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 },
456 /* -O2 optimizations. */
457 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
469 #ifdef INSN_SCHEDULING
470 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
471 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
493 /* -O3 optimizations. */
494 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
495 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
496 /* Inlining of functions reducing size is a good idea with -Os
497 regardless of them being declared inline. */
498 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
499 { OPT_LEVELS_1_PLUS
, OPT_finline_functions_called_once
, NULL
, 1 },
500 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
501 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
503 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
504 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
506 /* -Ofast adds optimizations to -O3. */
507 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
509 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
512 /* Default the options in OPTS and OPTS_SET based on the optimization
513 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
515 default_options_optimization (struct gcc_options
*opts
,
516 struct gcc_options
*opts_set
,
517 struct cl_decoded_option
*decoded_options
,
518 unsigned int decoded_options_count
,
520 unsigned int lang_mask
,
521 const struct cl_option_handlers
*handlers
,
522 diagnostic_context
*dc
)
527 /* Scan to see what optimization level has been specified. That will
528 determine the default value of many flags. */
529 for (i
= 1; i
< decoded_options_count
; i
++)
531 struct cl_decoded_option
*opt
= &decoded_options
[i
];
532 switch (opt
->opt_index
)
535 if (*opt
->arg
== '\0')
537 opts
->x_optimize
= 1;
538 opts
->x_optimize_size
= 0;
539 opts
->x_optimize_fast
= 0;
543 const int optimize_val
= integral_argument (opt
->arg
);
544 if (optimize_val
== -1)
546 "argument to %qs should be a non-negative integer",
550 opts
->x_optimize
= optimize_val
;
551 if ((unsigned int) opts
->x_optimize
> 255)
552 opts
->x_optimize
= 255;
553 opts
->x_optimize_size
= 0;
554 opts
->x_optimize_fast
= 0;
560 opts
->x_optimize_size
= 1;
562 /* Optimizing for size forces optimize to be 2. */
563 opts
->x_optimize
= 2;
564 opts
->x_optimize_fast
= 0;
568 /* -Ofast only adds flags to -O3. */
569 opts
->x_optimize_size
= 0;
570 opts
->x_optimize
= 3;
571 opts
->x_optimize_fast
= 1;
575 /* Ignore other options in this prescan. */
580 maybe_default_options (opts
, opts_set
, default_options_table
,
581 opts
->x_optimize
, opts
->x_optimize_size
,
582 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
584 /* -O2 param settings. */
585 opt2
= (opts
->x_optimize
>= 2);
587 /* Track fields in field-sensitive alias analysis. */
588 maybe_set_param_value
589 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
590 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
591 opts
->x_param_values
, opts_set
->x_param_values
);
593 /* For -O1 only do loop invariant motion for very small loops. */
594 maybe_set_param_value
595 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
596 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
597 opts
->x_param_values
, opts_set
->x_param_values
);
599 if (opts
->x_optimize_size
)
600 /* We want to crossjump as much as possible. */
601 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
602 opts
->x_param_values
, opts_set
->x_param_values
);
604 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
605 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
606 opts
->x_param_values
, opts_set
->x_param_values
);
608 /* Allow default optimizations to be specified on a per-machine basis. */
609 maybe_default_options (opts
, opts_set
,
610 targetm_common
.option_optimization_table
,
611 opts
->x_optimize
, opts
->x_optimize_size
,
612 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
615 /* After all options at LOC have been read into OPTS and OPTS_SET,
616 finalize settings of those options and diagnose incompatible
619 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
622 enum unwind_info_type ui_except
;
624 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
626 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
627 OPTS->X_DUMP_DIR_NAME directory. Then try to make
628 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
629 directory, typically the directory to contain the object
631 if (opts
->x_dump_dir_name
)
632 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
633 opts
->x_dump_base_name
, NULL
);
634 else if (opts
->x_aux_base_name
635 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
637 const char *aux_base
;
639 base_of_path (opts
->x_aux_base_name
, &aux_base
);
640 if (opts
->x_aux_base_name
!= aux_base
)
642 int dir_len
= aux_base
- opts
->x_aux_base_name
;
643 char *new_dump_base_name
=
644 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
646 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
647 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
648 /* Append existing OPTS->X_DUMP_BASE_NAME. */
649 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
650 opts
->x_dump_base_name
= new_dump_base_name
;
655 /* Handle related options for unit-at-a-time, toplevel-reorder, and
657 if (!opts
->x_flag_unit_at_a_time
)
659 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
660 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
662 opts
->x_flag_section_anchors
= 0;
663 if (opts
->x_flag_toplevel_reorder
== 1)
664 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
666 opts
->x_flag_toplevel_reorder
= 0;
669 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
670 sorry ("transactional memory is not supported with non-call exceptions");
672 /* Unless the user has asked for section anchors, we disable toplevel
673 reordering at -O0 to disable transformations that might be surprising
674 to end users and to get -fno-toplevel-reorder tested. */
675 if (!opts
->x_optimize
676 && opts
->x_flag_toplevel_reorder
== 2
677 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
679 opts
->x_flag_toplevel_reorder
= 0;
680 opts
->x_flag_section_anchors
= 0;
682 if (!opts
->x_flag_toplevel_reorder
)
684 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
685 error_at (loc
, "section anchors must be disabled when toplevel reorder"
687 opts
->x_flag_section_anchors
= 0;
690 if (!opts
->x_flag_opts_finished
)
692 if (opts
->x_flag_pie
)
693 opts
->x_flag_pic
= opts
->x_flag_pie
;
694 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
695 opts
->x_flag_shlib
= 1;
696 opts
->x_flag_opts_finished
= true;
699 if (opts
->x_optimize
== 0)
701 /* Inlining does not work if not optimizing,
702 so force it not to be done. */
703 opts
->x_warn_inline
= 0;
704 opts
->x_flag_no_inline
= 1;
707 /* The optimization to partition hot and cold basic blocks into separate
708 sections of the .o and executable files does not work (currently)
709 with exception handling. This is because there is no support for
710 generating unwind info. If opts->x_flag_exceptions is turned on
711 we need to turn off the partitioning optimization. */
713 ui_except
= targetm_common
.except_unwind_info (opts
);
715 if (opts
->x_flag_exceptions
716 && opts
->x_flag_reorder_blocks_and_partition
717 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
720 "-freorder-blocks-and-partition does not work "
721 "with exceptions on this architecture");
722 opts
->x_flag_reorder_blocks_and_partition
= 0;
723 opts
->x_flag_reorder_blocks
= 1;
726 /* If user requested unwind info, then turn off the partitioning
729 if (opts
->x_flag_unwind_tables
730 && !targetm_common
.unwind_tables_default
731 && opts
->x_flag_reorder_blocks_and_partition
732 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
735 "-freorder-blocks-and-partition does not support "
736 "unwind info on this architecture");
737 opts
->x_flag_reorder_blocks_and_partition
= 0;
738 opts
->x_flag_reorder_blocks
= 1;
741 /* If the target requested unwind info, then turn off the partitioning
742 optimization with a different message. Likewise, if the target does not
743 support named sections. */
745 if (opts
->x_flag_reorder_blocks_and_partition
746 && (!targetm_common
.have_named_sections
747 || (opts
->x_flag_unwind_tables
748 && targetm_common
.unwind_tables_default
749 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
752 "-freorder-blocks-and-partition does not work "
753 "on this architecture");
754 opts
->x_flag_reorder_blocks_and_partition
= 0;
755 opts
->x_flag_reorder_blocks
= 1;
758 if (opts
->x_flag_reorder_blocks_and_partition
759 && !opts_set
->x_flag_reorder_functions
)
760 opts
->x_flag_reorder_functions
= 1;
762 /* Pipelining of outer loops is only possible when general pipelining
763 capabilities are requested. */
764 if (!opts
->x_flag_sel_sched_pipelining
)
765 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
767 if (opts
->x_flag_conserve_stack
)
769 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
770 opts
->x_param_values
, opts_set
->x_param_values
);
771 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
772 opts
->x_param_values
, opts_set
->x_param_values
);
775 if (opts
->x_flag_lto
)
778 opts
->x_flag_generate_lto
= 1;
780 /* When generating IL, do not operate in whole-program mode.
781 Otherwise, symbols will be privatized too early, causing link
783 opts
->x_flag_whole_program
= 0;
785 error_at (loc
, "LTO support has not been enabled in this configuration");
787 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
788 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
790 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
791 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
793 if ((opts
->x_flag_lto_partition_balanced
!= 0)
794 + (opts
->x_flag_lto_partition_1to1
!= 0)
795 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
796 error_at (loc
, "only one -flto-partition value can be specified");
799 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
800 default value if they choose based on other options. */
801 if (opts
->x_flag_split_stack
== -1)
802 opts
->x_flag_split_stack
= 0;
803 else if (opts
->x_flag_split_stack
)
805 if (!targetm_common
.supports_split_stack (true, opts
))
807 error_at (loc
, "%<-fsplit-stack%> is not supported by "
808 "this compiler configuration");
809 opts
->x_flag_split_stack
= 0;
813 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
815 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
816 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
817 opts
->x_param_values
, opts_set
->x_param_values
);
819 /* This replaces set_Wunused. */
820 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
821 if (opts
->x_warn_unused_parameter
== -1)
822 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
823 && opts
->x_extra_warnings
);
824 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
826 if (opts
->x_warn_unused_but_set_parameter
== -1)
827 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
828 && opts
->x_extra_warnings
);
829 /* Wunused-local-typedefs is enabled by -Wunused or -Wall. */
830 if (opts
->x_warn_unused_local_typedefs
== -1)
831 opts
->x_warn_unused_local_typedefs
= opts
->x_warn_unused
;
834 #define LEFT_COLUMN 27
836 /* Output ITEM, of length ITEM_WIDTH, in the left column,
837 followed by word-wrapped HELP in a second column. */
839 wrap_help (const char *help
,
841 unsigned int item_width
,
842 unsigned int columns
)
844 unsigned int col_width
= LEFT_COLUMN
;
845 unsigned int remaining
, room
, len
;
847 remaining
= strlen (help
);
851 room
= columns
- 3 - MAX (col_width
, item_width
);
860 for (i
= 0; help
[i
]; i
++)
862 if (i
>= room
&& len
!= remaining
)
866 else if ((help
[i
] == '-' || help
[i
] == '/')
867 && help
[i
+ 1] != ' '
868 && i
> 0 && ISALPHA (help
[i
- 1]))
873 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
875 while (help
[len
] == ' ')
883 /* Print help for a specific front-end, etc. */
885 print_filtered_help (unsigned int include_flags
,
886 unsigned int exclude_flags
,
887 unsigned int any_flags
,
888 unsigned int columns
,
889 struct gcc_options
*opts
,
890 unsigned int lang_mask
)
895 bool displayed
= false;
897 if (include_flags
== CL_PARAMS
)
899 for (i
= 0; i
< LAST_PARAM
; i
++)
901 const char *param
= compiler_params
[i
].option
;
903 help
= compiler_params
[i
].help
;
904 if (help
== NULL
|| *help
== '\0')
906 if (exclude_flags
& CL_UNDOCUMENTED
)
908 help
= undocumented_msg
;
911 /* Get the translation. */
914 wrap_help (help
, param
, strlen (param
), columns
);
920 if (!opts
->x_help_printed
)
921 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
923 if (!opts
->x_help_enum_printed
)
924 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
926 for (i
= 0; i
< cl_options_count
; i
++)
929 const struct cl_option
*option
= cl_options
+ i
;
934 if (include_flags
== 0
935 || ((option
->flags
& include_flags
) != include_flags
))
937 if ((option
->flags
& any_flags
) == 0)
941 /* Skip unwanted switches. */
942 if ((option
->flags
& exclude_flags
) != 0)
945 /* The driver currently prints its own help text. */
946 if ((option
->flags
& CL_DRIVER
) != 0
947 && (option
->flags
& (((1U << cl_lang_count
) - 1)
948 | CL_COMMON
| CL_TARGET
)) == 0)
952 /* Skip switches that have already been printed. */
953 if (opts
->x_help_printed
[i
])
956 opts
->x_help_printed
[i
] = true;
961 if (exclude_flags
& CL_UNDOCUMENTED
)
963 help
= undocumented_msg
;
966 /* Get the translation. */
969 /* Find the gap between the name of the
970 option and its descriptive text. */
971 tab
= strchr (help
, '\t');
980 opt
= option
->opt_text
;
984 /* With the -Q option enabled we change the descriptive text associated
985 with an option to be an indication of its current setting. */
986 if (!opts
->x_quiet_flag
)
988 void *flag_var
= option_flag_var (i
, opts
);
990 if (len
< (LEFT_COLUMN
+ 2))
991 strcpy (new_help
, "\t\t");
993 strcpy (new_help
, "\t");
996 && option
->var_type
!= CLVC_DEFER
)
998 if (option
->flags
& CL_JOINED
)
1000 if (option
->var_type
== CLVC_STRING
)
1002 if (* (const char **) flag_var
!= NULL
)
1003 snprintf (new_help
+ strlen (new_help
),
1004 sizeof (new_help
) - strlen (new_help
),
1005 * (const char **) flag_var
);
1007 else if (option
->var_type
== CLVC_ENUM
)
1009 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1011 const char *arg
= NULL
;
1013 value
= e
->get (flag_var
);
1014 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1016 arg
= _("[default]");
1017 snprintf (new_help
+ strlen (new_help
),
1018 sizeof (new_help
) - strlen (new_help
),
1022 sprintf (new_help
+ strlen (new_help
),
1023 "%#x", * (int *) flag_var
);
1026 strcat (new_help
, option_enabled (i
, opts
)
1027 ? _("[enabled]") : _("[disabled]"));
1033 wrap_help (help
, opt
, len
, columns
);
1036 if (option
->var_type
== CLVC_ENUM
1037 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1038 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1043 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1046 printf (_(" No options with the desired characteristics were found\n"));
1051 /* PR 31349: Tell the user how to see all of the
1052 options supported by a specific front end. */
1053 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1054 if ((1U << i
) & langs
)
1055 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1056 lang_names
[i
], lang_names
[i
]);
1060 else if (! displayed
)
1061 printf (_(" All options with the desired characteristics have already been displayed\n"));
1065 /* Print details of enumerated option arguments, if those
1066 enumerations have help text headings provided. If no help text
1067 is provided, presume that the possible values are listed in the
1068 help text for the relevant options. */
1069 for (i
= 0; i
< cl_enums_count
; i
++)
1071 unsigned int j
, pos
;
1073 if (opts
->x_help_enum_printed
[i
] != 1)
1075 if (cl_enums
[i
].help
== NULL
)
1077 printf (" %s\n ", _(cl_enums
[i
].help
));
1079 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1081 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1083 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1085 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1095 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1100 opts
->x_help_enum_printed
[i
] = 2;
1104 /* Display help for a specified type of option.
1105 The options must have ALL of the INCLUDE_FLAGS set
1106 ANY of the flags in the ANY_FLAGS set
1107 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1108 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1110 print_specific_help (unsigned int include_flags
,
1111 unsigned int exclude_flags
,
1112 unsigned int any_flags
,
1113 struct gcc_options
*opts
,
1114 unsigned int lang_mask
)
1116 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1117 const char * description
= NULL
;
1118 const char * descrip_extra
= "";
1122 /* Sanity check: Make sure that we do not have more
1123 languages than we have bits available to enumerate them. */
1124 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1126 /* If we have not done so already, obtain
1127 the desired maximum width of the output. */
1128 if (opts
->x_help_columns
== 0)
1132 p
= getenv ("COLUMNS");
1135 int value
= atoi (p
);
1138 opts
->x_help_columns
= value
;
1141 if (opts
->x_help_columns
== 0)
1142 /* Use a reasonable default. */
1143 opts
->x_help_columns
= 80;
1146 /* Decide upon the title for the options that we are going to display. */
1147 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1149 switch (flag
& include_flags
)
1156 description
= _("The following options are target specific");
1159 description
= _("The following options control compiler warning messages");
1161 case CL_OPTIMIZATION
:
1162 description
= _("The following options control optimizations");
1165 description
= _("The following options are language-independent");
1168 description
= _("The --param option recognizes the following as parameters");
1171 if (i
>= cl_lang_count
)
1173 if (exclude_flags
& all_langs_mask
)
1174 description
= _("The following options are specific to just the language ");
1176 description
= _("The following options are supported by the language ");
1177 descrip_extra
= lang_names
[i
];
1182 if (description
== NULL
)
1186 if (include_flags
& CL_UNDOCUMENTED
)
1187 description
= _("The following options are not documented");
1188 else if (include_flags
& CL_SEPARATE
)
1189 description
= _("The following options take separate arguments");
1190 else if (include_flags
& CL_JOINED
)
1191 description
= _("The following options take joined arguments");
1194 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1201 if (any_flags
& all_langs_mask
)
1202 description
= _("The following options are language-related");
1204 description
= _("The following options are language-independent");
1208 printf ("%s%s:\n", description
, descrip_extra
);
1209 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1210 opts
->x_help_columns
, opts
, lang_mask
);
1213 /* Handle target- and language-independent options. Return zero to
1214 generate an "unknown option" message. Only options that need
1215 extra handling need to be listed here; if you simply want
1216 DECODED->value assigned to a variable, it happens automatically. */
1219 common_handle_option (struct gcc_options
*opts
,
1220 struct gcc_options
*opts_set
,
1221 const struct cl_decoded_option
*decoded
,
1222 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1224 const struct cl_option_handlers
*handlers
,
1225 diagnostic_context
*dc
)
1227 size_t scode
= decoded
->opt_index
;
1228 const char *arg
= decoded
->arg
;
1229 int value
= decoded
->value
;
1230 enum opt_code code
= (enum opt_code
) scode
;
1232 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1237 handle_param (opts
, opts_set
, loc
, arg
);
1242 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1243 unsigned int undoc_mask
;
1246 if (lang_mask
== CL_DRIVER
)
1249 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1252 /* First display any single language specific options. */
1253 for (i
= 0; i
< cl_lang_count
; i
++)
1255 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1257 /* Next display any multi language specific options. */
1258 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1259 /* Then display any remaining, non-language options. */
1260 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1262 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1263 opts
->x_exit_after_options
= true;
1267 case OPT__target_help
:
1268 if (lang_mask
== CL_DRIVER
)
1271 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1272 opts
->x_exit_after_options
= true;
1277 const char * a
= arg
;
1278 unsigned int include_flags
= 0;
1279 /* Note - by default we include undocumented options when listing
1280 specific classes. If you only want to see documented options
1281 then add ",^undocumented" to the --help= option. E.g.:
1283 --help=target,^undocumented */
1284 unsigned int exclude_flags
= 0;
1286 if (lang_mask
== CL_DRIVER
)
1289 /* Walk along the argument string, parsing each word in turn.
1291 arg = [^]{word}[,{arg}]
1292 word = {optimizers|target|warnings|undocumented|
1293 params|common|<language>} */
1298 const char * string
;
1303 { "optimizers", CL_OPTIMIZATION
},
1304 { "target", CL_TARGET
},
1305 { "warnings", CL_WARNING
},
1306 { "undocumented", CL_UNDOCUMENTED
},
1307 { "params", CL_PARAMS
},
1308 { "joined", CL_JOINED
},
1309 { "separate", CL_SEPARATE
},
1310 { "common", CL_COMMON
},
1313 unsigned int * pflags
;
1315 unsigned int lang_flag
, specific_flag
;
1322 pflags
= & exclude_flags
;
1325 pflags
= & include_flags
;
1327 comma
= strchr (a
, ',');
1338 /* Check to see if the string matches an option class name. */
1339 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1340 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1342 specific_flag
= specifics
[i
].flag
;
1346 /* Check to see if the string matches a language name.
1347 Note - we rely upon the alpha-sorted nature of the entries in
1348 the lang_names array, specifically that shorter names appear
1349 before their longer variants. (i.e. C before C++). That way
1350 when we are attempting to match --help=c for example we will
1351 match with C first and not C++. */
1352 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1353 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1355 lang_flag
= 1U << i
;
1359 if (specific_flag
!= 0)
1362 * pflags
|= specific_flag
;
1365 /* The option's argument matches both the start of a
1366 language name and the start of an option class name.
1367 We have a special case for when the user has
1368 specified "--help=c", but otherwise we have to issue
1370 if (strncasecmp (a
, "c", len
) == 0)
1371 * pflags
|= lang_flag
;
1374 "--help argument %q.*s is ambiguous, "
1375 "please be more specific",
1379 else if (lang_flag
!= 0)
1380 * pflags
|= lang_flag
;
1383 "unrecognized argument to --help= option: %q.*s",
1392 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1394 opts
->x_exit_after_options
= true;
1399 if (lang_mask
== CL_DRIVER
)
1402 opts
->x_exit_after_options
= true;
1408 /* Currently handled in a prescan. */
1412 dc
->warning_as_error_requested
= value
;
1416 if (lang_mask
== CL_DRIVER
)
1419 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1420 opts
, opts_set
, loc
, dc
);
1423 case OPT_Wlarger_than_
:
1424 opts
->x_larger_than_size
= value
;
1425 opts
->x_warn_larger_than
= value
!= -1;
1428 case OPT_Wfatal_errors
:
1429 dc
->fatal_errors
= value
;
1432 case OPT_Wframe_larger_than_
:
1433 opts
->x_frame_larger_than_size
= value
;
1434 opts
->x_warn_frame_larger_than
= value
!= -1;
1437 case OPT_Wstack_usage_
:
1438 opts
->x_warn_stack_usage
= value
;
1439 opts
->x_flag_stack_usage_info
= value
!= -1;
1442 case OPT_Wstrict_aliasing
:
1443 set_Wstrict_aliasing (opts
, value
);
1446 case OPT_Wstrict_overflow
:
1447 opts
->x_warn_strict_overflow
= (value
1448 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1452 case OPT_Wsystem_headers
:
1453 dc
->dc_warn_system_headers
= value
;
1457 opts
->x_flag_gen_aux_info
= 1;
1460 case OPT_auxbase_strip
:
1462 char *tmp
= xstrdup (arg
);
1463 strip_off_ending (tmp
, strlen (tmp
));
1465 opts
->x_aux_base_name
= tmp
;
1470 decode_d_option (arg
, opts
, loc
, dc
);
1473 case OPT_fcall_used_
:
1474 case OPT_fcall_saved_
:
1479 case OPT_fdbg_cnt_list
:
1483 case OPT_fdebug_prefix_map_
:
1487 case OPT_fdiagnostics_show_location_
:
1488 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1491 case OPT_fdiagnostics_show_caret
:
1492 dc
->show_caret
= value
;
1495 case OPT_fdiagnostics_show_option
:
1496 dc
->show_option_requested
= value
;
1503 case OPT_ffast_math
:
1504 set_fast_math_flags (opts
, value
);
1507 case OPT_funsafe_math_optimizations
:
1508 set_unsafe_math_optimizations_flags (opts
, value
);
1515 case OPT_finline_limit_
:
1516 set_param_value ("max-inline-insns-single", value
/ 2,
1517 opts
->x_param_values
, opts_set
->x_param_values
);
1518 set_param_value ("max-inline-insns-auto", value
/ 2,
1519 opts
->x_param_values
, opts_set
->x_param_values
);
1522 case OPT_finstrument_functions_exclude_function_list_
:
1523 add_comma_separated_to_vector
1524 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1527 case OPT_finstrument_functions_exclude_file_list_
:
1528 add_comma_separated_to_vector
1529 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1532 case OPT_fmessage_length_
:
1533 pp_set_line_maximum_length (dc
->printer
, value
);
1534 diagnostic_set_caret_max_width (dc
, value
);
1537 case OPT_fpack_struct_
:
1538 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1540 "structure alignment must be a small power of two, not %d",
1543 opts
->x_initial_max_fld_align
= value
;
1547 case OPT_fplugin_arg_
:
1551 case OPT_fprofile_use_
:
1552 opts
->x_profile_data_prefix
= xstrdup (arg
);
1553 opts
->x_flag_profile_use
= true;
1555 /* No break here - do -fprofile-use processing. */
1556 case OPT_fprofile_use
:
1557 if (!opts_set
->x_flag_branch_probabilities
)
1558 opts
->x_flag_branch_probabilities
= value
;
1559 if (!opts_set
->x_flag_profile_values
)
1560 opts
->x_flag_profile_values
= value
;
1561 if (!opts_set
->x_flag_unroll_loops
)
1562 opts
->x_flag_unroll_loops
= value
;
1563 if (!opts_set
->x_flag_peel_loops
)
1564 opts
->x_flag_peel_loops
= value
;
1565 if (!opts_set
->x_flag_tracer
)
1566 opts
->x_flag_tracer
= value
;
1567 if (!opts_set
->x_flag_value_profile_transformations
)
1568 opts
->x_flag_value_profile_transformations
= value
;
1569 if (!opts_set
->x_flag_inline_functions
)
1570 opts
->x_flag_inline_functions
= value
;
1571 if (!opts_set
->x_flag_ipa_cp
)
1572 opts
->x_flag_ipa_cp
= value
;
1573 if (!opts_set
->x_flag_ipa_cp_clone
1574 && value
&& opts
->x_flag_ipa_cp
)
1575 opts
->x_flag_ipa_cp_clone
= value
;
1576 if (!opts_set
->x_flag_predictive_commoning
)
1577 opts
->x_flag_predictive_commoning
= value
;
1578 if (!opts_set
->x_flag_unswitch_loops
)
1579 opts
->x_flag_unswitch_loops
= value
;
1580 if (!opts_set
->x_flag_gcse_after_reload
)
1581 opts
->x_flag_gcse_after_reload
= value
;
1584 case OPT_fprofile_generate_
:
1585 opts
->x_profile_data_prefix
= xstrdup (arg
);
1587 /* No break here - do -fprofile-generate processing. */
1588 case OPT_fprofile_generate
:
1589 if (!opts_set
->x_profile_arc_flag
)
1590 opts
->x_profile_arc_flag
= value
;
1591 if (!opts_set
->x_flag_profile_values
)
1592 opts
->x_flag_profile_values
= value
;
1593 if (!opts_set
->x_flag_value_profile_transformations
)
1594 opts
->x_flag_value_profile_transformations
= value
;
1595 if (!opts_set
->x_flag_inline_functions
)
1596 opts
->x_flag_inline_functions
= value
;
1597 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1598 quadratic. Disable the pass until better memory representation
1600 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1601 opts
->x_flag_ipa_reference
= false;
1604 case OPT_fshow_column
:
1605 dc
->show_column
= value
;
1608 case OPT_frandom_seed
:
1609 /* The real switch is -fno-random-seed. */
1615 case OPT_frandom_seed_
:
1619 case OPT_fsched_verbose_
:
1620 #ifdef INSN_SCHEDULING
1621 /* Handled with Var in common.opt. */
1627 case OPT_fsched_stalled_insns_
:
1628 opts
->x_flag_sched_stalled_insns
= value
;
1629 if (opts
->x_flag_sched_stalled_insns
== 0)
1630 opts
->x_flag_sched_stalled_insns
= -1;
1633 case OPT_fsched_stalled_insns_dep_
:
1634 opts
->x_flag_sched_stalled_insns_dep
= value
;
1637 case OPT_fstack_check_
:
1638 if (!strcmp (arg
, "no"))
1639 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1640 else if (!strcmp (arg
, "generic"))
1641 /* This is the old stack checking method. */
1642 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1643 ? FULL_BUILTIN_STACK_CHECK
1644 : GENERIC_STACK_CHECK
;
1645 else if (!strcmp (arg
, "specific"))
1646 /* This is the new stack checking method. */
1647 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1648 ? FULL_BUILTIN_STACK_CHECK
1649 : STACK_CHECK_STATIC_BUILTIN
1650 ? STATIC_BUILTIN_STACK_CHECK
1651 : GENERIC_STACK_CHECK
;
1653 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1656 case OPT_fstack_limit
:
1657 /* The real switch is -fno-stack-limit. */
1663 case OPT_fstack_limit_register_
:
1664 case OPT_fstack_limit_symbol_
:
1668 case OPT_fstack_usage
:
1669 opts
->x_flag_stack_usage
= value
;
1670 opts
->x_flag_stack_usage_info
= value
!= 0;
1673 case OPT_ftree_vectorizer_verbose_
:
1674 vect_set_verbosity_level (opts
, value
);
1678 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1683 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1687 if (value
< 2 || value
> 4)
1688 error_at (loc
, "dwarf version %d is not supported", value
);
1690 opts
->x_dwarf_version
= value
;
1691 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1695 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1700 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1705 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1710 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1714 case OPT_pedantic_errors
:
1715 dc
->pedantic_errors
= 1;
1716 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1718 handlers
, opts
, opts_set
,
1723 opts
->x_flag_lto
= value
? "" : NULL
;
1727 dc
->dc_inhibit_warnings
= true;
1730 case OPT_fmax_errors_
:
1731 dc
->max_errors
= value
;
1734 case OPT_fuse_linker_plugin
:
1735 /* No-op. Used by the driver and passed to us because it starts with f.*/
1739 /* If the flag was handled in a standard way, assume the lack of
1740 processing here is intentional. */
1741 gcc_assert (option_flag_var (scode
, opts
));
1745 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
1750 /* Handle --param NAME=VALUE. */
1752 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1753 location_t loc
, const char *carg
)
1758 arg
= xstrdup (carg
);
1759 equal
= strchr (arg
, '=');
1761 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1765 value
= integral_argument (equal
+ 1);
1767 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1771 set_param_value (arg
, value
,
1772 opts
->x_param_values
, opts_set
->x_param_values
);
1779 /* Used to set the level of strict aliasing warnings in OPTS,
1780 when no level is specified (i.e., when -Wstrict-aliasing, and not
1781 -Wstrict-aliasing=level was given).
1782 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1783 and 0 otherwise. After calling this function, wstrict_aliasing will be
1784 set to the default value of -Wstrict_aliasing=level, currently 3. */
1786 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1788 gcc_assert (onoff
== 0 || onoff
== 1);
1790 opts
->x_warn_strict_aliasing
= 3;
1792 opts
->x_warn_strict_aliasing
= 0;
1795 /* The following routines are useful in setting all the flags that
1796 -ffast-math and -fno-fast-math imply. */
1798 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1800 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1802 opts
->x_flag_unsafe_math_optimizations
= set
;
1803 set_unsafe_math_optimizations_flags (opts
, set
);
1805 if (!opts
->frontend_set_flag_finite_math_only
)
1806 opts
->x_flag_finite_math_only
= set
;
1807 if (!opts
->frontend_set_flag_errno_math
)
1808 opts
->x_flag_errno_math
= !set
;
1811 if (!opts
->frontend_set_flag_signaling_nans
)
1812 opts
->x_flag_signaling_nans
= 0;
1813 if (!opts
->frontend_set_flag_rounding_math
)
1814 opts
->x_flag_rounding_math
= 0;
1815 if (!opts
->frontend_set_flag_cx_limited_range
)
1816 opts
->x_flag_cx_limited_range
= 1;
1820 /* When -funsafe-math-optimizations is set the following
1821 flags are set as well. */
1823 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1825 if (!opts
->frontend_set_flag_trapping_math
)
1826 opts
->x_flag_trapping_math
= !set
;
1827 if (!opts
->frontend_set_flag_signed_zeros
)
1828 opts
->x_flag_signed_zeros
= !set
;
1829 if (!opts
->frontend_set_flag_associative_math
)
1830 opts
->x_flag_associative_math
= set
;
1831 if (!opts
->frontend_set_flag_reciprocal_math
)
1832 opts
->x_flag_reciprocal_math
= set
;
1835 /* Return true iff flags in OPTS are set as if -ffast-math. */
1837 fast_math_flags_set_p (const struct gcc_options
*opts
)
1839 return (!opts
->x_flag_trapping_math
1840 && opts
->x_flag_unsafe_math_optimizations
1841 && opts
->x_flag_finite_math_only
1842 && !opts
->x_flag_signed_zeros
1843 && !opts
->x_flag_errno_math
);
1846 /* Return true iff flags are set as if -ffast-math but using the flags stored
1847 in the struct cl_optimization structure. */
1849 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1851 return (!opt
->x_flag_trapping_math
1852 && opt
->x_flag_unsafe_math_optimizations
1853 && opt
->x_flag_finite_math_only
1854 && !opt
->x_flag_signed_zeros
1855 && !opt
->x_flag_errno_math
);
1858 /* Handle a debug output -g switch for options OPTS
1859 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1860 explicitly), location LOC. EXTENDED is true or false to support
1861 extended output (2 is special and means "-ggdb" was given). */
1863 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1864 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1867 opts
->x_use_gnu_debug_info_extensions
= extended
;
1869 if (type
== NO_DEBUG
)
1871 if (opts
->x_write_symbols
== NO_DEBUG
)
1873 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1877 #ifdef DWARF2_DEBUGGING_INFO
1878 opts
->x_write_symbols
= DWARF2_DEBUG
;
1879 #elif defined DBX_DEBUGGING_INFO
1880 opts
->x_write_symbols
= DBX_DEBUG
;
1884 if (opts
->x_write_symbols
== NO_DEBUG
)
1885 warning_at (loc
, 0, "target system does not support debug output");
1890 /* Does it conflict with an already selected type? */
1891 if (opts_set
->x_write_symbols
!= NO_DEBUG
1892 && opts
->x_write_symbols
!= NO_DEBUG
1893 && type
!= opts
->x_write_symbols
)
1894 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1895 debug_type_names
[type
]);
1896 opts
->x_write_symbols
= type
;
1897 opts_set
->x_write_symbols
= type
;
1900 /* A debug flag without a level defaults to level 2. */
1903 if (!opts
->x_debug_info_level
)
1904 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1908 int argval
= integral_argument (arg
);
1910 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1911 else if (argval
> 3)
1912 error_at (loc
, "debug output level %s is too high", arg
);
1914 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1918 /* Arrange to dump core on error for diagnostic context DC. (The
1919 regular error message is still printed first, except in the case of
1923 setup_core_dumping (diagnostic_context
*dc
)
1926 signal (SIGABRT
, SIG_DFL
);
1928 #if defined(HAVE_SETRLIMIT)
1931 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1932 fatal_error ("getting core file size maximum limit: %m");
1933 rlim
.rlim_cur
= rlim
.rlim_max
;
1934 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1935 fatal_error ("setting core file size limit to maximum: %m");
1938 diagnostic_abort_on_error (dc
);
1941 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1942 diagnostic context DC. */
1945 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1946 location_t loc
, diagnostic_context
*dc
)
1954 opts
->x_flag_debug_asm
= 1;
1957 opts
->x_flag_print_asm_name
= 1;
1960 opts
->x_flag_dump_rtl_in_asm
= 1;
1961 opts
->x_flag_print_asm_name
= 1;
1964 opts
->x_graph_dump_format
= vcg
;
1967 opts
->x_rtl_dump_and_exit
= 1;
1969 case 'D': /* These are handled by the preprocessor. */
1976 setup_core_dumping (dc
);
1979 opts
->x_flag_dump_all_passed
= true;
1983 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1988 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1989 mask LANG_MASK, option handlers HANDLERS) as an error for option
1990 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1991 NULL), location LOC. This is used by -Werror=. */
1994 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1995 const struct cl_option_handlers
*handlers
,
1996 struct gcc_options
*opts
,
1997 struct gcc_options
*opts_set
,
1998 location_t loc
, diagnostic_context
*dc
)
2003 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2004 new_option
[0] = 'W';
2005 strcpy (new_option
+ 1, arg
);
2006 option_index
= find_opt (new_option
, lang_mask
);
2007 if (option_index
== OPT_SPECIAL_unknown
)
2009 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2013 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2015 control_warning_option (option_index
, (int) kind
, value
,
2017 handlers
, opts
, opts_set
, dc
);
2022 /* Return malloced memory for the name of the option OPTION_INDEX
2023 which enabled a diagnostic (context CONTEXT), originally of type
2024 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2028 option_name (diagnostic_context
*context
, int option_index
,
2029 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2033 /* A warning classified as an error. */
2034 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2035 && diag_kind
== DK_ERROR
)
2036 return concat (cl_options
[OPT_Werror_
].opt_text
,
2037 /* Skip over "-W". */
2038 cl_options
[option_index
].opt_text
+ 2,
2040 /* A warning with option. */
2042 return xstrdup (cl_options
[option_index
].opt_text
);
2044 /* A warning without option classified as an error. */
2045 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2046 || diag_kind
== DK_WARNING
)
2048 if (context
->warning_as_error_requested
)
2049 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2051 return xstrdup (_("enabled by default"));