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_ftree_pre
, NULL
, 1 },
504 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
505 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
506 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp_alignment
, NULL
, 1 },
507 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
508 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
509 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
510 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
511 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
512 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
513 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
514 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
515 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
516 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
517 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
518 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
519 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
520 { OPT_LEVELS_2_PLUS
, OPT_fipa_ra
, NULL
, 1 },
521 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
523 /* -O3 optimizations. */
524 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
525 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
526 { OPT_LEVELS_3_PLUS
, OPT_fsplit_paths
, NULL
, 1 },
527 /* Inlining of functions reducing size is a good idea with -Os
528 regardless of them being declared inline. */
529 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
530 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
531 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
532 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
533 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
534 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
535 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
536 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
537 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
539 /* -Ofast adds optimizations to -O3. */
540 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
542 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
545 /* Default the options in OPTS and OPTS_SET based on the optimization
546 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
548 default_options_optimization (struct gcc_options
*opts
,
549 struct gcc_options
*opts_set
,
550 struct cl_decoded_option
*decoded_options
,
551 unsigned int decoded_options_count
,
553 unsigned int lang_mask
,
554 const struct cl_option_handlers
*handlers
,
555 diagnostic_context
*dc
)
559 bool openacc_mode
= false;
561 /* Scan to see what optimization level has been specified. That will
562 determine the default value of many flags. */
563 for (i
= 1; i
< decoded_options_count
; i
++)
565 struct cl_decoded_option
*opt
= &decoded_options
[i
];
566 switch (opt
->opt_index
)
569 if (*opt
->arg
== '\0')
571 opts
->x_optimize
= 1;
572 opts
->x_optimize_size
= 0;
573 opts
->x_optimize_fast
= 0;
574 opts
->x_optimize_debug
= 0;
578 const int optimize_val
= integral_argument (opt
->arg
);
579 if (optimize_val
== -1)
580 error_at (loc
, "argument to %<-O%> should be a non-negative "
581 "integer, %<g%>, %<s%> or %<fast%>");
584 opts
->x_optimize
= optimize_val
;
585 if ((unsigned int) opts
->x_optimize
> 255)
586 opts
->x_optimize
= 255;
587 opts
->x_optimize_size
= 0;
588 opts
->x_optimize_fast
= 0;
589 opts
->x_optimize_debug
= 0;
595 opts
->x_optimize_size
= 1;
597 /* Optimizing for size forces optimize to be 2. */
598 opts
->x_optimize
= 2;
599 opts
->x_optimize_fast
= 0;
600 opts
->x_optimize_debug
= 0;
604 /* -Ofast only adds flags to -O3. */
605 opts
->x_optimize_size
= 0;
606 opts
->x_optimize
= 3;
607 opts
->x_optimize_fast
= 1;
608 opts
->x_optimize_debug
= 0;
612 /* -Og selects optimization level 1. */
613 opts
->x_optimize_size
= 0;
614 opts
->x_optimize
= 1;
615 opts
->x_optimize_fast
= 0;
616 opts
->x_optimize_debug
= 1;
625 /* Ignore other options in this prescan. */
630 maybe_default_options (opts
, opts_set
, default_options_table
,
631 opts
->x_optimize
, opts
->x_optimize_size
,
632 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
633 lang_mask
, handlers
, loc
, dc
);
635 /* -O2 param settings. */
636 opt2
= (opts
->x_optimize
>= 2);
639 && !opts_set
->x_flag_ipa_pta
)
640 opts
->x_flag_ipa_pta
= true;
642 /* Track fields in field-sensitive alias analysis. */
643 maybe_set_param_value
644 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
645 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
646 opts
->x_param_values
, opts_set
->x_param_values
);
648 /* For -O1 only do loop invariant motion for very small loops. */
649 maybe_set_param_value
650 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
651 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
652 opts
->x_param_values
, opts_set
->x_param_values
);
654 /* At -Ofast, allow store motion to introduce potential race conditions. */
655 maybe_set_param_value
656 (PARAM_ALLOW_STORE_DATA_RACES
,
657 opts
->x_optimize_fast
? 1
658 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
659 opts
->x_param_values
, opts_set
->x_param_values
);
661 if (opts
->x_optimize_size
)
662 /* We want to crossjump as much as possible. */
663 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
664 opts
->x_param_values
, opts_set
->x_param_values
);
666 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
667 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
668 opts
->x_param_values
, opts_set
->x_param_values
);
670 /* Restrict the amount of work combine does at -Og while retaining
671 most of its useful transforms. */
672 if (opts
->x_optimize_debug
)
673 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
674 opts
->x_param_values
, opts_set
->x_param_values
);
676 /* Allow default optimizations to be specified on a per-machine basis. */
677 maybe_default_options (opts
, opts_set
,
678 targetm_common
.option_optimization_table
,
679 opts
->x_optimize
, opts
->x_optimize_size
,
680 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
681 lang_mask
, handlers
, loc
, dc
);
684 /* After all options at LOC have been read into OPTS and OPTS_SET,
685 finalize settings of those options and diagnose incompatible
688 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
691 enum unwind_info_type ui_except
;
693 if (opts
->x_dump_base_name
694 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
695 && ! opts
->x_dump_base_name_prefixed
)
697 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
698 OPTS->X_DUMP_DIR_NAME directory. Then try to make
699 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
700 directory, typically the directory to contain the object
702 if (opts
->x_dump_dir_name
)
703 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
704 opts
->x_dump_base_name
, NULL
);
705 else if (opts
->x_aux_base_name
706 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
708 const char *aux_base
;
710 base_of_path (opts
->x_aux_base_name
, &aux_base
);
711 if (opts
->x_aux_base_name
!= aux_base
)
713 int dir_len
= aux_base
- opts
->x_aux_base_name
;
714 char *new_dump_base_name
715 = XOBNEWVEC (&opts_obstack
, char,
716 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
718 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
719 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
720 /* Append existing OPTS->X_DUMP_BASE_NAME. */
721 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
722 opts
->x_dump_base_name
= new_dump_base_name
;
725 opts
->x_dump_base_name_prefixed
= true;
728 /* Handle related options for unit-at-a-time, toplevel-reorder, and
730 if (!opts
->x_flag_unit_at_a_time
)
732 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
733 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
735 opts
->x_flag_section_anchors
= 0;
736 if (opts
->x_flag_toplevel_reorder
== 1)
737 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
739 opts
->x_flag_toplevel_reorder
= 0;
742 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
743 sorry ("transactional memory is not supported with non-call exceptions");
745 /* Unless the user has asked for section anchors, we disable toplevel
746 reordering at -O0 to disable transformations that might be surprising
747 to end users and to get -fno-toplevel-reorder tested. */
748 if (!opts
->x_optimize
749 && opts
->x_flag_toplevel_reorder
== 2
750 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
752 opts
->x_flag_toplevel_reorder
= 0;
753 opts
->x_flag_section_anchors
= 0;
755 if (!opts
->x_flag_toplevel_reorder
)
757 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
758 error_at (loc
, "section anchors must be disabled when toplevel reorder"
760 opts
->x_flag_section_anchors
= 0;
763 if (!opts
->x_flag_opts_finished
)
765 /* We initialize opts->x_flag_pie to -1 so that targets can set a
767 if (opts
->x_flag_pie
== -1)
769 if (opts
->x_flag_pic
== 0)
770 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
772 opts
->x_flag_pie
= 0;
774 if (opts
->x_flag_pie
)
775 opts
->x_flag_pic
= opts
->x_flag_pie
;
776 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
777 opts
->x_flag_shlib
= 1;
778 opts
->x_flag_opts_finished
= true;
781 /* We initialize opts->x_flag_stack_protect to -1 so that targets
782 can set a default value. */
783 if (opts
->x_flag_stack_protect
== -1)
784 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
786 if (opts
->x_optimize
== 0)
788 /* Inlining does not work if not optimizing,
789 so force it not to be done. */
790 opts
->x_warn_inline
= 0;
791 opts
->x_flag_no_inline
= 1;
794 /* The optimization to partition hot and cold basic blocks into separate
795 sections of the .o and executable files does not work (currently)
796 with exception handling. This is because there is no support for
797 generating unwind info. If opts->x_flag_exceptions is turned on
798 we need to turn off the partitioning optimization. */
800 ui_except
= targetm_common
.except_unwind_info (opts
);
802 if (opts
->x_flag_exceptions
803 && opts
->x_flag_reorder_blocks_and_partition
804 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
806 if (opts_set
->x_flag_reorder_blocks_and_partition
)
808 "-freorder-blocks-and-partition does not work "
809 "with exceptions on this architecture");
810 opts
->x_flag_reorder_blocks_and_partition
= 0;
811 opts
->x_flag_reorder_blocks
= 1;
814 /* If user requested unwind info, then turn off the partitioning
817 if (opts
->x_flag_unwind_tables
818 && !targetm_common
.unwind_tables_default
819 && opts
->x_flag_reorder_blocks_and_partition
820 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
822 if (opts_set
->x_flag_reorder_blocks_and_partition
)
824 "-freorder-blocks-and-partition does not support "
825 "unwind info on this architecture");
826 opts
->x_flag_reorder_blocks_and_partition
= 0;
827 opts
->x_flag_reorder_blocks
= 1;
830 /* If the target requested unwind info, then turn off the partitioning
831 optimization with a different message. Likewise, if the target does not
832 support named sections. */
834 if (opts
->x_flag_reorder_blocks_and_partition
835 && (!targetm_common
.have_named_sections
836 || (opts
->x_flag_unwind_tables
837 && targetm_common
.unwind_tables_default
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 work "
843 "on this architecture");
844 opts
->x_flag_reorder_blocks_and_partition
= 0;
845 opts
->x_flag_reorder_blocks
= 1;
848 /* Disable -freorder-blocks-and-partition when -fprofile-use is not in
849 effect. Function splitting was not actually being performed in that case,
850 as probably_never_executed_bb_p does not distinguish any basic blocks as
851 being cold vs hot when there is no profile data. Leaving it enabled,
852 however, causes the assembly code generator to create (empty) cold
853 sections and labels, leading to unnecessary size overhead. */
854 if (opts
->x_flag_reorder_blocks_and_partition
855 && !opts_set
->x_flag_profile_use
)
856 opts
->x_flag_reorder_blocks_and_partition
= 0;
858 if (opts
->x_flag_reorder_blocks_and_partition
859 && !opts_set
->x_flag_reorder_functions
)
860 opts
->x_flag_reorder_functions
= 1;
862 /* Pipelining of outer loops is only possible when general pipelining
863 capabilities are requested. */
864 if (!opts
->x_flag_sel_sched_pipelining
)
865 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
867 if (opts
->x_flag_conserve_stack
)
869 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
870 opts
->x_param_values
, opts_set
->x_param_values
);
871 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
872 opts
->x_param_values
, opts_set
->x_param_values
);
875 if (opts
->x_flag_lto
)
878 opts
->x_flag_generate_lto
= 1;
880 /* When generating IL, do not operate in whole-program mode.
881 Otherwise, symbols will be privatized too early, causing link
883 opts
->x_flag_whole_program
= 0;
885 error_at (loc
, "LTO support has not been enabled in this configuration");
887 if (!opts
->x_flag_fat_lto_objects
889 || (opts_set
->x_flag_use_linker_plugin
890 && !opts
->x_flag_use_linker_plugin
)))
892 if (opts_set
->x_flag_fat_lto_objects
)
893 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
894 opts
->x_flag_fat_lto_objects
= 1;
898 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
899 default value if they choose based on other options. */
900 if (opts
->x_flag_split_stack
== -1)
901 opts
->x_flag_split_stack
= 0;
902 else if (opts
->x_flag_split_stack
)
904 if (!targetm_common
.supports_split_stack (true, opts
))
906 error_at (loc
, "%<-fsplit-stack%> is not supported by "
907 "this compiler configuration");
908 opts
->x_flag_split_stack
= 0;
912 /* Tune vectorization related parametees according to cost model. */
913 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
915 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
916 6, opts
->x_param_values
, opts_set
->x_param_values
);
917 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
918 0, opts
->x_param_values
, opts_set
->x_param_values
);
919 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
920 0, opts
->x_param_values
, opts_set
->x_param_values
);
923 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
925 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
926 || !opts
->x_flag_tree_loop_if_convert
)
927 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
928 opts
->x_param_values
, opts_set
->x_param_values
);
930 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
931 if (opts
->x_dwarf_split_debug_info
)
932 opts
->x_debug_generate_pub_sections
= 2;
934 /* Userspace and kernel ASan conflict with each other. */
936 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
937 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
939 "-fsanitize=address is incompatible with "
940 "-fsanitize=kernel-address");
944 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
945 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
947 "-fsanitize=address and -fsanitize=kernel-address "
948 "are incompatible with -fsanitize=thread");
950 /* Error recovery is not allowed for LSan and TSan. */
952 if (opts
->x_flag_sanitize_recover
& SANITIZE_THREAD
)
953 error_at (loc
, "-fsanitize-recover=thread is not supported");
955 if (opts
->x_flag_sanitize_recover
& SANITIZE_LEAK
)
956 error_at (loc
, "-fsanitize-recover=leak is not supported");
958 /* When instrumenting the pointers, we don't want to remove
959 the null pointer checks. */
960 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
961 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
962 opts
->x_flag_delete_null_pointer_checks
= 0;
964 /* Aggressive compiler optimizations may cause false negatives. */
965 if (opts
->x_flag_sanitize
)
967 opts
->x_flag_aggressive_loop_optimizations
= 0;
968 opts
->x_flag_strict_overflow
= 0;
972 #define LEFT_COLUMN 27
974 /* Output ITEM, of length ITEM_WIDTH, in the left column,
975 followed by word-wrapped HELP in a second column. */
977 wrap_help (const char *help
,
979 unsigned int item_width
,
980 unsigned int columns
)
982 unsigned int col_width
= LEFT_COLUMN
;
983 unsigned int remaining
, room
, len
;
985 remaining
= strlen (help
);
989 room
= columns
- 3 - MAX (col_width
, item_width
);
998 for (i
= 0; help
[i
]; i
++)
1000 if (i
>= room
&& len
!= remaining
)
1004 else if ((help
[i
] == '-' || help
[i
] == '/')
1005 && help
[i
+ 1] != ' '
1006 && i
> 0 && ISALPHA (help
[i
- 1]))
1011 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1013 while (help
[len
] == ' ')
1021 /* Print help for a specific front-end, etc. */
1023 print_filtered_help (unsigned int include_flags
,
1024 unsigned int exclude_flags
,
1025 unsigned int any_flags
,
1026 unsigned int columns
,
1027 struct gcc_options
*opts
,
1028 unsigned int lang_mask
)
1033 bool displayed
= false;
1036 if (include_flags
== CL_PARAMS
)
1038 for (i
= 0; i
< LAST_PARAM
; i
++)
1040 const char *param
= compiler_params
[i
].option
;
1042 help
= compiler_params
[i
].help
;
1043 if (help
== NULL
|| *help
== '\0')
1045 if (exclude_flags
& CL_UNDOCUMENTED
)
1047 help
= undocumented_msg
;
1050 /* Get the translation. */
1053 if (!opts
->x_quiet_flag
)
1055 snprintf (new_help
, sizeof (new_help
),
1056 _("default %d minimum %d maximum %d"),
1057 compiler_params
[i
].default_value
,
1058 compiler_params
[i
].min_value
,
1059 compiler_params
[i
].max_value
);
1062 wrap_help (help
, param
, strlen (param
), columns
);
1068 if (!opts
->x_help_printed
)
1069 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1071 if (!opts
->x_help_enum_printed
)
1072 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1074 for (i
= 0; i
< cl_options_count
; i
++)
1076 const struct cl_option
*option
= cl_options
+ i
;
1081 if (include_flags
== 0
1082 || ((option
->flags
& include_flags
) != include_flags
))
1084 if ((option
->flags
& any_flags
) == 0)
1088 /* Skip unwanted switches. */
1089 if ((option
->flags
& exclude_flags
) != 0)
1092 /* The driver currently prints its own help text. */
1093 if ((option
->flags
& CL_DRIVER
) != 0
1094 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1095 | CL_COMMON
| CL_TARGET
)) == 0)
1099 /* Skip switches that have already been printed. */
1100 if (opts
->x_help_printed
[i
])
1103 opts
->x_help_printed
[i
] = true;
1105 help
= option
->help
;
1108 if (exclude_flags
& CL_UNDOCUMENTED
)
1111 help
= undocumented_msg
;
1114 if (option
->alias_target
< N_OPTS
1115 && cl_options
[option
->alias_target
].help
)
1117 if (help
== undocumented_msg
)
1119 /* For undocumented options that are aliases for other options
1120 that are documented, point the reader to the other option in
1121 preference of the former. */
1122 snprintf (new_help
, sizeof new_help
,
1123 _("Same as %s. Use the latter option instead."),
1124 cl_options
[option
->alias_target
].opt_text
);
1128 /* For documented options with aliases, mention the aliased
1129 option's name for reference. */
1130 snprintf (new_help
, sizeof new_help
,
1131 _("%s Same as %s."),
1132 help
, cl_options
[option
->alias_target
].opt_text
);
1138 if (option
->warn_message
)
1140 /* Mention that the use of the option will trigger a warning. */
1141 if (help
== new_help
)
1142 snprintf (new_help
+ strlen (new_help
),
1143 sizeof new_help
- strlen (new_help
),
1144 " %s", _(use_diagnosed_msg
));
1146 snprintf (new_help
, sizeof new_help
,
1147 "%s %s", help
, _(use_diagnosed_msg
));
1152 /* Get the translation. */
1155 /* Find the gap between the name of the
1156 option and its descriptive text. */
1157 tab
= strchr (help
, '\t');
1166 opt
= option
->opt_text
;
1170 /* With the -Q option enabled we change the descriptive text associated
1171 with an option to be an indication of its current setting. */
1172 if (!opts
->x_quiet_flag
)
1174 void *flag_var
= option_flag_var (i
, opts
);
1176 if (len
< (LEFT_COLUMN
+ 2))
1177 strcpy (new_help
, "\t\t");
1179 strcpy (new_help
, "\t");
1181 if (flag_var
!= NULL
1182 && option
->var_type
!= CLVC_DEFER
)
1184 if (option
->flags
& CL_JOINED
)
1186 if (option
->var_type
== CLVC_STRING
)
1188 if (* (const char **) flag_var
!= NULL
)
1189 snprintf (new_help
+ strlen (new_help
),
1190 sizeof (new_help
) - strlen (new_help
),
1191 "%s", * (const char **) flag_var
);
1193 else if (option
->var_type
== CLVC_ENUM
)
1195 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1197 const char *arg
= NULL
;
1199 value
= e
->get (flag_var
);
1200 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1202 arg
= _("[default]");
1203 snprintf (new_help
+ strlen (new_help
),
1204 sizeof (new_help
) - strlen (new_help
),
1208 sprintf (new_help
+ strlen (new_help
),
1209 "%#x", * (int *) flag_var
);
1212 strcat (new_help
, option_enabled (i
, opts
)
1213 ? _("[enabled]") : _("[disabled]"));
1219 wrap_help (help
, opt
, len
, columns
);
1222 if (option
->var_type
== CLVC_ENUM
1223 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1224 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1229 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1232 printf (_(" No options with the desired characteristics were found\n"));
1237 /* PR 31349: Tell the user how to see all of the
1238 options supported by a specific front end. */
1239 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1240 if ((1U << i
) & langs
)
1241 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1242 lang_names
[i
], lang_names
[i
]);
1246 else if (! displayed
)
1247 printf (_(" All options with the desired characteristics have already been displayed\n"));
1251 /* Print details of enumerated option arguments, if those
1252 enumerations have help text headings provided. If no help text
1253 is provided, presume that the possible values are listed in the
1254 help text for the relevant options. */
1255 for (i
= 0; i
< cl_enums_count
; i
++)
1257 unsigned int j
, pos
;
1259 if (opts
->x_help_enum_printed
[i
] != 1)
1261 if (cl_enums
[i
].help
== NULL
)
1263 printf (" %s\n ", _(cl_enums
[i
].help
));
1265 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1267 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1269 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1271 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1281 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1286 opts
->x_help_enum_printed
[i
] = 2;
1290 /* Display help for a specified type of option.
1291 The options must have ALL of the INCLUDE_FLAGS set
1292 ANY of the flags in the ANY_FLAGS set
1293 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1294 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1296 print_specific_help (unsigned int include_flags
,
1297 unsigned int exclude_flags
,
1298 unsigned int any_flags
,
1299 struct gcc_options
*opts
,
1300 unsigned int lang_mask
)
1302 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1303 const char * description
= NULL
;
1304 const char * descrip_extra
= "";
1308 /* Sanity check: Make sure that we do not have more
1309 languages than we have bits available to enumerate them. */
1310 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1312 /* If we have not done so already, obtain
1313 the desired maximum width of the output. */
1314 if (opts
->x_help_columns
== 0)
1316 opts
->x_help_columns
= get_terminal_width ();
1317 if (opts
->x_help_columns
== INT_MAX
)
1318 /* Use a reasonable default. */
1319 opts
->x_help_columns
= 80;
1322 /* Decide upon the title for the options that we are going to display. */
1323 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1325 switch (flag
& include_flags
)
1332 description
= _("The following options are target specific");
1335 description
= _("The following options control compiler warning messages");
1337 case CL_OPTIMIZATION
:
1338 description
= _("The following options control optimizations");
1341 description
= _("The following options are language-independent");
1344 description
= _("The --param option recognizes the following as parameters");
1347 if (i
>= cl_lang_count
)
1349 if (exclude_flags
& all_langs_mask
)
1350 description
= _("The following options are specific to just the language ");
1352 description
= _("The following options are supported by the language ");
1353 descrip_extra
= lang_names
[i
];
1358 if (description
== NULL
)
1362 if (include_flags
& CL_UNDOCUMENTED
)
1363 description
= _("The following options are not documented");
1364 else if (include_flags
& CL_SEPARATE
)
1365 description
= _("The following options take separate arguments");
1366 else if (include_flags
& CL_JOINED
)
1367 description
= _("The following options take joined arguments");
1370 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1377 if (any_flags
& all_langs_mask
)
1378 description
= _("The following options are language-related");
1380 description
= _("The following options are language-independent");
1384 printf ("%s%s:\n", description
, descrip_extra
);
1385 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1386 opts
->x_help_columns
, opts
, lang_mask
);
1389 /* Enable FDO-related flags. */
1392 enable_fdo_optimizations (struct gcc_options
*opts
,
1393 struct gcc_options
*opts_set
,
1396 if (!opts_set
->x_flag_branch_probabilities
)
1397 opts
->x_flag_branch_probabilities
= value
;
1398 if (!opts_set
->x_flag_profile_values
)
1399 opts
->x_flag_profile_values
= value
;
1400 if (!opts_set
->x_flag_unroll_loops
)
1401 opts
->x_flag_unroll_loops
= value
;
1402 if (!opts_set
->x_flag_peel_loops
)
1403 opts
->x_flag_peel_loops
= value
;
1404 if (!opts_set
->x_flag_tracer
)
1405 opts
->x_flag_tracer
= value
;
1406 if (!opts_set
->x_flag_value_profile_transformations
)
1407 opts
->x_flag_value_profile_transformations
= value
;
1408 if (!opts_set
->x_flag_inline_functions
)
1409 opts
->x_flag_inline_functions
= value
;
1410 if (!opts_set
->x_flag_ipa_cp
)
1411 opts
->x_flag_ipa_cp
= value
;
1412 if (!opts_set
->x_flag_ipa_cp_clone
1413 && value
&& opts
->x_flag_ipa_cp
)
1414 opts
->x_flag_ipa_cp_clone
= value
;
1415 if (!opts_set
->x_flag_ipa_cp_alignment
1416 && value
&& opts
->x_flag_ipa_cp
)
1417 opts
->x_flag_ipa_cp_alignment
= value
;
1418 if (!opts_set
->x_flag_predictive_commoning
)
1419 opts
->x_flag_predictive_commoning
= value
;
1420 if (!opts_set
->x_flag_unswitch_loops
)
1421 opts
->x_flag_unswitch_loops
= value
;
1422 if (!opts_set
->x_flag_gcse_after_reload
)
1423 opts
->x_flag_gcse_after_reload
= value
;
1424 if (!opts_set
->x_flag_tree_loop_vectorize
1425 && !opts_set
->x_flag_tree_vectorize
)
1426 opts
->x_flag_tree_loop_vectorize
= value
;
1427 if (!opts_set
->x_flag_tree_slp_vectorize
1428 && !opts_set
->x_flag_tree_vectorize
)
1429 opts
->x_flag_tree_slp_vectorize
= value
;
1430 if (!opts_set
->x_flag_vect_cost_model
)
1431 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1432 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1433 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1436 /* -f{,no-}sanitize{,-recover}= suboptions. */
1437 static const struct sanitizer_opts_s
1439 const char *const name
;
1442 } sanitizer_opts
[] =
1444 #define SANITIZER_OPT(name, flags) { #name, flags, sizeof #name - 1 }
1445 SANITIZER_OPT (address
, SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
),
1446 SANITIZER_OPT (kernel
-address
, SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
),
1447 SANITIZER_OPT (thread
, SANITIZE_THREAD
),
1448 SANITIZER_OPT (leak
, SANITIZE_LEAK
),
1449 SANITIZER_OPT (shift
, SANITIZE_SHIFT
),
1450 SANITIZER_OPT (integer
-divide
-by
-zero
, SANITIZE_DIVIDE
),
1451 SANITIZER_OPT (undefined
, SANITIZE_UNDEFINED
),
1452 SANITIZER_OPT (unreachable
, SANITIZE_UNREACHABLE
),
1453 SANITIZER_OPT (vla
-bound
, SANITIZE_VLA
),
1454 SANITIZER_OPT (return, SANITIZE_RETURN
),
1455 SANITIZER_OPT (null
, SANITIZE_NULL
),
1456 SANITIZER_OPT (signed-integer
-overflow
, SANITIZE_SI_OVERFLOW
),
1457 SANITIZER_OPT (bool, SANITIZE_BOOL
),
1458 SANITIZER_OPT (enum, SANITIZE_ENUM
),
1459 SANITIZER_OPT (float-divide
-by
-zero
, SANITIZE_FLOAT_DIVIDE
),
1460 SANITIZER_OPT (float-cast
-overflow
, SANITIZE_FLOAT_CAST
),
1461 SANITIZER_OPT (bounds
, SANITIZE_BOUNDS
),
1462 SANITIZER_OPT (bounds
-strict
, SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
),
1463 SANITIZER_OPT (alignment
, SANITIZE_ALIGNMENT
),
1464 SANITIZER_OPT (nonnull
-attribute
, SANITIZE_NONNULL_ATTRIBUTE
),
1465 SANITIZER_OPT (returns
-nonnull
-attribute
, SANITIZE_RETURNS_NONNULL_ATTRIBUTE
),
1466 SANITIZER_OPT (object
-size
, SANITIZE_OBJECT_SIZE
),
1467 SANITIZER_OPT (vptr
, SANITIZE_VPTR
),
1468 SANITIZER_OPT (all
, ~0),
1469 #undef SANITIZER_OPT
1473 /* Parse comma separated sanitizer suboptions from P for option SCODE,
1474 adjust previous FLAGS and return new ones. If COMPLAIN is false,
1475 don't issue diagnostics. */
1478 parse_sanitizer_options (const char *p
, location_t loc
, int scode
,
1479 unsigned int flags
, int value
, bool complain
)
1481 enum opt_code code
= (enum opt_code
) scode
;
1486 const char *comma
= strchr (p
, ',');
1498 /* Check to see if the string matches an option class name. */
1499 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1500 if (len
== sanitizer_opts
[i
].len
1501 && memcmp (p
, sanitizer_opts
[i
].name
, len
) == 0)
1503 /* Handle both -fsanitize and -fno-sanitize cases. */
1504 if (value
&& sanitizer_opts
[i
].flag
== ~0U)
1506 if (code
== OPT_fsanitize_
)
1509 error_at (loc
, "-fsanitize=all option is not valid");
1512 flags
|= ~(SANITIZE_USER_ADDRESS
| SANITIZE_THREAD
1516 flags
|= sanitizer_opts
[i
].flag
;
1518 flags
&= ~sanitizer_opts
[i
].flag
;
1523 if (! found
&& complain
)
1524 error_at (loc
, "unrecognized argument to -fsanitize%s= option: %q.*s",
1525 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1534 /* Handle target- and language-independent options. Return zero to
1535 generate an "unknown option" message. Only options that need
1536 extra handling need to be listed here; if you simply want
1537 DECODED->value assigned to a variable, it happens automatically. */
1540 common_handle_option (struct gcc_options
*opts
,
1541 struct gcc_options
*opts_set
,
1542 const struct cl_decoded_option
*decoded
,
1543 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1545 const struct cl_option_handlers
*handlers
,
1546 diagnostic_context
*dc
)
1548 size_t scode
= decoded
->opt_index
;
1549 const char *arg
= decoded
->arg
;
1550 int value
= decoded
->value
;
1551 enum opt_code code
= (enum opt_code
) scode
;
1553 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1558 handle_param (opts
, opts_set
, loc
, arg
);
1563 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1564 unsigned int undoc_mask
;
1567 if (lang_mask
== CL_DRIVER
)
1570 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1573 /* First display any single language specific options. */
1574 for (i
= 0; i
< cl_lang_count
; i
++)
1576 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1578 /* Next display any multi language specific options. */
1579 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1580 /* Then display any remaining, non-language options. */
1581 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1583 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1584 opts
->x_exit_after_options
= true;
1588 case OPT__target_help
:
1589 if (lang_mask
== CL_DRIVER
)
1592 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1593 opts
->x_exit_after_options
= true;
1598 const char * a
= arg
;
1599 unsigned int include_flags
= 0;
1600 /* Note - by default we include undocumented options when listing
1601 specific classes. If you only want to see documented options
1602 then add ",^undocumented" to the --help= option. E.g.:
1604 --help=target,^undocumented */
1605 unsigned int exclude_flags
= 0;
1607 if (lang_mask
== CL_DRIVER
)
1610 /* Walk along the argument string, parsing each word in turn.
1612 arg = [^]{word}[,{arg}]
1613 word = {optimizers|target|warnings|undocumented|
1614 params|common|<language>} */
1619 const char * string
;
1624 { "optimizers", CL_OPTIMIZATION
},
1625 { "target", CL_TARGET
},
1626 { "warnings", CL_WARNING
},
1627 { "undocumented", CL_UNDOCUMENTED
},
1628 { "params", CL_PARAMS
},
1629 { "joined", CL_JOINED
},
1630 { "separate", CL_SEPARATE
},
1631 { "common", CL_COMMON
},
1634 unsigned int * pflags
;
1636 unsigned int lang_flag
, specific_flag
;
1643 pflags
= & exclude_flags
;
1646 pflags
= & include_flags
;
1648 comma
= strchr (a
, ',');
1659 /* Check to see if the string matches an option class name. */
1660 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1661 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1663 specific_flag
= specifics
[i
].flag
;
1667 /* Check to see if the string matches a language name.
1668 Note - we rely upon the alpha-sorted nature of the entries in
1669 the lang_names array, specifically that shorter names appear
1670 before their longer variants. (i.e. C before C++). That way
1671 when we are attempting to match --help=c for example we will
1672 match with C first and not C++. */
1673 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1674 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1676 lang_flag
= 1U << i
;
1680 if (specific_flag
!= 0)
1683 * pflags
|= specific_flag
;
1686 /* The option's argument matches both the start of a
1687 language name and the start of an option class name.
1688 We have a special case for when the user has
1689 specified "--help=c", but otherwise we have to issue
1691 if (strncasecmp (a
, "c", len
) == 0)
1692 * pflags
|= lang_flag
;
1695 "--help argument %q.*s is ambiguous, "
1696 "please be more specific",
1700 else if (lang_flag
!= 0)
1701 * pflags
|= lang_flag
;
1704 "unrecognized argument to --help= option: %q.*s",
1713 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1715 opts
->x_exit_after_options
= true;
1720 if (lang_mask
== CL_DRIVER
)
1723 opts
->x_exit_after_options
= true;
1726 case OPT_fsanitize_
:
1727 opts
->x_flag_sanitize
1728 = parse_sanitizer_options (arg
, loc
, code
,
1729 opts
->x_flag_sanitize
, value
, true);
1731 /* Kernel ASan implies normal ASan but does not yet support
1733 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1735 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1736 0, opts
->x_param_values
,
1737 opts_set
->x_param_values
);
1738 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1739 opts_set
->x_param_values
);
1740 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1741 opts_set
->x_param_values
);
1742 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1743 opts
->x_param_values
,
1744 opts_set
->x_param_values
);
1748 case OPT_fsanitize_recover_
:
1749 opts
->x_flag_sanitize_recover
1750 = parse_sanitizer_options (arg
, loc
, code
,
1751 opts
->x_flag_sanitize_recover
, value
, true);
1754 case OPT_fasan_shadow_offset_
:
1758 case OPT_fsanitize_recover
:
1760 opts
->x_flag_sanitize_recover
1761 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1763 opts
->x_flag_sanitize_recover
1764 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1771 /* Currently handled in a prescan. */
1775 dc
->warning_as_error_requested
= value
;
1779 if (lang_mask
== CL_DRIVER
)
1782 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1783 opts
, opts_set
, loc
, dc
);
1786 case OPT_Wlarger_than_
:
1787 opts
->x_larger_than_size
= value
;
1788 opts
->x_warn_larger_than
= value
!= -1;
1791 case OPT_Wfatal_errors
:
1792 dc
->fatal_errors
= value
;
1795 case OPT_Wframe_larger_than_
:
1796 opts
->x_frame_larger_than_size
= value
;
1797 opts
->x_warn_frame_larger_than
= value
!= -1;
1800 case OPT_Wstack_usage_
:
1801 opts
->x_warn_stack_usage
= value
;
1802 opts
->x_flag_stack_usage_info
= value
!= -1;
1805 case OPT_Wstrict_aliasing
:
1806 set_Wstrict_aliasing (opts
, value
);
1809 case OPT_Wstrict_overflow
:
1810 opts
->x_warn_strict_overflow
= (value
1811 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1815 case OPT_Wsystem_headers
:
1816 dc
->dc_warn_system_headers
= value
;
1820 opts
->x_flag_gen_aux_info
= 1;
1823 case OPT_auxbase_strip
:
1825 char *tmp
= xstrdup (arg
);
1826 strip_off_ending (tmp
, strlen (tmp
));
1828 opts
->x_aux_base_name
= tmp
;
1835 decode_d_option (arg
, opts
, loc
, dc
);
1838 case OPT_fcall_used_
:
1839 case OPT_fcall_saved_
:
1847 case OPT_fdbg_cnt_list
:
1849 opts
->x_exit_after_options
= true;
1852 case OPT_fdebug_prefix_map_
:
1856 case OPT_fdiagnostics_show_location_
:
1857 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1860 case OPT_fdiagnostics_show_caret
:
1861 dc
->show_caret
= value
;
1864 case OPT_fdiagnostics_color_
:
1865 diagnostic_color_init (dc
, value
);
1868 case OPT_fdiagnostics_show_option
:
1869 dc
->show_option_requested
= value
;
1876 case OPT_ffast_math
:
1877 set_fast_math_flags (opts
, value
);
1880 case OPT_funsafe_math_optimizations
:
1881 set_unsafe_math_optimizations_flags (opts
, value
);
1888 case OPT_finline_limit_
:
1889 set_param_value ("max-inline-insns-single", value
/ 2,
1890 opts
->x_param_values
, opts_set
->x_param_values
);
1891 set_param_value ("max-inline-insns-auto", value
/ 2,
1892 opts
->x_param_values
, opts_set
->x_param_values
);
1895 case OPT_finstrument_functions_exclude_function_list_
:
1896 add_comma_separated_to_vector
1897 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1900 case OPT_finstrument_functions_exclude_file_list_
:
1901 add_comma_separated_to_vector
1902 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1905 case OPT_fmessage_length_
:
1906 pp_set_line_maximum_length (dc
->printer
, value
);
1907 diagnostic_set_caret_max_width (dc
, value
);
1911 case OPT_fopt_info_
:
1917 const char *p
= arg
;
1918 opts
->x_flag_disable_hsa
= true;
1921 const char *comma
= strchr (p
, ',');
1923 if ((strncmp (p
, "disable", 7) == 0)
1924 && (p
[7] == ',' || p
[7] == '\0'))
1926 opts
->x_flag_disable_hsa
= true;
1930 if ((strncmp (p
, "hsa", 3) == 0)
1931 && (p
[3] == ',' || p
[3] == '\0'))
1934 opts
->x_flag_disable_hsa
= false;
1936 sorry ("HSA has not been enabled during configuration");
1946 #ifndef ACCEL_COMPILER
1947 case OPT_foffload_abi_
:
1948 error_at (loc
, "-foffload-abi option can be specified only for "
1949 "offload compiler");
1953 case OPT_fpack_struct_
:
1954 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1956 "structure alignment must be a small power of two, not %d",
1959 opts
->x_initial_max_fld_align
= value
;
1963 case OPT_fplugin_arg_
:
1967 case OPT_fprofile_use_
:
1968 opts
->x_profile_data_prefix
= xstrdup (arg
);
1969 opts
->x_flag_profile_use
= true;
1971 /* No break here - do -fprofile-use processing. */
1972 case OPT_fprofile_use
:
1973 enable_fdo_optimizations (opts
, opts_set
, value
);
1974 if (!opts_set
->x_flag_profile_reorder_functions
)
1975 opts
->x_flag_profile_reorder_functions
= value
;
1976 /* Indirect call profiling should do all useful transformations
1977 speculative devirtualization does. */
1978 if (!opts_set
->x_flag_devirtualize_speculatively
1979 && opts
->x_flag_value_profile_transformations
)
1980 opts
->x_flag_devirtualize_speculatively
= false;
1983 case OPT_fauto_profile_
:
1984 opts
->x_auto_profile_file
= xstrdup (arg
);
1985 opts
->x_flag_auto_profile
= true;
1987 /* No break here - do -fauto-profile processing. */
1988 case OPT_fauto_profile
:
1989 enable_fdo_optimizations (opts
, opts_set
, value
);
1990 if (!opts_set
->x_flag_profile_correction
)
1991 opts
->x_flag_profile_correction
= value
;
1992 maybe_set_param_value (
1993 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1994 opts
->x_param_values
, opts_set
->x_param_values
);
1997 case OPT_fprofile_generate_
:
1998 opts
->x_profile_data_prefix
= xstrdup (arg
);
2000 /* No break here - do -fprofile-generate processing. */
2001 case OPT_fprofile_generate
:
2002 if (!opts_set
->x_profile_arc_flag
)
2003 opts
->x_profile_arc_flag
= value
;
2004 if (!opts_set
->x_flag_profile_values
)
2005 opts
->x_flag_profile_values
= value
;
2006 if (!opts_set
->x_flag_inline_functions
)
2007 opts
->x_flag_inline_functions
= value
;
2008 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2009 quadratic. Disable the pass until better memory representation
2011 if (!opts_set
->x_flag_ipa_reference
)
2012 opts
->x_flag_ipa_reference
= false;
2015 case OPT_ftree_vectorize
:
2016 if (!opts_set
->x_flag_tree_loop_vectorize
)
2017 opts
->x_flag_tree_loop_vectorize
= value
;
2018 if (!opts_set
->x_flag_tree_slp_vectorize
)
2019 opts
->x_flag_tree_slp_vectorize
= value
;
2021 case OPT_fshow_column
:
2022 dc
->show_column
= value
;
2025 case OPT_frandom_seed
:
2026 /* The real switch is -fno-random-seed. */
2032 case OPT_frandom_seed_
:
2036 case OPT_fsched_verbose_
:
2037 #ifdef INSN_SCHEDULING
2038 /* Handled with Var in common.opt. */
2044 case OPT_fsched_stalled_insns_
:
2045 opts
->x_flag_sched_stalled_insns
= value
;
2046 if (opts
->x_flag_sched_stalled_insns
== 0)
2047 opts
->x_flag_sched_stalled_insns
= -1;
2050 case OPT_fsched_stalled_insns_dep_
:
2051 opts
->x_flag_sched_stalled_insns_dep
= value
;
2054 case OPT_fstack_check_
:
2055 if (!strcmp (arg
, "no"))
2056 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2057 else if (!strcmp (arg
, "generic"))
2058 /* This is the old stack checking method. */
2059 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2060 ? FULL_BUILTIN_STACK_CHECK
2061 : GENERIC_STACK_CHECK
;
2062 else if (!strcmp (arg
, "specific"))
2063 /* This is the new stack checking method. */
2064 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2065 ? FULL_BUILTIN_STACK_CHECK
2066 : STACK_CHECK_STATIC_BUILTIN
2067 ? STATIC_BUILTIN_STACK_CHECK
2068 : GENERIC_STACK_CHECK
;
2070 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2073 case OPT_fstack_limit
:
2074 /* The real switch is -fno-stack-limit. */
2080 case OPT_fstack_limit_register_
:
2081 case OPT_fstack_limit_symbol_
:
2085 case OPT_fstack_usage
:
2086 opts
->x_flag_stack_usage
= value
;
2087 opts
->x_flag_stack_usage_info
= value
!= 0;
2091 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2096 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2100 if (arg
&& strlen (arg
) != 0)
2102 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2103 "use %<-gdwarf-%s%> for DWARF version "
2104 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2108 value
= opts
->x_dwarf_version
;
2112 if (value
< 2 || value
> 5)
2113 error_at (loc
, "dwarf version %d is not supported", value
);
2115 opts
->x_dwarf_version
= value
;
2116 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2119 case OPT_gsplit_dwarf
:
2120 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2125 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2130 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2135 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2140 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2146 /* Handled completely via specs. */
2149 case OPT_pedantic_errors
:
2150 dc
->pedantic_errors
= 1;
2151 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2153 handlers
, opts
, opts_set
,
2158 opts
->x_flag_lto
= value
? "" : NULL
;
2162 dc
->dc_inhibit_warnings
= true;
2165 case OPT_fmax_errors_
:
2166 dc
->max_errors
= value
;
2169 case OPT_fuse_ld_bfd
:
2170 case OPT_fuse_ld_gold
:
2171 case OPT_fuse_linker_plugin
:
2172 /* No-op. Used by the driver and passed to us because it starts with f.*/
2177 opts
->x_flag_trapv
= 0;
2182 opts
->x_flag_wrapv
= 0;
2186 opts
->x_flag_ipa_icf_functions
= value
;
2187 opts
->x_flag_ipa_icf_variables
= value
;
2191 /* If the flag was handled in a standard way, assume the lack of
2192 processing here is intentional. */
2193 gcc_assert (option_flag_var (scode
, opts
));
2197 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2202 /* Handle --param NAME=VALUE. */
2204 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2205 location_t loc
, const char *carg
)
2210 arg
= xstrdup (carg
);
2211 equal
= strchr (arg
, '=');
2213 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2219 enum compiler_param index
;
2220 if (!find_param (arg
, &index
))
2221 error_at (loc
, "invalid --param name %qs", arg
);
2224 if (!param_string_value_p (index
, equal
+ 1, &value
))
2225 value
= integral_argument (equal
+ 1);
2228 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2230 set_param_value (arg
, value
,
2231 opts
->x_param_values
, opts_set
->x_param_values
);
2238 /* Used to set the level of strict aliasing warnings in OPTS,
2239 when no level is specified (i.e., when -Wstrict-aliasing, and not
2240 -Wstrict-aliasing=level was given).
2241 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2242 and 0 otherwise. After calling this function, wstrict_aliasing will be
2243 set to the default value of -Wstrict_aliasing=level, currently 3. */
2245 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2247 gcc_assert (onoff
== 0 || onoff
== 1);
2249 opts
->x_warn_strict_aliasing
= 3;
2251 opts
->x_warn_strict_aliasing
= 0;
2254 /* The following routines are useful in setting all the flags that
2255 -ffast-math and -fno-fast-math imply. */
2257 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2259 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2261 opts
->x_flag_unsafe_math_optimizations
= set
;
2262 set_unsafe_math_optimizations_flags (opts
, set
);
2264 if (!opts
->frontend_set_flag_finite_math_only
)
2265 opts
->x_flag_finite_math_only
= set
;
2266 if (!opts
->frontend_set_flag_errno_math
)
2267 opts
->x_flag_errno_math
= !set
;
2270 if (!opts
->frontend_set_flag_signaling_nans
)
2271 opts
->x_flag_signaling_nans
= 0;
2272 if (!opts
->frontend_set_flag_rounding_math
)
2273 opts
->x_flag_rounding_math
= 0;
2274 if (!opts
->frontend_set_flag_cx_limited_range
)
2275 opts
->x_flag_cx_limited_range
= 1;
2279 /* When -funsafe-math-optimizations is set the following
2280 flags are set as well. */
2282 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2284 if (!opts
->frontend_set_flag_trapping_math
)
2285 opts
->x_flag_trapping_math
= !set
;
2286 if (!opts
->frontend_set_flag_signed_zeros
)
2287 opts
->x_flag_signed_zeros
= !set
;
2288 if (!opts
->frontend_set_flag_associative_math
)
2289 opts
->x_flag_associative_math
= set
;
2290 if (!opts
->frontend_set_flag_reciprocal_math
)
2291 opts
->x_flag_reciprocal_math
= set
;
2294 /* Return true iff flags in OPTS are set as if -ffast-math. */
2296 fast_math_flags_set_p (const struct gcc_options
*opts
)
2298 return (!opts
->x_flag_trapping_math
2299 && opts
->x_flag_unsafe_math_optimizations
2300 && opts
->x_flag_finite_math_only
2301 && !opts
->x_flag_signed_zeros
2302 && !opts
->x_flag_errno_math
);
2305 /* Return true iff flags are set as if -ffast-math but using the flags stored
2306 in the struct cl_optimization structure. */
2308 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2310 return (!opt
->x_flag_trapping_math
2311 && opt
->x_flag_unsafe_math_optimizations
2312 && opt
->x_flag_finite_math_only
2313 && !opt
->x_flag_signed_zeros
2314 && !opt
->x_flag_errno_math
);
2317 /* Handle a debug output -g switch for options OPTS
2318 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2319 explicitly), location LOC. EXTENDED is true or false to support
2320 extended output (2 is special and means "-ggdb" was given). */
2322 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2323 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2326 opts
->x_use_gnu_debug_info_extensions
= extended
;
2328 if (type
== NO_DEBUG
)
2330 if (opts
->x_write_symbols
== NO_DEBUG
)
2332 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2336 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2337 opts
->x_write_symbols
= DWARF2_DEBUG
;
2338 #elif defined DBX_DEBUGGING_INFO
2339 opts
->x_write_symbols
= DBX_DEBUG
;
2343 if (opts
->x_write_symbols
== NO_DEBUG
)
2344 warning_at (loc
, 0, "target system does not support debug output");
2349 /* Does it conflict with an already selected type? */
2350 if (opts_set
->x_write_symbols
!= NO_DEBUG
2351 && opts
->x_write_symbols
!= NO_DEBUG
2352 && type
!= opts
->x_write_symbols
)
2353 error_at (loc
, "debug format %qs conflicts with prior selection",
2354 debug_type_names
[type
]);
2355 opts
->x_write_symbols
= type
;
2356 opts_set
->x_write_symbols
= type
;
2359 /* A debug flag without a level defaults to level 2.
2360 If off or at level 1, set it to level 2, but if already
2361 at level 3, don't lower it. */
2364 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2365 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2369 int argval
= integral_argument (arg
);
2371 error_at (loc
, "unrecognised debug output level %qs", arg
);
2372 else if (argval
> 3)
2373 error_at (loc
, "debug output level %qs is too high", arg
);
2375 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2379 /* Arrange to dump core on error for diagnostic context DC. (The
2380 regular error message is still printed first, except in the case of
2384 setup_core_dumping (diagnostic_context
*dc
)
2387 signal (SIGABRT
, SIG_DFL
);
2389 #if defined(HAVE_SETRLIMIT)
2392 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2393 fatal_error (input_location
, "getting core file size maximum limit: %m");
2394 rlim
.rlim_cur
= rlim
.rlim_max
;
2395 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2396 fatal_error (input_location
,
2397 "setting core file size limit to maximum: %m");
2400 diagnostic_abort_on_error (dc
);
2403 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2404 diagnostic context DC. */
2407 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2408 location_t loc
, diagnostic_context
*dc
)
2416 opts
->x_flag_debug_asm
= 1;
2419 opts
->x_flag_print_asm_name
= 1;
2422 opts
->x_flag_dump_rtl_in_asm
= 1;
2423 opts
->x_flag_print_asm_name
= 1;
2426 opts
->x_rtl_dump_and_exit
= 1;
2428 case 'D': /* These are handled by the preprocessor. */
2435 setup_core_dumping (dc
);
2438 opts
->x_flag_dump_all_passed
= true;
2442 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2447 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2448 mask LANG_MASK, option handlers HANDLERS) as an error for option
2449 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2450 NULL), location LOC. This is used by -Werror=. */
2453 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2454 const struct cl_option_handlers
*handlers
,
2455 struct gcc_options
*opts
,
2456 struct gcc_options
*opts_set
,
2457 location_t loc
, diagnostic_context
*dc
)
2462 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2463 new_option
[0] = 'W';
2464 strcpy (new_option
+ 1, arg
);
2465 option_index
= find_opt (new_option
, lang_mask
);
2466 if (option_index
== OPT_SPECIAL_unknown
)
2467 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2468 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2469 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2473 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2474 const char *arg
= NULL
;
2476 if (cl_options
[option_index
].flags
& CL_JOINED
)
2477 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2478 control_warning_option (option_index
, (int) kind
, arg
, value
,
2480 handlers
, opts
, opts_set
, dc
);
2485 /* Return malloced memory for the name of the option OPTION_INDEX
2486 which enabled a diagnostic (context CONTEXT), originally of type
2487 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2491 option_name (diagnostic_context
*context
, int option_index
,
2492 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2496 /* A warning classified as an error. */
2497 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2498 && diag_kind
== DK_ERROR
)
2499 return concat (cl_options
[OPT_Werror_
].opt_text
,
2500 /* Skip over "-W". */
2501 cl_options
[option_index
].opt_text
+ 2,
2503 /* A warning with option. */
2505 return xstrdup (cl_options
[option_index
].opt_text
);
2507 /* A warning without option classified as an error. */
2508 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2509 || diag_kind
== DK_WARNING
)
2510 && context
->warning_as_error_requested
)
2511 return xstrdup (cl_options
[OPT_Werror
].opt_text
);