1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
5 Free Software Foundation, Inc.
6 Contributed by Neil Booth.
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 3, or (at your option) any later
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING3. If not see
22 <http://www.gnu.org/licenses/>. */
27 #include "coretypes.h"
30 #include "tm.h" /* For STACK_CHECK_BUILTIN,
31 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
32 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
35 #include "diagnostic.h"
36 #include "opts-diagnostic.h"
37 #include "insn-attr-common.h"
38 #include "common/common-target.h"
40 static void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
42 /* Indexed by enum debug_info_type. */
43 const char *const debug_type_names
[] =
45 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
48 /* Parse the -femit-struct-debug-detailed option value
49 and set the flag variables. */
51 #define MATCH( prefix, string ) \
52 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
53 ? ((string += sizeof prefix - 1), 1) : 0)
56 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
59 /* various labels for comparison */
60 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
61 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
62 static const char none_lbl
[] = "none", any_lbl
[] = "any";
63 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
65 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
66 /* Default is to apply to as much as possible. */
67 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
71 if (MATCH (dfn_lbl
, spec
))
72 usage
= DINFO_USAGE_DFN
;
73 else if (MATCH (dir_lbl
, spec
))
74 usage
= DINFO_USAGE_DIR_USE
;
75 else if (MATCH (ind_lbl
, spec
))
76 usage
= DINFO_USAGE_IND_USE
;
78 /* Generics or not? */
79 if (MATCH (ord_lbl
, spec
))
81 else if (MATCH (gen_lbl
, spec
))
84 /* What allowable environment? */
85 if (MATCH (none_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_NONE
;
87 else if (MATCH (any_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_ANY
;
89 else if (MATCH (sys_lbl
, spec
))
90 files
= DINFO_STRUCT_FILE_SYS
;
91 else if (MATCH (base_lbl
, spec
))
92 files
= DINFO_STRUCT_FILE_BASE
;
95 "argument %qs to %<-femit-struct-debug-detailed%> "
99 /* Effect the specification. */
100 if (usage
== DINFO_USAGE_NUM_ENUMS
)
104 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
105 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
106 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
110 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
111 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
112 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
118 opts
->x_debug_struct_ordinary
[usage
] = files
;
120 opts
->x_debug_struct_generic
[usage
] = files
;
124 set_struct_debug_option (opts
, loc
, spec
+1);
127 /* No more -femit-struct-debug-detailed specifications.
131 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
133 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
134 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
135 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
136 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
138 "%<-femit-struct-debug-detailed=dir:...%> must allow "
139 "at least as much as "
140 "%<-femit-struct-debug-detailed=ind:...%>");
144 /* Strip off a legitimate source ending from the input string NAME of
145 length LEN. Rather than having to know the names used by all of
146 our front ends, we strip off an ending of a period followed by
147 up to five characters. (Java uses ".class".) */
150 strip_off_ending (char *name
, int len
)
153 for (i
= 2; i
< 6 && len
> i
; i
++)
155 if (name
[len
- i
] == '.')
157 name
[len
- i
] = '\0';
163 /* Find the base name of a path, stripping off both directories and
164 a single final extension. */
166 base_of_path (const char *path
, const char **base_out
)
168 const char *base
= path
;
170 const char *p
= path
;
174 if (IS_DIR_SEPARATOR(c
))
189 /* What to print when a switch has no documentation. */
190 static const char undocumented_msg
[] = N_("This switch lacks documentation");
192 typedef char *char_p
; /* For DEF_VEC_P. */
194 DEF_VEC_ALLOC_P(char_p
,heap
);
196 static void handle_param (struct gcc_options
*opts
,
197 struct gcc_options
*opts_set
, location_t loc
,
199 static void set_debug_level (enum debug_info_type type
, int extended
,
200 const char *arg
, struct gcc_options
*opts
,
201 struct gcc_options
*opts_set
,
203 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
204 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
205 location_t loc
, diagnostic_context
*dc
);
206 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
208 static void enable_warning_as_error (const char *arg
, int value
,
209 unsigned int lang_mask
,
210 const struct cl_option_handlers
*handlers
,
211 struct gcc_options
*opts
,
212 struct gcc_options
*opts_set
,
214 diagnostic_context
*dc
);
216 /* Handle a back-end option; arguments and return value as for
220 target_handle_option (struct gcc_options
*opts
,
221 struct gcc_options
*opts_set
,
222 const struct cl_decoded_option
*decoded
,
223 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
225 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
226 diagnostic_context
*dc
)
228 gcc_assert (dc
== global_dc
);
229 gcc_assert (kind
== DK_UNSPECIFIED
);
230 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
233 /* Add comma-separated strings to a char_p vector. */
236 add_comma_separated_to_vector (void **pvec
, const char *arg
)
242 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
244 /* We never free this string. */
257 VEC_safe_push (char_p
, heap
, vec
, token_start
);
260 if (*r
== '\\' && r
[1] == ',')
268 if (*token_start
!= '\0')
269 VEC_safe_push (char_p
, heap
, vec
, token_start
);
274 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
277 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
279 size_t num_params
= get_num_compiler_params ();
281 *opts
= global_options_init
;
282 memset (opts_set
, 0, sizeof (*opts_set
));
284 opts
->x_param_values
= XNEWVEC (int, num_params
);
285 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
286 init_param_values (opts
->x_param_values
);
288 /* Initialize whether `char' is signed. */
289 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
290 /* Set this to a special "uninitialized" value. The actual default
291 is set after target options have been processed. */
292 opts
->x_flag_short_enums
= 2;
294 /* Initialize target_flags before default_options_optimization
295 so the latter can modify it. */
296 opts
->x_target_flags
= targetm_common
.default_target_flags
;
298 /* Some targets have ABI-specified unwind tables. */
299 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
301 /* Some targets have other target-specific initialization. */
302 targetm_common
.option_init_struct (opts
);
305 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
306 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
307 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
308 mask LANG_MASK and option handlers HANDLERS. */
311 maybe_default_option (struct gcc_options
*opts
,
312 struct gcc_options
*opts_set
,
313 const struct default_options
*default_opt
,
314 int level
, bool size
, bool fast
, bool debug
,
315 unsigned int lang_mask
,
316 const struct cl_option_handlers
*handlers
,
318 diagnostic_context
*dc
)
320 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
324 gcc_assert (level
== 2);
326 gcc_assert (level
== 3);
328 gcc_assert (level
== 1);
330 switch (default_opt
->levels
)
336 case OPT_LEVELS_0_ONLY
:
337 enabled
= (level
== 0);
340 case OPT_LEVELS_1_PLUS
:
341 enabled
= (level
>= 1);
344 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
345 enabled
= (level
>= 1 && !size
&& !debug
);
348 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
349 enabled
= (level
>= 1 && !debug
);
352 case OPT_LEVELS_2_PLUS
:
353 enabled
= (level
>= 2);
356 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
357 enabled
= (level
>= 2 && !size
&& !debug
);
360 case OPT_LEVELS_3_PLUS
:
361 enabled
= (level
>= 3);
364 case OPT_LEVELS_3_PLUS_AND_SIZE
:
365 enabled
= (level
>= 3 || size
);
368 case OPT_LEVELS_SIZE
:
372 case OPT_LEVELS_FAST
:
376 case OPT_LEVELS_NONE
:
382 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
383 default_opt
->arg
, default_opt
->value
,
384 lang_mask
, DK_UNSPECIFIED
, loc
,
386 else if (default_opt
->arg
== NULL
387 && !option
->cl_reject_negative
)
388 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
389 default_opt
->arg
, !default_opt
->value
,
390 lang_mask
, DK_UNSPECIFIED
, loc
,
394 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
395 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
396 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
397 language mask LANG_MASK and option handlers HANDLERS. */
400 maybe_default_options (struct gcc_options
*opts
,
401 struct gcc_options
*opts_set
,
402 const struct default_options
*default_opts
,
403 int level
, bool size
, bool fast
, bool debug
,
404 unsigned int lang_mask
,
405 const struct cl_option_handlers
*handlers
,
407 diagnostic_context
*dc
)
411 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
412 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
413 level
, size
, fast
, debug
,
414 lang_mask
, handlers
, loc
, dc
);
417 /* Table of options enabled by default at different levels. */
419 static const struct default_options default_options_table
[] =
421 /* -O1 optimizations. */
422 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
424 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
427 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, 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 },
487 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
491 /* -O3 optimizations. */
492 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
493 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
494 /* Inlining of functions reducing size is a good idea with -Os
495 regardless of them being declared inline. */
496 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
497 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
498 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
499 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
500 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
501 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
503 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, NULL
, 1 },
505 /* -Ofast adds optimizations to -O3. */
506 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
508 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
511 /* Default the options in OPTS and OPTS_SET based on the optimization
512 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
514 default_options_optimization (struct gcc_options
*opts
,
515 struct gcc_options
*opts_set
,
516 struct cl_decoded_option
*decoded_options
,
517 unsigned int decoded_options_count
,
519 unsigned int lang_mask
,
520 const struct cl_option_handlers
*handlers
,
521 diagnostic_context
*dc
)
526 /* Scan to see what optimization level has been specified. That will
527 determine the default value of many flags. */
528 for (i
= 1; i
< decoded_options_count
; i
++)
530 struct cl_decoded_option
*opt
= &decoded_options
[i
];
531 switch (opt
->opt_index
)
534 if (*opt
->arg
== '\0')
536 opts
->x_optimize
= 1;
537 opts
->x_optimize_size
= 0;
538 opts
->x_optimize_fast
= 0;
539 opts
->x_optimize_debug
= 0;
543 const int optimize_val
= integral_argument (opt
->arg
);
544 if (optimize_val
== -1)
546 "argument to %qs should be a non-negative integer",
550 opts
->x_optimize
= optimize_val
;
551 if ((unsigned int) opts
->x_optimize
> 255)
552 opts
->x_optimize
= 255;
553 opts
->x_optimize_size
= 0;
554 opts
->x_optimize_fast
= 0;
555 opts
->x_optimize_debug
= 0;
561 opts
->x_optimize_size
= 1;
563 /* Optimizing for size forces optimize to be 2. */
564 opts
->x_optimize
= 2;
565 opts
->x_optimize_fast
= 0;
566 opts
->x_optimize_debug
= 0;
570 /* -Ofast only adds flags to -O3. */
571 opts
->x_optimize_size
= 0;
572 opts
->x_optimize
= 3;
573 opts
->x_optimize_fast
= 1;
574 opts
->x_optimize_debug
= 0;
578 /* -Og selects optimization level 1. */
579 opts
->x_optimize_size
= 0;
580 opts
->x_optimize
= 1;
581 opts
->x_optimize_fast
= 0;
582 opts
->x_optimize_debug
= 1;
586 /* Ignore other options in this prescan. */
591 maybe_default_options (opts
, opts_set
, default_options_table
,
592 opts
->x_optimize
, opts
->x_optimize_size
,
593 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
594 lang_mask
, handlers
, loc
, dc
);
596 /* -O2 param settings. */
597 opt2
= (opts
->x_optimize
>= 2);
599 /* Track fields in field-sensitive alias analysis. */
600 maybe_set_param_value
601 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
602 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
603 opts
->x_param_values
, opts_set
->x_param_values
);
605 /* For -O1 only do loop invariant motion for very small loops. */
606 maybe_set_param_value
607 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
608 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
609 opts
->x_param_values
, opts_set
->x_param_values
);
611 if (opts
->x_optimize_size
)
612 /* We want to crossjump as much as possible. */
613 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
614 opts
->x_param_values
, opts_set
->x_param_values
);
616 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
617 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
618 opts
->x_param_values
, opts_set
->x_param_values
);
620 /* Allow default optimizations to be specified on a per-machine basis. */
621 maybe_default_options (opts
, opts_set
,
622 targetm_common
.option_optimization_table
,
623 opts
->x_optimize
, opts
->x_optimize_size
,
624 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
625 lang_mask
, handlers
, loc
, dc
);
628 /* After all options at LOC have been read into OPTS and OPTS_SET,
629 finalize settings of those options and diagnose incompatible
632 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
635 enum unwind_info_type ui_except
;
637 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
639 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
640 OPTS->X_DUMP_DIR_NAME directory. Then try to make
641 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
642 directory, typically the directory to contain the object
644 if (opts
->x_dump_dir_name
)
645 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
646 opts
->x_dump_base_name
, NULL
);
647 else if (opts
->x_aux_base_name
648 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
650 const char *aux_base
;
652 base_of_path (opts
->x_aux_base_name
, &aux_base
);
653 if (opts
->x_aux_base_name
!= aux_base
)
655 int dir_len
= aux_base
- opts
->x_aux_base_name
;
656 char *new_dump_base_name
=
657 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
659 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
660 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
661 /* Append existing OPTS->X_DUMP_BASE_NAME. */
662 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
663 opts
->x_dump_base_name
= new_dump_base_name
;
668 /* Handle related options for unit-at-a-time, toplevel-reorder, and
670 if (!opts
->x_flag_unit_at_a_time
)
672 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
673 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
675 opts
->x_flag_section_anchors
= 0;
676 if (opts
->x_flag_toplevel_reorder
== 1)
677 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
679 opts
->x_flag_toplevel_reorder
= 0;
682 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
683 sorry ("transactional memory is not supported with non-call exceptions");
685 /* Unless the user has asked for section anchors, we disable toplevel
686 reordering at -O0 to disable transformations that might be surprising
687 to end users and to get -fno-toplevel-reorder tested. */
688 if (!opts
->x_optimize
689 && opts
->x_flag_toplevel_reorder
== 2
690 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
692 opts
->x_flag_toplevel_reorder
= 0;
693 opts
->x_flag_section_anchors
= 0;
695 if (!opts
->x_flag_toplevel_reorder
)
697 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
698 error_at (loc
, "section anchors must be disabled when toplevel reorder"
700 opts
->x_flag_section_anchors
= 0;
703 if (!opts
->x_flag_opts_finished
)
705 if (opts
->x_flag_pie
)
706 opts
->x_flag_pic
= opts
->x_flag_pie
;
707 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
708 opts
->x_flag_shlib
= 1;
709 opts
->x_flag_opts_finished
= true;
712 if (opts
->x_optimize
== 0)
714 /* Inlining does not work if not optimizing,
715 so force it not to be done. */
716 opts
->x_warn_inline
= 0;
717 opts
->x_flag_no_inline
= 1;
720 /* The optimization to partition hot and cold basic blocks into separate
721 sections of the .o and executable files does not work (currently)
722 with exception handling. This is because there is no support for
723 generating unwind info. If opts->x_flag_exceptions is turned on
724 we need to turn off the partitioning optimization. */
726 ui_except
= targetm_common
.except_unwind_info (opts
);
728 if (opts
->x_flag_exceptions
729 && opts
->x_flag_reorder_blocks_and_partition
730 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
733 "-freorder-blocks-and-partition does not work "
734 "with exceptions on this architecture");
735 opts
->x_flag_reorder_blocks_and_partition
= 0;
736 opts
->x_flag_reorder_blocks
= 1;
739 /* If user requested unwind info, then turn off the partitioning
742 if (opts
->x_flag_unwind_tables
743 && !targetm_common
.unwind_tables_default
744 && opts
->x_flag_reorder_blocks_and_partition
745 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
748 "-freorder-blocks-and-partition does not support "
749 "unwind info on this architecture");
750 opts
->x_flag_reorder_blocks_and_partition
= 0;
751 opts
->x_flag_reorder_blocks
= 1;
754 /* If the target requested unwind info, then turn off the partitioning
755 optimization with a different message. Likewise, if the target does not
756 support named sections. */
758 if (opts
->x_flag_reorder_blocks_and_partition
759 && (!targetm_common
.have_named_sections
760 || (opts
->x_flag_unwind_tables
761 && targetm_common
.unwind_tables_default
762 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
765 "-freorder-blocks-and-partition does not work "
766 "on this architecture");
767 opts
->x_flag_reorder_blocks_and_partition
= 0;
768 opts
->x_flag_reorder_blocks
= 1;
771 if (opts
->x_flag_reorder_blocks_and_partition
772 && !opts_set
->x_flag_reorder_functions
)
773 opts
->x_flag_reorder_functions
= 1;
775 /* Pipelining of outer loops is only possible when general pipelining
776 capabilities are requested. */
777 if (!opts
->x_flag_sel_sched_pipelining
)
778 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
780 if (opts
->x_flag_conserve_stack
)
782 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
783 opts
->x_param_values
, opts_set
->x_param_values
);
784 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
785 opts
->x_param_values
, opts_set
->x_param_values
);
788 if (opts
->x_flag_lto
)
791 opts
->x_flag_generate_lto
= 1;
793 /* When generating IL, do not operate in whole-program mode.
794 Otherwise, symbols will be privatized too early, causing link
796 opts
->x_flag_whole_program
= 0;
798 error_at (loc
, "LTO support has not been enabled in this configuration");
800 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
801 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
803 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
804 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
806 if ((opts
->x_flag_lto_partition_balanced
!= 0)
807 + (opts
->x_flag_lto_partition_1to1
!= 0)
808 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
809 error_at (loc
, "only one -flto-partition value can be specified");
812 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
813 default value if they choose based on other options. */
814 if (opts
->x_flag_split_stack
== -1)
815 opts
->x_flag_split_stack
= 0;
816 else if (opts
->x_flag_split_stack
)
818 if (!targetm_common
.supports_split_stack (true, opts
))
820 error_at (loc
, "%<-fsplit-stack%> is not supported by "
821 "this compiler configuration");
822 opts
->x_flag_split_stack
= 0;
826 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
828 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
829 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
830 opts
->x_param_values
, opts_set
->x_param_values
);
832 /* The -gsplit-dwarf option requires -gpubnames. */
833 if (opts
->x_dwarf_split_debug_info
)
834 opts
->x_debug_generate_pub_sections
= 1;
837 #define LEFT_COLUMN 27
839 /* Output ITEM, of length ITEM_WIDTH, in the left column,
840 followed by word-wrapped HELP in a second column. */
842 wrap_help (const char *help
,
844 unsigned int item_width
,
845 unsigned int columns
)
847 unsigned int col_width
= LEFT_COLUMN
;
848 unsigned int remaining
, room
, len
;
850 remaining
= strlen (help
);
854 room
= columns
- 3 - MAX (col_width
, item_width
);
863 for (i
= 0; help
[i
]; i
++)
865 if (i
>= room
&& len
!= remaining
)
869 else if ((help
[i
] == '-' || help
[i
] == '/')
870 && help
[i
+ 1] != ' '
871 && i
> 0 && ISALPHA (help
[i
- 1]))
876 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
878 while (help
[len
] == ' ')
886 /* Print help for a specific front-end, etc. */
888 print_filtered_help (unsigned int include_flags
,
889 unsigned int exclude_flags
,
890 unsigned int any_flags
,
891 unsigned int columns
,
892 struct gcc_options
*opts
,
893 unsigned int lang_mask
)
898 bool displayed
= false;
900 if (include_flags
== CL_PARAMS
)
902 for (i
= 0; i
< LAST_PARAM
; i
++)
904 const char *param
= compiler_params
[i
].option
;
906 help
= compiler_params
[i
].help
;
907 if (help
== NULL
|| *help
== '\0')
909 if (exclude_flags
& CL_UNDOCUMENTED
)
911 help
= undocumented_msg
;
914 /* Get the translation. */
917 wrap_help (help
, param
, strlen (param
), columns
);
923 if (!opts
->x_help_printed
)
924 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
926 if (!opts
->x_help_enum_printed
)
927 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
929 for (i
= 0; i
< cl_options_count
; i
++)
932 const struct cl_option
*option
= cl_options
+ i
;
937 if (include_flags
== 0
938 || ((option
->flags
& include_flags
) != include_flags
))
940 if ((option
->flags
& any_flags
) == 0)
944 /* Skip unwanted switches. */
945 if ((option
->flags
& exclude_flags
) != 0)
948 /* The driver currently prints its own help text. */
949 if ((option
->flags
& CL_DRIVER
) != 0
950 && (option
->flags
& (((1U << cl_lang_count
) - 1)
951 | CL_COMMON
| CL_TARGET
)) == 0)
955 /* Skip switches that have already been printed. */
956 if (opts
->x_help_printed
[i
])
959 opts
->x_help_printed
[i
] = true;
964 if (exclude_flags
& CL_UNDOCUMENTED
)
966 help
= undocumented_msg
;
969 /* Get the translation. */
972 /* Find the gap between the name of the
973 option and its descriptive text. */
974 tab
= strchr (help
, '\t');
983 opt
= option
->opt_text
;
987 /* With the -Q option enabled we change the descriptive text associated
988 with an option to be an indication of its current setting. */
989 if (!opts
->x_quiet_flag
)
991 void *flag_var
= option_flag_var (i
, opts
);
993 if (len
< (LEFT_COLUMN
+ 2))
994 strcpy (new_help
, "\t\t");
996 strcpy (new_help
, "\t");
999 && option
->var_type
!= CLVC_DEFER
)
1001 if (option
->flags
& CL_JOINED
)
1003 if (option
->var_type
== CLVC_STRING
)
1005 if (* (const char **) flag_var
!= NULL
)
1006 snprintf (new_help
+ strlen (new_help
),
1007 sizeof (new_help
) - strlen (new_help
),
1008 * (const char **) flag_var
);
1010 else if (option
->var_type
== CLVC_ENUM
)
1012 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1014 const char *arg
= NULL
;
1016 value
= e
->get (flag_var
);
1017 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1019 arg
= _("[default]");
1020 snprintf (new_help
+ strlen (new_help
),
1021 sizeof (new_help
) - strlen (new_help
),
1025 sprintf (new_help
+ strlen (new_help
),
1026 "%#x", * (int *) flag_var
);
1029 strcat (new_help
, option_enabled (i
, opts
)
1030 ? _("[enabled]") : _("[disabled]"));
1036 wrap_help (help
, opt
, len
, columns
);
1039 if (option
->var_type
== CLVC_ENUM
1040 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1041 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1046 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1049 printf (_(" No options with the desired characteristics were found\n"));
1054 /* PR 31349: Tell the user how to see all of the
1055 options supported by a specific front end. */
1056 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1057 if ((1U << i
) & langs
)
1058 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1059 lang_names
[i
], lang_names
[i
]);
1063 else if (! displayed
)
1064 printf (_(" All options with the desired characteristics have already been displayed\n"));
1068 /* Print details of enumerated option arguments, if those
1069 enumerations have help text headings provided. If no help text
1070 is provided, presume that the possible values are listed in the
1071 help text for the relevant options. */
1072 for (i
= 0; i
< cl_enums_count
; i
++)
1074 unsigned int j
, pos
;
1076 if (opts
->x_help_enum_printed
[i
] != 1)
1078 if (cl_enums
[i
].help
== NULL
)
1080 printf (" %s\n ", _(cl_enums
[i
].help
));
1082 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1084 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1086 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1088 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1098 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1103 opts
->x_help_enum_printed
[i
] = 2;
1107 /* Display help for a specified type of option.
1108 The options must have ALL of the INCLUDE_FLAGS set
1109 ANY of the flags in the ANY_FLAGS set
1110 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1111 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1113 print_specific_help (unsigned int include_flags
,
1114 unsigned int exclude_flags
,
1115 unsigned int any_flags
,
1116 struct gcc_options
*opts
,
1117 unsigned int lang_mask
)
1119 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1120 const char * description
= NULL
;
1121 const char * descrip_extra
= "";
1125 /* Sanity check: Make sure that we do not have more
1126 languages than we have bits available to enumerate them. */
1127 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1129 /* If we have not done so already, obtain
1130 the desired maximum width of the output. */
1131 if (opts
->x_help_columns
== 0)
1135 p
= getenv ("COLUMNS");
1138 int value
= atoi (p
);
1141 opts
->x_help_columns
= value
;
1144 if (opts
->x_help_columns
== 0)
1145 /* Use a reasonable default. */
1146 opts
->x_help_columns
= 80;
1149 /* Decide upon the title for the options that we are going to display. */
1150 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1152 switch (flag
& include_flags
)
1159 description
= _("The following options are target specific");
1162 description
= _("The following options control compiler warning messages");
1164 case CL_OPTIMIZATION
:
1165 description
= _("The following options control optimizations");
1168 description
= _("The following options are language-independent");
1171 description
= _("The --param option recognizes the following as parameters");
1174 if (i
>= cl_lang_count
)
1176 if (exclude_flags
& all_langs_mask
)
1177 description
= _("The following options are specific to just the language ");
1179 description
= _("The following options are supported by the language ");
1180 descrip_extra
= lang_names
[i
];
1185 if (description
== NULL
)
1189 if (include_flags
& CL_UNDOCUMENTED
)
1190 description
= _("The following options are not documented");
1191 else if (include_flags
& CL_SEPARATE
)
1192 description
= _("The following options take separate arguments");
1193 else if (include_flags
& CL_JOINED
)
1194 description
= _("The following options take joined arguments");
1197 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1204 if (any_flags
& all_langs_mask
)
1205 description
= _("The following options are language-related");
1207 description
= _("The following options are language-independent");
1211 printf ("%s%s:\n", description
, descrip_extra
);
1212 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1213 opts
->x_help_columns
, opts
, lang_mask
);
1216 /* Handle target- and language-independent options. Return zero to
1217 generate an "unknown option" message. Only options that need
1218 extra handling need to be listed here; if you simply want
1219 DECODED->value assigned to a variable, it happens automatically. */
1222 common_handle_option (struct gcc_options
*opts
,
1223 struct gcc_options
*opts_set
,
1224 const struct cl_decoded_option
*decoded
,
1225 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1227 const struct cl_option_handlers
*handlers
,
1228 diagnostic_context
*dc
)
1230 size_t scode
= decoded
->opt_index
;
1231 const char *arg
= decoded
->arg
;
1232 int value
= decoded
->value
;
1233 enum opt_code code
= (enum opt_code
) scode
;
1235 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1240 handle_param (opts
, opts_set
, loc
, arg
);
1245 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1246 unsigned int undoc_mask
;
1249 if (lang_mask
== CL_DRIVER
)
1252 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1255 /* First display any single language specific options. */
1256 for (i
= 0; i
< cl_lang_count
; i
++)
1258 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1260 /* Next display any multi language specific options. */
1261 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1262 /* Then display any remaining, non-language options. */
1263 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1265 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1266 opts
->x_exit_after_options
= true;
1270 case OPT__target_help
:
1271 if (lang_mask
== CL_DRIVER
)
1274 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1275 opts
->x_exit_after_options
= true;
1280 const char * a
= arg
;
1281 unsigned int include_flags
= 0;
1282 /* Note - by default we include undocumented options when listing
1283 specific classes. If you only want to see documented options
1284 then add ",^undocumented" to the --help= option. E.g.:
1286 --help=target,^undocumented */
1287 unsigned int exclude_flags
= 0;
1289 if (lang_mask
== CL_DRIVER
)
1292 /* Walk along the argument string, parsing each word in turn.
1294 arg = [^]{word}[,{arg}]
1295 word = {optimizers|target|warnings|undocumented|
1296 params|common|<language>} */
1301 const char * string
;
1306 { "optimizers", CL_OPTIMIZATION
},
1307 { "target", CL_TARGET
},
1308 { "warnings", CL_WARNING
},
1309 { "undocumented", CL_UNDOCUMENTED
},
1310 { "params", CL_PARAMS
},
1311 { "joined", CL_JOINED
},
1312 { "separate", CL_SEPARATE
},
1313 { "common", CL_COMMON
},
1316 unsigned int * pflags
;
1318 unsigned int lang_flag
, specific_flag
;
1325 pflags
= & exclude_flags
;
1328 pflags
= & include_flags
;
1330 comma
= strchr (a
, ',');
1341 /* Check to see if the string matches an option class name. */
1342 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1343 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1345 specific_flag
= specifics
[i
].flag
;
1349 /* Check to see if the string matches a language name.
1350 Note - we rely upon the alpha-sorted nature of the entries in
1351 the lang_names array, specifically that shorter names appear
1352 before their longer variants. (i.e. C before C++). That way
1353 when we are attempting to match --help=c for example we will
1354 match with C first and not C++. */
1355 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1356 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1358 lang_flag
= 1U << i
;
1362 if (specific_flag
!= 0)
1365 * pflags
|= specific_flag
;
1368 /* The option's argument matches both the start of a
1369 language name and the start of an option class name.
1370 We have a special case for when the user has
1371 specified "--help=c", but otherwise we have to issue
1373 if (strncasecmp (a
, "c", len
) == 0)
1374 * pflags
|= lang_flag
;
1377 "--help argument %q.*s is ambiguous, "
1378 "please be more specific",
1382 else if (lang_flag
!= 0)
1383 * pflags
|= lang_flag
;
1386 "unrecognized argument to --help= option: %q.*s",
1395 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1397 opts
->x_exit_after_options
= true;
1402 if (lang_mask
== CL_DRIVER
)
1405 opts
->x_exit_after_options
= true;
1412 /* Currently handled in a prescan. */
1416 dc
->warning_as_error_requested
= value
;
1420 if (lang_mask
== CL_DRIVER
)
1423 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1424 opts
, opts_set
, loc
, dc
);
1427 case OPT_Wlarger_than_
:
1428 opts
->x_larger_than_size
= value
;
1429 opts
->x_warn_larger_than
= value
!= -1;
1432 case OPT_Wfatal_errors
:
1433 dc
->fatal_errors
= value
;
1436 case OPT_Wframe_larger_than_
:
1437 opts
->x_frame_larger_than_size
= value
;
1438 opts
->x_warn_frame_larger_than
= value
!= -1;
1441 case OPT_Wstack_usage_
:
1442 opts
->x_warn_stack_usage
= value
;
1443 opts
->x_flag_stack_usage_info
= value
!= -1;
1446 case OPT_Wstrict_aliasing
:
1447 set_Wstrict_aliasing (opts
, value
);
1450 case OPT_Wstrict_overflow
:
1451 opts
->x_warn_strict_overflow
= (value
1452 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1456 case OPT_Wsystem_headers
:
1457 dc
->dc_warn_system_headers
= value
;
1461 opts
->x_flag_gen_aux_info
= 1;
1464 case OPT_auxbase_strip
:
1466 char *tmp
= xstrdup (arg
);
1467 strip_off_ending (tmp
, strlen (tmp
));
1469 opts
->x_aux_base_name
= tmp
;
1476 decode_d_option (arg
, opts
, loc
, dc
);
1479 case OPT_fcall_used_
:
1480 case OPT_fcall_saved_
:
1485 case OPT_fdbg_cnt_list
:
1489 case OPT_fdebug_prefix_map_
:
1493 case OPT_fdiagnostics_show_location_
:
1494 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1497 case OPT_fdiagnostics_show_caret
:
1498 dc
->show_caret
= value
;
1501 case OPT_fdiagnostics_show_option
:
1502 dc
->show_option_requested
= value
;
1509 case OPT_ffast_math
:
1510 set_fast_math_flags (opts
, value
);
1513 case OPT_funsafe_math_optimizations
:
1514 set_unsafe_math_optimizations_flags (opts
, value
);
1521 case OPT_finline_limit_
:
1522 set_param_value ("max-inline-insns-single", value
/ 2,
1523 opts
->x_param_values
, opts_set
->x_param_values
);
1524 set_param_value ("max-inline-insns-auto", value
/ 2,
1525 opts
->x_param_values
, opts_set
->x_param_values
);
1528 case OPT_finstrument_functions_exclude_function_list_
:
1529 add_comma_separated_to_vector
1530 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1533 case OPT_finstrument_functions_exclude_file_list_
:
1534 add_comma_separated_to_vector
1535 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1538 case OPT_fmessage_length_
:
1539 pp_set_line_maximum_length (dc
->printer
, value
);
1540 diagnostic_set_caret_max_width (dc
, value
);
1544 case OPT_fopt_info_
:
1548 case OPT_fpack_struct_
:
1549 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1551 "structure alignment must be a small power of two, not %d",
1554 opts
->x_initial_max_fld_align
= value
;
1558 case OPT_fplugin_arg_
:
1562 case OPT_fprofile_use_
:
1563 opts
->x_profile_data_prefix
= xstrdup (arg
);
1564 opts
->x_flag_profile_use
= true;
1566 /* No break here - do -fprofile-use processing. */
1567 case OPT_fprofile_use
:
1568 if (!opts_set
->x_flag_branch_probabilities
)
1569 opts
->x_flag_branch_probabilities
= value
;
1570 if (!opts_set
->x_flag_profile_values
)
1571 opts
->x_flag_profile_values
= value
;
1572 if (!opts_set
->x_flag_unroll_loops
)
1573 opts
->x_flag_unroll_loops
= value
;
1574 if (!opts_set
->x_flag_peel_loops
)
1575 opts
->x_flag_peel_loops
= value
;
1576 if (!opts_set
->x_flag_tracer
)
1577 opts
->x_flag_tracer
= value
;
1578 if (!opts_set
->x_flag_value_profile_transformations
)
1579 opts
->x_flag_value_profile_transformations
= value
;
1580 if (!opts_set
->x_flag_inline_functions
)
1581 opts
->x_flag_inline_functions
= value
;
1582 if (!opts_set
->x_flag_ipa_cp
)
1583 opts
->x_flag_ipa_cp
= value
;
1584 if (!opts_set
->x_flag_ipa_cp_clone
1585 && value
&& opts
->x_flag_ipa_cp
)
1586 opts
->x_flag_ipa_cp_clone
= value
;
1587 if (!opts_set
->x_flag_predictive_commoning
)
1588 opts
->x_flag_predictive_commoning
= value
;
1589 if (!opts_set
->x_flag_unswitch_loops
)
1590 opts
->x_flag_unswitch_loops
= value
;
1591 if (!opts_set
->x_flag_gcse_after_reload
)
1592 opts
->x_flag_gcse_after_reload
= value
;
1593 if (!opts_set
->x_flag_tree_vectorize
)
1594 opts
->x_flag_tree_vectorize
= value
;
1595 if (!opts_set
->x_flag_vect_cost_model
)
1596 opts
->x_flag_vect_cost_model
= value
;
1597 if (!opts_set
->x_flag_tree_loop_distribute_patterns
)
1598 opts
->x_flag_tree_loop_distribute_patterns
= value
;
1601 case OPT_fprofile_generate_
:
1602 opts
->x_profile_data_prefix
= xstrdup (arg
);
1604 /* No break here - do -fprofile-generate processing. */
1605 case OPT_fprofile_generate
:
1606 if (!opts_set
->x_profile_arc_flag
)
1607 opts
->x_profile_arc_flag
= value
;
1608 if (!opts_set
->x_flag_profile_values
)
1609 opts
->x_flag_profile_values
= value
;
1610 if (!opts_set
->x_flag_inline_functions
)
1611 opts
->x_flag_inline_functions
= value
;
1612 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1613 quadratic. Disable the pass until better memory representation
1615 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1616 opts
->x_flag_ipa_reference
= false;
1619 case OPT_fshow_column
:
1620 dc
->show_column
= value
;
1623 case OPT_frandom_seed
:
1624 /* The real switch is -fno-random-seed. */
1630 case OPT_frandom_seed_
:
1634 case OPT_fsched_verbose_
:
1635 #ifdef INSN_SCHEDULING
1636 /* Handled with Var in common.opt. */
1642 case OPT_fsched_stalled_insns_
:
1643 opts
->x_flag_sched_stalled_insns
= value
;
1644 if (opts
->x_flag_sched_stalled_insns
== 0)
1645 opts
->x_flag_sched_stalled_insns
= -1;
1648 case OPT_fsched_stalled_insns_dep_
:
1649 opts
->x_flag_sched_stalled_insns_dep
= value
;
1652 case OPT_fstack_check_
:
1653 if (!strcmp (arg
, "no"))
1654 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1655 else if (!strcmp (arg
, "generic"))
1656 /* This is the old stack checking method. */
1657 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1658 ? FULL_BUILTIN_STACK_CHECK
1659 : GENERIC_STACK_CHECK
;
1660 else if (!strcmp (arg
, "specific"))
1661 /* This is the new stack checking method. */
1662 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1663 ? FULL_BUILTIN_STACK_CHECK
1664 : STACK_CHECK_STATIC_BUILTIN
1665 ? STATIC_BUILTIN_STACK_CHECK
1666 : GENERIC_STACK_CHECK
;
1668 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1671 case OPT_fstack_limit
:
1672 /* The real switch is -fno-stack-limit. */
1678 case OPT_fstack_limit_register_
:
1679 case OPT_fstack_limit_symbol_
:
1683 case OPT_fstack_usage
:
1684 opts
->x_flag_stack_usage
= value
;
1685 opts
->x_flag_stack_usage_info
= value
!= 0;
1688 case OPT_ftree_vectorizer_verbose_
:
1689 /* -ftree-vectorizer-verbose is deprecated. It is defined in
1690 -terms of fopt-info=N. */
1695 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1700 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1704 if (value
< 2 || value
> 4)
1705 error_at (loc
, "dwarf version %d is not supported", value
);
1707 opts
->x_dwarf_version
= value
;
1708 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1711 case OPT_gsplit_dwarf
:
1712 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
1717 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1722 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1727 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1732 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1736 case OPT_pedantic_errors
:
1737 dc
->pedantic_errors
= 1;
1738 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1740 handlers
, opts
, opts_set
,
1745 opts
->x_flag_lto
= value
? "" : NULL
;
1749 dc
->dc_inhibit_warnings
= true;
1752 case OPT_fmax_errors_
:
1753 dc
->max_errors
= value
;
1756 case OPT_fuse_linker_plugin
:
1757 /* No-op. Used by the driver and passed to us because it starts with f.*/
1761 /* If the flag was handled in a standard way, assume the lack of
1762 processing here is intentional. */
1763 gcc_assert (option_flag_var (scode
, opts
));
1767 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
1772 /* Handle --param NAME=VALUE. */
1774 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1775 location_t loc
, const char *carg
)
1780 arg
= xstrdup (carg
);
1781 equal
= strchr (arg
, '=');
1783 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1787 value
= integral_argument (equal
+ 1);
1789 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1793 set_param_value (arg
, value
,
1794 opts
->x_param_values
, opts_set
->x_param_values
);
1801 /* Used to set the level of strict aliasing warnings in OPTS,
1802 when no level is specified (i.e., when -Wstrict-aliasing, and not
1803 -Wstrict-aliasing=level was given).
1804 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1805 and 0 otherwise. After calling this function, wstrict_aliasing will be
1806 set to the default value of -Wstrict_aliasing=level, currently 3. */
1808 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1810 gcc_assert (onoff
== 0 || onoff
== 1);
1812 opts
->x_warn_strict_aliasing
= 3;
1814 opts
->x_warn_strict_aliasing
= 0;
1817 /* The following routines are useful in setting all the flags that
1818 -ffast-math and -fno-fast-math imply. */
1820 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1822 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1824 opts
->x_flag_unsafe_math_optimizations
= set
;
1825 set_unsafe_math_optimizations_flags (opts
, set
);
1827 if (!opts
->frontend_set_flag_finite_math_only
)
1828 opts
->x_flag_finite_math_only
= set
;
1829 if (!opts
->frontend_set_flag_errno_math
)
1830 opts
->x_flag_errno_math
= !set
;
1833 if (!opts
->frontend_set_flag_signaling_nans
)
1834 opts
->x_flag_signaling_nans
= 0;
1835 if (!opts
->frontend_set_flag_rounding_math
)
1836 opts
->x_flag_rounding_math
= 0;
1837 if (!opts
->frontend_set_flag_cx_limited_range
)
1838 opts
->x_flag_cx_limited_range
= 1;
1842 /* When -funsafe-math-optimizations is set the following
1843 flags are set as well. */
1845 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1847 if (!opts
->frontend_set_flag_trapping_math
)
1848 opts
->x_flag_trapping_math
= !set
;
1849 if (!opts
->frontend_set_flag_signed_zeros
)
1850 opts
->x_flag_signed_zeros
= !set
;
1851 if (!opts
->frontend_set_flag_associative_math
)
1852 opts
->x_flag_associative_math
= set
;
1853 if (!opts
->frontend_set_flag_reciprocal_math
)
1854 opts
->x_flag_reciprocal_math
= set
;
1857 /* Return true iff flags in OPTS are set as if -ffast-math. */
1859 fast_math_flags_set_p (const struct gcc_options
*opts
)
1861 return (!opts
->x_flag_trapping_math
1862 && opts
->x_flag_unsafe_math_optimizations
1863 && opts
->x_flag_finite_math_only
1864 && !opts
->x_flag_signed_zeros
1865 && !opts
->x_flag_errno_math
);
1868 /* Return true iff flags are set as if -ffast-math but using the flags stored
1869 in the struct cl_optimization structure. */
1871 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1873 return (!opt
->x_flag_trapping_math
1874 && opt
->x_flag_unsafe_math_optimizations
1875 && opt
->x_flag_finite_math_only
1876 && !opt
->x_flag_signed_zeros
1877 && !opt
->x_flag_errno_math
);
1880 /* Handle a debug output -g switch for options OPTS
1881 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1882 explicitly), location LOC. EXTENDED is true or false to support
1883 extended output (2 is special and means "-ggdb" was given). */
1885 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1886 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1889 opts
->x_use_gnu_debug_info_extensions
= extended
;
1891 if (type
== NO_DEBUG
)
1893 if (opts
->x_write_symbols
== NO_DEBUG
)
1895 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1899 #ifdef DWARF2_DEBUGGING_INFO
1900 opts
->x_write_symbols
= DWARF2_DEBUG
;
1901 #elif defined DBX_DEBUGGING_INFO
1902 opts
->x_write_symbols
= DBX_DEBUG
;
1906 if (opts
->x_write_symbols
== NO_DEBUG
)
1907 warning_at (loc
, 0, "target system does not support debug output");
1912 /* Does it conflict with an already selected type? */
1913 if (opts_set
->x_write_symbols
!= NO_DEBUG
1914 && opts
->x_write_symbols
!= NO_DEBUG
1915 && type
!= opts
->x_write_symbols
)
1916 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1917 debug_type_names
[type
]);
1918 opts
->x_write_symbols
= type
;
1919 opts_set
->x_write_symbols
= type
;
1922 /* A debug flag without a level defaults to level 2. */
1925 if (!opts
->x_debug_info_level
)
1926 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1930 int argval
= integral_argument (arg
);
1932 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1933 else if (argval
> 3)
1934 error_at (loc
, "debug output level %s is too high", arg
);
1936 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1940 /* Arrange to dump core on error for diagnostic context DC. (The
1941 regular error message is still printed first, except in the case of
1945 setup_core_dumping (diagnostic_context
*dc
)
1948 signal (SIGABRT
, SIG_DFL
);
1950 #if defined(HAVE_SETRLIMIT)
1953 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1954 fatal_error ("getting core file size maximum limit: %m");
1955 rlim
.rlim_cur
= rlim
.rlim_max
;
1956 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1957 fatal_error ("setting core file size limit to maximum: %m");
1960 diagnostic_abort_on_error (dc
);
1963 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1964 diagnostic context DC. */
1967 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1968 location_t loc
, diagnostic_context
*dc
)
1976 opts
->x_flag_debug_asm
= 1;
1979 opts
->x_flag_print_asm_name
= 1;
1982 opts
->x_flag_dump_rtl_in_asm
= 1;
1983 opts
->x_flag_print_asm_name
= 1;
1986 opts
->x_graph_dump_format
= vcg
;
1989 opts
->x_rtl_dump_and_exit
= 1;
1991 case 'D': /* These are handled by the preprocessor. */
1998 setup_core_dumping (dc
);
2001 opts
->x_flag_dump_all_passed
= true;
2005 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2010 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2011 mask LANG_MASK, option handlers HANDLERS) as an error for option
2012 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2013 NULL), location LOC. This is used by -Werror=. */
2016 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2017 const struct cl_option_handlers
*handlers
,
2018 struct gcc_options
*opts
,
2019 struct gcc_options
*opts_set
,
2020 location_t loc
, diagnostic_context
*dc
)
2025 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2026 new_option
[0] = 'W';
2027 strcpy (new_option
+ 1, arg
);
2028 option_index
= find_opt (new_option
, lang_mask
);
2029 if (option_index
== OPT_SPECIAL_unknown
)
2031 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2035 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2037 control_warning_option (option_index
, (int) kind
, value
,
2039 handlers
, opts
, opts_set
, dc
);
2044 /* Return malloced memory for the name of the option OPTION_INDEX
2045 which enabled a diagnostic (context CONTEXT), originally of type
2046 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2050 option_name (diagnostic_context
*context
, int option_index
,
2051 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2055 /* A warning classified as an error. */
2056 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2057 && diag_kind
== DK_ERROR
)
2058 return concat (cl_options
[OPT_Werror_
].opt_text
,
2059 /* Skip over "-W". */
2060 cl_options
[option_index
].opt_text
+ 2,
2062 /* A warning with option. */
2064 return xstrdup (cl_options
[option_index
].opt_text
);
2066 /* A warning without option classified as an error. */
2067 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2068 || diag_kind
== DK_WARNING
)
2070 if (context
->warning_as_error_requested
)
2071 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2073 return xstrdup (_("enabled by default"));