1 /* Command line option handling.
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "diagnostic.h"
30 #include "opts-diagnostic.h"
31 #include "insn-attr-common.h"
32 #include "common/common-target.h"
33 #include "spellcheck.h"
35 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
37 /* Indexed by enum debug_info_type. */
38 const char *const debug_type_names
[] =
40 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
43 /* Parse the -femit-struct-debug-detailed option value
44 and set the flag variables. */
46 #define MATCH( prefix, string ) \
47 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
48 ? ((string += sizeof prefix - 1), 1) : 0)
51 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
54 /* various labels for comparison */
55 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
56 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
57 static const char none_lbl
[] = "none", any_lbl
[] = "any";
58 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
60 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
61 /* Default is to apply to as much as possible. */
62 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
66 if (MATCH (dfn_lbl
, spec
))
67 usage
= DINFO_USAGE_DFN
;
68 else if (MATCH (dir_lbl
, spec
))
69 usage
= DINFO_USAGE_DIR_USE
;
70 else if (MATCH (ind_lbl
, spec
))
71 usage
= DINFO_USAGE_IND_USE
;
73 /* Generics or not? */
74 if (MATCH (ord_lbl
, spec
))
76 else if (MATCH (gen_lbl
, spec
))
79 /* What allowable environment? */
80 if (MATCH (none_lbl
, spec
))
81 files
= DINFO_STRUCT_FILE_NONE
;
82 else if (MATCH (any_lbl
, spec
))
83 files
= DINFO_STRUCT_FILE_ANY
;
84 else if (MATCH (sys_lbl
, spec
))
85 files
= DINFO_STRUCT_FILE_SYS
;
86 else if (MATCH (base_lbl
, spec
))
87 files
= DINFO_STRUCT_FILE_BASE
;
90 "argument %qs to %<-femit-struct-debug-detailed%> "
94 /* Effect the specification. */
95 if (usage
== DINFO_USAGE_NUM_ENUMS
)
99 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
101 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
105 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
107 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
113 opts
->x_debug_struct_ordinary
[usage
] = files
;
115 opts
->x_debug_struct_generic
[usage
] = files
;
119 set_struct_debug_option (opts
, loc
, spec
+1);
122 /* No more -femit-struct-debug-detailed specifications.
126 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
128 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
129 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
130 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
131 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
133 "%<-femit-struct-debug-detailed=dir:...%> must allow "
134 "at least as much as "
135 "%<-femit-struct-debug-detailed=ind:...%>");
139 /* Strip off a legitimate source ending from the input string NAME of
140 length LEN. Rather than having to know the names used by all of
141 our front ends, we strip off an ending of a period followed by
142 up to fource characters. (C++ uses ".cpp".) */
145 strip_off_ending (char *name
, int len
)
148 for (i
= 2; i
< 5 && len
> i
; i
++)
150 if (name
[len
- i
] == '.')
152 name
[len
- i
] = '\0';
158 /* Find the base name of a path, stripping off both directories and
159 a single final extension. */
161 base_of_path (const char *path
, const char **base_out
)
163 const char *base
= path
;
165 const char *p
= path
;
169 if (IS_DIR_SEPARATOR (c
))
184 /* What to print when a switch has no documentation. */
185 static const char undocumented_msg
[] = N_("This option lacks documentation.");
186 static const char use_diagnosed_msg
[] = N_("Uses of this option are diagnosed.");
188 typedef char *char_p
; /* For DEF_VEC_P. */
190 static void handle_param (struct gcc_options
*opts
,
191 struct gcc_options
*opts_set
, location_t loc
,
193 static void set_debug_level (enum debug_info_type type
, int extended
,
194 const char *arg
, struct gcc_options
*opts
,
195 struct gcc_options
*opts_set
,
197 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
198 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
199 location_t loc
, diagnostic_context
*dc
);
200 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
202 static void enable_warning_as_error (const char *arg
, int value
,
203 unsigned int lang_mask
,
204 const struct cl_option_handlers
*handlers
,
205 struct gcc_options
*opts
,
206 struct gcc_options
*opts_set
,
208 diagnostic_context
*dc
);
210 /* Handle a back-end option; arguments and return value as for
214 target_handle_option (struct gcc_options
*opts
,
215 struct gcc_options
*opts_set
,
216 const struct cl_decoded_option
*decoded
,
217 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
219 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
220 diagnostic_context
*dc
)
222 gcc_assert (dc
== global_dc
);
223 gcc_assert (kind
== DK_UNSPECIFIED
);
224 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
227 /* Add comma-separated strings to a char_p vector. */
230 add_comma_separated_to_vector (void **pvec
, const char *arg
)
236 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
238 vec_check_alloc (v
, 1);
240 /* We never free this string. */
253 v
->safe_push (token_start
);
256 if (*r
== '\\' && r
[1] == ',')
264 if (*token_start
!= '\0')
265 v
->safe_push (token_start
);
270 /* Initialize opts_obstack. */
273 init_opts_obstack (void)
275 gcc_obstack_init (&opts_obstack
);
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 /* Ensure that opts_obstack has already been initialized by the time
286 that we initialize any gcc_options instances (PR jit/68446). */
287 gcc_assert (opts_obstack
.chunk_size
> 0);
289 *opts
= global_options_init
;
292 memset (opts_set
, 0, sizeof (*opts_set
));
294 opts
->x_param_values
= XNEWVEC (int, num_params
);
297 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
299 init_param_values (opts
->x_param_values
);
301 /* Initialize whether `char' is signed. */
302 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
303 /* Set this to a special "uninitialized" value. The actual default
304 is set after target options have been processed. */
305 opts
->x_flag_short_enums
= 2;
307 /* Initialize target_flags before default_options_optimization
308 so the latter can modify it. */
309 opts
->x_target_flags
= targetm_common
.default_target_flags
;
311 /* Some targets have ABI-specified unwind tables. */
312 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
314 /* Some targets have other target-specific initialization. */
315 targetm_common
.option_init_struct (opts
);
318 /* Release any allocations owned by OPTS. */
321 finalize_options_struct (struct gcc_options
*opts
)
323 XDELETEVEC (opts
->x_param_values
);
326 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
327 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
328 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
329 mask LANG_MASK and option handlers HANDLERS. */
332 maybe_default_option (struct gcc_options
*opts
,
333 struct gcc_options
*opts_set
,
334 const struct default_options
*default_opt
,
335 int level
, bool size
, bool fast
, bool debug
,
336 unsigned int lang_mask
,
337 const struct cl_option_handlers
*handlers
,
339 diagnostic_context
*dc
)
341 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
345 gcc_assert (level
== 2);
347 gcc_assert (level
== 3);
349 gcc_assert (level
== 1);
351 switch (default_opt
->levels
)
357 case OPT_LEVELS_0_ONLY
:
358 enabled
= (level
== 0);
361 case OPT_LEVELS_1_PLUS
:
362 enabled
= (level
>= 1);
365 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
366 enabled
= (level
>= 1 && !size
&& !debug
);
369 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
370 enabled
= (level
>= 1 && !debug
);
373 case OPT_LEVELS_2_PLUS
:
374 enabled
= (level
>= 2);
377 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
378 enabled
= (level
>= 2 && !size
&& !debug
);
381 case OPT_LEVELS_3_PLUS
:
382 enabled
= (level
>= 3);
385 case OPT_LEVELS_3_PLUS_AND_SIZE
:
386 enabled
= (level
>= 3 || size
);
389 case OPT_LEVELS_SIZE
:
393 case OPT_LEVELS_FAST
:
397 case OPT_LEVELS_NONE
:
403 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
404 default_opt
->arg
, default_opt
->value
,
405 lang_mask
, DK_UNSPECIFIED
, loc
,
407 else if (default_opt
->arg
== NULL
408 && !option
->cl_reject_negative
)
409 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
410 default_opt
->arg
, !default_opt
->value
,
411 lang_mask
, DK_UNSPECIFIED
, loc
,
415 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
416 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
417 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
418 language mask LANG_MASK and option handlers HANDLERS. */
421 maybe_default_options (struct gcc_options
*opts
,
422 struct gcc_options
*opts_set
,
423 const struct default_options
*default_opts
,
424 int level
, bool size
, bool fast
, bool debug
,
425 unsigned int lang_mask
,
426 const struct cl_option_handlers
*handlers
,
428 diagnostic_context
*dc
)
432 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
433 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
434 level
, size
, fast
, debug
,
435 lang_mask
, handlers
, loc
, dc
);
438 /* Table of options enabled by default at different levels. */
440 static const struct default_options default_options_table
[] =
442 /* -O1 optimizations. */
443 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS
, OPT_ftree_coalesce_vars
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
465 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
466 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
467 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
468 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
469 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
470 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
471 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
472 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
473 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
474 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
475 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
476 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
477 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
478 { OPT_LEVELS_1_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
480 /* -O2 optimizations. */
481 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
493 #ifdef INSN_SCHEDULING
494 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
495 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_freorder_blocks_algorithm_
, NULL
,
500 REORDER_BLOCKS_ALGORITHM_STC
},
501 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
503 { OPT_LEVELS_2_PLUS
, OPT_fcode_hoisting
, NULL
, 1 },
504 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
505 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
506 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
507 { OPT_LEVELS_2_PLUS
, OPT_fipa_bit_cp
, NULL
, 1 },
508 { OPT_LEVELS_2_PLUS
, OPT_fipa_vrp
, NULL
, 1 },
509 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
510 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
511 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
512 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
513 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
514 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
515 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
516 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
517 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
518 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
519 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
520 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
521 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
522 { OPT_LEVELS_2_PLUS
, OPT_fipa_ra
, NULL
, 1 },
523 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
524 { OPT_LEVELS_2_PLUS
, OPT_fstore_merging
, NULL
, 1 },
526 /* -O3 optimizations. */
527 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
528 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
529 { OPT_LEVELS_3_PLUS
, OPT_fsplit_paths
, NULL
, 1 },
530 /* Inlining of functions reducing size is a good idea with -Os
531 regardless of them being declared inline. */
532 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
533 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
534 { OPT_LEVELS_3_PLUS
, OPT_fsplit_loops
, NULL
, 1 },
535 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
536 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
537 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
538 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
539 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
540 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
541 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
542 { OPT_LEVELS_3_PLUS
, OPT_fpeel_loops
, NULL
, 1 },
544 /* -Ofast adds optimizations to -O3. */
545 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
547 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
550 /* Default the options in OPTS and OPTS_SET based on the optimization
551 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
553 default_options_optimization (struct gcc_options
*opts
,
554 struct gcc_options
*opts_set
,
555 struct cl_decoded_option
*decoded_options
,
556 unsigned int decoded_options_count
,
558 unsigned int lang_mask
,
559 const struct cl_option_handlers
*handlers
,
560 diagnostic_context
*dc
)
564 bool openacc_mode
= false;
566 /* Scan to see what optimization level has been specified. That will
567 determine the default value of many flags. */
568 for (i
= 1; i
< decoded_options_count
; i
++)
570 struct cl_decoded_option
*opt
= &decoded_options
[i
];
571 switch (opt
->opt_index
)
574 if (*opt
->arg
== '\0')
576 opts
->x_optimize
= 1;
577 opts
->x_optimize_size
= 0;
578 opts
->x_optimize_fast
= 0;
579 opts
->x_optimize_debug
= 0;
583 const int optimize_val
= integral_argument (opt
->arg
);
584 if (optimize_val
== -1)
585 error_at (loc
, "argument to %<-O%> should be a non-negative "
586 "integer, %<g%>, %<s%> or %<fast%>");
589 opts
->x_optimize
= optimize_val
;
590 if ((unsigned int) opts
->x_optimize
> 255)
591 opts
->x_optimize
= 255;
592 opts
->x_optimize_size
= 0;
593 opts
->x_optimize_fast
= 0;
594 opts
->x_optimize_debug
= 0;
600 opts
->x_optimize_size
= 1;
602 /* Optimizing for size forces optimize to be 2. */
603 opts
->x_optimize
= 2;
604 opts
->x_optimize_fast
= 0;
605 opts
->x_optimize_debug
= 0;
609 /* -Ofast only adds flags to -O3. */
610 opts
->x_optimize_size
= 0;
611 opts
->x_optimize
= 3;
612 opts
->x_optimize_fast
= 1;
613 opts
->x_optimize_debug
= 0;
617 /* -Og selects optimization level 1. */
618 opts
->x_optimize_size
= 0;
619 opts
->x_optimize
= 1;
620 opts
->x_optimize_fast
= 0;
621 opts
->x_optimize_debug
= 1;
630 /* Ignore other options in this prescan. */
635 maybe_default_options (opts
, opts_set
, default_options_table
,
636 opts
->x_optimize
, opts
->x_optimize_size
,
637 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
638 lang_mask
, handlers
, loc
, dc
);
640 /* -O2 param settings. */
641 opt2
= (opts
->x_optimize
>= 2);
644 && !opts_set
->x_flag_ipa_pta
)
645 opts
->x_flag_ipa_pta
= true;
647 /* Track fields in field-sensitive alias analysis. */
648 maybe_set_param_value
649 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
650 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
651 opts
->x_param_values
, opts_set
->x_param_values
);
653 /* For -O1 only do loop invariant motion for very small loops. */
654 maybe_set_param_value
655 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
656 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
657 opts
->x_param_values
, opts_set
->x_param_values
);
659 /* At -Ofast, allow store motion to introduce potential race conditions. */
660 maybe_set_param_value
661 (PARAM_ALLOW_STORE_DATA_RACES
,
662 opts
->x_optimize_fast
? 1
663 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
664 opts
->x_param_values
, opts_set
->x_param_values
);
666 if (opts
->x_optimize_size
)
667 /* We want to crossjump as much as possible. */
668 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
669 opts
->x_param_values
, opts_set
->x_param_values
);
671 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
672 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
673 opts
->x_param_values
, opts_set
->x_param_values
);
675 /* Restrict the amount of work combine does at -Og while retaining
676 most of its useful transforms. */
677 if (opts
->x_optimize_debug
)
678 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
679 opts
->x_param_values
, opts_set
->x_param_values
);
681 /* Allow default optimizations to be specified on a per-machine basis. */
682 maybe_default_options (opts
, opts_set
,
683 targetm_common
.option_optimization_table
,
684 opts
->x_optimize
, opts
->x_optimize_size
,
685 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
686 lang_mask
, handlers
, loc
, dc
);
689 /* After all options at LOC have been read into OPTS and OPTS_SET,
690 finalize settings of those options and diagnose incompatible
693 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
696 enum unwind_info_type ui_except
;
698 if (opts
->x_dump_base_name
699 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
700 && ! opts
->x_dump_base_name_prefixed
)
702 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
703 OPTS->X_DUMP_DIR_NAME directory. Then try to make
704 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
705 directory, typically the directory to contain the object
707 if (opts
->x_dump_dir_name
)
708 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
709 opts
->x_dump_base_name
, NULL
);
710 else if (opts
->x_aux_base_name
711 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
713 const char *aux_base
;
715 base_of_path (opts
->x_aux_base_name
, &aux_base
);
716 if (opts
->x_aux_base_name
!= aux_base
)
718 int dir_len
= aux_base
- opts
->x_aux_base_name
;
719 char *new_dump_base_name
720 = XOBNEWVEC (&opts_obstack
, char,
721 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
723 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
724 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
725 /* Append existing OPTS->X_DUMP_BASE_NAME. */
726 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
727 opts
->x_dump_base_name
= new_dump_base_name
;
730 opts
->x_dump_base_name_prefixed
= true;
733 /* Handle related options for unit-at-a-time, toplevel-reorder, and
735 if (!opts
->x_flag_unit_at_a_time
)
737 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
738 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
740 opts
->x_flag_section_anchors
= 0;
741 if (opts
->x_flag_toplevel_reorder
== 1)
742 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
744 opts
->x_flag_toplevel_reorder
= 0;
747 /* -fself-test depends on the state of the compiler prior to
748 compiling anything. Ideally it should be run on an empty source
749 file. However, in case we get run with actual source, assume
750 -fsyntax-only which will inhibit any compiler initialization
751 which may confuse the self tests. */
752 if (opts
->x_flag_self_test
)
753 opts
->x_flag_syntax_only
= 1;
755 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
756 sorry ("transactional memory is not supported with non-call exceptions");
758 /* Unless the user has asked for section anchors, we disable toplevel
759 reordering at -O0 to disable transformations that might be surprising
760 to end users and to get -fno-toplevel-reorder tested. */
761 if (!opts
->x_optimize
762 && opts
->x_flag_toplevel_reorder
== 2
763 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
765 opts
->x_flag_toplevel_reorder
= 0;
766 opts
->x_flag_section_anchors
= 0;
768 if (!opts
->x_flag_toplevel_reorder
)
770 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
771 error_at (loc
, "section anchors must be disabled when toplevel reorder"
773 opts
->x_flag_section_anchors
= 0;
776 if (!opts
->x_flag_opts_finished
)
778 /* We initialize opts->x_flag_pie to -1 so that targets can set a
780 if (opts
->x_flag_pie
== -1)
782 /* We initialize opts->x_flag_pic to -1 so that we can tell if
783 -fpic, -fPIC, -fno-pic or -fno-PIC is used. */
784 if (opts
->x_flag_pic
== -1)
785 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
787 opts
->x_flag_pie
= 0;
789 /* If -fPIE or -fpie is used, turn on PIC. */
790 if (opts
->x_flag_pie
)
791 opts
->x_flag_pic
= opts
->x_flag_pie
;
792 else if (opts
->x_flag_pic
== -1)
793 opts
->x_flag_pic
= 0;
794 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
795 opts
->x_flag_shlib
= 1;
796 opts
->x_flag_opts_finished
= true;
799 /* We initialize opts->x_flag_stack_protect to -1 so that targets
800 can set a default value. */
801 if (opts
->x_flag_stack_protect
== -1)
802 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
804 if (opts
->x_optimize
== 0)
806 /* Inlining does not work if not optimizing,
807 so force it not to be done. */
808 opts
->x_warn_inline
= 0;
809 opts
->x_flag_no_inline
= 1;
812 /* The optimization to partition hot and cold basic blocks into separate
813 sections of the .o and executable files does not work (currently)
814 with exception handling. This is because there is no support for
815 generating unwind info. If opts->x_flag_exceptions is turned on
816 we need to turn off the partitioning optimization. */
818 ui_except
= targetm_common
.except_unwind_info (opts
);
820 if (opts
->x_flag_exceptions
821 && opts
->x_flag_reorder_blocks_and_partition
822 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
824 if (opts_set
->x_flag_reorder_blocks_and_partition
)
826 "%<-freorder-blocks-and-partition%> does not work "
827 "with exceptions on this architecture");
828 opts
->x_flag_reorder_blocks_and_partition
= 0;
829 opts
->x_flag_reorder_blocks
= 1;
832 /* If user requested unwind info, then turn off the partitioning
835 if (opts
->x_flag_unwind_tables
836 && !targetm_common
.unwind_tables_default
837 && opts
->x_flag_reorder_blocks_and_partition
838 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
840 if (opts_set
->x_flag_reorder_blocks_and_partition
)
842 "%<-freorder-blocks-and-partition%> does not support "
843 "unwind info on this architecture");
844 opts
->x_flag_reorder_blocks_and_partition
= 0;
845 opts
->x_flag_reorder_blocks
= 1;
848 /* If the target requested unwind info, then turn off the partitioning
849 optimization with a different message. Likewise, if the target does not
850 support named sections. */
852 if (opts
->x_flag_reorder_blocks_and_partition
853 && (!targetm_common
.have_named_sections
854 || (opts
->x_flag_unwind_tables
855 && targetm_common
.unwind_tables_default
856 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
858 if (opts_set
->x_flag_reorder_blocks_and_partition
)
860 "%<-freorder-blocks-and-partition%> does not work "
861 "on this architecture");
862 opts
->x_flag_reorder_blocks_and_partition
= 0;
863 opts
->x_flag_reorder_blocks
= 1;
867 /* Pipelining of outer loops is only possible when general pipelining
868 capabilities are requested. */
869 if (!opts
->x_flag_sel_sched_pipelining
)
870 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
872 if (opts
->x_flag_conserve_stack
)
874 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
875 opts
->x_param_values
, opts_set
->x_param_values
);
876 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
877 opts
->x_param_values
, opts_set
->x_param_values
);
880 if (opts
->x_flag_lto
)
883 opts
->x_flag_generate_lto
= 1;
885 /* When generating IL, do not operate in whole-program mode.
886 Otherwise, symbols will be privatized too early, causing link
888 opts
->x_flag_whole_program
= 0;
890 error_at (loc
, "LTO support has not been enabled in this configuration");
892 if (!opts
->x_flag_fat_lto_objects
894 || (opts_set
->x_flag_use_linker_plugin
895 && !opts
->x_flag_use_linker_plugin
)))
897 if (opts_set
->x_flag_fat_lto_objects
)
898 error_at (loc
, "%<-fno-fat-lto-objects%> are supported only with "
900 opts
->x_flag_fat_lto_objects
= 1;
904 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
905 default value if they choose based on other options. */
906 if (opts
->x_flag_split_stack
== -1)
907 opts
->x_flag_split_stack
= 0;
908 else if (opts
->x_flag_split_stack
)
910 if (!targetm_common
.supports_split_stack (true, opts
))
912 error_at (loc
, "%<-fsplit-stack%> is not supported by "
913 "this compiler configuration");
914 opts
->x_flag_split_stack
= 0;
918 /* If stack splitting is turned on, and the user did not explicitly
919 request function partitioning, turn off partitioning, as it
920 confuses the linker when trying to handle partitioned split-stack
921 code that calls a non-split-stack functions. But if partitioning
922 was turned on explicitly just hope for the best. */
923 if (opts
->x_flag_split_stack
924 && opts
->x_flag_reorder_blocks_and_partition
925 && !opts_set
->x_flag_reorder_blocks_and_partition
)
926 opts
->x_flag_reorder_blocks_and_partition
= 0;
928 if (opts
->x_flag_reorder_blocks_and_partition
929 && !opts_set
->x_flag_reorder_functions
)
930 opts
->x_flag_reorder_functions
= 1;
932 /* Tune vectorization related parametees according to cost model. */
933 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
935 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
936 6, opts
->x_param_values
, opts_set
->x_param_values
);
937 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
938 0, opts
->x_param_values
, opts_set
->x_param_values
);
939 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
940 0, opts
->x_param_values
, opts_set
->x_param_values
);
943 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
945 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
946 || !opts
->x_flag_tree_loop_if_convert
)
947 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
948 opts
->x_param_values
, opts_set
->x_param_values
);
950 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
951 if (opts
->x_dwarf_split_debug_info
)
952 opts
->x_debug_generate_pub_sections
= 2;
954 /* Userspace and kernel ASan conflict with each other. */
955 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
956 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
958 "%<-fsanitize=address%> is incompatible with "
959 "%<-fsanitize=kernel-address%>");
962 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
963 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
965 "%<-fsanitize=address%> and %<-fsanitize=kernel-address%> "
966 "are incompatible with %<-fsanitize=thread%>");
968 if ((opts
->x_flag_sanitize
& SANITIZE_LEAK
)
969 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
971 "%<-fsanitize=leak%> is incompatible with %<-fsanitize=thread%>");
973 /* Check error recovery for -fsanitize-recover option. */
974 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
975 if ((opts
->x_flag_sanitize_recover
& sanitizer_opts
[i
].flag
)
976 && !sanitizer_opts
[i
].can_recover
)
977 error_at (loc
, "%<-fsanitize-recover=%s%> is not supported",
978 sanitizer_opts
[i
].name
);
980 /* When instrumenting the pointers, we don't want to remove
981 the null pointer checks. */
982 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
983 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
984 opts
->x_flag_delete_null_pointer_checks
= 0;
986 /* Aggressive compiler optimizations may cause false negatives. */
987 if (opts
->x_flag_sanitize
& ~(SANITIZE_LEAK
| SANITIZE_UNREACHABLE
))
988 opts
->x_flag_aggressive_loop_optimizations
= 0;
990 /* Enable -fsanitize-address-use-after-scope if address sanitizer is
992 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
993 && !opts_set
->x_flag_sanitize_address_use_after_scope
)
994 opts
->x_flag_sanitize_address_use_after_scope
= true;
996 /* Force -fstack-reuse=none in case -fsanitize-address-use-after-scope
998 if (opts
->x_flag_sanitize_address_use_after_scope
)
1000 if (opts
->x_flag_stack_reuse
!= SR_NONE
1001 && opts_set
->x_flag_stack_reuse
!= SR_NONE
)
1003 "%<-fsanitize-address-use-after-scope%> requires "
1004 "%<-fstack-reuse=none%> option");
1006 opts
->x_flag_stack_reuse
= SR_NONE
;
1010 #define LEFT_COLUMN 27
1012 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1013 followed by word-wrapped HELP in a second column. */
1015 wrap_help (const char *help
,
1017 unsigned int item_width
,
1018 unsigned int columns
)
1020 unsigned int col_width
= LEFT_COLUMN
;
1021 unsigned int remaining
, room
, len
;
1023 remaining
= strlen (help
);
1027 room
= columns
- 3 - MAX (col_width
, item_width
);
1036 for (i
= 0; help
[i
]; i
++)
1038 if (i
>= room
&& len
!= remaining
)
1042 else if ((help
[i
] == '-' || help
[i
] == '/')
1043 && help
[i
+ 1] != ' '
1044 && i
> 0 && ISALPHA (help
[i
- 1]))
1049 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1051 while (help
[len
] == ' ')
1059 /* Print help for a specific front-end, etc. */
1061 print_filtered_help (unsigned int include_flags
,
1062 unsigned int exclude_flags
,
1063 unsigned int any_flags
,
1064 unsigned int columns
,
1065 struct gcc_options
*opts
,
1066 unsigned int lang_mask
)
1071 bool displayed
= false;
1074 if (include_flags
== CL_PARAMS
)
1076 for (i
= 0; i
< LAST_PARAM
; i
++)
1078 const char *param
= compiler_params
[i
].option
;
1080 help
= compiler_params
[i
].help
;
1081 if (help
== NULL
|| *help
== '\0')
1083 if (exclude_flags
& CL_UNDOCUMENTED
)
1085 help
= undocumented_msg
;
1088 /* Get the translation. */
1091 if (!opts
->x_quiet_flag
)
1093 snprintf (new_help
, sizeof (new_help
),
1094 _("default %d minimum %d maximum %d"),
1095 compiler_params
[i
].default_value
,
1096 compiler_params
[i
].min_value
,
1097 compiler_params
[i
].max_value
);
1100 wrap_help (help
, param
, strlen (param
), columns
);
1106 if (!opts
->x_help_printed
)
1107 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1109 if (!opts
->x_help_enum_printed
)
1110 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1112 for (i
= 0; i
< cl_options_count
; i
++)
1114 const struct cl_option
*option
= cl_options
+ i
;
1119 if (include_flags
== 0
1120 || ((option
->flags
& include_flags
) != include_flags
))
1122 if ((option
->flags
& any_flags
) == 0)
1126 /* Skip unwanted switches. */
1127 if ((option
->flags
& exclude_flags
) != 0)
1130 /* The driver currently prints its own help text. */
1131 if ((option
->flags
& CL_DRIVER
) != 0
1132 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1133 | CL_COMMON
| CL_TARGET
)) == 0)
1137 /* Skip switches that have already been printed. */
1138 if (opts
->x_help_printed
[i
])
1141 opts
->x_help_printed
[i
] = true;
1143 help
= option
->help
;
1146 if (exclude_flags
& CL_UNDOCUMENTED
)
1149 help
= undocumented_msg
;
1152 if (option
->alias_target
< N_OPTS
1153 && cl_options
[option
->alias_target
].help
)
1155 if (help
== undocumented_msg
)
1157 /* For undocumented options that are aliases for other options
1158 that are documented, point the reader to the other option in
1159 preference of the former. */
1160 snprintf (new_help
, sizeof new_help
,
1161 _("Same as %s. Use the latter option instead."),
1162 cl_options
[option
->alias_target
].opt_text
);
1166 /* For documented options with aliases, mention the aliased
1167 option's name for reference. */
1168 snprintf (new_help
, sizeof new_help
,
1169 _("%s Same as %s."),
1170 help
, cl_options
[option
->alias_target
].opt_text
);
1176 if (option
->warn_message
)
1178 /* Mention that the use of the option will trigger a warning. */
1179 if (help
== new_help
)
1180 snprintf (new_help
+ strlen (new_help
),
1181 sizeof new_help
- strlen (new_help
),
1182 " %s", _(use_diagnosed_msg
));
1184 snprintf (new_help
, sizeof new_help
,
1185 "%s %s", help
, _(use_diagnosed_msg
));
1190 /* Get the translation. */
1193 /* Find the gap between the name of the
1194 option and its descriptive text. */
1195 tab
= strchr (help
, '\t');
1204 opt
= option
->opt_text
;
1208 /* With the -Q option enabled we change the descriptive text associated
1209 with an option to be an indication of its current setting. */
1210 if (!opts
->x_quiet_flag
)
1212 void *flag_var
= option_flag_var (i
, opts
);
1214 if (len
< (LEFT_COLUMN
+ 2))
1215 strcpy (new_help
, "\t\t");
1217 strcpy (new_help
, "\t");
1219 if (flag_var
!= NULL
1220 && option
->var_type
!= CLVC_DEFER
)
1222 if (option
->flags
& CL_JOINED
)
1224 if (option
->var_type
== CLVC_STRING
)
1226 if (* (const char **) flag_var
!= NULL
)
1227 snprintf (new_help
+ strlen (new_help
),
1228 sizeof (new_help
) - strlen (new_help
),
1229 "%s", * (const char **) flag_var
);
1231 else if (option
->var_type
== CLVC_ENUM
)
1233 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1235 const char *arg
= NULL
;
1237 value
= e
->get (flag_var
);
1238 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1240 arg
= _("[default]");
1241 snprintf (new_help
+ strlen (new_help
),
1242 sizeof (new_help
) - strlen (new_help
),
1246 sprintf (new_help
+ strlen (new_help
),
1247 "%d", * (int *) flag_var
);
1250 strcat (new_help
, option_enabled (i
, opts
)
1251 ? _("[enabled]") : _("[disabled]"));
1257 if (option
->range_max
!= -1)
1260 snprintf (b
, sizeof (b
), "<%d,%d>", option
->range_min
,
1262 opt
= concat (opt
, b
, NULL
);
1266 wrap_help (help
, opt
, len
, columns
);
1269 if (option
->var_type
== CLVC_ENUM
1270 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1271 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1276 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1279 printf (_(" No options with the desired characteristics were found\n"));
1284 /* PR 31349: Tell the user how to see all of the
1285 options supported by a specific front end. */
1286 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1287 if ((1U << i
) & langs
)
1288 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1289 lang_names
[i
], lang_names
[i
]);
1293 else if (! displayed
)
1294 printf (_(" All options with the desired characteristics have already been displayed\n"));
1298 /* Print details of enumerated option arguments, if those
1299 enumerations have help text headings provided. If no help text
1300 is provided, presume that the possible values are listed in the
1301 help text for the relevant options. */
1302 for (i
= 0; i
< cl_enums_count
; i
++)
1304 unsigned int j
, pos
;
1306 if (opts
->x_help_enum_printed
[i
] != 1)
1308 if (cl_enums
[i
].help
== NULL
)
1310 printf (" %s\n ", _(cl_enums
[i
].help
));
1312 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1314 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1316 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1318 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1328 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1333 opts
->x_help_enum_printed
[i
] = 2;
1337 /* Display help for a specified type of option.
1338 The options must have ALL of the INCLUDE_FLAGS set
1339 ANY of the flags in the ANY_FLAGS set
1340 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1341 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1343 print_specific_help (unsigned int include_flags
,
1344 unsigned int exclude_flags
,
1345 unsigned int any_flags
,
1346 struct gcc_options
*opts
,
1347 unsigned int lang_mask
)
1349 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1350 const char * description
= NULL
;
1351 const char * descrip_extra
= "";
1355 /* Sanity check: Make sure that we do not have more
1356 languages than we have bits available to enumerate them. */
1357 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1359 /* If we have not done so already, obtain
1360 the desired maximum width of the output. */
1361 if (opts
->x_help_columns
== 0)
1363 opts
->x_help_columns
= get_terminal_width ();
1364 if (opts
->x_help_columns
== INT_MAX
)
1365 /* Use a reasonable default. */
1366 opts
->x_help_columns
= 80;
1369 /* Decide upon the title for the options that we are going to display. */
1370 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1372 switch (flag
& include_flags
)
1379 description
= _("The following options are target specific");
1382 description
= _("The following options control compiler warning messages");
1384 case CL_OPTIMIZATION
:
1385 description
= _("The following options control optimizations");
1388 description
= _("The following options are language-independent");
1391 description
= _("The --param option recognizes the following as parameters");
1394 if (i
>= cl_lang_count
)
1396 if (exclude_flags
& all_langs_mask
)
1397 description
= _("The following options are specific to just the language ");
1399 description
= _("The following options are supported by the language ");
1400 descrip_extra
= lang_names
[i
];
1405 if (description
== NULL
)
1409 if (include_flags
& CL_UNDOCUMENTED
)
1410 description
= _("The following options are not documented");
1411 else if (include_flags
& CL_SEPARATE
)
1412 description
= _("The following options take separate arguments");
1413 else if (include_flags
& CL_JOINED
)
1414 description
= _("The following options take joined arguments");
1417 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1424 if (any_flags
& all_langs_mask
)
1425 description
= _("The following options are language-related");
1427 description
= _("The following options are language-independent");
1431 printf ("%s%s:\n", description
, descrip_extra
);
1432 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1433 opts
->x_help_columns
, opts
, lang_mask
);
1436 /* Enable FDO-related flags. */
1439 enable_fdo_optimizations (struct gcc_options
*opts
,
1440 struct gcc_options
*opts_set
,
1443 if (!opts_set
->x_flag_branch_probabilities
)
1444 opts
->x_flag_branch_probabilities
= value
;
1445 if (!opts_set
->x_flag_profile_values
)
1446 opts
->x_flag_profile_values
= value
;
1447 if (!opts_set
->x_flag_unroll_loops
)
1448 opts
->x_flag_unroll_loops
= value
;
1449 if (!opts_set
->x_flag_peel_loops
)
1450 opts
->x_flag_peel_loops
= value
;
1451 if (!opts_set
->x_flag_tracer
)
1452 opts
->x_flag_tracer
= value
;
1453 if (!opts_set
->x_flag_value_profile_transformations
)
1454 opts
->x_flag_value_profile_transformations
= value
;
1455 if (!opts_set
->x_flag_inline_functions
)
1456 opts
->x_flag_inline_functions
= value
;
1457 if (!opts_set
->x_flag_ipa_cp
)
1458 opts
->x_flag_ipa_cp
= value
;
1459 if (!opts_set
->x_flag_ipa_cp_clone
1460 && value
&& opts
->x_flag_ipa_cp
)
1461 opts
->x_flag_ipa_cp_clone
= value
;
1462 if (!opts_set
->x_flag_ipa_bit_cp
1463 && value
&& opts
->x_flag_ipa_cp
)
1464 opts
->x_flag_ipa_bit_cp
= value
;
1465 if (!opts_set
->x_flag_predictive_commoning
)
1466 opts
->x_flag_predictive_commoning
= value
;
1467 if (!opts_set
->x_flag_split_loops
)
1468 opts
->x_flag_split_loops
= value
;
1469 if (!opts_set
->x_flag_unswitch_loops
)
1470 opts
->x_flag_unswitch_loops
= value
;
1471 if (!opts_set
->x_flag_gcse_after_reload
)
1472 opts
->x_flag_gcse_after_reload
= value
;
1473 if (!opts_set
->x_flag_tree_loop_vectorize
1474 && !opts_set
->x_flag_tree_vectorize
)
1475 opts
->x_flag_tree_loop_vectorize
= value
;
1476 if (!opts_set
->x_flag_tree_slp_vectorize
1477 && !opts_set
->x_flag_tree_vectorize
)
1478 opts
->x_flag_tree_slp_vectorize
= value
;
1479 if (!opts_set
->x_flag_vect_cost_model
)
1480 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1481 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1482 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1485 /* -f{,no-}sanitize{,-recover}= suboptions. */
1486 const struct sanitizer_opts_s sanitizer_opts
[] =
1488 #define SANITIZER_OPT(name, flags, recover) \
1489 { #name, flags, sizeof #name - 1, recover }
1490 SANITIZER_OPT (address
, (SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
), true),
1491 SANITIZER_OPT (kernel
-address
, (SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
),
1493 SANITIZER_OPT (thread
, SANITIZE_THREAD
, false),
1494 SANITIZER_OPT (leak
, SANITIZE_LEAK
, false),
1495 SANITIZER_OPT (shift
, SANITIZE_SHIFT
, true),
1496 SANITIZER_OPT (shift
-base
, SANITIZE_SHIFT_BASE
, true),
1497 SANITIZER_OPT (shift
-exponent
, SANITIZE_SHIFT_EXPONENT
, true),
1498 SANITIZER_OPT (integer
-divide
-by
-zero
, SANITIZE_DIVIDE
, true),
1499 SANITIZER_OPT (undefined
, SANITIZE_UNDEFINED
, true),
1500 SANITIZER_OPT (unreachable
, SANITIZE_UNREACHABLE
, false),
1501 SANITIZER_OPT (vla
-bound
, SANITIZE_VLA
, true),
1502 SANITIZER_OPT (return, SANITIZE_RETURN
, false),
1503 SANITIZER_OPT (null
, SANITIZE_NULL
, true),
1504 SANITIZER_OPT (signed-integer
-overflow
, SANITIZE_SI_OVERFLOW
, true),
1505 SANITIZER_OPT (bool, SANITIZE_BOOL
, true),
1506 SANITIZER_OPT (enum, SANITIZE_ENUM
, true),
1507 SANITIZER_OPT (float-divide
-by
-zero
, SANITIZE_FLOAT_DIVIDE
, true),
1508 SANITIZER_OPT (float-cast
-overflow
, SANITIZE_FLOAT_CAST
, true),
1509 SANITIZER_OPT (bounds
, SANITIZE_BOUNDS
, true),
1510 SANITIZER_OPT (bounds
-strict
, SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
, true),
1511 SANITIZER_OPT (alignment
, SANITIZE_ALIGNMENT
, true),
1512 SANITIZER_OPT (nonnull
-attribute
, SANITIZE_NONNULL_ATTRIBUTE
, true),
1513 SANITIZER_OPT (returns
-nonnull
-attribute
, SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1515 SANITIZER_OPT (object
-size
, SANITIZE_OBJECT_SIZE
, true),
1516 SANITIZER_OPT (vptr
, SANITIZE_VPTR
, true),
1517 SANITIZER_OPT (all
, ~0U, true),
1518 #undef SANITIZER_OPT
1519 { NULL
, 0U, 0UL, false }
1522 /* A struct for describing a run of chars within a string. */
1524 struct string_fragment
1526 string_fragment (const char *start
, size_t len
)
1527 : m_start (start
), m_len (len
) {}
1529 const char *m_start
;
1533 /* Specialization of edit_distance_traits for string_fragment,
1534 for use by get_closest_sanitizer_option. */
1537 struct edit_distance_traits
<const string_fragment
&>
1539 static size_t get_length (const string_fragment
&fragment
)
1541 return fragment
.m_len
;
1544 static const char *get_string (const string_fragment
&fragment
)
1546 return fragment
.m_start
;
1550 /* Given ARG, an unrecognized sanitizer option, return the best
1551 matching sanitizer option, or NULL if there isn't one.
1552 CODE is OPT_fsanitize_ or OPT_fsanitize_recover_.
1553 VALUE is non-zero for the regular form of the option, zero
1554 for the "no-" form (e.g. "-fno-sanitize-recover="). */
1557 get_closest_sanitizer_option (const string_fragment
&arg
,
1558 enum opt_code code
, int value
)
1560 best_match
<const string_fragment
&, const char*> bm (arg
);
1561 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1563 /* -fsanitize=all is not valid, so don't offer it. */
1564 if (sanitizer_opts
[i
].flag
== ~0U
1565 && code
== OPT_fsanitize_
1569 /* For -fsanitize-recover= (and not -fno-sanitize-recover=),
1570 don't offer the non-recoverable options. */
1571 if (!sanitizer_opts
[i
].can_recover
1572 && code
== OPT_fsanitize_recover_
1576 bm
.consider (sanitizer_opts
[i
].name
);
1578 return bm
.get_best_meaningful_candidate ();
1581 /* Parse comma separated sanitizer suboptions from P for option SCODE,
1582 adjust previous FLAGS and return new ones. If COMPLAIN is false,
1583 don't issue diagnostics. */
1586 parse_sanitizer_options (const char *p
, location_t loc
, int scode
,
1587 unsigned int flags
, int value
, bool complain
)
1589 enum opt_code code
= (enum opt_code
) scode
;
1594 const char *comma
= strchr (p
, ',');
1606 /* Check to see if the string matches an option class name. */
1607 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1608 if (len
== sanitizer_opts
[i
].len
1609 && memcmp (p
, sanitizer_opts
[i
].name
, len
) == 0)
1611 /* Handle both -fsanitize and -fno-sanitize cases. */
1612 if (value
&& sanitizer_opts
[i
].flag
== ~0U)
1614 if (code
== OPT_fsanitize_
)
1617 error_at (loc
, "%<-fsanitize=all%> option is not valid");
1620 flags
|= ~(SANITIZE_THREAD
| SANITIZE_LEAK
1621 | SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1625 /* Do not enable -fsanitize-recover=unreachable and
1626 -fsanitize-recover=return if -fsanitize-recover=undefined
1628 if (code
== OPT_fsanitize_recover_
1629 && sanitizer_opts
[i
].flag
== SANITIZE_UNDEFINED
)
1630 flags
|= (SANITIZE_UNDEFINED
1631 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
));
1633 flags
|= sanitizer_opts
[i
].flag
;
1636 flags
&= ~sanitizer_opts
[i
].flag
;
1641 if (! found
&& complain
)
1644 = get_closest_sanitizer_option (string_fragment (p
, len
),
1649 "unrecognized argument to -f%ssanitize%s= option: %q.*s;"
1650 " did you mean %qs?",
1652 code
== OPT_fsanitize_
? "" : "-recover",
1653 (int) len
, p
, hint
);
1656 "unrecognized argument to -f%ssanitize%s= option: %q.*s",
1658 code
== OPT_fsanitize_
? "" : "-recover",
1669 /* Parse string values of no_sanitize attribute passed in VALUE.
1670 Values are separated with comma. Wrong argument is stored to
1671 WRONG_ARGUMENT variable. */
1674 parse_no_sanitize_attribute (char *value
, char **wrong_argument
)
1676 unsigned int flags
= 0;
1678 char *q
= strtok (value
, ",");
1682 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1683 if (strcmp (sanitizer_opts
[i
].name
, q
) == 0)
1685 flags
|= sanitizer_opts
[i
].flag
;
1686 if (sanitizer_opts
[i
].flag
== SANITIZE_UNDEFINED
)
1687 flags
|= SANITIZE_UNDEFINED_NONDEFAULT
;
1691 if (sanitizer_opts
[i
].name
== NULL
)
1692 *wrong_argument
= q
;
1694 q
= strtok (NULL
, ",");
1700 /* Handle target- and language-independent options. Return zero to
1701 generate an "unknown option" message. Only options that need
1702 extra handling need to be listed here; if you simply want
1703 DECODED->value assigned to a variable, it happens automatically. */
1706 common_handle_option (struct gcc_options
*opts
,
1707 struct gcc_options
*opts_set
,
1708 const struct cl_decoded_option
*decoded
,
1709 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1711 const struct cl_option_handlers
*handlers
,
1712 diagnostic_context
*dc
)
1714 size_t scode
= decoded
->opt_index
;
1715 const char *arg
= decoded
->arg
;
1716 int value
= decoded
->value
;
1717 enum opt_code code
= (enum opt_code
) scode
;
1719 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1724 handle_param (opts
, opts_set
, loc
, arg
);
1729 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1730 unsigned int undoc_mask
;
1733 if (lang_mask
== CL_DRIVER
)
1736 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1739 /* First display any single language specific options. */
1740 for (i
= 0; i
< cl_lang_count
; i
++)
1742 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1744 /* Next display any multi language specific options. */
1745 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1746 /* Then display any remaining, non-language options. */
1747 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1749 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1750 opts
->x_exit_after_options
= true;
1754 case OPT__target_help
:
1755 if (lang_mask
== CL_DRIVER
)
1758 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1759 opts
->x_exit_after_options
= true;
1764 const char *a
= arg
;
1765 unsigned int include_flags
= 0;
1766 /* Note - by default we include undocumented options when listing
1767 specific classes. If you only want to see documented options
1768 then add ",^undocumented" to the --help= option. E.g.:
1770 --help=target,^undocumented */
1771 unsigned int exclude_flags
= 0;
1773 if (lang_mask
== CL_DRIVER
)
1776 /* Walk along the argument string, parsing each word in turn.
1778 arg = [^]{word}[,{arg}]
1779 word = {optimizers|target|warnings|undocumented|
1780 params|common|<language>} */
1790 { "optimizers", CL_OPTIMIZATION
},
1791 { "target", CL_TARGET
},
1792 { "warnings", CL_WARNING
},
1793 { "undocumented", CL_UNDOCUMENTED
},
1794 { "params", CL_PARAMS
},
1795 { "joined", CL_JOINED
},
1796 { "separate", CL_SEPARATE
},
1797 { "common", CL_COMMON
},
1800 unsigned int *pflags
;
1802 unsigned int lang_flag
, specific_flag
;
1811 error_at (loc
, "missing argument to %qs", "--help=^");
1814 pflags
= &exclude_flags
;
1817 pflags
= &include_flags
;
1819 comma
= strchr (a
, ',');
1830 /* Check to see if the string matches an option class name. */
1831 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1832 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1834 specific_flag
= specifics
[i
].flag
;
1838 /* Check to see if the string matches a language name.
1839 Note - we rely upon the alpha-sorted nature of the entries in
1840 the lang_names array, specifically that shorter names appear
1841 before their longer variants. (i.e. C before C++). That way
1842 when we are attempting to match --help=c for example we will
1843 match with C first and not C++. */
1844 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1845 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1847 lang_flag
= 1U << i
;
1851 if (specific_flag
!= 0)
1854 *pflags
|= specific_flag
;
1857 /* The option's argument matches both the start of a
1858 language name and the start of an option class name.
1859 We have a special case for when the user has
1860 specified "--help=c", but otherwise we have to issue
1862 if (strncasecmp (a
, "c", len
) == 0)
1863 *pflags
|= lang_flag
;
1866 "--help argument %q.*s is ambiguous, "
1867 "please be more specific",
1871 else if (lang_flag
!= 0)
1872 *pflags
|= lang_flag
;
1875 "unrecognized argument to --help= option: %q.*s",
1884 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1886 opts
->x_exit_after_options
= true;
1891 if (lang_mask
== CL_DRIVER
)
1894 opts
->x_exit_after_options
= true;
1897 case OPT_fsanitize_
:
1898 opts
->x_flag_sanitize
1899 = parse_sanitizer_options (arg
, loc
, code
,
1900 opts
->x_flag_sanitize
, value
, true);
1902 /* Kernel ASan implies normal ASan but does not yet support
1904 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1906 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1907 0, opts
->x_param_values
,
1908 opts_set
->x_param_values
);
1909 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1910 opts_set
->x_param_values
);
1911 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1912 opts_set
->x_param_values
);
1913 maybe_set_param_value (PARAM_ASAN_PROTECT_ALLOCAS
, 0,
1914 opts
->x_param_values
,
1915 opts_set
->x_param_values
);
1916 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1917 opts
->x_param_values
,
1918 opts_set
->x_param_values
);
1922 case OPT_fsanitize_recover_
:
1923 opts
->x_flag_sanitize_recover
1924 = parse_sanitizer_options (arg
, loc
, code
,
1925 opts
->x_flag_sanitize_recover
, value
, true);
1928 case OPT_fasan_shadow_offset_
:
1932 case OPT_fsanitize_address_use_after_scope
:
1933 opts
->x_flag_sanitize_address_use_after_scope
= value
;
1936 case OPT_fsanitize_recover
:
1938 opts
->x_flag_sanitize_recover
1939 |= (SANITIZE_UNDEFINED
| SANITIZE_UNDEFINED_NONDEFAULT
)
1940 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1942 opts
->x_flag_sanitize_recover
1943 &= ~(SANITIZE_UNDEFINED
| SANITIZE_UNDEFINED_NONDEFAULT
);
1950 /* Currently handled in a prescan. */
1954 dc
->warning_as_error_requested
= value
;
1958 if (lang_mask
== CL_DRIVER
)
1961 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1962 opts
, opts_set
, loc
, dc
);
1965 case OPT_Wlarger_than_
:
1966 opts
->x_larger_than_size
= value
;
1967 opts
->x_warn_larger_than
= value
!= -1;
1970 case OPT_Wfatal_errors
:
1971 dc
->fatal_errors
= value
;
1974 case OPT_Wframe_larger_than_
:
1975 opts
->x_frame_larger_than_size
= value
;
1976 opts
->x_warn_frame_larger_than
= value
!= -1;
1979 case OPT_Wstack_usage_
:
1980 opts
->x_warn_stack_usage
= value
;
1981 opts
->x_flag_stack_usage_info
= value
!= -1;
1984 case OPT_Wstrict_aliasing
:
1985 set_Wstrict_aliasing (opts
, value
);
1988 case OPT_Wstrict_overflow
:
1989 opts
->x_warn_strict_overflow
= (value
1990 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1994 case OPT_Wsystem_headers
:
1995 dc
->dc_warn_system_headers
= value
;
1999 opts
->x_flag_gen_aux_info
= 1;
2002 case OPT_auxbase_strip
:
2004 char *tmp
= xstrdup (arg
);
2005 strip_off_ending (tmp
, strlen (tmp
));
2007 opts
->x_aux_base_name
= tmp
;
2014 decode_d_option (arg
, opts
, loc
, dc
);
2017 case OPT_fcall_used_
:
2018 case OPT_fcall_saved_
:
2026 case OPT_fdbg_cnt_list
:
2028 opts
->x_exit_after_options
= true;
2031 case OPT_fdebug_prefix_map_
:
2035 case OPT_fdiagnostics_show_location_
:
2036 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
2039 case OPT_fdiagnostics_show_caret
:
2040 dc
->show_caret
= value
;
2043 case OPT_fdiagnostics_color_
:
2044 diagnostic_color_init (dc
, value
);
2047 case OPT_fdiagnostics_parseable_fixits
:
2048 dc
->parseable_fixits_p
= value
;
2051 case OPT_fdiagnostics_show_option
:
2052 dc
->show_option_requested
= value
;
2059 case OPT_ffast_math
:
2060 set_fast_math_flags (opts
, value
);
2063 case OPT_funsafe_math_optimizations
:
2064 set_unsafe_math_optimizations_flags (opts
, value
);
2071 case OPT_finline_limit_
:
2072 set_param_value ("max-inline-insns-single", value
/ 2,
2073 opts
->x_param_values
, opts_set
->x_param_values
);
2074 set_param_value ("max-inline-insns-auto", value
/ 2,
2075 opts
->x_param_values
, opts_set
->x_param_values
);
2078 case OPT_finstrument_functions_exclude_function_list_
:
2079 add_comma_separated_to_vector
2080 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
2083 case OPT_finstrument_functions_exclude_file_list_
:
2084 add_comma_separated_to_vector
2085 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
2088 case OPT_fmessage_length_
:
2089 pp_set_line_maximum_length (dc
->printer
, value
);
2090 diagnostic_set_caret_max_width (dc
, value
);
2094 case OPT_fopt_info_
:
2100 const char *p
= arg
;
2101 opts
->x_flag_disable_hsa
= true;
2104 const char *comma
= strchr (p
, ',');
2106 if ((strncmp (p
, "disable", 7) == 0)
2107 && (p
[7] == ',' || p
[7] == '\0'))
2109 opts
->x_flag_disable_hsa
= true;
2113 if ((strncmp (p
, "hsa", 3) == 0)
2114 && (p
[3] == ',' || p
[3] == '\0'))
2117 opts
->x_flag_disable_hsa
= false;
2119 sorry ("HSA has not been enabled during configuration");
2129 #ifndef ACCEL_COMPILER
2130 case OPT_foffload_abi_
:
2131 error_at (loc
, "%<-foffload-abi%> option can be specified only for "
2132 "offload compiler");
2136 case OPT_fpack_struct_
:
2137 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
2139 "structure alignment must be a small power of two, not %d",
2142 opts
->x_initial_max_fld_align
= value
;
2146 case OPT_fplugin_arg_
:
2150 case OPT_fprofile_use_
:
2151 opts
->x_profile_data_prefix
= xstrdup (arg
);
2152 opts
->x_flag_profile_use
= true;
2154 /* No break here - do -fprofile-use processing. */
2156 case OPT_fprofile_use
:
2157 enable_fdo_optimizations (opts
, opts_set
, value
);
2158 if (!opts_set
->x_flag_profile_reorder_functions
)
2159 opts
->x_flag_profile_reorder_functions
= value
;
2160 /* Indirect call profiling should do all useful transformations
2161 speculative devirtualization does. */
2162 if (!opts_set
->x_flag_devirtualize_speculatively
2163 && opts
->x_flag_value_profile_transformations
)
2164 opts
->x_flag_devirtualize_speculatively
= false;
2167 case OPT_fauto_profile_
:
2168 opts
->x_auto_profile_file
= xstrdup (arg
);
2169 opts
->x_flag_auto_profile
= true;
2171 /* No break here - do -fauto-profile processing. */
2173 case OPT_fauto_profile
:
2174 enable_fdo_optimizations (opts
, opts_set
, value
);
2175 if (!opts_set
->x_flag_profile_correction
)
2176 opts
->x_flag_profile_correction
= value
;
2177 maybe_set_param_value (
2178 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
2179 opts
->x_param_values
, opts_set
->x_param_values
);
2182 case OPT_fprofile_generate_
:
2183 opts
->x_profile_data_prefix
= xstrdup (arg
);
2185 /* No break here - do -fprofile-generate processing. */
2187 case OPT_fprofile_generate
:
2188 if (!opts_set
->x_profile_arc_flag
)
2189 opts
->x_profile_arc_flag
= value
;
2190 if (!opts_set
->x_flag_profile_values
)
2191 opts
->x_flag_profile_values
= value
;
2192 if (!opts_set
->x_flag_inline_functions
)
2193 opts
->x_flag_inline_functions
= value
;
2194 if (!opts_set
->x_flag_ipa_bit_cp
)
2195 opts
->x_flag_ipa_bit_cp
= value
;
2196 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2197 quadratic. Disable the pass until better memory representation
2199 if (!opts_set
->x_flag_ipa_reference
)
2200 opts
->x_flag_ipa_reference
= false;
2203 case OPT_ftree_vectorize
:
2204 if (!opts_set
->x_flag_tree_loop_vectorize
)
2205 opts
->x_flag_tree_loop_vectorize
= value
;
2206 if (!opts_set
->x_flag_tree_slp_vectorize
)
2207 opts
->x_flag_tree_slp_vectorize
= value
;
2209 case OPT_fshow_column
:
2210 dc
->show_column
= value
;
2213 case OPT_frandom_seed
:
2214 /* The real switch is -fno-random-seed. */
2220 case OPT_frandom_seed_
:
2224 case OPT_fsched_verbose_
:
2225 #ifdef INSN_SCHEDULING
2226 /* Handled with Var in common.opt. */
2232 case OPT_fsched_stalled_insns_
:
2233 opts
->x_flag_sched_stalled_insns
= value
;
2234 if (opts
->x_flag_sched_stalled_insns
== 0)
2235 opts
->x_flag_sched_stalled_insns
= -1;
2238 case OPT_fsched_stalled_insns_dep_
:
2239 opts
->x_flag_sched_stalled_insns_dep
= value
;
2242 case OPT_fstack_check_
:
2243 if (!strcmp (arg
, "no"))
2244 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2245 else if (!strcmp (arg
, "generic"))
2246 /* This is the old stack checking method. */
2247 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2248 ? FULL_BUILTIN_STACK_CHECK
2249 : GENERIC_STACK_CHECK
;
2250 else if (!strcmp (arg
, "specific"))
2251 /* This is the new stack checking method. */
2252 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2253 ? FULL_BUILTIN_STACK_CHECK
2254 : STACK_CHECK_STATIC_BUILTIN
2255 ? STATIC_BUILTIN_STACK_CHECK
2256 : GENERIC_STACK_CHECK
;
2258 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2261 case OPT_fstack_limit
:
2262 /* The real switch is -fno-stack-limit. */
2268 case OPT_fstack_limit_register_
:
2269 case OPT_fstack_limit_symbol_
:
2273 case OPT_fstack_usage
:
2274 opts
->x_flag_stack_usage
= value
;
2275 opts
->x_flag_stack_usage_info
= value
!= 0;
2279 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2284 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2288 if (arg
&& strlen (arg
) != 0)
2290 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2291 "use %<-gdwarf-%s%> for DWARF version "
2292 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2296 value
= opts
->x_dwarf_version
;
2300 if (value
< 2 || value
> 5)
2301 error_at (loc
, "dwarf version %d is not supported", value
);
2303 opts
->x_dwarf_version
= value
;
2304 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2307 case OPT_gsplit_dwarf
:
2308 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2313 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2318 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2323 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2328 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2334 /* Handled completely via specs. */
2337 case OPT_pedantic_errors
:
2338 dc
->pedantic_errors
= 1;
2339 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2341 handlers
, opts
, opts_set
,
2346 opts
->x_flag_lto
= value
? "" : NULL
;
2350 dc
->dc_inhibit_warnings
= true;
2353 case OPT_fmax_errors_
:
2354 dc
->max_errors
= value
;
2357 case OPT_fuse_ld_bfd
:
2358 case OPT_fuse_ld_gold
:
2359 case OPT_fuse_linker_plugin
:
2360 /* No-op. Used by the driver and passed to us because it starts with f.*/
2365 opts
->x_flag_trapv
= 0;
2370 opts
->x_flag_wrapv
= 0;
2374 opts
->x_flag_ipa_icf_functions
= value
;
2375 opts
->x_flag_ipa_icf_variables
= value
;
2379 /* If the flag was handled in a standard way, assume the lack of
2380 processing here is intentional. */
2381 gcc_assert (option_flag_var (scode
, opts
));
2385 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2390 /* Handle --param NAME=VALUE. */
2392 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2393 location_t loc
, const char *carg
)
2398 arg
= xstrdup (carg
);
2399 equal
= strchr (arg
, '=');
2401 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2407 enum compiler_param index
;
2408 if (!find_param (arg
, &index
))
2410 const char *suggestion
= find_param_fuzzy (arg
);
2412 error_at (loc
, "invalid --param name %qs; did you mean %qs?",
2415 error_at (loc
, "invalid --param name %qs", arg
);
2419 if (!param_string_value_p (index
, equal
+ 1, &value
))
2420 value
= integral_argument (equal
+ 1);
2423 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2425 set_param_value (arg
, value
,
2426 opts
->x_param_values
, opts_set
->x_param_values
);
2433 /* Used to set the level of strict aliasing warnings in OPTS,
2434 when no level is specified (i.e., when -Wstrict-aliasing, and not
2435 -Wstrict-aliasing=level was given).
2436 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2437 and 0 otherwise. After calling this function, wstrict_aliasing will be
2438 set to the default value of -Wstrict_aliasing=level, currently 3. */
2440 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2442 gcc_assert (onoff
== 0 || onoff
== 1);
2444 opts
->x_warn_strict_aliasing
= 3;
2446 opts
->x_warn_strict_aliasing
= 0;
2449 /* The following routines are useful in setting all the flags that
2450 -ffast-math and -fno-fast-math imply. */
2452 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2454 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2456 opts
->x_flag_unsafe_math_optimizations
= set
;
2457 set_unsafe_math_optimizations_flags (opts
, set
);
2459 if (!opts
->frontend_set_flag_finite_math_only
)
2460 opts
->x_flag_finite_math_only
= set
;
2461 if (!opts
->frontend_set_flag_errno_math
)
2462 opts
->x_flag_errno_math
= !set
;
2465 if (opts
->frontend_set_flag_excess_precision_cmdline
2466 == EXCESS_PRECISION_DEFAULT
)
2467 opts
->x_flag_excess_precision_cmdline
2468 = set
? EXCESS_PRECISION_FAST
: EXCESS_PRECISION_DEFAULT
;
2469 if (!opts
->frontend_set_flag_signaling_nans
)
2470 opts
->x_flag_signaling_nans
= 0;
2471 if (!opts
->frontend_set_flag_rounding_math
)
2472 opts
->x_flag_rounding_math
= 0;
2473 if (!opts
->frontend_set_flag_cx_limited_range
)
2474 opts
->x_flag_cx_limited_range
= 1;
2478 /* When -funsafe-math-optimizations is set the following
2479 flags are set as well. */
2481 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2483 if (!opts
->frontend_set_flag_trapping_math
)
2484 opts
->x_flag_trapping_math
= !set
;
2485 if (!opts
->frontend_set_flag_signed_zeros
)
2486 opts
->x_flag_signed_zeros
= !set
;
2487 if (!opts
->frontend_set_flag_associative_math
)
2488 opts
->x_flag_associative_math
= set
;
2489 if (!opts
->frontend_set_flag_reciprocal_math
)
2490 opts
->x_flag_reciprocal_math
= set
;
2493 /* Return true iff flags in OPTS are set as if -ffast-math. */
2495 fast_math_flags_set_p (const struct gcc_options
*opts
)
2497 return (!opts
->x_flag_trapping_math
2498 && opts
->x_flag_unsafe_math_optimizations
2499 && opts
->x_flag_finite_math_only
2500 && !opts
->x_flag_signed_zeros
2501 && !opts
->x_flag_errno_math
2502 && opts
->x_flag_excess_precision_cmdline
2503 == EXCESS_PRECISION_FAST
);
2506 /* Return true iff flags are set as if -ffast-math but using the flags stored
2507 in the struct cl_optimization structure. */
2509 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2511 return (!opt
->x_flag_trapping_math
2512 && opt
->x_flag_unsafe_math_optimizations
2513 && opt
->x_flag_finite_math_only
2514 && !opt
->x_flag_signed_zeros
2515 && !opt
->x_flag_errno_math
);
2518 /* Handle a debug output -g switch for options OPTS
2519 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2520 explicitly), location LOC. EXTENDED is true or false to support
2521 extended output (2 is special and means "-ggdb" was given). */
2523 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2524 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2527 opts
->x_use_gnu_debug_info_extensions
= extended
;
2529 if (type
== NO_DEBUG
)
2531 if (opts
->x_write_symbols
== NO_DEBUG
)
2533 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2537 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2538 opts
->x_write_symbols
= DWARF2_DEBUG
;
2539 #elif defined DBX_DEBUGGING_INFO
2540 opts
->x_write_symbols
= DBX_DEBUG
;
2544 if (opts
->x_write_symbols
== NO_DEBUG
)
2545 warning_at (loc
, 0, "target system does not support debug output");
2550 /* Does it conflict with an already selected type? */
2551 if (opts_set
->x_write_symbols
!= NO_DEBUG
2552 && opts
->x_write_symbols
!= NO_DEBUG
2553 && type
!= opts
->x_write_symbols
)
2554 error_at (loc
, "debug format %qs conflicts with prior selection",
2555 debug_type_names
[type
]);
2556 opts
->x_write_symbols
= type
;
2557 opts_set
->x_write_symbols
= type
;
2560 /* A debug flag without a level defaults to level 2.
2561 If off or at level 1, set it to level 2, but if already
2562 at level 3, don't lower it. */
2565 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2566 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2570 int argval
= integral_argument (arg
);
2572 error_at (loc
, "unrecognized debug output level %qs", arg
);
2573 else if (argval
> 3)
2574 error_at (loc
, "debug output level %qs is too high", arg
);
2576 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2580 /* Arrange to dump core on error for diagnostic context DC. (The
2581 regular error message is still printed first, except in the case of
2585 setup_core_dumping (diagnostic_context
*dc
)
2588 signal (SIGABRT
, SIG_DFL
);
2590 #if defined(HAVE_SETRLIMIT)
2593 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2594 fatal_error (input_location
, "getting core file size maximum limit: %m");
2595 rlim
.rlim_cur
= rlim
.rlim_max
;
2596 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2597 fatal_error (input_location
,
2598 "setting core file size limit to maximum: %m");
2601 diagnostic_abort_on_error (dc
);
2604 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2605 diagnostic context DC. */
2608 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2609 location_t loc
, diagnostic_context
*dc
)
2617 opts
->x_flag_debug_asm
= 1;
2620 opts
->x_flag_print_asm_name
= 1;
2623 opts
->x_flag_dump_rtl_in_asm
= 1;
2624 opts
->x_flag_print_asm_name
= 1;
2627 opts
->x_rtl_dump_and_exit
= 1;
2629 case 'D': /* These are handled by the preprocessor. */
2636 setup_core_dumping (dc
);
2639 opts
->x_flag_dump_all_passed
= true;
2643 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2648 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2649 mask LANG_MASK, option handlers HANDLERS) as an error for option
2650 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2651 NULL), location LOC. This is used by -Werror=. */
2654 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2655 const struct cl_option_handlers
*handlers
,
2656 struct gcc_options
*opts
,
2657 struct gcc_options
*opts_set
,
2658 location_t loc
, diagnostic_context
*dc
)
2663 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2664 new_option
[0] = 'W';
2665 strcpy (new_option
+ 1, arg
);
2666 option_index
= find_opt (new_option
, lang_mask
);
2667 if (option_index
== OPT_SPECIAL_unknown
)
2668 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2669 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2670 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2674 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2675 const char *arg
= NULL
;
2677 if (cl_options
[option_index
].flags
& CL_JOINED
)
2678 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2679 control_warning_option (option_index
, (int) kind
, arg
, value
,
2681 handlers
, opts
, opts_set
, dc
);
2686 /* Return malloced memory for the name of the option OPTION_INDEX
2687 which enabled a diagnostic (context CONTEXT), originally of type
2688 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2692 option_name (diagnostic_context
*context
, int option_index
,
2693 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2697 /* A warning classified as an error. */
2698 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2699 && diag_kind
== DK_ERROR
)
2700 return concat (cl_options
[OPT_Werror_
].opt_text
,
2701 /* Skip over "-W". */
2702 cl_options
[option_index
].opt_text
+ 2,
2704 /* A warning with option. */
2706 return xstrdup (cl_options
[option_index
].opt_text
);
2708 /* A warning without option classified as an error. */
2709 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2710 || diag_kind
== DK_WARNING
)
2711 && context
->warning_as_error_requested
)
2712 return xstrdup (cl_options
[OPT_Werror
].opt_text
);