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");
909 #define LEFT_COLUMN 27
911 /* Output ITEM, of length ITEM_WIDTH, in the left column,
912 followed by word-wrapped HELP in a second column. */
914 wrap_help (const char *help
,
916 unsigned int item_width
,
917 unsigned int columns
)
919 unsigned int col_width
= LEFT_COLUMN
;
920 unsigned int remaining
, room
, len
;
922 remaining
= strlen (help
);
926 room
= columns
- 3 - MAX (col_width
, item_width
);
935 for (i
= 0; help
[i
]; i
++)
937 if (i
>= room
&& len
!= remaining
)
941 else if ((help
[i
] == '-' || help
[i
] == '/')
942 && help
[i
+ 1] != ' '
943 && i
> 0 && ISALPHA (help
[i
- 1]))
948 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
950 while (help
[len
] == ' ')
958 /* Print help for a specific front-end, etc. */
960 print_filtered_help (unsigned int include_flags
,
961 unsigned int exclude_flags
,
962 unsigned int any_flags
,
963 unsigned int columns
,
964 struct gcc_options
*opts
,
965 unsigned int lang_mask
)
970 bool displayed
= false;
973 if (include_flags
== CL_PARAMS
)
975 for (i
= 0; i
< LAST_PARAM
; i
++)
977 const char *param
= compiler_params
[i
].option
;
979 help
= compiler_params
[i
].help
;
980 if (help
== NULL
|| *help
== '\0')
982 if (exclude_flags
& CL_UNDOCUMENTED
)
984 help
= undocumented_msg
;
987 /* Get the translation. */
990 if (!opts
->x_quiet_flag
)
992 snprintf (new_help
, sizeof (new_help
),
993 _("default %d minimum %d maximum %d"),
994 compiler_params
[i
].default_value
,
995 compiler_params
[i
].min_value
,
996 compiler_params
[i
].max_value
);
999 wrap_help (help
, param
, strlen (param
), columns
);
1005 if (!opts
->x_help_printed
)
1006 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1008 if (!opts
->x_help_enum_printed
)
1009 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1011 for (i
= 0; i
< cl_options_count
; i
++)
1013 const struct cl_option
*option
= cl_options
+ i
;
1018 if (include_flags
== 0
1019 || ((option
->flags
& include_flags
) != include_flags
))
1021 if ((option
->flags
& any_flags
) == 0)
1025 /* Skip unwanted switches. */
1026 if ((option
->flags
& exclude_flags
) != 0)
1029 /* The driver currently prints its own help text. */
1030 if ((option
->flags
& CL_DRIVER
) != 0
1031 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1032 | CL_COMMON
| CL_TARGET
)) == 0)
1036 /* Skip switches that have already been printed. */
1037 if (opts
->x_help_printed
[i
])
1040 opts
->x_help_printed
[i
] = true;
1042 help
= option
->help
;
1045 if (exclude_flags
& CL_UNDOCUMENTED
)
1047 help
= undocumented_msg
;
1050 /* Get the translation. */
1053 /* Find the gap between the name of the
1054 option and its descriptive text. */
1055 tab
= strchr (help
, '\t');
1064 opt
= option
->opt_text
;
1068 /* With the -Q option enabled we change the descriptive text associated
1069 with an option to be an indication of its current setting. */
1070 if (!opts
->x_quiet_flag
)
1072 void *flag_var
= option_flag_var (i
, opts
);
1074 if (len
< (LEFT_COLUMN
+ 2))
1075 strcpy (new_help
, "\t\t");
1077 strcpy (new_help
, "\t");
1079 if (flag_var
!= NULL
1080 && option
->var_type
!= CLVC_DEFER
)
1082 if (option
->flags
& CL_JOINED
)
1084 if (option
->var_type
== CLVC_STRING
)
1086 if (* (const char **) flag_var
!= NULL
)
1087 snprintf (new_help
+ strlen (new_help
),
1088 sizeof (new_help
) - strlen (new_help
),
1089 * (const char **) flag_var
);
1091 else if (option
->var_type
== CLVC_ENUM
)
1093 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1095 const char *arg
= NULL
;
1097 value
= e
->get (flag_var
);
1098 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1100 arg
= _("[default]");
1101 snprintf (new_help
+ strlen (new_help
),
1102 sizeof (new_help
) - strlen (new_help
),
1106 sprintf (new_help
+ strlen (new_help
),
1107 "%#x", * (int *) flag_var
);
1110 strcat (new_help
, option_enabled (i
, opts
)
1111 ? _("[enabled]") : _("[disabled]"));
1117 wrap_help (help
, opt
, len
, columns
);
1120 if (option
->var_type
== CLVC_ENUM
1121 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1122 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1127 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1130 printf (_(" No options with the desired characteristics were found\n"));
1135 /* PR 31349: Tell the user how to see all of the
1136 options supported by a specific front end. */
1137 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1138 if ((1U << i
) & langs
)
1139 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1140 lang_names
[i
], lang_names
[i
]);
1144 else if (! displayed
)
1145 printf (_(" All options with the desired characteristics have already been displayed\n"));
1149 /* Print details of enumerated option arguments, if those
1150 enumerations have help text headings provided. If no help text
1151 is provided, presume that the possible values are listed in the
1152 help text for the relevant options. */
1153 for (i
= 0; i
< cl_enums_count
; i
++)
1155 unsigned int j
, pos
;
1157 if (opts
->x_help_enum_printed
[i
] != 1)
1159 if (cl_enums
[i
].help
== NULL
)
1161 printf (" %s\n ", _(cl_enums
[i
].help
));
1163 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1165 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1167 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1169 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1179 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1184 opts
->x_help_enum_printed
[i
] = 2;
1188 /* Display help for a specified type of option.
1189 The options must have ALL of the INCLUDE_FLAGS set
1190 ANY of the flags in the ANY_FLAGS set
1191 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1192 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1194 print_specific_help (unsigned int include_flags
,
1195 unsigned int exclude_flags
,
1196 unsigned int any_flags
,
1197 struct gcc_options
*opts
,
1198 unsigned int lang_mask
)
1200 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1201 const char * description
= NULL
;
1202 const char * descrip_extra
= "";
1206 /* Sanity check: Make sure that we do not have more
1207 languages than we have bits available to enumerate them. */
1208 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1210 /* If we have not done so already, obtain
1211 the desired maximum width of the output. */
1212 if (opts
->x_help_columns
== 0)
1216 p
= getenv ("COLUMNS");
1219 int value
= atoi (p
);
1222 opts
->x_help_columns
= value
;
1225 if (opts
->x_help_columns
== 0)
1226 /* Use a reasonable default. */
1227 opts
->x_help_columns
= 80;
1230 /* Decide upon the title for the options that we are going to display. */
1231 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1233 switch (flag
& include_flags
)
1240 description
= _("The following options are target specific");
1243 description
= _("The following options control compiler warning messages");
1245 case CL_OPTIMIZATION
:
1246 description
= _("The following options control optimizations");
1249 description
= _("The following options are language-independent");
1252 description
= _("The --param option recognizes the following as parameters");
1255 if (i
>= cl_lang_count
)
1257 if (exclude_flags
& all_langs_mask
)
1258 description
= _("The following options are specific to just the language ");
1260 description
= _("The following options are supported by the language ");
1261 descrip_extra
= lang_names
[i
];
1266 if (description
== NULL
)
1270 if (include_flags
& CL_UNDOCUMENTED
)
1271 description
= _("The following options are not documented");
1272 else if (include_flags
& CL_SEPARATE
)
1273 description
= _("The following options take separate arguments");
1274 else if (include_flags
& CL_JOINED
)
1275 description
= _("The following options take joined arguments");
1278 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1285 if (any_flags
& all_langs_mask
)
1286 description
= _("The following options are language-related");
1288 description
= _("The following options are language-independent");
1292 printf ("%s%s:\n", description
, descrip_extra
);
1293 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1294 opts
->x_help_columns
, opts
, lang_mask
);
1297 /* Enable FDO-related flags. */
1300 enable_fdo_optimizations (struct gcc_options
*opts
,
1301 struct gcc_options
*opts_set
,
1304 if (!opts_set
->x_flag_branch_probabilities
)
1305 opts
->x_flag_branch_probabilities
= value
;
1306 if (!opts_set
->x_flag_profile_values
)
1307 opts
->x_flag_profile_values
= value
;
1308 if (!opts_set
->x_flag_unroll_loops
)
1309 opts
->x_flag_unroll_loops
= value
;
1310 if (!opts_set
->x_flag_peel_loops
)
1311 opts
->x_flag_peel_loops
= value
;
1312 if (!opts_set
->x_flag_tracer
)
1313 opts
->x_flag_tracer
= value
;
1314 if (!opts_set
->x_flag_value_profile_transformations
)
1315 opts
->x_flag_value_profile_transformations
= value
;
1316 if (!opts_set
->x_flag_inline_functions
)
1317 opts
->x_flag_inline_functions
= value
;
1318 if (!opts_set
->x_flag_ipa_cp
)
1319 opts
->x_flag_ipa_cp
= value
;
1320 if (!opts_set
->x_flag_ipa_cp_clone
1321 && value
&& opts
->x_flag_ipa_cp
)
1322 opts
->x_flag_ipa_cp_clone
= value
;
1323 if (!opts_set
->x_flag_predictive_commoning
)
1324 opts
->x_flag_predictive_commoning
= value
;
1325 if (!opts_set
->x_flag_unswitch_loops
)
1326 opts
->x_flag_unswitch_loops
= value
;
1327 if (!opts_set
->x_flag_gcse_after_reload
)
1328 opts
->x_flag_gcse_after_reload
= value
;
1329 if (!opts_set
->x_flag_tree_loop_vectorize
1330 && !opts_set
->x_flag_tree_vectorize
)
1331 opts
->x_flag_tree_loop_vectorize
= value
;
1332 if (!opts_set
->x_flag_tree_slp_vectorize
1333 && !opts_set
->x_flag_tree_vectorize
)
1334 opts
->x_flag_tree_slp_vectorize
= value
;
1335 if (!opts_set
->x_flag_vect_cost_model
)
1336 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1337 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1338 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1341 /* Handle target- and language-independent options. Return zero to
1342 generate an "unknown option" message. Only options that need
1343 extra handling need to be listed here; if you simply want
1344 DECODED->value assigned to a variable, it happens automatically. */
1347 common_handle_option (struct gcc_options
*opts
,
1348 struct gcc_options
*opts_set
,
1349 const struct cl_decoded_option
*decoded
,
1350 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1352 const struct cl_option_handlers
*handlers
,
1353 diagnostic_context
*dc
)
1355 size_t scode
= decoded
->opt_index
;
1356 const char *arg
= decoded
->arg
;
1357 int value
= decoded
->value
;
1358 enum opt_code code
= (enum opt_code
) scode
;
1360 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1365 handle_param (opts
, opts_set
, loc
, arg
);
1370 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1371 unsigned int undoc_mask
;
1374 if (lang_mask
== CL_DRIVER
)
1377 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1380 /* First display any single language specific options. */
1381 for (i
= 0; i
< cl_lang_count
; i
++)
1383 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1385 /* Next display any multi language specific options. */
1386 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1387 /* Then display any remaining, non-language options. */
1388 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1390 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1391 opts
->x_exit_after_options
= true;
1395 case OPT__target_help
:
1396 if (lang_mask
== CL_DRIVER
)
1399 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1400 opts
->x_exit_after_options
= true;
1405 const char * a
= arg
;
1406 unsigned int include_flags
= 0;
1407 /* Note - by default we include undocumented options when listing
1408 specific classes. If you only want to see documented options
1409 then add ",^undocumented" to the --help= option. E.g.:
1411 --help=target,^undocumented */
1412 unsigned int exclude_flags
= 0;
1414 if (lang_mask
== CL_DRIVER
)
1417 /* Walk along the argument string, parsing each word in turn.
1419 arg = [^]{word}[,{arg}]
1420 word = {optimizers|target|warnings|undocumented|
1421 params|common|<language>} */
1426 const char * string
;
1431 { "optimizers", CL_OPTIMIZATION
},
1432 { "target", CL_TARGET
},
1433 { "warnings", CL_WARNING
},
1434 { "undocumented", CL_UNDOCUMENTED
},
1435 { "params", CL_PARAMS
},
1436 { "joined", CL_JOINED
},
1437 { "separate", CL_SEPARATE
},
1438 { "common", CL_COMMON
},
1441 unsigned int * pflags
;
1443 unsigned int lang_flag
, specific_flag
;
1450 pflags
= & exclude_flags
;
1453 pflags
= & include_flags
;
1455 comma
= strchr (a
, ',');
1466 /* Check to see if the string matches an option class name. */
1467 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1468 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1470 specific_flag
= specifics
[i
].flag
;
1474 /* Check to see if the string matches a language name.
1475 Note - we rely upon the alpha-sorted nature of the entries in
1476 the lang_names array, specifically that shorter names appear
1477 before their longer variants. (i.e. C before C++). That way
1478 when we are attempting to match --help=c for example we will
1479 match with C first and not C++. */
1480 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1481 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1483 lang_flag
= 1U << i
;
1487 if (specific_flag
!= 0)
1490 * pflags
|= specific_flag
;
1493 /* The option's argument matches both the start of a
1494 language name and the start of an option class name.
1495 We have a special case for when the user has
1496 specified "--help=c", but otherwise we have to issue
1498 if (strncasecmp (a
, "c", len
) == 0)
1499 * pflags
|= lang_flag
;
1502 "--help argument %q.*s is ambiguous, "
1503 "please be more specific",
1507 else if (lang_flag
!= 0)
1508 * pflags
|= lang_flag
;
1511 "unrecognized argument to --help= option: %q.*s",
1520 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1522 opts
->x_exit_after_options
= true;
1527 if (lang_mask
== CL_DRIVER
)
1530 opts
->x_exit_after_options
= true;
1533 case OPT_fsanitize_
:
1534 case OPT_fsanitize_recover_
:
1536 const char *p
= arg
;
1538 = code
== OPT_fsanitize_
? &opts
->x_flag_sanitize
1539 : &opts
->x_flag_sanitize_recover
;
1544 const char *const name
;
1549 { "address", SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
,
1550 sizeof "address" - 1 },
1551 { "kernel-address", SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
,
1552 sizeof "kernel-address" - 1 },
1553 { "thread", SANITIZE_THREAD
, sizeof "thread" - 1 },
1554 { "leak", SANITIZE_LEAK
, sizeof "leak" - 1 },
1555 { "shift", SANITIZE_SHIFT
, sizeof "shift" - 1 },
1556 { "integer-divide-by-zero", SANITIZE_DIVIDE
,
1557 sizeof "integer-divide-by-zero" - 1 },
1558 { "undefined", SANITIZE_UNDEFINED
, sizeof "undefined" - 1 },
1559 { "unreachable", SANITIZE_UNREACHABLE
,
1560 sizeof "unreachable" - 1 },
1561 { "vla-bound", SANITIZE_VLA
, sizeof "vla-bound" - 1 },
1562 { "return", SANITIZE_RETURN
, sizeof "return" - 1 },
1563 { "null", SANITIZE_NULL
, sizeof "null" - 1 },
1564 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW
,
1565 sizeof "signed-integer-overflow" -1 },
1566 { "bool", SANITIZE_BOOL
, sizeof "bool" - 1 },
1567 { "enum", SANITIZE_ENUM
, sizeof "enum" - 1 },
1568 { "float-divide-by-zero", SANITIZE_FLOAT_DIVIDE
,
1569 sizeof "float-divide-by-zero" - 1 },
1570 { "float-cast-overflow", SANITIZE_FLOAT_CAST
,
1571 sizeof "float-cast-overflow" - 1 },
1572 { "bounds", SANITIZE_BOUNDS
, sizeof "bounds" - 1 },
1573 { "alignment", SANITIZE_ALIGNMENT
, sizeof "alignment" - 1 },
1574 { "nonnull-attribute", SANITIZE_NONNULL_ATTRIBUTE
,
1575 sizeof "nonnull-attribute" - 1 },
1576 { "returns-nonnull-attribute",
1577 SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1578 sizeof "returns-nonnull-attribute" - 1 },
1579 { "object-size", SANITIZE_OBJECT_SIZE
,
1580 sizeof "object-size" - 1 },
1587 comma
= strchr (p
, ',');
1598 /* Check to see if the string matches an option class name. */
1599 for (i
= 0; spec
[i
].name
!= NULL
; ++i
)
1600 if (len
== spec
[i
].len
1601 && memcmp (p
, spec
[i
].name
, len
) == 0)
1603 /* Handle both -fsanitize and -fno-sanitize cases. */
1605 *flag
|= spec
[i
].flag
;
1607 *flag
&= ~spec
[i
].flag
;
1614 "unrecognized argument to -fsanitize%s= option: %q.*s",
1615 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1622 if (code
!= OPT_fsanitize_
)
1625 /* When instrumenting the pointers, we don't want to remove
1626 the null pointer checks. */
1627 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
1628 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
1629 opts
->x_flag_delete_null_pointer_checks
= 0;
1631 /* Kernel ASan implies normal ASan but does not yet support
1633 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1635 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
, 0,
1636 opts
->x_param_values
,
1637 opts_set
->x_param_values
);
1638 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0,
1639 opts
->x_param_values
,
1640 opts_set
->x_param_values
);
1641 maybe_set_param_value (PARAM_ASAN_STACK
, 0,
1642 opts
->x_param_values
,
1643 opts_set
->x_param_values
);
1644 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1645 opts
->x_param_values
,
1646 opts_set
->x_param_values
);
1652 case OPT_fasan_shadow_offset_
:
1656 case OPT_fsanitize_recover
:
1658 opts
->x_flag_sanitize_recover
1659 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1661 opts
->x_flag_sanitize_recover
1662 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1669 /* Currently handled in a prescan. */
1673 dc
->warning_as_error_requested
= value
;
1677 if (lang_mask
== CL_DRIVER
)
1680 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1681 opts
, opts_set
, loc
, dc
);
1684 case OPT_Wlarger_than_
:
1685 opts
->x_larger_than_size
= value
;
1686 opts
->x_warn_larger_than
= value
!= -1;
1689 case OPT_Wfatal_errors
:
1690 dc
->fatal_errors
= value
;
1693 case OPT_Wframe_larger_than_
:
1694 opts
->x_frame_larger_than_size
= value
;
1695 opts
->x_warn_frame_larger_than
= value
!= -1;
1698 case OPT_Wstack_usage_
:
1699 opts
->x_warn_stack_usage
= value
;
1700 opts
->x_flag_stack_usage_info
= value
!= -1;
1703 case OPT_Wstrict_aliasing
:
1704 set_Wstrict_aliasing (opts
, value
);
1707 case OPT_Wstrict_overflow
:
1708 opts
->x_warn_strict_overflow
= (value
1709 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1713 case OPT_Wsystem_headers
:
1714 dc
->dc_warn_system_headers
= value
;
1718 opts
->x_flag_gen_aux_info
= 1;
1721 case OPT_auxbase_strip
:
1723 char *tmp
= xstrdup (arg
);
1724 strip_off_ending (tmp
, strlen (tmp
));
1726 opts
->x_aux_base_name
= tmp
;
1733 decode_d_option (arg
, opts
, loc
, dc
);
1736 case OPT_fcall_used_
:
1737 case OPT_fcall_saved_
:
1742 case OPT_fdbg_cnt_list
:
1746 case OPT_fdebug_prefix_map_
:
1750 case OPT_fdiagnostics_show_location_
:
1751 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1754 case OPT_fdiagnostics_show_caret
:
1755 dc
->show_caret
= value
;
1758 case OPT_fdiagnostics_color_
:
1759 pp_show_color (dc
->printer
)
1760 = colorize_init ((diagnostic_color_rule_t
) value
);
1763 case OPT_fdiagnostics_show_option
:
1764 dc
->show_option_requested
= value
;
1771 case OPT_ffast_math
:
1772 set_fast_math_flags (opts
, value
);
1775 case OPT_funsafe_math_optimizations
:
1776 set_unsafe_math_optimizations_flags (opts
, value
);
1783 case OPT_finline_limit_
:
1784 set_param_value ("max-inline-insns-single", value
/ 2,
1785 opts
->x_param_values
, opts_set
->x_param_values
);
1786 set_param_value ("max-inline-insns-auto", value
/ 2,
1787 opts
->x_param_values
, opts_set
->x_param_values
);
1790 case OPT_finstrument_functions_exclude_function_list_
:
1791 add_comma_separated_to_vector
1792 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1795 case OPT_finstrument_functions_exclude_file_list_
:
1796 add_comma_separated_to_vector
1797 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1800 case OPT_fmessage_length_
:
1801 pp_set_line_maximum_length (dc
->printer
, value
);
1802 diagnostic_set_caret_max_width (dc
, value
);
1806 case OPT_fopt_info_
:
1814 #ifndef ACCEL_COMPILER
1815 case OPT_foffload_abi_
:
1816 error_at (loc
, "-foffload-abi option can be specified only for "
1817 "offload compiler");
1821 case OPT_fpack_struct_
:
1822 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1824 "structure alignment must be a small power of two, not %d",
1827 opts
->x_initial_max_fld_align
= value
;
1831 case OPT_fplugin_arg_
:
1835 case OPT_fprofile_use_
:
1836 opts
->x_profile_data_prefix
= xstrdup (arg
);
1837 opts
->x_flag_profile_use
= true;
1839 /* No break here - do -fprofile-use processing. */
1840 case OPT_fprofile_use
:
1841 enable_fdo_optimizations (opts
, opts_set
, value
);
1842 if (!opts_set
->x_flag_profile_reorder_functions
)
1843 opts
->x_flag_profile_reorder_functions
= value
;
1844 /* Indirect call profiling should do all useful transformations
1845 speculative devirtualization does. */
1846 if (!opts_set
->x_flag_devirtualize_speculatively
1847 && opts
->x_flag_value_profile_transformations
)
1848 opts
->x_flag_devirtualize_speculatively
= false;
1851 case OPT_fauto_profile_
:
1852 opts
->x_auto_profile_file
= xstrdup (arg
);
1853 opts
->x_flag_auto_profile
= true;
1855 /* No break here - do -fauto-profile processing. */
1856 case OPT_fauto_profile
:
1857 enable_fdo_optimizations (opts
, opts_set
, value
);
1858 if (!opts_set
->x_flag_profile_correction
)
1859 opts
->x_flag_profile_correction
= value
;
1860 maybe_set_param_value (
1861 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1862 opts
->x_param_values
, opts_set
->x_param_values
);
1865 case OPT_fprofile_generate_
:
1866 opts
->x_profile_data_prefix
= xstrdup (arg
);
1868 /* No break here - do -fprofile-generate processing. */
1869 case OPT_fprofile_generate
:
1870 if (!opts_set
->x_profile_arc_flag
)
1871 opts
->x_profile_arc_flag
= value
;
1872 if (!opts_set
->x_flag_profile_values
)
1873 opts
->x_flag_profile_values
= value
;
1874 if (!opts_set
->x_flag_inline_functions
)
1875 opts
->x_flag_inline_functions
= value
;
1876 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1877 quadratic. Disable the pass until better memory representation
1879 if (!opts_set
->x_flag_ipa_reference
)
1880 opts
->x_flag_ipa_reference
= false;
1883 case OPT_ftree_vectorize
:
1884 if (!opts_set
->x_flag_tree_loop_vectorize
)
1885 opts
->x_flag_tree_loop_vectorize
= value
;
1886 if (!opts_set
->x_flag_tree_slp_vectorize
)
1887 opts
->x_flag_tree_slp_vectorize
= value
;
1889 case OPT_fshow_column
:
1890 dc
->show_column
= value
;
1893 case OPT_frandom_seed
:
1894 /* The real switch is -fno-random-seed. */
1900 case OPT_frandom_seed_
:
1904 case OPT_fsched_verbose_
:
1905 #ifdef INSN_SCHEDULING
1906 /* Handled with Var in common.opt. */
1912 case OPT_fsched_stalled_insns_
:
1913 opts
->x_flag_sched_stalled_insns
= value
;
1914 if (opts
->x_flag_sched_stalled_insns
== 0)
1915 opts
->x_flag_sched_stalled_insns
= -1;
1918 case OPT_fsched_stalled_insns_dep_
:
1919 opts
->x_flag_sched_stalled_insns_dep
= value
;
1922 case OPT_fstack_check_
:
1923 if (!strcmp (arg
, "no"))
1924 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1925 else if (!strcmp (arg
, "generic"))
1926 /* This is the old stack checking method. */
1927 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1928 ? FULL_BUILTIN_STACK_CHECK
1929 : GENERIC_STACK_CHECK
;
1930 else if (!strcmp (arg
, "specific"))
1931 /* This is the new stack checking method. */
1932 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1933 ? FULL_BUILTIN_STACK_CHECK
1934 : STACK_CHECK_STATIC_BUILTIN
1935 ? STATIC_BUILTIN_STACK_CHECK
1936 : GENERIC_STACK_CHECK
;
1938 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
1941 case OPT_fstack_limit
:
1942 /* The real switch is -fno-stack-limit. */
1948 case OPT_fstack_limit_register_
:
1949 case OPT_fstack_limit_symbol_
:
1953 case OPT_fstack_usage
:
1954 opts
->x_flag_stack_usage
= value
;
1955 opts
->x_flag_stack_usage_info
= value
!= 0;
1959 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1964 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1968 if (arg
&& strlen (arg
) != 0)
1970 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
1971 "use %<-gdwarf-%s%> for DWARF version "
1972 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
1976 value
= opts
->x_dwarf_version
;
1980 if (value
< 2 || value
> 4)
1981 error_at (loc
, "dwarf version %d is not supported", value
);
1983 opts
->x_dwarf_version
= value
;
1984 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1987 case OPT_gsplit_dwarf
:
1988 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
1993 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1998 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2003 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2008 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2014 /* Handled completely via specs. */
2017 case OPT_pedantic_errors
:
2018 dc
->pedantic_errors
= 1;
2019 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
2021 handlers
, opts
, opts_set
,
2026 opts
->x_flag_lto
= value
? "" : NULL
;
2030 dc
->dc_inhibit_warnings
= true;
2033 case OPT_fmax_errors_
:
2034 dc
->max_errors
= value
;
2037 case OPT_fuse_ld_bfd
:
2038 case OPT_fuse_ld_gold
:
2039 case OPT_fuse_linker_plugin
:
2040 /* No-op. Used by the driver and passed to us because it starts with f.*/
2045 opts
->x_flag_trapv
= 0;
2050 opts
->x_flag_wrapv
= 0;
2054 opts
->x_flag_ipa_icf_functions
= value
;
2055 opts
->x_flag_ipa_icf_variables
= value
;
2059 /* If the flag was handled in a standard way, assume the lack of
2060 processing here is intentional. */
2061 gcc_assert (option_flag_var (scode
, opts
));
2065 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2070 /* Handle --param NAME=VALUE. */
2072 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2073 location_t loc
, const char *carg
)
2078 arg
= xstrdup (carg
);
2079 equal
= strchr (arg
, '=');
2081 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2085 value
= integral_argument (equal
+ 1);
2087 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2091 set_param_value (arg
, value
,
2092 opts
->x_param_values
, opts_set
->x_param_values
);
2099 /* Used to set the level of strict aliasing warnings in OPTS,
2100 when no level is specified (i.e., when -Wstrict-aliasing, and not
2101 -Wstrict-aliasing=level was given).
2102 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2103 and 0 otherwise. After calling this function, wstrict_aliasing will be
2104 set to the default value of -Wstrict_aliasing=level, currently 3. */
2106 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2108 gcc_assert (onoff
== 0 || onoff
== 1);
2110 opts
->x_warn_strict_aliasing
= 3;
2112 opts
->x_warn_strict_aliasing
= 0;
2115 /* The following routines are useful in setting all the flags that
2116 -ffast-math and -fno-fast-math imply. */
2118 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2120 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2122 opts
->x_flag_unsafe_math_optimizations
= set
;
2123 set_unsafe_math_optimizations_flags (opts
, set
);
2125 if (!opts
->frontend_set_flag_finite_math_only
)
2126 opts
->x_flag_finite_math_only
= set
;
2127 if (!opts
->frontend_set_flag_errno_math
)
2128 opts
->x_flag_errno_math
= !set
;
2131 if (!opts
->frontend_set_flag_signaling_nans
)
2132 opts
->x_flag_signaling_nans
= 0;
2133 if (!opts
->frontend_set_flag_rounding_math
)
2134 opts
->x_flag_rounding_math
= 0;
2135 if (!opts
->frontend_set_flag_cx_limited_range
)
2136 opts
->x_flag_cx_limited_range
= 1;
2140 /* When -funsafe-math-optimizations is set the following
2141 flags are set as well. */
2143 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2145 if (!opts
->frontend_set_flag_trapping_math
)
2146 opts
->x_flag_trapping_math
= !set
;
2147 if (!opts
->frontend_set_flag_signed_zeros
)
2148 opts
->x_flag_signed_zeros
= !set
;
2149 if (!opts
->frontend_set_flag_associative_math
)
2150 opts
->x_flag_associative_math
= set
;
2151 if (!opts
->frontend_set_flag_reciprocal_math
)
2152 opts
->x_flag_reciprocal_math
= set
;
2155 /* Return true iff flags in OPTS are set as if -ffast-math. */
2157 fast_math_flags_set_p (const struct gcc_options
*opts
)
2159 return (!opts
->x_flag_trapping_math
2160 && opts
->x_flag_unsafe_math_optimizations
2161 && opts
->x_flag_finite_math_only
2162 && !opts
->x_flag_signed_zeros
2163 && !opts
->x_flag_errno_math
);
2166 /* Return true iff flags are set as if -ffast-math but using the flags stored
2167 in the struct cl_optimization structure. */
2169 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2171 return (!opt
->x_flag_trapping_math
2172 && opt
->x_flag_unsafe_math_optimizations
2173 && opt
->x_flag_finite_math_only
2174 && !opt
->x_flag_signed_zeros
2175 && !opt
->x_flag_errno_math
);
2178 /* Handle a debug output -g switch for options OPTS
2179 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2180 explicitly), location LOC. EXTENDED is true or false to support
2181 extended output (2 is special and means "-ggdb" was given). */
2183 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2184 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2187 opts
->x_use_gnu_debug_info_extensions
= extended
;
2189 if (type
== NO_DEBUG
)
2191 if (opts
->x_write_symbols
== NO_DEBUG
)
2193 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2197 #ifdef DWARF2_DEBUGGING_INFO
2198 opts
->x_write_symbols
= DWARF2_DEBUG
;
2199 #elif defined DBX_DEBUGGING_INFO
2200 opts
->x_write_symbols
= DBX_DEBUG
;
2204 if (opts
->x_write_symbols
== NO_DEBUG
)
2205 warning_at (loc
, 0, "target system does not support debug output");
2210 /* Does it conflict with an already selected type? */
2211 if (opts_set
->x_write_symbols
!= NO_DEBUG
2212 && opts
->x_write_symbols
!= NO_DEBUG
2213 && type
!= opts
->x_write_symbols
)
2214 error_at (loc
, "debug format %qs conflicts with prior selection",
2215 debug_type_names
[type
]);
2216 opts
->x_write_symbols
= type
;
2217 opts_set
->x_write_symbols
= type
;
2220 /* A debug flag without a level defaults to level 2.
2221 If off or at level 1, set it to level 2, but if already
2222 at level 3, don't lower it. */
2225 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2226 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2230 int argval
= integral_argument (arg
);
2232 error_at (loc
, "unrecognised debug output level %qs", arg
);
2233 else if (argval
> 3)
2234 error_at (loc
, "debug output level %qs is too high", arg
);
2236 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2240 /* Arrange to dump core on error for diagnostic context DC. (The
2241 regular error message is still printed first, except in the case of
2245 setup_core_dumping (diagnostic_context
*dc
)
2248 signal (SIGABRT
, SIG_DFL
);
2250 #if defined(HAVE_SETRLIMIT)
2253 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2254 fatal_error ("getting core file size maximum limit: %m");
2255 rlim
.rlim_cur
= rlim
.rlim_max
;
2256 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2257 fatal_error ("setting core file size limit to maximum: %m");
2260 diagnostic_abort_on_error (dc
);
2263 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2264 diagnostic context DC. */
2267 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2268 location_t loc
, diagnostic_context
*dc
)
2276 opts
->x_flag_debug_asm
= 1;
2279 opts
->x_flag_print_asm_name
= 1;
2282 opts
->x_flag_dump_rtl_in_asm
= 1;
2283 opts
->x_flag_print_asm_name
= 1;
2286 opts
->x_rtl_dump_and_exit
= 1;
2288 case 'D': /* These are handled by the preprocessor. */
2295 setup_core_dumping (dc
);
2298 opts
->x_flag_dump_all_passed
= true;
2302 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2307 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2308 mask LANG_MASK, option handlers HANDLERS) as an error for option
2309 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2310 NULL), location LOC. This is used by -Werror=. */
2313 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2314 const struct cl_option_handlers
*handlers
,
2315 struct gcc_options
*opts
,
2316 struct gcc_options
*opts_set
,
2317 location_t loc
, diagnostic_context
*dc
)
2322 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2323 new_option
[0] = 'W';
2324 strcpy (new_option
+ 1, arg
);
2325 option_index
= find_opt (new_option
, lang_mask
);
2326 if (option_index
== OPT_SPECIAL_unknown
)
2328 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2332 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2334 control_warning_option (option_index
, (int) kind
, value
,
2336 handlers
, opts
, opts_set
, dc
);
2341 /* Return malloced memory for the name of the option OPTION_INDEX
2342 which enabled a diagnostic (context CONTEXT), originally of type
2343 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2347 option_name (diagnostic_context
*context
, int option_index
,
2348 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2352 /* A warning classified as an error. */
2353 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2354 && diag_kind
== DK_ERROR
)
2355 return concat (cl_options
[OPT_Werror_
].opt_text
,
2356 /* Skip over "-W". */
2357 cl_options
[option_index
].opt_text
+ 2,
2359 /* A warning with option. */
2361 return xstrdup (cl_options
[option_index
].opt_text
);
2363 /* A warning without option classified as an error. */
2364 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2365 || diag_kind
== DK_WARNING
)
2366 && context
->warning_as_error_requested
)
2367 return xstrdup (cl_options
[OPT_Werror
].opt_text
);