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 five characters. (Java uses ".class".) */
145 strip_off_ending (char *name
, int len
)
148 for (i
= 2; i
< 6 && 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 linker plugin");
899 opts
->x_flag_fat_lto_objects
= 1;
903 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
904 default value if they choose based on other options. */
905 if (opts
->x_flag_split_stack
== -1)
906 opts
->x_flag_split_stack
= 0;
907 else if (opts
->x_flag_split_stack
)
909 if (!targetm_common
.supports_split_stack (true, opts
))
911 error_at (loc
, "%<-fsplit-stack%> is not supported by "
912 "this compiler configuration");
913 opts
->x_flag_split_stack
= 0;
917 /* If stack splitting is turned on, and the user did not explicitly
918 request function partitioning, turn off partitioning, as it
919 confuses the linker when trying to handle partitioned split-stack
920 code that calls a non-split-stack functions. But if partitioning
921 was turned on explicitly just hope for the best. */
922 if (opts
->x_flag_split_stack
923 && opts
->x_flag_reorder_blocks_and_partition
924 && !opts_set
->x_flag_reorder_blocks_and_partition
)
925 opts
->x_flag_reorder_blocks_and_partition
= 0;
927 if (opts
->x_flag_reorder_blocks_and_partition
928 && !opts_set
->x_flag_reorder_functions
)
929 opts
->x_flag_reorder_functions
= 1;
931 /* Tune vectorization related parametees according to cost model. */
932 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
934 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
935 6, opts
->x_param_values
, opts_set
->x_param_values
);
936 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
937 0, opts
->x_param_values
, opts_set
->x_param_values
);
938 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
939 0, opts
->x_param_values
, opts_set
->x_param_values
);
942 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
944 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
945 || !opts
->x_flag_tree_loop_if_convert
)
946 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
947 opts
->x_param_values
, opts_set
->x_param_values
);
949 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
950 if (opts
->x_dwarf_split_debug_info
)
951 opts
->x_debug_generate_pub_sections
= 2;
953 /* Userspace and kernel ASan conflict with each other. */
954 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
955 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
957 "-fsanitize=address is incompatible with "
958 "-fsanitize=kernel-address");
961 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
962 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
964 "-fsanitize=address and -fsanitize=kernel-address "
965 "are incompatible with -fsanitize=thread");
967 if ((opts
->x_flag_sanitize
& SANITIZE_LEAK
)
968 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
970 "-fsanitize=leak is incompatible with -fsanitize=thread");
972 /* Check error recovery for -fsanitize-recover option. */
973 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
974 if ((opts
->x_flag_sanitize_recover
& sanitizer_opts
[i
].flag
)
975 && !sanitizer_opts
[i
].can_recover
)
976 error_at (loc
, "-fsanitize-recover=%s is not supported",
977 sanitizer_opts
[i
].name
);
979 /* When instrumenting the pointers, we don't want to remove
980 the null pointer checks. */
981 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
982 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
983 opts
->x_flag_delete_null_pointer_checks
= 0;
985 /* Aggressive compiler optimizations may cause false negatives. */
986 if (opts
->x_flag_sanitize
& ~(SANITIZE_LEAK
| SANITIZE_UNREACHABLE
))
987 opts
->x_flag_aggressive_loop_optimizations
= 0;
989 /* Enable -fsanitize-address-use-after-scope if address sanitizer is
991 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
992 && !opts_set
->x_flag_sanitize_address_use_after_scope
)
993 opts
->x_flag_sanitize_address_use_after_scope
= true;
995 /* Force -fstack-reuse=none in case -fsanitize-address-use-after-scope
997 if (opts
->x_flag_sanitize_address_use_after_scope
)
999 if (opts
->x_flag_stack_reuse
!= SR_NONE
1000 && opts_set
->x_flag_stack_reuse
!= SR_NONE
)
1002 "-fsanitize-address-use-after-scope requires "
1003 "-fstack-reuse=none option");
1005 opts
->x_flag_stack_reuse
= SR_NONE
;
1009 #define LEFT_COLUMN 27
1011 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1012 followed by word-wrapped HELP in a second column. */
1014 wrap_help (const char *help
,
1016 unsigned int item_width
,
1017 unsigned int columns
)
1019 unsigned int col_width
= LEFT_COLUMN
;
1020 unsigned int remaining
, room
, len
;
1022 remaining
= strlen (help
);
1026 room
= columns
- 3 - MAX (col_width
, item_width
);
1035 for (i
= 0; help
[i
]; i
++)
1037 if (i
>= room
&& len
!= remaining
)
1041 else if ((help
[i
] == '-' || help
[i
] == '/')
1042 && help
[i
+ 1] != ' '
1043 && i
> 0 && ISALPHA (help
[i
- 1]))
1048 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1050 while (help
[len
] == ' ')
1058 /* Print help for a specific front-end, etc. */
1060 print_filtered_help (unsigned int include_flags
,
1061 unsigned int exclude_flags
,
1062 unsigned int any_flags
,
1063 unsigned int columns
,
1064 struct gcc_options
*opts
,
1065 unsigned int lang_mask
)
1070 bool displayed
= false;
1073 if (include_flags
== CL_PARAMS
)
1075 for (i
= 0; i
< LAST_PARAM
; i
++)
1077 const char *param
= compiler_params
[i
].option
;
1079 help
= compiler_params
[i
].help
;
1080 if (help
== NULL
|| *help
== '\0')
1082 if (exclude_flags
& CL_UNDOCUMENTED
)
1084 help
= undocumented_msg
;
1087 /* Get the translation. */
1090 if (!opts
->x_quiet_flag
)
1092 snprintf (new_help
, sizeof (new_help
),
1093 _("default %d minimum %d maximum %d"),
1094 compiler_params
[i
].default_value
,
1095 compiler_params
[i
].min_value
,
1096 compiler_params
[i
].max_value
);
1099 wrap_help (help
, param
, strlen (param
), columns
);
1105 if (!opts
->x_help_printed
)
1106 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1108 if (!opts
->x_help_enum_printed
)
1109 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1111 for (i
= 0; i
< cl_options_count
; i
++)
1113 const struct cl_option
*option
= cl_options
+ i
;
1118 if (include_flags
== 0
1119 || ((option
->flags
& include_flags
) != include_flags
))
1121 if ((option
->flags
& any_flags
) == 0)
1125 /* Skip unwanted switches. */
1126 if ((option
->flags
& exclude_flags
) != 0)
1129 /* The driver currently prints its own help text. */
1130 if ((option
->flags
& CL_DRIVER
) != 0
1131 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1132 | CL_COMMON
| CL_TARGET
)) == 0)
1136 /* Skip switches that have already been printed. */
1137 if (opts
->x_help_printed
[i
])
1140 opts
->x_help_printed
[i
] = true;
1142 help
= option
->help
;
1145 if (exclude_flags
& CL_UNDOCUMENTED
)
1148 help
= undocumented_msg
;
1151 if (option
->alias_target
< N_OPTS
1152 && cl_options
[option
->alias_target
].help
)
1154 if (help
== undocumented_msg
)
1156 /* For undocumented options that are aliases for other options
1157 that are documented, point the reader to the other option in
1158 preference of the former. */
1159 snprintf (new_help
, sizeof new_help
,
1160 _("Same as %s. Use the latter option instead."),
1161 cl_options
[option
->alias_target
].opt_text
);
1165 /* For documented options with aliases, mention the aliased
1166 option's name for reference. */
1167 snprintf (new_help
, sizeof new_help
,
1168 _("%s Same as %s."),
1169 help
, cl_options
[option
->alias_target
].opt_text
);
1175 if (option
->warn_message
)
1177 /* Mention that the use of the option will trigger a warning. */
1178 if (help
== new_help
)
1179 snprintf (new_help
+ strlen (new_help
),
1180 sizeof new_help
- strlen (new_help
),
1181 " %s", _(use_diagnosed_msg
));
1183 snprintf (new_help
, sizeof new_help
,
1184 "%s %s", help
, _(use_diagnosed_msg
));
1189 /* Get the translation. */
1192 /* Find the gap between the name of the
1193 option and its descriptive text. */
1194 tab
= strchr (help
, '\t');
1203 opt
= option
->opt_text
;
1207 /* With the -Q option enabled we change the descriptive text associated
1208 with an option to be an indication of its current setting. */
1209 if (!opts
->x_quiet_flag
)
1211 void *flag_var
= option_flag_var (i
, opts
);
1213 if (len
< (LEFT_COLUMN
+ 2))
1214 strcpy (new_help
, "\t\t");
1216 strcpy (new_help
, "\t");
1218 if (flag_var
!= NULL
1219 && option
->var_type
!= CLVC_DEFER
)
1221 if (option
->flags
& CL_JOINED
)
1223 if (option
->var_type
== CLVC_STRING
)
1225 if (* (const char **) flag_var
!= NULL
)
1226 snprintf (new_help
+ strlen (new_help
),
1227 sizeof (new_help
) - strlen (new_help
),
1228 "%s", * (const char **) flag_var
);
1230 else if (option
->var_type
== CLVC_ENUM
)
1232 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1234 const char *arg
= NULL
;
1236 value
= e
->get (flag_var
);
1237 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1239 arg
= _("[default]");
1240 snprintf (new_help
+ strlen (new_help
),
1241 sizeof (new_help
) - strlen (new_help
),
1245 sprintf (new_help
+ strlen (new_help
),
1246 "%d", * (int *) flag_var
);
1249 strcat (new_help
, option_enabled (i
, opts
)
1250 ? _("[enabled]") : _("[disabled]"));
1256 if (option
->range_max
!= -1)
1259 snprintf (b
, sizeof (b
), "<%d,%d>", option
->range_min
,
1261 opt
= concat (opt
, b
, NULL
);
1265 wrap_help (help
, opt
, len
, columns
);
1268 if (option
->var_type
== CLVC_ENUM
1269 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1270 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1275 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1278 printf (_(" No options with the desired characteristics were found\n"));
1283 /* PR 31349: Tell the user how to see all of the
1284 options supported by a specific front end. */
1285 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1286 if ((1U << i
) & langs
)
1287 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1288 lang_names
[i
], lang_names
[i
]);
1292 else if (! displayed
)
1293 printf (_(" All options with the desired characteristics have already been displayed\n"));
1297 /* Print details of enumerated option arguments, if those
1298 enumerations have help text headings provided. If no help text
1299 is provided, presume that the possible values are listed in the
1300 help text for the relevant options. */
1301 for (i
= 0; i
< cl_enums_count
; i
++)
1303 unsigned int j
, pos
;
1305 if (opts
->x_help_enum_printed
[i
] != 1)
1307 if (cl_enums
[i
].help
== NULL
)
1309 printf (" %s\n ", _(cl_enums
[i
].help
));
1311 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1313 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1315 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1317 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1327 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1332 opts
->x_help_enum_printed
[i
] = 2;
1336 /* Display help for a specified type of option.
1337 The options must have ALL of the INCLUDE_FLAGS set
1338 ANY of the flags in the ANY_FLAGS set
1339 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1340 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1342 print_specific_help (unsigned int include_flags
,
1343 unsigned int exclude_flags
,
1344 unsigned int any_flags
,
1345 struct gcc_options
*opts
,
1346 unsigned int lang_mask
)
1348 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1349 const char * description
= NULL
;
1350 const char * descrip_extra
= "";
1354 /* Sanity check: Make sure that we do not have more
1355 languages than we have bits available to enumerate them. */
1356 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1358 /* If we have not done so already, obtain
1359 the desired maximum width of the output. */
1360 if (opts
->x_help_columns
== 0)
1362 opts
->x_help_columns
= get_terminal_width ();
1363 if (opts
->x_help_columns
== INT_MAX
)
1364 /* Use a reasonable default. */
1365 opts
->x_help_columns
= 80;
1368 /* Decide upon the title for the options that we are going to display. */
1369 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1371 switch (flag
& include_flags
)
1378 description
= _("The following options are target specific");
1381 description
= _("The following options control compiler warning messages");
1383 case CL_OPTIMIZATION
:
1384 description
= _("The following options control optimizations");
1387 description
= _("The following options are language-independent");
1390 description
= _("The --param option recognizes the following as parameters");
1393 if (i
>= cl_lang_count
)
1395 if (exclude_flags
& all_langs_mask
)
1396 description
= _("The following options are specific to just the language ");
1398 description
= _("The following options are supported by the language ");
1399 descrip_extra
= lang_names
[i
];
1404 if (description
== NULL
)
1408 if (include_flags
& CL_UNDOCUMENTED
)
1409 description
= _("The following options are not documented");
1410 else if (include_flags
& CL_SEPARATE
)
1411 description
= _("The following options take separate arguments");
1412 else if (include_flags
& CL_JOINED
)
1413 description
= _("The following options take joined arguments");
1416 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1423 if (any_flags
& all_langs_mask
)
1424 description
= _("The following options are language-related");
1426 description
= _("The following options are language-independent");
1430 printf ("%s%s:\n", description
, descrip_extra
);
1431 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1432 opts
->x_help_columns
, opts
, lang_mask
);
1435 /* Enable FDO-related flags. */
1438 enable_fdo_optimizations (struct gcc_options
*opts
,
1439 struct gcc_options
*opts_set
,
1442 if (!opts_set
->x_flag_branch_probabilities
)
1443 opts
->x_flag_branch_probabilities
= value
;
1444 if (!opts_set
->x_flag_profile_values
)
1445 opts
->x_flag_profile_values
= value
;
1446 if (!opts_set
->x_flag_unroll_loops
)
1447 opts
->x_flag_unroll_loops
= value
;
1448 if (!opts_set
->x_flag_peel_loops
)
1449 opts
->x_flag_peel_loops
= value
;
1450 if (!opts_set
->x_flag_tracer
)
1451 opts
->x_flag_tracer
= value
;
1452 if (!opts_set
->x_flag_value_profile_transformations
)
1453 opts
->x_flag_value_profile_transformations
= value
;
1454 if (!opts_set
->x_flag_inline_functions
)
1455 opts
->x_flag_inline_functions
= value
;
1456 if (!opts_set
->x_flag_ipa_cp
)
1457 opts
->x_flag_ipa_cp
= value
;
1458 if (!opts_set
->x_flag_ipa_cp_clone
1459 && value
&& opts
->x_flag_ipa_cp
)
1460 opts
->x_flag_ipa_cp_clone
= value
;
1461 if (!opts_set
->x_flag_ipa_bit_cp
1462 && value
&& opts
->x_flag_ipa_cp
)
1463 opts
->x_flag_ipa_bit_cp
= value
;
1464 if (!opts_set
->x_flag_predictive_commoning
)
1465 opts
->x_flag_predictive_commoning
= value
;
1466 if (!opts_set
->x_flag_split_loops
)
1467 opts
->x_flag_split_loops
= value
;
1468 if (!opts_set
->x_flag_unswitch_loops
)
1469 opts
->x_flag_unswitch_loops
= value
;
1470 if (!opts_set
->x_flag_gcse_after_reload
)
1471 opts
->x_flag_gcse_after_reload
= value
;
1472 if (!opts_set
->x_flag_tree_loop_vectorize
1473 && !opts_set
->x_flag_tree_vectorize
)
1474 opts
->x_flag_tree_loop_vectorize
= value
;
1475 if (!opts_set
->x_flag_tree_slp_vectorize
1476 && !opts_set
->x_flag_tree_vectorize
)
1477 opts
->x_flag_tree_slp_vectorize
= value
;
1478 if (!opts_set
->x_flag_vect_cost_model
)
1479 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1480 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1481 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1484 /* -f{,no-}sanitize{,-recover}= suboptions. */
1485 const struct sanitizer_opts_s sanitizer_opts
[] =
1487 #define SANITIZER_OPT(name, flags, recover) \
1488 { #name, flags, sizeof #name - 1, recover }
1489 SANITIZER_OPT (address
, (SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
), true),
1490 SANITIZER_OPT (kernel
-address
, (SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
),
1492 SANITIZER_OPT (thread
, SANITIZE_THREAD
, false),
1493 SANITIZER_OPT (leak
, SANITIZE_LEAK
, false),
1494 SANITIZER_OPT (shift
, SANITIZE_SHIFT
, true),
1495 SANITIZER_OPT (shift
-base
, SANITIZE_SHIFT_BASE
, true),
1496 SANITIZER_OPT (shift
-exponent
, SANITIZE_SHIFT_EXPONENT
, true),
1497 SANITIZER_OPT (integer
-divide
-by
-zero
, SANITIZE_DIVIDE
, true),
1498 SANITIZER_OPT (undefined
, SANITIZE_UNDEFINED
, true),
1499 SANITIZER_OPT (unreachable
, SANITIZE_UNREACHABLE
, false),
1500 SANITIZER_OPT (vla
-bound
, SANITIZE_VLA
, true),
1501 SANITIZER_OPT (return, SANITIZE_RETURN
, false),
1502 SANITIZER_OPT (null
, SANITIZE_NULL
, true),
1503 SANITIZER_OPT (signed-integer
-overflow
, SANITIZE_SI_OVERFLOW
, true),
1504 SANITIZER_OPT (bool, SANITIZE_BOOL
, true),
1505 SANITIZER_OPT (enum, SANITIZE_ENUM
, true),
1506 SANITIZER_OPT (float-divide
-by
-zero
, SANITIZE_FLOAT_DIVIDE
, true),
1507 SANITIZER_OPT (float-cast
-overflow
, SANITIZE_FLOAT_CAST
, true),
1508 SANITIZER_OPT (bounds
, SANITIZE_BOUNDS
, true),
1509 SANITIZER_OPT (bounds
-strict
, SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
, true),
1510 SANITIZER_OPT (alignment
, SANITIZE_ALIGNMENT
, true),
1511 SANITIZER_OPT (nonnull
-attribute
, SANITIZE_NONNULL_ATTRIBUTE
, true),
1512 SANITIZER_OPT (returns
-nonnull
-attribute
, SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1514 SANITIZER_OPT (object
-size
, SANITIZE_OBJECT_SIZE
, true),
1515 SANITIZER_OPT (vptr
, SANITIZE_VPTR
, true),
1516 SANITIZER_OPT (all
, ~0U, true),
1517 #undef SANITIZER_OPT
1518 { NULL
, 0U, 0UL, false }
1521 /* A struct for describing a run of chars within a string. */
1523 struct string_fragment
1525 string_fragment (const char *start
, size_t len
)
1526 : m_start (start
), m_len (len
) {}
1528 const char *m_start
;
1532 /* Specialization of edit_distance_traits for string_fragment,
1533 for use by get_closest_sanitizer_option. */
1536 struct edit_distance_traits
<const string_fragment
&>
1538 static size_t get_length (const string_fragment
&fragment
)
1540 return fragment
.m_len
;
1543 static const char *get_string (const string_fragment
&fragment
)
1545 return fragment
.m_start
;
1549 /* Given ARG, an unrecognized sanitizer option, return the best
1550 matching sanitizer option, or NULL if there isn't one.
1551 CODE is OPT_fsanitize_ or OPT_fsanitize_recover_.
1552 VALUE is non-zero for the regular form of the option, zero
1553 for the "no-" form (e.g. "-fno-sanitize-recover="). */
1556 get_closest_sanitizer_option (const string_fragment
&arg
,
1557 enum opt_code code
, int value
)
1559 best_match
<const string_fragment
&, const char*> bm (arg
);
1560 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1562 /* -fsanitize=all is not valid, so don't offer it. */
1563 if (sanitizer_opts
[i
].flag
== ~0U
1564 && code
== OPT_fsanitize_
1568 /* For -fsanitize-recover= (and not -fno-sanitize-recover=),
1569 don't offer the non-recoverable options. */
1570 if (!sanitizer_opts
[i
].can_recover
1571 && code
== OPT_fsanitize_recover_
1575 bm
.consider (sanitizer_opts
[i
].name
);
1577 return bm
.get_best_meaningful_candidate ();
1580 /* Parse comma separated sanitizer suboptions from P for option SCODE,
1581 adjust previous FLAGS and return new ones. If COMPLAIN is false,
1582 don't issue diagnostics. */
1585 parse_sanitizer_options (const char *p
, location_t loc
, int scode
,
1586 unsigned int flags
, int value
, bool complain
)
1588 enum opt_code code
= (enum opt_code
) scode
;
1593 const char *comma
= strchr (p
, ',');
1605 /* Check to see if the string matches an option class name. */
1606 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1607 if (len
== sanitizer_opts
[i
].len
1608 && memcmp (p
, sanitizer_opts
[i
].name
, len
) == 0)
1610 /* Handle both -fsanitize and -fno-sanitize cases. */
1611 if (value
&& sanitizer_opts
[i
].flag
== ~0U)
1613 if (code
== OPT_fsanitize_
)
1616 error_at (loc
, "-fsanitize=all option is not valid");
1619 flags
|= ~(SANITIZE_THREAD
| SANITIZE_LEAK
1620 | SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1624 /* Do not enable -fsanitize-recover=unreachable and
1625 -fsanitize-recover=return if -fsanitize-recover=undefined
1627 if (code
== OPT_fsanitize_recover_
1628 && sanitizer_opts
[i
].flag
== SANITIZE_UNDEFINED
)
1629 flags
|= (SANITIZE_UNDEFINED
1630 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
));
1632 flags
|= sanitizer_opts
[i
].flag
;
1635 flags
&= ~sanitizer_opts
[i
].flag
;
1640 if (! found
&& complain
)
1643 = get_closest_sanitizer_option (string_fragment (p
, len
),
1648 "unrecognized argument to -f%ssanitize%s= option: %q.*s;"
1649 " did you mean %qs?",
1651 code
== OPT_fsanitize_
? "" : "-recover",
1652 (int) len
, p
, hint
);
1655 "unrecognized argument to -f%ssanitize%s= option: %q.*s",
1657 code
== OPT_fsanitize_
? "" : "-recover",
1668 /* Parse string values of no_sanitize attribute passed in VALUE.
1669 Values are separated with comma. Wrong argument is stored to
1670 WRONG_ARGUMENT variable. */
1673 parse_no_sanitize_attribute (char *value
, char **wrong_argument
)
1675 unsigned int flags
= 0;
1677 char *q
= strtok (value
, ",");
1681 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1682 if (strcmp (sanitizer_opts
[i
].name
, q
) == 0)
1684 flags
|= sanitizer_opts
[i
].flag
;
1685 if (sanitizer_opts
[i
].flag
== SANITIZE_UNDEFINED
)
1686 flags
|= SANITIZE_UNDEFINED_NONDEFAULT
;
1690 if (sanitizer_opts
[i
].name
== NULL
)
1691 *wrong_argument
= q
;
1693 q
= strtok (NULL
, ",");
1699 /* Handle target- and language-independent options. Return zero to
1700 generate an "unknown option" message. Only options that need
1701 extra handling need to be listed here; if you simply want
1702 DECODED->value assigned to a variable, it happens automatically. */
1705 common_handle_option (struct gcc_options
*opts
,
1706 struct gcc_options
*opts_set
,
1707 const struct cl_decoded_option
*decoded
,
1708 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1710 const struct cl_option_handlers
*handlers
,
1711 diagnostic_context
*dc
)
1713 size_t scode
= decoded
->opt_index
;
1714 const char *arg
= decoded
->arg
;
1715 int value
= decoded
->value
;
1716 enum opt_code code
= (enum opt_code
) scode
;
1718 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1723 handle_param (opts
, opts_set
, loc
, arg
);
1728 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1729 unsigned int undoc_mask
;
1732 if (lang_mask
== CL_DRIVER
)
1735 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1738 /* First display any single language specific options. */
1739 for (i
= 0; i
< cl_lang_count
; i
++)
1741 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1743 /* Next display any multi language specific options. */
1744 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1745 /* Then display any remaining, non-language options. */
1746 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1748 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1749 opts
->x_exit_after_options
= true;
1753 case OPT__target_help
:
1754 if (lang_mask
== CL_DRIVER
)
1757 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1758 opts
->x_exit_after_options
= true;
1763 const char *a
= arg
;
1764 unsigned int include_flags
= 0;
1765 /* Note - by default we include undocumented options when listing
1766 specific classes. If you only want to see documented options
1767 then add ",^undocumented" to the --help= option. E.g.:
1769 --help=target,^undocumented */
1770 unsigned int exclude_flags
= 0;
1772 if (lang_mask
== CL_DRIVER
)
1775 /* Walk along the argument string, parsing each word in turn.
1777 arg = [^]{word}[,{arg}]
1778 word = {optimizers|target|warnings|undocumented|
1779 params|common|<language>} */
1789 { "optimizers", CL_OPTIMIZATION
},
1790 { "target", CL_TARGET
},
1791 { "warnings", CL_WARNING
},
1792 { "undocumented", CL_UNDOCUMENTED
},
1793 { "params", CL_PARAMS
},
1794 { "joined", CL_JOINED
},
1795 { "separate", CL_SEPARATE
},
1796 { "common", CL_COMMON
},
1799 unsigned int *pflags
;
1801 unsigned int lang_flag
, specific_flag
;
1810 error_at (loc
, "missing argument to %qs", "--help=^");
1813 pflags
= &exclude_flags
;
1816 pflags
= &include_flags
;
1818 comma
= strchr (a
, ',');
1829 /* Check to see if the string matches an option class name. */
1830 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1831 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1833 specific_flag
= specifics
[i
].flag
;
1837 /* Check to see if the string matches a language name.
1838 Note - we rely upon the alpha-sorted nature of the entries in
1839 the lang_names array, specifically that shorter names appear
1840 before their longer variants. (i.e. C before C++). That way
1841 when we are attempting to match --help=c for example we will
1842 match with C first and not C++. */
1843 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1844 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1846 lang_flag
= 1U << i
;
1850 if (specific_flag
!= 0)
1853 *pflags
|= specific_flag
;
1856 /* The option's argument matches both the start of a
1857 language name and the start of an option class name.
1858 We have a special case for when the user has
1859 specified "--help=c", but otherwise we have to issue
1861 if (strncasecmp (a
, "c", len
) == 0)
1862 *pflags
|= lang_flag
;
1865 "--help argument %q.*s is ambiguous, "
1866 "please be more specific",
1870 else if (lang_flag
!= 0)
1871 *pflags
|= lang_flag
;
1874 "unrecognized argument to --help= option: %q.*s",
1883 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1885 opts
->x_exit_after_options
= true;
1890 if (lang_mask
== CL_DRIVER
)
1893 opts
->x_exit_after_options
= true;
1896 case OPT_fsanitize_
:
1897 opts
->x_flag_sanitize
1898 = parse_sanitizer_options (arg
, loc
, code
,
1899 opts
->x_flag_sanitize
, value
, true);
1901 /* Kernel ASan implies normal ASan but does not yet support
1903 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1905 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1906 0, opts
->x_param_values
,
1907 opts_set
->x_param_values
);
1908 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1909 opts_set
->x_param_values
);
1910 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1911 opts_set
->x_param_values
);
1912 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1913 opts
->x_param_values
,
1914 opts_set
->x_param_values
);
1918 case OPT_fsanitize_recover_
:
1919 opts
->x_flag_sanitize_recover
1920 = parse_sanitizer_options (arg
, loc
, code
,
1921 opts
->x_flag_sanitize_recover
, value
, true);
1924 case OPT_fasan_shadow_offset_
:
1928 case OPT_fsanitize_address_use_after_scope
:
1929 opts
->x_flag_sanitize_address_use_after_scope
= value
;
1932 case OPT_fsanitize_recover
:
1934 opts
->x_flag_sanitize_recover
1935 |= (SANITIZE_UNDEFINED
| SANITIZE_UNDEFINED_NONDEFAULT
)
1936 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1938 opts
->x_flag_sanitize_recover
1939 &= ~(SANITIZE_UNDEFINED
| SANITIZE_UNDEFINED_NONDEFAULT
);
1946 /* Currently handled in a prescan. */
1950 dc
->warning_as_error_requested
= value
;
1954 if (lang_mask
== CL_DRIVER
)
1957 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1958 opts
, opts_set
, loc
, dc
);
1961 case OPT_Wlarger_than_
:
1962 opts
->x_larger_than_size
= value
;
1963 opts
->x_warn_larger_than
= value
!= -1;
1966 case OPT_Wfatal_errors
:
1967 dc
->fatal_errors
= value
;
1970 case OPT_Wframe_larger_than_
:
1971 opts
->x_frame_larger_than_size
= value
;
1972 opts
->x_warn_frame_larger_than
= value
!= -1;
1975 case OPT_Wstack_usage_
:
1976 opts
->x_warn_stack_usage
= value
;
1977 opts
->x_flag_stack_usage_info
= value
!= -1;
1980 case OPT_Wstrict_aliasing
:
1981 set_Wstrict_aliasing (opts
, value
);
1984 case OPT_Wstrict_overflow
:
1985 opts
->x_warn_strict_overflow
= (value
1986 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1990 case OPT_Wsystem_headers
:
1991 dc
->dc_warn_system_headers
= value
;
1995 opts
->x_flag_gen_aux_info
= 1;
1998 case OPT_auxbase_strip
:
2000 char *tmp
= xstrdup (arg
);
2001 strip_off_ending (tmp
, strlen (tmp
));
2003 opts
->x_aux_base_name
= tmp
;
2010 decode_d_option (arg
, opts
, loc
, dc
);
2013 case OPT_fcall_used_
:
2014 case OPT_fcall_saved_
:
2022 case OPT_fdbg_cnt_list
:
2024 opts
->x_exit_after_options
= true;
2027 case OPT_fdebug_prefix_map_
:
2031 case OPT_fdiagnostics_show_location_
:
2032 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
2035 case OPT_fdiagnostics_show_caret
:
2036 dc
->show_caret
= value
;
2039 case OPT_fdiagnostics_color_
:
2040 diagnostic_color_init (dc
, value
);
2043 case OPT_fdiagnostics_parseable_fixits
:
2044 dc
->parseable_fixits_p
= value
;
2047 case OPT_fdiagnostics_show_option
:
2048 dc
->show_option_requested
= value
;
2055 case OPT_ffast_math
:
2056 set_fast_math_flags (opts
, value
);
2059 case OPT_funsafe_math_optimizations
:
2060 set_unsafe_math_optimizations_flags (opts
, value
);
2067 case OPT_finline_limit_
:
2068 set_param_value ("max-inline-insns-single", value
/ 2,
2069 opts
->x_param_values
, opts_set
->x_param_values
);
2070 set_param_value ("max-inline-insns-auto", value
/ 2,
2071 opts
->x_param_values
, opts_set
->x_param_values
);
2074 case OPT_finstrument_functions_exclude_function_list_
:
2075 add_comma_separated_to_vector
2076 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
2079 case OPT_finstrument_functions_exclude_file_list_
:
2080 add_comma_separated_to_vector
2081 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
2084 case OPT_fmessage_length_
:
2085 pp_set_line_maximum_length (dc
->printer
, value
);
2086 diagnostic_set_caret_max_width (dc
, value
);
2090 case OPT_fopt_info_
:
2096 const char *p
= arg
;
2097 opts
->x_flag_disable_hsa
= true;
2100 const char *comma
= strchr (p
, ',');
2102 if ((strncmp (p
, "disable", 7) == 0)
2103 && (p
[7] == ',' || p
[7] == '\0'))
2105 opts
->x_flag_disable_hsa
= true;
2109 if ((strncmp (p
, "hsa", 3) == 0)
2110 && (p
[3] == ',' || p
[3] == '\0'))
2113 opts
->x_flag_disable_hsa
= false;
2115 sorry ("HSA has not been enabled during configuration");
2125 #ifndef ACCEL_COMPILER
2126 case OPT_foffload_abi_
:
2127 error_at (loc
, "-foffload-abi option can be specified only for "
2128 "offload compiler");
2132 case OPT_fpack_struct_
:
2133 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
2135 "structure alignment must be a small power of two, not %d",
2138 opts
->x_initial_max_fld_align
= value
;
2142 case OPT_fplugin_arg_
:
2146 case OPT_fprofile_use_
:
2147 opts
->x_profile_data_prefix
= xstrdup (arg
);
2148 opts
->x_flag_profile_use
= true;
2150 /* No break here - do -fprofile-use processing. */
2152 case OPT_fprofile_use
:
2153 enable_fdo_optimizations (opts
, opts_set
, value
);
2154 if (!opts_set
->x_flag_profile_reorder_functions
)
2155 opts
->x_flag_profile_reorder_functions
= value
;
2156 /* Indirect call profiling should do all useful transformations
2157 speculative devirtualization does. */
2158 if (!opts_set
->x_flag_devirtualize_speculatively
2159 && opts
->x_flag_value_profile_transformations
)
2160 opts
->x_flag_devirtualize_speculatively
= false;
2163 case OPT_fauto_profile_
:
2164 opts
->x_auto_profile_file
= xstrdup (arg
);
2165 opts
->x_flag_auto_profile
= true;
2167 /* No break here - do -fauto-profile processing. */
2169 case OPT_fauto_profile
:
2170 enable_fdo_optimizations (opts
, opts_set
, value
);
2171 if (!opts_set
->x_flag_profile_correction
)
2172 opts
->x_flag_profile_correction
= value
;
2173 maybe_set_param_value (
2174 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
2175 opts
->x_param_values
, opts_set
->x_param_values
);
2178 case OPT_fprofile_generate_
:
2179 opts
->x_profile_data_prefix
= xstrdup (arg
);
2181 /* No break here - do -fprofile-generate processing. */
2183 case OPT_fprofile_generate
:
2184 if (!opts_set
->x_profile_arc_flag
)
2185 opts
->x_profile_arc_flag
= value
;
2186 if (!opts_set
->x_flag_profile_values
)
2187 opts
->x_flag_profile_values
= value
;
2188 if (!opts_set
->x_flag_inline_functions
)
2189 opts
->x_flag_inline_functions
= value
;
2190 if (!opts_set
->x_flag_ipa_bit_cp
)
2191 opts
->x_flag_ipa_bit_cp
= value
;
2192 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2193 quadratic. Disable the pass until better memory representation
2195 if (!opts_set
->x_flag_ipa_reference
)
2196 opts
->x_flag_ipa_reference
= false;
2199 case OPT_ftree_vectorize
:
2200 if (!opts_set
->x_flag_tree_loop_vectorize
)
2201 opts
->x_flag_tree_loop_vectorize
= value
;
2202 if (!opts_set
->x_flag_tree_slp_vectorize
)
2203 opts
->x_flag_tree_slp_vectorize
= value
;
2205 case OPT_fshow_column
:
2206 dc
->show_column
= value
;
2209 case OPT_frandom_seed
:
2210 /* The real switch is -fno-random-seed. */
2216 case OPT_frandom_seed_
:
2220 case OPT_fsched_verbose_
:
2221 #ifdef INSN_SCHEDULING
2222 /* Handled with Var in common.opt. */
2228 case OPT_fsched_stalled_insns_
:
2229 opts
->x_flag_sched_stalled_insns
= value
;
2230 if (opts
->x_flag_sched_stalled_insns
== 0)
2231 opts
->x_flag_sched_stalled_insns
= -1;
2234 case OPT_fsched_stalled_insns_dep_
:
2235 opts
->x_flag_sched_stalled_insns_dep
= value
;
2238 case OPT_fstack_check_
:
2239 if (!strcmp (arg
, "no"))
2240 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2241 else if (!strcmp (arg
, "generic"))
2242 /* This is the old stack checking method. */
2243 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2244 ? FULL_BUILTIN_STACK_CHECK
2245 : GENERIC_STACK_CHECK
;
2246 else if (!strcmp (arg
, "specific"))
2247 /* This is the new stack checking method. */
2248 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2249 ? FULL_BUILTIN_STACK_CHECK
2250 : STACK_CHECK_STATIC_BUILTIN
2251 ? STATIC_BUILTIN_STACK_CHECK
2252 : GENERIC_STACK_CHECK
;
2254 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2257 case OPT_fstack_limit
:
2258 /* The real switch is -fno-stack-limit. */
2264 case OPT_fstack_limit_register_
:
2265 case OPT_fstack_limit_symbol_
:
2269 case OPT_fstack_usage
:
2270 opts
->x_flag_stack_usage
= value
;
2271 opts
->x_flag_stack_usage_info
= value
!= 0;
2275 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2280 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2284 if (arg
&& strlen (arg
) != 0)
2286 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2287 "use %<-gdwarf-%s%> for DWARF version "
2288 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2292 value
= opts
->x_dwarf_version
;
2296 if (value
< 2 || value
> 5)
2297 error_at (loc
, "dwarf version %d is not supported", value
);
2299 opts
->x_dwarf_version
= value
;
2300 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2303 case OPT_gsplit_dwarf
:
2304 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2309 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2314 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2319 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2324 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2330 /* Handled completely via specs. */
2333 case OPT_pedantic_errors
:
2334 dc
->pedantic_errors
= 1;
2335 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2337 handlers
, opts
, opts_set
,
2342 opts
->x_flag_lto
= value
? "" : NULL
;
2346 dc
->dc_inhibit_warnings
= true;
2349 case OPT_fmax_errors_
:
2350 dc
->max_errors
= value
;
2353 case OPT_fuse_ld_bfd
:
2354 case OPT_fuse_ld_gold
:
2355 case OPT_fuse_linker_plugin
:
2356 /* No-op. Used by the driver and passed to us because it starts with f.*/
2361 opts
->x_flag_trapv
= 0;
2366 opts
->x_flag_wrapv
= 0;
2370 opts
->x_flag_ipa_icf_functions
= value
;
2371 opts
->x_flag_ipa_icf_variables
= value
;
2375 /* If the flag was handled in a standard way, assume the lack of
2376 processing here is intentional. */
2377 gcc_assert (option_flag_var (scode
, opts
));
2381 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2386 /* Handle --param NAME=VALUE. */
2388 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2389 location_t loc
, const char *carg
)
2394 arg
= xstrdup (carg
);
2395 equal
= strchr (arg
, '=');
2397 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2403 enum compiler_param index
;
2404 if (!find_param (arg
, &index
))
2406 const char *suggestion
= find_param_fuzzy (arg
);
2408 error_at (loc
, "invalid --param name %qs; did you mean %qs?",
2411 error_at (loc
, "invalid --param name %qs", arg
);
2415 if (!param_string_value_p (index
, equal
+ 1, &value
))
2416 value
= integral_argument (equal
+ 1);
2419 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2421 set_param_value (arg
, value
,
2422 opts
->x_param_values
, opts_set
->x_param_values
);
2429 /* Used to set the level of strict aliasing warnings in OPTS,
2430 when no level is specified (i.e., when -Wstrict-aliasing, and not
2431 -Wstrict-aliasing=level was given).
2432 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2433 and 0 otherwise. After calling this function, wstrict_aliasing will be
2434 set to the default value of -Wstrict_aliasing=level, currently 3. */
2436 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2438 gcc_assert (onoff
== 0 || onoff
== 1);
2440 opts
->x_warn_strict_aliasing
= 3;
2442 opts
->x_warn_strict_aliasing
= 0;
2445 /* The following routines are useful in setting all the flags that
2446 -ffast-math and -fno-fast-math imply. */
2448 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2450 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2452 opts
->x_flag_unsafe_math_optimizations
= set
;
2453 set_unsafe_math_optimizations_flags (opts
, set
);
2455 if (!opts
->frontend_set_flag_finite_math_only
)
2456 opts
->x_flag_finite_math_only
= set
;
2457 if (!opts
->frontend_set_flag_errno_math
)
2458 opts
->x_flag_errno_math
= !set
;
2461 if (opts
->frontend_set_flag_excess_precision_cmdline
2462 == EXCESS_PRECISION_DEFAULT
)
2463 opts
->x_flag_excess_precision_cmdline
2464 = set
? EXCESS_PRECISION_FAST
: EXCESS_PRECISION_DEFAULT
;
2465 if (!opts
->frontend_set_flag_signaling_nans
)
2466 opts
->x_flag_signaling_nans
= 0;
2467 if (!opts
->frontend_set_flag_rounding_math
)
2468 opts
->x_flag_rounding_math
= 0;
2469 if (!opts
->frontend_set_flag_cx_limited_range
)
2470 opts
->x_flag_cx_limited_range
= 1;
2474 /* When -funsafe-math-optimizations is set the following
2475 flags are set as well. */
2477 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2479 if (!opts
->frontend_set_flag_trapping_math
)
2480 opts
->x_flag_trapping_math
= !set
;
2481 if (!opts
->frontend_set_flag_signed_zeros
)
2482 opts
->x_flag_signed_zeros
= !set
;
2483 if (!opts
->frontend_set_flag_associative_math
)
2484 opts
->x_flag_associative_math
= set
;
2485 if (!opts
->frontend_set_flag_reciprocal_math
)
2486 opts
->x_flag_reciprocal_math
= set
;
2489 /* Return true iff flags in OPTS are set as if -ffast-math. */
2491 fast_math_flags_set_p (const struct gcc_options
*opts
)
2493 return (!opts
->x_flag_trapping_math
2494 && opts
->x_flag_unsafe_math_optimizations
2495 && opts
->x_flag_finite_math_only
2496 && !opts
->x_flag_signed_zeros
2497 && !opts
->x_flag_errno_math
2498 && opts
->x_flag_excess_precision_cmdline
2499 == EXCESS_PRECISION_FAST
);
2502 /* Return true iff flags are set as if -ffast-math but using the flags stored
2503 in the struct cl_optimization structure. */
2505 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2507 return (!opt
->x_flag_trapping_math
2508 && opt
->x_flag_unsafe_math_optimizations
2509 && opt
->x_flag_finite_math_only
2510 && !opt
->x_flag_signed_zeros
2511 && !opt
->x_flag_errno_math
);
2514 /* Handle a debug output -g switch for options OPTS
2515 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2516 explicitly), location LOC. EXTENDED is true or false to support
2517 extended output (2 is special and means "-ggdb" was given). */
2519 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2520 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2523 opts
->x_use_gnu_debug_info_extensions
= extended
;
2525 if (type
== NO_DEBUG
)
2527 if (opts
->x_write_symbols
== NO_DEBUG
)
2529 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2533 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2534 opts
->x_write_symbols
= DWARF2_DEBUG
;
2535 #elif defined DBX_DEBUGGING_INFO
2536 opts
->x_write_symbols
= DBX_DEBUG
;
2540 if (opts
->x_write_symbols
== NO_DEBUG
)
2541 warning_at (loc
, 0, "target system does not support debug output");
2546 /* Does it conflict with an already selected type? */
2547 if (opts_set
->x_write_symbols
!= NO_DEBUG
2548 && opts
->x_write_symbols
!= NO_DEBUG
2549 && type
!= opts
->x_write_symbols
)
2550 error_at (loc
, "debug format %qs conflicts with prior selection",
2551 debug_type_names
[type
]);
2552 opts
->x_write_symbols
= type
;
2553 opts_set
->x_write_symbols
= type
;
2556 /* A debug flag without a level defaults to level 2.
2557 If off or at level 1, set it to level 2, but if already
2558 at level 3, don't lower it. */
2561 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2562 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2566 int argval
= integral_argument (arg
);
2568 error_at (loc
, "unrecognized debug output level %qs", arg
);
2569 else if (argval
> 3)
2570 error_at (loc
, "debug output level %qs is too high", arg
);
2572 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2576 /* Arrange to dump core on error for diagnostic context DC. (The
2577 regular error message is still printed first, except in the case of
2581 setup_core_dumping (diagnostic_context
*dc
)
2584 signal (SIGABRT
, SIG_DFL
);
2586 #if defined(HAVE_SETRLIMIT)
2589 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2590 fatal_error (input_location
, "getting core file size maximum limit: %m");
2591 rlim
.rlim_cur
= rlim
.rlim_max
;
2592 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2593 fatal_error (input_location
,
2594 "setting core file size limit to maximum: %m");
2597 diagnostic_abort_on_error (dc
);
2600 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2601 diagnostic context DC. */
2604 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2605 location_t loc
, diagnostic_context
*dc
)
2613 opts
->x_flag_debug_asm
= 1;
2616 opts
->x_flag_print_asm_name
= 1;
2619 opts
->x_flag_dump_rtl_in_asm
= 1;
2620 opts
->x_flag_print_asm_name
= 1;
2623 opts
->x_rtl_dump_and_exit
= 1;
2625 case 'D': /* These are handled by the preprocessor. */
2632 setup_core_dumping (dc
);
2635 opts
->x_flag_dump_all_passed
= true;
2639 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2644 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2645 mask LANG_MASK, option handlers HANDLERS) as an error for option
2646 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2647 NULL), location LOC. This is used by -Werror=. */
2650 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2651 const struct cl_option_handlers
*handlers
,
2652 struct gcc_options
*opts
,
2653 struct gcc_options
*opts_set
,
2654 location_t loc
, diagnostic_context
*dc
)
2659 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2660 new_option
[0] = 'W';
2661 strcpy (new_option
+ 1, arg
);
2662 option_index
= find_opt (new_option
, lang_mask
);
2663 if (option_index
== OPT_SPECIAL_unknown
)
2664 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2665 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2666 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2670 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2671 const char *arg
= NULL
;
2673 if (cl_options
[option_index
].flags
& CL_JOINED
)
2674 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2675 control_warning_option (option_index
, (int) kind
, arg
, value
,
2677 handlers
, opts
, opts_set
, dc
);
2682 /* Return malloced memory for the name of the option OPTION_INDEX
2683 which enabled a diagnostic (context CONTEXT), originally of type
2684 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2688 option_name (diagnostic_context
*context
, int option_index
,
2689 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2693 /* A warning classified as an error. */
2694 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2695 && diag_kind
== DK_ERROR
)
2696 return concat (cl_options
[OPT_Werror_
].opt_text
,
2697 /* Skip over "-W". */
2698 cl_options
[option_index
].opt_text
+ 2,
2700 /* A warning with option. */
2702 return xstrdup (cl_options
[option_index
].opt_text
);
2704 /* A warning without option classified as an error. */
2705 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2706 || diag_kind
== DK_WARNING
)
2707 && context
->warning_as_error_requested
)
2708 return xstrdup (cl_options
[OPT_Werror
].opt_text
);