1 /* Command line option handling.
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "diagnostic.h"
30 #include "opts-diagnostic.h"
31 #include "insn-attr-common.h"
32 #include "common/common-target.h"
33 #include "spellcheck.h"
35 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
37 /* Indexed by enum debug_info_type. */
38 const char *const debug_type_names
[] =
40 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
43 /* Parse the -femit-struct-debug-detailed option value
44 and set the flag variables. */
46 #define MATCH( prefix, string ) \
47 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
48 ? ((string += sizeof prefix - 1), 1) : 0)
51 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
54 /* various labels for comparison */
55 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
56 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
57 static const char none_lbl
[] = "none", any_lbl
[] = "any";
58 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
60 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
61 /* Default is to apply to as much as possible. */
62 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
66 if (MATCH (dfn_lbl
, spec
))
67 usage
= DINFO_USAGE_DFN
;
68 else if (MATCH (dir_lbl
, spec
))
69 usage
= DINFO_USAGE_DIR_USE
;
70 else if (MATCH (ind_lbl
, spec
))
71 usage
= DINFO_USAGE_IND_USE
;
73 /* Generics or not? */
74 if (MATCH (ord_lbl
, spec
))
76 else if (MATCH (gen_lbl
, spec
))
79 /* What allowable environment? */
80 if (MATCH (none_lbl
, spec
))
81 files
= DINFO_STRUCT_FILE_NONE
;
82 else if (MATCH (any_lbl
, spec
))
83 files
= DINFO_STRUCT_FILE_ANY
;
84 else if (MATCH (sys_lbl
, spec
))
85 files
= DINFO_STRUCT_FILE_SYS
;
86 else if (MATCH (base_lbl
, spec
))
87 files
= DINFO_STRUCT_FILE_BASE
;
90 "argument %qs to %<-femit-struct-debug-detailed%> "
94 /* Effect the specification. */
95 if (usage
== DINFO_USAGE_NUM_ENUMS
)
99 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
101 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
105 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
107 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
113 opts
->x_debug_struct_ordinary
[usage
] = files
;
115 opts
->x_debug_struct_generic
[usage
] = files
;
119 set_struct_debug_option (opts
, loc
, spec
+1);
122 /* No more -femit-struct-debug-detailed specifications.
126 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
128 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
129 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
130 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
131 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
133 "%<-femit-struct-debug-detailed=dir:...%> must allow "
134 "at least as much as "
135 "%<-femit-struct-debug-detailed=ind:...%>");
139 /* Strip off a legitimate source ending from the input string NAME of
140 length LEN. Rather than having to know the names used by all of
141 our front ends, we strip off an ending of a period followed by
142 up to five characters. (Java uses ".class".) */
145 strip_off_ending (char *name
, int len
)
148 for (i
= 2; i
< 6 && len
> i
; i
++)
150 if (name
[len
- i
] == '.')
152 name
[len
- i
] = '\0';
158 /* Find the base name of a path, stripping off both directories and
159 a single final extension. */
161 base_of_path (const char *path
, const char **base_out
)
163 const char *base
= path
;
165 const char *p
= path
;
169 if (IS_DIR_SEPARATOR (c
))
184 /* What to print when a switch has no documentation. */
185 static const char undocumented_msg
[] = N_("This option lacks documentation.");
186 static const char use_diagnosed_msg
[] = N_("Uses of this option are diagnosed.");
188 typedef char *char_p
; /* For DEF_VEC_P. */
190 static void handle_param (struct gcc_options
*opts
,
191 struct gcc_options
*opts_set
, location_t loc
,
193 static void set_debug_level (enum debug_info_type type
, int extended
,
194 const char *arg
, struct gcc_options
*opts
,
195 struct gcc_options
*opts_set
,
197 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
198 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
199 location_t loc
, diagnostic_context
*dc
);
200 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
202 static void enable_warning_as_error (const char *arg
, int value
,
203 unsigned int lang_mask
,
204 const struct cl_option_handlers
*handlers
,
205 struct gcc_options
*opts
,
206 struct gcc_options
*opts_set
,
208 diagnostic_context
*dc
);
210 /* Handle a back-end option; arguments and return value as for
214 target_handle_option (struct gcc_options
*opts
,
215 struct gcc_options
*opts_set
,
216 const struct cl_decoded_option
*decoded
,
217 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
219 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
220 diagnostic_context
*dc
)
222 gcc_assert (dc
== global_dc
);
223 gcc_assert (kind
== DK_UNSPECIFIED
);
224 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
227 /* Add comma-separated strings to a char_p vector. */
230 add_comma_separated_to_vector (void **pvec
, const char *arg
)
236 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
238 vec_check_alloc (v
, 1);
240 /* We never free this string. */
253 v
->safe_push (token_start
);
256 if (*r
== '\\' && r
[1] == ',')
264 if (*token_start
!= '\0')
265 v
->safe_push (token_start
);
270 /* Initialize opts_obstack. */
273 init_opts_obstack (void)
275 gcc_obstack_init (&opts_obstack
);
278 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
281 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
283 size_t num_params
= get_num_compiler_params ();
285 /* Ensure that opts_obstack has already been initialized by the time
286 that we initialize any gcc_options instances (PR jit/68446). */
287 gcc_assert (opts_obstack
.chunk_size
> 0);
289 *opts
= global_options_init
;
292 memset (opts_set
, 0, sizeof (*opts_set
));
294 opts
->x_param_values
= XNEWVEC (int, num_params
);
297 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
299 init_param_values (opts
->x_param_values
);
301 /* Initialize whether `char' is signed. */
302 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
303 /* Set this to a special "uninitialized" value. The actual default
304 is set after target options have been processed. */
305 opts
->x_flag_short_enums
= 2;
307 /* Initialize target_flags before default_options_optimization
308 so the latter can modify it. */
309 opts
->x_target_flags
= targetm_common
.default_target_flags
;
311 /* Some targets have ABI-specified unwind tables. */
312 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
314 /* Some targets have other target-specific initialization. */
315 targetm_common
.option_init_struct (opts
);
318 /* Release any allocations owned by OPTS. */
321 finalize_options_struct (struct gcc_options
*opts
)
323 XDELETEVEC (opts
->x_param_values
);
326 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
327 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
328 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
329 mask LANG_MASK and option handlers HANDLERS. */
332 maybe_default_option (struct gcc_options
*opts
,
333 struct gcc_options
*opts_set
,
334 const struct default_options
*default_opt
,
335 int level
, bool size
, bool fast
, bool debug
,
336 unsigned int lang_mask
,
337 const struct cl_option_handlers
*handlers
,
339 diagnostic_context
*dc
)
341 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
345 gcc_assert (level
== 2);
347 gcc_assert (level
== 3);
349 gcc_assert (level
== 1);
351 switch (default_opt
->levels
)
357 case OPT_LEVELS_0_ONLY
:
358 enabled
= (level
== 0);
361 case OPT_LEVELS_1_PLUS
:
362 enabled
= (level
>= 1);
365 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
366 enabled
= (level
>= 1 && !size
&& !debug
);
369 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
370 enabled
= (level
>= 1 && !debug
);
373 case OPT_LEVELS_2_PLUS
:
374 enabled
= (level
>= 2);
377 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
378 enabled
= (level
>= 2 && !size
&& !debug
);
381 case OPT_LEVELS_3_PLUS
:
382 enabled
= (level
>= 3);
385 case OPT_LEVELS_3_PLUS_AND_SIZE
:
386 enabled
= (level
>= 3 || size
);
389 case OPT_LEVELS_SIZE
:
393 case OPT_LEVELS_FAST
:
397 case OPT_LEVELS_NONE
:
403 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
404 default_opt
->arg
, default_opt
->value
,
405 lang_mask
, DK_UNSPECIFIED
, loc
,
407 else if (default_opt
->arg
== NULL
408 && !option
->cl_reject_negative
)
409 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
410 default_opt
->arg
, !default_opt
->value
,
411 lang_mask
, DK_UNSPECIFIED
, loc
,
415 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
416 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
417 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
418 language mask LANG_MASK and option handlers HANDLERS. */
421 maybe_default_options (struct gcc_options
*opts
,
422 struct gcc_options
*opts_set
,
423 const struct default_options
*default_opts
,
424 int level
, bool size
, bool fast
, bool debug
,
425 unsigned int lang_mask
,
426 const struct cl_option_handlers
*handlers
,
428 diagnostic_context
*dc
)
432 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
433 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
434 level
, size
, fast
, debug
,
435 lang_mask
, handlers
, loc
, dc
);
438 /* Table of options enabled by default at different levels. */
440 static const struct default_options default_options_table
[] =
442 /* -O1 optimizations. */
443 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS
, OPT_ftree_coalesce_vars
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
465 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
466 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
467 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
468 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
469 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
470 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
471 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
472 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
473 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
474 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
475 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
476 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
477 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
478 { OPT_LEVELS_1_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
480 /* -O2 optimizations. */
481 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
493 #ifdef INSN_SCHEDULING
494 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
495 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_freorder_blocks_algorithm_
, NULL
,
500 REORDER_BLOCKS_ALGORITHM_STC
},
501 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
503 { OPT_LEVELS_2_PLUS
, OPT_fcode_hoisting
, NULL
, 1 },
504 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
505 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
506 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
507 { OPT_LEVELS_2_PLUS
, OPT_fipa_bit_cp
, NULL
, 1 },
508 { OPT_LEVELS_2_PLUS
, OPT_fipa_vrp
, NULL
, 1 },
509 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
510 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
511 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
512 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
513 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
514 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
515 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
516 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
517 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
518 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
519 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
520 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
521 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
522 { OPT_LEVELS_2_PLUS
, OPT_fipa_ra
, NULL
, 1 },
523 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
524 { OPT_LEVELS_2_PLUS
, OPT_fstore_merging
, NULL
, 1 },
526 /* -O3 optimizations. */
527 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
528 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
529 { OPT_LEVELS_3_PLUS
, OPT_fsplit_paths
, NULL
, 1 },
530 /* Inlining of functions reducing size is a good idea with -Os
531 regardless of them being declared inline. */
532 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
533 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
534 { OPT_LEVELS_3_PLUS
, OPT_fsplit_loops
, NULL
, 1 },
535 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
536 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
537 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
538 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
539 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
540 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
541 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
542 { OPT_LEVELS_3_PLUS
, OPT_fpeel_loops
, NULL
, 1 },
544 /* -Ofast adds optimizations to -O3. */
545 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
547 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
550 /* Default the options in OPTS and OPTS_SET based on the optimization
551 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
553 default_options_optimization (struct gcc_options
*opts
,
554 struct gcc_options
*opts_set
,
555 struct cl_decoded_option
*decoded_options
,
556 unsigned int decoded_options_count
,
558 unsigned int lang_mask
,
559 const struct cl_option_handlers
*handlers
,
560 diagnostic_context
*dc
)
564 bool openacc_mode
= false;
566 /* Scan to see what optimization level has been specified. That will
567 determine the default value of many flags. */
568 for (i
= 1; i
< decoded_options_count
; i
++)
570 struct cl_decoded_option
*opt
= &decoded_options
[i
];
571 switch (opt
->opt_index
)
574 if (*opt
->arg
== '\0')
576 opts
->x_optimize
= 1;
577 opts
->x_optimize_size
= 0;
578 opts
->x_optimize_fast
= 0;
579 opts
->x_optimize_debug
= 0;
583 const int optimize_val
= integral_argument (opt
->arg
);
584 if (optimize_val
== -1)
585 error_at (loc
, "argument to %<-O%> should be a non-negative "
586 "integer, %<g%>, %<s%> or %<fast%>");
589 opts
->x_optimize
= optimize_val
;
590 if ((unsigned int) opts
->x_optimize
> 255)
591 opts
->x_optimize
= 255;
592 opts
->x_optimize_size
= 0;
593 opts
->x_optimize_fast
= 0;
594 opts
->x_optimize_debug
= 0;
600 opts
->x_optimize_size
= 1;
602 /* Optimizing for size forces optimize to be 2. */
603 opts
->x_optimize
= 2;
604 opts
->x_optimize_fast
= 0;
605 opts
->x_optimize_debug
= 0;
609 /* -Ofast only adds flags to -O3. */
610 opts
->x_optimize_size
= 0;
611 opts
->x_optimize
= 3;
612 opts
->x_optimize_fast
= 1;
613 opts
->x_optimize_debug
= 0;
617 /* -Og selects optimization level 1. */
618 opts
->x_optimize_size
= 0;
619 opts
->x_optimize
= 1;
620 opts
->x_optimize_fast
= 0;
621 opts
->x_optimize_debug
= 1;
630 /* Ignore other options in this prescan. */
635 maybe_default_options (opts
, opts_set
, default_options_table
,
636 opts
->x_optimize
, opts
->x_optimize_size
,
637 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
638 lang_mask
, handlers
, loc
, dc
);
640 /* -O2 param settings. */
641 opt2
= (opts
->x_optimize
>= 2);
644 && !opts_set
->x_flag_ipa_pta
)
645 opts
->x_flag_ipa_pta
= true;
647 /* Track fields in field-sensitive alias analysis. */
648 maybe_set_param_value
649 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
650 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
651 opts
->x_param_values
, opts_set
->x_param_values
);
653 /* For -O1 only do loop invariant motion for very small loops. */
654 maybe_set_param_value
655 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
656 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
657 opts
->x_param_values
, opts_set
->x_param_values
);
659 /* At -Ofast, allow store motion to introduce potential race conditions. */
660 maybe_set_param_value
661 (PARAM_ALLOW_STORE_DATA_RACES
,
662 opts
->x_optimize_fast
? 1
663 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
664 opts
->x_param_values
, opts_set
->x_param_values
);
666 if (opts
->x_optimize_size
)
667 /* We want to crossjump as much as possible. */
668 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
669 opts
->x_param_values
, opts_set
->x_param_values
);
671 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
672 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
673 opts
->x_param_values
, opts_set
->x_param_values
);
675 /* Restrict the amount of work combine does at -Og while retaining
676 most of its useful transforms. */
677 if (opts
->x_optimize_debug
)
678 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
679 opts
->x_param_values
, opts_set
->x_param_values
);
681 /* Allow default optimizations to be specified on a per-machine basis. */
682 maybe_default_options (opts
, opts_set
,
683 targetm_common
.option_optimization_table
,
684 opts
->x_optimize
, opts
->x_optimize_size
,
685 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
686 lang_mask
, handlers
, loc
, dc
);
689 /* After all options at LOC have been read into OPTS and OPTS_SET,
690 finalize settings of those options and diagnose incompatible
693 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
696 enum unwind_info_type ui_except
;
698 if (opts
->x_dump_base_name
699 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
700 && ! opts
->x_dump_base_name_prefixed
)
702 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
703 OPTS->X_DUMP_DIR_NAME directory. Then try to make
704 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
705 directory, typically the directory to contain the object
707 if (opts
->x_dump_dir_name
)
708 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
709 opts
->x_dump_base_name
, NULL
);
710 else if (opts
->x_aux_base_name
711 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
713 const char *aux_base
;
715 base_of_path (opts
->x_aux_base_name
, &aux_base
);
716 if (opts
->x_aux_base_name
!= aux_base
)
718 int dir_len
= aux_base
- opts
->x_aux_base_name
;
719 char *new_dump_base_name
720 = XOBNEWVEC (&opts_obstack
, char,
721 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
723 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
724 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
725 /* Append existing OPTS->X_DUMP_BASE_NAME. */
726 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
727 opts
->x_dump_base_name
= new_dump_base_name
;
730 opts
->x_dump_base_name_prefixed
= true;
733 /* Handle related options for unit-at-a-time, toplevel-reorder, and
735 if (!opts
->x_flag_unit_at_a_time
)
737 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
738 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
740 opts
->x_flag_section_anchors
= 0;
741 if (opts
->x_flag_toplevel_reorder
== 1)
742 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
744 opts
->x_flag_toplevel_reorder
= 0;
747 /* -fself-test depends on the state of the compiler prior to
748 compiling anything. Ideally it should be run on an empty source
749 file. However, in case we get run with actual source, assume
750 -fsyntax-only which will inhibit any compiler initialization
751 which may confuse the self tests. */
752 if (opts
->x_flag_self_test
)
753 opts
->x_flag_syntax_only
= 1;
755 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
756 sorry ("transactional memory is not supported with non-call exceptions");
758 /* Unless the user has asked for section anchors, we disable toplevel
759 reordering at -O0 to disable transformations that might be surprising
760 to end users and to get -fno-toplevel-reorder tested. */
761 if (!opts
->x_optimize
762 && opts
->x_flag_toplevel_reorder
== 2
763 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
765 opts
->x_flag_toplevel_reorder
= 0;
766 opts
->x_flag_section_anchors
= 0;
768 if (!opts
->x_flag_toplevel_reorder
)
770 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
771 error_at (loc
, "section anchors must be disabled when toplevel reorder"
773 opts
->x_flag_section_anchors
= 0;
776 if (!opts
->x_flag_opts_finished
)
778 /* We initialize opts->x_flag_pie to -1 so that targets can set a
780 if (opts
->x_flag_pie
== -1)
782 /* We initialize opts->x_flag_pic to -1 so that we can tell if
783 -fpic, -fPIC, -fno-pic or -fno-PIC is used. */
784 if (opts
->x_flag_pic
== -1)
785 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
787 opts
->x_flag_pie
= 0;
789 /* If -fPIE or -fpie is used, turn on PIC. */
790 if (opts
->x_flag_pie
)
791 opts
->x_flag_pic
= opts
->x_flag_pie
;
792 else if (opts
->x_flag_pic
== -1)
793 opts
->x_flag_pic
= 0;
794 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
795 opts
->x_flag_shlib
= 1;
796 opts
->x_flag_opts_finished
= true;
799 /* We initialize opts->x_flag_stack_protect to -1 so that targets
800 can set a default value. */
801 if (opts
->x_flag_stack_protect
== -1)
802 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
804 if (opts
->x_optimize
== 0)
806 /* Inlining does not work if not optimizing,
807 so force it not to be done. */
808 opts
->x_warn_inline
= 0;
809 opts
->x_flag_no_inline
= 1;
812 /* The optimization to partition hot and cold basic blocks into separate
813 sections of the .o and executable files does not work (currently)
814 with exception handling. This is because there is no support for
815 generating unwind info. If opts->x_flag_exceptions is turned on
816 we need to turn off the partitioning optimization. */
818 ui_except
= targetm_common
.except_unwind_info (opts
);
820 if (opts
->x_flag_exceptions
821 && opts
->x_flag_reorder_blocks_and_partition
822 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
824 if (opts_set
->x_flag_reorder_blocks_and_partition
)
826 "-freorder-blocks-and-partition does not work "
827 "with exceptions on this architecture");
828 opts
->x_flag_reorder_blocks_and_partition
= 0;
829 opts
->x_flag_reorder_blocks
= 1;
832 /* If user requested unwind info, then turn off the partitioning
835 if (opts
->x_flag_unwind_tables
836 && !targetm_common
.unwind_tables_default
837 && opts
->x_flag_reorder_blocks_and_partition
838 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
840 if (opts_set
->x_flag_reorder_blocks_and_partition
)
842 "-freorder-blocks-and-partition does not support "
843 "unwind info on this architecture");
844 opts
->x_flag_reorder_blocks_and_partition
= 0;
845 opts
->x_flag_reorder_blocks
= 1;
848 /* If the target requested unwind info, then turn off the partitioning
849 optimization with a different message. Likewise, if the target does not
850 support named sections. */
852 if (opts
->x_flag_reorder_blocks_and_partition
853 && (!targetm_common
.have_named_sections
854 || (opts
->x_flag_unwind_tables
855 && targetm_common
.unwind_tables_default
856 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
858 if (opts_set
->x_flag_reorder_blocks_and_partition
)
860 "-freorder-blocks-and-partition does not work "
861 "on this architecture");
862 opts
->x_flag_reorder_blocks_and_partition
= 0;
863 opts
->x_flag_reorder_blocks
= 1;
867 /* Pipelining of outer loops is only possible when general pipelining
868 capabilities are requested. */
869 if (!opts
->x_flag_sel_sched_pipelining
)
870 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
872 if (opts
->x_flag_conserve_stack
)
874 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
875 opts
->x_param_values
, opts_set
->x_param_values
);
876 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
877 opts
->x_param_values
, opts_set
->x_param_values
);
880 if (opts
->x_flag_lto
)
883 opts
->x_flag_generate_lto
= 1;
885 /* When generating IL, do not operate in whole-program mode.
886 Otherwise, symbols will be privatized too early, causing link
888 opts
->x_flag_whole_program
= 0;
890 error_at (loc
, "LTO support has not been enabled in this configuration");
892 if (!opts
->x_flag_fat_lto_objects
894 || (opts_set
->x_flag_use_linker_plugin
895 && !opts
->x_flag_use_linker_plugin
)))
897 if (opts_set
->x_flag_fat_lto_objects
)
898 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
899 opts
->x_flag_fat_lto_objects
= 1;
903 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
904 default value if they choose based on other options. */
905 if (opts
->x_flag_split_stack
== -1)
906 opts
->x_flag_split_stack
= 0;
907 else if (opts
->x_flag_split_stack
)
909 if (!targetm_common
.supports_split_stack (true, opts
))
911 error_at (loc
, "%<-fsplit-stack%> is not supported by "
912 "this compiler configuration");
913 opts
->x_flag_split_stack
= 0;
917 /* If stack splitting is turned on, and the user did not explicitly
918 request function partitioning, turn off partitioning, as it
919 confuses the linker when trying to handle partitioned split-stack
920 code that calls a non-split-stack functions. But if partitioning
921 was turned on explicitly just hope for the best. */
922 if (opts
->x_flag_split_stack
923 && opts
->x_flag_reorder_blocks_and_partition
924 && !opts_set
->x_flag_reorder_blocks_and_partition
)
925 opts
->x_flag_reorder_blocks_and_partition
= 0;
927 if (opts
->x_flag_reorder_blocks_and_partition
928 && !opts_set
->x_flag_reorder_functions
)
929 opts
->x_flag_reorder_functions
= 1;
931 /* Tune vectorization related parametees according to cost model. */
932 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
934 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
935 6, opts
->x_param_values
, opts_set
->x_param_values
);
936 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
937 0, opts
->x_param_values
, opts_set
->x_param_values
);
938 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
939 0, opts
->x_param_values
, opts_set
->x_param_values
);
942 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
944 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
945 || !opts
->x_flag_tree_loop_if_convert
)
946 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
947 opts
->x_param_values
, opts_set
->x_param_values
);
949 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
950 if (opts
->x_dwarf_split_debug_info
)
951 opts
->x_debug_generate_pub_sections
= 2;
953 /* Userspace and kernel ASan conflict with each other. */
954 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
955 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
957 "-fsanitize=address is incompatible with "
958 "-fsanitize=kernel-address");
961 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
962 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
964 "-fsanitize=address and -fsanitize=kernel-address "
965 "are incompatible with -fsanitize=thread");
967 if ((opts
->x_flag_sanitize
& SANITIZE_LEAK
)
968 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
970 "-fsanitize=leak is incompatible with -fsanitize=thread");
972 /* Check error recovery for -fsanitize-recover option. */
973 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
974 if ((opts
->x_flag_sanitize_recover
& sanitizer_opts
[i
].flag
)
975 && !sanitizer_opts
[i
].can_recover
)
976 error_at (loc
, "-fsanitize-recover=%s is not supported",
977 sanitizer_opts
[i
].name
);
979 /* When instrumenting the pointers, we don't want to remove
980 the null pointer checks. */
981 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
982 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
983 opts
->x_flag_delete_null_pointer_checks
= 0;
985 /* Aggressive compiler optimizations may cause false negatives. */
986 if (opts
->x_flag_sanitize
& ~(SANITIZE_LEAK
| SANITIZE_UNREACHABLE
))
987 opts
->x_flag_aggressive_loop_optimizations
= 0;
989 /* Enable -fsanitize-address-use-after-scope if address sanitizer is
991 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
992 && !opts_set
->x_flag_sanitize_address_use_after_scope
)
993 opts
->x_flag_sanitize_address_use_after_scope
= true;
995 /* Force -fstack-reuse=none in case -fsanitize-address-use-after-scope
997 if (opts
->x_flag_sanitize_address_use_after_scope
)
999 if (opts
->x_flag_stack_reuse
!= SR_NONE
1000 && opts_set
->x_flag_stack_reuse
!= SR_NONE
)
1002 "-fsanitize-address-use-after-scope requires "
1003 "-fstack-reuse=none option");
1005 opts
->x_flag_stack_reuse
= SR_NONE
;
1009 #define LEFT_COLUMN 27
1011 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1012 followed by word-wrapped HELP in a second column. */
1014 wrap_help (const char *help
,
1016 unsigned int item_width
,
1017 unsigned int columns
)
1019 unsigned int col_width
= LEFT_COLUMN
;
1020 unsigned int remaining
, room
, len
;
1022 remaining
= strlen (help
);
1026 room
= columns
- 3 - MAX (col_width
, item_width
);
1035 for (i
= 0; help
[i
]; i
++)
1037 if (i
>= room
&& len
!= remaining
)
1041 else if ((help
[i
] == '-' || help
[i
] == '/')
1042 && help
[i
+ 1] != ' '
1043 && i
> 0 && ISALPHA (help
[i
- 1]))
1048 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1050 while (help
[len
] == ' ')
1058 /* Print help for a specific front-end, etc. */
1060 print_filtered_help (unsigned int include_flags
,
1061 unsigned int exclude_flags
,
1062 unsigned int any_flags
,
1063 unsigned int columns
,
1064 struct gcc_options
*opts
,
1065 unsigned int lang_mask
)
1070 bool displayed
= false;
1073 if (include_flags
== CL_PARAMS
)
1075 for (i
= 0; i
< LAST_PARAM
; i
++)
1077 const char *param
= compiler_params
[i
].option
;
1079 help
= compiler_params
[i
].help
;
1080 if (help
== NULL
|| *help
== '\0')
1082 if (exclude_flags
& CL_UNDOCUMENTED
)
1084 help
= undocumented_msg
;
1087 /* Get the translation. */
1090 if (!opts
->x_quiet_flag
)
1092 snprintf (new_help
, sizeof (new_help
),
1093 _("default %d minimum %d maximum %d"),
1094 compiler_params
[i
].default_value
,
1095 compiler_params
[i
].min_value
,
1096 compiler_params
[i
].max_value
);
1099 wrap_help (help
, param
, strlen (param
), columns
);
1105 if (!opts
->x_help_printed
)
1106 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1108 if (!opts
->x_help_enum_printed
)
1109 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1111 for (i
= 0; i
< cl_options_count
; i
++)
1113 const struct cl_option
*option
= cl_options
+ i
;
1118 if (include_flags
== 0
1119 || ((option
->flags
& include_flags
) != include_flags
))
1121 if ((option
->flags
& any_flags
) == 0)
1125 /* Skip unwanted switches. */
1126 if ((option
->flags
& exclude_flags
) != 0)
1129 /* The driver currently prints its own help text. */
1130 if ((option
->flags
& CL_DRIVER
) != 0
1131 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1132 | CL_COMMON
| CL_TARGET
)) == 0)
1136 /* Skip switches that have already been printed. */
1137 if (opts
->x_help_printed
[i
])
1140 opts
->x_help_printed
[i
] = true;
1142 help
= option
->help
;
1145 if (exclude_flags
& CL_UNDOCUMENTED
)
1148 help
= undocumented_msg
;
1151 if (option
->alias_target
< N_OPTS
1152 && cl_options
[option
->alias_target
].help
)
1154 if (help
== undocumented_msg
)
1156 /* For undocumented options that are aliases for other options
1157 that are documented, point the reader to the other option in
1158 preference of the former. */
1159 snprintf (new_help
, sizeof new_help
,
1160 _("Same as %s. Use the latter option instead."),
1161 cl_options
[option
->alias_target
].opt_text
);
1165 /* For documented options with aliases, mention the aliased
1166 option's name for reference. */
1167 snprintf (new_help
, sizeof new_help
,
1168 _("%s Same as %s."),
1169 help
, cl_options
[option
->alias_target
].opt_text
);
1175 if (option
->warn_message
)
1177 /* Mention that the use of the option will trigger a warning. */
1178 if (help
== new_help
)
1179 snprintf (new_help
+ strlen (new_help
),
1180 sizeof new_help
- strlen (new_help
),
1181 " %s", _(use_diagnosed_msg
));
1183 snprintf (new_help
, sizeof new_help
,
1184 "%s %s", help
, _(use_diagnosed_msg
));
1189 /* Get the translation. */
1192 /* Find the gap between the name of the
1193 option and its descriptive text. */
1194 tab
= strchr (help
, '\t');
1203 opt
= option
->opt_text
;
1207 /* With the -Q option enabled we change the descriptive text associated
1208 with an option to be an indication of its current setting. */
1209 if (!opts
->x_quiet_flag
)
1211 void *flag_var
= option_flag_var (i
, opts
);
1213 if (len
< (LEFT_COLUMN
+ 2))
1214 strcpy (new_help
, "\t\t");
1216 strcpy (new_help
, "\t");
1218 if (flag_var
!= NULL
1219 && option
->var_type
!= CLVC_DEFER
)
1221 if (option
->flags
& CL_JOINED
)
1223 if (option
->var_type
== CLVC_STRING
)
1225 if (* (const char **) flag_var
!= NULL
)
1226 snprintf (new_help
+ strlen (new_help
),
1227 sizeof (new_help
) - strlen (new_help
),
1228 "%s", * (const char **) flag_var
);
1230 else if (option
->var_type
== CLVC_ENUM
)
1232 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1234 const char *arg
= NULL
;
1236 value
= e
->get (flag_var
);
1237 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1239 arg
= _("[default]");
1240 snprintf (new_help
+ strlen (new_help
),
1241 sizeof (new_help
) - strlen (new_help
),
1245 sprintf (new_help
+ strlen (new_help
),
1246 "%d", * (int *) flag_var
);
1249 strcat (new_help
, option_enabled (i
, opts
)
1250 ? _("[enabled]") : _("[disabled]"));
1256 wrap_help (help
, opt
, len
, columns
);
1259 if (option
->var_type
== CLVC_ENUM
1260 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1261 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1266 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1269 printf (_(" No options with the desired characteristics were found\n"));
1274 /* PR 31349: Tell the user how to see all of the
1275 options supported by a specific front end. */
1276 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1277 if ((1U << i
) & langs
)
1278 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1279 lang_names
[i
], lang_names
[i
]);
1283 else if (! displayed
)
1284 printf (_(" All options with the desired characteristics have already been displayed\n"));
1288 /* Print details of enumerated option arguments, if those
1289 enumerations have help text headings provided. If no help text
1290 is provided, presume that the possible values are listed in the
1291 help text for the relevant options. */
1292 for (i
= 0; i
< cl_enums_count
; i
++)
1294 unsigned int j
, pos
;
1296 if (opts
->x_help_enum_printed
[i
] != 1)
1298 if (cl_enums
[i
].help
== NULL
)
1300 printf (" %s\n ", _(cl_enums
[i
].help
));
1302 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1304 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1306 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1308 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1318 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1323 opts
->x_help_enum_printed
[i
] = 2;
1327 /* Display help for a specified type of option.
1328 The options must have ALL of the INCLUDE_FLAGS set
1329 ANY of the flags in the ANY_FLAGS set
1330 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1331 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1333 print_specific_help (unsigned int include_flags
,
1334 unsigned int exclude_flags
,
1335 unsigned int any_flags
,
1336 struct gcc_options
*opts
,
1337 unsigned int lang_mask
)
1339 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1340 const char * description
= NULL
;
1341 const char * descrip_extra
= "";
1345 /* Sanity check: Make sure that we do not have more
1346 languages than we have bits available to enumerate them. */
1347 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1349 /* If we have not done so already, obtain
1350 the desired maximum width of the output. */
1351 if (opts
->x_help_columns
== 0)
1353 opts
->x_help_columns
= get_terminal_width ();
1354 if (opts
->x_help_columns
== INT_MAX
)
1355 /* Use a reasonable default. */
1356 opts
->x_help_columns
= 80;
1359 /* Decide upon the title for the options that we are going to display. */
1360 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1362 switch (flag
& include_flags
)
1369 description
= _("The following options are target specific");
1372 description
= _("The following options control compiler warning messages");
1374 case CL_OPTIMIZATION
:
1375 description
= _("The following options control optimizations");
1378 description
= _("The following options are language-independent");
1381 description
= _("The --param option recognizes the following as parameters");
1384 if (i
>= cl_lang_count
)
1386 if (exclude_flags
& all_langs_mask
)
1387 description
= _("The following options are specific to just the language ");
1389 description
= _("The following options are supported by the language ");
1390 descrip_extra
= lang_names
[i
];
1395 if (description
== NULL
)
1399 if (include_flags
& CL_UNDOCUMENTED
)
1400 description
= _("The following options are not documented");
1401 else if (include_flags
& CL_SEPARATE
)
1402 description
= _("The following options take separate arguments");
1403 else if (include_flags
& CL_JOINED
)
1404 description
= _("The following options take joined arguments");
1407 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1414 if (any_flags
& all_langs_mask
)
1415 description
= _("The following options are language-related");
1417 description
= _("The following options are language-independent");
1421 printf ("%s%s:\n", description
, descrip_extra
);
1422 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1423 opts
->x_help_columns
, opts
, lang_mask
);
1426 /* Enable FDO-related flags. */
1429 enable_fdo_optimizations (struct gcc_options
*opts
,
1430 struct gcc_options
*opts_set
,
1433 if (!opts_set
->x_flag_branch_probabilities
)
1434 opts
->x_flag_branch_probabilities
= value
;
1435 if (!opts_set
->x_flag_profile_values
)
1436 opts
->x_flag_profile_values
= value
;
1437 if (!opts_set
->x_flag_unroll_loops
)
1438 opts
->x_flag_unroll_loops
= value
;
1439 if (!opts_set
->x_flag_peel_loops
)
1440 opts
->x_flag_peel_loops
= value
;
1441 if (!opts_set
->x_flag_tracer
)
1442 opts
->x_flag_tracer
= value
;
1443 if (!opts_set
->x_flag_value_profile_transformations
)
1444 opts
->x_flag_value_profile_transformations
= value
;
1445 if (!opts_set
->x_flag_inline_functions
)
1446 opts
->x_flag_inline_functions
= value
;
1447 if (!opts_set
->x_flag_ipa_cp
)
1448 opts
->x_flag_ipa_cp
= value
;
1449 if (!opts_set
->x_flag_ipa_cp_clone
1450 && value
&& opts
->x_flag_ipa_cp
)
1451 opts
->x_flag_ipa_cp_clone
= value
;
1452 if (!opts_set
->x_flag_ipa_bit_cp
1453 && value
&& opts
->x_flag_ipa_cp
)
1454 opts
->x_flag_ipa_bit_cp
= value
;
1455 if (!opts_set
->x_flag_predictive_commoning
)
1456 opts
->x_flag_predictive_commoning
= value
;
1457 if (!opts_set
->x_flag_split_loops
)
1458 opts
->x_flag_split_loops
= value
;
1459 if (!opts_set
->x_flag_unswitch_loops
)
1460 opts
->x_flag_unswitch_loops
= value
;
1461 if (!opts_set
->x_flag_gcse_after_reload
)
1462 opts
->x_flag_gcse_after_reload
= value
;
1463 if (!opts_set
->x_flag_tree_loop_vectorize
1464 && !opts_set
->x_flag_tree_vectorize
)
1465 opts
->x_flag_tree_loop_vectorize
= value
;
1466 if (!opts_set
->x_flag_tree_slp_vectorize
1467 && !opts_set
->x_flag_tree_vectorize
)
1468 opts
->x_flag_tree_slp_vectorize
= value
;
1469 if (!opts_set
->x_flag_vect_cost_model
)
1470 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1471 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1472 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1475 /* -f{,no-}sanitize{,-recover}= suboptions. */
1476 const struct sanitizer_opts_s sanitizer_opts
[] =
1478 #define SANITIZER_OPT(name, flags, recover) \
1479 { #name, flags, sizeof #name - 1, recover }
1480 SANITIZER_OPT (address
, (SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
), true),
1481 SANITIZER_OPT (kernel
-address
, (SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
),
1483 SANITIZER_OPT (thread
, SANITIZE_THREAD
, false),
1484 SANITIZER_OPT (leak
, SANITIZE_LEAK
, false),
1485 SANITIZER_OPT (shift
, SANITIZE_SHIFT
, true),
1486 SANITIZER_OPT (shift
-base
, SANITIZE_SHIFT_BASE
, true),
1487 SANITIZER_OPT (shift
-exponent
, SANITIZE_SHIFT_EXPONENT
, true),
1488 SANITIZER_OPT (integer
-divide
-by
-zero
, SANITIZE_DIVIDE
, true),
1489 SANITIZER_OPT (undefined
, SANITIZE_UNDEFINED
, true),
1490 SANITIZER_OPT (unreachable
, SANITIZE_UNREACHABLE
, false),
1491 SANITIZER_OPT (vla
-bound
, SANITIZE_VLA
, true),
1492 SANITIZER_OPT (return, SANITIZE_RETURN
, false),
1493 SANITIZER_OPT (null
, SANITIZE_NULL
, true),
1494 SANITIZER_OPT (signed-integer
-overflow
, SANITIZE_SI_OVERFLOW
, true),
1495 SANITIZER_OPT (bool, SANITIZE_BOOL
, true),
1496 SANITIZER_OPT (enum, SANITIZE_ENUM
, true),
1497 SANITIZER_OPT (float-divide
-by
-zero
, SANITIZE_FLOAT_DIVIDE
, true),
1498 SANITIZER_OPT (float-cast
-overflow
, SANITIZE_FLOAT_CAST
, true),
1499 SANITIZER_OPT (bounds
, SANITIZE_BOUNDS
, true),
1500 SANITIZER_OPT (bounds
-strict
, SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
, true),
1501 SANITIZER_OPT (alignment
, SANITIZE_ALIGNMENT
, true),
1502 SANITIZER_OPT (nonnull
-attribute
, SANITIZE_NONNULL_ATTRIBUTE
, true),
1503 SANITIZER_OPT (returns
-nonnull
-attribute
, SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1505 SANITIZER_OPT (object
-size
, SANITIZE_OBJECT_SIZE
, true),
1506 SANITIZER_OPT (vptr
, SANITIZE_VPTR
, true),
1507 SANITIZER_OPT (all
, ~0U, true),
1508 #undef SANITIZER_OPT
1509 { NULL
, 0U, 0UL, false }
1512 /* A struct for describing a run of chars within a string. */
1514 struct string_fragment
1516 string_fragment (const char *start
, size_t len
)
1517 : m_start (start
), m_len (len
) {}
1519 const char *m_start
;
1523 /* Specialization of edit_distance_traits for string_fragment,
1524 for use by get_closest_sanitizer_option. */
1527 struct edit_distance_traits
<const string_fragment
&>
1529 static size_t get_length (const string_fragment
&fragment
)
1531 return fragment
.m_len
;
1534 static const char *get_string (const string_fragment
&fragment
)
1536 return fragment
.m_start
;
1540 /* Given ARG, an unrecognized sanitizer option, return the best
1541 matching sanitizer option, or NULL if there isn't one.
1542 CODE is OPT_fsanitize_ or OPT_fsanitize_recover_.
1543 VALUE is non-zero for the regular form of the option, zero
1544 for the "no-" form (e.g. "-fno-sanitize-recover="). */
1547 get_closest_sanitizer_option (const string_fragment
&arg
,
1548 enum opt_code code
, int value
)
1550 best_match
<const string_fragment
&, const char*> bm (arg
);
1551 for (int i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1553 /* -fsanitize=all is not valid, so don't offer it. */
1554 if (sanitizer_opts
[i
].flag
== ~0U
1555 && code
== OPT_fsanitize_
1559 /* For -fsanitize-recover= (and not -fno-sanitize-recover=),
1560 don't offer the non-recoverable options. */
1561 if (!sanitizer_opts
[i
].can_recover
1562 && code
== OPT_fsanitize_recover_
1566 bm
.consider (sanitizer_opts
[i
].name
);
1568 return bm
.get_best_meaningful_candidate ();
1571 /* Parse comma separated sanitizer suboptions from P for option SCODE,
1572 adjust previous FLAGS and return new ones. If COMPLAIN is false,
1573 don't issue diagnostics. */
1576 parse_sanitizer_options (const char *p
, location_t loc
, int scode
,
1577 unsigned int flags
, int value
, bool complain
)
1579 enum opt_code code
= (enum opt_code
) scode
;
1584 const char *comma
= strchr (p
, ',');
1596 /* Check to see if the string matches an option class name. */
1597 for (i
= 0; sanitizer_opts
[i
].name
!= NULL
; ++i
)
1598 if (len
== sanitizer_opts
[i
].len
1599 && memcmp (p
, sanitizer_opts
[i
].name
, len
) == 0)
1601 /* Handle both -fsanitize and -fno-sanitize cases. */
1602 if (value
&& sanitizer_opts
[i
].flag
== ~0U)
1604 if (code
== OPT_fsanitize_
)
1607 error_at (loc
, "-fsanitize=all option is not valid");
1610 flags
|= ~(SANITIZE_THREAD
| SANITIZE_LEAK
1611 | SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1615 /* Do not enable -fsanitize-recover=unreachable and
1616 -fsanitize-recover=return if -fsanitize-recover=undefined
1618 if (code
== OPT_fsanitize_recover_
1619 && sanitizer_opts
[i
].flag
== SANITIZE_UNDEFINED
)
1620 flags
|= (SANITIZE_UNDEFINED
1621 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
));
1623 flags
|= sanitizer_opts
[i
].flag
;
1626 flags
&= ~sanitizer_opts
[i
].flag
;
1631 if (! found
&& complain
)
1634 = get_closest_sanitizer_option (string_fragment (p
, len
),
1639 "unrecognized argument to -f%ssanitize%s= option: %q.*s;"
1640 " did you mean %qs?",
1642 code
== OPT_fsanitize_
? "" : "-recover",
1643 (int) len
, p
, hint
);
1646 "unrecognized argument to -f%ssanitize%s= option: %q.*s",
1648 code
== OPT_fsanitize_
? "" : "-recover",
1659 /* Handle target- and language-independent options. Return zero to
1660 generate an "unknown option" message. Only options that need
1661 extra handling need to be listed here; if you simply want
1662 DECODED->value assigned to a variable, it happens automatically. */
1665 common_handle_option (struct gcc_options
*opts
,
1666 struct gcc_options
*opts_set
,
1667 const struct cl_decoded_option
*decoded
,
1668 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1670 const struct cl_option_handlers
*handlers
,
1671 diagnostic_context
*dc
)
1673 size_t scode
= decoded
->opt_index
;
1674 const char *arg
= decoded
->arg
;
1675 int value
= decoded
->value
;
1676 enum opt_code code
= (enum opt_code
) scode
;
1678 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1683 handle_param (opts
, opts_set
, loc
, arg
);
1688 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1689 unsigned int undoc_mask
;
1692 if (lang_mask
== CL_DRIVER
)
1695 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1698 /* First display any single language specific options. */
1699 for (i
= 0; i
< cl_lang_count
; i
++)
1701 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1703 /* Next display any multi language specific options. */
1704 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1705 /* Then display any remaining, non-language options. */
1706 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1708 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1709 opts
->x_exit_after_options
= true;
1713 case OPT__target_help
:
1714 if (lang_mask
== CL_DRIVER
)
1717 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1718 opts
->x_exit_after_options
= true;
1723 const char *a
= arg
;
1724 unsigned int include_flags
= 0;
1725 /* Note - by default we include undocumented options when listing
1726 specific classes. If you only want to see documented options
1727 then add ",^undocumented" to the --help= option. E.g.:
1729 --help=target,^undocumented */
1730 unsigned int exclude_flags
= 0;
1732 if (lang_mask
== CL_DRIVER
)
1735 /* Walk along the argument string, parsing each word in turn.
1737 arg = [^]{word}[,{arg}]
1738 word = {optimizers|target|warnings|undocumented|
1739 params|common|<language>} */
1749 { "optimizers", CL_OPTIMIZATION
},
1750 { "target", CL_TARGET
},
1751 { "warnings", CL_WARNING
},
1752 { "undocumented", CL_UNDOCUMENTED
},
1753 { "params", CL_PARAMS
},
1754 { "joined", CL_JOINED
},
1755 { "separate", CL_SEPARATE
},
1756 { "common", CL_COMMON
},
1759 unsigned int *pflags
;
1761 unsigned int lang_flag
, specific_flag
;
1770 error_at (loc
, "missing argument to %qs", "--help=^");
1773 pflags
= &exclude_flags
;
1776 pflags
= &include_flags
;
1778 comma
= strchr (a
, ',');
1789 /* Check to see if the string matches an option class name. */
1790 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1791 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1793 specific_flag
= specifics
[i
].flag
;
1797 /* Check to see if the string matches a language name.
1798 Note - we rely upon the alpha-sorted nature of the entries in
1799 the lang_names array, specifically that shorter names appear
1800 before their longer variants. (i.e. C before C++). That way
1801 when we are attempting to match --help=c for example we will
1802 match with C first and not C++. */
1803 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1804 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1806 lang_flag
= 1U << i
;
1810 if (specific_flag
!= 0)
1813 *pflags
|= specific_flag
;
1816 /* The option's argument matches both the start of a
1817 language name and the start of an option class name.
1818 We have a special case for when the user has
1819 specified "--help=c", but otherwise we have to issue
1821 if (strncasecmp (a
, "c", len
) == 0)
1822 *pflags
|= lang_flag
;
1825 "--help argument %q.*s is ambiguous, "
1826 "please be more specific",
1830 else if (lang_flag
!= 0)
1831 *pflags
|= lang_flag
;
1834 "unrecognized argument to --help= option: %q.*s",
1843 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1845 opts
->x_exit_after_options
= true;
1850 if (lang_mask
== CL_DRIVER
)
1853 opts
->x_exit_after_options
= true;
1856 case OPT_fsanitize_
:
1857 opts
->x_flag_sanitize
1858 = parse_sanitizer_options (arg
, loc
, code
,
1859 opts
->x_flag_sanitize
, value
, true);
1861 /* Kernel ASan implies normal ASan but does not yet support
1863 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1865 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
,
1866 0, opts
->x_param_values
,
1867 opts_set
->x_param_values
);
1868 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0, opts
->x_param_values
,
1869 opts_set
->x_param_values
);
1870 maybe_set_param_value (PARAM_ASAN_STACK
, 0, opts
->x_param_values
,
1871 opts_set
->x_param_values
);
1872 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1873 opts
->x_param_values
,
1874 opts_set
->x_param_values
);
1878 case OPT_fsanitize_recover_
:
1879 opts
->x_flag_sanitize_recover
1880 = parse_sanitizer_options (arg
, loc
, code
,
1881 opts
->x_flag_sanitize_recover
, value
, true);
1884 case OPT_fasan_shadow_offset_
:
1888 case OPT_fsanitize_address_use_after_scope
:
1889 opts
->x_flag_sanitize_address_use_after_scope
= value
;
1892 case OPT_fsanitize_recover
:
1894 opts
->x_flag_sanitize_recover
1895 |= (SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
)
1896 & ~(SANITIZE_UNREACHABLE
| SANITIZE_RETURN
);
1898 opts
->x_flag_sanitize_recover
1899 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1906 /* Currently handled in a prescan. */
1910 dc
->warning_as_error_requested
= value
;
1914 if (lang_mask
== CL_DRIVER
)
1917 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1918 opts
, opts_set
, loc
, dc
);
1921 case OPT_Wlarger_than_
:
1922 opts
->x_larger_than_size
= value
;
1923 opts
->x_warn_larger_than
= value
!= -1;
1926 case OPT_Wfatal_errors
:
1927 dc
->fatal_errors
= value
;
1930 case OPT_Wframe_larger_than_
:
1931 opts
->x_frame_larger_than_size
= value
;
1932 opts
->x_warn_frame_larger_than
= value
!= -1;
1935 case OPT_Wstack_usage_
:
1936 opts
->x_warn_stack_usage
= value
;
1937 opts
->x_flag_stack_usage_info
= value
!= -1;
1940 case OPT_Wstrict_aliasing
:
1941 set_Wstrict_aliasing (opts
, value
);
1944 case OPT_Wstrict_overflow
:
1945 opts
->x_warn_strict_overflow
= (value
1946 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1950 case OPT_Wsystem_headers
:
1951 dc
->dc_warn_system_headers
= value
;
1955 opts
->x_flag_gen_aux_info
= 1;
1958 case OPT_auxbase_strip
:
1960 char *tmp
= xstrdup (arg
);
1961 strip_off_ending (tmp
, strlen (tmp
));
1963 opts
->x_aux_base_name
= tmp
;
1970 decode_d_option (arg
, opts
, loc
, dc
);
1973 case OPT_fcall_used_
:
1974 case OPT_fcall_saved_
:
1982 case OPT_fdbg_cnt_list
:
1984 opts
->x_exit_after_options
= true;
1987 case OPT_fdebug_prefix_map_
:
1991 case OPT_fdiagnostics_show_location_
:
1992 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1995 case OPT_fdiagnostics_show_caret
:
1996 dc
->show_caret
= value
;
1999 case OPT_fdiagnostics_color_
:
2000 diagnostic_color_init (dc
, value
);
2003 case OPT_fdiagnostics_parseable_fixits
:
2004 dc
->parseable_fixits_p
= value
;
2007 case OPT_fdiagnostics_show_option
:
2008 dc
->show_option_requested
= value
;
2015 case OPT_ffast_math
:
2016 set_fast_math_flags (opts
, value
);
2019 case OPT_funsafe_math_optimizations
:
2020 set_unsafe_math_optimizations_flags (opts
, value
);
2027 case OPT_finline_limit_
:
2028 set_param_value ("max-inline-insns-single", value
/ 2,
2029 opts
->x_param_values
, opts_set
->x_param_values
);
2030 set_param_value ("max-inline-insns-auto", value
/ 2,
2031 opts
->x_param_values
, opts_set
->x_param_values
);
2034 case OPT_finstrument_functions_exclude_function_list_
:
2035 add_comma_separated_to_vector
2036 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
2039 case OPT_finstrument_functions_exclude_file_list_
:
2040 add_comma_separated_to_vector
2041 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
2044 case OPT_fmessage_length_
:
2045 pp_set_line_maximum_length (dc
->printer
, value
);
2046 diagnostic_set_caret_max_width (dc
, value
);
2050 case OPT_fopt_info_
:
2056 const char *p
= arg
;
2057 opts
->x_flag_disable_hsa
= true;
2060 const char *comma
= strchr (p
, ',');
2062 if ((strncmp (p
, "disable", 7) == 0)
2063 && (p
[7] == ',' || p
[7] == '\0'))
2065 opts
->x_flag_disable_hsa
= true;
2069 if ((strncmp (p
, "hsa", 3) == 0)
2070 && (p
[3] == ',' || p
[3] == '\0'))
2073 opts
->x_flag_disable_hsa
= false;
2075 sorry ("HSA has not been enabled during configuration");
2085 #ifndef ACCEL_COMPILER
2086 case OPT_foffload_abi_
:
2087 error_at (loc
, "-foffload-abi option can be specified only for "
2088 "offload compiler");
2092 case OPT_fpack_struct_
:
2093 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
2095 "structure alignment must be a small power of two, not %d",
2098 opts
->x_initial_max_fld_align
= value
;
2102 case OPT_fplugin_arg_
:
2106 case OPT_fprofile_use_
:
2107 opts
->x_profile_data_prefix
= xstrdup (arg
);
2108 opts
->x_flag_profile_use
= true;
2110 /* No break here - do -fprofile-use processing. */
2112 case OPT_fprofile_use
:
2113 enable_fdo_optimizations (opts
, opts_set
, value
);
2114 if (!opts_set
->x_flag_profile_reorder_functions
)
2115 opts
->x_flag_profile_reorder_functions
= value
;
2116 /* Indirect call profiling should do all useful transformations
2117 speculative devirtualization does. */
2118 if (!opts_set
->x_flag_devirtualize_speculatively
2119 && opts
->x_flag_value_profile_transformations
)
2120 opts
->x_flag_devirtualize_speculatively
= false;
2123 case OPT_fauto_profile_
:
2124 opts
->x_auto_profile_file
= xstrdup (arg
);
2125 opts
->x_flag_auto_profile
= true;
2127 /* No break here - do -fauto-profile processing. */
2129 case OPT_fauto_profile
:
2130 enable_fdo_optimizations (opts
, opts_set
, value
);
2131 if (!opts_set
->x_flag_profile_correction
)
2132 opts
->x_flag_profile_correction
= value
;
2133 maybe_set_param_value (
2134 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
2135 opts
->x_param_values
, opts_set
->x_param_values
);
2138 case OPT_fprofile_generate_
:
2139 opts
->x_profile_data_prefix
= xstrdup (arg
);
2141 /* No break here - do -fprofile-generate processing. */
2143 case OPT_fprofile_generate
:
2144 if (!opts_set
->x_profile_arc_flag
)
2145 opts
->x_profile_arc_flag
= value
;
2146 if (!opts_set
->x_flag_profile_values
)
2147 opts
->x_flag_profile_values
= value
;
2148 if (!opts_set
->x_flag_inline_functions
)
2149 opts
->x_flag_inline_functions
= value
;
2150 if (!opts_set
->x_flag_ipa_bit_cp
)
2151 opts
->x_flag_ipa_bit_cp
= value
;
2152 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
2153 quadratic. Disable the pass until better memory representation
2155 if (!opts_set
->x_flag_ipa_reference
)
2156 opts
->x_flag_ipa_reference
= false;
2159 case OPT_ftree_vectorize
:
2160 if (!opts_set
->x_flag_tree_loop_vectorize
)
2161 opts
->x_flag_tree_loop_vectorize
= value
;
2162 if (!opts_set
->x_flag_tree_slp_vectorize
)
2163 opts
->x_flag_tree_slp_vectorize
= value
;
2165 case OPT_fshow_column
:
2166 dc
->show_column
= value
;
2169 case OPT_frandom_seed
:
2170 /* The real switch is -fno-random-seed. */
2176 case OPT_frandom_seed_
:
2180 case OPT_fsched_verbose_
:
2181 #ifdef INSN_SCHEDULING
2182 /* Handled with Var in common.opt. */
2188 case OPT_fsched_stalled_insns_
:
2189 opts
->x_flag_sched_stalled_insns
= value
;
2190 if (opts
->x_flag_sched_stalled_insns
== 0)
2191 opts
->x_flag_sched_stalled_insns
= -1;
2194 case OPT_fsched_stalled_insns_dep_
:
2195 opts
->x_flag_sched_stalled_insns_dep
= value
;
2198 case OPT_fstack_check_
:
2199 if (!strcmp (arg
, "no"))
2200 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2201 else if (!strcmp (arg
, "generic"))
2202 /* This is the old stack checking method. */
2203 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2204 ? FULL_BUILTIN_STACK_CHECK
2205 : GENERIC_STACK_CHECK
;
2206 else if (!strcmp (arg
, "specific"))
2207 /* This is the new stack checking method. */
2208 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2209 ? FULL_BUILTIN_STACK_CHECK
2210 : STACK_CHECK_STATIC_BUILTIN
2211 ? STATIC_BUILTIN_STACK_CHECK
2212 : GENERIC_STACK_CHECK
;
2214 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2217 case OPT_fstack_limit
:
2218 /* The real switch is -fno-stack-limit. */
2224 case OPT_fstack_limit_register_
:
2225 case OPT_fstack_limit_symbol_
:
2229 case OPT_fstack_usage
:
2230 opts
->x_flag_stack_usage
= value
;
2231 opts
->x_flag_stack_usage_info
= value
!= 0;
2235 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2240 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2244 if (arg
&& strlen (arg
) != 0)
2246 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2247 "use %<-gdwarf-%s%> for DWARF version "
2248 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2252 value
= opts
->x_dwarf_version
;
2256 if (value
< 2 || value
> 5)
2257 error_at (loc
, "dwarf version %d is not supported", value
);
2259 opts
->x_dwarf_version
= value
;
2260 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2263 case OPT_gsplit_dwarf
:
2264 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2269 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2274 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2279 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2284 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2290 /* Handled completely via specs. */
2293 case OPT_pedantic_errors
:
2294 dc
->pedantic_errors
= 1;
2295 control_warning_option (OPT_Wpedantic
, DK_ERROR
, NULL
, value
,
2297 handlers
, opts
, opts_set
,
2302 opts
->x_flag_lto
= value
? "" : NULL
;
2306 dc
->dc_inhibit_warnings
= true;
2309 case OPT_fmax_errors_
:
2310 dc
->max_errors
= value
;
2313 case OPT_fuse_ld_bfd
:
2314 case OPT_fuse_ld_gold
:
2315 case OPT_fuse_linker_plugin
:
2316 /* No-op. Used by the driver and passed to us because it starts with f.*/
2321 opts
->x_flag_trapv
= 0;
2326 opts
->x_flag_wrapv
= 0;
2330 opts
->x_flag_ipa_icf_functions
= value
;
2331 opts
->x_flag_ipa_icf_variables
= value
;
2335 /* If the flag was handled in a standard way, assume the lack of
2336 processing here is intentional. */
2337 gcc_assert (option_flag_var (scode
, opts
));
2341 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2346 /* Handle --param NAME=VALUE. */
2348 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2349 location_t loc
, const char *carg
)
2354 arg
= xstrdup (carg
);
2355 equal
= strchr (arg
, '=');
2357 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2363 enum compiler_param index
;
2364 if (!find_param (arg
, &index
))
2366 const char *suggestion
= find_param_fuzzy (arg
);
2368 error_at (loc
, "invalid --param name %qs; did you mean %qs?",
2371 error_at (loc
, "invalid --param name %qs", arg
);
2375 if (!param_string_value_p (index
, equal
+ 1, &value
))
2376 value
= integral_argument (equal
+ 1);
2379 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2381 set_param_value (arg
, value
,
2382 opts
->x_param_values
, opts_set
->x_param_values
);
2389 /* Used to set the level of strict aliasing warnings in OPTS,
2390 when no level is specified (i.e., when -Wstrict-aliasing, and not
2391 -Wstrict-aliasing=level was given).
2392 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2393 and 0 otherwise. After calling this function, wstrict_aliasing will be
2394 set to the default value of -Wstrict_aliasing=level, currently 3. */
2396 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2398 gcc_assert (onoff
== 0 || onoff
== 1);
2400 opts
->x_warn_strict_aliasing
= 3;
2402 opts
->x_warn_strict_aliasing
= 0;
2405 /* The following routines are useful in setting all the flags that
2406 -ffast-math and -fno-fast-math imply. */
2408 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2410 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2412 opts
->x_flag_unsafe_math_optimizations
= set
;
2413 set_unsafe_math_optimizations_flags (opts
, set
);
2415 if (!opts
->frontend_set_flag_finite_math_only
)
2416 opts
->x_flag_finite_math_only
= set
;
2417 if (!opts
->frontend_set_flag_errno_math
)
2418 opts
->x_flag_errno_math
= !set
;
2421 if (opts
->frontend_set_flag_excess_precision_cmdline
2422 == EXCESS_PRECISION_DEFAULT
)
2423 opts
->x_flag_excess_precision_cmdline
2424 = set
? EXCESS_PRECISION_FAST
: EXCESS_PRECISION_DEFAULT
;
2425 if (!opts
->frontend_set_flag_signaling_nans
)
2426 opts
->x_flag_signaling_nans
= 0;
2427 if (!opts
->frontend_set_flag_rounding_math
)
2428 opts
->x_flag_rounding_math
= 0;
2429 if (!opts
->frontend_set_flag_cx_limited_range
)
2430 opts
->x_flag_cx_limited_range
= 1;
2434 /* When -funsafe-math-optimizations is set the following
2435 flags are set as well. */
2437 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2439 if (!opts
->frontend_set_flag_trapping_math
)
2440 opts
->x_flag_trapping_math
= !set
;
2441 if (!opts
->frontend_set_flag_signed_zeros
)
2442 opts
->x_flag_signed_zeros
= !set
;
2443 if (!opts
->frontend_set_flag_associative_math
)
2444 opts
->x_flag_associative_math
= set
;
2445 if (!opts
->frontend_set_flag_reciprocal_math
)
2446 opts
->x_flag_reciprocal_math
= set
;
2449 /* Return true iff flags in OPTS are set as if -ffast-math. */
2451 fast_math_flags_set_p (const struct gcc_options
*opts
)
2453 return (!opts
->x_flag_trapping_math
2454 && opts
->x_flag_unsafe_math_optimizations
2455 && opts
->x_flag_finite_math_only
2456 && !opts
->x_flag_signed_zeros
2457 && !opts
->x_flag_errno_math
2458 && opts
->x_flag_excess_precision_cmdline
2459 == EXCESS_PRECISION_FAST
);
2462 /* Return true iff flags are set as if -ffast-math but using the flags stored
2463 in the struct cl_optimization structure. */
2465 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2467 return (!opt
->x_flag_trapping_math
2468 && opt
->x_flag_unsafe_math_optimizations
2469 && opt
->x_flag_finite_math_only
2470 && !opt
->x_flag_signed_zeros
2471 && !opt
->x_flag_errno_math
);
2474 /* Handle a debug output -g switch for options OPTS
2475 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2476 explicitly), location LOC. EXTENDED is true or false to support
2477 extended output (2 is special and means "-ggdb" was given). */
2479 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2480 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2483 opts
->x_use_gnu_debug_info_extensions
= extended
;
2485 if (type
== NO_DEBUG
)
2487 if (opts
->x_write_symbols
== NO_DEBUG
)
2489 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2493 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2494 opts
->x_write_symbols
= DWARF2_DEBUG
;
2495 #elif defined DBX_DEBUGGING_INFO
2496 opts
->x_write_symbols
= DBX_DEBUG
;
2500 if (opts
->x_write_symbols
== NO_DEBUG
)
2501 warning_at (loc
, 0, "target system does not support debug output");
2506 /* Does it conflict with an already selected type? */
2507 if (opts_set
->x_write_symbols
!= NO_DEBUG
2508 && opts
->x_write_symbols
!= NO_DEBUG
2509 && type
!= opts
->x_write_symbols
)
2510 error_at (loc
, "debug format %qs conflicts with prior selection",
2511 debug_type_names
[type
]);
2512 opts
->x_write_symbols
= type
;
2513 opts_set
->x_write_symbols
= type
;
2516 /* A debug flag without a level defaults to level 2.
2517 If off or at level 1, set it to level 2, but if already
2518 at level 3, don't lower it. */
2521 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2522 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2526 int argval
= integral_argument (arg
);
2528 error_at (loc
, "unrecognized debug output level %qs", arg
);
2529 else if (argval
> 3)
2530 error_at (loc
, "debug output level %qs is too high", arg
);
2532 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2536 /* Arrange to dump core on error for diagnostic context DC. (The
2537 regular error message is still printed first, except in the case of
2541 setup_core_dumping (diagnostic_context
*dc
)
2544 signal (SIGABRT
, SIG_DFL
);
2546 #if defined(HAVE_SETRLIMIT)
2549 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2550 fatal_error (input_location
, "getting core file size maximum limit: %m");
2551 rlim
.rlim_cur
= rlim
.rlim_max
;
2552 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2553 fatal_error (input_location
,
2554 "setting core file size limit to maximum: %m");
2557 diagnostic_abort_on_error (dc
);
2560 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2561 diagnostic context DC. */
2564 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2565 location_t loc
, diagnostic_context
*dc
)
2573 opts
->x_flag_debug_asm
= 1;
2576 opts
->x_flag_print_asm_name
= 1;
2579 opts
->x_flag_dump_rtl_in_asm
= 1;
2580 opts
->x_flag_print_asm_name
= 1;
2583 opts
->x_rtl_dump_and_exit
= 1;
2585 case 'D': /* These are handled by the preprocessor. */
2592 setup_core_dumping (dc
);
2595 opts
->x_flag_dump_all_passed
= true;
2599 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2604 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2605 mask LANG_MASK, option handlers HANDLERS) as an error for option
2606 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2607 NULL), location LOC. This is used by -Werror=. */
2610 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2611 const struct cl_option_handlers
*handlers
,
2612 struct gcc_options
*opts
,
2613 struct gcc_options
*opts_set
,
2614 location_t loc
, diagnostic_context
*dc
)
2619 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2620 new_option
[0] = 'W';
2621 strcpy (new_option
+ 1, arg
);
2622 option_index
= find_opt (new_option
, lang_mask
);
2623 if (option_index
== OPT_SPECIAL_unknown
)
2624 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2625 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2626 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2630 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2631 const char *arg
= NULL
;
2633 if (cl_options
[option_index
].flags
& CL_JOINED
)
2634 arg
= new_option
+ cl_options
[option_index
].opt_len
;
2635 control_warning_option (option_index
, (int) kind
, arg
, value
,
2637 handlers
, opts
, opts_set
, dc
);
2642 /* Return malloced memory for the name of the option OPTION_INDEX
2643 which enabled a diagnostic (context CONTEXT), originally of type
2644 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2648 option_name (diagnostic_context
*context
, int option_index
,
2649 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2653 /* A warning classified as an error. */
2654 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2655 && diag_kind
== DK_ERROR
)
2656 return concat (cl_options
[OPT_Werror_
].opt_text
,
2657 /* Skip over "-W". */
2658 cl_options
[option_index
].opt_text
+ 2,
2660 /* A warning with option. */
2662 return xstrdup (cl_options
[option_index
].opt_text
);
2664 /* A warning without option classified as an error. */
2665 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2666 || diag_kind
== DK_WARNING
)
2667 && context
->warning_as_error_requested
)
2668 return xstrdup (cl_options
[OPT_Werror
].opt_text
);