1 /* Command line option handling.
2 Copyright (C) 2002-2016 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "diagnostic.h"
30 #include "opts-diagnostic.h"
31 #include "insn-attr-common.h"
32 #include "common/common-target.h"
34 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
36 /* Indexed by enum debug_info_type. */
37 const char *const debug_type_names
[] =
39 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
42 /* Parse the -femit-struct-debug-detailed option value
43 and set the flag variables. */
45 #define MATCH( prefix, string ) \
46 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
47 ? ((string += sizeof prefix - 1), 1) : 0)
50 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
53 /* various labels for comparison */
54 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
55 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
56 static const char none_lbl
[] = "none", any_lbl
[] = "any";
57 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
59 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
60 /* Default is to apply to as much as possible. */
61 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
65 if (MATCH (dfn_lbl
, spec
))
66 usage
= DINFO_USAGE_DFN
;
67 else if (MATCH (dir_lbl
, spec
))
68 usage
= DINFO_USAGE_DIR_USE
;
69 else if (MATCH (ind_lbl
, spec
))
70 usage
= DINFO_USAGE_IND_USE
;
72 /* Generics or not? */
73 if (MATCH (ord_lbl
, spec
))
75 else if (MATCH (gen_lbl
, spec
))
78 /* What allowable environment? */
79 if (MATCH (none_lbl
, spec
))
80 files
= DINFO_STRUCT_FILE_NONE
;
81 else if (MATCH (any_lbl
, spec
))
82 files
= DINFO_STRUCT_FILE_ANY
;
83 else if (MATCH (sys_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_SYS
;
85 else if (MATCH (base_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_BASE
;
89 "argument %qs to %<-femit-struct-debug-detailed%> "
93 /* Effect the specification. */
94 if (usage
== DINFO_USAGE_NUM_ENUMS
)
98 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
99 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
104 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
105 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
112 opts
->x_debug_struct_ordinary
[usage
] = files
;
114 opts
->x_debug_struct_generic
[usage
] = files
;
118 set_struct_debug_option (opts
, loc
, spec
+1);
121 /* No more -femit-struct-debug-detailed specifications.
125 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
127 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
128 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
129 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
130 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
132 "%<-femit-struct-debug-detailed=dir:...%> must allow "
133 "at least as much as "
134 "%<-femit-struct-debug-detailed=ind:...%>");
138 /* Strip off a legitimate source ending from the input string NAME of
139 length LEN. Rather than having to know the names used by all of
140 our front ends, we strip off an ending of a period followed by
141 up to five characters. (Java uses ".class".) */
144 strip_off_ending (char *name
, int len
)
147 for (i
= 2; i
< 6 && len
> i
; i
++)
149 if (name
[len
- i
] == '.')
151 name
[len
- i
] = '\0';
157 /* Find the base name of a path, stripping off both directories and
158 a single final extension. */
160 base_of_path (const char *path
, const char **base_out
)
162 const char *base
= path
;
164 const char *p
= path
;
168 if (IS_DIR_SEPARATOR (c
))
183 /* What to print when a switch has no documentation. */
184 static const char undocumented_msg
[] = N_("This option lacks documentation.");
185 static const char use_diagnosed_msg
[] = N_("Uses of this option are diagnosed.");
187 typedef char *char_p
; /* For DEF_VEC_P. */
189 static void handle_param (struct gcc_options
*opts
,
190 struct gcc_options
*opts_set
, location_t loc
,
192 static void set_debug_level (enum debug_info_type type
, int extended
,
193 const char *arg
, struct gcc_options
*opts
,
194 struct gcc_options
*opts_set
,
196 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
197 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
198 location_t loc
, diagnostic_context
*dc
);
199 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
201 static void enable_warning_as_error (const char *arg
, int value
,
202 unsigned int lang_mask
,
203 const struct cl_option_handlers
*handlers
,
204 struct gcc_options
*opts
,
205 struct gcc_options
*opts_set
,
207 diagnostic_context
*dc
);
209 /* Handle a back-end option; arguments and return value as for
213 target_handle_option (struct gcc_options
*opts
,
214 struct gcc_options
*opts_set
,
215 const struct cl_decoded_option
*decoded
,
216 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
218 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
219 diagnostic_context
*dc
)
221 gcc_assert (dc
== global_dc
);
222 gcc_assert (kind
== DK_UNSPECIFIED
);
223 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
226 /* Add comma-separated strings to a char_p vector. */
229 add_comma_separated_to_vector (void **pvec
, const char *arg
)
235 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
237 vec_check_alloc (v
, 1);
239 /* We never free this string. */
252 v
->safe_push (token_start
);
255 if (*r
== '\\' && r
[1] == ',')
263 if (*token_start
!= '\0')
264 v
->safe_push (token_start
);
269 /* Initialize opts_obstack. */
272 init_opts_obstack (void)
274 gcc_obstack_init (&opts_obstack
);
277 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
280 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
282 size_t num_params
= get_num_compiler_params ();
284 /* Ensure that opts_obstack has already been initialized by the time
285 that we initialize any gcc_options instances (PR jit/68446). */
286 gcc_assert (opts_obstack
.chunk_size
> 0);
288 *opts
= global_options_init
;
291 memset (opts_set
, 0, sizeof (*opts_set
));
293 opts
->x_param_values
= XNEWVEC (int, num_params
);
296 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
298 init_param_values (opts
->x_param_values
);
300 /* Initialize whether `char' is signed. */
301 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
302 /* Set this to a special "uninitialized" value. The actual default
303 is set after target options have been processed. */
304 opts
->x_flag_short_enums
= 2;
306 /* Initialize target_flags before default_options_optimization
307 so the latter can modify it. */
308 opts
->x_target_flags
= targetm_common
.default_target_flags
;
310 /* Some targets have ABI-specified unwind tables. */
311 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
313 /* Some targets have other target-specific initialization. */
314 targetm_common
.option_init_struct (opts
);
317 /* Release any allocations owned by OPTS. */
320 finalize_options_struct (struct gcc_options
*opts
)
322 XDELETEVEC (opts
->x_param_values
);
325 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
326 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
327 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
328 mask LANG_MASK and option handlers HANDLERS. */
331 maybe_default_option (struct gcc_options
*opts
,
332 struct gcc_options
*opts_set
,
333 const struct default_options
*default_opt
,
334 int level
, bool size
, bool fast
, bool debug
,
335 unsigned int lang_mask
,
336 const struct cl_option_handlers
*handlers
,
338 diagnostic_context
*dc
)
340 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
344 gcc_assert (level
== 2);
346 gcc_assert (level
== 3);
348 gcc_assert (level
== 1);
350 switch (default_opt
->levels
)
356 case OPT_LEVELS_0_ONLY
:
357 enabled
= (level
== 0);
360 case OPT_LEVELS_1_PLUS
:
361 enabled
= (level
>= 1);
364 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
365 enabled
= (level
>= 1 && !size
&& !debug
);
368 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
369 enabled
= (level
>= 1 && !debug
);
372 case OPT_LEVELS_2_PLUS
:
373 enabled
= (level
>= 2);
376 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
377 enabled
= (level
>= 2 && !size
&& !debug
);
380 case OPT_LEVELS_3_PLUS
:
381 enabled
= (level
>= 3);
384 case OPT_LEVELS_3_PLUS_AND_SIZE
:
385 enabled
= (level
>= 3 || size
);
388 case OPT_LEVELS_SIZE
:
392 case OPT_LEVELS_FAST
:
396 case OPT_LEVELS_NONE
:
402 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
403 default_opt
->arg
, default_opt
->value
,
404 lang_mask
, DK_UNSPECIFIED
, loc
,
406 else if (default_opt
->arg
== NULL
407 && !option
->cl_reject_negative
)
408 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
409 default_opt
->arg
, !default_opt
->value
,
410 lang_mask
, DK_UNSPECIFIED
, loc
,
414 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
415 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
416 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
417 language mask LANG_MASK and option handlers HANDLERS. */
420 maybe_default_options (struct gcc_options
*opts
,
421 struct gcc_options
*opts_set
,
422 const struct default_options
*default_opts
,
423 int level
, bool size
, bool fast
, bool debug
,
424 unsigned int lang_mask
,
425 const struct cl_option_handlers
*handlers
,
427 diagnostic_context
*dc
)
431 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
432 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
433 level
, size
, fast
, debug
,
434 lang_mask
, handlers
, loc
, dc
);
437 /* Table of options enabled by default at different levels. */
439 static const struct default_options default_options_table
[] =
441 /* -O1 optimizations. */
442 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS
, OPT_ftree_coalesce_vars
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
465 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
466 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
467 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
468 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
469 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
470 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
471 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
472 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
473 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
474 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
475 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
476 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
477 { OPT_LEVELS_1_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
479 /* -O2 optimizations. */
480 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
492 #ifdef INSN_SCHEDULING
493 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
494 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_freorder_blocks_algorithm_
, NULL
,
500 REORDER_BLOCKS_ALGORITHM_STC
},
501 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
503 { OPT_LEVELS_2_PLUS
, OPT_fcode_hoisting
, NULL
, 1 },
504 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
505 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
506 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
507 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp_alignment
, NULL
, 1 },
508 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
509 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
510 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
511 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
512 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
513 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
514 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
515 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
516 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
517 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
518 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
519 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
520 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
521 { OPT_LEVELS_2_PLUS
, OPT_fipa_ra
, NULL
, 1 },
522 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
524 /* -O3 optimizations. */
525 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
526 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
527 { OPT_LEVELS_3_PLUS
, OPT_fsplit_paths
, NULL
, 1 },
528 /* Inlining of functions reducing size is a good idea with -Os
529 regardless of them being declared inline. */
530 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
531 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
532 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
533 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
534 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
535 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
536 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
537 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
538 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
539 { OPT_LEVELS_3_PLUS
, OPT_fpeel_loops
, NULL
, 1 },
541 /* -Ofast adds optimizations to -O3. */
542 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
544 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
547 /* Default the options in OPTS and OPTS_SET based on the optimization
548 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
550 default_options_optimization (struct gcc_options
*opts
,
551 struct gcc_options
*opts_set
,
552 struct cl_decoded_option
*decoded_options
,
553 unsigned int decoded_options_count
,
555 unsigned int lang_mask
,
556 const struct cl_option_handlers
*handlers
,
557 diagnostic_context
*dc
)
561 bool openacc_mode
= false;
563 /* Scan to see what optimization level has been specified. That will
564 determine the default value of many flags. */
565 for (i
= 1; i
< decoded_options_count
; i
++)
567 struct cl_decoded_option
*opt
= &decoded_options
[i
];
568 switch (opt
->opt_index
)
571 if (*opt
->arg
== '\0')
573 opts
->x_optimize
= 1;
574 opts
->x_optimize_size
= 0;
575 opts
->x_optimize_fast
= 0;
576 opts
->x_optimize_debug
= 0;
580 const int optimize_val
= integral_argument (opt
->arg
);
581 if (optimize_val
== -1)
582 error_at (loc
, "argument to %<-O%> should be a non-negative "
583 "integer, %<g%>, %<s%> or %<fast%>");
586 opts
->x_optimize
= optimize_val
;
587 if ((unsigned int) opts
->x_optimize
> 255)
588 opts
->x_optimize
= 255;
589 opts
->x_optimize_size
= 0;
590 opts
->x_optimize_fast
= 0;
591 opts
->x_optimize_debug
= 0;
597 opts
->x_optimize_size
= 1;
599 /* Optimizing for size forces optimize to be 2. */
600 opts
->x_optimize
= 2;
601 opts
->x_optimize_fast
= 0;
602 opts
->x_optimize_debug
= 0;
606 /* -Ofast only adds flags to -O3. */
607 opts
->x_optimize_size
= 0;
608 opts
->x_optimize
= 3;
609 opts
->x_optimize_fast
= 1;
610 opts
->x_optimize_debug
= 0;
614 /* -Og selects optimization level 1. */
615 opts
->x_optimize_size
= 0;
616 opts
->x_optimize
= 1;
617 opts
->x_optimize_fast
= 0;
618 opts
->x_optimize_debug
= 1;
627 /* Ignore other options in this prescan. */
632 maybe_default_options (opts
, opts_set
, default_options_table
,
633 opts
->x_optimize
, opts
->x_optimize_size
,
634 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
635 lang_mask
, handlers
, loc
, dc
);
637 /* -O2 param settings. */
638 opt2
= (opts
->x_optimize
>= 2);
641 && !opts_set
->x_flag_ipa_pta
)
642 opts
->x_flag_ipa_pta
= true;
644 /* Track fields in field-sensitive alias analysis. */
645 maybe_set_param_value
646 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
647 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
648 opts
->x_param_values
, opts_set
->x_param_values
);
650 /* For -O1 only do loop invariant motion for very small loops. */
651 maybe_set_param_value
652 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
653 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
654 opts
->x_param_values
, opts_set
->x_param_values
);
656 /* At -Ofast, allow store motion to introduce potential race conditions. */
657 maybe_set_param_value
658 (PARAM_ALLOW_STORE_DATA_RACES
,
659 opts
->x_optimize_fast
? 1
660 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
661 opts
->x_param_values
, opts_set
->x_param_values
);
663 if (opts
->x_optimize_size
)
664 /* We want to crossjump as much as possible. */
665 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
666 opts
->x_param_values
, opts_set
->x_param_values
);
668 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
669 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
670 opts
->x_param_values
, opts_set
->x_param_values
);
672 /* Restrict the amount of work combine does at -Og while retaining
673 most of its useful transforms. */
674 if (opts
->x_optimize_debug
)
675 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
676 opts
->x_param_values
, opts_set
->x_param_values
);
678 /* Allow default optimizations to be specified on a per-machine basis. */
679 maybe_default_options (opts
, opts_set
,
680 targetm_common
.option_optimization_table
,
681 opts
->x_optimize
, opts
->x_optimize_size
,
682 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
683 lang_mask
, handlers
, loc
, dc
);
686 /* After all options at LOC have been read into OPTS and OPTS_SET,
687 finalize settings of those options and diagnose incompatible
690 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
693 enum unwind_info_type ui_except
;
695 if (opts
->x_dump_base_name
696 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
697 && ! opts
->x_dump_base_name_prefixed
)
699 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
700 OPTS->X_DUMP_DIR_NAME directory. Then try to make
701 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
702 directory, typically the directory to contain the object
704 if (opts
->x_dump_dir_name
)
705 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
706 opts
->x_dump_base_name
, NULL
);
707 else if (opts
->x_aux_base_name
708 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
710 const char *aux_base
;
712 base_of_path (opts
->x_aux_base_name
, &aux_base
);
713 if (opts
->x_aux_base_name
!= aux_base
)
715 int dir_len
= aux_base
- opts
->x_aux_base_name
;
716 char *new_dump_base_name
717 = XOBNEWVEC (&opts_obstack
, char,
718 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
720 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
721 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
722 /* Append existing OPTS->X_DUMP_BASE_NAME. */
723 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
724 opts
->x_dump_base_name
= new_dump_base_name
;
727 opts
->x_dump_base_name_prefixed
= true;
730 /* Handle related options for unit-at-a-time, toplevel-reorder, and
732 if (!opts
->x_flag_unit_at_a_time
)
734 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
735 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
737 opts
->x_flag_section_anchors
= 0;
738 if (opts
->x_flag_toplevel_reorder
== 1)
739 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
741 opts
->x_flag_toplevel_reorder
= 0;
744 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
745 sorry ("transactional memory is not supported with non-call exceptions");
747 /* Unless the user has asked for section anchors, we disable toplevel
748 reordering at -O0 to disable transformations that might be surprising
749 to end users and to get -fno-toplevel-reorder tested. */
750 if (!opts
->x_optimize
751 && opts
->x_flag_toplevel_reorder
== 2
752 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
754 opts
->x_flag_toplevel_reorder
= 0;
755 opts
->x_flag_section_anchors
= 0;
757 if (!opts
->x_flag_toplevel_reorder
)
759 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
760 error_at (loc
, "section anchors must be disabled when toplevel reorder"
762 opts
->x_flag_section_anchors
= 0;
765 if (!opts
->x_flag_opts_finished
)
767 /* We initialize opts->x_flag_pie to -1 so that targets can set a
769 if (opts
->x_flag_pie
== -1)
771 /* We initialize opts->x_flag_pic to -1 so that we can tell if
772 -fpic, -fPIC, -fno-pic or -fno-PIC is used. */
773 if (opts
->x_flag_pic
== -1)
774 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
776 opts
->x_flag_pie
= 0;
778 /* If -fPIE or -fpie is used, turn on PIC. */
779 if (opts
->x_flag_pie
)
780 opts
->x_flag_pic
= opts
->x_flag_pie
;
781 else if (opts
->x_flag_pic
== -1)
782 opts
->x_flag_pic
= 0;
783 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
784 opts
->x_flag_shlib
= 1;
785 opts
->x_flag_opts_finished
= true;
788 /* We initialize opts->x_flag_stack_protect to -1 so that targets
789 can set a default value. */
790 if (opts
->x_flag_stack_protect
== -1)
791 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
793 if (opts
->x_optimize
== 0)
795 /* Inlining does not work if not optimizing,
796 so force it not to be done. */
797 opts
->x_warn_inline
= 0;
798 opts
->x_flag_no_inline
= 1;
801 /* The optimization to partition hot and cold basic blocks into separate
802 sections of the .o and executable files does not work (currently)
803 with exception handling. This is because there is no support for
804 generating unwind info. If opts->x_flag_exceptions is turned on
805 we need to turn off the partitioning optimization. */
807 ui_except
= targetm_common
.except_unwind_info (opts
);
809 if (opts
->x_flag_exceptions
810 && opts
->x_flag_reorder_blocks_and_partition
811 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
813 if (opts_set
->x_flag_reorder_blocks_and_partition
)
815 "-freorder-blocks-and-partition does not work "
816 "with exceptions on this architecture");
817 opts
->x_flag_reorder_blocks_and_partition
= 0;
818 opts
->x_flag_reorder_blocks
= 1;
821 /* If user requested unwind info, then turn off the partitioning
824 if (opts
->x_flag_unwind_tables
825 && !targetm_common
.unwind_tables_default
826 && opts
->x_flag_reorder_blocks_and_partition
827 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
829 if (opts_set
->x_flag_reorder_blocks_and_partition
)
831 "-freorder-blocks-and-partition does not support "
832 "unwind info on this architecture");
833 opts
->x_flag_reorder_blocks_and_partition
= 0;
834 opts
->x_flag_reorder_blocks
= 1;
837 /* If the target requested unwind info, then turn off the partitioning
838 optimization with a different message. Likewise, if the target does not
839 support named sections. */
841 if (opts
->x_flag_reorder_blocks_and_partition
842 && (!targetm_common
.have_named_sections
843 || (opts
->x_flag_unwind_tables
844 && targetm_common
.unwind_tables_default
845 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
847 if (opts_set
->x_flag_reorder_blocks_and_partition
)
849 "-freorder-blocks-and-partition does not work "
850 "on this architecture");
851 opts
->x_flag_reorder_blocks_and_partition
= 0;
852 opts
->x_flag_reorder_blocks
= 1;
855 /* Disable -freorder-blocks-and-partition when -fprofile-use is not in
856 effect. Function splitting was not actually being performed in that case,
857 as probably_never_executed_bb_p does not distinguish any basic blocks as
858 being cold vs hot when there is no profile data. Leaving it enabled,
859 however, causes the assembly code generator to create (empty) cold
860 sections and labels, leading to unnecessary size overhead. */
861 if (opts
->x_flag_reorder_blocks_and_partition
862 && !opts_set
->x_flag_profile_use
)
863 opts
->x_flag_reorder_blocks_and_partition
= 0;
865 if (opts
->x_flag_reorder_blocks_and_partition
866 && !opts_set
->x_flag_reorder_functions
)
867 opts
->x_flag_reorder_functions
= 1;
869 /* Pipelining of outer loops is only possible when general pipelining
870 capabilities are requested. */
871 if (!opts
->x_flag_sel_sched_pipelining
)
872 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
874 if (opts
->x_flag_conserve_stack
)
876 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
877 opts
->x_param_values
, opts_set
->x_param_values
);
878 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
879 opts
->x_param_values
, opts_set
->x_param_values
);
882 if (opts
->x_flag_lto
)
885 opts
->x_flag_generate_lto
= 1;
887 /* When generating IL, do not operate in whole-program mode.
888 Otherwise, symbols will be privatized too early, causing link
890 opts
->x_flag_whole_program
= 0;
892 error_at (loc
, "LTO support has not been enabled in this configuration");
894 if (!opts
->x_flag_fat_lto_objects
896 || (opts_set
->x_flag_use_linker_plugin
897 && !opts
->x_flag_use_linker_plugin
)))
899 if (opts_set
->x_flag_fat_lto_objects
)
900 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
901 opts
->x_flag_fat_lto_objects
= 1;
905 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
906 default value if they choose based on other options. */
907 if (opts
->x_flag_split_stack
== -1)
908 opts
->x_flag_split_stack
= 0;
909 else if (opts
->x_flag_split_stack
)
911 if (!targetm_common
.supports_split_stack (true, opts
))
913 error_at (loc
, "%<-fsplit-stack%> is not supported by "
914 "this compiler configuration");
915 opts
->x_flag_split_stack
= 0;
919 /* Tune vectorization related parametees according to cost model. */
920 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
922 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
923 6, opts
->x_param_values
, opts_set
->x_param_values
);
924 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
925 0, opts
->x_param_values
, opts_set
->x_param_values
);
926 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
927 0, opts
->x_param_values
, opts_set
->x_param_values
);
930 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
932 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
933 || !opts
->x_flag_tree_loop_if_convert
)
934 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
935 opts
->x_param_values
, opts_set
->x_param_values
);
937 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
938 if (opts
->x_dwarf_split_debug_info
)
939 opts
->x_debug_generate_pub_sections
= 2;
941 /* Userspace and kernel ASan conflict with each other. */
943 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
944 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
946 "-fsanitize=address is incompatible with "
947 "-fsanitize=kernel-address");
951 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
952 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
954 "-fsanitize=address and -fsanitize=kernel-address "
955 "are incompatible with -fsanitize=thread");
957 /* Error recovery is not allowed for LSan and TSan. */
959 if (opts
->x_flag_sanitize_recover
& SANITIZE_THREAD
)
960 error_at (loc
, "-fsanitize-recover=thread is not supported");
962 if (opts
->x_flag_sanitize_recover
& SANITIZE_LEAK
)
963 error_at (loc
, "-fsanitize-recover=leak is not supported");
965 /* When instrumenting the pointers, we don't want to remove
966 the null pointer checks. */
967 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
968 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
969 opts
->x_flag_delete_null_pointer_checks
= 0;
971 /* Aggressive compiler optimizations may cause false negatives. */
972 if (opts
->x_flag_sanitize
)
974 opts
->x_flag_aggressive_loop_optimizations
= 0;
975 opts
->x_flag_strict_overflow
= 0;
979 #define LEFT_COLUMN 27
981 /* Output ITEM, of length ITEM_WIDTH, in the left column,
982 followed by word-wrapped HELP in a second column. */
984 wrap_help (const char *help
,
986 unsigned int item_width
,
987 unsigned int columns
)
989 unsigned int col_width
= LEFT_COLUMN
;
990 unsigned int remaining
, room
, len
;
992 remaining
= strlen (help
);
996 room
= columns
- 3 - MAX (col_width
, item_width
);
1005 for (i
= 0; help
[i
]; i
++)
1007 if (i
>= room
&& len
!= remaining
)
1011 else if ((help
[i
] == '-' || help
[i
] == '/')
1012 && help
[i
+ 1] != ' '
1013 && i
> 0 && ISALPHA (help
[i
- 1]))
1018 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1020 while (help
[len
] == ' ')
1028 /* Print help for a specific front-end, etc. */
1030 print_filtered_help (unsigned int include_flags
,
1031 unsigned int exclude_flags
,
1032 unsigned int any_flags
,
1033 unsigned int columns
,
1034 struct gcc_options
*opts
,
1035 unsigned int lang_mask
)
1040 bool displayed
= false;
1043 if (include_flags
== CL_PARAMS
)
1045 for (i
= 0; i
< LAST_PARAM
; i
++)
1047 const char *param
= compiler_params
[i
].option
;
1049 help
= compiler_params
[i
].help
;
1050 if (help
== NULL
|| *help
== '\0')
1052 if (exclude_flags
& CL_UNDOCUMENTED
)
1054 help
= undocumented_msg
;
1057 /* Get the translation. */
1060 if (!opts
->x_quiet_flag
)
1062 snprintf (new_help
, sizeof (new_help
),
1063 _("default %d minimum %d maximum %d"),
1064 compiler_params
[i
].default_value
,
1065 compiler_params
[i
].min_value
,
1066 compiler_params
[i
].max_value
);
1069 wrap_help (help
, param
, strlen (param
), columns
);
1075 if (!opts
->x_help_printed
)
1076 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1078 if (!opts
->x_help_enum_printed
)
1079 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1081 for (i
= 0; i
< cl_options_count
; i
++)
1083 const struct cl_option
*option
= cl_options
+ i
;
1088 if (include_flags
== 0
1089 || ((option
->flags
& include_flags
) != include_flags
))
1091 if ((option
->flags
& any_flags
) == 0)
1095 /* Skip unwanted switches. */
1096 if ((option
->flags
& exclude_flags
) != 0)
1099 /* The driver currently prints its own help text. */
1100 if ((option
->flags
& CL_DRIVER
) != 0
1101 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1102 | CL_COMMON
| CL_TARGET
)) == 0)
1106 /* Skip switches that have already been printed. */
1107 if (opts
->x_help_printed
[i
])
1110 opts
->x_help_printed
[i
] = true;
1112 help
= option
->help
;
1115 if (exclude_flags
& CL_UNDOCUMENTED
)
1118 help
= undocumented_msg
;
1121 if (option
->alias_target
< N_OPTS
1122 && cl_options
[option
->alias_target
].help
)
1124 if (help
== undocumented_msg
)
1126 /* For undocumented options that are aliases for other options
1127 that are documented, point the reader to the other option in
1128 preference of the former. */
1129 snprintf (new_help
, sizeof new_help
,
1130 _("Same as %s. Use the latter option instead."),
1131 cl_options
[option
->alias_target
].opt_text
);
1135 /* For documented options with aliases, mention the aliased
1136 option's name for reference. */
1137 snprintf (new_help
, sizeof new_help
,
1138 _("%s Same as %s."),
1139 help
, cl_options
[option
->alias_target
].opt_text
);
1145 if (option
->warn_message
)
1147 /* Mention that the use of the option will trigger a warning. */
1148 if (help
== new_help
)
1149 snprintf (new_help
+ strlen (new_help
),
1150 sizeof new_help
- strlen (new_help
),
1151 " %s", _(use_diagnosed_msg
));
1153 snprintf (new_help
, sizeof new_help
,
1154 "%s %s", help
, _(use_diagnosed_msg
));
1159 /* Get the translation. */
1162 /* Find the gap between the name of the
1163 option and its descriptive text. */
1164 tab
= strchr (help
, '\t');
1173 opt
= option
->opt_text
;
1177 /* With the -Q option enabled we change the descriptive text associated
1178 with an option to be an indication of its current setting. */
1179 if (!opts
->x_quiet_flag
)
1181 void *flag_var
= option_flag_var (i
, opts
);
1183 if (len
< (LEFT_COLUMN
+ 2))
1184 strcpy (new_help
, "\t\t");
1186 strcpy (new_help
, "\t");
1188 if (flag_var
!= NULL
1189 && option
->var_type
!= CLVC_DEFER
)
1191 if (option
->flags
& CL_JOINED
)
1193 if (option
->var_type
== CLVC_STRING
)
1195 if (* (const char **) flag_var
!= NULL
)
1196 snprintf (new_help
+ strlen (new_help
),
1197 sizeof (new_help
) - strlen (new_help
),
1198 "%s", * (const char **) flag_var
);
1200 else if (option
->var_type
== CLVC_ENUM
)
1202 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1204 const char *arg
= NULL
;
1206 value
= e
->get (flag_var
);
1207 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1209 arg
= _("[default]");
1210 snprintf (new_help
+ strlen (new_help
),
1211 sizeof (new_help
) - strlen (new_help
),
1215 sprintf (new_help
+ strlen (new_help
),
1216 "%#x", * (int *) flag_var
);
1219 strcat (new_help
, option_enabled (i
, opts
)
1220 ? _("[enabled]") : _("[disabled]"));
1226 wrap_help (help
, opt
, len
, columns
);
1229 if (option
->var_type
== CLVC_ENUM
1230 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1231 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1236 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1239 printf (_(" No options with the desired characteristics were found\n"));
1244 /* PR 31349: Tell the user how to see all of the
1245 options supported by a specific front end. */
1246 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1247 if ((1U << i
) & langs
)
1248 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1249 lang_names
[i
], lang_names
[i
]);
1253 else if (! displayed
)
1254 printf (_(" All options with the desired characteristics have already been displayed\n"));
1258 /* Print details of enumerated option arguments, if those
1259 enumerations have help text headings provided. If no help text
1260 is provided, presume that the possible values are listed in the
1261 help text for the relevant options. */
1262 for (i
= 0; i
< cl_enums_count
; i
++)
1264 unsigned int j
, pos
;
1266 if (opts
->x_help_enum_printed
[i
] != 1)
1268 if (cl_enums
[i
].help
== NULL
)
1270 printf (" %s\n ", _(cl_enums
[i
].help
));
1272 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1274 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1276 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1278 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1288 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1293 opts
->x_help_enum_printed
[i
] = 2;
1297 /* Display help for a specified type of option.
1298 The options must have ALL of the INCLUDE_FLAGS set
1299 ANY of the flags in the ANY_FLAGS set
1300 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1301 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1303 print_specific_help (unsigned int include_flags
,
1304 unsigned int exclude_flags
,
1305 unsigned int any_flags
,
1306 struct gcc_options
*opts
,
1307 unsigned int lang_mask
)
1309 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1310 const char * description
= NULL
;
1311 const char * descrip_extra
= "";
1315 /* Sanity check: Make sure that we do not have more
1316 languages than we have bits available to enumerate them. */
1317 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1319 /* If we have not done so already, obtain
1320 the desired maximum width of the output. */
1321 if (opts
->x_help_columns
== 0)
1323 opts
->x_help_columns
= get_terminal_width ();
1324 if (opts
->x_help_columns
== INT_MAX
)
1325 /* Use a reasonable default. */
1326 opts
->x_help_columns
= 80;
1329 /* Decide upon the title for the options that we are going to display. */
1330 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1332 switch (flag
& include_flags
)
1339 description
= _("The following options are target specific");
1342 description
= _("The following options control compiler warning messages");
1344 case CL_OPTIMIZATION
:
1345 description
= _("The following options control optimizations");
1348 description
= _("The following options are language-independent");
1351 description
= _("The --param option recognizes the following as parameters");
1354 if (i
>= cl_lang_count
)
1356 if (exclude_flags
& all_langs_mask
)
1357 description
= _("The following options are specific to just the language ");
1359 description
= _("The following options are supported by the language ");
1360 descrip_extra
= lang_names
[i
];
1365 if (description
== NULL
)
1369 if (include_flags
& CL_UNDOCUMENTED
)
1370 description
= _("The following options are not documented");
1371 else if (include_flags
& CL_SEPARATE
)
1372 description
= _("The following options take separate arguments");
1373 else if (include_flags
& CL_JOINED
)
1374 description
= _("The following options take joined arguments");
1377 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1384 if (any_flags
& all_langs_mask
)
1385 description
= _("The following options are language-related");
1387 description
= _("The following options are language-independent");
1391 printf ("%s%s:\n", description
, descrip_extra
);
1392 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1393 opts
->x_help_columns
, opts
, lang_mask
);
1396 /* Enable FDO-related flags. */
1399 enable_fdo_optimizations (struct gcc_options
*opts
,
1400 struct gcc_options
*opts_set
,
1403 if (!opts_set
->x_flag_branch_probabilities
)
1404 opts
->x_flag_branch_probabilities
= value
;
1405 if (!opts_set
->x_flag_profile_values
)
1406 opts
->x_flag_profile_values
= value
;
1407 if (!opts_set
->x_flag_unroll_loops
)
1408 opts
->x_flag_unroll_loops
= value
;
1409 if (!opts_set
->x_flag_peel_loops
)
1410 opts
->x_flag_peel_loops
= value
;
1411 if (!opts_set
->x_flag_tracer
)
1412 opts
->x_flag_tracer
= value
;
1413 if (!opts_set
->x_flag_value_profile_transformations
)
1414 opts
->x_flag_value_profile_transformations
= value
;
1415 if (!opts_set
->x_flag_inline_functions
)
1416 opts
->x_flag_inline_functions
= value
;
1417 if (!opts_set
->x_flag_ipa_cp
)
1418 opts
->x_flag_ipa_cp
= value
;
1419 if (!opts_set
->x_flag_ipa_cp_clone
1420 && value
&& opts
->x_flag_ipa_cp
)
1421 opts
->x_flag_ipa_cp_clone
= value
;
1422 if (!opts_set
->x_flag_ipa_cp_alignment
1423 && value
&& opts
->x_flag_ipa_cp
)
1424 opts
->x_flag_ipa_cp_alignment
= value
;
1425 if (!opts_set
->x_flag_predictive_commoning
)
1426 opts
->x_flag_predictive_commoning
= value
;
1427 if (!opts_set
->x_flag_unswitch_loops
)
1428 opts
->x_flag_unswitch_loops
= value
;
1429 if (!opts_set
->x_flag_gcse_after_reload
)
1430 opts
->x_flag_gcse_after_reload
= value
;
1431 if (!opts_set
->x_flag_tree_loop_vectorize
1432 && !opts_set
->x_flag_tree_vectorize
)
1433 opts
->x_flag_tree_loop_vectorize
= value
;
1434 if (!opts_set
->x_flag_tree_slp_vectorize
1435 && !opts_set
->x_flag_tree_vectorize
)
1436 opts
->x_flag_tree_slp_vectorize
= value
;
1437 if (!opts_set
->x_flag_vect_cost_model
)
1438 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1439 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1440 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1443 /* -f{,no-}sanitize{,-recover}= suboptions. */
1444 const struct sanitizer_opts_s sanitizer_opts
[] =
1446 #define SANITIZER_OPT(name, flags) { #name, flags, sizeof #name - 1 }
1447 SANITIZER_OPT (address
, SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
),
1448 SANITIZER_OPT (kernel
-address
, SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
),
1449 SANITIZER_OPT (thread
, SANITIZE_THREAD
),
1450 SANITIZER_OPT (leak
, SANITIZE_LEAK
),
1451 SANITIZER_OPT (shift
, SANITIZE_SHIFT
),
1452 SANITIZER_OPT (integer
-divide
-by
-zero
, SANITIZE_DIVIDE
),
1453 SANITIZER_OPT (undefined
, SANITIZE_UNDEFINED
),
1454 SANITIZER_OPT (unreachable
, SANITIZE_UNREACHABLE
),
1455 SANITIZER_OPT (vla
-bound
, SANITIZE_VLA
),
1456 SANITIZER_OPT (return, SANITIZE_RETURN
),
1457 SANITIZER_OPT (null
, SANITIZE_NULL
),
1458 SANITIZER_OPT (signed-integer
-overflow
, SANITIZE_SI_OVERFLOW
),
1459 SANITIZER_OPT (bool, SANITIZE_BOOL
),
1460 SANITIZER_OPT (enum, SANITIZE_ENUM
),
1461 SANITIZER_OPT (float-divide
-by
-zero
, SANITIZE_FLOAT_DIVIDE
),
1462 SANITIZER_OPT (float-cast
-overflow
, SANITIZE_FLOAT_CAST
),
1463 SANITIZER_OPT (bounds
, SANITIZE_BOUNDS
),
1464 SANITIZER_OPT (bounds
-strict
, SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
),
1465 SANITIZER_OPT (alignment
, SANITIZE_ALIGNMENT
),
1466 SANITIZER_OPT (nonnull
-attribute
, SANITIZE_NONNULL_ATTRIBUTE
),
1467 SANITIZER_OPT (returns
-nonnull
-attribute
, SANITIZE_RETURNS_NONNULL_ATTRIBUTE
),
1468 SANITIZER_OPT (object
-size
, SANITIZE_OBJECT_SIZE
),
1469 SANITIZER_OPT (vptr
, SANITIZE_VPTR
),
1470 SANITIZER_OPT (all
, ~0),
1471 #undef SANITIZER_OPT
1475 /* Parse comma separated sanitizer suboptions from P for option SCODE,
1476 adjust previous FLAGS and return new ones. If COMPLAIN is false,
1477 don't issue diagnostics. */
1480 parse_sanitizer_options (const char *p
, location_t loc
, int scode
,
1481 unsigned int flags
, int value
, bool complain
)
1483 enum opt_code code
= (enum opt_code
) scode
;
1488 const char *comma
= strchr (p
, ',');
1500 /* Check to see if the string matches an option class name. */
1501 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1502 if (len
== sanitizer_opts
[i
].len
1503 && memcmp (p
, sanitizer_opts
[i
].name
, len
) == 0)
1505 /* Handle both -fsanitize and -fno-sanitize cases. */
1506 if (value
&& sanitizer_opts
[i
].flag
== ~0U)
1508 if (code
== OPT_fsanitize_
)
1511 error_at (loc
, "-fsanitize=all option is not valid");
1514 flags
|= ~(SANITIZE_USER_ADDRESS
| SANITIZE_THREAD
1518 flags
|= sanitizer_opts
[i
].flag
;
1520 flags
&= ~sanitizer_opts
[i
].flag
;
1525 if (! found
&& complain
)
1526 error_at (loc
, "unrecognized argument to -fsanitize%s= option: %q.*s",
1527 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1536 /* Handle target- and language-independent options. Return zero to
1537 generate an "unknown option" message. Only options that need
1538 extra handling need to be listed here; if you simply want
1539 DECODED->value assigned to a variable, it happens automatically. */
1542 common_handle_option (struct gcc_options
*opts
,
1543 struct gcc_options
*opts_set
,
1544 const struct cl_decoded_option
*decoded
,
1545 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1547 const struct cl_option_handlers
*handlers
,
1548 diagnostic_context
*dc
)
1550 size_t scode
= decoded
->opt_index
;
1551 const char *arg
= decoded
->arg
;
1552 int value
= decoded
->value
;
1553 enum opt_code code
= (enum opt_code
) scode
;
1555 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1560 handle_param (opts
, opts_set
, loc
, arg
);
1565 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1566 unsigned int undoc_mask
;
1569 if (lang_mask
== CL_DRIVER
)
1572 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1575 /* First display any single language specific options. */
1576 for (i
= 0; i
< cl_lang_count
; i
++)
1578 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1580 /* Next display any multi language specific options. */
1581 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1582 /* Then display any remaining, non-language options. */
1583 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1585 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1586 opts
->x_exit_after_options
= true;
1590 case OPT__target_help
:
1591 if (lang_mask
== CL_DRIVER
)
1594 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1595 opts
->x_exit_after_options
= true;
1600 const char *a
= arg
;
1601 unsigned int include_flags
= 0;
1602 /* Note - by default we include undocumented options when listing
1603 specific classes. If you only want to see documented options
1604 then add ",^undocumented" to the --help= option. E.g.:
1606 --help=target,^undocumented */
1607 unsigned int exclude_flags
= 0;
1609 if (lang_mask
== CL_DRIVER
)
1612 /* Walk along the argument string, parsing each word in turn.
1614 arg = [^]{word}[,{arg}]
1615 word = {optimizers|target|warnings|undocumented|
1616 params|common|<language>} */
1626 { "optimizers", CL_OPTIMIZATION
},
1627 { "target", CL_TARGET
},
1628 { "warnings", CL_WARNING
},
1629 { "undocumented", CL_UNDOCUMENTED
},
1630 { "params", CL_PARAMS
},
1631 { "joined", CL_JOINED
},
1632 { "separate", CL_SEPARATE
},
1633 { "common", CL_COMMON
},
1636 unsigned int *pflags
;
1638 unsigned int lang_flag
, specific_flag
;
1647 error_at (loc
, "missing argument to %qs", "--help=^");
1650 pflags
= &exclude_flags
;
1653 pflags
= &include_flags
;
1655 comma
= strchr (a
, ',');
1666 /* Check to see if the string matches an option class name. */
1667 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1668 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1670 specific_flag
= specifics
[i
].flag
;
1674 /* Check to see if the string matches a language name.
1675 Note - we rely upon the alpha-sorted nature of the entries in
1676 the lang_names array, specifically that shorter names appear
1677 before their longer variants. (i.e. C before C++). That way
1678 when we are attempting to match --help=c for example we will
1679 match with C first and not C++. */
1680 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1681 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1683 lang_flag
= 1U << i
;
1687 if (specific_flag
!= 0)
1690 *pflags
|= specific_flag
;
1693 /* The option's argument matches both the start of a
1694 language name and the start of an option class name.
1695 We have a special case for when the user has
1696 specified "--help=c", but otherwise we have to issue
1698 if (strncasecmp (a
, "c", len
) == 0)
1699 *pflags
|= lang_flag
;
1702 "--help argument %q.*s is ambiguous, "
1703 "please be more specific",
1707 else if (lang_flag
!= 0)
1708 *pflags
|= lang_flag
;
1711 "unrecognized argument to --help= option: %q.*s",
1720 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1722 opts
->x_exit_after_options
= true;
1727 if (lang_mask
== CL_DRIVER
)
1730 opts
->x_exit_after_options
= true;
1733 case OPT_fsanitize_
:
1734 opts
->x_flag_sanitize
1735 = parse_sanitizer_options (arg
, loc
, code
,
1736 opts
->x_flag_sanitize
, value
, true);
1738 /* Kernel ASan implies normal ASan but does not yet support
1740 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1742 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1743 0, opts
->x_param_values
,
1744 opts_set
->x_param_values
);
1745 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1746 opts_set
->x_param_values
);
1747 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1748 opts_set
->x_param_values
);
1749 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1750 opts
->x_param_values
,
1751 opts_set
->x_param_values
);
1755 case OPT_fsanitize_recover_
:
1756 opts
->x_flag_sanitize_recover
1757 = parse_sanitizer_options (arg
, loc
, code
,
1758 opts
->x_flag_sanitize_recover
, value
, true);
1761 case OPT_fasan_shadow_offset_
:
1765 case OPT_fsanitize_recover
:
1767 opts
->x_flag_sanitize_recover
1768 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1770 opts
->x_flag_sanitize_recover
1771 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1778 /* Currently handled in a prescan. */
1782 dc
->warning_as_error_requested
= value
;
1786 if (lang_mask
== CL_DRIVER
)
1789 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1790 opts
, opts_set
, loc
, dc
);
1793 case OPT_Wlarger_than_
:
1794 opts
->x_larger_than_size
= value
;
1795 opts
->x_warn_larger_than
= value
!= -1;
1798 case OPT_Wfatal_errors
:
1799 dc
->fatal_errors
= value
;
1802 case OPT_Wframe_larger_than_
:
1803 opts
->x_frame_larger_than_size
= value
;
1804 opts
->x_warn_frame_larger_than
= value
!= -1;
1807 case OPT_Wstack_usage_
:
1808 opts
->x_warn_stack_usage
= value
;
1809 opts
->x_flag_stack_usage_info
= value
!= -1;
1812 case OPT_Wstrict_aliasing
:
1813 set_Wstrict_aliasing (opts
, value
);
1816 case OPT_Wstrict_overflow
:
1817 opts
->x_warn_strict_overflow
= (value
1818 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1822 case OPT_Wsystem_headers
:
1823 dc
->dc_warn_system_headers
= value
;
1827 opts
->x_flag_gen_aux_info
= 1;
1830 case OPT_auxbase_strip
:
1832 char *tmp
= xstrdup (arg
);
1833 strip_off_ending (tmp
, strlen (tmp
));
1835 opts
->x_aux_base_name
= tmp
;
1842 decode_d_option (arg
, opts
, loc
, dc
);
1845 case OPT_fcall_used_
:
1846 case OPT_fcall_saved_
:
1854 case OPT_fdbg_cnt_list
:
1856 opts
->x_exit_after_options
= true;
1859 case OPT_fdebug_prefix_map_
:
1863 case OPT_fdiagnostics_show_location_
:
1864 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1867 case OPT_fdiagnostics_show_caret
:
1868 dc
->show_caret
= value
;
1871 case OPT_fdiagnostics_color_
:
1872 diagnostic_color_init (dc
, value
);
1875 case OPT_fdiagnostics_parseable_fixits
:
1876 dc
->parseable_fixits_p
= value
;
1879 case OPT_fdiagnostics_show_option
:
1880 dc
->show_option_requested
= value
;
1887 case OPT_ffast_math
:
1888 set_fast_math_flags (opts
, value
);
1891 case OPT_funsafe_math_optimizations
:
1892 set_unsafe_math_optimizations_flags (opts
, value
);
1899 case OPT_finline_limit_
:
1900 set_param_value ("max-inline-insns-single", value
/ 2,
1901 opts
->x_param_values
, opts_set
->x_param_values
);
1902 set_param_value ("max-inline-insns-auto", value
/ 2,
1903 opts
->x_param_values
, opts_set
->x_param_values
);
1906 case OPT_finstrument_functions_exclude_function_list_
:
1907 add_comma_separated_to_vector
1908 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1911 case OPT_finstrument_functions_exclude_file_list_
:
1912 add_comma_separated_to_vector
1913 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1916 case OPT_fmessage_length_
:
1917 pp_set_line_maximum_length (dc
->printer
, value
);
1918 diagnostic_set_caret_max_width (dc
, value
);
1922 case OPT_fopt_info_
:
1928 const char *p
= arg
;
1929 opts
->x_flag_disable_hsa
= true;
1932 const char *comma
= strchr (p
, ',');
1934 if ((strncmp (p
, "disable", 7) == 0)
1935 && (p
[7] == ',' || p
[7] == '\0'))
1937 opts
->x_flag_disable_hsa
= true;
1941 if ((strncmp (p
, "hsa", 3) == 0)
1942 && (p
[3] == ',' || p
[3] == '\0'))
1945 opts
->x_flag_disable_hsa
= false;
1947 sorry ("HSA has not been enabled during configuration");
1957 #ifndef ACCEL_COMPILER
1958 case OPT_foffload_abi_
:
1959 error_at (loc
, "-foffload-abi option can be specified only for "
1960 "offload compiler");
1964 case OPT_fpack_struct_
:
1965 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1967 "structure alignment must be a small power of two, not %d",
1970 opts
->x_initial_max_fld_align
= value
;
1974 case OPT_fplugin_arg_
:
1978 case OPT_fprofile_use_
:
1979 opts
->x_profile_data_prefix
= xstrdup (arg
);
1980 opts
->x_flag_profile_use
= true;
1982 /* No break here - do -fprofile-use processing. */
1984 case OPT_fprofile_use
:
1985 enable_fdo_optimizations (opts
, opts_set
, value
);
1986 if (!opts_set
->x_flag_profile_reorder_functions
)
1987 opts
->x_flag_profile_reorder_functions
= value
;
1988 /* Indirect call profiling should do all useful transformations
1989 speculative devirtualization does. */
1990 if (!opts_set
->x_flag_devirtualize_speculatively
1991 && opts
->x_flag_value_profile_transformations
)
1992 opts
->x_flag_devirtualize_speculatively
= false;
1995 case OPT_fauto_profile_
:
1996 opts
->x_auto_profile_file
= xstrdup (arg
);
1997 opts
->x_flag_auto_profile
= true;
1999 /* No break here - do -fauto-profile processing. */
2001 case OPT_fauto_profile
:
2002 enable_fdo_optimizations (opts
, opts_set
, value
);
2003 if (!opts_set
->x_flag_profile_correction
)
2004 opts
->x_flag_profile_correction
= value
;
2005 maybe_set_param_value (
2006 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
2007 opts
->x_param_values
, opts_set
->x_param_values
);
2010 case OPT_fprofile_generate_
:
2011 opts
->x_profile_data_prefix
= xstrdup (arg
);
2013 /* No break here - do -fprofile-generate processing. */
2015 case OPT_fprofile_generate
:
2016 if (!opts_set
->x_profile_arc_flag
)
2017 opts
->x_profile_arc_flag
= value
;
2018 if (!opts_set
->x_flag_profile_values
)
2019 opts
->x_flag_profile_values
= value
;
2020 if (!opts_set
->x_flag_inline_functions
)
2021 opts
->x_flag_inline_functions
= value
;
2022 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2023 quadratic. Disable the pass until better memory representation
2025 if (!opts_set
->x_flag_ipa_reference
)
2026 opts
->x_flag_ipa_reference
= false;
2029 case OPT_ftree_vectorize
:
2030 if (!opts_set
->x_flag_tree_loop_vectorize
)
2031 opts
->x_flag_tree_loop_vectorize
= value
;
2032 if (!opts_set
->x_flag_tree_slp_vectorize
)
2033 opts
->x_flag_tree_slp_vectorize
= value
;
2035 case OPT_fshow_column
:
2036 dc
->show_column
= value
;
2039 case OPT_frandom_seed
:
2040 /* The real switch is -fno-random-seed. */
2046 case OPT_frandom_seed_
:
2050 case OPT_fsched_verbose_
:
2051 #ifdef INSN_SCHEDULING
2052 /* Handled with Var in common.opt. */
2058 case OPT_fsched_stalled_insns_
:
2059 opts
->x_flag_sched_stalled_insns
= value
;
2060 if (opts
->x_flag_sched_stalled_insns
== 0)
2061 opts
->x_flag_sched_stalled_insns
= -1;
2064 case OPT_fsched_stalled_insns_dep_
:
2065 opts
->x_flag_sched_stalled_insns_dep
= value
;
2068 case OPT_fstack_check_
:
2069 if (!strcmp (arg
, "no"))
2070 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2071 else if (!strcmp (arg
, "generic"))
2072 /* This is the old stack checking method. */
2073 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2074 ? FULL_BUILTIN_STACK_CHECK
2075 : GENERIC_STACK_CHECK
;
2076 else if (!strcmp (arg
, "specific"))
2077 /* This is the new stack checking method. */
2078 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2079 ? FULL_BUILTIN_STACK_CHECK
2080 : STACK_CHECK_STATIC_BUILTIN
2081 ? STATIC_BUILTIN_STACK_CHECK
2082 : GENERIC_STACK_CHECK
;
2084 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2087 case OPT_fstack_limit
:
2088 /* The real switch is -fno-stack-limit. */
2094 case OPT_fstack_limit_register_
:
2095 case OPT_fstack_limit_symbol_
:
2099 case OPT_fstack_usage
:
2100 opts
->x_flag_stack_usage
= value
;
2101 opts
->x_flag_stack_usage_info
= value
!= 0;
2105 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2110 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2114 if (arg
&& strlen (arg
) != 0)
2116 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2117 "use %<-gdwarf-%s%> for DWARF version "
2118 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2122 value
= opts
->x_dwarf_version
;
2126 if (value
< 2 || value
> 5)
2127 error_at (loc
, "dwarf version %d is not supported", value
);
2129 opts
->x_dwarf_version
= value
;
2130 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2133 case OPT_gsplit_dwarf
:
2134 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2139 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2144 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2149 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2154 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2160 /* Handled completely via specs. */
2163 case OPT_pedantic_errors
:
2164 dc
->pedantic_errors
= 1;
2165 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2167 handlers
, opts
, opts_set
,
2172 opts
->x_flag_lto
= value
? "" : NULL
;
2176 dc
->dc_inhibit_warnings
= true;
2179 case OPT_fmax_errors_
:
2180 dc
->max_errors
= value
;
2183 case OPT_fuse_ld_bfd
:
2184 case OPT_fuse_ld_gold
:
2185 case OPT_fuse_linker_plugin
:
2186 /* No-op. Used by the driver and passed to us because it starts with f.*/
2191 opts
->x_flag_trapv
= 0;
2196 opts
->x_flag_wrapv
= 0;
2200 opts
->x_flag_ipa_icf_functions
= value
;
2201 opts
->x_flag_ipa_icf_variables
= value
;
2205 /* If the flag was handled in a standard way, assume the lack of
2206 processing here is intentional. */
2207 gcc_assert (option_flag_var (scode
, opts
));
2211 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2216 /* Handle --param NAME=VALUE. */
2218 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2219 location_t loc
, const char *carg
)
2224 arg
= xstrdup (carg
);
2225 equal
= strchr (arg
, '=');
2227 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2233 enum compiler_param index
;
2234 if (!find_param (arg
, &index
))
2236 const char *suggestion
= find_param_fuzzy (arg
);
2238 error_at (loc
, "invalid --param name %qs; did you mean %qs?",
2241 error_at (loc
, "invalid --param name %qs", arg
);
2245 if (!param_string_value_p (index
, equal
+ 1, &value
))
2246 value
= integral_argument (equal
+ 1);
2249 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2251 set_param_value (arg
, value
,
2252 opts
->x_param_values
, opts_set
->x_param_values
);
2259 /* Used to set the level of strict aliasing warnings in OPTS,
2260 when no level is specified (i.e., when -Wstrict-aliasing, and not
2261 -Wstrict-aliasing=level was given).
2262 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2263 and 0 otherwise. After calling this function, wstrict_aliasing will be
2264 set to the default value of -Wstrict_aliasing=level, currently 3. */
2266 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2268 gcc_assert (onoff
== 0 || onoff
== 1);
2270 opts
->x_warn_strict_aliasing
= 3;
2272 opts
->x_warn_strict_aliasing
= 0;
2275 /* The following routines are useful in setting all the flags that
2276 -ffast-math and -fno-fast-math imply. */
2278 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2280 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2282 opts
->x_flag_unsafe_math_optimizations
= set
;
2283 set_unsafe_math_optimizations_flags (opts
, set
);
2285 if (!opts
->frontend_set_flag_finite_math_only
)
2286 opts
->x_flag_finite_math_only
= set
;
2287 if (!opts
->frontend_set_flag_errno_math
)
2288 opts
->x_flag_errno_math
= !set
;
2291 if (!opts
->frontend_set_flag_signaling_nans
)
2292 opts
->x_flag_signaling_nans
= 0;
2293 if (!opts
->frontend_set_flag_rounding_math
)
2294 opts
->x_flag_rounding_math
= 0;
2295 if (!opts
->frontend_set_flag_cx_limited_range
)
2296 opts
->x_flag_cx_limited_range
= 1;
2300 /* When -funsafe-math-optimizations is set the following
2301 flags are set as well. */
2303 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2305 if (!opts
->frontend_set_flag_trapping_math
)
2306 opts
->x_flag_trapping_math
= !set
;
2307 if (!opts
->frontend_set_flag_signed_zeros
)
2308 opts
->x_flag_signed_zeros
= !set
;
2309 if (!opts
->frontend_set_flag_associative_math
)
2310 opts
->x_flag_associative_math
= set
;
2311 if (!opts
->frontend_set_flag_reciprocal_math
)
2312 opts
->x_flag_reciprocal_math
= set
;
2315 /* Return true iff flags in OPTS are set as if -ffast-math. */
2317 fast_math_flags_set_p (const struct gcc_options
*opts
)
2319 return (!opts
->x_flag_trapping_math
2320 && opts
->x_flag_unsafe_math_optimizations
2321 && opts
->x_flag_finite_math_only
2322 && !opts
->x_flag_signed_zeros
2323 && !opts
->x_flag_errno_math
);
2326 /* Return true iff flags are set as if -ffast-math but using the flags stored
2327 in the struct cl_optimization structure. */
2329 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2331 return (!opt
->x_flag_trapping_math
2332 && opt
->x_flag_unsafe_math_optimizations
2333 && opt
->x_flag_finite_math_only
2334 && !opt
->x_flag_signed_zeros
2335 && !opt
->x_flag_errno_math
);
2338 /* Handle a debug output -g switch for options OPTS
2339 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2340 explicitly), location LOC. EXTENDED is true or false to support
2341 extended output (2 is special and means "-ggdb" was given). */
2343 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2344 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2347 opts
->x_use_gnu_debug_info_extensions
= extended
;
2349 if (type
== NO_DEBUG
)
2351 if (opts
->x_write_symbols
== NO_DEBUG
)
2353 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2357 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2358 opts
->x_write_symbols
= DWARF2_DEBUG
;
2359 #elif defined DBX_DEBUGGING_INFO
2360 opts
->x_write_symbols
= DBX_DEBUG
;
2364 if (opts
->x_write_symbols
== NO_DEBUG
)
2365 warning_at (loc
, 0, "target system does not support debug output");
2370 /* Does it conflict with an already selected type? */
2371 if (opts_set
->x_write_symbols
!= NO_DEBUG
2372 && opts
->x_write_symbols
!= NO_DEBUG
2373 && type
!= opts
->x_write_symbols
)
2374 error_at (loc
, "debug format %qs conflicts with prior selection",
2375 debug_type_names
[type
]);
2376 opts
->x_write_symbols
= type
;
2377 opts_set
->x_write_symbols
= type
;
2380 /* A debug flag without a level defaults to level 2.
2381 If off or at level 1, set it to level 2, but if already
2382 at level 3, don't lower it. */
2385 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2386 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2390 int argval
= integral_argument (arg
);
2392 error_at (loc
, "unrecognised debug output level %qs", arg
);
2393 else if (argval
> 3)
2394 error_at (loc
, "debug output level %qs is too high", arg
);
2396 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2400 /* Arrange to dump core on error for diagnostic context DC. (The
2401 regular error message is still printed first, except in the case of
2405 setup_core_dumping (diagnostic_context
*dc
)
2408 signal (SIGABRT
, SIG_DFL
);
2410 #if defined(HAVE_SETRLIMIT)
2413 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2414 fatal_error (input_location
, "getting core file size maximum limit: %m");
2415 rlim
.rlim_cur
= rlim
.rlim_max
;
2416 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2417 fatal_error (input_location
,
2418 "setting core file size limit to maximum: %m");
2421 diagnostic_abort_on_error (dc
);
2424 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2425 diagnostic context DC. */
2428 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2429 location_t loc
, diagnostic_context
*dc
)
2437 opts
->x_flag_debug_asm
= 1;
2440 opts
->x_flag_print_asm_name
= 1;
2443 opts
->x_flag_dump_rtl_in_asm
= 1;
2444 opts
->x_flag_print_asm_name
= 1;
2447 opts
->x_rtl_dump_and_exit
= 1;
2449 case 'D': /* These are handled by the preprocessor. */
2456 setup_core_dumping (dc
);
2459 opts
->x_flag_dump_all_passed
= true;
2463 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2468 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2469 mask LANG_MASK, option handlers HANDLERS) as an error for option
2470 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2471 NULL), location LOC. This is used by -Werror=. */
2474 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2475 const struct cl_option_handlers
*handlers
,
2476 struct gcc_options
*opts
,
2477 struct gcc_options
*opts_set
,
2478 location_t loc
, diagnostic_context
*dc
)
2483 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2484 new_option
[0] = 'W';
2485 strcpy (new_option
+ 1, arg
);
2486 option_index
= find_opt (new_option
, lang_mask
);
2487 if (option_index
== OPT_SPECIAL_unknown
)
2488 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2489 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2490 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2494 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2495 const char *arg
= NULL
;
2497 if (cl_options
[option_index
].flags
& CL_JOINED
)
2498 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2499 control_warning_option (option_index
, (int) kind
, arg
, value
,
2501 handlers
, opts
, opts_set
, dc
);
2506 /* Return malloced memory for the name of the option OPTION_INDEX
2507 which enabled a diagnostic (context CONTEXT), originally of type
2508 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2512 option_name (diagnostic_context
*context
, int option_index
,
2513 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2517 /* A warning classified as an error. */
2518 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2519 && diag_kind
== DK_ERROR
)
2520 return concat (cl_options
[OPT_Werror_
].opt_text
,
2521 /* Skip over "-W". */
2522 cl_options
[option_index
].opt_text
+ 2,
2524 /* A warning with option. */
2526 return xstrdup (cl_options
[option_index
].opt_text
);
2528 /* A warning without option classified as an error. */
2529 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2530 || diag_kind
== DK_WARNING
)
2531 && context
->warning_as_error_requested
)
2532 return xstrdup (cl_options
[OPT_Werror
].opt_text
);