1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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 },
460 /* -O2 optimizations. */
461 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
473 #ifdef INSN_SCHEDULING
474 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
475 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
494 /* -O3 optimizations. */
495 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
496 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
497 /* Inlining of functions reducing size is a good idea with -Os
498 regardless of them being declared inline. */
499 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
500 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
501 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
503 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
505 /* -Ofast adds optimizations to -O3. */
506 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
508 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
511 /* Default the options in OPTS and OPTS_SET based on the optimization
512 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
514 default_options_optimization (struct gcc_options
*opts
,
515 struct gcc_options
*opts_set
,
516 struct cl_decoded_option
*decoded_options
,
517 unsigned int decoded_options_count
,
519 unsigned int lang_mask
,
520 const struct cl_option_handlers
*handlers
,
521 diagnostic_context
*dc
)
527 /* Scan to see what optimization level has been specified. That will
528 determine the default value of many flags. */
529 for (i
= 1; i
< decoded_options_count
; i
++)
531 struct cl_decoded_option
*opt
= &decoded_options
[i
];
532 switch (opt
->opt_index
)
535 if (*opt
->arg
== '\0')
537 opts
->x_optimize
= 1;
538 opts
->x_optimize_size
= 0;
543 const int optimize_val
= integral_argument (opt
->arg
);
544 if (optimize_val
== -1)
546 "argument to %qs should be a non-negative integer",
550 opts
->x_optimize
= optimize_val
;
551 if ((unsigned int) opts
->x_optimize
> 255)
552 opts
->x_optimize
= 255;
553 opts
->x_optimize_size
= 0;
560 opts
->x_optimize_size
= 1;
562 /* Optimizing for size forces optimize to be 2. */
563 opts
->x_optimize
= 2;
568 /* -Ofast only adds flags to -O3. */
569 opts
->x_optimize_size
= 0;
570 opts
->x_optimize
= 3;
575 /* Ignore other options in this prescan. */
580 maybe_default_options (opts
, opts_set
, default_options_table
,
581 opts
->x_optimize
, opts
->x_optimize_size
,
582 ofast
, lang_mask
, handlers
, loc
, dc
);
584 /* -O2 param settings. */
585 opt2
= (opts
->x_optimize
>= 2);
587 /* Track fields in field-sensitive alias analysis. */
588 maybe_set_param_value
589 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
590 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
591 opts
->x_param_values
, opts_set
->x_param_values
);
593 /* For -O1 only do loop invariant motion for very small loops. */
594 maybe_set_param_value
595 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
596 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
597 opts
->x_param_values
, opts_set
->x_param_values
);
599 if (opts
->x_optimize_size
)
600 /* We want to crossjump as much as possible. */
601 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
602 opts
->x_param_values
, opts_set
->x_param_values
);
604 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
605 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
606 opts
->x_param_values
, opts_set
->x_param_values
);
608 /* Allow default optimizations to be specified on a per-machine basis. */
609 maybe_default_options (opts
, opts_set
,
610 targetm
.target_option
.optimization_table
,
611 opts
->x_optimize
, opts
->x_optimize_size
,
612 ofast
, lang_mask
, handlers
, loc
, dc
);
615 /* After all options at LOC have been read into OPTS and OPTS_SET,
616 finalize settings of those options and diagnose incompatible
619 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
622 enum unwind_info_type ui_except
;
624 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
626 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
627 OPTS->X_DUMP_DIR_NAME directory. Then try to make
628 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
629 directory, typically the directory to contain the object
631 if (opts
->x_dump_dir_name
)
632 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
633 opts
->x_dump_base_name
, NULL
);
634 else if (opts
->x_aux_base_name
)
636 const char *aux_base
;
638 base_of_path (opts
->x_aux_base_name
, &aux_base
);
639 if (opts
->x_aux_base_name
!= aux_base
)
641 int dir_len
= aux_base
- opts
->x_aux_base_name
;
642 char *new_dump_base_name
=
643 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
645 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
646 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
647 /* Append existing OPTS->X_DUMP_BASE_NAME. */
648 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
649 opts
->x_dump_base_name
= new_dump_base_name
;
654 /* Handle related options for unit-at-a-time, toplevel-reorder, and
656 if (!opts
->x_flag_unit_at_a_time
)
658 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
659 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
661 opts
->x_flag_section_anchors
= 0;
662 if (opts
->x_flag_toplevel_reorder
== 1)
663 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
665 opts
->x_flag_toplevel_reorder
= 0;
668 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
669 if (opts
->x_warn_missing_noreturn
)
670 opts
->x_warn_suggest_attribute_noreturn
= true;
672 /* Unless the user has asked for section anchors, we disable toplevel
673 reordering at -O0 to disable transformations that might be surprising
674 to end users and to get -fno-toplevel-reorder tested. */
675 if (!opts
->x_optimize
676 && opts
->x_flag_toplevel_reorder
== 2
677 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
679 opts
->x_flag_toplevel_reorder
= 0;
680 opts
->x_flag_section_anchors
= 0;
682 if (!opts
->x_flag_toplevel_reorder
)
684 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
685 error_at (loc
, "section anchors must be disabled when toplevel reorder"
687 opts
->x_flag_section_anchors
= 0;
690 if (!opts
->x_flag_opts_finished
)
692 if (opts
->x_flag_pie
)
693 opts
->x_flag_pic
= opts
->x_flag_pie
;
694 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
695 opts
->x_flag_shlib
= 1;
696 opts
->x_flag_opts_finished
= false;
699 if (opts
->x_optimize
== 0)
701 /* Inlining does not work if not optimizing,
702 so force it not to be done. */
703 opts
->x_warn_inline
= 0;
704 opts
->x_flag_no_inline
= 1;
707 /* The optimization to partition hot and cold basic blocks into separate
708 sections of the .o and executable files does not work (currently)
709 with exception handling. This is because there is no support for
710 generating unwind info. If opts->x_flag_exceptions is turned on
711 we need to turn off the partitioning optimization. */
713 ui_except
= targetm
.except_unwind_info (opts
);
715 if (opts
->x_flag_exceptions
716 && opts
->x_flag_reorder_blocks_and_partition
717 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
720 "-freorder-blocks-and-partition does not work "
721 "with exceptions on this architecture");
722 opts
->x_flag_reorder_blocks_and_partition
= 0;
723 opts
->x_flag_reorder_blocks
= 1;
726 /* If user requested unwind info, then turn off the partitioning
729 if (opts
->x_flag_unwind_tables
730 && !targetm
.unwind_tables_default
731 && opts
->x_flag_reorder_blocks_and_partition
732 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
735 "-freorder-blocks-and-partition does not support "
736 "unwind info on this architecture");
737 opts
->x_flag_reorder_blocks_and_partition
= 0;
738 opts
->x_flag_reorder_blocks
= 1;
741 /* If the target requested unwind info, then turn off the partitioning
742 optimization with a different message. Likewise, if the target does not
743 support named sections. */
745 if (opts
->x_flag_reorder_blocks_and_partition
746 && (!targetm
.have_named_sections
747 || (opts
->x_flag_unwind_tables
748 && targetm
.unwind_tables_default
749 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
752 "-freorder-blocks-and-partition does not work "
753 "on this architecture");
754 opts
->x_flag_reorder_blocks_and_partition
= 0;
755 opts
->x_flag_reorder_blocks
= 1;
758 /* Pipelining of outer loops is only possible when general pipelining
759 capabilities are requested. */
760 if (!opts
->x_flag_sel_sched_pipelining
)
761 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
763 if (!targetm
.ira_cover_classes
764 && opts
->x_flag_ira_algorithm
== IRA_ALGORITHM_CB
)
767 "-fira-algorithm=CB does not work on this architecture");
768 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
771 if (opts
->x_flag_conserve_stack
)
773 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
774 opts
->x_param_values
, opts_set
->x_param_values
);
775 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
776 opts
->x_param_values
, opts_set
->x_param_values
);
778 if (opts
->x_flag_wpa
|| opts
->x_flag_ltrans
)
780 /* These passes are not WHOPR compatible yet. */
781 opts
->x_flag_ipa_pta
= 0;
782 opts
->x_flag_ipa_struct_reorg
= 0;
785 if (opts
->x_flag_lto
)
788 opts
->x_flag_generate_lto
= 1;
790 /* When generating IL, do not operate in whole-program mode.
791 Otherwise, symbols will be privatized too early, causing link
793 opts
->x_flag_whole_program
= 0;
795 error_at (loc
, "LTO support has not been enabled in this configuration");
798 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
799 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
801 if ((opts
->x_flag_lto_partition_balanced
!= 0)
802 + (opts
->x_flag_lto_partition_1to1
!= 0)
803 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
804 error_at (loc
, "only one -flto-partition value can be specified");
807 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
808 default value if they choose based on other options. */
809 if (opts
->x_flag_split_stack
== -1)
810 opts
->x_flag_split_stack
= 0;
811 else if (opts
->x_flag_split_stack
)
813 if (!targetm
.supports_split_stack (true, opts
))
815 error_at (loc
, "%<-fsplit-stack%> is not supported by "
816 "this compiler configuration");
817 opts
->x_flag_split_stack
= 0;
822 #define LEFT_COLUMN 27
824 /* Output ITEM, of length ITEM_WIDTH, in the left column,
825 followed by word-wrapped HELP in a second column. */
827 wrap_help (const char *help
,
829 unsigned int item_width
,
830 unsigned int columns
)
832 unsigned int col_width
= LEFT_COLUMN
;
833 unsigned int remaining
, room
, len
;
835 remaining
= strlen (help
);
839 room
= columns
- 3 - MAX (col_width
, item_width
);
848 for (i
= 0; help
[i
]; i
++)
850 if (i
>= room
&& len
!= remaining
)
854 else if ((help
[i
] == '-' || help
[i
] == '/')
855 && help
[i
+ 1] != ' '
856 && i
> 0 && ISALPHA (help
[i
- 1]))
861 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
863 while (help
[len
] == ' ')
871 /* Print help for a specific front-end, etc. */
873 print_filtered_help (unsigned int include_flags
,
874 unsigned int exclude_flags
,
875 unsigned int any_flags
,
876 unsigned int columns
,
877 struct gcc_options
*opts
,
878 unsigned int lang_mask
)
883 bool displayed
= false;
885 if (include_flags
== CL_PARAMS
)
887 for (i
= 0; i
< LAST_PARAM
; i
++)
889 const char *param
= compiler_params
[i
].option
;
891 help
= compiler_params
[i
].help
;
892 if (help
== NULL
|| *help
== '\0')
894 if (exclude_flags
& CL_UNDOCUMENTED
)
896 help
= undocumented_msg
;
899 /* Get the translation. */
902 wrap_help (help
, param
, strlen (param
), columns
);
908 if (!opts
->x_help_printed
)
909 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
911 if (!opts
->x_help_enum_printed
)
912 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
914 for (i
= 0; i
< cl_options_count
; i
++)
917 const struct cl_option
*option
= cl_options
+ i
;
922 if (include_flags
== 0
923 || ((option
->flags
& include_flags
) != include_flags
))
925 if ((option
->flags
& any_flags
) == 0)
929 /* Skip unwanted switches. */
930 if ((option
->flags
& exclude_flags
) != 0)
933 /* The driver currently prints its own help text. */
934 if ((option
->flags
& CL_DRIVER
) != 0
935 && (option
->flags
& (((1U << cl_lang_count
) - 1)
936 | CL_COMMON
| CL_TARGET
)) == 0)
940 /* Skip switches that have already been printed. */
941 if (opts
->x_help_printed
[i
])
944 opts
->x_help_printed
[i
] = true;
949 if (exclude_flags
& CL_UNDOCUMENTED
)
951 help
= undocumented_msg
;
954 /* Get the translation. */
957 /* Find the gap between the name of the
958 option and its descriptive text. */
959 tab
= strchr (help
, '\t');
968 opt
= option
->opt_text
;
972 /* With the -Q option enabled we change the descriptive text associated
973 with an option to be an indication of its current setting. */
976 void *flag_var
= option_flag_var (i
, opts
);
978 if (len
< (LEFT_COLUMN
+ 2))
979 strcpy (new_help
, "\t\t");
981 strcpy (new_help
, "\t");
984 && option
->var_type
!= CLVC_DEFER
)
986 if (option
->flags
& CL_JOINED
)
988 if (option
->var_type
== CLVC_STRING
)
990 if (* (const char **) flag_var
!= NULL
)
991 snprintf (new_help
+ strlen (new_help
),
992 sizeof (new_help
) - strlen (new_help
),
993 * (const char **) flag_var
);
995 else if (option
->var_type
== CLVC_ENUM
)
997 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
999 const char *arg
= NULL
;
1001 value
= e
->get (flag_var
);
1002 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1004 arg
= _("[default]");
1005 snprintf (new_help
+ strlen (new_help
),
1006 sizeof (new_help
) - strlen (new_help
),
1010 sprintf (new_help
+ strlen (new_help
),
1011 "%#x", * (int *) flag_var
);
1014 strcat (new_help
, option_enabled (i
, opts
)
1015 ? _("[enabled]") : _("[disabled]"));
1021 wrap_help (help
, opt
, len
, columns
);
1024 if (option
->var_type
== CLVC_ENUM
1025 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1026 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1031 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1034 printf (_(" No options with the desired characteristics were found\n"));
1039 /* PR 31349: Tell the user how to see all of the
1040 options supported by a specific front end. */
1041 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1042 if ((1U << i
) & langs
)
1043 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1044 lang_names
[i
], lang_names
[i
]);
1048 else if (! displayed
)
1049 printf (_(" All options with the desired characteristics have already been displayed\n"));
1053 /* Print details of enumerated option arguments, if those
1054 enumerations have help text headings provided. If no help text
1055 is provided, presume that the possible values are listed in the
1056 help text for the relevant options. */
1057 for (i
= 0; i
< cl_enums_count
; i
++)
1059 unsigned int j
, pos
;
1061 if (opts
->x_help_enum_printed
[i
] != 1)
1063 if (cl_enums
[i
].help
== NULL
)
1065 printf (" %s\n ", _(cl_enums
[i
].help
));
1067 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1069 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1071 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1073 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1083 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1088 opts
->x_help_enum_printed
[i
] = 2;
1092 /* Display help for a specified type of option.
1093 The options must have ALL of the INCLUDE_FLAGS set
1094 ANY of the flags in the ANY_FLAGS set
1095 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1096 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1098 print_specific_help (unsigned int include_flags
,
1099 unsigned int exclude_flags
,
1100 unsigned int any_flags
,
1101 struct gcc_options
*opts
,
1102 unsigned int lang_mask
)
1104 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1105 const char * description
= NULL
;
1106 const char * descrip_extra
= "";
1110 /* Sanity check: Make sure that we do not have more
1111 languages than we have bits available to enumerate them. */
1112 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1114 /* If we have not done so already, obtain
1115 the desired maximum width of the output. */
1116 if (opts
->x_help_columns
== 0)
1120 p
= getenv ("COLUMNS");
1123 int value
= atoi (p
);
1126 opts
->x_help_columns
= value
;
1129 if (opts
->x_help_columns
== 0)
1130 /* Use a reasonable default. */
1131 opts
->x_help_columns
= 80;
1134 /* Decide upon the title for the options that we are going to display. */
1135 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1137 switch (flag
& include_flags
)
1144 description
= _("The following options are target specific");
1147 description
= _("The following options control compiler warning messages");
1149 case CL_OPTIMIZATION
:
1150 description
= _("The following options control optimizations");
1153 description
= _("The following options are language-independent");
1156 description
= _("The --param option recognizes the following as parameters");
1159 if (i
>= cl_lang_count
)
1161 if (exclude_flags
& all_langs_mask
)
1162 description
= _("The following options are specific to just the language ");
1164 description
= _("The following options are supported by the language ");
1165 descrip_extra
= lang_names
[i
];
1170 if (description
== NULL
)
1174 if (include_flags
& CL_UNDOCUMENTED
)
1175 description
= _("The following options are not documented");
1176 else if (include_flags
& CL_SEPARATE
)
1177 description
= _("The following options take separate arguments");
1178 else if (include_flags
& CL_JOINED
)
1179 description
= _("The following options take joined arguments");
1182 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1189 if (any_flags
& all_langs_mask
)
1190 description
= _("The following options are language-related");
1192 description
= _("The following options are language-independent");
1196 printf ("%s%s:\n", description
, descrip_extra
);
1197 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1198 opts
->x_help_columns
, opts
, lang_mask
);
1201 /* Handle target- and language-independent options. Return zero to
1202 generate an "unknown option" message. Only options that need
1203 extra handling need to be listed here; if you simply want
1204 DECODED->value assigned to a variable, it happens automatically. */
1207 common_handle_option (struct gcc_options
*opts
,
1208 struct gcc_options
*opts_set
,
1209 const struct cl_decoded_option
*decoded
,
1210 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1212 const struct cl_option_handlers
*handlers
,
1213 diagnostic_context
*dc
)
1215 size_t scode
= decoded
->opt_index
;
1216 const char *arg
= decoded
->arg
;
1217 int value
= decoded
->value
;
1218 enum opt_code code
= (enum opt_code
) scode
;
1220 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1225 handle_param (opts
, opts_set
, loc
, arg
);
1230 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1231 unsigned int undoc_mask
;
1234 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1237 /* First display any single language specific options. */
1238 for (i
= 0; i
< cl_lang_count
; i
++)
1240 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1242 /* Next display any multi language specific options. */
1243 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1244 /* Then display any remaining, non-language options. */
1245 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1247 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1248 opts
->x_exit_after_options
= true;
1252 case OPT__target_help
:
1253 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1254 opts
->x_exit_after_options
= true;
1256 /* Allow the target a chance to give the user some additional information. */
1263 const char * a
= arg
;
1264 unsigned int include_flags
= 0;
1265 /* Note - by default we include undocumented options when listing
1266 specific classes. If you only want to see documented options
1267 then add ",^undocumented" to the --help= option. E.g.:
1269 --help=target,^undocumented */
1270 unsigned int exclude_flags
= 0;
1272 /* Walk along the argument string, parsing each word in turn.
1274 arg = [^]{word}[,{arg}]
1275 word = {optimizers|target|warnings|undocumented|
1276 params|common|<language>} */
1281 const char * string
;
1286 { "optimizers", CL_OPTIMIZATION
},
1287 { "target", CL_TARGET
},
1288 { "warnings", CL_WARNING
},
1289 { "undocumented", CL_UNDOCUMENTED
},
1290 { "params", CL_PARAMS
},
1291 { "joined", CL_JOINED
},
1292 { "separate", CL_SEPARATE
},
1293 { "common", CL_COMMON
},
1296 unsigned int * pflags
;
1298 unsigned int lang_flag
, specific_flag
;
1305 pflags
= & exclude_flags
;
1308 pflags
= & include_flags
;
1310 comma
= strchr (a
, ',');
1321 /* Check to see if the string matches an option class name. */
1322 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1323 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1325 specific_flag
= specifics
[i
].flag
;
1329 /* Check to see if the string matches a language name.
1330 Note - we rely upon the alpha-sorted nature of the entries in
1331 the lang_names array, specifically that shorter names appear
1332 before their longer variants. (i.e. C before C++). That way
1333 when we are attempting to match --help=c for example we will
1334 match with C first and not C++. */
1335 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1336 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1338 lang_flag
= 1U << i
;
1342 if (specific_flag
!= 0)
1345 * pflags
|= specific_flag
;
1348 /* The option's argument matches both the start of a
1349 language name and the start of an option class name.
1350 We have a special case for when the user has
1351 specified "--help=c", but otherwise we have to issue
1353 if (strncasecmp (a
, "c", len
) == 0)
1354 * pflags
|= lang_flag
;
1357 "--help argument %q.*s is ambiguous, "
1358 "please be more specific",
1362 else if (lang_flag
!= 0)
1363 * pflags
|= lang_flag
;
1366 "unrecognized argument to --help= option: %q.*s",
1375 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1377 opts
->x_exit_after_options
= true;
1382 opts
->x_exit_after_options
= true;
1388 /* Currently handled in a prescan. */
1392 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1393 opts
, opts_set
, loc
, dc
);
1396 case OPT_Wlarger_than_
:
1397 opts
->x_larger_than_size
= value
;
1398 opts
->x_warn_larger_than
= value
!= -1;
1401 case OPT_Wfatal_errors
:
1402 dc
->fatal_errors
= value
;
1405 case OPT_Wframe_larger_than_
:
1406 opts
->x_frame_larger_than_size
= value
;
1407 opts
->x_warn_frame_larger_than
= value
!= -1;
1410 case OPT_Wstrict_aliasing
:
1411 set_Wstrict_aliasing (opts
, value
);
1414 case OPT_Wstrict_overflow
:
1415 opts
->x_warn_strict_overflow
= (value
1416 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1420 case OPT_Wsystem_headers
:
1421 dc
->dc_warn_system_headers
= value
;
1425 opts
->x_flag_gen_aux_info
= 1;
1428 case OPT_auxbase_strip
:
1430 char *tmp
= xstrdup (arg
);
1431 strip_off_ending (tmp
, strlen (tmp
));
1433 opts
->x_aux_base_name
= tmp
;
1438 decode_d_option (arg
, opts
, loc
, dc
);
1441 case OPT_fcall_used_
:
1442 case OPT_fcall_saved_
:
1447 case OPT_fdbg_cnt_list
:
1451 case OPT_fdebug_prefix_map_
:
1455 case OPT_fdiagnostics_show_location_
:
1456 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1459 case OPT_fdiagnostics_show_option
:
1460 dc
->show_option_requested
= value
;
1467 case OPT_ffast_math
:
1468 set_fast_math_flags (opts
, value
);
1471 case OPT_funsafe_math_optimizations
:
1472 set_unsafe_math_optimizations_flags (opts
, value
);
1479 case OPT_finline_limit_
:
1480 set_param_value ("max-inline-insns-single", value
/ 2,
1481 opts
->x_param_values
, opts_set
->x_param_values
);
1482 set_param_value ("max-inline-insns-auto", value
/ 2,
1483 opts
->x_param_values
, opts_set
->x_param_values
);
1486 case OPT_finstrument_functions_exclude_function_list_
:
1487 add_comma_separated_to_vector
1488 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1491 case OPT_finstrument_functions_exclude_file_list_
:
1492 add_comma_separated_to_vector
1493 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1496 case OPT_fmessage_length_
:
1497 pp_set_line_maximum_length (dc
->printer
, value
);
1500 case OPT_fpack_struct_
:
1501 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1503 "structure alignment must be a small power of two, not %d",
1506 opts
->x_initial_max_fld_align
= value
;
1510 case OPT_fplugin_arg_
:
1514 case OPT_fprofile_use_
:
1515 opts
->x_profile_data_prefix
= xstrdup (arg
);
1516 opts
->x_flag_profile_use
= true;
1518 /* No break here - do -fprofile-use processing. */
1519 case OPT_fprofile_use
:
1520 if (!opts_set
->x_flag_branch_probabilities
)
1521 opts
->x_flag_branch_probabilities
= value
;
1522 if (!opts_set
->x_flag_profile_values
)
1523 opts
->x_flag_profile_values
= value
;
1524 if (!opts_set
->x_flag_unroll_loops
)
1525 opts
->x_flag_unroll_loops
= value
;
1526 if (!opts_set
->x_flag_peel_loops
)
1527 opts
->x_flag_peel_loops
= value
;
1528 if (!opts_set
->x_flag_tracer
)
1529 opts
->x_flag_tracer
= value
;
1530 if (!opts_set
->x_flag_value_profile_transformations
)
1531 opts
->x_flag_value_profile_transformations
= value
;
1532 if (!opts_set
->x_flag_inline_functions
)
1533 opts
->x_flag_inline_functions
= value
;
1534 if (!opts_set
->x_flag_ipa_cp
)
1535 opts
->x_flag_ipa_cp
= value
;
1536 if (!opts_set
->x_flag_ipa_cp_clone
1537 && value
&& opts
->x_flag_ipa_cp
)
1538 opts
->x_flag_ipa_cp_clone
= value
;
1539 if (!opts_set
->x_flag_predictive_commoning
)
1540 opts
->x_flag_predictive_commoning
= value
;
1541 if (!opts_set
->x_flag_unswitch_loops
)
1542 opts
->x_flag_unswitch_loops
= value
;
1543 if (!opts_set
->x_flag_gcse_after_reload
)
1544 opts
->x_flag_gcse_after_reload
= value
;
1547 case OPT_fprofile_generate_
:
1548 opts
->x_profile_data_prefix
= xstrdup (arg
);
1550 /* No break here - do -fprofile-generate processing. */
1551 case OPT_fprofile_generate
:
1552 if (!opts_set
->x_profile_arc_flag
)
1553 opts
->x_profile_arc_flag
= value
;
1554 if (!opts_set
->x_flag_profile_values
)
1555 opts
->x_flag_profile_values
= value
;
1556 if (!opts_set
->x_flag_value_profile_transformations
)
1557 opts
->x_flag_value_profile_transformations
= value
;
1558 if (!opts_set
->x_flag_inline_functions
)
1559 opts
->x_flag_inline_functions
= value
;
1562 case OPT_fshow_column
:
1563 dc
->show_column
= value
;
1566 case OPT_frandom_seed
:
1567 /* The real switch is -fno-random-seed. */
1573 case OPT_frandom_seed_
:
1577 case OPT_fsched_verbose_
:
1578 #ifdef INSN_SCHEDULING
1579 /* Handled with Var in common.opt. */
1585 case OPT_fsched_stalled_insns_
:
1586 opts
->x_flag_sched_stalled_insns
= value
;
1587 if (opts
->x_flag_sched_stalled_insns
== 0)
1588 opts
->x_flag_sched_stalled_insns
= -1;
1591 case OPT_fsched_stalled_insns_dep_
:
1592 opts
->x_flag_sched_stalled_insns_dep
= value
;
1595 case OPT_fstack_check_
:
1596 if (!strcmp (arg
, "no"))
1597 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1598 else if (!strcmp (arg
, "generic"))
1599 /* This is the old stack checking method. */
1600 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1601 ? FULL_BUILTIN_STACK_CHECK
1602 : GENERIC_STACK_CHECK
;
1603 else if (!strcmp (arg
, "specific"))
1604 /* This is the new stack checking method. */
1605 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1606 ? FULL_BUILTIN_STACK_CHECK
1607 : STACK_CHECK_STATIC_BUILTIN
1608 ? STATIC_BUILTIN_STACK_CHECK
1609 : GENERIC_STACK_CHECK
;
1611 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1614 case OPT_fstack_limit
:
1615 /* The real switch is -fno-stack-limit. */
1621 case OPT_fstack_limit_register_
:
1622 case OPT_fstack_limit_symbol_
:
1626 case OPT_ftree_vectorizer_verbose_
:
1627 vect_set_verbosity_level (opts
, value
);
1631 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1636 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1640 if (value
< 2 || value
> 4)
1641 error_at (loc
, "dwarf version %d is not supported", value
);
1643 dwarf_version
= value
;
1644 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1648 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1653 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1658 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1663 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1667 case OPT_pedantic_errors
:
1668 opts
->x_pedantic
= 1;
1669 dc
->pedantic_errors
= 1;
1673 opts
->x_flag_lto
= "";
1677 dc
->dc_inhibit_warnings
= true;
1680 case OPT_fmax_errors_
:
1681 dc
->max_errors
= value
;
1684 case OPT_fuse_linker_plugin
:
1685 /* No-op. Used by the driver and passed to us because it starts with f.*/
1689 /* If the flag was handled in a standard way, assume the lack of
1690 processing here is intentional. */
1691 gcc_assert (option_flag_var (scode
, opts
));
1698 /* Handle --param NAME=VALUE. */
1700 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1701 location_t loc
, const char *carg
)
1706 arg
= xstrdup (carg
);
1707 equal
= strchr (arg
, '=');
1709 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1713 value
= integral_argument (equal
+ 1);
1715 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1719 set_param_value (arg
, value
,
1720 opts
->x_param_values
, opts_set
->x_param_values
);
1727 /* Used to set the level of strict aliasing warnings in OPTS,
1728 when no level is specified (i.e., when -Wstrict-aliasing, and not
1729 -Wstrict-aliasing=level was given).
1730 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1731 and 0 otherwise. After calling this function, wstrict_aliasing will be
1732 set to the default value of -Wstrict_aliasing=level, currently 3. */
1734 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1736 gcc_assert (onoff
== 0 || onoff
== 1);
1738 opts
->x_warn_strict_aliasing
= 3;
1740 opts
->x_warn_strict_aliasing
= 0;
1743 /* The following routines are useful in setting all the flags that
1744 -ffast-math and -fno-fast-math imply. */
1746 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1748 opts
->x_flag_unsafe_math_optimizations
= set
;
1749 set_unsafe_math_optimizations_flags (opts
, set
);
1750 opts
->x_flag_finite_math_only
= set
;
1751 opts
->x_flag_errno_math
= !set
;
1754 opts
->x_flag_signaling_nans
= 0;
1755 opts
->x_flag_rounding_math
= 0;
1756 opts
->x_flag_cx_limited_range
= 1;
1760 /* When -funsafe-math-optimizations is set the following
1761 flags are set as well. */
1763 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1765 opts
->x_flag_trapping_math
= !set
;
1766 opts
->x_flag_signed_zeros
= !set
;
1767 opts
->x_flag_associative_math
= set
;
1768 opts
->x_flag_reciprocal_math
= set
;
1771 /* Return true iff flags in OPTS are set as if -ffast-math. */
1773 fast_math_flags_set_p (const struct gcc_options
*opts
)
1775 return (!opts
->x_flag_trapping_math
1776 && opts
->x_flag_unsafe_math_optimizations
1777 && opts
->x_flag_finite_math_only
1778 && !opts
->x_flag_signed_zeros
1779 && !opts
->x_flag_errno_math
);
1782 /* Return true iff flags are set as if -ffast-math but using the flags stored
1783 in the struct cl_optimization structure. */
1785 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1787 return (!opt
->x_flag_trapping_math
1788 && opt
->x_flag_unsafe_math_optimizations
1789 && opt
->x_flag_finite_math_only
1790 && !opt
->x_flag_signed_zeros
1791 && !opt
->x_flag_errno_math
);
1794 /* Handle a debug output -g switch for options OPTS
1795 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1796 explicitly), location LOC. EXTENDED is true or false to support
1797 extended output (2 is special and means "-ggdb" was given). */
1799 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1800 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1803 opts
->x_use_gnu_debug_info_extensions
= extended
;
1805 if (type
== NO_DEBUG
)
1807 if (opts
->x_write_symbols
== NO_DEBUG
)
1809 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1813 #ifdef DWARF2_DEBUGGING_INFO
1814 opts
->x_write_symbols
= DWARF2_DEBUG
;
1815 #elif defined DBX_DEBUGGING_INFO
1816 opts
->x_write_symbols
= DBX_DEBUG
;
1820 if (opts
->x_write_symbols
== NO_DEBUG
)
1821 warning_at (loc
, 0, "target system does not support debug output");
1826 /* Does it conflict with an already selected type? */
1827 if (opts_set
->x_write_symbols
!= NO_DEBUG
1828 && opts
->x_write_symbols
!= NO_DEBUG
1829 && type
!= opts
->x_write_symbols
)
1830 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1831 debug_type_names
[type
]);
1832 opts
->x_write_symbols
= type
;
1833 opts_set
->x_write_symbols
= type
;
1836 /* A debug flag without a level defaults to level 2. */
1839 if (!opts
->x_debug_info_level
)
1840 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1844 int argval
= integral_argument (arg
);
1846 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1847 else if (argval
> 3)
1848 error_at (loc
, "debug output level %s is too high", arg
);
1850 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1854 /* Arrange to dump core on error for diagnostic context DC. (The
1855 regular error message is still printed first, except in the case of
1859 setup_core_dumping (diagnostic_context
*dc
)
1862 signal (SIGABRT
, SIG_DFL
);
1864 #if defined(HAVE_SETRLIMIT)
1867 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1868 fatal_error ("getting core file size maximum limit: %m");
1869 rlim
.rlim_cur
= rlim
.rlim_max
;
1870 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1871 fatal_error ("setting core file size limit to maximum: %m");
1874 diagnostic_abort_on_error (dc
);
1877 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1878 diagnostic context DC. */
1881 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1882 location_t loc
, diagnostic_context
*dc
)
1890 opts
->x_flag_debug_asm
= 1;
1893 opts
->x_flag_print_asm_name
= 1;
1896 opts
->x_flag_dump_rtl_in_asm
= 1;
1897 opts
->x_flag_print_asm_name
= 1;
1900 opts
->x_graph_dump_format
= vcg
;
1903 opts
->x_rtl_dump_and_exit
= 1;
1905 case 'D': /* These are handled by the preprocessor. */
1912 setup_core_dumping (dc
);
1915 opts
->x_flag_dump_all_passed
= true;
1919 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1924 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1925 mask LANG_MASK, option handlers HANDLERS) as an error for option
1926 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1927 NULL), location LOC. This is used by -Werror=. */
1930 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1931 const struct cl_option_handlers
*handlers
,
1932 struct gcc_options
*opts
,
1933 struct gcc_options
*opts_set
,
1934 location_t loc
, diagnostic_context
*dc
)
1939 new_option
= XNEWVEC (char, strlen (arg
) + 2);
1940 new_option
[0] = 'W';
1941 strcpy (new_option
+ 1, arg
);
1942 option_index
= find_opt (new_option
, lang_mask
);
1943 if (option_index
== OPT_SPECIAL_unknown
)
1945 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
1949 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
1951 control_warning_option (option_index
, (int) kind
, value
,
1953 handlers
, opts
, opts_set
, dc
);
1958 /* Return malloced memory for the name of the option OPTION_INDEX
1959 which enabled a diagnostic (context CONTEXT), originally of type
1960 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1964 option_name (diagnostic_context
*context
, int option_index
,
1965 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
1969 /* A warning classified as an error. */
1970 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
1971 && diag_kind
== DK_ERROR
)
1972 return concat (cl_options
[OPT_Werror_
].opt_text
,
1973 /* Skip over "-W". */
1974 cl_options
[option_index
].opt_text
+ 2,
1976 /* A warning with option. */
1978 return xstrdup (cl_options
[option_index
].opt_text
);
1980 /* A warning without option classified as an error. */
1981 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
1982 || diag_kind
== DK_WARNING
)
1984 if (context
->warning_as_error_requested
)
1985 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
1987 return xstrdup (_("enabled by default"));