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");
1091 #define LEFT_COLUMN 27
1093 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1094 followed by word-wrapped HELP in a second column. */
1096 wrap_help (const char *help,
1098 unsigned int item_width,
1099 unsigned int columns)
1101 unsigned int col_width = LEFT_COLUMN;
1102 unsigned int remaining, room, len;
1104 remaining = strlen (help);
1108 room = columns - 3 - MAX (col_width, item_width);
1117 for (i = 0; help[i]; i++)
1119 if (i >= room && len != remaining)
1123 else if ((help[i] == '-' || help[i] == '/')
1124 && help[i + 1] != ' '
1125 && i > 0 && ISALPHA (help[i - 1]))
1130 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
1132 while (help[len] == ' ')
1140 /* Print help for a specific front-end, etc. */
1142 print_filtered_help (unsigned int include_flags,
1143 unsigned int exclude_flags,
1144 unsigned int any_flags,
1145 unsigned int columns)
1149 static char *printed = NULL;
1151 bool displayed = false;
1153 if (include_flags == CL_PARAMS)
1155 for (i = 0; i < LAST_PARAM; i++)
1157 const char *param = compiler_params[i].option;
1159 help = compiler_params[i].help;
1160 if (help == NULL || *help == '\0')
1162 if (exclude_flags & CL_UNDOCUMENTED)
1164 help = undocumented_msg;
1167 /* Get the translation. */
1170 wrap_help (help, param, strlen (param), columns);
1177 printed = XCNEWVAR (char, cl_options_count);
1179 for (i = 0; i < cl_options_count; i++)
1181 static char new_help[128];
1182 const struct cl_option *option = cl_options + i;
1187 if (include_flags == 0
1188 || ((option->flags & include_flags) != include_flags))
1190 if ((option->flags & any_flags) == 0)
1194 /* Skip unwanted switches. */
1195 if ((option->flags & exclude_flags) != 0)
1198 /* The driver currently prints its own help text. */
1199 if ((option->flags & CL_DRIVER) != 0
1200 && (option->flags & (((1U << cl_lang_count) - 1)
1201 | CL_COMMON | CL_TARGET)) == 0)
1205 /* Skip switches that have already been printed. */
1211 help = option->help;
1214 if (exclude_flags & CL_UNDOCUMENTED)
1216 help = undocumented_msg;
1219 /* Get the translation. */
1222 /* Find the gap between the name of the
1223 option and its descriptive text. */
1224 tab = strchr (help, '\t');
1233 opt = option->opt_text;
1237 /* With the -Q option enabled we change the descriptive text associated
1238 with an option to be an indication of its current setting. */
1241 if (len < (LEFT_COLUMN + 2))
1242 strcpy (new_help, "\t\t");
1244 strcpy (new_help, "\t");
1246 if (option->flag_var != NULL)
1248 if (option->flags & CL_JOINED)
1250 if (option->var_type == CLVC_STRING)
1252 if (* (const char **) option->flag_var != NULL)
1253 snprintf (new_help + strlen (new_help),
1254 sizeof (new_help) - strlen (new_help),
1255 * (const char **) option->flag_var);
1258 sprintf (new_help + strlen (new_help),
1259 "%#x", * (int *) option->flag_var);
1262 strcat (new_help, option_enabled (i)
1263 ? _("[enabled]") : _("[disabled]"));
1269 wrap_help (help, opt, len, columns);
1275 unsigned int langs = include_flags & CL_LANG_ALL;
1278 printf (_(" No options with the desired characteristics were found\n"));
1283 /* PR 31349: Tell the user how to see all of the
1284 options supported by a specific front end. */
1285 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1286 if ((1U << i) & langs)
1287 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1288 lang_names[i], lang_names[i]);
1292 else if (! displayed)
1293 printf (_(" All options with the desired characteristics have already been displayed\n"));
1298 /* Display help for a specified type of option.
1299 The options must have ALL of the INCLUDE_FLAGS set
1300 ANY of the flags in the ANY_FLAGS set
1301 and NONE of the EXCLUDE_FLAGS set. */
1303 print_specific_help (unsigned int include_flags,
1304 unsigned int exclude_flags,
1305 unsigned int any_flags)
1307 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1308 const char * description = NULL;
1309 const char * descrip_extra = "";
1312 static unsigned int columns = 0;
1314 /* Sanity check: Make sure that we do not have more
1315 languages than we have bits available to enumerate them. */
1316 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1318 /* If we have not done so already, obtain
1319 the desired maximum width of the output. */
1324 GET_ENVIRONMENT (p, "COLUMNS");
1327 int value = atoi (p);
1334 /* Use a reasonable default. */
1338 /* Decide upon the title for the options that we are going to display. */
1339 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1341 switch (flag & include_flags)
1348 description = _("The following options are target specific");
1351 description = _("The following options control compiler warning messages");
1353 case CL_OPTIMIZATION:
1354 description = _("The following options control optimizations");
1357 description = _("The following options are language-independent");
1360 description = _("The --param option recognizes the following as parameters");
1363 if (i >= cl_lang_count)
1365 if (exclude_flags & all_langs_mask)
1366 description = _("The following options are specific to just the language ");
1368 description = _("The following options are supported by the language ");
1369 descrip_extra = lang_names [i];
1374 if (description == NULL)
1378 if (include_flags & CL_UNDOCUMENTED)
1379 description = _("The following options are not documented");
1380 else if (include_flags & CL_SEPARATE)
1381 description = _("The following options take separate arguments");
1382 else if (include_flags & CL_JOINED)
1383 description = _("The following options take joined arguments");
1386 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1393 if (any_flags & all_langs_mask)
1394 description = _("The following options are language-related");
1396 description = _("The following options are language-independent");
1400 printf ("%s%s:\n", description, descrip_extra);
1401 print_filtered_help (include_flags, exclude_flags, any_flags, columns);
1404 /* Handle target- and language-independent options. Return zero to
1405 generate an "unknown option" message. Only options that need
1406 extra handling need to be listed here; if you simply want
1407 DECODED->value assigned to a variable, it happens automatically. */
1410 common_handle_option (const struct cl_decoded_option *decoded,
1411 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1412 const struct cl_option_handlers *handlers)
1414 size_t scode = decoded->opt_index;
1415 const char *arg = decoded->arg;
1416 int value = decoded->value;
1417 static bool verbose = false;
1418 enum opt_code code = (enum opt_code) scode;
1420 gcc_assert (decoded->canonical_option_num_elements <= 2);
1435 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1436 unsigned int undoc_mask;
1439 undoc_mask = (verbose | extra_warnings) ? 0 : CL_UNDOCUMENTED;
1440 /* First display any single language specific options. */
1441 for (i = 0; i < cl_lang_count; i++)
1443 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
1444 /* Next display any multi language specific options. */
1445 print_specific_help (0, undoc_mask, all_langs_mask);
1446 /* Then display any remaining, non-language options. */
1447 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1449 print_specific_help (i, undoc_mask, 0);
1450 exit_after_options = true;
1454 case OPT_ftarget_help:
1455 case OPT__target_help:
1456 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
1457 exit_after_options = true;
1459 /* Allow the target a chance to give the user some additional information. */
1467 const char * a = arg;
1468 unsigned int include_flags = 0;
1469 /* Note - by default we include undocumented options when listing
1470 specific classes. If you only want to see documented options
1471 then add ",^undocumented" to the --help= option. E.g.:
1473 --help=target,^undocumented */
1474 unsigned int exclude_flags = 0;
1476 /* Walk along the argument string, parsing each word in turn.
1478 arg = [^]{word}[,{arg}]
1479 word = {optimizers|target|warnings|undocumented|
1480 params|common|<language>} */
1485 const char * string;
1490 { "optimizers", CL_OPTIMIZATION },
1491 { "target", CL_TARGET },
1492 { "warnings", CL_WARNING },
1493 { "undocumented", CL_UNDOCUMENTED },
1494 { "params", CL_PARAMS },
1495 { "joined", CL_JOINED },
1496 { "separate", CL_SEPARATE },
1497 { "common", CL_COMMON },
1500 unsigned int * pflags;
1502 unsigned int lang_flag, specific_flag;
1509 pflags = & exclude_flags;
1512 pflags = & include_flags;
1514 comma = strchr (a, ',');
1525 /* Check to see if the string matches an option class name. */
1526 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1527 if (strncasecmp (a, specifics[i].string, len) == 0)
1529 specific_flag = specifics[i].flag;
1533 /* Check to see if the string matches a language name.
1534 Note - we rely upon the alpha-sorted nature of the entries in
1535 the lang_names array, specifically that shorter names appear
1536 before their longer variants. (i.e. C before C++). That way
1537 when we are attempting to match --help=c for example we will
1538 match with C first and not C++. */
1539 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1540 if (strncasecmp (a, lang_names[i], len) == 0)
1542 lang_flag = 1U << i;
1546 if (specific_flag != 0)
1549 * pflags |= specific_flag;
1552 /* The option's argument matches both the start of a
1553 language name and the start of an option class name.
1554 We have a special case for when the user has
1555 specified "--help=c", but otherwise we have to issue
1557 if (strncasecmp (a, "c", len) == 0)
1558 * pflags |= lang_flag;
1561 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1565 else if (lang_flag != 0)
1566 * pflags |= lang_flag;
1569 "warning: unrecognized argument to --help= option: %.*s\n",
1578 print_specific_help (include_flags, exclude_flags, 0);
1579 exit_after_options = true;
1585 exit_after_options = true;
1591 /* Currently handled in a prescan. */
1595 enable_warning_as_error (arg, value, lang_mask, handlers);
1598 case OPT_Wlarger_than_:
1599 larger_than_size = value;
1600 warn_larger_than = value != -1;
1603 case OPT_Wfatal_errors:
1604 global_dc->fatal_errors = value;
1607 case OPT_Wframe_larger_than_:
1608 frame_larger_than_size = value;
1609 warn_frame_larger_than = value != -1;
1612 case OPT_Wstrict_aliasing:
1613 set_Wstrict_aliasing (value);
1616 case OPT_Wstrict_aliasing_:
1617 warn_strict_aliasing = value;
1620 case OPT_Wstrict_overflow:
1621 warn_strict_overflow = (value
1622 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1626 case OPT_Wstrict_overflow_:
1627 warn_strict_overflow = value;
1630 case OPT_Wsystem_headers:
1631 global_dc->warn_system_headers = value;
1635 warn_unused = value;
1639 aux_info_file_name = arg;
1640 flag_gen_aux_info = 1;
1644 aux_base_name = arg;
1647 case OPT_auxbase_strip:
1649 char *tmp = xstrdup (arg);
1650 strip_off_ending (tmp, strlen (tmp));
1652 aux_base_name = tmp;
1657 decode_d_option (arg);
1661 dump_base_name = arg;
1665 dump_dir_name = arg;
1668 case OPT_falign_functions_:
1669 align_functions = value;
1672 case OPT_falign_jumps_:
1673 align_jumps = value;
1676 case OPT_falign_labels_:
1677 align_labels = value;
1680 case OPT_falign_loops_:
1681 align_loops = value;
1684 case OPT_fbranch_probabilities:
1685 flag_branch_probabilities_set = true;
1688 case OPT_fcall_used_:
1689 fix_register (arg, 0, 1);
1692 case OPT_fcall_saved_:
1693 fix_register (arg, 0, 0);
1697 dbg_cnt_process_opt (arg);
1700 case OPT_fdbg_cnt_list:
1701 dbg_cnt_list_all_counters ();
1704 case OPT_fdebug_prefix_map_:
1705 add_debug_prefix_map (arg);
1708 case OPT_fdiagnostics_show_location_:
1709 if (!strcmp (arg, "once"))
1710 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1711 else if (!strcmp (arg, "every-line"))
1712 diagnostic_prefixing_rule (global_dc)
1713 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1718 case OPT_fdiagnostics_show_option:
1719 global_dc->show_option_requested = value;
1723 if (!dump_switch_p (arg))
1727 case OPT_fexcess_precision_:
1728 if (!strcmp (arg, "fast"))
1729 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
1730 else if (!strcmp (arg, "standard"))
1731 flag_excess_precision_cmdline = EXCESS_PRECISION_STANDARD;
1733 error ("unknown excess precision style \"%s\"", arg);
1736 case OPT_ffast_math:
1737 set_fast_math_flags (value);
1740 case OPT_funsafe_math_optimizations:
1741 set_unsafe_math_optimizations_flags (value);
1745 fix_register (arg, 1, 1);
1748 case OPT_finline_limit_:
1749 set_param_value ("max-inline-insns-single", value / 2);
1750 set_param_value ("max-inline-insns-auto", value / 2);
1753 case OPT_finstrument_functions_exclude_function_list_:
1754 add_comma_separated_to_vector
1755 (&flag_instrument_functions_exclude_functions, arg);
1758 case OPT_finstrument_functions_exclude_file_list_:
1759 add_comma_separated_to_vector
1760 (&flag_instrument_functions_exclude_files, arg);
1763 case OPT_fmessage_length_:
1764 pp_set_line_maximum_length (global_dc->printer, value);
1767 case OPT_fpack_struct_:
1768 if (value <= 0 || (value & (value - 1)) || value > 16)
1769 error ("structure alignment must be a small power of two, not %d", value);
1772 initial_max_fld_align = value;
1773 maximum_field_alignment = value * BITS_PER_UNIT;
1777 case OPT_fpeel_loops:
1778 flag_peel_loops_set = true;
1782 #ifdef ENABLE_PLUGIN
1783 add_new_plugin (arg);
1785 error ("Plugin support is disabled. Configure with --enable-plugin.");
1789 case OPT_fplugin_arg_:
1790 #ifdef ENABLE_PLUGIN
1791 parse_plugin_arg_opt (arg);
1793 error ("Plugin support is disabled. Configure with --enable-plugin.");
1797 case OPT_fprofile_arcs:
1798 profile_arc_flag_set = true;
1801 case OPT_finline_functions:
1802 flag_inline_functions_set = true;
1805 case OPT_fprofile_dir_:
1806 profile_data_prefix = xstrdup (arg);
1809 case OPT_fprofile_use_:
1810 profile_data_prefix = xstrdup (arg);
1811 flag_profile_use = true;
1813 /* No break here - do -fprofile-use processing. */
1814 case OPT_fprofile_use:
1815 if (!flag_branch_probabilities_set)
1816 flag_branch_probabilities = value;
1817 if (!flag_profile_values_set)
1818 flag_profile_values = value;
1819 if (!flag_unroll_loops_set)
1820 flag_unroll_loops = value;
1821 if (!flag_peel_loops_set)
1822 flag_peel_loops = value;
1823 if (!flag_tracer_set)
1824 flag_tracer = value;
1825 if (!flag_value_profile_transformations_set)
1826 flag_value_profile_transformations = value;
1827 if (!flag_inline_functions_set)
1828 flag_inline_functions = value;
1829 if (!flag_ipa_cp_set)
1830 flag_ipa_cp = value;
1831 if (!flag_ipa_cp_clone_set
1832 && value && flag_ipa_cp)
1833 flag_ipa_cp_clone = value;
1834 if (!flag_predictive_commoning_set)
1835 flag_predictive_commoning = value;
1836 if (!flag_unswitch_loops_set)
1837 flag_unswitch_loops = value;
1838 if (!flag_gcse_after_reload_set)
1839 flag_gcse_after_reload = value;
1842 case OPT_fprofile_generate_:
1843 profile_data_prefix = xstrdup (arg);
1845 /* No break here - do -fprofile-generate processing. */
1846 case OPT_fprofile_generate:
1847 if (!profile_arc_flag_set)
1848 profile_arc_flag = value;
1849 if (!flag_profile_values_set)
1850 flag_profile_values = value;
1851 if (!flag_value_profile_transformations_set)
1852 flag_value_profile_transformations = value;
1853 if (!flag_inline_functions_set)
1854 flag_inline_functions = value;
1857 case OPT_fprofile_values:
1858 flag_profile_values_set = true;
1861 case OPT_fshow_column:
1862 global_dc->show_column = value;
1865 case OPT_fvisibility_:
1867 if (!strcmp(arg, "default"))
1868 default_visibility = VISIBILITY_DEFAULT;
1869 else if (!strcmp(arg, "internal"))
1870 default_visibility = VISIBILITY_INTERNAL;
1871 else if (!strcmp(arg, "hidden"))
1872 default_visibility = VISIBILITY_HIDDEN;
1873 else if (!strcmp(arg, "protected"))
1874 default_visibility = VISIBILITY_PROTECTED;
1876 error ("unrecognized visibility value \"%s\"", arg);
1881 flag_value_profile_transformations_set = true;
1884 case OPT_frandom_seed:
1885 /* The real switch is -fno-random-seed. */
1888 set_random_seed (NULL);
1891 case OPT_frandom_seed_:
1892 set_random_seed (arg);
1895 case OPT_fselective_scheduling:
1896 case OPT_fselective_scheduling2:
1897 sel_sched_switch_set = true;
1900 case OPT_fsched_verbose_:
1901 #ifdef INSN_SCHEDULING
1902 fix_sched_param ("verbose", arg);
1908 case OPT_fsched_stalled_insns_:
1909 flag_sched_stalled_insns = value;
1910 if (flag_sched_stalled_insns == 0)
1911 flag_sched_stalled_insns = -1;
1914 case OPT_fsched_stalled_insns_dep_:
1915 flag_sched_stalled_insns_dep = value;
1918 case OPT_fstack_check_:
1919 if (!strcmp (arg, "no"))
1920 flag_stack_check = NO_STACK_CHECK;
1921 else if (!strcmp (arg, "generic"))
1922 /* This is the old stack checking method. */
1923 flag_stack_check = STACK_CHECK_BUILTIN
1924 ? FULL_BUILTIN_STACK_CHECK
1925 : GENERIC_STACK_CHECK;
1926 else if (!strcmp (arg, "specific"))
1927 /* This is the new stack checking method. */
1928 flag_stack_check = STACK_CHECK_BUILTIN
1929 ? FULL_BUILTIN_STACK_CHECK
1930 : STACK_CHECK_STATIC_BUILTIN
1931 ? STATIC_BUILTIN_STACK_CHECK
1932 : GENERIC_STACK_CHECK;
1934 warning (0, "unknown stack check parameter \"%s\"", arg);
1937 case OPT_fstack_limit:
1938 /* The real switch is -fno-stack-limit. */
1941 stack_limit_rtx = NULL_RTX;
1944 case OPT_fstack_limit_register_:
1946 int reg = decode_reg_name (arg);
1948 error ("unrecognized register name \"%s\"", arg);
1950 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
1954 case OPT_fstack_limit_symbol_:
1955 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
1958 case OPT_ftree_vectorizer_verbose_:
1959 vect_set_verbosity_level (arg);
1962 case OPT_ftls_model_:
1963 if (!strcmp (arg, "global-dynamic"))
1964 flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
1965 else if (!strcmp (arg, "local-dynamic"))
1966 flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
1967 else if (!strcmp (arg, "initial-exec"))
1968 flag_tls_default = TLS_MODEL_INITIAL_EXEC;
1969 else if (!strcmp (arg, "local-exec"))
1970 flag_tls_default = TLS_MODEL_LOCAL_EXEC;
1972 warning (0, "unknown tls-model \"%s\"", arg);
1975 case OPT_fira_algorithm_:
1976 if (!strcmp (arg, "CB"))
1977 flag_ira_algorithm = IRA_ALGORITHM_CB;
1978 else if (!strcmp (arg, "priority"))
1979 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
1981 warning (0, "unknown ira algorithm \"%s\"", arg);
1984 case OPT_fira_region_:
1985 if (!strcmp (arg, "one"))
1986 flag_ira_region = IRA_REGION_ONE;
1987 else if (!strcmp (arg, "all"))
1988 flag_ira_region = IRA_REGION_ALL;
1989 else if (!strcmp (arg, "mixed"))
1990 flag_ira_region = IRA_REGION_MIXED;
1992 warning (0, "unknown ira region \"%s\"", arg);
1995 case OPT_fira_verbose_:
1996 flag_ira_verbose = value;
2000 flag_tracer_set = true;
2004 flag_ipa_cp_set = true;
2007 case OPT_fipa_cp_clone:
2008 flag_ipa_cp_clone_set = true;
2011 case OPT_fpredictive_commoning:
2012 flag_predictive_commoning_set = true;
2015 case OPT_funswitch_loops:
2016 flag_unswitch_loops_set = true;
2019 case OPT_fgcse_after_reload:
2020 flag_gcse_after_reload_set = true;
2023 case OPT_funroll_loops:
2024 flag_unroll_loops_set = true;
2028 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
2032 set_debug_level (SDB_DEBUG, false, arg);
2036 if (value < 2 || value > 4)
2037 error ("dwarf version %d is not supported", value);
2039 dwarf_version = value;
2040 set_debug_level (DWARF2_DEBUG, false, "");
2044 set_debug_level (NO_DEBUG, 2, arg);
2049 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
2053 set_debug_level (VMS_DEBUG, false, arg);
2058 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
2062 asm_file_name = arg;
2065 case OPT_pedantic_errors:
2066 flag_pedantic_errors = pedantic = 1;
2067 global_dc->pedantic_errors = 1;
2079 global_dc->inhibit_warnings = true;
2082 case OPT_fuse_linker_plugin:
2083 /* No-op. Used by the driver and passed to us because it starts with f.*/
2087 /* If the flag was handled in a standard way, assume the lack of
2088 processing here is intentional. */
2089 gcc_assert (cl_options[scode].flag_var);
2096 /* Handle --param NAME=VALUE. */
2098 handle_param (const char *carg)
2103 arg = xstrdup (carg);
2104 equal = strchr (arg, '=');
2106 error ("%s: --param arguments should be of the form NAME=VALUE", arg);
2109 value = integral_argument (equal + 1);
2111 error ("invalid --param value %qs", equal + 1);
2115 set_param_value (arg, value);
2122 /* Used to set the level of strict aliasing warnings,
2123 when no level is specified (i.e., when -Wstrict-aliasing, and not
2124 -Wstrict-aliasing=level was given).
2125 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2126 and 0 otherwise. After calling this function, wstrict_aliasing will be
2127 set to the default value of -Wstrict_aliasing=level, currently 3. */
2129 set_Wstrict_aliasing (int onoff)
2131 gcc_assert (onoff == 0 || onoff == 1);
2133 warn_strict_aliasing = 3;
2135 warn_strict_aliasing = 0;
2138 /* The following routines are useful in setting all the flags that
2139 -ffast-math and -fno-fast-math imply. */
2141 set_fast_math_flags (int set)
2143 flag_unsafe_math_optimizations = set;
2144 set_unsafe_math_optimizations_flags (set);
2145 flag_finite_math_only = set;
2146 flag_errno_math = !set;
2149 flag_signaling_nans = 0;
2150 flag_rounding_math = 0;
2151 flag_cx_limited_range = 1;
2155 /* When -funsafe-math-optimizations is set the following
2156 flags are set as well. */
2158 set_unsafe_math_optimizations_flags (int set)
2160 flag_trapping_math = !set;
2161 flag_signed_zeros = !set;
2162 flag_associative_math = set;
2163 flag_reciprocal_math = set;
2166 /* Return true iff flags are set as if -ffast-math. */
2168 fast_math_flags_set_p (void)
2170 return (!flag_trapping_math
2171 && flag_unsafe_math_optimizations
2172 && flag_finite_math_only
2173 && !flag_signed_zeros
2174 && !flag_errno_math);
2177 /* Return true iff flags are set as if -ffast-math but using the flags stored
2178 in the struct cl_optimization structure. */
2180 fast_math_flags_struct_set_p (struct cl_optimization *opt)
2182 return (!opt->flag_trapping_math
2183 && opt->flag_unsafe_math_optimizations
2184 && opt->flag_finite_math_only
2185 && !opt->flag_signed_zeros
2186 && !opt->flag_errno_math);
2189 /* Handle a debug output -g switch. EXTENDED is true or false to support
2190 extended output (2 is special and means "-ggdb" was given). */
2192 set_debug_level (enum debug_info_type type, int extended, const char *arg)
2194 static bool type_explicit;
2196 use_gnu_debug_info_extensions = extended;
2198 if (type == NO_DEBUG)
2200 if (write_symbols == NO_DEBUG)
2202 write_symbols = PREFERRED_DEBUGGING_TYPE;
2206 #ifdef DWARF2_DEBUGGING_INFO
2207 write_symbols = DWARF2_DEBUG;
2208 #elif defined DBX_DEBUGGING_INFO
2209 write_symbols = DBX_DEBUG;
2213 if (write_symbols == NO_DEBUG)
2214 warning (0, "target system does not support debug output");
2219 /* Does it conflict with an already selected type? */
2220 if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
2221 error ("debug format \"%s\" conflicts with prior selection",
2222 debug_type_names[type]);
2223 write_symbols = type;
2224 type_explicit = true;
2227 /* A debug flag without a level defaults to level 2. */
2230 if (!debug_info_level)
2231 debug_info_level = DINFO_LEVEL_NORMAL;
2235 int argval = integral_argument (arg);
2237 error ("unrecognised debug output level \"%s\"", arg);
2238 else if (argval > 3)
2239 error ("debug output level %s is too high", arg);
2241 debug_info_level = (enum debug_info_level) argval;
2245 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2246 a simple on-off switch. */
2249 option_enabled (int opt_idx)
2251 const struct cl_option *option = &(cl_options[opt_idx]);
2253 if (option->flag_var)
2254 switch (option->var_type)
2257 return *(int *) option->flag_var != 0;
2260 return *(int *) option->flag_var == option->var_value;
2262 case CLVC_BIT_CLEAR:
2263 return (*(int *) option->flag_var & option->var_value) == 0;
2266 return (*(int *) option->flag_var & option->var_value) != 0;
2274 /* Fill STATE with the current state of option OPTION. Return true if
2275 there is some state to store. */
2278 get_option_state (int option, struct cl_option_state *state)
2280 if (cl_options[option].flag_var == 0)
2283 switch (cl_options[option].var_type)
2287 state->data = cl_options[option].flag_var;
2288 state->size = sizeof (int);
2291 case CLVC_BIT_CLEAR:
2293 state->ch = option_enabled (option);
2294 state->data = &state->ch;
2299 state->data = *(const char **) cl_options[option].flag_var;
2300 if (state->data == 0)
2302 state->size = strlen ((const char *) state->data) + 1;
2308 /* Callback function, called when -Werror= enables a warning. */
2310 static void (*warning_as_error_callback) (int) = NULL;
2312 /* Register a callback for enable_warning_as_error calls. */
2315 register_warning_as_error_callback (void (*callback) (int))
2317 gcc_assert (warning_as_error_callback == NULL || callback == NULL);
2318 warning_as_error_callback = callback;
2321 /* Enable a warning option as an error. This is used by -Werror= and
2322 also by legacy Werror-implicit-function-declaration. */
2325 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
2326 const struct cl_option_handlers *handlers)
2331 new_option = XNEWVEC (char, strlen (arg) + 2);
2332 new_option[0] = 'W';
2333 strcpy (new_option + 1, arg);
2334 option_index = find_opt (new_option, lang_mask);
2335 if (option_index == OPT_SPECIAL_unknown)
2337 error ("-Werror=%s: No option -%s", arg, new_option);
2341 const struct cl_option *option = &cl_options[option_index];
2342 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2344 if (option->alias_target != N_OPTS)
2345 option_index = option->alias_target;
2346 if (option_index == OPT_SPECIAL_ignore)
2348 diagnostic_classify_diagnostic (global_dc, option_index, kind,
2350 if (kind == DK_ERROR)
2352 const struct cl_option * const option = cl_options + option_index;
2354 /* -Werror=foo implies -Wfoo. */
2355 if (option->var_type == CLVC_BOOLEAN)
2356 handle_generated_option (option_index, NULL, value, lang_mask,
2357 (int)kind, handlers);
2359 if (warning_as_error_callback)
2360 warning_as_error_callback (option_index);
2366 /* Return malloced memory for the name of the option OPTION_INDEX
2367 which enabled a diagnostic (context CONTEXT), originally of type
2368 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2372 option_name (diagnostic_context *context, int option_index,
2373 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
2377 /* A warning classified as an error. */
2378 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
2379 && diag_kind == DK_ERROR)
2380 return concat (cl_options[OPT_Werror_].opt_text,
2381 /* Skip over "-W". */
2382 cl_options[option_index].opt_text + 2,
2384 /* A warning with option. */
2386 return xstrdup (cl_options[option_index].opt_text);
2388 /* A warning without option classified as an error. */
2389 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2390 || diag_kind == DK_WARNING)
2392 if (context->warning_as_error_requested)
2393 return xstrdup (cl_options[OPT_Werror].opt_text);
2395 return xstrdup (_("enabled by default"));