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 /* We initialize opts->x_flag_pic to -1 so that we can tell if
770 -fpic, -fPIC, -fno-pic or -fno-PIC is used. */
771 if (opts
->x_flag_pic
== -1)
772 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
774 opts
->x_flag_pie
= 0;
776 /* If -fPIE or -fpie is used, turn on PIC. */
777 if (opts
->x_flag_pie
)
778 opts
->x_flag_pic
= opts
->x_flag_pie
;
779 else if (opts
->x_flag_pic
== -1)
780 opts
->x_flag_pic
= 0;
781 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
782 opts
->x_flag_shlib
= 1;
783 opts
->x_flag_opts_finished
= true;
786 /* We initialize opts->x_flag_stack_protect to -1 so that targets
787 can set a default value. */
788 if (opts
->x_flag_stack_protect
== -1)
789 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
791 if (opts
->x_optimize
== 0)
793 /* Inlining does not work if not optimizing,
794 so force it not to be done. */
795 opts
->x_warn_inline
= 0;
796 opts
->x_flag_no_inline
= 1;
799 /* The optimization to partition hot and cold basic blocks into separate
800 sections of the .o and executable files does not work (currently)
801 with exception handling. This is because there is no support for
802 generating unwind info. If opts->x_flag_exceptions is turned on
803 we need to turn off the partitioning optimization. */
805 ui_except
= targetm_common
.except_unwind_info (opts
);
807 if (opts
->x_flag_exceptions
808 && opts
->x_flag_reorder_blocks_and_partition
809 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
811 if (opts_set
->x_flag_reorder_blocks_and_partition
)
813 "-freorder-blocks-and-partition does not work "
814 "with exceptions on this architecture");
815 opts
->x_flag_reorder_blocks_and_partition
= 0;
816 opts
->x_flag_reorder_blocks
= 1;
819 /* If user requested unwind info, then turn off the partitioning
822 if (opts
->x_flag_unwind_tables
823 && !targetm_common
.unwind_tables_default
824 && opts
->x_flag_reorder_blocks_and_partition
825 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
827 if (opts_set
->x_flag_reorder_blocks_and_partition
)
829 "-freorder-blocks-and-partition does not support "
830 "unwind info on this architecture");
831 opts
->x_flag_reorder_blocks_and_partition
= 0;
832 opts
->x_flag_reorder_blocks
= 1;
835 /* If the target requested unwind info, then turn off the partitioning
836 optimization with a different message. Likewise, if the target does not
837 support named sections. */
839 if (opts
->x_flag_reorder_blocks_and_partition
840 && (!targetm_common
.have_named_sections
841 || (opts
->x_flag_unwind_tables
842 && targetm_common
.unwind_tables_default
843 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
845 if (opts_set
->x_flag_reorder_blocks_and_partition
)
847 "-freorder-blocks-and-partition does not work "
848 "on this architecture");
849 opts
->x_flag_reorder_blocks_and_partition
= 0;
850 opts
->x_flag_reorder_blocks
= 1;
853 /* Disable -freorder-blocks-and-partition when -fprofile-use is not in
854 effect. Function splitting was not actually being performed in that case,
855 as probably_never_executed_bb_p does not distinguish any basic blocks as
856 being cold vs hot when there is no profile data. Leaving it enabled,
857 however, causes the assembly code generator to create (empty) cold
858 sections and labels, leading to unnecessary size overhead. */
859 if (opts
->x_flag_reorder_blocks_and_partition
860 && !opts_set
->x_flag_profile_use
)
861 opts
->x_flag_reorder_blocks_and_partition
= 0;
863 if (opts
->x_flag_reorder_blocks_and_partition
864 && !opts_set
->x_flag_reorder_functions
)
865 opts
->x_flag_reorder_functions
= 1;
867 /* Pipelining of outer loops is only possible when general pipelining
868 capabilities are requested. */
869 if (!opts
->x_flag_sel_sched_pipelining
)
870 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
872 if (opts
->x_flag_conserve_stack
)
874 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
875 opts
->x_param_values
, opts_set
->x_param_values
);
876 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
877 opts
->x_param_values
, opts_set
->x_param_values
);
880 if (opts
->x_flag_lto
)
883 opts
->x_flag_generate_lto
= 1;
885 /* When generating IL, do not operate in whole-program mode.
886 Otherwise, symbols will be privatized too early, causing link
888 opts
->x_flag_whole_program
= 0;
890 error_at (loc
, "LTO support has not been enabled in this configuration");
892 if (!opts
->x_flag_fat_lto_objects
894 || (opts_set
->x_flag_use_linker_plugin
895 && !opts
->x_flag_use_linker_plugin
)))
897 if (opts_set
->x_flag_fat_lto_objects
)
898 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
899 opts
->x_flag_fat_lto_objects
= 1;
903 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
904 default value if they choose based on other options. */
905 if (opts
->x_flag_split_stack
== -1)
906 opts
->x_flag_split_stack
= 0;
907 else if (opts
->x_flag_split_stack
)
909 if (!targetm_common
.supports_split_stack (true, opts
))
911 error_at (loc
, "%<-fsplit-stack%> is not supported by "
912 "this compiler configuration");
913 opts
->x_flag_split_stack
= 0;
917 /* Tune vectorization related parametees according to cost model. */
918 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
920 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
921 6, opts
->x_param_values
, opts_set
->x_param_values
);
922 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
923 0, opts
->x_param_values
, opts_set
->x_param_values
);
924 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
925 0, opts
->x_param_values
, opts_set
->x_param_values
);
928 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
930 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
931 || !opts
->x_flag_tree_loop_if_convert
)
932 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
933 opts
->x_param_values
, opts_set
->x_param_values
);
935 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
936 if (opts
->x_dwarf_split_debug_info
)
937 opts
->x_debug_generate_pub_sections
= 2;
939 /* Userspace and kernel ASan conflict with each other. */
941 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
942 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
944 "-fsanitize=address is incompatible with "
945 "-fsanitize=kernel-address");
949 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
950 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
952 "-fsanitize=address and -fsanitize=kernel-address "
953 "are incompatible with -fsanitize=thread");
955 /* Error recovery is not allowed for LSan and TSan. */
957 if (opts
->x_flag_sanitize_recover
& SANITIZE_THREAD
)
958 error_at (loc
, "-fsanitize-recover=thread is not supported");
960 if (opts
->x_flag_sanitize_recover
& SANITIZE_LEAK
)
961 error_at (loc
, "-fsanitize-recover=leak is not supported");
963 /* When instrumenting the pointers, we don't want to remove
964 the null pointer checks. */
965 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
966 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
967 opts
->x_flag_delete_null_pointer_checks
= 0;
969 /* Aggressive compiler optimizations may cause false negatives. */
970 if (opts
->x_flag_sanitize
)
972 opts
->x_flag_aggressive_loop_optimizations
= 0;
973 opts
->x_flag_strict_overflow
= 0;
977 #define LEFT_COLUMN 27
979 /* Output ITEM, of length ITEM_WIDTH, in the left column,
980 followed by word-wrapped HELP in a second column. */
982 wrap_help (const char *help
,
984 unsigned int item_width
,
985 unsigned int columns
)
987 unsigned int col_width
= LEFT_COLUMN
;
988 unsigned int remaining
, room
, len
;
990 remaining
= strlen (help
);
994 room
= columns
- 3 - MAX (col_width
, item_width
);
1003 for (i
= 0; help
[i
]; i
++)
1005 if (i
>= room
&& len
!= remaining
)
1009 else if ((help
[i
] == '-' || help
[i
] == '/')
1010 && help
[i
+ 1] != ' '
1011 && i
> 0 && ISALPHA (help
[i
- 1]))
1016 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1018 while (help
[len
] == ' ')
1026 /* Print help for a specific front-end, etc. */
1028 print_filtered_help (unsigned int include_flags
,
1029 unsigned int exclude_flags
,
1030 unsigned int any_flags
,
1031 unsigned int columns
,
1032 struct gcc_options
*opts
,
1033 unsigned int lang_mask
)
1038 bool displayed
= false;
1041 if (include_flags
== CL_PARAMS
)
1043 for (i
= 0; i
< LAST_PARAM
; i
++)
1045 const char *param
= compiler_params
[i
].option
;
1047 help
= compiler_params
[i
].help
;
1048 if (help
== NULL
|| *help
== '\0')
1050 if (exclude_flags
& CL_UNDOCUMENTED
)
1052 help
= undocumented_msg
;
1055 /* Get the translation. */
1058 if (!opts
->x_quiet_flag
)
1060 snprintf (new_help
, sizeof (new_help
),
1061 _("default %d minimum %d maximum %d"),
1062 compiler_params
[i
].default_value
,
1063 compiler_params
[i
].min_value
,
1064 compiler_params
[i
].max_value
);
1067 wrap_help (help
, param
, strlen (param
), columns
);
1073 if (!opts
->x_help_printed
)
1074 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1076 if (!opts
->x_help_enum_printed
)
1077 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1079 for (i
= 0; i
< cl_options_count
; i
++)
1081 const struct cl_option
*option
= cl_options
+ i
;
1086 if (include_flags
== 0
1087 || ((option
->flags
& include_flags
) != include_flags
))
1089 if ((option
->flags
& any_flags
) == 0)
1093 /* Skip unwanted switches. */
1094 if ((option
->flags
& exclude_flags
) != 0)
1097 /* The driver currently prints its own help text. */
1098 if ((option
->flags
& CL_DRIVER
) != 0
1099 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1100 | CL_COMMON
| CL_TARGET
)) == 0)
1104 /* Skip switches that have already been printed. */
1105 if (opts
->x_help_printed
[i
])
1108 opts
->x_help_printed
[i
] = true;
1110 help
= option
->help
;
1113 if (exclude_flags
& CL_UNDOCUMENTED
)
1116 help
= undocumented_msg
;
1119 if (option
->alias_target
< N_OPTS
1120 && cl_options
[option
->alias_target
].help
)
1122 if (help
== undocumented_msg
)
1124 /* For undocumented options that are aliases for other options
1125 that are documented, point the reader to the other option in
1126 preference of the former. */
1127 snprintf (new_help
, sizeof new_help
,
1128 _("Same as %s. Use the latter option instead."),
1129 cl_options
[option
->alias_target
].opt_text
);
1133 /* For documented options with aliases, mention the aliased
1134 option's name for reference. */
1135 snprintf (new_help
, sizeof new_help
,
1136 _("%s Same as %s."),
1137 help
, cl_options
[option
->alias_target
].opt_text
);
1143 if (option
->warn_message
)
1145 /* Mention that the use of the option will trigger a warning. */
1146 if (help
== new_help
)
1147 snprintf (new_help
+ strlen (new_help
),
1148 sizeof new_help
- strlen (new_help
),
1149 " %s", _(use_diagnosed_msg
));
1151 snprintf (new_help
, sizeof new_help
,
1152 "%s %s", help
, _(use_diagnosed_msg
));
1157 /* Get the translation. */
1160 /* Find the gap between the name of the
1161 option and its descriptive text. */
1162 tab
= strchr (help
, '\t');
1171 opt
= option
->opt_text
;
1175 /* With the -Q option enabled we change the descriptive text associated
1176 with an option to be an indication of its current setting. */
1177 if (!opts
->x_quiet_flag
)
1179 void *flag_var
= option_flag_var (i
, opts
);
1181 if (len
< (LEFT_COLUMN
+ 2))
1182 strcpy (new_help
, "\t\t");
1184 strcpy (new_help
, "\t");
1186 if (flag_var
!= NULL
1187 && option
->var_type
!= CLVC_DEFER
)
1189 if (option
->flags
& CL_JOINED
)
1191 if (option
->var_type
== CLVC_STRING
)
1193 if (* (const char **) flag_var
!= NULL
)
1194 snprintf (new_help
+ strlen (new_help
),
1195 sizeof (new_help
) - strlen (new_help
),
1196 "%s", * (const char **) flag_var
);
1198 else if (option
->var_type
== CLVC_ENUM
)
1200 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1202 const char *arg
= NULL
;
1204 value
= e
->get (flag_var
);
1205 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1207 arg
= _("[default]");
1208 snprintf (new_help
+ strlen (new_help
),
1209 sizeof (new_help
) - strlen (new_help
),
1213 sprintf (new_help
+ strlen (new_help
),
1214 "%#x", * (int *) flag_var
);
1217 strcat (new_help
, option_enabled (i
, opts
)
1218 ? _("[enabled]") : _("[disabled]"));
1224 wrap_help (help
, opt
, len
, columns
);
1227 if (option
->var_type
== CLVC_ENUM
1228 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1229 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1234 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1237 printf (_(" No options with the desired characteristics were found\n"));
1242 /* PR 31349: Tell the user how to see all of the
1243 options supported by a specific front end. */
1244 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1245 if ((1U << i
) & langs
)
1246 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1247 lang_names
[i
], lang_names
[i
]);
1251 else if (! displayed
)
1252 printf (_(" All options with the desired characteristics have already been displayed\n"));
1256 /* Print details of enumerated option arguments, if those
1257 enumerations have help text headings provided. If no help text
1258 is provided, presume that the possible values are listed in the
1259 help text for the relevant options. */
1260 for (i
= 0; i
< cl_enums_count
; i
++)
1262 unsigned int j
, pos
;
1264 if (opts
->x_help_enum_printed
[i
] != 1)
1266 if (cl_enums
[i
].help
== NULL
)
1268 printf (" %s\n ", _(cl_enums
[i
].help
));
1270 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1272 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1274 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1276 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1286 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1291 opts
->x_help_enum_printed
[i
] = 2;
1295 /* Display help for a specified type of option.
1296 The options must have ALL of the INCLUDE_FLAGS set
1297 ANY of the flags in the ANY_FLAGS set
1298 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1299 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1301 print_specific_help (unsigned int include_flags
,
1302 unsigned int exclude_flags
,
1303 unsigned int any_flags
,
1304 struct gcc_options
*opts
,
1305 unsigned int lang_mask
)
1307 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1308 const char * description
= NULL
;
1309 const char * descrip_extra
= "";
1313 /* Sanity check: Make sure that we do not have more
1314 languages than we have bits available to enumerate them. */
1315 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1317 /* If we have not done so already, obtain
1318 the desired maximum width of the output. */
1319 if (opts
->x_help_columns
== 0)
1321 opts
->x_help_columns
= get_terminal_width ();
1322 if (opts
->x_help_columns
== INT_MAX
)
1323 /* Use a reasonable default. */
1324 opts
->x_help_columns
= 80;
1327 /* Decide upon the title for the options that we are going to display. */
1328 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1330 switch (flag
& include_flags
)
1337 description
= _("The following options are target specific");
1340 description
= _("The following options control compiler warning messages");
1342 case CL_OPTIMIZATION
:
1343 description
= _("The following options control optimizations");
1346 description
= _("The following options are language-independent");
1349 description
= _("The --param option recognizes the following as parameters");
1352 if (i
>= cl_lang_count
)
1354 if (exclude_flags
& all_langs_mask
)
1355 description
= _("The following options are specific to just the language ");
1357 description
= _("The following options are supported by the language ");
1358 descrip_extra
= lang_names
[i
];
1363 if (description
== NULL
)
1367 if (include_flags
& CL_UNDOCUMENTED
)
1368 description
= _("The following options are not documented");
1369 else if (include_flags
& CL_SEPARATE
)
1370 description
= _("The following options take separate arguments");
1371 else if (include_flags
& CL_JOINED
)
1372 description
= _("The following options take joined arguments");
1375 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1382 if (any_flags
& all_langs_mask
)
1383 description
= _("The following options are language-related");
1385 description
= _("The following options are language-independent");
1389 printf ("%s%s:\n", description
, descrip_extra
);
1390 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1391 opts
->x_help_columns
, opts
, lang_mask
);
1394 /* Enable FDO-related flags. */
1397 enable_fdo_optimizations (struct gcc_options
*opts
,
1398 struct gcc_options
*opts_set
,
1401 if (!opts_set
->x_flag_branch_probabilities
)
1402 opts
->x_flag_branch_probabilities
= value
;
1403 if (!opts_set
->x_flag_profile_values
)
1404 opts
->x_flag_profile_values
= value
;
1405 if (!opts_set
->x_flag_unroll_loops
)
1406 opts
->x_flag_unroll_loops
= value
;
1407 if (!opts_set
->x_flag_peel_loops
)
1408 opts
->x_flag_peel_loops
= value
;
1409 if (!opts_set
->x_flag_tracer
)
1410 opts
->x_flag_tracer
= value
;
1411 if (!opts_set
->x_flag_value_profile_transformations
)
1412 opts
->x_flag_value_profile_transformations
= value
;
1413 if (!opts_set
->x_flag_inline_functions
)
1414 opts
->x_flag_inline_functions
= value
;
1415 if (!opts_set
->x_flag_ipa_cp
)
1416 opts
->x_flag_ipa_cp
= value
;
1417 if (!opts_set
->x_flag_ipa_cp_clone
1418 && value
&& opts
->x_flag_ipa_cp
)
1419 opts
->x_flag_ipa_cp_clone
= value
;
1420 if (!opts_set
->x_flag_ipa_cp_alignment
1421 && value
&& opts
->x_flag_ipa_cp
)
1422 opts
->x_flag_ipa_cp_alignment
= value
;
1423 if (!opts_set
->x_flag_predictive_commoning
)
1424 opts
->x_flag_predictive_commoning
= value
;
1425 if (!opts_set
->x_flag_unswitch_loops
)
1426 opts
->x_flag_unswitch_loops
= value
;
1427 if (!opts_set
->x_flag_gcse_after_reload
)
1428 opts
->x_flag_gcse_after_reload
= value
;
1429 if (!opts_set
->x_flag_tree_loop_vectorize
1430 && !opts_set
->x_flag_tree_vectorize
)
1431 opts
->x_flag_tree_loop_vectorize
= value
;
1432 if (!opts_set
->x_flag_tree_slp_vectorize
1433 && !opts_set
->x_flag_tree_vectorize
)
1434 opts
->x_flag_tree_slp_vectorize
= value
;
1435 if (!opts_set
->x_flag_vect_cost_model
)
1436 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1437 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1438 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1441 /* -f{,no-}sanitize{,-recover}= suboptions. */
1442 const struct sanitizer_opts_s 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>} */
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
;
1645 error_at (loc
, "missing argument to %qs", "--help=^");
1648 pflags
= &exclude_flags
;
1651 pflags
= &include_flags
;
1653 comma
= strchr (a
, ',');
1664 /* Check to see if the string matches an option class name. */
1665 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1666 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1668 specific_flag
= specifics
[i
].flag
;
1672 /* Check to see if the string matches a language name.
1673 Note - we rely upon the alpha-sorted nature of the entries in
1674 the lang_names array, specifically that shorter names appear
1675 before their longer variants. (i.e. C before C++). That way
1676 when we are attempting to match --help=c for example we will
1677 match with C first and not C++. */
1678 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1679 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1681 lang_flag
= 1U << i
;
1685 if (specific_flag
!= 0)
1688 *pflags
|= specific_flag
;
1691 /* The option's argument matches both the start of a
1692 language name and the start of an option class name.
1693 We have a special case for when the user has
1694 specified "--help=c", but otherwise we have to issue
1696 if (strncasecmp (a
, "c", len
) == 0)
1697 *pflags
|= lang_flag
;
1700 "--help argument %q.*s is ambiguous, "
1701 "please be more specific",
1705 else if (lang_flag
!= 0)
1706 *pflags
|= lang_flag
;
1709 "unrecognized argument to --help= option: %q.*s",
1718 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1720 opts
->x_exit_after_options
= true;
1725 if (lang_mask
== CL_DRIVER
)
1728 opts
->x_exit_after_options
= true;
1731 case OPT_fsanitize_
:
1732 opts
->x_flag_sanitize
1733 = parse_sanitizer_options (arg
, loc
, code
,
1734 opts
->x_flag_sanitize
, value
, true);
1736 /* Kernel ASan implies normal ASan but does not yet support
1738 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1740 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1741 0, opts
->x_param_values
,
1742 opts_set
->x_param_values
);
1743 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1744 opts_set
->x_param_values
);
1745 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1746 opts_set
->x_param_values
);
1747 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1748 opts
->x_param_values
,
1749 opts_set
->x_param_values
);
1753 case OPT_fsanitize_recover_
:
1754 opts
->x_flag_sanitize_recover
1755 = parse_sanitizer_options (arg
, loc
, code
,
1756 opts
->x_flag_sanitize_recover
, value
, true);
1759 case OPT_fasan_shadow_offset_
:
1763 case OPT_fsanitize_recover
:
1765 opts
->x_flag_sanitize_recover
1766 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1768 opts
->x_flag_sanitize_recover
1769 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1776 /* Currently handled in a prescan. */
1780 dc
->warning_as_error_requested
= value
;
1784 if (lang_mask
== CL_DRIVER
)
1787 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1788 opts
, opts_set
, loc
, dc
);
1791 case OPT_Wlarger_than_
:
1792 opts
->x_larger_than_size
= value
;
1793 opts
->x_warn_larger_than
= value
!= -1;
1796 case OPT_Wfatal_errors
:
1797 dc
->fatal_errors
= value
;
1800 case OPT_Wframe_larger_than_
:
1801 opts
->x_frame_larger_than_size
= value
;
1802 opts
->x_warn_frame_larger_than
= value
!= -1;
1805 case OPT_Wstack_usage_
:
1806 opts
->x_warn_stack_usage
= value
;
1807 opts
->x_flag_stack_usage_info
= value
!= -1;
1810 case OPT_Wstrict_aliasing
:
1811 set_Wstrict_aliasing (opts
, value
);
1814 case OPT_Wstrict_overflow
:
1815 opts
->x_warn_strict_overflow
= (value
1816 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1820 case OPT_Wsystem_headers
:
1821 dc
->dc_warn_system_headers
= value
;
1825 opts
->x_flag_gen_aux_info
= 1;
1828 case OPT_auxbase_strip
:
1830 char *tmp
= xstrdup (arg
);
1831 strip_off_ending (tmp
, strlen (tmp
));
1833 opts
->x_aux_base_name
= tmp
;
1840 decode_d_option (arg
, opts
, loc
, dc
);
1843 case OPT_fcall_used_
:
1844 case OPT_fcall_saved_
:
1852 case OPT_fdbg_cnt_list
:
1854 opts
->x_exit_after_options
= true;
1857 case OPT_fdebug_prefix_map_
:
1861 case OPT_fdiagnostics_show_location_
:
1862 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1865 case OPT_fdiagnostics_show_caret
:
1866 dc
->show_caret
= value
;
1869 case OPT_fdiagnostics_color_
:
1870 diagnostic_color_init (dc
, value
);
1873 case OPT_fdiagnostics_show_option
:
1874 dc
->show_option_requested
= value
;
1881 case OPT_ffast_math
:
1882 set_fast_math_flags (opts
, value
);
1885 case OPT_funsafe_math_optimizations
:
1886 set_unsafe_math_optimizations_flags (opts
, value
);
1893 case OPT_finline_limit_
:
1894 set_param_value ("max-inline-insns-single", value
/ 2,
1895 opts
->x_param_values
, opts_set
->x_param_values
);
1896 set_param_value ("max-inline-insns-auto", value
/ 2,
1897 opts
->x_param_values
, opts_set
->x_param_values
);
1900 case OPT_finstrument_functions_exclude_function_list_
:
1901 add_comma_separated_to_vector
1902 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1905 case OPT_finstrument_functions_exclude_file_list_
:
1906 add_comma_separated_to_vector
1907 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1910 case OPT_fmessage_length_
:
1911 pp_set_line_maximum_length (dc
->printer
, value
);
1912 diagnostic_set_caret_max_width (dc
, value
);
1916 case OPT_fopt_info_
:
1922 const char *p
= arg
;
1923 opts
->x_flag_disable_hsa
= true;
1926 const char *comma
= strchr (p
, ',');
1928 if ((strncmp (p
, "disable", 7) == 0)
1929 && (p
[7] == ',' || p
[7] == '\0'))
1931 opts
->x_flag_disable_hsa
= true;
1935 if ((strncmp (p
, "hsa", 3) == 0)
1936 && (p
[3] == ',' || p
[3] == '\0'))
1939 opts
->x_flag_disable_hsa
= false;
1941 sorry ("HSA has not been enabled during configuration");
1951 #ifndef ACCEL_COMPILER
1952 case OPT_foffload_abi_
:
1953 error_at (loc
, "-foffload-abi option can be specified only for "
1954 "offload compiler");
1958 case OPT_fpack_struct_
:
1959 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1961 "structure alignment must be a small power of two, not %d",
1964 opts
->x_initial_max_fld_align
= value
;
1968 case OPT_fplugin_arg_
:
1972 case OPT_fprofile_use_
:
1973 opts
->x_profile_data_prefix
= xstrdup (arg
);
1974 opts
->x_flag_profile_use
= true;
1976 /* No break here - do -fprofile-use processing. */
1977 case OPT_fprofile_use
:
1978 enable_fdo_optimizations (opts
, opts_set
, value
);
1979 if (!opts_set
->x_flag_profile_reorder_functions
)
1980 opts
->x_flag_profile_reorder_functions
= value
;
1981 /* Indirect call profiling should do all useful transformations
1982 speculative devirtualization does. */
1983 if (!opts_set
->x_flag_devirtualize_speculatively
1984 && opts
->x_flag_value_profile_transformations
)
1985 opts
->x_flag_devirtualize_speculatively
= false;
1988 case OPT_fauto_profile_
:
1989 opts
->x_auto_profile_file
= xstrdup (arg
);
1990 opts
->x_flag_auto_profile
= true;
1992 /* No break here - do -fauto-profile processing. */
1993 case OPT_fauto_profile
:
1994 enable_fdo_optimizations (opts
, opts_set
, value
);
1995 if (!opts_set
->x_flag_profile_correction
)
1996 opts
->x_flag_profile_correction
= value
;
1997 maybe_set_param_value (
1998 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1999 opts
->x_param_values
, opts_set
->x_param_values
);
2002 case OPT_fprofile_generate_
:
2003 opts
->x_profile_data_prefix
= xstrdup (arg
);
2005 /* No break here - do -fprofile-generate processing. */
2006 case OPT_fprofile_generate
:
2007 if (!opts_set
->x_profile_arc_flag
)
2008 opts
->x_profile_arc_flag
= value
;
2009 if (!opts_set
->x_flag_profile_values
)
2010 opts
->x_flag_profile_values
= value
;
2011 if (!opts_set
->x_flag_inline_functions
)
2012 opts
->x_flag_inline_functions
= value
;
2013 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2014 quadratic. Disable the pass until better memory representation
2016 if (!opts_set
->x_flag_ipa_reference
)
2017 opts
->x_flag_ipa_reference
= false;
2020 case OPT_ftree_vectorize
:
2021 if (!opts_set
->x_flag_tree_loop_vectorize
)
2022 opts
->x_flag_tree_loop_vectorize
= value
;
2023 if (!opts_set
->x_flag_tree_slp_vectorize
)
2024 opts
->x_flag_tree_slp_vectorize
= value
;
2026 case OPT_fshow_column
:
2027 dc
->show_column
= value
;
2030 case OPT_frandom_seed
:
2031 /* The real switch is -fno-random-seed. */
2037 case OPT_frandom_seed_
:
2041 case OPT_fsched_verbose_
:
2042 #ifdef INSN_SCHEDULING
2043 /* Handled with Var in common.opt. */
2049 case OPT_fsched_stalled_insns_
:
2050 opts
->x_flag_sched_stalled_insns
= value
;
2051 if (opts
->x_flag_sched_stalled_insns
== 0)
2052 opts
->x_flag_sched_stalled_insns
= -1;
2055 case OPT_fsched_stalled_insns_dep_
:
2056 opts
->x_flag_sched_stalled_insns_dep
= value
;
2059 case OPT_fstack_check_
:
2060 if (!strcmp (arg
, "no"))
2061 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2062 else if (!strcmp (arg
, "generic"))
2063 /* This is the old stack checking method. */
2064 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2065 ? FULL_BUILTIN_STACK_CHECK
2066 : GENERIC_STACK_CHECK
;
2067 else if (!strcmp (arg
, "specific"))
2068 /* This is the new stack checking method. */
2069 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2070 ? FULL_BUILTIN_STACK_CHECK
2071 : STACK_CHECK_STATIC_BUILTIN
2072 ? STATIC_BUILTIN_STACK_CHECK
2073 : GENERIC_STACK_CHECK
;
2075 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2078 case OPT_fstack_limit
:
2079 /* The real switch is -fno-stack-limit. */
2085 case OPT_fstack_limit_register_
:
2086 case OPT_fstack_limit_symbol_
:
2090 case OPT_fstack_usage
:
2091 opts
->x_flag_stack_usage
= value
;
2092 opts
->x_flag_stack_usage_info
= value
!= 0;
2096 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2101 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2105 if (arg
&& strlen (arg
) != 0)
2107 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2108 "use %<-gdwarf-%s%> for DWARF version "
2109 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2113 value
= opts
->x_dwarf_version
;
2117 if (value
< 2 || value
> 5)
2118 error_at (loc
, "dwarf version %d is not supported", value
);
2120 opts
->x_dwarf_version
= value
;
2121 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2124 case OPT_gsplit_dwarf
:
2125 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2130 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2135 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2140 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2145 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2151 /* Handled completely via specs. */
2154 case OPT_pedantic_errors
:
2155 dc
->pedantic_errors
= 1;
2156 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2158 handlers
, opts
, opts_set
,
2163 opts
->x_flag_lto
= value
? "" : NULL
;
2167 dc
->dc_inhibit_warnings
= true;
2170 case OPT_fmax_errors_
:
2171 dc
->max_errors
= value
;
2174 case OPT_fuse_ld_bfd
:
2175 case OPT_fuse_ld_gold
:
2176 case OPT_fuse_linker_plugin
:
2177 /* No-op. Used by the driver and passed to us because it starts with f.*/
2182 opts
->x_flag_trapv
= 0;
2187 opts
->x_flag_wrapv
= 0;
2191 opts
->x_flag_ipa_icf_functions
= value
;
2192 opts
->x_flag_ipa_icf_variables
= value
;
2196 /* If the flag was handled in a standard way, assume the lack of
2197 processing here is intentional. */
2198 gcc_assert (option_flag_var (scode
, opts
));
2202 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2207 /* Handle --param NAME=VALUE. */
2209 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2210 location_t loc
, const char *carg
)
2215 arg
= xstrdup (carg
);
2216 equal
= strchr (arg
, '=');
2218 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2224 enum compiler_param index
;
2225 if (!find_param (arg
, &index
))
2226 error_at (loc
, "invalid --param name %qs", arg
);
2229 if (!param_string_value_p (index
, equal
+ 1, &value
))
2230 value
= integral_argument (equal
+ 1);
2233 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2235 set_param_value (arg
, value
,
2236 opts
->x_param_values
, opts_set
->x_param_values
);
2243 /* Used to set the level of strict aliasing warnings in OPTS,
2244 when no level is specified (i.e., when -Wstrict-aliasing, and not
2245 -Wstrict-aliasing=level was given).
2246 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2247 and 0 otherwise. After calling this function, wstrict_aliasing will be
2248 set to the default value of -Wstrict_aliasing=level, currently 3. */
2250 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2252 gcc_assert (onoff
== 0 || onoff
== 1);
2254 opts
->x_warn_strict_aliasing
= 3;
2256 opts
->x_warn_strict_aliasing
= 0;
2259 /* The following routines are useful in setting all the flags that
2260 -ffast-math and -fno-fast-math imply. */
2262 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2264 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2266 opts
->x_flag_unsafe_math_optimizations
= set
;
2267 set_unsafe_math_optimizations_flags (opts
, set
);
2269 if (!opts
->frontend_set_flag_finite_math_only
)
2270 opts
->x_flag_finite_math_only
= set
;
2271 if (!opts
->frontend_set_flag_errno_math
)
2272 opts
->x_flag_errno_math
= !set
;
2275 if (!opts
->frontend_set_flag_signaling_nans
)
2276 opts
->x_flag_signaling_nans
= 0;
2277 if (!opts
->frontend_set_flag_rounding_math
)
2278 opts
->x_flag_rounding_math
= 0;
2279 if (!opts
->frontend_set_flag_cx_limited_range
)
2280 opts
->x_flag_cx_limited_range
= 1;
2284 /* When -funsafe-math-optimizations is set the following
2285 flags are set as well. */
2287 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2289 if (!opts
->frontend_set_flag_trapping_math
)
2290 opts
->x_flag_trapping_math
= !set
;
2291 if (!opts
->frontend_set_flag_signed_zeros
)
2292 opts
->x_flag_signed_zeros
= !set
;
2293 if (!opts
->frontend_set_flag_associative_math
)
2294 opts
->x_flag_associative_math
= set
;
2295 if (!opts
->frontend_set_flag_reciprocal_math
)
2296 opts
->x_flag_reciprocal_math
= set
;
2299 /* Return true iff flags in OPTS are set as if -ffast-math. */
2301 fast_math_flags_set_p (const struct gcc_options
*opts
)
2303 return (!opts
->x_flag_trapping_math
2304 && opts
->x_flag_unsafe_math_optimizations
2305 && opts
->x_flag_finite_math_only
2306 && !opts
->x_flag_signed_zeros
2307 && !opts
->x_flag_errno_math
);
2310 /* Return true iff flags are set as if -ffast-math but using the flags stored
2311 in the struct cl_optimization structure. */
2313 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2315 return (!opt
->x_flag_trapping_math
2316 && opt
->x_flag_unsafe_math_optimizations
2317 && opt
->x_flag_finite_math_only
2318 && !opt
->x_flag_signed_zeros
2319 && !opt
->x_flag_errno_math
);
2322 /* Handle a debug output -g switch for options OPTS
2323 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2324 explicitly), location LOC. EXTENDED is true or false to support
2325 extended output (2 is special and means "-ggdb" was given). */
2327 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2328 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2331 opts
->x_use_gnu_debug_info_extensions
= extended
;
2333 if (type
== NO_DEBUG
)
2335 if (opts
->x_write_symbols
== NO_DEBUG
)
2337 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2341 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2342 opts
->x_write_symbols
= DWARF2_DEBUG
;
2343 #elif defined DBX_DEBUGGING_INFO
2344 opts
->x_write_symbols
= DBX_DEBUG
;
2348 if (opts
->x_write_symbols
== NO_DEBUG
)
2349 warning_at (loc
, 0, "target system does not support debug output");
2354 /* Does it conflict with an already selected type? */
2355 if (opts_set
->x_write_symbols
!= NO_DEBUG
2356 && opts
->x_write_symbols
!= NO_DEBUG
2357 && type
!= opts
->x_write_symbols
)
2358 error_at (loc
, "debug format %qs conflicts with prior selection",
2359 debug_type_names
[type
]);
2360 opts
->x_write_symbols
= type
;
2361 opts_set
->x_write_symbols
= type
;
2364 /* A debug flag without a level defaults to level 2.
2365 If off or at level 1, set it to level 2, but if already
2366 at level 3, don't lower it. */
2369 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2370 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2374 int argval
= integral_argument (arg
);
2376 error_at (loc
, "unrecognised debug output level %qs", arg
);
2377 else if (argval
> 3)
2378 error_at (loc
, "debug output level %qs is too high", arg
);
2380 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2384 /* Arrange to dump core on error for diagnostic context DC. (The
2385 regular error message is still printed first, except in the case of
2389 setup_core_dumping (diagnostic_context
*dc
)
2392 signal (SIGABRT
, SIG_DFL
);
2394 #if defined(HAVE_SETRLIMIT)
2397 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2398 fatal_error (input_location
, "getting core file size maximum limit: %m");
2399 rlim
.rlim_cur
= rlim
.rlim_max
;
2400 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2401 fatal_error (input_location
,
2402 "setting core file size limit to maximum: %m");
2405 diagnostic_abort_on_error (dc
);
2408 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2409 diagnostic context DC. */
2412 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2413 location_t loc
, diagnostic_context
*dc
)
2421 opts
->x_flag_debug_asm
= 1;
2424 opts
->x_flag_print_asm_name
= 1;
2427 opts
->x_flag_dump_rtl_in_asm
= 1;
2428 opts
->x_flag_print_asm_name
= 1;
2431 opts
->x_rtl_dump_and_exit
= 1;
2433 case 'D': /* These are handled by the preprocessor. */
2440 setup_core_dumping (dc
);
2443 opts
->x_flag_dump_all_passed
= true;
2447 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2452 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2453 mask LANG_MASK, option handlers HANDLERS) as an error for option
2454 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2455 NULL), location LOC. This is used by -Werror=. */
2458 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2459 const struct cl_option_handlers
*handlers
,
2460 struct gcc_options
*opts
,
2461 struct gcc_options
*opts_set
,
2462 location_t loc
, diagnostic_context
*dc
)
2467 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2468 new_option
[0] = 'W';
2469 strcpy (new_option
+ 1, arg
);
2470 option_index
= find_opt (new_option
, lang_mask
);
2471 if (option_index
== OPT_SPECIAL_unknown
)
2472 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2473 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2474 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2478 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2479 const char *arg
= NULL
;
2481 if (cl_options
[option_index
].flags
& CL_JOINED
)
2482 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2483 control_warning_option (option_index
, (int) kind
, arg
, value
,
2485 handlers
, opts
, opts_set
, dc
);
2490 /* Return malloced memory for the name of the option OPTION_INDEX
2491 which enabled a diagnostic (context CONTEXT), originally of type
2492 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2496 option_name (diagnostic_context
*context
, int option_index
,
2497 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2501 /* A warning classified as an error. */
2502 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2503 && diag_kind
== DK_ERROR
)
2504 return concat (cl_options
[OPT_Werror_
].opt_text
,
2505 /* Skip over "-W". */
2506 cl_options
[option_index
].opt_text
+ 2,
2508 /* A warning with option. */
2510 return xstrdup (cl_options
[option_index
].opt_text
);
2512 /* A warning without option classified as an error. */
2513 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2514 || diag_kind
== DK_WARNING
)
2515 && context
->warning_as_error_requested
)
2516 return xstrdup (cl_options
[OPT_Werror
].opt_text
);