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" /* Needed by rtl.h and used for STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
29 #include "rtl.h" /* Needed by insn-attr.h. */
34 #include "diagnostic.h"
35 #include "opts-diagnostic.h"
36 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
39 /* Parse the -femit-struct-debug-detailed option value
40 and set the flag variables. */
42 #define MATCH( prefix, string ) \
43 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
44 ? ((string += sizeof prefix - 1), 1) : 0)
47 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
50 /* various labels for comparison */
51 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
52 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
53 static const char none_lbl
[] = "none", any_lbl
[] = "any";
54 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
56 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
57 /* Default is to apply to as much as possible. */
58 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
62 if (MATCH (dfn_lbl
, spec
))
63 usage
= DINFO_USAGE_DFN
;
64 else if (MATCH (dir_lbl
, spec
))
65 usage
= DINFO_USAGE_DIR_USE
;
66 else if (MATCH (ind_lbl
, spec
))
67 usage
= DINFO_USAGE_IND_USE
;
69 /* Generics or not? */
70 if (MATCH (ord_lbl
, spec
))
72 else if (MATCH (gen_lbl
, spec
))
75 /* What allowable environment? */
76 if (MATCH (none_lbl
, spec
))
77 files
= DINFO_STRUCT_FILE_NONE
;
78 else if (MATCH (any_lbl
, spec
))
79 files
= DINFO_STRUCT_FILE_ANY
;
80 else if (MATCH (sys_lbl
, spec
))
81 files
= DINFO_STRUCT_FILE_SYS
;
82 else if (MATCH (base_lbl
, spec
))
83 files
= DINFO_STRUCT_FILE_BASE
;
86 "argument %qs to %<-femit-struct-debug-detailed%> "
90 /* Effect the specification. */
91 if (usage
== DINFO_USAGE_NUM_ENUMS
)
95 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
96 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
97 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
101 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
102 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
103 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
109 opts
->x_debug_struct_ordinary
[usage
] = files
;
111 opts
->x_debug_struct_generic
[usage
] = files
;
115 set_struct_debug_option (opts
, loc
, spec
+1);
118 /* No more -femit-struct-debug-detailed specifications.
122 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
124 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
125 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
126 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
127 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
129 "%<-femit-struct-debug-detailed=dir:...%> must allow "
130 "at least as much as "
131 "%<-femit-struct-debug-detailed=ind:...%>");
135 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
138 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
140 if (val
< MAX_VERBOSITY_LEVEL
)
141 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
143 opts
->x_user_vect_verbosity_level
144 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
148 /* Strip off a legitimate source ending from the input string NAME of
149 length LEN. Rather than having to know the names used by all of
150 our front ends, we strip off an ending of a period followed by
151 up to five characters. (Java uses ".class".) */
154 strip_off_ending (char *name
, int len
)
157 for (i
= 2; i
< 6 && len
> i
; i
++)
159 if (name
[len
- i
] == '.')
161 name
[len
- i
] = '\0';
167 /* Find the base name of a path, stripping off both directories and
168 a single final extension. */
170 base_of_path (const char *path
, const char **base_out
)
172 const char *base
= path
;
174 const char *p
= path
;
178 if (IS_DIR_SEPARATOR(c
))
193 /* What to print when a switch has no documentation. */
194 static const char undocumented_msg
[] = N_("This switch lacks documentation");
196 typedef char *char_p
; /* For DEF_VEC_P. */
198 DEF_VEC_ALLOC_P(char_p
,heap
);
200 static void handle_param (struct gcc_options
*opts
,
201 struct gcc_options
*opts_set
, location_t loc
,
203 static void set_debug_level (enum debug_info_type type
, int extended
,
204 const char *arg
, struct gcc_options
*opts
,
205 struct gcc_options
*opts_set
,
207 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
208 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
209 location_t loc
, diagnostic_context
*dc
);
210 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
212 static void enable_warning_as_error (const char *arg
, int value
,
213 unsigned int lang_mask
,
214 const struct cl_option_handlers
*handlers
,
215 struct gcc_options
*opts
,
216 struct gcc_options
*opts_set
,
218 diagnostic_context
*dc
);
220 /* Handle a back-end option; arguments and return value as for
224 target_handle_option (struct gcc_options
*opts
,
225 struct gcc_options
*opts_set
,
226 const struct cl_decoded_option
*decoded
,
227 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
228 location_t loc ATTRIBUTE_UNUSED
,
229 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
230 diagnostic_context
*dc
)
232 gcc_assert (opts
== &global_options
);
233 gcc_assert (opts_set
== &global_options_set
);
234 gcc_assert (dc
== global_dc
);
235 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
236 gcc_assert (kind
== DK_UNSPECIFIED
);
237 /* Although the location is not passed down to
238 targetm.handle_option, do not make assertions about its value;
239 options may come from optimize attributes and having the correct
240 location in the handler is not generally important. */
241 return targetm
.handle_option (decoded
->opt_index
, decoded
->arg
,
245 /* Add comma-separated strings to a char_p vector. */
248 add_comma_separated_to_vector (void **pvec
, const char *arg
)
254 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
256 /* We never free this string. */
269 VEC_safe_push (char_p
, heap
, vec
, token_start
);
272 if (*r
== '\\' && r
[1] == ',')
280 if (*token_start
!= '\0')
281 VEC_safe_push (char_p
, heap
, vec
, token_start
);
286 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
289 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
291 size_t num_params
= get_num_compiler_params ();
293 *opts
= global_options_init
;
294 memset (opts_set
, 0, sizeof (*opts_set
));
296 opts
->x_param_values
= XNEWVEC (int, num_params
);
297 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
298 init_param_values (opts
->x_param_values
);
300 /* Use priority coloring if cover classes is not defined for the
302 if (targetm
.ira_cover_classes
== NULL
)
303 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
305 /* Initialize whether `char' is signed. */
306 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
307 /* Set this to a special "uninitialized" value. The actual default
308 is set after target options have been processed. */
309 opts
->x_flag_short_enums
= 2;
311 /* Initialize target_flags before targetm.target_option.optimization
312 so the latter can modify it. */
313 opts
->x_target_flags
= targetm
.default_target_flags
;
315 /* Some targets have ABI-specified unwind tables. */
316 opts
->x_flag_unwind_tables
= targetm
.unwind_tables_default
;
318 /* Some targets have other target-specific initialization. */
319 targetm
.target_option
.init_struct (opts
);
322 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
323 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
324 OPTS_SET, diagnostic context DC, location LOC, with language mask
325 LANG_MASK and option handlers HANDLERS. */
328 maybe_default_option (struct gcc_options
*opts
,
329 struct gcc_options
*opts_set
,
330 const struct default_options
*default_opt
,
331 int level
, bool size
, bool fast
,
332 unsigned int lang_mask
,
333 const struct cl_option_handlers
*handlers
,
335 diagnostic_context
*dc
)
337 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
341 gcc_assert (level
== 2);
343 gcc_assert (level
== 3);
345 switch (default_opt
->levels
)
351 case OPT_LEVELS_0_ONLY
:
352 enabled
= (level
== 0);
355 case OPT_LEVELS_1_PLUS
:
356 enabled
= (level
>= 1);
359 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
360 enabled
= (level
>= 1 && !size
);
363 case OPT_LEVELS_2_PLUS
:
364 enabled
= (level
>= 2);
367 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
368 enabled
= (level
>= 2 && !size
);
371 case OPT_LEVELS_3_PLUS
:
372 enabled
= (level
>= 3);
375 case OPT_LEVELS_3_PLUS_AND_SIZE
:
376 enabled
= (level
>= 3 || size
);
379 case OPT_LEVELS_SIZE
:
383 case OPT_LEVELS_FAST
:
387 case OPT_LEVELS_NONE
:
393 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
394 default_opt
->arg
, default_opt
->value
,
395 lang_mask
, DK_UNSPECIFIED
, loc
,
397 else if (default_opt
->arg
== NULL
398 && !(option
->flags
& CL_REJECT_NEGATIVE
))
399 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
400 default_opt
->arg
, !default_opt
->value
,
401 lang_mask
, DK_UNSPECIFIED
, loc
,
405 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
406 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
407 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
408 language mask LANG_MASK and option handlers HANDLERS. */
411 maybe_default_options (struct gcc_options
*opts
,
412 struct gcc_options
*opts_set
,
413 const struct default_options
*default_opts
,
414 int level
, bool size
, bool fast
,
415 unsigned int lang_mask
,
416 const struct cl_option_handlers
*handlers
,
418 diagnostic_context
*dc
)
422 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
423 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
424 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
427 /* Table of options enabled by default at different levels. */
429 static const struct default_options default_options_table
[] =
431 /* -O1 optimizations. */
432 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
461 /* -O2 optimizations. */
462 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
474 #ifdef INSN_SCHEDULING
475 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
476 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
494 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
496 /* -O3 optimizations. */
497 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
498 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
499 /* Inlining of functions reducing size is a good idea with -Os
500 regardless of them being declared inline. */
501 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
503 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
504 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
505 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
507 /* -Ofast adds optimizations to -O3. */
508 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
510 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
513 /* Default the options in OPTS and OPTS_SET based on the optimization
514 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
516 default_options_optimization (struct gcc_options
*opts
,
517 struct gcc_options
*opts_set
,
518 struct cl_decoded_option
*decoded_options
,
519 unsigned int decoded_options_count
,
521 unsigned int lang_mask
,
522 const struct cl_option_handlers
*handlers
,
523 diagnostic_context
*dc
)
529 /* Scan to see what optimization level has been specified. That will
530 determine the default value of many flags. */
531 for (i
= 1; i
< decoded_options_count
; i
++)
533 struct cl_decoded_option
*opt
= &decoded_options
[i
];
534 switch (opt
->opt_index
)
537 if (*opt
->arg
== '\0')
539 opts
->x_optimize
= 1;
540 opts
->x_optimize_size
= 0;
545 const int optimize_val
= integral_argument (opt
->arg
);
546 if (optimize_val
== -1)
548 "argument to %qs should be a non-negative integer",
552 opts
->x_optimize
= optimize_val
;
553 if ((unsigned int) opts
->x_optimize
> 255)
554 opts
->x_optimize
= 255;
555 opts
->x_optimize_size
= 0;
562 opts
->x_optimize_size
= 1;
564 /* Optimizing for size forces optimize to be 2. */
565 opts
->x_optimize
= 2;
570 /* -Ofast only adds flags to -O3. */
571 opts
->x_optimize_size
= 0;
572 opts
->x_optimize
= 3;
577 /* Ignore other options in this prescan. */
582 maybe_default_options (opts
, opts_set
, default_options_table
,
583 opts
->x_optimize
, opts
->x_optimize_size
,
584 ofast
, lang_mask
, handlers
, loc
, dc
);
586 /* -O2 param settings. */
587 opt2
= (opts
->x_optimize
>= 2);
589 /* Track fields in field-sensitive alias analysis. */
590 maybe_set_param_value
591 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
592 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
593 opts
->x_param_values
, opts_set
->x_param_values
);
595 /* For -O1 only do loop invariant motion for very small loops. */
596 maybe_set_param_value
597 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
598 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
599 opts
->x_param_values
, opts_set
->x_param_values
);
601 if (opts
->x_optimize_size
)
602 /* We want to crossjump as much as possible. */
603 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
604 opts
->x_param_values
, opts_set
->x_param_values
);
606 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
607 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
608 opts
->x_param_values
, opts_set
->x_param_values
);
610 /* Allow default optimizations to be specified on a per-machine basis. */
611 maybe_default_options (opts
, opts_set
,
612 targetm
.target_option
.optimization_table
,
613 opts
->x_optimize
, opts
->x_optimize_size
,
614 ofast
, lang_mask
, handlers
, loc
, dc
);
617 /* After all options at LOC have been read into OPTS and OPTS_SET,
618 finalize settings of those options and diagnose incompatible
621 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
624 enum unwind_info_type ui_except
;
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 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
672 if (opts
->x_warn_missing_noreturn
)
673 opts
->x_warn_suggest_attribute_noreturn
= true;
675 /* Unless the user has asked for section anchors, we disable toplevel
676 reordering at -O0 to disable transformations that might be surprising
677 to end users and to get -fno-toplevel-reorder tested. */
678 if (!opts
->x_optimize
679 && opts
->x_flag_toplevel_reorder
== 2
680 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
682 opts
->x_flag_toplevel_reorder
= 0;
683 opts
->x_flag_section_anchors
= 0;
685 if (!opts
->x_flag_toplevel_reorder
)
687 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
688 error_at (loc
, "section anchors must be disabled when toplevel reorder"
690 opts
->x_flag_section_anchors
= 0;
693 if (!opts
->x_flag_opts_finished
)
695 if (opts
->x_flag_pie
)
696 opts
->x_flag_pic
= opts
->x_flag_pie
;
697 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
698 opts
->x_flag_shlib
= 1;
699 opts
->x_flag_opts_finished
= true;
702 if (opts
->x_optimize
== 0)
704 /* Inlining does not work if not optimizing,
705 so force it not to be done. */
706 opts
->x_warn_inline
= 0;
707 opts
->x_flag_no_inline
= 1;
710 /* The optimization to partition hot and cold basic blocks into separate
711 sections of the .o and executable files does not work (currently)
712 with exception handling. This is because there is no support for
713 generating unwind info. If opts->x_flag_exceptions is turned on
714 we need to turn off the partitioning optimization. */
716 ui_except
= targetm
.except_unwind_info (opts
);
718 if (opts
->x_flag_exceptions
719 && opts
->x_flag_reorder_blocks_and_partition
720 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
723 "-freorder-blocks-and-partition does not work "
724 "with exceptions on this architecture");
725 opts
->x_flag_reorder_blocks_and_partition
= 0;
726 opts
->x_flag_reorder_blocks
= 1;
729 /* If user requested unwind info, then turn off the partitioning
732 if (opts
->x_flag_unwind_tables
733 && !targetm
.unwind_tables_default
734 && opts
->x_flag_reorder_blocks_and_partition
735 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
738 "-freorder-blocks-and-partition does not support "
739 "unwind info on this architecture");
740 opts
->x_flag_reorder_blocks_and_partition
= 0;
741 opts
->x_flag_reorder_blocks
= 1;
744 /* If the target requested unwind info, then turn off the partitioning
745 optimization with a different message. Likewise, if the target does not
746 support named sections. */
748 if (opts
->x_flag_reorder_blocks_and_partition
749 && (!targetm
.have_named_sections
750 || (opts
->x_flag_unwind_tables
751 && targetm
.unwind_tables_default
752 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
755 "-freorder-blocks-and-partition does not work "
756 "on this architecture");
757 opts
->x_flag_reorder_blocks_and_partition
= 0;
758 opts
->x_flag_reorder_blocks
= 1;
761 if (opts
->x_flag_reorder_blocks_and_partition
762 && !opts_set
->x_flag_reorder_functions
)
763 opts
->x_flag_reorder_functions
= 1;
765 /* Pipelining of outer loops is only possible when general pipelining
766 capabilities are requested. */
767 if (!opts
->x_flag_sel_sched_pipelining
)
768 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
770 if (!targetm
.ira_cover_classes
771 && opts
->x_flag_ira_algorithm
== IRA_ALGORITHM_CB
)
774 "-fira-algorithm=CB does not work on this architecture");
775 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
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
);
785 if (opts
->x_flag_wpa
|| opts
->x_flag_ltrans
)
787 /* These passes are not WHOPR compatible yet. */
788 opts
->x_flag_ipa_pta
= 0;
789 opts
->x_flag_ipa_struct_reorg
= 0;
792 if (opts
->x_flag_lto
)
795 opts
->x_flag_generate_lto
= 1;
797 /* When generating IL, do not operate in whole-program mode.
798 Otherwise, symbols will be privatized too early, causing link
800 opts
->x_flag_whole_program
= 0;
802 error_at (loc
, "LTO support has not been enabled in this configuration");
805 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
806 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
808 if ((opts
->x_flag_lto_partition_balanced
!= 0)
809 + (opts
->x_flag_lto_partition_1to1
!= 0)
810 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
811 error_at (loc
, "only one -flto-partition value can be specified");
814 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
815 default value if they choose based on other options. */
816 if (opts
->x_flag_split_stack
== -1)
817 opts
->x_flag_split_stack
= 0;
818 else if (opts
->x_flag_split_stack
)
820 if (!targetm
.supports_split_stack (true, opts
))
822 error_at (loc
, "%<-fsplit-stack%> is not supported by "
823 "this compiler configuration");
824 opts
->x_flag_split_stack
= 0;
829 #define LEFT_COLUMN 27
831 /* Output ITEM, of length ITEM_WIDTH, in the left column,
832 followed by word-wrapped HELP in a second column. */
834 wrap_help (const char *help
,
836 unsigned int item_width
,
837 unsigned int columns
)
839 unsigned int col_width
= LEFT_COLUMN
;
840 unsigned int remaining
, room
, len
;
842 remaining
= strlen (help
);
846 room
= columns
- 3 - MAX (col_width
, item_width
);
855 for (i
= 0; help
[i
]; i
++)
857 if (i
>= room
&& len
!= remaining
)
861 else if ((help
[i
] == '-' || help
[i
] == '/')
862 && help
[i
+ 1] != ' '
863 && i
> 0 && ISALPHA (help
[i
- 1]))
868 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
870 while (help
[len
] == ' ')
878 /* Print help for a specific front-end, etc. */
880 print_filtered_help (unsigned int include_flags
,
881 unsigned int exclude_flags
,
882 unsigned int any_flags
,
883 unsigned int columns
,
884 struct gcc_options
*opts
,
885 unsigned int lang_mask
)
890 bool displayed
= false;
892 if (include_flags
== CL_PARAMS
)
894 for (i
= 0; i
< LAST_PARAM
; i
++)
896 const char *param
= compiler_params
[i
].option
;
898 help
= compiler_params
[i
].help
;
899 if (help
== NULL
|| *help
== '\0')
901 if (exclude_flags
& CL_UNDOCUMENTED
)
903 help
= undocumented_msg
;
906 /* Get the translation. */
909 wrap_help (help
, param
, strlen (param
), columns
);
915 if (!opts
->x_help_printed
)
916 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
918 if (!opts
->x_help_enum_printed
)
919 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
921 for (i
= 0; i
< cl_options_count
; i
++)
924 const struct cl_option
*option
= cl_options
+ i
;
929 if (include_flags
== 0
930 || ((option
->flags
& include_flags
) != include_flags
))
932 if ((option
->flags
& any_flags
) == 0)
936 /* Skip unwanted switches. */
937 if ((option
->flags
& exclude_flags
) != 0)
940 /* The driver currently prints its own help text. */
941 if ((option
->flags
& CL_DRIVER
) != 0
942 && (option
->flags
& (((1U << cl_lang_count
) - 1)
943 | CL_COMMON
| CL_TARGET
)) == 0)
947 /* Skip switches that have already been printed. */
948 if (opts
->x_help_printed
[i
])
951 opts
->x_help_printed
[i
] = true;
956 if (exclude_flags
& CL_UNDOCUMENTED
)
958 help
= undocumented_msg
;
961 /* Get the translation. */
964 /* Find the gap between the name of the
965 option and its descriptive text. */
966 tab
= strchr (help
, '\t');
975 opt
= option
->opt_text
;
979 /* With the -Q option enabled we change the descriptive text associated
980 with an option to be an indication of its current setting. */
983 void *flag_var
= option_flag_var (i
, opts
);
985 if (len
< (LEFT_COLUMN
+ 2))
986 strcpy (new_help
, "\t\t");
988 strcpy (new_help
, "\t");
991 && option
->var_type
!= CLVC_DEFER
)
993 if (option
->flags
& CL_JOINED
)
995 if (option
->var_type
== CLVC_STRING
)
997 if (* (const char **) flag_var
!= NULL
)
998 snprintf (new_help
+ strlen (new_help
),
999 sizeof (new_help
) - strlen (new_help
),
1000 * (const char **) flag_var
);
1002 else if (option
->var_type
== CLVC_ENUM
)
1004 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1006 const char *arg
= NULL
;
1008 value
= e
->get (flag_var
);
1009 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1011 arg
= _("[default]");
1012 snprintf (new_help
+ strlen (new_help
),
1013 sizeof (new_help
) - strlen (new_help
),
1017 sprintf (new_help
+ strlen (new_help
),
1018 "%#x", * (int *) flag_var
);
1021 strcat (new_help
, option_enabled (i
, opts
)
1022 ? _("[enabled]") : _("[disabled]"));
1028 wrap_help (help
, opt
, len
, columns
);
1031 if (option
->var_type
== CLVC_ENUM
1032 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1033 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1038 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1041 printf (_(" No options with the desired characteristics were found\n"));
1046 /* PR 31349: Tell the user how to see all of the
1047 options supported by a specific front end. */
1048 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1049 if ((1U << i
) & langs
)
1050 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1051 lang_names
[i
], lang_names
[i
]);
1055 else if (! displayed
)
1056 printf (_(" All options with the desired characteristics have already been displayed\n"));
1060 /* Print details of enumerated option arguments, if those
1061 enumerations have help text headings provided. If no help text
1062 is provided, presume that the possible values are listed in the
1063 help text for the relevant options. */
1064 for (i
= 0; i
< cl_enums_count
; i
++)
1066 unsigned int j
, pos
;
1068 if (opts
->x_help_enum_printed
[i
] != 1)
1070 if (cl_enums
[i
].help
== NULL
)
1072 printf (" %s\n ", _(cl_enums
[i
].help
));
1074 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1076 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1078 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1080 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1090 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1095 opts
->x_help_enum_printed
[i
] = 2;
1099 /* Display help for a specified type of option.
1100 The options must have ALL of the INCLUDE_FLAGS set
1101 ANY of the flags in the ANY_FLAGS set
1102 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1103 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1105 print_specific_help (unsigned int include_flags
,
1106 unsigned int exclude_flags
,
1107 unsigned int any_flags
,
1108 struct gcc_options
*opts
,
1109 unsigned int lang_mask
)
1111 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1112 const char * description
= NULL
;
1113 const char * descrip_extra
= "";
1117 /* Sanity check: Make sure that we do not have more
1118 languages than we have bits available to enumerate them. */
1119 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1121 /* If we have not done so already, obtain
1122 the desired maximum width of the output. */
1123 if (opts
->x_help_columns
== 0)
1127 p
= getenv ("COLUMNS");
1130 int value
= atoi (p
);
1133 opts
->x_help_columns
= value
;
1136 if (opts
->x_help_columns
== 0)
1137 /* Use a reasonable default. */
1138 opts
->x_help_columns
= 80;
1141 /* Decide upon the title for the options that we are going to display. */
1142 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1144 switch (flag
& include_flags
)
1151 description
= _("The following options are target specific");
1154 description
= _("The following options control compiler warning messages");
1156 case CL_OPTIMIZATION
:
1157 description
= _("The following options control optimizations");
1160 description
= _("The following options are language-independent");
1163 description
= _("The --param option recognizes the following as parameters");
1166 if (i
>= cl_lang_count
)
1168 if (exclude_flags
& all_langs_mask
)
1169 description
= _("The following options are specific to just the language ");
1171 description
= _("The following options are supported by the language ");
1172 descrip_extra
= lang_names
[i
];
1177 if (description
== NULL
)
1181 if (include_flags
& CL_UNDOCUMENTED
)
1182 description
= _("The following options are not documented");
1183 else if (include_flags
& CL_SEPARATE
)
1184 description
= _("The following options take separate arguments");
1185 else if (include_flags
& CL_JOINED
)
1186 description
= _("The following options take joined arguments");
1189 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1196 if (any_flags
& all_langs_mask
)
1197 description
= _("The following options are language-related");
1199 description
= _("The following options are language-independent");
1203 printf ("%s%s:\n", description
, descrip_extra
);
1204 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1205 opts
->x_help_columns
, opts
, lang_mask
);
1208 /* Handle target- and language-independent options. Return zero to
1209 generate an "unknown option" message. Only options that need
1210 extra handling need to be listed here; if you simply want
1211 DECODED->value assigned to a variable, it happens automatically. */
1214 common_handle_option (struct gcc_options
*opts
,
1215 struct gcc_options
*opts_set
,
1216 const struct cl_decoded_option
*decoded
,
1217 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1219 const struct cl_option_handlers
*handlers
,
1220 diagnostic_context
*dc
)
1222 size_t scode
= decoded
->opt_index
;
1223 const char *arg
= decoded
->arg
;
1224 int value
= decoded
->value
;
1225 enum opt_code code
= (enum opt_code
) scode
;
1227 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1232 handle_param (opts
, opts_set
, loc
, arg
);
1237 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1238 unsigned int undoc_mask
;
1241 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1244 /* First display any single language specific options. */
1245 for (i
= 0; i
< cl_lang_count
; i
++)
1247 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1249 /* Next display any multi language specific options. */
1250 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1251 /* Then display any remaining, non-language options. */
1252 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1254 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1255 opts
->x_exit_after_options
= true;
1259 case OPT__target_help
:
1260 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1261 opts
->x_exit_after_options
= true;
1263 /* Allow the target a chance to give the user some additional information. */
1270 const char * a
= arg
;
1271 unsigned int include_flags
= 0;
1272 /* Note - by default we include undocumented options when listing
1273 specific classes. If you only want to see documented options
1274 then add ",^undocumented" to the --help= option. E.g.:
1276 --help=target,^undocumented */
1277 unsigned int exclude_flags
= 0;
1279 /* Walk along the argument string, parsing each word in turn.
1281 arg = [^]{word}[,{arg}]
1282 word = {optimizers|target|warnings|undocumented|
1283 params|common|<language>} */
1288 const char * string
;
1293 { "optimizers", CL_OPTIMIZATION
},
1294 { "target", CL_TARGET
},
1295 { "warnings", CL_WARNING
},
1296 { "undocumented", CL_UNDOCUMENTED
},
1297 { "params", CL_PARAMS
},
1298 { "joined", CL_JOINED
},
1299 { "separate", CL_SEPARATE
},
1300 { "common", CL_COMMON
},
1303 unsigned int * pflags
;
1305 unsigned int lang_flag
, specific_flag
;
1312 pflags
= & exclude_flags
;
1315 pflags
= & include_flags
;
1317 comma
= strchr (a
, ',');
1328 /* Check to see if the string matches an option class name. */
1329 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1330 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1332 specific_flag
= specifics
[i
].flag
;
1336 /* Check to see if the string matches a language name.
1337 Note - we rely upon the alpha-sorted nature of the entries in
1338 the lang_names array, specifically that shorter names appear
1339 before their longer variants. (i.e. C before C++). That way
1340 when we are attempting to match --help=c for example we will
1341 match with C first and not C++. */
1342 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1343 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1345 lang_flag
= 1U << i
;
1349 if (specific_flag
!= 0)
1352 * pflags
|= specific_flag
;
1355 /* The option's argument matches both the start of a
1356 language name and the start of an option class name.
1357 We have a special case for when the user has
1358 specified "--help=c", but otherwise we have to issue
1360 if (strncasecmp (a
, "c", len
) == 0)
1361 * pflags
|= lang_flag
;
1364 "--help argument %q.*s is ambiguous, "
1365 "please be more specific",
1369 else if (lang_flag
!= 0)
1370 * pflags
|= lang_flag
;
1373 "unrecognized argument to --help= option: %q.*s",
1382 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1384 opts
->x_exit_after_options
= true;
1389 opts
->x_exit_after_options
= true;
1395 /* Currently handled in a prescan. */
1399 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1400 opts
, opts_set
, loc
, dc
);
1403 case OPT_Wlarger_than_
:
1404 opts
->x_larger_than_size
= value
;
1405 opts
->x_warn_larger_than
= value
!= -1;
1408 case OPT_Wfatal_errors
:
1409 dc
->fatal_errors
= value
;
1412 case OPT_Wframe_larger_than_
:
1413 opts
->x_frame_larger_than_size
= value
;
1414 opts
->x_warn_frame_larger_than
= value
!= -1;
1417 case OPT_Wstrict_aliasing
:
1418 set_Wstrict_aliasing (opts
, value
);
1421 case OPT_Wstrict_overflow
:
1422 opts
->x_warn_strict_overflow
= (value
1423 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1427 case OPT_Wsystem_headers
:
1428 dc
->dc_warn_system_headers
= value
;
1432 opts
->x_flag_gen_aux_info
= 1;
1435 case OPT_auxbase_strip
:
1437 char *tmp
= xstrdup (arg
);
1438 strip_off_ending (tmp
, strlen (tmp
));
1440 opts
->x_aux_base_name
= tmp
;
1445 decode_d_option (arg
, opts
, loc
, dc
);
1448 case OPT_fcall_used_
:
1449 case OPT_fcall_saved_
:
1454 case OPT_fdbg_cnt_list
:
1458 case OPT_fdebug_prefix_map_
:
1462 case OPT_fdiagnostics_show_location_
:
1463 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1466 case OPT_fdiagnostics_show_option
:
1467 dc
->show_option_requested
= value
;
1474 case OPT_ffast_math
:
1475 set_fast_math_flags (opts
, value
);
1478 case OPT_funsafe_math_optimizations
:
1479 set_unsafe_math_optimizations_flags (opts
, value
);
1486 case OPT_finline_limit_
:
1487 set_param_value ("max-inline-insns-single", value
/ 2,
1488 opts
->x_param_values
, opts_set
->x_param_values
);
1489 set_param_value ("max-inline-insns-auto", value
/ 2,
1490 opts
->x_param_values
, opts_set
->x_param_values
);
1493 case OPT_finstrument_functions_exclude_function_list_
:
1494 add_comma_separated_to_vector
1495 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1498 case OPT_finstrument_functions_exclude_file_list_
:
1499 add_comma_separated_to_vector
1500 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1503 case OPT_fmessage_length_
:
1504 pp_set_line_maximum_length (dc
->printer
, value
);
1507 case OPT_fpack_struct_
:
1508 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1510 "structure alignment must be a small power of two, not %d",
1513 opts
->x_initial_max_fld_align
= value
;
1517 case OPT_fplugin_arg_
:
1521 case OPT_fprofile_use_
:
1522 opts
->x_profile_data_prefix
= xstrdup (arg
);
1523 opts
->x_flag_profile_use
= true;
1525 /* No break here - do -fprofile-use processing. */
1526 case OPT_fprofile_use
:
1527 if (!opts_set
->x_flag_branch_probabilities
)
1528 opts
->x_flag_branch_probabilities
= value
;
1529 if (!opts_set
->x_flag_profile_values
)
1530 opts
->x_flag_profile_values
= value
;
1531 if (!opts_set
->x_flag_unroll_loops
)
1532 opts
->x_flag_unroll_loops
= value
;
1533 if (!opts_set
->x_flag_peel_loops
)
1534 opts
->x_flag_peel_loops
= value
;
1535 if (!opts_set
->x_flag_tracer
)
1536 opts
->x_flag_tracer
= value
;
1537 if (!opts_set
->x_flag_value_profile_transformations
)
1538 opts
->x_flag_value_profile_transformations
= value
;
1539 if (!opts_set
->x_flag_inline_functions
)
1540 opts
->x_flag_inline_functions
= value
;
1541 if (!opts_set
->x_flag_ipa_cp
)
1542 opts
->x_flag_ipa_cp
= value
;
1543 if (!opts_set
->x_flag_ipa_cp_clone
1544 && value
&& opts
->x_flag_ipa_cp
)
1545 opts
->x_flag_ipa_cp_clone
= value
;
1546 if (!opts_set
->x_flag_predictive_commoning
)
1547 opts
->x_flag_predictive_commoning
= value
;
1548 if (!opts_set
->x_flag_unswitch_loops
)
1549 opts
->x_flag_unswitch_loops
= value
;
1550 if (!opts_set
->x_flag_gcse_after_reload
)
1551 opts
->x_flag_gcse_after_reload
= value
;
1554 case OPT_fprofile_generate_
:
1555 opts
->x_profile_data_prefix
= xstrdup (arg
);
1557 /* No break here - do -fprofile-generate processing. */
1558 case OPT_fprofile_generate
:
1559 if (!opts_set
->x_profile_arc_flag
)
1560 opts
->x_profile_arc_flag
= value
;
1561 if (!opts_set
->x_flag_profile_values
)
1562 opts
->x_flag_profile_values
= value
;
1563 if (!opts_set
->x_flag_value_profile_transformations
)
1564 opts
->x_flag_value_profile_transformations
= value
;
1565 if (!opts_set
->x_flag_inline_functions
)
1566 opts
->x_flag_inline_functions
= value
;
1567 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1568 quadratic. Disable the pass until better memory representation
1570 if (!opts_set
->x_flag_ipa_reference
&& in_lto_p
)
1571 opts
->x_flag_ipa_reference
= false;
1574 case OPT_fshow_column
:
1575 dc
->show_column
= value
;
1578 case OPT_frandom_seed
:
1579 /* The real switch is -fno-random-seed. */
1585 case OPT_frandom_seed_
:
1589 case OPT_fsched_verbose_
:
1590 #ifdef INSN_SCHEDULING
1591 /* Handled with Var in common.opt. */
1597 case OPT_fsched_stalled_insns_
:
1598 opts
->x_flag_sched_stalled_insns
= value
;
1599 if (opts
->x_flag_sched_stalled_insns
== 0)
1600 opts
->x_flag_sched_stalled_insns
= -1;
1603 case OPT_fsched_stalled_insns_dep_
:
1604 opts
->x_flag_sched_stalled_insns_dep
= value
;
1607 case OPT_fstack_check_
:
1608 if (!strcmp (arg
, "no"))
1609 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1610 else if (!strcmp (arg
, "generic"))
1611 /* This is the old stack checking method. */
1612 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1613 ? FULL_BUILTIN_STACK_CHECK
1614 : GENERIC_STACK_CHECK
;
1615 else if (!strcmp (arg
, "specific"))
1616 /* This is the new stack checking method. */
1617 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1618 ? FULL_BUILTIN_STACK_CHECK
1619 : STACK_CHECK_STATIC_BUILTIN
1620 ? STATIC_BUILTIN_STACK_CHECK
1621 : GENERIC_STACK_CHECK
;
1623 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1626 case OPT_fstack_limit
:
1627 /* The real switch is -fno-stack-limit. */
1633 case OPT_fstack_limit_register_
:
1634 case OPT_fstack_limit_symbol_
:
1638 case OPT_ftree_vectorizer_verbose_
:
1639 vect_set_verbosity_level (opts
, value
);
1643 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1648 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1652 if (value
< 2 || value
> 4)
1653 error_at (loc
, "dwarf version %d is not supported", value
);
1655 dwarf_version
= value
;
1656 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1660 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1665 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1670 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1675 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1679 case OPT_pedantic_errors
:
1680 opts
->x_pedantic
= 1;
1681 dc
->pedantic_errors
= 1;
1685 opts
->x_flag_lto
= value
? "" : NULL
;
1689 dc
->dc_inhibit_warnings
= true;
1692 case OPT_fmax_errors_
:
1693 dc
->max_errors
= value
;
1696 case OPT_fuse_linker_plugin
:
1697 /* No-op. Used by the driver and passed to us because it starts with f.*/
1701 /* If the flag was handled in a standard way, assume the lack of
1702 processing here is intentional. */
1703 gcc_assert (option_flag_var (scode
, opts
));
1710 /* Handle --param NAME=VALUE. */
1712 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1713 location_t loc
, const char *carg
)
1718 arg
= xstrdup (carg
);
1719 equal
= strchr (arg
, '=');
1721 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1725 value
= integral_argument (equal
+ 1);
1727 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1731 set_param_value (arg
, value
,
1732 opts
->x_param_values
, opts_set
->x_param_values
);
1739 /* Used to set the level of strict aliasing warnings in OPTS,
1740 when no level is specified (i.e., when -Wstrict-aliasing, and not
1741 -Wstrict-aliasing=level was given).
1742 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1743 and 0 otherwise. After calling this function, wstrict_aliasing will be
1744 set to the default value of -Wstrict_aliasing=level, currently 3. */
1746 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1748 gcc_assert (onoff
== 0 || onoff
== 1);
1750 opts
->x_warn_strict_aliasing
= 3;
1752 opts
->x_warn_strict_aliasing
= 0;
1755 /* The following routines are useful in setting all the flags that
1756 -ffast-math and -fno-fast-math imply. */
1758 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1760 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1762 opts
->x_flag_unsafe_math_optimizations
= set
;
1763 set_unsafe_math_optimizations_flags (opts
, set
);
1765 if (!opts
->frontend_set_flag_finite_math_only
)
1766 opts
->x_flag_finite_math_only
= set
;
1767 if (!opts
->frontend_set_flag_errno_math
)
1768 opts
->x_flag_errno_math
= !set
;
1771 if (!opts
->frontend_set_flag_signaling_nans
)
1772 opts
->x_flag_signaling_nans
= 0;
1773 if (!opts
->frontend_set_flag_rounding_math
)
1774 opts
->x_flag_rounding_math
= 0;
1775 if (!opts
->frontend_set_flag_cx_limited_range
)
1776 opts
->x_flag_cx_limited_range
= 1;
1780 /* When -funsafe-math-optimizations is set the following
1781 flags are set as well. */
1783 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1785 if (!opts
->frontend_set_flag_trapping_math
)
1786 opts
->x_flag_trapping_math
= !set
;
1787 if (!opts
->frontend_set_flag_signed_zeros
)
1788 opts
->x_flag_signed_zeros
= !set
;
1789 if (!opts
->frontend_set_flag_associative_math
)
1790 opts
->x_flag_associative_math
= set
;
1791 if (!opts
->frontend_set_flag_reciprocal_math
)
1792 opts
->x_flag_reciprocal_math
= set
;
1795 /* Return true iff flags in OPTS are set as if -ffast-math. */
1797 fast_math_flags_set_p (const struct gcc_options
*opts
)
1799 return (!opts
->x_flag_trapping_math
1800 && opts
->x_flag_unsafe_math_optimizations
1801 && opts
->x_flag_finite_math_only
1802 && !opts
->x_flag_signed_zeros
1803 && !opts
->x_flag_errno_math
);
1806 /* Return true iff flags are set as if -ffast-math but using the flags stored
1807 in the struct cl_optimization structure. */
1809 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1811 return (!opt
->x_flag_trapping_math
1812 && opt
->x_flag_unsafe_math_optimizations
1813 && opt
->x_flag_finite_math_only
1814 && !opt
->x_flag_signed_zeros
1815 && !opt
->x_flag_errno_math
);
1818 /* Handle a debug output -g switch for options OPTS
1819 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1820 explicitly), location LOC. EXTENDED is true or false to support
1821 extended output (2 is special and means "-ggdb" was given). */
1823 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1824 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1827 opts
->x_use_gnu_debug_info_extensions
= extended
;
1829 if (type
== NO_DEBUG
)
1831 if (opts
->x_write_symbols
== NO_DEBUG
)
1833 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1837 #ifdef DWARF2_DEBUGGING_INFO
1838 opts
->x_write_symbols
= DWARF2_DEBUG
;
1839 #elif defined DBX_DEBUGGING_INFO
1840 opts
->x_write_symbols
= DBX_DEBUG
;
1844 if (opts
->x_write_symbols
== NO_DEBUG
)
1845 warning_at (loc
, 0, "target system does not support debug output");
1850 /* Does it conflict with an already selected type? */
1851 if (opts_set
->x_write_symbols
!= NO_DEBUG
1852 && opts
->x_write_symbols
!= NO_DEBUG
1853 && type
!= opts
->x_write_symbols
)
1854 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1855 debug_type_names
[type
]);
1856 opts
->x_write_symbols
= type
;
1857 opts_set
->x_write_symbols
= type
;
1860 /* A debug flag without a level defaults to level 2. */
1863 if (!opts
->x_debug_info_level
)
1864 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1868 int argval
= integral_argument (arg
);
1870 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1871 else if (argval
> 3)
1872 error_at (loc
, "debug output level %s is too high", arg
);
1874 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1878 /* Arrange to dump core on error for diagnostic context DC. (The
1879 regular error message is still printed first, except in the case of
1883 setup_core_dumping (diagnostic_context
*dc
)
1886 signal (SIGABRT
, SIG_DFL
);
1888 #if defined(HAVE_SETRLIMIT)
1891 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1892 fatal_error ("getting core file size maximum limit: %m");
1893 rlim
.rlim_cur
= rlim
.rlim_max
;
1894 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1895 fatal_error ("setting core file size limit to maximum: %m");
1898 diagnostic_abort_on_error (dc
);
1901 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1902 diagnostic context DC. */
1905 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1906 location_t loc
, diagnostic_context
*dc
)
1914 opts
->x_flag_debug_asm
= 1;
1917 opts
->x_flag_print_asm_name
= 1;
1920 opts
->x_flag_dump_rtl_in_asm
= 1;
1921 opts
->x_flag_print_asm_name
= 1;
1924 opts
->x_graph_dump_format
= vcg
;
1927 opts
->x_rtl_dump_and_exit
= 1;
1929 case 'D': /* These are handled by the preprocessor. */
1936 setup_core_dumping (dc
);
1939 opts
->x_flag_dump_all_passed
= true;
1943 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1948 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1949 mask LANG_MASK, option handlers HANDLERS) as an error for option
1950 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1951 NULL), location LOC. This is used by -Werror=. */
1954 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1955 const struct cl_option_handlers
*handlers
,
1956 struct gcc_options
*opts
,
1957 struct gcc_options
*opts_set
,
1958 location_t loc
, diagnostic_context
*dc
)
1963 new_option
= XNEWVEC (char, strlen (arg
) + 2);
1964 new_option
[0] = 'W';
1965 strcpy (new_option
+ 1, arg
);
1966 option_index
= find_opt (new_option
, lang_mask
);
1967 if (option_index
== OPT_SPECIAL_unknown
)
1969 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
1973 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
1975 control_warning_option (option_index
, (int) kind
, value
,
1977 handlers
, opts
, opts_set
, dc
);
1982 /* Return malloced memory for the name of the option OPTION_INDEX
1983 which enabled a diagnostic (context CONTEXT), originally of type
1984 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1988 option_name (diagnostic_context
*context
, int option_index
,
1989 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
1993 /* A warning classified as an error. */
1994 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
1995 && diag_kind
== DK_ERROR
)
1996 return concat (cl_options
[OPT_Werror_
].opt_text
,
1997 /* Skip over "-W". */
1998 cl_options
[option_index
].opt_text
+ 2,
2000 /* A warning with option. */
2002 return xstrdup (cl_options
[option_index
].opt_text
);
2004 /* A warning without option classified as an error. */
2005 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2006 || diag_kind
== DK_WARNING
)
2008 if (context
->warning_as_error_requested
)
2009 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2011 return xstrdup (_("enabled by default"));