1 /* Command line option handling.
2 Copyright (C) 2002-2014 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"
27 #include "tm.h" /* For STACK_CHECK_BUILTIN,
28 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
29 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
32 #include "diagnostic.h"
33 #include "diagnostic-color.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
40 /* Indexed by enum debug_info_type. */
41 const char *const debug_type_names
[] =
43 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
46 /* Parse the -femit-struct-debug-detailed option value
47 and set the flag variables. */
49 #define MATCH( prefix, string ) \
50 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
51 ? ((string += sizeof prefix - 1), 1) : 0)
54 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
57 /* various labels for comparison */
58 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
59 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
60 static const char none_lbl
[] = "none", any_lbl
[] = "any";
61 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
63 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
64 /* Default is to apply to as much as possible. */
65 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
69 if (MATCH (dfn_lbl
, spec
))
70 usage
= DINFO_USAGE_DFN
;
71 else if (MATCH (dir_lbl
, spec
))
72 usage
= DINFO_USAGE_DIR_USE
;
73 else if (MATCH (ind_lbl
, spec
))
74 usage
= DINFO_USAGE_IND_USE
;
76 /* Generics or not? */
77 if (MATCH (ord_lbl
, spec
))
79 else if (MATCH (gen_lbl
, spec
))
82 /* What allowable environment? */
83 if (MATCH (none_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_NONE
;
85 else if (MATCH (any_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_ANY
;
87 else if (MATCH (sys_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_SYS
;
89 else if (MATCH (base_lbl
, spec
))
90 files
= DINFO_STRUCT_FILE_BASE
;
93 "argument %qs to %<-femit-struct-debug-detailed%> "
97 /* Effect the specification. */
98 if (usage
== DINFO_USAGE_NUM_ENUMS
)
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
103 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
104 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
109 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
110 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
116 opts
->x_debug_struct_ordinary
[usage
] = files
;
118 opts
->x_debug_struct_generic
[usage
] = files
;
122 set_struct_debug_option (opts
, loc
, spec
+1);
125 /* No more -femit-struct-debug-detailed specifications.
129 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
131 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
132 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
133 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
134 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
136 "%<-femit-struct-debug-detailed=dir:...%> must allow "
137 "at least as much as "
138 "%<-femit-struct-debug-detailed=ind:...%>");
142 /* Strip off a legitimate source ending from the input string NAME of
143 length LEN. Rather than having to know the names used by all of
144 our front ends, we strip off an ending of a period followed by
145 up to five characters. (Java uses ".class".) */
148 strip_off_ending (char *name
, int len
)
151 for (i
= 2; i
< 6 && len
> i
; i
++)
153 if (name
[len
- i
] == '.')
155 name
[len
- i
] = '\0';
161 /* Find the base name of a path, stripping off both directories and
162 a single final extension. */
164 base_of_path (const char *path
, const char **base_out
)
166 const char *base
= path
;
168 const char *p
= path
;
172 if (IS_DIR_SEPARATOR (c
))
187 /* What to print when a switch has no documentation. */
188 static const char undocumented_msg
[] = N_("This switch lacks documentation");
190 typedef char *char_p
; /* For DEF_VEC_P. */
192 static void handle_param (struct gcc_options
*opts
,
193 struct gcc_options
*opts_set
, location_t loc
,
195 static void set_debug_level (enum debug_info_type type
, int extended
,
196 const char *arg
, struct gcc_options
*opts
,
197 struct gcc_options
*opts_set
,
199 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
200 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
201 location_t loc
, diagnostic_context
*dc
);
202 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
204 static void enable_warning_as_error (const char *arg
, int value
,
205 unsigned int lang_mask
,
206 const struct cl_option_handlers
*handlers
,
207 struct gcc_options
*opts
,
208 struct gcc_options
*opts_set
,
210 diagnostic_context
*dc
);
212 /* Handle a back-end option; arguments and return value as for
216 target_handle_option (struct gcc_options
*opts
,
217 struct gcc_options
*opts_set
,
218 const struct cl_decoded_option
*decoded
,
219 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
221 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
222 diagnostic_context
*dc
)
224 gcc_assert (dc
== global_dc
);
225 gcc_assert (kind
== DK_UNSPECIFIED
);
226 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
229 /* Add comma-separated strings to a char_p vector. */
232 add_comma_separated_to_vector (void **pvec
, const char *arg
)
238 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
240 vec_check_alloc (v
, 1);
242 /* We never free this string. */
255 v
->safe_push (token_start
);
258 if (*r
== '\\' && r
[1] == ',')
266 if (*token_start
!= '\0')
267 v
->safe_push (token_start
);
272 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
275 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
277 size_t num_params
= get_num_compiler_params ();
279 gcc_obstack_init (&opts_obstack
);
281 *opts
= global_options_init
;
284 memset (opts_set
, 0, sizeof (*opts_set
));
286 opts
->x_param_values
= XNEWVEC (int, num_params
);
289 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
291 init_param_values (opts
->x_param_values
);
293 /* Initialize whether `char' is signed. */
294 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
295 /* Set this to a special "uninitialized" value. The actual default
296 is set after target options have been processed. */
297 opts
->x_flag_short_enums
= 2;
299 /* Initialize target_flags before default_options_optimization
300 so the latter can modify it. */
301 opts
->x_target_flags
= targetm_common
.default_target_flags
;
303 /* Some targets have ABI-specified unwind tables. */
304 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
306 /* Some targets have other target-specific initialization. */
307 targetm_common
.option_init_struct (opts
);
310 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
311 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
312 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
313 mask LANG_MASK and option handlers HANDLERS. */
316 maybe_default_option (struct gcc_options
*opts
,
317 struct gcc_options
*opts_set
,
318 const struct default_options
*default_opt
,
319 int level
, bool size
, bool fast
, bool debug
,
320 unsigned int lang_mask
,
321 const struct cl_option_handlers
*handlers
,
323 diagnostic_context
*dc
)
325 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
329 gcc_assert (level
== 2);
331 gcc_assert (level
== 3);
333 gcc_assert (level
== 1);
335 switch (default_opt
->levels
)
341 case OPT_LEVELS_0_ONLY
:
342 enabled
= (level
== 0);
345 case OPT_LEVELS_1_PLUS
:
346 enabled
= (level
>= 1);
349 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
350 enabled
= (level
>= 1 && !size
&& !debug
);
353 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
354 enabled
= (level
>= 1 && !debug
);
357 case OPT_LEVELS_2_PLUS
:
358 enabled
= (level
>= 2);
361 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
362 enabled
= (level
>= 2 && !size
&& !debug
);
365 case OPT_LEVELS_3_PLUS
:
366 enabled
= (level
>= 3);
369 case OPT_LEVELS_3_PLUS_AND_SIZE
:
370 enabled
= (level
>= 3 || size
);
373 case OPT_LEVELS_SIZE
:
377 case OPT_LEVELS_FAST
:
381 case OPT_LEVELS_NONE
:
387 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
388 default_opt
->arg
, default_opt
->value
,
389 lang_mask
, DK_UNSPECIFIED
, loc
,
391 else if (default_opt
->arg
== NULL
392 && !option
->cl_reject_negative
)
393 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
394 default_opt
->arg
, !default_opt
->value
,
395 lang_mask
, DK_UNSPECIFIED
, loc
,
399 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
400 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
401 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
402 language mask LANG_MASK and option handlers HANDLERS. */
405 maybe_default_options (struct gcc_options
*opts
,
406 struct gcc_options
*opts_set
,
407 const struct default_options
*default_opts
,
408 int level
, bool size
, bool fast
, bool debug
,
409 unsigned int lang_mask
,
410 const struct cl_option_handlers
*handlers
,
412 diagnostic_context
*dc
)
416 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
417 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
418 level
, size
, fast
, debug
,
419 lang_mask
, handlers
, loc
, dc
);
422 /* Table of options enabled by default at different levels. */
424 static const struct default_options default_options_table
[] =
426 /* -O1 optimizations. */
427 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
462 /* -O2 optimizations. */
463 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
475 #ifdef INSN_SCHEDULING
476 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
477 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
494 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
498 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
500 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
501 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_fuse_caller_save
, NULL
, 1 },
503 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
505 /* -O3 optimizations. */
506 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
507 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
508 /* Inlining of functions reducing size is a good idea with -Os
509 regardless of them being declared inline. */
510 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
511 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
512 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
513 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
514 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
515 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
516 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
517 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
518 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
520 /* -Ofast adds optimizations to -O3. */
521 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
523 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
526 /* Default the options in OPTS and OPTS_SET based on the optimization
527 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
529 default_options_optimization (struct gcc_options
*opts
,
530 struct gcc_options
*opts_set
,
531 struct cl_decoded_option
*decoded_options
,
532 unsigned int decoded_options_count
,
534 unsigned int lang_mask
,
535 const struct cl_option_handlers
*handlers
,
536 diagnostic_context
*dc
)
541 /* Scan to see what optimization level has been specified. That will
542 determine the default value of many flags. */
543 for (i
= 1; i
< decoded_options_count
; i
++)
545 struct cl_decoded_option
*opt
= &decoded_options
[i
];
546 switch (opt
->opt_index
)
549 if (*opt
->arg
== '\0')
551 opts
->x_optimize
= 1;
552 opts
->x_optimize_size
= 0;
553 opts
->x_optimize_fast
= 0;
554 opts
->x_optimize_debug
= 0;
558 const int optimize_val
= integral_argument (opt
->arg
);
559 if (optimize_val
== -1)
560 error_at (loc
, "argument to %<-O%> should be a non-negative "
561 "integer, %<g%>, %<s%> or %<fast%>");
564 opts
->x_optimize
= optimize_val
;
565 if ((unsigned int) opts
->x_optimize
> 255)
566 opts
->x_optimize
= 255;
567 opts
->x_optimize_size
= 0;
568 opts
->x_optimize_fast
= 0;
569 opts
->x_optimize_debug
= 0;
575 opts
->x_optimize_size
= 1;
577 /* Optimizing for size forces optimize to be 2. */
578 opts
->x_optimize
= 2;
579 opts
->x_optimize_fast
= 0;
580 opts
->x_optimize_debug
= 0;
584 /* -Ofast only adds flags to -O3. */
585 opts
->x_optimize_size
= 0;
586 opts
->x_optimize
= 3;
587 opts
->x_optimize_fast
= 1;
588 opts
->x_optimize_debug
= 0;
592 /* -Og selects optimization level 1. */
593 opts
->x_optimize_size
= 0;
594 opts
->x_optimize
= 1;
595 opts
->x_optimize_fast
= 0;
596 opts
->x_optimize_debug
= 1;
600 /* Ignore other options in this prescan. */
605 maybe_default_options (opts
, opts_set
, default_options_table
,
606 opts
->x_optimize
, opts
->x_optimize_size
,
607 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
608 lang_mask
, handlers
, loc
, dc
);
610 /* -O2 param settings. */
611 opt2
= (opts
->x_optimize
>= 2);
613 /* Track fields in field-sensitive alias analysis. */
614 maybe_set_param_value
615 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
616 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
617 opts
->x_param_values
, opts_set
->x_param_values
);
619 /* For -O1 only do loop invariant motion for very small loops. */
620 maybe_set_param_value
621 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
622 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
623 opts
->x_param_values
, opts_set
->x_param_values
);
625 /* At -Ofast, allow store motion to introduce potential race conditions. */
626 maybe_set_param_value
627 (PARAM_ALLOW_STORE_DATA_RACES
,
628 opts
->x_optimize_fast
? 1
629 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
630 opts
->x_param_values
, opts_set
->x_param_values
);
632 if (opts
->x_optimize_size
)
633 /* We want to crossjump as much as possible. */
634 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
635 opts
->x_param_values
, opts_set
->x_param_values
);
637 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
638 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
639 opts
->x_param_values
, opts_set
->x_param_values
);
641 /* Restrict the amount of work combine does at -Og while retaining
642 most of its useful transforms. */
643 if (opts
->x_optimize_debug
)
644 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
645 opts
->x_param_values
, opts_set
->x_param_values
);
647 /* Allow default optimizations to be specified on a per-machine basis. */
648 maybe_default_options (opts
, opts_set
,
649 targetm_common
.option_optimization_table
,
650 opts
->x_optimize
, opts
->x_optimize_size
,
651 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
652 lang_mask
, handlers
, loc
, dc
);
655 /* After all options at LOC have been read into OPTS and OPTS_SET,
656 finalize settings of those options and diagnose incompatible
659 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
662 enum unwind_info_type ui_except
;
664 if (opts
->x_dump_base_name
665 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
666 && ! opts
->x_dump_base_name_prefixed
)
668 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
669 OPTS->X_DUMP_DIR_NAME directory. Then try to make
670 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
671 directory, typically the directory to contain the object
673 if (opts
->x_dump_dir_name
)
674 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
675 opts
->x_dump_base_name
, NULL
);
676 else if (opts
->x_aux_base_name
677 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
679 const char *aux_base
;
681 base_of_path (opts
->x_aux_base_name
, &aux_base
);
682 if (opts
->x_aux_base_name
!= aux_base
)
684 int dir_len
= aux_base
- opts
->x_aux_base_name
;
685 char *new_dump_base_name
686 = XOBNEWVEC (&opts_obstack
, char,
687 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
689 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
690 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
691 /* Append existing OPTS->X_DUMP_BASE_NAME. */
692 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
693 opts
->x_dump_base_name
= new_dump_base_name
;
696 opts
->x_dump_base_name_prefixed
= true;
699 /* Handle related options for unit-at-a-time, toplevel-reorder, and
701 if (!opts
->x_flag_unit_at_a_time
)
703 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
704 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
706 opts
->x_flag_section_anchors
= 0;
707 if (opts
->x_flag_toplevel_reorder
== 1)
708 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
710 opts
->x_flag_toplevel_reorder
= 0;
713 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
714 sorry ("transactional memory is not supported with non-call exceptions");
716 /* Unless the user has asked for section anchors, we disable toplevel
717 reordering at -O0 to disable transformations that might be surprising
718 to end users and to get -fno-toplevel-reorder tested. */
719 if (!opts
->x_optimize
720 && opts
->x_flag_toplevel_reorder
== 2
721 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
723 opts
->x_flag_toplevel_reorder
= 0;
724 opts
->x_flag_section_anchors
= 0;
726 if (!opts
->x_flag_toplevel_reorder
)
728 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
729 error_at (loc
, "section anchors must be disabled when toplevel reorder"
731 opts
->x_flag_section_anchors
= 0;
734 if (!opts
->x_flag_opts_finished
)
736 if (opts
->x_flag_pie
)
737 opts
->x_flag_pic
= opts
->x_flag_pie
;
738 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
739 opts
->x_flag_shlib
= 1;
740 opts
->x_flag_opts_finished
= true;
743 if (opts
->x_optimize
== 0)
745 /* Inlining does not work if not optimizing,
746 so force it not to be done. */
747 opts
->x_warn_inline
= 0;
748 opts
->x_flag_no_inline
= 1;
751 /* The optimization to partition hot and cold basic blocks into separate
752 sections of the .o and executable files does not work (currently)
753 with exception handling. This is because there is no support for
754 generating unwind info. If opts->x_flag_exceptions is turned on
755 we need to turn off the partitioning optimization. */
757 ui_except
= targetm_common
.except_unwind_info (opts
);
759 if (opts
->x_flag_exceptions
760 && opts
->x_flag_reorder_blocks_and_partition
761 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
763 if (opts_set
->x_flag_reorder_blocks_and_partition
)
765 "-freorder-blocks-and-partition does not work "
766 "with exceptions on this architecture");
767 opts
->x_flag_reorder_blocks_and_partition
= 0;
768 opts
->x_flag_reorder_blocks
= 1;
771 /* If user requested unwind info, then turn off the partitioning
774 if (opts
->x_flag_unwind_tables
775 && !targetm_common
.unwind_tables_default
776 && opts
->x_flag_reorder_blocks_and_partition
777 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
779 if (opts_set
->x_flag_reorder_blocks_and_partition
)
781 "-freorder-blocks-and-partition does not support "
782 "unwind info on this architecture");
783 opts
->x_flag_reorder_blocks_and_partition
= 0;
784 opts
->x_flag_reorder_blocks
= 1;
787 /* If the target requested unwind info, then turn off the partitioning
788 optimization with a different message. Likewise, if the target does not
789 support named sections. */
791 if (opts
->x_flag_reorder_blocks_and_partition
792 && (!targetm_common
.have_named_sections
793 || (opts
->x_flag_unwind_tables
794 && targetm_common
.unwind_tables_default
795 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
797 if (opts_set
->x_flag_reorder_blocks_and_partition
)
799 "-freorder-blocks-and-partition does not work "
800 "on this architecture");
801 opts
->x_flag_reorder_blocks_and_partition
= 0;
802 opts
->x_flag_reorder_blocks
= 1;
805 if (opts
->x_flag_reorder_blocks_and_partition
806 && !opts_set
->x_flag_reorder_functions
)
807 opts
->x_flag_reorder_functions
= 1;
809 /* Pipelining of outer loops is only possible when general pipelining
810 capabilities are requested. */
811 if (!opts
->x_flag_sel_sched_pipelining
)
812 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
814 if (opts
->x_flag_conserve_stack
)
816 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
817 opts
->x_param_values
, opts_set
->x_param_values
);
818 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
819 opts
->x_param_values
, opts_set
->x_param_values
);
822 if (opts
->x_flag_lto
)
825 opts
->x_flag_generate_lto
= 1;
827 /* When generating IL, do not operate in whole-program mode.
828 Otherwise, symbols will be privatized too early, causing link
830 opts
->x_flag_whole_program
= 0;
832 error_at (loc
, "LTO support has not been enabled in this configuration");
834 if (!opts
->x_flag_fat_lto_objects
836 || (opts_set
->x_flag_use_linker_plugin
837 && !opts
->x_flag_use_linker_plugin
)))
839 if (opts_set
->x_flag_fat_lto_objects
)
840 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
841 opts
->x_flag_fat_lto_objects
= 1;
845 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
846 default value if they choose based on other options. */
847 if (opts
->x_flag_split_stack
== -1)
848 opts
->x_flag_split_stack
= 0;
849 else if (opts
->x_flag_split_stack
)
851 if (!targetm_common
.supports_split_stack (true, opts
))
853 error_at (loc
, "%<-fsplit-stack%> is not supported by "
854 "this compiler configuration");
855 opts
->x_flag_split_stack
= 0;
859 /* Tune vectorization related parametees according to cost model. */
860 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
862 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
863 6, opts
->x_param_values
, opts_set
->x_param_values
);
864 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
865 0, opts
->x_param_values
, opts_set
->x_param_values
);
866 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
867 0, opts
->x_param_values
, opts_set
->x_param_values
);
870 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
872 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
873 || !opts
->x_flag_tree_loop_if_convert
)
874 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
875 opts
->x_param_values
, opts_set
->x_param_values
);
877 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
878 if (opts
->x_dwarf_split_debug_info
)
879 opts
->x_debug_generate_pub_sections
= 2;
881 /* Userspace and kernel ASan conflict with each other. */
883 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
884 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
886 "-fsanitize=address is incompatible with "
887 "-fsanitize=kernel-address");
891 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
892 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
894 "-fsanitize=address and -fsanitize=kernel-address "
895 "are incompatible with -fsanitize=thread");
897 /* Error recovery is not allowed for ASan and TSan. */
899 if (opts
->x_flag_sanitize_recover
& SANITIZE_USER_ADDRESS
)
900 error_at (loc
, "-fsanitize-recover=address is not supported");
902 if (opts
->x_flag_sanitize_recover
& SANITIZE_THREAD
)
903 error_at (loc
, "-fsanitize-recover=thread is not supported");
905 if (opts
->x_flag_sanitize_recover
& SANITIZE_LEAK
)
906 error_at (loc
, "-fsanitize-recover=leak is not supported");
908 /* When instrumenting the pointers, we don't want to remove
909 the null pointer checks. */
910 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
911 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
912 opts
->x_flag_delete_null_pointer_checks
= 0;
914 /* Aggressive compiler optimizations may cause false negatives. */
915 if (opts
->x_flag_sanitize
)
917 opts
->x_flag_aggressive_loop_optimizations
= 0;
918 opts
->x_flag_strict_overflow
= 0;
922 #define LEFT_COLUMN 27
924 /* Output ITEM, of length ITEM_WIDTH, in the left column,
925 followed by word-wrapped HELP in a second column. */
927 wrap_help (const char *help
,
929 unsigned int item_width
,
930 unsigned int columns
)
932 unsigned int col_width
= LEFT_COLUMN
;
933 unsigned int remaining
, room
, len
;
935 remaining
= strlen (help
);
939 room
= columns
- 3 - MAX (col_width
, item_width
);
948 for (i
= 0; help
[i
]; i
++)
950 if (i
>= room
&& len
!= remaining
)
954 else if ((help
[i
] == '-' || help
[i
] == '/')
955 && help
[i
+ 1] != ' '
956 && i
> 0 && ISALPHA (help
[i
- 1]))
961 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
963 while (help
[len
] == ' ')
971 /* Print help for a specific front-end, etc. */
973 print_filtered_help (unsigned int include_flags
,
974 unsigned int exclude_flags
,
975 unsigned int any_flags
,
976 unsigned int columns
,
977 struct gcc_options
*opts
,
978 unsigned int lang_mask
)
983 bool displayed
= false;
986 if (include_flags
== CL_PARAMS
)
988 for (i
= 0; i
< LAST_PARAM
; i
++)
990 const char *param
= compiler_params
[i
].option
;
992 help
= compiler_params
[i
].help
;
993 if (help
== NULL
|| *help
== '\0')
995 if (exclude_flags
& CL_UNDOCUMENTED
)
997 help
= undocumented_msg
;
1000 /* Get the translation. */
1003 if (!opts
->x_quiet_flag
)
1005 snprintf (new_help
, sizeof (new_help
),
1006 _("default %d minimum %d maximum %d"),
1007 compiler_params
[i
].default_value
,
1008 compiler_params
[i
].min_value
,
1009 compiler_params
[i
].max_value
);
1012 wrap_help (help
, param
, strlen (param
), columns
);
1018 if (!opts
->x_help_printed
)
1019 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1021 if (!opts
->x_help_enum_printed
)
1022 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1024 for (i
= 0; i
< cl_options_count
; i
++)
1026 const struct cl_option
*option
= cl_options
+ i
;
1031 if (include_flags
== 0
1032 || ((option
->flags
& include_flags
) != include_flags
))
1034 if ((option
->flags
& any_flags
) == 0)
1038 /* Skip unwanted switches. */
1039 if ((option
->flags
& exclude_flags
) != 0)
1042 /* The driver currently prints its own help text. */
1043 if ((option
->flags
& CL_DRIVER
) != 0
1044 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1045 | CL_COMMON
| CL_TARGET
)) == 0)
1049 /* Skip switches that have already been printed. */
1050 if (opts
->x_help_printed
[i
])
1053 opts
->x_help_printed
[i
] = true;
1055 help
= option
->help
;
1058 if (exclude_flags
& CL_UNDOCUMENTED
)
1060 help
= undocumented_msg
;
1063 /* Get the translation. */
1066 /* Find the gap between the name of the
1067 option and its descriptive text. */
1068 tab
= strchr (help
, '\t');
1077 opt
= option
->opt_text
;
1081 /* With the -Q option enabled we change the descriptive text associated
1082 with an option to be an indication of its current setting. */
1083 if (!opts
->x_quiet_flag
)
1085 void *flag_var
= option_flag_var (i
, opts
);
1087 if (len
< (LEFT_COLUMN
+ 2))
1088 strcpy (new_help
, "\t\t");
1090 strcpy (new_help
, "\t");
1092 if (flag_var
!= NULL
1093 && option
->var_type
!= CLVC_DEFER
)
1095 if (option
->flags
& CL_JOINED
)
1097 if (option
->var_type
== CLVC_STRING
)
1099 if (* (const char **) flag_var
!= NULL
)
1100 snprintf (new_help
+ strlen (new_help
),
1101 sizeof (new_help
) - strlen (new_help
),
1102 * (const char **) flag_var
);
1104 else if (option
->var_type
== CLVC_ENUM
)
1106 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1108 const char *arg
= NULL
;
1110 value
= e
->get (flag_var
);
1111 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1113 arg
= _("[default]");
1114 snprintf (new_help
+ strlen (new_help
),
1115 sizeof (new_help
) - strlen (new_help
),
1119 sprintf (new_help
+ strlen (new_help
),
1120 "%#x", * (int *) flag_var
);
1123 strcat (new_help
, option_enabled (i
, opts
)
1124 ? _("[enabled]") : _("[disabled]"));
1130 wrap_help (help
, opt
, len
, columns
);
1133 if (option
->var_type
== CLVC_ENUM
1134 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1135 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1140 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1143 printf (_(" No options with the desired characteristics were found\n"));
1148 /* PR 31349: Tell the user how to see all of the
1149 options supported by a specific front end. */
1150 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1151 if ((1U << i
) & langs
)
1152 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1153 lang_names
[i
], lang_names
[i
]);
1157 else if (! displayed
)
1158 printf (_(" All options with the desired characteristics have already been displayed\n"));
1162 /* Print details of enumerated option arguments, if those
1163 enumerations have help text headings provided. If no help text
1164 is provided, presume that the possible values are listed in the
1165 help text for the relevant options. */
1166 for (i
= 0; i
< cl_enums_count
; i
++)
1168 unsigned int j
, pos
;
1170 if (opts
->x_help_enum_printed
[i
] != 1)
1172 if (cl_enums
[i
].help
== NULL
)
1174 printf (" %s\n ", _(cl_enums
[i
].help
));
1176 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1178 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1180 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1182 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1192 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1197 opts
->x_help_enum_printed
[i
] = 2;
1201 /* Display help for a specified type of option.
1202 The options must have ALL of the INCLUDE_FLAGS set
1203 ANY of the flags in the ANY_FLAGS set
1204 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1205 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1207 print_specific_help (unsigned int include_flags
,
1208 unsigned int exclude_flags
,
1209 unsigned int any_flags
,
1210 struct gcc_options
*opts
,
1211 unsigned int lang_mask
)
1213 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1214 const char * description
= NULL
;
1215 const char * descrip_extra
= "";
1219 /* Sanity check: Make sure that we do not have more
1220 languages than we have bits available to enumerate them. */
1221 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1223 /* If we have not done so already, obtain
1224 the desired maximum width of the output. */
1225 if (opts
->x_help_columns
== 0)
1229 p
= getenv ("COLUMNS");
1232 int value
= atoi (p
);
1235 opts
->x_help_columns
= value
;
1238 if (opts
->x_help_columns
== 0)
1239 /* Use a reasonable default. */
1240 opts
->x_help_columns
= 80;
1243 /* Decide upon the title for the options that we are going to display. */
1244 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1246 switch (flag
& include_flags
)
1253 description
= _("The following options are target specific");
1256 description
= _("The following options control compiler warning messages");
1258 case CL_OPTIMIZATION
:
1259 description
= _("The following options control optimizations");
1262 description
= _("The following options are language-independent");
1265 description
= _("The --param option recognizes the following as parameters");
1268 if (i
>= cl_lang_count
)
1270 if (exclude_flags
& all_langs_mask
)
1271 description
= _("The following options are specific to just the language ");
1273 description
= _("The following options are supported by the language ");
1274 descrip_extra
= lang_names
[i
];
1279 if (description
== NULL
)
1283 if (include_flags
& CL_UNDOCUMENTED
)
1284 description
= _("The following options are not documented");
1285 else if (include_flags
& CL_SEPARATE
)
1286 description
= _("The following options take separate arguments");
1287 else if (include_flags
& CL_JOINED
)
1288 description
= _("The following options take joined arguments");
1291 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1298 if (any_flags
& all_langs_mask
)
1299 description
= _("The following options are language-related");
1301 description
= _("The following options are language-independent");
1305 printf ("%s%s:\n", description
, descrip_extra
);
1306 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1307 opts
->x_help_columns
, opts
, lang_mask
);
1310 /* Enable FDO-related flags. */
1313 enable_fdo_optimizations (struct gcc_options
*opts
,
1314 struct gcc_options
*opts_set
,
1317 if (!opts_set
->x_flag_branch_probabilities
)
1318 opts
->x_flag_branch_probabilities
= value
;
1319 if (!opts_set
->x_flag_profile_values
)
1320 opts
->x_flag_profile_values
= value
;
1321 if (!opts_set
->x_flag_unroll_loops
)
1322 opts
->x_flag_unroll_loops
= value
;
1323 if (!opts_set
->x_flag_peel_loops
)
1324 opts
->x_flag_peel_loops
= value
;
1325 if (!opts_set
->x_flag_tracer
)
1326 opts
->x_flag_tracer
= value
;
1327 if (!opts_set
->x_flag_value_profile_transformations
)
1328 opts
->x_flag_value_profile_transformations
= value
;
1329 if (!opts_set
->x_flag_inline_functions
)
1330 opts
->x_flag_inline_functions
= value
;
1331 if (!opts_set
->x_flag_ipa_cp
)
1332 opts
->x_flag_ipa_cp
= value
;
1333 if (!opts_set
->x_flag_ipa_cp_clone
1334 && value
&& opts
->x_flag_ipa_cp
)
1335 opts
->x_flag_ipa_cp_clone
= value
;
1336 if (!opts_set
->x_flag_predictive_commoning
)
1337 opts
->x_flag_predictive_commoning
= value
;
1338 if (!opts_set
->x_flag_unswitch_loops
)
1339 opts
->x_flag_unswitch_loops
= value
;
1340 if (!opts_set
->x_flag_gcse_after_reload
)
1341 opts
->x_flag_gcse_after_reload
= value
;
1342 if (!opts_set
->x_flag_tree_loop_vectorize
1343 && !opts_set
->x_flag_tree_vectorize
)
1344 opts
->x_flag_tree_loop_vectorize
= value
;
1345 if (!opts_set
->x_flag_tree_slp_vectorize
1346 && !opts_set
->x_flag_tree_vectorize
)
1347 opts
->x_flag_tree_slp_vectorize
= value
;
1348 if (!opts_set
->x_flag_vect_cost_model
)
1349 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1350 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1351 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1354 /* Handle target- and language-independent options. Return zero to
1355 generate an "unknown option" message. Only options that need
1356 extra handling need to be listed here; if you simply want
1357 DECODED->value assigned to a variable, it happens automatically. */
1360 common_handle_option (struct gcc_options
*opts
,
1361 struct gcc_options
*opts_set
,
1362 const struct cl_decoded_option
*decoded
,
1363 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1365 const struct cl_option_handlers
*handlers
,
1366 diagnostic_context
*dc
)
1368 size_t scode
= decoded
->opt_index
;
1369 const char *arg
= decoded
->arg
;
1370 int value
= decoded
->value
;
1371 enum opt_code code
= (enum opt_code
) scode
;
1373 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1378 handle_param (opts
, opts_set
, loc
, arg
);
1383 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1384 unsigned int undoc_mask
;
1387 if (lang_mask
== CL_DRIVER
)
1390 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1393 /* First display any single language specific options. */
1394 for (i
= 0; i
< cl_lang_count
; i
++)
1396 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1398 /* Next display any multi language specific options. */
1399 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1400 /* Then display any remaining, non-language options. */
1401 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1403 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1404 opts
->x_exit_after_options
= true;
1408 case OPT__target_help
:
1409 if (lang_mask
== CL_DRIVER
)
1412 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1413 opts
->x_exit_after_options
= true;
1418 const char * a
= arg
;
1419 unsigned int include_flags
= 0;
1420 /* Note - by default we include undocumented options when listing
1421 specific classes. If you only want to see documented options
1422 then add ",^undocumented" to the --help= option. E.g.:
1424 --help=target,^undocumented */
1425 unsigned int exclude_flags
= 0;
1427 if (lang_mask
== CL_DRIVER
)
1430 /* Walk along the argument string, parsing each word in turn.
1432 arg = [^]{word}[,{arg}]
1433 word = {optimizers|target|warnings|undocumented|
1434 params|common|<language>} */
1439 const char * string
;
1444 { "optimizers", CL_OPTIMIZATION
},
1445 { "target", CL_TARGET
},
1446 { "warnings", CL_WARNING
},
1447 { "undocumented", CL_UNDOCUMENTED
},
1448 { "params", CL_PARAMS
},
1449 { "joined", CL_JOINED
},
1450 { "separate", CL_SEPARATE
},
1451 { "common", CL_COMMON
},
1454 unsigned int * pflags
;
1456 unsigned int lang_flag
, specific_flag
;
1463 pflags
= & exclude_flags
;
1466 pflags
= & include_flags
;
1468 comma
= strchr (a
, ',');
1479 /* Check to see if the string matches an option class name. */
1480 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1481 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1483 specific_flag
= specifics
[i
].flag
;
1487 /* Check to see if the string matches a language name.
1488 Note - we rely upon the alpha-sorted nature of the entries in
1489 the lang_names array, specifically that shorter names appear
1490 before their longer variants. (i.e. C before C++). That way
1491 when we are attempting to match --help=c for example we will
1492 match with C first and not C++. */
1493 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1494 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1496 lang_flag
= 1U << i
;
1500 if (specific_flag
!= 0)
1503 * pflags
|= specific_flag
;
1506 /* The option's argument matches both the start of a
1507 language name and the start of an option class name.
1508 We have a special case for when the user has
1509 specified "--help=c", but otherwise we have to issue
1511 if (strncasecmp (a
, "c", len
) == 0)
1512 * pflags
|= lang_flag
;
1515 "--help argument %q.*s is ambiguous, "
1516 "please be more specific",
1520 else if (lang_flag
!= 0)
1521 * pflags
|= lang_flag
;
1524 "unrecognized argument to --help= option: %q.*s",
1533 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1535 opts
->x_exit_after_options
= true;
1540 if (lang_mask
== CL_DRIVER
)
1543 opts
->x_exit_after_options
= true;
1546 case OPT_fsanitize_
:
1547 case OPT_fsanitize_recover_
:
1549 const char *p
= arg
;
1551 = code
== OPT_fsanitize_
? &opts
->x_flag_sanitize
1552 : &opts
->x_flag_sanitize_recover
;
1557 const char *const name
;
1562 { "address", SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
,
1563 sizeof "address" - 1 },
1564 { "kernel-address", SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
,
1565 sizeof "kernel-address" - 1 },
1566 { "thread", SANITIZE_THREAD
, sizeof "thread" - 1 },
1567 { "leak", SANITIZE_LEAK
, sizeof "leak" - 1 },
1568 { "shift", SANITIZE_SHIFT
, sizeof "shift" - 1 },
1569 { "integer-divide-by-zero", SANITIZE_DIVIDE
,
1570 sizeof "integer-divide-by-zero" - 1 },
1571 { "undefined", SANITIZE_UNDEFINED
, sizeof "undefined" - 1 },
1572 { "unreachable", SANITIZE_UNREACHABLE
,
1573 sizeof "unreachable" - 1 },
1574 { "vla-bound", SANITIZE_VLA
, sizeof "vla-bound" - 1 },
1575 { "return", SANITIZE_RETURN
, sizeof "return" - 1 },
1576 { "null", SANITIZE_NULL
, sizeof "null" - 1 },
1577 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW
,
1578 sizeof "signed-integer-overflow" -1 },
1579 { "bool", SANITIZE_BOOL
, sizeof "bool" - 1 },
1580 { "enum", SANITIZE_ENUM
, sizeof "enum" - 1 },
1581 { "float-divide-by-zero", SANITIZE_FLOAT_DIVIDE
,
1582 sizeof "float-divide-by-zero" - 1 },
1583 { "float-cast-overflow", SANITIZE_FLOAT_CAST
,
1584 sizeof "float-cast-overflow" - 1 },
1585 { "bounds", SANITIZE_BOUNDS
, sizeof "bounds" - 1 },
1586 { "alignment", SANITIZE_ALIGNMENT
, sizeof "alignment" - 1 },
1587 { "nonnull-attribute", SANITIZE_NONNULL_ATTRIBUTE
,
1588 sizeof "nonnull-attribute" - 1 },
1589 { "returns-nonnull-attribute",
1590 SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1591 sizeof "returns-nonnull-attribute" - 1 },
1592 { "object-size", SANITIZE_OBJECT_SIZE
,
1593 sizeof "object-size" - 1 },
1600 comma
= strchr (p
, ',');
1611 /* Check to see if the string matches an option class name. */
1612 for (i
= 0; spec
[i
].name
!= NULL
; ++i
)
1613 if (len
== spec
[i
].len
1614 && memcmp (p
, spec
[i
].name
, len
) == 0)
1616 /* Handle both -fsanitize and -fno-sanitize cases. */
1618 *flag
|= spec
[i
].flag
;
1620 *flag
&= ~spec
[i
].flag
;
1627 "unrecognized argument to -fsanitize%s= option: %q.*s",
1628 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1635 if (code
!= OPT_fsanitize_
)
1638 /* Kernel ASan implies normal ASan but does not yet support
1640 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1642 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
, 0,
1643 opts
->x_param_values
,
1644 opts_set
->x_param_values
);
1645 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0,
1646 opts
->x_param_values
,
1647 opts_set
->x_param_values
);
1648 maybe_set_param_value (PARAM_ASAN_STACK
, 0,
1649 opts
->x_param_values
,
1650 opts_set
->x_param_values
);
1651 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1652 opts
->x_param_values
,
1653 opts_set
->x_param_values
);
1659 case OPT_fasan_shadow_offset_
:
1663 case OPT_fsanitize_recover
:
1665 opts
->x_flag_sanitize_recover
1666 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1668 opts
->x_flag_sanitize_recover
1669 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1676 /* Currently handled in a prescan. */
1680 dc
->warning_as_error_requested
= value
;
1684 if (lang_mask
== CL_DRIVER
)
1687 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1688 opts
, opts_set
, loc
, dc
);
1691 case OPT_Wlarger_than_
:
1692 opts
->x_larger_than_size
= value
;
1693 opts
->x_warn_larger_than
= value
!= -1;
1696 case OPT_Wfatal_errors
:
1697 dc
->fatal_errors
= value
;
1700 case OPT_Wframe_larger_than_
:
1701 opts
->x_frame_larger_than_size
= value
;
1702 opts
->x_warn_frame_larger_than
= value
!= -1;
1705 case OPT_Wstack_usage_
:
1706 opts
->x_warn_stack_usage
= value
;
1707 opts
->x_flag_stack_usage_info
= value
!= -1;
1710 case OPT_Wstrict_aliasing
:
1711 set_Wstrict_aliasing (opts
, value
);
1714 case OPT_Wstrict_overflow
:
1715 opts
->x_warn_strict_overflow
= (value
1716 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1720 case OPT_Wsystem_headers
:
1721 dc
->dc_warn_system_headers
= value
;
1725 opts
->x_flag_gen_aux_info
= 1;
1728 case OPT_auxbase_strip
:
1730 char *tmp
= xstrdup (arg
);
1731 strip_off_ending (tmp
, strlen (tmp
));
1733 opts
->x_aux_base_name
= tmp
;
1740 decode_d_option (arg
, opts
, loc
, dc
);
1743 case OPT_fcall_used_
:
1744 case OPT_fcall_saved_
:
1749 case OPT_fdbg_cnt_list
:
1753 case OPT_fdebug_prefix_map_
:
1757 case OPT_fdiagnostics_show_location_
:
1758 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1761 case OPT_fdiagnostics_show_caret
:
1762 dc
->show_caret
= value
;
1765 case OPT_fdiagnostics_color_
:
1766 pp_show_color (dc
->printer
)
1767 = colorize_init ((diagnostic_color_rule_t
) value
);
1770 case OPT_fdiagnostics_show_option
:
1771 dc
->show_option_requested
= value
;
1778 case OPT_ffast_math
:
1779 set_fast_math_flags (opts
, value
);
1782 case OPT_funsafe_math_optimizations
:
1783 set_unsafe_math_optimizations_flags (opts
, value
);
1790 case OPT_finline_limit_
:
1791 set_param_value ("max-inline-insns-single", value
/ 2,
1792 opts
->x_param_values
, opts_set
->x_param_values
);
1793 set_param_value ("max-inline-insns-auto", value
/ 2,
1794 opts
->x_param_values
, opts_set
->x_param_values
);
1797 case OPT_finstrument_functions_exclude_function_list_
:
1798 add_comma_separated_to_vector
1799 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1802 case OPT_finstrument_functions_exclude_file_list_
:
1803 add_comma_separated_to_vector
1804 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1807 case OPT_fmessage_length_
:
1808 pp_set_line_maximum_length (dc
->printer
, value
);
1809 diagnostic_set_caret_max_width (dc
, value
);
1813 case OPT_fopt_info_
:
1821 #ifndef ACCEL_COMPILER
1822 case OPT_foffload_abi_
:
1823 error_at (loc
, "-foffload-abi option can be specified only for "
1824 "offload compiler");
1828 case OPT_fpack_struct_
:
1829 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1831 "structure alignment must be a small power of two, not %d",
1834 opts
->x_initial_max_fld_align
= value
;
1838 case OPT_fplugin_arg_
:
1842 case OPT_fprofile_use_
:
1843 opts
->x_profile_data_prefix
= xstrdup (arg
);
1844 opts
->x_flag_profile_use
= true;
1846 /* No break here - do -fprofile-use processing. */
1847 case OPT_fprofile_use
:
1848 enable_fdo_optimizations (opts
, opts_set
, value
);
1849 if (!opts_set
->x_flag_profile_reorder_functions
)
1850 opts
->x_flag_profile_reorder_functions
= value
;
1851 /* Indirect call profiling should do all useful transformations
1852 speculative devirtualization does. */
1853 if (!opts_set
->x_flag_devirtualize_speculatively
1854 && opts
->x_flag_value_profile_transformations
)
1855 opts
->x_flag_devirtualize_speculatively
= false;
1858 case OPT_fauto_profile_
:
1859 opts
->x_auto_profile_file
= xstrdup (arg
);
1860 opts
->x_flag_auto_profile
= true;
1862 /* No break here - do -fauto-profile processing. */
1863 case OPT_fauto_profile
:
1864 enable_fdo_optimizations (opts
, opts_set
, value
);
1865 if (!opts_set
->x_flag_profile_correction
)
1866 opts
->x_flag_profile_correction
= value
;
1867 maybe_set_param_value (
1868 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1869 opts
->x_param_values
, opts_set
->x_param_values
);
1872 case OPT_fprofile_generate_
:
1873 opts
->x_profile_data_prefix
= xstrdup (arg
);
1875 /* No break here - do -fprofile-generate processing. */
1876 case OPT_fprofile_generate
:
1877 if (!opts_set
->x_profile_arc_flag
)
1878 opts
->x_profile_arc_flag
= value
;
1879 if (!opts_set
->x_flag_profile_values
)
1880 opts
->x_flag_profile_values
= value
;
1881 if (!opts_set
->x_flag_inline_functions
)
1882 opts
->x_flag_inline_functions
= value
;
1883 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1884 quadratic. Disable the pass until better memory representation
1886 if (!opts_set
->x_flag_ipa_reference
)
1887 opts
->x_flag_ipa_reference
= false;
1890 case OPT_ftree_vectorize
:
1891 if (!opts_set
->x_flag_tree_loop_vectorize
)
1892 opts
->x_flag_tree_loop_vectorize
= value
;
1893 if (!opts_set
->x_flag_tree_slp_vectorize
)
1894 opts
->x_flag_tree_slp_vectorize
= value
;
1896 case OPT_fshow_column
:
1897 dc
->show_column
= value
;
1900 case OPT_frandom_seed
:
1901 /* The real switch is -fno-random-seed. */
1907 case OPT_frandom_seed_
:
1911 case OPT_fsched_verbose_
:
1912 #ifdef INSN_SCHEDULING
1913 /* Handled with Var in common.opt. */
1919 case OPT_fsched_stalled_insns_
:
1920 opts
->x_flag_sched_stalled_insns
= value
;
1921 if (opts
->x_flag_sched_stalled_insns
== 0)
1922 opts
->x_flag_sched_stalled_insns
= -1;
1925 case OPT_fsched_stalled_insns_dep_
:
1926 opts
->x_flag_sched_stalled_insns_dep
= value
;
1929 case OPT_fstack_check_
:
1930 if (!strcmp (arg
, "no"))
1931 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1932 else if (!strcmp (arg
, "generic"))
1933 /* This is the old stack checking method. */
1934 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1935 ? FULL_BUILTIN_STACK_CHECK
1936 : GENERIC_STACK_CHECK
;
1937 else if (!strcmp (arg
, "specific"))
1938 /* This is the new stack checking method. */
1939 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1940 ? FULL_BUILTIN_STACK_CHECK
1941 : STACK_CHECK_STATIC_BUILTIN
1942 ? STATIC_BUILTIN_STACK_CHECK
1943 : GENERIC_STACK_CHECK
;
1945 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
1948 case OPT_fstack_limit
:
1949 /* The real switch is -fno-stack-limit. */
1955 case OPT_fstack_limit_register_
:
1956 case OPT_fstack_limit_symbol_
:
1960 case OPT_fstack_usage
:
1961 opts
->x_flag_stack_usage
= value
;
1962 opts
->x_flag_stack_usage_info
= value
!= 0;
1966 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1971 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1975 if (arg
&& strlen (arg
) != 0)
1977 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
1978 "use %<-gdwarf-%s%> for DWARF version "
1979 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
1983 value
= opts
->x_dwarf_version
;
1987 if (value
< 2 || value
> 4)
1988 error_at (loc
, "dwarf version %d is not supported", value
);
1990 opts
->x_dwarf_version
= value
;
1991 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1994 case OPT_gsplit_dwarf
:
1995 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2000 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2005 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2010 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2015 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2021 /* Handled completely via specs. */
2024 case OPT_pedantic_errors
:
2025 dc
->pedantic_errors
= 1;
2026 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
2028 handlers
, opts
, opts_set
,
2033 opts
->x_flag_lto
= value
? "" : NULL
;
2037 dc
->dc_inhibit_warnings
= true;
2040 case OPT_fmax_errors_
:
2041 dc
->max_errors
= value
;
2044 case OPT_fuse_ld_bfd
:
2045 case OPT_fuse_ld_gold
:
2046 case OPT_fuse_linker_plugin
:
2047 /* No-op. Used by the driver and passed to us because it starts with f.*/
2052 opts
->x_flag_trapv
= 0;
2057 opts
->x_flag_wrapv
= 0;
2061 opts
->x_flag_ipa_icf_functions
= value
;
2062 opts
->x_flag_ipa_icf_variables
= value
;
2066 /* If the flag was handled in a standard way, assume the lack of
2067 processing here is intentional. */
2068 gcc_assert (option_flag_var (scode
, opts
));
2072 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2077 /* Handle --param NAME=VALUE. */
2079 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2080 location_t loc
, const char *carg
)
2085 arg
= xstrdup (carg
);
2086 equal
= strchr (arg
, '=');
2088 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2092 value
= integral_argument (equal
+ 1);
2094 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2098 set_param_value (arg
, value
,
2099 opts
->x_param_values
, opts_set
->x_param_values
);
2106 /* Used to set the level of strict aliasing warnings in OPTS,
2107 when no level is specified (i.e., when -Wstrict-aliasing, and not
2108 -Wstrict-aliasing=level was given).
2109 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2110 and 0 otherwise. After calling this function, wstrict_aliasing will be
2111 set to the default value of -Wstrict_aliasing=level, currently 3. */
2113 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2115 gcc_assert (onoff
== 0 || onoff
== 1);
2117 opts
->x_warn_strict_aliasing
= 3;
2119 opts
->x_warn_strict_aliasing
= 0;
2122 /* The following routines are useful in setting all the flags that
2123 -ffast-math and -fno-fast-math imply. */
2125 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2127 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2129 opts
->x_flag_unsafe_math_optimizations
= set
;
2130 set_unsafe_math_optimizations_flags (opts
, set
);
2132 if (!opts
->frontend_set_flag_finite_math_only
)
2133 opts
->x_flag_finite_math_only
= set
;
2134 if (!opts
->frontend_set_flag_errno_math
)
2135 opts
->x_flag_errno_math
= !set
;
2138 if (!opts
->frontend_set_flag_signaling_nans
)
2139 opts
->x_flag_signaling_nans
= 0;
2140 if (!opts
->frontend_set_flag_rounding_math
)
2141 opts
->x_flag_rounding_math
= 0;
2142 if (!opts
->frontend_set_flag_cx_limited_range
)
2143 opts
->x_flag_cx_limited_range
= 1;
2147 /* When -funsafe-math-optimizations is set the following
2148 flags are set as well. */
2150 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2152 if (!opts
->frontend_set_flag_trapping_math
)
2153 opts
->x_flag_trapping_math
= !set
;
2154 if (!opts
->frontend_set_flag_signed_zeros
)
2155 opts
->x_flag_signed_zeros
= !set
;
2156 if (!opts
->frontend_set_flag_associative_math
)
2157 opts
->x_flag_associative_math
= set
;
2158 if (!opts
->frontend_set_flag_reciprocal_math
)
2159 opts
->x_flag_reciprocal_math
= set
;
2162 /* Return true iff flags in OPTS are set as if -ffast-math. */
2164 fast_math_flags_set_p (const struct gcc_options
*opts
)
2166 return (!opts
->x_flag_trapping_math
2167 && opts
->x_flag_unsafe_math_optimizations
2168 && opts
->x_flag_finite_math_only
2169 && !opts
->x_flag_signed_zeros
2170 && !opts
->x_flag_errno_math
);
2173 /* Return true iff flags are set as if -ffast-math but using the flags stored
2174 in the struct cl_optimization structure. */
2176 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2178 return (!opt
->x_flag_trapping_math
2179 && opt
->x_flag_unsafe_math_optimizations
2180 && opt
->x_flag_finite_math_only
2181 && !opt
->x_flag_signed_zeros
2182 && !opt
->x_flag_errno_math
);
2185 /* Handle a debug output -g switch for options OPTS
2186 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2187 explicitly), location LOC. EXTENDED is true or false to support
2188 extended output (2 is special and means "-ggdb" was given). */
2190 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2191 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2194 opts
->x_use_gnu_debug_info_extensions
= extended
;
2196 if (type
== NO_DEBUG
)
2198 if (opts
->x_write_symbols
== NO_DEBUG
)
2200 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2204 #ifdef DWARF2_DEBUGGING_INFO
2205 opts
->x_write_symbols
= DWARF2_DEBUG
;
2206 #elif defined DBX_DEBUGGING_INFO
2207 opts
->x_write_symbols
= DBX_DEBUG
;
2211 if (opts
->x_write_symbols
== NO_DEBUG
)
2212 warning_at (loc
, 0, "target system does not support debug output");
2217 /* Does it conflict with an already selected type? */
2218 if (opts_set
->x_write_symbols
!= NO_DEBUG
2219 && opts
->x_write_symbols
!= NO_DEBUG
2220 && type
!= opts
->x_write_symbols
)
2221 error_at (loc
, "debug format %qs conflicts with prior selection",
2222 debug_type_names
[type
]);
2223 opts
->x_write_symbols
= type
;
2224 opts_set
->x_write_symbols
= type
;
2227 /* A debug flag without a level defaults to level 2.
2228 If off or at level 1, set it to level 2, but if already
2229 at level 3, don't lower it. */
2232 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2233 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2237 int argval
= integral_argument (arg
);
2239 error_at (loc
, "unrecognised debug output level %qs", arg
);
2240 else if (argval
> 3)
2241 error_at (loc
, "debug output level %qs is too high", arg
);
2243 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2247 /* Arrange to dump core on error for diagnostic context DC. (The
2248 regular error message is still printed first, except in the case of
2252 setup_core_dumping (diagnostic_context
*dc
)
2255 signal (SIGABRT
, SIG_DFL
);
2257 #if defined(HAVE_SETRLIMIT)
2260 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2261 fatal_error ("getting core file size maximum limit: %m");
2262 rlim
.rlim_cur
= rlim
.rlim_max
;
2263 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2264 fatal_error ("setting core file size limit to maximum: %m");
2267 diagnostic_abort_on_error (dc
);
2270 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2271 diagnostic context DC. */
2274 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2275 location_t loc
, diagnostic_context
*dc
)
2283 opts
->x_flag_debug_asm
= 1;
2286 opts
->x_flag_print_asm_name
= 1;
2289 opts
->x_flag_dump_rtl_in_asm
= 1;
2290 opts
->x_flag_print_asm_name
= 1;
2293 opts
->x_rtl_dump_and_exit
= 1;
2295 case 'D': /* These are handled by the preprocessor. */
2302 setup_core_dumping (dc
);
2305 opts
->x_flag_dump_all_passed
= true;
2309 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2314 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2315 mask LANG_MASK, option handlers HANDLERS) as an error for option
2316 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2317 NULL), location LOC. This is used by -Werror=. */
2320 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2321 const struct cl_option_handlers
*handlers
,
2322 struct gcc_options
*opts
,
2323 struct gcc_options
*opts_set
,
2324 location_t loc
, diagnostic_context
*dc
)
2329 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2330 new_option
[0] = 'W';
2331 strcpy (new_option
+ 1, arg
);
2332 option_index
= find_opt (new_option
, lang_mask
);
2333 if (option_index
== OPT_SPECIAL_unknown
)
2335 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2339 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2341 control_warning_option (option_index
, (int) kind
, value
,
2343 handlers
, opts
, opts_set
, dc
);
2348 /* Return malloced memory for the name of the option OPTION_INDEX
2349 which enabled a diagnostic (context CONTEXT), originally of type
2350 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2354 option_name (diagnostic_context
*context
, int option_index
,
2355 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2359 /* A warning classified as an error. */
2360 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2361 && diag_kind
== DK_ERROR
)
2362 return concat (cl_options
[OPT_Werror_
].opt_text
,
2363 /* Skip over "-W". */
2364 cl_options
[option_index
].opt_text
+ 2,
2366 /* A warning with option. */
2368 return xstrdup (cl_options
[option_index
].opt_text
);
2370 /* A warning without option classified as an error. */
2371 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2372 || diag_kind
== DK_WARNING
)
2373 && context
->warning_as_error_requested
)
2374 return xstrdup (cl_options
[OPT_Werror
].opt_text
);