1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
26 #include "tm.h" /* For STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
33 #include "diagnostic.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 /* Indexed by enum debug_info_type. */
39 const char *const debug_type_names
[] =
41 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
44 /* Parse the -femit-struct-debug-detailed option value
45 and set the flag variables. */
47 #define MATCH( prefix, string ) \
48 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
49 ? ((string += sizeof prefix - 1), 1) : 0)
52 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
55 /* various labels for comparison */
56 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
57 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
58 static const char none_lbl
[] = "none", any_lbl
[] = "any";
59 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
61 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
62 /* Default is to apply to as much as possible. */
63 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
67 if (MATCH (dfn_lbl
, spec
))
68 usage
= DINFO_USAGE_DFN
;
69 else if (MATCH (dir_lbl
, spec
))
70 usage
= DINFO_USAGE_DIR_USE
;
71 else if (MATCH (ind_lbl
, spec
))
72 usage
= DINFO_USAGE_IND_USE
;
74 /* Generics or not? */
75 if (MATCH (ord_lbl
, spec
))
77 else if (MATCH (gen_lbl
, spec
))
80 /* What allowable environment? */
81 if (MATCH (none_lbl
, spec
))
82 files
= DINFO_STRUCT_FILE_NONE
;
83 else if (MATCH (any_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_ANY
;
85 else if (MATCH (sys_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_SYS
;
87 else if (MATCH (base_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_BASE
;
91 "argument %qs to %<-femit-struct-debug-detailed%> "
95 /* Effect the specification. */
96 if (usage
== DINFO_USAGE_NUM_ENUMS
)
100 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
101 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
106 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
107 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
114 opts
->x_debug_struct_ordinary
[usage
] = files
;
116 opts
->x_debug_struct_generic
[usage
] = files
;
120 set_struct_debug_option (opts
, loc
, spec
+1);
123 /* No more -femit-struct-debug-detailed specifications.
127 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
129 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
130 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
131 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
132 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
134 "%<-femit-struct-debug-detailed=dir:...%> must allow "
135 "at least as much as "
136 "%<-femit-struct-debug-detailed=ind:...%>");
140 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
143 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
145 if (val
< MAX_VERBOSITY_LEVEL
)
146 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
148 opts
->x_user_vect_verbosity_level
149 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
153 /* Strip off a legitimate source ending from the input string NAME of
154 length LEN. Rather than having to know the names used by all of
155 our front ends, we strip off an ending of a period followed by
156 up to five characters. (Java uses ".class".) */
159 strip_off_ending (char *name
, int len
)
162 for (i
= 2; i
< 6 && len
> i
; i
++)
164 if (name
[len
- i
] == '.')
166 name
[len
- i
] = '\0';
172 /* Find the base name of a path, stripping off both directories and
173 a single final extension. */
175 base_of_path (const char *path
, const char **base_out
)
177 const char *base
= path
;
179 const char *p
= path
;
183 if (IS_DIR_SEPARATOR(c
))
198 /* What to print when a switch has no documentation. */
199 static const char undocumented_msg
[] = N_("This switch lacks documentation");
201 typedef char *char_p
; /* For DEF_VEC_P. */
203 DEF_VEC_ALLOC_P(char_p
,heap
);
205 static void handle_param (struct gcc_options
*opts
,
206 struct gcc_options
*opts_set
, location_t loc
,
208 static void set_debug_level (enum debug_info_type type
, int extended
,
209 const char *arg
, struct gcc_options
*opts
,
210 struct gcc_options
*opts_set
,
212 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
213 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
214 location_t loc
, diagnostic_context
*dc
);
215 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
217 static void enable_warning_as_error (const char *arg
, int value
,
218 unsigned int lang_mask
,
219 const struct cl_option_handlers
*handlers
,
220 struct gcc_options
*opts
,
221 struct gcc_options
*opts_set
,
223 diagnostic_context
*dc
);
225 /* Handle a back-end option; arguments and return value as for
229 target_handle_option (struct gcc_options
*opts
,
230 struct gcc_options
*opts_set
,
231 const struct cl_decoded_option
*decoded
,
232 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
234 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
235 diagnostic_context
*dc
)
237 gcc_assert (dc
== global_dc
);
238 gcc_assert (kind
== DK_UNSPECIFIED
);
239 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
242 /* Add comma-separated strings to a char_p vector. */
245 add_comma_separated_to_vector (void **pvec
, const char *arg
)
251 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
253 /* We never free this string. */
266 VEC_safe_push (char_p
, heap
, vec
, token_start
);
269 if (*r
== '\\' && r
[1] == ',')
277 if (*token_start
!= '\0')
278 VEC_safe_push (char_p
, heap
, vec
, token_start
);
283 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
286 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
288 size_t num_params
= get_num_compiler_params ();
290 *opts
= global_options_init
;
291 memset (opts_set
, 0, sizeof (*opts_set
));
293 opts
->x_param_values
= XNEWVEC (int, num_params
);
294 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
295 init_param_values (opts
->x_param_values
);
297 /* Initialize whether `char' is signed. */
298 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
299 /* Set this to a special "uninitialized" value. The actual default
300 is set after target options have been processed. */
301 opts
->x_flag_short_enums
= 2;
303 /* Initialize target_flags before default_options_optimization
304 so the latter can modify it. */
305 opts
->x_target_flags
= targetm_common
.default_target_flags
;
307 /* Some targets have ABI-specified unwind tables. */
308 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
310 /* Some targets have other target-specific initialization. */
311 targetm_common
.option_init_struct (opts
);
314 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
315 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
316 OPTS_SET, diagnostic context DC, location LOC, with language mask
317 LANG_MASK and option handlers HANDLERS. */
320 maybe_default_option (struct gcc_options
*opts
,
321 struct gcc_options
*opts_set
,
322 const struct default_options
*default_opt
,
323 int level
, bool size
, bool fast
,
324 unsigned int lang_mask
,
325 const struct cl_option_handlers
*handlers
,
327 diagnostic_context
*dc
)
329 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
333 gcc_assert (level
== 2);
335 gcc_assert (level
== 3);
337 switch (default_opt
->levels
)
343 case OPT_LEVELS_0_ONLY
:
344 enabled
= (level
== 0);
347 case OPT_LEVELS_1_PLUS
:
348 enabled
= (level
>= 1);
351 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
352 enabled
= (level
>= 1 && !size
);
355 case OPT_LEVELS_2_PLUS
:
356 enabled
= (level
>= 2);
359 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
360 enabled
= (level
>= 2 && !size
);
363 case OPT_LEVELS_3_PLUS
:
364 enabled
= (level
>= 3);
367 case OPT_LEVELS_3_PLUS_AND_SIZE
:
368 enabled
= (level
>= 3 || size
);
371 case OPT_LEVELS_SIZE
:
375 case OPT_LEVELS_FAST
:
379 case OPT_LEVELS_NONE
:
385 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
386 default_opt
->arg
, default_opt
->value
,
387 lang_mask
, DK_UNSPECIFIED
, loc
,
389 else if (default_opt
->arg
== NULL
390 && !option
->cl_reject_negative
)
391 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
392 default_opt
->arg
, !default_opt
->value
,
393 lang_mask
, DK_UNSPECIFIED
, loc
,
397 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
398 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
399 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
400 language mask LANG_MASK and option handlers HANDLERS. */
403 maybe_default_options (struct gcc_options
*opts
,
404 struct gcc_options
*opts_set
,
405 const struct default_options
*default_opts
,
406 int level
, bool size
, bool fast
,
407 unsigned int lang_mask
,
408 const struct cl_option_handlers
*handlers
,
410 diagnostic_context
*dc
)
414 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
415 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
416 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
419 /* Table of options enabled by default at different levels. */
421 static const struct default_options default_options_table
[] =
423 /* -O1 optimizations. */
424 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
454 /* -O2 optimizations. */
455 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
456 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
457 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
467 #ifdef INSN_SCHEDULING
468 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
469 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, 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
, 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_fipa_cp_clone
, NULL
, 1 },
503 /* -Ofast adds optimizations to -O3. */
504 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
506 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
509 /* Default the options in OPTS and OPTS_SET based on the optimization
510 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
512 default_options_optimization (struct gcc_options
*opts
,
513 struct gcc_options
*opts_set
,
514 struct cl_decoded_option
*decoded_options
,
515 unsigned int decoded_options_count
,
517 unsigned int lang_mask
,
518 const struct cl_option_handlers
*handlers
,
519 diagnostic_context
*dc
)
524 /* Scan to see what optimization level has been specified. That will
525 determine the default value of many flags. */
526 for (i
= 1; i
< decoded_options_count
; i
++)
528 struct cl_decoded_option
*opt
= &decoded_options
[i
];
529 switch (opt
->opt_index
)
532 if (*opt
->arg
== '\0')
534 opts
->x_optimize
= 1;
535 opts
->x_optimize_size
= 0;
536 opts
->x_optimize_fast
= 0;
540 const int optimize_val
= integral_argument (opt
->arg
);
541 if (optimize_val
== -1)
543 "argument to %qs should be a non-negative integer",
547 opts
->x_optimize
= optimize_val
;
548 if ((unsigned int) opts
->x_optimize
> 255)
549 opts
->x_optimize
= 255;
550 opts
->x_optimize_size
= 0;
551 opts
->x_optimize_fast
= 0;
557 opts
->x_optimize_size
= 1;
559 /* Optimizing for size forces optimize to be 2. */
560 opts
->x_optimize
= 2;
561 opts
->x_optimize_fast
= 0;
565 /* -Ofast only adds flags to -O3. */
566 opts
->x_optimize_size
= 0;
567 opts
->x_optimize
= 3;
568 opts
->x_optimize_fast
= 1;
572 /* Ignore other options in this prescan. */
577 maybe_default_options (opts
, opts_set
, default_options_table
,
578 opts
->x_optimize
, opts
->x_optimize_size
,
579 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
581 /* -O2 param settings. */
582 opt2
= (opts
->x_optimize
>= 2);
584 /* Track fields in field-sensitive alias analysis. */
585 maybe_set_param_value
586 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
587 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
588 opts
->x_param_values
, opts_set
->x_param_values
);
590 /* For -O1 only do loop invariant motion for very small loops. */
591 maybe_set_param_value
592 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
593 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
594 opts
->x_param_values
, opts_set
->x_param_values
);
596 if (opts
->x_optimize_size
)
597 /* We want to crossjump as much as possible. */
598 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
599 opts
->x_param_values
, opts_set
->x_param_values
);
601 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
602 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
603 opts
->x_param_values
, opts_set
->x_param_values
);
605 /* Allow default optimizations to be specified on a per-machine basis. */
606 maybe_default_options (opts
, opts_set
,
607 targetm_common
.option_optimization_table
,
608 opts
->x_optimize
, opts
->x_optimize_size
,
609 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
612 /* After all options at LOC have been read into OPTS and OPTS_SET,
613 finalize settings of those options and diagnose incompatible
616 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
619 enum unwind_info_type ui_except
;
621 /* If -gmlt was specified, make sure debug level is at least 1. */
622 if (opts
->x_generate_debug_line_table
623 && opts
->x_debug_info_level
< DINFO_LEVEL_TERSE
)
624 opts
->x_debug_info_level
= DINFO_LEVEL_TERSE
;
626 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
628 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
629 OPTS->X_DUMP_DIR_NAME directory. Then try to make
630 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
631 directory, typically the directory to contain the object
633 if (opts
->x_dump_dir_name
)
634 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
635 opts
->x_dump_base_name
, NULL
);
636 else if (opts
->x_aux_base_name
637 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
639 const char *aux_base
;
641 base_of_path (opts
->x_aux_base_name
, &aux_base
);
642 if (opts
->x_aux_base_name
!= aux_base
)
644 int dir_len
= aux_base
- opts
->x_aux_base_name
;
645 char *new_dump_base_name
=
646 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
648 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
649 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
650 /* Append existing OPTS->X_DUMP_BASE_NAME. */
651 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
652 opts
->x_dump_base_name
= new_dump_base_name
;
657 /* Handle related options for unit-at-a-time, toplevel-reorder, and
659 if (!opts
->x_flag_unit_at_a_time
)
661 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
662 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
664 opts
->x_flag_section_anchors
= 0;
665 if (opts
->x_flag_toplevel_reorder
== 1)
666 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
668 opts
->x_flag_toplevel_reorder
= 0;
671 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
672 sorry ("transactional memory is not supported with non-call exceptions");
674 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
675 if (opts
->x_warn_missing_noreturn
)
676 opts
->x_warn_suggest_attribute_noreturn
= true;
678 /* Unless the user has asked for section anchors, we disable toplevel
679 reordering at -O0 to disable transformations that might be surprising
680 to end users and to get -fno-toplevel-reorder tested. */
681 if (!opts
->x_optimize
682 && opts
->x_flag_toplevel_reorder
== 2
683 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
685 opts
->x_flag_toplevel_reorder
= 0;
686 opts
->x_flag_section_anchors
= 0;
688 if (!opts
->x_flag_toplevel_reorder
)
690 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
691 error_at (loc
, "section anchors must be disabled when toplevel reorder"
693 opts
->x_flag_section_anchors
= 0;
696 if (!opts
->x_flag_opts_finished
)
698 if (opts
->x_flag_pie
)
699 opts
->x_flag_pic
= opts
->x_flag_pie
;
700 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
701 opts
->x_flag_shlib
= 1;
702 opts
->x_flag_opts_finished
= true;
705 if (opts
->x_optimize
== 0)
707 /* Inlining does not work if not optimizing,
708 so force it not to be done. */
709 opts
->x_warn_inline
= 0;
710 opts
->x_flag_no_inline
= 1;
713 /* The optimization to partition hot and cold basic blocks into separate
714 sections of the .o and executable files does not work (currently)
715 with exception handling. This is because there is no support for
716 generating unwind info. If opts->x_flag_exceptions is turned on
717 we need to turn off the partitioning optimization. */
719 ui_except
= targetm_common
.except_unwind_info (opts
);
721 if (opts
->x_flag_exceptions
722 && opts
->x_flag_reorder_blocks_and_partition
723 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
726 "-freorder-blocks-and-partition does not work "
727 "with exceptions on this architecture");
728 opts
->x_flag_reorder_blocks_and_partition
= 0;
729 opts
->x_flag_reorder_blocks
= 1;
732 /* If user requested unwind info, then turn off the partitioning
735 if (opts
->x_flag_unwind_tables
736 && !targetm_common
.unwind_tables_default
737 && opts
->x_flag_reorder_blocks_and_partition
738 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
741 "-freorder-blocks-and-partition does not support "
742 "unwind info on this architecture");
743 opts
->x_flag_reorder_blocks_and_partition
= 0;
744 opts
->x_flag_reorder_blocks
= 1;
747 /* If the target requested unwind info, then turn off the partitioning
748 optimization with a different message. Likewise, if the target does not
749 support named sections. */
751 if (opts
->x_flag_reorder_blocks_and_partition
752 && (!targetm_common
.have_named_sections
753 || (opts
->x_flag_unwind_tables
754 && targetm_common
.unwind_tables_default
755 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
758 "-freorder-blocks-and-partition does not work "
759 "on this architecture");
760 opts
->x_flag_reorder_blocks_and_partition
= 0;
761 opts
->x_flag_reorder_blocks
= 1;
764 if (opts
->x_flag_reorder_blocks_and_partition
765 && !opts_set
->x_flag_reorder_functions
)
766 opts
->x_flag_reorder_functions
= 1;
768 /* Pipelining of outer loops is only possible when general pipelining
769 capabilities are requested. */
770 if (!opts
->x_flag_sel_sched_pipelining
)
771 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
773 if (opts
->x_flag_conserve_stack
)
775 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
776 opts
->x_param_values
, opts_set
->x_param_values
);
777 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
778 opts
->x_param_values
, opts_set
->x_param_values
);
781 if (opts
->x_flag_lto
)
784 opts
->x_flag_generate_lto
= 1;
786 /* When generating IL, do not operate in whole-program mode.
787 Otherwise, symbols will be privatized too early, causing link
789 opts
->x_flag_whole_program
= 0;
791 error_at (loc
, "LTO support has not been enabled in this configuration");
793 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
794 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
796 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
797 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
799 if ((opts
->x_flag_lto_partition_balanced
!= 0)
800 + (opts
->x_flag_lto_partition_1to1
!= 0)
801 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
802 error_at (loc
, "only one -flto-partition value can be specified");
805 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
806 default value if they choose based on other options. */
807 if (opts
->x_flag_split_stack
== -1)
808 opts
->x_flag_split_stack
= 0;
809 else if (opts
->x_flag_split_stack
)
811 if (!targetm_common
.supports_split_stack (true, opts
))
813 error_at (loc
, "%<-fsplit-stack%> is not supported by "
814 "this compiler configuration");
815 opts
->x_flag_split_stack
= 0;
819 if (opts
->x_profile_arc_flag
820 || opts
->x_flag_branch_probabilities
)
822 /* With profile data, inlining is much more selective and makes
823 better decisions, so increase the inlining function size
824 limits. Changes must be added to both the generate and use
825 builds to avoid profile mismatches. */
826 maybe_set_param_value
827 (PARAM_MAX_INLINE_INSNS_SINGLE
, 1000,
828 opts
->x_param_values
, opts_set
->x_param_values
);
829 maybe_set_param_value
830 (PARAM_MAX_INLINE_INSNS_AUTO
, 1000,
831 opts
->x_param_values
, opts_set
->x_param_values
);
834 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
836 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
837 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
838 opts
->x_param_values
, opts_set
->x_param_values
);
840 /* This replaces set_Wunused. */
841 if (opts
->x_warn_unused_function
== -1)
842 opts
->x_warn_unused_function
= opts
->x_warn_unused
;
843 if (opts
->x_warn_unused_label
== -1)
844 opts
->x_warn_unused_label
= opts
->x_warn_unused
;
845 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
846 if (opts
->x_warn_unused_parameter
== -1)
847 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
848 && opts
->x_extra_warnings
);
849 if (opts
->x_warn_unused_variable
== -1)
850 opts
->x_warn_unused_variable
= opts
->x_warn_unused
;
851 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
853 if (opts
->x_warn_unused_but_set_parameter
== -1)
854 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
855 && opts
->x_extra_warnings
);
856 if (opts
->x_warn_unused_but_set_variable
== -1)
857 opts
->x_warn_unused_but_set_variable
= opts
->x_warn_unused
;
858 if (opts
->x_warn_unused_value
== -1)
859 opts
->x_warn_unused_value
= opts
->x_warn_unused
;
861 /* This replaces set_Wextra. */
862 if (opts
->x_warn_uninitialized
== -1)
863 opts
->x_warn_uninitialized
= opts
->x_extra_warnings
;
865 /* Turn on -ffunction-sections when -freorder-functions=* is used. */
866 if (opts
->x_flag_reorder_functions
> 1)
867 opts
->x_flag_function_sections
= 1;
870 #define LEFT_COLUMN 27
872 /* Output ITEM, of length ITEM_WIDTH, in the left column,
873 followed by word-wrapped HELP in a second column. */
875 wrap_help (const char *help
,
877 unsigned int item_width
,
878 unsigned int columns
)
880 unsigned int col_width
= LEFT_COLUMN
;
881 unsigned int remaining
, room
, len
;
883 remaining
= strlen (help
);
887 room
= columns
- 3 - MAX (col_width
, item_width
);
896 for (i
= 0; help
[i
]; i
++)
898 if (i
>= room
&& len
!= remaining
)
902 else if ((help
[i
] == '-' || help
[i
] == '/')
903 && help
[i
+ 1] != ' '
904 && i
> 0 && ISALPHA (help
[i
- 1]))
909 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
911 while (help
[len
] == ' ')
919 /* Print help for a specific front-end, etc. */
921 print_filtered_help (unsigned int include_flags
,
922 unsigned int exclude_flags
,
923 unsigned int any_flags
,
924 unsigned int columns
,
925 struct gcc_options
*opts
,
926 unsigned int lang_mask
)
931 bool displayed
= false;
933 if (include_flags
== CL_PARAMS
)
935 for (i
= 0; i
< LAST_PARAM
; i
++)
937 const char *param
= compiler_params
[i
].option
;
939 help
= compiler_params
[i
].help
;
940 if (help
== NULL
|| *help
== '\0')
942 if (exclude_flags
& CL_UNDOCUMENTED
)
944 help
= undocumented_msg
;
947 /* Get the translation. */
950 wrap_help (help
, param
, strlen (param
), columns
);
956 if (!opts
->x_help_printed
)
957 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
959 if (!opts
->x_help_enum_printed
)
960 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
962 for (i
= 0; i
< cl_options_count
; i
++)
965 const struct cl_option
*option
= cl_options
+ i
;
970 if (include_flags
== 0
971 || ((option
->flags
& include_flags
) != include_flags
))
973 if ((option
->flags
& any_flags
) == 0)
977 /* Skip unwanted switches. */
978 if ((option
->flags
& exclude_flags
) != 0)
981 /* The driver currently prints its own help text. */
982 if ((option
->flags
& CL_DRIVER
) != 0
983 && (option
->flags
& (((1U << cl_lang_count
) - 1)
984 | CL_COMMON
| CL_TARGET
)) == 0)
988 /* Skip switches that have already been printed. */
989 if (opts
->x_help_printed
[i
])
992 opts
->x_help_printed
[i
] = true;
997 if (exclude_flags
& CL_UNDOCUMENTED
)
999 help
= undocumented_msg
;
1002 /* Get the translation. */
1005 /* Find the gap between the name of the
1006 option and its descriptive text. */
1007 tab
= strchr (help
, '\t');
1016 opt
= option
->opt_text
;
1020 /* With the -Q option enabled we change the descriptive text associated
1021 with an option to be an indication of its current setting. */
1022 if (!opts
->x_quiet_flag
)
1024 void *flag_var
= option_flag_var (i
, opts
);
1026 if (len
< (LEFT_COLUMN
+ 2))
1027 strcpy (new_help
, "\t\t");
1029 strcpy (new_help
, "\t");
1031 if (flag_var
!= NULL
1032 && option
->var_type
!= CLVC_DEFER
)
1034 if (option
->flags
& CL_JOINED
)
1036 if (option
->var_type
== CLVC_STRING
)
1038 if (* (const char **) flag_var
!= NULL
)
1039 snprintf (new_help
+ strlen (new_help
),
1040 sizeof (new_help
) - strlen (new_help
),
1041 * (const char **) flag_var
);
1043 else if (option
->var_type
== CLVC_ENUM
)
1045 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1047 const char *arg
= NULL
;
1049 value
= e
->get (flag_var
);
1050 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1052 arg
= _("[default]");
1053 snprintf (new_help
+ strlen (new_help
),
1054 sizeof (new_help
) - strlen (new_help
),
1058 sprintf (new_help
+ strlen (new_help
),
1059 "%#x", * (int *) flag_var
);
1062 strcat (new_help
, option_enabled (i
, opts
)
1063 ? _("[enabled]") : _("[disabled]"));
1069 wrap_help (help
, opt
, len
, columns
);
1072 if (option
->var_type
== CLVC_ENUM
1073 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1074 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1079 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1082 printf (_(" No options with the desired characteristics were found\n"));
1087 /* PR 31349: Tell the user how to see all of the
1088 options supported by a specific front end. */
1089 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1090 if ((1U << i
) & langs
)
1091 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1092 lang_names
[i
], lang_names
[i
]);
1096 else if (! displayed
)
1097 printf (_(" All options with the desired characteristics have already been displayed\n"));
1101 /* Print details of enumerated option arguments, if those
1102 enumerations have help text headings provided. If no help text
1103 is provided, presume that the possible values are listed in the
1104 help text for the relevant options. */
1105 for (i
= 0; i
< cl_enums_count
; i
++)
1107 unsigned int j
, pos
;
1109 if (opts
->x_help_enum_printed
[i
] != 1)
1111 if (cl_enums
[i
].help
== NULL
)
1113 printf (" %s\n ", _(cl_enums
[i
].help
));
1115 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1117 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1119 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1121 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1131 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1136 opts
->x_help_enum_printed
[i
] = 2;
1140 /* Display help for a specified type of option.
1141 The options must have ALL of the INCLUDE_FLAGS set
1142 ANY of the flags in the ANY_FLAGS set
1143 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1144 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1146 print_specific_help (unsigned int include_flags
,
1147 unsigned int exclude_flags
,
1148 unsigned int any_flags
,
1149 struct gcc_options
*opts
,
1150 unsigned int lang_mask
)
1152 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1153 const char * description
= NULL
;
1154 const char * descrip_extra
= "";
1158 /* Sanity check: Make sure that we do not have more
1159 languages than we have bits available to enumerate them. */
1160 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1162 /* If we have not done so already, obtain
1163 the desired maximum width of the output. */
1164 if (opts
->x_help_columns
== 0)
1168 p
= getenv ("COLUMNS");
1171 int value
= atoi (p
);
1174 opts
->x_help_columns
= value
;
1177 if (opts
->x_help_columns
== 0)
1178 /* Use a reasonable default. */
1179 opts
->x_help_columns
= 80;
1182 /* Decide upon the title for the options that we are going to display. */
1183 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1185 switch (flag
& include_flags
)
1192 description
= _("The following options are target specific");
1195 description
= _("The following options control compiler warning messages");
1197 case CL_OPTIMIZATION
:
1198 description
= _("The following options control optimizations");
1201 description
= _("The following options are language-independent");
1204 description
= _("The --param option recognizes the following as parameters");
1207 if (i
>= cl_lang_count
)
1209 if (exclude_flags
& all_langs_mask
)
1210 description
= _("The following options are specific to just the language ");
1212 description
= _("The following options are supported by the language ");
1213 descrip_extra
= lang_names
[i
];
1218 if (description
== NULL
)
1222 if (include_flags
& CL_UNDOCUMENTED
)
1223 description
= _("The following options are not documented");
1224 else if (include_flags
& CL_SEPARATE
)
1225 description
= _("The following options take separate arguments");
1226 else if (include_flags
& CL_JOINED
)
1227 description
= _("The following options take joined arguments");
1230 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1237 if (any_flags
& all_langs_mask
)
1238 description
= _("The following options are language-related");
1240 description
= _("The following options are language-independent");
1244 printf ("%s%s:\n", description
, descrip_extra
);
1245 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1246 opts
->x_help_columns
, opts
, lang_mask
);
1250 /* Check the command line OPTIONS passed to
1251 -fpmu-profile-generate. Return 0 if the options are valid, non-zero
1255 check_pmu_profile_options (const char *options
)
1257 if (strcmp(options
, "load-latency") &&
1258 strcmp(options
, "load-latency-verbose") &&
1259 strcmp(options
, "branch-mispredict") &&
1260 strcmp(options
, "branch-mispredict-verbose"))
1266 /* Handle target- and language-independent options. Return zero to
1267 generate an "unknown option" message. Only options that need
1268 extra handling need to be listed here; if you simply want
1269 DECODED->value assigned to a variable, it happens automatically. */
1272 common_handle_option (struct gcc_options
*opts
,
1273 struct gcc_options
*opts_set
,
1274 const struct cl_decoded_option
*decoded
,
1275 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1277 const struct cl_option_handlers
*handlers
,
1278 diagnostic_context
*dc
)
1280 size_t scode
= decoded
->opt_index
;
1281 const char *arg
= decoded
->arg
;
1282 int value
= decoded
->value
;
1283 enum opt_code code
= (enum opt_code
) scode
;
1285 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1290 handle_param (opts
, opts_set
, loc
, arg
);
1295 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1296 unsigned int undoc_mask
;
1299 if (lang_mask
== CL_DRIVER
)
1302 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1305 /* First display any single language specific options. */
1306 for (i
= 0; i
< cl_lang_count
; i
++)
1308 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1310 /* Next display any multi language specific options. */
1311 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1312 /* Then display any remaining, non-language options. */
1313 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1315 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1316 opts
->x_exit_after_options
= true;
1320 case OPT__target_help
:
1321 if (lang_mask
== CL_DRIVER
)
1324 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1325 opts
->x_exit_after_options
= true;
1330 const char * a
= arg
;
1331 unsigned int include_flags
= 0;
1332 /* Note - by default we include undocumented options when listing
1333 specific classes. If you only want to see documented options
1334 then add ",^undocumented" to the --help= option. E.g.:
1336 --help=target,^undocumented */
1337 unsigned int exclude_flags
= 0;
1339 if (lang_mask
== CL_DRIVER
)
1342 /* Walk along the argument string, parsing each word in turn.
1344 arg = [^]{word}[,{arg}]
1345 word = {optimizers|target|warnings|undocumented|
1346 params|common|<language>} */
1351 const char * string
;
1356 { "optimizers", CL_OPTIMIZATION
},
1357 { "target", CL_TARGET
},
1358 { "warnings", CL_WARNING
},
1359 { "undocumented", CL_UNDOCUMENTED
},
1360 { "params", CL_PARAMS
},
1361 { "joined", CL_JOINED
},
1362 { "separate", CL_SEPARATE
},
1363 { "common", CL_COMMON
},
1366 unsigned int * pflags
;
1368 unsigned int lang_flag
, specific_flag
;
1375 pflags
= & exclude_flags
;
1378 pflags
= & include_flags
;
1380 comma
= strchr (a
, ',');
1391 /* Check to see if the string matches an option class name. */
1392 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1393 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1395 specific_flag
= specifics
[i
].flag
;
1399 /* Check to see if the string matches a language name.
1400 Note - we rely upon the alpha-sorted nature of the entries in
1401 the lang_names array, specifically that shorter names appear
1402 before their longer variants. (i.e. C before C++). That way
1403 when we are attempting to match --help=c for example we will
1404 match with C first and not C++. */
1405 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1406 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1408 lang_flag
= 1U << i
;
1412 if (specific_flag
!= 0)
1415 * pflags
|= specific_flag
;
1418 /* The option's argument matches both the start of a
1419 language name and the start of an option class name.
1420 We have a special case for when the user has
1421 specified "--help=c", but otherwise we have to issue
1423 if (strncasecmp (a
, "c", len
) == 0)
1424 * pflags
|= lang_flag
;
1427 "--help argument %q.*s is ambiguous, "
1428 "please be more specific",
1432 else if (lang_flag
!= 0)
1433 * pflags
|= lang_flag
;
1436 "unrecognized argument to --help= option: %q.*s",
1445 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1447 opts
->x_exit_after_options
= true;
1452 if (lang_mask
== CL_DRIVER
)
1455 opts
->x_exit_after_options
= true;
1461 /* Currently handled in a prescan. */
1465 dc
->warning_as_error_requested
= value
;
1469 if (lang_mask
== CL_DRIVER
)
1472 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1473 opts
, opts_set
, loc
, dc
);
1476 case OPT_Wforce_warnings
:
1477 dc
->force_warnings_requested
= value
;
1480 case OPT_Wlarger_than_
:
1481 opts
->x_larger_than_size
= value
;
1482 opts
->x_warn_larger_than
= value
!= -1;
1485 case OPT_Wfatal_errors
:
1486 dc
->fatal_errors
= value
;
1489 case OPT_Wframe_larger_than_
:
1490 opts
->x_frame_larger_than_size
= value
;
1491 opts
->x_warn_frame_larger_than
= value
!= -1;
1495 opts
->x_warn_shadow_local
= value
;
1496 opts
->x_warn_shadow_compatible_local
= value
;
1499 case OPT_Wshadow_local
:
1500 opts
->x_warn_shadow_compatible_local
= value
;
1503 case OPT_Wstack_usage_
:
1504 opts
->x_warn_stack_usage
= value
;
1505 opts
->x_flag_stack_usage_info
= value
!= -1;
1508 case OPT_Wstrict_aliasing
:
1509 set_Wstrict_aliasing (opts
, value
);
1512 case OPT_Wstrict_overflow
:
1513 opts
->x_warn_strict_overflow
= (value
1514 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1518 case OPT_Wsystem_headers
:
1519 dc
->dc_warn_system_headers
= value
;
1523 opts
->x_flag_gen_aux_info
= 1;
1526 case OPT_auxbase_strip
:
1528 char *tmp
= xstrdup (arg
);
1529 strip_off_ending (tmp
, strlen (tmp
));
1531 opts
->x_aux_base_name
= tmp
;
1536 decode_d_option (arg
, opts
, loc
, dc
);
1539 case OPT_fcall_used_
:
1540 case OPT_fcall_saved_
:
1545 case OPT_fdbg_cnt_list
:
1549 case OPT_fdebug_prefix_map_
:
1553 case OPT_fdiagnostics_show_location_
:
1554 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1557 case OPT_fdiagnostics_show_option
:
1558 dc
->show_option_requested
= value
;
1565 case OPT_ffast_math
:
1566 set_fast_math_flags (opts
, value
);
1569 case OPT_funsafe_math_optimizations
:
1570 set_unsafe_math_optimizations_flags (opts
, value
);
1577 case OPT_finline_limit_
:
1578 set_param_value ("max-inline-insns-single", value
/ 2,
1579 opts
->x_param_values
, opts_set
->x_param_values
);
1580 set_param_value ("max-inline-insns-auto", value
/ 2,
1581 opts
->x_param_values
, opts_set
->x_param_values
);
1584 case OPT_finstrument_functions_exclude_function_list_
:
1585 add_comma_separated_to_vector
1586 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1589 case OPT_finstrument_functions_exclude_file_list_
:
1590 add_comma_separated_to_vector
1591 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1594 case OPT_fmessage_length_
:
1595 pp_set_line_maximum_length (dc
->printer
, value
);
1598 case OPT_fopt_info_
:
1599 if (value
< 0 || value
> OPT_INFO_MAX
)
1601 "%d: invalid value for opt_info",
1604 opts
->x_flag_opt_info
= value
;
1607 case OPT_fpack_struct_
:
1608 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1610 "structure alignment must be a small power of two, not %d",
1613 opts
->x_initial_max_fld_align
= value
;
1617 case OPT_fplugin_arg_
:
1621 case OPT_fprofile_use_
:
1622 opts
->x_profile_data_prefix
= xstrdup (arg
);
1623 opts
->x_flag_profile_use
= true;
1625 /* No break here - do -fprofile-use processing. */
1626 case OPT_fprofile_use
:
1627 if (!opts_set
->x_flag_branch_probabilities
)
1628 opts
->x_flag_branch_probabilities
= value
;
1629 if (!opts_set
->x_flag_profile_values
)
1630 opts
->x_flag_profile_values
= value
;
1631 if (!opts_set
->x_flag_unroll_loops
)
1632 opts
->x_flag_unroll_loops
= value
;
1633 if (!opts_set
->x_flag_peel_loops
)
1634 opts
->x_flag_peel_loops
= value
;
1635 if (!opts_set
->x_flag_value_profile_transformations
)
1636 opts
->x_flag_value_profile_transformations
= value
;
1637 if (!opts_set
->x_flag_inline_functions
)
1638 opts
->x_flag_inline_functions
= value
;
1639 if (!opts_set
->x_flag_ipa_cp
)
1640 opts
->x_flag_ipa_cp
= value
;
1641 if (!opts_set
->x_flag_ipa_cp_clone
1642 && value
&& opts
->x_flag_ipa_cp
)
1643 opts
->x_flag_ipa_cp_clone
= value
;
1644 if (!opts_set
->x_flag_predictive_commoning
)
1645 opts
->x_flag_predictive_commoning
= value
;
1646 if (!opts_set
->x_flag_unswitch_loops
)
1647 opts
->x_flag_unswitch_loops
= value
;
1648 if (!opts_set
->x_flag_gcse_after_reload
)
1649 opts
->x_flag_gcse_after_reload
= value
;
1652 case OPT_fprofile_generate_
:
1653 opts
->x_profile_data_prefix
= xstrdup (arg
);
1655 /* No break here - do -fprofile-generate processing. */
1656 case OPT_fprofile_generate
:
1657 if (!opts_set
->x_profile_arc_flag
)
1658 opts
->x_profile_arc_flag
= value
;
1659 if (!opts_set
->x_flag_profile_values
)
1660 opts
->x_flag_profile_values
= value
;
1661 if (!opts_set
->x_flag_value_profile_transformations
)
1662 opts
->x_flag_value_profile_transformations
= value
;
1663 if (!opts_set
->x_flag_inline_functions
)
1664 opts
->x_flag_inline_functions
= value
;
1665 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1666 quadratic. Disable the pass until better memory representation
1668 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1669 opts
->x_flag_ipa_reference
= false;
1672 case OPT_fpmu_profile_generate_
:
1673 /* This should be ideally turned on in conjunction with
1674 -fprofile-dir or -fprofile-generate in order to specify a
1675 profile directory. */
1676 if (check_pmu_profile_options (arg
))
1677 error ("Unrecognized pmu_profile_generate value \"%s\"", arg
);
1678 flag_pmu_profile_generate
= xstrdup (arg
);
1681 case OPT_fripa_inc_path_sub_
:
1682 lipo_inc_path_pattern
= xstrdup (arg
);
1685 case OPT_fshow_column
:
1686 dc
->show_column
= value
;
1689 case OPT_frandom_seed
:
1690 /* The real switch is -fno-random-seed. */
1696 case OPT_frandom_seed_
:
1700 case OPT_ffunction_attribute_list_
:
1704 case OPT_fsched_verbose_
:
1705 #ifdef INSN_SCHEDULING
1706 /* Handled with Var in common.opt. */
1712 case OPT_fsched_stalled_insns_
:
1713 opts
->x_flag_sched_stalled_insns
= value
;
1714 if (opts
->x_flag_sched_stalled_insns
== 0)
1715 opts
->x_flag_sched_stalled_insns
= -1;
1718 case OPT_fsched_stalled_insns_dep_
:
1719 opts
->x_flag_sched_stalled_insns_dep
= value
;
1722 case OPT_fstack_check_
:
1723 if (!strcmp (arg
, "no"))
1724 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1725 else if (!strcmp (arg
, "generic"))
1726 /* This is the old stack checking method. */
1727 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1728 ? FULL_BUILTIN_STACK_CHECK
1729 : GENERIC_STACK_CHECK
;
1730 else if (!strcmp (arg
, "specific"))
1731 /* This is the new stack checking method. */
1732 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1733 ? FULL_BUILTIN_STACK_CHECK
1734 : STACK_CHECK_STATIC_BUILTIN
1735 ? STATIC_BUILTIN_STACK_CHECK
1736 : GENERIC_STACK_CHECK
;
1738 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1741 case OPT_fstack_limit
:
1742 /* The real switch is -fno-stack-limit. */
1748 case OPT_fstack_limit_register_
:
1749 case OPT_fstack_limit_symbol_
:
1753 case OPT_fstack_usage
:
1754 opts
->x_flag_stack_usage
= value
;
1755 opts
->x_flag_stack_usage_info
= value
!= 0;
1758 case OPT_ftree_vectorizer_verbose_
:
1759 vect_set_verbosity_level (opts
, value
);
1763 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1768 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1772 if (value
< 2 || value
> 4)
1773 error_at (loc
, "dwarf version %d is not supported", value
);
1775 opts
->x_dwarf_version
= value
;
1776 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1780 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1785 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1790 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, "", opts
, opts_set
,
1792 /* Clear the debug level to NONE so that a subsequent bare -g will
1793 set it to NORMAL (level 2). If no subsequent option sets the
1794 level explicitly, we will set it to TERSE in finish_options(). */
1795 opts
->x_debug_info_level
= DINFO_LEVEL_NONE
;
1796 opts
->x_generate_debug_line_table
= true;
1800 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1805 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1809 case OPT_pedantic_errors
:
1810 opts
->x_pedantic
= 1;
1811 dc
->pedantic_errors
= 1;
1815 opts
->x_flag_lto
= value
? "" : NULL
;
1819 dc
->dc_inhibit_warnings
= true;
1822 case OPT_fmax_errors_
:
1823 dc
->max_errors
= value
;
1827 case OPT_fuse_linker_plugin
:
1828 /* No-op. Used by the driver and passed to us because it starts with f. */
1831 case OPT_Wuninitialized
:
1832 /* Also turn on maybe uninitialized warning. */
1833 opts
->x_warn_maybe_uninitialized
= value
;
1837 /* If the flag was handled in a standard way, assume the lack of
1838 processing here is intentional. */
1839 gcc_assert (option_flag_var (scode
, opts
));
1846 /* Handle --param NAME=VALUE. */
1848 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1849 location_t loc
, const char *carg
)
1854 arg
= xstrdup (carg
);
1855 equal
= strchr (arg
, '=');
1857 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1861 value
= integral_argument (equal
+ 1);
1863 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1867 set_param_value (arg
, value
,
1868 opts
->x_param_values
, opts_set
->x_param_values
);
1875 /* Used to set the level of strict aliasing warnings in OPTS,
1876 when no level is specified (i.e., when -Wstrict-aliasing, and not
1877 -Wstrict-aliasing=level was given).
1878 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1879 and 0 otherwise. After calling this function, wstrict_aliasing will be
1880 set to the default value of -Wstrict_aliasing=level, currently 3. */
1882 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1884 gcc_assert (onoff
== 0 || onoff
== 1);
1886 opts
->x_warn_strict_aliasing
= 3;
1888 opts
->x_warn_strict_aliasing
= 0;
1891 /* The following routines are useful in setting all the flags that
1892 -ffast-math and -fno-fast-math imply. */
1894 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1896 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1898 opts
->x_flag_unsafe_math_optimizations
= set
;
1899 set_unsafe_math_optimizations_flags (opts
, set
);
1901 if (!opts
->frontend_set_flag_finite_math_only
)
1902 opts
->x_flag_finite_math_only
= set
;
1903 if (!opts
->frontend_set_flag_errno_math
)
1904 opts
->x_flag_errno_math
= !set
;
1907 if (!opts
->frontend_set_flag_signaling_nans
)
1908 opts
->x_flag_signaling_nans
= 0;
1909 if (!opts
->frontend_set_flag_rounding_math
)
1910 opts
->x_flag_rounding_math
= 0;
1911 if (!opts
->frontend_set_flag_cx_limited_range
)
1912 opts
->x_flag_cx_limited_range
= 1;
1916 /* When -funsafe-math-optimizations is set the following
1917 flags are set as well. */
1919 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1921 if (!opts
->frontend_set_flag_trapping_math
)
1922 opts
->x_flag_trapping_math
= !set
;
1923 if (!opts
->frontend_set_flag_signed_zeros
)
1924 opts
->x_flag_signed_zeros
= !set
;
1925 if (!opts
->frontend_set_flag_associative_math
)
1926 opts
->x_flag_associative_math
= set
;
1927 if (!opts
->frontend_set_flag_reciprocal_math
)
1928 opts
->x_flag_reciprocal_math
= set
;
1931 /* Return true iff flags in OPTS are set as if -ffast-math. */
1933 fast_math_flags_set_p (const struct gcc_options
*opts
)
1935 return (!opts
->x_flag_trapping_math
1936 && opts
->x_flag_unsafe_math_optimizations
1937 && opts
->x_flag_finite_math_only
1938 && !opts
->x_flag_signed_zeros
1939 && !opts
->x_flag_errno_math
);
1942 /* Return true iff flags are set as if -ffast-math but using the flags stored
1943 in the struct cl_optimization structure. */
1945 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1947 return (!opt
->x_flag_trapping_math
1948 && opt
->x_flag_unsafe_math_optimizations
1949 && opt
->x_flag_finite_math_only
1950 && !opt
->x_flag_signed_zeros
1951 && !opt
->x_flag_errno_math
);
1954 /* Handle a debug output -g switch for options OPTS
1955 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1956 explicitly), location LOC. EXTENDED is true or false to support
1957 extended output (2 is special and means "-ggdb" was given). */
1959 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1960 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1963 opts
->x_use_gnu_debug_info_extensions
= extended
;
1965 if (type
== NO_DEBUG
)
1967 if (opts
->x_write_symbols
== NO_DEBUG
)
1969 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1973 #ifdef DWARF2_DEBUGGING_INFO
1974 opts
->x_write_symbols
= DWARF2_DEBUG
;
1975 #elif defined DBX_DEBUGGING_INFO
1976 opts
->x_write_symbols
= DBX_DEBUG
;
1980 if (opts
->x_write_symbols
== NO_DEBUG
)
1981 warning_at (loc
, 0, "target system does not support debug output");
1986 /* Does it conflict with an already selected type? */
1987 if (opts_set
->x_write_symbols
!= NO_DEBUG
1988 && opts
->x_write_symbols
!= NO_DEBUG
1989 && type
!= opts
->x_write_symbols
)
1990 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1991 debug_type_names
[type
]);
1992 opts
->x_write_symbols
= type
;
1993 opts_set
->x_write_symbols
= type
;
1996 /* A debug flag without a level defaults to level 2. */
1999 if (!opts
->x_debug_info_level
)
2000 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
2004 int argval
= integral_argument (arg
);
2006 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
2007 else if (argval
> 3)
2008 error_at (loc
, "debug output level %s is too high", arg
);
2010 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
2013 opts
->x_generate_debug_line_table
= (opts
->x_debug_info_level
2014 >= DINFO_LEVEL_NORMAL
);
2017 /* Arrange to dump core on error for diagnostic context DC. (The
2018 regular error message is still printed first, except in the case of
2022 setup_core_dumping (diagnostic_context
*dc
)
2025 signal (SIGABRT
, SIG_DFL
);
2027 #if defined(HAVE_SETRLIMIT)
2030 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
2031 fatal_error ("getting core file size maximum limit: %m");
2032 rlim
.rlim_cur
= rlim
.rlim_max
;
2033 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
2034 fatal_error ("setting core file size limit to maximum: %m");
2037 diagnostic_abort_on_error (dc
);
2040 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2041 diagnostic context DC. */
2044 decode_d_option (const char *arg
, struct gcc_options
*opts
,
2045 location_t loc
, diagnostic_context
*dc
)
2053 opts
->x_flag_debug_asm
= 1;
2056 opts
->x_flag_print_asm_name
= 1;
2059 opts
->x_flag_dump_rtl_in_asm
= 1;
2060 opts
->x_flag_print_asm_name
= 1;
2063 opts
->x_graph_dump_format
= vcg
;
2066 opts
->x_rtl_dump_and_exit
= 1;
2068 case 'D': /* These are handled by the preprocessor. */
2075 setup_core_dumping (dc
);
2078 opts
->x_flag_dump_all_passed
= true;
2082 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2087 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2088 mask LANG_MASK, option handlers HANDLERS) as an error for option
2089 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2090 NULL), location LOC. This is used by -Werror=. */
2093 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2094 const struct cl_option_handlers
*handlers
,
2095 struct gcc_options
*opts
,
2096 struct gcc_options
*opts_set
,
2097 location_t loc
, diagnostic_context
*dc
)
2102 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2103 new_option
[0] = 'W';
2104 strcpy (new_option
+ 1, arg
);
2105 option_index
= find_opt (new_option
, lang_mask
);
2106 if (option_index
== OPT_SPECIAL_unknown
)
2108 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2112 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2114 control_warning_option (option_index
, (int) kind
, value
,
2116 handlers
, opts
, opts_set
, dc
);
2117 if (option_index
== OPT_Wuninitialized
)
2118 enable_warning_as_error ("maybe-uninitialized", value
, lang_mask
,
2119 handlers
, opts
, opts_set
, loc
, dc
);
2124 /* Return malloced memory for the name of the option OPTION_INDEX
2125 which enabled a diagnostic (context CONTEXT), originally of type
2126 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2130 option_name (diagnostic_context
*context
, int option_index
,
2131 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2135 /* A warning classified as an error. */
2136 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2137 && diag_kind
== DK_ERROR
)
2138 return concat (cl_options
[OPT_Werror_
].opt_text
,
2139 /* Skip over "-W". */
2140 cl_options
[option_index
].opt_text
+ 2,
2142 /* A warning with option. */
2144 return xstrdup (cl_options
[option_index
].opt_text
);
2146 /* A warning without option classified as an error. */
2147 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2148 || diag_kind
== DK_WARNING
)
2150 if (context
->warning_as_error_requested
)
2151 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2153 return xstrdup (_("enabled by default"));