1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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 "opts-diagnostic.h"
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 bool common_handle_option (const struct cl_decoded_option *decoded,
375 unsigned int lang_mask, int kind,
376 const struct cl_option_handlers *handlers);
377 static void handle_param (const char *);
378 static char *write_langs (unsigned int lang_mask);
379 static void complain_wrong_lang (const struct cl_decoded_option *,
380 unsigned int lang_mask);
381 static void set_debug_level (enum debug_info_type type, int extended,
384 /* Return a malloced slash-separated list of languages in MASK. */
386 write_langs (unsigned int mask)
388 unsigned int n = 0, len = 0;
389 const char *lang_name;
392 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
393 if (mask & (1U << n))
394 len += strlen (lang_name) + 1;
396 result = XNEWVEC (char, len);
398 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
399 if (mask & (1U << n))
403 strcpy (result + len, lang_name);
404 len += strlen (lang_name);
412 /* Complain that switch DECODED does not apply to this front end (mask
415 complain_wrong_lang (const struct cl_decoded_option *decoded,
416 unsigned int lang_mask)
418 const struct cl_option *option = &cl_options[decoded->opt_index];
419 const char *text = decoded->orig_option_with_args_text;
420 char *ok_langs = NULL, *bad_lang = NULL;
421 unsigned int opt_flags = option->flags;
423 if (!lang_hooks.complain_wrong_lang_p (option))
426 opt_flags &= ((1U << cl_lang_count) - 1) | CL_DRIVER;
427 if (opt_flags != CL_DRIVER)
428 ok_langs = write_langs (opt_flags);
429 if (lang_mask != CL_DRIVER)
430 bad_lang = write_langs (lang_mask);
432 if (opt_flags == CL_DRIVER)
433 error ("command line option %qs is valid for the driver but not for %s",
435 else if (lang_mask == CL_DRIVER)
438 /* Eventually this should become a hard error IMO. */
439 warning (0, "command line option %qs is valid for %s but not for %s",
440 text, ok_langs, bad_lang);
446 /* Buffer the unknown option described by the string OPT. Currently,
447 we only complain about unknown -Wno-* options if they may have
448 prevented a diagnostic. Otherwise, we just ignore them.
449 Note that if we do complain, it is only as a warning, not an error;
450 passing the compiler an unrecognised -Wno-* option should never
451 change whether the compilation succeeds or fails. */
453 static void postpone_unknown_option_warning(const char *opt)
455 VEC_safe_push (const_char_p, heap, ignored_options, opt);
458 /* Produce a warning for each option previously buffered. */
460 void print_ignored_options (void)
462 location_t saved_loc = input_location;
466 while (!VEC_empty (const_char_p, ignored_options))
469 opt = VEC_pop (const_char_p, ignored_options);
470 warning (0, "unrecognized command line option \"%s\"", opt);
473 input_location = saved_loc;
476 /* Handle an unknown option DECODED, returning true if an error should be
480 unknown_option_callback (const struct cl_decoded_option *decoded)
482 const char *opt = decoded->arg;
484 if (opt[1] == 'W' && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-'
485 && !(decoded->errors & CL_ERR_NEGATIVE))
487 /* We don't generate warnings for unknown -Wno-* options unless
488 we issue diagnostics. */
489 postpone_unknown_option_warning (opt);
496 /* Note that an option DECODED has been successfully handled with a
497 handler for mask MASK. */
500 post_handling_callback (const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED,
501 unsigned int mask ATTRIBUTE_UNUSED)
504 lto_register_user_option (decoded->opt_index, decoded->arg,
505 decoded->value, mask);
509 /* Handle a front-end option; arguments and return value as for
513 lang_handle_option (const struct cl_decoded_option *decoded,
514 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
515 const struct cl_option_handlers *handlers)
517 gcc_assert (decoded->canonical_option_num_elements <= 2);
518 return lang_hooks.handle_option (decoded->opt_index, decoded->arg,
519 decoded->value, kind, handlers);
522 /* Handle a back-end option; arguments and return value as for
526 target_handle_option (const struct cl_decoded_option *decoded,
527 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
528 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
530 gcc_assert (decoded->canonical_option_num_elements <= 2);
531 gcc_assert (kind == DK_UNSPECIFIED);
532 return targetm.handle_option (decoded->opt_index, decoded->arg,
536 /* Handle FILENAME from the command line. */
538 add_input_filename (const char *filename)
541 in_fnames = XRESIZEVEC (const char *, in_fnames, num_in_fnames);
542 in_fnames[num_in_fnames - 1] = filename;
545 /* Add comma-separated strings to a char_p vector. */
548 add_comma_separated_to_vector (VEC(char_p,heap) **pvec, const char* arg)
555 /* We never free this string. */
568 VEC_safe_push (char_p, heap, *pvec, token_start);
571 if (*r == '\\' && r[1] == ',')
579 if (*token_start != '\0')
580 VEC_safe_push (char_p, heap, *pvec, token_start);
583 /* Return whether we should exclude FNDECL from instrumentation. */
586 flag_instrument_functions_exclude_p (tree fndecl)
588 if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0)
594 name = lang_hooks.decl_printable_name (fndecl, 0);
595 FOR_EACH_VEC_ELT (char_p, flag_instrument_functions_exclude_functions,
597 if (strstr (name, s) != NULL)
601 if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0)
607 name = DECL_SOURCE_FILE (fndecl);
608 FOR_EACH_VEC_ELT (char_p, flag_instrument_functions_exclude_files, i, s)
609 if (strstr (name, s) != NULL)
617 /* Handle the vector of command line options. LANG_MASK
618 contains has a single bit set representing the current
619 language. HANDLERS describes what functions to call for the options. */
621 read_cmdline_options (struct cl_decoded_option *decoded_options,
622 unsigned int decoded_options_count,
623 unsigned int lang_mask,
624 const struct cl_option_handlers *handlers)
628 for (i = 1; i < decoded_options_count; i++)
630 if (decoded_options[i].opt_index == OPT_SPECIAL_input_file)
632 if (main_input_filename == NULL)
634 main_input_filename = decoded_options[i].arg;
635 main_input_baselength
636 = base_of_path (main_input_filename, &main_input_basename);
638 add_input_filename (decoded_options[i].arg);
642 read_cmdline_option (decoded_options + i, lang_mask, handlers);
646 /* Parse command line options and set default flag values. Do minimal
647 options processing. The decoded options are placed in *DECODED_OPTIONS
648 and *DECODED_OPTIONS_COUNT. */
650 decode_options (unsigned int argc, const char **argv,
651 struct cl_decoded_option **decoded_options,
652 unsigned int *decoded_options_count)
654 static bool first_time_p = true;
655 static int initial_min_crossjump_insns;
656 static int initial_max_fields_for_field_sensitive;
657 static int initial_loop_invariant_max_bbs_in_loop;
658 static unsigned int initial_lang_mask;
659 struct cl_option_handlers handlers;
661 unsigned int i, lang_mask;
670 /* Perform language-specific options initialization. */
671 initial_lang_mask = lang_mask = lang_hooks.option_lang_mask ();
673 lang_hooks.initialize_diagnostics (global_dc);
675 /* Save initial values of parameters we reset. */
676 initial_min_crossjump_insns
677 = compiler_params[PARAM_MIN_CROSSJUMP_INSNS].value;
678 initial_max_fields_for_field_sensitive
679 = compiler_params[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE].value;
680 initial_loop_invariant_max_bbs_in_loop
681 = compiler_params[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP].value;
684 lang_mask = initial_lang_mask;
686 decode_cmdline_options_to_array (argc, argv,
687 lang_mask | CL_COMMON | CL_TARGET,
688 decoded_options, decoded_options_count);
690 /* Perform language-specific options initialization. */
691 lang_hooks.init_options (*decoded_options_count, *decoded_options);
693 handlers.unknown_option_callback = unknown_option_callback;
694 handlers.wrong_lang_callback = complain_wrong_lang;
695 handlers.post_handling_callback = post_handling_callback;
696 handlers.num_handlers = 3;
697 handlers.handlers[0].handler = lang_handle_option;
698 handlers.handlers[0].mask = lang_mask;
699 handlers.handlers[1].handler = common_handle_option;
700 handlers.handlers[1].mask = CL_COMMON;
701 handlers.handlers[2].handler = target_handle_option;
702 handlers.handlers[2].mask = CL_TARGET;
704 /* Scan to see what optimization level has been specified. That will
705 determine the default value of many flags. */
706 for (i = 1; i < *decoded_options_count; i++)
708 struct cl_decoded_option *opt = &(*decoded_options)[i];
709 switch (opt->opt_index)
712 if (*opt->arg == '\0')
720 const int optimize_val = integral_argument (opt->arg);
721 if (optimize_val == -1)
722 error ("argument to %qs should be a non-negative integer",
726 optimize = optimize_val;
727 if ((unsigned int) optimize > 255)
738 /* Optimizing for size forces optimize to be 2. */
744 /* -Ofast only adds flags to -O3. */
751 /* Ignore other options in this prescan. */
756 /* Use priority coloring if cover classes is not defined for the
758 if (targetm.ira_cover_classes == NULL)
759 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
761 /* -O1 optimizations. */
762 opt1 = (optimize >= 1);
763 flag_defer_pop = opt1;
765 flag_delayed_branch = opt1;
767 #ifdef CAN_DEBUG_WITHOUT_FP
768 flag_omit_frame_pointer = opt1;
770 flag_guess_branch_prob = opt1;
771 flag_cprop_registers = opt1;
772 flag_forward_propagate = opt1;
773 flag_if_conversion = opt1;
774 flag_if_conversion2 = opt1;
775 flag_ipa_pure_const = opt1;
776 flag_ipa_reference = opt1;
777 flag_ipa_profile = opt1;
778 flag_merge_constants = opt1;
779 flag_split_wide_types = opt1;
780 flag_tree_ccp = opt1;
781 flag_tree_bit_ccp = opt1;
782 flag_tree_dce = opt1;
783 flag_tree_dom = opt1;
784 flag_tree_dse = opt1;
785 flag_tree_ter = opt1;
786 flag_tree_sra = opt1;
787 flag_tree_copyrename = opt1;
788 flag_tree_fre = opt1;
789 flag_tree_copy_prop = opt1;
790 flag_tree_sink = opt1;
793 /* -O2 optimizations. */
794 opt2 = (optimize >= 2);
795 flag_inline_small_functions = opt2;
796 flag_indirect_inlining = opt2;
797 flag_partial_inlining = opt2;
798 flag_thread_jumps = opt2;
799 flag_crossjumping = opt2;
800 flag_optimize_sibling_calls = opt2;
801 flag_cse_follow_jumps = opt2;
803 flag_expensive_optimizations = opt2;
804 flag_rerun_cse_after_loop = opt2;
805 flag_caller_saves = opt2;
806 flag_peephole2 = opt2;
807 #ifdef INSN_SCHEDULING
808 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
809 flag_schedule_insns = opt2 && ! optimize_size;
810 flag_schedule_insns_after_reload = opt2;
813 flag_strict_aliasing = opt2;
814 flag_strict_overflow = opt2;
815 flag_reorder_blocks = opt2;
816 flag_reorder_functions = opt2;
817 flag_tree_vrp = opt2;
818 flag_tree_builtin_call_dce = opt2;
819 flag_tree_pre = opt2;
820 flag_tree_switch_conversion = opt2;
824 /* Track fields in field-sensitive alias analysis. */
825 set_param_value ("max-fields-for-field-sensitive",
826 (opt2) ? 100 : initial_max_fields_for_field_sensitive);
828 /* For -O1 only do loop invariant motion for very small loops. */
829 set_param_value ("loop-invariant-max-bbs-in-loop",
830 (opt2) ? initial_loop_invariant_max_bbs_in_loop : 1000);
832 /* -O3 optimizations. */
833 opt3 = (optimize >= 3);
834 flag_tree_loop_distribute_patterns = opt3;
835 flag_predictive_commoning = opt3;
836 flag_inline_functions = opt3;
837 flag_unswitch_loops = opt3;
838 flag_gcse_after_reload = opt3;
839 flag_tree_vectorize = opt3;
840 flag_ipa_cp_clone = opt3;
841 if (flag_ipa_cp_clone)
844 /* Just -O1/-O0 optimizations. */
845 opt1_max = (optimize <= 1);
846 align_loops = opt1_max;
847 align_jumps = opt1_max;
848 align_labels = opt1_max;
849 align_functions = opt1_max;
853 /* Inlining of functions reducing size is a good idea regardless of them
854 being declared inline. */
855 flag_inline_functions = 1;
857 /* Basic optimization options. */
862 /* We want to crossjump as much as possible. */
863 set_param_value ("min-crossjump-insns", 1);
866 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns);
868 /* -Ofast adds optimizations to -O3. */
871 /* Which is -ffast-math for now. */
872 set_fast_math_flags (1);
873 /* Allow targets to enable extra options with -Ofast
874 before general options processing so disabling them
875 again afterwards works. */
876 targetm.handle_ofast ();
879 /* Enable -Werror=coverage-mismatch by default */
880 enable_warning_as_error ("coverage-mismatch", 1, lang_mask, &handlers);
884 /* Initialize whether `char' is signed. */
885 flag_signed_char = DEFAULT_SIGNED_CHAR;
886 /* Set this to a special "uninitialized" value. The actual default is
887 set after target options have been processed. */
888 flag_short_enums = 2;
890 /* Initialize target_flags before
891 targetm.target_option.optimization so the latter can modify
893 target_flags = targetm.default_target_flags;
895 /* Some targets have ABI-specified unwind tables. */
896 flag_unwind_tables = targetm.unwind_tables_default;
900 /* Clear any options currently held for LTO. */
901 lto_clear_user_options ();
904 /* Allow default optimizations to be specified on a per-machine basis. */
905 targetm.target_option.optimization (optimize, optimize_size);
907 read_cmdline_options (*decoded_options, *decoded_options_count, lang_mask,
910 if (dump_base_name && ! IS_ABSOLUTE_PATH (dump_base_name))
912 /* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
913 directory. Then try to make DUMP_BASE_NAME relative to the
914 AUX_BASE_NAME directory, typically the directory to contain
917 dump_base_name = concat (dump_dir_name, dump_base_name, NULL);
918 else if (aux_base_name)
920 const char *aux_base;
922 base_of_path (aux_base_name, &aux_base);
923 if (aux_base_name != aux_base)
925 int dir_len = aux_base - aux_base_name;
926 char *new_dump_base_name =
927 XNEWVEC (char, strlen(dump_base_name) + dir_len + 1);
929 /* Copy directory component from AUX_BASE_NAME. */
930 memcpy (new_dump_base_name, aux_base_name, dir_len);
931 /* Append existing DUMP_BASE_NAME. */
932 strcpy (new_dump_base_name + dir_len, dump_base_name);
933 dump_base_name = new_dump_base_name;
938 /* Handle related options for unit-at-a-time, toplevel-reorder, and
940 if (!flag_unit_at_a_time)
942 if (flag_section_anchors == 1)
943 error ("Section anchors must be disabled when unit-at-a-time "
945 flag_section_anchors = 0;
946 if (flag_toplevel_reorder == 1)
947 error ("Toplevel reorder must be disabled when unit-at-a-time "
949 flag_toplevel_reorder = 0;
952 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
953 if (warn_missing_noreturn)
954 warn_suggest_attribute_noreturn = true;
956 /* Unless the user has asked for section anchors, we disable toplevel
957 reordering at -O0 to disable transformations that might be surprising
958 to end users and to get -fno-toplevel-reorder tested. */
959 if (!optimize && flag_toplevel_reorder == 2 && flag_section_anchors != 1)
961 flag_toplevel_reorder = 0;
962 flag_section_anchors = 0;
964 if (!flag_toplevel_reorder)
966 if (flag_section_anchors == 1)
967 error ("section anchors must be disabled when toplevel reorder"
969 flag_section_anchors = 0;
976 if (flag_pic && !flag_pie)
978 first_time_p = false;
983 /* Inlining does not work if not optimizing,
984 so force it not to be done. */
989 /* The optimization to partition hot and cold basic blocks into separate
990 sections of the .o and executable files does not work (currently)
991 with exception handling. This is because there is no support for
992 generating unwind info. If flag_exceptions is turned on we need to
993 turn off the partitioning optimization. */
995 if (flag_exceptions && flag_reorder_blocks_and_partition
996 && (USING_SJLJ_EXCEPTIONS
997 #ifdef TARGET_UNWIND_INFO
1002 inform (input_location,
1003 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1004 flag_reorder_blocks_and_partition = 0;
1005 flag_reorder_blocks = 1;
1008 /* If user requested unwind info, then turn off the partitioning
1011 if (flag_unwind_tables && ! targetm.unwind_tables_default
1012 && flag_reorder_blocks_and_partition
1013 && (USING_SJLJ_EXCEPTIONS
1014 #ifdef TARGET_UNWIND_INFO
1019 inform (input_location,
1020 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1021 flag_reorder_blocks_and_partition = 0;
1022 flag_reorder_blocks = 1;
1025 /* If the target requested unwind info, then turn off the partitioning
1026 optimization with a different message. Likewise, if the target does not
1027 support named sections. */
1029 if (flag_reorder_blocks_and_partition
1030 && (!targetm.have_named_sections
1031 || (flag_unwind_tables && targetm.unwind_tables_default
1032 && (USING_SJLJ_EXCEPTIONS
1033 #ifdef TARGET_UNWIND_INFO
1038 inform (input_location,
1039 "-freorder-blocks-and-partition does not work on this architecture");
1040 flag_reorder_blocks_and_partition = 0;
1041 flag_reorder_blocks = 1;
1044 /* Pipelining of outer loops is only possible when general pipelining
1045 capabilities are requested. */
1046 if (!flag_sel_sched_pipelining)
1047 flag_sel_sched_pipelining_outer_loops = 0;
1049 if (!targetm.ira_cover_classes
1050 && flag_ira_algorithm == IRA_ALGORITHM_CB)
1052 inform (input_location,
1053 "-fira-algorithm=CB does not work on this architecture");
1054 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
1057 if (flag_conserve_stack)
1059 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME))
1060 PARAM_VALUE (PARAM_LARGE_STACK_FRAME) = 100;
1061 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH))
1062 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH) = 40;
1064 if (flag_wpa || flag_ltrans)
1066 /* These passes are not WHOPR compatible yet. */
1068 flag_ipa_struct_reorg = 0;
1071 if (flag_lto || flag_whopr)
1074 flag_generate_lto = 1;
1076 /* When generating IL, do not operate in whole-program mode.
1077 Otherwise, symbols will be privatized too early, causing link
1079 flag_whole_program = 0;
1081 error ("LTO support has not been enabled in this configuration");
1085 /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
1086 check option consistency. */
1087 if (flag_lto && flag_whopr)
1088 error ("-flto and -fwhopr are mutually exclusive");
1090 /* We initialize flag_split_stack to -1 so that targets can set a
1091 default value if they choose based on other options. */
1092 if (flag_split_stack == -1)
1093 flag_split_stack = 0;
1096 if (!targetm.supports_split_stack (true))
1098 error ("%<-fsplit-stack%> is not supported by "
1099 "this compiler configuration");
1100 flag_split_stack = 0;
1105 #define LEFT_COLUMN 27
1107 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1108 followed by word-wrapped HELP in a second column. */
1110 wrap_help (const char *help,
1112 unsigned int item_width,
1113 unsigned int columns)
1115 unsigned int col_width = LEFT_COLUMN;
1116 unsigned int remaining, room, len;
1118 remaining = strlen (help);
1122 room = columns - 3 - MAX (col_width, item_width);
1131 for (i = 0; help[i]; i++)
1133 if (i >= room && len != remaining)
1137 else if ((help[i] == '-' || help[i] == '/')
1138 && help[i + 1] != ' '
1139 && i > 0 && ISALPHA (help[i - 1]))
1144 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
1146 while (help[len] == ' ')
1154 /* Print help for a specific front-end, etc. */
1156 print_filtered_help (unsigned int include_flags,
1157 unsigned int exclude_flags,
1158 unsigned int any_flags,
1159 unsigned int columns)
1163 static char *printed = NULL;
1165 bool displayed = false;
1167 if (include_flags == CL_PARAMS)
1169 for (i = 0; i < LAST_PARAM; i++)
1171 const char *param = compiler_params[i].option;
1173 help = compiler_params[i].help;
1174 if (help == NULL || *help == '\0')
1176 if (exclude_flags & CL_UNDOCUMENTED)
1178 help = undocumented_msg;
1181 /* Get the translation. */
1184 wrap_help (help, param, strlen (param), columns);
1191 printed = XCNEWVAR (char, cl_options_count);
1193 for (i = 0; i < cl_options_count; i++)
1195 static char new_help[128];
1196 const struct cl_option *option = cl_options + i;
1201 if (include_flags == 0
1202 || ((option->flags & include_flags) != include_flags))
1204 if ((option->flags & any_flags) == 0)
1208 /* Skip unwanted switches. */
1209 if ((option->flags & exclude_flags) != 0)
1212 /* The driver currently prints its own help text. */
1213 if ((option->flags & CL_DRIVER) != 0
1214 && (option->flags & (((1U << cl_lang_count) - 1)
1215 | CL_COMMON | CL_TARGET)) == 0)
1219 /* Skip switches that have already been printed. */
1225 help = option->help;
1228 if (exclude_flags & CL_UNDOCUMENTED)
1230 help = undocumented_msg;
1233 /* Get the translation. */
1236 /* Find the gap between the name of the
1237 option and its descriptive text. */
1238 tab = strchr (help, '\t');
1247 opt = option->opt_text;
1251 /* With the -Q option enabled we change the descriptive text associated
1252 with an option to be an indication of its current setting. */
1255 if (len < (LEFT_COLUMN + 2))
1256 strcpy (new_help, "\t\t");
1258 strcpy (new_help, "\t");
1260 if (option->flag_var != NULL)
1262 if (option->flags & CL_JOINED)
1264 if (option->var_type == CLVC_STRING)
1266 if (* (const char **) option->flag_var != NULL)
1267 snprintf (new_help + strlen (new_help),
1268 sizeof (new_help) - strlen (new_help),
1269 * (const char **) option->flag_var);
1272 sprintf (new_help + strlen (new_help),
1273 "%#x", * (int *) option->flag_var);
1276 strcat (new_help, option_enabled (i)
1277 ? _("[enabled]") : _("[disabled]"));
1283 wrap_help (help, opt, len, columns);
1289 unsigned int langs = include_flags & CL_LANG_ALL;
1292 printf (_(" No options with the desired characteristics were found\n"));
1297 /* PR 31349: Tell the user how to see all of the
1298 options supported by a specific front end. */
1299 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1300 if ((1U << i) & langs)
1301 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1302 lang_names[i], lang_names[i]);
1306 else if (! displayed)
1307 printf (_(" All options with the desired characteristics have already been displayed\n"));
1312 /* Display help for a specified type of option.
1313 The options must have ALL of the INCLUDE_FLAGS set
1314 ANY of the flags in the ANY_FLAGS set
1315 and NONE of the EXCLUDE_FLAGS set. */
1317 print_specific_help (unsigned int include_flags,
1318 unsigned int exclude_flags,
1319 unsigned int any_flags)
1321 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1322 const char * description = NULL;
1323 const char * descrip_extra = "";
1326 static unsigned int columns = 0;
1328 /* Sanity check: Make sure that we do not have more
1329 languages than we have bits available to enumerate them. */
1330 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1332 /* If we have not done so already, obtain
1333 the desired maximum width of the output. */
1338 GET_ENVIRONMENT (p, "COLUMNS");
1341 int value = atoi (p);
1348 /* Use a reasonable default. */
1352 /* Decide upon the title for the options that we are going to display. */
1353 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1355 switch (flag & include_flags)
1362 description = _("The following options are target specific");
1365 description = _("The following options control compiler warning messages");
1367 case CL_OPTIMIZATION:
1368 description = _("The following options control optimizations");
1371 description = _("The following options are language-independent");
1374 description = _("The --param option recognizes the following as parameters");
1377 if (i >= cl_lang_count)
1379 if (exclude_flags & all_langs_mask)
1380 description = _("The following options are specific to just the language ");
1382 description = _("The following options are supported by the language ");
1383 descrip_extra = lang_names [i];
1388 if (description == NULL)
1392 if (include_flags & CL_UNDOCUMENTED)
1393 description = _("The following options are not documented");
1394 else if (include_flags & CL_SEPARATE)
1395 description = _("The following options take separate arguments");
1396 else if (include_flags & CL_JOINED)
1397 description = _("The following options take joined arguments");
1400 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1407 if (any_flags & all_langs_mask)
1408 description = _("The following options are language-related");
1410 description = _("The following options are language-independent");
1414 printf ("%s%s:\n", description, descrip_extra);
1415 print_filtered_help (include_flags, exclude_flags, any_flags, columns);
1418 /* Handle target- and language-independent options. Return zero to
1419 generate an "unknown option" message. Only options that need
1420 extra handling need to be listed here; if you simply want
1421 DECODED->value assigned to a variable, it happens automatically. */
1424 common_handle_option (const struct cl_decoded_option *decoded,
1425 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1426 const struct cl_option_handlers *handlers)
1428 size_t scode = decoded->opt_index;
1429 const char *arg = decoded->arg;
1430 int value = decoded->value;
1431 static bool verbose = false;
1432 enum opt_code code = (enum opt_code) scode;
1434 gcc_assert (decoded->canonical_option_num_elements <= 2);
1448 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1449 unsigned int undoc_mask;
1452 undoc_mask = (verbose | extra_warnings) ? 0 : CL_UNDOCUMENTED;
1453 /* First display any single language specific options. */
1454 for (i = 0; i < cl_lang_count; i++)
1456 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
1457 /* Next display any multi language specific options. */
1458 print_specific_help (0, undoc_mask, all_langs_mask);
1459 /* Then display any remaining, non-language options. */
1460 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1462 print_specific_help (i, undoc_mask, 0);
1463 exit_after_options = true;
1467 case OPT__target_help:
1468 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
1469 exit_after_options = true;
1471 /* Allow the target a chance to give the user some additional information. */
1478 const char * a = arg;
1479 unsigned int include_flags = 0;
1480 /* Note - by default we include undocumented options when listing
1481 specific classes. If you only want to see documented options
1482 then add ",^undocumented" to the --help= option. E.g.:
1484 --help=target,^undocumented */
1485 unsigned int exclude_flags = 0;
1487 /* Walk along the argument string, parsing each word in turn.
1489 arg = [^]{word}[,{arg}]
1490 word = {optimizers|target|warnings|undocumented|
1491 params|common|<language>} */
1496 const char * string;
1501 { "optimizers", CL_OPTIMIZATION },
1502 { "target", CL_TARGET },
1503 { "warnings", CL_WARNING },
1504 { "undocumented", CL_UNDOCUMENTED },
1505 { "params", CL_PARAMS },
1506 { "joined", CL_JOINED },
1507 { "separate", CL_SEPARATE },
1508 { "common", CL_COMMON },
1511 unsigned int * pflags;
1513 unsigned int lang_flag, specific_flag;
1520 pflags = & exclude_flags;
1523 pflags = & include_flags;
1525 comma = strchr (a, ',');
1536 /* Check to see if the string matches an option class name. */
1537 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1538 if (strncasecmp (a, specifics[i].string, len) == 0)
1540 specific_flag = specifics[i].flag;
1544 /* Check to see if the string matches a language name.
1545 Note - we rely upon the alpha-sorted nature of the entries in
1546 the lang_names array, specifically that shorter names appear
1547 before their longer variants. (i.e. C before C++). That way
1548 when we are attempting to match --help=c for example we will
1549 match with C first and not C++. */
1550 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1551 if (strncasecmp (a, lang_names[i], len) == 0)
1553 lang_flag = 1U << i;
1557 if (specific_flag != 0)
1560 * pflags |= specific_flag;
1563 /* The option's argument matches both the start of a
1564 language name and the start of an option class name.
1565 We have a special case for when the user has
1566 specified "--help=c", but otherwise we have to issue
1568 if (strncasecmp (a, "c", len) == 0)
1569 * pflags |= lang_flag;
1572 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1576 else if (lang_flag != 0)
1577 * pflags |= lang_flag;
1580 "warning: unrecognized argument to --help= option: %.*s\n",
1589 print_specific_help (include_flags, exclude_flags, 0);
1590 exit_after_options = true;
1595 exit_after_options = true;
1601 /* Currently handled in a prescan. */
1605 enable_warning_as_error (arg, value, lang_mask, handlers);
1608 case OPT_Wlarger_than_:
1609 larger_than_size = value;
1610 warn_larger_than = value != -1;
1613 case OPT_Wfatal_errors:
1614 global_dc->fatal_errors = value;
1617 case OPT_Wframe_larger_than_:
1618 frame_larger_than_size = value;
1619 warn_frame_larger_than = value != -1;
1622 case OPT_Wstrict_aliasing:
1623 set_Wstrict_aliasing (value);
1626 case OPT_Wstrict_aliasing_:
1627 warn_strict_aliasing = value;
1630 case OPT_Wstrict_overflow:
1631 warn_strict_overflow = (value
1632 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1636 case OPT_Wstrict_overflow_:
1637 warn_strict_overflow = value;
1640 case OPT_Wsystem_headers:
1641 global_dc->warn_system_headers = value;
1645 warn_unused = value;
1649 aux_info_file_name = arg;
1650 flag_gen_aux_info = 1;
1654 aux_base_name = arg;
1657 case OPT_auxbase_strip:
1659 char *tmp = xstrdup (arg);
1660 strip_off_ending (tmp, strlen (tmp));
1662 aux_base_name = tmp;
1667 decode_d_option (arg);
1671 dump_base_name = arg;
1675 dump_dir_name = arg;
1678 case OPT_falign_functions_:
1679 align_functions = value;
1682 case OPT_falign_jumps_:
1683 align_jumps = value;
1686 case OPT_falign_labels_:
1687 align_labels = value;
1690 case OPT_falign_loops_:
1691 align_loops = value;
1694 case OPT_fbranch_probabilities:
1695 flag_branch_probabilities_set = true;
1698 case OPT_fcall_used_:
1699 fix_register (arg, 0, 1);
1702 case OPT_fcall_saved_:
1703 fix_register (arg, 0, 0);
1707 dbg_cnt_process_opt (arg);
1710 case OPT_fdbg_cnt_list:
1711 dbg_cnt_list_all_counters ();
1714 case OPT_fdebug_prefix_map_:
1715 add_debug_prefix_map (arg);
1718 case OPT_fdiagnostics_show_location_:
1719 if (!strcmp (arg, "once"))
1720 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1721 else if (!strcmp (arg, "every-line"))
1722 diagnostic_prefixing_rule (global_dc)
1723 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1728 case OPT_fdiagnostics_show_option:
1729 global_dc->show_option_requested = value;
1733 if (!dump_switch_p (arg))
1737 case OPT_fexcess_precision_:
1738 if (!strcmp (arg, "fast"))
1739 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
1740 else if (!strcmp (arg, "standard"))
1741 flag_excess_precision_cmdline = EXCESS_PRECISION_STANDARD;
1743 error ("unknown excess precision style \"%s\"", arg);
1746 case OPT_ffast_math:
1747 set_fast_math_flags (value);
1750 case OPT_funsafe_math_optimizations:
1751 set_unsafe_math_optimizations_flags (value);
1755 fix_register (arg, 1, 1);
1758 case OPT_finline_limit_:
1759 set_param_value ("max-inline-insns-single", value / 2);
1760 set_param_value ("max-inline-insns-auto", value / 2);
1763 case OPT_finstrument_functions_exclude_function_list_:
1764 add_comma_separated_to_vector
1765 (&flag_instrument_functions_exclude_functions, arg);
1768 case OPT_finstrument_functions_exclude_file_list_:
1769 add_comma_separated_to_vector
1770 (&flag_instrument_functions_exclude_files, arg);
1773 case OPT_fmessage_length_:
1774 pp_set_line_maximum_length (global_dc->printer, value);
1777 case OPT_fpack_struct_:
1778 if (value <= 0 || (value & (value - 1)) || value > 16)
1779 error ("structure alignment must be a small power of two, not %d", value);
1782 initial_max_fld_align = value;
1783 maximum_field_alignment = value * BITS_PER_UNIT;
1787 case OPT_fpeel_loops:
1788 flag_peel_loops_set = true;
1792 #ifdef ENABLE_PLUGIN
1793 add_new_plugin (arg);
1795 error ("Plugin support is disabled. Configure with --enable-plugin.");
1799 case OPT_fplugin_arg_:
1800 #ifdef ENABLE_PLUGIN
1801 parse_plugin_arg_opt (arg);
1803 error ("Plugin support is disabled. Configure with --enable-plugin.");
1807 case OPT_fprofile_arcs:
1808 profile_arc_flag_set = true;
1811 case OPT_finline_functions:
1812 flag_inline_functions_set = true;
1815 case OPT_fprofile_dir_:
1816 profile_data_prefix = xstrdup (arg);
1819 case OPT_fprofile_use_:
1820 profile_data_prefix = xstrdup (arg);
1821 flag_profile_use = true;
1823 /* No break here - do -fprofile-use processing. */
1824 case OPT_fprofile_use:
1825 if (!flag_branch_probabilities_set)
1826 flag_branch_probabilities = value;
1827 if (!flag_profile_values_set)
1828 flag_profile_values = value;
1829 if (!flag_unroll_loops_set)
1830 flag_unroll_loops = value;
1831 if (!flag_peel_loops_set)
1832 flag_peel_loops = value;
1833 if (!flag_tracer_set)
1834 flag_tracer = value;
1835 if (!flag_value_profile_transformations_set)
1836 flag_value_profile_transformations = value;
1837 if (!flag_inline_functions_set)
1838 flag_inline_functions = value;
1839 if (!flag_ipa_cp_set)
1840 flag_ipa_cp = value;
1841 if (!flag_ipa_cp_clone_set
1842 && value && flag_ipa_cp)
1843 flag_ipa_cp_clone = value;
1844 if (!flag_predictive_commoning_set)
1845 flag_predictive_commoning = value;
1846 if (!flag_unswitch_loops_set)
1847 flag_unswitch_loops = value;
1848 if (!flag_gcse_after_reload_set)
1849 flag_gcse_after_reload = value;
1852 case OPT_fprofile_generate_:
1853 profile_data_prefix = xstrdup (arg);
1855 /* No break here - do -fprofile-generate processing. */
1856 case OPT_fprofile_generate:
1857 if (!profile_arc_flag_set)
1858 profile_arc_flag = value;
1859 if (!flag_profile_values_set)
1860 flag_profile_values = value;
1861 if (!flag_value_profile_transformations_set)
1862 flag_value_profile_transformations = value;
1863 if (!flag_inline_functions_set)
1864 flag_inline_functions = value;
1867 case OPT_fprofile_values:
1868 flag_profile_values_set = true;
1871 case OPT_fshow_column:
1872 global_dc->show_column = value;
1875 case OPT_fvisibility_:
1877 if (!strcmp(arg, "default"))
1878 default_visibility = VISIBILITY_DEFAULT;
1879 else if (!strcmp(arg, "internal"))
1880 default_visibility = VISIBILITY_INTERNAL;
1881 else if (!strcmp(arg, "hidden"))
1882 default_visibility = VISIBILITY_HIDDEN;
1883 else if (!strcmp(arg, "protected"))
1884 default_visibility = VISIBILITY_PROTECTED;
1886 error ("unrecognized visibility value \"%s\"", arg);
1891 flag_value_profile_transformations_set = true;
1894 case OPT_frandom_seed:
1895 /* The real switch is -fno-random-seed. */
1898 set_random_seed (NULL);
1901 case OPT_frandom_seed_:
1902 set_random_seed (arg);
1905 case OPT_fselective_scheduling:
1906 case OPT_fselective_scheduling2:
1907 sel_sched_switch_set = true;
1910 case OPT_fsched_verbose_:
1911 #ifdef INSN_SCHEDULING
1912 fix_sched_param ("verbose", arg);
1918 case OPT_fsched_stalled_insns_:
1919 flag_sched_stalled_insns = value;
1920 if (flag_sched_stalled_insns == 0)
1921 flag_sched_stalled_insns = -1;
1924 case OPT_fsched_stalled_insns_dep_:
1925 flag_sched_stalled_insns_dep = value;
1928 case OPT_fstack_check_:
1929 if (!strcmp (arg, "no"))
1930 flag_stack_check = NO_STACK_CHECK;
1931 else if (!strcmp (arg, "generic"))
1932 /* This is the old stack checking method. */
1933 flag_stack_check = STACK_CHECK_BUILTIN
1934 ? FULL_BUILTIN_STACK_CHECK
1935 : GENERIC_STACK_CHECK;
1936 else if (!strcmp (arg, "specific"))
1937 /* This is the new stack checking method. */
1938 flag_stack_check = STACK_CHECK_BUILTIN
1939 ? FULL_BUILTIN_STACK_CHECK
1940 : STACK_CHECK_STATIC_BUILTIN
1941 ? STATIC_BUILTIN_STACK_CHECK
1942 : GENERIC_STACK_CHECK;
1944 warning (0, "unknown stack check parameter \"%s\"", arg);
1947 case OPT_fstack_limit:
1948 /* The real switch is -fno-stack-limit. */
1951 stack_limit_rtx = NULL_RTX;
1954 case OPT_fstack_limit_register_:
1956 int reg = decode_reg_name (arg);
1958 error ("unrecognized register name \"%s\"", arg);
1960 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
1964 case OPT_fstack_limit_symbol_:
1965 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
1968 case OPT_ftree_vectorizer_verbose_:
1969 vect_set_verbosity_level (arg);
1972 case OPT_ftls_model_:
1973 if (!strcmp (arg, "global-dynamic"))
1974 flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
1975 else if (!strcmp (arg, "local-dynamic"))
1976 flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
1977 else if (!strcmp (arg, "initial-exec"))
1978 flag_tls_default = TLS_MODEL_INITIAL_EXEC;
1979 else if (!strcmp (arg, "local-exec"))
1980 flag_tls_default = TLS_MODEL_LOCAL_EXEC;
1982 warning (0, "unknown tls-model \"%s\"", arg);
1985 case OPT_fira_algorithm_:
1986 if (!strcmp (arg, "CB"))
1987 flag_ira_algorithm = IRA_ALGORITHM_CB;
1988 else if (!strcmp (arg, "priority"))
1989 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
1991 warning (0, "unknown ira algorithm \"%s\"", arg);
1994 case OPT_fira_region_:
1995 if (!strcmp (arg, "one"))
1996 flag_ira_region = IRA_REGION_ONE;
1997 else if (!strcmp (arg, "all"))
1998 flag_ira_region = IRA_REGION_ALL;
1999 else if (!strcmp (arg, "mixed"))
2000 flag_ira_region = IRA_REGION_MIXED;
2002 warning (0, "unknown ira region \"%s\"", arg);
2005 case OPT_fira_verbose_:
2006 flag_ira_verbose = value;
2010 flag_tracer_set = true;
2014 flag_ipa_cp_set = true;
2017 case OPT_fipa_cp_clone:
2018 flag_ipa_cp_clone_set = true;
2021 case OPT_fpredictive_commoning:
2022 flag_predictive_commoning_set = true;
2025 case OPT_funswitch_loops:
2026 flag_unswitch_loops_set = true;
2029 case OPT_fgcse_after_reload:
2030 flag_gcse_after_reload_set = true;
2033 case OPT_funroll_loops:
2034 flag_unroll_loops_set = true;
2038 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
2042 set_debug_level (SDB_DEBUG, false, arg);
2046 if (value < 2 || value > 4)
2047 error ("dwarf version %d is not supported", value);
2049 dwarf_version = value;
2050 set_debug_level (DWARF2_DEBUG, false, "");
2054 set_debug_level (NO_DEBUG, 2, arg);
2059 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
2063 set_debug_level (VMS_DEBUG, false, arg);
2068 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
2072 asm_file_name = arg;
2075 case OPT_pedantic_errors:
2076 flag_pedantic_errors = pedantic = 1;
2077 global_dc->pedantic_errors = 1;
2089 global_dc->inhibit_warnings = true;
2092 case OPT_fuse_linker_plugin:
2093 /* No-op. Used by the driver and passed to us because it starts with f.*/
2097 /* If the flag was handled in a standard way, assume the lack of
2098 processing here is intentional. */
2099 gcc_assert (cl_options[scode].flag_var);
2106 /* Handle --param NAME=VALUE. */
2108 handle_param (const char *carg)
2113 arg = xstrdup (carg);
2114 equal = strchr (arg, '=');
2116 error ("%s: --param arguments should be of the form NAME=VALUE", arg);
2119 value = integral_argument (equal + 1);
2121 error ("invalid --param value %qs", equal + 1);
2125 set_param_value (arg, value);
2132 /* Used to set the level of strict aliasing warnings,
2133 when no level is specified (i.e., when -Wstrict-aliasing, and not
2134 -Wstrict-aliasing=level was given).
2135 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2136 and 0 otherwise. After calling this function, wstrict_aliasing will be
2137 set to the default value of -Wstrict_aliasing=level, currently 3. */
2139 set_Wstrict_aliasing (int onoff)
2141 gcc_assert (onoff == 0 || onoff == 1);
2143 warn_strict_aliasing = 3;
2145 warn_strict_aliasing = 0;
2148 /* The following routines are useful in setting all the flags that
2149 -ffast-math and -fno-fast-math imply. */
2151 set_fast_math_flags (int set)
2153 flag_unsafe_math_optimizations = set;
2154 set_unsafe_math_optimizations_flags (set);
2155 flag_finite_math_only = set;
2156 flag_errno_math = !set;
2159 flag_signaling_nans = 0;
2160 flag_rounding_math = 0;
2161 flag_cx_limited_range = 1;
2165 /* When -funsafe-math-optimizations is set the following
2166 flags are set as well. */
2168 set_unsafe_math_optimizations_flags (int set)
2170 flag_trapping_math = !set;
2171 flag_signed_zeros = !set;
2172 flag_associative_math = set;
2173 flag_reciprocal_math = set;
2176 /* Return true iff flags are set as if -ffast-math. */
2178 fast_math_flags_set_p (void)
2180 return (!flag_trapping_math
2181 && flag_unsafe_math_optimizations
2182 && flag_finite_math_only
2183 && !flag_signed_zeros
2184 && !flag_errno_math);
2187 /* Return true iff flags are set as if -ffast-math but using the flags stored
2188 in the struct cl_optimization structure. */
2190 fast_math_flags_struct_set_p (struct cl_optimization *opt)
2192 return (!opt->flag_trapping_math
2193 && opt->flag_unsafe_math_optimizations
2194 && opt->flag_finite_math_only
2195 && !opt->flag_signed_zeros
2196 && !opt->flag_errno_math);
2199 /* Handle a debug output -g switch. EXTENDED is true or false to support
2200 extended output (2 is special and means "-ggdb" was given). */
2202 set_debug_level (enum debug_info_type type, int extended, const char *arg)
2204 static bool type_explicit;
2206 use_gnu_debug_info_extensions = extended;
2208 if (type == NO_DEBUG)
2210 if (write_symbols == NO_DEBUG)
2212 write_symbols = PREFERRED_DEBUGGING_TYPE;
2216 #ifdef DWARF2_DEBUGGING_INFO
2217 write_symbols = DWARF2_DEBUG;
2218 #elif defined DBX_DEBUGGING_INFO
2219 write_symbols = DBX_DEBUG;
2223 if (write_symbols == NO_DEBUG)
2224 warning (0, "target system does not support debug output");
2229 /* Does it conflict with an already selected type? */
2230 if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
2231 error ("debug format \"%s\" conflicts with prior selection",
2232 debug_type_names[type]);
2233 write_symbols = type;
2234 type_explicit = true;
2237 /* A debug flag without a level defaults to level 2. */
2240 if (!debug_info_level)
2241 debug_info_level = DINFO_LEVEL_NORMAL;
2245 int argval = integral_argument (arg);
2247 error ("unrecognised debug output level \"%s\"", arg);
2248 else if (argval > 3)
2249 error ("debug output level %s is too high", arg);
2251 debug_info_level = (enum debug_info_level) argval;
2255 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2256 a simple on-off switch. */
2259 option_enabled (int opt_idx)
2261 const struct cl_option *option = &(cl_options[opt_idx]);
2263 if (option->flag_var)
2264 switch (option->var_type)
2267 return *(int *) option->flag_var != 0;
2270 return *(int *) option->flag_var == option->var_value;
2272 case CLVC_BIT_CLEAR:
2273 return (*(int *) option->flag_var & option->var_value) == 0;
2276 return (*(int *) option->flag_var & option->var_value) != 0;
2284 /* Fill STATE with the current state of option OPTION. Return true if
2285 there is some state to store. */
2288 get_option_state (int option, struct cl_option_state *state)
2290 if (cl_options[option].flag_var == 0)
2293 switch (cl_options[option].var_type)
2297 state->data = cl_options[option].flag_var;
2298 state->size = sizeof (int);
2301 case CLVC_BIT_CLEAR:
2303 state->ch = option_enabled (option);
2304 state->data = &state->ch;
2309 state->data = *(const char **) cl_options[option].flag_var;
2310 if (state->data == 0)
2312 state->size = strlen ((const char *) state->data) + 1;
2318 /* Callback function, called when -Werror= enables a warning. */
2320 static void (*warning_as_error_callback) (int) = NULL;
2322 /* Register a callback for enable_warning_as_error calls. */
2325 register_warning_as_error_callback (void (*callback) (int))
2327 gcc_assert (warning_as_error_callback == NULL || callback == NULL);
2328 warning_as_error_callback = callback;
2331 /* Enable a warning option as an error. This is used by -Werror= and
2332 also by legacy Werror-implicit-function-declaration. */
2335 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
2336 const struct cl_option_handlers *handlers)
2341 new_option = XNEWVEC (char, strlen (arg) + 2);
2342 new_option[0] = 'W';
2343 strcpy (new_option + 1, arg);
2344 option_index = find_opt (new_option, lang_mask);
2345 if (option_index == OPT_SPECIAL_unknown)
2347 error ("-Werror=%s: No option -%s", arg, new_option);
2351 const struct cl_option *option = &cl_options[option_index];
2352 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2354 if (option->alias_target != N_OPTS)
2355 option_index = option->alias_target;
2356 if (option_index == OPT_SPECIAL_ignore)
2358 diagnostic_classify_diagnostic (global_dc, option_index, kind,
2360 if (kind == DK_ERROR)
2362 const struct cl_option * const option = cl_options + option_index;
2364 /* -Werror=foo implies -Wfoo. */
2365 if (option->var_type == CLVC_BOOLEAN)
2366 handle_generated_option (option_index, NULL, value, lang_mask,
2367 (int)kind, handlers);
2369 if (warning_as_error_callback)
2370 warning_as_error_callback (option_index);
2376 /* Return malloced memory for the name of the option OPTION_INDEX
2377 which enabled a diagnostic (context CONTEXT), originally of type
2378 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2382 option_name (diagnostic_context *context, int option_index,
2383 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
2387 /* A warning classified as an error. */
2388 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
2389 && diag_kind == DK_ERROR)
2390 return concat (cl_options[OPT_Werror_].opt_text,
2391 /* Skip over "-W". */
2392 cl_options[option_index].opt_text + 2,
2394 /* A warning with option. */
2396 return xstrdup (cl_options[option_index].opt_text);
2398 /* A warning without option classified as an error. */
2399 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2400 || diag_kind == DK_WARNING)
2402 if (context->warning_as_error_requested)
2403 return xstrdup (cl_options[OPT_Werror].opt_text);
2405 return xstrdup (_("enabled by default"));