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 /* Indexed by enum debug_info_type. */
41 const char *const debug_type_names
[] =
43 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
46 /* Parse the -femit-struct-debug-detailed option value
47 and set the flag variables. */
49 #define MATCH( prefix, string ) \
50 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
51 ? ((string += sizeof prefix - 1), 1) : 0)
54 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
57 /* various labels for comparison */
58 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
59 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
60 static const char none_lbl
[] = "none", any_lbl
[] = "any";
61 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
63 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
64 /* Default is to apply to as much as possible. */
65 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
69 if (MATCH (dfn_lbl
, spec
))
70 usage
= DINFO_USAGE_DFN
;
71 else if (MATCH (dir_lbl
, spec
))
72 usage
= DINFO_USAGE_DIR_USE
;
73 else if (MATCH (ind_lbl
, spec
))
74 usage
= DINFO_USAGE_IND_USE
;
76 /* Generics or not? */
77 if (MATCH (ord_lbl
, spec
))
79 else if (MATCH (gen_lbl
, spec
))
82 /* What allowable environment? */
83 if (MATCH (none_lbl
, spec
))
84 files
= DINFO_STRUCT_FILE_NONE
;
85 else if (MATCH (any_lbl
, spec
))
86 files
= DINFO_STRUCT_FILE_ANY
;
87 else if (MATCH (sys_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_SYS
;
89 else if (MATCH (base_lbl
, spec
))
90 files
= DINFO_STRUCT_FILE_BASE
;
93 "argument %qs to %<-femit-struct-debug-detailed%> "
97 /* Effect the specification. */
98 if (usage
== DINFO_USAGE_NUM_ENUMS
)
102 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
103 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
104 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
108 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
109 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
110 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
116 opts
->x_debug_struct_ordinary
[usage
] = files
;
118 opts
->x_debug_struct_generic
[usage
] = files
;
122 set_struct_debug_option (opts
, loc
, spec
+1);
125 /* No more -femit-struct-debug-detailed specifications.
129 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
131 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
132 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
133 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
134 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
136 "%<-femit-struct-debug-detailed=dir:...%> must allow "
137 "at least as much as "
138 "%<-femit-struct-debug-detailed=ind:...%>");
142 /* Strip off a legitimate source ending from the input string NAME of
143 length LEN. Rather than having to know the names used by all of
144 our front ends, we strip off an ending of a period followed by
145 up to five characters. (Java uses ".class".) */
148 strip_off_ending (char *name
, int len
)
151 for (i
= 2; i
< 6 && len
> i
; i
++)
153 if (name
[len
- i
] == '.')
155 name
[len
- i
] = '\0';
161 /* Find the base name of a path, stripping off both directories and
162 a single final extension. */
164 base_of_path (const char *path
, const char **base_out
)
166 const char *base
= path
;
168 const char *p
= path
;
172 if (IS_DIR_SEPARATOR(c
))
187 /* What to print when a switch has no documentation. */
188 static const char undocumented_msg
[] = N_("This switch lacks documentation");
190 typedef char *char_p
; /* For DEF_VEC_P. */
192 DEF_VEC_ALLOC_P(char_p
,heap
);
194 static void handle_param (struct gcc_options
*opts
,
195 struct gcc_options
*opts_set
, location_t loc
,
197 static void set_debug_level (enum debug_info_type type
, int extended
,
198 const char *arg
, struct gcc_options
*opts
,
199 struct gcc_options
*opts_set
,
201 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
202 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
203 location_t loc
, diagnostic_context
*dc
);
204 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
206 static void enable_warning_as_error (const char *arg
, int value
,
207 unsigned int lang_mask
,
208 const struct cl_option_handlers
*handlers
,
209 struct gcc_options
*opts
,
210 struct gcc_options
*opts_set
,
212 diagnostic_context
*dc
);
214 /* Handle a back-end option; arguments and return value as for
218 target_handle_option (struct gcc_options
*opts
,
219 struct gcc_options
*opts_set
,
220 const struct cl_decoded_option
*decoded
,
221 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
223 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
224 diagnostic_context
*dc
)
226 gcc_assert (dc
== global_dc
);
227 gcc_assert (kind
== DK_UNSPECIFIED
);
228 return targetm_common
.handle_option (opts
, opts_set
, decoded
, loc
);
231 /* Add comma-separated strings to a char_p vector. */
234 add_comma_separated_to_vector (void **pvec
, const char *arg
)
240 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
242 /* We never free this string. */
255 VEC_safe_push (char_p
, heap
, vec
, token_start
);
258 if (*r
== '\\' && r
[1] == ',')
266 if (*token_start
!= '\0')
267 VEC_safe_push (char_p
, heap
, vec
, token_start
);
272 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
275 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
277 size_t num_params
= get_num_compiler_params ();
279 *opts
= global_options_init
;
280 memset (opts_set
, 0, sizeof (*opts_set
));
282 opts
->x_param_values
= XNEWVEC (int, num_params
);
283 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
284 init_param_values (opts
->x_param_values
);
286 /* Initialize whether `char' is signed. */
287 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
288 /* Set this to a special "uninitialized" value. The actual default
289 is set after target options have been processed. */
290 opts
->x_flag_short_enums
= 2;
292 /* Initialize target_flags before default_options_optimization
293 so the latter can modify it. */
294 opts
->x_target_flags
= targetm_common
.default_target_flags
;
296 /* Some targets have ABI-specified unwind tables. */
297 opts
->x_flag_unwind_tables
= targetm_common
.unwind_tables_default
;
299 /* Some targets have other target-specific initialization. */
300 targetm_common
.option_init_struct (opts
);
303 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
304 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
305 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
306 mask LANG_MASK and option handlers HANDLERS. */
309 maybe_default_option (struct gcc_options
*opts
,
310 struct gcc_options
*opts_set
,
311 const struct default_options
*default_opt
,
312 int level
, bool size
, bool fast
, bool debug
,
313 unsigned int lang_mask
,
314 const struct cl_option_handlers
*handlers
,
316 diagnostic_context
*dc
)
318 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
322 gcc_assert (level
== 2);
324 gcc_assert (level
== 3);
326 gcc_assert (level
== 1);
328 switch (default_opt
->levels
)
334 case OPT_LEVELS_0_ONLY
:
335 enabled
= (level
== 0);
338 case OPT_LEVELS_1_PLUS
:
339 enabled
= (level
>= 1);
342 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
343 enabled
= (level
>= 1 && !size
&& !debug
);
346 case OPT_LEVELS_1_PLUS_NOT_DEBUG
:
347 enabled
= (level
>= 1 && !debug
);
350 case OPT_LEVELS_2_PLUS
:
351 enabled
= (level
>= 2);
354 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
355 enabled
= (level
>= 2 && !size
&& !debug
);
358 case OPT_LEVELS_3_PLUS
:
359 enabled
= (level
>= 3);
362 case OPT_LEVELS_3_PLUS_AND_SIZE
:
363 enabled
= (level
>= 3 || size
);
366 case OPT_LEVELS_SIZE
:
370 case OPT_LEVELS_FAST
:
374 case OPT_LEVELS_NONE
:
380 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
381 default_opt
->arg
, default_opt
->value
,
382 lang_mask
, DK_UNSPECIFIED
, loc
,
384 else if (default_opt
->arg
== NULL
385 && !option
->cl_reject_negative
)
386 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
387 default_opt
->arg
, !default_opt
->value
,
388 lang_mask
, DK_UNSPECIFIED
, loc
,
392 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
393 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
394 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
395 language mask LANG_MASK and option handlers HANDLERS. */
398 maybe_default_options (struct gcc_options
*opts
,
399 struct gcc_options
*opts_set
,
400 const struct default_options
*default_opts
,
401 int level
, bool size
, bool fast
, bool debug
,
402 unsigned int lang_mask
,
403 const struct cl_option_handlers
*handlers
,
405 diagnostic_context
*dc
)
409 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
410 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
411 level
, size
, fast
, debug
,
412 lang_mask
, handlers
, loc
, dc
);
415 /* Table of options enabled by default at different levels. */
417 static const struct default_options default_options_table
[] =
419 /* -O1 optimizations. */
420 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
422 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
424 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
425 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
427 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_fshrink_wrap
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_ftree_sra
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_slsr
, NULL
, 1 },
451 /* -O2 optimizations. */
452 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
453 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
454 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
455 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
456 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
457 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
461 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
464 #ifdef INSN_SCHEDULING
465 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
466 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_ftree_tail_merge
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_foptimize_strlen
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fhoist_adjacent_loads
, NULL
, 1 },
489 /* -O3 optimizations. */
490 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
491 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
492 /* Inlining of functions reducing size is a good idea with -Os
493 regardless of them being declared inline. */
494 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
495 { OPT_LEVELS_1_PLUS_NOT_DEBUG
, OPT_finline_functions_called_once
, NULL
, 1 },
496 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
497 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
498 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
499 { OPT_LEVELS_3_PLUS
, OPT_fvect_cost_model
, NULL
, 1 },
500 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
501 { OPT_LEVELS_3_PLUS
, OPT_ftree_partial_pre
, 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;
537 opts
->x_optimize_debug
= 0;
541 const int optimize_val
= integral_argument (opt
->arg
);
542 if (optimize_val
== -1)
544 "argument to %qs should be a non-negative integer",
548 opts
->x_optimize
= optimize_val
;
549 if ((unsigned int) opts
->x_optimize
> 255)
550 opts
->x_optimize
= 255;
551 opts
->x_optimize_size
= 0;
552 opts
->x_optimize_fast
= 0;
553 opts
->x_optimize_debug
= 0;
559 opts
->x_optimize_size
= 1;
561 /* Optimizing for size forces optimize to be 2. */
562 opts
->x_optimize
= 2;
563 opts
->x_optimize_fast
= 0;
564 opts
->x_optimize_debug
= 0;
568 /* -Ofast only adds flags to -O3. */
569 opts
->x_optimize_size
= 0;
570 opts
->x_optimize
= 3;
571 opts
->x_optimize_fast
= 1;
572 opts
->x_optimize_debug
= 0;
576 /* -Og selects optimization level 1. */
577 opts
->x_optimize_size
= 0;
578 opts
->x_optimize
= 1;
579 opts
->x_optimize_fast
= 0;
580 opts
->x_optimize_debug
= 1;
584 /* Ignore other options in this prescan. */
589 maybe_default_options (opts
, opts_set
, default_options_table
,
590 opts
->x_optimize
, opts
->x_optimize_size
,
591 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
592 lang_mask
, handlers
, loc
, dc
);
594 /* -O2 param settings. */
595 opt2
= (opts
->x_optimize
>= 2);
597 /* Track fields in field-sensitive alias analysis. */
598 maybe_set_param_value
599 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
600 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
601 opts
->x_param_values
, opts_set
->x_param_values
);
603 /* For -O1 only do loop invariant motion for very small loops. */
604 maybe_set_param_value
605 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
606 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
607 opts
->x_param_values
, opts_set
->x_param_values
);
609 if (opts
->x_optimize_size
)
610 /* We want to crossjump as much as possible. */
611 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
612 opts
->x_param_values
, opts_set
->x_param_values
);
614 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
615 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
616 opts
->x_param_values
, opts_set
->x_param_values
);
618 /* Allow default optimizations to be specified on a per-machine basis. */
619 maybe_default_options (opts
, opts_set
,
620 targetm_common
.option_optimization_table
,
621 opts
->x_optimize
, opts
->x_optimize_size
,
622 opts
->x_optimize_fast
, opts
->x_optimize_debug
,
623 lang_mask
, handlers
, loc
, dc
);
626 /* After all options at LOC have been read into OPTS and OPTS_SET,
627 finalize settings of those options and diagnose incompatible
630 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
633 enum unwind_info_type ui_except
;
635 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
637 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
638 OPTS->X_DUMP_DIR_NAME directory. Then try to make
639 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
640 directory, typically the directory to contain the object
642 if (opts
->x_dump_dir_name
)
643 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
644 opts
->x_dump_base_name
, NULL
);
645 else if (opts
->x_aux_base_name
646 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
648 const char *aux_base
;
650 base_of_path (opts
->x_aux_base_name
, &aux_base
);
651 if (opts
->x_aux_base_name
!= aux_base
)
653 int dir_len
= aux_base
- opts
->x_aux_base_name
;
654 char *new_dump_base_name
=
655 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
657 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
658 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
659 /* Append existing OPTS->X_DUMP_BASE_NAME. */
660 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
661 opts
->x_dump_base_name
= new_dump_base_name
;
666 /* Handle related options for unit-at-a-time, toplevel-reorder, and
668 if (!opts
->x_flag_unit_at_a_time
)
670 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
671 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
673 opts
->x_flag_section_anchors
= 0;
674 if (opts
->x_flag_toplevel_reorder
== 1)
675 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
677 opts
->x_flag_toplevel_reorder
= 0;
680 if (opts
->x_flag_tm
&& opts
->x_flag_non_call_exceptions
)
681 sorry ("transactional memory is not supported with non-call exceptions");
683 /* Unless the user has asked for section anchors, we disable toplevel
684 reordering at -O0 to disable transformations that might be surprising
685 to end users and to get -fno-toplevel-reorder tested. */
686 if (!opts
->x_optimize
687 && opts
->x_flag_toplevel_reorder
== 2
688 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
690 opts
->x_flag_toplevel_reorder
= 0;
691 opts
->x_flag_section_anchors
= 0;
693 if (!opts
->x_flag_toplevel_reorder
)
695 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
696 error_at (loc
, "section anchors must be disabled when toplevel reorder"
698 opts
->x_flag_section_anchors
= 0;
701 if (!opts
->x_flag_opts_finished
)
703 if (opts
->x_flag_pie
)
704 opts
->x_flag_pic
= opts
->x_flag_pie
;
705 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
706 opts
->x_flag_shlib
= 1;
707 opts
->x_flag_opts_finished
= true;
710 if (opts
->x_optimize
== 0)
712 /* Inlining does not work if not optimizing,
713 so force it not to be done. */
714 opts
->x_warn_inline
= 0;
715 opts
->x_flag_no_inline
= 1;
718 /* The optimization to partition hot and cold basic blocks into separate
719 sections of the .o and executable files does not work (currently)
720 with exception handling. This is because there is no support for
721 generating unwind info. If opts->x_flag_exceptions is turned on
722 we need to turn off the partitioning optimization. */
724 ui_except
= targetm_common
.except_unwind_info (opts
);
726 if (opts
->x_flag_exceptions
727 && opts
->x_flag_reorder_blocks_and_partition
728 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
731 "-freorder-blocks-and-partition does not work "
732 "with exceptions on this architecture");
733 opts
->x_flag_reorder_blocks_and_partition
= 0;
734 opts
->x_flag_reorder_blocks
= 1;
737 /* If user requested unwind info, then turn off the partitioning
740 if (opts
->x_flag_unwind_tables
741 && !targetm_common
.unwind_tables_default
742 && opts
->x_flag_reorder_blocks_and_partition
743 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))
746 "-freorder-blocks-and-partition does not support "
747 "unwind info on this architecture");
748 opts
->x_flag_reorder_blocks_and_partition
= 0;
749 opts
->x_flag_reorder_blocks
= 1;
752 /* If the target requested unwind info, then turn off the partitioning
753 optimization with a different message. Likewise, if the target does not
754 support named sections. */
756 if (opts
->x_flag_reorder_blocks_and_partition
757 && (!targetm_common
.have_named_sections
758 || (opts
->x_flag_unwind_tables
759 && targetm_common
.unwind_tables_default
760 && (ui_except
== UI_SJLJ
|| ui_except
>= UI_TARGET
))))
763 "-freorder-blocks-and-partition does not work "
764 "on this architecture");
765 opts
->x_flag_reorder_blocks_and_partition
= 0;
766 opts
->x_flag_reorder_blocks
= 1;
769 if (opts
->x_flag_reorder_blocks_and_partition
770 && !opts_set
->x_flag_reorder_functions
)
771 opts
->x_flag_reorder_functions
= 1;
773 /* Pipelining of outer loops is only possible when general pipelining
774 capabilities are requested. */
775 if (!opts
->x_flag_sel_sched_pipelining
)
776 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
778 if (opts
->x_flag_conserve_stack
)
780 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
781 opts
->x_param_values
, opts_set
->x_param_values
);
782 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
783 opts
->x_param_values
, opts_set
->x_param_values
);
786 if (opts
->x_flag_lto
)
789 opts
->x_flag_generate_lto
= 1;
791 /* When generating IL, do not operate in whole-program mode.
792 Otherwise, symbols will be privatized too early, causing link
794 opts
->x_flag_whole_program
= 0;
796 error_at (loc
, "LTO support has not been enabled in this configuration");
798 if (!opts
->x_flag_fat_lto_objects
&& !HAVE_LTO_PLUGIN
)
799 error_at (loc
, "-fno-fat-lto-objects are supported only with linker plugin.");
801 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
802 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
804 if ((opts
->x_flag_lto_partition_balanced
!= 0)
805 + (opts
->x_flag_lto_partition_1to1
!= 0)
806 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
807 error_at (loc
, "only one -flto-partition value can be specified");
810 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
811 default value if they choose based on other options. */
812 if (opts
->x_flag_split_stack
== -1)
813 opts
->x_flag_split_stack
= 0;
814 else if (opts
->x_flag_split_stack
)
816 if (!targetm_common
.supports_split_stack (true, opts
))
818 error_at (loc
, "%<-fsplit-stack%> is not supported by "
819 "this compiler configuration");
820 opts
->x_flag_split_stack
= 0;
824 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
826 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
827 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
828 opts
->x_param_values
, opts_set
->x_param_values
);
830 /* This replaces set_Wunused. */
831 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
832 if (opts
->x_warn_unused_parameter
== -1)
833 opts
->x_warn_unused_parameter
= (opts
->x_warn_unused
834 && opts
->x_extra_warnings
);
835 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
837 if (opts
->x_warn_unused_but_set_parameter
== -1)
838 opts
->x_warn_unused_but_set_parameter
= (opts
->x_warn_unused
839 && opts
->x_extra_warnings
);
840 /* Wunused-local-typedefs is enabled by -Wunused or -Wall. */
841 if (opts
->x_warn_unused_local_typedefs
== -1)
842 opts
->x_warn_unused_local_typedefs
= opts
->x_warn_unused
;
845 #define LEFT_COLUMN 27
847 /* Output ITEM, of length ITEM_WIDTH, in the left column,
848 followed by word-wrapped HELP in a second column. */
850 wrap_help (const char *help
,
852 unsigned int item_width
,
853 unsigned int columns
)
855 unsigned int col_width
= LEFT_COLUMN
;
856 unsigned int remaining
, room
, len
;
858 remaining
= strlen (help
);
862 room
= columns
- 3 - MAX (col_width
, item_width
);
871 for (i
= 0; help
[i
]; i
++)
873 if (i
>= room
&& len
!= remaining
)
877 else if ((help
[i
] == '-' || help
[i
] == '/')
878 && help
[i
+ 1] != ' '
879 && i
> 0 && ISALPHA (help
[i
- 1]))
884 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
886 while (help
[len
] == ' ')
894 /* Print help for a specific front-end, etc. */
896 print_filtered_help (unsigned int include_flags
,
897 unsigned int exclude_flags
,
898 unsigned int any_flags
,
899 unsigned int columns
,
900 struct gcc_options
*opts
,
901 unsigned int lang_mask
)
906 bool displayed
= false;
908 if (include_flags
== CL_PARAMS
)
910 for (i
= 0; i
< LAST_PARAM
; i
++)
912 const char *param
= compiler_params
[i
].option
;
914 help
= compiler_params
[i
].help
;
915 if (help
== NULL
|| *help
== '\0')
917 if (exclude_flags
& CL_UNDOCUMENTED
)
919 help
= undocumented_msg
;
922 /* Get the translation. */
925 wrap_help (help
, param
, strlen (param
), columns
);
931 if (!opts
->x_help_printed
)
932 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
934 if (!opts
->x_help_enum_printed
)
935 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
937 for (i
= 0; i
< cl_options_count
; i
++)
940 const struct cl_option
*option
= cl_options
+ i
;
945 if (include_flags
== 0
946 || ((option
->flags
& include_flags
) != include_flags
))
948 if ((option
->flags
& any_flags
) == 0)
952 /* Skip unwanted switches. */
953 if ((option
->flags
& exclude_flags
) != 0)
956 /* The driver currently prints its own help text. */
957 if ((option
->flags
& CL_DRIVER
) != 0
958 && (option
->flags
& (((1U << cl_lang_count
) - 1)
959 | CL_COMMON
| CL_TARGET
)) == 0)
963 /* Skip switches that have already been printed. */
964 if (opts
->x_help_printed
[i
])
967 opts
->x_help_printed
[i
] = true;
972 if (exclude_flags
& CL_UNDOCUMENTED
)
974 help
= undocumented_msg
;
977 /* Get the translation. */
980 /* Find the gap between the name of the
981 option and its descriptive text. */
982 tab
= strchr (help
, '\t');
991 opt
= option
->opt_text
;
995 /* With the -Q option enabled we change the descriptive text associated
996 with an option to be an indication of its current setting. */
997 if (!opts
->x_quiet_flag
)
999 void *flag_var
= option_flag_var (i
, opts
);
1001 if (len
< (LEFT_COLUMN
+ 2))
1002 strcpy (new_help
, "\t\t");
1004 strcpy (new_help
, "\t");
1006 if (flag_var
!= NULL
1007 && option
->var_type
!= CLVC_DEFER
)
1009 if (option
->flags
& CL_JOINED
)
1011 if (option
->var_type
== CLVC_STRING
)
1013 if (* (const char **) flag_var
!= NULL
)
1014 snprintf (new_help
+ strlen (new_help
),
1015 sizeof (new_help
) - strlen (new_help
),
1016 * (const char **) flag_var
);
1018 else if (option
->var_type
== CLVC_ENUM
)
1020 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1022 const char *arg
= NULL
;
1024 value
= e
->get (flag_var
);
1025 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1027 arg
= _("[default]");
1028 snprintf (new_help
+ strlen (new_help
),
1029 sizeof (new_help
) - strlen (new_help
),
1033 sprintf (new_help
+ strlen (new_help
),
1034 "%#x", * (int *) flag_var
);
1037 strcat (new_help
, option_enabled (i
, opts
)
1038 ? _("[enabled]") : _("[disabled]"));
1044 wrap_help (help
, opt
, len
, columns
);
1047 if (option
->var_type
== CLVC_ENUM
1048 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1049 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1054 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1057 printf (_(" No options with the desired characteristics were found\n"));
1062 /* PR 31349: Tell the user how to see all of the
1063 options supported by a specific front end. */
1064 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1065 if ((1U << i
) & langs
)
1066 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1067 lang_names
[i
], lang_names
[i
]);
1071 else if (! displayed
)
1072 printf (_(" All options with the desired characteristics have already been displayed\n"));
1076 /* Print details of enumerated option arguments, if those
1077 enumerations have help text headings provided. If no help text
1078 is provided, presume that the possible values are listed in the
1079 help text for the relevant options. */
1080 for (i
= 0; i
< cl_enums_count
; i
++)
1082 unsigned int j
, pos
;
1084 if (opts
->x_help_enum_printed
[i
] != 1)
1086 if (cl_enums
[i
].help
== NULL
)
1088 printf (" %s\n ", _(cl_enums
[i
].help
));
1090 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1092 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1094 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1096 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1106 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1111 opts
->x_help_enum_printed
[i
] = 2;
1115 /* Display help for a specified type of option.
1116 The options must have ALL of the INCLUDE_FLAGS set
1117 ANY of the flags in the ANY_FLAGS set
1118 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1119 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1121 print_specific_help (unsigned int include_flags
,
1122 unsigned int exclude_flags
,
1123 unsigned int any_flags
,
1124 struct gcc_options
*opts
,
1125 unsigned int lang_mask
)
1127 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1128 const char * description
= NULL
;
1129 const char * descrip_extra
= "";
1133 /* Sanity check: Make sure that we do not have more
1134 languages than we have bits available to enumerate them. */
1135 gcc_assert ((1U << cl_lang_count
) <= CL_MIN_OPTION_CLASS
);
1137 /* If we have not done so already, obtain
1138 the desired maximum width of the output. */
1139 if (opts
->x_help_columns
== 0)
1143 p
= getenv ("COLUMNS");
1146 int value
= atoi (p
);
1149 opts
->x_help_columns
= value
;
1152 if (opts
->x_help_columns
== 0)
1153 /* Use a reasonable default. */
1154 opts
->x_help_columns
= 80;
1157 /* Decide upon the title for the options that we are going to display. */
1158 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1160 switch (flag
& include_flags
)
1167 description
= _("The following options are target specific");
1170 description
= _("The following options control compiler warning messages");
1172 case CL_OPTIMIZATION
:
1173 description
= _("The following options control optimizations");
1176 description
= _("The following options are language-independent");
1179 description
= _("The --param option recognizes the following as parameters");
1182 if (i
>= cl_lang_count
)
1184 if (exclude_flags
& all_langs_mask
)
1185 description
= _("The following options are specific to just the language ");
1187 description
= _("The following options are supported by the language ");
1188 descrip_extra
= lang_names
[i
];
1193 if (description
== NULL
)
1197 if (include_flags
& CL_UNDOCUMENTED
)
1198 description
= _("The following options are not documented");
1199 else if (include_flags
& CL_SEPARATE
)
1200 description
= _("The following options take separate arguments");
1201 else if (include_flags
& CL_JOINED
)
1202 description
= _("The following options take joined arguments");
1205 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1212 if (any_flags
& all_langs_mask
)
1213 description
= _("The following options are language-related");
1215 description
= _("The following options are language-independent");
1219 printf ("%s%s:\n", description
, descrip_extra
);
1220 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1221 opts
->x_help_columns
, opts
, lang_mask
);
1224 /* Handle target- and language-independent options. Return zero to
1225 generate an "unknown option" message. Only options that need
1226 extra handling need to be listed here; if you simply want
1227 DECODED->value assigned to a variable, it happens automatically. */
1230 common_handle_option (struct gcc_options
*opts
,
1231 struct gcc_options
*opts_set
,
1232 const struct cl_decoded_option
*decoded
,
1233 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1235 const struct cl_option_handlers
*handlers
,
1236 diagnostic_context
*dc
)
1238 size_t scode
= decoded
->opt_index
;
1239 const char *arg
= decoded
->arg
;
1240 int value
= decoded
->value
;
1241 enum opt_code code
= (enum opt_code
) scode
;
1243 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1248 handle_param (opts
, opts_set
, loc
, arg
);
1253 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1254 unsigned int undoc_mask
;
1257 if (lang_mask
== CL_DRIVER
)
1260 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1263 /* First display any single language specific options. */
1264 for (i
= 0; i
< cl_lang_count
; i
++)
1266 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1268 /* Next display any multi language specific options. */
1269 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1270 /* Then display any remaining, non-language options. */
1271 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1273 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1274 opts
->x_exit_after_options
= true;
1278 case OPT__target_help
:
1279 if (lang_mask
== CL_DRIVER
)
1282 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1283 opts
->x_exit_after_options
= true;
1288 const char * a
= arg
;
1289 unsigned int include_flags
= 0;
1290 /* Note - by default we include undocumented options when listing
1291 specific classes. If you only want to see documented options
1292 then add ",^undocumented" to the --help= option. E.g.:
1294 --help=target,^undocumented */
1295 unsigned int exclude_flags
= 0;
1297 if (lang_mask
== CL_DRIVER
)
1300 /* Walk along the argument string, parsing each word in turn.
1302 arg = [^]{word}[,{arg}]
1303 word = {optimizers|target|warnings|undocumented|
1304 params|common|<language>} */
1309 const char * string
;
1314 { "optimizers", CL_OPTIMIZATION
},
1315 { "target", CL_TARGET
},
1316 { "warnings", CL_WARNING
},
1317 { "undocumented", CL_UNDOCUMENTED
},
1318 { "params", CL_PARAMS
},
1319 { "joined", CL_JOINED
},
1320 { "separate", CL_SEPARATE
},
1321 { "common", CL_COMMON
},
1324 unsigned int * pflags
;
1326 unsigned int lang_flag
, specific_flag
;
1333 pflags
= & exclude_flags
;
1336 pflags
= & include_flags
;
1338 comma
= strchr (a
, ',');
1349 /* Check to see if the string matches an option class name. */
1350 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1351 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1353 specific_flag
= specifics
[i
].flag
;
1357 /* Check to see if the string matches a language name.
1358 Note - we rely upon the alpha-sorted nature of the entries in
1359 the lang_names array, specifically that shorter names appear
1360 before their longer variants. (i.e. C before C++). That way
1361 when we are attempting to match --help=c for example we will
1362 match with C first and not C++. */
1363 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1364 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1366 lang_flag
= 1U << i
;
1370 if (specific_flag
!= 0)
1373 * pflags
|= specific_flag
;
1376 /* The option's argument matches both the start of a
1377 language name and the start of an option class name.
1378 We have a special case for when the user has
1379 specified "--help=c", but otherwise we have to issue
1381 if (strncasecmp (a
, "c", len
) == 0)
1382 * pflags
|= lang_flag
;
1385 "--help argument %q.*s is ambiguous, "
1386 "please be more specific",
1390 else if (lang_flag
!= 0)
1391 * pflags
|= lang_flag
;
1394 "unrecognized argument to --help= option: %q.*s",
1403 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1405 opts
->x_exit_after_options
= true;
1410 if (lang_mask
== CL_DRIVER
)
1413 opts
->x_exit_after_options
= true;
1420 /* Currently handled in a prescan. */
1424 dc
->warning_as_error_requested
= value
;
1428 if (lang_mask
== CL_DRIVER
)
1431 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1432 opts
, opts_set
, loc
, dc
);
1435 case OPT_Wlarger_than_
:
1436 opts
->x_larger_than_size
= value
;
1437 opts
->x_warn_larger_than
= value
!= -1;
1440 case OPT_Wfatal_errors
:
1441 dc
->fatal_errors
= value
;
1444 case OPT_Wframe_larger_than_
:
1445 opts
->x_frame_larger_than_size
= value
;
1446 opts
->x_warn_frame_larger_than
= value
!= -1;
1449 case OPT_Wstack_usage_
:
1450 opts
->x_warn_stack_usage
= value
;
1451 opts
->x_flag_stack_usage_info
= value
!= -1;
1454 case OPT_Wstrict_aliasing
:
1455 set_Wstrict_aliasing (opts
, value
);
1458 case OPT_Wstrict_overflow
:
1459 opts
->x_warn_strict_overflow
= (value
1460 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1464 case OPT_Wsystem_headers
:
1465 dc
->dc_warn_system_headers
= value
;
1469 opts
->x_flag_gen_aux_info
= 1;
1472 case OPT_auxbase_strip
:
1474 char *tmp
= xstrdup (arg
);
1475 strip_off_ending (tmp
, strlen (tmp
));
1477 opts
->x_aux_base_name
= tmp
;
1484 decode_d_option (arg
, opts
, loc
, dc
);
1487 case OPT_fcall_used_
:
1488 case OPT_fcall_saved_
:
1493 case OPT_fdbg_cnt_list
:
1497 case OPT_fdebug_prefix_map_
:
1501 case OPT_fdiagnostics_show_location_
:
1502 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1505 case OPT_fdiagnostics_show_caret
:
1506 dc
->show_caret
= value
;
1509 case OPT_fdiagnostics_show_option
:
1510 dc
->show_option_requested
= value
;
1517 case OPT_ffast_math
:
1518 set_fast_math_flags (opts
, value
);
1521 case OPT_funsafe_math_optimizations
:
1522 set_unsafe_math_optimizations_flags (opts
, value
);
1529 case OPT_finline_limit_
:
1530 set_param_value ("max-inline-insns-single", value
/ 2,
1531 opts
->x_param_values
, opts_set
->x_param_values
);
1532 set_param_value ("max-inline-insns-auto", value
/ 2,
1533 opts
->x_param_values
, opts_set
->x_param_values
);
1536 case OPT_finstrument_functions_exclude_function_list_
:
1537 add_comma_separated_to_vector
1538 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1541 case OPT_finstrument_functions_exclude_file_list_
:
1542 add_comma_separated_to_vector
1543 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1546 case OPT_fmessage_length_
:
1547 pp_set_line_maximum_length (dc
->printer
, value
);
1548 diagnostic_set_caret_max_width (dc
, value
);
1552 case OPT_fopt_info_
:
1556 case OPT_fpack_struct_
:
1557 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1559 "structure alignment must be a small power of two, not %d",
1562 opts
->x_initial_max_fld_align
= value
;
1566 case OPT_fplugin_arg_
:
1570 case OPT_fprofile_use_
:
1571 opts
->x_profile_data_prefix
= xstrdup (arg
);
1572 opts
->x_flag_profile_use
= true;
1574 /* No break here - do -fprofile-use processing. */
1575 case OPT_fprofile_use
:
1576 if (!opts_set
->x_flag_branch_probabilities
)
1577 opts
->x_flag_branch_probabilities
= value
;
1578 if (!opts_set
->x_flag_profile_values
)
1579 opts
->x_flag_profile_values
= value
;
1580 if (!opts_set
->x_flag_unroll_loops
)
1581 opts
->x_flag_unroll_loops
= value
;
1582 if (!opts_set
->x_flag_peel_loops
)
1583 opts
->x_flag_peel_loops
= value
;
1584 if (!opts_set
->x_flag_tracer
)
1585 opts
->x_flag_tracer
= value
;
1586 if (!opts_set
->x_flag_value_profile_transformations
)
1587 opts
->x_flag_value_profile_transformations
= value
;
1588 if (!opts_set
->x_flag_inline_functions
)
1589 opts
->x_flag_inline_functions
= value
;
1590 if (!opts_set
->x_flag_ipa_cp
)
1591 opts
->x_flag_ipa_cp
= value
;
1592 if (!opts_set
->x_flag_ipa_cp_clone
1593 && value
&& opts
->x_flag_ipa_cp
)
1594 opts
->x_flag_ipa_cp_clone
= value
;
1595 if (!opts_set
->x_flag_predictive_commoning
)
1596 opts
->x_flag_predictive_commoning
= value
;
1597 if (!opts_set
->x_flag_unswitch_loops
)
1598 opts
->x_flag_unswitch_loops
= value
;
1599 if (!opts_set
->x_flag_gcse_after_reload
)
1600 opts
->x_flag_gcse_after_reload
= value
;
1603 case OPT_fprofile_generate_
:
1604 opts
->x_profile_data_prefix
= xstrdup (arg
);
1606 /* No break here - do -fprofile-generate processing. */
1607 case OPT_fprofile_generate
:
1608 if (!opts_set
->x_profile_arc_flag
)
1609 opts
->x_profile_arc_flag
= value
;
1610 if (!opts_set
->x_flag_profile_values
)
1611 opts
->x_flag_profile_values
= value
;
1612 if (!opts_set
->x_flag_inline_functions
)
1613 opts
->x_flag_inline_functions
= value
;
1614 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1615 quadratic. Disable the pass until better memory representation
1617 if (!opts_set
->x_flag_ipa_reference
&& opts
->x_in_lto_p
)
1618 opts
->x_flag_ipa_reference
= false;
1621 case OPT_fshow_column
:
1622 dc
->show_column
= value
;
1625 case OPT_frandom_seed
:
1626 /* The real switch is -fno-random-seed. */
1632 case OPT_frandom_seed_
:
1636 case OPT_fsched_verbose_
:
1637 #ifdef INSN_SCHEDULING
1638 /* Handled with Var in common.opt. */
1644 case OPT_fsched_stalled_insns_
:
1645 opts
->x_flag_sched_stalled_insns
= value
;
1646 if (opts
->x_flag_sched_stalled_insns
== 0)
1647 opts
->x_flag_sched_stalled_insns
= -1;
1650 case OPT_fsched_stalled_insns_dep_
:
1651 opts
->x_flag_sched_stalled_insns_dep
= value
;
1654 case OPT_fstack_check_
:
1655 if (!strcmp (arg
, "no"))
1656 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1657 else if (!strcmp (arg
, "generic"))
1658 /* This is the old stack checking method. */
1659 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1660 ? FULL_BUILTIN_STACK_CHECK
1661 : GENERIC_STACK_CHECK
;
1662 else if (!strcmp (arg
, "specific"))
1663 /* This is the new stack checking method. */
1664 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1665 ? FULL_BUILTIN_STACK_CHECK
1666 : STACK_CHECK_STATIC_BUILTIN
1667 ? STATIC_BUILTIN_STACK_CHECK
1668 : GENERIC_STACK_CHECK
;
1670 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1673 case OPT_fstack_limit
:
1674 /* The real switch is -fno-stack-limit. */
1680 case OPT_fstack_limit_register_
:
1681 case OPT_fstack_limit_symbol_
:
1685 case OPT_fstack_usage
:
1686 opts
->x_flag_stack_usage
= value
;
1687 opts
->x_flag_stack_usage_info
= value
!= 0;
1690 case OPT_ftree_vectorizer_verbose_
:
1691 /* -ftree-vectorizer-verbose is deprecated. It is defined in
1692 -terms of fopt-info=N. */
1697 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1702 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1706 if (value
< 2 || value
> 4)
1707 error_at (loc
, "dwarf version %d is not supported", value
);
1709 opts
->x_dwarf_version
= value
;
1710 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1714 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1719 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1724 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1729 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1733 case OPT_pedantic_errors
:
1734 dc
->pedantic_errors
= 1;
1735 control_warning_option (OPT_Wpedantic
, DK_ERROR
, value
,
1737 handlers
, opts
, opts_set
,
1742 opts
->x_flag_lto
= value
? "" : NULL
;
1746 dc
->dc_inhibit_warnings
= true;
1749 case OPT_fmax_errors_
:
1750 dc
->max_errors
= value
;
1753 case OPT_fuse_linker_plugin
:
1754 /* No-op. Used by the driver and passed to us because it starts with f.*/
1758 /* If the flag was handled in a standard way, assume the lack of
1759 processing here is intentional. */
1760 gcc_assert (option_flag_var (scode
, opts
));
1764 common_handle_option_auto (opts
, opts_set
, decoded
, lang_mask
, kind
,
1769 /* Handle --param NAME=VALUE. */
1771 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1772 location_t loc
, const char *carg
)
1777 arg
= xstrdup (carg
);
1778 equal
= strchr (arg
, '=');
1780 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1784 value
= integral_argument (equal
+ 1);
1786 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1790 set_param_value (arg
, value
,
1791 opts
->x_param_values
, opts_set
->x_param_values
);
1798 /* Used to set the level of strict aliasing warnings in OPTS,
1799 when no level is specified (i.e., when -Wstrict-aliasing, and not
1800 -Wstrict-aliasing=level was given).
1801 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1802 and 0 otherwise. After calling this function, wstrict_aliasing will be
1803 set to the default value of -Wstrict_aliasing=level, currently 3. */
1805 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1807 gcc_assert (onoff
== 0 || onoff
== 1);
1809 opts
->x_warn_strict_aliasing
= 3;
1811 opts
->x_warn_strict_aliasing
= 0;
1814 /* The following routines are useful in setting all the flags that
1815 -ffast-math and -fno-fast-math imply. */
1817 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1819 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1821 opts
->x_flag_unsafe_math_optimizations
= set
;
1822 set_unsafe_math_optimizations_flags (opts
, set
);
1824 if (!opts
->frontend_set_flag_finite_math_only
)
1825 opts
->x_flag_finite_math_only
= set
;
1826 if (!opts
->frontend_set_flag_errno_math
)
1827 opts
->x_flag_errno_math
= !set
;
1830 if (!opts
->frontend_set_flag_signaling_nans
)
1831 opts
->x_flag_signaling_nans
= 0;
1832 if (!opts
->frontend_set_flag_rounding_math
)
1833 opts
->x_flag_rounding_math
= 0;
1834 if (!opts
->frontend_set_flag_cx_limited_range
)
1835 opts
->x_flag_cx_limited_range
= 1;
1839 /* When -funsafe-math-optimizations is set the following
1840 flags are set as well. */
1842 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1844 if (!opts
->frontend_set_flag_trapping_math
)
1845 opts
->x_flag_trapping_math
= !set
;
1846 if (!opts
->frontend_set_flag_signed_zeros
)
1847 opts
->x_flag_signed_zeros
= !set
;
1848 if (!opts
->frontend_set_flag_associative_math
)
1849 opts
->x_flag_associative_math
= set
;
1850 if (!opts
->frontend_set_flag_reciprocal_math
)
1851 opts
->x_flag_reciprocal_math
= set
;
1854 /* Return true iff flags in OPTS are set as if -ffast-math. */
1856 fast_math_flags_set_p (const struct gcc_options
*opts
)
1858 return (!opts
->x_flag_trapping_math
1859 && opts
->x_flag_unsafe_math_optimizations
1860 && opts
->x_flag_finite_math_only
1861 && !opts
->x_flag_signed_zeros
1862 && !opts
->x_flag_errno_math
);
1865 /* Return true iff flags are set as if -ffast-math but using the flags stored
1866 in the struct cl_optimization structure. */
1868 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1870 return (!opt
->x_flag_trapping_math
1871 && opt
->x_flag_unsafe_math_optimizations
1872 && opt
->x_flag_finite_math_only
1873 && !opt
->x_flag_signed_zeros
1874 && !opt
->x_flag_errno_math
);
1877 /* Handle a debug output -g switch for options OPTS
1878 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1879 explicitly), location LOC. EXTENDED is true or false to support
1880 extended output (2 is special and means "-ggdb" was given). */
1882 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1883 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1886 opts
->x_use_gnu_debug_info_extensions
= extended
;
1888 if (type
== NO_DEBUG
)
1890 if (opts
->x_write_symbols
== NO_DEBUG
)
1892 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1896 #ifdef DWARF2_DEBUGGING_INFO
1897 opts
->x_write_symbols
= DWARF2_DEBUG
;
1898 #elif defined DBX_DEBUGGING_INFO
1899 opts
->x_write_symbols
= DBX_DEBUG
;
1903 if (opts
->x_write_symbols
== NO_DEBUG
)
1904 warning_at (loc
, 0, "target system does not support debug output");
1909 /* Does it conflict with an already selected type? */
1910 if (opts_set
->x_write_symbols
!= NO_DEBUG
1911 && opts
->x_write_symbols
!= NO_DEBUG
1912 && type
!= opts
->x_write_symbols
)
1913 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1914 debug_type_names
[type
]);
1915 opts
->x_write_symbols
= type
;
1916 opts_set
->x_write_symbols
= type
;
1919 /* A debug flag without a level defaults to level 2. */
1922 if (!opts
->x_debug_info_level
)
1923 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1927 int argval
= integral_argument (arg
);
1929 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1930 else if (argval
> 3)
1931 error_at (loc
, "debug output level %s is too high", arg
);
1933 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1937 /* Arrange to dump core on error for diagnostic context DC. (The
1938 regular error message is still printed first, except in the case of
1942 setup_core_dumping (diagnostic_context
*dc
)
1945 signal (SIGABRT
, SIG_DFL
);
1947 #if defined(HAVE_SETRLIMIT)
1950 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1951 fatal_error ("getting core file size maximum limit: %m");
1952 rlim
.rlim_cur
= rlim
.rlim_max
;
1953 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1954 fatal_error ("setting core file size limit to maximum: %m");
1957 diagnostic_abort_on_error (dc
);
1960 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1961 diagnostic context DC. */
1964 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1965 location_t loc
, diagnostic_context
*dc
)
1973 opts
->x_flag_debug_asm
= 1;
1976 opts
->x_flag_print_asm_name
= 1;
1979 opts
->x_flag_dump_rtl_in_asm
= 1;
1980 opts
->x_flag_print_asm_name
= 1;
1983 opts
->x_graph_dump_format
= vcg
;
1986 opts
->x_rtl_dump_and_exit
= 1;
1988 case 'D': /* These are handled by the preprocessor. */
1995 setup_core_dumping (dc
);
1998 opts
->x_flag_dump_all_passed
= true;
2002 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
2007 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2008 mask LANG_MASK, option handlers HANDLERS) as an error for option
2009 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2010 NULL), location LOC. This is used by -Werror=. */
2013 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
2014 const struct cl_option_handlers
*handlers
,
2015 struct gcc_options
*opts
,
2016 struct gcc_options
*opts_set
,
2017 location_t loc
, diagnostic_context
*dc
)
2022 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2023 new_option
[0] = 'W';
2024 strcpy (new_option
+ 1, arg
);
2025 option_index
= find_opt (new_option
, lang_mask
);
2026 if (option_index
== OPT_SPECIAL_unknown
)
2028 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
2032 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2034 control_warning_option (option_index
, (int) kind
, value
,
2036 handlers
, opts
, opts_set
, dc
);
2041 /* Return malloced memory for the name of the option OPTION_INDEX
2042 which enabled a diagnostic (context CONTEXT), originally of type
2043 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2047 option_name (diagnostic_context
*context
, int option_index
,
2048 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2052 /* A warning classified as an error. */
2053 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2054 && diag_kind
== DK_ERROR
)
2055 return concat (cl_options
[OPT_Werror_
].opt_text
,
2056 /* Skip over "-W". */
2057 cl_options
[option_index
].opt_text
+ 2,
2059 /* A warning with option. */
2061 return xstrdup (cl_options
[option_index
].opt_text
);
2063 /* A warning without option classified as an error. */
2064 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2065 || diag_kind
== DK_WARNING
)
2067 if (context
->warning_as_error_requested
)
2068 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2070 return xstrdup (_("enabled by default"));