_builtin_call_dce = opt2;
897 flag_tree_pre = opt2;
898 flag_tree_switch_conversion = 1;
902 /* Track fields in field-sensitive alias analysis. */
903 set_param_value ("max-fields-for-field-sensitive",
904 (opt2) ? 100 : initial_max_fields_for_field_sensitive);
906 /* For -O1 only do loop invariant motion for very small loops. */
907 set_param_value ("loop-invariant-max-bbs-in-loop",
908 (opt2) ? initial_loop_invariant_max_bbs_in_loop : 1000);
910 /* -O3 optimizations. */
911 opt3 = (optimize >= 3);
912 flag_predictive_commoning = opt3;
913 flag_inline_functions = opt3;
914 flag_unswitch_loops = opt3;
915 flag_gcse_after_reload = opt3;
916 flag_tree_vectorize = opt3;
917 flag_ipa_cp_clone = opt3;
918 if (flag_ipa_cp_clone)
921 /* Just -O1/-O0 optimizations. */
922 opt1_max = (optimize <= 1);
923 align_loops = opt1_max;
924 align_jumps = opt1_max;
925 align_labels = opt1_max;
926 align_functions = opt1_max;
930 /* Inlining of functions reducing size is a good idea regardless of them
931 being declared inline. */
932 flag_inline_functions = 1;
934 /* Basic optimization options. */
939 /* We want to crossjump as much as possible. */
940 set_param_value ("min-crossjump-insns", 1);
943 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns);
947 /* Initialize whether `char' is signed. */
948 flag_signed_char = DEFAULT_SIGNED_CHAR;
949 /* Set this to a special "uninitialized" value. The actual default is
950 set after target options have been processed. */
951 flag_short_enums = 2;
953 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
955 target_flags = targetm.default_target_flags;
957 /* Some targets have ABI-specified unwind tables. */
958 flag_unwind_tables = targetm.unwind_tables_default;
961 /* Clear any options currently held for LTO. */
962 lto_clear_user_options ();
964 #ifdef OPTIMIZATION_OPTIONS
965 /* Allow default optimizations to be specified on a per-machine basis. */
966 OPTIMIZATION_OPTIONS (optimize, optimize_size);
969 handle_options (argc, argv, lang_mask);
971 /* Make DUMP_BASE_NAME relative to the AUX_BASE_NAME directory,
972 typically the directory to contain the object file. */
973 if (aux_base_name && ! IS_ABSOLUTE_PATH (dump_base_name))
975 const char *aux_base;
977 base_of_path (aux_base_name, &aux_base);
978 if (aux_base_name != aux_base)
980 int dir_len = aux_base - aux_base_name;
981 char *new_dump_base_name =
982 XNEWVEC (char, strlen(dump_base_name) + dir_len + 1);
984 /* Copy directory component from AUX_BASE_NAME. */
985 memcpy (new_dump_base_name, aux_base_name, dir_len);
986 /* Append existing DUMP_BASE_NAME. */
987 strcpy (new_dump_base_name + dir_len, dump_base_name);
988 dump_base_name = new_dump_base_name;
992 /* Handle related options for unit-at-a-time, toplevel-reorder, and
994 if (!flag_unit_at_a_time)
996 if (flag_section_anchors == 1)
997 error ("Section anchors must be disabled when unit-at-a-time "
999 flag_section_anchors = 0;
1000 if (flag_toplevel_reorder == 1)
1001 error ("Toplevel reorder must be disabled when unit-at-a-time "
1003 flag_toplevel_reorder = 0;
1005 /* Unless the user has asked for section anchors, we disable toplevel
1006 reordering at -O0 to disable transformations that might be surprising
1007 to end users and to get -fno-toplevel-reorder tested. */
1008 if (!optimize && flag_toplevel_reorder == 2 && flag_section_anchors != 1)
1010 flag_toplevel_reorder = 0;
1011 flag_section_anchors = 0;
1013 if (!flag_toplevel_reorder)
1015 if (flag_section_anchors == 1)
1016 error ("section anchors must be disabled when toplevel reorder"
1018 flag_section_anchors = 0;
1024 flag_pic = flag_pie;
1025 if (flag_pic && !flag_pie)
1031 /* Inlining does not work if not optimizing,
1032 so force it not to be done. */
1037 /* The optimization to partition hot and cold basic blocks into separate
1038 sections of the .o and executable files does not work (currently)
1039 with exception handling. This is because there is no support for
1040 generating unwind info. If flag_exceptions is turned on we need to
1041 turn off the partitioning optimization. */
1043 if (flag_exceptions && flag_reorder_blocks_and_partition
1044 && (USING_SJLJ_EXCEPTIONS
1045 #ifdef TARGET_UNWIND_INFO
1050 inform (input_location,
1051 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1052 flag_reorder_blocks_and_partition = 0;
1053 flag_reorder_blocks = 1;
1056 /* If user requested unwind info, then turn off the partitioning
1059 if (flag_unwind_tables && ! targetm.unwind_tables_default
1060 && flag_reorder_blocks_and_partition
1061 && (USING_SJLJ_EXCEPTIONS
1062 #ifdef TARGET_UNWIND_INFO
1067 inform (input_location,
1068 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1069 flag_reorder_blocks_and_partition = 0;
1070 flag_reorder_blocks = 1;
1073 /* If the target requested unwind info, then turn off the partitioning
1074 optimization with a different message. Likewise, if the target does not
1075 support named sections. */
1077 if (flag_reorder_blocks_and_partition
1078 && (!targetm.have_named_sections
1079 || (flag_unwind_tables && targetm.unwind_tables_default
1080 && (USING_SJLJ_EXCEPTIONS
1081 #ifdef TARGET_UNWIND_INFO
1086 inform (input_location,
1087 "-freorder-blocks-and-partition does not work on this architecture");
1088 flag_reorder_blocks_and_partition = 0;
1089 flag_reorder_blocks = 1;
1092 /* Pipelining of outer loops is only possible when general pipelining
1093 capabilities are requested. */
1094 if (!flag_sel_sched_pipelining)
1095 flag_sel_sched_pipelining_outer_loops = 0;
1097 if (!targetm.ira_cover_classes
1098 && flag_ira_algorithm == IRA_ALGORITHM_CB)
1100 inform (input_location,
1101 "-fira-algorithm=CB does not work on this architecture");
1102 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
1105 /* Save the current optimization options if this is the first call. */
1108 optimization_default_node = build_optimization_node ();
1109 optimization_current_node = optimization_default_node;
1110 first_time_p = false;
1112 if (flag_conserve_stack)
1114 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME))
1115 PARAM_VALUE (PARAM_LARGE_STACK_FRAME) = 100;
1116 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH))
1117 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH) = 40;
1122 #define LEFT_COLUMN 27
1124 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1125 followed by word-wrapped HELP in a second column. */
1127 wrap_help (const char *help,
1129 unsigned int item_width,
1130 unsigned int columns)
1132 unsigned int col_width = LEFT_COLUMN;
1133 unsigned int remaining, room, len;
1135 remaining = strlen (help);
1139 room = columns - 3 - MAX (col_width, item_width);
1148 for (i = 0; help[i]; i++)
1150 if (i >= room && len != remaining)
1154 else if ((help[i] == '-' || help[i] == '/')
1155 && help[i + 1] != ' '
1156 && i > 0 && ISALPHA (help[i - 1]))
1161 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
1163 while (help[len] == ' ')
1171 /* Print help for a specific front-end, etc. */
1173 print_filtered_help (unsigned int include_flags,
1174 unsigned int exclude_flags,
1175 unsigned int any_flags,
1176 unsigned int columns)
1180 static char *printed = NULL;
1182 bool displayed = false;
1184 if (include_flags == CL_PARAMS)
1186 for (i = 0; i < LAST_PARAM; i++)
1188 const char *param = compiler_params[i].option;
1190 help = compiler_params[i].help;
1191 if (help == NULL || *help == '\0')
1193 if (exclude_flags & CL_UNDOCUMENTED)
1195 help = undocumented_msg;
1198 /* Get the translation. */
1201 wrap_help (help, param, strlen (param), columns);
1208 printed = XCNEWVAR (char, cl_options_count);
1210 for (i = 0; i < cl_options_count; i++)
1212 static char new_help[128];
1213 const struct cl_option *option = cl_options + i;
1218 if (include_flags == 0
1219 || ((option->flags & include_flags) != include_flags))
1221 if ((option->flags & any_flags) == 0)
1225 /* Skip unwanted switches. */
1226 if ((option->flags & exclude_flags) != 0)
1230 /* Skip switches that have already been printed. */
1236 help = option->help;
1239 if (exclude_flags & CL_UNDOCUMENTED)
1241 help = undocumented_msg;
1244 /* Get the translation. */
1247 /* Find the gap between the name of the
1248 option and its descriptive text. */
1249 tab = strchr (help, '\t');
1258 opt = option->opt_text;
1262 /* With the -Q option enabled we change the descriptive text associated
1263 with an option to be an indication of its current setting. */
1266 if (len < (LEFT_COLUMN + 2))
1267 strcpy (new_help, "\t\t");
1269 strcpy (new_help, "\t");
1271 if (option->flag_var != NULL)
1273 if (option->flags & CL_JOINED)
1275 if (option->var_type == CLVC_STRING)
1277 if (* (const char **) option->flag_var != NULL)
1278 snprintf (new_help + strlen (new_help),
1279 sizeof (new_help) - strlen (new_help),
1280 * (const char **) option->flag_var);
1283 sprintf (new_help + strlen (new_help),
1284 "%#x", * (int *) option->flag_var);
1287 strcat (new_help, option_enabled (i)
1288 ? _("[enabled]") : _("[disabled]"));
1294 wrap_help (help, opt, len, columns);
1300 unsigned int langs = include_flags & CL_LANG_ALL;
1303 printf (_(" No options with the desired characteristics were found\n"));
1308 /* PR 31349: Tell the user how to see all of the
1309 options supported by a specific front end. */
1310 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1311 if ((1U << i) & langs)
1312 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1313 lang_names[i], lang_names[i]);
1317 else if (! displayed)
1318 printf (_(" All options with the desired characteristics have already been displayed\n"));
1323 /* Display help for a specified type of option.
1324 The options must have ALL of the INCLUDE_FLAGS set
1325 ANY of the flags in the ANY_FLAGS set
1326 and NONE of the EXCLUDE_FLAGS set. */
1328 print_specific_help (unsigned int include_flags,
1329 unsigned int exclude_flags,
1330 unsigned int any_flags)
1332 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1333 const char * description = NULL;
1334 const char * descrip_extra = "";
1337 static unsigned int columns = 0;
1339 /* Sanity check: Make sure that we do not have more
1340 languages than we have bits available to enumerate them. */
1341 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1343 /* If we have not done so already, obtain
1344 the desired maximum width of the output. */
1349 GET_ENVIRONMENT (p, "COLUMNS");
1352 int value = atoi (p);
1359 /* Use a reasonable default. */
1363 /* Decide upon the title for the options that we are going to display. */
1364 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1366 switch (flag & include_flags)
1372 description = _("The following options are target specific");
1375 description = _("The following options control compiler warning messages");
1377 case CL_OPTIMIZATION:
1378 description = _("The following options control optimizations");
1381 description = _("The following options are language-independent");
1384 description = _("The --param option recognizes the following as parameters");
1387 if (i >= cl_lang_count)
1389 if (exclude_flags & all_langs_mask)
1390 description = _("The following options are specific to just the language ");
1392 description = _("The following options are supported by the language ");
1393 descrip_extra = lang_names [i];
1398 if (description == NULL)
1402 if (include_flags & CL_UNDOCUMENTED)
1403 description = _("The following options are not documented");
1404 else if (include_flags & CL_SEPARATE)
1405 description = _("The following options take separate arguments");
1406 else if (include_flags & CL_JOINED)
1407 description = _("The following options take joined arguments");
1410 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1417 if (any_flags & all_langs_mask)
1418 description = _("The following options are language-related");
1420 description = _("The following options are language-independent");
1424 printf ("%s%s:\n", description, descrip_extra);
1425 print_filtered_help (include_flags, exclude_flags, any_flags, columns);
1428 /* Handle target- and language-independent options. Return zero to
1429 generate an "unknown option" message. Only options that need
1430 extra handling need to be listed here; if you simply want
1431 VALUE assigned to a variable, it happens automatically. */
1434 common_handle_option (size_t scode, const char *arg, int value,
1435 unsigned int lang_mask)
1437 static bool verbose = false;
1438 enum opt_code code = (enum opt_code) scode;
1453 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1454 unsigned int undoc_mask;
1457 undoc_mask = (verbose | extra_warnings) ? 0 : CL_UNDOCUMENTED;
1458 /* First display any single language specific options. */
1459 for (i = 0; i < cl_lang_count; i++)
1461 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
1462 /* Next display any multi language specific options. */
1463 print_specific_help (0, undoc_mask, all_langs_mask);
1464 /* Then display any remaining, non-language options. */
1465 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1466 print_specific_help (i, undoc_mask, 0);
1467 exit_after_options = true;
1471 case OPT_ftarget_help:
1472 case OPT__target_help:
1473 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
1474 exit_after_options = true;
1476 /* Allow the target a chance to give the user some additional information. */
1477 if (targetm.target_help)
1478 targetm.target_help ();
1484 const char * a = arg;
1485 unsigned int include_flags = 0;
1486 /* Note - by default we include undocumented options when listing
1487 specific classes. If you only want to see documented options
1488 then add ",^undocumented" to the --help= option. E.g.:
1490 --help=target,^undocumented */
1491 unsigned int exclude_flags = 0;
1493 /* Walk along the argument string, parsing each word in turn.
1495 arg = [^]{word}[,{arg}]
1496 word = {optimizers|target|warnings|undocumented|
1497 params|common|<language>} */
1502 const char * string;
1507 { "optimizers", CL_OPTIMIZATION },
1508 { "target", CL_TARGET },
1509 { "warnings", CL_WARNING },
1510 { "undocumented", CL_UNDOCUMENTED },
1511 { "params", CL_PARAMS },
1512 { "joined", CL_JOINED },
1513 { "separate", CL_SEPARATE },
1514 { "common", CL_COMMON },
1517 unsigned int * pflags;
1519 unsigned int lang_flag, specific_flag;
1526 pflags = & exclude_flags;
1529 pflags = & include_flags;
1531 comma = strchr (a, ',');
1542 /* Check to see if the string matches an option class name. */
1543 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1544 if (strncasecmp (a, specifics[i].string, len) == 0)
1546 specific_flag = specifics[i].flag;
1550 /* Check to see if the string matches a language name.
1551 Note - we rely upon the alpha-sorted nature of the entries in
1552 the lang_names array, specifically that shorter names appear
1553 before their longer variants. (i.e. C before C++). That way
1554 when we are attempting to match --help=c for example we will
1555 match with C first and not C++. */
1556 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1557 if (strncasecmp (a, lang_names[i], len) == 0)
1559 lang_flag = 1U << i;
1563 if (specific_flag != 0)
1566 * pflags |= specific_flag;
1569 /* The option's argument matches both the start of a
1570 language name and the start of an option class name.
1571 We have a special case for when the user has
1572 specified "--help=c", but otherwise we have to issue
1574 if (strncasecmp (a, "c", len) == 0)
1575 * pflags |= lang_flag;
1578 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1582 else if (lang_flag != 0)
1583 * pflags |= lang_flag;
1586 "warning: unrecognized argument to --help= option: %.*s\n",
1595 print_specific_help (include_flags, exclude_flags, 0);
1596 exit_after_options = true;
1602 exit_after_options = true;
1606 g_switch_value = value;
1607 g_switch_set = true;
1612 /* Currently handled in a prescan. */
1616 enable_warning_as_error (arg, value, lang_mask);
1619 case OPT_Wlarger_than_:
1620 /* This form corresponds to -Wlarger-than-.
1621 Kept for backward compatibility.
1622 Don't use it as the first argument of warning(). */
1624 case OPT_Wlarger_than_eq:
1625 larger_than_size = value;
1626 warn_larger_than = value != -1;
1629 case OPT_Wframe_larger_than_:
1630 frame_larger_than_size = value;
1631 warn_frame_larger_than = value != -1;
1634 case OPT_Wstrict_aliasing:
1635 set_Wstrict_aliasing (value);
1638 case OPT_Wstrict_aliasing_:
1639 warn_strict_aliasing = value;
1642 case OPT_Wstrict_overflow:
1643 warn_strict_overflow = (value
1644 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1648 case OPT_Wstrict_overflow_:
1649 warn_strict_overflow = value;
1653 warn_unused = value;
1658 aux_info_file_name = arg;
1659 flag_gen_aux_info = 1;
1663 aux_base_name = arg;
1666 case OPT_auxbase_strip:
1668 char *tmp = xstrdup (arg);
1669 strip_off_ending (tmp, strlen (tmp));
1671 aux_base_name = tmp;
1676 decode_d_option (arg);
1680 dump_base_name = arg;
1683 case OPT_falign_functions_:
1684 align_functions = value;
1687 case OPT_falign_jumps_:
1688 align_jumps = value;
1691 case OPT_falign_labels_:
1692 align_labels = value;
1695 case OPT_falign_loops_:
1696 align_loops = value;
1699 case OPT_fbranch_probabilities:
1700 flag_branch_probabilities_set = true;
1703 case OPT_fcall_used_:
1704 fix_register (arg, 0, 1);
1707 case OPT_fcall_saved_:
1708 fix_register (arg, 0, 0);
1712 dbg_cnt_process_opt (arg);
1715 case OPT_fdbg_cnt_list:
1716 dbg_cnt_list_all_counters ();
1719 case OPT_fdebug_prefix_map_:
1720 add_debug_prefix_map (arg);
1723 case OPT_fdiagnostics_show_location_:
1724 if (!strcmp (arg, "once"))
1725 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1726 else if (!strcmp (arg, "every-line"))
1727 diagnostic_prefixing_rule (global_dc)
1728 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1733 case OPT_fdiagnostics_show_option:
1734 global_dc->show_option_requested = true;
1738 if (!dump_switch_p (arg))
1742 case OPT_fexcess_precision_:
1743 if (!strcmp (arg, "fast"))
1744 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
1745 else if (!strcmp (arg, "standard"))
1746 flag_excess_precision_cmdline = EXCESS_PRECISION_STANDARD;
1748 error ("unknown excess precision style \"%s\"", arg);
1751 case OPT_ffast_math:
1752 set_fast_math_flags (value);
1755 case OPT_funsafe_math_optimizations:
1756 set_unsafe_math_optimizations_flags (value);
1760 fix_register (arg, 1, 1);
1763 case OPT_finline_limit_:
1764 case OPT_finline_limit_eq:
1765 set_param_value ("max-inline-insns-single", value / 2);
1766 set_param_value ("max-inline-insns-auto", value / 2);
1769 case OPT_finstrument_functions_exclude_function_list_:
1770 add_comma_separated_to_vector
1771 (&flag_instrument_functions_exclude_functions, arg);
1774 case OPT_finstrument_functions_exclude_file_list_:
1775 add_comma_separated_to_vector
1776 (&flag_instrument_functions_exclude_files, arg);
1779 case OPT_fmessage_length_:
1780 pp_set_line_maximum_length (global_dc->printer, value);
1783 case OPT_fpack_struct_:
1784 if (value <= 0 || (value & (value - 1)) || value > 16)
1785 error ("structure alignment must be a small power of two, not %d", value);
1788 initial_max_fld_align = value;
1789 maximum_field_alignment = value * BITS_PER_UNIT;
1793 case OPT_fpeel_loops:
1794 flag_peel_loops_set = true;
1798 #ifdef ENABLE_PLUGIN
1799 add_new_plugin (arg);
1801 error ("Plugin support is disabled. Configure with --enable-plugin.");
1805 case OPT_fplugin_arg_:
1806 #ifdef ENABLE_PLUGIN
1807 parse_plugin_arg_opt (arg);
1809 error ("Plugin support is disabled. Configure with --enable-plugin.");
1813 case OPT_fprofile_arcs:
1814 profile_arc_flag_set = true;
1817 case OPT_finline_functions:
1818 flag_inline_functions_set = true;
1821 case OPT_fprofile_dir_:
1822 profile_data_prefix = xstrdup (arg);
1825 case OPT_fprofile_use_:
1826 profile_data_prefix = xstrdup (arg);
1827 flag_profile_use = true;
1829 /* No break here - do -fprofile-use processing. */
1830 case OPT_fprofile_use:
1831 if (!flag_branch_probabilities_set)
1832 flag_branch_probabilities = value;
1833 if (!flag_profile_values_set)
1834 flag_profile_values = value;
1835 if (!flag_unroll_loops_set)
1836 flag_unroll_loops = value;
1837 if (!flag_peel_loops_set)
1838 flag_peel_loops = value;
1839 if (!flag_tracer_set)
1840 flag_tracer = value;
1841 if (!flag_value_profile_transformations_set)
1842 flag_value_profile_transformations = value;
1843 if (!flag_inline_functions_set)
1844 flag_inline_functions = value;
1845 if (!flag_ipa_cp_set)
1846 flag_ipa_cp = value;
1847 if (!flag_ipa_cp_clone_set
1848 && value && flag_ipa_cp)
1849 flag_ipa_cp_clone = value;
1850 if (!flag_predictive_commoning_set)
1851 flag_predictive_commoning = value;
1852 if (!flag_unswitch_loops_set)
1853 flag_unswitch_loops = value;
1854 if (!flag_gcse_after_reload_set)
1855 flag_gcse_after_reload = value;
1858 case OPT_fprofile_generate_:
1859 profile_data_prefix = xstrdup (arg);
1861 /* No break here - do -fprofile-generate processing. */
1862 case OPT_fprofile_generate:
1863 if (!profile_arc_flag_set)
1864 profile_arc_flag = value;
1865 if (!flag_profile_values_set)
1866 flag_profile_values = value;
1867 if (!flag_value_profile_transformations_set)
1868 flag_value_profile_transformations = value;
1869 if (!flag_inline_functions_set)
1870 flag_inline_functions = value;
1873 case OPT_fprofile_values:
1874 flag_profile_values_set = true;
1877 case OPT_fvisibility_:
1879 if (!strcmp(arg, "default"))
1880 default_visibility = VISIBILITY_DEFAULT;
1881 else if (!strcmp(arg, "internal"))
1882 default_visibility = VISIBILITY_INTERNAL;
1883 else if (!strcmp(arg, "hidden"))
1884 default_visibility = VISIBILITY_HIDDEN;
1885 else if (!strcmp(arg, "protected"))
1886 default_visibility = VISIBILITY_PROTECTED;
1888 error ("unrecognized visibility value \"%s\"", arg);
1893 flag_value_profile_transformations_set = true;
1896 case OPT_frandom_seed:
1897 /* The real switch is -fno-random-seed. */
1900 set_random_seed (NULL);
1903 case OPT_frandom_seed_:
1904 set_random_seed (arg);
1907 case OPT_fselective_scheduling:
1908 case OPT_fselective_scheduling2:
1909 sel_sched_switch_set = true;
1912 case OPT_fsched_verbose_:
1913 #ifdef INSN_SCHEDULING
1914 fix_sched_param ("verbose", arg);
1920 case OPT_fsched_stalled_insns_:
1921 flag_sched_stalled_insns = value;
1922 if (flag_sched_stalled_insns == 0)
1923 flag_sched_stalled_insns = -1;
1926 case OPT_fsched_stalled_insns_dep_:
1927 flag_sched_stalled_insns_dep = value;
1930 case OPT_fstack_check_:
1931 if (!strcmp (arg, "no"))
1932 flag_stack_check = NO_STACK_CHECK;
1933 else if (!strcmp (arg, "generic"))
1934 /* This is the old stack checking method. */
1935 flag_stack_check = STACK_CHECK_BUILTIN
1936 ? FULL_BUILTIN_STACK_CHECK
1937 : GENERIC_STACK_CHECK;
1938 else if (!strcmp (arg, "specific"))
1939 /* This is the new stack checking method. */
1940 flag_stack_check = STACK_CHECK_BUILTIN
1941 ? FULL_BUILTIN_STACK_CHECK
1942 : STACK_CHECK_STATIC_BUILTIN
1943 ? STATIC_BUILTIN_STACK_CHECK
1944 : GENERIC_STACK_CHECK;
1946 warning (0, "unknown stack check parameter \"%s\"", arg);
1949 case OPT_fstack_check:
1950 /* This is the same as the "specific" mode above. */
1952 flag_stack_check = STACK_CHECK_BUILTIN
1953 ? FULL_BUILTIN_STACK_CHECK
1954 : STACK_CHECK_STATIC_BUILTIN
1955 ? STATIC_BUILTIN_STACK_CHECK
1956 : GENERIC_STACK_CHECK;
1958 flag_stack_check = NO_STACK_CHECK;
1961 case OPT_fstack_limit:
1962 /* The real switch is -fno-stack-limit. */
1965 stack_limit_rtx = NULL_RTX;
1968 case OPT_fstack_limit_register_:
1970 int reg = decode_reg_name (arg);
1972 error ("unrecognized register name \"%s\"", arg);
1974 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
1978 case OPT_fstack_limit_symbol_:
1979 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
1982 case OPT_ftree_vectorizer_verbose_:
1983 vect_set_verbosity_level (arg);
1986 case OPT_ftls_model_:
1987 if (!strcmp (arg, "global-dynamic"))
1988 flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
1989 else if (!strcmp (arg, "local-dynamic"))
1990 flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
1991 else if (!strcmp (arg, "initial-exec"))
1992 flag_tls_default = TLS_MODEL_INITIAL_EXEC;
1993 else if (!strcmp (arg, "local-exec"))
1994 flag_tls_default = TLS_MODEL_LOCAL_EXEC;
1996 warning (0, "unknown tls-model \"%s\"", arg);
1999 case OPT_fira_algorithm_:
2000 if (!strcmp (arg, "CB"))
2001 flag_ira_algorithm = IRA_ALGORITHM_CB;
2002 else if (!strcmp (arg, "priority"))
2003 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
2005 warning (0, "unknown ira algorithm \"%s\"", arg);
2008 case OPT_fira_region_:
2009 if (!strcmp (arg, "one"))
2010 flag_ira_region = IRA_REGION_ONE;
2011 else if (!strcmp (arg, "all"))
2012 flag_ira_region = IRA_REGION_ALL;
2013 else if (!strcmp (arg, "mixed"))
2014 flag_ira_region = IRA_REGION_MIXED;
2016 warning (0, "unknown ira region \"%s\"", arg);
2019 case OPT_fira_verbose_:
2020 flag_ira_verbose = value;
2024 flag_tracer_set = true;
2028 flag_ipa_cp_set = true;
2031 case OPT_fipa_cp_clone:
2032 flag_ipa_cp_clone_set = true;
2035 case OPT_fpredictive_commoning:
2036 flag_predictive_commoning_set = true;
2039 case OPT_funswitch_loops:
2040 flag_unswitch_loops_set = true;
2043 case OPT_fgcse_after_reload:
2044 flag_gcse_after_reload_set = true;
2047 case OPT_funroll_loops:
2048 flag_unroll_loops_set = true;
2052 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
2056 set_debug_level (SDB_DEBUG, false, arg);
2060 if (value < 2 || value > 4)
2061 error ("dwarf version %d is not supported", value);
2063 dwarf_version = value;
2064 set_debug_level (DWARF2_DEBUG, false, "");
2068 set_debug_level (NO_DEBUG, 2, arg);
2073 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
2077 set_debug_level (VMS_DEBUG, false, arg);
2082 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
2086 asm_file_name = arg;
2089 case OPT_pedantic_errors:
2090 flag_pedantic_errors = pedantic = 1;
2094 case OPT_fcse_skip_blocks:
2095 case OPT_floop_optimize:
2096 case OPT_frerun_loop_opt:
2097 case OPT_fstrength_reduce:
2098 case OPT_ftree_store_copy_prop:
2099 case OPT_fforce_addr:
2100 case OPT_ftree_salias:
2101 case OPT_ftree_store_ccp:
2102 /* These are no-ops, preserved for backward compatibility. */
2106 /* If the flag was handled in a standard way, assume the lack of
2107 processing here is intentional. */
2108 gcc_assert (cl_options[scode].flag_var);
2115 /* Handle --param NAME=VALUE. */
2117 handle_param (const char *carg)
2122 arg = xstrdup (carg);
2123 equal = strchr (arg, '=');
2125 error ("%s: --param arguments should be of the form NAME=VALUE", arg);
2128 value = integral_argument (equal + 1);
2130 error ("invalid --param value %qs", equal + 1);
2134 set_param_value (arg, value);
2141 /* Used to set the level of strict aliasing warnings,
2142 when no level is specified (i.e., when -Wstrict-aliasing, and not
2143 -Wstrict-aliasing=level was given).
2144 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2145 and 0 otherwise. After calling this function, wstrict_aliasing will be
2146 set to the default value of -Wstrict_aliasing=level, currently 3. */
2148 set_Wstrict_aliasing (int onoff)
2150 gcc_assert (onoff == 0 || onoff == 1);
2152 warn_strict_aliasing = 3;
2154 warn_strict_aliasing = 0;
2157 /* The following routines are useful in setting all the flags that
2158 -ffast-math and -fno-fast-math imply. */
2160 set_fast_math_flags (int set)
2162 flag_unsafe_math_optimizations = set;
2163 set_unsafe_math_optimizations_flags (set);
2164 flag_finite_math_only = set;
2165 flag_errno_math = !set;
2168 flag_signaling_nans = 0;
2169 flag_rounding_math = 0;
2170 flag_cx_limited_range = 1;
2174 /* When -funsafe-math-optimizations is set the following
2175 flags are set as well. */
2177 set_unsafe_math_optimizations_flags (int set)
2179 flag_trapping_math = !set;
2180 flag_signed_zeros = !set;
2181 flag_associative_math = set;
2182 flag_reciprocal_math = set;
2185 /* Return true iff flags are set as if -ffast-math. */
2187 fast_math_flags_set_p (void)
2189 return (!flag_trapping_math
2190 && flag_unsafe_math_optimizations
2191 && flag_finite_math_only
2192 && !flag_signed_zeros
2193 && !flag_errno_math);
2196 /* Return true iff flags are set as if -ffast-math but using the flags stored
2197 in the struct cl_optimization structure. */
2199 fast_math_flags_struct_set_p (struct cl_optimization *opt)
2201 return (!opt->flag_trapping_math
2202 && opt->flag_unsafe_math_optimizations
2203 && opt->flag_finite_math_only
2204 && !opt->flag_signed_zeros
2205 && !opt->flag_errno_math);
2208 /* Handle a debug output -g switch. EXTENDED is true or false to support
2209 extended output (2 is special and means "-ggdb" was given). */
2211 set_debug_level (enum debug_info_type type, int extended, const char *arg)
2213 static bool type_explicit;
2215 use_gnu_debug_info_extensions = extended;
2217 if (type == NO_DEBUG)
2219 if (write_symbols == NO_DEBUG)
2221 write_symbols = PREFERRED_DEBUGGING_TYPE;
2225 #ifdef DWARF2_DEBUGGING_INFO
2226 write_symbols = DWARF2_DEBUG;
2227 #elif defined DBX_DEBUGGING_INFO
2228 write_symbols = DBX_DEBUG;
2232 if (write_symbols == NO_DEBUG)
2233 warning (0, "target system does not support debug output");
2238 /* Does it conflict with an already selected type? */
2239 if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
2240 error ("debug format \"%s\" conflicts with prior selection",
2241 debug_type_names[type]);
2242 write_symbols = type;
2243 type_explicit = true;
2246 /* A debug flag without a level defaults to level 2. */
2249 if (!debug_info_level)
2250 debug_info_level = DINFO_LEVEL_NORMAL;
2254 int argval = integral_argument (arg);
2256 error ("unrecognised debug output level \"%s\"", arg);
2257 else if (argval > 3)
2258 error ("debug output level %s is too high", arg);
2260 debug_info_level = (enum debug_info_level) argval;
2264 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2265 a simple on-off switch. */
2268 option_enabled (int opt_idx)
2270 const struct cl_option *option = &(cl_options[opt_idx]);
2272 if (option->flag_var)
2273 switch (option->var_type)
2276 return *(int *) option->flag_var != 0;
2279 return *(int *) option->flag_var == option->var_value;
2281 case CLVC_BIT_CLEAR:
2282 return (*(int *) option->flag_var & option->var_value) == 0;
2285 return (*(int *) option->flag_var & option->var_value) != 0;
2293 /* Fill STATE with the current state of option OPTION. Return true if
2294 there is some state to store. */
2297 get_option_state (int option, struct cl_option_state *state)
2299 if (cl_options[option].flag_var == 0)
2302 switch (cl_options[option].var_type)
2306 state->data = cl_options[option].flag_var;
2307 state->size = sizeof (int);
2310 case CLVC_BIT_CLEAR:
2312 state->ch = option_enabled (option);
2313 state->data = &state->ch;
2318 state->data = *(const char **) cl_options[option].flag_var;
2319 if (state->data == 0)
2321 state->size = strlen ((const char *) state->data) + 1;
2327 /* Set *OPTION according to VALUE and ARG. */
2330 set_option (const struct cl_option *option, int value, const char *arg)
2332 if (!option->flag_var)
2335 switch (option->var_type)
2338 *(int *) option->flag_var = value;
2342 *(int *) option->flag_var = (value
2344 : !option->var_value);
2347 case CLVC_BIT_CLEAR:
2349 if ((value != 0) == (option->var_type == CLVC_BIT_SET))
2350 *(int *) option->flag_var |= option->var_value;
2352 *(int *) option->flag_var &= ~option->var_value;
2353 if (option->flag_var == &target_flags)
2354 target_flags_explicit |= option->var_value;
2358 *(const char **) option->flag_var = arg;
2363 /* Enable a warning option as an error. This is used by -Werror= and
2364 also by legacy Werror-implicit-function-declaration. */
2367 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask)
2372 new_option = XNEWVEC (char, strlen (arg) + 2);
2373 new_option[0] = 'W';
2374 strcpy (new_option + 1, arg);
2375 option_index = find_opt (new_option, lang_mask);
2376 if (option_index == N_OPTS)
2378 error ("-Werror=%s: No option -%s", arg, new_option);
2382 diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2383 diagnostic_classify_diagnostic (global_dc, option_index, kind);
2385 /* -Werror=foo implies -Wfoo. */
2386 if (cl_options[option_index].var_type == CLVC_BOOLEAN
2387 && cl_options[option_index].flag_var
2388 && kind == DK_ERROR)
2389 *(int *) cl_options[option_index].flag_var = 1;