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 /* Use priority coloring if cover classes is not defined for the
294 if (targetm.ira_cover_classes == NULL)
295 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
297 /* Initialize whether `char' is signed. */
298 opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR;
299 /* Set this to a special "uninitialized" value. The actual default
300 is set after target options have been processed. */
301 opts->x_flag_short_enums = 2;
303 /* Initialize target_flags before targetm.target_option.optimization
304 so the latter can modify it. */
305 opts->x_target_flags = targetm.default_target_flags;
307 /* Some targets have ABI-specified unwind tables. */
308 opts->x_flag_unwind_tables = targetm.unwind_tables_default;
310 /* Some targets have other target-specific initialization. */
311 targetm.target_option.init_struct (opts);
314 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
315 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
316 OPTS_SET, diagnostic context DC, location LOC, with language mask
317 LANG_MASK and option handlers HANDLERS. */
320 maybe_default_option (struct gcc_options *opts,
321 struct gcc_options *opts_set,
322 const struct default_options *default_opt,
323 int level, bool size, bool fast,
324 unsigned int lang_mask,
325 const struct cl_option_handlers *handlers,
327 diagnostic_context *dc)
329 const struct cl_option *option = &cl_options[default_opt->opt_index];
333 gcc_assert (level == 2);
335 gcc_assert (level == 3);
337 switch (default_opt->levels)
343 case OPT_LEVELS_0_ONLY:
344 enabled = (level == 0);
347 case OPT_LEVELS_1_PLUS:
348 enabled = (level >= 1);
351 case OPT_LEVELS_1_PLUS_SPEED_ONLY:
352 enabled = (level >= 1 && !size);
355 case OPT_LEVELS_2_PLUS:
356 enabled = (level >= 2);
359 case OPT_LEVELS_2_PLUS_SPEED_ONLY:
360 enabled = (level >= 2 && !size);
363 case OPT_LEVELS_3_PLUS:
364 enabled = (level >= 3);
367 case OPT_LEVELS_3_PLUS_AND_SIZE:
368 enabled = (level >= 3 || size);
371 case OPT_LEVELS_SIZE:
375 case OPT_LEVELS_FAST:
379 case OPT_LEVELS_NONE:
385 handle_generated_option (opts, opts_set, default_opt->opt_index,
386 default_opt->arg, default_opt->value,
387 lang_mask, DK_UNSPECIFIED, loc,
389 else if (default_opt->arg == NULL
390 && !(option->flags & CL_REJECT_NEGATIVE))
391 handle_generated_option (opts, opts_set, default_opt->opt_index,
392 default_opt->arg, !default_opt->value,
393 lang_mask, DK_UNSPECIFIED, loc,
397 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
398 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
399 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
400 language mask LANG_MASK and option handlers HANDLERS. */
403 maybe_default_options (struct gcc_options *opts,
404 struct gcc_options *opts_set,
405 const struct default_options *default_opts,
406 int level, bool size, bool fast,
407 unsigned int lang_mask,
408 const struct cl_option_handlers *handlers,
410 diagnostic_context *dc)
414 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++)
415 maybe_default_option (opts, opts_set, &default_opts[i],
416 level, size, fast, lang_mask, handlers, loc, dc);
419 /* Table of options enabled by default at different levels. */
421 static const struct default_options default_options_table[] =
423 /* -O1 optimizations. */
424 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
426 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 },
428 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
429 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
430 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
431 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 },
432 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 },
433 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
434 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
435 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
436 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
437 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
438 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
439 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 },
440 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
441 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
442 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
443 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
444 { OPT_LEVELS_1_PLUS, OPT_ftree_sra, NULL, 1 },
445 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 },
446 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
447 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
448 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
449 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
450 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
451 { OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
453 /* -O2 optimizations. */
454 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
455 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
456 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
457 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
458 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
459 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
460 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
461 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
462 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
463 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
464 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
465 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
466 #ifdef INSN_SCHEDULING
467 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
468 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
469 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
471 { OPT_LEVELS_2_PLUS, OPT_fregmove, NULL, 1 },
472 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
473 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
474 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
475 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
476 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
477 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
478 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
479 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
480 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
481 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
482 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
483 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 },
484 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 },
485 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 },
486 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 },
488 /* -O3 optimizations. */
489 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
490 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
491 /* Inlining of functions reducing size is a good idea with -Os
492 regardless of them being declared inline. */
493 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
494 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
495 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
496 { OPT_LEVELS_3_PLUS, OPT_ftree_vectorize, NULL, 1 },
497 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
499 /* -Ofast adds optimizations to -O3. */
500 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
502 { OPT_LEVELS_NONE, 0, NULL, 0 }
505 /* Default the options in OPTS and OPTS_SET based on the optimization
506 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
508 default_options_optimization (struct gcc_options *opts,
509 struct gcc_options *opts_set,
510 struct cl_decoded_option *decoded_options,
511 unsigned int decoded_options_count,
513 unsigned int lang_mask,
514 const struct cl_option_handlers *handlers,
515 diagnostic_context *dc)
520 /* Scan to see what optimization level has been specified. That will
521 determine the default value of many flags. */
522 for (i = 1; i < decoded_options_count; i++)
524 struct cl_decoded_option *opt = &decoded_options[i];
525 switch (opt->opt_index)
528 if (*opt->arg == '\0')
530 opts->x_optimize = 1;
531 opts->x_optimize_size = 0;
532 opts->x_optimize_fast = 0;
536 const int optimize_val = integral_argument (opt->arg);
537 if (optimize_val == -1)
539 "argument to %qs should be a non-negative integer",
543 opts->x_optimize = optimize_val;
544 if ((unsigned int) opts->x_optimize > 255)
545 opts->x_optimize = 255;
546 opts->x_optimize_size = 0;
547 opts->x_optimize_fast = 0;
553 opts->x_optimize_size = 1;
555 /* Optimizing for size forces optimize to be 2. */
556 opts->x_optimize = 2;
557 opts->x_optimize_fast = 0;
561 /* -Ofast only adds flags to -O3. */
562 opts->x_optimize_size = 0;
563 opts->x_optimize = 3;
564 opts->x_optimize_fast = 1;
568 /* Ignore other options in this prescan. */
573 maybe_default_options (opts, opts_set, default_options_table,
574 opts->x_optimize, opts->x_optimize_size,
575 opts->x_optimize_fast, lang_mask, handlers, loc, dc);
577 /* -O2 param settings. */
578 opt2 = (opts->x_optimize >= 2);
580 /* Track fields in field-sensitive alias analysis. */
581 maybe_set_param_value
582 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
583 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE),
584 opts->x_param_values, opts_set->x_param_values);
586 /* For -O1 only do loop invariant motion for very small loops. */
587 maybe_set_param_value
588 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
589 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000,
590 opts->x_param_values, opts_set->x_param_values);
592 if (opts->x_optimize_size)
593 /* We want to crossjump as much as possible. */
594 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1,
595 opts->x_param_values, opts_set->x_param_values);
597 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS,
598 default_param_value (PARAM_MIN_CROSSJUMP_INSNS),
599 opts->x_param_values, opts_set->x_param_values);
601 /* Allow default optimizations to be specified on a per-machine basis. */
602 maybe_default_options (opts, opts_set,
603 targetm.target_option.optimization_table,
604 opts->x_optimize, opts->x_optimize_size,
605 opts->x_optimize_fast, lang_mask, handlers, loc, dc);
608 /* After all options at LOC have been read into OPTS and OPTS_SET,
609 finalize settings of those options and diagnose incompatible
612 finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
615 enum unwind_info_type ui_except;
617 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name))
619 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
620 OPTS->X_DUMP_DIR_NAME directory. Then try to make
621 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
622 directory, typically the directory to contain the object
624 if (opts->x_dump_dir_name)
625 opts->x_dump_base_name = concat (opts->x_dump_dir_name,
626 opts->x_dump_base_name, NULL);
627 else if (opts->x_aux_base_name
628 && strcmp (opts->x_aux_base_name, HOST_BIT_BUCKET) != 0)
630 const char *aux_base;
632 base_of_path (opts->x_aux_base_name, &aux_base);
633 if (opts->x_aux_base_name != aux_base)
635 int dir_len = aux_base - opts->x_aux_base_name;
636 char *new_dump_base_name =
637 XNEWVEC (char, strlen (opts->x_dump_base_name) + dir_len + 1);
639 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
640 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len);
641 /* Append existing OPTS->X_DUMP_BASE_NAME. */
642 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name);
643 opts->x_dump_base_name = new_dump_base_name;
648 /* Handle related options for unit-at-a-time, toplevel-reorder, and
650 if (!opts->x_flag_unit_at_a_time)
652 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
653 error_at (loc, "section anchors must be disabled when unit-at-a-time "
655 opts->x_flag_section_anchors = 0;
656 if (opts->x_flag_toplevel_reorder == 1)
657 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time "
659 opts->x_flag_toplevel_reorder = 0;
662 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
663 if (opts->x_warn_missing_noreturn)
664 opts->x_warn_suggest_attribute_noreturn = true;
666 /* Unless the user has asked for section anchors, we disable toplevel
667 reordering at -O0 to disable transformations that might be surprising
668 to end users and to get -fno-toplevel-reorder tested. */
669 if (!opts->x_optimize
670 && opts->x_flag_toplevel_reorder == 2
671 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors))
673 opts->x_flag_toplevel_reorder = 0;
674 opts->x_flag_section_anchors = 0;
676 if (!opts->x_flag_toplevel_reorder)
678 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
679 error_at (loc, "section anchors must be disabled when toplevel reorder"
681 opts->x_flag_section_anchors = 0;
684 if (!opts->x_flag_opts_finished)
686 if (opts->x_flag_pie)
687 opts->x_flag_pic = opts->x_flag_pie;
688 if (opts->x_flag_pic && !opts->x_flag_pie)
689 opts->x_flag_shlib = 1;
690 opts->x_flag_opts_finished = true;
693 if (opts->x_optimize == 0)
695 /* Inlining does not work if not optimizing,
696 so force it not to be done. */
697 opts->x_warn_inline = 0;
698 opts->x_flag_no_inline = 1;
701 /* The optimization to partition hot and cold basic blocks into separate
702 sections of the .o and executable files does not work (currently)
703 with exception handling. This is because there is no support for
704 generating unwind info. If opts->x_flag_exceptions is turned on
705 we need to turn off the partitioning optimization. */
707 ui_except = targetm.except_unwind_info (opts);
709 if (opts->x_flag_exceptions
710 && opts->x_flag_reorder_blocks_and_partition
711 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
714 "-freorder-blocks-and-partition does not work "
715 "with exceptions on this architecture");
716 opts->x_flag_reorder_blocks_and_partition = 0;
717 opts->x_flag_reorder_blocks = 1;
720 /* If user requested unwind info, then turn off the partitioning
723 if (opts->x_flag_unwind_tables
724 && !targetm.unwind_tables_default
725 && opts->x_flag_reorder_blocks_and_partition
726 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
729 "-freorder-blocks-and-partition does not support "
730 "unwind info on this architecture");
731 opts->x_flag_reorder_blocks_and_partition = 0;
732 opts->x_flag_reorder_blocks = 1;
735 /* If the target requested unwind info, then turn off the partitioning
736 optimization with a different message. Likewise, if the target does not
737 support named sections. */
739 if (opts->x_flag_reorder_blocks_and_partition
740 && (!targetm.have_named_sections
741 || (opts->x_flag_unwind_tables
742 && targetm.unwind_tables_default
743 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))))
746 "-freorder-blocks-and-partition does not work "
747 "on this architecture");
748 opts->x_flag_reorder_blocks_and_partition = 0;
749 opts->x_flag_reorder_blocks = 1;
752 if (opts->x_flag_reorder_blocks_and_partition
753 && !opts_set->x_flag_reorder_functions)
754 opts->x_flag_reorder_functions = 1;
756 /* Pipelining of outer loops is only possible when general pipelining
757 capabilities are requested. */
758 if (!opts->x_flag_sel_sched_pipelining)
759 opts->x_flag_sel_sched_pipelining_outer_loops = 0;
761 if (!targetm.ira_cover_classes
762 && opts->x_flag_ira_algorithm == IRA_ALGORITHM_CB)
765 "-fira-algorithm=CB does not work on this architecture");
766 opts->x_flag_ira_algorithm = IRA_ALGORITHM_PRIORITY;
769 if (opts->x_flag_conserve_stack)
771 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100,
772 opts->x_param_values, opts_set->x_param_values);
773 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40,
774 opts->x_param_values, opts_set->x_param_values);
776 if (opts->x_flag_wpa || opts->x_flag_ltrans)
778 /* These passes are not WHOPR compatible yet. */
779 opts->x_flag_ipa_pta = 0;
782 if (opts->x_flag_lto)
785 opts->x_flag_generate_lto = 1;
787 /* When generating IL, do not operate in whole-program mode.
788 Otherwise, symbols will be privatized too early, causing link
790 opts->x_flag_whole_program = 0;
792 error_at (loc, "LTO support has not been enabled in this configuration");
795 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
796 + (opts->x_flag_lto_partition_none != 0) >= 1)
798 if ((opts->x_flag_lto_partition_balanced != 0)
799 + (opts->x_flag_lto_partition_1to1 != 0)
800 + (opts->x_flag_lto_partition_none != 0) > 1)
801 error_at (loc, "only one -flto-partition value can be specified");
804 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
805 default value if they choose based on other options. */
806 if (opts->x_flag_split_stack == -1)
807 opts->x_flag_split_stack = 0;
808 else if (opts->x_flag_split_stack)
810 if (!targetm.supports_split_stack (true, opts))
812 error_at (loc, "%<-fsplit-stack%> is not supported by "
813 "this compiler configuration");
814 opts->x_flag_split_stack = 0;
819 #define LEFT_COLUMN 27
821 /* Output ITEM, of length ITEM_WIDTH, in the left column,
822 followed by word-wrapped HELP in a second column. */
824 wrap_help (const char *help,
826 unsigned int item_width,
827 unsigned int columns)
829 unsigned int col_width = LEFT_COLUMN;
830 unsigned int remaining, room, len;
832 remaining = strlen (help);
836 room = columns - 3 - MAX (col_width, item_width);
845 for (i = 0; help[i]; i++)
847 if (i >= room && len != remaining)
851 else if ((help[i] == '-' || help[i] == '/')
852 && help[i + 1] != ' '
853 && i > 0 && ISALPHA (help[i - 1]))
858 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
860 while (help[len] == ' ')
868 /* Print help for a specific front-end, etc. */
870 print_filtered_help (unsigned int include_flags,
871 unsigned int exclude_flags,
872 unsigned int any_flags,
873 unsigned int columns,
874 struct gcc_options *opts,
875 unsigned int lang_mask)
880 bool displayed = false;
882 if (include_flags == CL_PARAMS)
884 for (i = 0; i < LAST_PARAM; i++)
886 const char *param = compiler_params[i].option;
888 help = compiler_params[i].help;
889 if (help == NULL || *help == '\0')
891 if (exclude_flags & CL_UNDOCUMENTED)
893 help = undocumented_msg;
896 /* Get the translation. */
899 wrap_help (help, param, strlen (param), columns);
905 if (!opts->x_help_printed)
906 opts->x_help_printed = XCNEWVAR (char, cl_options_count);
908 if (!opts->x_help_enum_printed)
909 opts->x_help_enum_printed = XCNEWVAR (char, cl_enums_count);
911 for (i = 0; i < cl_options_count; i++)
914 const struct cl_option *option = cl_options + i;
919 if (include_flags == 0
920 || ((option->flags & include_flags) != include_flags))
922 if ((option->flags & any_flags) == 0)
926 /* Skip unwanted switches. */
927 if ((option->flags & exclude_flags) != 0)
930 /* The driver currently prints its own help text. */
931 if ((option->flags & CL_DRIVER) != 0
932 && (option->flags & (((1U << cl_lang_count) - 1)
933 | CL_COMMON | CL_TARGET)) == 0)
937 /* Skip switches that have already been printed. */
938 if (opts->x_help_printed[i])
941 opts->x_help_printed[i] = true;
946 if (exclude_flags & CL_UNDOCUMENTED)
948 help = undocumented_msg;
951 /* Get the translation. */
954 /* Find the gap between the name of the
955 option and its descriptive text. */
956 tab = strchr (help, '\t');
965 opt = option->opt_text;
969 /* With the -Q option enabled we change the descriptive text associated
970 with an option to be an indication of its current setting. */
973 void *flag_var = option_flag_var (i, opts);
975 if (len < (LEFT_COLUMN + 2))
976 strcpy (new_help, "\t\t");
978 strcpy (new_help, "\t");
981 && option->var_type != CLVC_DEFER)
983 if (option->flags & CL_JOINED)
985 if (option->var_type == CLVC_STRING)
987 if (* (const char **) flag_var != NULL)
988 snprintf (new_help + strlen (new_help),
989 sizeof (new_help) - strlen (new_help),
990 * (const char **) flag_var);
992 else if (option->var_type == CLVC_ENUM)
994 const struct cl_enum *e = &cl_enums[option->var_enum];
996 const char *arg = NULL;
998 value = e->get (flag_var);
999 enum_value_to_arg (e->values, &arg, value, lang_mask);
1001 arg = _("[default]");
1002 snprintf (new_help + strlen (new_help),
1003 sizeof (new_help) - strlen (new_help),
1007 sprintf (new_help + strlen (new_help),
1008 "%#x", * (int *) flag_var);
1011 strcat (new_help, option_enabled (i, opts)
1012 ? _("[enabled]") : _("[disabled]"));
1018 wrap_help (help, opt, len, columns);
1021 if (option->var_type == CLVC_ENUM
1022 && opts->x_help_enum_printed[option->var_enum] != 2)
1023 opts->x_help_enum_printed[option->var_enum] = 1;
1028 unsigned int langs = include_flags & CL_LANG_ALL;
1031 printf (_(" No options with the desired characteristics were found\n"));
1036 /* PR 31349: Tell the user how to see all of the
1037 options supported by a specific front end. */
1038 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1039 if ((1U << i) & langs)
1040 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1041 lang_names[i], lang_names[i]);
1045 else if (! displayed)
1046 printf (_(" All options with the desired characteristics have already been displayed\n"));
1050 /* Print details of enumerated option arguments, if those
1051 enumerations have help text headings provided. If no help text
1052 is provided, presume that the possible values are listed in the
1053 help text for the relevant options. */
1054 for (i = 0; i < cl_enums_count; i++)
1056 unsigned int j, pos;
1058 if (opts->x_help_enum_printed[i] != 1)
1060 if (cl_enums[i].help == NULL)
1062 printf (" %s\n ", _(cl_enums[i].help));
1064 for (j = 0; cl_enums[i].values[j].arg != NULL; j++)
1066 unsigned int len = strlen (cl_enums[i].values[j].arg);
1068 if (pos > 4 && pos + 1 + len <= columns)
1070 printf (" %s", cl_enums[i].values[j].arg);
1080 printf ("%s", cl_enums[i].values[j].arg);
1085 opts->x_help_enum_printed[i] = 2;
1089 /* Display help for a specified type of option.
1090 The options must have ALL of the INCLUDE_FLAGS set
1091 ANY of the flags in the ANY_FLAGS set
1092 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1093 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1095 print_specific_help (unsigned int include_flags,
1096 unsigned int exclude_flags,
1097 unsigned int any_flags,
1098 struct gcc_options *opts,
1099 unsigned int lang_mask)
1101 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1102 const char * description = NULL;
1103 const char * descrip_extra = "";
1107 /* Sanity check: Make sure that we do not have more
1108 languages than we have bits available to enumerate them. */
1109 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1111 /* If we have not done so already, obtain
1112 the desired maximum width of the output. */
1113 if (opts->x_help_columns == 0)
1117 p = getenv ("COLUMNS");
1120 int value = atoi (p);
1123 opts->x_help_columns = value;
1126 if (opts->x_help_columns == 0)
1127 /* Use a reasonable default. */
1128 opts->x_help_columns = 80;
1131 /* Decide upon the title for the options that we are going to display. */
1132 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1134 switch (flag & include_flags)
1141 description = _("The following options are target specific");
1144 description = _("The following options control compiler warning messages");
1146 case CL_OPTIMIZATION:
1147 description = _("The following options control optimizations");
1150 description = _("The following options are language-independent");
1153 description = _("The --param option recognizes the following as parameters");
1156 if (i >= cl_lang_count)
1158 if (exclude_flags & all_langs_mask)
1159 description = _("The following options are specific to just the language ");
1161 description = _("The following options are supported by the language ");
1162 descrip_extra = lang_names [i];
1167 if (description == NULL)
1171 if (include_flags & CL_UNDOCUMENTED)
1172 description = _("The following options are not documented");
1173 else if (include_flags & CL_SEPARATE)
1174 description = _("The following options take separate arguments");
1175 else if (include_flags & CL_JOINED)
1176 description = _("The following options take joined arguments");
1179 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1186 if (any_flags & all_langs_mask)
1187 description = _("The following options are language-related");
1189 description = _("The following options are language-independent");
1193 printf ("%s%s:\n", description, descrip_extra);
1194 print_filtered_help (include_flags, exclude_flags, any_flags,
1195 opts->x_help_columns, opts, lang_mask);
1198 /* Handle target- and language-independent options. Return zero to
1199 generate an "unknown option" message. Only options that need
1200 extra handling need to be listed here; if you simply want
1201 DECODED->value assigned to a variable, it happens automatically. */
1204 common_handle_option (struct gcc_options *opts,
1205 struct gcc_options *opts_set,
1206 const struct cl_decoded_option *decoded,
1207 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1209 const struct cl_option_handlers *handlers,
1210 diagnostic_context *dc)
1212 size_t scode = decoded->opt_index;
1213 const char *arg = decoded->arg;
1214 int value = decoded->value;
1215 enum opt_code code = (enum opt_code) scode;
1217 gcc_assert (decoded->canonical_option_num_elements <= 2);
1222 handle_param (opts, opts_set, loc, arg);
1227 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1228 unsigned int undoc_mask;
1231 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings)
1234 /* First display any single language specific options. */
1235 for (i = 0; i < cl_lang_count; i++)
1237 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts,
1239 /* Next display any multi language specific options. */
1240 print_specific_help (0, undoc_mask, all_langs_mask, opts, lang_mask);
1241 /* Then display any remaining, non-language options. */
1242 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1244 print_specific_help (i, undoc_mask, 0, opts, lang_mask);
1245 opts->x_exit_after_options = true;
1249 case OPT__target_help:
1250 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts, lang_mask);
1251 opts->x_exit_after_options = true;
1253 /* Allow the target a chance to give the user some additional information. */
1260 const char * a = arg;
1261 unsigned int include_flags = 0;
1262 /* Note - by default we include undocumented options when listing
1263 specific classes. If you only want to see documented options
1264 then add ",^undocumented" to the --help= option. E.g.:
1266 --help=target,^undocumented */
1267 unsigned int exclude_flags = 0;
1269 /* Walk along the argument string, parsing each word in turn.
1271 arg = [^]{word}[,{arg}]
1272 word = {optimizers|target|warnings|undocumented|
1273 params|common|<language>} */
1278 const char * string;
1283 { "optimizers", CL_OPTIMIZATION },
1284 { "target", CL_TARGET },
1285 { "warnings", CL_WARNING },
1286 { "undocumented", CL_UNDOCUMENTED },
1287 { "params", CL_PARAMS },
1288 { "joined", CL_JOINED },
1289 { "separate", CL_SEPARATE },
1290 { "common", CL_COMMON },
1293 unsigned int * pflags;
1295 unsigned int lang_flag, specific_flag;
1302 pflags = & exclude_flags;
1305 pflags = & include_flags;
1307 comma = strchr (a, ',');
1318 /* Check to see if the string matches an option class name. */
1319 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1320 if (strncasecmp (a, specifics[i].string, len) == 0)
1322 specific_flag = specifics[i].flag;
1326 /* Check to see if the string matches a language name.
1327 Note - we rely upon the alpha-sorted nature of the entries in
1328 the lang_names array, specifically that shorter names appear
1329 before their longer variants. (i.e. C before C++). That way
1330 when we are attempting to match --help=c for example we will
1331 match with C first and not C++. */
1332 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1333 if (strncasecmp (a, lang_names[i], len) == 0)
1335 lang_flag = 1U << i;
1339 if (specific_flag != 0)
1342 * pflags |= specific_flag;
1345 /* The option's argument matches both the start of a
1346 language name and the start of an option class name.
1347 We have a special case for when the user has
1348 specified "--help=c", but otherwise we have to issue
1350 if (strncasecmp (a, "c", len) == 0)
1351 * pflags |= lang_flag;
1354 "--help argument %q.*s is ambiguous, "
1355 "please be more specific",
1359 else if (lang_flag != 0)
1360 * pflags |= lang_flag;
1363 "unrecognized argument to --help= option: %q.*s",
1372 print_specific_help (include_flags, exclude_flags, 0, opts,
1374 opts->x_exit_after_options = true;
1379 opts->x_exit_after_options = true;
1385 /* Currently handled in a prescan. */
1389 enable_warning_as_error (arg, value, lang_mask, handlers,
1390 opts, opts_set, loc, dc);
1393 case OPT_Wlarger_than_:
1394 opts->x_larger_than_size = value;
1395 opts->x_warn_larger_than = value != -1;
1398 case OPT_Wfatal_errors:
1399 dc->fatal_errors = value;
1402 case OPT_Wframe_larger_than_:
1403 opts->x_frame_larger_than_size = value;
1404 opts->x_warn_frame_larger_than = value != -1;
1407 case OPT_Wstrict_aliasing:
1408 set_Wstrict_aliasing (opts, value);
1411 case OPT_Wstrict_overflow:
1412 opts->x_warn_strict_overflow = (value
1413 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1417 case OPT_Wsystem_headers:
1418 dc->dc_warn_system_headers = value;
1422 opts->x_flag_gen_aux_info = 1;
1425 case OPT_auxbase_strip:
1427 char *tmp = xstrdup (arg);
1428 strip_off_ending (tmp, strlen (tmp));
1430 opts->x_aux_base_name = tmp;
1435 decode_d_option (arg, opts, loc, dc);
1438 case OPT_fcall_used_:
1439 case OPT_fcall_saved_:
1444 case OPT_fdbg_cnt_list:
1448 case OPT_fdebug_prefix_map_:
1452 case OPT_fdiagnostics_show_location_:
1453 diagnostic_prefixing_rule (dc) = (diagnostic_prefixing_rule_t) value;
1456 case OPT_fdiagnostics_show_option:
1457 dc->show_option_requested = value;
1464 case OPT_ffast_math:
1465 set_fast_math_flags (opts, value);
1468 case OPT_funsafe_math_optimizations:
1469 set_unsafe_math_optimizations_flags (opts, value);
1476 case OPT_finline_limit_:
1477 set_param_value ("max-inline-insns-single", value / 2,
1478 opts->x_param_values, opts_set->x_param_values);
1479 set_param_value ("max-inline-insns-auto", value / 2,
1480 opts->x_param_values, opts_set->x_param_values);
1483 case OPT_finstrument_functions_exclude_function_list_:
1484 add_comma_separated_to_vector
1485 (&opts->x_flag_instrument_functions_exclude_functions, arg);
1488 case OPT_finstrument_functions_exclude_file_list_:
1489 add_comma_separated_to_vector
1490 (&opts->x_flag_instrument_functions_exclude_files, arg);
1493 case OPT_fmessage_length_:
1494 pp_set_line_maximum_length (dc->printer, value);
1497 case OPT_fpack_struct_:
1498 if (value <= 0 || (value & (value - 1)) || value > 16)
1500 "structure alignment must be a small power of two, not %d",
1503 opts->x_initial_max_fld_align = value;
1507 case OPT_fplugin_arg_:
1511 case OPT_fprofile_use_:
1512 opts->x_profile_data_prefix = xstrdup (arg);
1513 opts->x_flag_profile_use = true;
1515 /* No break here - do -fprofile-use processing. */
1516 case OPT_fprofile_use:
1517 if (!opts_set->x_flag_branch_probabilities)
1518 opts->x_flag_branch_probabilities = value;
1519 if (!opts_set->x_flag_profile_values)
1520 opts->x_flag_profile_values = value;
1521 if (!opts_set->x_flag_unroll_loops)
1522 opts->x_flag_unroll_loops = value;
1523 if (!opts_set->x_flag_peel_loops)
1524 opts->x_flag_peel_loops = value;
1525 if (!opts_set->x_flag_tracer)
1526 opts->x_flag_tracer = value;
1527 if (!opts_set->x_flag_value_profile_transformations)
1528 opts->x_flag_value_profile_transformations = value;
1529 if (!opts_set->x_flag_inline_functions)
1530 opts->x_flag_inline_functions = value;
1531 if (!opts_set->x_flag_ipa_cp)
1532 opts->x_flag_ipa_cp = value;
1533 if (!opts_set->x_flag_ipa_cp_clone
1534 && value && opts->x_flag_ipa_cp)
1535 opts->x_flag_ipa_cp_clone = value;
1536 if (!opts_set->x_flag_predictive_commoning)
1537 opts->x_flag_predictive_commoning = value;
1538 if (!opts_set->x_flag_unswitch_loops)
1539 opts->x_flag_unswitch_loops = value;
1540 if (!opts_set->x_flag_gcse_after_reload)
1541 opts->x_flag_gcse_after_reload = value;
1544 case OPT_fprofile_generate_:
1545 opts->x_profile_data_prefix = xstrdup (arg);
1547 /* No break here - do -fprofile-generate processing. */
1548 case OPT_fprofile_generate:
1549 if (!opts_set->x_profile_arc_flag)
1550 opts->x_profile_arc_flag = value;
1551 if (!opts_set->x_flag_profile_values)
1552 opts->x_flag_profile_values = value;
1553 if (!opts_set->x_flag_value_profile_transformations)
1554 opts->x_flag_value_profile_transformations = value;
1555 if (!opts_set->x_flag_inline_functions)
1556 opts->x_flag_inline_functions = value;
1557 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1558 quadratic. Disable the pass until better memory representation
1560 if (!opts_set->x_flag_ipa_reference && in_lto_p)
1561 opts->x_flag_ipa_reference = false;
1564 case OPT_fshow_column:
1565 dc->show_column = value;
1568 case OPT_frandom_seed:
1569 /* The real switch is -fno-random-seed. */
1575 case OPT_frandom_seed_:
1579 case OPT_fsched_verbose_:
1580 #ifdef INSN_SCHEDULING
1581 /* Handled with Var in common.opt. */
1587 case OPT_fsched_stalled_insns_:
1588 opts->x_flag_sched_stalled_insns = value;
1589 if (opts->x_flag_sched_stalled_insns == 0)
1590 opts->x_flag_sched_stalled_insns = -1;
1593 case OPT_fsched_stalled_insns_dep_:
1594 opts->x_flag_sched_stalled_insns_dep = value;
1597 case OPT_fstack_check_:
1598 if (!strcmp (arg, "no"))
1599 opts->x_flag_stack_check = NO_STACK_CHECK;
1600 else if (!strcmp (arg, "generic"))
1601 /* This is the old stack checking method. */
1602 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1603 ? FULL_BUILTIN_STACK_CHECK
1604 : GENERIC_STACK_CHECK;
1605 else if (!strcmp (arg, "specific"))
1606 /* This is the new stack checking method. */
1607 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1608 ? FULL_BUILTIN_STACK_CHECK
1609 : STACK_CHECK_STATIC_BUILTIN
1610 ? STATIC_BUILTIN_STACK_CHECK
1611 : GENERIC_STACK_CHECK;
1613 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg);
1616 case OPT_fstack_limit:
1617 /* The real switch is -fno-stack-limit. */
1623 case OPT_fstack_limit_register_:
1624 case OPT_fstack_limit_symbol_:
1628 case OPT_ftree_vectorizer_verbose_:
1629 vect_set_verbosity_level (opts, value);
1633 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set,
1638 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
1642 if (value < 2 || value > 4)
1643 error_at (loc, "dwarf version %d is not supported", value);
1645 dwarf_version = value;
1646 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc);
1650 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
1655 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,
1660 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc);
1665 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set,
1669 case OPT_pedantic_errors:
1670 opts->x_pedantic = 1;
1671 dc->pedantic_errors = 1;
1675 opts->x_flag_lto = value ? "" : NULL;
1679 dc->dc_inhibit_warnings = true;
1682 case OPT_fmax_errors_:
1683 dc->max_errors = value;
1686 case OPT_fuse_linker_plugin:
1687 /* No-op. Used by the driver and passed to us because it starts with f.*/
1691 /* If the flag was handled in a standard way, assume the lack of
1692 processing here is intentional. */
1693 gcc_assert (option_flag_var (scode, opts));
1700 /* Handle --param NAME=VALUE. */
1702 handle_param (struct gcc_options *opts, struct gcc_options *opts_set,
1703 location_t loc, const char *carg)
1708 arg = xstrdup (carg);
1709 equal = strchr (arg, '=');
1711 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE",
1715 value = integral_argument (equal + 1);
1717 error_at (loc, "invalid --param value %qs", equal + 1);
1721 set_param_value (arg, value,
1722 opts->x_param_values, opts_set->x_param_values);
1729 /* Used to set the level of strict aliasing warnings in OPTS,
1730 when no level is specified (i.e., when -Wstrict-aliasing, and not
1731 -Wstrict-aliasing=level was given).
1732 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1733 and 0 otherwise. After calling this function, wstrict_aliasing will be
1734 set to the default value of -Wstrict_aliasing=level, currently 3. */
1736 set_Wstrict_aliasing (struct gcc_options *opts, int onoff)
1738 gcc_assert (onoff == 0 || onoff == 1);
1740 opts->x_warn_strict_aliasing = 3;
1742 opts->x_warn_strict_aliasing = 0;
1745 /* The following routines are useful in setting all the flags that
1746 -ffast-math and -fno-fast-math imply. */
1748 set_fast_math_flags (struct gcc_options *opts, int set)
1750 if (!opts->frontend_set_flag_unsafe_math_optimizations)
1752 opts->x_flag_unsafe_math_optimizations = set;
1753 set_unsafe_math_optimizations_flags (opts, set);
1755 if (!opts->frontend_set_flag_finite_math_only)
1756 opts->x_flag_finite_math_only = set;
1757 if (!opts->frontend_set_flag_errno_math)
1758 opts->x_flag_errno_math = !set;
1761 if (!opts->frontend_set_flag_signaling_nans)
1762 opts->x_flag_signaling_nans = 0;
1763 if (!opts->frontend_set_flag_rounding_math)
1764 opts->x_flag_rounding_math = 0;
1765 if (!opts->frontend_set_flag_cx_limited_range)
1766 opts->x_flag_cx_limited_range = 1;
1770 /* When -funsafe-math-optimizations is set the following
1771 flags are set as well. */
1773 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
1775 if (!opts->frontend_set_flag_trapping_math)
1776 opts->x_flag_trapping_math = !set;
1777 if (!opts->frontend_set_flag_signed_zeros)
1778 opts->x_flag_signed_zeros = !set;
1779 if (!opts->frontend_set_flag_associative_math)
1780 opts->x_flag_associative_math = set;
1781 if (!opts->frontend_set_flag_reciprocal_math)
1782 opts->x_flag_reciprocal_math = set;
1785 /* Return true iff flags in OPTS are set as if -ffast-math. */
1787 fast_math_flags_set_p (const struct gcc_options *opts)
1789 return (!opts->x_flag_trapping_math
1790 && opts->x_flag_unsafe_math_optimizations
1791 && opts->x_flag_finite_math_only
1792 && !opts->x_flag_signed_zeros
1793 && !opts->x_flag_errno_math);
1796 /* Return true iff flags are set as if -ffast-math but using the flags stored
1797 in the struct cl_optimization structure. */
1799 fast_math_flags_struct_set_p (struct cl_optimization *opt)
1801 return (!opt->x_flag_trapping_math
1802 && opt->x_flag_unsafe_math_optimizations
1803 && opt->x_flag_finite_math_only
1804 && !opt->x_flag_signed_zeros
1805 && !opt->x_flag_errno_math);
1808 /* Handle a debug output -g switch for options OPTS
1809 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1810 explicitly), location LOC. EXTENDED is true or false to support
1811 extended output (2 is special and means "-ggdb" was given). */
1813 set_debug_level (enum debug_info_type type, int extended, const char *arg,
1814 struct gcc_options *opts, struct gcc_options *opts_set,
1817 opts->x_use_gnu_debug_info_extensions = extended;
1819 if (type == NO_DEBUG)
1821 if (opts->x_write_symbols == NO_DEBUG)
1823 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE;
1827 #ifdef DWARF2_DEBUGGING_INFO
1828 opts->x_write_symbols = DWARF2_DEBUG;
1829 #elif defined DBX_DEBUGGING_INFO
1830 opts->x_write_symbols = DBX_DEBUG;
1834 if (opts->x_write_symbols == NO_DEBUG)
1835 warning_at (loc, 0, "target system does not support debug output");
1840 /* Does it conflict with an already selected type? */
1841 if (opts_set->x_write_symbols != NO_DEBUG
1842 && opts->x_write_symbols != NO_DEBUG
1843 && type != opts->x_write_symbols)
1844 error_at (loc, "debug format \"%s\" conflicts with prior selection",
1845 debug_type_names[type]);
1846 opts->x_write_symbols = type;
1847 opts_set->x_write_symbols = type;
1850 /* A debug flag without a level defaults to level 2. */
1853 if (!opts->x_debug_info_level)
1854 opts->x_debug_info_level = DINFO_LEVEL_NORMAL;
1858 int argval = integral_argument (arg);
1860 error_at (loc, "unrecognised debug output level \"%s\"", arg);
1861 else if (argval > 3)
1862 error_at (loc, "debug output level %s is too high", arg);
1864 opts->x_debug_info_level = (enum debug_info_levels) argval;
1868 /* Arrange to dump core on error for diagnostic context DC. (The
1869 regular error message is still printed first, except in the case of
1873 setup_core_dumping (diagnostic_context *dc)
1876 signal (SIGABRT, SIG_DFL);
1878 #if defined(HAVE_SETRLIMIT)
1881 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
1882 fatal_error ("getting core file size maximum limit: %m");
1883 rlim.rlim_cur = rlim.rlim_max;
1884 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
1885 fatal_error ("setting core file size limit to maximum: %m");
1888 diagnostic_abort_on_error (dc);
1891 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1892 diagnostic context DC. */
1895 decode_d_option (const char *arg, struct gcc_options *opts,
1896 location_t loc, diagnostic_context *dc)
1904 opts->x_flag_debug_asm = 1;
1907 opts->x_flag_print_asm_name = 1;
1910 opts->x_flag_dump_rtl_in_asm = 1;
1911 opts->x_flag_print_asm_name = 1;
1914 opts->x_graph_dump_format = vcg;
1917 opts->x_rtl_dump_and_exit = 1;
1919 case 'D': /* These are handled by the preprocessor. */
1926 setup_core_dumping (dc);
1929 opts->x_flag_dump_all_passed = true;
1933 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c);
1938 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1939 mask LANG_MASK, option handlers HANDLERS) as an error for option
1940 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1941 NULL), location LOC. This is used by -Werror=. */
1944 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
1945 const struct cl_option_handlers *handlers,
1946 struct gcc_options *opts,
1947 struct gcc_options *opts_set,
1948 location_t loc, diagnostic_context *dc)
1953 new_option = XNEWVEC (char, strlen (arg) + 2);
1954 new_option[0] = 'W';
1955 strcpy (new_option + 1, arg);
1956 option_index = find_opt (new_option, lang_mask);
1957 if (option_index == OPT_SPECIAL_unknown)
1959 error_at (loc, "-Werror=%s: no option -%s", arg, new_option);
1963 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
1965 control_warning_option (option_index, (int) kind, value,
1967 handlers, opts, opts_set, dc);
1972 /* Return malloced memory for the name of the option OPTION_INDEX
1973 which enabled a diagnostic (context CONTEXT), originally of type
1974 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1978 option_name (diagnostic_context *context, int option_index,
1979 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
1983 /* A warning classified as an error. */
1984 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
1985 && diag_kind == DK_ERROR)
1986 return concat (cl_options[OPT_Werror_].opt_text,
1987 /* Skip over "-W". */
1988 cl_options[option_index].opt_text + 2,
1990 /* A warning with option. */
1992 return xstrdup (cl_options[option_index].opt_text);
1994 /* A warning without option classified as an error. */
1995 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
1996 || diag_kind == DK_WARNING)
1998 if (context->warning_as_error_requested)
1999 return xstrdup (cl_options[OPT_Werror].opt_text);
2001 return xstrdup (_("enabled by default"));