1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
5 Free Software Foundation, Inc.
6 Contributed by Neil Booth.
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
27 #include "coretypes.h"
30 #include "tm.h" /* For STACK_CHECK_BUILTIN,
31 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
32 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
35 #include "diagnostic.h"
36 #include "opts-diagnostic.h"
37 #include "insn-attr-common.h"
38 #include "common/common-target.h"
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 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
145 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
147 if (val
< MAX_VERBOSITY_LEVEL
)
148 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
150 opts
->x_user_vect_verbosity_level
151 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
155 /* Strip off a legitimate source ending from the input string NAME of
156 length LEN. Rather than having to know the names used by all of
157 our front ends, we strip off an ending of a period followed by
158 up to five characters. (Java uses ".class".) */
161 strip_off_ending (char *name
, int len
)
164 for (i
= 2; i
< 6 && len
> i
; i
++)
166 if (name
[len
- i
] == '.')
168 name
[len
- i
] = '\0';
174 /* Find the base name of a path, stripping off both directories and
175 a single final extension. */
177 base_of_path (const char *path
, const char **base_out
)
179 const char *base
= path
;
181 const char *p
= path
;
185 if (IS_DIR_SEPARATOR(c
))
200 /* What to print when a switch has no documentation. */
201 static const char undocumented_msg
[] = N_("This switch lacks documentation");
203 typedef char *char_p
; /* For DEF_VEC_P. */
205 DEF_VEC_ALLOC_P(char_p
,heap
);
207 static void handle_param (struct gcc_options
*opts
,
208 struct gcc_options
*opts_set
, location_t loc
,
210 static void set_debug_level (enum debug_info_type type
, int extended
,
211 const char *arg
, struct gcc_options
*opts
,
212 struct gcc_options
*opts_set
,
214 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
215 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
216 location_t loc
, diagnostic_context
*dc
);
217 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
219 static void enable_warning_as_error (const char *arg
, int value
,
220 unsigned int lang_mask
,
221 const struct cl_option_handlers
*handlers
,
222 struct gcc_options
*opts
,
223 struct gcc_options
*opts_set
,
225 diagnostic_context
*dc
);
227 /* Handle a back-end option; arguments and return value as for
231 target_handle_option (struct gcc_options
*opts
,
232 struct gcc_options
*opts_set
,
233 const struct cl_decoded_option
*decoded
,
234 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
236 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
237 diagnostic_context
*dc
)
239 gcc_assert (dc
== global_dc
);
240 gcc_assert (kind
== DK_UNSPECIFIED
);
241 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
244 /* Add comma-separated strings to a char_p vector. */
247 add_comma_separated_to_vector (void **pvec
, const char *arg
)
253 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
255 /* We never free this string. */
268 VEC_safe_push (char_p
, heap
, vec
, token_start
);
271 if (*r
== '\\' && r
[1] == ',')
279 if (*token_start
!= '\0')
280 VEC_safe_push (char_p
, heap
, vec
, token_start
);
285 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
288 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
290 size_t num_params
= get_num_compiler_params ();
292 *opts
= global_options_init
;
293 memset (opts_set
, 0, sizeof (*opts_set
));
295 opts
->x_param_values
= XNEWVEC (int, num_params
);
296 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
297 init_param_values (opts
->x_param_values
);
299 /* Initialize whether `char' is signed. */
300 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
301 /* Set this to a special "uninitialized" value. The actual default
302 is set after target options have been processed. */
303 opts
->x_flag_short_enums
= 2;
305 /* Initialize target_flags before default_options_optimization
306 so the latter can modify it. */
307 opts
->x_target_flags
= targetm_common
.default_target_flags
;
309 /* Some targets have ABI-specified unwind tables. */
310 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
312 /* Some targets have other target-specific initialization. */
313 targetm_common
.option_init_struct (opts
);
316 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
317 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
318 OPTS_SET, diagnostic context DC, location LOC, with language mask
319 LANG_MASK and option handlers HANDLERS. */
322 maybe_default_option (struct gcc_options
*opts
,
323 struct gcc_options
*opts_set
,
324 const struct default_options
*default_opt
,
325 int level
, bool size
, bool fast
,
326 unsigned int lang_mask
,
327 const struct cl_option_handlers
*handlers
,
329 diagnostic_context
*dc
)
331 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
335 gcc_assert (level
== 2);
337 gcc_assert (level
== 3);
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
);
357 case OPT_LEVELS_2_PLUS
:
358 enabled
= (level
>= 2);
361 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
362 enabled
= (level
>= 2 && !size
);
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
,
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
, lang_mask
, handlers
, loc
, dc
);
421 /* Table of options enabled by default at different levels. */
423 static const struct default_options default_options_table
[] =
425 /* -O1 optimizations. */
426 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
457 /* -O2 optimizations. */
458 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
470 #ifdef INSN_SCHEDULING
471 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
472 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
495 /* -O3 optimizations. */
496 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
497 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
498 /* Inlining of functions reducing size is a good idea with -Os
499 regardless of them being declared inline. */
500 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
501 { OPT_LEVELS_1_PLUS
, OPT_finline_functions_called_once
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
503 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
504 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
505 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model
, NULL
, 1 },
506 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
507 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
509 /* -Ofast adds optimizations to -O3. */
510 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
512 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
515 /* Default the options in OPTS and OPTS_SET based on the optimization
516 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
518 default_options_optimization (struct gcc_options
*opts
,
519 struct gcc_options
*opts_set
,
520 struct cl_decoded_option
*decoded_options
,
521 unsigned int decoded_options_count
,
523 unsigned int lang_mask
,
524 const struct cl_option_handlers
*handlers
,
525 diagnostic_context
*dc
)
530 /* Scan to see what optimization level has been specified. That will
531 determine the default value of many flags. */
532 for (i
= 1; i
< decoded_options_count
; i
++)
534 struct cl_decoded_option
*opt
= &decoded_options
[i
];
535 switch (opt
->opt_index
)
538 if (*opt
->arg
== '\0')
540 opts
->x_optimize
= 1;
541 opts
->x_optimize_size
= 0;
542 opts
->x_optimize_fast
= 0;
546 const int optimize_val
= integral_argument (opt
->arg
);
547 if (optimize_val
== -1)
549 "argument to %qs should be a non-negative integer",
553 opts
->x_optimize
= optimize_val
;
554 if ((unsigned int) opts
->x_optimize
> 255)
555 opts
->x_optimize
= 255;
556 opts
->x_optimize_size
= 0;
557 opts
->x_optimize_fast
= 0;
563 opts
->x_optimize_size
= 1;
565 /* Optimizing for size forces optimize to be 2. */
566 opts
->x_optimize
= 2;
567 opts
->x_optimize_fast
= 0;
571 /* -Ofast only adds flags to -O3. */
572 opts
->x_optimize_size
= 0;
573 opts
->x_optimize
= 3;
574 opts
->x_optimize_fast
= 1;
578 /* Ignore other options in this prescan. */
583 maybe_default_options (opts
, opts_set
, default_options_table
,
584 opts
->x_optimize
, opts
->x_optimize_size
,
585 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
587 /* -O2 param settings. */
588 opt2
= (opts
->x_optimize
>= 2);
590 /* Track fields in field-sensitive alias analysis. */
591 maybe_set_param_value
592 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
593 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
594 opts
->x_param_values
, opts_set
->x_param_values
);
596 /* For -O1 only do loop invariant motion for very small loops. */
597 maybe_set_param_value
598 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
599 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
600 opts
->x_param_values
, opts_set
->x_param_values
);
602 if (opts
->x_optimize_size
)
603 /* We want to crossjump as much as possible. */
604 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
605 opts
->x_param_values
, opts_set
->x_param_values
);
607 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
608 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
609 opts
->x_param_values
, opts_set
->x_param_values
);
611 /* Allow default optimizations to be specified on a per-machine basis. */
612 maybe_default_options (opts
, opts_set
,
613 targetm_common
.option_optimization_table
,
614 opts
->x_optimize
, opts
->x_optimize_size
,
615 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
618 /* After all options at LOC have been read into OPTS and OPTS_SET,
619 finalize settings of those options and diagnose incompatible
622 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
625 enum unwind_info_type ui_except
;
627 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
629 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
630 OPTS->X_DUMP_DIR_NAME directory. Then try to make
631 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
632 directory, typically the directory to contain the object
634 if (opts
->x_dump_dir_name
)
635 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
636 opts
->x_dump_base_name
, NULL
);
637 else if (opts
->x_aux_base_name
638 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
640 const char *aux_base
;
642 base_of_path (opts
->x_aux_base_name
, &aux_base
);
643 if (opts
->x_aux_base_name
!= aux_base
)
645 int dir_len
= aux_base
- opts
->x_aux_base_name
;
646 char *new_dump_base_name
=
647 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
649 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
650 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
651 /* Append existing OPTS->X_DUMP_BASE_NAME. */
652 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
653 opts
->x_dump_base_name
= new_dump_base_name
;
658 /* Handle related options for unit-at-a-time, toplevel-reorder, and
660 if (!opts
->x_flag_unit_at_a_time
)
662 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
663 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
665 opts
->x_flag_section_anchors
= 0;
666 if (opts
->x_flag_toplevel_reorder
== 1)
667 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
669 opts
->x_flag_toplevel_reorder
= 0;
672 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
673 sorry ("transactional memory is not supported with non-call exceptions");
675 /* Unless the user has asked for section anchors, we disable toplevel
676 reordering at -O0 to disable transformations that might be surprising
677 to end users and to get -fno-toplevel-reorder tested. */
678 if (!opts
->x_optimize
679 && opts
->x_flag_toplevel_reorder
== 2
680 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
682 opts
->x_flag_toplevel_reorder
= 0;
683 opts
->x_flag_section_anchors
= 0;
685 if (!opts
->x_flag_toplevel_reorder
)
687 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
688 error_at (loc
, "section anchors must be disabled when toplevel reorder"
690 opts
->x_flag_section_anchors
= 0;
693 if (!opts
->x_flag_opts_finished
)
695 if (opts
->x_flag_pie
)
696 opts
->x_flag_pic
= opts
->x_flag_pie
;
697 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
698 opts
->x_flag_shlib
= 1;
699 opts
->x_flag_opts_finished
= true;
702 if (opts
->x_optimize
== 0)
704 /* Inlining does not work if not optimizing,
705 so force it not to be done. */
706 opts
->x_warn_inline
= 0;
707 opts
->x_flag_no_inline
= 1;
710 /* The optimization to partition hot and cold basic blocks into separate
711 sections of the .o and executable files does not work (currently)
712 with exception handling. This is because there is no support for
713 generating unwind info. If opts->x_flag_exceptions is turned on
714 we need to turn off the partitioning optimization. */
716 ui_except
= targetm_common
.except_unwind_info (opts
);
718 if (opts
->x_flag_exceptions
719 && opts
->x_flag_reorder_blocks_and_partition
720 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
723 "-freorder-blocks-and-partition does not work "
724 "with exceptions on this architecture");
725 opts
->x_flag_reorder_blocks_and_partition
= 0;
726 opts
->x_flag_reorder_blocks
= 1;
729 /* If user requested unwind info, then turn off the partitioning
732 if (opts
->x_flag_unwind_tables
733 && !targetm_common
.unwind_tables_default
734 && opts
->x_flag_reorder_blocks_and_partition
735 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
738 "-freorder-blocks-and-partition does not support "
739 "unwind info on this architecture");
740 opts
->x_flag_reorder_blocks_and_partition
= 0;
741 opts
->x_flag_reorder_blocks
= 1;
744 /* If the target requested unwind info, then turn off the partitioning
745 optimization with a different message. Likewise, if the target does not
746 support named sections. */
748 if (opts
->x_flag_reorder_blocks_and_partition
749 && (!targetm_common
.have_named_sections
750 || (opts
->x_flag_unwind_tables
751 && targetm_common
.unwind_tables_default
752 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
755 "-freorder-blocks-and-partition does not work "
756 "on this architecture");
757 opts
->x_flag_reorder_blocks_and_partition
= 0;
758 opts
->x_flag_reorder_blocks
= 1;
761 if (opts
->x_flag_reorder_blocks_and_partition
762 && !opts_set
->x_flag_reorder_functions
)
763 opts
->x_flag_reorder_functions
= 1;
765 /* Pipelining of outer loops is only possible when general pipelining
766 capabilities are requested. */
767 if (!opts
->x_flag_sel_sched_pipelining
)
768 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
770 if (opts
->x_flag_conserve_stack
)
772 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
773 opts
->x_param_values
, opts_set
->x_param_values
);
774 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
775 opts
->x_param_values
, opts_set
->x_param_values
);
778 if (opts
->x_flag_lto
)
781 opts
->x_flag_generate_lto
= 1;
783 /* When generating IL, do not operate in whole-program mode.
784 Otherwise, symbols will be privatized too early, causing link
786 opts
->x_flag_whole_program
= 0;
788 error_at (loc
, "LTO support has not been enabled in this configuration");
790 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
791 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
793 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
794 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
796 if ((opts
->x_flag_lto_partition_balanced
!= 0)
797 + (opts
->x_flag_lto_partition_1to1
!= 0)
798 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
799 error_at (loc
, "only one -flto-partition value can be specified");
802 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
803 default value if they choose based on other options. */
804 if (opts
->x_flag_split_stack
== -1)
805 opts
->x_flag_split_stack
= 0;
806 else if (opts
->x_flag_split_stack
)
808 if (!targetm_common
.supports_split_stack (true, opts
))
810 error_at (loc
, "%<-fsplit-stack%> is not supported by "
811 "this compiler configuration");
812 opts
->x_flag_split_stack
= 0;
816 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
818 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
819 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
820 opts
->x_param_values
, opts_set
->x_param_values
);
822 /* This replaces set_Wunused. */
823 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
824 if (opts
->x_warn_unused_parameter
== -1)
825 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
826 && opts
->x_extra_warnings
);
827 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
829 if (opts
->x_warn_unused_but_set_parameter
== -1)
830 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
831 && opts
->x_extra_warnings
);
832 /* Wunused-local-typedefs is enabled by -Wunused or -Wall. */
833 if (opts
->x_warn_unused_local_typedefs
== -1)
834 opts
->x_warn_unused_local_typedefs
= opts
->x_warn_unused
;
837 #define LEFT_COLUMN 27
839 /* Output ITEM, of length ITEM_WIDTH, in the left column,
840 followed by word-wrapped HELP in a second column. */
842 wrap_help (const char *help
,
844 unsigned int item_width
,
845 unsigned int columns
)
847 unsigned int col_width
= LEFT_COLUMN
;
848 unsigned int remaining
, room
, len
;
850 remaining
= strlen (help
);
854 room
= columns
- 3 - MAX (col_width
, item_width
);
863 for (i
= 0; help
[i
]; i
++)
865 if (i
>= room
&& len
!= remaining
)
869 else if ((help
[i
] == '-' || help
[i
] == '/')
870 && help
[i
+ 1] != ' '
871 && i
> 0 && ISALPHA (help
[i
- 1]))
876 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
878 while (help
[len
] == ' ')
886 /* Print help for a specific front-end, etc. */
888 print_filtered_help (unsigned int include_flags
,
889 unsigned int exclude_flags
,
890 unsigned int any_flags
,
891 unsigned int columns
,
892 struct gcc_options
*opts
,
893 unsigned int lang_mask
)
898 bool displayed
= false;
900 if (include_flags
== CL_PARAMS
)
902 for (i
= 0; i
< LAST_PARAM
; i
++)
904 const char *param
= compiler_params
[i
].option
;
906 help
= compiler_params
[i
].help
;
907 if (help
== NULL
|| *help
== '\0')
909 if (exclude_flags
& CL_UNDOCUMENTED
)
911 help
= undocumented_msg
;
914 /* Get the translation. */
917 wrap_help (help
, param
, strlen (param
), columns
);
923 if (!opts
->x_help_printed
)
924 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
926 if (!opts
->x_help_enum_printed
)
927 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
929 for (i
= 0; i
< cl_options_count
; i
++)
932 const struct cl_option
*option
= cl_options
+ i
;
937 if (include_flags
== 0
938 || ((option
->flags
& include_flags
) != include_flags
))
940 if ((option
->flags
& any_flags
) == 0)
944 /* Skip unwanted switches. */
945 if ((option
->flags
& exclude_flags
) != 0)
948 /* The driver currently prints its own help text. */
949 if ((option
->flags
& CL_DRIVER
) != 0
950 && (option
->flags
& (((1U << cl_lang_count
) - 1)
951 | CL_COMMON
| CL_TARGET
)) == 0)
955 /* Skip switches that have already been printed. */
956 if (opts
->x_help_printed
[i
])
959 opts
->x_help_printed
[i
] = true;
964 if (exclude_flags
& CL_UNDOCUMENTED
)
966 help
= undocumented_msg
;
969 /* Get the translation. */
972 /* Find the gap between the name of the
973 option and its descriptive text. */
974 tab
= strchr (help
, '\t');
983 opt
= option
->opt_text
;
987 /* With the -Q option enabled we change the descriptive text associated
988 with an option to be an indication of its current setting. */
989 if (!opts
->x_quiet_flag
)
991 void *flag_var
= option_flag_var (i
, opts
);
993 if (len
< (LEFT_COLUMN
+ 2))
994 strcpy (new_help
, "\t\t");
996 strcpy (new_help
, "\t");
999 && option
->var_type
!= CLVC_DEFER
)
1001 if (option
->flags
& CL_JOINED
)
1003 if (option
->var_type
== CLVC_STRING
)
1005 if (* (const char **) flag_var
!= NULL
)
1006 snprintf (new_help
+ strlen (new_help
),
1007 sizeof (new_help
) - strlen (new_help
),
1008 * (const char **) flag_var
);
1010 else if (option
->var_type
== CLVC_ENUM
)
1012 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1014 const char *arg
= NULL
;
1016 value
= e
->get (flag_var
);
1017 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1019 arg
= _("[default]");
1020 snprintf (new_help
+ strlen (new_help
),
1021 sizeof (new_help
) - strlen (new_help
),
1025 sprintf (new_help
+ strlen (new_help
),
1026 "%#x", * (int *) flag_var
);
1029 strcat (new_help
, option_enabled (i
, opts
)
1030 ? _("[enabled]") : _("[disabled]"));
1036 wrap_help (help
, opt
, len
, columns
);
1039 if (option
->var_type
== CLVC_ENUM
1040 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1041 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1046 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1049 printf (_(" No options with the desired characteristics were found\n"));
1054 /* PR 31349: Tell the user how to see all of the
1055 options supported by a specific front end. */
1056 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1057 if ((1U << i
) & langs
)
1058 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1059 lang_names
[i
], lang_names
[i
]);
1063 else if (! displayed
)
1064 printf (_(" All options with the desired characteristics have already been displayed\n"));
1068 /* Print details of enumerated option arguments, if those
1069 enumerations have help text headings provided. If no help text
1070 is provided, presume that the possible values are listed in the
1071 help text for the relevant options. */
1072 for (i
= 0; i
< cl_enums_count
; i
++)
1074 unsigned int j
, pos
;
1076 if (opts
->x_help_enum_printed
[i
] != 1)
1078 if (cl_enums
[i
].help
== NULL
)
1080 printf (" %s\n ", _(cl_enums
[i
].help
));
1082 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1084 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1086 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1088 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1098 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1103 opts
->x_help_enum_printed
[i
] = 2;
1107 /* Display help for a specified type of option.
1108 The options must have ALL of the INCLUDE_FLAGS set
1109 ANY of the flags in the ANY_FLAGS set
1110 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1111 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1113 print_specific_help (unsigned int include_flags
,
1114 unsigned int exclude_flags
,
1115 unsigned int any_flags
,
1116 struct gcc_options
*opts
,
1117 unsigned int lang_mask
)
1119 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1120 const char * description
= NULL
;
1121 const char * descrip_extra
= "";
1125 /* Sanity check: Make sure that we do not have more
1126 languages than we have bits available to enumerate them. */
1127 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1129 /* If we have not done so already, obtain
1130 the desired maximum width of the output. */
1131 if (opts
->x_help_columns
== 0)
1135 p
= getenv ("COLUMNS");
1138 int value
= atoi (p
);
1141 opts
->x_help_columns
= value
;
1144 if (opts
->x_help_columns
== 0)
1145 /* Use a reasonable default. */
1146 opts
->x_help_columns
= 80;
1149 /* Decide upon the title for the options that we are going to display. */
1150 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1152 switch (flag
& include_flags
)
1159 description
= _("The following options are target specific");
1162 description
= _("The following options control compiler warning messages");
1164 case CL_OPTIMIZATION
:
1165 description
= _("The following options control optimizations");
1168 description
= _("The following options are language-independent");
1171 description
= _("The --param option recognizes the following as parameters");
1174 if (i
>= cl_lang_count
)
1176 if (exclude_flags
& all_langs_mask
)
1177 description
= _("The following options are specific to just the language ");
1179 description
= _("The following options are supported by the language ");
1180 descrip_extra
= lang_names
[i
];
1185 if (description
== NULL
)
1189 if (include_flags
& CL_UNDOCUMENTED
)
1190 description
= _("The following options are not documented");
1191 else if (include_flags
& CL_SEPARATE
)
1192 description
= _("The following options take separate arguments");
1193 else if (include_flags
& CL_JOINED
)
1194 description
= _("The following options take joined arguments");
1197 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1204 if (any_flags
& all_langs_mask
)
1205 description
= _("The following options are language-related");
1207 description
= _("The following options are language-independent");
1211 printf ("%s%s:\n", description
, descrip_extra
);
1212 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1213 opts
->x_help_columns
, opts
, lang_mask
);
1216 /* Handle target- and language-independent options. Return zero to
1217 generate an "unknown option" message. Only options that need
1218 extra handling need to be listed here; if you simply want
1219 DECODED->value assigned to a variable, it happens automatically. */
1222 common_handle_option (struct gcc_options
*opts
,
1223 struct gcc_options
*opts_set
,
1224 const struct cl_decoded_option
*decoded
,
1225 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1227 const struct cl_option_handlers
*handlers
,
1228 diagnostic_context
*dc
)
1230 size_t scode
= decoded
->opt_index
;
1231 const char *arg
= decoded
->arg
;
1232 int value
= decoded
->value
;
1233 enum opt_code code
= (enum opt_code
) scode
;
1235 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1240 handle_param (opts
, opts_set
, loc
, arg
);
1245 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1246 unsigned int undoc_mask
;
1249 if (lang_mask
== CL_DRIVER
)
1252 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1255 /* First display any single language specific options. */
1256 for (i
= 0; i
< cl_lang_count
; i
++)
1258 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1260 /* Next display any multi language specific options. */
1261 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1262 /* Then display any remaining, non-language options. */
1263 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1265 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1266 opts
->x_exit_after_options
= true;
1270 case OPT__target_help
:
1271 if (lang_mask
== CL_DRIVER
)
1274 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1275 opts
->x_exit_after_options
= true;
1280 const char * a
= arg
;
1281 unsigned int include_flags
= 0;
1282 /* Note - by default we include undocumented options when listing
1283 specific classes. If you only want to see documented options
1284 then add ",^undocumented" to the --help= option. E.g.:
1286 --help=target,^undocumented */
1287 unsigned int exclude_flags
= 0;
1289 if (lang_mask
== CL_DRIVER
)
1292 /* Walk along the argument string, parsing each word in turn.
1294 arg = [^]{word}[,{arg}]
1295 word = {optimizers|target|warnings|undocumented|
1296 params|common|<language>} */
1301 const char * string
;
1306 { "optimizers", CL_OPTIMIZATION
},
1307 { "target", CL_TARGET
},
1308 { "warnings", CL_WARNING
},
1309 { "undocumented", CL_UNDOCUMENTED
},
1310 { "params", CL_PARAMS
},
1311 { "joined", CL_JOINED
},
1312 { "separate", CL_SEPARATE
},
1313 { "common", CL_COMMON
},
1316 unsigned int * pflags
;
1318 unsigned int lang_flag
, specific_flag
;
1325 pflags
= & exclude_flags
;
1328 pflags
= & include_flags
;
1330 comma
= strchr (a
, ',');
1341 /* Check to see if the string matches an option class name. */
1342 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1343 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1345 specific_flag
= specifics
[i
].flag
;
1349 /* Check to see if the string matches a language name.
1350 Note - we rely upon the alpha-sorted nature of the entries in
1351 the lang_names array, specifically that shorter names appear
1352 before their longer variants. (i.e. C before C++). That way
1353 when we are attempting to match --help=c for example we will
1354 match with C first and not C++. */
1355 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1356 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1358 lang_flag
= 1U << i
;
1362 if (specific_flag
!= 0)
1365 * pflags
|= specific_flag
;
1368 /* The option's argument matches both the start of a
1369 language name and the start of an option class name.
1370 We have a special case for when the user has
1371 specified "--help=c", but otherwise we have to issue
1373 if (strncasecmp (a
, "c", len
) == 0)
1374 * pflags
|= lang_flag
;
1377 "--help argument %q.*s is ambiguous, "
1378 "please be more specific",
1382 else if (lang_flag
!= 0)
1383 * pflags
|= lang_flag
;
1386 "unrecognized argument to --help= option: %q.*s",
1395 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1397 opts
->x_exit_after_options
= true;
1402 if (lang_mask
== CL_DRIVER
)
1405 opts
->x_exit_after_options
= true;
1411 /* Currently handled in a prescan. */
1415 dc
->warning_as_error_requested
= value
;
1419 if (lang_mask
== CL_DRIVER
)
1422 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1423 opts
, opts_set
, loc
, dc
);
1426 case OPT_Wlarger_than_
:
1427 opts
->x_larger_than_size
= value
;
1428 opts
->x_warn_larger_than
= value
!= -1;
1431 case OPT_Wfatal_errors
:
1432 dc
->fatal_errors
= value
;
1435 case OPT_Wframe_larger_than_
:
1436 opts
->x_frame_larger_than_size
= value
;
1437 opts
->x_warn_frame_larger_than
= value
!= -1;
1440 case OPT_Wstack_usage_
:
1441 opts
->x_warn_stack_usage
= value
;
1442 opts
->x_flag_stack_usage_info
= value
!= -1;
1445 case OPT_Wstrict_aliasing
:
1446 set_Wstrict_aliasing (opts
, value
);
1449 case OPT_Wstrict_overflow
:
1450 opts
->x_warn_strict_overflow
= (value
1451 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1455 case OPT_Wsystem_headers
:
1456 dc
->dc_warn_system_headers
= value
;
1460 opts
->x_flag_gen_aux_info
= 1;
1463 case OPT_auxbase_strip
:
1465 char *tmp
= xstrdup (arg
);
1466 strip_off_ending (tmp
, strlen (tmp
));
1468 opts
->x_aux_base_name
= tmp
;
1473 decode_d_option (arg
, opts
, loc
, dc
);
1476 case OPT_fcall_used_
:
1477 case OPT_fcall_saved_
:
1482 case OPT_fdbg_cnt_list
:
1486 case OPT_fdebug_prefix_map_
:
1490 case OPT_fdiagnostics_show_location_
:
1491 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1494 case OPT_fdiagnostics_show_caret
:
1495 dc
->show_caret
= value
;
1498 case OPT_fdiagnostics_show_option
:
1499 dc
->show_option_requested
= value
;
1506 case OPT_ffast_math
:
1507 set_fast_math_flags (opts
, value
);
1510 case OPT_funsafe_math_optimizations
:
1511 set_unsafe_math_optimizations_flags (opts
, value
);
1518 case OPT_finline_limit_
:
1519 set_param_value ("max-inline-insns-single", value
/ 2,
1520 opts
->x_param_values
, opts_set
->x_param_values
);
1521 set_param_value ("max-inline-insns-auto", value
/ 2,
1522 opts
->x_param_values
, opts_set
->x_param_values
);
1525 case OPT_finstrument_functions_exclude_function_list_
:
1526 add_comma_separated_to_vector
1527 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1530 case OPT_finstrument_functions_exclude_file_list_
:
1531 add_comma_separated_to_vector
1532 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1535 case OPT_fmessage_length_
:
1536 pp_set_line_maximum_length (dc
->printer
, value
);
1537 diagnostic_set_caret_max_width (dc
, value
);
1540 case OPT_fpack_struct_
:
1541 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1543 "structure alignment must be a small power of two, not %d",
1546 opts
->x_initial_max_fld_align
= value
;
1550 case OPT_fplugin_arg_
:
1554 case OPT_fprofile_use_
:
1555 opts
->x_profile_data_prefix
= xstrdup (arg
);
1556 opts
->x_flag_profile_use
= true;
1558 /* No break here - do -fprofile-use processing. */
1559 case OPT_fprofile_use
:
1560 if (!opts_set
->x_flag_branch_probabilities
)
1561 opts
->x_flag_branch_probabilities
= value
;
1562 if (!opts_set
->x_flag_profile_values
)
1563 opts
->x_flag_profile_values
= value
;
1564 if (!opts_set
->x_flag_unroll_loops
)
1565 opts
->x_flag_unroll_loops
= value
;
1566 if (!opts_set
->x_flag_peel_loops
)
1567 opts
->x_flag_peel_loops
= value
;
1568 if (!opts_set
->x_flag_tracer
)
1569 opts
->x_flag_tracer
= value
;
1570 if (!opts_set
->x_flag_value_profile_transformations
)
1571 opts
->x_flag_value_profile_transformations
= value
;
1572 if (!opts_set
->x_flag_inline_functions
)
1573 opts
->x_flag_inline_functions
= value
;
1574 if (!opts_set
->x_flag_ipa_cp
)
1575 opts
->x_flag_ipa_cp
= value
;
1576 if (!opts_set
->x_flag_ipa_cp_clone
1577 && value
&& opts
->x_flag_ipa_cp
)
1578 opts
->x_flag_ipa_cp_clone
= value
;
1579 if (!opts_set
->x_flag_predictive_commoning
)
1580 opts
->x_flag_predictive_commoning
= value
;
1581 if (!opts_set
->x_flag_unswitch_loops
)
1582 opts
->x_flag_unswitch_loops
= value
;
1583 if (!opts_set
->x_flag_gcse_after_reload
)
1584 opts
->x_flag_gcse_after_reload
= value
;
1587 case OPT_fprofile_generate_
:
1588 opts
->x_profile_data_prefix
= xstrdup (arg
);
1590 /* No break here - do -fprofile-generate processing. */
1591 case OPT_fprofile_generate
:
1592 if (!opts_set
->x_profile_arc_flag
)
1593 opts
->x_profile_arc_flag
= value
;
1594 if (!opts_set
->x_flag_profile_values
)
1595 opts
->x_flag_profile_values
= value
;
1596 if (!opts_set
->x_flag_inline_functions
)
1597 opts
->x_flag_inline_functions
= value
;
1598 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1599 quadratic. Disable the pass until better memory representation
1601 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1602 opts
->x_flag_ipa_reference
= false;
1605 case OPT_fshow_column
:
1606 dc
->show_column
= value
;
1609 case OPT_frandom_seed
:
1610 /* The real switch is -fno-random-seed. */
1616 case OPT_frandom_seed_
:
1620 case OPT_fsched_verbose_
:
1621 #ifdef INSN_SCHEDULING
1622 /* Handled with Var in common.opt. */
1628 case OPT_fsched_stalled_insns_
:
1629 opts
->x_flag_sched_stalled_insns
= value
;
1630 if (opts
->x_flag_sched_stalled_insns
== 0)
1631 opts
->x_flag_sched_stalled_insns
= -1;
1634 case OPT_fsched_stalled_insns_dep_
:
1635 opts
->x_flag_sched_stalled_insns_dep
= value
;
1638 case OPT_fstack_check_
:
1639 if (!strcmp (arg
, "no"))
1640 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1641 else if (!strcmp (arg
, "generic"))
1642 /* This is the old stack checking method. */
1643 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1644 ? FULL_BUILTIN_STACK_CHECK
1645 : GENERIC_STACK_CHECK
;
1646 else if (!strcmp (arg
, "specific"))
1647 /* This is the new stack checking method. */
1648 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1649 ? FULL_BUILTIN_STACK_CHECK
1650 : STACK_CHECK_STATIC_BUILTIN
1651 ? STATIC_BUILTIN_STACK_CHECK
1652 : GENERIC_STACK_CHECK
;
1654 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1657 case OPT_fstack_limit
:
1658 /* The real switch is -fno-stack-limit. */
1664 case OPT_fstack_limit_register_
:
1665 case OPT_fstack_limit_symbol_
:
1669 case OPT_fstack_usage
:
1670 opts
->x_flag_stack_usage
= value
;
1671 opts
->x_flag_stack_usage_info
= value
!= 0;
1674 case OPT_ftree_vectorizer_verbose_
:
1675 vect_set_verbosity_level (opts
, value
);
1679 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1684 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1688 if (value
< 2 || value
> 4)
1689 error_at (loc
, "dwarf version %d is not supported", value
);
1691 opts
->x_dwarf_version
= value
;
1692 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1696 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1701 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1706 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1711 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1715 case OPT_pedantic_errors
:
1716 dc
->pedantic_errors
= 1;
1717 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1719 handlers
, opts
, opts_set
,
1724 opts
->x_flag_lto
= value
? "" : NULL
;
1728 dc
->dc_inhibit_warnings
= true;
1731 case OPT_fmax_errors_
:
1732 dc
->max_errors
= value
;
1735 case OPT_fuse_linker_plugin
:
1736 /* No-op. Used by the driver and passed to us because it starts with f.*/
1740 /* If the flag was handled in a standard way, assume the lack of
1741 processing here is intentional. */
1742 gcc_assert (option_flag_var (scode
, opts
));
1746 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
1751 /* Handle --param NAME=VALUE. */
1753 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1754 location_t loc
, const char *carg
)
1759 arg
= xstrdup (carg
);
1760 equal
= strchr (arg
, '=');
1762 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1766 value
= integral_argument (equal
+ 1);
1768 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1772 set_param_value (arg
, value
,
1773 opts
->x_param_values
, opts_set
->x_param_values
);
1780 /* Used to set the level of strict aliasing warnings in OPTS,
1781 when no level is specified (i.e., when -Wstrict-aliasing, and not
1782 -Wstrict-aliasing=level was given).
1783 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1784 and 0 otherwise. After calling this function, wstrict_aliasing will be
1785 set to the default value of -Wstrict_aliasing=level, currently 3. */
1787 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1789 gcc_assert (onoff
== 0 || onoff
== 1);
1791 opts
->x_warn_strict_aliasing
= 3;
1793 opts
->x_warn_strict_aliasing
= 0;
1796 /* The following routines are useful in setting all the flags that
1797 -ffast-math and -fno-fast-math imply. */
1799 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1801 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1803 opts
->x_flag_unsafe_math_optimizations
= set
;
1804 set_unsafe_math_optimizations_flags (opts
, set
);
1806 if (!opts
->frontend_set_flag_finite_math_only
)
1807 opts
->x_flag_finite_math_only
= set
;
1808 if (!opts
->frontend_set_flag_errno_math
)
1809 opts
->x_flag_errno_math
= !set
;
1812 if (!opts
->frontend_set_flag_signaling_nans
)
1813 opts
->x_flag_signaling_nans
= 0;
1814 if (!opts
->frontend_set_flag_rounding_math
)
1815 opts
->x_flag_rounding_math
= 0;
1816 if (!opts
->frontend_set_flag_cx_limited_range
)
1817 opts
->x_flag_cx_limited_range
= 1;
1821 /* When -funsafe-math-optimizations is set the following
1822 flags are set as well. */
1824 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1826 if (!opts
->frontend_set_flag_trapping_math
)
1827 opts
->x_flag_trapping_math
= !set
;
1828 if (!opts
->frontend_set_flag_signed_zeros
)
1829 opts
->x_flag_signed_zeros
= !set
;
1830 if (!opts
->frontend_set_flag_associative_math
)
1831 opts
->x_flag_associative_math
= set
;
1832 if (!opts
->frontend_set_flag_reciprocal_math
)
1833 opts
->x_flag_reciprocal_math
= set
;
1836 /* Return true iff flags in OPTS are set as if -ffast-math. */
1838 fast_math_flags_set_p (const struct gcc_options
*opts
)
1840 return (!opts
->x_flag_trapping_math
1841 && opts
->x_flag_unsafe_math_optimizations
1842 && opts
->x_flag_finite_math_only
1843 && !opts
->x_flag_signed_zeros
1844 && !opts
->x_flag_errno_math
);
1847 /* Return true iff flags are set as if -ffast-math but using the flags stored
1848 in the struct cl_optimization structure. */
1850 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1852 return (!opt
->x_flag_trapping_math
1853 && opt
->x_flag_unsafe_math_optimizations
1854 && opt
->x_flag_finite_math_only
1855 && !opt
->x_flag_signed_zeros
1856 && !opt
->x_flag_errno_math
);
1859 /* Handle a debug output -g switch for options OPTS
1860 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1861 explicitly), location LOC. EXTENDED is true or false to support
1862 extended output (2 is special and means "-ggdb" was given). */
1864 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1865 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1868 opts
->x_use_gnu_debug_info_extensions
= extended
;
1870 if (type
== NO_DEBUG
)
1872 if (opts
->x_write_symbols
== NO_DEBUG
)
1874 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1878 #ifdef DWARF2_DEBUGGING_INFO
1879 opts
->x_write_symbols
= DWARF2_DEBUG
;
1880 #elif defined DBX_DEBUGGING_INFO
1881 opts
->x_write_symbols
= DBX_DEBUG
;
1885 if (opts
->x_write_symbols
== NO_DEBUG
)
1886 warning_at (loc
, 0, "target system does not support debug output");
1891 /* Does it conflict with an already selected type? */
1892 if (opts_set
->x_write_symbols
!= NO_DEBUG
1893 && opts
->x_write_symbols
!= NO_DEBUG
1894 && type
!= opts
->x_write_symbols
)
1895 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1896 debug_type_names
[type
]);
1897 opts
->x_write_symbols
= type
;
1898 opts_set
->x_write_symbols
= type
;
1901 /* A debug flag without a level defaults to level 2. */
1904 if (!opts
->x_debug_info_level
)
1905 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1909 int argval
= integral_argument (arg
);
1911 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1912 else if (argval
> 3)
1913 error_at (loc
, "debug output level %s is too high", arg
);
1915 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1919 /* Arrange to dump core on error for diagnostic context DC. (The
1920 regular error message is still printed first, except in the case of
1924 setup_core_dumping (diagnostic_context
*dc
)
1927 signal (SIGABRT
, SIG_DFL
);
1929 #if defined(HAVE_SETRLIMIT)
1932 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1933 fatal_error ("getting core file size maximum limit: %m");
1934 rlim
.rlim_cur
= rlim
.rlim_max
;
1935 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1936 fatal_error ("setting core file size limit to maximum: %m");
1939 diagnostic_abort_on_error (dc
);
1942 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1943 diagnostic context DC. */
1946 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1947 location_t loc
, diagnostic_context
*dc
)
1955 opts
->x_flag_debug_asm
= 1;
1958 opts
->x_flag_print_asm_name
= 1;
1961 opts
->x_flag_dump_rtl_in_asm
= 1;
1962 opts
->x_flag_print_asm_name
= 1;
1965 opts
->x_graph_dump_format
= vcg
;
1968 opts
->x_rtl_dump_and_exit
= 1;
1970 case 'D': /* These are handled by the preprocessor. */
1977 setup_core_dumping (dc
);
1980 opts
->x_flag_dump_all_passed
= true;
1984 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1989 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1990 mask LANG_MASK, option handlers HANDLERS) as an error for option
1991 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1992 NULL), location LOC. This is used by -Werror=. */
1995 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1996 const struct cl_option_handlers
*handlers
,
1997 struct gcc_options
*opts
,
1998 struct gcc_options
*opts_set
,
1999 location_t loc
, diagnostic_context
*dc
)
2004 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2005 new_option
[0] = 'W';
2006 strcpy (new_option
+ 1, arg
);
2007 option_index
= find_opt (new_option
, lang_mask
);
2008 if (option_index
== OPT_SPECIAL_unknown
)
2010 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2014 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2016 control_warning_option (option_index
, (int) kind
, value
,
2018 handlers
, opts
, opts_set
, dc
);
2023 /* Return malloced memory for the name of the option OPTION_INDEX
2024 which enabled a diagnostic (context CONTEXT), originally of type
2025 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2029 option_name (diagnostic_context
*context
, int option_index
,
2030 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2034 /* A warning classified as an error. */
2035 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2036 && diag_kind
== DK_ERROR
)
2037 return concat (cl_options
[OPT_Werror_
].opt_text
,
2038 /* Skip over "-W". */
2039 cl_options
[option_index
].opt_text
+ 2,
2041 /* A warning with option. */
2043 return xstrdup (cl_options
[option_index
].opt_text
);
2045 /* A warning without option classified as an error. */
2046 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2047 || diag_kind
== DK_WARNING
)
2049 if (context
->warning_as_error_requested
)
2050 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2052 return xstrdup (_("enabled by default"));