1 /* Command line option handling.
2 Copyright (C) 2002-2013 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
27 #include "tm.h" /* For STACK_CHECK_BUILTIN,
28 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
29 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
32 #include "diagnostic.h"
33 #include "opts-diagnostic.h"
34 #include "insn-attr-common.h"
35 #include "common/common-target.h"
37 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
39 /* Indexed by enum debug_info_type. */
40 const char *const debug_type_names
[] =
42 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
45 /* Parse the -femit-struct-debug-detailed option value
46 and set the flag variables. */
48 #define MATCH( prefix, string ) \
49 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
50 ? ((string += sizeof prefix - 1), 1) : 0)
53 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
56 /* various labels for comparison */
57 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
58 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
59 static const char none_lbl
[] = "none", any_lbl
[] = "any";
60 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
62 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
63 /* Default is to apply to as much as possible. */
64 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
68 if (MATCH (dfn_lbl
, spec
))
69 usage
= DINFO_USAGE_DFN
;
70 else if (MATCH (dir_lbl
, spec
))
71 usage
= DINFO_USAGE_DIR_USE
;
72 else if (MATCH (ind_lbl
, spec
))
73 usage
= DINFO_USAGE_IND_USE
;
75 /* Generics or not? */
76 if (MATCH (ord_lbl
, spec
))
78 else if (MATCH (gen_lbl
, spec
))
81 /* What allowable environment? */
82 if (MATCH (none_lbl
, spec
))
83 files
= DINFO_STRUCT_FILE_NONE
;
84 else if (MATCH (any_lbl
, spec
))
85 files
= DINFO_STRUCT_FILE_ANY
;
86 else if (MATCH (sys_lbl
, spec
))
87 files
= DINFO_STRUCT_FILE_SYS
;
88 else if (MATCH (base_lbl
, spec
))
89 files
= DINFO_STRUCT_FILE_BASE
;
92 "argument %qs to %<-femit-struct-debug-detailed%> "
96 /* Effect the specification. */
97 if (usage
== DINFO_USAGE_NUM_ENUMS
)
101 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
103 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
107 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
109 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
115 opts
->x_debug_struct_ordinary
[usage
] = files
;
117 opts
->x_debug_struct_generic
[usage
] = files
;
121 set_struct_debug_option (opts
, loc
, spec
+1);
124 /* No more -femit-struct-debug-detailed specifications.
128 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
130 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
131 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
132 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
133 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
135 "%<-femit-struct-debug-detailed=dir:...%> must allow "
136 "at least as much as "
137 "%<-femit-struct-debug-detailed=ind:...%>");
141 /* Strip off a legitimate source ending from the input string NAME of
142 length LEN. Rather than having to know the names used by all of
143 our front ends, we strip off an ending of a period followed by
144 up to five characters. (Java uses ".class".) */
147 strip_off_ending (char *name
, int len
)
150 for (i
= 2; i
< 6 && len
> i
; i
++)
152 if (name
[len
- i
] == '.')
154 name
[len
- i
] = '\0';
160 /* Find the base name of a path, stripping off both directories and
161 a single final extension. */
163 base_of_path (const char *path
, const char **base_out
)
165 const char *base
= path
;
167 const char *p
= path
;
171 if (IS_DIR_SEPARATOR(c
))
186 /* What to print when a switch has no documentation. */
187 static const char undocumented_msg
[] = N_("This switch lacks documentation");
189 typedef char *char_p
; /* For DEF_VEC_P. */
191 static void handle_param (struct gcc_options
*opts
,
192 struct gcc_options
*opts_set
, location_t loc
,
194 static void set_debug_level (enum debug_info_type type
, int extended
,
195 const char *arg
, struct gcc_options
*opts
,
196 struct gcc_options
*opts_set
,
198 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
199 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
200 location_t loc
, diagnostic_context
*dc
);
201 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
203 static void enable_warning_as_error (const char *arg
, int value
,
204 unsigned int lang_mask
,
205 const struct cl_option_handlers
*handlers
,
206 struct gcc_options
*opts
,
207 struct gcc_options
*opts_set
,
209 diagnostic_context
*dc
);
211 /* Handle a back-end option; arguments and return value as for
215 target_handle_option (struct gcc_options
*opts
,
216 struct gcc_options
*opts_set
,
217 const struct cl_decoded_option
*decoded
,
218 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
220 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
221 diagnostic_context
*dc
)
223 gcc_assert (dc
== global_dc
);
224 gcc_assert (kind
== DK_UNSPECIFIED
);
225 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
228 /* Add comma-separated strings to a char_p vector. */
231 add_comma_separated_to_vector (void **pvec
, const char *arg
)
237 vec
<char_p
> *v
= (vec
<char_p
> *) *pvec
;
239 vec_check_alloc (v
, 1);
241 /* We never free this string. */
254 v
->safe_push (token_start
);
257 if (*r
== '\\' && r
[1] == ',')
265 if (*token_start
!= '\0')
266 v
->safe_push (token_start
);
271 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
274 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
276 size_t num_params
= get_num_compiler_params ();
278 *opts
= global_options_init
;
279 memset (opts_set
, 0, sizeof (*opts_set
));
281 opts
->x_param_values
= XNEWVEC (int, num_params
);
282 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
283 init_param_values (opts
->x_param_values
);
285 /* Initialize whether `char' is signed. */
286 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
287 /* Set this to a special "uninitialized" value. The actual default
288 is set after target options have been processed. */
289 opts
->x_flag_short_enums
= 2;
291 /* Initialize target_flags before default_options_optimization
292 so the latter can modify it. */
293 opts
->x_target_flags
= targetm_common
.default_target_flags
;
295 /* Some targets have ABI-specified unwind tables. */
296 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
298 /* Some targets have other target-specific initialization. */
299 targetm_common
.option_init_struct (opts
);
302 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
303 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
304 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
305 mask LANG_MASK and option handlers HANDLERS. */
308 maybe_default_option (struct gcc_options
*opts
,
309 struct gcc_options
*opts_set
,
310 const struct default_options
*default_opt
,
311 int level
, bool size
, bool fast
, bool debug
,
312 unsigned int lang_mask
,
313 const struct cl_option_handlers
*handlers
,
315 diagnostic_context
*dc
)
317 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
321 gcc_assert (level
== 2);
323 gcc_assert (level
== 3);
325 gcc_assert (level
== 1);
327 switch (default_opt
->levels
)
333 case OPT_LEVELS_0_ONLY
:
334 enabled
= (level
== 0);
337 case OPT_LEVELS_1_PLUS
:
338 enabled
= (level
>= 1);
341 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
342 enabled
= (level
>= 1 && !size
&& !debug
);
345 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
346 enabled
= (level
>= 1 && !debug
);
349 case OPT_LEVELS_2_PLUS
:
350 enabled
= (level
>= 2);
353 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
354 enabled
= (level
>= 2 && !size
&& !debug
);
357 case OPT_LEVELS_3_PLUS
:
358 enabled
= (level
>= 3);
361 case OPT_LEVELS_3_PLUS_AND_SIZE
:
362 enabled
= (level
>= 3 || size
);
365 case OPT_LEVELS_SIZE
:
369 case OPT_LEVELS_FAST
:
373 case OPT_LEVELS_NONE
:
379 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
380 default_opt
->arg
, default_opt
->value
,
381 lang_mask
, DK_UNSPECIFIED
, loc
,
383 else if (default_opt
->arg
== NULL
384 && !option
->cl_reject_negative
)
385 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
386 default_opt
->arg
, !default_opt
->value
,
387 lang_mask
, DK_UNSPECIFIED
, loc
,
391 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
392 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
393 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
394 language mask LANG_MASK and option handlers HANDLERS. */
397 maybe_default_options (struct gcc_options
*opts
,
398 struct gcc_options
*opts_set
,
399 const struct default_options
*default_opts
,
400 int level
, bool size
, bool fast
, bool debug
,
401 unsigned int lang_mask
,
402 const struct cl_option_handlers
*handlers
,
404 diagnostic_context
*dc
)
408 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
409 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
410 level
, size
, fast
, debug
,
411 lang_mask
, handlers
, loc
, dc
);
414 /* Table of options enabled by default at different levels. */
416 static const struct default_options default_options_table
[] =
418 /* -O1 optimizations. */
419 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
421 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
423 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
424 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
425 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
427 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
450 /* -O2 optimizations. */
451 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
452 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
453 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
454 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
455 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
456 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
457 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
463 #ifdef INSN_SCHEDULING
464 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
465 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, 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_NOT_DEBUG
, 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_fvect_cost_model
, NULL
, 1 },
499 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
500 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
502 /* -Ofast adds optimizations to -O3. */
503 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
505 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
508 /* Default the options in OPTS and OPTS_SET based on the optimization
509 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
511 default_options_optimization (struct gcc_options
*opts
,
512 struct gcc_options
*opts_set
,
513 struct cl_decoded_option
*decoded_options
,
514 unsigned int decoded_options_count
,
516 unsigned int lang_mask
,
517 const struct cl_option_handlers
*handlers
,
518 diagnostic_context
*dc
)
523 /* Scan to see what optimization level has been specified. That will
524 determine the default value of many flags. */
525 for (i
= 1; i
< decoded_options_count
; i
++)
527 struct cl_decoded_option
*opt
= &decoded_options
[i
];
528 switch (opt
->opt_index
)
531 if (*opt
->arg
== '\0')
533 opts
->x_optimize
= 1;
534 opts
->x_optimize_size
= 0;
535 opts
->x_optimize_fast
= 0;
536 opts
->x_optimize_debug
= 0;
540 const int optimize_val
= integral_argument (opt
->arg
);
541 if (optimize_val
== -1)
542 error_at (loc
, "argument to %<-O%> should be a non-negative "
543 "integer, %<g%>, %<s%> or %<fast%>");
546 opts
->x_optimize
= optimize_val
;
547 if ((unsigned int) opts
->x_optimize
> 255)
548 opts
->x_optimize
= 255;
549 opts
->x_optimize_size
= 0;
550 opts
->x_optimize_fast
= 0;
551 opts
->x_optimize_debug
= 0;
557 opts
->x_optimize_size
= 1;
559 /* Optimizing for size forces optimize to be 2. */
560 opts
->x_optimize
= 2;
561 opts
->x_optimize_fast
= 0;
562 opts
->x_optimize_debug
= 0;
566 /* -Ofast only adds flags to -O3. */
567 opts
->x_optimize_size
= 0;
568 opts
->x_optimize
= 3;
569 opts
->x_optimize_fast
= 1;
570 opts
->x_optimize_debug
= 0;
574 /* -Og selects optimization level 1. */
575 opts
->x_optimize_size
= 0;
576 opts
->x_optimize
= 1;
577 opts
->x_optimize_fast
= 0;
578 opts
->x_optimize_debug
= 1;
582 /* Ignore other options in this prescan. */
587 maybe_default_options (opts
, opts_set
, default_options_table
,
588 opts
->x_optimize
, opts
->x_optimize_size
,
589 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
590 lang_mask
, handlers
, loc
, dc
);
592 /* -O2 param settings. */
593 opt2
= (opts
->x_optimize
>= 2);
595 /* Track fields in field-sensitive alias analysis. */
596 maybe_set_param_value
597 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
598 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
599 opts
->x_param_values
, opts_set
->x_param_values
);
601 /* For -O1 only do loop invariant motion for very small loops. */
602 maybe_set_param_value
603 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
604 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
605 opts
->x_param_values
, opts_set
->x_param_values
);
607 if (opts
->x_optimize_size
)
608 /* We want to crossjump as much as possible. */
609 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
610 opts
->x_param_values
, opts_set
->x_param_values
);
612 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
613 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
614 opts
->x_param_values
, opts_set
->x_param_values
);
616 /* Allow default optimizations to be specified on a per-machine basis. */
617 maybe_default_options (opts
, opts_set
,
618 targetm_common
.option_optimization_table
,
619 opts
->x_optimize
, opts
->x_optimize_size
,
620 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
621 lang_mask
, handlers
, loc
, dc
);
624 /* After all options at LOC have been read into OPTS and OPTS_SET,
625 finalize settings of those options and diagnose incompatible
628 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
631 enum unwind_info_type ui_except
;
633 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
635 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
636 OPTS->X_DUMP_DIR_NAME directory. Then try to make
637 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
638 directory, typically the directory to contain the object
640 if (opts
->x_dump_dir_name
)
641 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
642 opts
->x_dump_base_name
, NULL
);
643 else if (opts
->x_aux_base_name
644 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
646 const char *aux_base
;
648 base_of_path (opts
->x_aux_base_name
, &aux_base
);
649 if (opts
->x_aux_base_name
!= aux_base
)
651 int dir_len
= aux_base
- opts
->x_aux_base_name
;
652 char *new_dump_base_name
=
653 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
655 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
656 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
657 /* Append existing OPTS->X_DUMP_BASE_NAME. */
658 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
659 opts
->x_dump_base_name
= new_dump_base_name
;
664 /* Handle related options for unit-at-a-time, toplevel-reorder, and
666 if (!opts
->x_flag_unit_at_a_time
)
668 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
669 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
671 opts
->x_flag_section_anchors
= 0;
672 if (opts
->x_flag_toplevel_reorder
== 1)
673 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
675 opts
->x_flag_toplevel_reorder
= 0;
678 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
679 sorry ("transactional memory is not supported with non-call exceptions");
681 /* Unless the user has asked for section anchors, we disable toplevel
682 reordering at -O0 to disable transformations that might be surprising
683 to end users and to get -fno-toplevel-reorder tested. */
684 if (!opts
->x_optimize
685 && opts
->x_flag_toplevel_reorder
== 2
686 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
688 opts
->x_flag_toplevel_reorder
= 0;
689 opts
->x_flag_section_anchors
= 0;
691 if (!opts
->x_flag_toplevel_reorder
)
693 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
694 error_at (loc
, "section anchors must be disabled when toplevel reorder"
696 opts
->x_flag_section_anchors
= 0;
699 if (!opts
->x_flag_opts_finished
)
701 if (opts
->x_flag_pie
)
702 opts
->x_flag_pic
= opts
->x_flag_pie
;
703 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
704 opts
->x_flag_shlib
= 1;
705 opts
->x_flag_opts_finished
= true;
708 if (opts
->x_optimize
== 0)
710 /* Inlining does not work if not optimizing,
711 so force it not to be done. */
712 opts
->x_warn_inline
= 0;
713 opts
->x_flag_no_inline
= 1;
716 /* The optimization to partition hot and cold basic blocks into separate
717 sections of the .o and executable files does not work (currently)
718 with exception handling. This is because there is no support for
719 generating unwind info. If opts->x_flag_exceptions is turned on
720 we need to turn off the partitioning optimization. */
722 ui_except
= targetm_common
.except_unwind_info (opts
);
724 if (opts
->x_flag_exceptions
725 && opts
->x_flag_reorder_blocks_and_partition
726 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
729 "-freorder-blocks-and-partition does not work "
730 "with exceptions on this architecture");
731 opts
->x_flag_reorder_blocks_and_partition
= 0;
732 opts
->x_flag_reorder_blocks
= 1;
735 /* If user requested unwind info, then turn off the partitioning
738 if (opts
->x_flag_unwind_tables
739 && !targetm_common
.unwind_tables_default
740 && opts
->x_flag_reorder_blocks_and_partition
741 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
744 "-freorder-blocks-and-partition does not support "
745 "unwind info on this architecture");
746 opts
->x_flag_reorder_blocks_and_partition
= 0;
747 opts
->x_flag_reorder_blocks
= 1;
750 /* If the target requested unwind info, then turn off the partitioning
751 optimization with a different message. Likewise, if the target does not
752 support named sections. */
754 if (opts
->x_flag_reorder_blocks_and_partition
755 && (!targetm_common
.have_named_sections
756 || (opts
->x_flag_unwind_tables
757 && targetm_common
.unwind_tables_default
758 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
761 "-freorder-blocks-and-partition does not work "
762 "on this architecture");
763 opts
->x_flag_reorder_blocks_and_partition
= 0;
764 opts
->x_flag_reorder_blocks
= 1;
767 if (opts
->x_flag_reorder_blocks_and_partition
768 && !opts_set
->x_flag_reorder_functions
)
769 opts
->x_flag_reorder_functions
= 1;
771 /* Pipelining of outer loops is only possible when general pipelining
772 capabilities are requested. */
773 if (!opts
->x_flag_sel_sched_pipelining
)
774 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
776 if (opts
->x_flag_conserve_stack
)
778 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
779 opts
->x_param_values
, opts_set
->x_param_values
);
780 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
781 opts
->x_param_values
, opts_set
->x_param_values
);
784 if (opts
->x_flag_lto
)
787 opts
->x_flag_generate_lto
= 1;
789 /* When generating IL, do not operate in whole-program mode.
790 Otherwise, symbols will be privatized too early, causing link
792 opts
->x_flag_whole_program
= 0;
794 error_at (loc
, "LTO support has not been enabled in this configuration");
796 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
797 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
799 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
800 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
802 if ((opts
->x_flag_lto_partition_balanced
!= 0)
803 + (opts
->x_flag_lto_partition_1to1
!= 0)
804 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
805 error_at (loc
, "only one -flto-partition value can be specified");
808 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
809 default value if they choose based on other options. */
810 if (opts
->x_flag_split_stack
== -1)
811 opts
->x_flag_split_stack
= 0;
812 else if (opts
->x_flag_split_stack
)
814 if (!targetm_common
.supports_split_stack (true, opts
))
816 error_at (loc
, "%<-fsplit-stack%> is not supported by "
817 "this compiler configuration");
818 opts
->x_flag_split_stack
= 0;
822 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
824 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
825 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
826 opts
->x_param_values
, opts_set
->x_param_values
);
828 /* The -gsplit-dwarf option requires -gpubnames. */
829 if (opts
->x_dwarf_split_debug_info
)
830 opts
->x_debug_generate_pub_sections
= 1;
833 #define LEFT_COLUMN 27
835 /* Output ITEM, of length ITEM_WIDTH, in the left column,
836 followed by word-wrapped HELP in a second column. */
838 wrap_help (const char *help
,
840 unsigned int item_width
,
841 unsigned int columns
)
843 unsigned int col_width
= LEFT_COLUMN
;
844 unsigned int remaining
, room
, len
;
846 remaining
= strlen (help
);
850 room
= columns
- 3 - MAX (col_width
, item_width
);
859 for (i
= 0; help
[i
]; i
++)
861 if (i
>= room
&& len
!= remaining
)
865 else if ((help
[i
] == '-' || help
[i
] == '/')
866 && help
[i
+ 1] != ' '
867 && i
> 0 && ISALPHA (help
[i
- 1]))
872 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
874 while (help
[len
] == ' ')
882 /* Print help for a specific front-end, etc. */
884 print_filtered_help (unsigned int include_flags
,
885 unsigned int exclude_flags
,
886 unsigned int any_flags
,
887 unsigned int columns
,
888 struct gcc_options
*opts
,
889 unsigned int lang_mask
)
894 bool displayed
= false;
896 if (include_flags
== CL_PARAMS
)
898 for (i
= 0; i
< LAST_PARAM
; i
++)
900 const char *param
= compiler_params
[i
].option
;
902 help
= compiler_params
[i
].help
;
903 if (help
== NULL
|| *help
== '\0')
905 if (exclude_flags
& CL_UNDOCUMENTED
)
907 help
= undocumented_msg
;
910 /* Get the translation. */
913 wrap_help (help
, param
, strlen (param
), columns
);
919 if (!opts
->x_help_printed
)
920 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
922 if (!opts
->x_help_enum_printed
)
923 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
925 for (i
= 0; i
< cl_options_count
; i
++)
928 const struct cl_option
*option
= cl_options
+ i
;
933 if (include_flags
== 0
934 || ((option
->flags
& include_flags
) != include_flags
))
936 if ((option
->flags
& any_flags
) == 0)
940 /* Skip unwanted switches. */
941 if ((option
->flags
& exclude_flags
) != 0)
944 /* The driver currently prints its own help text. */
945 if ((option
->flags
& CL_DRIVER
) != 0
946 && (option
->flags
& (((1U << cl_lang_count
) - 1)
947 | CL_COMMON
| CL_TARGET
)) == 0)
951 /* Skip switches that have already been printed. */
952 if (opts
->x_help_printed
[i
])
955 opts
->x_help_printed
[i
] = true;
960 if (exclude_flags
& CL_UNDOCUMENTED
)
962 help
= undocumented_msg
;
965 /* Get the translation. */
968 /* Find the gap between the name of the
969 option and its descriptive text. */
970 tab
= strchr (help
, '\t');
979 opt
= option
->opt_text
;
983 /* With the -Q option enabled we change the descriptive text associated
984 with an option to be an indication of its current setting. */
985 if (!opts
->x_quiet_flag
)
987 void *flag_var
= option_flag_var (i
, opts
);
989 if (len
< (LEFT_COLUMN
+ 2))
990 strcpy (new_help
, "\t\t");
992 strcpy (new_help
, "\t");
995 && option
->var_type
!= CLVC_DEFER
)
997 if (option
->flags
& CL_JOINED
)
999 if (option
->var_type
== CLVC_STRING
)
1001 if (* (const char **) flag_var
!= NULL
)
1002 snprintf (new_help
+ strlen (new_help
),
1003 sizeof (new_help
) - strlen (new_help
),
1004 * (const char **) flag_var
);
1006 else if (option
->var_type
== CLVC_ENUM
)
1008 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1010 const char *arg
= NULL
;
1012 value
= e
->get (flag_var
);
1013 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1015 arg
= _("[default]");
1016 snprintf (new_help
+ strlen (new_help
),
1017 sizeof (new_help
) - strlen (new_help
),
1021 sprintf (new_help
+ strlen (new_help
),
1022 "%#x", * (int *) flag_var
);
1025 strcat (new_help
, option_enabled (i
, opts
)
1026 ? _("[enabled]") : _("[disabled]"));
1032 wrap_help (help
, opt
, len
, columns
);
1035 if (option
->var_type
== CLVC_ENUM
1036 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1037 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1042 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1045 printf (_(" No options with the desired characteristics were found\n"));
1050 /* PR 31349: Tell the user how to see all of the
1051 options supported by a specific front end. */
1052 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1053 if ((1U << i
) & langs
)
1054 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1055 lang_names
[i
], lang_names
[i
]);
1059 else if (! displayed
)
1060 printf (_(" All options with the desired characteristics have already been displayed\n"));
1064 /* Print details of enumerated option arguments, if those
1065 enumerations have help text headings provided. If no help text
1066 is provided, presume that the possible values are listed in the
1067 help text for the relevant options. */
1068 for (i
= 0; i
< cl_enums_count
; i
++)
1070 unsigned int j
, pos
;
1072 if (opts
->x_help_enum_printed
[i
] != 1)
1074 if (cl_enums
[i
].help
== NULL
)
1076 printf (" %s\n ", _(cl_enums
[i
].help
));
1078 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1080 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1082 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1084 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1094 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1099 opts
->x_help_enum_printed
[i
] = 2;
1103 /* Display help for a specified type of option.
1104 The options must have ALL of the INCLUDE_FLAGS set
1105 ANY of the flags in the ANY_FLAGS set
1106 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1107 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1109 print_specific_help (unsigned int include_flags
,
1110 unsigned int exclude_flags
,
1111 unsigned int any_flags
,
1112 struct gcc_options
*opts
,
1113 unsigned int lang_mask
)
1115 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1116 const char * description
= NULL
;
1117 const char * descrip_extra
= "";
1121 /* Sanity check: Make sure that we do not have more
1122 languages than we have bits available to enumerate them. */
1123 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1125 /* If we have not done so already, obtain
1126 the desired maximum width of the output. */
1127 if (opts
->x_help_columns
== 0)
1131 p
= getenv ("COLUMNS");
1134 int value
= atoi (p
);
1137 opts
->x_help_columns
= value
;
1140 if (opts
->x_help_columns
== 0)
1141 /* Use a reasonable default. */
1142 opts
->x_help_columns
= 80;
1145 /* Decide upon the title for the options that we are going to display. */
1146 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1148 switch (flag
& include_flags
)
1155 description
= _("The following options are target specific");
1158 description
= _("The following options control compiler warning messages");
1160 case CL_OPTIMIZATION
:
1161 description
= _("The following options control optimizations");
1164 description
= _("The following options are language-independent");
1167 description
= _("The --param option recognizes the following as parameters");
1170 if (i
>= cl_lang_count
)
1172 if (exclude_flags
& all_langs_mask
)
1173 description
= _("The following options are specific to just the language ");
1175 description
= _("The following options are supported by the language ");
1176 descrip_extra
= lang_names
[i
];
1181 if (description
== NULL
)
1185 if (include_flags
& CL_UNDOCUMENTED
)
1186 description
= _("The following options are not documented");
1187 else if (include_flags
& CL_SEPARATE
)
1188 description
= _("The following options take separate arguments");
1189 else if (include_flags
& CL_JOINED
)
1190 description
= _("The following options take joined arguments");
1193 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1200 if (any_flags
& all_langs_mask
)
1201 description
= _("The following options are language-related");
1203 description
= _("The following options are language-independent");
1207 printf ("%s%s:\n", description
, descrip_extra
);
1208 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1209 opts
->x_help_columns
, opts
, lang_mask
);
1212 /* Handle target- and language-independent options. Return zero to
1213 generate an "unknown option" message. Only options that need
1214 extra handling need to be listed here; if you simply want
1215 DECODED->value assigned to a variable, it happens automatically. */
1218 common_handle_option (struct gcc_options
*opts
,
1219 struct gcc_options
*opts_set
,
1220 const struct cl_decoded_option
*decoded
,
1221 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1223 const struct cl_option_handlers
*handlers
,
1224 diagnostic_context
*dc
)
1226 size_t scode
= decoded
->opt_index
;
1227 const char *arg
= decoded
->arg
;
1228 int value
= decoded
->value
;
1229 enum opt_code code
= (enum opt_code
) scode
;
1231 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1236 handle_param (opts
, opts_set
, loc
, arg
);
1241 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1242 unsigned int undoc_mask
;
1245 if (lang_mask
== CL_DRIVER
)
1248 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1251 /* First display any single language specific options. */
1252 for (i
= 0; i
< cl_lang_count
; i
++)
1254 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1256 /* Next display any multi language specific options. */
1257 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1258 /* Then display any remaining, non-language options. */
1259 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1261 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1262 opts
->x_exit_after_options
= true;
1266 case OPT__target_help
:
1267 if (lang_mask
== CL_DRIVER
)
1270 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1271 opts
->x_exit_after_options
= true;
1276 const char * a
= arg
;
1277 unsigned int include_flags
= 0;
1278 /* Note - by default we include undocumented options when listing
1279 specific classes. If you only want to see documented options
1280 then add ",^undocumented" to the --help= option. E.g.:
1282 --help=target,^undocumented */
1283 unsigned int exclude_flags
= 0;
1285 if (lang_mask
== CL_DRIVER
)
1288 /* Walk along the argument string, parsing each word in turn.
1290 arg = [^]{word}[,{arg}]
1291 word = {optimizers|target|warnings|undocumented|
1292 params|common|<language>} */
1297 const char * string
;
1302 { "optimizers", CL_OPTIMIZATION
},
1303 { "target", CL_TARGET
},
1304 { "warnings", CL_WARNING
},
1305 { "undocumented", CL_UNDOCUMENTED
},
1306 { "params", CL_PARAMS
},
1307 { "joined", CL_JOINED
},
1308 { "separate", CL_SEPARATE
},
1309 { "common", CL_COMMON
},
1312 unsigned int * pflags
;
1314 unsigned int lang_flag
, specific_flag
;
1321 pflags
= & exclude_flags
;
1324 pflags
= & include_flags
;
1326 comma
= strchr (a
, ',');
1337 /* Check to see if the string matches an option class name. */
1338 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1339 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1341 specific_flag
= specifics
[i
].flag
;
1345 /* Check to see if the string matches a language name.
1346 Note - we rely upon the alpha-sorted nature of the entries in
1347 the lang_names array, specifically that shorter names appear
1348 before their longer variants. (i.e. C before C++). That way
1349 when we are attempting to match --help=c for example we will
1350 match with C first and not C++. */
1351 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1352 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1354 lang_flag
= 1U << i
;
1358 if (specific_flag
!= 0)
1361 * pflags
|= specific_flag
;
1364 /* The option's argument matches both the start of a
1365 language name and the start of an option class name.
1366 We have a special case for when the user has
1367 specified "--help=c", but otherwise we have to issue
1369 if (strncasecmp (a
, "c", len
) == 0)
1370 * pflags
|= lang_flag
;
1373 "--help argument %q.*s is ambiguous, "
1374 "please be more specific",
1378 else if (lang_flag
!= 0)
1379 * pflags
|= lang_flag
;
1382 "unrecognized argument to --help= option: %q.*s",
1391 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1393 opts
->x_exit_after_options
= true;
1398 if (lang_mask
== CL_DRIVER
)
1401 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
;
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_caret
:
1494 dc
->show_caret
= value
;
1497 case OPT_fdiagnostics_show_option
:
1498 dc
->show_option_requested
= value
;
1505 case OPT_ffast_math
:
1506 set_fast_math_flags (opts
, value
);
1509 case OPT_funsafe_math_optimizations
:
1510 set_unsafe_math_optimizations_flags (opts
, value
);
1517 case OPT_finline_limit_
:
1518 set_param_value ("max-inline-insns-single", value
/ 2,
1519 opts
->x_param_values
, opts_set
->x_param_values
);
1520 set_param_value ("max-inline-insns-auto", value
/ 2,
1521 opts
->x_param_values
, opts_set
->x_param_values
);
1524 case OPT_finstrument_functions_exclude_function_list_
:
1525 add_comma_separated_to_vector
1526 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1529 case OPT_finstrument_functions_exclude_file_list_
:
1530 add_comma_separated_to_vector
1531 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1534 case OPT_fmessage_length_
:
1535 pp_set_line_maximum_length (dc
->printer
, value
);
1536 diagnostic_set_caret_max_width (dc
, value
);
1540 case OPT_fopt_info_
:
1544 case OPT_fpack_struct_
:
1545 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1547 "structure alignment must be a small power of two, not %d",
1550 opts
->x_initial_max_fld_align
= value
;
1554 case OPT_fplugin_arg_
:
1558 case OPT_fprofile_use_
:
1559 opts
->x_profile_data_prefix
= xstrdup (arg
);
1560 opts
->x_flag_profile_use
= true;
1562 /* No break here - do -fprofile-use processing. */
1563 case OPT_fprofile_use
:
1564 if (!opts_set
->x_flag_branch_probabilities
)
1565 opts
->x_flag_branch_probabilities
= value
;
1566 if (!opts_set
->x_flag_profile_values
)
1567 opts
->x_flag_profile_values
= value
;
1568 if (!opts_set
->x_flag_unroll_loops
)
1569 opts
->x_flag_unroll_loops
= value
;
1570 if (!opts_set
->x_flag_peel_loops
)
1571 opts
->x_flag_peel_loops
= value
;
1572 if (!opts_set
->x_flag_tracer
)
1573 opts
->x_flag_tracer
= value
;
1574 if (!opts_set
->x_flag_value_profile_transformations
)
1575 opts
->x_flag_value_profile_transformations
= value
;
1576 if (!opts_set
->x_flag_inline_functions
)
1577 opts
->x_flag_inline_functions
= value
;
1578 if (!opts_set
->x_flag_ipa_cp
)
1579 opts
->x_flag_ipa_cp
= value
;
1580 if (!opts_set
->x_flag_ipa_cp_clone
1581 && value
&& opts
->x_flag_ipa_cp
)
1582 opts
->x_flag_ipa_cp_clone
= value
;
1583 if (!opts_set
->x_flag_predictive_commoning
)
1584 opts
->x_flag_predictive_commoning
= value
;
1585 if (!opts_set
->x_flag_unswitch_loops
)
1586 opts
->x_flag_unswitch_loops
= value
;
1587 if (!opts_set
->x_flag_gcse_after_reload
)
1588 opts
->x_flag_gcse_after_reload
= value
;
1589 if (!opts_set
->x_flag_tree_vectorize
)
1590 opts
->x_flag_tree_vectorize
= value
;
1591 if (!opts_set
->x_flag_vect_cost_model
)
1592 opts
->x_flag_vect_cost_model
= value
;
1593 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1594 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1597 case OPT_fprofile_generate_
:
1598 opts
->x_profile_data_prefix
= xstrdup (arg
);
1600 /* No break here - do -fprofile-generate processing. */
1601 case OPT_fprofile_generate
:
1602 if (!opts_set
->x_profile_arc_flag
)
1603 opts
->x_profile_arc_flag
= value
;
1604 if (!opts_set
->x_flag_profile_values
)
1605 opts
->x_flag_profile_values
= value
;
1606 if (!opts_set
->x_flag_inline_functions
)
1607 opts
->x_flag_inline_functions
= value
;
1608 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1609 quadratic. Disable the pass until better memory representation
1611 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1612 opts
->x_flag_ipa_reference
= false;
1615 case OPT_fshow_column
:
1616 dc
->show_column
= value
;
1619 case OPT_frandom_seed
:
1620 /* The real switch is -fno-random-seed. */
1626 case OPT_frandom_seed_
:
1630 case OPT_fsched_verbose_
:
1631 #ifdef INSN_SCHEDULING
1632 /* Handled with Var in common.opt. */
1638 case OPT_fsched_stalled_insns_
:
1639 opts
->x_flag_sched_stalled_insns
= value
;
1640 if (opts
->x_flag_sched_stalled_insns
== 0)
1641 opts
->x_flag_sched_stalled_insns
= -1;
1644 case OPT_fsched_stalled_insns_dep_
:
1645 opts
->x_flag_sched_stalled_insns_dep
= value
;
1648 case OPT_fstack_check_
:
1649 if (!strcmp (arg
, "no"))
1650 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1651 else if (!strcmp (arg
, "generic"))
1652 /* This is the old stack checking method. */
1653 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1654 ? FULL_BUILTIN_STACK_CHECK
1655 : GENERIC_STACK_CHECK
;
1656 else if (!strcmp (arg
, "specific"))
1657 /* This is the new stack checking method. */
1658 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1659 ? FULL_BUILTIN_STACK_CHECK
1660 : STACK_CHECK_STATIC_BUILTIN
1661 ? STATIC_BUILTIN_STACK_CHECK
1662 : GENERIC_STACK_CHECK
;
1664 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1667 case OPT_fstack_limit
:
1668 /* The real switch is -fno-stack-limit. */
1674 case OPT_fstack_limit_register_
:
1675 case OPT_fstack_limit_symbol_
:
1679 case OPT_fstack_usage
:
1680 opts
->x_flag_stack_usage
= value
;
1681 opts
->x_flag_stack_usage_info
= value
!= 0;
1684 case OPT_ftree_vectorizer_verbose_
:
1685 /* -ftree-vectorizer-verbose is deprecated. It is defined in
1686 -terms of fopt-info=N. */
1691 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1696 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1700 if (value
< 2 || value
> 4)
1701 error_at (loc
, "dwarf version %d is not supported", value
);
1703 opts
->x_dwarf_version
= value
;
1704 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1707 case OPT_gsplit_dwarf
:
1708 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
1713 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1718 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1723 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1728 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1732 case OPT_pedantic_errors
:
1733 dc
->pedantic_errors
= 1;
1734 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1736 handlers
, opts
, opts_set
,
1741 opts
->x_flag_lto
= value
? "" : NULL
;
1745 dc
->dc_inhibit_warnings
= true;
1748 case OPT_fmax_errors_
:
1749 dc
->max_errors
= value
;
1752 case OPT_fuse_ld_bfd
:
1753 case OPT_fuse_ld_gold
:
1754 case OPT_fuse_linker_plugin
:
1755 /* No-op. Used by the driver and passed to us because it starts with f.*/
1759 /* If the flag was handled in a standard way, assume the lack of
1760 processing here is intentional. */
1761 gcc_assert (option_flag_var (scode
, opts
));
1765 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
1770 /* Handle --param NAME=VALUE. */
1772 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1773 location_t loc
, const char *carg
)
1778 arg
= xstrdup (carg
);
1779 equal
= strchr (arg
, '=');
1781 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1785 value
= integral_argument (equal
+ 1);
1787 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1791 set_param_value (arg
, value
,
1792 opts
->x_param_values
, opts_set
->x_param_values
);
1799 /* Used to set the level of strict aliasing warnings in OPTS,
1800 when no level is specified (i.e., when -Wstrict-aliasing, and not
1801 -Wstrict-aliasing=level was given).
1802 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1803 and 0 otherwise. After calling this function, wstrict_aliasing will be
1804 set to the default value of -Wstrict_aliasing=level, currently 3. */
1806 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1808 gcc_assert (onoff
== 0 || onoff
== 1);
1810 opts
->x_warn_strict_aliasing
= 3;
1812 opts
->x_warn_strict_aliasing
= 0;
1815 /* The following routines are useful in setting all the flags that
1816 -ffast-math and -fno-fast-math imply. */
1818 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1820 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1822 opts
->x_flag_unsafe_math_optimizations
= set
;
1823 set_unsafe_math_optimizations_flags (opts
, set
);
1825 if (!opts
->frontend_set_flag_finite_math_only
)
1826 opts
->x_flag_finite_math_only
= set
;
1827 if (!opts
->frontend_set_flag_errno_math
)
1828 opts
->x_flag_errno_math
= !set
;
1831 if (!opts
->frontend_set_flag_signaling_nans
)
1832 opts
->x_flag_signaling_nans
= 0;
1833 if (!opts
->frontend_set_flag_rounding_math
)
1834 opts
->x_flag_rounding_math
= 0;
1835 if (!opts
->frontend_set_flag_cx_limited_range
)
1836 opts
->x_flag_cx_limited_range
= 1;
1840 /* When -funsafe-math-optimizations is set the following
1841 flags are set as well. */
1843 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1845 if (!opts
->frontend_set_flag_trapping_math
)
1846 opts
->x_flag_trapping_math
= !set
;
1847 if (!opts
->frontend_set_flag_signed_zeros
)
1848 opts
->x_flag_signed_zeros
= !set
;
1849 if (!opts
->frontend_set_flag_associative_math
)
1850 opts
->x_flag_associative_math
= set
;
1851 if (!opts
->frontend_set_flag_reciprocal_math
)
1852 opts
->x_flag_reciprocal_math
= set
;
1855 /* Return true iff flags in OPTS are set as if -ffast-math. */
1857 fast_math_flags_set_p (const struct gcc_options
*opts
)
1859 return (!opts
->x_flag_trapping_math
1860 && opts
->x_flag_unsafe_math_optimizations
1861 && opts
->x_flag_finite_math_only
1862 && !opts
->x_flag_signed_zeros
1863 && !opts
->x_flag_errno_math
);
1866 /* Return true iff flags are set as if -ffast-math but using the flags stored
1867 in the struct cl_optimization structure. */
1869 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1871 return (!opt
->x_flag_trapping_math
1872 && opt
->x_flag_unsafe_math_optimizations
1873 && opt
->x_flag_finite_math_only
1874 && !opt
->x_flag_signed_zeros
1875 && !opt
->x_flag_errno_math
);
1878 /* Handle a debug output -g switch for options OPTS
1879 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1880 explicitly), location LOC. EXTENDED is true or false to support
1881 extended output (2 is special and means "-ggdb" was given). */
1883 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1884 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1887 opts
->x_use_gnu_debug_info_extensions
= extended
;
1889 if (type
== NO_DEBUG
)
1891 if (opts
->x_write_symbols
== NO_DEBUG
)
1893 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1897 #ifdef DWARF2_DEBUGGING_INFO
1898 opts
->x_write_symbols
= DWARF2_DEBUG
;
1899 #elif defined DBX_DEBUGGING_INFO
1900 opts
->x_write_symbols
= DBX_DEBUG
;
1904 if (opts
->x_write_symbols
== NO_DEBUG
)
1905 warning_at (loc
, 0, "target system does not support debug output");
1910 /* Does it conflict with an already selected type? */
1911 if (opts_set
->x_write_symbols
!= NO_DEBUG
1912 && opts
->x_write_symbols
!= NO_DEBUG
1913 && type
!= opts
->x_write_symbols
)
1914 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1915 debug_type_names
[type
]);
1916 opts
->x_write_symbols
= type
;
1917 opts_set
->x_write_symbols
= type
;
1920 /* A debug flag without a level defaults to level 2. */
1923 if (!opts
->x_debug_info_level
)
1924 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1928 int argval
= integral_argument (arg
);
1930 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1931 else if (argval
> 3)
1932 error_at (loc
, "debug output level %s is too high", arg
);
1934 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1938 /* Arrange to dump core on error for diagnostic context DC. (The
1939 regular error message is still printed first, except in the case of
1943 setup_core_dumping (diagnostic_context
*dc
)
1946 signal (SIGABRT
, SIG_DFL
);
1948 #if defined(HAVE_SETRLIMIT)
1951 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1952 fatal_error ("getting core file size maximum limit: %m");
1953 rlim
.rlim_cur
= rlim
.rlim_max
;
1954 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1955 fatal_error ("setting core file size limit to maximum: %m");
1958 diagnostic_abort_on_error (dc
);
1961 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1962 diagnostic context DC. */
1965 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1966 location_t loc
, diagnostic_context
*dc
)
1974 opts
->x_flag_debug_asm
= 1;
1977 opts
->x_flag_print_asm_name
= 1;
1980 opts
->x_flag_dump_rtl_in_asm
= 1;
1981 opts
->x_flag_print_asm_name
= 1;
1984 opts
->x_rtl_dump_and_exit
= 1;
1986 case 'D': /* These are handled by the preprocessor. */
1993 setup_core_dumping (dc
);
1996 opts
->x_flag_dump_all_passed
= true;
2000 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2005 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2006 mask LANG_MASK, option handlers HANDLERS) as an error for option
2007 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2008 NULL), location LOC. This is used by -Werror=. */
2011 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2012 const struct cl_option_handlers
*handlers
,
2013 struct gcc_options
*opts
,
2014 struct gcc_options
*opts_set
,
2015 location_t loc
, diagnostic_context
*dc
)
2020 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2021 new_option
[0] = 'W';
2022 strcpy (new_option
+ 1, arg
);
2023 option_index
= find_opt (new_option
, lang_mask
);
2024 if (option_index
== OPT_SPECIAL_unknown
)
2026 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2030 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2032 control_warning_option (option_index
, (int) kind
, value
,
2034 handlers
, opts
, opts_set
, dc
);
2039 /* Return malloced memory for the name of the option OPTION_INDEX
2040 which enabled a diagnostic (context CONTEXT), originally of type
2041 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2045 option_name (diagnostic_context
*context
, int option_index
,
2046 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2050 /* A warning classified as an error. */
2051 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2052 && diag_kind
== DK_ERROR
)
2053 return concat (cl_options
[OPT_Werror_
].opt_text
,
2054 /* Skip over "-W". */
2055 cl_options
[option_index
].opt_text
+ 2,
2057 /* A warning with option. */
2059 return xstrdup (cl_options
[option_index
].opt_text
);
2061 /* A warning without option classified as an error. */
2062 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2063 || diag_kind
== DK_WARNING
)
2065 if (context
->warning_as_error_requested
)
2066 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2068 return xstrdup (_("enabled by default"));