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/>. */
27 #ifdef HAVE_SYS_RESOURCE_H
28 # include <sys/resource.h>
32 #include "coretypes.h"
33 #include "tm.h" /* Needed by rtl.h and used for DWARF2_DEBUGGING_INFO
34 and DBX_DEBUGGING_INFO. */
35 #include "tree.h" /* For vect_set_verbosity_level. */
36 #include "rtl.h" /* Needed by insn-attr.h. */
41 #include "diagnostic.h"
42 #include "opts-diagnostic.h"
43 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
46 /* Run the second compilation of -fcompare-debug. Not defined using
47 Var in common.opt because this is used in Ada code and so must be
48 an actual variable not a macro. */
49 int flag_compare_debug;
51 /* Parse the -femit-struct-debug-detailed option value
52 and set the flag variables. */
54 #define MATCH( prefix, string ) \
55 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
56 ? ((string += sizeof prefix - 1), 1) : 0)
59 set_struct_debug_option (struct gcc_options *opts, location_t loc,
62 /* various labels for comparison */
63 static const char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
64 static const char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
65 static const char none_lbl[] = "none", any_lbl[] = "any";
66 static const char base_lbl[] = "base", sys_lbl[] = "sys";
68 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
69 /* Default is to apply to as much as possible. */
70 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
74 if (MATCH (dfn_lbl, spec))
75 usage = DINFO_USAGE_DFN;
76 else if (MATCH (dir_lbl, spec))
77 usage = DINFO_USAGE_DIR_USE;
78 else if (MATCH (ind_lbl, spec))
79 usage = DINFO_USAGE_IND_USE;
81 /* Generics or not? */
82 if (MATCH (ord_lbl, spec))
84 else if (MATCH (gen_lbl, spec))
87 /* What allowable environment? */
88 if (MATCH (none_lbl, spec))
89 files = DINFO_STRUCT_FILE_NONE;
90 else if (MATCH (any_lbl, spec))
91 files = DINFO_STRUCT_FILE_ANY;
92 else if (MATCH (sys_lbl, spec))
93 files = DINFO_STRUCT_FILE_SYS;
94 else if (MATCH (base_lbl, spec))
95 files = DINFO_STRUCT_FILE_BASE;
98 "argument %qs to %<-femit-struct-debug-detailed%> "
102 /* Effect the specification. */
103 if (usage == DINFO_USAGE_NUM_ENUMS)
107 opts->x_debug_struct_ordinary[DINFO_USAGE_DFN] = files;
108 opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
109 opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
113 opts->x_debug_struct_generic[DINFO_USAGE_DFN] = files;
114 opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
115 opts->x_debug_struct_generic[DINFO_USAGE_IND_USE] = files;
121 opts->x_debug_struct_ordinary[usage] = files;
123 opts->x_debug_struct_generic[usage] = files;
127 set_struct_debug_option (opts, loc, spec+1);
130 /* No more -femit-struct-debug-detailed specifications.
134 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
136 if (opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE]
137 < opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE]
138 || opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE]
139 < opts->x_debug_struct_generic[DINFO_USAGE_IND_USE])
141 "%<-femit-struct-debug-detailed=dir:...%> must allow "
142 "at least as much as "
143 "%<-femit-struct-debug-detailed=ind:...%>");
147 /* Strip off a legitimate source ending from the input string NAME of
148 length LEN. Rather than having to know the names used by all of
149 our front ends, we strip off an ending of a period followed by
150 up to five characters. (Java uses ".class".) */
153 strip_off_ending (char *name, int len)
156 for (i = 2; i < 6 && len > i; i++)
158 if (name[len - i] == '.')
160 name[len - i] = '\0';
166 /* Find the base name of a path, stripping off both directories and
167 a single final extension. */
169 base_of_path (const char *path, const char **base_out)
171 const char *base = path;
173 const char *p = path;
177 if (IS_DIR_SEPARATOR(c))
192 /* What to print when a switch has no documentation. */
193 static const char undocumented_msg[] = N_("This switch lacks documentation");
195 typedef char *char_p; /* For DEF_VEC_P. */
197 DEF_VEC_ALLOC_P(char_p,heap);
199 static void handle_param (struct gcc_options *opts,
200 struct gcc_options *opts_set, location_t loc,
202 static void set_debug_level (enum debug_info_type type, int extended,
203 const char *arg, struct gcc_options *opts,
204 struct gcc_options *opts_set,
206 static void set_fast_math_flags (struct gcc_options *opts, int set);
207 static void decode_d_option (const char *arg, struct gcc_options *opts,
208 location_t loc, diagnostic_context *dc);
209 static void set_unsafe_math_optimizations_flags (struct gcc_options *opts,
211 static void enable_warning_as_error (const char *arg, int value,
212 unsigned int lang_mask,
213 const struct cl_option_handlers *handlers,
214 struct gcc_options *opts,
215 struct gcc_options *opts_set,
217 diagnostic_context *dc);
219 /* Handle a back-end option; arguments and return value as for
223 target_handle_option (struct gcc_options *opts,
224 struct gcc_options *opts_set,
225 const struct cl_decoded_option *decoded,
226 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
227 location_t loc ATTRIBUTE_UNUSED,
228 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
229 diagnostic_context *dc)
231 gcc_assert (opts == &global_options);
232 gcc_assert (opts_set == &global_options_set);
233 gcc_assert (dc == global_dc);
234 gcc_assert (decoded->canonical_option_num_elements <= 2);
235 gcc_assert (kind == DK_UNSPECIFIED);
236 /* Although the location is not passed down to
237 targetm.handle_option, do not make assertions about its value;
238 options may come from optimize attributes and having the correct
239 location in the handler is not generally important. */
240 return targetm.handle_option (decoded->opt_index, decoded->arg,
244 /* Add comma-separated strings to a char_p vector. */
247 add_comma_separated_to_vector (void **pvec, const char *arg)
253 VEC(char_p,heap) *vec = (VEC(char_p,heap) *) *pvec;
255 /* We never free this string. */
268 VEC_safe_push (char_p, heap, vec, token_start);
271 if (*r == '\\' && r[1] == ',')
279 if (*token_start != '\0')
280 VEC_safe_push (char_p, heap, vec, token_start);
285 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
288 init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set)
290 size_t num_params = get_num_compiler_params ();
292 *opts = global_options_init;
293 memset (opts_set, 0, sizeof (*opts_set));
295 opts->x_param_values = XNEWVEC (int, num_params);
296 opts_set->x_param_values = XCNEWVEC (int, num_params);
297 init_param_values (opts->x_param_values);
299 /* Use priority coloring if cover classes is not defined for the
301 if (targetm.ira_cover_classes == NULL)
302 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
304 /* Initialize whether `char' is signed. */
305 opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR;
306 /* Set this to a special "uninitialized" value. The actual default
307 is set after target options have been processed. */
308 opts->x_flag_short_enums = 2;
310 /* Initialize target_flags before targetm.target_option.optimization
311 so the latter can modify it. */
312 opts->x_target_flags = targetm.default_target_flags;
314 /* Some targets have ABI-specified unwind tables. */
315 opts->x_flag_unwind_tables = targetm.unwind_tables_default;
317 /* Some targets have other target-specific initialization. */
318 targetm.target_option.init_struct (opts);
321 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
322 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
323 OPTS_SET, diagnostic context DC, location LOC, with language mask
324 LANG_MASK and option handlers HANDLERS. */
327 maybe_default_option (struct gcc_options *opts,
328 struct gcc_options *opts_set,
329 const struct default_options *default_opt,
330 int level, bool size, bool fast,
331 unsigned int lang_mask,
332 const struct cl_option_handlers *handlers,
334 diagnostic_context *dc)
336 const struct cl_option *option = &cl_options[default_opt->opt_index];
340 gcc_assert (level == 2);
342 gcc_assert (level == 3);
344 switch (default_opt->levels)
350 case OPT_LEVELS_0_ONLY:
351 enabled = (level == 0);
354 case OPT_LEVELS_1_PLUS:
355 enabled = (level >= 1);
358 case OPT_LEVELS_1_PLUS_SPEED_ONLY:
359 enabled = (level >= 1 && !size);
362 case OPT_LEVELS_2_PLUS:
363 enabled = (level >= 2);
366 case OPT_LEVELS_2_PLUS_SPEED_ONLY:
367 enabled = (level >= 2 && !size);
370 case OPT_LEVELS_3_PLUS:
371 enabled = (level >= 3);
374 case OPT_LEVELS_3_PLUS_AND_SIZE:
375 enabled = (level >= 3 || size);
378 case OPT_LEVELS_SIZE:
382 case OPT_LEVELS_FAST:
386 case OPT_LEVELS_NONE:
392 handle_generated_option (opts, opts_set, default_opt->opt_index,
393 default_opt->arg, default_opt->value,
394 lang_mask, DK_UNSPECIFIED, loc,
396 else if (default_opt->arg == NULL
397 && !(option->flags & CL_REJECT_NEGATIVE))
398 handle_generated_option (opts, opts_set, default_opt->opt_index,
399 default_opt->arg, !default_opt->value,
400 lang_mask, DK_UNSPECIFIED, loc,
404 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
405 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
406 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
407 language mask LANG_MASK and option handlers HANDLERS. */
410 maybe_default_options (struct gcc_options *opts,
411 struct gcc_options *opts_set,
412 const struct default_options *default_opts,
413 int level, bool size, bool fast,
414 unsigned int lang_mask,
415 const struct cl_option_handlers *handlers,
417 diagnostic_context *dc)
421 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++)
422 maybe_default_option (opts, opts_set, &default_opts[i],
423 level, size, fast, lang_mask, handlers, loc, dc);
426 /* Table of options enabled by default at different levels. */
428 static const struct default_options default_options_table[] =
430 /* -O1 optimizations. */
431 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
433 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 },
435 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
436 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
437 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
438 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 },
439 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 },
440 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
441 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
442 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
443 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
444 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
445 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
446 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 },
447 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
448 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
449 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
450 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
451 { OPT_LEVELS_1_PLUS, OPT_ftree_sra, NULL, 1 },
452 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 },
453 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
454 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
455 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
456 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
457 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
459 /* -O2 optimizations. */
460 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
461 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
462 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
463 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
464 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
465 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
466 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
467 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
468 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
469 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
470 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
471 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
472 #ifdef INSN_SCHEDULING
473 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
474 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
475 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
477 { OPT_LEVELS_2_PLUS, OPT_fregmove, NULL, 1 },
478 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
479 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
480 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
481 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
482 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
483 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
484 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
485 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
486 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
487 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
488 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 },
489 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 },
490 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 },
491 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 },
493 /* -O3 optimizations. */
494 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
495 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
496 /* Inlining of functions reducing size is a good idea with -Os
497 regardless of them being declared inline. */
498 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
499 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
500 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
501 { OPT_LEVELS_3_PLUS, OPT_ftree_vectorize, NULL, 1 },
502 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
504 /* -Ofast adds optimizations to -O3. */
505 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
507 { OPT_LEVELS_NONE, 0, NULL, 0 }
510 /* Default the options in OPTS and OPTS_SET based on the optimization
511 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
513 default_options_optimization (struct gcc_options *opts,
514 struct gcc_options *opts_set,
515 struct cl_decoded_option *decoded_options,
516 unsigned int decoded_options_count,
518 unsigned int lang_mask,
519 const struct cl_option_handlers *handlers,
520 diagnostic_context *dc)
526 /* Scan to see what optimization level has been specified. That will
527 determine the default value of many flags. */
528 for (i = 1; i < decoded_options_count; i++)
530 struct cl_decoded_option *opt = &decoded_options[i];
531 switch (opt->opt_index)
534 if (*opt->arg == '\0')
536 opts->x_optimize = 1;
537 opts->x_optimize_size = 0;
542 const int optimize_val = integral_argument (opt->arg);
543 if (optimize_val == -1)
545 "argument to %qs should be a non-negative integer",
549 opts->x_optimize = optimize_val;
550 if ((unsigned int) opts->x_optimize > 255)
551 opts->x_optimize = 255;
552 opts->x_optimize_size = 0;
559 opts->x_optimize_size = 1;
561 /* Optimizing for size forces optimize to be 2. */
562 opts->x_optimize = 2;
567 /* -Ofast only adds flags to -O3. */
568 opts->x_optimize_size = 0;
569 opts->x_optimize = 3;
574 /* Ignore other options in this prescan. */
579 maybe_default_options (opts, opts_set, default_options_table,
580 opts->x_optimize, opts->x_optimize_size,
581 ofast, lang_mask, handlers, loc, dc);
583 /* -O2 param settings. */
584 opt2 = (opts->x_optimize >= 2);
586 /* Track fields in field-sensitive alias analysis. */
587 maybe_set_param_value
588 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
589 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE),
590 opts->x_param_values, opts_set->x_param_values);
592 /* For -O1 only do loop invariant motion for very small loops. */
593 maybe_set_param_value
594 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
595 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000,
596 opts->x_param_values, opts_set->x_param_values);
598 if (opts->x_optimize_size)
599 /* We want to crossjump as much as possible. */
600 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1,
601 opts->x_param_values, opts_set->x_param_values);
603 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS,
604 default_param_value (PARAM_MIN_CROSSJUMP_INSNS),
605 opts->x_param_values, opts_set->x_param_values);
607 /* Allow default optimizations to be specified on a per-machine basis. */
608 maybe_default_options (opts, opts_set,
609 targetm.target_option.optimization_table,
610 opts->x_optimize, opts->x_optimize_size,
611 ofast, lang_mask, handlers, loc, dc);
614 /* After all options at LOC have been read into OPTS and OPTS_SET,
615 finalize settings of those options and diagnose incompatible
618 finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
621 enum unwind_info_type ui_except;
623 /* These assertions are because of the use of target hooks that
624 still access global data rather than being passed an options
625 structure pointer. */
626 gcc_assert (opts == &global_options);
627 gcc_assert (opts_set = &global_options_set);
629 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name))
631 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
632 OPTS->X_DUMP_DIR_NAME directory. Then try to make
633 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
634 directory, typically the directory to contain the object
636 if (opts->x_dump_dir_name)
637 opts->x_dump_base_name = concat (opts->x_dump_dir_name,
638 opts->x_dump_base_name, NULL);
639 else if (opts->x_aux_base_name)
641 const char *aux_base;
643 base_of_path (opts->x_aux_base_name, &aux_base);
644 if (opts->x_aux_base_name != aux_base)
646 int dir_len = aux_base - opts->x_aux_base_name;
647 char *new_dump_base_name =
648 XNEWVEC (char, strlen (opts->x_dump_base_name) + dir_len + 1);
650 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
651 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len);
652 /* Append existing OPTS->X_DUMP_BASE_NAME. */
653 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name);
654 opts->x_dump_base_name = new_dump_base_name;
659 /* Handle related options for unit-at-a-time, toplevel-reorder, and
661 if (!opts->x_flag_unit_at_a_time)
663 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
664 error_at (loc, "section anchors must be disabled when unit-at-a-time "
666 opts->x_flag_section_anchors = 0;
667 if (opts->x_flag_toplevel_reorder == 1)
668 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time "
670 opts->x_flag_toplevel_reorder = 0;
673 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
674 if (opts->x_warn_missing_noreturn)
675 opts->x_warn_suggest_attribute_noreturn = true;
677 /* Unless the user has asked for section anchors, we disable toplevel
678 reordering at -O0 to disable transformations that might be surprising
679 to end users and to get -fno-toplevel-reorder tested. */
680 if (!opts->x_optimize
681 && opts->x_flag_toplevel_reorder == 2
682 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors))
684 opts->x_flag_toplevel_reorder = 0;
685 opts->x_flag_section_anchors = 0;
687 if (!opts->x_flag_toplevel_reorder)
689 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
690 error_at (loc, "section anchors must be disabled when toplevel reorder"
692 opts->x_flag_section_anchors = 0;
695 if (!opts->x_flag_opts_finished)
697 if (opts->x_flag_pie)
698 opts->x_flag_pic = opts->x_flag_pie;
699 if (opts->x_flag_pic && !opts->x_flag_pie)
700 opts->x_flag_shlib = 1;
701 opts->x_flag_opts_finished = false;
704 if (opts->x_optimize == 0)
706 /* Inlining does not work if not optimizing,
707 so force it not to be done. */
708 opts->x_warn_inline = 0;
709 opts->x_flag_no_inline = 1;
712 /* The optimization to partition hot and cold basic blocks into separate
713 sections of the .o and executable files does not work (currently)
714 with exception handling. This is because there is no support for
715 generating unwind info. If opts->x_flag_exceptions is turned on
716 we need to turn off the partitioning optimization. */
718 ui_except = targetm.except_unwind_info ();
720 if (opts->x_flag_exceptions
721 && opts->x_flag_reorder_blocks_and_partition
722 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
725 "-freorder-blocks-and-partition does not work "
726 "with exceptions on this architecture");
727 opts->x_flag_reorder_blocks_and_partition = 0;
728 opts->x_flag_reorder_blocks = 1;
731 /* If user requested unwind info, then turn off the partitioning
734 if (opts->x_flag_unwind_tables
735 && !targetm.unwind_tables_default
736 && opts->x_flag_reorder_blocks_and_partition
737 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
740 "-freorder-blocks-and-partition does not support "
741 "unwind info on this architecture");
742 opts->x_flag_reorder_blocks_and_partition = 0;
743 opts->x_flag_reorder_blocks = 1;
746 /* If the target requested unwind info, then turn off the partitioning
747 optimization with a different message. Likewise, if the target does not
748 support named sections. */
750 if (opts->x_flag_reorder_blocks_and_partition
751 && (!targetm.have_named_sections
752 || (opts->x_flag_unwind_tables
753 && targetm.unwind_tables_default
754 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))))
757 "-freorder-blocks-and-partition does not work "
758 "on this architecture");
759 opts->x_flag_reorder_blocks_and_partition = 0;
760 opts->x_flag_reorder_blocks = 1;
763 /* Pipelining of outer loops is only possible when general pipelining
764 capabilities are requested. */
765 if (!opts->x_flag_sel_sched_pipelining)
766 opts->x_flag_sel_sched_pipelining_outer_loops = 0;
768 if (!targetm.ira_cover_classes
769 && opts->x_flag_ira_algorithm == IRA_ALGORITHM_CB)
772 "-fira-algorithm=CB does not work on this architecture");
773 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
776 if (opts->x_flag_conserve_stack)
778 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100,
779 opts->x_param_values, opts_set->x_param_values);
780 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40,
781 opts->x_param_values, opts_set->x_param_values);
783 if (opts->x_flag_wpa || opts->x_flag_ltrans)
785 /* These passes are not WHOPR compatible yet. */
786 opts->x_flag_ipa_pta = 0;
787 opts->x_flag_ipa_struct_reorg = 0;
790 if (opts->x_flag_lto)
793 opts->x_flag_generate_lto = 1;
795 /* When generating IL, do not operate in whole-program mode.
796 Otherwise, symbols will be privatized too early, causing link
798 opts->x_flag_whole_program = 0;
800 error_at (loc, "LTO support has not been enabled in this configuration");
803 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
804 + (opts->x_flag_lto_partition_none != 0) >= 1)
806 if ((opts->x_flag_lto_partition_balanced != 0)
807 + (opts->x_flag_lto_partition_1to1 != 0)
808 + (opts->x_flag_lto_partition_none != 0) > 1)
809 error_at (loc, "only one -flto-partition value can be specified");
812 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
813 default value if they choose based on other options. */
814 if (opts->x_flag_split_stack == -1)
815 opts->x_flag_split_stack = 0;
816 else if (opts->x_flag_split_stack)
818 if (!targetm.supports_split_stack (true))
820 error_at (loc, "%<-fsplit-stack%> is not supported by "
821 "this compiler configuration");
822 opts->x_flag_split_stack = 0;
827 #define LEFT_COLUMN 27
829 /* Output ITEM, of length ITEM_WIDTH, in the left column,
830 followed by word-wrapped HELP in a second column. */
832 wrap_help (const char *help,
834 unsigned int item_width,
835 unsigned int columns)
837 unsigned int col_width = LEFT_COLUMN;
838 unsigned int remaining, room, len;
840 remaining = strlen (help);
844 room = columns - 3 - MAX (col_width, item_width);
853 for (i = 0; help[i]; i++)
855 if (i >= room && len != remaining)
859 else if ((help[i] == '-' || help[i] == '/')
860 && help[i + 1] != ' '
861 && i > 0 && ISALPHA (help[i - 1]))
866 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
868 while (help[len] == ' ')
876 /* Print help for a specific front-end, etc. */
878 print_filtered_help (unsigned int include_flags,
879 unsigned int exclude_flags,
880 unsigned int any_flags,
881 unsigned int columns,
882 struct gcc_options *opts)
887 bool displayed = false;
889 if (include_flags == CL_PARAMS)
891 for (i = 0; i < LAST_PARAM; i++)
893 const char *param = compiler_params[i].option;
895 help = compiler_params[i].help;
896 if (help == NULL || *help == '\0')
898 if (exclude_flags & CL_UNDOCUMENTED)
900 help = undocumented_msg;
903 /* Get the translation. */
906 wrap_help (help, param, strlen (param), columns);
912 if (!opts->x_help_printed)
913 opts->x_help_printed = XCNEWVAR (char, cl_options_count);
915 for (i = 0; i < cl_options_count; i++)
918 const struct cl_option *option = cl_options + i;
923 if (include_flags == 0
924 || ((option->flags & include_flags) != include_flags))
926 if ((option->flags & any_flags) == 0)
930 /* Skip unwanted switches. */
931 if ((option->flags & exclude_flags) != 0)
934 /* The driver currently prints its own help text. */
935 if ((option->flags & CL_DRIVER) != 0
936 && (option->flags & (((1U << cl_lang_count) - 1)
937 | CL_COMMON | CL_TARGET)) == 0)
941 /* Skip switches that have already been printed. */
942 if (opts->x_help_printed[i])
945 opts->x_help_printed[i] = true;
950 if (exclude_flags & CL_UNDOCUMENTED)
952 help = undocumented_msg;
955 /* Get the translation. */
958 /* Find the gap between the name of the
959 option and its descriptive text. */
960 tab = strchr (help, '\t');
969 opt = option->opt_text;
973 /* With the -Q option enabled we change the descriptive text associated
974 with an option to be an indication of its current setting. */
977 void *flag_var = option_flag_var (i, opts);
979 if (len < (LEFT_COLUMN + 2))
980 strcpy (new_help, "\t\t");
982 strcpy (new_help, "\t");
985 && option->var_type != CLVC_DEFER)
987 if (option->flags & CL_JOINED)
989 if (option->var_type == CLVC_STRING)
991 if (* (const char **) flag_var != NULL)
992 snprintf (new_help + strlen (new_help),
993 sizeof (new_help) - strlen (new_help),
994 * (const char **) flag_var);
997 sprintf (new_help + strlen (new_help),
998 "%#x", * (int *) flag_var);
1001 strcat (new_help, option_enabled (i, opts)
1002 ? _("[enabled]") : _("[disabled]"));
1008 wrap_help (help, opt, len, columns);
1014 unsigned int langs = include_flags & CL_LANG_ALL;
1017 printf (_(" No options with the desired characteristics were found\n"));
1022 /* PR 31349: Tell the user how to see all of the
1023 options supported by a specific front end. */
1024 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1025 if ((1U << i) & langs)
1026 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1027 lang_names[i], lang_names[i]);
1031 else if (! displayed)
1032 printf (_(" All options with the desired characteristics have already been displayed\n"));
1037 /* Display help for a specified type of option.
1038 The options must have ALL of the INCLUDE_FLAGS set
1039 ANY of the flags in the ANY_FLAGS set
1040 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1043 print_specific_help (unsigned int include_flags,
1044 unsigned int exclude_flags,
1045 unsigned int any_flags,
1046 struct gcc_options *opts)
1048 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1049 const char * description = NULL;
1050 const char * descrip_extra = "";
1054 /* Sanity check: Make sure that we do not have more
1055 languages than we have bits available to enumerate them. */
1056 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1058 /* If we have not done so already, obtain
1059 the desired maximum width of the output. */
1060 if (opts->x_help_columns == 0)
1064 GET_ENVIRONMENT (p, "COLUMNS");
1067 int value = atoi (p);
1070 opts->x_help_columns = value;
1073 if (opts->x_help_columns == 0)
1074 /* Use a reasonable default. */
1075 opts->x_help_columns = 80;
1078 /* Decide upon the title for the options that we are going to display. */
1079 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1081 switch (flag & include_flags)
1088 description = _("The following options are target specific");
1091 description = _("The following options control compiler warning messages");
1093 case CL_OPTIMIZATION:
1094 description = _("The following options control optimizations");
1097 description = _("The following options are language-independent");
1100 description = _("The --param option recognizes the following as parameters");
1103 if (i >= cl_lang_count)
1105 if (exclude_flags & all_langs_mask)
1106 description = _("The following options are specific to just the language ");
1108 description = _("The following options are supported by the language ");
1109 descrip_extra = lang_names [i];
1114 if (description == NULL)
1118 if (include_flags & CL_UNDOCUMENTED)
1119 description = _("The following options are not documented");
1120 else if (include_flags & CL_SEPARATE)
1121 description = _("The following options take separate arguments");
1122 else if (include_flags & CL_JOINED)
1123 description = _("The following options take joined arguments");
1126 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1133 if (any_flags & all_langs_mask)
1134 description = _("The following options are language-related");
1136 description = _("The following options are language-independent");
1140 printf ("%s%s:\n", description, descrip_extra);
1141 print_filtered_help (include_flags, exclude_flags, any_flags,
1142 opts->x_help_columns, opts);
1145 /* Handle target- and language-independent options. Return zero to
1146 generate an "unknown option" message. Only options that need
1147 extra handling need to be listed here; if you simply want
1148 DECODED->value assigned to a variable, it happens automatically. */
1151 common_handle_option (struct gcc_options *opts,
1152 struct gcc_options *opts_set,
1153 const struct cl_decoded_option *decoded,
1154 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1156 const struct cl_option_handlers *handlers,
1157 diagnostic_context *dc)
1159 size_t scode = decoded->opt_index;
1160 const char *arg = decoded->arg;
1161 int value = decoded->value;
1162 enum opt_code code = (enum opt_code) scode;
1164 gcc_assert (opts == &global_options);
1165 gcc_assert (opts_set == &global_options_set);
1166 gcc_assert (dc == global_dc);
1167 gcc_assert (decoded->canonical_option_num_elements <= 2);
1172 handle_param (opts, opts_set, loc, arg);
1177 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1178 unsigned int undoc_mask;
1181 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings)
1184 /* First display any single language specific options. */
1185 for (i = 0; i < cl_lang_count; i++)
1187 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts);
1188 /* Next display any multi language specific options. */
1189 print_specific_help (0, undoc_mask, all_langs_mask, opts);
1190 /* Then display any remaining, non-language options. */
1191 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1193 print_specific_help (i, undoc_mask, 0, opts);
1194 opts->x_exit_after_options = true;
1198 case OPT__target_help:
1199 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts);
1200 opts->x_exit_after_options = true;
1202 /* Allow the target a chance to give the user some additional information. */
1209 const char * a = arg;
1210 unsigned int include_flags = 0;
1211 /* Note - by default we include undocumented options when listing
1212 specific classes. If you only want to see documented options
1213 then add ",^undocumented" to the --help= option. E.g.:
1215 --help=target,^undocumented */
1216 unsigned int exclude_flags = 0;
1218 /* Walk along the argument string, parsing each word in turn.
1220 arg = [^]{word}[,{arg}]
1221 word = {optimizers|target|warnings|undocumented|
1222 params|common|<language>} */
1227 const char * string;
1232 { "optimizers", CL_OPTIMIZATION },
1233 { "target", CL_TARGET },
1234 { "warnings", CL_WARNING },
1235 { "undocumented", CL_UNDOCUMENTED },
1236 { "params", CL_PARAMS },
1237 { "joined", CL_JOINED },
1238 { "separate", CL_SEPARATE },
1239 { "common", CL_COMMON },
1242 unsigned int * pflags;
1244 unsigned int lang_flag, specific_flag;
1251 pflags = & exclude_flags;
1254 pflags = & include_flags;
1256 comma = strchr (a, ',');
1267 /* Check to see if the string matches an option class name. */
1268 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1269 if (strncasecmp (a, specifics[i].string, len) == 0)
1271 specific_flag = specifics[i].flag;
1275 /* Check to see if the string matches a language name.
1276 Note - we rely upon the alpha-sorted nature of the entries in
1277 the lang_names array, specifically that shorter names appear
1278 before their longer variants. (i.e. C before C++). That way
1279 when we are attempting to match --help=c for example we will
1280 match with C first and not C++. */
1281 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1282 if (strncasecmp (a, lang_names[i], len) == 0)
1284 lang_flag = 1U << i;
1288 if (specific_flag != 0)
1291 * pflags |= specific_flag;
1294 /* The option's argument matches both the start of a
1295 language name and the start of an option class name.
1296 We have a special case for when the user has
1297 specified "--help=c", but otherwise we have to issue
1299 if (strncasecmp (a, "c", len) == 0)
1300 * pflags |= lang_flag;
1303 "--help argument %q.*s is ambiguous, "
1304 "please be more specific",
1308 else if (lang_flag != 0)
1309 * pflags |= lang_flag;
1312 "unrecognized argument to --help= option: %q.*s",
1321 print_specific_help (include_flags, exclude_flags, 0, opts);
1322 opts->x_exit_after_options = true;
1327 opts->x_exit_after_options = true;
1333 /* Currently handled in a prescan. */
1337 enable_warning_as_error (arg, value, lang_mask, handlers,
1338 opts, opts_set, loc, dc);
1341 case OPT_Wlarger_than_:
1342 opts->x_larger_than_size = value;
1343 opts->x_warn_larger_than = value != -1;
1346 case OPT_Wfatal_errors:
1347 dc->fatal_errors = value;
1350 case OPT_Wframe_larger_than_:
1351 opts->x_frame_larger_than_size = value;
1352 opts->x_warn_frame_larger_than = value != -1;
1355 case OPT_Wstrict_aliasing:
1356 set_Wstrict_aliasing (opts, value);
1359 case OPT_Wstrict_overflow:
1360 opts->x_warn_strict_overflow = (value
1361 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1365 case OPT_Wsystem_headers:
1366 dc->dc_warn_system_headers = value;
1370 opts->x_flag_gen_aux_info = 1;
1373 case OPT_auxbase_strip:
1375 char *tmp = xstrdup (arg);
1376 strip_off_ending (tmp, strlen (tmp));
1378 opts->x_aux_base_name = tmp;
1383 decode_d_option (arg, opts, loc, dc);
1386 case OPT_fcall_used_:
1387 case OPT_fcall_saved_:
1391 case OPT_fcompare_debug_second:
1392 flag_compare_debug = value;
1396 case OPT_fdbg_cnt_list:
1400 case OPT_fdebug_prefix_map_:
1404 case OPT_fdiagnostics_show_location_:
1405 if (!strcmp (arg, "once"))
1406 diagnostic_prefixing_rule (dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1407 else if (!strcmp (arg, "every-line"))
1408 diagnostic_prefixing_rule (dc)
1409 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1414 case OPT_fdiagnostics_show_option:
1415 dc->show_option_requested = value;
1422 case OPT_ffp_contract_:
1423 if (!strcmp (arg, "on"))
1424 /* Not implemented, fall back to conservative FP_CONTRACT_OFF. */
1425 opts->x_flag_fp_contract_mode = FP_CONTRACT_OFF;
1426 else if (!strcmp (arg, "off"))
1427 opts->x_flag_fp_contract_mode = FP_CONTRACT_OFF;
1428 else if (!strcmp (arg, "fast"))
1429 opts->x_flag_fp_contract_mode = FP_CONTRACT_FAST;
1431 error_at (loc, "unknown floating point contraction style \"%s\"", arg);
1434 case OPT_fexcess_precision_:
1435 if (!strcmp (arg, "fast"))
1436 opts->x_flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
1437 else if (!strcmp (arg, "standard"))
1438 opts->x_flag_excess_precision_cmdline = EXCESS_PRECISION_STANDARD;
1440 error_at (loc, "unknown excess precision style \"%s\"", arg);
1443 case OPT_ffast_math:
1444 set_fast_math_flags (opts, value);
1447 case OPT_funsafe_math_optimizations:
1448 set_unsafe_math_optimizations_flags (opts, value);
1455 case OPT_finline_limit_:
1456 set_param_value ("max-inline-insns-single", value / 2,
1457 opts->x_param_values, opts_set->x_param_values);
1458 set_param_value ("max-inline-insns-auto", value / 2,
1459 opts->x_param_values, opts_set->x_param_values);
1462 case OPT_finstrument_functions_exclude_function_list_:
1463 add_comma_separated_to_vector
1464 (&opts->x_flag_instrument_functions_exclude_functions, arg);
1467 case OPT_finstrument_functions_exclude_file_list_:
1468 add_comma_separated_to_vector
1469 (&opts->x_flag_instrument_functions_exclude_files, arg);
1472 case OPT_fmessage_length_:
1473 pp_set_line_maximum_length (dc->printer, value);
1476 case OPT_fpack_struct_:
1477 if (value <= 0 || (value & (value - 1)) || value > 16)
1479 "structure alignment must be a small power of two, not %d",
1482 opts->x_initial_max_fld_align = value;
1486 case OPT_fplugin_arg_:
1490 case OPT_fprofile_use_:
1491 opts->x_profile_data_prefix = xstrdup (arg);
1492 opts->x_flag_profile_use = true;
1494 /* No break here - do -fprofile-use processing. */
1495 case OPT_fprofile_use:
1496 if (!opts_set->x_flag_branch_probabilities)
1497 opts->x_flag_branch_probabilities = value;
1498 if (!opts_set->x_flag_profile_values)
1499 opts->x_flag_profile_values = value;
1500 if (!opts_set->x_flag_unroll_loops)
1501 opts->x_flag_unroll_loops = value;
1502 if (!opts_set->x_flag_peel_loops)
1503 opts->x_flag_peel_loops = value;
1504 if (!opts_set->x_flag_tracer)
1505 opts->x_flag_tracer = value;
1506 if (!opts_set->x_flag_value_profile_transformations)
1507 opts->x_flag_value_profile_transformations = value;
1508 if (!opts_set->x_flag_inline_functions)
1509 opts->x_flag_inline_functions = value;
1510 if (!opts_set->x_flag_ipa_cp)
1511 opts->x_flag_ipa_cp = value;
1512 if (!opts_set->x_flag_ipa_cp_clone
1513 && value && opts->x_flag_ipa_cp)
1514 opts->x_flag_ipa_cp_clone = value;
1515 if (!opts_set->x_flag_predictive_commoning)
1516 opts->x_flag_predictive_commoning = value;
1517 if (!opts_set->x_flag_unswitch_loops)
1518 opts->x_flag_unswitch_loops = value;
1519 if (!opts_set->x_flag_gcse_after_reload)
1520 opts->x_flag_gcse_after_reload = value;
1523 case OPT_fprofile_generate_:
1524 opts->x_profile_data_prefix = xstrdup (arg);
1526 /* No break here - do -fprofile-generate processing. */
1527 case OPT_fprofile_generate:
1528 if (!opts_set->x_profile_arc_flag)
1529 opts->x_profile_arc_flag = value;
1530 if (!opts_set->x_flag_profile_values)
1531 opts->x_flag_profile_values = value;
1532 if (!opts_set->x_flag_value_profile_transformations)
1533 opts->x_flag_value_profile_transformations = value;
1534 if (!opts_set->x_flag_inline_functions)
1535 opts->x_flag_inline_functions = value;
1538 case OPT_fshow_column:
1539 dc->show_column = value;
1542 case OPT_fvisibility_:
1544 if (!strcmp(arg, "default"))
1545 opts->x_default_visibility = VISIBILITY_DEFAULT;
1546 else if (!strcmp(arg, "internal"))
1547 opts->x_default_visibility = VISIBILITY_INTERNAL;
1548 else if (!strcmp(arg, "hidden"))
1549 opts->x_default_visibility = VISIBILITY_HIDDEN;
1550 else if (!strcmp(arg, "protected"))
1551 opts->x_default_visibility = VISIBILITY_PROTECTED;
1553 error_at (loc, "unrecognized visibility value \"%s\"", arg);
1557 case OPT_frandom_seed:
1558 /* The real switch is -fno-random-seed. */
1564 case OPT_frandom_seed_:
1568 case OPT_fsched_verbose_:
1569 #ifdef INSN_SCHEDULING
1570 /* Handled with Var in common.opt. */
1576 case OPT_fsched_stalled_insns_:
1577 opts->x_flag_sched_stalled_insns = value;
1578 if (opts->x_flag_sched_stalled_insns == 0)
1579 opts->x_flag_sched_stalled_insns = -1;
1582 case OPT_fsched_stalled_insns_dep_:
1583 opts->x_flag_sched_stalled_insns_dep = value;
1586 case OPT_fstack_check_:
1587 if (!strcmp (arg, "no"))
1588 flag_stack_check = NO_STACK_CHECK;
1589 else if (!strcmp (arg, "generic"))
1590 /* This is the old stack checking method. */
1591 flag_stack_check = STACK_CHECK_BUILTIN
1592 ? FULL_BUILTIN_STACK_CHECK
1593 : GENERIC_STACK_CHECK;
1594 else if (!strcmp (arg, "specific"))
1595 /* This is the new stack checking method. */
1596 flag_stack_check = STACK_CHECK_BUILTIN
1597 ? FULL_BUILTIN_STACK_CHECK
1598 : STACK_CHECK_STATIC_BUILTIN
1599 ? STATIC_BUILTIN_STACK_CHECK
1600 : GENERIC_STACK_CHECK;
1602 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg);
1605 case OPT_fstack_limit:
1606 /* The real switch is -fno-stack-limit. */
1612 case OPT_fstack_limit_register_:
1613 case OPT_fstack_limit_symbol_:
1617 case OPT_ftree_vectorizer_verbose_:
1618 vect_set_verbosity_level (arg);
1621 case OPT_ftls_model_:
1622 if (!strcmp (arg, "global-dynamic"))
1623 opts->x_flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
1624 else if (!strcmp (arg, "local-dynamic"))
1625 opts->x_flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
1626 else if (!strcmp (arg, "initial-exec"))
1627 opts->x_flag_tls_default = TLS_MODEL_INITIAL_EXEC;
1628 else if (!strcmp (arg, "local-exec"))
1629 opts->x_flag_tls_default = TLS_MODEL_LOCAL_EXEC;
1631 warning_at (loc, 0, "unknown tls-model \"%s\"", arg);
1634 case OPT_fira_algorithm_:
1635 if (!strcmp (arg, "CB"))
1636 opts->x_flag_ira_algorithm = IRA_ALGORITHM_CB;
1637 else if (!strcmp (arg, "priority"))
1638 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
1640 warning_at (loc, 0, "unknown ira algorithm \"%s\"", arg);
1643 case OPT_fira_region_:
1644 if (!strcmp (arg, "one"))
1645 opts->x_flag_ira_region = IRA_REGION_ONE;
1646 else if (!strcmp (arg, "all"))
1647 opts->x_flag_ira_region = IRA_REGION_ALL;
1648 else if (!strcmp (arg, "mixed"))
1649 opts->x_flag_ira_region = IRA_REGION_MIXED;
1651 warning_at (loc, 0, "unknown ira region \"%s\"", arg);
1655 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set,
1660 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
1664 if (value < 2 || value > 4)
1665 error_at (loc, "dwarf version %d is not supported", value);
1667 dwarf_version = value;
1668 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc);
1672 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
1677 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,
1682 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc);
1687 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set,
1691 case OPT_pedantic_errors:
1692 opts->x_pedantic = 1;
1693 dc->pedantic_errors = 1;
1697 opts->x_flag_lto = "";
1701 dc->dc_inhibit_warnings = true;
1704 case OPT_fmax_errors_:
1705 dc->max_errors = value;
1708 case OPT_fuse_linker_plugin:
1709 /* No-op. Used by the driver and passed to us because it starts with f.*/
1713 /* If the flag was handled in a standard way, assume the lack of
1714 processing here is intentional. */
1715 gcc_assert (option_flag_var (scode, opts));
1722 /* Handle --param NAME=VALUE. */
1724 handle_param (struct gcc_options *opts, struct gcc_options *opts_set,
1725 location_t loc, const char *carg)
1730 arg = xstrdup (carg);
1731 equal = strchr (arg, '=');
1733 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE",
1737 value = integral_argument (equal + 1);
1739 error_at (loc, "invalid --param value %qs", equal + 1);
1743 set_param_value (arg, value,
1744 opts->x_param_values, opts_set->x_param_values);
1751 /* Used to set the level of strict aliasing warnings in OPTS,
1752 when no level is specified (i.e., when -Wstrict-aliasing, and not
1753 -Wstrict-aliasing=level was given).
1754 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1755 and 0 otherwise. After calling this function, wstrict_aliasing will be
1756 set to the default value of -Wstrict_aliasing=level, currently 3. */
1758 set_Wstrict_aliasing (struct gcc_options *opts, int onoff)
1760 gcc_assert (onoff == 0 || onoff == 1);
1762 opts->x_warn_strict_aliasing = 3;
1764 opts->x_warn_strict_aliasing = 0;
1767 /* The following routines are useful in setting all the flags that
1768 -ffast-math and -fno-fast-math imply. */
1770 set_fast_math_flags (struct gcc_options *opts, int set)
1772 opts->x_flag_unsafe_math_optimizations = set;
1773 set_unsafe_math_optimizations_flags (opts, set);
1774 opts->x_flag_finite_math_only = set;
1775 opts->x_flag_errno_math = !set;
1778 opts->x_flag_signaling_nans = 0;
1779 opts->x_flag_rounding_math = 0;
1780 opts->x_flag_cx_limited_range = 1;
1784 /* When -funsafe-math-optimizations is set the following
1785 flags are set as well. */
1787 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
1789 opts->x_flag_trapping_math = !set;
1790 opts->x_flag_signed_zeros = !set;
1791 opts->x_flag_associative_math = set;
1792 opts->x_flag_reciprocal_math = set;
1795 /* Return true iff flags in OPTS are set as if -ffast-math. */
1797 fast_math_flags_set_p (const struct gcc_options *opts)
1799 return (!opts->x_flag_trapping_math
1800 && opts->x_flag_unsafe_math_optimizations
1801 && opts->x_flag_finite_math_only
1802 && !opts->x_flag_signed_zeros
1803 && !opts->x_flag_errno_math);
1806 /* Return true iff flags are set as if -ffast-math but using the flags stored
1807 in the struct cl_optimization structure. */
1809 fast_math_flags_struct_set_p (struct cl_optimization *opt)
1811 return (!opt->x_flag_trapping_math
1812 && opt->x_flag_unsafe_math_optimizations
1813 && opt->x_flag_finite_math_only
1814 && !opt->x_flag_signed_zeros
1815 && !opt->x_flag_errno_math);
1818 /* Handle a debug output -g switch for options OPTS
1819 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1820 explicitly), location LOC. EXTENDED is true or false to support
1821 extended output (2 is special and means "-ggdb" was given). */
1823 set_debug_level (enum debug_info_type type, int extended, const char *arg,
1824 struct gcc_options *opts, struct gcc_options *opts_set,
1827 opts->x_use_gnu_debug_info_extensions = extended;
1829 if (type == NO_DEBUG)
1831 if (opts->x_write_symbols == NO_DEBUG)
1833 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE;
1837 #ifdef DWARF2_DEBUGGING_INFO
1838 opts->x_write_symbols = DWARF2_DEBUG;
1839 #elif defined DBX_DEBUGGING_INFO
1840 opts->x_write_symbols = DBX_DEBUG;
1844 if (opts->x_write_symbols == NO_DEBUG)
1845 warning_at (loc, 0, "target system does not support debug output");
1850 /* Does it conflict with an already selected type? */
1851 if (opts_set->x_write_symbols != NO_DEBUG
1852 && opts->x_write_symbols != NO_DEBUG
1853 && type != opts->x_write_symbols)
1854 error_at (loc, "debug format \"%s\" conflicts with prior selection",
1855 debug_type_names[type]);
1856 opts->x_write_symbols = type;
1857 opts_set->x_write_symbols = type;
1860 /* A debug flag without a level defaults to level 2. */
1863 if (!opts->x_debug_info_level)
1864 opts->x_debug_info_level = DINFO_LEVEL_NORMAL;
1868 int argval = integral_argument (arg);
1870 error_at (loc, "unrecognised debug output level \"%s\"", arg);
1871 else if (argval > 3)
1872 error_at (loc, "debug output level %s is too high", arg);
1874 opts->x_debug_info_level = (enum debug_info_levels) argval;
1878 /* Arrange to dump core on error for diagnostic context DC. (The
1879 regular error message is still printed first, except in the case of
1883 setup_core_dumping (diagnostic_context *dc)
1886 signal (SIGABRT, SIG_DFL);
1888 #if defined(HAVE_SETRLIMIT)
1891 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
1892 fatal_error ("getting core file size maximum limit: %m");
1893 rlim.rlim_cur = rlim.rlim_max;
1894 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
1895 fatal_error ("setting core file size limit to maximum: %m");
1898 diagnostic_abort_on_error (dc);
1901 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1902 diagnostic context DC. */
1905 decode_d_option (const char *arg, struct gcc_options *opts,
1906 location_t loc, diagnostic_context *dc)
1914 opts->x_flag_debug_asm = 1;
1917 opts->x_flag_print_asm_name = 1;
1920 opts->x_flag_dump_rtl_in_asm = 1;
1921 opts->x_flag_print_asm_name = 1;
1924 opts->x_graph_dump_format = vcg;
1927 opts->x_rtl_dump_and_exit = 1;
1929 case 'D': /* These are handled by the preprocessor. */
1936 setup_core_dumping (dc);
1939 opts->x_flag_dump_all_passed = true;
1943 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c);
1948 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1949 mask LANG_MASK, option handlers HANDLERS) as an error for option
1950 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1951 NULL), location LOC. This is used by -Werror=. */
1954 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
1955 const struct cl_option_handlers *handlers,
1956 struct gcc_options *opts,
1957 struct gcc_options *opts_set,
1958 location_t loc, diagnostic_context *dc)
1963 new_option = XNEWVEC (char, strlen (arg) + 2);
1964 new_option[0] = 'W';
1965 strcpy (new_option + 1, arg);
1966 option_index = find_opt (new_option, lang_mask);
1967 if (option_index == OPT_SPECIAL_unknown)
1969 error_at (loc, "-Werror=%s: no option -%s", arg, new_option);
1973 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
1975 control_warning_option (option_index, (int) kind, value,
1977 handlers, opts, opts_set, dc);
1982 /* Return malloced memory for the name of the option OPTION_INDEX
1983 which enabled a diagnostic (context CONTEXT), originally of type
1984 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1988 option_name (diagnostic_context *context, int option_index,
1989 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
1993 /* A warning classified as an error. */
1994 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
1995 && diag_kind == DK_ERROR)
1996 return concat (cl_options[OPT_Werror_].opt_text,
1997 /* Skip over "-W". */
1998 cl_options[option_index].opt_text + 2,
2000 /* A warning with option. */
2002 return xstrdup (cl_options[option_index].opt_text);
2004 /* A warning without option classified as an error. */
2005 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2006 || diag_kind == DK_WARNING)
2008 if (context->warning_as_error_requested)
2009 return xstrdup (cl_options[OPT_Werror].opt_text);
2011 return xstrdup (_("enabled by default"));