1 /* Command line option handling.
2 Copyright (C) 2002-2014 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
27 #include "tm.h" /* For STACK_CHECK_BUILTIN,
28 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
29 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
32 #include "diagnostic.h"
33 #include "diagnostic-color.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 static void set_Wstrict_aliasing (struct gcc_options *opts, int onoff);
40 /* Indexed by enum debug_info_type. */
41 const char *const debug_type_names[] =
43 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
46 /* Parse the -femit-struct-debug-detailed option value
47 and set the flag variables. */
49 #define MATCH( prefix, string ) \
50 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
51 ? ((string += sizeof prefix - 1), 1) : 0)
54 set_struct_debug_option (struct gcc_options *opts, location_t loc,
57 /* various labels for comparison */
58 static const char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
59 static const char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
60 static const char none_lbl[] = "none", any_lbl[] = "any";
61 static const char base_lbl[] = "base", sys_lbl[] = "sys";
63 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
64 /* Default is to apply to as much as possible. */
65 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
69 if (MATCH (dfn_lbl, spec))
70 usage = DINFO_USAGE_DFN;
71 else if (MATCH (dir_lbl, spec))
72 usage = DINFO_USAGE_DIR_USE;
73 else if (MATCH (ind_lbl, spec))
74 usage = DINFO_USAGE_IND_USE;
76 /* Generics or not? */
77 if (MATCH (ord_lbl, spec))
79 else if (MATCH (gen_lbl, spec))
82 /* What allowable environment? */
83 if (MATCH (none_lbl, spec))
84 files = DINFO_STRUCT_FILE_NONE;
85 else if (MATCH (any_lbl, spec))
86 files = DINFO_STRUCT_FILE_ANY;
87 else if (MATCH (sys_lbl, spec))
88 files = DINFO_STRUCT_FILE_SYS;
89 else if (MATCH (base_lbl, spec))
90 files = DINFO_STRUCT_FILE_BASE;
93 "argument %qs to %<-femit-struct-debug-detailed%> "
97 /* Effect the specification. */
98 if (usage == DINFO_USAGE_NUM_ENUMS)
102 opts->x_debug_struct_ordinary[DINFO_USAGE_DFN] = files;
103 opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
104 opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
108 opts->x_debug_struct_generic[DINFO_USAGE_DFN] = files;
109 opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
110 opts->x_debug_struct_generic[DINFO_USAGE_IND_USE] = files;
116 opts->x_debug_struct_ordinary[usage] = files;
118 opts->x_debug_struct_generic[usage] = files;
122 set_struct_debug_option (opts, loc, spec+1);
125 /* No more -femit-struct-debug-detailed specifications.
129 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
131 if (opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE]
132 < opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE]
133 || opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE]
134 < opts->x_debug_struct_generic[DINFO_USAGE_IND_USE])
136 "%<-femit-struct-debug-detailed=dir:...%> must allow "
137 "at least as much as "
138 "%<-femit-struct-debug-detailed=ind:...%>");
142 /* Strip off a legitimate source ending from the input string NAME of
143 length LEN. Rather than having to know the names used by all of
144 our front ends, we strip off an ending of a period followed by
145 up to five characters. (Java uses ".class".) */
148 strip_off_ending (char *name, int len)
151 for (i = 2; i < 6 && len > i; i++)
153 if (name[len - i] == '.')
155 name[len - i] = '\0';
161 /* Find the base name of a path, stripping off both directories and
162 a single final extension. */
164 base_of_path (const char *path, const char **base_out)
166 const char *base = path;
168 const char *p = path;
172 if (IS_DIR_SEPARATOR (c))
187 /* What to print when a switch has no documentation. */
188 static const char undocumented_msg[] = N_("This switch lacks documentation");
190 typedef char *char_p; /* For DEF_VEC_P. */
192 static void handle_param (struct gcc_options *opts,
193 struct gcc_options *opts_set, location_t loc,
195 static void set_debug_level (enum debug_info_type type, int extended,
196 const char *arg, struct gcc_options *opts,
197 struct gcc_options *opts_set,
199 static void set_fast_math_flags (struct gcc_options *opts, int set);
200 static void decode_d_option (const char *arg, struct gcc_options *opts,
201 location_t loc, diagnostic_context *dc);
202 static void set_unsafe_math_optimizations_flags (struct gcc_options *opts,
204 static void enable_warning_as_error (const char *arg, int value,
205 unsigned int lang_mask,
206 const struct cl_option_handlers *handlers,
207 struct gcc_options *opts,
208 struct gcc_options *opts_set,
210 diagnostic_context *dc);
212 /* Handle a back-end option; arguments and return value as for
216 target_handle_option (struct gcc_options *opts,
217 struct gcc_options *opts_set,
218 const struct cl_decoded_option *decoded,
219 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
221 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
222 diagnostic_context *dc)
224 gcc_assert (dc == global_dc);
225 gcc_assert (kind == DK_UNSPECIFIED);
226 return targetm_common.handle_option (opts, opts_set, decoded, loc);
229 /* Add comma-separated strings to a char_p vector. */
232 add_comma_separated_to_vector (void **pvec, const char *arg)
238 vec<char_p> *v = (vec<char_p> *) *pvec;
240 vec_check_alloc (v, 1);
242 /* We never free this string. */
255 v->safe_push (token_start);
258 if (*r == '\\' && r[1] == ',')
266 if (*token_start != '\0')
267 v->safe_push (token_start);
272 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
275 init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set)
277 size_t num_params = get_num_compiler_params ();
279 gcc_obstack_init (&opts_obstack);
281 *opts = global_options_init;
284 memset (opts_set, 0, sizeof (*opts_set));
286 opts->x_param_values = XNEWVEC (int, num_params);
289 opts_set->x_param_values = XCNEWVEC (int, num_params);
291 init_param_values (opts->x_param_values);
293 /* Initialize whether `char' is signed. */
294 opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR;
295 /* Set this to a special "uninitialized" value. The actual default
296 is set after target options have been processed. */
297 opts->x_flag_short_enums = 2;
299 /* Initialize target_flags before default_options_optimization
300 so the latter can modify it. */
301 opts->x_target_flags = targetm_common.default_target_flags;
303 /* Some targets have ABI-specified unwind tables. */
304 opts->x_flag_unwind_tables = targetm_common.unwind_tables_default;
306 /* Some targets have other target-specific initialization. */
307 targetm_common.option_init_struct (opts);
310 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
311 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
312 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
313 mask LANG_MASK and option handlers HANDLERS. */
316 maybe_default_option (struct gcc_options *opts,
317 struct gcc_options *opts_set,
318 const struct default_options *default_opt,
319 int level, bool size, bool fast, bool debug,
320 unsigned int lang_mask,
321 const struct cl_option_handlers *handlers,
323 diagnostic_context *dc)
325 const struct cl_option *option = &cl_options[default_opt->opt_index];
329 gcc_assert (level == 2);
331 gcc_assert (level == 3);
333 gcc_assert (level == 1);
335 switch (default_opt->levels)
341 case OPT_LEVELS_0_ONLY:
342 enabled = (level == 0);
345 case OPT_LEVELS_1_PLUS:
346 enabled = (level >= 1);
349 case OPT_LEVELS_1_PLUS_SPEED_ONLY:
350 enabled = (level >= 1 && !size && !debug);
353 case OPT_LEVELS_1_PLUS_NOT_DEBUG:
354 enabled = (level >= 1 && !debug);
357 case OPT_LEVELS_2_PLUS:
358 enabled = (level >= 2);
361 case OPT_LEVELS_2_PLUS_SPEED_ONLY:
362 enabled = (level >= 2 && !size && !debug);
365 case OPT_LEVELS_3_PLUS:
366 enabled = (level >= 3);
369 case OPT_LEVELS_3_PLUS_AND_SIZE:
370 enabled = (level >= 3 || size);
373 case OPT_LEVELS_SIZE:
377 case OPT_LEVELS_FAST:
381 case OPT_LEVELS_NONE:
387 handle_generated_option (opts, opts_set, default_opt->opt_index,
388 default_opt->arg, default_opt->value,
389 lang_mask, DK_UNSPECIFIED, loc,
391 else if (default_opt->arg == NULL
392 && !option->cl_reject_negative)
393 handle_generated_option (opts, opts_set, default_opt->opt_index,
394 default_opt->arg, !default_opt->value,
395 lang_mask, DK_UNSPECIFIED, loc,
399 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
400 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
401 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
402 language mask LANG_MASK and option handlers HANDLERS. */
405 maybe_default_options (struct gcc_options *opts,
406 struct gcc_options *opts_set,
407 const struct default_options *default_opts,
408 int level, bool size, bool fast, bool debug,
409 unsigned int lang_mask,
410 const struct cl_option_handlers *handlers,
412 diagnostic_context *dc)
416 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++)
417 maybe_default_option (opts, opts_set, &default_opts[i],
418 level, size, fast, debug,
419 lang_mask, handlers, loc, dc);
422 /* Table of options enabled by default at different levels. */
424 static const struct default_options default_options_table[] =
426 /* -O1 optimizations. */
427 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
429 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 },
431 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
432 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
433 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
434 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 },
435 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 },
436 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
437 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
438 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
439 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
440 { OPT_LEVELS_1_PLUS, OPT_fshrink_wrap, NULL, 1 },
441 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
442 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
443 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 },
444 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
445 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
446 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
447 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
448 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_sra, NULL, 1 },
449 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 },
450 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
451 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
452 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
453 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
454 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
455 { OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
456 { OPT_LEVELS_1_PLUS, OPT_ftree_slsr, NULL, 1 },
457 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fbranch_count_reg, NULL, 1 },
458 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_fmove_loop_invariants, NULL, 1 },
459 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_pta, NULL, 1 },
461 /* -O2 optimizations. */
462 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
463 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
464 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
465 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
466 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
467 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
468 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
469 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
470 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
471 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
472 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
473 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
474 #ifdef INSN_SCHEDULING
475 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
476 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
477 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
479 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
480 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
481 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
482 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
483 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
484 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
485 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
486 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
487 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
488 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
489 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize_speculatively, NULL, 1 },
490 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
491 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 },
492 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 },
493 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 },
494 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 },
495 { OPT_LEVELS_2_PLUS, OPT_ftree_tail_merge, NULL, 1 },
496 { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
497 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_foptimize_strlen, NULL, 1 },
498 { OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 },
499 { OPT_LEVELS_2_PLUS, OPT_fisolate_erroneous_paths_dereference, NULL, 1 },
501 /* -O3 optimizations. */
502 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
503 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
504 /* Inlining of functions reducing size is a good idea with -Os
505 regardless of them being declared inline. */
506 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
507 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_finline_functions_called_once, NULL, 1 },
508 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
509 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
510 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_vectorize, NULL, 1 },
511 { OPT_LEVELS_3_PLUS, OPT_ftree_slp_vectorize, NULL, 1 },
512 { OPT_LEVELS_3_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_DYNAMIC },
513 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
514 { OPT_LEVELS_3_PLUS, OPT_ftree_partial_pre, NULL, 1 },
516 /* -Ofast adds optimizations to -O3. */
517 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
519 { OPT_LEVELS_NONE, 0, NULL, 0 }
522 /* Default the options in OPTS and OPTS_SET based on the optimization
523 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
525 default_options_optimization (struct gcc_options *opts,
526 struct gcc_options *opts_set,
527 struct cl_decoded_option *decoded_options,
528 unsigned int decoded_options_count,
530 unsigned int lang_mask,
531 const struct cl_option_handlers *handlers,
532 diagnostic_context *dc)
537 /* Scan to see what optimization level has been specified. That will
538 determine the default value of many flags. */
539 for (i = 1; i < decoded_options_count; i++)
541 struct cl_decoded_option *opt = &decoded_options[i];
542 switch (opt->opt_index)
545 if (*opt->arg == '\0')
547 opts->x_optimize = 1;
548 opts->x_optimize_size = 0;
549 opts->x_optimize_fast = 0;
550 opts->x_optimize_debug = 0;
554 const int optimize_val = integral_argument (opt->arg);
555 if (optimize_val == -1)
556 error_at (loc, "argument to %<-O%> should be a non-negative "
557 "integer, %<g%>, %<s%> or %<fast%>");
560 opts->x_optimize = optimize_val;
561 if ((unsigned int) opts->x_optimize > 255)
562 opts->x_optimize = 255;
563 opts->x_optimize_size = 0;
564 opts->x_optimize_fast = 0;
565 opts->x_optimize_debug = 0;
571 opts->x_optimize_size = 1;
573 /* Optimizing for size forces optimize to be 2. */
574 opts->x_optimize = 2;
575 opts->x_optimize_fast = 0;
576 opts->x_optimize_debug = 0;
580 /* -Ofast only adds flags to -O3. */
581 opts->x_optimize_size = 0;
582 opts->x_optimize = 3;
583 opts->x_optimize_fast = 1;
584 opts->x_optimize_debug = 0;
588 /* -Og selects optimization level 1. */
589 opts->x_optimize_size = 0;
590 opts->x_optimize = 1;
591 opts->x_optimize_fast = 0;
592 opts->x_optimize_debug = 1;
596 /* Ignore other options in this prescan. */
601 maybe_default_options (opts, opts_set, default_options_table,
602 opts->x_optimize, opts->x_optimize_size,
603 opts->x_optimize_fast, opts->x_optimize_debug,
604 lang_mask, handlers, loc, dc);
606 /* -O2 param settings. */
607 opt2 = (opts->x_optimize >= 2);
609 /* Track fields in field-sensitive alias analysis. */
610 maybe_set_param_value
611 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
612 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE),
613 opts->x_param_values, opts_set->x_param_values);
615 /* For -O1 only do loop invariant motion for very small loops. */
616 maybe_set_param_value
617 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
618 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000,
619 opts->x_param_values, opts_set->x_param_values);
621 if (opts->x_optimize_size)
622 /* We want to crossjump as much as possible. */
623 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1,
624 opts->x_param_values, opts_set->x_param_values);
626 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS,
627 default_param_value (PARAM_MIN_CROSSJUMP_INSNS),
628 opts->x_param_values, opts_set->x_param_values);
630 /* Allow default optimizations to be specified on a per-machine basis. */
631 maybe_default_options (opts, opts_set,
632 targetm_common.option_optimization_table,
633 opts->x_optimize, opts->x_optimize_size,
634 opts->x_optimize_fast, opts->x_optimize_debug,
635 lang_mask, handlers, loc, dc);
638 /* After all options at LOC have been read into OPTS and OPTS_SET,
639 finalize settings of those options and diagnose incompatible
642 finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
645 enum unwind_info_type ui_except;
647 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name))
649 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
650 OPTS->X_DUMP_DIR_NAME directory. Then try to make
651 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
652 directory, typically the directory to contain the object
654 if (opts->x_dump_dir_name)
655 opts->x_dump_base_name = opts_concat (opts->x_dump_dir_name,
656 opts->x_dump_base_name, NULL);
657 else if (opts->x_aux_base_name
658 && strcmp (opts->x_aux_base_name, HOST_BIT_BUCKET) != 0)
660 const char *aux_base;
662 base_of_path (opts->x_aux_base_name, &aux_base);
663 if (opts->x_aux_base_name != aux_base)
665 int dir_len = aux_base - opts->x_aux_base_name;
666 char *new_dump_base_name
667 = XOBNEWVEC (&opts_obstack, char,
668 strlen (opts->x_dump_base_name) + dir_len + 1);
670 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
671 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len);
672 /* Append existing OPTS->X_DUMP_BASE_NAME. */
673 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name);
674 opts->x_dump_base_name = new_dump_base_name;
679 /* Handle related options for unit-at-a-time, toplevel-reorder, and
681 if (!opts->x_flag_unit_at_a_time)
683 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
684 error_at (loc, "section anchors must be disabled when unit-at-a-time "
686 opts->x_flag_section_anchors = 0;
687 if (opts->x_flag_toplevel_reorder == 1)
688 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time "
690 opts->x_flag_toplevel_reorder = 0;
693 if (opts->x_flag_tm && opts->x_flag_non_call_exceptions)
694 sorry ("transactional memory is not supported with non-call exceptions");
696 /* Unless the user has asked for section anchors, we disable toplevel
697 reordering at -O0 to disable transformations that might be surprising
698 to end users and to get -fno-toplevel-reorder tested. */
699 if (!opts->x_optimize
700 && opts->x_flag_toplevel_reorder == 2
701 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors))
703 opts->x_flag_toplevel_reorder = 0;
704 opts->x_flag_section_anchors = 0;
706 if (!opts->x_flag_toplevel_reorder)
708 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
709 error_at (loc, "section anchors must be disabled when toplevel reorder"
711 opts->x_flag_section_anchors = 0;
714 if (!opts->x_flag_opts_finished)
716 if (opts->x_flag_pie)
717 opts->x_flag_pic = opts->x_flag_pie;
718 if (opts->x_flag_pic && !opts->x_flag_pie)
719 opts->x_flag_shlib = 1;
720 opts->x_flag_opts_finished = true;
723 if (opts->x_optimize == 0)
725 /* Inlining does not work if not optimizing,
726 so force it not to be done. */
727 opts->x_warn_inline = 0;
728 opts->x_flag_no_inline = 1;
731 /* The optimization to partition hot and cold basic blocks into separate
732 sections of the .o and executable files does not work (currently)
733 with exception handling. This is because there is no support for
734 generating unwind info. If opts->x_flag_exceptions is turned on
735 we need to turn off the partitioning optimization. */
737 ui_except = targetm_common.except_unwind_info (opts);
739 if (opts->x_flag_exceptions
740 && opts->x_flag_reorder_blocks_and_partition
741 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))
743 if (opts_set->x_flag_reorder_blocks_and_partition)
745 "-freorder-blocks-and-partition does not work "
746 "with exceptions on this architecture");
747 opts->x_flag_reorder_blocks_and_partition = 0;
748 opts->x_flag_reorder_blocks = 1;
751 /* If user requested unwind info, then turn off the partitioning
754 if (opts->x_flag_unwind_tables
755 && !targetm_common.unwind_tables_default
756 && opts->x_flag_reorder_blocks_and_partition
757 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))
759 if (opts_set->x_flag_reorder_blocks_and_partition)
761 "-freorder-blocks-and-partition does not support "
762 "unwind info on this architecture");
763 opts->x_flag_reorder_blocks_and_partition = 0;
764 opts->x_flag_reorder_blocks = 1;
767 /* If the target requested unwind info, then turn off the partitioning
768 optimization with a different message. Likewise, if the target does not
769 support named sections. */
771 if (opts->x_flag_reorder_blocks_and_partition
772 && (!targetm_common.have_named_sections
773 || (opts->x_flag_unwind_tables
774 && targetm_common.unwind_tables_default
775 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))))
777 if (opts_set->x_flag_reorder_blocks_and_partition)
779 "-freorder-blocks-and-partition does not work "
780 "on this architecture");
781 opts->x_flag_reorder_blocks_and_partition = 0;
782 opts->x_flag_reorder_blocks = 1;
785 if (opts->x_flag_reorder_blocks_and_partition
786 && !opts_set->x_flag_reorder_functions)
787 opts->x_flag_reorder_functions = 1;
789 /* Pipelining of outer loops is only possible when general pipelining
790 capabilities are requested. */
791 if (!opts->x_flag_sel_sched_pipelining)
792 opts->x_flag_sel_sched_pipelining_outer_loops = 0;
794 if (opts->x_flag_conserve_stack)
796 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100,
797 opts->x_param_values, opts_set->x_param_values);
798 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40,
799 opts->x_param_values, opts_set->x_param_values);
802 if (opts->x_flag_lto)
805 opts->x_flag_generate_lto = 1;
807 /* When generating IL, do not operate in whole-program mode.
808 Otherwise, symbols will be privatized too early, causing link
810 opts->x_flag_whole_program = 0;
812 error_at (loc, "LTO support has not been enabled in this configuration");
814 if (!opts->x_flag_fat_lto_objects
816 || (opts_set->x_flag_use_linker_plugin
817 && !opts->x_flag_use_linker_plugin)))
819 if (opts_set->x_flag_fat_lto_objects)
820 error_at (loc, "-fno-fat-lto-objects are supported only with linker plugin");
821 opts->x_flag_fat_lto_objects = 1;
824 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
825 + (opts->x_flag_lto_partition_none != 0) >= 1)
827 if ((opts->x_flag_lto_partition_balanced != 0)
828 + (opts->x_flag_lto_partition_1to1 != 0)
829 + (opts->x_flag_lto_partition_none != 0) > 1)
830 error_at (loc, "only one -flto-partition value can be specified");
833 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
834 default value if they choose based on other options. */
835 if (opts->x_flag_split_stack == -1)
836 opts->x_flag_split_stack = 0;
837 else if (opts->x_flag_split_stack)
839 if (!targetm_common.supports_split_stack (true, opts))
841 error_at (loc, "%<-fsplit-stack%> is not supported by "
842 "this compiler configuration");
843 opts->x_flag_split_stack = 0;
847 /* Tune vectorization related parametees according to cost model. */
848 if (opts->x_flag_vect_cost_model == VECT_COST_MODEL_CHEAP)
850 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS,
851 6, opts->x_param_values, opts_set->x_param_values);
852 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS,
853 0, opts->x_param_values, opts_set->x_param_values);
854 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT,
855 0, opts->x_param_values, opts_set->x_param_values);
858 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
860 if ((!opts->x_flag_tree_loop_vectorize && !opts->x_flag_tree_slp_vectorize)
861 || !opts->x_flag_tree_loop_if_convert)
862 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK, 0,
863 opts->x_param_values, opts_set->x_param_values);
865 /* The -gsplit-dwarf option requires -gpubnames. */
866 if (opts->x_dwarf_split_debug_info)
867 opts->x_debug_generate_pub_sections = 1;
870 #define LEFT_COLUMN 27
872 /* Output ITEM, of length ITEM_WIDTH, in the left column,
873 followed by word-wrapped HELP in a second column. */
875 wrap_help (const char *help,
877 unsigned int item_width,
878 unsigned int columns)
880 unsigned int col_width = LEFT_COLUMN;
881 unsigned int remaining, room, len;
883 remaining = strlen (help);
887 room = columns - 3 - MAX (col_width, item_width);
896 for (i = 0; help[i]; i++)
898 if (i >= room && len != remaining)
902 else if ((help[i] == '-' || help[i] == '/')
903 && help[i + 1] != ' '
904 && i > 0 && ISALPHA (help[i - 1]))
909 printf (" %-*.*s %.*s\n", col_width, item_width, item, len, help);
911 while (help[len] == ' ')
919 /* Print help for a specific front-end, etc. */
921 print_filtered_help (unsigned int include_flags,
922 unsigned int exclude_flags,
923 unsigned int any_flags,
924 unsigned int columns,
925 struct gcc_options *opts,
926 unsigned int lang_mask)
931 bool displayed = false;
933 if (include_flags == CL_PARAMS)
935 for (i = 0; i < LAST_PARAM; i++)
937 const char *param = compiler_params[i].option;
939 help = compiler_params[i].help;
940 if (help == NULL || *help == '\0')
942 if (exclude_flags & CL_UNDOCUMENTED)
944 help = undocumented_msg;
947 /* Get the translation. */
950 wrap_help (help, param, strlen (param), columns);
956 if (!opts->x_help_printed)
957 opts->x_help_printed = XCNEWVAR (char, cl_options_count);
959 if (!opts->x_help_enum_printed)
960 opts->x_help_enum_printed = XCNEWVAR (char, cl_enums_count);
962 for (i = 0; i < cl_options_count; i++)
965 const struct cl_option *option = cl_options + i;
970 if (include_flags == 0
971 || ((option->flags & include_flags) != include_flags))
973 if ((option->flags & any_flags) == 0)
977 /* Skip unwanted switches. */
978 if ((option->flags & exclude_flags) != 0)
981 /* The driver currently prints its own help text. */
982 if ((option->flags & CL_DRIVER) != 0
983 && (option->flags & (((1U << cl_lang_count) - 1)
984 | CL_COMMON | CL_TARGET)) == 0)
988 /* Skip switches that have already been printed. */
989 if (opts->x_help_printed[i])
992 opts->x_help_printed[i] = true;
997 if (exclude_flags & CL_UNDOCUMENTED)
999 help = undocumented_msg;
1002 /* Get the translation. */
1005 /* Find the gap between the name of the
1006 option and its descriptive text. */
1007 tab = strchr (help, '\t');
1016 opt = option->opt_text;
1020 /* With the -Q option enabled we change the descriptive text associated
1021 with an option to be an indication of its current setting. */
1022 if (!opts->x_quiet_flag)
1024 void *flag_var = option_flag_var (i, opts);
1026 if (len < (LEFT_COLUMN + 2))
1027 strcpy (new_help, "\t\t");
1029 strcpy (new_help, "\t");
1031 if (flag_var != NULL
1032 && option->var_type != CLVC_DEFER)
1034 if (option->flags & CL_JOINED)
1036 if (option->var_type == CLVC_STRING)
1038 if (* (const char **) flag_var != NULL)
1039 snprintf (new_help + strlen (new_help),
1040 sizeof (new_help) - strlen (new_help),
1041 * (const char **) flag_var);
1043 else if (option->var_type == CLVC_ENUM)
1045 const struct cl_enum *e = &cl_enums[option->var_enum];
1047 const char *arg = NULL;
1049 value = e->get (flag_var);
1050 enum_value_to_arg (e->values, &arg, value, lang_mask);
1052 arg = _("[default]");
1053 snprintf (new_help + strlen (new_help),
1054 sizeof (new_help) - strlen (new_help),
1058 sprintf (new_help + strlen (new_help),
1059 "%#x", * (int *) flag_var);
1062 strcat (new_help, option_enabled (i, opts)
1063 ? _("[enabled]") : _("[disabled]"));
1069 wrap_help (help, opt, len, columns);
1072 if (option->var_type == CLVC_ENUM
1073 && opts->x_help_enum_printed[option->var_enum] != 2)
1074 opts->x_help_enum_printed[option->var_enum] = 1;
1079 unsigned int langs = include_flags & CL_LANG_ALL;
1082 printf (_(" No options with the desired characteristics were found\n"));
1087 /* PR 31349: Tell the user how to see all of the
1088 options supported by a specific front end. */
1089 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1090 if ((1U << i) & langs)
1091 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1092 lang_names[i], lang_names[i]);
1096 else if (! displayed)
1097 printf (_(" All options with the desired characteristics have already been displayed\n"));
1101 /* Print details of enumerated option arguments, if those
1102 enumerations have help text headings provided. If no help text
1103 is provided, presume that the possible values are listed in the
1104 help text for the relevant options. */
1105 for (i = 0; i < cl_enums_count; i++)
1107 unsigned int j, pos;
1109 if (opts->x_help_enum_printed[i] != 1)
1111 if (cl_enums[i].help == NULL)
1113 printf (" %s\n ", _(cl_enums[i].help));
1115 for (j = 0; cl_enums[i].values[j].arg != NULL; j++)
1117 unsigned int len = strlen (cl_enums[i].values[j].arg);
1119 if (pos > 4 && pos + 1 + len <= columns)
1121 printf (" %s", cl_enums[i].values[j].arg);
1131 printf ("%s", cl_enums[i].values[j].arg);
1136 opts->x_help_enum_printed[i] = 2;
1140 /* Display help for a specified type of option.
1141 The options must have ALL of the INCLUDE_FLAGS set
1142 ANY of the flags in the ANY_FLAGS set
1143 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1144 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1146 print_specific_help (unsigned int include_flags,
1147 unsigned int exclude_flags,
1148 unsigned int any_flags,
1149 struct gcc_options *opts,
1150 unsigned int lang_mask)
1152 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1153 const char * description = NULL;
1154 const char * descrip_extra = "";
1158 /* Sanity check: Make sure that we do not have more
1159 languages than we have bits available to enumerate them. */
1160 gcc_assert ((1U << cl_lang_count) <= CL_MIN_OPTION_CLASS);
1162 /* If we have not done so already, obtain
1163 the desired maximum width of the output. */
1164 if (opts->x_help_columns == 0)
1168 p = getenv ("COLUMNS");
1171 int value = atoi (p);
1174 opts->x_help_columns = value;
1177 if (opts->x_help_columns == 0)
1178 /* Use a reasonable default. */
1179 opts->x_help_columns = 80;
1182 /* Decide upon the title for the options that we are going to display. */
1183 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1185 switch (flag & include_flags)
1192 description = _("The following options are target specific");
1195 description = _("The following options control compiler warning messages");
1197 case CL_OPTIMIZATION:
1198 description = _("The following options control optimizations");
1201 description = _("The following options are language-independent");
1204 description = _("The --param option recognizes the following as parameters");
1207 if (i >= cl_lang_count)
1209 if (exclude_flags & all_langs_mask)
1210 description = _("The following options are specific to just the language ");
1212 description = _("The following options are supported by the language ");
1213 descrip_extra = lang_names [i];
1218 if (description == NULL)
1222 if (include_flags & CL_UNDOCUMENTED)
1223 description = _("The following options are not documented");
1224 else if (include_flags & CL_SEPARATE)
1225 description = _("The following options take separate arguments");
1226 else if (include_flags & CL_JOINED)
1227 description = _("The following options take joined arguments");
1230 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1237 if (any_flags & all_langs_mask)
1238 description = _("The following options are language-related");
1240 description = _("The following options are language-independent");
1244 printf ("%s%s:\n", description, descrip_extra);
1245 print_filtered_help (include_flags, exclude_flags, any_flags,
1246 opts->x_help_columns, opts, lang_mask);
1249 /* Handle target- and language-independent options. Return zero to
1250 generate an "unknown option" message. Only options that need
1251 extra handling need to be listed here; if you simply want
1252 DECODED->value assigned to a variable, it happens automatically. */
1255 common_handle_option (struct gcc_options *opts,
1256 struct gcc_options *opts_set,
1257 const struct cl_decoded_option *decoded,
1258 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1260 const struct cl_option_handlers *handlers,
1261 diagnostic_context *dc)
1263 size_t scode = decoded->opt_index;
1264 const char *arg = decoded->arg;
1265 int value = decoded->value;
1266 enum opt_code code = (enum opt_code) scode;
1268 gcc_assert (decoded->canonical_option_num_elements <= 2);
1273 handle_param (opts, opts_set, loc, arg);
1278 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1279 unsigned int undoc_mask;
1282 if (lang_mask == CL_DRIVER)
1285 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings)
1288 /* First display any single language specific options. */
1289 for (i = 0; i < cl_lang_count; i++)
1291 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts,
1293 /* Next display any multi language specific options. */
1294 print_specific_help (0, undoc_mask, all_langs_mask, opts, lang_mask);
1295 /* Then display any remaining, non-language options. */
1296 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1298 print_specific_help (i, undoc_mask, 0, opts, lang_mask);
1299 opts->x_exit_after_options = true;
1303 case OPT__target_help:
1304 if (lang_mask == CL_DRIVER)
1307 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts, lang_mask);
1308 opts->x_exit_after_options = true;
1313 const char * a = arg;
1314 unsigned int include_flags = 0;
1315 /* Note - by default we include undocumented options when listing
1316 specific classes. If you only want to see documented options
1317 then add ",^undocumented" to the --help= option. E.g.:
1319 --help=target,^undocumented */
1320 unsigned int exclude_flags = 0;
1322 if (lang_mask == CL_DRIVER)
1325 /* Walk along the argument string, parsing each word in turn.
1327 arg = [^]{word}[,{arg}]
1328 word = {optimizers|target|warnings|undocumented|
1329 params|common|<language>} */
1334 const char * string;
1339 { "optimizers", CL_OPTIMIZATION },
1340 { "target", CL_TARGET },
1341 { "warnings", CL_WARNING },
1342 { "undocumented", CL_UNDOCUMENTED },
1343 { "params", CL_PARAMS },
1344 { "joined", CL_JOINED },
1345 { "separate", CL_SEPARATE },
1346 { "common", CL_COMMON },
1349 unsigned int * pflags;
1351 unsigned int lang_flag, specific_flag;
1358 pflags = & exclude_flags;
1361 pflags = & include_flags;
1363 comma = strchr (a, ',');
1374 /* Check to see if the string matches an option class name. */
1375 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1376 if (strncasecmp (a, specifics[i].string, len) == 0)
1378 specific_flag = specifics[i].flag;
1382 /* Check to see if the string matches a language name.
1383 Note - we rely upon the alpha-sorted nature of the entries in
1384 the lang_names array, specifically that shorter names appear
1385 before their longer variants. (i.e. C before C++). That way
1386 when we are attempting to match --help=c for example we will
1387 match with C first and not C++. */
1388 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1389 if (strncasecmp (a, lang_names[i], len) == 0)
1391 lang_flag = 1U << i;
1395 if (specific_flag != 0)
1398 * pflags |= specific_flag;
1401 /* The option's argument matches both the start of a
1402 language name and the start of an option class name.
1403 We have a special case for when the user has
1404 specified "--help=c", but otherwise we have to issue
1406 if (strncasecmp (a, "c", len) == 0)
1407 * pflags |= lang_flag;
1410 "--help argument %q.*s is ambiguous, "
1411 "please be more specific",
1415 else if (lang_flag != 0)
1416 * pflags |= lang_flag;
1419 "unrecognized argument to --help= option: %q.*s",
1428 print_specific_help (include_flags, exclude_flags, 0, opts,
1430 opts->x_exit_after_options = true;
1435 if (lang_mask == CL_DRIVER)
1438 opts->x_exit_after_options = true;
1441 case OPT_fsanitize_:
1443 const char *p = arg;
1448 const char *const name;
1453 { "address", SANITIZE_ADDRESS, sizeof "address" - 1 },
1454 { "thread", SANITIZE_THREAD, sizeof "thread" - 1 },
1455 { "leak", SANITIZE_LEAK, sizeof "leak" - 1 },
1456 { "shift", SANITIZE_SHIFT, sizeof "shift" - 1 },
1457 { "integer-divide-by-zero", SANITIZE_DIVIDE,
1458 sizeof "integer-divide-by-zero" - 1 },
1459 { "undefined", SANITIZE_UNDEFINED, sizeof "undefined" - 1 },
1460 { "unreachable", SANITIZE_UNREACHABLE,
1461 sizeof "unreachable" - 1 },
1462 { "vla-bound", SANITIZE_VLA, sizeof "vla-bound" - 1 },
1463 { "return", SANITIZE_RETURN, sizeof "return" - 1 },
1464 { "null", SANITIZE_NULL, sizeof "null" - 1 },
1465 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW,
1466 sizeof "signed-integer-overflow" -1 },
1467 { "bool", SANITIZE_BOOL, sizeof "bool" - 1 },
1468 { "enum", SANITIZE_ENUM, sizeof "enum" - 1 },
1475 comma = strchr (p, ',');
1486 /* Check to see if the string matches an option class name. */
1487 for (i = 0; spec[i].name != NULL; ++i)
1488 if (len == spec[i].len
1489 && memcmp (p, spec[i].name, len) == 0)
1491 /* Handle both -fsanitize and -fno-sanitize cases. */
1493 flag_sanitize |= spec[i].flag;
1495 flag_sanitize &= ~spec[i].flag;
1502 "unrecognized argument to -fsanitize= option: %q.*s",
1510 /* When instrumenting the pointers, we don't want to remove
1511 the null pointer checks. */
1512 if (flag_sanitize & SANITIZE_NULL)
1513 opts->x_flag_delete_null_pointer_checks = 0;
1521 /* Currently handled in a prescan. */
1525 dc->warning_as_error_requested = value;
1529 if (lang_mask == CL_DRIVER)
1532 enable_warning_as_error (arg, value, lang_mask, handlers,
1533 opts, opts_set, loc, dc);
1536 case OPT_Wlarger_than_:
1537 opts->x_larger_than_size = value;
1538 opts->x_warn_larger_than = value != -1;
1541 case OPT_Wfatal_errors:
1542 dc->fatal_errors = value;
1545 case OPT_Wframe_larger_than_:
1546 opts->x_frame_larger_than_size = value;
1547 opts->x_warn_frame_larger_than = value != -1;
1550 case OPT_Wstack_usage_:
1551 opts->x_warn_stack_usage = value;
1552 opts->x_flag_stack_usage_info = value != -1;
1555 case OPT_Wstrict_aliasing:
1556 set_Wstrict_aliasing (opts, value);
1559 case OPT_Wstrict_overflow:
1560 opts->x_warn_strict_overflow = (value
1561 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1565 case OPT_Wsystem_headers:
1566 dc->dc_warn_system_headers = value;
1570 opts->x_flag_gen_aux_info = 1;
1573 case OPT_auxbase_strip:
1575 char *tmp = xstrdup (arg);
1576 strip_off_ending (tmp, strlen (tmp));
1578 opts->x_aux_base_name = tmp;
1585 decode_d_option (arg, opts, loc, dc);
1588 case OPT_fcall_used_:
1589 case OPT_fcall_saved_:
1594 case OPT_fdbg_cnt_list:
1598 case OPT_fdebug_prefix_map_:
1602 case OPT_fdiagnostics_show_location_:
1603 diagnostic_prefixing_rule (dc) = (diagnostic_prefixing_rule_t) value;
1606 case OPT_fdiagnostics_show_caret:
1607 dc->show_caret = value;
1610 case OPT_fdiagnostics_color_:
1611 pp_show_color (dc->printer)
1612 = colorize_init ((diagnostic_color_rule_t) value);
1615 case OPT_fdiagnostics_show_option:
1616 dc->show_option_requested = value;
1623 case OPT_ffast_math:
1624 set_fast_math_flags (opts, value);
1627 case OPT_funsafe_math_optimizations:
1628 set_unsafe_math_optimizations_flags (opts, value);
1635 case OPT_finline_limit_:
1636 set_param_value ("max-inline-insns-single", value / 2,
1637 opts->x_param_values, opts_set->x_param_values);
1638 set_param_value ("max-inline-insns-auto", value / 2,
1639 opts->x_param_values, opts_set->x_param_values);
1642 case OPT_finstrument_functions_exclude_function_list_:
1643 add_comma_separated_to_vector
1644 (&opts->x_flag_instrument_functions_exclude_functions, arg);
1647 case OPT_finstrument_functions_exclude_file_list_:
1648 add_comma_separated_to_vector
1649 (&opts->x_flag_instrument_functions_exclude_files, arg);
1652 case OPT_fmessage_length_:
1653 pp_set_line_maximum_length (dc->printer, value);
1654 diagnostic_set_caret_max_width (dc, value);
1658 case OPT_fopt_info_:
1662 case OPT_fpack_struct_:
1663 if (value <= 0 || (value & (value - 1)) || value > 16)
1665 "structure alignment must be a small power of two, not %d",
1668 opts->x_initial_max_fld_align = value;
1672 case OPT_fplugin_arg_:
1676 case OPT_fprofile_use_:
1677 opts->x_profile_data_prefix = xstrdup (arg);
1678 opts->x_flag_profile_use = true;
1680 /* No break here - do -fprofile-use processing. */
1681 case OPT_fprofile_use:
1682 if (!opts_set->x_flag_branch_probabilities)
1683 opts->x_flag_branch_probabilities = value;
1684 if (!opts_set->x_flag_profile_values)
1685 opts->x_flag_profile_values = value;
1686 if (!opts_set->x_flag_unroll_loops)
1687 opts->x_flag_unroll_loops = value;
1688 if (!opts_set->x_flag_peel_loops)
1689 opts->x_flag_peel_loops = value;
1690 if (!opts_set->x_flag_tracer)
1691 opts->x_flag_tracer = value;
1692 if (!opts_set->x_flag_value_profile_transformations)
1693 opts->x_flag_value_profile_transformations = value;
1694 if (!opts_set->x_flag_inline_functions)
1695 opts->x_flag_inline_functions = value;
1696 if (!opts_set->x_flag_ipa_cp)
1697 opts->x_flag_ipa_cp = value;
1698 if (!opts_set->x_flag_ipa_cp_clone
1699 && value && opts->x_flag_ipa_cp)
1700 opts->x_flag_ipa_cp_clone = value;
1701 if (!opts_set->x_flag_predictive_commoning)
1702 opts->x_flag_predictive_commoning = value;
1703 if (!opts_set->x_flag_unswitch_loops)
1704 opts->x_flag_unswitch_loops = value;
1705 if (!opts_set->x_flag_gcse_after_reload)
1706 opts->x_flag_gcse_after_reload = value;
1707 if (!opts_set->x_flag_tree_loop_vectorize
1708 && !opts_set->x_flag_tree_vectorize)
1709 opts->x_flag_tree_loop_vectorize = value;
1710 if (!opts_set->x_flag_tree_slp_vectorize
1711 && !opts_set->x_flag_tree_vectorize)
1712 opts->x_flag_tree_slp_vectorize = value;
1713 if (!opts_set->x_flag_vect_cost_model)
1714 opts->x_flag_vect_cost_model = VECT_COST_MODEL_DYNAMIC;
1715 if (!opts_set->x_flag_tree_loop_distribute_patterns)
1716 opts->x_flag_tree_loop_distribute_patterns = value;
1717 if (!opts_set->x_flag_profile_reorder_functions)
1718 opts->x_flag_profile_reorder_functions = value;
1719 /* Indirect call profiling should do all useful transformations
1720 speculative devirtualization does. */
1721 if (!opts_set->x_flag_devirtualize_speculatively
1722 && opts->x_flag_value_profile_transformations)
1723 opts->x_flag_devirtualize_speculatively = false;
1726 case OPT_fprofile_generate_:
1727 opts->x_profile_data_prefix = xstrdup (arg);
1729 /* No break here - do -fprofile-generate processing. */
1730 case OPT_fprofile_generate:
1731 if (!opts_set->x_profile_arc_flag)
1732 opts->x_profile_arc_flag = value;
1733 if (!opts_set->x_flag_profile_values)
1734 opts->x_flag_profile_values = value;
1735 if (!opts_set->x_flag_inline_functions)
1736 opts->x_flag_inline_functions = value;
1737 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1738 quadratic. Disable the pass until better memory representation
1740 if (!opts_set->x_flag_ipa_reference && opts->x_in_lto_p)
1741 opts->x_flag_ipa_reference = false;
1744 case OPT_ftree_vectorize:
1745 if (!opts_set->x_flag_tree_loop_vectorize)
1746 opts->x_flag_tree_loop_vectorize = value;
1747 if (!opts_set->x_flag_tree_slp_vectorize)
1748 opts->x_flag_tree_slp_vectorize = value;
1750 case OPT_fshow_column:
1751 dc->show_column = value;
1754 case OPT_frandom_seed:
1755 /* The real switch is -fno-random-seed. */
1761 case OPT_frandom_seed_:
1765 case OPT_fsched_verbose_:
1766 #ifdef INSN_SCHEDULING
1767 /* Handled with Var in common.opt. */
1773 case OPT_fsched_stalled_insns_:
1774 opts->x_flag_sched_stalled_insns = value;
1775 if (opts->x_flag_sched_stalled_insns == 0)
1776 opts->x_flag_sched_stalled_insns = -1;
1779 case OPT_fsched_stalled_insns_dep_:
1780 opts->x_flag_sched_stalled_insns_dep = value;
1783 case OPT_fstack_check_:
1784 if (!strcmp (arg, "no"))
1785 opts->x_flag_stack_check = NO_STACK_CHECK;
1786 else if (!strcmp (arg, "generic"))
1787 /* This is the old stack checking method. */
1788 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1789 ? FULL_BUILTIN_STACK_CHECK
1790 : GENERIC_STACK_CHECK;
1791 else if (!strcmp (arg, "specific"))
1792 /* This is the new stack checking method. */
1793 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1794 ? FULL_BUILTIN_STACK_CHECK
1795 : STACK_CHECK_STATIC_BUILTIN
1796 ? STATIC_BUILTIN_STACK_CHECK
1797 : GENERIC_STACK_CHECK;
1799 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg);
1802 case OPT_fstack_limit:
1803 /* The real switch is -fno-stack-limit. */
1809 case OPT_fstack_limit_register_:
1810 case OPT_fstack_limit_symbol_:
1814 case OPT_fstack_usage:
1815 opts->x_flag_stack_usage = value;
1816 opts->x_flag_stack_usage_info = value != 0;
1820 /* -g by itself should force -g2. */
1822 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, "2", opts, opts_set,
1825 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set,
1830 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
1834 if (arg && strlen (arg) != 0)
1836 error_at (loc, "%<-gdwarf%s%> is ambiguous; "
1837 "use %<-gdwarf-%s%> for DWARF version "
1838 "or %<-gdwarf -g%s%> for debug level", arg, arg, arg);
1842 value = opts->x_dwarf_version;
1846 if (value < 2 || value > 4)
1847 error_at (loc, "dwarf version %d is not supported", value);
1849 opts->x_dwarf_version = value;
1850 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc);
1853 case OPT_gsplit_dwarf:
1854 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, "", opts, opts_set,
1859 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
1864 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,
1869 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc);
1874 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set,
1878 case OPT_pedantic_errors:
1879 dc->pedantic_errors = 1;
1880 control_warning_option (OPT_Wpedantic, DK_ERROR, value,
1882 handlers, opts, opts_set,
1887 opts->x_flag_lto = value ? "" : NULL;
1891 dc->dc_inhibit_warnings = true;
1894 case OPT_fmax_errors_:
1895 dc->max_errors = value;
1898 case OPT_fuse_ld_bfd:
1899 case OPT_fuse_ld_gold:
1900 case OPT_fuse_linker_plugin:
1901 /* No-op. Used by the driver and passed to us because it starts with f.*/
1906 opts->x_flag_trapv = 0;
1911 opts->x_flag_wrapv = 0;
1915 /* If the flag was handled in a standard way, assume the lack of
1916 processing here is intentional. */
1917 gcc_assert (option_flag_var (scode, opts));
1921 common_handle_option_auto (opts, opts_set, decoded, lang_mask, kind,
1926 /* Handle --param NAME=VALUE. */
1928 handle_param (struct gcc_options *opts, struct gcc_options *opts_set,
1929 location_t loc, const char *carg)
1934 arg = xstrdup (carg);
1935 equal = strchr (arg, '=');
1937 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE",
1941 value = integral_argument (equal + 1);
1943 error_at (loc, "invalid --param value %qs", equal + 1);
1947 set_param_value (arg, value,
1948 opts->x_param_values, opts_set->x_param_values);
1955 /* Used to set the level of strict aliasing warnings in OPTS,
1956 when no level is specified (i.e., when -Wstrict-aliasing, and not
1957 -Wstrict-aliasing=level was given).
1958 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1959 and 0 otherwise. After calling this function, wstrict_aliasing will be
1960 set to the default value of -Wstrict_aliasing=level, currently 3. */
1962 set_Wstrict_aliasing (struct gcc_options *opts, int onoff)
1964 gcc_assert (onoff == 0 || onoff == 1);
1966 opts->x_warn_strict_aliasing = 3;
1968 opts->x_warn_strict_aliasing = 0;
1971 /* The following routines are useful in setting all the flags that
1972 -ffast-math and -fno-fast-math imply. */
1974 set_fast_math_flags (struct gcc_options *opts, int set)
1976 if (!opts->frontend_set_flag_unsafe_math_optimizations)
1978 opts->x_flag_unsafe_math_optimizations = set;
1979 set_unsafe_math_optimizations_flags (opts, set);
1981 if (!opts->frontend_set_flag_finite_math_only)
1982 opts->x_flag_finite_math_only = set;
1983 if (!opts->frontend_set_flag_errno_math)
1984 opts->x_flag_errno_math = !set;
1987 if (!opts->frontend_set_flag_signaling_nans)
1988 opts->x_flag_signaling_nans = 0;
1989 if (!opts->frontend_set_flag_rounding_math)
1990 opts->x_flag_rounding_math = 0;
1991 if (!opts->frontend_set_flag_cx_limited_range)
1992 opts->x_flag_cx_limited_range = 1;
1996 /* When -funsafe-math-optimizations is set the following
1997 flags are set as well. */
1999 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
2001 if (!opts->frontend_set_flag_trapping_math)
2002 opts->x_flag_trapping_math = !set;
2003 if (!opts->frontend_set_flag_signed_zeros)
2004 opts->x_flag_signed_zeros = !set;
2005 if (!opts->frontend_set_flag_associative_math)
2006 opts->x_flag_associative_math = set;
2007 if (!opts->frontend_set_flag_reciprocal_math)
2008 opts->x_flag_reciprocal_math = set;
2011 /* Return true iff flags in OPTS are set as if -ffast-math. */
2013 fast_math_flags_set_p (const struct gcc_options *opts)
2015 return (!opts->x_flag_trapping_math
2016 && opts->x_flag_unsafe_math_optimizations
2017 && opts->x_flag_finite_math_only
2018 && !opts->x_flag_signed_zeros
2019 && !opts->x_flag_errno_math);
2022 /* Return true iff flags are set as if -ffast-math but using the flags stored
2023 in the struct cl_optimization structure. */
2025 fast_math_flags_struct_set_p (struct cl_optimization *opt)
2027 return (!opt->x_flag_trapping_math
2028 && opt->x_flag_unsafe_math_optimizations
2029 && opt->x_flag_finite_math_only
2030 && !opt->x_flag_signed_zeros
2031 && !opt->x_flag_errno_math);
2034 /* Handle a debug output -g switch for options OPTS
2035 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2036 explicitly), location LOC. EXTENDED is true or false to support
2037 extended output (2 is special and means "-ggdb" was given). */
2039 set_debug_level (enum debug_info_type type, int extended, const char *arg,
2040 struct gcc_options *opts, struct gcc_options *opts_set,
2043 opts->x_use_gnu_debug_info_extensions = extended;
2045 if (type == NO_DEBUG)
2047 if (opts->x_write_symbols == NO_DEBUG)
2049 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE;
2053 #ifdef DWARF2_DEBUGGING_INFO
2054 opts->x_write_symbols = DWARF2_DEBUG;
2055 #elif defined DBX_DEBUGGING_INFO
2056 opts->x_write_symbols = DBX_DEBUG;
2060 if (opts->x_write_symbols == NO_DEBUG)
2061 warning_at (loc, 0, "target system does not support debug output");
2066 /* Does it conflict with an already selected type? */
2067 if (opts_set->x_write_symbols != NO_DEBUG
2068 && opts->x_write_symbols != NO_DEBUG
2069 && type != opts->x_write_symbols)
2070 error_at (loc, "debug format \"%s\" conflicts with prior selection",
2071 debug_type_names[type]);
2072 opts->x_write_symbols = type;
2073 opts_set->x_write_symbols = type;
2076 /* A debug flag without a level defaults to level 2. */
2079 if (!opts->x_debug_info_level)
2080 opts->x_debug_info_level = DINFO_LEVEL_NORMAL;
2084 int argval = integral_argument (arg);
2086 error_at (loc, "unrecognised debug output level \"%s\"", arg);
2087 else if (argval > 3)
2088 error_at (loc, "debug output level %s is too high", arg);
2090 opts->x_debug_info_level = (enum debug_info_levels) argval;
2094 /* Arrange to dump core on error for diagnostic context DC. (The
2095 regular error message is still printed first, except in the case of
2099 setup_core_dumping (diagnostic_context *dc)
2102 signal (SIGABRT, SIG_DFL);
2104 #if defined(HAVE_SETRLIMIT)
2107 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
2108 fatal_error ("getting core file size maximum limit: %m");
2109 rlim.rlim_cur = rlim.rlim_max;
2110 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
2111 fatal_error ("setting core file size limit to maximum: %m");
2114 diagnostic_abort_on_error (dc);
2117 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2118 diagnostic context DC. */
2121 decode_d_option (const char *arg, struct gcc_options *opts,
2122 location_t loc, diagnostic_context *dc)
2130 opts->x_flag_debug_asm = 1;
2133 opts->x_flag_print_asm_name = 1;
2136 opts->x_flag_dump_rtl_in_asm = 1;
2137 opts->x_flag_print_asm_name = 1;
2140 opts->x_rtl_dump_and_exit = 1;
2142 case 'D': /* These are handled by the preprocessor. */
2149 setup_core_dumping (dc);
2152 opts->x_flag_dump_all_passed = true;
2156 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c);
2161 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2162 mask LANG_MASK, option handlers HANDLERS) as an error for option
2163 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2164 NULL), location LOC. This is used by -Werror=. */
2167 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
2168 const struct cl_option_handlers *handlers,
2169 struct gcc_options *opts,
2170 struct gcc_options *opts_set,
2171 location_t loc, diagnostic_context *dc)
2176 new_option = XNEWVEC (char, strlen (arg) + 2);
2177 new_option[0] = 'W';
2178 strcpy (new_option + 1, arg);
2179 option_index = find_opt (new_option, lang_mask);
2180 if (option_index == OPT_SPECIAL_unknown)
2182 error_at (loc, "-Werror=%s: no option -%s", arg, new_option);
2186 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2188 control_warning_option (option_index, (int) kind, value,
2190 handlers, opts, opts_set, dc);
2195 /* Return malloced memory for the name of the option OPTION_INDEX
2196 which enabled a diagnostic (context CONTEXT), originally of type
2197 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2201 option_name (diagnostic_context *context, int option_index,
2202 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
2206 /* A warning classified as an error. */
2207 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
2208 && diag_kind == DK_ERROR)
2209 return concat (cl_options[OPT_Werror_].opt_text,
2210 /* Skip over "-W". */
2211 cl_options[option_index].opt_text + 2,
2213 /* A warning with option. */
2215 return xstrdup (cl_options[option_index].opt_text);
2217 /* A warning without option classified as an error. */
2218 else if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2219 || diag_kind == DK_WARNING)
2220 && context->warning_as_error_requested)
2221 return xstrdup (cl_options[OPT_Werror].opt_text);