1 /* Command line option handling.
2 Copyright (C) 2002-2016 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"
34 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
36 /* Indexed by enum debug_info_type. */
37 const char *const debug_type_names
[] =
39 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
42 /* Parse the -femit-struct-debug-detailed option value
43 and set the flag variables. */
45 #define MATCH( prefix, string ) \
46 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
47 ? ((string += sizeof prefix - 1), 1) : 0)
50 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
53 /* various labels for comparison */
54 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
55 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
56 static const char none_lbl
[] = "none", any_lbl
[] = "any";
57 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
59 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
60 /* Default is to apply to as much as possible. */
61 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
65 if (MATCH (dfn_lbl
, spec
))
66 usage
= DINFO_USAGE_DFN
;
67 else if (MATCH (dir_lbl
, spec
))
68 usage
= DINFO_USAGE_DIR_USE
;
69 else if (MATCH (ind_lbl
, spec
))
70 usage
= DINFO_USAGE_IND_USE
;
72 /* Generics or not? */
73 if (MATCH (ord_lbl
, spec
))
75 else if (MATCH (gen_lbl
, spec
))
78 /* What allowable environment? */
79 if (MATCH (none_lbl
, spec
))
80 files
= DINFO_STRUCT_FILE_NONE
;
81 else if (MATCH (any_lbl
, spec
))
82 files
= DINFO_STRUCT_FILE_ANY
;
83 else if (MATCH (sys_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_SYS
;
85 else if (MATCH (base_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_BASE
;
89 "argument %qs to %<-femit-struct-debug-detailed%> "
93 /* Effect the specification. */
94 if (usage
== DINFO_USAGE_NUM_ENUMS
)
98 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
99 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
104 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
105 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
112 opts
->x_debug_struct_ordinary
[usage
] = files
;
114 opts
->x_debug_struct_generic
[usage
] = files
;
118 set_struct_debug_option (opts
, loc
, spec
+1);
121 /* No more -femit-struct-debug-detailed specifications.
125 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
127 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
128 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
129 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
130 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
132 "%<-femit-struct-debug-detailed=dir:...%> must allow "
133 "at least as much as "
134 "%<-femit-struct-debug-detailed=ind:...%>");
138 /* Strip off a legitimate source ending from the input string NAME of
139 length LEN. Rather than having to know the names used by all of
140 our front ends, we strip off an ending of a period followed by
141 up to five characters. (Java uses ".class".) */
144 strip_off_ending (char *name
, int len
)
147 for (i
= 2; i
< 6 && len
> i
; i
++)
149 if (name
[len
- i
] == '.')
151 name
[len
- i
] = '\0';
157 /* Find the base name of a path, stripping off both directories and
158 a single final extension. */
160 base_of_path (const char *path
, const char **base_out
)
162 const char *base
= path
;
164 const char *p
= path
;
168 if (IS_DIR_SEPARATOR (c
))
183 /* What to print when a switch has no documentation. */
184 static const char undocumented_msg
[] = N_("This option lacks documentation.");
185 static const char use_diagnosed_msg
[] = N_("Uses of this option are diagnosed.");
187 typedef char *char_p
; /* For DEF_VEC_P. */
189 static void handle_param (struct gcc_options
*opts
,
190 struct gcc_options
*opts_set
, location_t loc
,
192 static void set_debug_level (enum debug_info_type type
, int extended
,
193 const char *arg
, struct gcc_options
*opts
,
194 struct gcc_options
*opts_set
,
196 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
197 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
198 location_t loc
, diagnostic_context
*dc
);
199 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
201 static void enable_warning_as_error (const char *arg
, int value
,
202 unsigned int lang_mask
,
203 const struct cl_option_handlers
*handlers
,
204 struct gcc_options
*opts
,
205 struct gcc_options
*opts_set
,
207 diagnostic_context
*dc
);
209 /* Handle a back-end option; arguments and return value as for
213 target_handle_option (struct gcc_options
*opts
,
214 struct gcc_options
*opts_set
,
215 const struct cl_decoded_option
*decoded
,
216 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
218 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
219 diagnostic_context
*dc
)
221 gcc_assert (dc
== global_dc
);
222 gcc_assert (kind
== DK_UNSPECIFIED
);
223 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
226 /* Add comma-separated strings to a char_p vector. */
229 add_comma_separated_to_vector (void **pvec
, const char *arg
)
235 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
237 vec_check_alloc (v
, 1);
239 /* We never free this string. */
252 v
->safe_push (token_start
);
255 if (*r
== '\\' && r
[1] == ',')
263 if (*token_start
!= '\0')
264 v
->safe_push (token_start
);
269 /* Initialize opts_obstack. */
272 init_opts_obstack (void)
274 gcc_obstack_init (&opts_obstack
);
277 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
280 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
282 size_t num_params
= get_num_compiler_params ();
284 /* Ensure that opts_obstack has already been initialized by the time
285 that we initialize any gcc_options instances (PR jit/68446). */
286 gcc_assert (opts_obstack
.chunk_size
> 0);
288 *opts
= global_options_init
;
291 memset (opts_set
, 0, sizeof (*opts_set
));
293 opts
->x_param_values
= XNEWVEC (int, num_params
);
296 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
298 init_param_values (opts
->x_param_values
);
300 /* Initialize whether `char' is signed. */
301 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
302 /* Set this to a special "uninitialized" value. The actual default
303 is set after target options have been processed. */
304 opts
->x_flag_short_enums
= 2;
306 /* Initialize target_flags before default_options_optimization
307 so the latter can modify it. */
308 opts
->x_target_flags
= targetm_common
.default_target_flags
;
310 /* Some targets have ABI-specified unwind tables. */
311 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
313 /* Some targets have other target-specific initialization. */
314 targetm_common
.option_init_struct (opts
);
317 /* Release any allocations owned by OPTS. */
320 finalize_options_struct (struct gcc_options
*opts
)
322 XDELETEVEC (opts
->x_param_values
);
325 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
326 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
327 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
328 mask LANG_MASK and option handlers HANDLERS. */
331 maybe_default_option (struct gcc_options
*opts
,
332 struct gcc_options
*opts_set
,
333 const struct default_options
*default_opt
,
334 int level
, bool size
, bool fast
, bool debug
,
335 unsigned int lang_mask
,
336 const struct cl_option_handlers
*handlers
,
338 diagnostic_context
*dc
)
340 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
344 gcc_assert (level
== 2);
346 gcc_assert (level
== 3);
348 gcc_assert (level
== 1);
350 switch (default_opt
->levels
)
356 case OPT_LEVELS_0_ONLY
:
357 enabled
= (level
== 0);
360 case OPT_LEVELS_1_PLUS
:
361 enabled
= (level
>= 1);
364 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
365 enabled
= (level
>= 1 && !size
&& !debug
);
368 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
369 enabled
= (level
>= 1 && !debug
);
372 case OPT_LEVELS_2_PLUS
:
373 enabled
= (level
>= 2);
376 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
377 enabled
= (level
>= 2 && !size
&& !debug
);
380 case OPT_LEVELS_3_PLUS
:
381 enabled
= (level
>= 3);
384 case OPT_LEVELS_3_PLUS_AND_SIZE
:
385 enabled
= (level
>= 3 || size
);
388 case OPT_LEVELS_SIZE
:
392 case OPT_LEVELS_FAST
:
396 case OPT_LEVELS_NONE
:
402 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
403 default_opt
->arg
, default_opt
->value
,
404 lang_mask
, DK_UNSPECIFIED
, loc
,
406 else if (default_opt
->arg
== NULL
407 && !option
->cl_reject_negative
)
408 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
409 default_opt
->arg
, !default_opt
->value
,
410 lang_mask
, DK_UNSPECIFIED
, loc
,
414 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
415 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
416 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
417 language mask LANG_MASK and option handlers HANDLERS. */
420 maybe_default_options (struct gcc_options
*opts
,
421 struct gcc_options
*opts_set
,
422 const struct default_options
*default_opts
,
423 int level
, bool size
, bool fast
, bool debug
,
424 unsigned int lang_mask
,
425 const struct cl_option_handlers
*handlers
,
427 diagnostic_context
*dc
)
431 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
432 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
433 level
, size
, fast
, debug
,
434 lang_mask
, handlers
, loc
, dc
);
437 /* Table of options enabled by default at different levels. */
439 static const struct default_options default_options_table
[] =
441 /* -O1 optimizations. */
442 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS
, OPT_ftree_coalesce_vars
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
465 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
466 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
467 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
468 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
469 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
470 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
471 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
472 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
473 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
474 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
475 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
476 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
477 { OPT_LEVELS_1_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
479 /* -O2 optimizations. */
480 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
492 #ifdef INSN_SCHEDULING
493 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
494 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, 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 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
748 sorry ("transactional memory is not supported with non-call exceptions");
750 /* Unless the user has asked for section anchors, we disable toplevel
751 reordering at -O0 to disable transformations that might be surprising
752 to end users and to get -fno-toplevel-reorder tested. */
753 if (!opts
->x_optimize
754 && opts
->x_flag_toplevel_reorder
== 2
755 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
757 opts
->x_flag_toplevel_reorder
= 0;
758 opts
->x_flag_section_anchors
= 0;
760 if (!opts
->x_flag_toplevel_reorder
)
762 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
763 error_at (loc
, "section anchors must be disabled when toplevel reorder"
765 opts
->x_flag_section_anchors
= 0;
768 if (!opts
->x_flag_opts_finished
)
770 /* We initialize opts->x_flag_pie to -1 so that targets can set a
772 if (opts
->x_flag_pie
== -1)
774 /* We initialize opts->x_flag_pic to -1 so that we can tell if
775 -fpic, -fPIC, -fno-pic or -fno-PIC is used. */
776 if (opts
->x_flag_pic
== -1)
777 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
779 opts
->x_flag_pie
= 0;
781 /* If -fPIE or -fpie is used, turn on PIC. */
782 if (opts
->x_flag_pie
)
783 opts
->x_flag_pic
= opts
->x_flag_pie
;
784 else if (opts
->x_flag_pic
== -1)
785 opts
->x_flag_pic
= 0;
786 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
787 opts
->x_flag_shlib
= 1;
788 opts
->x_flag_opts_finished
= true;
791 /* We initialize opts->x_flag_stack_protect to -1 so that targets
792 can set a default value. */
793 if (opts
->x_flag_stack_protect
== -1)
794 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
796 if (opts
->x_optimize
== 0)
798 /* Inlining does not work if not optimizing,
799 so force it not to be done. */
800 opts
->x_warn_inline
= 0;
801 opts
->x_flag_no_inline
= 1;
804 /* The optimization to partition hot and cold basic blocks into separate
805 sections of the .o and executable files does not work (currently)
806 with exception handling. This is because there is no support for
807 generating unwind info. If opts->x_flag_exceptions is turned on
808 we need to turn off the partitioning optimization. */
810 ui_except
= targetm_common
.except_unwind_info (opts
);
812 if (opts
->x_flag_exceptions
813 && opts
->x_flag_reorder_blocks_and_partition
814 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
816 if (opts_set
->x_flag_reorder_blocks_and_partition
)
818 "-freorder-blocks-and-partition does not work "
819 "with exceptions on this architecture");
820 opts
->x_flag_reorder_blocks_and_partition
= 0;
821 opts
->x_flag_reorder_blocks
= 1;
824 /* If user requested unwind info, then turn off the partitioning
827 if (opts
->x_flag_unwind_tables
828 && !targetm_common
.unwind_tables_default
829 && opts
->x_flag_reorder_blocks_and_partition
830 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
832 if (opts_set
->x_flag_reorder_blocks_and_partition
)
834 "-freorder-blocks-and-partition does not support "
835 "unwind info on this architecture");
836 opts
->x_flag_reorder_blocks_and_partition
= 0;
837 opts
->x_flag_reorder_blocks
= 1;
840 /* If the target requested unwind info, then turn off the partitioning
841 optimization with a different message. Likewise, if the target does not
842 support named sections. */
844 if (opts
->x_flag_reorder_blocks_and_partition
845 && (!targetm_common
.have_named_sections
846 || (opts
->x_flag_unwind_tables
847 && targetm_common
.unwind_tables_default
848 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
850 if (opts_set
->x_flag_reorder_blocks_and_partition
)
852 "-freorder-blocks-and-partition does not work "
853 "on this architecture");
854 opts
->x_flag_reorder_blocks_and_partition
= 0;
855 opts
->x_flag_reorder_blocks
= 1;
858 /* Disable -freorder-blocks-and-partition when -fprofile-use is not in
859 effect. Function splitting was not actually being performed in that case,
860 as probably_never_executed_bb_p does not distinguish any basic blocks as
861 being cold vs hot when there is no profile data. Leaving it enabled,
862 however, causes the assembly code generator to create (empty) cold
863 sections and labels, leading to unnecessary size overhead. */
864 if (opts
->x_flag_reorder_blocks_and_partition
865 && !opts_set
->x_flag_profile_use
)
866 opts
->x_flag_reorder_blocks_and_partition
= 0;
868 if (opts
->x_flag_reorder_blocks_and_partition
869 && !opts_set
->x_flag_reorder_functions
)
870 opts
->x_flag_reorder_functions
= 1;
872 /* Pipelining of outer loops is only possible when general pipelining
873 capabilities are requested. */
874 if (!opts
->x_flag_sel_sched_pipelining
)
875 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
877 if (opts
->x_flag_conserve_stack
)
879 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
880 opts
->x_param_values
, opts_set
->x_param_values
);
881 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
882 opts
->x_param_values
, opts_set
->x_param_values
);
885 if (opts
->x_flag_lto
)
888 opts
->x_flag_generate_lto
= 1;
890 /* When generating IL, do not operate in whole-program mode.
891 Otherwise, symbols will be privatized too early, causing link
893 opts
->x_flag_whole_program
= 0;
895 error_at (loc
, "LTO support has not been enabled in this configuration");
897 if (!opts
->x_flag_fat_lto_objects
899 || (opts_set
->x_flag_use_linker_plugin
900 && !opts
->x_flag_use_linker_plugin
)))
902 if (opts_set
->x_flag_fat_lto_objects
)
903 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
904 opts
->x_flag_fat_lto_objects
= 1;
908 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
909 default value if they choose based on other options. */
910 if (opts
->x_flag_split_stack
== -1)
911 opts
->x_flag_split_stack
= 0;
912 else if (opts
->x_flag_split_stack
)
914 if (!targetm_common
.supports_split_stack (true, opts
))
916 error_at (loc
, "%<-fsplit-stack%> is not supported by "
917 "this compiler configuration");
918 opts
->x_flag_split_stack
= 0;
922 /* Tune vectorization related parametees according to cost model. */
923 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
925 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
926 6, opts
->x_param_values
, opts_set
->x_param_values
);
927 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
928 0, opts
->x_param_values
, opts_set
->x_param_values
);
929 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
930 0, opts
->x_param_values
, opts_set
->x_param_values
);
933 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
935 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
936 || !opts
->x_flag_tree_loop_if_convert
)
937 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
938 opts
->x_param_values
, opts_set
->x_param_values
);
940 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
941 if (opts
->x_dwarf_split_debug_info
)
942 opts
->x_debug_generate_pub_sections
= 2;
944 /* Userspace and kernel ASan conflict with each other. */
945 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
946 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
948 "-fsanitize=address is incompatible with "
949 "-fsanitize=kernel-address");
952 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
953 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
955 "-fsanitize=address and -fsanitize=kernel-address "
956 "are incompatible with -fsanitize=thread");
958 if ((opts
->x_flag_sanitize
& SANITIZE_LEAK
)
959 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
961 "-fsanitize=leak is incompatible with -fsanitize=thread");
963 /* Check error recovery for -fsanitize-recover option. */
964 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
965 if ((opts
->x_flag_sanitize_recover
& sanitizer_opts
[i
].flag
)
966 && !sanitizer_opts
[i
].can_recover
)
967 error_at (loc
, "-fsanitize-recover=%s is not supported",
968 sanitizer_opts
[i
].name
);
970 /* When instrumenting the pointers, we don't want to remove
971 the null pointer checks. */
972 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
973 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
974 opts
->x_flag_delete_null_pointer_checks
= 0;
976 /* Aggressive compiler optimizations may cause false negatives. */
977 if (opts
->x_flag_sanitize
& ~(SANITIZE_LEAK
| SANITIZE_UNREACHABLE
))
979 opts
->x_flag_aggressive_loop_optimizations
= 0;
980 opts
->x_flag_strict_overflow
= 0;
983 /* Enable -fsanitize-address-use-after-scope if address sanitizer is
985 if (opts
->x_flag_sanitize
986 && !opts_set
->x_flag_sanitize_address_use_after_scope
)
987 opts
->x_flag_sanitize_address_use_after_scope
= true;
989 /* Force -fstack-reuse=none in case -fsanitize-address-use-after-scope
991 if (opts
->x_flag_sanitize_address_use_after_scope
)
993 if (opts
->x_flag_stack_reuse
!= SR_NONE
994 && opts_set
->x_flag_stack_reuse
!= SR_NONE
)
996 "-fsanitize-address-use-after-scope requires "
997 "-fstack-reuse=none option");
999 opts
->x_flag_stack_reuse
= SR_NONE
;
1003 #define LEFT_COLUMN 27
1005 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1006 followed by word-wrapped HELP in a second column. */
1008 wrap_help (const char *help
,
1010 unsigned int item_width
,
1011 unsigned int columns
)
1013 unsigned int col_width
= LEFT_COLUMN
;
1014 unsigned int remaining
, room
, len
;
1016 remaining
= strlen (help
);
1020 room
= columns
- 3 - MAX (col_width
, item_width
);
1029 for (i
= 0; help
[i
]; i
++)
1031 if (i
>= room
&& len
!= remaining
)
1035 else if ((help
[i
] == '-' || help
[i
] == '/')
1036 && help
[i
+ 1] != ' '
1037 && i
> 0 && ISALPHA (help
[i
- 1]))
1042 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1044 while (help
[len
] == ' ')
1052 /* Print help for a specific front-end, etc. */
1054 print_filtered_help (unsigned int include_flags
,
1055 unsigned int exclude_flags
,
1056 unsigned int any_flags
,
1057 unsigned int columns
,
1058 struct gcc_options
*opts
,
1059 unsigned int lang_mask
)
1064 bool displayed
= false;
1067 if (include_flags
== CL_PARAMS
)
1069 for (i
= 0; i
< LAST_PARAM
; i
++)
1071 const char *param
= compiler_params
[i
].option
;
1073 help
= compiler_params
[i
].help
;
1074 if (help
== NULL
|| *help
== '\0')
1076 if (exclude_flags
& CL_UNDOCUMENTED
)
1078 help
= undocumented_msg
;
1081 /* Get the translation. */
1084 if (!opts
->x_quiet_flag
)
1086 snprintf (new_help
, sizeof (new_help
),
1087 _("default %d minimum %d maximum %d"),
1088 compiler_params
[i
].default_value
,
1089 compiler_params
[i
].min_value
,
1090 compiler_params
[i
].max_value
);
1093 wrap_help (help
, param
, strlen (param
), columns
);
1099 if (!opts
->x_help_printed
)
1100 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1102 if (!opts
->x_help_enum_printed
)
1103 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1105 for (i
= 0; i
< cl_options_count
; i
++)
1107 const struct cl_option
*option
= cl_options
+ i
;
1112 if (include_flags
== 0
1113 || ((option
->flags
& include_flags
) != include_flags
))
1115 if ((option
->flags
& any_flags
) == 0)
1119 /* Skip unwanted switches. */
1120 if ((option
->flags
& exclude_flags
) != 0)
1123 /* The driver currently prints its own help text. */
1124 if ((option
->flags
& CL_DRIVER
) != 0
1125 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1126 | CL_COMMON
| CL_TARGET
)) == 0)
1130 /* Skip switches that have already been printed. */
1131 if (opts
->x_help_printed
[i
])
1134 opts
->x_help_printed
[i
] = true;
1136 help
= option
->help
;
1139 if (exclude_flags
& CL_UNDOCUMENTED
)
1142 help
= undocumented_msg
;
1145 if (option
->alias_target
< N_OPTS
1146 && cl_options
[option
->alias_target
].help
)
1148 if (help
== undocumented_msg
)
1150 /* For undocumented options that are aliases for other options
1151 that are documented, point the reader to the other option in
1152 preference of the former. */
1153 snprintf (new_help
, sizeof new_help
,
1154 _("Same as %s. Use the latter option instead."),
1155 cl_options
[option
->alias_target
].opt_text
);
1159 /* For documented options with aliases, mention the aliased
1160 option's name for reference. */
1161 snprintf (new_help
, sizeof new_help
,
1162 _("%s Same as %s."),
1163 help
, cl_options
[option
->alias_target
].opt_text
);
1169 if (option
->warn_message
)
1171 /* Mention that the use of the option will trigger a warning. */
1172 if (help
== new_help
)
1173 snprintf (new_help
+ strlen (new_help
),
1174 sizeof new_help
- strlen (new_help
),
1175 " %s", _(use_diagnosed_msg
));
1177 snprintf (new_help
, sizeof new_help
,
1178 "%s %s", help
, _(use_diagnosed_msg
));
1183 /* Get the translation. */
1186 /* Find the gap between the name of the
1187 option and its descriptive text. */
1188 tab
= strchr (help
, '\t');
1197 opt
= option
->opt_text
;
1201 /* With the -Q option enabled we change the descriptive text associated
1202 with an option to be an indication of its current setting. */
1203 if (!opts
->x_quiet_flag
)
1205 void *flag_var
= option_flag_var (i
, opts
);
1207 if (len
< (LEFT_COLUMN
+ 2))
1208 strcpy (new_help
, "\t\t");
1210 strcpy (new_help
, "\t");
1212 if (flag_var
!= NULL
1213 && option
->var_type
!= CLVC_DEFER
)
1215 if (option
->flags
& CL_JOINED
)
1217 if (option
->var_type
== CLVC_STRING
)
1219 if (* (const char **) flag_var
!= NULL
)
1220 snprintf (new_help
+ strlen (new_help
),
1221 sizeof (new_help
) - strlen (new_help
),
1222 "%s", * (const char **) flag_var
);
1224 else if (option
->var_type
== CLVC_ENUM
)
1226 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1228 const char *arg
= NULL
;
1230 value
= e
->get (flag_var
);
1231 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1233 arg
= _("[default]");
1234 snprintf (new_help
+ strlen (new_help
),
1235 sizeof (new_help
) - strlen (new_help
),
1239 sprintf (new_help
+ strlen (new_help
),
1240 "%#x", * (int *) flag_var
);
1243 strcat (new_help
, option_enabled (i
, opts
)
1244 ? _("[enabled]") : _("[disabled]"));
1250 wrap_help (help
, opt
, len
, columns
);
1253 if (option
->var_type
== CLVC_ENUM
1254 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1255 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1260 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1263 printf (_(" No options with the desired characteristics were found\n"));
1268 /* PR 31349: Tell the user how to see all of the
1269 options supported by a specific front end. */
1270 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1271 if ((1U << i
) & langs
)
1272 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1273 lang_names
[i
], lang_names
[i
]);
1277 else if (! displayed
)
1278 printf (_(" All options with the desired characteristics have already been displayed\n"));
1282 /* Print details of enumerated option arguments, if those
1283 enumerations have help text headings provided. If no help text
1284 is provided, presume that the possible values are listed in the
1285 help text for the relevant options. */
1286 for (i
= 0; i
< cl_enums_count
; i
++)
1288 unsigned int j
, pos
;
1290 if (opts
->x_help_enum_printed
[i
] != 1)
1292 if (cl_enums
[i
].help
== NULL
)
1294 printf (" %s\n ", _(cl_enums
[i
].help
));
1296 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1298 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1300 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1302 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1312 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1317 opts
->x_help_enum_printed
[i
] = 2;
1321 /* Display help for a specified type of option.
1322 The options must have ALL of the INCLUDE_FLAGS set
1323 ANY of the flags in the ANY_FLAGS set
1324 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1325 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1327 print_specific_help (unsigned int include_flags
,
1328 unsigned int exclude_flags
,
1329 unsigned int any_flags
,
1330 struct gcc_options
*opts
,
1331 unsigned int lang_mask
)
1333 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1334 const char * description
= NULL
;
1335 const char * descrip_extra
= "";
1339 /* Sanity check: Make sure that we do not have more
1340 languages than we have bits available to enumerate them. */
1341 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1343 /* If we have not done so already, obtain
1344 the desired maximum width of the output. */
1345 if (opts
->x_help_columns
== 0)
1347 opts
->x_help_columns
= get_terminal_width ();
1348 if (opts
->x_help_columns
== INT_MAX
)
1349 /* Use a reasonable default. */
1350 opts
->x_help_columns
= 80;
1353 /* Decide upon the title for the options that we are going to display. */
1354 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1356 switch (flag
& include_flags
)
1363 description
= _("The following options are target specific");
1366 description
= _("The following options control compiler warning messages");
1368 case CL_OPTIMIZATION
:
1369 description
= _("The following options control optimizations");
1372 description
= _("The following options are language-independent");
1375 description
= _("The --param option recognizes the following as parameters");
1378 if (i
>= cl_lang_count
)
1380 if (exclude_flags
& all_langs_mask
)
1381 description
= _("The following options are specific to just the language ");
1383 description
= _("The following options are supported by the language ");
1384 descrip_extra
= lang_names
[i
];
1389 if (description
== NULL
)
1393 if (include_flags
& CL_UNDOCUMENTED
)
1394 description
= _("The following options are not documented");
1395 else if (include_flags
& CL_SEPARATE
)
1396 description
= _("The following options take separate arguments");
1397 else if (include_flags
& CL_JOINED
)
1398 description
= _("The following options take joined arguments");
1401 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1408 if (any_flags
& all_langs_mask
)
1409 description
= _("The following options are language-related");
1411 description
= _("The following options are language-independent");
1415 printf ("%s%s:\n", description
, descrip_extra
);
1416 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1417 opts
->x_help_columns
, opts
, lang_mask
);
1420 /* Enable FDO-related flags. */
1423 enable_fdo_optimizations (struct gcc_options
*opts
,
1424 struct gcc_options
*opts_set
,
1427 if (!opts_set
->x_flag_branch_probabilities
)
1428 opts
->x_flag_branch_probabilities
= value
;
1429 if (!opts_set
->x_flag_profile_values
)
1430 opts
->x_flag_profile_values
= value
;
1431 if (!opts_set
->x_flag_unroll_loops
)
1432 opts
->x_flag_unroll_loops
= value
;
1433 if (!opts_set
->x_flag_peel_loops
)
1434 opts
->x_flag_peel_loops
= value
;
1435 if (!opts_set
->x_flag_tracer
)
1436 opts
->x_flag_tracer
= value
;
1437 if (!opts_set
->x_flag_value_profile_transformations
)
1438 opts
->x_flag_value_profile_transformations
= value
;
1439 if (!opts_set
->x_flag_inline_functions
)
1440 opts
->x_flag_inline_functions
= value
;
1441 if (!opts_set
->x_flag_ipa_cp
)
1442 opts
->x_flag_ipa_cp
= value
;
1443 if (!opts_set
->x_flag_ipa_cp_clone
1444 && value
&& opts
->x_flag_ipa_cp
)
1445 opts
->x_flag_ipa_cp_clone
= value
;
1446 if (!opts_set
->x_flag_ipa_bit_cp
1447 && value
&& opts
->x_flag_ipa_cp
)
1448 opts
->x_flag_ipa_bit_cp
= value
;
1449 if (!opts_set
->x_flag_predictive_commoning
)
1450 opts
->x_flag_predictive_commoning
= value
;
1451 if (!opts_set
->x_flag_split_loops
)
1452 opts
->x_flag_split_loops
= value
;
1453 if (!opts_set
->x_flag_unswitch_loops
)
1454 opts
->x_flag_unswitch_loops
= value
;
1455 if (!opts_set
->x_flag_gcse_after_reload
)
1456 opts
->x_flag_gcse_after_reload
= value
;
1457 if (!opts_set
->x_flag_tree_loop_vectorize
1458 && !opts_set
->x_flag_tree_vectorize
)
1459 opts
->x_flag_tree_loop_vectorize
= value
;
1460 if (!opts_set
->x_flag_tree_slp_vectorize
1461 && !opts_set
->x_flag_tree_vectorize
)
1462 opts
->x_flag_tree_slp_vectorize
= value
;
1463 if (!opts_set
->x_flag_vect_cost_model
)
1464 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1465 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1466 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1469 /* -f{,no-}sanitize{,-recover}= suboptions. */
1470 const struct sanitizer_opts_s sanitizer_opts
[] =
1472 #define SANITIZER_OPT(name, flags, recover) \
1473 { #name, flags, sizeof #name - 1, recover }
1474 SANITIZER_OPT (address
, (SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
), true),
1475 SANITIZER_OPT (kernel
-address
, (SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
),
1477 SANITIZER_OPT (thread
, SANITIZE_THREAD
, false),
1478 SANITIZER_OPT (leak
, SANITIZE_LEAK
, false),
1479 SANITIZER_OPT (shift
, SANITIZE_SHIFT
, true),
1480 SANITIZER_OPT (shift
-base
, SANITIZE_SHIFT_BASE
, true),
1481 SANITIZER_OPT (shift
-exponent
, SANITIZE_SHIFT_EXPONENT
, true),
1482 SANITIZER_OPT (integer
-divide
-by
-zero
, SANITIZE_DIVIDE
, true),
1483 SANITIZER_OPT (undefined
, SANITIZE_UNDEFINED
, true),
1484 SANITIZER_OPT (unreachable
, SANITIZE_UNREACHABLE
, false),
1485 SANITIZER_OPT (vla
-bound
, SANITIZE_VLA
, true),
1486 SANITIZER_OPT (return, SANITIZE_RETURN
, false),
1487 SANITIZER_OPT (null
, SANITIZE_NULL
, true),
1488 SANITIZER_OPT (signed-integer
-overflow
, SANITIZE_SI_OVERFLOW
, true),
1489 SANITIZER_OPT (bool, SANITIZE_BOOL
, true),
1490 SANITIZER_OPT (enum, SANITIZE_ENUM
, true),
1491 SANITIZER_OPT (float-divide
-by
-zero
, SANITIZE_FLOAT_DIVIDE
, true),
1492 SANITIZER_OPT (float-cast
-overflow
, SANITIZE_FLOAT_CAST
, true),
1493 SANITIZER_OPT (bounds
, SANITIZE_BOUNDS
, true),
1494 SANITIZER_OPT (bounds
-strict
, SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
, true),
1495 SANITIZER_OPT (alignment
, SANITIZE_ALIGNMENT
, true),
1496 SANITIZER_OPT (nonnull
-attribute
, SANITIZE_NONNULL_ATTRIBUTE
, true),
1497 SANITIZER_OPT (returns
-nonnull
-attribute
, SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1499 SANITIZER_OPT (object
-size
, SANITIZE_OBJECT_SIZE
, true),
1500 SANITIZER_OPT (vptr
, SANITIZE_VPTR
, true),
1501 SANITIZER_OPT (all
, ~0U, true),
1502 #undef SANITIZER_OPT
1503 { NULL
, 0U, 0UL, false }
1506 /* Parse comma separated sanitizer suboptions from P for option SCODE,
1507 adjust previous FLAGS and return new ones. If COMPLAIN is false,
1508 don't issue diagnostics. */
1511 parse_sanitizer_options (const char *p
, location_t loc
, int scode
,
1512 unsigned int flags
, int value
, bool complain
)
1514 enum opt_code code
= (enum opt_code
) scode
;
1519 const char *comma
= strchr (p
, ',');
1531 /* Check to see if the string matches an option class name. */
1532 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1533 if (len
== sanitizer_opts
[i
].len
1534 && memcmp (p
, sanitizer_opts
[i
].name
, len
) == 0)
1536 /* Handle both -fsanitize and -fno-sanitize cases. */
1537 if (value
&& sanitizer_opts
[i
].flag
== ~0U)
1539 if (code
== OPT_fsanitize_
)
1542 error_at (loc
, "-fsanitize=all option is not valid");
1545 flags
|= ~(SANITIZE_THREAD
| SANITIZE_LEAK
1546 | SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1550 /* Do not enable -fsanitize-recover=unreachable and
1551 -fsanitize-recover=return if -fsanitize-recover=undefined
1553 if (sanitizer_opts
[i
].flag
== SANITIZE_UNDEFINED
)
1554 flags
|= (SANITIZE_UNDEFINED
1555 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
));
1557 flags
|= sanitizer_opts
[i
].flag
;
1560 flags
&= ~sanitizer_opts
[i
].flag
;
1565 if (! found
&& complain
)
1566 error_at (loc
, "unrecognized argument to -fsanitize%s= option: %q.*s",
1567 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1576 /* Handle target- and language-independent options. Return zero to
1577 generate an "unknown option" message. Only options that need
1578 extra handling need to be listed here; if you simply want
1579 DECODED->value assigned to a variable, it happens automatically. */
1582 common_handle_option (struct gcc_options
*opts
,
1583 struct gcc_options
*opts_set
,
1584 const struct cl_decoded_option
*decoded
,
1585 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1587 const struct cl_option_handlers
*handlers
,
1588 diagnostic_context
*dc
)
1590 size_t scode
= decoded
->opt_index
;
1591 const char *arg
= decoded
->arg
;
1592 int value
= decoded
->value
;
1593 enum opt_code code
= (enum opt_code
) scode
;
1595 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1600 handle_param (opts
, opts_set
, loc
, arg
);
1605 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1606 unsigned int undoc_mask
;
1609 if (lang_mask
== CL_DRIVER
)
1612 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1615 /* First display any single language specific options. */
1616 for (i
= 0; i
< cl_lang_count
; i
++)
1618 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1620 /* Next display any multi language specific options. */
1621 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1622 /* Then display any remaining, non-language options. */
1623 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1625 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1626 opts
->x_exit_after_options
= true;
1630 case OPT__target_help
:
1631 if (lang_mask
== CL_DRIVER
)
1634 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1635 opts
->x_exit_after_options
= true;
1640 const char *a
= arg
;
1641 unsigned int include_flags
= 0;
1642 /* Note - by default we include undocumented options when listing
1643 specific classes. If you only want to see documented options
1644 then add ",^undocumented" to the --help= option. E.g.:
1646 --help=target,^undocumented */
1647 unsigned int exclude_flags
= 0;
1649 if (lang_mask
== CL_DRIVER
)
1652 /* Walk along the argument string, parsing each word in turn.
1654 arg = [^]{word}[,{arg}]
1655 word = {optimizers|target|warnings|undocumented|
1656 params|common|<language>} */
1666 { "optimizers", CL_OPTIMIZATION
},
1667 { "target", CL_TARGET
},
1668 { "warnings", CL_WARNING
},
1669 { "undocumented", CL_UNDOCUMENTED
},
1670 { "params", CL_PARAMS
},
1671 { "joined", CL_JOINED
},
1672 { "separate", CL_SEPARATE
},
1673 { "common", CL_COMMON
},
1676 unsigned int *pflags
;
1678 unsigned int lang_flag
, specific_flag
;
1687 error_at (loc
, "missing argument to %qs", "--help=^");
1690 pflags
= &exclude_flags
;
1693 pflags
= &include_flags
;
1695 comma
= strchr (a
, ',');
1706 /* Check to see if the string matches an option class name. */
1707 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1708 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1710 specific_flag
= specifics
[i
].flag
;
1714 /* Check to see if the string matches a language name.
1715 Note - we rely upon the alpha-sorted nature of the entries in
1716 the lang_names array, specifically that shorter names appear
1717 before their longer variants. (i.e. C before C++). That way
1718 when we are attempting to match --help=c for example we will
1719 match with C first and not C++. */
1720 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1721 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1723 lang_flag
= 1U << i
;
1727 if (specific_flag
!= 0)
1730 *pflags
|= specific_flag
;
1733 /* The option's argument matches both the start of a
1734 language name and the start of an option class name.
1735 We have a special case for when the user has
1736 specified "--help=c", but otherwise we have to issue
1738 if (strncasecmp (a
, "c", len
) == 0)
1739 *pflags
|= lang_flag
;
1742 "--help argument %q.*s is ambiguous, "
1743 "please be more specific",
1747 else if (lang_flag
!= 0)
1748 *pflags
|= lang_flag
;
1751 "unrecognized argument to --help= option: %q.*s",
1760 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1762 opts
->x_exit_after_options
= true;
1767 if (lang_mask
== CL_DRIVER
)
1770 opts
->x_exit_after_options
= true;
1773 case OPT_fsanitize_
:
1774 opts
->x_flag_sanitize
1775 = parse_sanitizer_options (arg
, loc
, code
,
1776 opts
->x_flag_sanitize
, value
, true);
1778 /* Kernel ASan implies normal ASan but does not yet support
1780 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1782 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1783 0, opts
->x_param_values
,
1784 opts_set
->x_param_values
);
1785 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1786 opts_set
->x_param_values
);
1787 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1788 opts_set
->x_param_values
);
1789 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1790 opts
->x_param_values
,
1791 opts_set
->x_param_values
);
1795 case OPT_fsanitize_recover_
:
1796 opts
->x_flag_sanitize_recover
1797 = parse_sanitizer_options (arg
, loc
, code
,
1798 opts
->x_flag_sanitize_recover
, value
, true);
1801 case OPT_fasan_shadow_offset_
:
1805 case OPT_fsanitize_address_use_after_scope
:
1806 opts
->x_flag_sanitize_address_use_after_scope
= value
;
1809 case OPT_fsanitize_recover
:
1811 opts
->x_flag_sanitize_recover
1812 |= (SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
)
1813 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1815 opts
->x_flag_sanitize_recover
1816 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1823 /* Currently handled in a prescan. */
1827 dc
->warning_as_error_requested
= value
;
1831 if (lang_mask
== CL_DRIVER
)
1834 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1835 opts
, opts_set
, loc
, dc
);
1838 case OPT_Wlarger_than_
:
1839 opts
->x_larger_than_size
= value
;
1840 opts
->x_warn_larger_than
= value
!= -1;
1843 case OPT_Wfatal_errors
:
1844 dc
->fatal_errors
= value
;
1847 case OPT_Wframe_larger_than_
:
1848 opts
->x_frame_larger_than_size
= value
;
1849 opts
->x_warn_frame_larger_than
= value
!= -1;
1852 case OPT_Wstack_usage_
:
1853 opts
->x_warn_stack_usage
= value
;
1854 opts
->x_flag_stack_usage_info
= value
!= -1;
1857 case OPT_Wstrict_aliasing
:
1858 set_Wstrict_aliasing (opts
, value
);
1861 case OPT_Wstrict_overflow
:
1862 opts
->x_warn_strict_overflow
= (value
1863 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1867 case OPT_Wsystem_headers
:
1868 dc
->dc_warn_system_headers
= value
;
1872 opts
->x_flag_gen_aux_info
= 1;
1875 case OPT_auxbase_strip
:
1877 char *tmp
= xstrdup (arg
);
1878 strip_off_ending (tmp
, strlen (tmp
));
1880 opts
->x_aux_base_name
= tmp
;
1887 decode_d_option (arg
, opts
, loc
, dc
);
1890 case OPT_fcall_used_
:
1891 case OPT_fcall_saved_
:
1899 case OPT_fdbg_cnt_list
:
1901 opts
->x_exit_after_options
= true;
1904 case OPT_fdebug_prefix_map_
:
1908 case OPT_fdiagnostics_show_location_
:
1909 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1912 case OPT_fdiagnostics_show_caret
:
1913 dc
->show_caret
= value
;
1916 case OPT_fdiagnostics_color_
:
1917 diagnostic_color_init (dc
, value
);
1920 case OPT_fdiagnostics_parseable_fixits
:
1921 dc
->parseable_fixits_p
= value
;
1924 case OPT_fdiagnostics_show_option
:
1925 dc
->show_option_requested
= value
;
1932 case OPT_ffast_math
:
1933 set_fast_math_flags (opts
, value
);
1936 case OPT_funsafe_math_optimizations
:
1937 set_unsafe_math_optimizations_flags (opts
, value
);
1944 case OPT_finline_limit_
:
1945 set_param_value ("max-inline-insns-single", value
/ 2,
1946 opts
->x_param_values
, opts_set
->x_param_values
);
1947 set_param_value ("max-inline-insns-auto", value
/ 2,
1948 opts
->x_param_values
, opts_set
->x_param_values
);
1951 case OPT_finstrument_functions_exclude_function_list_
:
1952 add_comma_separated_to_vector
1953 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1956 case OPT_finstrument_functions_exclude_file_list_
:
1957 add_comma_separated_to_vector
1958 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1961 case OPT_fmessage_length_
:
1962 pp_set_line_maximum_length (dc
->printer
, value
);
1963 diagnostic_set_caret_max_width (dc
, value
);
1967 case OPT_fopt_info_
:
1973 const char *p
= arg
;
1974 opts
->x_flag_disable_hsa
= true;
1977 const char *comma
= strchr (p
, ',');
1979 if ((strncmp (p
, "disable", 7) == 0)
1980 && (p
[7] == ',' || p
[7] == '\0'))
1982 opts
->x_flag_disable_hsa
= true;
1986 if ((strncmp (p
, "hsa", 3) == 0)
1987 && (p
[3] == ',' || p
[3] == '\0'))
1990 opts
->x_flag_disable_hsa
= false;
1992 sorry ("HSA has not been enabled during configuration");
2002 #ifndef ACCEL_COMPILER
2003 case OPT_foffload_abi_
:
2004 error_at (loc
, "-foffload-abi option can be specified only for "
2005 "offload compiler");
2009 case OPT_fpack_struct_
:
2010 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
2012 "structure alignment must be a small power of two, not %d",
2015 opts
->x_initial_max_fld_align
= value
;
2019 case OPT_fplugin_arg_
:
2023 case OPT_fprofile_use_
:
2024 opts
->x_profile_data_prefix
= xstrdup (arg
);
2025 opts
->x_flag_profile_use
= true;
2027 /* No break here - do -fprofile-use processing. */
2029 case OPT_fprofile_use
:
2030 enable_fdo_optimizations (opts
, opts_set
, value
);
2031 if (!opts_set
->x_flag_profile_reorder_functions
)
2032 opts
->x_flag_profile_reorder_functions
= value
;
2033 /* Indirect call profiling should do all useful transformations
2034 speculative devirtualization does. */
2035 if (!opts_set
->x_flag_devirtualize_speculatively
2036 && opts
->x_flag_value_profile_transformations
)
2037 opts
->x_flag_devirtualize_speculatively
= false;
2040 case OPT_fauto_profile_
:
2041 opts
->x_auto_profile_file
= xstrdup (arg
);
2042 opts
->x_flag_auto_profile
= true;
2044 /* No break here - do -fauto-profile processing. */
2046 case OPT_fauto_profile
:
2047 enable_fdo_optimizations (opts
, opts_set
, value
);
2048 if (!opts_set
->x_flag_profile_correction
)
2049 opts
->x_flag_profile_correction
= value
;
2050 maybe_set_param_value (
2051 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
2052 opts
->x_param_values
, opts_set
->x_param_values
);
2055 case OPT_fprofile_generate_
:
2056 opts
->x_profile_data_prefix
= xstrdup (arg
);
2058 /* No break here - do -fprofile-generate processing. */
2060 case OPT_fprofile_generate
:
2061 if (!opts_set
->x_profile_arc_flag
)
2062 opts
->x_profile_arc_flag
= value
;
2063 if (!opts_set
->x_flag_profile_values
)
2064 opts
->x_flag_profile_values
= value
;
2065 if (!opts_set
->x_flag_inline_functions
)
2066 opts
->x_flag_inline_functions
= value
;
2067 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2068 quadratic. Disable the pass until better memory representation
2070 if (!opts_set
->x_flag_ipa_reference
)
2071 opts
->x_flag_ipa_reference
= false;
2074 case OPT_ftree_vectorize
:
2075 if (!opts_set
->x_flag_tree_loop_vectorize
)
2076 opts
->x_flag_tree_loop_vectorize
= value
;
2077 if (!opts_set
->x_flag_tree_slp_vectorize
)
2078 opts
->x_flag_tree_slp_vectorize
= value
;
2080 case OPT_fshow_column
:
2081 dc
->show_column
= value
;
2084 case OPT_frandom_seed
:
2085 /* The real switch is -fno-random-seed. */
2091 case OPT_frandom_seed_
:
2095 case OPT_fsched_verbose_
:
2096 #ifdef INSN_SCHEDULING
2097 /* Handled with Var in common.opt. */
2103 case OPT_fsched_stalled_insns_
:
2104 opts
->x_flag_sched_stalled_insns
= value
;
2105 if (opts
->x_flag_sched_stalled_insns
== 0)
2106 opts
->x_flag_sched_stalled_insns
= -1;
2109 case OPT_fsched_stalled_insns_dep_
:
2110 opts
->x_flag_sched_stalled_insns_dep
= value
;
2113 case OPT_fstack_check_
:
2114 if (!strcmp (arg
, "no"))
2115 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2116 else if (!strcmp (arg
, "generic"))
2117 /* This is the old stack checking method. */
2118 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2119 ? FULL_BUILTIN_STACK_CHECK
2120 : GENERIC_STACK_CHECK
;
2121 else if (!strcmp (arg
, "specific"))
2122 /* This is the new stack checking method. */
2123 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2124 ? FULL_BUILTIN_STACK_CHECK
2125 : STACK_CHECK_STATIC_BUILTIN
2126 ? STATIC_BUILTIN_STACK_CHECK
2127 : GENERIC_STACK_CHECK
;
2129 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2132 case OPT_fstack_limit
:
2133 /* The real switch is -fno-stack-limit. */
2139 case OPT_fstack_limit_register_
:
2140 case OPT_fstack_limit_symbol_
:
2144 case OPT_fstack_usage
:
2145 opts
->x_flag_stack_usage
= value
;
2146 opts
->x_flag_stack_usage_info
= value
!= 0;
2150 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2155 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2159 if (arg
&& strlen (arg
) != 0)
2161 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2162 "use %<-gdwarf-%s%> for DWARF version "
2163 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2167 value
= opts
->x_dwarf_version
;
2171 if (value
< 2 || value
> 5)
2172 error_at (loc
, "dwarf version %d is not supported", value
);
2174 opts
->x_dwarf_version
= value
;
2175 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2178 case OPT_gsplit_dwarf
:
2179 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2184 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2189 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2194 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2199 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2205 /* Handled completely via specs. */
2208 case OPT_pedantic_errors
:
2209 dc
->pedantic_errors
= 1;
2210 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2212 handlers
, opts
, opts_set
,
2217 opts
->x_flag_lto
= value
? "" : NULL
;
2221 dc
->dc_inhibit_warnings
= true;
2224 case OPT_fmax_errors_
:
2225 dc
->max_errors
= value
;
2228 case OPT_fuse_ld_bfd
:
2229 case OPT_fuse_ld_gold
:
2230 case OPT_fuse_linker_plugin
:
2231 /* No-op. Used by the driver and passed to us because it starts with f.*/
2236 opts
->x_flag_trapv
= 0;
2241 opts
->x_flag_wrapv
= 0;
2245 opts
->x_flag_ipa_icf_functions
= value
;
2246 opts
->x_flag_ipa_icf_variables
= value
;
2250 /* If the flag was handled in a standard way, assume the lack of
2251 processing here is intentional. */
2252 gcc_assert (option_flag_var (scode
, opts
));
2256 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2261 /* Handle --param NAME=VALUE. */
2263 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2264 location_t loc
, const char *carg
)
2269 arg
= xstrdup (carg
);
2270 equal
= strchr (arg
, '=');
2272 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2278 enum compiler_param index
;
2279 if (!find_param (arg
, &index
))
2281 const char *suggestion
= find_param_fuzzy (arg
);
2283 error_at (loc
, "invalid --param name %qs; did you mean %qs?",
2286 error_at (loc
, "invalid --param name %qs", arg
);
2290 if (!param_string_value_p (index
, equal
+ 1, &value
))
2291 value
= integral_argument (equal
+ 1);
2294 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2296 set_param_value (arg
, value
,
2297 opts
->x_param_values
, opts_set
->x_param_values
);
2304 /* Used to set the level of strict aliasing warnings in OPTS,
2305 when no level is specified (i.e., when -Wstrict-aliasing, and not
2306 -Wstrict-aliasing=level was given).
2307 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2308 and 0 otherwise. After calling this function, wstrict_aliasing will be
2309 set to the default value of -Wstrict_aliasing=level, currently 3. */
2311 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2313 gcc_assert (onoff
== 0 || onoff
== 1);
2315 opts
->x_warn_strict_aliasing
= 3;
2317 opts
->x_warn_strict_aliasing
= 0;
2320 /* The following routines are useful in setting all the flags that
2321 -ffast-math and -fno-fast-math imply. */
2323 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2325 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2327 opts
->x_flag_unsafe_math_optimizations
= set
;
2328 set_unsafe_math_optimizations_flags (opts
, set
);
2330 if (!opts
->frontend_set_flag_finite_math_only
)
2331 opts
->x_flag_finite_math_only
= set
;
2332 if (!opts
->frontend_set_flag_errno_math
)
2333 opts
->x_flag_errno_math
= !set
;
2336 if (!opts
->frontend_set_flag_signaling_nans
)
2337 opts
->x_flag_signaling_nans
= 0;
2338 if (!opts
->frontend_set_flag_rounding_math
)
2339 opts
->x_flag_rounding_math
= 0;
2340 if (!opts
->frontend_set_flag_cx_limited_range
)
2341 opts
->x_flag_cx_limited_range
= 1;
2345 /* When -funsafe-math-optimizations is set the following
2346 flags are set as well. */
2348 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2350 if (!opts
->frontend_set_flag_trapping_math
)
2351 opts
->x_flag_trapping_math
= !set
;
2352 if (!opts
->frontend_set_flag_signed_zeros
)
2353 opts
->x_flag_signed_zeros
= !set
;
2354 if (!opts
->frontend_set_flag_associative_math
)
2355 opts
->x_flag_associative_math
= set
;
2356 if (!opts
->frontend_set_flag_reciprocal_math
)
2357 opts
->x_flag_reciprocal_math
= set
;
2360 /* Return true iff flags in OPTS are set as if -ffast-math. */
2362 fast_math_flags_set_p (const struct gcc_options
*opts
)
2364 return (!opts
->x_flag_trapping_math
2365 && opts
->x_flag_unsafe_math_optimizations
2366 && opts
->x_flag_finite_math_only
2367 && !opts
->x_flag_signed_zeros
2368 && !opts
->x_flag_errno_math
);
2371 /* Return true iff flags are set as if -ffast-math but using the flags stored
2372 in the struct cl_optimization structure. */
2374 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2376 return (!opt
->x_flag_trapping_math
2377 && opt
->x_flag_unsafe_math_optimizations
2378 && opt
->x_flag_finite_math_only
2379 && !opt
->x_flag_signed_zeros
2380 && !opt
->x_flag_errno_math
);
2383 /* Handle a debug output -g switch for options OPTS
2384 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2385 explicitly), location LOC. EXTENDED is true or false to support
2386 extended output (2 is special and means "-ggdb" was given). */
2388 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2389 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2392 opts
->x_use_gnu_debug_info_extensions
= extended
;
2394 if (type
== NO_DEBUG
)
2396 if (opts
->x_write_symbols
== NO_DEBUG
)
2398 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2402 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2403 opts
->x_write_symbols
= DWARF2_DEBUG
;
2404 #elif defined DBX_DEBUGGING_INFO
2405 opts
->x_write_symbols
= DBX_DEBUG
;
2409 if (opts
->x_write_symbols
== NO_DEBUG
)
2410 warning_at (loc
, 0, "target system does not support debug output");
2415 /* Does it conflict with an already selected type? */
2416 if (opts_set
->x_write_symbols
!= NO_DEBUG
2417 && opts
->x_write_symbols
!= NO_DEBUG
2418 && type
!= opts
->x_write_symbols
)
2419 error_at (loc
, "debug format %qs conflicts with prior selection",
2420 debug_type_names
[type
]);
2421 opts
->x_write_symbols
= type
;
2422 opts_set
->x_write_symbols
= type
;
2425 /* A debug flag without a level defaults to level 2.
2426 If off or at level 1, set it to level 2, but if already
2427 at level 3, don't lower it. */
2430 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2431 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2435 int argval
= integral_argument (arg
);
2437 error_at (loc
, "unrecognised debug output level %qs", arg
);
2438 else if (argval
> 3)
2439 error_at (loc
, "debug output level %qs is too high", arg
);
2441 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2445 /* Arrange to dump core on error for diagnostic context DC. (The
2446 regular error message is still printed first, except in the case of
2450 setup_core_dumping (diagnostic_context
*dc
)
2453 signal (SIGABRT
, SIG_DFL
);
2455 #if defined(HAVE_SETRLIMIT)
2458 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2459 fatal_error (input_location
, "getting core file size maximum limit: %m");
2460 rlim
.rlim_cur
= rlim
.rlim_max
;
2461 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2462 fatal_error (input_location
,
2463 "setting core file size limit to maximum: %m");
2466 diagnostic_abort_on_error (dc
);
2469 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2470 diagnostic context DC. */
2473 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2474 location_t loc
, diagnostic_context
*dc
)
2482 opts
->x_flag_debug_asm
= 1;
2485 opts
->x_flag_print_asm_name
= 1;
2488 opts
->x_flag_dump_rtl_in_asm
= 1;
2489 opts
->x_flag_print_asm_name
= 1;
2492 opts
->x_rtl_dump_and_exit
= 1;
2494 case 'D': /* These are handled by the preprocessor. */
2501 setup_core_dumping (dc
);
2504 opts
->x_flag_dump_all_passed
= true;
2508 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2513 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2514 mask LANG_MASK, option handlers HANDLERS) as an error for option
2515 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2516 NULL), location LOC. This is used by -Werror=. */
2519 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2520 const struct cl_option_handlers
*handlers
,
2521 struct gcc_options
*opts
,
2522 struct gcc_options
*opts_set
,
2523 location_t loc
, diagnostic_context
*dc
)
2528 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2529 new_option
[0] = 'W';
2530 strcpy (new_option
+ 1, arg
);
2531 option_index
= find_opt (new_option
, lang_mask
);
2532 if (option_index
== OPT_SPECIAL_unknown
)
2533 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2534 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2535 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2539 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2540 const char *arg
= NULL
;
2542 if (cl_options
[option_index
].flags
& CL_JOINED
)
2543 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2544 control_warning_option (option_index
, (int) kind
, arg
, value
,
2546 handlers
, opts
, opts_set
, dc
);
2551 /* Return malloced memory for the name of the option OPTION_INDEX
2552 which enabled a diagnostic (context CONTEXT), originally of type
2553 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2557 option_name (diagnostic_context
*context
, int option_index
,
2558 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2562 /* A warning classified as an error. */
2563 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2564 && diag_kind
== DK_ERROR
)
2565 return concat (cl_options
[OPT_Werror_
].opt_text
,
2566 /* Skip over "-W". */
2567 cl_options
[option_index
].opt_text
+ 2,
2569 /* A warning with option. */
2571 return xstrdup (cl_options
[option_index
].opt_text
);
2573 /* A warning without option classified as an error. */
2574 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2575 || diag_kind
== DK_WARNING
)
2576 && context
->warning_as_error_requested
)
2577 return xstrdup (cl_options
[OPT_Werror
].opt_text
);