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 "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
40 #include "insn-attr.h" /* For INSN_SCHEDULING. */
42 #include "tree-pass.h"
47 #include "lto-streamer.h"
49 /* Value of the -G xx switch, and whether it was passed or not. */
50 unsigned HOST_WIDE_INT g_switch_value;
53 /* Same for selective scheduling. */
54 bool sel_sched_switch_set;
56 /* True if we should exit after parsing options. */
57 bool exit_after_options;
59 /* True to warn about any objects definitions whose size is larger
60 than N bytes. Also want about function definitions whose returned
61 values are larger than N bytes, where N is `larger_than_size'. */
62 bool warn_larger_than;
63 HOST_WIDE_INT larger_than_size;
65 /* True to warn about any function whose frame size is larger
67 bool warn_frame_larger_than;
68 HOST_WIDE_INT frame_larger_than_size;
70 /* Type(s) of debugging information we are producing (if any). See
71 flags.h for the definitions of the different possible types of
72 debugging information. */
73 enum debug_info_type write_symbols = NO_DEBUG;
75 /* Level of debugging information we are producing. See flags.h for
76 the definitions of the different possible levels. */
77 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
79 /* A major contribution to object and executable size is debug
80 information size. A major contribution to debug information size
81 is struct descriptions replicated in several object files. The
82 following flags attempt to reduce this information. The basic
83 idea is to not emit struct debugging information in the current
84 compilation unit when that information will be generated by
85 another compilation unit.
87 Debug information for a struct defined in the current source
88 file should be generated in the object file. Likewise the
89 debug information for a struct defined in a header should be
90 generated in the object file of the corresponding source file.
91 Both of these case are handled when the base name of the file of
92 the struct definition matches the base name of the source file
93 of the current compilation unit. This matching emits minimal
94 struct debugging information.
96 The base file name matching rule above will fail to emit debug
97 information for structs defined in system headers. So a second
98 category of files includes system headers in addition to files
101 The remaining types of files are library headers and application
102 headers. We cannot currently distinguish these two types. */
104 enum debug_struct_file
106 DINFO_STRUCT_FILE_NONE, /* Debug no structs. */
107 DINFO_STRUCT_FILE_BASE, /* Debug structs defined in files with the
108 same base name as the compilation unit. */
109 DINFO_STRUCT_FILE_SYS, /* Also debug structs defined in system
111 DINFO_STRUCT_FILE_ANY /* Debug structs defined in all files. */
114 /* Generic structs (e.g. templates not explicitly specialized)
115 may not have a compilation unit associated with them, and so
116 may need to be treated differently from ordinary structs.
118 Structs only handled by reference (indirectly), will also usually
119 not need as much debugging information. */
121 static enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS]
122 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
123 static enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS]
124 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
126 /* Parse the -femit-struct-debug-detailed option value
127 and set the flag variables. */
129 #define MATCH( prefix, string ) \
130 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
131 ? ((string += sizeof prefix - 1), 1) : 0)
134 set_struct_debug_option (const char *spec)
136 /* various labels for comparison */
137 static char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
138 static char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
139 static char none_lbl[] = "none", any_lbl[] = "any";
140 static char base_lbl[] = "base", sys_lbl[] = "sys";
142 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
143 /* Default is to apply to as much as possible. */
144 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
145 int ord = 1, gen = 1;
148 if (MATCH (dfn_lbl, spec))
149 usage = DINFO_USAGE_DFN;
150 else if (MATCH (dir_lbl, spec))
151 usage = DINFO_USAGE_DIR_USE;
152 else if (MATCH (ind_lbl, spec))
153 usage = DINFO_USAGE_IND_USE;
155 /* Generics or not? */
156 if (MATCH (ord_lbl, spec))
158 else if (MATCH (gen_lbl, spec))
161 /* What allowable environment? */
162 if (MATCH (none_lbl, spec))
163 files = DINFO_STRUCT_FILE_NONE;
164 else if (MATCH (any_lbl, spec))
165 files = DINFO_STRUCT_FILE_ANY;
166 else if (MATCH (sys_lbl, spec))
167 files = DINFO_STRUCT_FILE_SYS;
168 else if (MATCH (base_lbl, spec))
169 files = DINFO_STRUCT_FILE_BASE;
171 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
174 /* Effect the specification. */
175 if (usage == DINFO_USAGE_NUM_ENUMS)
179 debug_struct_ordinary[DINFO_USAGE_DFN] = files;
180 debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
181 debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
185 debug_struct_generic[DINFO_USAGE_DFN] = files;
186 debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
187 debug_struct_generic[DINFO_USAGE_IND_USE] = files;
193 debug_struct_ordinary[usage] = files;
195 debug_struct_generic[usage] = files;
199 set_struct_debug_option (spec+1);
202 /* No more -femit-struct-debug-detailed specifications.
205 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
207 if (debug_struct_ordinary[DINFO_USAGE_DIR_USE]
208 < debug_struct_ordinary[DINFO_USAGE_IND_USE]
209 || debug_struct_generic[DINFO_USAGE_DIR_USE]
210 < debug_struct_generic[DINFO_USAGE_IND_USE])
211 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
212 " as much as %<-femit-struct-debug-detailed=ind:...%>");
216 /* Find the base name of a path, stripping off both directories and
217 a single final extension. */
219 base_of_path (const char *path, const char **base_out)
221 const char *base = path;
223 const char *p = path;
227 if (IS_DIR_SEPARATOR(c))
242 /* Match the base name of a file to the base name of a compilation unit. */
244 static const char *main_input_basename;
245 static int main_input_baselength;
248 matches_main_base (const char *path)
250 /* Cache the last query. */
251 static const char *last_path = NULL;
252 static int last_match = 0;
253 if (path != last_path)
256 int length = base_of_path (path, &base);
258 last_match = (length == main_input_baselength
259 && memcmp (base, main_input_basename, length) == 0);
264 #ifdef DEBUG_DEBUG_STRUCT
267 dump_struct_debug (tree type, enum debug_info_usage usage,
268 enum debug_struct_file criterion, int generic,
269 int matches, int result)
271 /* Find the type name. */
272 tree type_decl = TYPE_STUB_DECL (type);
274 const char *name = 0;
275 if (TREE_CODE (t) == TYPE_DECL)
278 name = IDENTIFIER_POINTER (t);
280 fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n",
282 DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr",
283 matches ? "bas" : "hdr",
284 generic ? "gen" : "ord",
285 usage == DINFO_USAGE_DFN ? ";" :
286 usage == DINFO_USAGE_DIR_USE ? "." : "*",
288 (void*) type_decl, name);
291 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
292 dump_struct_debug (type, usage, criterion, generic, matches, result)
296 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
303 should_emit_struct_debug (tree type, enum debug_info_usage usage)
305 enum debug_struct_file criterion;
307 bool generic = lang_hooks.types.generic_p (type);
310 criterion = debug_struct_generic[usage];
312 criterion = debug_struct_ordinary[usage];
314 if (criterion == DINFO_STRUCT_FILE_NONE)
315 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
316 if (criterion == DINFO_STRUCT_FILE_ANY)
317 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
319 type_decl = TYPE_STUB_DECL (type);
321 if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl))
322 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
324 if (matches_main_base (DECL_SOURCE_FILE (type_decl)))
325 return DUMP_GSTRUCT (type, usage, criterion, generic, true, true);
326 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
329 /* Nonzero means use GNU-only extensions in the generated symbolic
330 debugging information. Currently, this only has an effect when
331 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
332 bool use_gnu_debug_info_extensions;
334 /* The default visibility for all symbols (unless overridden) */
335 enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
337 /* Global visibility options. */
338 struct visibility_flags visibility_options;
340 /* What to print when a switch has no documentation. */
341 static const char undocumented_msg[] = N_("This switch lacks documentation");
343 /* Used for bookkeeping on whether user set these flags so
344 -fprofile-use/-fprofile-generate does not use them. */
345 static bool profile_arc_flag_set, flag_profile_values_set;
346 static bool flag_unroll_loops_set, flag_tracer_set;
347 static bool flag_value_profile_transformations_set;
348 static bool flag_peel_loops_set, flag_branch_probabilities_set;
349 static bool flag_inline_functions_set, flag_ipa_cp_set, flag_ipa_cp_clone_set;
350 static bool flag_predictive_commoning_set, flag_unswitch_loops_set, flag_gcse_after_reload_set;
352 /* Functions excluded from profiling. */
354 typedef char *char_p; /* For DEF_VEC_P. */
356 DEF_VEC_ALLOC_P(char_p,heap);
358 static VEC(char_p,heap) *flag_instrument_functions_exclude_functions;
359 static VEC(char_p,heap) *flag_instrument_functions_exclude_files;
361 typedef const char *const_char_p; /* For DEF_VEC_P. */
362 DEF_VEC_P(const_char_p);
363 DEF_VEC_ALLOC_P(const_char_p,heap);
365 static VEC(const_char_p,heap) *ignored_options;
367 /* Language specific warning pass for unused results. */
368 bool flag_warn_unused_result = false;
370 /* Input file names. */
371 const char **in_fnames;
372 unsigned num_in_fnames;
374 static int common_handle_option (size_t scode, const char *arg, int value,
375 unsigned int lang_mask, int kind);
376 static void handle_param (const char *);
377 static char *write_langs (unsigned int lang_mask);
378 static void complain_wrong_lang (const char *, const struct cl_option *,
379 unsigned int lang_mask);
380 static void set_debug_level (enum debug_info_type type, int extended,
383 /* If ARG is a non-negative integer made up solely of digits, return its
384 value, otherwise return -1. */
386 integral_argument (const char *arg)
390 while (*p && ISDIGIT (*p))
399 /* Return a malloced slash-separated list of languages in MASK. */
401 write_langs (unsigned int mask)
403 unsigned int n = 0, len = 0;
404 const char *lang_name;
407 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
408 if (mask & (1U << n))
409 len += strlen (lang_name) + 1;
411 result = XNEWVEC (char, len);
413 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
414 if (mask & (1U << n))
418 strcpy (result + len, lang_name);
419 len += strlen (lang_name);
427 /* Complain that switch OPT_INDEX does not apply to this front end. */
429 complain_wrong_lang (const char *text, const struct cl_option *option,
430 unsigned int lang_mask)
432 char *ok_langs, *bad_lang;
434 /* The LTO front end inherits all the options from the first front
435 end that was used. However, not all the original front end
436 options make sense in LTO.
438 A real solution would be to filter this in collect2, but collect2
439 does not have access to all the option attributes to know what to
440 filter. So, in lto1 we silently accept inherited flags and do
442 if (lang_mask & CL_LTO)
445 ok_langs = write_langs (option->flags);
446 bad_lang = write_langs (lang_mask);
448 /* Eventually this should become a hard error IMO. */
449 warning (0, "command line option \"%s\" is valid for %s but not for %s",
450 text, ok_langs, bad_lang);
456 /* Buffer the unknown option described by the string OPT. Currently,
457 we only complain about unknown -Wno-* options if they may have
458 prevented a diagnostic. Otherwise, we just ignore them.
459 Note that if we do complain, it is only as a warning, not an error;
460 passing the compiler an unrecognised -Wno-* option should never
461 change whether the compilation succeeds or fails. */
463 static void postpone_unknown_option_warning(const char *opt)
465 VEC_safe_push (const_char_p, heap, ignored_options, opt);
468 /* Produce a warning for each option previously buffered. */
470 void print_ignored_options (void)
472 location_t saved_loc = input_location;
476 while (!VEC_empty (const_char_p, ignored_options))
479 opt = VEC_pop (const_char_p, ignored_options);
480 warning (0, "unrecognized command line option \"%s\"", opt);
483 input_location = saved_loc;
487 /* Handle option OPT_INDEX, and argument ARG, for the language
488 indicated by LANG_MASK. VALUE is true, unless no- form of an -f or
489 -W option was given. KIND is the diagnostic_t if this is a
490 diagnostics option, DK_UNSPECIFIED otherwise. Returns false if the
491 switch was invalid. */
493 handle_option (int opt_index, int value, const char *arg,
494 unsigned int lang_mask, int kind)
496 const struct cl_option *option = &cl_options[opt_index];
498 if (option->flag_var)
499 set_option (opt_index, value, arg, kind);
501 if (option->flags & lang_mask)
503 if (lang_hooks.handle_option (opt_index, arg, value, kind) == 0)
507 lto_register_user_option (opt_index, arg, value, lang_mask);
511 if (option->flags & CL_COMMON)
513 if (common_handle_option (opt_index, arg, value, lang_mask, kind) == 0)
517 lto_register_user_option (opt_index, arg, value, CL_COMMON);
521 if (option->flags & CL_TARGET)
523 if (!targetm.handle_option (opt_index, arg, value))
527 lto_register_user_option (opt_index, arg, value, CL_TARGET);
533 /* Handle the switch beginning at ARGV for the language indicated by
534 LANG_MASK. Returns the number of switches consumed. */
536 read_cmdline_option (const char **argv, unsigned int lang_mask)
539 const char *opt, *arg = 0;
542 unsigned int result = 0;
543 const struct cl_option *option;
547 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
548 if (opt_index == cl_options_count
549 && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
550 && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
552 /* Drop the "no-" from negative switches. */
553 size_t len = strlen (opt) - 3;
555 dup = XNEWVEC (char, len + 1);
558 memcpy (dup + 2, opt + 5, len - 2 + 1);
561 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
562 if (opt_index == cl_options_count && opt[1] == 'W')
564 /* We don't generate warnings for unknown -Wno-* options
565 unless we issue diagnostics. */
566 postpone_unknown_option_warning (argv[0]);
572 if (opt_index == cl_options_count)
575 option = &cl_options[opt_index];
577 /* Reject negative form of switches that don't take negatives as
579 if (!value && (option->flags & CL_REJECT_NEGATIVE))
582 /* We've recognized this switch. */
585 /* Check to see if the option is disabled for this configuration. */
586 if (option->flags & CL_DISABLED)
588 error ("command line option %qs"
589 " is not supported by this configuration", opt);
593 /* Sort out any argument the switch takes. */
594 if (option->flags & CL_JOINED)
596 /* Have arg point to the original switch. This is because
597 some code, such as disable_builtin_function, expects its
598 argument to be persistent until the program exits. */
599 arg = argv[0] + cl_options[opt_index].opt_len + 1;
601 arg += strlen ("no-");
603 if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
605 if (option->flags & CL_SEPARATE)
611 /* Missing argument. */
615 else if (option->flags & CL_SEPARATE)
621 /* Now we've swallowed any potential argument, complain if this
622 is a switch for a different front end. */
623 if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
625 complain_wrong_lang (argv[0], option, lang_mask);
628 else if ((option->flags & CL_TARGET)
629 && (option->flags & CL_LANG_ALL)
630 && !(option->flags & lang_mask))
632 /* Complain for target flag language mismatches if any languages
634 complain_wrong_lang (argv[0], option, lang_mask);
638 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
640 if (!lang_hooks.missing_argument (opt, opt_index))
641 error ("missing argument to \"%s\"", opt);
645 /* If the switch takes an integer, convert it. */
646 if (arg && (option->flags & CL_UINTEGER))
648 value = integral_argument (arg);
651 error ("argument to \"%s\" should be a non-negative integer",
657 if (!handle_option (opt_index, value, arg, lang_mask, DK_UNSPECIFIED))
666 /* Handle FILENAME from the command line. */
668 add_input_filename (const char *filename)
671 in_fnames = XRESIZEVEC (const char *, in_fnames, num_in_fnames);
672 in_fnames[num_in_fnames - 1] = filename;
675 /* Add comma-separated strings to a char_p vector. */
678 add_comma_separated_to_vector (VEC(char_p,heap) **pvec, const char* arg)
685 /* We never free this string. */
698 VEC_safe_push (char_p, heap, *pvec, token_start);
701 if (*r == '\\' && r[1] == ',')
709 if (*token_start != '\0')
710 VEC_safe_push (char_p, heap, *pvec, token_start);
713 /* Return whether we should exclude FNDECL from instrumentation. */
716 flag_instrument_functions_exclude_p (tree fndecl)
718 if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0)
724 name = lang_hooks.decl_printable_name (fndecl, 0);
726 VEC_iterate (char_p, flag_instrument_functions_exclude_functions,
730 if (strstr (name, s) != NULL)
735 if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0)
741 name = DECL_SOURCE_FILE (fndecl);
743 VEC_iterate (char_p, flag_instrument_functions_exclude_files, i, s);
746 if (strstr (name, s) != NULL)
755 /* Decode and handle the vector of command line options. LANG_MASK
756 contains has a single bit set representing the current
759 read_cmdline_options (unsigned int argc, const char **argv, unsigned int lang_mask)
763 for (i = 1; i < argc; i += n)
765 const char *opt = argv[i];
767 /* Interpret "-" or a non-switch as a file name. */
768 if (opt[0] != '-' || opt[1] == '\0')
770 if (main_input_filename == NULL)
772 main_input_filename = opt;
773 main_input_baselength
774 = base_of_path (main_input_filename, &main_input_basename);
776 add_input_filename (opt);
781 n = read_cmdline_option (argv + i, lang_mask);
786 error ("unrecognized command line option \"%s\"", opt);
791 /* Parse command line options and set default flag values. Do minimal
792 options processing. */
794 decode_options (unsigned int argc, const char **argv)
796 static bool first_time_p = true;
797 static int initial_min_crossjump_insns;
798 static int initial_max_fields_for_field_sensitive;
799 static int initial_loop_invariant_max_bbs_in_loop;
800 static unsigned int initial_lang_mask;
802 unsigned int i, lang_mask;
811 /* Perform language-specific options initialization. */
812 initial_lang_mask = lang_mask = lang_hooks.init_options (argc, argv);
814 lang_hooks.initialize_diagnostics (global_dc);
816 /* Save initial values of parameters we reset. */
817 initial_min_crossjump_insns
818 = compiler_params[PARAM_MIN_CROSSJUMP_INSNS].value;
819 initial_max_fields_for_field_sensitive
820 = compiler_params[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE].value;
821 initial_loop_invariant_max_bbs_in_loop
822 = compiler_params[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP].value;
825 lang_mask = initial_lang_mask;
827 /* Scan to see what optimization level has been specified. That will
828 determine the default value of many flags. */
829 for (i = 1; i < argc; i++)
831 if (!strcmp (argv[i], "-O"))
837 else if (argv[i][0] == '-' && argv[i][1] == 'O')
839 /* Handle -Os, -O2, -O3, -O69, ... */
840 const char *p = &argv[i][2];
842 if ((p[0] == 's') && (p[1] == 0))
846 /* Optimizing for size forces optimize to be 2. */
850 else if (strcmp (p, "fast") == 0)
852 /* -Ofast only adds flags to -O3. */
859 const int optimize_val = read_integral_parameter (p, p - 2, -1);
860 if (optimize_val != -1)
862 optimize = optimize_val;
863 if ((unsigned int) optimize > 255)
872 /* Use priority coloring if cover classes is not defined for the
874 if (targetm.ira_cover_classes == NULL)
875 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
877 /* -O1 optimizations. */
878 opt1 = (optimize >= 1);
879 flag_defer_pop = opt1;
881 flag_delayed_branch = opt1;
883 #ifdef CAN_DEBUG_WITHOUT_FP
884 flag_omit_frame_pointer = opt1;
886 flag_guess_branch_prob = opt1;
887 flag_cprop_registers = opt1;
888 flag_forward_propagate = opt1;
889 flag_if_conversion = opt1;
890 flag_if_conversion2 = opt1;
891 flag_ipa_pure_const = opt1;
892 flag_ipa_reference = opt1;
893 flag_ipa_profile = opt1;
894 flag_merge_constants = opt1;
895 flag_split_wide_types = opt1;
896 flag_tree_ccp = opt1;
897 flag_tree_dce = opt1;
898 flag_tree_dom = opt1;
899 flag_tree_dse = opt1;
900 flag_tree_ter = opt1;
901 flag_tree_sra = opt1;
902 flag_tree_copyrename = opt1;
903 flag_tree_fre = opt1;
904 flag_tree_copy_prop = opt1;
905 flag_tree_sink = opt1;
908 /* -O2 optimizations. */
909 opt2 = (optimize >= 2);
910 flag_inline_small_functions = opt2;
911 flag_indirect_inlining = opt2;
912 flag_thread_jumps = opt2;
913 flag_crossjumping = opt2;
914 flag_optimize_sibling_calls = opt2;
915 flag_cse_follow_jumps = opt2;
917 flag_expensive_optimizations = opt2;
918 flag_rerun_cse_after_loop = opt2;
919 flag_caller_saves = opt2;
920 flag_peephole2 = opt2;
921 #ifdef INSN_SCHEDULING
922 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
923 flag_schedule_insns = opt2 && ! optimize_size;
924 flag_schedule_insns_after_reload = opt2;
927 flag_strict_aliasing = opt2;
928 flag_strict_overflow = opt2;
929 flag_reorder_blocks = opt2;
930 flag_reorder_functions = opt2;
931 flag_tree_vrp = opt2;
932 flag_tree_builtin_call_dce = opt2;
933 flag_tree_pre = opt2;
934 flag_tree_switch_conversion = opt2;
938 /* Track fields in field-sensitive alias analysis. */
939 set_param_value ("max-fields-for-field-sensitive",
940 (opt2) ? 100 : initial_max_fields_for_field_sensitive);
942 /* For -O1 only do loop invariant motion for very small loops. */
943 set_param_value ("loop-invariant-max-bbs-in-loop",
944 (opt2) ? initial_loop_invariant_max_bbs_in_loop : 1000);
946 /* -O3 optimizations. */
947 opt3 = (optimize >= 3);
948 flag_predictive_commoning = opt3;
949 flag_inline_functions = opt3;
950 flag_unswitch_loops = opt3;
951 flag_gcse_after_reload = opt3;
952 flag_tree_vectorize = opt3;
953 flag_ipa_cp_clone = opt3;
954 if (flag_ipa_cp_clone)
957 /* Just -O1/-O0 optimizations. */
958 opt1_max = (optimize <= 1);
959 align_loops = opt1_max;
960 align_jumps = opt1_max;
961 align_labels = opt1_max;
962 align_functions = opt1_max;
966 /* Inlining of functions reducing size is a good idea regardless of them
967 being declared inline. */
968 flag_inline_functions = 1;
970 /* Basic optimization options. */
975 /* We want to crossjump as much as possible. */
976 set_param_value ("min-crossjump-insns", 1);
979 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns);
981 /* -Ofast adds optimizations to -O3. */
984 /* Which is -ffast-math for now. */
985 set_fast_math_flags (1);
986 /* Allow targets to enable extra options with -Ofast
987 before general options processing so disabling them
988 again afterwards works. */
989 targetm.handle_ofast ();
992 /* Enable -Werror=coverage-mismatch by default */
993 enable_warning_as_error("coverage-mismatch", 1, lang_mask);
997 /* Initialize whether `char' is signed. */
998 flag_signed_char = DEFAULT_SIGNED_CHAR;
999 /* Set this to a special "uninitialized" value. The actual default is
1000 set after target options have been processed. */
1001 flag_short_enums = 2;
1003 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
1005 target_flags = targetm.default_target_flags;
1007 /* Some targets have ABI-specified unwind tables. */
1008 flag_unwind_tables = targetm.unwind_tables_default;
1012 /* Clear any options currently held for LTO. */
1013 lto_clear_user_options ();
1016 #ifdef OPTIMIZATION_OPTIONS
1017 /* Allow default optimizations to be specified on a per-machine basis. */
1018 OPTIMIZATION_OPTIONS (optimize, optimize_size);
1021 read_cmdline_options (argc, argv, lang_mask);
1023 if (dump_base_name && ! IS_ABSOLUTE_PATH (dump_base_name))
1025 /* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
1026 directory. Then try to make DUMP_BASE_NAME relative to the
1027 AUX_BASE_NAME directory, typically the directory to contain
1030 dump_base_name = concat (dump_dir_name, dump_base_name, NULL);
1031 else if (aux_base_name)
1033 const char *aux_base;
1035 base_of_path (aux_base_name, &aux_base);
1036 if (aux_base_name != aux_base)
1038 int dir_len = aux_base - aux_base_name;
1039 char *new_dump_base_name =
1040 XNEWVEC (char, strlen(dump_base_name) + dir_len + 1);
1042 /* Copy directory component from AUX_BASE_NAME. */
1043 memcpy (new_dump_base_name, aux_base_name, dir_len);
1044 /* Append existing DUMP_BASE_NAME. */
1045 strcpy (new_dump_base_name + dir_len, dump_base_name);
1046 dump_base_name = new_dump_base_name;
1051 /* Handle related options for unit-at-a-time, toplevel-reorder, and
1053 if (!flag_unit_at_a_time)
1055 if (flag_section_anchors == 1)
1056 error ("Section anchors must be disabled when unit-at-a-time "
1058 flag_section_anchors = 0;
1059 if (flag_toplevel_reorder == 1)
1060 error ("Toplevel reorder must be disabled when unit-at-a-time "
1062 flag_toplevel_reorder = 0;
1064 /* Unless the user has asked for section anchors, we disable toplevel
1065 reordering at -O0 to disable transformations that might be surprising
1066 to end users and to get -fno-toplevel-reorder tested. */
1067 if (!optimize && flag_toplevel_reorder == 2 && flag_section_anchors != 1)
1069 flag_toplevel_reorder = 0;
1070 flag_section_anchors = 0;
1072 if (!flag_toplevel_reorder)
1074 if (flag_section_anchors == 1)
1075 error ("section anchors must be disabled when toplevel reorder"
1077 flag_section_anchors = 0;
1083 flag_pic = flag_pie;
1084 if (flag_pic && !flag_pie)
1086 first_time_p = false;
1091 /* Inlining does not work if not optimizing,
1092 so force it not to be done. */
1097 /* The optimization to partition hot and cold basic blocks into separate
1098 sections of the .o and executable files does not work (currently)
1099 with exception handling. This is because there is no support for
1100 generating unwind info. If flag_exceptions is turned on we need to
1101 turn off the partitioning optimization. */
1103 if (flag_exceptions && flag_reorder_blocks_and_partition
1104 && (USING_SJLJ_EXCEPTIONS
1105 #ifdef TARGET_UNWIND_INFO
1110 inform (input_location,
1111 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1112 flag_reorder_blocks_and_partition = 0;
1113 flag_reorder_blocks = 1;
1116 /* If user requested unwind info, then turn off the partitioning
1119 if (flag_unwind_tables && ! targetm.unwind_tables_default
1120 && flag_reorder_blocks_and_partition
1121 && (USING_SJLJ_EXCEPTIONS
1122 #ifdef TARGET_UNWIND_INFO
1127 inform (input_location,
1128 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1129 flag_reorder_blocks_and_partition = 0;
1130 flag_reorder_blocks = 1;
1133 /* If the target requested unwind info, then turn off the partitioning
1134 optimization with a different message. Likewise, if the target does not
1135 support named sections. */
1137 if (flag_reorder_blocks_and_partition
1138 && (!targetm.have_named_sections
1139 || (flag_unwind_tables && targetm.unwind_tables_default
1140 && (USING_SJLJ_EXCEPTIONS
1141 #ifdef TARGET_UNWIND_INFO
1146 inform (input_location,
1147 "-freorder-blocks-and-partition does not work on this architecture");
1148 flag_reorder_blocks_and_partition = 0;
1149 flag_reorder_blocks = 1;
1152 /* Pipelining of outer loops is only possible when general pipelining
1153 capabilities are requested. */
1154 if (!flag_sel_sched_pipelining)
1155 flag_sel_sched_pipelining_outer_loops = 0;
1157 if (!targetm.ira_cover_classes
1158 && flag_ira_algorithm == IRA_ALGORITHM_CB)
1160 inform (input_location,
1161 "-fira-algorithm=CB does not work on this architecture");
1162 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
1165 if (flag_conserve_stack)
1167 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME))
1168 PARAM_VALUE (PARAM_LARGE_STACK_FRAME) = 100;
1169 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH))
1170 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH) = 40;
1172 if (flag_wpa || flag_ltrans)
1174 /* These passes are not WHOPR compatible yet. */
1176 flag_ipa_struct_reorg = 0;
1179 if (flag_lto || flag_whopr)
1182 flag_generate_lto = 1;
1184 /* When generating IL, do not operate in whole-program mode.
1185 Otherwise, symbols will be privatized too early, causing link
1187 flag_whole_program = 0;
1189 error ("LTO support has not been enabled in this configuration");
1193 /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
1194 check option consistency. */
1195 if (flag_lto && flag_whopr)
1196 error ("-flto and -fwhopr are mutually exclusive");
1199 #define LEFT_COLUMN 27
1201 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1202 followed by word-wrapped HELP in a second column. */
1204 wrap_help (const char *help,
1206 unsigned int item_width,
1207 unsigned int columns)
1209 unsigned int col_width = LEFT_COLUMN;
1210 unsigned int remaining, room, len;
1212 remaining = strlen (help);
1216 room = columns - 3 - MAX (col_width, item_width);
1225 for (i = 0; help[i]; i++)
1227 if (i >= room && len != remaining)
1231 else if ((help[i] == '-' || help[i] == '/')
1232 && help[i + 1] != ' '
1233 && i > 0 && ISALPHA (help[i - 1]))
1238 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
1240 while (help[len] == ' ')
1248 /* Print help for a specific front-end, etc. */
1250 print_filtered_help (unsigned int include_flags,
1251 unsigned int exclude_flags,
1252 unsigned int any_flags,
1253 unsigned int columns)
1257 static char *printed = NULL;
1259 bool displayed = false;
1261 if (include_flags == CL_PARAMS)
1263 for (i = 0; i < LAST_PARAM; i++)
1265 const char *param = compiler_params[i].option;
1267 help = compiler_params[i].help;
1268 if (help == NULL || *help == '\0')
1270 if (exclude_flags & CL_UNDOCUMENTED)
1272 help = undocumented_msg;
1275 /* Get the translation. */
1278 wrap_help (help, param, strlen (param), columns);
1285 printed = XCNEWVAR (char, cl_options_count);
1287 for (i = 0; i < cl_options_count; i++)
1289 static char new_help[128];
1290 const struct cl_option *option = cl_options + i;
1295 if (include_flags == 0
1296 || ((option->flags & include_flags) != include_flags))
1298 if ((option->flags & any_flags) == 0)
1302 /* Skip unwanted switches. */
1303 if ((option->flags & exclude_flags) != 0)
1307 /* Skip switches that have already been printed. */
1313 help = option->help;
1316 if (exclude_flags & CL_UNDOCUMENTED)
1318 help = undocumented_msg;
1321 /* Get the translation. */
1324 /* Find the gap between the name of the
1325 option and its descriptive text. */
1326 tab = strchr (help, '\t');
1335 opt = option->opt_text;
1339 /* With the -Q option enabled we change the descriptive text associated
1340 with an option to be an indication of its current setting. */
1343 if (len < (LEFT_COLUMN + 2))
1344 strcpy (new_help, "\t\t");
1346 strcpy (new_help, "\t");
1348 if (option->flag_var != NULL)
1350 if (option->flags & CL_JOINED)
1352 if (option->var_type == CLVC_STRING)
1354 if (* (const char **) option->flag_var != NULL)
1355 snprintf (new_help + strlen (new_help),
1356 sizeof (new_help) - strlen (new_help),
1357 * (const char **) option->flag_var);
1360 sprintf (new_help + strlen (new_help),
1361 "%#x", * (int *) option->flag_var);
1364 strcat (new_help, option_enabled (i)
1365 ? _("[enabled]") : _("[disabled]"));
1371 wrap_help (help, opt, len, columns);
1377 unsigned int langs = include_flags & CL_LANG_ALL;
1380 printf (_(" No options with the desired characteristics were found\n"));
1385 /* PR 31349: Tell the user how to see all of the
1386 options supported by a specific front end. */
1387 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1388 if ((1U << i) & langs)
1389 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1390 lang_names[i], lang_names[i]);
1394 else if (! displayed)
1395 printf (_(" All options with the desired characteristics have already been displayed\n"));
1400 /* Display help for a specified type of option.
1401 The options must have ALL of the INCLUDE_FLAGS set
1402 ANY of the flags in the ANY_FLAGS set
1403 and NONE of the EXCLUDE_FLAGS set. */
1405 print_specific_help (unsigned int include_flags,
1406 unsigned int exclude_flags,
1407 unsigned int any_flags)
1409 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1410 const char * description = NULL;
1411 const char * descrip_extra = "";
1414 static unsigned int columns = 0;
1416 /* Sanity check: Make sure that we do not have more
1417 languages than we have bits available to enumerate them. */
1418 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1420 /* If we have not done so already, obtain
1421 the desired maximum width of the output. */
1426 GET_ENVIRONMENT (p, "COLUMNS");
1429 int value = atoi (p);
1436 /* Use a reasonable default. */
1440 /* Decide upon the title for the options that we are going to display. */
1441 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1443 switch (flag & include_flags)
1449 description = _("The following options are target specific");
1452 description = _("The following options control compiler warning messages");
1454 case CL_OPTIMIZATION:
1455 description = _("The following options control optimizations");
1458 description = _("The following options are language-independent");
1461 description = _("The --param option recognizes the following as parameters");
1464 if (i >= cl_lang_count)
1466 if (exclude_flags & all_langs_mask)
1467 description = _("The following options are specific to just the language ");
1469 description = _("The following options are supported by the language ");
1470 descrip_extra = lang_names [i];
1475 if (description == NULL)
1479 if (include_flags & CL_UNDOCUMENTED)
1480 description = _("The following options are not documented");
1481 else if (include_flags & CL_SEPARATE)
1482 description = _("The following options take separate arguments");
1483 else if (include_flags & CL_JOINED)
1484 description = _("The following options take joined arguments");
1487 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1494 if (any_flags & all_langs_mask)
1495 description = _("The following options are language-related");
1497 description = _("The following options are language-independent");
1501 printf ("%s%s:\n", description, descrip_extra);
1502 print_filtered_help (include_flags, exclude_flags, any_flags, columns);
1505 /* Handle target- and language-independent options. Return zero to
1506 generate an "unknown option" message. Only options that need
1507 extra handling need to be listed here; if you simply want
1508 VALUE assigned to a variable, it happens automatically. */
1511 common_handle_option (size_t scode, const char *arg, int value,
1512 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED)
1514 static bool verbose = false;
1515 enum opt_code code = (enum opt_code) scode;
1530 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1531 unsigned int undoc_mask;
1534 undoc_mask = (verbose | extra_warnings) ? 0 : CL_UNDOCUMENTED;
1535 /* First display any single language specific options. */
1536 for (i = 0; i < cl_lang_count; i++)
1538 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
1539 /* Next display any multi language specific options. */
1540 print_specific_help (0, undoc_mask, all_langs_mask);
1541 /* Then display any remaining, non-language options. */
1542 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1543 print_specific_help (i, undoc_mask, 0);
1544 exit_after_options = true;
1548 case OPT_ftarget_help:
1549 case OPT__target_help:
1550 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
1551 exit_after_options = true;
1553 /* Allow the target a chance to give the user some additional information. */
1554 if (targetm.target_help)
1555 targetm.target_help ();
1561 const char * a = arg;
1562 unsigned int include_flags = 0;
1563 /* Note - by default we include undocumented options when listing
1564 specific classes. If you only want to see documented options
1565 then add ",^undocumented" to the --help= option. E.g.:
1567 --help=target,^undocumented */
1568 unsigned int exclude_flags = 0;
1570 /* Walk along the argument string, parsing each word in turn.
1572 arg = [^]{word}[,{arg}]
1573 word = {optimizers|target|warnings|undocumented|
1574 params|common|<language>} */
1579 const char * string;
1584 { "optimizers", CL_OPTIMIZATION },
1585 { "target", CL_TARGET },
1586 { "warnings", CL_WARNING },
1587 { "undocumented", CL_UNDOCUMENTED },
1588 { "params", CL_PARAMS },
1589 { "joined", CL_JOINED },
1590 { "separate", CL_SEPARATE },
1591 { "common", CL_COMMON },
1594 unsigned int * pflags;
1596 unsigned int lang_flag, specific_flag;
1603 pflags = & exclude_flags;
1606 pflags = & include_flags;
1608 comma = strchr (a, ',');
1619 /* Check to see if the string matches an option class name. */
1620 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1621 if (strncasecmp (a, specifics[i].string, len) == 0)
1623 specific_flag = specifics[i].flag;
1627 /* Check to see if the string matches a language name.
1628 Note - we rely upon the alpha-sorted nature of the entries in
1629 the lang_names array, specifically that shorter names appear
1630 before their longer variants. (i.e. C before C++). That way
1631 when we are attempting to match --help=c for example we will
1632 match with C first and not C++. */
1633 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1634 if (strncasecmp (a, lang_names[i], len) == 0)
1636 lang_flag = 1U << i;
1640 if (specific_flag != 0)
1643 * pflags |= specific_flag;
1646 /* The option's argument matches both the start of a
1647 language name and the start of an option class name.
1648 We have a special case for when the user has
1649 specified "--help=c", but otherwise we have to issue
1651 if (strncasecmp (a, "c", len) == 0)
1652 * pflags |= lang_flag;
1655 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1659 else if (lang_flag != 0)
1660 * pflags |= lang_flag;
1663 "warning: unrecognized argument to --help= option: %.*s\n",
1672 print_specific_help (include_flags, exclude_flags, 0);
1673 exit_after_options = true;
1679 exit_after_options = true;
1683 g_switch_value = value;
1684 g_switch_set = true;
1689 /* Currently handled in a prescan. */
1693 enable_warning_as_error (arg, value, lang_mask);
1696 case OPT_Wlarger_than_:
1697 /* This form corresponds to -Wlarger-than-.
1698 Kept for backward compatibility.
1699 Don't use it as the first argument of warning(). */
1701 case OPT_Wlarger_than_eq:
1702 larger_than_size = value;
1703 warn_larger_than = value != -1;
1706 case OPT_Wframe_larger_than_:
1707 frame_larger_than_size = value;
1708 warn_frame_larger_than = value != -1;
1711 case OPT_Wstrict_aliasing:
1712 set_Wstrict_aliasing (value);
1715 case OPT_Wstrict_aliasing_:
1716 warn_strict_aliasing = value;
1719 case OPT_Wstrict_overflow:
1720 warn_strict_overflow = (value
1721 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1725 case OPT_Wstrict_overflow_:
1726 warn_strict_overflow = value;
1730 warn_unused = value;
1735 aux_info_file_name = arg;
1736 flag_gen_aux_info = 1;
1740 aux_base_name = arg;
1743 case OPT_auxbase_strip:
1745 char *tmp = xstrdup (arg);
1746 strip_off_ending (tmp, strlen (tmp));
1748 aux_base_name = tmp;
1753 decode_d_option (arg);
1757 dump_base_name = arg;
1761 dump_dir_name = arg;
1764 case OPT_falign_functions_:
1765 align_functions = value;
1768 case OPT_falign_jumps_:
1769 align_jumps = value;
1772 case OPT_falign_labels_:
1773 align_labels = value;
1776 case OPT_falign_loops_:
1777 align_loops = value;
1780 case OPT_fbranch_probabilities:
1781 flag_branch_probabilities_set = true;
1784 case OPT_fcall_used_:
1785 fix_register (arg, 0, 1);
1788 case OPT_fcall_saved_:
1789 fix_register (arg, 0, 0);
1793 dbg_cnt_process_opt (arg);
1796 case OPT_fdbg_cnt_list:
1797 dbg_cnt_list_all_counters ();
1800 case OPT_fdebug_prefix_map_:
1801 add_debug_prefix_map (arg);
1804 case OPT_fdiagnostics_show_location_:
1805 if (!strcmp (arg, "once"))
1806 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1807 else if (!strcmp (arg, "every-line"))
1808 diagnostic_prefixing_rule (global_dc)
1809 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1814 case OPT_fdiagnostics_show_option:
1815 global_dc->show_option_requested = value;
1819 if (!dump_switch_p (arg))
1823 case OPT_fexcess_precision_:
1824 if (!strcmp (arg, "fast"))
1825 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
1826 else if (!strcmp (arg, "standard"))
1827 flag_excess_precision_cmdline = EXCESS_PRECISION_STANDARD;
1829 error ("unknown excess precision style \"%s\"", arg);
1832 case OPT_ffast_math:
1833 set_fast_math_flags (value);
1836 case OPT_funsafe_math_optimizations:
1837 set_unsafe_math_optimizations_flags (value);
1841 fix_register (arg, 1, 1);
1844 case OPT_finline_limit_:
1845 case OPT_finline_limit_eq:
1846 set_param_value ("max-inline-insns-single", value / 2);
1847 set_param_value ("max-inline-insns-auto", value / 2);
1850 case OPT_finstrument_functions_exclude_function_list_:
1851 add_comma_separated_to_vector
1852 (&flag_instrument_functions_exclude_functions, arg);
1855 case OPT_finstrument_functions_exclude_file_list_:
1856 add_comma_separated_to_vector
1857 (&flag_instrument_functions_exclude_files, arg);
1860 case OPT_fmessage_length_:
1861 pp_set_line_maximum_length (global_dc->printer, value);
1864 case OPT_fpack_struct_:
1865 if (value <= 0 || (value & (value - 1)) || value > 16)
1866 error ("structure alignment must be a small power of two, not %d", value);
1869 initial_max_fld_align = value;
1870 maximum_field_alignment = value * BITS_PER_UNIT;
1874 case OPT_fpeel_loops:
1875 flag_peel_loops_set = true;
1879 #ifdef ENABLE_PLUGIN
1880 add_new_plugin (arg);
1882 error ("Plugin support is disabled. Configure with --enable-plugin.");
1886 case OPT_fplugin_arg_:
1887 #ifdef ENABLE_PLUGIN
1888 parse_plugin_arg_opt (arg);
1890 error ("Plugin support is disabled. Configure with --enable-plugin.");
1894 case OPT_fprofile_arcs:
1895 profile_arc_flag_set = true;
1898 case OPT_finline_functions:
1899 flag_inline_functions_set = true;
1902 case OPT_fprofile_dir_:
1903 profile_data_prefix = xstrdup (arg);
1906 case OPT_fprofile_use_:
1907 profile_data_prefix = xstrdup (arg);
1908 flag_profile_use = true;
1910 /* No break here - do -fprofile-use processing. */
1911 case OPT_fprofile_use:
1912 if (!flag_branch_probabilities_set)
1913 flag_branch_probabilities = value;
1914 if (!flag_profile_values_set)
1915 flag_profile_values = value;
1916 if (!flag_unroll_loops_set)
1917 flag_unroll_loops = value;
1918 if (!flag_peel_loops_set)
1919 flag_peel_loops = value;
1920 if (!flag_tracer_set)
1921 flag_tracer = value;
1922 if (!flag_value_profile_transformations_set)
1923 flag_value_profile_transformations = value;
1924 if (!flag_inline_functions_set)
1925 flag_inline_functions = value;
1926 if (!flag_ipa_cp_set)
1927 flag_ipa_cp = value;
1928 if (!flag_ipa_cp_clone_set
1929 && value && flag_ipa_cp)
1930 flag_ipa_cp_clone = value;
1931 if (!flag_predictive_commoning_set)
1932 flag_predictive_commoning = value;
1933 if (!flag_unswitch_loops_set)
1934 flag_unswitch_loops = value;
1935 if (!flag_gcse_after_reload_set)
1936 flag_gcse_after_reload = value;
1939 case OPT_fprofile_generate_:
1940 profile_data_prefix = xstrdup (arg);
1942 /* No break here - do -fprofile-generate processing. */
1943 case OPT_fprofile_generate:
1944 if (!profile_arc_flag_set)
1945 profile_arc_flag = value;
1946 if (!flag_profile_values_set)
1947 flag_profile_values = value;
1948 if (!flag_value_profile_transformations_set)
1949 flag_value_profile_transformations = value;
1950 if (!flag_inline_functions_set)
1951 flag_inline_functions = value;
1954 case OPT_fprofile_values:
1955 flag_profile_values_set = true;
1958 case OPT_fvisibility_:
1960 if (!strcmp(arg, "default"))
1961 default_visibility = VISIBILITY_DEFAULT;
1962 else if (!strcmp(arg, "internal"))
1963 default_visibility = VISIBILITY_INTERNAL;
1964 else if (!strcmp(arg, "hidden"))
1965 default_visibility = VISIBILITY_HIDDEN;
1966 else if (!strcmp(arg, "protected"))
1967 default_visibility = VISIBILITY_PROTECTED;
1969 error ("unrecognized visibility value \"%s\"", arg);
1974 flag_value_profile_transformations_set = true;
1977 case OPT_frandom_seed:
1978 /* The real switch is -fno-random-seed. */
1981 set_random_seed (NULL);
1984 case OPT_frandom_seed_:
1985 set_random_seed (arg);
1988 case OPT_fselective_scheduling:
1989 case OPT_fselective_scheduling2:
1990 sel_sched_switch_set = true;
1993 case OPT_fsched_verbose_:
1994 #ifdef INSN_SCHEDULING
1995 fix_sched_param ("verbose", arg);
2001 case OPT_fsched_stalled_insns_:
2002 flag_sched_stalled_insns = value;
2003 if (flag_sched_stalled_insns == 0)
2004 flag_sched_stalled_insns = -1;
2007 case OPT_fsched_stalled_insns_dep_:
2008 flag_sched_stalled_insns_dep = value;
2011 case OPT_fstack_check_:
2012 if (!strcmp (arg, "no"))
2013 flag_stack_check = NO_STACK_CHECK;
2014 else if (!strcmp (arg, "generic"))
2015 /* This is the old stack checking method. */
2016 flag_stack_check = STACK_CHECK_BUILTIN
2017 ? FULL_BUILTIN_STACK_CHECK
2018 : GENERIC_STACK_CHECK;
2019 else if (!strcmp (arg, "specific"))
2020 /* This is the new stack checking method. */
2021 flag_stack_check = STACK_CHECK_BUILTIN
2022 ? FULL_BUILTIN_STACK_CHECK
2023 : STACK_CHECK_STATIC_BUILTIN
2024 ? STATIC_BUILTIN_STACK_CHECK
2025 : GENERIC_STACK_CHECK;
2027 warning (0, "unknown stack check parameter \"%s\"", arg);
2030 case OPT_fstack_check:
2031 /* This is the same as the "specific" mode above. */
2033 flag_stack_check = STACK_CHECK_BUILTIN
2034 ? FULL_BUILTIN_STACK_CHECK
2035 : STACK_CHECK_STATIC_BUILTIN
2036 ? STATIC_BUILTIN_STACK_CHECK
2037 : GENERIC_STACK_CHECK;
2039 flag_stack_check = NO_STACK_CHECK;
2042 case OPT_fstack_limit:
2043 /* The real switch is -fno-stack-limit. */
2046 stack_limit_rtx = NULL_RTX;
2049 case OPT_fstack_limit_register_:
2051 int reg = decode_reg_name (arg);
2053 error ("unrecognized register name \"%s\"", arg);
2055 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
2059 case OPT_fstack_limit_symbol_:
2060 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
2063 case OPT_ftree_vectorizer_verbose_:
2064 vect_set_verbosity_level (arg);
2067 case OPT_ftls_model_:
2068 if (!strcmp (arg, "global-dynamic"))
2069 flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
2070 else if (!strcmp (arg, "local-dynamic"))
2071 flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
2072 else if (!strcmp (arg, "initial-exec"))
2073 flag_tls_default = TLS_MODEL_INITIAL_EXEC;
2074 else if (!strcmp (arg, "local-exec"))
2075 flag_tls_default = TLS_MODEL_LOCAL_EXEC;
2077 warning (0, "unknown tls-model \"%s\"", arg);
2080 case OPT_fira_algorithm_:
2081 if (!strcmp (arg, "CB"))
2082 flag_ira_algorithm = IRA_ALGORITHM_CB;
2083 else if (!strcmp (arg, "priority"))
2084 flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
2086 warning (0, "unknown ira algorithm \"%s\"", arg);
2089 case OPT_fira_region_:
2090 if (!strcmp (arg, "one"))
2091 flag_ira_region = IRA_REGION_ONE;
2092 else if (!strcmp (arg, "all"))
2093 flag_ira_region = IRA_REGION_ALL;
2094 else if (!strcmp (arg, "mixed"))
2095 flag_ira_region = IRA_REGION_MIXED;
2097 warning (0, "unknown ira region \"%s\"", arg);
2100 case OPT_fira_verbose_:
2101 flag_ira_verbose = value;
2105 flag_tracer_set = true;
2109 flag_ipa_cp_set = true;
2112 case OPT_fipa_cp_clone:
2113 flag_ipa_cp_clone_set = true;
2116 case OPT_fpredictive_commoning:
2117 flag_predictive_commoning_set = true;
2120 case OPT_funswitch_loops:
2121 flag_unswitch_loops_set = true;
2124 case OPT_fgcse_after_reload:
2125 flag_gcse_after_reload_set = true;
2128 case OPT_funroll_loops:
2129 flag_unroll_loops_set = true;
2133 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
2137 set_debug_level (SDB_DEBUG, false, arg);
2141 if (value < 2 || value > 4)
2142 error ("dwarf version %d is not supported", value);
2144 dwarf_version = value;
2145 set_debug_level (DWARF2_DEBUG, false, "");
2149 set_debug_level (NO_DEBUG, 2, arg);
2154 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
2158 set_debug_level (VMS_DEBUG, false, arg);
2163 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
2167 asm_file_name = arg;
2170 case OPT_pedantic_errors:
2171 flag_pedantic_errors = pedantic = 1;
2179 case OPT_fcse_skip_blocks:
2180 case OPT_floop_optimize:
2181 case OPT_frerun_loop_opt:
2182 case OPT_fsched2_use_traces:
2183 case OPT_fstrength_reduce:
2184 case OPT_ftree_store_copy_prop:
2185 case OPT_fforce_addr:
2186 case OPT_ftree_salias:
2187 case OPT_ftree_store_ccp:
2188 case OPT_Wunreachable_code:
2189 case OPT_fargument_alias:
2190 case OPT_fargument_noalias:
2191 case OPT_fargument_noalias_anything:
2192 case OPT_fargument_noalias_global:
2193 /* These are no-ops, preserved for backward compatibility. */
2196 case OPT_fuse_linker_plugin:
2197 /* No-op. Used by the driver and passed to us because it starts with f.*/
2201 /* If the flag was handled in a standard way, assume the lack of
2202 processing here is intentional. */
2203 gcc_assert (cl_options[scode].flag_var);
2210 /* Handle --param NAME=VALUE. */
2212 handle_param (const char *carg)
2217 arg = xstrdup (carg);
2218 equal = strchr (arg, '=');
2220 error ("%s: --param arguments should be of the form NAME=VALUE", arg);
2223 value = integral_argument (equal + 1);
2225 error ("invalid --param value %qs", equal + 1);
2229 set_param_value (arg, value);
2236 /* Used to set the level of strict aliasing warnings,
2237 when no level is specified (i.e., when -Wstrict-aliasing, and not
2238 -Wstrict-aliasing=level was given).
2239 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2240 and 0 otherwise. After calling this function, wstrict_aliasing will be
2241 set to the default value of -Wstrict_aliasing=level, currently 3. */
2243 set_Wstrict_aliasing (int onoff)
2245 gcc_assert (onoff == 0 || onoff == 1);
2247 warn_strict_aliasing = 3;
2249 warn_strict_aliasing = 0;
2252 /* The following routines are useful in setting all the flags that
2253 -ffast-math and -fno-fast-math imply. */
2255 set_fast_math_flags (int set)
2257 flag_unsafe_math_optimizations = set;
2258 set_unsafe_math_optimizations_flags (set);
2259 flag_finite_math_only = set;
2260 flag_errno_math = !set;
2263 flag_signaling_nans = 0;
2264 flag_rounding_math = 0;
2265 flag_cx_limited_range = 1;
2269 /* When -funsafe-math-optimizations is set the following
2270 flags are set as well. */
2272 set_unsafe_math_optimizations_flags (int set)
2274 flag_trapping_math = !set;
2275 flag_signed_zeros = !set;
2276 flag_associative_math = set;
2277 flag_reciprocal_math = set;
2280 /* Return true iff flags are set as if -ffast-math. */
2282 fast_math_flags_set_p (void)
2284 return (!flag_trapping_math
2285 && flag_unsafe_math_optimizations
2286 && flag_finite_math_only
2287 && !flag_signed_zeros
2288 && !flag_errno_math);
2291 /* Return true iff flags are set as if -ffast-math but using the flags stored
2292 in the struct cl_optimization structure. */
2294 fast_math_flags_struct_set_p (struct cl_optimization *opt)
2296 return (!opt->flag_trapping_math
2297 && opt->flag_unsafe_math_optimizations
2298 && opt->flag_finite_math_only
2299 && !opt->flag_signed_zeros
2300 && !opt->flag_errno_math);
2303 /* Handle a debug output -g switch. EXTENDED is true or false to support
2304 extended output (2 is special and means "-ggdb" was given). */
2306 set_debug_level (enum debug_info_type type, int extended, const char *arg)
2308 static bool type_explicit;
2310 use_gnu_debug_info_extensions = extended;
2312 if (type == NO_DEBUG)
2314 if (write_symbols == NO_DEBUG)
2316 write_symbols = PREFERRED_DEBUGGING_TYPE;
2320 #ifdef DWARF2_DEBUGGING_INFO
2321 write_symbols = DWARF2_DEBUG;
2322 #elif defined DBX_DEBUGGING_INFO
2323 write_symbols = DBX_DEBUG;
2327 if (write_symbols == NO_DEBUG)
2328 warning (0, "target system does not support debug output");
2333 /* Does it conflict with an already selected type? */
2334 if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
2335 error ("debug format \"%s\" conflicts with prior selection",
2336 debug_type_names[type]);
2337 write_symbols = type;
2338 type_explicit = true;
2341 /* A debug flag without a level defaults to level 2. */
2344 if (!debug_info_level)
2345 debug_info_level = DINFO_LEVEL_NORMAL;
2349 int argval = integral_argument (arg);
2351 error ("unrecognised debug output level \"%s\"", arg);
2352 else if (argval > 3)
2353 error ("debug output level %s is too high", arg);
2355 debug_info_level = (enum debug_info_level) argval;
2359 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2360 a simple on-off switch. */
2363 option_enabled (int opt_idx)
2365 const struct cl_option *option = &(cl_options[opt_idx]);
2367 if (option->flag_var)
2368 switch (option->var_type)
2371 return *(int *) option->flag_var != 0;
2374 return *(int *) option->flag_var == option->var_value;
2376 case CLVC_BIT_CLEAR:
2377 return (*(int *) option->flag_var & option->var_value) == 0;
2380 return (*(int *) option->flag_var & option->var_value) != 0;
2388 /* Fill STATE with the current state of option OPTION. Return true if
2389 there is some state to store. */
2392 get_option_state (int option, struct cl_option_state *state)
2394 if (cl_options[option].flag_var == 0)
2397 switch (cl_options[option].var_type)
2401 state->data = cl_options[option].flag_var;
2402 state->size = sizeof (int);
2405 case CLVC_BIT_CLEAR:
2407 state->ch = option_enabled (option);
2408 state->data = &state->ch;
2413 state->data = *(const char **) cl_options[option].flag_var;
2414 if (state->data == 0)
2416 state->size = strlen ((const char *) state->data) + 1;
2422 /* Set *OPTION according to VALUE and ARG. */
2425 set_option (int opt_index, int value, const char *arg, int kind)
2427 const struct cl_option *option = &cl_options[opt_index];
2429 if (!option->flag_var)
2432 switch (option->var_type)
2435 *(int *) option->flag_var = value;
2439 *(int *) option->flag_var = (value
2441 : !option->var_value);
2444 case CLVC_BIT_CLEAR:
2446 if ((value != 0) == (option->var_type == CLVC_BIT_SET))
2447 *(int *) option->flag_var |= option->var_value;
2449 *(int *) option->flag_var &= ~option->var_value;
2450 if (option->flag_var == &target_flags)
2451 target_flags_explicit |= option->var_value;
2455 *(const char **) option->flag_var = arg;
2459 if ((diagnostic_t)kind != DK_UNSPECIFIED)
2460 diagnostic_classify_diagnostic (global_dc, opt_index, (diagnostic_t)kind);
2464 /* Callback function, called when -Werror= enables a warning. */
2466 static void (*warning_as_error_callback) (int) = NULL;
2468 /* Register a callback for enable_warning_as_error calls. */
2471 register_warning_as_error_callback (void (*callback) (int))
2473 gcc_assert (warning_as_error_callback == NULL || callback == NULL);
2474 warning_as_error_callback = callback;
2477 /* Enable a warning option as an error. This is used by -Werror= and
2478 also by legacy Werror-implicit-function-declaration. */
2481 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask)
2486 new_option = XNEWVEC (char, strlen (arg) + 2);
2487 new_option[0] = 'W';
2488 strcpy (new_option + 1, arg);
2489 option_index = find_opt (new_option, lang_mask);
2490 if (option_index == N_OPTS)
2492 error ("-Werror=%s: No option -%s", arg, new_option);
2496 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2498 diagnostic_classify_diagnostic (global_dc, option_index, kind);
2499 if (kind == DK_ERROR)
2501 const struct cl_option * const option = cl_options + option_index;
2503 /* -Werror=foo implies -Wfoo. */
2504 if (option->var_type == CLVC_BOOLEAN)
2505 handle_option (option_index, value, arg, lang_mask, (int)kind);
2507 if (warning_as_error_callback)
2508 warning_as_error_callback (option_index);