1 /* Command line option handling.
2 Copyright (C) 2002-2015 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 and OPTS_SET before using them in parsing options. */
272 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
274 size_t num_params
= get_num_compiler_params ();
276 gcc_obstack_init (&opts_obstack
);
278 *opts
= global_options_init
;
281 memset (opts_set
, 0, sizeof (*opts_set
));
283 opts
->x_param_values
= XNEWVEC (int, num_params
);
286 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
288 init_param_values (opts
->x_param_values
);
290 /* Initialize whether `char' is signed. */
291 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
292 /* Set this to a special "uninitialized" value. The actual default
293 is set after target options have been processed. */
294 opts
->x_flag_short_enums
= 2;
296 /* Initialize target_flags before default_options_optimization
297 so the latter can modify it. */
298 opts
->x_target_flags
= targetm_common
.default_target_flags
;
300 /* Some targets have ABI-specified unwind tables. */
301 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
303 /* Some targets have other target-specific initialization. */
304 targetm_common
.option_init_struct (opts
);
307 /* Release any allocations owned by OPTS. */
310 finalize_options_struct (struct gcc_options
*opts
)
312 XDELETEVEC (opts
->x_param_values
);
315 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
316 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
317 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
318 mask LANG_MASK and option handlers HANDLERS. */
321 maybe_default_option (struct gcc_options
*opts
,
322 struct gcc_options
*opts_set
,
323 const struct default_options
*default_opt
,
324 int level
, bool size
, bool fast
, bool debug
,
325 unsigned int lang_mask
,
326 const struct cl_option_handlers
*handlers
,
328 diagnostic_context
*dc
)
330 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
334 gcc_assert (level
== 2);
336 gcc_assert (level
== 3);
338 gcc_assert (level
== 1);
340 switch (default_opt
->levels
)
346 case OPT_LEVELS_0_ONLY
:
347 enabled
= (level
== 0);
350 case OPT_LEVELS_1_PLUS
:
351 enabled
= (level
>= 1);
354 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
355 enabled
= (level
>= 1 && !size
&& !debug
);
358 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
359 enabled
= (level
>= 1 && !debug
);
362 case OPT_LEVELS_2_PLUS
:
363 enabled
= (level
>= 2);
366 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
367 enabled
= (level
>= 2 && !size
&& !debug
);
370 case OPT_LEVELS_3_PLUS
:
371 enabled
= (level
>= 3);
374 case OPT_LEVELS_3_PLUS_AND_SIZE
:
375 enabled
= (level
>= 3 || size
);
378 case OPT_LEVELS_SIZE
:
382 case OPT_LEVELS_FAST
:
386 case OPT_LEVELS_NONE
:
392 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
393 default_opt
->arg
, default_opt
->value
,
394 lang_mask
, DK_UNSPECIFIED
, loc
,
396 else if (default_opt
->arg
== NULL
397 && !option
->cl_reject_negative
)
398 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
399 default_opt
->arg
, !default_opt
->value
,
400 lang_mask
, DK_UNSPECIFIED
, loc
,
404 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
405 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
406 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
407 language mask LANG_MASK and option handlers HANDLERS. */
410 maybe_default_options (struct gcc_options
*opts
,
411 struct gcc_options
*opts_set
,
412 const struct default_options
*default_opts
,
413 int level
, bool size
, bool fast
, bool debug
,
414 unsigned int lang_mask
,
415 const struct cl_option_handlers
*handlers
,
417 diagnostic_context
*dc
)
421 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
422 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
423 level
, size
, fast
, debug
,
424 lang_mask
, handlers
, loc
, dc
);
427 /* Table of options enabled by default at different levels. */
429 static const struct default_options default_options_table
[] =
431 /* -O1 optimizations. */
432 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_coalesce_vars
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
465 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
466 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
468 /* -O2 optimizations. */
469 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
481 #ifdef INSN_SCHEDULING
482 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
483 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_freorder_blocks_algorithm_
, NULL
,
489 REORDER_BLOCKS_ALGORITHM_STC
},
490 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
494 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp_alignment
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
500 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
501 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
503 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
504 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
505 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
506 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
507 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
508 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
509 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
510 { OPT_LEVELS_2_PLUS
, OPT_fipa_ra
, NULL
, 1 },
511 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
513 /* -O3 optimizations. */
514 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
515 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
516 /* Inlining of functions reducing size is a good idea with -Os
517 regardless of them being declared inline. */
518 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
519 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
520 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
521 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
522 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
523 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
524 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
525 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
526 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
528 /* -Ofast adds optimizations to -O3. */
529 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
531 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
534 /* Default the options in OPTS and OPTS_SET based on the optimization
535 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
537 default_options_optimization (struct gcc_options
*opts
,
538 struct gcc_options
*opts_set
,
539 struct cl_decoded_option
*decoded_options
,
540 unsigned int decoded_options_count
,
542 unsigned int lang_mask
,
543 const struct cl_option_handlers
*handlers
,
544 diagnostic_context
*dc
)
549 /* Scan to see what optimization level has been specified. That will
550 determine the default value of many flags. */
551 for (i
= 1; i
< decoded_options_count
; i
++)
553 struct cl_decoded_option
*opt
= &decoded_options
[i
];
554 switch (opt
->opt_index
)
557 if (*opt
->arg
== '\0')
559 opts
->x_optimize
= 1;
560 opts
->x_optimize_size
= 0;
561 opts
->x_optimize_fast
= 0;
562 opts
->x_optimize_debug
= 0;
566 const int optimize_val
= integral_argument (opt
->arg
);
567 if (optimize_val
== -1)
568 error_at (loc
, "argument to %<-O%> should be a non-negative "
569 "integer, %<g%>, %<s%> or %<fast%>");
572 opts
->x_optimize
= optimize_val
;
573 if ((unsigned int) opts
->x_optimize
> 255)
574 opts
->x_optimize
= 255;
575 opts
->x_optimize_size
= 0;
576 opts
->x_optimize_fast
= 0;
577 opts
->x_optimize_debug
= 0;
583 opts
->x_optimize_size
= 1;
585 /* Optimizing for size forces optimize to be 2. */
586 opts
->x_optimize
= 2;
587 opts
->x_optimize_fast
= 0;
588 opts
->x_optimize_debug
= 0;
592 /* -Ofast only adds flags to -O3. */
593 opts
->x_optimize_size
= 0;
594 opts
->x_optimize
= 3;
595 opts
->x_optimize_fast
= 1;
596 opts
->x_optimize_debug
= 0;
600 /* -Og selects optimization level 1. */
601 opts
->x_optimize_size
= 0;
602 opts
->x_optimize
= 1;
603 opts
->x_optimize_fast
= 0;
604 opts
->x_optimize_debug
= 1;
608 /* Ignore other options in this prescan. */
613 maybe_default_options (opts
, opts_set
, default_options_table
,
614 opts
->x_optimize
, opts
->x_optimize_size
,
615 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
616 lang_mask
, handlers
, loc
, dc
);
618 /* -O2 param settings. */
619 opt2
= (opts
->x_optimize
>= 2);
621 /* Track fields in field-sensitive alias analysis. */
622 maybe_set_param_value
623 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
624 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
625 opts
->x_param_values
, opts_set
->x_param_values
);
627 /* For -O1 only do loop invariant motion for very small loops. */
628 maybe_set_param_value
629 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
630 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
631 opts
->x_param_values
, opts_set
->x_param_values
);
633 /* At -Ofast, allow store motion to introduce potential race conditions. */
634 maybe_set_param_value
635 (PARAM_ALLOW_STORE_DATA_RACES
,
636 opts
->x_optimize_fast
? 1
637 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
638 opts
->x_param_values
, opts_set
->x_param_values
);
640 if (opts
->x_optimize_size
)
641 /* We want to crossjump as much as possible. */
642 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
643 opts
->x_param_values
, opts_set
->x_param_values
);
645 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
646 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
647 opts
->x_param_values
, opts_set
->x_param_values
);
649 /* Restrict the amount of work combine does at -Og while retaining
650 most of its useful transforms. */
651 if (opts
->x_optimize_debug
)
652 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
653 opts
->x_param_values
, opts_set
->x_param_values
);
655 /* Allow default optimizations to be specified on a per-machine basis. */
656 maybe_default_options (opts
, opts_set
,
657 targetm_common
.option_optimization_table
,
658 opts
->x_optimize
, opts
->x_optimize_size
,
659 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
660 lang_mask
, handlers
, loc
, dc
);
663 /* After all options at LOC have been read into OPTS and OPTS_SET,
664 finalize settings of those options and diagnose incompatible
667 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
670 enum unwind_info_type ui_except
;
672 if (opts
->x_dump_base_name
673 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
674 && ! opts
->x_dump_base_name_prefixed
)
676 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
677 OPTS->X_DUMP_DIR_NAME directory. Then try to make
678 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
679 directory, typically the directory to contain the object
681 if (opts
->x_dump_dir_name
)
682 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
683 opts
->x_dump_base_name
, NULL
);
684 else if (opts
->x_aux_base_name
685 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
687 const char *aux_base
;
689 base_of_path (opts
->x_aux_base_name
, &aux_base
);
690 if (opts
->x_aux_base_name
!= aux_base
)
692 int dir_len
= aux_base
- opts
->x_aux_base_name
;
693 char *new_dump_base_name
694 = XOBNEWVEC (&opts_obstack
, char,
695 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
697 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
698 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
699 /* Append existing OPTS->X_DUMP_BASE_NAME. */
700 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
701 opts
->x_dump_base_name
= new_dump_base_name
;
704 opts
->x_dump_base_name_prefixed
= true;
707 /* Handle related options for unit-at-a-time, toplevel-reorder, and
709 if (!opts
->x_flag_unit_at_a_time
)
711 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
712 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
714 opts
->x_flag_section_anchors
= 0;
715 if (opts
->x_flag_toplevel_reorder
== 1)
716 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
718 opts
->x_flag_toplevel_reorder
= 0;
721 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
722 sorry ("transactional memory is not supported with non-call exceptions");
724 /* Unless the user has asked for section anchors, we disable toplevel
725 reordering at -O0 to disable transformations that might be surprising
726 to end users and to get -fno-toplevel-reorder tested. */
727 if (!opts
->x_optimize
728 && opts
->x_flag_toplevel_reorder
== 2
729 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
731 opts
->x_flag_toplevel_reorder
= 0;
732 opts
->x_flag_section_anchors
= 0;
734 if (!opts
->x_flag_toplevel_reorder
)
736 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
737 error_at (loc
, "section anchors must be disabled when toplevel reorder"
739 opts
->x_flag_section_anchors
= 0;
742 if (!opts
->x_flag_opts_finished
)
744 /* We initialize opts->x_flag_pie to -1 so that targets can set a
746 if (opts
->x_flag_pie
== -1)
748 if (opts
->x_flag_pic
== 0)
749 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
751 opts
->x_flag_pie
= 0;
753 if (opts
->x_flag_pie
)
754 opts
->x_flag_pic
= opts
->x_flag_pie
;
755 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
756 opts
->x_flag_shlib
= 1;
757 opts
->x_flag_opts_finished
= true;
760 /* We initialize opts->x_flag_stack_protect to -1 so that targets
761 can set a default value. */
762 if (opts
->x_flag_stack_protect
== -1)
763 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
765 if (opts
->x_optimize
== 0)
767 /* Inlining does not work if not optimizing,
768 so force it not to be done. */
769 opts
->x_warn_inline
= 0;
770 opts
->x_flag_no_inline
= 1;
773 /* The optimization to partition hot and cold basic blocks into separate
774 sections of the .o and executable files does not work (currently)
775 with exception handling. This is because there is no support for
776 generating unwind info. If opts->x_flag_exceptions is turned on
777 we need to turn off the partitioning optimization. */
779 ui_except
= targetm_common
.except_unwind_info (opts
);
781 if (opts
->x_flag_exceptions
782 && opts
->x_flag_reorder_blocks_and_partition
783 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
785 if (opts_set
->x_flag_reorder_blocks_and_partition
)
787 "-freorder-blocks-and-partition does not work "
788 "with exceptions on this architecture");
789 opts
->x_flag_reorder_blocks_and_partition
= 0;
790 opts
->x_flag_reorder_blocks
= 1;
793 /* If user requested unwind info, then turn off the partitioning
796 if (opts
->x_flag_unwind_tables
797 && !targetm_common
.unwind_tables_default
798 && opts
->x_flag_reorder_blocks_and_partition
799 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
801 if (opts_set
->x_flag_reorder_blocks_and_partition
)
803 "-freorder-blocks-and-partition does not support "
804 "unwind info on this architecture");
805 opts
->x_flag_reorder_blocks_and_partition
= 0;
806 opts
->x_flag_reorder_blocks
= 1;
809 /* If the target requested unwind info, then turn off the partitioning
810 optimization with a different message. Likewise, if the target does not
811 support named sections. */
813 if (opts
->x_flag_reorder_blocks_and_partition
814 && (!targetm_common
.have_named_sections
815 || (opts
->x_flag_unwind_tables
816 && targetm_common
.unwind_tables_default
817 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
819 if (opts_set
->x_flag_reorder_blocks_and_partition
)
821 "-freorder-blocks-and-partition does not work "
822 "on this architecture");
823 opts
->x_flag_reorder_blocks_and_partition
= 0;
824 opts
->x_flag_reorder_blocks
= 1;
827 /* Disable -freorder-blocks-and-partition when -fprofile-use is not in
828 effect. Function splitting was not actually being performed in that case,
829 as probably_never_executed_bb_p does not distinguish any basic blocks as
830 being cold vs hot when there is no profile data. Leaving it enabled,
831 however, causes the assembly code generator to create (empty) cold
832 sections and labels, leading to unnecessary size overhead. */
833 if (opts
->x_flag_reorder_blocks_and_partition
834 && !opts_set
->x_flag_profile_use
)
835 opts
->x_flag_reorder_blocks_and_partition
= 0;
837 if (opts
->x_flag_reorder_blocks_and_partition
838 && !opts_set
->x_flag_reorder_functions
)
839 opts
->x_flag_reorder_functions
= 1;
841 /* Pipelining of outer loops is only possible when general pipelining
842 capabilities are requested. */
843 if (!opts
->x_flag_sel_sched_pipelining
)
844 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
846 if (opts
->x_flag_conserve_stack
)
848 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
849 opts
->x_param_values
, opts_set
->x_param_values
);
850 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
851 opts
->x_param_values
, opts_set
->x_param_values
);
854 if (opts
->x_flag_lto
)
857 opts
->x_flag_generate_lto
= 1;
859 /* When generating IL, do not operate in whole-program mode.
860 Otherwise, symbols will be privatized too early, causing link
862 opts
->x_flag_whole_program
= 0;
864 error_at (loc
, "LTO support has not been enabled in this configuration");
866 if (!opts
->x_flag_fat_lto_objects
868 || (opts_set
->x_flag_use_linker_plugin
869 && !opts
->x_flag_use_linker_plugin
)))
871 if (opts_set
->x_flag_fat_lto_objects
)
872 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
873 opts
->x_flag_fat_lto_objects
= 1;
877 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
878 default value if they choose based on other options. */
879 if (opts
->x_flag_split_stack
== -1)
880 opts
->x_flag_split_stack
= 0;
881 else if (opts
->x_flag_split_stack
)
883 if (!targetm_common
.supports_split_stack (true, opts
))
885 error_at (loc
, "%<-fsplit-stack%> is not supported by "
886 "this compiler configuration");
887 opts
->x_flag_split_stack
= 0;
891 /* Tune vectorization related parametees according to cost model. */
892 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
894 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
895 6, opts
->x_param_values
, opts_set
->x_param_values
);
896 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
897 0, opts
->x_param_values
, opts_set
->x_param_values
);
898 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
899 0, opts
->x_param_values
, opts_set
->x_param_values
);
902 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
904 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
905 || !opts
->x_flag_tree_loop_if_convert
)
906 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
907 opts
->x_param_values
, opts_set
->x_param_values
);
909 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
910 if (opts
->x_dwarf_split_debug_info
)
911 opts
->x_debug_generate_pub_sections
= 2;
913 /* Userspace and kernel ASan conflict with each other. */
915 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
916 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
918 "-fsanitize=address is incompatible with "
919 "-fsanitize=kernel-address");
923 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
924 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
926 "-fsanitize=address and -fsanitize=kernel-address "
927 "are incompatible with -fsanitize=thread");
929 /* Error recovery is not allowed for ASan and TSan. */
931 if (opts
->x_flag_sanitize_recover
& SANITIZE_USER_ADDRESS
)
932 error_at (loc
, "-fsanitize-recover=address is not supported");
934 if (opts
->x_flag_sanitize_recover
& SANITIZE_THREAD
)
935 error_at (loc
, "-fsanitize-recover=thread is not supported");
937 if (opts
->x_flag_sanitize_recover
& SANITIZE_LEAK
)
938 error_at (loc
, "-fsanitize-recover=leak is not supported");
940 /* When instrumenting the pointers, we don't want to remove
941 the null pointer checks. */
942 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
943 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
944 opts
->x_flag_delete_null_pointer_checks
= 0;
946 /* Aggressive compiler optimizations may cause false negatives. */
947 if (opts
->x_flag_sanitize
)
949 opts
->x_flag_aggressive_loop_optimizations
= 0;
950 opts
->x_flag_strict_overflow
= 0;
954 #define LEFT_COLUMN 27
956 /* Output ITEM, of length ITEM_WIDTH, in the left column,
957 followed by word-wrapped HELP in a second column. */
959 wrap_help (const char *help
,
961 unsigned int item_width
,
962 unsigned int columns
)
964 unsigned int col_width
= LEFT_COLUMN
;
965 unsigned int remaining
, room
, len
;
967 remaining
= strlen (help
);
971 room
= columns
- 3 - MAX (col_width
, item_width
);
980 for (i
= 0; help
[i
]; i
++)
982 if (i
>= room
&& len
!= remaining
)
986 else if ((help
[i
] == '-' || help
[i
] == '/')
987 && help
[i
+ 1] != ' '
988 && i
> 0 && ISALPHA (help
[i
- 1]))
993 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
995 while (help
[len
] == ' ')
1003 /* Print help for a specific front-end, etc. */
1005 print_filtered_help (unsigned int include_flags
,
1006 unsigned int exclude_flags
,
1007 unsigned int any_flags
,
1008 unsigned int columns
,
1009 struct gcc_options
*opts
,
1010 unsigned int lang_mask
)
1015 bool displayed
= false;
1018 if (include_flags
== CL_PARAMS
)
1020 for (i
= 0; i
< LAST_PARAM
; i
++)
1022 const char *param
= compiler_params
[i
].option
;
1024 help
= compiler_params
[i
].help
;
1025 if (help
== NULL
|| *help
== '\0')
1027 if (exclude_flags
& CL_UNDOCUMENTED
)
1029 help
= undocumented_msg
;
1032 /* Get the translation. */
1035 if (!opts
->x_quiet_flag
)
1037 snprintf (new_help
, sizeof (new_help
),
1038 _("default %d minimum %d maximum %d"),
1039 compiler_params
[i
].default_value
,
1040 compiler_params
[i
].min_value
,
1041 compiler_params
[i
].max_value
);
1044 wrap_help (help
, param
, strlen (param
), columns
);
1050 if (!opts
->x_help_printed
)
1051 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1053 if (!opts
->x_help_enum_printed
)
1054 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1056 for (i
= 0; i
< cl_options_count
; i
++)
1058 const struct cl_option
*option
= cl_options
+ i
;
1063 if (include_flags
== 0
1064 || ((option
->flags
& include_flags
) != include_flags
))
1066 if ((option
->flags
& any_flags
) == 0)
1070 /* Skip unwanted switches. */
1071 if ((option
->flags
& exclude_flags
) != 0)
1074 /* The driver currently prints its own help text. */
1075 if ((option
->flags
& CL_DRIVER
) != 0
1076 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1077 | CL_COMMON
| CL_TARGET
)) == 0)
1081 /* Skip switches that have already been printed. */
1082 if (opts
->x_help_printed
[i
])
1085 opts
->x_help_printed
[i
] = true;
1087 help
= option
->help
;
1090 if (exclude_flags
& CL_UNDOCUMENTED
)
1093 help
= undocumented_msg
;
1096 if (option
->alias_target
< N_OPTS
1097 && cl_options
[option
->alias_target
].help
)
1099 if (help
== undocumented_msg
)
1101 /* For undocumented options that are aliases for other options
1102 that are documented, point the reader to the other option in
1103 preference of the former. */
1104 snprintf (new_help
, sizeof new_help
,
1105 _("Same as %s. Use the latter option instead."),
1106 cl_options
[option
->alias_target
].opt_text
);
1110 /* For documented options with aliases, mention the aliased
1111 option's name for reference. */
1112 snprintf (new_help
, sizeof new_help
,
1113 _("%s Same as %s."),
1114 help
, cl_options
[option
->alias_target
].opt_text
);
1120 if (option
->warn_message
)
1122 /* Mention that the use of the option will trigger a warning. */
1123 if (help
== new_help
)
1124 snprintf (new_help
+ strlen (new_help
),
1125 sizeof new_help
- strlen (new_help
),
1126 " %s", _(use_diagnosed_msg
));
1128 snprintf (new_help
, sizeof new_help
,
1129 "%s %s", help
, _(use_diagnosed_msg
));
1134 /* Get the translation. */
1137 /* Find the gap between the name of the
1138 option and its descriptive text. */
1139 tab
= strchr (help
, '\t');
1148 opt
= option
->opt_text
;
1152 /* With the -Q option enabled we change the descriptive text associated
1153 with an option to be an indication of its current setting. */
1154 if (!opts
->x_quiet_flag
)
1156 void *flag_var
= option_flag_var (i
, opts
);
1158 if (len
< (LEFT_COLUMN
+ 2))
1159 strcpy (new_help
, "\t\t");
1161 strcpy (new_help
, "\t");
1163 if (flag_var
!= NULL
1164 && option
->var_type
!= CLVC_DEFER
)
1166 if (option
->flags
& CL_JOINED
)
1168 if (option
->var_type
== CLVC_STRING
)
1170 if (* (const char **) flag_var
!= NULL
)
1171 snprintf (new_help
+ strlen (new_help
),
1172 sizeof (new_help
) - strlen (new_help
),
1173 "%s", * (const char **) flag_var
);
1175 else if (option
->var_type
== CLVC_ENUM
)
1177 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1179 const char *arg
= NULL
;
1181 value
= e
->get (flag_var
);
1182 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1184 arg
= _("[default]");
1185 snprintf (new_help
+ strlen (new_help
),
1186 sizeof (new_help
) - strlen (new_help
),
1190 sprintf (new_help
+ strlen (new_help
),
1191 "%#x", * (int *) flag_var
);
1194 strcat (new_help
, option_enabled (i
, opts
)
1195 ? _("[enabled]") : _("[disabled]"));
1201 wrap_help (help
, opt
, len
, columns
);
1204 if (option
->var_type
== CLVC_ENUM
1205 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1206 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1211 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1214 printf (_(" No options with the desired characteristics were found\n"));
1219 /* PR 31349: Tell the user how to see all of the
1220 options supported by a specific front end. */
1221 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1222 if ((1U << i
) & langs
)
1223 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end.\n"),
1224 lang_names
[i
], lang_names
[i
]);
1228 else if (! displayed
)
1229 printf (_(" All options with the desired characteristics have already been displayed\n"));
1233 /* Print details of enumerated option arguments, if those
1234 enumerations have help text headings provided. If no help text
1235 is provided, presume that the possible values are listed in the
1236 help text for the relevant options. */
1237 for (i
= 0; i
< cl_enums_count
; i
++)
1239 unsigned int j
, pos
;
1241 if (opts
->x_help_enum_printed
[i
] != 1)
1243 if (cl_enums
[i
].help
== NULL
)
1245 printf (" %s\n ", _(cl_enums
[i
].help
));
1247 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1249 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1251 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1253 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1263 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1268 opts
->x_help_enum_printed
[i
] = 2;
1272 /* Display help for a specified type of option.
1273 The options must have ALL of the INCLUDE_FLAGS set
1274 ANY of the flags in the ANY_FLAGS set
1275 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1276 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1278 print_specific_help (unsigned int include_flags
,
1279 unsigned int exclude_flags
,
1280 unsigned int any_flags
,
1281 struct gcc_options
*opts
,
1282 unsigned int lang_mask
)
1284 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1285 const char * description
= NULL
;
1286 const char * descrip_extra
= "";
1290 /* Sanity check: Make sure that we do not have more
1291 languages than we have bits available to enumerate them. */
1292 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1294 /* If we have not done so already, obtain
1295 the desired maximum width of the output. */
1296 if (opts
->x_help_columns
== 0)
1298 opts
->x_help_columns
= get_terminal_width ();
1299 if (opts
->x_help_columns
== INT_MAX
)
1300 /* Use a reasonable default. */
1301 opts
->x_help_columns
= 80;
1304 /* Decide upon the title for the options that we are going to display. */
1305 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1307 switch (flag
& include_flags
)
1314 description
= _("The following options are target specific");
1317 description
= _("The following options control compiler warning messages");
1319 case CL_OPTIMIZATION
:
1320 description
= _("The following options control optimizations");
1323 description
= _("The following options are language-independent");
1326 description
= _("The --param option recognizes the following as parameters");
1329 if (i
>= cl_lang_count
)
1331 if (exclude_flags
& all_langs_mask
)
1332 description
= _("The following options are specific to just the language ");
1334 description
= _("The following options are supported by the language ");
1335 descrip_extra
= lang_names
[i
];
1340 if (description
== NULL
)
1344 if (include_flags
& CL_UNDOCUMENTED
)
1345 description
= _("The following options are not documented");
1346 else if (include_flags
& CL_SEPARATE
)
1347 description
= _("The following options take separate arguments");
1348 else if (include_flags
& CL_JOINED
)
1349 description
= _("The following options take joined arguments");
1352 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1359 if (any_flags
& all_langs_mask
)
1360 description
= _("The following options are language-related");
1362 description
= _("The following options are language-independent");
1366 printf ("%s%s:\n", description
, descrip_extra
);
1367 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1368 opts
->x_help_columns
, opts
, lang_mask
);
1371 /* Enable FDO-related flags. */
1374 enable_fdo_optimizations (struct gcc_options
*opts
,
1375 struct gcc_options
*opts_set
,
1378 if (!opts_set
->x_flag_branch_probabilities
)
1379 opts
->x_flag_branch_probabilities
= value
;
1380 if (!opts_set
->x_flag_profile_values
)
1381 opts
->x_flag_profile_values
= value
;
1382 if (!opts_set
->x_flag_unroll_loops
)
1383 opts
->x_flag_unroll_loops
= value
;
1384 if (!opts_set
->x_flag_peel_loops
)
1385 opts
->x_flag_peel_loops
= value
;
1386 if (!opts_set
->x_flag_tracer
)
1387 opts
->x_flag_tracer
= value
;
1388 if (!opts_set
->x_flag_value_profile_transformations
)
1389 opts
->x_flag_value_profile_transformations
= value
;
1390 if (!opts_set
->x_flag_inline_functions
)
1391 opts
->x_flag_inline_functions
= value
;
1392 if (!opts_set
->x_flag_ipa_cp
)
1393 opts
->x_flag_ipa_cp
= value
;
1394 if (!opts_set
->x_flag_ipa_cp_clone
1395 && value
&& opts
->x_flag_ipa_cp
)
1396 opts
->x_flag_ipa_cp_clone
= value
;
1397 if (!opts_set
->x_flag_ipa_cp_alignment
1398 && value
&& opts
->x_flag_ipa_cp
)
1399 opts
->x_flag_ipa_cp_alignment
= value
;
1400 if (!opts_set
->x_flag_predictive_commoning
)
1401 opts
->x_flag_predictive_commoning
= value
;
1402 if (!opts_set
->x_flag_unswitch_loops
)
1403 opts
->x_flag_unswitch_loops
= value
;
1404 if (!opts_set
->x_flag_gcse_after_reload
)
1405 opts
->x_flag_gcse_after_reload
= value
;
1406 if (!opts_set
->x_flag_tree_loop_vectorize
1407 && !opts_set
->x_flag_tree_vectorize
)
1408 opts
->x_flag_tree_loop_vectorize
= value
;
1409 if (!opts_set
->x_flag_tree_slp_vectorize
1410 && !opts_set
->x_flag_tree_vectorize
)
1411 opts
->x_flag_tree_slp_vectorize
= value
;
1412 if (!opts_set
->x_flag_vect_cost_model
)
1413 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1414 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1415 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1418 /* Handle target- and language-independent options. Return zero to
1419 generate an "unknown option" message. Only options that need
1420 extra handling need to be listed here; if you simply want
1421 DECODED->value assigned to a variable, it happens automatically. */
1424 common_handle_option (struct gcc_options
*opts
,
1425 struct gcc_options
*opts_set
,
1426 const struct cl_decoded_option
*decoded
,
1427 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1429 const struct cl_option_handlers
*handlers
,
1430 diagnostic_context
*dc
)
1432 size_t scode
= decoded
->opt_index
;
1433 const char *arg
= decoded
->arg
;
1434 int value
= decoded
->value
;
1435 enum opt_code code
= (enum opt_code
) scode
;
1437 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1442 handle_param (opts
, opts_set
, loc
, arg
);
1447 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1448 unsigned int undoc_mask
;
1451 if (lang_mask
== CL_DRIVER
)
1454 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1457 /* First display any single language specific options. */
1458 for (i
= 0; i
< cl_lang_count
; i
++)
1460 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1462 /* Next display any multi language specific options. */
1463 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1464 /* Then display any remaining, non-language options. */
1465 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1467 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1468 opts
->x_exit_after_options
= true;
1472 case OPT__target_help
:
1473 if (lang_mask
== CL_DRIVER
)
1476 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1477 opts
->x_exit_after_options
= true;
1482 const char * a
= arg
;
1483 unsigned int include_flags
= 0;
1484 /* Note - by default we include undocumented options when listing
1485 specific classes. If you only want to see documented options
1486 then add ",^undocumented" to the --help= option. E.g.:
1488 --help=target,^undocumented */
1489 unsigned int exclude_flags
= 0;
1491 if (lang_mask
== CL_DRIVER
)
1494 /* Walk along the argument string, parsing each word in turn.
1496 arg = [^]{word}[,{arg}]
1497 word = {optimizers|target|warnings|undocumented|
1498 params|common|<language>} */
1503 const char * string
;
1508 { "optimizers", CL_OPTIMIZATION
},
1509 { "target", CL_TARGET
},
1510 { "warnings", CL_WARNING
},
1511 { "undocumented", CL_UNDOCUMENTED
},
1512 { "params", CL_PARAMS
},
1513 { "joined", CL_JOINED
},
1514 { "separate", CL_SEPARATE
},
1515 { "common", CL_COMMON
},
1518 unsigned int * pflags
;
1520 unsigned int lang_flag
, specific_flag
;
1527 pflags
= & exclude_flags
;
1530 pflags
= & include_flags
;
1532 comma
= strchr (a
, ',');
1543 /* Check to see if the string matches an option class name. */
1544 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1545 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1547 specific_flag
= specifics
[i
].flag
;
1551 /* Check to see if the string matches a language name.
1552 Note - we rely upon the alpha-sorted nature of the entries in
1553 the lang_names array, specifically that shorter names appear
1554 before their longer variants. (i.e. C before C++). That way
1555 when we are attempting to match --help=c for example we will
1556 match with C first and not C++. */
1557 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1558 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1560 lang_flag
= 1U << i
;
1564 if (specific_flag
!= 0)
1567 * pflags
|= specific_flag
;
1570 /* The option's argument matches both the start of a
1571 language name and the start of an option class name.
1572 We have a special case for when the user has
1573 specified "--help=c", but otherwise we have to issue
1575 if (strncasecmp (a
, "c", len
) == 0)
1576 * pflags
|= lang_flag
;
1579 "--help argument %q.*s is ambiguous, "
1580 "please be more specific",
1584 else if (lang_flag
!= 0)
1585 * pflags
|= lang_flag
;
1588 "unrecognized argument to --help= option: %q.*s",
1597 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1599 opts
->x_exit_after_options
= true;
1604 if (lang_mask
== CL_DRIVER
)
1607 opts
->x_exit_after_options
= true;
1610 case OPT_fsanitize_
:
1611 case OPT_fsanitize_recover_
:
1613 const char *p
= arg
;
1615 = code
== OPT_fsanitize_
? &opts
->x_flag_sanitize
1616 : &opts
->x_flag_sanitize_recover
;
1621 const char *const name
;
1626 { "address", SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
,
1627 sizeof "address" - 1 },
1628 { "kernel-address", SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
,
1629 sizeof "kernel-address" - 1 },
1630 { "thread", SANITIZE_THREAD
, sizeof "thread" - 1 },
1631 { "leak", SANITIZE_LEAK
, sizeof "leak" - 1 },
1632 { "shift", SANITIZE_SHIFT
, sizeof "shift" - 1 },
1633 { "integer-divide-by-zero", SANITIZE_DIVIDE
,
1634 sizeof "integer-divide-by-zero" - 1 },
1635 { "undefined", SANITIZE_UNDEFINED
, sizeof "undefined" - 1 },
1636 { "unreachable", SANITIZE_UNREACHABLE
,
1637 sizeof "unreachable" - 1 },
1638 { "vla-bound", SANITIZE_VLA
, sizeof "vla-bound" - 1 },
1639 { "return", SANITIZE_RETURN
, sizeof "return" - 1 },
1640 { "null", SANITIZE_NULL
, sizeof "null" - 1 },
1641 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW
,
1642 sizeof "signed-integer-overflow" -1 },
1643 { "bool", SANITIZE_BOOL
, sizeof "bool" - 1 },
1644 { "enum", SANITIZE_ENUM
, sizeof "enum" - 1 },
1645 { "float-divide-by-zero", SANITIZE_FLOAT_DIVIDE
,
1646 sizeof "float-divide-by-zero" - 1 },
1647 { "float-cast-overflow", SANITIZE_FLOAT_CAST
,
1648 sizeof "float-cast-overflow" - 1 },
1649 { "bounds", SANITIZE_BOUNDS
, sizeof "bounds" - 1 },
1650 { "bounds-strict", SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
,
1651 sizeof "bounds-strict" - 1 },
1652 { "alignment", SANITIZE_ALIGNMENT
, sizeof "alignment" - 1 },
1653 { "nonnull-attribute", SANITIZE_NONNULL_ATTRIBUTE
,
1654 sizeof "nonnull-attribute" - 1 },
1655 { "returns-nonnull-attribute",
1656 SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1657 sizeof "returns-nonnull-attribute" - 1 },
1658 { "object-size", SANITIZE_OBJECT_SIZE
,
1659 sizeof "object-size" - 1 },
1660 { "vptr", SANITIZE_VPTR
, sizeof "vptr" - 1 },
1661 { "all", ~0, sizeof "all" - 1 },
1668 comma
= strchr (p
, ',');
1679 /* Check to see if the string matches an option class name. */
1680 for (i
= 0; spec
[i
].name
!= NULL
; ++i
)
1681 if (len
== spec
[i
].len
1682 && memcmp (p
, spec
[i
].name
, len
) == 0)
1684 /* Handle both -fsanitize and -fno-sanitize cases. */
1685 if (value
&& spec
[i
].flag
== ~0U)
1687 if (code
== OPT_fsanitize_
)
1688 error_at (loc
, "-fsanitize=all option is not valid");
1690 *flag
|= ~(SANITIZE_USER_ADDRESS
| SANITIZE_THREAD
1694 *flag
|= spec
[i
].flag
;
1696 *flag
&= ~spec
[i
].flag
;
1703 "unrecognized argument to -fsanitize%s= option: %q.*s",
1704 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1711 if (code
!= OPT_fsanitize_
)
1714 /* Kernel ASan implies normal ASan but does not yet support
1716 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1718 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
, 0,
1719 opts
->x_param_values
,
1720 opts_set
->x_param_values
);
1721 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0,
1722 opts
->x_param_values
,
1723 opts_set
->x_param_values
);
1724 maybe_set_param_value (PARAM_ASAN_STACK
, 0,
1725 opts
->x_param_values
,
1726 opts_set
->x_param_values
);
1727 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1728 opts
->x_param_values
,
1729 opts_set
->x_param_values
);
1735 case OPT_fasan_shadow_offset_
:
1739 case OPT_fsanitize_recover
:
1741 opts
->x_flag_sanitize_recover
1742 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1744 opts
->x_flag_sanitize_recover
1745 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1752 /* Currently handled in a prescan. */
1756 dc
->warning_as_error_requested
= value
;
1760 if (lang_mask
== CL_DRIVER
)
1763 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1764 opts
, opts_set
, loc
, dc
);
1767 case OPT_Wlarger_than_
:
1768 opts
->x_larger_than_size
= value
;
1769 opts
->x_warn_larger_than
= value
!= -1;
1772 case OPT_Wfatal_errors
:
1773 dc
->fatal_errors
= value
;
1776 case OPT_Wframe_larger_than_
:
1777 opts
->x_frame_larger_than_size
= value
;
1778 opts
->x_warn_frame_larger_than
= value
!= -1;
1781 case OPT_Wstack_usage_
:
1782 opts
->x_warn_stack_usage
= value
;
1783 opts
->x_flag_stack_usage_info
= value
!= -1;
1786 case OPT_Wstrict_aliasing
:
1787 set_Wstrict_aliasing (opts
, value
);
1790 case OPT_Wstrict_overflow
:
1791 opts
->x_warn_strict_overflow
= (value
1792 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1796 case OPT_Wsystem_headers
:
1797 dc
->dc_warn_system_headers
= value
;
1801 opts
->x_flag_gen_aux_info
= 1;
1804 case OPT_auxbase_strip
:
1806 char *tmp
= xstrdup (arg
);
1807 strip_off_ending (tmp
, strlen (tmp
));
1809 opts
->x_aux_base_name
= tmp
;
1816 decode_d_option (arg
, opts
, loc
, dc
);
1819 case OPT_fcall_used_
:
1820 case OPT_fcall_saved_
:
1828 case OPT_fdbg_cnt_list
:
1830 opts
->x_exit_after_options
= true;
1833 case OPT_fdebug_prefix_map_
:
1837 case OPT_fdiagnostics_show_location_
:
1838 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1841 case OPT_fdiagnostics_show_caret
:
1842 dc
->show_caret
= value
;
1845 case OPT_fdiagnostics_color_
:
1846 diagnostic_color_init (dc
, value
);
1849 case OPT_fdiagnostics_show_option
:
1850 dc
->show_option_requested
= value
;
1857 case OPT_ffast_math
:
1858 set_fast_math_flags (opts
, value
);
1861 case OPT_funsafe_math_optimizations
:
1862 set_unsafe_math_optimizations_flags (opts
, value
);
1869 case OPT_finline_limit_
:
1870 set_param_value ("max-inline-insns-single", value
/ 2,
1871 opts
->x_param_values
, opts_set
->x_param_values
);
1872 set_param_value ("max-inline-insns-auto", value
/ 2,
1873 opts
->x_param_values
, opts_set
->x_param_values
);
1876 case OPT_finstrument_functions_exclude_function_list_
:
1877 add_comma_separated_to_vector
1878 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1881 case OPT_finstrument_functions_exclude_file_list_
:
1882 add_comma_separated_to_vector
1883 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1886 case OPT_fmessage_length_
:
1887 pp_set_line_maximum_length (dc
->printer
, value
);
1888 diagnostic_set_caret_max_width (dc
, value
);
1892 case OPT_fopt_info_
:
1900 #ifndef ACCEL_COMPILER
1901 case OPT_foffload_abi_
:
1902 error_at (loc
, "-foffload-abi option can be specified only for "
1903 "offload compiler");
1907 case OPT_fpack_struct_
:
1908 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1910 "structure alignment must be a small power of two, not %d",
1913 opts
->x_initial_max_fld_align
= value
;
1917 case OPT_fplugin_arg_
:
1921 case OPT_fprofile_use_
:
1922 opts
->x_profile_data_prefix
= xstrdup (arg
);
1923 opts
->x_flag_profile_use
= true;
1925 /* No break here - do -fprofile-use processing. */
1926 case OPT_fprofile_use
:
1927 enable_fdo_optimizations (opts
, opts_set
, value
);
1928 if (!opts_set
->x_flag_profile_reorder_functions
)
1929 opts
->x_flag_profile_reorder_functions
= value
;
1930 /* Indirect call profiling should do all useful transformations
1931 speculative devirtualization does. */
1932 if (!opts_set
->x_flag_devirtualize_speculatively
1933 && opts
->x_flag_value_profile_transformations
)
1934 opts
->x_flag_devirtualize_speculatively
= false;
1937 case OPT_fauto_profile_
:
1938 opts
->x_auto_profile_file
= xstrdup (arg
);
1939 opts
->x_flag_auto_profile
= true;
1941 /* No break here - do -fauto-profile processing. */
1942 case OPT_fauto_profile
:
1943 enable_fdo_optimizations (opts
, opts_set
, value
);
1944 if (!opts_set
->x_flag_profile_correction
)
1945 opts
->x_flag_profile_correction
= value
;
1946 maybe_set_param_value (
1947 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1948 opts
->x_param_values
, opts_set
->x_param_values
);
1951 case OPT_fprofile_generate_
:
1952 opts
->x_profile_data_prefix
= xstrdup (arg
);
1954 /* No break here - do -fprofile-generate processing. */
1955 case OPT_fprofile_generate
:
1956 if (!opts_set
->x_profile_arc_flag
)
1957 opts
->x_profile_arc_flag
= value
;
1958 if (!opts_set
->x_flag_profile_values
)
1959 opts
->x_flag_profile_values
= value
;
1960 if (!opts_set
->x_flag_inline_functions
)
1961 opts
->x_flag_inline_functions
= value
;
1962 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1963 quadratic. Disable the pass until better memory representation
1965 if (!opts_set
->x_flag_ipa_reference
)
1966 opts
->x_flag_ipa_reference
= false;
1969 case OPT_ftree_vectorize
:
1970 if (!opts_set
->x_flag_tree_loop_vectorize
)
1971 opts
->x_flag_tree_loop_vectorize
= value
;
1972 if (!opts_set
->x_flag_tree_slp_vectorize
)
1973 opts
->x_flag_tree_slp_vectorize
= value
;
1975 case OPT_fshow_column
:
1976 dc
->show_column
= value
;
1979 case OPT_frandom_seed
:
1980 /* The real switch is -fno-random-seed. */
1986 case OPT_frandom_seed_
:
1990 case OPT_fsched_verbose_
:
1991 #ifdef INSN_SCHEDULING
1992 /* Handled with Var in common.opt. */
1998 case OPT_fsched_stalled_insns_
:
1999 opts
->x_flag_sched_stalled_insns
= value
;
2000 if (opts
->x_flag_sched_stalled_insns
== 0)
2001 opts
->x_flag_sched_stalled_insns
= -1;
2004 case OPT_fsched_stalled_insns_dep_
:
2005 opts
->x_flag_sched_stalled_insns_dep
= value
;
2008 case OPT_fstack_check_
:
2009 if (!strcmp (arg
, "no"))
2010 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
2011 else if (!strcmp (arg
, "generic"))
2012 /* This is the old stack checking method. */
2013 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2014 ? FULL_BUILTIN_STACK_CHECK
2015 : GENERIC_STACK_CHECK
;
2016 else if (!strcmp (arg
, "specific"))
2017 /* This is the new stack checking method. */
2018 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
2019 ? FULL_BUILTIN_STACK_CHECK
2020 : STACK_CHECK_STATIC_BUILTIN
2021 ? STATIC_BUILTIN_STACK_CHECK
2022 : GENERIC_STACK_CHECK
;
2024 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
2027 case OPT_fstack_limit
:
2028 /* The real switch is -fno-stack-limit. */
2034 case OPT_fstack_limit_register_
:
2035 case OPT_fstack_limit_symbol_
:
2039 case OPT_fstack_usage
:
2040 opts
->x_flag_stack_usage
= value
;
2041 opts
->x_flag_stack_usage_info
= value
!= 0;
2045 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
2050 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2054 if (arg
&& strlen (arg
) != 0)
2056 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2057 "use %<-gdwarf-%s%> for DWARF version "
2058 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2062 value
= opts
->x_dwarf_version
;
2066 if (value
< 2 || value
> 5)
2067 error_at (loc
, "dwarf version %d is not supported", value
);
2069 opts
->x_dwarf_version
= value
;
2070 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2073 case OPT_gsplit_dwarf
:
2074 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2079 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2084 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2089 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2094 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2100 /* Handled completely via specs. */
2103 case OPT_pedantic_errors
:
2104 dc
->pedantic_errors
= 1;
2105 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
2107 handlers
, opts
, opts_set
,
2112 opts
->x_flag_lto
= value
? "" : NULL
;
2116 dc
->dc_inhibit_warnings
= true;
2119 case OPT_fmax_errors_
:
2120 dc
->max_errors
= value
;
2123 case OPT_fuse_ld_bfd
:
2124 case OPT_fuse_ld_gold
:
2125 case OPT_fuse_linker_plugin
:
2126 /* No-op. Used by the driver and passed to us because it starts with f.*/
2131 opts
->x_flag_trapv
= 0;
2136 opts
->x_flag_wrapv
= 0;
2140 opts
->x_flag_ipa_icf_functions
= value
;
2141 opts
->x_flag_ipa_icf_variables
= value
;
2145 /* If the flag was handled in a standard way, assume the lack of
2146 processing here is intentional. */
2147 gcc_assert (option_flag_var (scode
, opts
));
2151 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2156 /* Handle --param NAME=VALUE. */
2158 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2159 location_t loc
, const char *carg
)
2164 arg
= xstrdup (carg
);
2165 equal
= strchr (arg
, '=');
2167 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2173 enum compiler_param index
;
2174 if (!find_param (arg
, &index
))
2175 error_at (loc
, "invalid --param name %qs", arg
);
2178 if (!param_string_value_p (index
, equal
+ 1, &value
))
2179 value
= integral_argument (equal
+ 1);
2182 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2184 set_param_value (arg
, value
,
2185 opts
->x_param_values
, opts_set
->x_param_values
);
2192 /* Used to set the level of strict aliasing warnings in OPTS,
2193 when no level is specified (i.e., when -Wstrict-aliasing, and not
2194 -Wstrict-aliasing=level was given).
2195 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2196 and 0 otherwise. After calling this function, wstrict_aliasing will be
2197 set to the default value of -Wstrict_aliasing=level, currently 3. */
2199 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2201 gcc_assert (onoff
== 0 || onoff
== 1);
2203 opts
->x_warn_strict_aliasing
= 3;
2205 opts
->x_warn_strict_aliasing
= 0;
2208 /* The following routines are useful in setting all the flags that
2209 -ffast-math and -fno-fast-math imply. */
2211 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2213 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2215 opts
->x_flag_unsafe_math_optimizations
= set
;
2216 set_unsafe_math_optimizations_flags (opts
, set
);
2218 if (!opts
->frontend_set_flag_finite_math_only
)
2219 opts
->x_flag_finite_math_only
= set
;
2220 if (!opts
->frontend_set_flag_errno_math
)
2221 opts
->x_flag_errno_math
= !set
;
2224 if (!opts
->frontend_set_flag_signaling_nans
)
2225 opts
->x_flag_signaling_nans
= 0;
2226 if (!opts
->frontend_set_flag_rounding_math
)
2227 opts
->x_flag_rounding_math
= 0;
2228 if (!opts
->frontend_set_flag_cx_limited_range
)
2229 opts
->x_flag_cx_limited_range
= 1;
2233 /* When -funsafe-math-optimizations is set the following
2234 flags are set as well. */
2236 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2238 if (!opts
->frontend_set_flag_trapping_math
)
2239 opts
->x_flag_trapping_math
= !set
;
2240 if (!opts
->frontend_set_flag_signed_zeros
)
2241 opts
->x_flag_signed_zeros
= !set
;
2242 if (!opts
->frontend_set_flag_associative_math
)
2243 opts
->x_flag_associative_math
= set
;
2244 if (!opts
->frontend_set_flag_reciprocal_math
)
2245 opts
->x_flag_reciprocal_math
= set
;
2248 /* Return true iff flags in OPTS are set as if -ffast-math. */
2250 fast_math_flags_set_p (const struct gcc_options
*opts
)
2252 return (!opts
->x_flag_trapping_math
2253 && opts
->x_flag_unsafe_math_optimizations
2254 && opts
->x_flag_finite_math_only
2255 && !opts
->x_flag_signed_zeros
2256 && !opts
->x_flag_errno_math
);
2259 /* Return true iff flags are set as if -ffast-math but using the flags stored
2260 in the struct cl_optimization structure. */
2262 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2264 return (!opt
->x_flag_trapping_math
2265 && opt
->x_flag_unsafe_math_optimizations
2266 && opt
->x_flag_finite_math_only
2267 && !opt
->x_flag_signed_zeros
2268 && !opt
->x_flag_errno_math
);
2271 /* Handle a debug output -g switch for options OPTS
2272 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2273 explicitly), location LOC. EXTENDED is true or false to support
2274 extended output (2 is special and means "-ggdb" was given). */
2276 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2277 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2280 opts
->x_use_gnu_debug_info_extensions
= extended
;
2282 if (type
== NO_DEBUG
)
2284 if (opts
->x_write_symbols
== NO_DEBUG
)
2286 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2290 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2291 opts
->x_write_symbols
= DWARF2_DEBUG
;
2292 #elif defined DBX_DEBUGGING_INFO
2293 opts
->x_write_symbols
= DBX_DEBUG
;
2297 if (opts
->x_write_symbols
== NO_DEBUG
)
2298 warning_at (loc
, 0, "target system does not support debug output");
2303 /* Does it conflict with an already selected type? */
2304 if (opts_set
->x_write_symbols
!= NO_DEBUG
2305 && opts
->x_write_symbols
!= NO_DEBUG
2306 && type
!= opts
->x_write_symbols
)
2307 error_at (loc
, "debug format %qs conflicts with prior selection",
2308 debug_type_names
[type
]);
2309 opts
->x_write_symbols
= type
;
2310 opts_set
->x_write_symbols
= type
;
2313 /* A debug flag without a level defaults to level 2.
2314 If off or at level 1, set it to level 2, but if already
2315 at level 3, don't lower it. */
2318 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2319 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2323 int argval
= integral_argument (arg
);
2325 error_at (loc
, "unrecognised debug output level %qs", arg
);
2326 else if (argval
> 3)
2327 error_at (loc
, "debug output level %qs is too high", arg
);
2329 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2333 /* Arrange to dump core on error for diagnostic context DC. (The
2334 regular error message is still printed first, except in the case of
2338 setup_core_dumping (diagnostic_context
*dc
)
2341 signal (SIGABRT
, SIG_DFL
);
2343 #if defined(HAVE_SETRLIMIT)
2346 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2347 fatal_error (input_location
, "getting core file size maximum limit: %m");
2348 rlim
.rlim_cur
= rlim
.rlim_max
;
2349 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2350 fatal_error (input_location
,
2351 "setting core file size limit to maximum: %m");
2354 diagnostic_abort_on_error (dc
);
2357 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2358 diagnostic context DC. */
2361 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2362 location_t loc
, diagnostic_context
*dc
)
2370 opts
->x_flag_debug_asm
= 1;
2373 opts
->x_flag_print_asm_name
= 1;
2376 opts
->x_flag_dump_rtl_in_asm
= 1;
2377 opts
->x_flag_print_asm_name
= 1;
2380 opts
->x_rtl_dump_and_exit
= 1;
2382 case 'D': /* These are handled by the preprocessor. */
2389 setup_core_dumping (dc
);
2392 opts
->x_flag_dump_all_passed
= true;
2396 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2401 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2402 mask LANG_MASK, option handlers HANDLERS) as an error for option
2403 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2404 NULL), location LOC. This is used by -Werror=. */
2407 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2408 const struct cl_option_handlers
*handlers
,
2409 struct gcc_options
*opts
,
2410 struct gcc_options
*opts_set
,
2411 location_t loc
, diagnostic_context
*dc
)
2416 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2417 new_option
[0] = 'W';
2418 strcpy (new_option
+ 1, arg
);
2419 option_index
= find_opt (new_option
, lang_mask
);
2420 if (option_index
== OPT_SPECIAL_unknown
)
2421 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2422 else if (!(cl_options
[option_index
].flags
& CL_WARNING
))
2423 error_at (loc
, "-Werror=%s: -%s is not an option that controls warnings",
2427 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2429 control_warning_option (option_index
, (int) kind
, value
,
2431 handlers
, opts
, opts_set
, dc
);
2436 /* Return malloced memory for the name of the option OPTION_INDEX
2437 which enabled a diagnostic (context CONTEXT), originally of type
2438 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2442 option_name (diagnostic_context
*context
, int option_index
,
2443 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2447 /* A warning classified as an error. */
2448 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2449 && diag_kind
== DK_ERROR
)
2450 return concat (cl_options
[OPT_Werror_
].opt_text
,
2451 /* Skip over "-W". */
2452 cl_options
[option_index
].opt_text
+ 2,
2454 /* A warning with option. */
2456 return xstrdup (cl_options
[option_index
].opt_text
);
2458 /* A warning without option classified as an error. */
2459 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2460 || diag_kind
== DK_WARNING
)
2461 && context
->warning_as_error_requested
)
2462 return xstrdup (cl_options
[OPT_Werror
].opt_text
);