1 /* Command line option handling.
2 Copyright (C) 2002-2015 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
29 #include "diagnostic.h"
30 #include "opts-diagnostic.h"
31 #include "insn-attr-common.h"
32 #include "common/common-target.h"
34 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
36 /* Indexed by enum debug_info_type. */
37 const char *const debug_type_names
[] =
39 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
42 /* Parse the -femit-struct-debug-detailed option value
43 and set the flag variables. */
45 #define MATCH( prefix, string ) \
46 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
47 ? ((string += sizeof prefix - 1), 1) : 0)
50 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
53 /* various labels for comparison */
54 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
55 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
56 static const char none_lbl
[] = "none", any_lbl
[] = "any";
57 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
59 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
60 /* Default is to apply to as much as possible. */
61 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
65 if (MATCH (dfn_lbl
, spec
))
66 usage
= DINFO_USAGE_DFN
;
67 else if (MATCH (dir_lbl
, spec
))
68 usage
= DINFO_USAGE_DIR_USE
;
69 else if (MATCH (ind_lbl
, spec
))
70 usage
= DINFO_USAGE_IND_USE
;
72 /* Generics or not? */
73 if (MATCH (ord_lbl
, spec
))
75 else if (MATCH (gen_lbl
, spec
))
78 /* What allowable environment? */
79 if (MATCH (none_lbl
, spec
))
80 files
= DINFO_STRUCT_FILE_NONE
;
81 else if (MATCH (any_lbl
, spec
))
82 files
= DINFO_STRUCT_FILE_ANY
;
83 else if (MATCH (sys_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_SYS
;
85 else if (MATCH (base_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_BASE
;
89 "argument %qs to %<-femit-struct-debug-detailed%> "
93 /* Effect the specification. */
94 if (usage
== DINFO_USAGE_NUM_ENUMS
)
98 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
99 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
104 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
105 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
112 opts
->x_debug_struct_ordinary
[usage
] = files
;
114 opts
->x_debug_struct_generic
[usage
] = files
;
118 set_struct_debug_option (opts
, loc
, spec
+1);
121 /* No more -femit-struct-debug-detailed specifications.
125 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
127 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
128 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
129 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
130 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
132 "%<-femit-struct-debug-detailed=dir:...%> must allow "
133 "at least as much as "
134 "%<-femit-struct-debug-detailed=ind:...%>");
138 /* Strip off a legitimate source ending from the input string NAME of
139 length LEN. Rather than having to know the names used by all of
140 our front ends, we strip off an ending of a period followed by
141 up to five characters. (Java uses ".class".) */
144 strip_off_ending (char *name
, int len
)
147 for (i
= 2; i
< 6 && len
> i
; i
++)
149 if (name
[len
- i
] == '.')
151 name
[len
- i
] = '\0';
157 /* Find the base name of a path, stripping off both directories and
158 a single final extension. */
160 base_of_path (const char *path
, const char **base_out
)
162 const char *base
= path
;
164 const char *p
= path
;
168 if (IS_DIR_SEPARATOR (c
))
183 /* What to print when a switch has no documentation. */
184 static const char undocumented_msg
[] = N_("This switch lacks documentation");
186 typedef char *char_p
; /* For DEF_VEC_P. */
188 static void handle_param (struct gcc_options
*opts
,
189 struct gcc_options
*opts_set
, location_t loc
,
191 static void set_debug_level (enum debug_info_type type
, int extended
,
192 const char *arg
, struct gcc_options
*opts
,
193 struct gcc_options
*opts_set
,
195 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
196 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
197 location_t loc
, diagnostic_context
*dc
);
198 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
200 static void enable_warning_as_error (const char *arg
, int value
,
201 unsigned int lang_mask
,
202 const struct cl_option_handlers
*handlers
,
203 struct gcc_options
*opts
,
204 struct gcc_options
*opts_set
,
206 diagnostic_context
*dc
);
208 /* Handle a back-end option; arguments and return value as for
212 target_handle_option (struct gcc_options
*opts
,
213 struct gcc_options
*opts_set
,
214 const struct cl_decoded_option
*decoded
,
215 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
217 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
218 diagnostic_context
*dc
)
220 gcc_assert (dc
== global_dc
);
221 gcc_assert (kind
== DK_UNSPECIFIED
);
222 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
225 /* Add comma-separated strings to a char_p vector. */
228 add_comma_separated_to_vector (void **pvec
, const char *arg
)
234 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
236 vec_check_alloc (v
, 1);
238 /* We never free this string. */
251 v
->safe_push (token_start
);
254 if (*r
== '\\' && r
[1] == ',')
262 if (*token_start
!= '\0')
263 v
->safe_push (token_start
);
268 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
271 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
273 size_t num_params
= get_num_compiler_params ();
275 gcc_obstack_init (&opts_obstack
);
277 *opts
= global_options_init
;
280 memset (opts_set
, 0, sizeof (*opts_set
));
282 opts
->x_param_values
= XNEWVEC (int, num_params
);
285 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
287 init_param_values (opts
->x_param_values
);
289 /* Initialize whether `char' is signed. */
290 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
291 /* Set this to a special "uninitialized" value. The actual default
292 is set after target options have been processed. */
293 opts
->x_flag_short_enums
= 2;
295 /* Initialize target_flags before default_options_optimization
296 so the latter can modify it. */
297 opts
->x_target_flags
= targetm_common
.default_target_flags
;
299 /* Some targets have ABI-specified unwind tables. */
300 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
302 /* Some targets have other target-specific initialization. */
303 targetm_common
.option_init_struct (opts
);
306 /* Release any allocations owned by OPTS. */
309 finalize_options_struct (struct gcc_options
*opts
)
311 XDELETEVEC (opts
->x_param_values
);
314 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
315 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
316 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
317 mask LANG_MASK and option handlers HANDLERS. */
320 maybe_default_option (struct gcc_options
*opts
,
321 struct gcc_options
*opts_set
,
322 const struct default_options
*default_opt
,
323 int level
, bool size
, bool fast
, bool debug
,
324 unsigned int lang_mask
,
325 const struct cl_option_handlers
*handlers
,
327 diagnostic_context
*dc
)
329 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
333 gcc_assert (level
== 2);
335 gcc_assert (level
== 3);
337 gcc_assert (level
== 1);
339 switch (default_opt
->levels
)
345 case OPT_LEVELS_0_ONLY
:
346 enabled
= (level
== 0);
349 case OPT_LEVELS_1_PLUS
:
350 enabled
= (level
>= 1);
353 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
354 enabled
= (level
>= 1 && !size
&& !debug
);
357 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
358 enabled
= (level
>= 1 && !debug
);
361 case OPT_LEVELS_2_PLUS
:
362 enabled
= (level
>= 2);
365 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
366 enabled
= (level
>= 2 && !size
&& !debug
);
369 case OPT_LEVELS_3_PLUS
:
370 enabled
= (level
>= 3);
373 case OPT_LEVELS_3_PLUS_AND_SIZE
:
374 enabled
= (level
>= 3 || size
);
377 case OPT_LEVELS_SIZE
:
381 case OPT_LEVELS_FAST
:
385 case OPT_LEVELS_NONE
:
391 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
392 default_opt
->arg
, default_opt
->value
,
393 lang_mask
, DK_UNSPECIFIED
, loc
,
395 else if (default_opt
->arg
== NULL
396 && !option
->cl_reject_negative
)
397 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
398 default_opt
->arg
, !default_opt
->value
,
399 lang_mask
, DK_UNSPECIFIED
, loc
,
403 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
404 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
405 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
406 language mask LANG_MASK and option handlers HANDLERS. */
409 maybe_default_options (struct gcc_options
*opts
,
410 struct gcc_options
*opts_set
,
411 const struct default_options
*default_opts
,
412 int level
, bool size
, bool fast
, bool debug
,
413 unsigned int lang_mask
,
414 const struct cl_option_handlers
*handlers
,
416 diagnostic_context
*dc
)
420 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
421 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
422 level
, size
, fast
, debug
,
423 lang_mask
, handlers
, loc
, dc
);
426 /* Table of options enabled by default at different levels. */
428 static const struct default_options default_options_table
[] =
430 /* -O1 optimizations. */
431 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fif_conversion2
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_bit_ccp
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_coalesce_vars
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fbranch_count_reg
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fmove_loop_invariants
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_pta
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_fssa_phiopt
, NULL
, 1 },
466 /* -O2 optimizations. */
467 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
479 #ifdef INSN_SCHEDULING
480 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
481 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp_alignment
, NULL
, 1 },
494 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize_speculatively
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
500 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
501 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_CHEAP
},
503 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
504 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
505 { OPT_LEVELS_2_PLUS
, OPT_fipa_icf
, NULL
, 1 },
506 { OPT_LEVELS_2_PLUS
, OPT_fisolate_erroneous_paths_dereference
, NULL
, 1 },
507 { OPT_LEVELS_2_PLUS
, OPT_fipa_ra
, NULL
, 1 },
508 { OPT_LEVELS_2_PLUS
, OPT_flra_remat
, NULL
, 1 },
510 /* -O3 optimizations. */
511 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
512 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
513 /* Inlining of functions reducing size is a good idea with -Os
514 regardless of them being declared inline. */
515 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
516 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
517 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
518 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
519 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_vectorize
, NULL
, 1 },
520 { OPT_LEVELS_3_PLUS
, OPT_ftree_slp_vectorize
, NULL
, 1 },
521 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model_
, NULL
, VECT_COST_MODEL_DYNAMIC
},
522 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
523 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
525 /* -Ofast adds optimizations to -O3. */
526 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
528 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
531 /* Default the options in OPTS and OPTS_SET based on the optimization
532 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
534 default_options_optimization (struct gcc_options
*opts
,
535 struct gcc_options
*opts_set
,
536 struct cl_decoded_option
*decoded_options
,
537 unsigned int decoded_options_count
,
539 unsigned int lang_mask
,
540 const struct cl_option_handlers
*handlers
,
541 diagnostic_context
*dc
)
546 /* Scan to see what optimization level has been specified. That will
547 determine the default value of many flags. */
548 for (i
= 1; i
< decoded_options_count
; i
++)
550 struct cl_decoded_option
*opt
= &decoded_options
[i
];
551 switch (opt
->opt_index
)
554 if (*opt
->arg
== '\0')
556 opts
->x_optimize
= 1;
557 opts
->x_optimize_size
= 0;
558 opts
->x_optimize_fast
= 0;
559 opts
->x_optimize_debug
= 0;
563 const int optimize_val
= integral_argument (opt
->arg
);
564 if (optimize_val
== -1)
565 error_at (loc
, "argument to %<-O%> should be a non-negative "
566 "integer, %<g%>, %<s%> or %<fast%>");
569 opts
->x_optimize
= optimize_val
;
570 if ((unsigned int) opts
->x_optimize
> 255)
571 opts
->x_optimize
= 255;
572 opts
->x_optimize_size
= 0;
573 opts
->x_optimize_fast
= 0;
574 opts
->x_optimize_debug
= 0;
580 opts
->x_optimize_size
= 1;
582 /* Optimizing for size forces optimize to be 2. */
583 opts
->x_optimize
= 2;
584 opts
->x_optimize_fast
= 0;
585 opts
->x_optimize_debug
= 0;
589 /* -Ofast only adds flags to -O3. */
590 opts
->x_optimize_size
= 0;
591 opts
->x_optimize
= 3;
592 opts
->x_optimize_fast
= 1;
593 opts
->x_optimize_debug
= 0;
597 /* -Og selects optimization level 1. */
598 opts
->x_optimize_size
= 0;
599 opts
->x_optimize
= 1;
600 opts
->x_optimize_fast
= 0;
601 opts
->x_optimize_debug
= 1;
605 /* Ignore other options in this prescan. */
610 maybe_default_options (opts
, opts_set
, default_options_table
,
611 opts
->x_optimize
, opts
->x_optimize_size
,
612 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
613 lang_mask
, handlers
, loc
, dc
);
615 /* -O2 param settings. */
616 opt2
= (opts
->x_optimize
>= 2);
618 /* Track fields in field-sensitive alias analysis. */
619 maybe_set_param_value
620 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
621 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
622 opts
->x_param_values
, opts_set
->x_param_values
);
624 /* For -O1 only do loop invariant motion for very small loops. */
625 maybe_set_param_value
626 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
627 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
628 opts
->x_param_values
, opts_set
->x_param_values
);
630 /* At -Ofast, allow store motion to introduce potential race conditions. */
631 maybe_set_param_value
632 (PARAM_ALLOW_STORE_DATA_RACES
,
633 opts
->x_optimize_fast
? 1
634 : default_param_value (PARAM_ALLOW_STORE_DATA_RACES
),
635 opts
->x_param_values
, opts_set
->x_param_values
);
637 if (opts
->x_optimize_size
)
638 /* We want to crossjump as much as possible. */
639 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
640 opts
->x_param_values
, opts_set
->x_param_values
);
642 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
643 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
644 opts
->x_param_values
, opts_set
->x_param_values
);
646 /* Restrict the amount of work combine does at -Og while retaining
647 most of its useful transforms. */
648 if (opts
->x_optimize_debug
)
649 maybe_set_param_value (PARAM_MAX_COMBINE_INSNS
, 2,
650 opts
->x_param_values
, opts_set
->x_param_values
);
652 /* Allow default optimizations to be specified on a per-machine basis. */
653 maybe_default_options (opts
, opts_set
,
654 targetm_common
.option_optimization_table
,
655 opts
->x_optimize
, opts
->x_optimize_size
,
656 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
657 lang_mask
, handlers
, loc
, dc
);
660 /* After all options at LOC have been read into OPTS and OPTS_SET,
661 finalize settings of those options and diagnose incompatible
664 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
667 enum unwind_info_type ui_except
;
669 if (opts
->x_dump_base_name
670 && ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
)
671 && ! opts
->x_dump_base_name_prefixed
)
673 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
674 OPTS->X_DUMP_DIR_NAME directory. Then try to make
675 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
676 directory, typically the directory to contain the object
678 if (opts
->x_dump_dir_name
)
679 opts
->x_dump_base_name
= opts_concat (opts
->x_dump_dir_name
,
680 opts
->x_dump_base_name
, NULL
);
681 else if (opts
->x_aux_base_name
682 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
684 const char *aux_base
;
686 base_of_path (opts
->x_aux_base_name
, &aux_base
);
687 if (opts
->x_aux_base_name
!= aux_base
)
689 int dir_len
= aux_base
- opts
->x_aux_base_name
;
690 char *new_dump_base_name
691 = XOBNEWVEC (&opts_obstack
, char,
692 strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
694 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
695 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
696 /* Append existing OPTS->X_DUMP_BASE_NAME. */
697 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
698 opts
->x_dump_base_name
= new_dump_base_name
;
701 opts
->x_dump_base_name_prefixed
= true;
704 /* Handle related options for unit-at-a-time, toplevel-reorder, and
706 if (!opts
->x_flag_unit_at_a_time
)
708 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
709 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
711 opts
->x_flag_section_anchors
= 0;
712 if (opts
->x_flag_toplevel_reorder
== 1)
713 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
715 opts
->x_flag_toplevel_reorder
= 0;
718 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
719 sorry ("transactional memory is not supported with non-call exceptions");
721 /* Unless the user has asked for section anchors, we disable toplevel
722 reordering at -O0 to disable transformations that might be surprising
723 to end users and to get -fno-toplevel-reorder tested. */
724 if (!opts
->x_optimize
725 && opts
->x_flag_toplevel_reorder
== 2
726 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
728 opts
->x_flag_toplevel_reorder
= 0;
729 opts
->x_flag_section_anchors
= 0;
731 if (!opts
->x_flag_toplevel_reorder
)
733 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
734 error_at (loc
, "section anchors must be disabled when toplevel reorder"
736 opts
->x_flag_section_anchors
= 0;
739 if (!opts
->x_flag_opts_finished
)
741 /* We initialize opts->x_flag_pie to -1 so that targets can set a
743 if (opts
->x_flag_pie
== -1)
745 if (opts
->x_flag_pic
== 0)
746 opts
->x_flag_pie
= DEFAULT_FLAG_PIE
;
748 opts
->x_flag_pie
= 0;
750 if (opts
->x_flag_pie
)
751 opts
->x_flag_pic
= opts
->x_flag_pie
;
752 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
753 opts
->x_flag_shlib
= 1;
754 opts
->x_flag_opts_finished
= true;
757 /* We initialize opts->x_flag_stack_protect to -1 so that targets
758 can set a default value. */
759 if (opts
->x_flag_stack_protect
== -1)
760 opts
->x_flag_stack_protect
= DEFAULT_FLAG_SSP
;
762 if (opts
->x_optimize
== 0)
764 /* Inlining does not work if not optimizing,
765 so force it not to be done. */
766 opts
->x_warn_inline
= 0;
767 opts
->x_flag_no_inline
= 1;
770 /* The optimization to partition hot and cold basic blocks into separate
771 sections of the .o and executable files does not work (currently)
772 with exception handling. This is because there is no support for
773 generating unwind info. If opts->x_flag_exceptions is turned on
774 we need to turn off the partitioning optimization. */
776 ui_except
= targetm_common
.except_unwind_info (opts
);
778 if (opts
->x_flag_exceptions
779 && opts
->x_flag_reorder_blocks_and_partition
780 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
782 if (opts_set
->x_flag_reorder_blocks_and_partition
)
784 "-freorder-blocks-and-partition does not work "
785 "with exceptions on this architecture");
786 opts
->x_flag_reorder_blocks_and_partition
= 0;
787 opts
->x_flag_reorder_blocks
= 1;
790 /* If user requested unwind info, then turn off the partitioning
793 if (opts
->x_flag_unwind_tables
794 && !targetm_common
.unwind_tables_default
795 && opts
->x_flag_reorder_blocks_and_partition
796 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
798 if (opts_set
->x_flag_reorder_blocks_and_partition
)
800 "-freorder-blocks-and-partition does not support "
801 "unwind info on this architecture");
802 opts
->x_flag_reorder_blocks_and_partition
= 0;
803 opts
->x_flag_reorder_blocks
= 1;
806 /* If the target requested unwind info, then turn off the partitioning
807 optimization with a different message. Likewise, if the target does not
808 support named sections. */
810 if (opts
->x_flag_reorder_blocks_and_partition
811 && (!targetm_common
.have_named_sections
812 || (opts
->x_flag_unwind_tables
813 && targetm_common
.unwind_tables_default
814 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
816 if (opts_set
->x_flag_reorder_blocks_and_partition
)
818 "-freorder-blocks-and-partition does not work "
819 "on this architecture");
820 opts
->x_flag_reorder_blocks_and_partition
= 0;
821 opts
->x_flag_reorder_blocks
= 1;
824 if (opts
->x_flag_reorder_blocks_and_partition
825 && !opts_set
->x_flag_reorder_functions
)
826 opts
->x_flag_reorder_functions
= 1;
828 /* Pipelining of outer loops is only possible when general pipelining
829 capabilities are requested. */
830 if (!opts
->x_flag_sel_sched_pipelining
)
831 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
833 if (opts
->x_flag_conserve_stack
)
835 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
836 opts
->x_param_values
, opts_set
->x_param_values
);
837 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
838 opts
->x_param_values
, opts_set
->x_param_values
);
841 if (opts
->x_flag_lto
)
844 opts
->x_flag_generate_lto
= 1;
846 /* When generating IL, do not operate in whole-program mode.
847 Otherwise, symbols will be privatized too early, causing link
849 opts
->x_flag_whole_program
= 0;
851 error_at (loc
, "LTO support has not been enabled in this configuration");
853 if (!opts
->x_flag_fat_lto_objects
855 || (opts_set
->x_flag_use_linker_plugin
856 && !opts
->x_flag_use_linker_plugin
)))
858 if (opts_set
->x_flag_fat_lto_objects
)
859 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin");
860 opts
->x_flag_fat_lto_objects
= 1;
864 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
865 default value if they choose based on other options. */
866 if (opts
->x_flag_split_stack
== -1)
867 opts
->x_flag_split_stack
= 0;
868 else if (opts
->x_flag_split_stack
)
870 if (!targetm_common
.supports_split_stack (true, opts
))
872 error_at (loc
, "%<-fsplit-stack%> is not supported by "
873 "this compiler configuration");
874 opts
->x_flag_split_stack
= 0;
878 /* Tune vectorization related parametees according to cost model. */
879 if (opts
->x_flag_vect_cost_model
== VECT_COST_MODEL_CHEAP
)
881 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS
,
882 6, opts
->x_param_values
, opts_set
->x_param_values
);
883 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS
,
884 0, opts
->x_param_values
, opts_set
->x_param_values
);
885 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT
,
886 0, opts
->x_param_values
, opts_set
->x_param_values
);
889 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
891 if ((!opts
->x_flag_tree_loop_vectorize
&& !opts
->x_flag_tree_slp_vectorize
)
892 || !opts
->x_flag_tree_loop_if_convert
)
893 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
894 opts
->x_param_values
, opts_set
->x_param_values
);
896 /* The -gsplit-dwarf option requires -ggnu-pubnames. */
897 if (opts
->x_dwarf_split_debug_info
)
898 opts
->x_debug_generate_pub_sections
= 2;
900 /* Userspace and kernel ASan conflict with each other. */
902 if ((opts
->x_flag_sanitize
& SANITIZE_USER_ADDRESS
)
903 && (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
))
905 "-fsanitize=address is incompatible with "
906 "-fsanitize=kernel-address");
910 if ((opts
->x_flag_sanitize
& SANITIZE_ADDRESS
)
911 && (opts
->x_flag_sanitize
& SANITIZE_THREAD
))
913 "-fsanitize=address and -fsanitize=kernel-address "
914 "are incompatible with -fsanitize=thread");
916 /* Error recovery is not allowed for ASan and TSan. */
918 if (opts
->x_flag_sanitize_recover
& SANITIZE_USER_ADDRESS
)
919 error_at (loc
, "-fsanitize-recover=address is not supported");
921 if (opts
->x_flag_sanitize_recover
& SANITIZE_THREAD
)
922 error_at (loc
, "-fsanitize-recover=thread is not supported");
924 if (opts
->x_flag_sanitize_recover
& SANITIZE_LEAK
)
925 error_at (loc
, "-fsanitize-recover=leak is not supported");
927 /* When instrumenting the pointers, we don't want to remove
928 the null pointer checks. */
929 if (opts
->x_flag_sanitize
& (SANITIZE_NULL
| SANITIZE_NONNULL_ATTRIBUTE
930 | SANITIZE_RETURNS_NONNULL_ATTRIBUTE
))
931 opts
->x_flag_delete_null_pointer_checks
= 0;
933 /* Aggressive compiler optimizations may cause false negatives. */
934 if (opts
->x_flag_sanitize
)
936 opts
->x_flag_aggressive_loop_optimizations
= 0;
937 opts
->x_flag_strict_overflow
= 0;
941 #define LEFT_COLUMN 27
943 /* Output ITEM, of length ITEM_WIDTH, in the left column,
944 followed by word-wrapped HELP in a second column. */
946 wrap_help (const char *help
,
948 unsigned int item_width
,
949 unsigned int columns
)
951 unsigned int col_width
= LEFT_COLUMN
;
952 unsigned int remaining
, room
, len
;
954 remaining
= strlen (help
);
958 room
= columns
- 3 - MAX (col_width
, item_width
);
967 for (i
= 0; help
[i
]; i
++)
969 if (i
>= room
&& len
!= remaining
)
973 else if ((help
[i
] == '-' || help
[i
] == '/')
974 && help
[i
+ 1] != ' '
975 && i
> 0 && ISALPHA (help
[i
- 1]))
980 printf (" %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
982 while (help
[len
] == ' ')
990 /* Print help for a specific front-end, etc. */
992 print_filtered_help (unsigned int include_flags
,
993 unsigned int exclude_flags
,
994 unsigned int any_flags
,
995 unsigned int columns
,
996 struct gcc_options
*opts
,
997 unsigned int lang_mask
)
1002 bool displayed
= false;
1005 if (include_flags
== CL_PARAMS
)
1007 for (i
= 0; i
< LAST_PARAM
; i
++)
1009 const char *param
= compiler_params
[i
].option
;
1011 help
= compiler_params
[i
].help
;
1012 if (help
== NULL
|| *help
== '\0')
1014 if (exclude_flags
& CL_UNDOCUMENTED
)
1016 help
= undocumented_msg
;
1019 /* Get the translation. */
1022 if (!opts
->x_quiet_flag
)
1024 snprintf (new_help
, sizeof (new_help
),
1025 _("default %d minimum %d maximum %d"),
1026 compiler_params
[i
].default_value
,
1027 compiler_params
[i
].min_value
,
1028 compiler_params
[i
].max_value
);
1031 wrap_help (help
, param
, strlen (param
), columns
);
1037 if (!opts
->x_help_printed
)
1038 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
1040 if (!opts
->x_help_enum_printed
)
1041 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
1043 for (i
= 0; i
< cl_options_count
; i
++)
1045 const struct cl_option
*option
= cl_options
+ i
;
1050 if (include_flags
== 0
1051 || ((option
->flags
& include_flags
) != include_flags
))
1053 if ((option
->flags
& any_flags
) == 0)
1057 /* Skip unwanted switches. */
1058 if ((option
->flags
& exclude_flags
) != 0)
1061 /* The driver currently prints its own help text. */
1062 if ((option
->flags
& CL_DRIVER
) != 0
1063 && (option
->flags
& (((1U << cl_lang_count
) - 1)
1064 | CL_COMMON
| CL_TARGET
)) == 0)
1068 /* Skip switches that have already been printed. */
1069 if (opts
->x_help_printed
[i
])
1072 opts
->x_help_printed
[i
] = true;
1074 help
= option
->help
;
1077 if (exclude_flags
& CL_UNDOCUMENTED
)
1079 help
= undocumented_msg
;
1082 /* Get the translation. */
1085 /* Find the gap between the name of the
1086 option and its descriptive text. */
1087 tab
= strchr (help
, '\t');
1096 opt
= option
->opt_text
;
1100 /* With the -Q option enabled we change the descriptive text associated
1101 with an option to be an indication of its current setting. */
1102 if (!opts
->x_quiet_flag
)
1104 void *flag_var
= option_flag_var (i
, opts
);
1106 if (len
< (LEFT_COLUMN
+ 2))
1107 strcpy (new_help
, "\t\t");
1109 strcpy (new_help
, "\t");
1111 if (flag_var
!= NULL
1112 && option
->var_type
!= CLVC_DEFER
)
1114 if (option
->flags
& CL_JOINED
)
1116 if (option
->var_type
== CLVC_STRING
)
1118 if (* (const char **) flag_var
!= NULL
)
1119 snprintf (new_help
+ strlen (new_help
),
1120 sizeof (new_help
) - strlen (new_help
),
1121 "%s", * (const char **) flag_var
);
1123 else if (option
->var_type
== CLVC_ENUM
)
1125 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1127 const char *arg
= NULL
;
1129 value
= e
->get (flag_var
);
1130 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1132 arg
= _("[default]");
1133 snprintf (new_help
+ strlen (new_help
),
1134 sizeof (new_help
) - strlen (new_help
),
1138 sprintf (new_help
+ strlen (new_help
),
1139 "%#x", * (int *) flag_var
);
1142 strcat (new_help
, option_enabled (i
, opts
)
1143 ? _("[enabled]") : _("[disabled]"));
1149 wrap_help (help
, opt
, len
, columns
);
1152 if (option
->var_type
== CLVC_ENUM
1153 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1154 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1159 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1162 printf (_(" No options with the desired characteristics were found\n"));
1167 /* PR 31349: Tell the user how to see all of the
1168 options supported by a specific front end. */
1169 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1170 if ((1U << i
) & langs
)
1171 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1172 lang_names
[i
], lang_names
[i
]);
1176 else if (! displayed
)
1177 printf (_(" All options with the desired characteristics have already been displayed\n"));
1181 /* Print details of enumerated option arguments, if those
1182 enumerations have help text headings provided. If no help text
1183 is provided, presume that the possible values are listed in the
1184 help text for the relevant options. */
1185 for (i
= 0; i
< cl_enums_count
; i
++)
1187 unsigned int j
, pos
;
1189 if (opts
->x_help_enum_printed
[i
] != 1)
1191 if (cl_enums
[i
].help
== NULL
)
1193 printf (" %s\n ", _(cl_enums
[i
].help
));
1195 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1197 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1199 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1201 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1211 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1216 opts
->x_help_enum_printed
[i
] = 2;
1220 /* Display help for a specified type of option.
1221 The options must have ALL of the INCLUDE_FLAGS set
1222 ANY of the flags in the ANY_FLAGS set
1223 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1224 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1226 print_specific_help (unsigned int include_flags
,
1227 unsigned int exclude_flags
,
1228 unsigned int any_flags
,
1229 struct gcc_options
*opts
,
1230 unsigned int lang_mask
)
1232 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1233 const char * description
= NULL
;
1234 const char * descrip_extra
= "";
1238 /* Sanity check: Make sure that we do not have more
1239 languages than we have bits available to enumerate them. */
1240 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1242 /* If we have not done so already, obtain
1243 the desired maximum width of the output. */
1244 if (opts
->x_help_columns
== 0)
1246 opts
->x_help_columns
= get_terminal_width ();
1247 if (opts
->x_help_columns
== INT_MAX
)
1248 /* Use a reasonable default. */
1249 opts
->x_help_columns
= 80;
1252 /* Decide upon the title for the options that we are going to display. */
1253 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1255 switch (flag
& include_flags
)
1262 description
= _("The following options are target specific");
1265 description
= _("The following options control compiler warning messages");
1267 case CL_OPTIMIZATION
:
1268 description
= _("The following options control optimizations");
1271 description
= _("The following options are language-independent");
1274 description
= _("The --param option recognizes the following as parameters");
1277 if (i
>= cl_lang_count
)
1279 if (exclude_flags
& all_langs_mask
)
1280 description
= _("The following options are specific to just the language ");
1282 description
= _("The following options are supported by the language ");
1283 descrip_extra
= lang_names
[i
];
1288 if (description
== NULL
)
1292 if (include_flags
& CL_UNDOCUMENTED
)
1293 description
= _("The following options are not documented");
1294 else if (include_flags
& CL_SEPARATE
)
1295 description
= _("The following options take separate arguments");
1296 else if (include_flags
& CL_JOINED
)
1297 description
= _("The following options take joined arguments");
1300 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1307 if (any_flags
& all_langs_mask
)
1308 description
= _("The following options are language-related");
1310 description
= _("The following options are language-independent");
1314 printf ("%s%s:\n", description
, descrip_extra
);
1315 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1316 opts
->x_help_columns
, opts
, lang_mask
);
1319 /* Enable FDO-related flags. */
1322 enable_fdo_optimizations (struct gcc_options
*opts
,
1323 struct gcc_options
*opts_set
,
1326 if (!opts_set
->x_flag_branch_probabilities
)
1327 opts
->x_flag_branch_probabilities
= value
;
1328 if (!opts_set
->x_flag_profile_values
)
1329 opts
->x_flag_profile_values
= value
;
1330 if (!opts_set
->x_flag_unroll_loops
)
1331 opts
->x_flag_unroll_loops
= value
;
1332 if (!opts_set
->x_flag_peel_loops
)
1333 opts
->x_flag_peel_loops
= value
;
1334 if (!opts_set
->x_flag_tracer
)
1335 opts
->x_flag_tracer
= value
;
1336 if (!opts_set
->x_flag_value_profile_transformations
)
1337 opts
->x_flag_value_profile_transformations
= value
;
1338 if (!opts_set
->x_flag_inline_functions
)
1339 opts
->x_flag_inline_functions
= value
;
1340 if (!opts_set
->x_flag_ipa_cp
)
1341 opts
->x_flag_ipa_cp
= value
;
1342 if (!opts_set
->x_flag_ipa_cp_clone
1343 && value
&& opts
->x_flag_ipa_cp
)
1344 opts
->x_flag_ipa_cp_clone
= value
;
1345 if (!opts_set
->x_flag_ipa_cp_alignment
1346 && value
&& opts
->x_flag_ipa_cp
)
1347 opts
->x_flag_ipa_cp_alignment
= value
;
1348 if (!opts_set
->x_flag_predictive_commoning
)
1349 opts
->x_flag_predictive_commoning
= value
;
1350 if (!opts_set
->x_flag_unswitch_loops
)
1351 opts
->x_flag_unswitch_loops
= value
;
1352 if (!opts_set
->x_flag_gcse_after_reload
)
1353 opts
->x_flag_gcse_after_reload
= value
;
1354 if (!opts_set
->x_flag_tree_loop_vectorize
1355 && !opts_set
->x_flag_tree_vectorize
)
1356 opts
->x_flag_tree_loop_vectorize
= value
;
1357 if (!opts_set
->x_flag_tree_slp_vectorize
1358 && !opts_set
->x_flag_tree_vectorize
)
1359 opts
->x_flag_tree_slp_vectorize
= value
;
1360 if (!opts_set
->x_flag_vect_cost_model
)
1361 opts
->x_flag_vect_cost_model
= VECT_COST_MODEL_DYNAMIC
;
1362 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1363 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1366 /* Handle target- and language-independent options. Return zero to
1367 generate an "unknown option" message. Only options that need
1368 extra handling need to be listed here; if you simply want
1369 DECODED->value assigned to a variable, it happens automatically. */
1372 common_handle_option (struct gcc_options
*opts
,
1373 struct gcc_options
*opts_set
,
1374 const struct cl_decoded_option
*decoded
,
1375 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1377 const struct cl_option_handlers
*handlers
,
1378 diagnostic_context
*dc
)
1380 size_t scode
= decoded
->opt_index
;
1381 const char *arg
= decoded
->arg
;
1382 int value
= decoded
->value
;
1383 enum opt_code code
= (enum opt_code
) scode
;
1385 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1390 handle_param (opts
, opts_set
, loc
, arg
);
1395 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1396 unsigned int undoc_mask
;
1399 if (lang_mask
== CL_DRIVER
)
1402 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1405 /* First display any single language specific options. */
1406 for (i
= 0; i
< cl_lang_count
; i
++)
1408 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1410 /* Next display any multi language specific options. */
1411 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1412 /* Then display any remaining, non-language options. */
1413 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1415 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1416 opts
->x_exit_after_options
= true;
1420 case OPT__target_help
:
1421 if (lang_mask
== CL_DRIVER
)
1424 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1425 opts
->x_exit_after_options
= true;
1430 const char * a
= arg
;
1431 unsigned int include_flags
= 0;
1432 /* Note - by default we include undocumented options when listing
1433 specific classes. If you only want to see documented options
1434 then add ",^undocumented" to the --help= option. E.g.:
1436 --help=target,^undocumented */
1437 unsigned int exclude_flags
= 0;
1439 if (lang_mask
== CL_DRIVER
)
1442 /* Walk along the argument string, parsing each word in turn.
1444 arg = [^]{word}[,{arg}]
1445 word = {optimizers|target|warnings|undocumented|
1446 params|common|<language>} */
1451 const char * string
;
1456 { "optimizers", CL_OPTIMIZATION
},
1457 { "target", CL_TARGET
},
1458 { "warnings", CL_WARNING
},
1459 { "undocumented", CL_UNDOCUMENTED
},
1460 { "params", CL_PARAMS
},
1461 { "joined", CL_JOINED
},
1462 { "separate", CL_SEPARATE
},
1463 { "common", CL_COMMON
},
1466 unsigned int * pflags
;
1468 unsigned int lang_flag
, specific_flag
;
1475 pflags
= & exclude_flags
;
1478 pflags
= & include_flags
;
1480 comma
= strchr (a
, ',');
1491 /* Check to see if the string matches an option class name. */
1492 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1493 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1495 specific_flag
= specifics
[i
].flag
;
1499 /* Check to see if the string matches a language name.
1500 Note - we rely upon the alpha-sorted nature of the entries in
1501 the lang_names array, specifically that shorter names appear
1502 before their longer variants. (i.e. C before C++). That way
1503 when we are attempting to match --help=c for example we will
1504 match with C first and not C++. */
1505 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1506 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1508 lang_flag
= 1U << i
;
1512 if (specific_flag
!= 0)
1515 * pflags
|= specific_flag
;
1518 /* The option's argument matches both the start of a
1519 language name and the start of an option class name.
1520 We have a special case for when the user has
1521 specified "--help=c", but otherwise we have to issue
1523 if (strncasecmp (a
, "c", len
) == 0)
1524 * pflags
|= lang_flag
;
1527 "--help argument %q.*s is ambiguous, "
1528 "please be more specific",
1532 else if (lang_flag
!= 0)
1533 * pflags
|= lang_flag
;
1536 "unrecognized argument to --help= option: %q.*s",
1545 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1547 opts
->x_exit_after_options
= true;
1552 if (lang_mask
== CL_DRIVER
)
1555 opts
->x_exit_after_options
= true;
1558 case OPT_fsanitize_
:
1559 case OPT_fsanitize_recover_
:
1561 const char *p
= arg
;
1563 = code
== OPT_fsanitize_
? &opts
->x_flag_sanitize
1564 : &opts
->x_flag_sanitize_recover
;
1569 const char *const name
;
1574 { "address", SANITIZE_ADDRESS
| SANITIZE_USER_ADDRESS
,
1575 sizeof "address" - 1 },
1576 { "kernel-address", SANITIZE_ADDRESS
| SANITIZE_KERNEL_ADDRESS
,
1577 sizeof "kernel-address" - 1 },
1578 { "thread", SANITIZE_THREAD
, sizeof "thread" - 1 },
1579 { "leak", SANITIZE_LEAK
, sizeof "leak" - 1 },
1580 { "shift", SANITIZE_SHIFT
, sizeof "shift" - 1 },
1581 { "integer-divide-by-zero", SANITIZE_DIVIDE
,
1582 sizeof "integer-divide-by-zero" - 1 },
1583 { "undefined", SANITIZE_UNDEFINED
, sizeof "undefined" - 1 },
1584 { "unreachable", SANITIZE_UNREACHABLE
,
1585 sizeof "unreachable" - 1 },
1586 { "vla-bound", SANITIZE_VLA
, sizeof "vla-bound" - 1 },
1587 { "return", SANITIZE_RETURN
, sizeof "return" - 1 },
1588 { "null", SANITIZE_NULL
, sizeof "null" - 1 },
1589 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW
,
1590 sizeof "signed-integer-overflow" -1 },
1591 { "bool", SANITIZE_BOOL
, sizeof "bool" - 1 },
1592 { "enum", SANITIZE_ENUM
, sizeof "enum" - 1 },
1593 { "float-divide-by-zero", SANITIZE_FLOAT_DIVIDE
,
1594 sizeof "float-divide-by-zero" - 1 },
1595 { "float-cast-overflow", SANITIZE_FLOAT_CAST
,
1596 sizeof "float-cast-overflow" - 1 },
1597 { "bounds", SANITIZE_BOUNDS
, sizeof "bounds" - 1 },
1598 { "bounds-strict", SANITIZE_BOUNDS
| SANITIZE_BOUNDS_STRICT
,
1599 sizeof "bounds-strict" - 1 },
1600 { "alignment", SANITIZE_ALIGNMENT
, sizeof "alignment" - 1 },
1601 { "nonnull-attribute", SANITIZE_NONNULL_ATTRIBUTE
,
1602 sizeof "nonnull-attribute" - 1 },
1603 { "returns-nonnull-attribute",
1604 SANITIZE_RETURNS_NONNULL_ATTRIBUTE
,
1605 sizeof "returns-nonnull-attribute" - 1 },
1606 { "object-size", SANITIZE_OBJECT_SIZE
,
1607 sizeof "object-size" - 1 },
1608 { "vptr", SANITIZE_VPTR
, sizeof "vptr" - 1 },
1609 { "all", ~0, sizeof "all" - 1 },
1616 comma
= strchr (p
, ',');
1627 /* Check to see if the string matches an option class name. */
1628 for (i
= 0; spec
[i
].name
!= NULL
; ++i
)
1629 if (len
== spec
[i
].len
1630 && memcmp (p
, spec
[i
].name
, len
) == 0)
1632 /* Handle both -fsanitize and -fno-sanitize cases. */
1633 if (value
&& spec
[i
].flag
== ~0U)
1635 if (code
== OPT_fsanitize_
)
1636 error_at (loc
, "-fsanitize=all option is not valid");
1638 *flag
|= ~(SANITIZE_USER_ADDRESS
| SANITIZE_THREAD
1642 *flag
|= spec
[i
].flag
;
1644 *flag
&= ~spec
[i
].flag
;
1651 "unrecognized argument to -fsanitize%s= option: %q.*s",
1652 code
== OPT_fsanitize_
? "" : "-recover", (int) len
, p
);
1659 if (code
!= OPT_fsanitize_
)
1662 /* Kernel ASan implies normal ASan but does not yet support
1664 if (opts
->x_flag_sanitize
& SANITIZE_KERNEL_ADDRESS
)
1666 maybe_set_param_value (PARAM_ASAN_INSTRUMENTATION_WITH_CALL_THRESHOLD
, 0,
1667 opts
->x_param_values
,
1668 opts_set
->x_param_values
);
1669 maybe_set_param_value (PARAM_ASAN_GLOBALS
, 0,
1670 opts
->x_param_values
,
1671 opts_set
->x_param_values
);
1672 maybe_set_param_value (PARAM_ASAN_STACK
, 0,
1673 opts
->x_param_values
,
1674 opts_set
->x_param_values
);
1675 maybe_set_param_value (PARAM_ASAN_USE_AFTER_RETURN
, 0,
1676 opts
->x_param_values
,
1677 opts_set
->x_param_values
);
1683 case OPT_fasan_shadow_offset_
:
1687 case OPT_fsanitize_recover
:
1689 opts
->x_flag_sanitize_recover
1690 |= SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
;
1692 opts
->x_flag_sanitize_recover
1693 &= ~(SANITIZE_UNDEFINED
| SANITIZE_NONDEFAULT
);
1700 /* Currently handled in a prescan. */
1704 dc
->warning_as_error_requested
= value
;
1708 if (lang_mask
== CL_DRIVER
)
1711 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1712 opts
, opts_set
, loc
, dc
);
1715 case OPT_Wlarger_than_
:
1716 opts
->x_larger_than_size
= value
;
1717 opts
->x_warn_larger_than
= value
!= -1;
1720 case OPT_Wfatal_errors
:
1721 dc
->fatal_errors
= value
;
1724 case OPT_Wframe_larger_than_
:
1725 opts
->x_frame_larger_than_size
= value
;
1726 opts
->x_warn_frame_larger_than
= value
!= -1;
1729 case OPT_Wstack_usage_
:
1730 opts
->x_warn_stack_usage
= value
;
1731 opts
->x_flag_stack_usage_info
= value
!= -1;
1734 case OPT_Wstrict_aliasing
:
1735 set_Wstrict_aliasing (opts
, value
);
1738 case OPT_Wstrict_overflow
:
1739 opts
->x_warn_strict_overflow
= (value
1740 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1744 case OPT_Wsystem_headers
:
1745 dc
->dc_warn_system_headers
= value
;
1749 opts
->x_flag_gen_aux_info
= 1;
1752 case OPT_auxbase_strip
:
1754 char *tmp
= xstrdup (arg
);
1755 strip_off_ending (tmp
, strlen (tmp
));
1757 opts
->x_aux_base_name
= tmp
;
1764 decode_d_option (arg
, opts
, loc
, dc
);
1767 case OPT_fcall_used_
:
1768 case OPT_fcall_saved_
:
1776 case OPT_fdbg_cnt_list
:
1778 opts
->x_exit_after_options
= true;
1781 case OPT_fdebug_prefix_map_
:
1785 case OPT_fdiagnostics_show_location_
:
1786 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1789 case OPT_fdiagnostics_show_caret
:
1790 dc
->show_caret
= value
;
1793 case OPT_fdiagnostics_color_
:
1794 diagnostic_color_init (dc
, value
);
1797 case OPT_fdiagnostics_show_option
:
1798 dc
->show_option_requested
= value
;
1805 case OPT_ffast_math
:
1806 set_fast_math_flags (opts
, value
);
1809 case OPT_funsafe_math_optimizations
:
1810 set_unsafe_math_optimizations_flags (opts
, value
);
1817 case OPT_finline_limit_
:
1818 set_param_value ("max-inline-insns-single", value
/ 2,
1819 opts
->x_param_values
, opts_set
->x_param_values
);
1820 set_param_value ("max-inline-insns-auto", value
/ 2,
1821 opts
->x_param_values
, opts_set
->x_param_values
);
1824 case OPT_finstrument_functions_exclude_function_list_
:
1825 add_comma_separated_to_vector
1826 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1829 case OPT_finstrument_functions_exclude_file_list_
:
1830 add_comma_separated_to_vector
1831 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1834 case OPT_fmessage_length_
:
1835 pp_set_line_maximum_length (dc
->printer
, value
);
1836 diagnostic_set_caret_max_width (dc
, value
);
1840 case OPT_fopt_info_
:
1848 #ifndef ACCEL_COMPILER
1849 case OPT_foffload_abi_
:
1850 error_at (loc
, "-foffload-abi option can be specified only for "
1851 "offload compiler");
1855 case OPT_fpack_struct_
:
1856 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1858 "structure alignment must be a small power of two, not %d",
1861 opts
->x_initial_max_fld_align
= value
;
1865 case OPT_fplugin_arg_
:
1869 case OPT_fprofile_use_
:
1870 opts
->x_profile_data_prefix
= xstrdup (arg
);
1871 opts
->x_flag_profile_use
= true;
1873 /* No break here - do -fprofile-use processing. */
1874 case OPT_fprofile_use
:
1875 enable_fdo_optimizations (opts
, opts_set
, value
);
1876 if (!opts_set
->x_flag_profile_reorder_functions
)
1877 opts
->x_flag_profile_reorder_functions
= value
;
1878 /* Indirect call profiling should do all useful transformations
1879 speculative devirtualization does. */
1880 if (!opts_set
->x_flag_devirtualize_speculatively
1881 && opts
->x_flag_value_profile_transformations
)
1882 opts
->x_flag_devirtualize_speculatively
= false;
1885 case OPT_fauto_profile_
:
1886 opts
->x_auto_profile_file
= xstrdup (arg
);
1887 opts
->x_flag_auto_profile
= true;
1889 /* No break here - do -fauto-profile processing. */
1890 case OPT_fauto_profile
:
1891 enable_fdo_optimizations (opts
, opts_set
, value
);
1892 if (!opts_set
->x_flag_profile_correction
)
1893 opts
->x_flag_profile_correction
= value
;
1894 maybe_set_param_value (
1895 PARAM_EARLY_INLINER_MAX_ITERATIONS
, 10,
1896 opts
->x_param_values
, opts_set
->x_param_values
);
1899 case OPT_fprofile_generate_
:
1900 opts
->x_profile_data_prefix
= xstrdup (arg
);
1902 /* No break here - do -fprofile-generate processing. */
1903 case OPT_fprofile_generate
:
1904 if (!opts_set
->x_profile_arc_flag
)
1905 opts
->x_profile_arc_flag
= value
;
1906 if (!opts_set
->x_flag_profile_values
)
1907 opts
->x_flag_profile_values
= value
;
1908 if (!opts_set
->x_flag_inline_functions
)
1909 opts
->x_flag_inline_functions
= value
;
1910 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1911 quadratic. Disable the pass until better memory representation
1913 if (!opts_set
->x_flag_ipa_reference
)
1914 opts
->x_flag_ipa_reference
= false;
1917 case OPT_ftree_vectorize
:
1918 if (!opts_set
->x_flag_tree_loop_vectorize
)
1919 opts
->x_flag_tree_loop_vectorize
= value
;
1920 if (!opts_set
->x_flag_tree_slp_vectorize
)
1921 opts
->x_flag_tree_slp_vectorize
= value
;
1923 case OPT_fshow_column
:
1924 dc
->show_column
= value
;
1927 case OPT_frandom_seed
:
1928 /* The real switch is -fno-random-seed. */
1934 case OPT_frandom_seed_
:
1938 case OPT_fsched_verbose_
:
1939 #ifdef INSN_SCHEDULING
1940 /* Handled with Var in common.opt. */
1946 case OPT_fsched_stalled_insns_
:
1947 opts
->x_flag_sched_stalled_insns
= value
;
1948 if (opts
->x_flag_sched_stalled_insns
== 0)
1949 opts
->x_flag_sched_stalled_insns
= -1;
1952 case OPT_fsched_stalled_insns_dep_
:
1953 opts
->x_flag_sched_stalled_insns_dep
= value
;
1956 case OPT_fstack_check_
:
1957 if (!strcmp (arg
, "no"))
1958 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1959 else if (!strcmp (arg
, "generic"))
1960 /* This is the old stack checking method. */
1961 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1962 ? FULL_BUILTIN_STACK_CHECK
1963 : GENERIC_STACK_CHECK
;
1964 else if (!strcmp (arg
, "specific"))
1965 /* This is the new stack checking method. */
1966 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1967 ? FULL_BUILTIN_STACK_CHECK
1968 : STACK_CHECK_STATIC_BUILTIN
1969 ? STATIC_BUILTIN_STACK_CHECK
1970 : GENERIC_STACK_CHECK
;
1972 warning_at (loc
, 0, "unknown stack check parameter %qs", arg
);
1975 case OPT_fstack_limit
:
1976 /* The real switch is -fno-stack-limit. */
1982 case OPT_fstack_limit_register_
:
1983 case OPT_fstack_limit_symbol_
:
1987 case OPT_fstack_usage
:
1988 opts
->x_flag_stack_usage
= value
;
1989 opts
->x_flag_stack_usage_info
= value
!= 0;
1993 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1998 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2002 if (arg
&& strlen (arg
) != 0)
2004 error_at (loc
, "%<-gdwarf%s%> is ambiguous; "
2005 "use %<-gdwarf-%s%> for DWARF version "
2006 "or %<-gdwarf -g%s%> for debug level", arg
, arg
, arg
);
2010 value
= opts
->x_dwarf_version
;
2014 if (value
< 2 || value
> 5)
2015 error_at (loc
, "dwarf version %d is not supported", value
);
2017 opts
->x_dwarf_version
= value
;
2018 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
2021 case OPT_gsplit_dwarf
:
2022 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
2027 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
2032 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
2037 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
2042 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
2048 /* Handled completely via specs. */
2051 case OPT_pedantic_errors
:
2052 dc
->pedantic_errors
= 1;
2053 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
2055 handlers
, opts
, opts_set
,
2060 opts
->x_flag_lto
= value
? "" : NULL
;
2064 dc
->dc_inhibit_warnings
= true;
2067 case OPT_fmax_errors_
:
2068 dc
->max_errors
= value
;
2071 case OPT_fuse_ld_bfd
:
2072 case OPT_fuse_ld_gold
:
2073 case OPT_fuse_linker_plugin
:
2074 /* No-op. Used by the driver and passed to us because it starts with f.*/
2079 opts
->x_flag_trapv
= 0;
2084 opts
->x_flag_wrapv
= 0;
2088 opts
->x_flag_ipa_icf_functions
= value
;
2089 opts
->x_flag_ipa_icf_variables
= value
;
2093 /* If the flag was handled in a standard way, assume the lack of
2094 processing here is intentional. */
2095 gcc_assert (option_flag_var (scode
, opts
));
2099 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
2104 /* Handle --param NAME=VALUE. */
2106 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2107 location_t loc
, const char *carg
)
2112 arg
= xstrdup (carg
);
2113 equal
= strchr (arg
, '=');
2115 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
2119 value
= integral_argument (equal
+ 1);
2121 error_at (loc
, "invalid --param value %qs", equal
+ 1);
2125 set_param_value (arg
, value
,
2126 opts
->x_param_values
, opts_set
->x_param_values
);
2133 /* Used to set the level of strict aliasing warnings in OPTS,
2134 when no level is specified (i.e., when -Wstrict-aliasing, and not
2135 -Wstrict-aliasing=level was given).
2136 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2137 and 0 otherwise. After calling this function, wstrict_aliasing will be
2138 set to the default value of -Wstrict_aliasing=level, currently 3. */
2140 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
2142 gcc_assert (onoff
== 0 || onoff
== 1);
2144 opts
->x_warn_strict_aliasing
= 3;
2146 opts
->x_warn_strict_aliasing
= 0;
2149 /* The following routines are useful in setting all the flags that
2150 -ffast-math and -fno-fast-math imply. */
2152 set_fast_math_flags (struct gcc_options
*opts
, int set
)
2154 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
2156 opts
->x_flag_unsafe_math_optimizations
= set
;
2157 set_unsafe_math_optimizations_flags (opts
, set
);
2159 if (!opts
->frontend_set_flag_finite_math_only
)
2160 opts
->x_flag_finite_math_only
= set
;
2161 if (!opts
->frontend_set_flag_errno_math
)
2162 opts
->x_flag_errno_math
= !set
;
2165 if (!opts
->frontend_set_flag_signaling_nans
)
2166 opts
->x_flag_signaling_nans
= 0;
2167 if (!opts
->frontend_set_flag_rounding_math
)
2168 opts
->x_flag_rounding_math
= 0;
2169 if (!opts
->frontend_set_flag_cx_limited_range
)
2170 opts
->x_flag_cx_limited_range
= 1;
2174 /* When -funsafe-math-optimizations is set the following
2175 flags are set as well. */
2177 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
2179 if (!opts
->frontend_set_flag_trapping_math
)
2180 opts
->x_flag_trapping_math
= !set
;
2181 if (!opts
->frontend_set_flag_signed_zeros
)
2182 opts
->x_flag_signed_zeros
= !set
;
2183 if (!opts
->frontend_set_flag_associative_math
)
2184 opts
->x_flag_associative_math
= set
;
2185 if (!opts
->frontend_set_flag_reciprocal_math
)
2186 opts
->x_flag_reciprocal_math
= set
;
2189 /* Return true iff flags in OPTS are set as if -ffast-math. */
2191 fast_math_flags_set_p (const struct gcc_options
*opts
)
2193 return (!opts
->x_flag_trapping_math
2194 && opts
->x_flag_unsafe_math_optimizations
2195 && opts
->x_flag_finite_math_only
2196 && !opts
->x_flag_signed_zeros
2197 && !opts
->x_flag_errno_math
);
2200 /* Return true iff flags are set as if -ffast-math but using the flags stored
2201 in the struct cl_optimization structure. */
2203 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2205 return (!opt
->x_flag_trapping_math
2206 && opt
->x_flag_unsafe_math_optimizations
2207 && opt
->x_flag_finite_math_only
2208 && !opt
->x_flag_signed_zeros
2209 && !opt
->x_flag_errno_math
);
2212 /* Handle a debug output -g switch for options OPTS
2213 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2214 explicitly), location LOC. EXTENDED is true or false to support
2215 extended output (2 is special and means "-ggdb" was given). */
2217 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
2218 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
2221 opts
->x_use_gnu_debug_info_extensions
= extended
;
2223 if (type
== NO_DEBUG
)
2225 if (opts
->x_write_symbols
== NO_DEBUG
)
2227 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2231 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_LINENO_DEBUGGING_INFO
2232 opts
->x_write_symbols
= DWARF2_DEBUG
;
2233 #elif defined DBX_DEBUGGING_INFO
2234 opts
->x_write_symbols
= DBX_DEBUG
;
2238 if (opts
->x_write_symbols
== NO_DEBUG
)
2239 warning_at (loc
, 0, "target system does not support debug output");
2244 /* Does it conflict with an already selected type? */
2245 if (opts_set
->x_write_symbols
!= NO_DEBUG
2246 && opts
->x_write_symbols
!= NO_DEBUG
2247 && type
!= opts
->x_write_symbols
)
2248 error_at (loc
, "debug format %qs conflicts with prior selection",
2249 debug_type_names
[type
]);
2250 opts
->x_write_symbols
= type
;
2251 opts_set
->x_write_symbols
= type
;
2254 /* A debug flag without a level defaults to level 2.
2255 If off or at level 1, set it to level 2, but if already
2256 at level 3, don't lower it. */
2259 if (opts
->x_debug_info_level
< DINFO_LEVEL_NORMAL
)
2260 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2264 int argval
= integral_argument (arg
);
2266 error_at (loc
, "unrecognised debug output level %qs", arg
);
2267 else if (argval
> 3)
2268 error_at (loc
, "debug output level %qs is too high", arg
);
2270 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2274 /* Arrange to dump core on error for diagnostic context DC. (The
2275 regular error message is still printed first, except in the case of
2279 setup_core_dumping (diagnostic_context
*dc
)
2282 signal (SIGABRT
, SIG_DFL
);
2284 #if defined(HAVE_SETRLIMIT)
2287 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2288 fatal_error (input_location
, "getting core file size maximum limit: %m");
2289 rlim
.rlim_cur
= rlim
.rlim_max
;
2290 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2291 fatal_error (input_location
,
2292 "setting core file size limit to maximum: %m");
2295 diagnostic_abort_on_error (dc
);
2298 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2299 diagnostic context DC. */
2302 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2303 location_t loc
, diagnostic_context
*dc
)
2311 opts
->x_flag_debug_asm
= 1;
2314 opts
->x_flag_print_asm_name
= 1;
2317 opts
->x_flag_dump_rtl_in_asm
= 1;
2318 opts
->x_flag_print_asm_name
= 1;
2321 opts
->x_rtl_dump_and_exit
= 1;
2323 case 'D': /* These are handled by the preprocessor. */
2330 setup_core_dumping (dc
);
2333 opts
->x_flag_dump_all_passed
= true;
2337 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2342 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2343 mask LANG_MASK, option handlers HANDLERS) as an error for option
2344 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2345 NULL), location LOC. This is used by -Werror=. */
2348 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2349 const struct cl_option_handlers
*handlers
,
2350 struct gcc_options
*opts
,
2351 struct gcc_options
*opts_set
,
2352 location_t loc
, diagnostic_context
*dc
)
2357 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2358 new_option
[0] = 'W';
2359 strcpy (new_option
+ 1, arg
);
2360 option_index
= find_opt (new_option
, lang_mask
);
2361 if (option_index
== OPT_SPECIAL_unknown
)
2363 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2367 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2369 control_warning_option (option_index
, (int) kind
, value
,
2371 handlers
, opts
, opts_set
, dc
);
2376 /* Return malloced memory for the name of the option OPTION_INDEX
2377 which enabled a diagnostic (context CONTEXT), originally of type
2378 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2382 option_name (diagnostic_context
*context
, int option_index
,
2383 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2387 /* A warning classified as an error. */
2388 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2389 && diag_kind
== DK_ERROR
)
2390 return concat (cl_options
[OPT_Werror_
].opt_text
,
2391 /* Skip over "-W". */
2392 cl_options
[option_index
].opt_text
+ 2,
2394 /* A warning with option. */
2396 return xstrdup (cl_options
[option_index
].opt_text
);
2398 /* A warning without option classified as an error. */
2399 else if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2400 || diag_kind
== DK_WARNING
)
2401 && context
->warning_as_error_requested
)
2402 return xstrdup (cl_options
[OPT_Werror
].opt_text
);