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
);
834 #define LEFT_COLUMN 27
836 /* Output ITEM, of length ITEM_WIDTH, in the left column,
837 followed by word-wrapped HELP in a second column. */
839 wrap_help (const char *help
,
841 unsigned int item_width
,
842 unsigned int columns
)
844 unsigned int col_width
= LEFT_COLUMN
;
845 unsigned int remaining
, room
, len
;
847 remaining
= strlen (help
);
851 room
= columns
- 3 - MAX (col_width
, item_width
);
860 for (i
= 0; help
[i
]; i
++)
862 if (i
>= room
&& len
!= remaining
)
866 else if ((help
[i
] == '-' || help
[i
] == '/')
867 && help
[i
+ 1] != ' '
868 && i
> 0 && ISALPHA (help
[i
- 1]))
873 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
875 while (help
[len
] == ' ')
883 /* Print help for a specific front-end, etc. */
885 print_filtered_help (unsigned int include_flags
,
886 unsigned int exclude_flags
,
887 unsigned int any_flags
,
888 unsigned int columns
,
889 struct gcc_options
*opts
,
890 unsigned int lang_mask
)
895 bool displayed
= false;
897 if (include_flags
== CL_PARAMS
)
899 for (i
= 0; i
< LAST_PARAM
; i
++)
901 const char *param
= compiler_params
[i
].option
;
903 help
= compiler_params
[i
].help
;
904 if (help
== NULL
|| *help
== '\0')
906 if (exclude_flags
& CL_UNDOCUMENTED
)
908 help
= undocumented_msg
;
911 /* Get the translation. */
914 wrap_help (help
, param
, strlen (param
), columns
);
920 if (!opts
->x_help_printed
)
921 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
923 if (!opts
->x_help_enum_printed
)
924 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
926 for (i
= 0; i
< cl_options_count
; i
++)
929 const struct cl_option
*option
= cl_options
+ i
;
934 if (include_flags
== 0
935 || ((option
->flags
& include_flags
) != include_flags
))
937 if ((option
->flags
& any_flags
) == 0)
941 /* Skip unwanted switches. */
942 if ((option
->flags
& exclude_flags
) != 0)
945 /* The driver currently prints its own help text. */
946 if ((option
->flags
& CL_DRIVER
) != 0
947 && (option
->flags
& (((1U << cl_lang_count
) - 1)
948 | CL_COMMON
| CL_TARGET
)) == 0)
952 /* Skip switches that have already been printed. */
953 if (opts
->x_help_printed
[i
])
956 opts
->x_help_printed
[i
] = true;
961 if (exclude_flags
& CL_UNDOCUMENTED
)
963 help
= undocumented_msg
;
966 /* Get the translation. */
969 /* Find the gap between the name of the
970 option and its descriptive text. */
971 tab
= strchr (help
, '\t');
980 opt
= option
->opt_text
;
984 /* With the -Q option enabled we change the descriptive text associated
985 with an option to be an indication of its current setting. */
986 if (!opts
->x_quiet_flag
)
988 void *flag_var
= option_flag_var (i
, opts
);
990 if (len
< (LEFT_COLUMN
+ 2))
991 strcpy (new_help
, "\t\t");
993 strcpy (new_help
, "\t");
996 && option
->var_type
!= CLVC_DEFER
)
998 if (option
->flags
& CL_JOINED
)
1000 if (option
->var_type
== CLVC_STRING
)
1002 if (* (const char **) flag_var
!= NULL
)
1003 snprintf (new_help
+ strlen (new_help
),
1004 sizeof (new_help
) - strlen (new_help
),
1005 * (const char **) flag_var
);
1007 else if (option
->var_type
== CLVC_ENUM
)
1009 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1011 const char *arg
= NULL
;
1013 value
= e
->get (flag_var
);
1014 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1016 arg
= _("[default]");
1017 snprintf (new_help
+ strlen (new_help
),
1018 sizeof (new_help
) - strlen (new_help
),
1022 sprintf (new_help
+ strlen (new_help
),
1023 "%#x", * (int *) flag_var
);
1026 strcat (new_help
, option_enabled (i
, opts
)
1027 ? _("[enabled]") : _("[disabled]"));
1033 wrap_help (help
, opt
, len
, columns
);
1036 if (option
->var_type
== CLVC_ENUM
1037 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1038 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1043 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1046 printf (_(" No options with the desired characteristics were found\n"));
1051 /* PR 31349: Tell the user how to see all of the
1052 options supported by a specific front end. */
1053 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1054 if ((1U << i
) & langs
)
1055 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1056 lang_names
[i
], lang_names
[i
]);
1060 else if (! displayed
)
1061 printf (_(" All options with the desired characteristics have already been displayed\n"));
1065 /* Print details of enumerated option arguments, if those
1066 enumerations have help text headings provided. If no help text
1067 is provided, presume that the possible values are listed in the
1068 help text for the relevant options. */
1069 for (i
= 0; i
< cl_enums_count
; i
++)
1071 unsigned int j
, pos
;
1073 if (opts
->x_help_enum_printed
[i
] != 1)
1075 if (cl_enums
[i
].help
== NULL
)
1077 printf (" %s\n ", _(cl_enums
[i
].help
));
1079 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1081 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1083 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1085 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1095 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1100 opts
->x_help_enum_printed
[i
] = 2;
1104 /* Display help for a specified type of option.
1105 The options must have ALL of the INCLUDE_FLAGS set
1106 ANY of the flags in the ANY_FLAGS set
1107 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1108 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1110 print_specific_help (unsigned int include_flags
,
1111 unsigned int exclude_flags
,
1112 unsigned int any_flags
,
1113 struct gcc_options
*opts
,
1114 unsigned int lang_mask
)
1116 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1117 const char * description
= NULL
;
1118 const char * descrip_extra
= "";
1122 /* Sanity check: Make sure that we do not have more
1123 languages than we have bits available to enumerate them. */
1124 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1126 /* If we have not done so already, obtain
1127 the desired maximum width of the output. */
1128 if (opts
->x_help_columns
== 0)
1132 p
= getenv ("COLUMNS");
1135 int value
= atoi (p
);
1138 opts
->x_help_columns
= value
;
1141 if (opts
->x_help_columns
== 0)
1142 /* Use a reasonable default. */
1143 opts
->x_help_columns
= 80;
1146 /* Decide upon the title for the options that we are going to display. */
1147 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1149 switch (flag
& include_flags
)
1156 description
= _("The following options are target specific");
1159 description
= _("The following options control compiler warning messages");
1161 case CL_OPTIMIZATION
:
1162 description
= _("The following options control optimizations");
1165 description
= _("The following options are language-independent");
1168 description
= _("The --param option recognizes the following as parameters");
1171 if (i
>= cl_lang_count
)
1173 if (exclude_flags
& all_langs_mask
)
1174 description
= _("The following options are specific to just the language ");
1176 description
= _("The following options are supported by the language ");
1177 descrip_extra
= lang_names
[i
];
1182 if (description
== NULL
)
1186 if (include_flags
& CL_UNDOCUMENTED
)
1187 description
= _("The following options are not documented");
1188 else if (include_flags
& CL_SEPARATE
)
1189 description
= _("The following options take separate arguments");
1190 else if (include_flags
& CL_JOINED
)
1191 description
= _("The following options take joined arguments");
1194 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1201 if (any_flags
& all_langs_mask
)
1202 description
= _("The following options are language-related");
1204 description
= _("The following options are language-independent");
1208 printf ("%s%s:\n", description
, descrip_extra
);
1209 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1210 opts
->x_help_columns
, opts
, lang_mask
);
1213 /* Handle target- and language-independent options. Return zero to
1214 generate an "unknown option" message. Only options that need
1215 extra handling need to be listed here; if you simply want
1216 DECODED->value assigned to a variable, it happens automatically. */
1219 common_handle_option (struct gcc_options
*opts
,
1220 struct gcc_options
*opts_set
,
1221 const struct cl_decoded_option
*decoded
,
1222 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1224 const struct cl_option_handlers
*handlers
,
1225 diagnostic_context
*dc
)
1227 size_t scode
= decoded
->opt_index
;
1228 const char *arg
= decoded
->arg
;
1229 int value
= decoded
->value
;
1230 enum opt_code code
= (enum opt_code
) scode
;
1232 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1237 handle_param (opts
, opts_set
, loc
, arg
);
1242 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1243 unsigned int undoc_mask
;
1246 if (lang_mask
== CL_DRIVER
)
1249 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1252 /* First display any single language specific options. */
1253 for (i
= 0; i
< cl_lang_count
; i
++)
1255 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1257 /* Next display any multi language specific options. */
1258 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1259 /* Then display any remaining, non-language options. */
1260 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1262 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1263 opts
->x_exit_after_options
= true;
1267 case OPT__target_help
:
1268 if (lang_mask
== CL_DRIVER
)
1271 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1272 opts
->x_exit_after_options
= true;
1277 const char * a
= arg
;
1278 unsigned int include_flags
= 0;
1279 /* Note - by default we include undocumented options when listing
1280 specific classes. If you only want to see documented options
1281 then add ",^undocumented" to the --help= option. E.g.:
1283 --help=target,^undocumented */
1284 unsigned int exclude_flags
= 0;
1286 if (lang_mask
== CL_DRIVER
)
1289 /* Walk along the argument string, parsing each word in turn.
1291 arg = [^]{word}[,{arg}]
1292 word = {optimizers|target|warnings|undocumented|
1293 params|common|<language>} */
1298 const char * string
;
1303 { "optimizers", CL_OPTIMIZATION
},
1304 { "target", CL_TARGET
},
1305 { "warnings", CL_WARNING
},
1306 { "undocumented", CL_UNDOCUMENTED
},
1307 { "params", CL_PARAMS
},
1308 { "joined", CL_JOINED
},
1309 { "separate", CL_SEPARATE
},
1310 { "common", CL_COMMON
},
1313 unsigned int * pflags
;
1315 unsigned int lang_flag
, specific_flag
;
1322 pflags
= & exclude_flags
;
1325 pflags
= & include_flags
;
1327 comma
= strchr (a
, ',');
1338 /* Check to see if the string matches an option class name. */
1339 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1340 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1342 specific_flag
= specifics
[i
].flag
;
1346 /* Check to see if the string matches a language name.
1347 Note - we rely upon the alpha-sorted nature of the entries in
1348 the lang_names array, specifically that shorter names appear
1349 before their longer variants. (i.e. C before C++). That way
1350 when we are attempting to match --help=c for example we will
1351 match with C first and not C++. */
1352 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1353 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1355 lang_flag
= 1U << i
;
1359 if (specific_flag
!= 0)
1362 * pflags
|= specific_flag
;
1365 /* The option's argument matches both the start of a
1366 language name and the start of an option class name.
1367 We have a special case for when the user has
1368 specified "--help=c", but otherwise we have to issue
1370 if (strncasecmp (a
, "c", len
) == 0)
1371 * pflags
|= lang_flag
;
1374 "--help argument %q.*s is ambiguous, "
1375 "please be more specific",
1379 else if (lang_flag
!= 0)
1380 * pflags
|= lang_flag
;
1383 "unrecognized argument to --help= option: %q.*s",
1392 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1394 opts
->x_exit_after_options
= true;
1399 if (lang_mask
== CL_DRIVER
)
1402 opts
->x_exit_after_options
= true;
1409 /* Currently handled in a prescan. */
1413 dc
->warning_as_error_requested
= value
;
1417 if (lang_mask
== CL_DRIVER
)
1420 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1421 opts
, opts_set
, loc
, dc
);
1424 case OPT_Wlarger_than_
:
1425 opts
->x_larger_than_size
= value
;
1426 opts
->x_warn_larger_than
= value
!= -1;
1429 case OPT_Wfatal_errors
:
1430 dc
->fatal_errors
= value
;
1433 case OPT_Wframe_larger_than_
:
1434 opts
->x_frame_larger_than_size
= value
;
1435 opts
->x_warn_frame_larger_than
= value
!= -1;
1438 case OPT_Wstack_usage_
:
1439 opts
->x_warn_stack_usage
= value
;
1440 opts
->x_flag_stack_usage_info
= value
!= -1;
1443 case OPT_Wstrict_aliasing
:
1444 set_Wstrict_aliasing (opts
, value
);
1447 case OPT_Wstrict_overflow
:
1448 opts
->x_warn_strict_overflow
= (value
1449 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1453 case OPT_Wsystem_headers
:
1454 dc
->dc_warn_system_headers
= value
;
1458 opts
->x_flag_gen_aux_info
= 1;
1461 case OPT_auxbase_strip
:
1463 char *tmp
= xstrdup (arg
);
1464 strip_off_ending (tmp
, strlen (tmp
));
1466 opts
->x_aux_base_name
= tmp
;
1473 decode_d_option (arg
, opts
, loc
, dc
);
1476 case OPT_fcall_used_
:
1477 case OPT_fcall_saved_
:
1482 case OPT_fdbg_cnt_list
:
1486 case OPT_fdebug_prefix_map_
:
1490 case OPT_fdiagnostics_show_location_
:
1491 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1494 case OPT_fdiagnostics_show_caret
:
1495 dc
->show_caret
= value
;
1498 case OPT_fdiagnostics_show_option
:
1499 dc
->show_option_requested
= value
;
1506 case OPT_ffast_math
:
1507 set_fast_math_flags (opts
, value
);
1510 case OPT_funsafe_math_optimizations
:
1511 set_unsafe_math_optimizations_flags (opts
, value
);
1518 case OPT_finline_limit_
:
1519 set_param_value ("max-inline-insns-single", value
/ 2,
1520 opts
->x_param_values
, opts_set
->x_param_values
);
1521 set_param_value ("max-inline-insns-auto", value
/ 2,
1522 opts
->x_param_values
, opts_set
->x_param_values
);
1525 case OPT_finstrument_functions_exclude_function_list_
:
1526 add_comma_separated_to_vector
1527 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1530 case OPT_finstrument_functions_exclude_file_list_
:
1531 add_comma_separated_to_vector
1532 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1535 case OPT_fmessage_length_
:
1536 pp_set_line_maximum_length (dc
->printer
, value
);
1537 diagnostic_set_caret_max_width (dc
, value
);
1541 case OPT_fopt_info_
:
1545 case OPT_fpack_struct_
:
1546 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1548 "structure alignment must be a small power of two, not %d",
1551 opts
->x_initial_max_fld_align
= value
;
1555 case OPT_fplugin_arg_
:
1559 case OPT_fprofile_use_
:
1560 opts
->x_profile_data_prefix
= xstrdup (arg
);
1561 opts
->x_flag_profile_use
= true;
1563 /* No break here - do -fprofile-use processing. */
1564 case OPT_fprofile_use
:
1565 if (!opts_set
->x_flag_branch_probabilities
)
1566 opts
->x_flag_branch_probabilities
= value
;
1567 if (!opts_set
->x_flag_profile_values
)
1568 opts
->x_flag_profile_values
= value
;
1569 if (!opts_set
->x_flag_unroll_loops
)
1570 opts
->x_flag_unroll_loops
= value
;
1571 if (!opts_set
->x_flag_peel_loops
)
1572 opts
->x_flag_peel_loops
= value
;
1573 if (!opts_set
->x_flag_tracer
)
1574 opts
->x_flag_tracer
= value
;
1575 if (!opts_set
->x_flag_value_profile_transformations
)
1576 opts
->x_flag_value_profile_transformations
= value
;
1577 if (!opts_set
->x_flag_inline_functions
)
1578 opts
->x_flag_inline_functions
= value
;
1579 if (!opts_set
->x_flag_ipa_cp
)
1580 opts
->x_flag_ipa_cp
= value
;
1581 if (!opts_set
->x_flag_ipa_cp_clone
1582 && value
&& opts
->x_flag_ipa_cp
)
1583 opts
->x_flag_ipa_cp_clone
= value
;
1584 if (!opts_set
->x_flag_predictive_commoning
)
1585 opts
->x_flag_predictive_commoning
= value
;
1586 if (!opts_set
->x_flag_unswitch_loops
)
1587 opts
->x_flag_unswitch_loops
= value
;
1588 if (!opts_set
->x_flag_gcse_after_reload
)
1589 opts
->x_flag_gcse_after_reload
= value
;
1592 case OPT_fprofile_generate_
:
1593 opts
->x_profile_data_prefix
= xstrdup (arg
);
1595 /* No break here - do -fprofile-generate processing. */
1596 case OPT_fprofile_generate
:
1597 if (!opts_set
->x_profile_arc_flag
)
1598 opts
->x_profile_arc_flag
= value
;
1599 if (!opts_set
->x_flag_profile_values
)
1600 opts
->x_flag_profile_values
= value
;
1601 if (!opts_set
->x_flag_inline_functions
)
1602 opts
->x_flag_inline_functions
= value
;
1603 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1604 quadratic. Disable the pass until better memory representation
1606 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1607 opts
->x_flag_ipa_reference
= false;
1610 case OPT_fshow_column
:
1611 dc
->show_column
= value
;
1614 case OPT_frandom_seed
:
1615 /* The real switch is -fno-random-seed. */
1621 case OPT_frandom_seed_
:
1625 case OPT_fsched_verbose_
:
1626 #ifdef INSN_SCHEDULING
1627 /* Handled with Var in common.opt. */
1633 case OPT_fsched_stalled_insns_
:
1634 opts
->x_flag_sched_stalled_insns
= value
;
1635 if (opts
->x_flag_sched_stalled_insns
== 0)
1636 opts
->x_flag_sched_stalled_insns
= -1;
1639 case OPT_fsched_stalled_insns_dep_
:
1640 opts
->x_flag_sched_stalled_insns_dep
= value
;
1643 case OPT_fstack_check_
:
1644 if (!strcmp (arg
, "no"))
1645 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1646 else if (!strcmp (arg
, "generic"))
1647 /* This is the old stack checking method. */
1648 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1649 ? FULL_BUILTIN_STACK_CHECK
1650 : GENERIC_STACK_CHECK
;
1651 else if (!strcmp (arg
, "specific"))
1652 /* This is the new stack checking method. */
1653 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1654 ? FULL_BUILTIN_STACK_CHECK
1655 : STACK_CHECK_STATIC_BUILTIN
1656 ? STATIC_BUILTIN_STACK_CHECK
1657 : GENERIC_STACK_CHECK
;
1659 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1662 case OPT_fstack_limit
:
1663 /* The real switch is -fno-stack-limit. */
1669 case OPT_fstack_limit_register_
:
1670 case OPT_fstack_limit_symbol_
:
1674 case OPT_fstack_usage
:
1675 opts
->x_flag_stack_usage
= value
;
1676 opts
->x_flag_stack_usage_info
= value
!= 0;
1679 case OPT_ftree_vectorizer_verbose_
:
1680 /* -ftree-vectorizer-verbose is deprecated. It is defined in
1681 -terms of fopt-info=N. */
1686 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1691 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1695 if (value
< 2 || value
> 4)
1696 error_at (loc
, "dwarf version %d is not supported", value
);
1698 opts
->x_dwarf_version
= value
;
1699 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1703 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1708 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1713 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1718 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1722 case OPT_pedantic_errors
:
1723 dc
->pedantic_errors
= 1;
1724 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1726 handlers
, opts
, opts_set
,
1731 opts
->x_flag_lto
= value
? "" : NULL
;
1735 dc
->dc_inhibit_warnings
= true;
1738 case OPT_fmax_errors_
:
1739 dc
->max_errors
= value
;
1742 case OPT_fuse_linker_plugin
:
1743 /* No-op. Used by the driver and passed to us because it starts with f.*/
1747 /* If the flag was handled in a standard way, assume the lack of
1748 processing here is intentional. */
1749 gcc_assert (option_flag_var (scode
, opts
));
1753 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
1758 /* Handle --param NAME=VALUE. */
1760 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1761 location_t loc
, const char *carg
)
1766 arg
= xstrdup (carg
);
1767 equal
= strchr (arg
, '=');
1769 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1773 value
= integral_argument (equal
+ 1);
1775 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1779 set_param_value (arg
, value
,
1780 opts
->x_param_values
, opts_set
->x_param_values
);
1787 /* Used to set the level of strict aliasing warnings in OPTS,
1788 when no level is specified (i.e., when -Wstrict-aliasing, and not
1789 -Wstrict-aliasing=level was given).
1790 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1791 and 0 otherwise. After calling this function, wstrict_aliasing will be
1792 set to the default value of -Wstrict_aliasing=level, currently 3. */
1794 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1796 gcc_assert (onoff
== 0 || onoff
== 1);
1798 opts
->x_warn_strict_aliasing
= 3;
1800 opts
->x_warn_strict_aliasing
= 0;
1803 /* The following routines are useful in setting all the flags that
1804 -ffast-math and -fno-fast-math imply. */
1806 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1808 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1810 opts
->x_flag_unsafe_math_optimizations
= set
;
1811 set_unsafe_math_optimizations_flags (opts
, set
);
1813 if (!opts
->frontend_set_flag_finite_math_only
)
1814 opts
->x_flag_finite_math_only
= set
;
1815 if (!opts
->frontend_set_flag_errno_math
)
1816 opts
->x_flag_errno_math
= !set
;
1819 if (!opts
->frontend_set_flag_signaling_nans
)
1820 opts
->x_flag_signaling_nans
= 0;
1821 if (!opts
->frontend_set_flag_rounding_math
)
1822 opts
->x_flag_rounding_math
= 0;
1823 if (!opts
->frontend_set_flag_cx_limited_range
)
1824 opts
->x_flag_cx_limited_range
= 1;
1828 /* When -funsafe-math-optimizations is set the following
1829 flags are set as well. */
1831 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1833 if (!opts
->frontend_set_flag_trapping_math
)
1834 opts
->x_flag_trapping_math
= !set
;
1835 if (!opts
->frontend_set_flag_signed_zeros
)
1836 opts
->x_flag_signed_zeros
= !set
;
1837 if (!opts
->frontend_set_flag_associative_math
)
1838 opts
->x_flag_associative_math
= set
;
1839 if (!opts
->frontend_set_flag_reciprocal_math
)
1840 opts
->x_flag_reciprocal_math
= set
;
1843 /* Return true iff flags in OPTS are set as if -ffast-math. */
1845 fast_math_flags_set_p (const struct gcc_options
*opts
)
1847 return (!opts
->x_flag_trapping_math
1848 && opts
->x_flag_unsafe_math_optimizations
1849 && opts
->x_flag_finite_math_only
1850 && !opts
->x_flag_signed_zeros
1851 && !opts
->x_flag_errno_math
);
1854 /* Return true iff flags are set as if -ffast-math but using the flags stored
1855 in the struct cl_optimization structure. */
1857 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1859 return (!opt
->x_flag_trapping_math
1860 && opt
->x_flag_unsafe_math_optimizations
1861 && opt
->x_flag_finite_math_only
1862 && !opt
->x_flag_signed_zeros
1863 && !opt
->x_flag_errno_math
);
1866 /* Handle a debug output -g switch for options OPTS
1867 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1868 explicitly), location LOC. EXTENDED is true or false to support
1869 extended output (2 is special and means "-ggdb" was given). */
1871 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1872 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1875 opts
->x_use_gnu_debug_info_extensions
= extended
;
1877 if (type
== NO_DEBUG
)
1879 if (opts
->x_write_symbols
== NO_DEBUG
)
1881 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1885 #ifdef DWARF2_DEBUGGING_INFO
1886 opts
->x_write_symbols
= DWARF2_DEBUG
;
1887 #elif defined DBX_DEBUGGING_INFO
1888 opts
->x_write_symbols
= DBX_DEBUG
;
1892 if (opts
->x_write_symbols
== NO_DEBUG
)
1893 warning_at (loc
, 0, "target system does not support debug output");
1898 /* Does it conflict with an already selected type? */
1899 if (opts_set
->x_write_symbols
!= NO_DEBUG
1900 && opts
->x_write_symbols
!= NO_DEBUG
1901 && type
!= opts
->x_write_symbols
)
1902 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1903 debug_type_names
[type
]);
1904 opts
->x_write_symbols
= type
;
1905 opts_set
->x_write_symbols
= type
;
1908 /* A debug flag without a level defaults to level 2. */
1911 if (!opts
->x_debug_info_level
)
1912 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1916 int argval
= integral_argument (arg
);
1918 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1919 else if (argval
> 3)
1920 error_at (loc
, "debug output level %s is too high", arg
);
1922 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1926 /* Arrange to dump core on error for diagnostic context DC. (The
1927 regular error message is still printed first, except in the case of
1931 setup_core_dumping (diagnostic_context
*dc
)
1934 signal (SIGABRT
, SIG_DFL
);
1936 #if defined(HAVE_SETRLIMIT)
1939 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1940 fatal_error ("getting core file size maximum limit: %m");
1941 rlim
.rlim_cur
= rlim
.rlim_max
;
1942 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1943 fatal_error ("setting core file size limit to maximum: %m");
1946 diagnostic_abort_on_error (dc
);
1949 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1950 diagnostic context DC. */
1953 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1954 location_t loc
, diagnostic_context
*dc
)
1962 opts
->x_flag_debug_asm
= 1;
1965 opts
->x_flag_print_asm_name
= 1;
1968 opts
->x_flag_dump_rtl_in_asm
= 1;
1969 opts
->x_flag_print_asm_name
= 1;
1972 opts
->x_graph_dump_format
= vcg
;
1975 opts
->x_rtl_dump_and_exit
= 1;
1977 case 'D': /* These are handled by the preprocessor. */
1984 setup_core_dumping (dc
);
1987 opts
->x_flag_dump_all_passed
= true;
1991 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1996 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1997 mask LANG_MASK, option handlers HANDLERS) as an error for option
1998 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1999 NULL), location LOC. This is used by -Werror=. */
2002 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2003 const struct cl_option_handlers
*handlers
,
2004 struct gcc_options
*opts
,
2005 struct gcc_options
*opts_set
,
2006 location_t loc
, diagnostic_context
*dc
)
2011 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2012 new_option
[0] = 'W';
2013 strcpy (new_option
+ 1, arg
);
2014 option_index
= find_opt (new_option
, lang_mask
);
2015 if (option_index
== OPT_SPECIAL_unknown
)
2017 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2021 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2023 control_warning_option (option_index
, (int) kind
, value
,
2025 handlers
, opts
, opts_set
, dc
);
2030 /* Return malloced memory for the name of the option OPTION_INDEX
2031 which enabled a diagnostic (context CONTEXT), originally of type
2032 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2036 option_name (diagnostic_context
*context
, int option_index
,
2037 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2041 /* A warning classified as an error. */
2042 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2043 && diag_kind
== DK_ERROR
)
2044 return concat (cl_options
[OPT_Werror_
].opt_text
,
2045 /* Skip over "-W". */
2046 cl_options
[option_index
].opt_text
+ 2,
2048 /* A warning with option. */
2050 return xstrdup (cl_options
[option_index
].opt_text
);
2052 /* A warning without option classified as an error. */
2053 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2054 || diag_kind
== DK_WARNING
)
2056 if (context
->warning_as_error_requested
)
2057 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2059 return xstrdup (_("enabled by default"));