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 },
504 /* -O3 optimizations. */
505 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
506 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
507 /* Inlining of functions reducing size is a good idea with -Os
508 regardless of them being declared inline. */
509 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
510 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
511 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
512 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
513 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
514 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
515 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
516 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
517 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
519 /* -Ofast adds optimizations to -O3. */
520 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
522 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
525 /* Default the options in OPTS and OPTS_SET based on the optimization
526 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
528 default_options_optimization (struct gcc_options
*opts
,
529 struct gcc_options
*opts_set
,
530 struct cl_decoded_option
*decoded_options
,
531 unsigned int decoded_options_count
,
533 unsigned int lang_mask
,
534 const struct cl_option_handlers
*handlers
,
535 diagnostic_context
*dc
)
540 /* Scan to see what optimization level has been specified. That will
541 determine the default value of many flags. */
542 for (i
= 1; i
< decoded_options_count
; i
++)
544 struct cl_decoded_option
*opt
= &decoded_options
[i
];
545 switch (opt
->opt_index
)
548 if (*opt
->arg
== '\0')
550 opts
->x_optimize
= 1;
551 opts
->x_optimize_size
= 0;
552 opts
->x_optimize_fast
= 0;
553 opts
->x_optimize_debug
= 0;
557 const int optimize_val
= integral_argument (opt
->arg
);
558 if (optimize_val
== -1)
559 error_at (loc
, "argument to %<-O%> should be a non-negative "
560 "integer, %<g%>, %<s%> or %<fast%>");
563 opts
->x_optimize
= optimize_val
;
564 if ((unsigned int) opts
->x_optimize
> 255)
565 opts
->x_optimize
= 255;
566 opts
->x_optimize_size
= 0;
567 opts
->x_optimize_fast
= 0;
568 opts
->x_optimize_debug
= 0;
574 opts
->x_optimize_size
= 1;
576 /* Optimizing for size forces optimize to be 2. */
577 opts
->x_optimize
= 2;
578 opts
->x_optimize_fast
= 0;
579 opts
->x_optimize_debug
= 0;
583 /* -Ofast only adds flags to -O3. */
584 opts
->x_optimize_size
= 0;
585 opts
->x_optimize
= 3;
586 opts
->x_optimize_fast
= 1;
587 opts
->x_optimize_debug
= 0;
591 /* -Og selects optimization level 1. */
592 opts
->x_optimize_size
= 0;
593 opts
->x_optimize
= 1;
594 opts
->x_optimize_fast
= 0;
595 opts
->x_optimize_debug
= 1;
599 /* Ignore other options in this prescan. */
604 maybe_default_options (opts
, opts_set
, default_options_table
,
605 opts
->x_optimize
, opts
->x_optimize_size
,
606 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
607 lang_mask
, handlers
, loc
, dc
);
609 /* -O2 param settings. */
610 opt2
= (opts
->x_optimize
>= 2);
612 /* Track fields in field-sensitive alias analysis. */
613 maybe_set_param_value
614 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
615 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
616 opts
->x_param_values
, opts_set
->x_param_values
);
618 /* For -O1 only do loop invariant motion for very small loops. */
619 maybe_set_param_value
620 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
621 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
622 opts
->x_param_values
, opts_set
->x_param_values
);
624 /* At -Ofast, allow store motion to introduce potential race conditions. */
625 maybe_set_param_value
626 (PARAM_ALLOW_STORE_DATA_RACES
,
627 opts
->x_optimize_fast
? 1
628 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
629 opts
->x_param_values
, opts_set
->x_param_values
);
631 if (opts
->x_optimize_size
)
632 /* We want to crossjump as much as possible. */
633 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
634 opts
->x_param_values
, opts_set
->x_param_values
);
636 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
637 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
638 opts
->x_param_values
, opts_set
->x_param_values
);
640 /* Restrict the amount of work combine does at -Og while retaining
641 most of its useful transforms. */
642 if (opts
->x_optimize_debug
)
643 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
644 opts
->x_param_values
, opts_set
->x_param_values
);
646 /* Allow default optimizations to be specified on a per-machine basis. */
647 maybe_default_options (opts
, opts_set
,
648 targetm_common
.option_optimization_table
,
649 opts
->x_optimize
, opts
->x_optimize_size
,
650 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
651 lang_mask
, handlers
, loc
, dc
);
654 /* After all options at LOC have been read into OPTS and OPTS_SET,
655 finalize settings of those options and diagnose incompatible
658 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
661 enum unwind_info_type ui_except
;
663 if (opts
->x_dump_base_name
664 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
665 && ! opts
->x_dump_base_name_prefixed
)
667 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
668 OPTS->X_DUMP_DIR_NAME directory. Then try to make
669 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
670 directory, typically the directory to contain the object
672 if (opts
->x_dump_dir_name
)
673 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
674 opts
->x_dump_base_name
, NULL
);
675 else if (opts
->x_aux_base_name
676 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
678 const char *aux_base
;
680 base_of_path (opts
->x_aux_base_name
, &aux_base
);
681 if (opts
->x_aux_base_name
!= aux_base
)
683 int dir_len
= aux_base
- opts
->x_aux_base_name
;
684 char *new_dump_base_name
685 = XOBNEWVEC (&opts_obstack
, char,
686 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
688 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
689 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
690 /* Append existing OPTS->X_DUMP_BASE_NAME. */
691 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
692 opts
->x_dump_base_name
= new_dump_base_name
;
695 opts
->x_dump_base_name_prefixed
= true;
698 /* Handle related options for unit-at-a-time, toplevel-reorder, and
700 if (!opts
->x_flag_unit_at_a_time
)
702 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
703 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
705 opts
->x_flag_section_anchors
= 0;
706 if (opts
->x_flag_toplevel_reorder
== 1)
707 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
709 opts
->x_flag_toplevel_reorder
= 0;
712 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
713 sorry ("transactional memory is not supported with non-call exceptions");
715 /* Unless the user has asked for section anchors, we disable toplevel
716 reordering at -O0 to disable transformations that might be surprising
717 to end users and to get -fno-toplevel-reorder tested. */
718 if (!opts
->x_optimize
719 && opts
->x_flag_toplevel_reorder
== 2
720 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
722 opts
->x_flag_toplevel_reorder
= 0;
723 opts
->x_flag_section_anchors
= 0;
725 if (!opts
->x_flag_toplevel_reorder
)
727 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
728 error_at (loc
, "section anchors must be disabled when toplevel reorder"
730 opts
->x_flag_section_anchors
= 0;
733 if (!opts
->x_flag_opts_finished
)
735 if (opts
->x_flag_pie
)
736 opts
->x_flag_pic
= opts
->x_flag_pie
;
737 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
738 opts
->x_flag_shlib
= 1;
739 opts
->x_flag_opts_finished
= true;
742 if (opts
->x_optimize
== 0)
744 /* Inlining does not work if not optimizing,
745 so force it not to be done. */
746 opts
->x_warn_inline
= 0;
747 opts
->x_flag_no_inline
= 1;
750 /* The optimization to partition hot and cold basic blocks into separate
751 sections of the .o and executable files does not work (currently)
752 with exception handling. This is because there is no support for
753 generating unwind info. If opts->x_flag_exceptions is turned on
754 we need to turn off the partitioning optimization. */
756 ui_except
= targetm_common
.except_unwind_info (opts
);
758 if (opts
->x_flag_exceptions
759 && opts
->x_flag_reorder_blocks_and_partition
760 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
762 if (opts_set
->x_flag_reorder_blocks_and_partition
)
764 "-freorder-blocks-and-partition does not work "
765 "with exceptions on this architecture");
766 opts
->x_flag_reorder_blocks_and_partition
= 0;
767 opts
->x_flag_reorder_blocks
= 1;
770 /* If user requested unwind info, then turn off the partitioning
773 if (opts
->x_flag_unwind_tables
774 && !targetm_common
.unwind_tables_default
775 && opts
->x_flag_reorder_blocks_and_partition
776 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
778 if (opts_set
->x_flag_reorder_blocks_and_partition
)
780 "-freorder-blocks-and-partition does not support "
781 "unwind info on this architecture");
782 opts
->x_flag_reorder_blocks_and_partition
= 0;
783 opts
->x_flag_reorder_blocks
= 1;
786 /* If the target requested unwind info, then turn off the partitioning
787 optimization with a different message. Likewise, if the target does not
788 support named sections. */
790 if (opts
->x_flag_reorder_blocks_and_partition
791 && (!targetm_common
.have_named_sections
792 || (opts
->x_flag_unwind_tables
793 && targetm_common
.unwind_tables_default
794 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
796 if (opts_set
->x_flag_reorder_blocks_and_partition
)
798 "-freorder-blocks-and-partition does not work "
799 "on this architecture");
800 opts
->x_flag_reorder_blocks_and_partition
= 0;
801 opts
->x_flag_reorder_blocks
= 1;
804 if (opts
->x_flag_reorder_blocks_and_partition
805 && !opts_set
->x_flag_reorder_functions
)
806 opts
->x_flag_reorder_functions
= 1;
808 /* Pipelining of outer loops is only possible when general pipelining
809 capabilities are requested. */
810 if (!opts
->x_flag_sel_sched_pipelining
)
811 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
813 if (opts
->x_flag_conserve_stack
)
815 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
816 opts
->x_param_values
, opts_set
->x_param_values
);
817 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
818 opts
->x_param_values
, opts_set
->x_param_values
);
821 if (opts
->x_flag_lto
)
824 opts
->x_flag_generate_lto
= 1;
826 /* When generating IL, do not operate in whole-program mode.
827 Otherwise, symbols will be privatized too early, causing link
829 opts
->x_flag_whole_program
= 0;
831 error_at (loc
, "LTO support has not been enabled in this configuration");
833 if (!opts
->x_flag_fat_lto_objects
835 || (opts_set
->x_flag_use_linker_plugin
836 && !opts
->x_flag_use_linker_plugin
)))
838 if (opts_set
->x_flag_fat_lto_objects
)
839 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
840 opts
->x_flag_fat_lto_objects
= 1;
844 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
845 default value if they choose based on other options. */
846 if (opts
->x_flag_split_stack
== -1)
847 opts
->x_flag_split_stack
= 0;
848 else if (opts
->x_flag_split_stack
)
850 if (!targetm_common
.supports_split_stack (true, opts
))
852 error_at (loc
, "%<-fsplit-stack%> is not supported by "
853 "this compiler configuration");
854 opts
->x_flag_split_stack
= 0;
858 /* Tune vectorization related parametees according to cost model. */
859 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
861 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
862 6, opts
->x_param_values
, opts_set
->x_param_values
);
863 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
864 0, opts
->x_param_values
, opts_set
->x_param_values
);
865 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
866 0, opts
->x_param_values
, opts_set
->x_param_values
);
869 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
871 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
872 || !opts
->x_flag_tree_loop_if_convert
)
873 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
874 opts
->x_param_values
, opts_set
->x_param_values
);
876 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
877 if (opts
->x_dwarf_split_debug_info
)
878 opts
->x_debug_generate_pub_sections
= 2;
880 /* Userspace and kernel ASan conflict with each other and with TSan. */
882 if ((flag_sanitize
& SANITIZE_USER_ADDRESS
)
883 && (flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
885 "-fsanitize=address is incompatible with "
886 "-fsanitize=kernel-address");
888 if ((flag_sanitize
& SANITIZE_ADDRESS
)
889 && (flag_sanitize
& SANITIZE_THREAD
))
891 "-fsanitize=address and -fsanitize=kernel-address "
892 "are incompatible with -fsanitize=thread");
895 #define LEFT_COLUMN 27
897 /* Output ITEM, of length ITEM_WIDTH, in the left column,
898 followed by word-wrapped HELP in a second column. */
900 wrap_help (const char *help
,
902 unsigned int item_width
,
903 unsigned int columns
)
905 unsigned int col_width
= LEFT_COLUMN
;
906 unsigned int remaining
, room
, len
;
908 remaining
= strlen (help
);
912 room
= columns
- 3 - MAX (col_width
, item_width
);
921 for (i
= 0; help
[i
]; i
++)
923 if (i
>= room
&& len
!= remaining
)
927 else if ((help
[i
] == '-' || help
[i
] == '/')
928 && help
[i
+ 1] != ' '
929 && i
> 0 && ISALPHA (help
[i
- 1]))
934 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
936 while (help
[len
] == ' ')
944 /* Print help for a specific front-end, etc. */
946 print_filtered_help (unsigned int include_flags
,
947 unsigned int exclude_flags
,
948 unsigned int any_flags
,
949 unsigned int columns
,
950 struct gcc_options
*opts
,
951 unsigned int lang_mask
)
956 bool displayed
= false;
959 if (include_flags
== CL_PARAMS
)
961 for (i
= 0; i
< LAST_PARAM
; i
++)
963 const char *param
= compiler_params
[i
].option
;
965 help
= compiler_params
[i
].help
;
966 if (help
== NULL
|| *help
== '\0')
968 if (exclude_flags
& CL_UNDOCUMENTED
)
970 help
= undocumented_msg
;
973 /* Get the translation. */
976 if (!opts
->x_quiet_flag
)
978 snprintf (new_help
, sizeof (new_help
),
979 _("default %d minimum %d maximum %d"),
980 compiler_params
[i
].default_value
,
981 compiler_params
[i
].min_value
,
982 compiler_params
[i
].max_value
);
985 wrap_help (help
, param
, strlen (param
), columns
);
991 if (!opts
->x_help_printed
)
992 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
994 if (!opts
->x_help_enum_printed
)
995 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
997 for (i
= 0; i
< cl_options_count
; i
++)
999 const struct cl_option
*option
= cl_options
+ i
;
1004 if (include_flags
== 0
1005 || ((option
->flags
& include_flags
) != include_flags
))
1007 if ((option
->flags
& any_flags
) == 0)
1011 /* Skip unwanted switches. */
1012 if ((option
->flags
& exclude_flags
) != 0)
1015 /* The driver currently prints its own help text. */
1016 if ((option
->flags
& CL_DRIVER
) != 0
1017 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1018 | CL_COMMON
| CL_TARGET
)) == 0)
1022 /* Skip switches that have already been printed. */
1023 if (opts
->x_help_printed
[i
])
1026 opts
->x_help_printed
[i
] = true;
1028 help
= option
->help
;
1031 if (exclude_flags
& CL_UNDOCUMENTED
)
1033 help
= undocumented_msg
;
1036 /* Get the translation. */
1039 /* Find the gap between the name of the
1040 option and its descriptive text. */
1041 tab
= strchr (help
, '\t');
1050 opt
= option
->opt_text
;
1054 /* With the -Q option enabled we change the descriptive text associated
1055 with an option to be an indication of its current setting. */
1056 if (!opts
->x_quiet_flag
)
1058 void *flag_var
= option_flag_var (i
, opts
);
1060 if (len
< (LEFT_COLUMN
+ 2))
1061 strcpy (new_help
, "\t\t");
1063 strcpy (new_help
, "\t");
1065 if (flag_var
!= NULL
1066 && option
->var_type
!= CLVC_DEFER
)
1068 if (option
->flags
& CL_JOINED
)
1070 if (option
->var_type
== CLVC_STRING
)
1072 if (* (const char **) flag_var
!= NULL
)
1073 snprintf (new_help
+ strlen (new_help
),
1074 sizeof (new_help
) - strlen (new_help
),
1075 * (const char **) flag_var
);
1077 else if (option
->var_type
== CLVC_ENUM
)
1079 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1081 const char *arg
= NULL
;
1083 value
= e
->get (flag_var
);
1084 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1086 arg
= _("[default]");
1087 snprintf (new_help
+ strlen (new_help
),
1088 sizeof (new_help
) - strlen (new_help
),
1092 sprintf (new_help
+ strlen (new_help
),
1093 "%#x", * (int *) flag_var
);
1096 strcat (new_help
, option_enabled (i
, opts
)
1097 ? _("[enabled]") : _("[disabled]"));
1103 wrap_help (help
, opt
, len
, columns
);
1106 if (option
->var_type
== CLVC_ENUM
1107 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1108 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1113 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1116 printf (_(" No options with the desired characteristics were found\n"));
1121 /* PR 31349: Tell the user how to see all of the
1122 options supported by a specific front end. */
1123 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1124 if ((1U << i
) & langs
)
1125 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1126 lang_names
[i
], lang_names
[i
]);
1130 else if (! displayed
)
1131 printf (_(" All options with the desired characteristics have already been displayed\n"));
1135 /* Print details of enumerated option arguments, if those
1136 enumerations have help text headings provided. If no help text
1137 is provided, presume that the possible values are listed in the
1138 help text for the relevant options. */
1139 for (i
= 0; i
< cl_enums_count
; i
++)
1141 unsigned int j
, pos
;
1143 if (opts
->x_help_enum_printed
[i
] != 1)
1145 if (cl_enums
[i
].help
== NULL
)
1147 printf (" %s\n ", _(cl_enums
[i
].help
));
1149 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1151 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1153 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1155 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1165 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1170 opts
->x_help_enum_printed
[i
] = 2;
1174 /* Display help for a specified type of option.
1175 The options must have ALL of the INCLUDE_FLAGS set
1176 ANY of the flags in the ANY_FLAGS set
1177 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1178 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1180 print_specific_help (unsigned int include_flags
,
1181 unsigned int exclude_flags
,
1182 unsigned int any_flags
,
1183 struct gcc_options
*opts
,
1184 unsigned int lang_mask
)
1186 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1187 const char * description
= NULL
;
1188 const char * descrip_extra
= "";
1192 /* Sanity check: Make sure that we do not have more
1193 languages than we have bits available to enumerate them. */
1194 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1196 /* If we have not done so already, obtain
1197 the desired maximum width of the output. */
1198 if (opts
->x_help_columns
== 0)
1202 p
= getenv ("COLUMNS");
1205 int value
= atoi (p
);
1208 opts
->x_help_columns
= value
;
1211 if (opts
->x_help_columns
== 0)
1212 /* Use a reasonable default. */
1213 opts
->x_help_columns
= 80;
1216 /* Decide upon the title for the options that we are going to display. */
1217 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1219 switch (flag
& include_flags
)
1226 description
= _("The following options are target specific");
1229 description
= _("The following options control compiler warning messages");
1231 case CL_OPTIMIZATION
:
1232 description
= _("The following options control optimizations");
1235 description
= _("The following options are language-independent");
1238 description
= _("The --param option recognizes the following as parameters");
1241 if (i
>= cl_lang_count
)
1243 if (exclude_flags
& all_langs_mask
)
1244 description
= _("The following options are specific to just the language ");
1246 description
= _("The following options are supported by the language ");
1247 descrip_extra
= lang_names
[i
];
1252 if (description
== NULL
)
1256 if (include_flags
& CL_UNDOCUMENTED
)
1257 description
= _("The following options are not documented");
1258 else if (include_flags
& CL_SEPARATE
)
1259 description
= _("The following options take separate arguments");
1260 else if (include_flags
& CL_JOINED
)
1261 description
= _("The following options take joined arguments");
1264 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1271 if (any_flags
& all_langs_mask
)
1272 description
= _("The following options are language-related");
1274 description
= _("The following options are language-independent");
1278 printf ("%s%s:\n", description
, descrip_extra
);
1279 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1280 opts
->x_help_columns
, opts
, lang_mask
);
1283 /* Enable FDO-related flags. */
1286 enable_fdo_optimizations (struct gcc_options
*opts
,
1287 struct gcc_options
*opts_set
,
1290 if (!opts_set
->x_flag_branch_probabilities
)
1291 opts
->x_flag_branch_probabilities
= value
;
1292 if (!opts_set
->x_flag_profile_values
)
1293 opts
->x_flag_profile_values
= value
;
1294 if (!opts_set
->x_flag_unroll_loops
)
1295 opts
->x_flag_unroll_loops
= value
;
1296 if (!opts_set
->x_flag_peel_loops
)
1297 opts
->x_flag_peel_loops
= value
;
1298 if (!opts_set
->x_flag_tracer
)
1299 opts
->x_flag_tracer
= value
;
1300 if (!opts_set
->x_flag_value_profile_transformations
)
1301 opts
->x_flag_value_profile_transformations
= value
;
1302 if (!opts_set
->x_flag_inline_functions
)
1303 opts
->x_flag_inline_functions
= value
;
1304 if (!opts_set
->x_flag_ipa_cp
)
1305 opts
->x_flag_ipa_cp
= value
;
1306 if (!opts_set
->x_flag_ipa_cp_clone
1307 && value
&& opts
->x_flag_ipa_cp
)
1308 opts
->x_flag_ipa_cp_clone
= value
;
1309 if (!opts_set
->x_flag_predictive_commoning
)
1310 opts
->x_flag_predictive_commoning
= value
;
1311 if (!opts_set
->x_flag_unswitch_loops
)
1312 opts
->x_flag_unswitch_loops
= value
;
1313 if (!opts_set
->x_flag_gcse_after_reload
)
1314 opts
->x_flag_gcse_after_reload
= value
;
1315 if (!opts_set
->x_flag_tree_loop_vectorize
1316 && !opts_set
->x_flag_tree_vectorize
)
1317 opts
->x_flag_tree_loop_vectorize
= value
;
1318 if (!opts_set
->x_flag_tree_slp_vectorize
1319 && !opts_set
->x_flag_tree_vectorize
)
1320 opts
->x_flag_tree_slp_vectorize
= value
;
1321 if (!opts_set
->x_flag_vect_cost_model
)
1322 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1323 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1324 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1327 /* Handle target- and language-independent options. Return zero to
1328 generate an "unknown option" message. Only options that need
1329 extra handling need to be listed here; if you simply want
1330 DECODED->value assigned to a variable, it happens automatically. */
1333 common_handle_option (struct gcc_options
*opts
,
1334 struct gcc_options
*opts_set
,
1335 const struct cl_decoded_option
*decoded
,
1336 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1338 const struct cl_option_handlers
*handlers
,
1339 diagnostic_context
*dc
)
1341 size_t scode
= decoded
->opt_index
;
1342 const char *arg
= decoded
->arg
;
1343 int value
= decoded
->value
;
1344 enum opt_code code
= (enum opt_code
) scode
;
1346 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1351 handle_param (opts
, opts_set
, loc
, arg
);
1356 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1357 unsigned int undoc_mask
;
1360 if (lang_mask
== CL_DRIVER
)
1363 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1366 /* First display any single language specific options. */
1367 for (i
= 0; i
< cl_lang_count
; i
++)
1369 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1371 /* Next display any multi language specific options. */
1372 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1373 /* Then display any remaining, non-language options. */
1374 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1376 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1377 opts
->x_exit_after_options
= true;
1381 case OPT__target_help
:
1382 if (lang_mask
== CL_DRIVER
)
1385 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1386 opts
->x_exit_after_options
= true;
1391 const char * a
= arg
;
1392 unsigned int include_flags
= 0;
1393 /* Note - by default we include undocumented options when listing
1394 specific classes. If you only want to see documented options
1395 then add ",^undocumented" to the --help= option. E.g.:
1397 --help=target,^undocumented */
1398 unsigned int exclude_flags
= 0;
1400 if (lang_mask
== CL_DRIVER
)
1403 /* Walk along the argument string, parsing each word in turn.
1405 arg = [^]{word}[,{arg}]
1406 word = {optimizers|target|warnings|undocumented|
1407 params|common|<language>} */
1412 const char * string
;
1417 { "optimizers", CL_OPTIMIZATION
},
1418 { "target", CL_TARGET
},
1419 { "warnings", CL_WARNING
},
1420 { "undocumented", CL_UNDOCUMENTED
},
1421 { "params", CL_PARAMS
},
1422 { "joined", CL_JOINED
},
1423 { "separate", CL_SEPARATE
},
1424 { "common", CL_COMMON
},
1427 unsigned int * pflags
;
1429 unsigned int lang_flag
, specific_flag
;
1436 pflags
= & exclude_flags
;
1439 pflags
= & include_flags
;
1441 comma
= strchr (a
, ',');
1452 /* Check to see if the string matches an option class name. */
1453 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1454 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1456 specific_flag
= specifics
[i
].flag
;
1460 /* Check to see if the string matches a language name.
1461 Note - we rely upon the alpha-sorted nature of the entries in
1462 the lang_names array, specifically that shorter names appear
1463 before their longer variants. (i.e. C before C++). That way
1464 when we are attempting to match --help=c for example we will
1465 match with C first and not C++. */
1466 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1467 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1469 lang_flag
= 1U << i
;
1473 if (specific_flag
!= 0)
1476 * pflags
|= specific_flag
;
1479 /* The option's argument matches both the start of a
1480 language name and the start of an option class name.
1481 We have a special case for when the user has
1482 specified "--help=c", but otherwise we have to issue
1484 if (strncasecmp (a
, "c", len
) == 0)
1485 * pflags
|= lang_flag
;
1488 "--help argument %q.*s is ambiguous, "
1489 "please be more specific",
1493 else if (lang_flag
!= 0)
1494 * pflags
|= lang_flag
;
1497 "unrecognized argument to --help= option: %q.*s",
1506 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1508 opts
->x_exit_after_options
= true;
1513 if (lang_mask
== CL_DRIVER
)
1516 opts
->x_exit_after_options
= true;
1519 case OPT_fsanitize_
:
1521 const char *p
= arg
;
1526 const char *const name
;
1531 { "address", SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
,
1532 sizeof "address" - 1 },
1533 { "kernel-address", SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
,
1534 sizeof "kernel-address" - 1 },
1535 { "thread", SANITIZE_THREAD
, sizeof "thread" - 1 },
1536 { "leak", SANITIZE_LEAK
, sizeof "leak" - 1 },
1537 { "shift", SANITIZE_SHIFT
, sizeof "shift" - 1 },
1538 { "integer-divide-by-zero", SANITIZE_DIVIDE
,
1539 sizeof "integer-divide-by-zero" - 1 },
1540 { "undefined", SANITIZE_UNDEFINED
, sizeof "undefined" - 1 },
1541 { "unreachable", SANITIZE_UNREACHABLE
,
1542 sizeof "unreachable" - 1 },
1543 { "vla-bound", SANITIZE_VLA
, sizeof "vla-bound" - 1 },
1544 { "return", SANITIZE_RETURN
, sizeof "return" - 1 },
1545 { "null", SANITIZE_NULL
, sizeof "null" - 1 },
1546 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW
,
1547 sizeof "signed-integer-overflow" -1 },
1548 { "bool", SANITIZE_BOOL
, sizeof "bool" - 1 },
1549 { "enum", SANITIZE_ENUM
, sizeof "enum" - 1 },
1550 { "float-divide-by-zero", SANITIZE_FLOAT_DIVIDE
,
1551 sizeof "float-divide-by-zero" - 1 },
1552 { "float-cast-overflow", SANITIZE_FLOAT_CAST
,
1553 sizeof "float-cast-overflow" - 1 },
1554 { "bounds", SANITIZE_BOUNDS
, sizeof "bounds" - 1 },
1555 { "alignment", SANITIZE_ALIGNMENT
, sizeof "alignment" - 1 },
1556 { "nonnull-attribute", SANITIZE_NONNULL_ATTRIBUTE
,
1557 sizeof "nonnull-attribute" - 1 },
1558 { "returns-nonnull-attribute",
1559 SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1560 sizeof "returns-nonnull-attribute" - 1 },
1561 { "object-size", SANITIZE_OBJECT_SIZE
,
1562 sizeof "object-size" - 1 },
1569 comma
= strchr (p
, ',');
1580 /* Check to see if the string matches an option class name. */
1581 for (i
= 0; spec
[i
].name
!= NULL
; ++i
)
1582 if (len
== spec
[i
].len
1583 && memcmp (p
, spec
[i
].name
, len
) == 0)
1585 /* Handle both -fsanitize and -fno-sanitize cases. */
1587 flag_sanitize
|= spec
[i
].flag
;
1589 flag_sanitize
&= ~spec
[i
].flag
;
1596 "unrecognized argument to -fsanitize= option: %q.*s",
1604 /* When instrumenting the pointers, we don't want to remove
1605 the null pointer checks. */
1606 if (flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
1607 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
1608 opts
->x_flag_delete_null_pointer_checks
= 0;
1610 /* Kernel ASan implies normal ASan but does not yet support
1612 if (flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1614 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
, 0,
1615 opts
->x_param_values
,
1616 opts_set
->x_param_values
);
1617 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0,
1618 opts
->x_param_values
,
1619 opts_set
->x_param_values
);
1620 maybe_set_param_value (PARAM_ASAN_STACK
, 0,
1621 opts
->x_param_values
,
1622 opts_set
->x_param_values
);
1623 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1624 opts
->x_param_values
,
1625 opts_set
->x_param_values
);
1635 /* Currently handled in a prescan. */
1639 dc
->warning_as_error_requested
= value
;
1643 if (lang_mask
== CL_DRIVER
)
1646 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1647 opts
, opts_set
, loc
, dc
);
1650 case OPT_Wlarger_than_
:
1651 opts
->x_larger_than_size
= value
;
1652 opts
->x_warn_larger_than
= value
!= -1;
1655 case OPT_Wfatal_errors
:
1656 dc
->fatal_errors
= value
;
1659 case OPT_Wframe_larger_than_
:
1660 opts
->x_frame_larger_than_size
= value
;
1661 opts
->x_warn_frame_larger_than
= value
!= -1;
1664 case OPT_Wstack_usage_
:
1665 opts
->x_warn_stack_usage
= value
;
1666 opts
->x_flag_stack_usage_info
= value
!= -1;
1669 case OPT_Wstrict_aliasing
:
1670 set_Wstrict_aliasing (opts
, value
);
1673 case OPT_Wstrict_overflow
:
1674 opts
->x_warn_strict_overflow
= (value
1675 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1679 case OPT_Wsystem_headers
:
1680 dc
->dc_warn_system_headers
= value
;
1684 opts
->x_flag_gen_aux_info
= 1;
1687 case OPT_auxbase_strip
:
1689 char *tmp
= xstrdup (arg
);
1690 strip_off_ending (tmp
, strlen (tmp
));
1692 opts
->x_aux_base_name
= tmp
;
1699 decode_d_option (arg
, opts
, loc
, dc
);
1702 case OPT_fcall_used_
:
1703 case OPT_fcall_saved_
:
1708 case OPT_fdbg_cnt_list
:
1712 case OPT_fdebug_prefix_map_
:
1716 case OPT_fdiagnostics_show_location_
:
1717 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1720 case OPT_fdiagnostics_show_caret
:
1721 dc
->show_caret
= value
;
1724 case OPT_fdiagnostics_color_
:
1725 pp_show_color (dc
->printer
)
1726 = colorize_init ((diagnostic_color_rule_t
) value
);
1729 case OPT_fdiagnostics_show_option
:
1730 dc
->show_option_requested
= value
;
1737 case OPT_ffast_math
:
1738 set_fast_math_flags (opts
, value
);
1741 case OPT_funsafe_math_optimizations
:
1742 set_unsafe_math_optimizations_flags (opts
, value
);
1749 case OPT_finline_limit_
:
1750 set_param_value ("max-inline-insns-single", value
/ 2,
1751 opts
->x_param_values
, opts_set
->x_param_values
);
1752 set_param_value ("max-inline-insns-auto", value
/ 2,
1753 opts
->x_param_values
, opts_set
->x_param_values
);
1756 case OPT_finstrument_functions_exclude_function_list_
:
1757 add_comma_separated_to_vector
1758 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1761 case OPT_finstrument_functions_exclude_file_list_
:
1762 add_comma_separated_to_vector
1763 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1766 case OPT_fmessage_length_
:
1767 pp_set_line_maximum_length (dc
->printer
, value
);
1768 diagnostic_set_caret_max_width (dc
, value
);
1772 case OPT_fopt_info_
:
1776 case OPT_fpack_struct_
:
1777 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1779 "structure alignment must be a small power of two, not %d",
1782 opts
->x_initial_max_fld_align
= value
;
1786 case OPT_fplugin_arg_
:
1790 case OPT_fprofile_use_
:
1791 opts
->x_profile_data_prefix
= xstrdup (arg
);
1792 opts
->x_flag_profile_use
= true;
1794 /* No break here - do -fprofile-use processing. */
1795 case OPT_fprofile_use
:
1796 enable_fdo_optimizations (opts
, opts_set
, value
);
1797 if (!opts_set
->x_flag_profile_reorder_functions
)
1798 opts
->x_flag_profile_reorder_functions
= value
;
1799 /* Indirect call profiling should do all useful transformations
1800 speculative devirtualization does. */
1801 if (!opts_set
->x_flag_devirtualize_speculatively
1802 && opts
->x_flag_value_profile_transformations
)
1803 opts
->x_flag_devirtualize_speculatively
= false;
1806 case OPT_fauto_profile_
:
1807 opts
->x_auto_profile_file
= xstrdup (arg
);
1808 opts
->x_flag_auto_profile
= true;
1810 /* No break here - do -fauto-profile processing. */
1811 case OPT_fauto_profile
:
1812 enable_fdo_optimizations (opts
, opts_set
, value
);
1813 if (!opts_set
->x_flag_profile_correction
)
1814 opts
->x_flag_profile_correction
= value
;
1815 maybe_set_param_value (
1816 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1817 opts
->x_param_values
, opts_set
->x_param_values
);
1820 case OPT_fprofile_generate_
:
1821 opts
->x_profile_data_prefix
= xstrdup (arg
);
1823 /* No break here - do -fprofile-generate processing. */
1824 case OPT_fprofile_generate
:
1825 if (!opts_set
->x_profile_arc_flag
)
1826 opts
->x_profile_arc_flag
= value
;
1827 if (!opts_set
->x_flag_profile_values
)
1828 opts
->x_flag_profile_values
= value
;
1829 if (!opts_set
->x_flag_inline_functions
)
1830 opts
->x_flag_inline_functions
= value
;
1831 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1832 quadratic. Disable the pass until better memory representation
1834 if (!opts_set
->x_flag_ipa_reference
)
1835 opts
->x_flag_ipa_reference
= false;
1838 case OPT_ftree_vectorize
:
1839 if (!opts_set
->x_flag_tree_loop_vectorize
)
1840 opts
->x_flag_tree_loop_vectorize
= value
;
1841 if (!opts_set
->x_flag_tree_slp_vectorize
)
1842 opts
->x_flag_tree_slp_vectorize
= value
;
1844 case OPT_fshow_column
:
1845 dc
->show_column
= value
;
1848 case OPT_frandom_seed
:
1849 /* The real switch is -fno-random-seed. */
1855 case OPT_frandom_seed_
:
1859 case OPT_fsched_verbose_
:
1860 #ifdef INSN_SCHEDULING
1861 /* Handled with Var in common.opt. */
1867 case OPT_fsched_stalled_insns_
:
1868 opts
->x_flag_sched_stalled_insns
= value
;
1869 if (opts
->x_flag_sched_stalled_insns
== 0)
1870 opts
->x_flag_sched_stalled_insns
= -1;
1873 case OPT_fsched_stalled_insns_dep_
:
1874 opts
->x_flag_sched_stalled_insns_dep
= value
;
1877 case OPT_fstack_check_
:
1878 if (!strcmp (arg
, "no"))
1879 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1880 else if (!strcmp (arg
, "generic"))
1881 /* This is the old stack checking method. */
1882 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1883 ? FULL_BUILTIN_STACK_CHECK
1884 : GENERIC_STACK_CHECK
;
1885 else if (!strcmp (arg
, "specific"))
1886 /* This is the new stack checking method. */
1887 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1888 ? FULL_BUILTIN_STACK_CHECK
1889 : STACK_CHECK_STATIC_BUILTIN
1890 ? STATIC_BUILTIN_STACK_CHECK
1891 : GENERIC_STACK_CHECK
;
1893 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1896 case OPT_fstack_limit
:
1897 /* The real switch is -fno-stack-limit. */
1903 case OPT_fstack_limit_register_
:
1904 case OPT_fstack_limit_symbol_
:
1908 case OPT_fstack_usage
:
1909 opts
->x_flag_stack_usage
= value
;
1910 opts
->x_flag_stack_usage_info
= value
!= 0;
1914 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1919 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1923 if (arg
&& strlen (arg
) != 0)
1925 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
1926 "use %<-gdwarf-%s%> for DWARF version "
1927 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
1931 value
= opts
->x_dwarf_version
;
1935 if (value
< 2 || value
> 4)
1936 error_at (loc
, "dwarf version %d is not supported", value
);
1938 opts
->x_dwarf_version
= value
;
1939 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1942 case OPT_gsplit_dwarf
:
1943 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
1948 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1953 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1958 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1963 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1969 /* Handled completely via specs. */
1972 case OPT_pedantic_errors
:
1973 dc
->pedantic_errors
= 1;
1974 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1976 handlers
, opts
, opts_set
,
1981 opts
->x_flag_lto
= value
? "" : NULL
;
1985 dc
->dc_inhibit_warnings
= true;
1988 case OPT_fmax_errors_
:
1989 dc
->max_errors
= value
;
1992 case OPT_fuse_ld_bfd
:
1993 case OPT_fuse_ld_gold
:
1994 case OPT_fuse_linker_plugin
:
1995 /* No-op. Used by the driver and passed to us because it starts with f.*/
2000 opts
->x_flag_trapv
= 0;
2005 opts
->x_flag_wrapv
= 0;
2009 opts
->x_flag_ipa_icf_functions
= value
;
2010 opts
->x_flag_ipa_icf_variables
= value
;
2014 /* If the flag was handled in a standard way, assume the lack of
2015 processing here is intentional. */
2016 gcc_assert (option_flag_var (scode
, opts
));
2020 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2025 /* Handle --param NAME=VALUE. */
2027 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2028 location_t loc
, const char *carg
)
2033 arg
= xstrdup (carg
);
2034 equal
= strchr (arg
, '=');
2036 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2040 value
= integral_argument (equal
+ 1);
2042 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2046 set_param_value (arg
, value
,
2047 opts
->x_param_values
, opts_set
->x_param_values
);
2054 /* Used to set the level of strict aliasing warnings in OPTS,
2055 when no level is specified (i.e., when -Wstrict-aliasing, and not
2056 -Wstrict-aliasing=level was given).
2057 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2058 and 0 otherwise. After calling this function, wstrict_aliasing will be
2059 set to the default value of -Wstrict_aliasing=level, currently 3. */
2061 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2063 gcc_assert (onoff
== 0 || onoff
== 1);
2065 opts
->x_warn_strict_aliasing
= 3;
2067 opts
->x_warn_strict_aliasing
= 0;
2070 /* The following routines are useful in setting all the flags that
2071 -ffast-math and -fno-fast-math imply. */
2073 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2075 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2077 opts
->x_flag_unsafe_math_optimizations
= set
;
2078 set_unsafe_math_optimizations_flags (opts
, set
);
2080 if (!opts
->frontend_set_flag_finite_math_only
)
2081 opts
->x_flag_finite_math_only
= set
;
2082 if (!opts
->frontend_set_flag_errno_math
)
2083 opts
->x_flag_errno_math
= !set
;
2086 if (!opts
->frontend_set_flag_signaling_nans
)
2087 opts
->x_flag_signaling_nans
= 0;
2088 if (!opts
->frontend_set_flag_rounding_math
)
2089 opts
->x_flag_rounding_math
= 0;
2090 if (!opts
->frontend_set_flag_cx_limited_range
)
2091 opts
->x_flag_cx_limited_range
= 1;
2095 /* When -funsafe-math-optimizations is set the following
2096 flags are set as well. */
2098 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2100 if (!opts
->frontend_set_flag_trapping_math
)
2101 opts
->x_flag_trapping_math
= !set
;
2102 if (!opts
->frontend_set_flag_signed_zeros
)
2103 opts
->x_flag_signed_zeros
= !set
;
2104 if (!opts
->frontend_set_flag_associative_math
)
2105 opts
->x_flag_associative_math
= set
;
2106 if (!opts
->frontend_set_flag_reciprocal_math
)
2107 opts
->x_flag_reciprocal_math
= set
;
2110 /* Return true iff flags in OPTS are set as if -ffast-math. */
2112 fast_math_flags_set_p (const struct gcc_options
*opts
)
2114 return (!opts
->x_flag_trapping_math
2115 && opts
->x_flag_unsafe_math_optimizations
2116 && opts
->x_flag_finite_math_only
2117 && !opts
->x_flag_signed_zeros
2118 && !opts
->x_flag_errno_math
);
2121 /* Return true iff flags are set as if -ffast-math but using the flags stored
2122 in the struct cl_optimization structure. */
2124 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2126 return (!opt
->x_flag_trapping_math
2127 && opt
->x_flag_unsafe_math_optimizations
2128 && opt
->x_flag_finite_math_only
2129 && !opt
->x_flag_signed_zeros
2130 && !opt
->x_flag_errno_math
);
2133 /* Handle a debug output -g switch for options OPTS
2134 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2135 explicitly), location LOC. EXTENDED is true or false to support
2136 extended output (2 is special and means "-ggdb" was given). */
2138 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2139 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2142 opts
->x_use_gnu_debug_info_extensions
= extended
;
2144 if (type
== NO_DEBUG
)
2146 if (opts
->x_write_symbols
== NO_DEBUG
)
2148 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2152 #ifdef DWARF2_DEBUGGING_INFO
2153 opts
->x_write_symbols
= DWARF2_DEBUG
;
2154 #elif defined DBX_DEBUGGING_INFO
2155 opts
->x_write_symbols
= DBX_DEBUG
;
2159 if (opts
->x_write_symbols
== NO_DEBUG
)
2160 warning_at (loc
, 0, "target system does not support debug output");
2165 /* Does it conflict with an already selected type? */
2166 if (opts_set
->x_write_symbols
!= NO_DEBUG
2167 && opts
->x_write_symbols
!= NO_DEBUG
2168 && type
!= opts
->x_write_symbols
)
2169 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
2170 debug_type_names
[type
]);
2171 opts
->x_write_symbols
= type
;
2172 opts_set
->x_write_symbols
= type
;
2175 /* A debug flag without a level defaults to level 2.
2176 If off or at level 1, set it to level 2, but if already
2177 at level 3, don't lower it. */
2180 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2181 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2185 int argval
= integral_argument (arg
);
2187 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
2188 else if (argval
> 3)
2189 error_at (loc
, "debug output level %s is too high", arg
);
2191 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2195 /* Arrange to dump core on error for diagnostic context DC. (The
2196 regular error message is still printed first, except in the case of
2200 setup_core_dumping (diagnostic_context
*dc
)
2203 signal (SIGABRT
, SIG_DFL
);
2205 #if defined(HAVE_SETRLIMIT)
2208 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2209 fatal_error ("getting core file size maximum limit: %m");
2210 rlim
.rlim_cur
= rlim
.rlim_max
;
2211 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2212 fatal_error ("setting core file size limit to maximum: %m");
2215 diagnostic_abort_on_error (dc
);
2218 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2219 diagnostic context DC. */
2222 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2223 location_t loc
, diagnostic_context
*dc
)
2231 opts
->x_flag_debug_asm
= 1;
2234 opts
->x_flag_print_asm_name
= 1;
2237 opts
->x_flag_dump_rtl_in_asm
= 1;
2238 opts
->x_flag_print_asm_name
= 1;
2241 opts
->x_rtl_dump_and_exit
= 1;
2243 case 'D': /* These are handled by the preprocessor. */
2250 setup_core_dumping (dc
);
2253 opts
->x_flag_dump_all_passed
= true;
2257 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2262 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2263 mask LANG_MASK, option handlers HANDLERS) as an error for option
2264 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2265 NULL), location LOC. This is used by -Werror=. */
2268 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2269 const struct cl_option_handlers
*handlers
,
2270 struct gcc_options
*opts
,
2271 struct gcc_options
*opts_set
,
2272 location_t loc
, diagnostic_context
*dc
)
2277 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2278 new_option
[0] = 'W';
2279 strcpy (new_option
+ 1, arg
);
2280 option_index
= find_opt (new_option
, lang_mask
);
2281 if (option_index
== OPT_SPECIAL_unknown
)
2283 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2287 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2289 control_warning_option (option_index
, (int) kind
, value
,
2291 handlers
, opts
, opts_set
, dc
);
2296 /* Return malloced memory for the name of the option OPTION_INDEX
2297 which enabled a diagnostic (context CONTEXT), originally of type
2298 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2302 option_name (diagnostic_context
*context
, int option_index
,
2303 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2307 /* A warning classified as an error. */
2308 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2309 && diag_kind
== DK_ERROR
)
2310 return concat (cl_options
[OPT_Werror_
].opt_text
,
2311 /* Skip over "-W". */
2312 cl_options
[option_index
].opt_text
+ 2,
2314 /* A warning with option. */
2316 return xstrdup (cl_options
[option_index
].opt_text
);
2318 /* A warning without option classified as an error. */
2319 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2320 || diag_kind
== DK_WARNING
)
2321 && context
->warning_as_error_requested
)
2322 return xstrdup (cl_options
[OPT_Werror
].opt_text
);