1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
26 #include "tm.h" /* For STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
33 #include "diagnostic.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 /* Indexed by enum debug_info_type. */
39 const char *const debug_type_names
[] =
41 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
44 /* Parse the -femit-struct-debug-detailed option value
45 and set the flag variables. */
47 #define MATCH( prefix, string ) \
48 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
49 ? ((string += sizeof prefix - 1), 1) : 0)
52 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
55 /* various labels for comparison */
56 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
57 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
58 static const char none_lbl
[] = "none", any_lbl
[] = "any";
59 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
61 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
62 /* Default is to apply to as much as possible. */
63 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
67 if (MATCH (dfn_lbl
, spec
))
68 usage
= DINFO_USAGE_DFN
;
69 else if (MATCH (dir_lbl
, spec
))
70 usage
= DINFO_USAGE_DIR_USE
;
71 else if (MATCH (ind_lbl
, spec
))
72 usage
= DINFO_USAGE_IND_USE
;
74 /* Generics or not? */
75 if (MATCH (ord_lbl
, spec
))
77 else if (MATCH (gen_lbl
, spec
))
80 /* What allowable environment? */
81 if (MATCH (none_lbl
, spec
))
82 files
= DINFO_STRUCT_FILE_NONE
;
83 else if (MATCH (any_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_ANY
;
85 else if (MATCH (sys_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_SYS
;
87 else if (MATCH (base_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_BASE
;
91 "argument %qs to %<-femit-struct-debug-detailed%> "
95 /* Effect the specification. */
96 if (usage
== DINFO_USAGE_NUM_ENUMS
)
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
101 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
107 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
114 opts
->x_debug_struct_ordinary
[usage
] = files
;
116 opts
->x_debug_struct_generic
[usage
] = files
;
120 set_struct_debug_option (opts
, loc
, spec
+1);
123 /* No more -femit-struct-debug-detailed specifications.
127 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
129 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
130 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
131 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
132 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
134 "%<-femit-struct-debug-detailed=dir:...%> must allow "
135 "at least as much as "
136 "%<-femit-struct-debug-detailed=ind:...%>");
140 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
143 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
145 if (val
< MAX_VERBOSITY_LEVEL
)
146 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
148 opts
->x_user_vect_verbosity_level
149 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
153 /* Strip off a legitimate source ending from the input string NAME of
154 length LEN. Rather than having to know the names used by all of
155 our front ends, we strip off an ending of a period followed by
156 up to five characters. (Java uses ".class".) */
159 strip_off_ending (char *name
, int len
)
162 for (i
= 2; i
< 6 && len
> i
; i
++)
164 if (name
[len
- i
] == '.')
166 name
[len
- i
] = '\0';
172 /* Find the base name of a path, stripping off both directories and
173 a single final extension. */
175 base_of_path (const char *path
, const char **base_out
)
177 const char *base
= path
;
179 const char *p
= path
;
183 if (IS_DIR_SEPARATOR(c
))
198 /* What to print when a switch has no documentation. */
199 static const char undocumented_msg
[] = N_("This switch lacks documentation");
201 typedef char *char_p
; /* For DEF_VEC_P. */
203 DEF_VEC_ALLOC_P(char_p
,heap
);
205 static void handle_param (struct gcc_options
*opts
,
206 struct gcc_options
*opts_set
, location_t loc
,
208 static void set_debug_level (enum debug_info_type type
, int extended
,
209 const char *arg
, struct gcc_options
*opts
,
210 struct gcc_options
*opts_set
,
212 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
213 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
214 location_t loc
, diagnostic_context
*dc
);
215 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
217 static void enable_warning_as_error (const char *arg
, int value
,
218 unsigned int lang_mask
,
219 const struct cl_option_handlers
*handlers
,
220 struct gcc_options
*opts
,
221 struct gcc_options
*opts_set
,
223 diagnostic_context
*dc
);
225 /* Handle a back-end option; arguments and return value as for
229 target_handle_option (struct gcc_options
*opts
,
230 struct gcc_options
*opts_set
,
231 const struct cl_decoded_option
*decoded
,
232 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
234 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
235 diagnostic_context
*dc
)
237 gcc_assert (dc
== global_dc
);
238 gcc_assert (kind
== DK_UNSPECIFIED
);
239 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
242 /* Add comma-separated strings to a char_p vector. */
245 add_comma_separated_to_vector (void **pvec
, const char *arg
)
251 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
253 /* We never free this string. */
266 VEC_safe_push (char_p
, heap
, vec
, token_start
);
269 if (*r
== '\\' && r
[1] == ',')
277 if (*token_start
!= '\0')
278 VEC_safe_push (char_p
, heap
, vec
, token_start
);
283 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
286 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
288 size_t num_params
= get_num_compiler_params ();
290 *opts
= global_options_init
;
291 memset (opts_set
, 0, sizeof (*opts_set
));
293 opts
->x_param_values
= XNEWVEC (int, num_params
);
294 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
295 init_param_values (opts
->x_param_values
);
297 /* Initialize whether `char' is signed. */
298 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
299 /* Set this to a special "uninitialized" value. The actual default
300 is set after target options have been processed. */
301 opts
->x_flag_short_enums
= 2;
303 /* Initialize target_flags before default_options_optimization
304 so the latter can modify it. */
305 opts
->x_target_flags
= targetm_common
.default_target_flags
;
307 /* Some targets have ABI-specified unwind tables. */
308 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
310 /* Some targets have other target-specific initialization. */
311 targetm_common
.option_init_struct (opts
);
314 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
315 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
316 OPTS_SET, diagnostic context DC, location LOC, with language mask
317 LANG_MASK and option handlers HANDLERS. */
320 maybe_default_option (struct gcc_options
*opts
,
321 struct gcc_options
*opts_set
,
322 const struct default_options
*default_opt
,
323 int level
, bool size
, bool fast
,
324 unsigned int lang_mask
,
325 const struct cl_option_handlers
*handlers
,
327 diagnostic_context
*dc
)
329 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
333 gcc_assert (level
== 2);
335 gcc_assert (level
== 3);
337 switch (default_opt
->levels
)
343 case OPT_LEVELS_0_ONLY
:
344 enabled
= (level
== 0);
347 case OPT_LEVELS_1_PLUS
:
348 enabled
= (level
>= 1);
351 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
352 enabled
= (level
>= 1 && !size
);
355 case OPT_LEVELS_2_PLUS
:
356 enabled
= (level
>= 2);
359 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
360 enabled
= (level
>= 2 && !size
);
363 case OPT_LEVELS_3_PLUS
:
364 enabled
= (level
>= 3);
367 case OPT_LEVELS_3_PLUS_AND_SIZE
:
368 enabled
= (level
>= 3 || size
);
371 case OPT_LEVELS_SIZE
:
375 case OPT_LEVELS_FAST
:
379 case OPT_LEVELS_NONE
:
385 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
386 default_opt
->arg
, default_opt
->value
,
387 lang_mask
, DK_UNSPECIFIED
, loc
,
389 else if (default_opt
->arg
== NULL
390 && !option
->cl_reject_negative
)
391 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
392 default_opt
->arg
, !default_opt
->value
,
393 lang_mask
, DK_UNSPECIFIED
, loc
,
397 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
398 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
399 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
400 language mask LANG_MASK and option handlers HANDLERS. */
403 maybe_default_options (struct gcc_options
*opts
,
404 struct gcc_options
*opts_set
,
405 const struct default_options
*default_opts
,
406 int level
, bool size
, bool fast
,
407 unsigned int lang_mask
,
408 const struct cl_option_handlers
*handlers
,
410 diagnostic_context
*dc
)
414 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
415 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
416 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
419 /* Table of options enabled by default at different levels. */
421 static const struct default_options default_options_table
[] =
423 /* -O1 optimizations. */
424 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
453 /* -O2 optimizations. */
454 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
455 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
456 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
457 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
466 #ifdef INSN_SCHEDULING
467 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
468 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
488 /* -O3 optimizations. */
489 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
490 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
491 /* Inlining of functions reducing size is a good idea with -Os
492 regardless of them being declared inline. */
493 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
494 { OPT_LEVELS_1_PLUS
, OPT_finline_functions_called_once
, NULL
, 1 },
495 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
496 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
497 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
498 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
500 /* -Ofast adds optimizations to -O3. */
501 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
503 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
506 /* Default the options in OPTS and OPTS_SET based on the optimization
507 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
509 default_options_optimization (struct gcc_options
*opts
,
510 struct gcc_options
*opts_set
,
511 struct cl_decoded_option
*decoded_options
,
512 unsigned int decoded_options_count
,
514 unsigned int lang_mask
,
515 const struct cl_option_handlers
*handlers
,
516 diagnostic_context
*dc
)
521 /* Scan to see what optimization level has been specified. That will
522 determine the default value of many flags. */
523 for (i
= 1; i
< decoded_options_count
; i
++)
525 struct cl_decoded_option
*opt
= &decoded_options
[i
];
526 switch (opt
->opt_index
)
529 if (*opt
->arg
== '\0')
531 opts
->x_optimize
= 1;
532 opts
->x_optimize_size
= 0;
533 opts
->x_optimize_fast
= 0;
537 const int optimize_val
= integral_argument (opt
->arg
);
538 if (optimize_val
== -1)
540 "argument to %qs should be a non-negative integer",
544 opts
->x_optimize
= optimize_val
;
545 if ((unsigned int) opts
->x_optimize
> 255)
546 opts
->x_optimize
= 255;
547 opts
->x_optimize_size
= 0;
548 opts
->x_optimize_fast
= 0;
554 opts
->x_optimize_size
= 1;
556 /* Optimizing for size forces optimize to be 2. */
557 opts
->x_optimize
= 2;
558 opts
->x_optimize_fast
= 0;
562 /* -Ofast only adds flags to -O3. */
563 opts
->x_optimize_size
= 0;
564 opts
->x_optimize
= 3;
565 opts
->x_optimize_fast
= 1;
569 /* Ignore other options in this prescan. */
574 maybe_default_options (opts
, opts_set
, default_options_table
,
575 opts
->x_optimize
, opts
->x_optimize_size
,
576 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
578 /* -O2 param settings. */
579 opt2
= (opts
->x_optimize
>= 2);
581 /* Track fields in field-sensitive alias analysis. */
582 maybe_set_param_value
583 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
584 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
585 opts
->x_param_values
, opts_set
->x_param_values
);
587 /* For -O1 only do loop invariant motion for very small loops. */
588 maybe_set_param_value
589 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
590 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
591 opts
->x_param_values
, opts_set
->x_param_values
);
593 if (opts
->x_optimize_size
)
594 /* We want to crossjump as much as possible. */
595 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
596 opts
->x_param_values
, opts_set
->x_param_values
);
598 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
599 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
600 opts
->x_param_values
, opts_set
->x_param_values
);
602 /* Allow default optimizations to be specified on a per-machine basis. */
603 maybe_default_options (opts
, opts_set
,
604 targetm_common
.option_optimization_table
,
605 opts
->x_optimize
, opts
->x_optimize_size
,
606 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
609 /* After all options at LOC have been read into OPTS and OPTS_SET,
610 finalize settings of those options and diagnose incompatible
613 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
616 enum unwind_info_type ui_except
;
618 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
620 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
621 OPTS->X_DUMP_DIR_NAME directory. Then try to make
622 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
623 directory, typically the directory to contain the object
625 if (opts
->x_dump_dir_name
)
626 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
627 opts
->x_dump_base_name
, NULL
);
628 else if (opts
->x_aux_base_name
629 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
631 const char *aux_base
;
633 base_of_path (opts
->x_aux_base_name
, &aux_base
);
634 if (opts
->x_aux_base_name
!= aux_base
)
636 int dir_len
= aux_base
- opts
->x_aux_base_name
;
637 char *new_dump_base_name
=
638 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
640 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
641 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
642 /* Append existing OPTS->X_DUMP_BASE_NAME. */
643 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
644 opts
->x_dump_base_name
= new_dump_base_name
;
649 /* Handle related options for unit-at-a-time, toplevel-reorder, and
651 if (!opts
->x_flag_unit_at_a_time
)
653 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
654 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
656 opts
->x_flag_section_anchors
= 0;
657 if (opts
->x_flag_toplevel_reorder
== 1)
658 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
660 opts
->x_flag_toplevel_reorder
= 0;
663 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
664 if (opts
->x_warn_missing_noreturn
)
665 opts
->x_warn_suggest_attribute_noreturn
= true;
667 /* Unless the user has asked for section anchors, we disable toplevel
668 reordering at -O0 to disable transformations that might be surprising
669 to end users and to get -fno-toplevel-reorder tested. */
670 if (!opts
->x_optimize
671 && opts
->x_flag_toplevel_reorder
== 2
672 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
674 opts
->x_flag_toplevel_reorder
= 0;
675 opts
->x_flag_section_anchors
= 0;
677 if (!opts
->x_flag_toplevel_reorder
)
679 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
680 error_at (loc
, "section anchors must be disabled when toplevel reorder"
682 opts
->x_flag_section_anchors
= 0;
685 if (!opts
->x_flag_opts_finished
)
687 if (opts
->x_flag_pie
)
688 opts
->x_flag_pic
= opts
->x_flag_pie
;
689 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
690 opts
->x_flag_shlib
= 1;
691 opts
->x_flag_opts_finished
= true;
694 if (opts
->x_optimize
== 0)
696 /* Inlining does not work if not optimizing,
697 so force it not to be done. */
698 opts
->x_warn_inline
= 0;
699 opts
->x_flag_no_inline
= 1;
702 /* The optimization to partition hot and cold basic blocks into separate
703 sections of the .o and executable files does not work (currently)
704 with exception handling. This is because there is no support for
705 generating unwind info. If opts->x_flag_exceptions is turned on
706 we need to turn off the partitioning optimization. */
708 ui_except
= targetm_common
.except_unwind_info (opts
);
710 if (opts
->x_flag_exceptions
711 && opts
->x_flag_reorder_blocks_and_partition
712 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
715 "-freorder-blocks-and-partition does not work "
716 "with exceptions on this architecture");
717 opts
->x_flag_reorder_blocks_and_partition
= 0;
718 opts
->x_flag_reorder_blocks
= 1;
721 /* If user requested unwind info, then turn off the partitioning
724 if (opts
->x_flag_unwind_tables
725 && !targetm_common
.unwind_tables_default
726 && opts
->x_flag_reorder_blocks_and_partition
727 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
730 "-freorder-blocks-and-partition does not support "
731 "unwind info on this architecture");
732 opts
->x_flag_reorder_blocks_and_partition
= 0;
733 opts
->x_flag_reorder_blocks
= 1;
736 /* If the target requested unwind info, then turn off the partitioning
737 optimization with a different message. Likewise, if the target does not
738 support named sections. */
740 if (opts
->x_flag_reorder_blocks_and_partition
741 && (!targetm_common
.have_named_sections
742 || (opts
->x_flag_unwind_tables
743 && targetm_common
.unwind_tables_default
744 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
747 "-freorder-blocks-and-partition does not work "
748 "on this architecture");
749 opts
->x_flag_reorder_blocks_and_partition
= 0;
750 opts
->x_flag_reorder_blocks
= 1;
753 if (opts
->x_flag_reorder_blocks_and_partition
754 && !opts_set
->x_flag_reorder_functions
)
755 opts
->x_flag_reorder_functions
= 1;
757 /* Pipelining of outer loops is only possible when general pipelining
758 capabilities are requested. */
759 if (!opts
->x_flag_sel_sched_pipelining
)
760 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
762 if (opts
->x_flag_conserve_stack
)
764 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
765 opts
->x_param_values
, opts_set
->x_param_values
);
766 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
767 opts
->x_param_values
, opts_set
->x_param_values
);
770 if (opts
->x_flag_lto
)
773 opts
->x_flag_generate_lto
= 1;
775 /* When generating IL, do not operate in whole-program mode.
776 Otherwise, symbols will be privatized too early, causing link
778 opts
->x_flag_whole_program
= 0;
780 error_at (loc
, "LTO support has not been enabled in this configuration");
782 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
783 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
785 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
786 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
788 if ((opts
->x_flag_lto_partition_balanced
!= 0)
789 + (opts
->x_flag_lto_partition_1to1
!= 0)
790 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
791 error_at (loc
, "only one -flto-partition value can be specified");
794 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
795 default value if they choose based on other options. */
796 if (opts
->x_flag_split_stack
== -1)
797 opts
->x_flag_split_stack
= 0;
798 else if (opts
->x_flag_split_stack
)
800 if (!targetm_common
.supports_split_stack (true, opts
))
802 error_at (loc
, "%<-fsplit-stack%> is not supported by "
803 "this compiler configuration");
804 opts
->x_flag_split_stack
= 0;
808 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
810 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
811 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
812 opts
->x_param_values
, opts_set
->x_param_values
);
814 /* This replaces set_Wunused. */
815 if (opts
->x_warn_unused_function
== -1)
816 opts
->x_warn_unused_function
= opts
->x_warn_unused
;
817 if (opts
->x_warn_unused_label
== -1)
818 opts
->x_warn_unused_label
= opts
->x_warn_unused
;
819 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
820 if (opts
->x_warn_unused_parameter
== -1)
821 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
822 && opts
->x_extra_warnings
);
823 if (opts
->x_warn_unused_variable
== -1)
824 opts
->x_warn_unused_variable
= opts
->x_warn_unused
;
825 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
827 if (opts
->x_warn_unused_but_set_parameter
== -1)
828 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
829 && opts
->x_extra_warnings
);
830 if (opts
->x_warn_unused_but_set_variable
== -1)
831 opts
->x_warn_unused_but_set_variable
= opts
->x_warn_unused
;
832 if (opts
->x_warn_unused_value
== -1)
833 opts
->x_warn_unused_value
= opts
->x_warn_unused
;
835 /* This replaces set_Wextra. */
836 if (opts
->x_warn_uninitialized
== -1)
837 opts
->x_warn_uninitialized
= opts
->x_extra_warnings
;
840 #define LEFT_COLUMN 27
842 /* Output ITEM, of length ITEM_WIDTH, in the left column,
843 followed by word-wrapped HELP in a second column. */
845 wrap_help (const char *help
,
847 unsigned int item_width
,
848 unsigned int columns
)
850 unsigned int col_width
= LEFT_COLUMN
;
851 unsigned int remaining
, room
, len
;
853 remaining
= strlen (help
);
857 room
= columns
- 3 - MAX (col_width
, item_width
);
866 for (i
= 0; help
[i
]; i
++)
868 if (i
>= room
&& len
!= remaining
)
872 else if ((help
[i
] == '-' || help
[i
] == '/')
873 && help
[i
+ 1] != ' '
874 && i
> 0 && ISALPHA (help
[i
- 1]))
879 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
881 while (help
[len
] == ' ')
889 /* Print help for a specific front-end, etc. */
891 print_filtered_help (unsigned int include_flags
,
892 unsigned int exclude_flags
,
893 unsigned int any_flags
,
894 unsigned int columns
,
895 struct gcc_options
*opts
,
896 unsigned int lang_mask
)
901 bool displayed
= false;
903 if (include_flags
== CL_PARAMS
)
905 for (i
= 0; i
< LAST_PARAM
; i
++)
907 const char *param
= compiler_params
[i
].option
;
909 help
= compiler_params
[i
].help
;
910 if (help
== NULL
|| *help
== '\0')
912 if (exclude_flags
& CL_UNDOCUMENTED
)
914 help
= undocumented_msg
;
917 /* Get the translation. */
920 wrap_help (help
, param
, strlen (param
), columns
);
926 if (!opts
->x_help_printed
)
927 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
929 if (!opts
->x_help_enum_printed
)
930 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
932 for (i
= 0; i
< cl_options_count
; i
++)
935 const struct cl_option
*option
= cl_options
+ i
;
940 if (include_flags
== 0
941 || ((option
->flags
& include_flags
) != include_flags
))
943 if ((option
->flags
& any_flags
) == 0)
947 /* Skip unwanted switches. */
948 if ((option
->flags
& exclude_flags
) != 0)
951 /* The driver currently prints its own help text. */
952 if ((option
->flags
& CL_DRIVER
) != 0
953 && (option
->flags
& (((1U << cl_lang_count
) - 1)
954 | CL_COMMON
| CL_TARGET
)) == 0)
958 /* Skip switches that have already been printed. */
959 if (opts
->x_help_printed
[i
])
962 opts
->x_help_printed
[i
] = true;
967 if (exclude_flags
& CL_UNDOCUMENTED
)
969 help
= undocumented_msg
;
972 /* Get the translation. */
975 /* Find the gap between the name of the
976 option and its descriptive text. */
977 tab
= strchr (help
, '\t');
986 opt
= option
->opt_text
;
990 /* With the -Q option enabled we change the descriptive text associated
991 with an option to be an indication of its current setting. */
992 if (!opts
->x_quiet_flag
)
994 void *flag_var
= option_flag_var (i
, opts
);
996 if (len
< (LEFT_COLUMN
+ 2))
997 strcpy (new_help
, "\t\t");
999 strcpy (new_help
, "\t");
1001 if (flag_var
!= NULL
1002 && option
->var_type
!= CLVC_DEFER
)
1004 if (option
->flags
& CL_JOINED
)
1006 if (option
->var_type
== CLVC_STRING
)
1008 if (* (const char **) flag_var
!= NULL
)
1009 snprintf (new_help
+ strlen (new_help
),
1010 sizeof (new_help
) - strlen (new_help
),
1011 * (const char **) flag_var
);
1013 else if (option
->var_type
== CLVC_ENUM
)
1015 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1017 const char *arg
= NULL
;
1019 value
= e
->get (flag_var
);
1020 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1022 arg
= _("[default]");
1023 snprintf (new_help
+ strlen (new_help
),
1024 sizeof (new_help
) - strlen (new_help
),
1028 sprintf (new_help
+ strlen (new_help
),
1029 "%#x", * (int *) flag_var
);
1032 strcat (new_help
, option_enabled (i
, opts
)
1033 ? _("[enabled]") : _("[disabled]"));
1039 wrap_help (help
, opt
, len
, columns
);
1042 if (option
->var_type
== CLVC_ENUM
1043 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1044 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1049 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1052 printf (_(" No options with the desired characteristics were found\n"));
1057 /* PR 31349: Tell the user how to see all of the
1058 options supported by a specific front end. */
1059 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1060 if ((1U << i
) & langs
)
1061 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1062 lang_names
[i
], lang_names
[i
]);
1066 else if (! displayed
)
1067 printf (_(" All options with the desired characteristics have already been displayed\n"));
1071 /* Print details of enumerated option arguments, if those
1072 enumerations have help text headings provided. If no help text
1073 is provided, presume that the possible values are listed in the
1074 help text for the relevant options. */
1075 for (i
= 0; i
< cl_enums_count
; i
++)
1077 unsigned int j
, pos
;
1079 if (opts
->x_help_enum_printed
[i
] != 1)
1081 if (cl_enums
[i
].help
== NULL
)
1083 printf (" %s\n ", _(cl_enums
[i
].help
));
1085 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1087 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1089 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1091 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1101 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1106 opts
->x_help_enum_printed
[i
] = 2;
1110 /* Display help for a specified type of option.
1111 The options must have ALL of the INCLUDE_FLAGS set
1112 ANY of the flags in the ANY_FLAGS set
1113 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1114 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1116 print_specific_help (unsigned int include_flags
,
1117 unsigned int exclude_flags
,
1118 unsigned int any_flags
,
1119 struct gcc_options
*opts
,
1120 unsigned int lang_mask
)
1122 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1123 const char * description
= NULL
;
1124 const char * descrip_extra
= "";
1128 /* Sanity check: Make sure that we do not have more
1129 languages than we have bits available to enumerate them. */
1130 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1132 /* If we have not done so already, obtain
1133 the desired maximum width of the output. */
1134 if (opts
->x_help_columns
== 0)
1138 p
= getenv ("COLUMNS");
1141 int value
= atoi (p
);
1144 opts
->x_help_columns
= value
;
1147 if (opts
->x_help_columns
== 0)
1148 /* Use a reasonable default. */
1149 opts
->x_help_columns
= 80;
1152 /* Decide upon the title for the options that we are going to display. */
1153 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1155 switch (flag
& include_flags
)
1162 description
= _("The following options are target specific");
1165 description
= _("The following options control compiler warning messages");
1167 case CL_OPTIMIZATION
:
1168 description
= _("The following options control optimizations");
1171 description
= _("The following options are language-independent");
1174 description
= _("The --param option recognizes the following as parameters");
1177 if (i
>= cl_lang_count
)
1179 if (exclude_flags
& all_langs_mask
)
1180 description
= _("The following options are specific to just the language ");
1182 description
= _("The following options are supported by the language ");
1183 descrip_extra
= lang_names
[i
];
1188 if (description
== NULL
)
1192 if (include_flags
& CL_UNDOCUMENTED
)
1193 description
= _("The following options are not documented");
1194 else if (include_flags
& CL_SEPARATE
)
1195 description
= _("The following options take separate arguments");
1196 else if (include_flags
& CL_JOINED
)
1197 description
= _("The following options take joined arguments");
1200 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1207 if (any_flags
& all_langs_mask
)
1208 description
= _("The following options are language-related");
1210 description
= _("The following options are language-independent");
1214 printf ("%s%s:\n", description
, descrip_extra
);
1215 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1216 opts
->x_help_columns
, opts
, lang_mask
);
1219 /* Handle target- and language-independent options. Return zero to
1220 generate an "unknown option" message. Only options that need
1221 extra handling need to be listed here; if you simply want
1222 DECODED->value assigned to a variable, it happens automatically. */
1225 common_handle_option (struct gcc_options
*opts
,
1226 struct gcc_options
*opts_set
,
1227 const struct cl_decoded_option
*decoded
,
1228 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1230 const struct cl_option_handlers
*handlers
,
1231 diagnostic_context
*dc
)
1233 size_t scode
= decoded
->opt_index
;
1234 const char *arg
= decoded
->arg
;
1235 int value
= decoded
->value
;
1236 enum opt_code code
= (enum opt_code
) scode
;
1238 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1243 handle_param (opts
, opts_set
, loc
, arg
);
1248 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1249 unsigned int undoc_mask
;
1252 if (lang_mask
== CL_DRIVER
)
1255 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1258 /* First display any single language specific options. */
1259 for (i
= 0; i
< cl_lang_count
; i
++)
1261 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1263 /* Next display any multi language specific options. */
1264 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1265 /* Then display any remaining, non-language options. */
1266 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1268 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1269 opts
->x_exit_after_options
= true;
1273 case OPT__target_help
:
1274 if (lang_mask
== CL_DRIVER
)
1277 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1278 opts
->x_exit_after_options
= true;
1283 const char * a
= arg
;
1284 unsigned int include_flags
= 0;
1285 /* Note - by default we include undocumented options when listing
1286 specific classes. If you only want to see documented options
1287 then add ",^undocumented" to the --help= option. E.g.:
1289 --help=target,^undocumented */
1290 unsigned int exclude_flags
= 0;
1292 if (lang_mask
== CL_DRIVER
)
1295 /* Walk along the argument string, parsing each word in turn.
1297 arg = [^]{word}[,{arg}]
1298 word = {optimizers|target|warnings|undocumented|
1299 params|common|<language>} */
1304 const char * string
;
1309 { "optimizers", CL_OPTIMIZATION
},
1310 { "target", CL_TARGET
},
1311 { "warnings", CL_WARNING
},
1312 { "undocumented", CL_UNDOCUMENTED
},
1313 { "params", CL_PARAMS
},
1314 { "joined", CL_JOINED
},
1315 { "separate", CL_SEPARATE
},
1316 { "common", CL_COMMON
},
1319 unsigned int * pflags
;
1321 unsigned int lang_flag
, specific_flag
;
1328 pflags
= & exclude_flags
;
1331 pflags
= & include_flags
;
1333 comma
= strchr (a
, ',');
1344 /* Check to see if the string matches an option class name. */
1345 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1346 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1348 specific_flag
= specifics
[i
].flag
;
1352 /* Check to see if the string matches a language name.
1353 Note - we rely upon the alpha-sorted nature of the entries in
1354 the lang_names array, specifically that shorter names appear
1355 before their longer variants. (i.e. C before C++). That way
1356 when we are attempting to match --help=c for example we will
1357 match with C first and not C++. */
1358 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1359 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1361 lang_flag
= 1U << i
;
1365 if (specific_flag
!= 0)
1368 * pflags
|= specific_flag
;
1371 /* The option's argument matches both the start of a
1372 language name and the start of an option class name.
1373 We have a special case for when the user has
1374 specified "--help=c", but otherwise we have to issue
1376 if (strncasecmp (a
, "c", len
) == 0)
1377 * pflags
|= lang_flag
;
1380 "--help argument %q.*s is ambiguous, "
1381 "please be more specific",
1385 else if (lang_flag
!= 0)
1386 * pflags
|= lang_flag
;
1389 "unrecognized argument to --help= option: %q.*s",
1398 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1400 opts
->x_exit_after_options
= true;
1405 if (lang_mask
== CL_DRIVER
)
1408 opts
->x_exit_after_options
= true;
1414 /* Currently handled in a prescan. */
1418 if (lang_mask
== CL_DRIVER
)
1421 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1422 opts
, opts_set
, loc
, dc
);
1425 case OPT_Wlarger_than_
:
1426 opts
->x_larger_than_size
= value
;
1427 opts
->x_warn_larger_than
= value
!= -1;
1430 case OPT_Wfatal_errors
:
1431 dc
->fatal_errors
= value
;
1434 case OPT_Wframe_larger_than_
:
1435 opts
->x_frame_larger_than_size
= value
;
1436 opts
->x_warn_frame_larger_than
= value
!= -1;
1439 case OPT_Wstack_usage_
:
1440 opts
->x_warn_stack_usage
= value
;
1441 opts
->x_flag_stack_usage_info
= value
!= -1;
1444 case OPT_Wstrict_aliasing
:
1445 set_Wstrict_aliasing (opts
, value
);
1448 case OPT_Wstrict_overflow
:
1449 opts
->x_warn_strict_overflow
= (value
1450 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1454 case OPT_Wsystem_headers
:
1455 dc
->dc_warn_system_headers
= value
;
1459 opts
->x_flag_gen_aux_info
= 1;
1462 case OPT_auxbase_strip
:
1464 char *tmp
= xstrdup (arg
);
1465 strip_off_ending (tmp
, strlen (tmp
));
1467 opts
->x_aux_base_name
= tmp
;
1472 decode_d_option (arg
, opts
, loc
, dc
);
1475 case OPT_fcall_used_
:
1476 case OPT_fcall_saved_
:
1481 case OPT_fdbg_cnt_list
:
1485 case OPT_fdebug_prefix_map_
:
1489 case OPT_fdiagnostics_show_location_
:
1490 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1493 case OPT_fdiagnostics_show_option
:
1494 dc
->show_option_requested
= value
;
1501 case OPT_ffast_math
:
1502 set_fast_math_flags (opts
, value
);
1505 case OPT_funsafe_math_optimizations
:
1506 set_unsafe_math_optimizations_flags (opts
, value
);
1513 case OPT_finline_limit_
:
1514 set_param_value ("max-inline-insns-single", value
/ 2,
1515 opts
->x_param_values
, opts_set
->x_param_values
);
1516 set_param_value ("max-inline-insns-auto", value
/ 2,
1517 opts
->x_param_values
, opts_set
->x_param_values
);
1520 case OPT_finstrument_functions_exclude_function_list_
:
1521 add_comma_separated_to_vector
1522 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1525 case OPT_finstrument_functions_exclude_file_list_
:
1526 add_comma_separated_to_vector
1527 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1530 case OPT_fmessage_length_
:
1531 pp_set_line_maximum_length (dc
->printer
, value
);
1534 case OPT_fpack_struct_
:
1535 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1537 "structure alignment must be a small power of two, not %d",
1540 opts
->x_initial_max_fld_align
= value
;
1544 case OPT_fplugin_arg_
:
1548 case OPT_fprofile_use_
:
1549 opts
->x_profile_data_prefix
= xstrdup (arg
);
1550 opts
->x_flag_profile_use
= true;
1552 /* No break here - do -fprofile-use processing. */
1553 case OPT_fprofile_use
:
1554 if (!opts_set
->x_flag_branch_probabilities
)
1555 opts
->x_flag_branch_probabilities
= value
;
1556 if (!opts_set
->x_flag_profile_values
)
1557 opts
->x_flag_profile_values
= value
;
1558 if (!opts_set
->x_flag_unroll_loops
)
1559 opts
->x_flag_unroll_loops
= value
;
1560 if (!opts_set
->x_flag_peel_loops
)
1561 opts
->x_flag_peel_loops
= value
;
1562 if (!opts_set
->x_flag_tracer
)
1563 opts
->x_flag_tracer
= value
;
1564 if (!opts_set
->x_flag_value_profile_transformations
)
1565 opts
->x_flag_value_profile_transformations
= value
;
1566 if (!opts_set
->x_flag_inline_functions
)
1567 opts
->x_flag_inline_functions
= value
;
1568 if (!opts_set
->x_flag_ipa_cp
)
1569 opts
->x_flag_ipa_cp
= value
;
1570 if (!opts_set
->x_flag_ipa_cp_clone
1571 && value
&& opts
->x_flag_ipa_cp
)
1572 opts
->x_flag_ipa_cp_clone
= value
;
1573 if (!opts_set
->x_flag_predictive_commoning
)
1574 opts
->x_flag_predictive_commoning
= value
;
1575 if (!opts_set
->x_flag_unswitch_loops
)
1576 opts
->x_flag_unswitch_loops
= value
;
1577 if (!opts_set
->x_flag_gcse_after_reload
)
1578 opts
->x_flag_gcse_after_reload
= value
;
1581 case OPT_fprofile_generate_
:
1582 opts
->x_profile_data_prefix
= xstrdup (arg
);
1584 /* No break here - do -fprofile-generate processing. */
1585 case OPT_fprofile_generate
:
1586 if (!opts_set
->x_profile_arc_flag
)
1587 opts
->x_profile_arc_flag
= value
;
1588 if (!opts_set
->x_flag_profile_values
)
1589 opts
->x_flag_profile_values
= value
;
1590 if (!opts_set
->x_flag_value_profile_transformations
)
1591 opts
->x_flag_value_profile_transformations
= value
;
1592 if (!opts_set
->x_flag_inline_functions
)
1593 opts
->x_flag_inline_functions
= value
;
1594 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1595 quadratic. Disable the pass until better memory representation
1597 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1598 opts
->x_flag_ipa_reference
= false;
1601 case OPT_fshow_column
:
1602 dc
->show_column
= value
;
1605 case OPT_frandom_seed
:
1606 /* The real switch is -fno-random-seed. */
1612 case OPT_frandom_seed_
:
1616 case OPT_fsched_verbose_
:
1617 #ifdef INSN_SCHEDULING
1618 /* Handled with Var in common.opt. */
1624 case OPT_fsched_stalled_insns_
:
1625 opts
->x_flag_sched_stalled_insns
= value
;
1626 if (opts
->x_flag_sched_stalled_insns
== 0)
1627 opts
->x_flag_sched_stalled_insns
= -1;
1630 case OPT_fsched_stalled_insns_dep_
:
1631 opts
->x_flag_sched_stalled_insns_dep
= value
;
1634 case OPT_fstack_check_
:
1635 if (!strcmp (arg
, "no"))
1636 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1637 else if (!strcmp (arg
, "generic"))
1638 /* This is the old stack checking method. */
1639 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1640 ? FULL_BUILTIN_STACK_CHECK
1641 : GENERIC_STACK_CHECK
;
1642 else if (!strcmp (arg
, "specific"))
1643 /* This is the new stack checking method. */
1644 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1645 ? FULL_BUILTIN_STACK_CHECK
1646 : STACK_CHECK_STATIC_BUILTIN
1647 ? STATIC_BUILTIN_STACK_CHECK
1648 : GENERIC_STACK_CHECK
;
1650 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1653 case OPT_fstack_limit
:
1654 /* The real switch is -fno-stack-limit. */
1660 case OPT_fstack_limit_register_
:
1661 case OPT_fstack_limit_symbol_
:
1665 case OPT_fstack_usage
:
1666 opts
->x_flag_stack_usage
= value
;
1667 opts
->x_flag_stack_usage_info
= value
!= 0;
1670 case OPT_ftree_vectorizer_verbose_
:
1671 vect_set_verbosity_level (opts
, value
);
1675 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1680 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1684 if (value
< 2 || value
> 4)
1685 error_at (loc
, "dwarf version %d is not supported", value
);
1687 opts
->x_dwarf_version
= value
;
1688 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1692 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1697 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1702 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1707 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1711 case OPT_pedantic_errors
:
1712 opts
->x_pedantic
= 1;
1713 dc
->pedantic_errors
= 1;
1717 opts
->x_flag_lto
= value
? "" : NULL
;
1721 dc
->dc_inhibit_warnings
= true;
1724 case OPT_fmax_errors_
:
1725 dc
->max_errors
= value
;
1728 case OPT_fuse_linker_plugin
:
1729 /* No-op. Used by the driver and passed to us because it starts with f.*/
1732 case OPT_Wuninitialized
:
1733 /* Also turn on maybe uninitialized warning. */
1734 opts
->x_warn_maybe_uninitialized
= value
;
1738 /* If the flag was handled in a standard way, assume the lack of
1739 processing here is intentional. */
1740 gcc_assert (option_flag_var (scode
, opts
));
1747 /* Handle --param NAME=VALUE. */
1749 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1750 location_t loc
, const char *carg
)
1755 arg
= xstrdup (carg
);
1756 equal
= strchr (arg
, '=');
1758 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1762 value
= integral_argument (equal
+ 1);
1764 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1768 set_param_value (arg
, value
,
1769 opts
->x_param_values
, opts_set
->x_param_values
);
1776 /* Used to set the level of strict aliasing warnings in OPTS,
1777 when no level is specified (i.e., when -Wstrict-aliasing, and not
1778 -Wstrict-aliasing=level was given).
1779 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1780 and 0 otherwise. After calling this function, wstrict_aliasing will be
1781 set to the default value of -Wstrict_aliasing=level, currently 3. */
1783 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1785 gcc_assert (onoff
== 0 || onoff
== 1);
1787 opts
->x_warn_strict_aliasing
= 3;
1789 opts
->x_warn_strict_aliasing
= 0;
1792 /* The following routines are useful in setting all the flags that
1793 -ffast-math and -fno-fast-math imply. */
1795 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1797 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1799 opts
->x_flag_unsafe_math_optimizations
= set
;
1800 set_unsafe_math_optimizations_flags (opts
, set
);
1802 if (!opts
->frontend_set_flag_finite_math_only
)
1803 opts
->x_flag_finite_math_only
= set
;
1804 if (!opts
->frontend_set_flag_errno_math
)
1805 opts
->x_flag_errno_math
= !set
;
1808 if (!opts
->frontend_set_flag_signaling_nans
)
1809 opts
->x_flag_signaling_nans
= 0;
1810 if (!opts
->frontend_set_flag_rounding_math
)
1811 opts
->x_flag_rounding_math
= 0;
1812 if (!opts
->frontend_set_flag_cx_limited_range
)
1813 opts
->x_flag_cx_limited_range
= 1;
1817 /* When -funsafe-math-optimizations is set the following
1818 flags are set as well. */
1820 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1822 if (!opts
->frontend_set_flag_trapping_math
)
1823 opts
->x_flag_trapping_math
= !set
;
1824 if (!opts
->frontend_set_flag_signed_zeros
)
1825 opts
->x_flag_signed_zeros
= !set
;
1826 if (!opts
->frontend_set_flag_associative_math
)
1827 opts
->x_flag_associative_math
= set
;
1828 if (!opts
->frontend_set_flag_reciprocal_math
)
1829 opts
->x_flag_reciprocal_math
= set
;
1832 /* Return true iff flags in OPTS are set as if -ffast-math. */
1834 fast_math_flags_set_p (const struct gcc_options
*opts
)
1836 return (!opts
->x_flag_trapping_math
1837 && opts
->x_flag_unsafe_math_optimizations
1838 && opts
->x_flag_finite_math_only
1839 && !opts
->x_flag_signed_zeros
1840 && !opts
->x_flag_errno_math
);
1843 /* Return true iff flags are set as if -ffast-math but using the flags stored
1844 in the struct cl_optimization structure. */
1846 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1848 return (!opt
->x_flag_trapping_math
1849 && opt
->x_flag_unsafe_math_optimizations
1850 && opt
->x_flag_finite_math_only
1851 && !opt
->x_flag_signed_zeros
1852 && !opt
->x_flag_errno_math
);
1855 /* Handle a debug output -g switch for options OPTS
1856 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1857 explicitly), location LOC. EXTENDED is true or false to support
1858 extended output (2 is special and means "-ggdb" was given). */
1860 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1861 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1864 opts
->x_use_gnu_debug_info_extensions
= extended
;
1866 if (type
== NO_DEBUG
)
1868 if (opts
->x_write_symbols
== NO_DEBUG
)
1870 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1874 #ifdef DWARF2_DEBUGGING_INFO
1875 opts
->x_write_symbols
= DWARF2_DEBUG
;
1876 #elif defined DBX_DEBUGGING_INFO
1877 opts
->x_write_symbols
= DBX_DEBUG
;
1881 if (opts
->x_write_symbols
== NO_DEBUG
)
1882 warning_at (loc
, 0, "target system does not support debug output");
1887 /* Does it conflict with an already selected type? */
1888 if (opts_set
->x_write_symbols
!= NO_DEBUG
1889 && opts
->x_write_symbols
!= NO_DEBUG
1890 && type
!= opts
->x_write_symbols
)
1891 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1892 debug_type_names
[type
]);
1893 opts
->x_write_symbols
= type
;
1894 opts_set
->x_write_symbols
= type
;
1897 /* A debug flag without a level defaults to level 2. */
1900 if (!opts
->x_debug_info_level
)
1901 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1905 int argval
= integral_argument (arg
);
1907 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1908 else if (argval
> 3)
1909 error_at (loc
, "debug output level %s is too high", arg
);
1911 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1915 /* Arrange to dump core on error for diagnostic context DC. (The
1916 regular error message is still printed first, except in the case of
1920 setup_core_dumping (diagnostic_context
*dc
)
1923 signal (SIGABRT
, SIG_DFL
);
1925 #if defined(HAVE_SETRLIMIT)
1928 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1929 fatal_error ("getting core file size maximum limit: %m");
1930 rlim
.rlim_cur
= rlim
.rlim_max
;
1931 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1932 fatal_error ("setting core file size limit to maximum: %m");
1935 diagnostic_abort_on_error (dc
);
1938 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1939 diagnostic context DC. */
1942 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1943 location_t loc
, diagnostic_context
*dc
)
1951 opts
->x_flag_debug_asm
= 1;
1954 opts
->x_flag_print_asm_name
= 1;
1957 opts
->x_flag_dump_rtl_in_asm
= 1;
1958 opts
->x_flag_print_asm_name
= 1;
1961 opts
->x_graph_dump_format
= vcg
;
1964 opts
->x_rtl_dump_and_exit
= 1;
1966 case 'D': /* These are handled by the preprocessor. */
1973 setup_core_dumping (dc
);
1976 opts
->x_flag_dump_all_passed
= true;
1980 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1985 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1986 mask LANG_MASK, option handlers HANDLERS) as an error for option
1987 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1988 NULL), location LOC. This is used by -Werror=. */
1991 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1992 const struct cl_option_handlers
*handlers
,
1993 struct gcc_options
*opts
,
1994 struct gcc_options
*opts_set
,
1995 location_t loc
, diagnostic_context
*dc
)
2000 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2001 new_option
[0] = 'W';
2002 strcpy (new_option
+ 1, arg
);
2003 option_index
= find_opt (new_option
, lang_mask
);
2004 if (option_index
== OPT_SPECIAL_unknown
)
2006 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2010 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2012 control_warning_option (option_index
, (int) kind
, value
,
2014 handlers
, opts
, opts_set
, dc
);
2015 if (option_index
== OPT_Wuninitialized
)
2016 enable_warning_as_error ("maybe-uninitialized", value
, lang_mask
,
2017 handlers
, opts
, opts_set
, loc
, 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"));