1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
26 #include "tm.h" /* Needed by rtl.h and used for STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
29 #include "rtl.h" /* Needed by insn-attr.h. */
34 #include "diagnostic.h"
35 #include "opts-diagnostic.h"
36 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
39 /* Parse the -femit-struct-debug-detailed option value
40 and set the flag variables. */
42 #define MATCH( prefix, string ) \
43 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
44 ? ((string += sizeof prefix - 1), 1) : 0)
47 set_struct_debug_option (struct gcc_options *opts, location_t loc,
50 /* various labels for comparison */
51 static const char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
52 static const char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
53 static const char none_lbl[] = "none", any_lbl[] = "any";
54 static const char base_lbl[] = "base", sys_lbl[] = "sys";
56 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
57 /* Default is to apply to as much as possible. */
58 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
62 if (MATCH (dfn_lbl, spec))
63 usage = DINFO_USAGE_DFN;
64 else if (MATCH (dir_lbl, spec))
65 usage = DINFO_USAGE_DIR_USE;
66 else if (MATCH (ind_lbl, spec))
67 usage = DINFO_USAGE_IND_USE;
69 /* Generics or not? */
70 if (MATCH (ord_lbl, spec))
72 else if (MATCH (gen_lbl, spec))
75 /* What allowable environment? */
76 if (MATCH (none_lbl, spec))
77 files = DINFO_STRUCT_FILE_NONE;
78 else if (MATCH (any_lbl, spec))
79 files = DINFO_STRUCT_FILE_ANY;
80 else if (MATCH (sys_lbl, spec))
81 files = DINFO_STRUCT_FILE_SYS;
82 else if (MATCH (base_lbl, spec))
83 files = DINFO_STRUCT_FILE_BASE;
86 "argument %qs to %<-femit-struct-debug-detailed%> "
90 /* Effect the specification. */
91 if (usage == DINFO_USAGE_NUM_ENUMS)
95 opts->x_debug_struct_ordinary[DINFO_USAGE_DFN] = files;
96 opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
97 opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
101 opts->x_debug_struct_generic[DINFO_USAGE_DFN] = files;
102 opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
103 opts->x_debug_struct_generic[DINFO_USAGE_IND_USE] = files;
109 opts->x_debug_struct_ordinary[usage] = files;
111 opts->x_debug_struct_generic[usage] = files;
115 set_struct_debug_option (opts, loc, spec+1);
118 /* No more -femit-struct-debug-detailed specifications.
122 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
124 if (opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE]
125 < opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE]
126 || opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE]
127 < opts->x_debug_struct_generic[DINFO_USAGE_IND_USE])
129 "%<-femit-struct-debug-detailed=dir:...%> must allow "
130 "at least as much as "
131 "%<-femit-struct-debug-detailed=ind:...%>");
135 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
138 vect_set_verbosity_level (struct gcc_options *opts, int val)
140 if (val < MAX_VERBOSITY_LEVEL)
141 opts->x_user_vect_verbosity_level = (enum vect_verbosity_levels) val;
143 opts->x_user_vect_verbosity_level
144 = (enum vect_verbosity_levels) (MAX_VERBOSITY_LEVEL - 1);
148 /* Strip off a legitimate source ending from the input string NAME of
149 length LEN. Rather than having to know the names used by all of
150 our front ends, we strip off an ending of a period followed by
151 up to five characters. (Java uses ".class".) */
154 strip_off_ending (char *name, int len)
157 for (i = 2; i < 6 && len > i; i++)
159 if (name[len - i] == '.')
161 name[len - i] = '\0';
167 /* Find the base name of a path, stripping off both directories and
168 a single final extension. */
170 base_of_path (const char *path, const char **base_out)
172 const char *base = path;
174 const char *p = path;
178 if (IS_DIR_SEPARATOR(c))
193 /* What to print when a switch has no documentation. */
194 static const char undocumented_msg[] = N_("This switch lacks documentation");
196 typedef char *char_p; /* For DEF_VEC_P. */
198 DEF_VEC_ALLOC_P(char_p,heap);
200 static void handle_param (struct gcc_options *opts,
201 struct gcc_options *opts_set, location_t loc,
203 static void set_debug_level (enum debug_info_type type, int extended,
204 const char *arg, struct gcc_options *opts,
205 struct gcc_options *opts_set,
207 static void set_fast_math_flags (struct gcc_options *opts, int set);
208 static void decode_d_option (const char *arg, struct gcc_options *opts,
209 location_t loc, diagnostic_context *dc);
210 static void set_unsafe_math_optimizations_flags (struct gcc_options *opts,
212 static void enable_warning_as_error (const char *arg, int value,
213 unsigned int lang_mask,
214 const struct cl_option_handlers *handlers,
215 struct gcc_options *opts,
216 struct gcc_options *opts_set,
218 diagnostic_context *dc);
220 /* Handle a back-end option; arguments and return value as for
224 target_handle_option (struct gcc_options *opts,
225 struct gcc_options *opts_set,
226 const struct cl_decoded_option *decoded,
227 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
229 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
230 diagnostic_context *dc)
232 gcc_assert (dc == global_dc);
233 gcc_assert (kind == DK_UNSPECIFIED);
234 return targetm.handle_option (opts, opts_set, decoded, loc);
237 /* Add comma-separated strings to a char_p vector. */
240 add_comma_separated_to_vector (void **pvec, const char *arg)
246 VEC(char_p,heap) *vec = (VEC(char_p,heap) *) *pvec;
248 /* We never free this string. */
261 VEC_safe_push (char_p, heap, vec, token_start);
264 if (*r == '\\' && r[1] == ',')
272 if (*token_start != '\0')
273 VEC_safe_push (char_p, heap, vec, token_start);
278 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
281 init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set)
283 size_t num_params = get_num_compiler_params ();
285 *opts = global_options_init;
286 memset (opts_set, 0, sizeof (*opts_set));
288 opts->x_param_values = XNEWVEC (int, num_params);
289 opts_set->x_param_values = XCNEWVEC (int, num_params);
290 init_param_values (opts->x_param_values);
292 /* Initialize whether `char' is signed. */
293 opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR;
294 /* Set this to a special "uninitialized" value. The actual default
295 is set after target options have been processed. */
296 opts->x_flag_short_enums = 2;
298 /* Initialize target_flags before targetm.target_option.optimization
299 so the latter can modify it. */
300 opts->x_target_flags = targetm.default_target_flags;
302 /* Some targets have ABI-specified unwind tables. */
303 opts->x_flag_unwind_tables = targetm.unwind_tables_default;
305 /* Some targets have other target-specific initialization. */
306 targetm.target_option.init_struct (opts);
309 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
310 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
311 OPTS_SET, diagnostic context DC, location LOC, with language mask
312 LANG_MASK and option handlers HANDLERS. */
315 maybe_default_option (struct gcc_options *opts,
316 struct gcc_options *opts_set,
317 const struct default_options *default_opt,
318 int level, bool size, bool fast,
319 unsigned int lang_mask,
320 const struct cl_option_handlers *handlers,
322 diagnostic_context *dc)
324 const struct cl_option *option = &cl_options[default_opt->opt_index];
328 gcc_assert (level == 2);
330 gcc_assert (level == 3);
332 switch (default_opt->levels)
338 case OPT_LEVELS_0_ONLY:
339 enabled = (level == 0);
342 case OPT_LEVELS_1_PLUS:
343 enabled = (level >= 1);
346 case OPT_LEVELS_1_PLUS_SPEED_ONLY:
347 enabled = (level >= 1 && !size);
350 case OPT_LEVELS_2_PLUS:
351 enabled = (level >= 2);
354 case OPT_LEVELS_2_PLUS_SPEED_ONLY:
355 enabled = (level >= 2 && !size);
358 case OPT_LEVELS_3_PLUS:
359 enabled = (level >= 3);
362 case OPT_LEVELS_3_PLUS_AND_SIZE:
363 enabled = (level >= 3 || size);
366 case OPT_LEVELS_SIZE:
370 case OPT_LEVELS_FAST:
374 case OPT_LEVELS_NONE:
380 handle_generated_option (opts, opts_set, default_opt->opt_index,
381 default_opt->arg, default_opt->value,
382 lang_mask, DK_UNSPECIFIED, loc,
384 else if (default_opt->arg == NULL
385 && !option->cl_reject_negative)
386 handle_generated_option (opts, opts_set, default_opt->opt_index,
387 default_opt->arg, !default_opt->value,
388 lang_mask, DK_UNSPECIFIED, loc,
392 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
393 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
394 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
395 language mask LANG_MASK and option handlers HANDLERS. */
398 maybe_default_options (struct gcc_options *opts,
399 struct gcc_options *opts_set,
400 const struct default_options *default_opts,
401 int level, bool size, bool fast,
402 unsigned int lang_mask,
403 const struct cl_option_handlers *handlers,
405 diagnostic_context *dc)
409 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++)
410 maybe_default_option (opts, opts_set, &default_opts[i],
411 level, size, fast, lang_mask, handlers, loc, dc);
414 /* Table of options enabled by default at different levels. */
416 static const struct default_options default_options_table[] =
418 /* -O1 optimizations. */
419 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
421 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 },
423 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
424 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
425 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
426 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 },
427 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 },
428 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
429 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
430 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
431 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
432 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
433 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
434 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 },
435 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
436 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
437 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
438 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
439 { OPT_LEVELS_1_PLUS, OPT_ftree_sra, NULL, 1 },
440 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 },
441 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
442 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
443 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
444 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
445 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
446 { OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
448 /* -O2 optimizations. */
449 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
450 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
451 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
452 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
453 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
454 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
455 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
456 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
457 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
458 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
459 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
460 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
461 #ifdef INSN_SCHEDULING
462 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
463 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
464 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
466 { OPT_LEVELS_2_PLUS, OPT_fregmove, NULL, 1 },
467 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
468 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
469 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
470 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
471 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
472 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
473 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
474 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
475 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
476 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
477 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
478 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 },
479 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 },
480 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 },
481 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 },
483 /* -O3 optimizations. */
484 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
485 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
486 /* Inlining of functions reducing size is a good idea with -Os
487 regardless of them being declared inline. */
488 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
489 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
490 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
491 { OPT_LEVELS_3_PLUS, OPT_ftree_vectorize, NULL, 1 },
492 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
494 /* -Ofast adds optimizations to -O3. */
495 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
497 { OPT_LEVELS_NONE, 0, NULL, 0 }
500 /* Default the options in OPTS and OPTS_SET based on the optimization
501 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
503 default_options_optimization (struct gcc_options *opts,
504 struct gcc_options *opts_set,
505 struct cl_decoded_option *decoded_options,
506 unsigned int decoded_options_count,
508 unsigned int lang_mask,
509 const struct cl_option_handlers *handlers,
510 diagnostic_context *dc)
515 /* Scan to see what optimization level has been specified. That will
516 determine the default value of many flags. */
517 for (i = 1; i < decoded_options_count; i++)
519 struct cl_decoded_option *opt = &decoded_options[i];
520 switch (opt->opt_index)
523 if (*opt->arg == '\0')
525 opts->x_optimize = 1;
526 opts->x_optimize_size = 0;
527 opts->x_optimize_fast = 0;
531 const int optimize_val = integral_argument (opt->arg);
532 if (optimize_val == -1)
534 "argument to %qs should be a non-negative integer",
538 opts->x_optimize = optimize_val;
539 if ((unsigned int) opts->x_optimize > 255)
540 opts->x_optimize = 255;
541 opts->x_optimize_size = 0;
542 opts->x_optimize_fast = 0;
548 opts->x_optimize_size = 1;
550 /* Optimizing for size forces optimize to be 2. */
551 opts->x_optimize = 2;
552 opts->x_optimize_fast = 0;
556 /* -Ofast only adds flags to -O3. */
557 opts->x_optimize_size = 0;
558 opts->x_optimize = 3;
559 opts->x_optimize_fast = 1;
563 /* Ignore other options in this prescan. */
568 maybe_default_options (opts, opts_set, default_options_table,
569 opts->x_optimize, opts->x_optimize_size,
570 opts->x_optimize_fast, lang_mask, handlers, loc, dc);
572 /* -O2 param settings. */
573 opt2 = (opts->x_optimize >= 2);
575 /* Track fields in field-sensitive alias analysis. */
576 maybe_set_param_value
577 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
578 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE),
579 opts->x_param_values, opts_set->x_param_values);
581 /* For -O1 only do loop invariant motion for very small loops. */
582 maybe_set_param_value
583 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
584 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000,
585 opts->x_param_values, opts_set->x_param_values);
587 if (opts->x_optimize_size)
588 /* We want to crossjump as much as possible. */
589 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1,
590 opts->x_param_values, opts_set->x_param_values);
592 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS,
593 default_param_value (PARAM_MIN_CROSSJUMP_INSNS),
594 opts->x_param_values, opts_set->x_param_values);
596 /* Allow default optimizations to be specified on a per-machine basis. */
597 maybe_default_options (opts, opts_set,
598 targetm.target_option.optimization_table,
599 opts->x_optimize, opts->x_optimize_size,
600 opts->x_optimize_fast, lang_mask, handlers, loc, dc);
603 /* After all options at LOC have been read into OPTS and OPTS_SET,
604 finalize settings of those options and diagnose incompatible
607 finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
610 enum unwind_info_type ui_except;
612 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name))
614 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
615 OPTS->X_DUMP_DIR_NAME directory. Then try to make
616 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
617 directory, typically the directory to contain the object
619 if (opts->x_dump_dir_name)
620 opts->x_dump_base_name = concat (opts->x_dump_dir_name,
621 opts->x_dump_base_name, NULL);
622 else if (opts->x_aux_base_name
623 && strcmp (opts->x_aux_base_name, HOST_BIT_BUCKET) != 0)
625 const char *aux_base;
627 base_of_path (opts->x_aux_base_name, &aux_base);
628 if (opts->x_aux_base_name != aux_base)
630 int dir_len = aux_base - opts->x_aux_base_name;
631 char *new_dump_base_name =
632 XNEWVEC (char, strlen (opts->x_dump_base_name) + dir_len + 1);
634 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
635 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len);
636 /* Append existing OPTS->X_DUMP_BASE_NAME. */
637 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name);
638 opts->x_dump_base_name = new_dump_base_name;
643 /* Handle related options for unit-at-a-time, toplevel-reorder, and
645 if (!opts->x_flag_unit_at_a_time)
647 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
648 error_at (loc, "section anchors must be disabled when unit-at-a-time "
650 opts->x_flag_section_anchors = 0;
651 if (opts->x_flag_toplevel_reorder == 1)
652 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time "
654 opts->x_flag_toplevel_reorder = 0;
657 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
658 if (opts->x_warn_missing_noreturn)
659 opts->x_warn_suggest_attribute_noreturn = true;
661 /* Unless the user has asked for section anchors, we disable toplevel
662 reordering at -O0 to disable transformations that might be surprising
663 to end users and to get -fno-toplevel-reorder tested. */
664 if (!opts->x_optimize
665 && opts->x_flag_toplevel_reorder == 2
666 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors))
668 opts->x_flag_toplevel_reorder = 0;
669 opts->x_flag_section_anchors = 0;
671 if (!opts->x_flag_toplevel_reorder)
673 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
674 error_at (loc, "section anchors must be disabled when toplevel reorder"
676 opts->x_flag_section_anchors = 0;
679 if (!opts->x_flag_opts_finished)
681 if (opts->x_flag_pie)
682 opts->x_flag_pic = opts->x_flag_pie;
683 if (opts->x_flag_pic && !opts->x_flag_pie)
684 opts->x_flag_shlib = 1;
685 opts->x_flag_opts_finished = true;
688 if (opts->x_optimize == 0)
690 /* Inlining does not work if not optimizing,
691 so force it not to be done. */
692 opts->x_warn_inline = 0;
693 opts->x_flag_no_inline = 1;
696 /* The optimization to partition hot and cold basic blocks into separate
697 sections of the .o and executable files does not work (currently)
698 with exception handling. This is because there is no support for
699 generating unwind info. If opts->x_flag_exceptions is turned on
700 we need to turn off the partitioning optimization. */
702 ui_except = targetm.except_unwind_info (opts);
704 if (opts->x_flag_exceptions
705 && opts->x_flag_reorder_blocks_and_partition
706 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
709 "-freorder-blocks-and-partition does not work "
710 "with exceptions on this architecture");
711 opts->x_flag_reorder_blocks_and_partition = 0;
712 opts->x_flag_reorder_blocks = 1;
715 /* If user requested unwind info, then turn off the partitioning
718 if (opts->x_flag_unwind_tables
719 && !targetm.unwind_tables_default
720 && opts->x_flag_reorder_blocks_and_partition
721 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
724 "-freorder-blocks-and-partition does not support "
725 "unwind info on this architecture");
726 opts->x_flag_reorder_blocks_and_partition = 0;
727 opts->x_flag_reorder_blocks = 1;
730 /* If the target requested unwind info, then turn off the partitioning
731 optimization with a different message. Likewise, if the target does not
732 support named sections. */
734 if (opts->x_flag_reorder_blocks_and_partition
735 && (!targetm.have_named_sections
736 || (opts->x_flag_unwind_tables
737 && targetm.unwind_tables_default
738 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))))
741 "-freorder-blocks-and-partition does not work "
742 "on this architecture");
743 opts->x_flag_reorder_blocks_and_partition = 0;
744 opts->x_flag_reorder_blocks = 1;
747 if (opts->x_flag_reorder_blocks_and_partition
748 && !opts_set->x_flag_reorder_functions)
749 opts->x_flag_reorder_functions = 1;
751 /* Pipelining of outer loops is only possible when general pipelining
752 capabilities are requested. */
753 if (!opts->x_flag_sel_sched_pipelining)
754 opts->x_flag_sel_sched_pipelining_outer_loops = 0;
756 if (opts->x_flag_conserve_stack)
758 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100,
759 opts->x_param_values, opts_set->x_param_values);
760 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40,
761 opts->x_param_values, opts_set->x_param_values);
763 if (opts->x_flag_wpa || opts->x_flag_ltrans)
765 /* These passes are not WHOPR compatible yet. */
766 opts->x_flag_ipa_pta = 0;
769 if (opts->x_flag_lto)
772 opts->x_flag_generate_lto = 1;
774 /* When generating IL, do not operate in whole-program mode.
775 Otherwise, symbols will be privatized too early, causing link
777 opts->x_flag_whole_program = 0;
779 error_at (loc, "LTO support has not been enabled in this configuration");
782 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
783 + (opts->x_flag_lto_partition_none != 0) >= 1)
785 if ((opts->x_flag_lto_partition_balanced != 0)
786 + (opts->x_flag_lto_partition_1to1 != 0)
787 + (opts->x_flag_lto_partition_none != 0) > 1)
788 error_at (loc, "only one -flto-partition value can be specified");
791 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
792 default value if they choose based on other options. */
793 if (opts->x_flag_split_stack == -1)
794 opts->x_flag_split_stack = 0;
795 else if (opts->x_flag_split_stack)
797 if (!targetm.supports_split_stack (true, opts))
799 error_at (loc, "%<-fsplit-stack%> is not supported by "
800 "this compiler configuration");
801 opts->x_flag_split_stack = 0;
805 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
807 if (!opts->x_flag_tree_vectorize || !opts->x_flag_tree_loop_if_convert)
808 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK, 0,
809 opts->x_param_values, opts_set->x_param_values);
811 /* This replaces set_Wunused. */
812 if (opts->x_warn_unused_function == -1)
813 opts->x_warn_unused_function = opts->x_warn_unused;
814 if (opts->x_warn_unused_label == -1)
815 opts->x_warn_unused_label = opts->x_warn_unused;
816 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
817 if (opts->x_warn_unused_parameter == -1)
818 opts->x_warn_unused_parameter = (opts->x_warn_unused
819 && opts->x_extra_warnings);
820 if (opts->x_warn_unused_variable == -1)
821 opts->x_warn_unused_variable = opts->x_warn_unused;
822 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
824 if (opts->x_warn_unused_but_set_parameter == -1)
825 opts->x_warn_unused_but_set_parameter = (opts->x_warn_unused
826 && opts->x_extra_warnings);
827 if (opts->x_warn_unused_but_set_variable == -1)
828 opts->x_warn_unused_but_set_variable = opts->x_warn_unused;
829 if (opts->x_warn_unused_value == -1)
830 opts->x_warn_unused_value = opts->x_warn_unused;
832 /* This replaces set_Wextra. */
833 if (opts->x_warn_uninitialized == -1)
834 opts->x_warn_uninitialized = opts->x_extra_warnings;
837 #define LEFT_COLUMN 27
839 /* Output ITEM, of length ITEM_WIDTH, in the left column,
840 followed by word-wrapped HELP in a second column. */
842 wrap_help (const char *help,
844 unsigned int item_width,
845 unsigned int columns)
847 unsigned int col_width = LEFT_COLUMN;
848 unsigned int remaining, room, len;
850 remaining = strlen (help);
854 room = columns - 3 - MAX (col_width, item_width);
863 for (i = 0; help[i]; i++)
865 if (i >= room && len != remaining)
869 else if ((help[i] == '-' || help[i] == '/')
870 && help[i + 1] != ' '
871 && i > 0 && ISALPHA (help[i - 1]))
876 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
878 while (help[len] == ' ')
886 /* Print help for a specific front-end, etc. */
888 print_filtered_help (unsigned int include_flags,
889 unsigned int exclude_flags,
890 unsigned int any_flags,
891 unsigned int columns,
892 struct gcc_options *opts,
893 unsigned int lang_mask)
898 bool displayed = false;
900 if (include_flags == CL_PARAMS)
902 for (i = 0; i < LAST_PARAM; i++)
904 const char *param = compiler_params[i].option;
906 help = compiler_params[i].help;
907 if (help == NULL || *help == '\0')
909 if (exclude_flags & CL_UNDOCUMENTED)
911 help = undocumented_msg;
914 /* Get the translation. */
917 wrap_help (help, param, strlen (param), columns);
923 if (!opts->x_help_printed)
924 opts->x_help_printed = XCNEWVAR (char, cl_options_count);
926 if (!opts->x_help_enum_printed)
927 opts->x_help_enum_printed = XCNEWVAR (char, cl_enums_count);
929 for (i = 0; i < cl_options_count; i++)
932 const struct cl_option *option = cl_options + i;
937 if (include_flags == 0
938 || ((option->flags & include_flags) != include_flags))
940 if ((option->flags & any_flags) == 0)
944 /* Skip unwanted switches. */
945 if ((option->flags & exclude_flags) != 0)
948 /* The driver currently prints its own help text. */
949 if ((option->flags & CL_DRIVER) != 0
950 && (option->flags & (((1U << cl_lang_count) - 1)
951 | CL_COMMON | CL_TARGET)) == 0)
955 /* Skip switches that have already been printed. */
956 if (opts->x_help_printed[i])
959 opts->x_help_printed[i] = true;
964 if (exclude_flags & CL_UNDOCUMENTED)
966 help = undocumented_msg;
969 /* Get the translation. */
972 /* Find the gap between the name of the
973 option and its descriptive text. */
974 tab = strchr (help, '\t');
983 opt = option->opt_text;
987 /* With the -Q option enabled we change the descriptive text associated
988 with an option to be an indication of its current setting. */
991 void *flag_var = option_flag_var (i, opts);
993 if (len < (LEFT_COLUMN + 2))
994 strcpy (new_help, "\t\t");
996 strcpy (new_help, "\t");
999 && option->var_type != CLVC_DEFER)
1001 if (option->flags & CL_JOINED)
1003 if (option->var_type == CLVC_STRING)
1005 if (* (const char **) flag_var != NULL)
1006 snprintf (new_help + strlen (new_help),
1007 sizeof (new_help) - strlen (new_help),
1008 * (const char **) flag_var);
1010 else if (option->var_type == CLVC_ENUM)
1012 const struct cl_enum *e = &cl_enums[option->var_enum];
1014 const char *arg = NULL;
1016 value = e->get (flag_var);
1017 enum_value_to_arg (e->values, &arg, value, lang_mask);
1019 arg = _("[default]");
1020 snprintf (new_help + strlen (new_help),
1021 sizeof (new_help) - strlen (new_help),
1025 sprintf (new_help + strlen (new_help),
1026 "%#x", * (int *) flag_var);
1029 strcat (new_help, option_enabled (i, opts)
1030 ? _("[enabled]") : _("[disabled]"));
1036 wrap_help (help, opt, len, columns);
1039 if (option->var_type == CLVC_ENUM
1040 && opts->x_help_enum_printed[option->var_enum] != 2)
1041 opts->x_help_enum_printed[option->var_enum] = 1;
1046 unsigned int langs = include_flags & CL_LANG_ALL;
1049 printf (_(" No options with the desired characteristics were found\n"));
1054 /* PR 31349: Tell the user how to see all of the
1055 options supported by a specific front end. */
1056 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1057 if ((1U << i) & langs)
1058 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1059 lang_names[i], lang_names[i]);
1063 else if (! displayed)
1064 printf (_(" All options with the desired characteristics have already been displayed\n"));
1068 /* Print details of enumerated option arguments, if those
1069 enumerations have help text headings provided. If no help text
1070 is provided, presume that the possible values are listed in the
1071 help text for the relevant options. */
1072 for (i = 0; i < cl_enums_count; i++)
1074 unsigned int j, pos;
1076 if (opts->x_help_enum_printed[i] != 1)
1078 if (cl_enums[i].help == NULL)
1080 printf (" %s\n ", _(cl_enums[i].help));
1082 for (j = 0; cl_enums[i].values[j].arg != NULL; j++)
1084 unsigned int len = strlen (cl_enums[i].values[j].arg);
1086 if (pos > 4 && pos + 1 + len <= columns)
1088 printf (" %s", cl_enums[i].values[j].arg);
1098 printf ("%s", cl_enums[i].values[j].arg);
1103 opts->x_help_enum_printed[i] = 2;
1107 /* Display help for a specified type of option.
1108 The options must have ALL of the INCLUDE_FLAGS set
1109 ANY of the flags in the ANY_FLAGS set
1110 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1111 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1113 print_specific_help (unsigned int include_flags,
1114 unsigned int exclude_flags,
1115 unsigned int any_flags,
1116 struct gcc_options *opts,
1117 unsigned int lang_mask)
1119 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1120 const char * description = NULL;
1121 const char * descrip_extra = "";
1125 /* Sanity check: Make sure that we do not have more
1126 languages than we have bits available to enumerate them. */
1127 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1129 /* If we have not done so already, obtain
1130 the desired maximum width of the output. */
1131 if (opts->x_help_columns == 0)
1135 p = getenv ("COLUMNS");
1138 int value = atoi (p);
1141 opts->x_help_columns = value;
1144 if (opts->x_help_columns == 0)
1145 /* Use a reasonable default. */
1146 opts->x_help_columns = 80;
1149 /* Decide upon the title for the options that we are going to display. */
1150 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1152 switch (flag & include_flags)
1159 description = _("The following options are target specific");
1162 description = _("The following options control compiler warning messages");
1164 case CL_OPTIMIZATION:
1165 description = _("The following options control optimizations");
1168 description = _("The following options are language-independent");
1171 description = _("The --param option recognizes the following as parameters");
1174 if (i >= cl_lang_count)
1176 if (exclude_flags & all_langs_mask)
1177 description = _("The following options are specific to just the language ");
1179 description = _("The following options are supported by the language ");
1180 descrip_extra = lang_names [i];
1185 if (description == NULL)
1189 if (include_flags & CL_UNDOCUMENTED)
1190 description = _("The following options are not documented");
1191 else if (include_flags & CL_SEPARATE)
1192 description = _("The following options take separate arguments");
1193 else if (include_flags & CL_JOINED)
1194 description = _("The following options take joined arguments");
1197 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1204 if (any_flags & all_langs_mask)
1205 description = _("The following options are language-related");
1207 description = _("The following options are language-independent");
1211 printf ("%s%s:\n", description, descrip_extra);
1212 print_filtered_help (include_flags, exclude_flags, any_flags,
1213 opts->x_help_columns, opts, lang_mask);
1216 /* Handle target- and language-independent options. Return zero to
1217 generate an "unknown option" message. Only options that need
1218 extra handling need to be listed here; if you simply want
1219 DECODED->value assigned to a variable, it happens automatically. */
1222 common_handle_option (struct gcc_options *opts,
1223 struct gcc_options *opts_set,
1224 const struct cl_decoded_option *decoded,
1225 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1227 const struct cl_option_handlers *handlers,
1228 diagnostic_context *dc)
1230 size_t scode = decoded->opt_index;
1231 const char *arg = decoded->arg;
1232 int value = decoded->value;
1233 enum opt_code code = (enum opt_code) scode;
1235 gcc_assert (decoded->canonical_option_num_elements <= 2);
1240 handle_param (opts, opts_set, loc, arg);
1245 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1246 unsigned int undoc_mask;
1249 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings)
1252 /* First display any single language specific options. */
1253 for (i = 0; i < cl_lang_count; i++)
1255 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts,
1257 /* Next display any multi language specific options. */
1258 print_specific_help (0, undoc_mask, all_langs_mask, opts, lang_mask);
1259 /* Then display any remaining, non-language options. */
1260 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1262 print_specific_help (i, undoc_mask, 0, opts, lang_mask);
1263 opts->x_exit_after_options = true;
1267 case OPT__target_help:
1268 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts, lang_mask);
1269 opts->x_exit_after_options = true;
1271 /* Allow the target a chance to give the user some additional information. */
1278 const char * a = arg;
1279 unsigned int include_flags = 0;
1280 /* Note - by default we include undocumented options when listing
1281 specific classes. If you only want to see documented options
1282 then add ",^undocumented" to the --help= option. E.g.:
1284 --help=target,^undocumented */
1285 unsigned int exclude_flags = 0;
1287 /* Walk along the argument string, parsing each word in turn.
1289 arg = [^]{word}[,{arg}]
1290 word = {optimizers|target|warnings|undocumented|
1291 params|common|<language>} */
1296 const char * string;
1301 { "optimizers", CL_OPTIMIZATION },
1302 { "target", CL_TARGET },
1303 { "warnings", CL_WARNING },
1304 { "undocumented", CL_UNDOCUMENTED },
1305 { "params", CL_PARAMS },
1306 { "joined", CL_JOINED },
1307 { "separate", CL_SEPARATE },
1308 { "common", CL_COMMON },
1311 unsigned int * pflags;
1313 unsigned int lang_flag, specific_flag;
1320 pflags = & exclude_flags;
1323 pflags = & include_flags;
1325 comma = strchr (a, ',');
1336 /* Check to see if the string matches an option class name. */
1337 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1338 if (strncasecmp (a, specifics[i].string, len) == 0)
1340 specific_flag = specifics[i].flag;
1344 /* Check to see if the string matches a language name.
1345 Note - we rely upon the alpha-sorted nature of the entries in
1346 the lang_names array, specifically that shorter names appear
1347 before their longer variants. (i.e. C before C++). That way
1348 when we are attempting to match --help=c for example we will
1349 match with C first and not C++. */
1350 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1351 if (strncasecmp (a, lang_names[i], len) == 0)
1353 lang_flag = 1U << i;
1357 if (specific_flag != 0)
1360 * pflags |= specific_flag;
1363 /* The option's argument matches both the start of a
1364 language name and the start of an option class name.
1365 We have a special case for when the user has
1366 specified "--help=c", but otherwise we have to issue
1368 if (strncasecmp (a, "c", len) == 0)
1369 * pflags |= lang_flag;
1372 "--help argument %q.*s is ambiguous, "
1373 "please be more specific",
1377 else if (lang_flag != 0)
1378 * pflags |= lang_flag;
1381 "unrecognized argument to --help= option: %q.*s",
1390 print_specific_help (include_flags, exclude_flags, 0, opts,
1392 opts->x_exit_after_options = true;
1397 opts->x_exit_after_options = true;
1403 /* Currently handled in a prescan. */
1407 enable_warning_as_error (arg, value, lang_mask, handlers,
1408 opts, opts_set, loc, dc);
1411 case OPT_Wlarger_than_:
1412 opts->x_larger_than_size = value;
1413 opts->x_warn_larger_than = value != -1;
1416 case OPT_Wfatal_errors:
1417 dc->fatal_errors = value;
1420 case OPT_Wframe_larger_than_:
1421 opts->x_frame_larger_than_size = value;
1422 opts->x_warn_frame_larger_than = value != -1;
1425 case OPT_Wstrict_aliasing:
1426 set_Wstrict_aliasing (opts, value);
1429 case OPT_Wstrict_overflow:
1430 opts->x_warn_strict_overflow = (value
1431 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1435 case OPT_Wsystem_headers:
1436 dc->dc_warn_system_headers = value;
1440 opts->x_flag_gen_aux_info = 1;
1443 case OPT_auxbase_strip:
1445 char *tmp = xstrdup (arg);
1446 strip_off_ending (tmp, strlen (tmp));
1448 opts->x_aux_base_name = tmp;
1453 decode_d_option (arg, opts, loc, dc);
1456 case OPT_fcall_used_:
1457 case OPT_fcall_saved_:
1462 case OPT_fdbg_cnt_list:
1466 case OPT_fdebug_prefix_map_:
1470 case OPT_fdiagnostics_show_location_:
1471 diagnostic_prefixing_rule (dc) = (diagnostic_prefixing_rule_t) value;
1474 case OPT_fdiagnostics_show_option:
1475 dc->show_option_requested = value;
1482 case OPT_ffast_math:
1483 set_fast_math_flags (opts, value);
1486 case OPT_funsafe_math_optimizations:
1487 set_unsafe_math_optimizations_flags (opts, value);
1494 case OPT_finline_limit_:
1495 set_param_value ("max-inline-insns-single", value / 2,
1496 opts->x_param_values, opts_set->x_param_values);
1497 set_param_value ("max-inline-insns-auto", value / 2,
1498 opts->x_param_values, opts_set->x_param_values);
1501 case OPT_finstrument_functions_exclude_function_list_:
1502 add_comma_separated_to_vector
1503 (&opts->x_flag_instrument_functions_exclude_functions, arg);
1506 case OPT_finstrument_functions_exclude_file_list_:
1507 add_comma_separated_to_vector
1508 (&opts->x_flag_instrument_functions_exclude_files, arg);
1511 case OPT_fmessage_length_:
1512 pp_set_line_maximum_length (dc->printer, value);
1515 case OPT_fpack_struct_:
1516 if (value <= 0 || (value & (value - 1)) || value > 16)
1518 "structure alignment must be a small power of two, not %d",
1521 opts->x_initial_max_fld_align = value;
1525 case OPT_fplugin_arg_:
1529 case OPT_fprofile_use_:
1530 opts->x_profile_data_prefix = xstrdup (arg);
1531 opts->x_flag_profile_use = true;
1533 /* No break here - do -fprofile-use processing. */
1534 case OPT_fprofile_use:
1535 if (!opts_set->x_flag_branch_probabilities)
1536 opts->x_flag_branch_probabilities = value;
1537 if (!opts_set->x_flag_profile_values)
1538 opts->x_flag_profile_values = value;
1539 if (!opts_set->x_flag_unroll_loops)
1540 opts->x_flag_unroll_loops = value;
1541 if (!opts_set->x_flag_peel_loops)
1542 opts->x_flag_peel_loops = value;
1543 if (!opts_set->x_flag_tracer)
1544 opts->x_flag_tracer = value;
1545 if (!opts_set->x_flag_value_profile_transformations)
1546 opts->x_flag_value_profile_transformations = value;
1547 if (!opts_set->x_flag_inline_functions)
1548 opts->x_flag_inline_functions = value;
1549 if (!opts_set->x_flag_ipa_cp)
1550 opts->x_flag_ipa_cp = value;
1551 if (!opts_set->x_flag_ipa_cp_clone
1552 && value && opts->x_flag_ipa_cp)
1553 opts->x_flag_ipa_cp_clone = value;
1554 if (!opts_set->x_flag_predictive_commoning)
1555 opts->x_flag_predictive_commoning = value;
1556 if (!opts_set->x_flag_unswitch_loops)
1557 opts->x_flag_unswitch_loops = value;
1558 if (!opts_set->x_flag_gcse_after_reload)
1559 opts->x_flag_gcse_after_reload = value;
1562 case OPT_fprofile_generate_:
1563 opts->x_profile_data_prefix = xstrdup (arg);
1565 /* No break here - do -fprofile-generate processing. */
1566 case OPT_fprofile_generate:
1567 if (!opts_set->x_profile_arc_flag)
1568 opts->x_profile_arc_flag = value;
1569 if (!opts_set->x_flag_profile_values)
1570 opts->x_flag_profile_values = value;
1571 if (!opts_set->x_flag_value_profile_transformations)
1572 opts->x_flag_value_profile_transformations = value;
1573 if (!opts_set->x_flag_inline_functions)
1574 opts->x_flag_inline_functions = value;
1575 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1576 quadratic. Disable the pass until better memory representation
1578 if (!opts_set->x_flag_ipa_reference && in_lto_p)
1579 opts->x_flag_ipa_reference = false;
1582 case OPT_fshow_column:
1583 dc->show_column = value;
1586 case OPT_frandom_seed:
1587 /* The real switch is -fno-random-seed. */
1593 case OPT_frandom_seed_:
1597 case OPT_fsched_verbose_:
1598 #ifdef INSN_SCHEDULING
1599 /* Handled with Var in common.opt. */
1605 case OPT_fsched_stalled_insns_:
1606 opts->x_flag_sched_stalled_insns = value;
1607 if (opts->x_flag_sched_stalled_insns == 0)
1608 opts->x_flag_sched_stalled_insns = -1;
1611 case OPT_fsched_stalled_insns_dep_:
1612 opts->x_flag_sched_stalled_insns_dep = value;
1615 case OPT_fstack_check_:
1616 if (!strcmp (arg, "no"))
1617 opts->x_flag_stack_check = NO_STACK_CHECK;
1618 else if (!strcmp (arg, "generic"))
1619 /* This is the old stack checking method. */
1620 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1621 ? FULL_BUILTIN_STACK_CHECK
1622 : GENERIC_STACK_CHECK;
1623 else if (!strcmp (arg, "specific"))
1624 /* This is the new stack checking method. */
1625 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1626 ? FULL_BUILTIN_STACK_CHECK
1627 : STACK_CHECK_STATIC_BUILTIN
1628 ? STATIC_BUILTIN_STACK_CHECK
1629 : GENERIC_STACK_CHECK;
1631 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg);
1634 case OPT_fstack_limit:
1635 /* The real switch is -fno-stack-limit. */
1641 case OPT_fstack_limit_register_:
1642 case OPT_fstack_limit_symbol_:
1646 case OPT_ftree_vectorizer_verbose_:
1647 vect_set_verbosity_level (opts, value);
1651 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set,
1656 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
1660 if (value < 2 || value > 4)
1661 error_at (loc, "dwarf version %d is not supported", value);
1663 dwarf_version = value;
1664 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc);
1668 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
1673 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,
1678 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc);
1683 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set,
1687 case OPT_pedantic_errors:
1688 opts->x_pedantic = 1;
1689 dc->pedantic_errors = 1;
1693 opts->x_flag_lto = value ? "" : NULL;
1697 dc->dc_inhibit_warnings = true;
1700 case OPT_fmax_errors_:
1701 dc->max_errors = value;
1704 case OPT_fuse_linker_plugin:
1705 /* No-op. Used by the driver and passed to us because it starts with f.*/
1708 case OPT_Wuninitialized:
1709 /* Also turn on maybe uninitialized warning. */
1710 warn_maybe_uninitialized = value;
1714 /* If the flag was handled in a standard way, assume the lack of
1715 processing here is intentional. */
1716 gcc_assert (option_flag_var (scode, opts));
1723 /* Handle --param NAME=VALUE. */
1725 handle_param (struct gcc_options *opts, struct gcc_options *opts_set,
1726 location_t loc, const char *carg)
1731 arg = xstrdup (carg);
1732 equal = strchr (arg, '=');
1734 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE",
1738 value = integral_argument (equal + 1);
1740 error_at (loc, "invalid --param value %qs", equal + 1);
1744 set_param_value (arg, value,
1745 opts->x_param_values, opts_set->x_param_values);
1752 /* Used to set the level of strict aliasing warnings in OPTS,
1753 when no level is specified (i.e., when -Wstrict-aliasing, and not
1754 -Wstrict-aliasing=level was given).
1755 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1756 and 0 otherwise. After calling this function, wstrict_aliasing will be
1757 set to the default value of -Wstrict_aliasing=level, currently 3. */
1759 set_Wstrict_aliasing (struct gcc_options *opts, int onoff)
1761 gcc_assert (onoff == 0 || onoff == 1);
1763 opts->x_warn_strict_aliasing = 3;
1765 opts->x_warn_strict_aliasing = 0;
1768 /* The following routines are useful in setting all the flags that
1769 -ffast-math and -fno-fast-math imply. */
1771 set_fast_math_flags (struct gcc_options *opts, int set)
1773 if (!opts->frontend_set_flag_unsafe_math_optimizations)
1775 opts->x_flag_unsafe_math_optimizations = set;
1776 set_unsafe_math_optimizations_flags (opts, set);
1778 if (!opts->frontend_set_flag_finite_math_only)
1779 opts->x_flag_finite_math_only = set;
1780 if (!opts->frontend_set_flag_errno_math)
1781 opts->x_flag_errno_math = !set;
1784 if (!opts->frontend_set_flag_signaling_nans)
1785 opts->x_flag_signaling_nans = 0;
1786 if (!opts->frontend_set_flag_rounding_math)
1787 opts->x_flag_rounding_math = 0;
1788 if (!opts->frontend_set_flag_cx_limited_range)
1789 opts->x_flag_cx_limited_range = 1;
1793 /* When -funsafe-math-optimizations is set the following
1794 flags are set as well. */
1796 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
1798 if (!opts->frontend_set_flag_trapping_math)
1799 opts->x_flag_trapping_math = !set;
1800 if (!opts->frontend_set_flag_signed_zeros)
1801 opts->x_flag_signed_zeros = !set;
1802 if (!opts->frontend_set_flag_associative_math)
1803 opts->x_flag_associative_math = set;
1804 if (!opts->frontend_set_flag_reciprocal_math)
1805 opts->x_flag_reciprocal_math = set;
1808 /* Return true iff flags in OPTS are set as if -ffast-math. */
1810 fast_math_flags_set_p (const struct gcc_options *opts)
1812 return (!opts->x_flag_trapping_math
1813 && opts->x_flag_unsafe_math_optimizations
1814 && opts->x_flag_finite_math_only
1815 && !opts->x_flag_signed_zeros
1816 && !opts->x_flag_errno_math);
1819 /* Return true iff flags are set as if -ffast-math but using the flags stored
1820 in the struct cl_optimization structure. */
1822 fast_math_flags_struct_set_p (struct cl_optimization *opt)
1824 return (!opt->x_flag_trapping_math
1825 && opt->x_flag_unsafe_math_optimizations
1826 && opt->x_flag_finite_math_only
1827 && !opt->x_flag_signed_zeros
1828 && !opt->x_flag_errno_math);
1831 /* Handle a debug output -g switch for options OPTS
1832 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1833 explicitly), location LOC. EXTENDED is true or false to support
1834 extended output (2 is special and means "-ggdb" was given). */
1836 set_debug_level (enum debug_info_type type, int extended, const char *arg,
1837 struct gcc_options *opts, struct gcc_options *opts_set,
1840 opts->x_use_gnu_debug_info_extensions = extended;
1842 if (type == NO_DEBUG)
1844 if (opts->x_write_symbols == NO_DEBUG)
1846 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE;
1850 #ifdef DWARF2_DEBUGGING_INFO
1851 opts->x_write_symbols = DWARF2_DEBUG;
1852 #elif defined DBX_DEBUGGING_INFO
1853 opts->x_write_symbols = DBX_DEBUG;
1857 if (opts->x_write_symbols == NO_DEBUG)
1858 warning_at (loc, 0, "target system does not support debug output");
1863 /* Does it conflict with an already selected type? */
1864 if (opts_set->x_write_symbols != NO_DEBUG
1865 && opts->x_write_symbols != NO_DEBUG
1866 && type != opts->x_write_symbols)
1867 error_at (loc, "debug format \"%s\" conflicts with prior selection",
1868 debug_type_names[type]);
1869 opts->x_write_symbols = type;
1870 opts_set->x_write_symbols = type;
1873 /* A debug flag without a level defaults to level 2. */
1876 if (!opts->x_debug_info_level)
1877 opts->x_debug_info_level = DINFO_LEVEL_NORMAL;
1881 int argval = integral_argument (arg);
1883 error_at (loc, "unrecognised debug output level \"%s\"", arg);
1884 else if (argval > 3)
1885 error_at (loc, "debug output level %s is too high", arg);
1887 opts->x_debug_info_level = (enum debug_info_levels) argval;
1891 /* Arrange to dump core on error for diagnostic context DC. (The
1892 regular error message is still printed first, except in the case of
1896 setup_core_dumping (diagnostic_context *dc)
1899 signal (SIGABRT, SIG_DFL);
1901 #if defined(HAVE_SETRLIMIT)
1904 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
1905 fatal_error ("getting core file size maximum limit: %m");
1906 rlim.rlim_cur = rlim.rlim_max;
1907 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
1908 fatal_error ("setting core file size limit to maximum: %m");
1911 diagnostic_abort_on_error (dc);
1914 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1915 diagnostic context DC. */
1918 decode_d_option (const char *arg, struct gcc_options *opts,
1919 location_t loc, diagnostic_context *dc)
1927 opts->x_flag_debug_asm = 1;
1930 opts->x_flag_print_asm_name = 1;
1933 opts->x_flag_dump_rtl_in_asm = 1;
1934 opts->x_flag_print_asm_name = 1;
1937 opts->x_graph_dump_format = vcg;
1940 opts->x_rtl_dump_and_exit = 1;
1942 case 'D': /* These are handled by the preprocessor. */
1949 setup_core_dumping (dc);
1952 opts->x_flag_dump_all_passed = true;
1956 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c);
1961 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1962 mask LANG_MASK, option handlers HANDLERS) as an error for option
1963 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1964 NULL), location LOC. This is used by -Werror=. */
1967 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
1968 const struct cl_option_handlers *handlers,
1969 struct gcc_options *opts,
1970 struct gcc_options *opts_set,
1971 location_t loc, diagnostic_context *dc)
1976 new_option = XNEWVEC (char, strlen (arg) + 2);
1977 new_option[0] = 'W';
1978 strcpy (new_option + 1, arg);
1979 option_index = find_opt (new_option, lang_mask);
1980 if (option_index == OPT_SPECIAL_unknown)
1982 error_at (loc, "-Werror=%s: no option -%s", arg, new_option);
1986 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
1988 control_warning_option (option_index, (int) kind, value,
1990 handlers, opts, opts_set, dc);
1991 if (option_index == OPT_Wuninitialized)
1992 enable_warning_as_error ("maybe-uninitialized", value, lang_mask,
1993 handlers, opts, opts_set, loc, dc);
1998 /* Return malloced memory for the name of the option OPTION_INDEX
1999 which enabled a diagnostic (context CONTEXT), originally of type
2000 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2004 option_name (diagnostic_context *context, int option_index,
2005 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
2009 /* A warning classified as an error. */
2010 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
2011 && diag_kind == DK_ERROR)
2012 return concat (cl_options[OPT_Werror_].opt_text,
2013 /* Skip over "-W". */
2014 cl_options[option_index].opt_text + 2,
2016 /* A warning with option. */
2018 return xstrdup (cl_options[option_index].opt_text);
2020 /* A warning without option classified as an error. */
2021 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2022 || diag_kind == DK_WARNING)
2024 if (context->warning_as_error_requested)
2025 return xstrdup (cl_options[OPT_Werror].opt_text);
2027 return xstrdup (_("enabled by default"));