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/>. */
27 #ifdef HAVE_SYS_RESOURCE_H
28 # include <sys/resource.h>
32 #include "coretypes.h"
33 #include "tm.h" /* Needed by rtl.h and used for DWARF2_DEBUGGING_INFO
34 and DBX_DEBUGGING_INFO. */
35 #include "rtl.h" /* Needed by insn-attr.h. */
40 #include "diagnostic.h"
41 #include "opts-diagnostic.h"
42 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
45 /* Run the second compilation of -fcompare-debug. Not defined using
46 Var in common.opt because this is used in Ada code and so must be
47 an actual variable not a macro. */
48 int flag_compare_debug
;
50 /* Parse the -femit-struct-debug-detailed option value
51 and set the flag variables. */
53 #define MATCH( prefix, string ) \
54 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
55 ? ((string += sizeof prefix - 1), 1) : 0)
58 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
61 /* various labels for comparison */
62 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
63 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
64 static const char none_lbl
[] = "none", any_lbl
[] = "any";
65 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
67 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
68 /* Default is to apply to as much as possible. */
69 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
73 if (MATCH (dfn_lbl
, spec
))
74 usage
= DINFO_USAGE_DFN
;
75 else if (MATCH (dir_lbl
, spec
))
76 usage
= DINFO_USAGE_DIR_USE
;
77 else if (MATCH (ind_lbl
, spec
))
78 usage
= DINFO_USAGE_IND_USE
;
80 /* Generics or not? */
81 if (MATCH (ord_lbl
, spec
))
83 else if (MATCH (gen_lbl
, spec
))
86 /* What allowable environment? */
87 if (MATCH (none_lbl
, spec
))
88 files
= DINFO_STRUCT_FILE_NONE
;
89 else if (MATCH (any_lbl
, spec
))
90 files
= DINFO_STRUCT_FILE_ANY
;
91 else if (MATCH (sys_lbl
, spec
))
92 files
= DINFO_STRUCT_FILE_SYS
;
93 else if (MATCH (base_lbl
, spec
))
94 files
= DINFO_STRUCT_FILE_BASE
;
97 "argument %qs to %<-femit-struct-debug-detailed%> "
101 /* Effect the specification. */
102 if (usage
== DINFO_USAGE_NUM_ENUMS
)
106 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
107 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
108 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
112 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
113 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
114 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
120 opts
->x_debug_struct_ordinary
[usage
] = files
;
122 opts
->x_debug_struct_generic
[usage
] = files
;
126 set_struct_debug_option (opts
, loc
, spec
+1);
129 /* No more -femit-struct-debug-detailed specifications.
133 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
135 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
136 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
137 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
138 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
140 "%<-femit-struct-debug-detailed=dir:...%> must allow "
141 "at least as much as "
142 "%<-femit-struct-debug-detailed=ind:...%>");
146 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
149 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
151 if (val
< MAX_VERBOSITY_LEVEL
)
152 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
154 opts
->x_user_vect_verbosity_level
155 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
159 /* Strip off a legitimate source ending from the input string NAME of
160 length LEN. Rather than having to know the names used by all of
161 our front ends, we strip off an ending of a period followed by
162 up to five characters. (Java uses ".class".) */
165 strip_off_ending (char *name
, int len
)
168 for (i
= 2; i
< 6 && len
> i
; i
++)
170 if (name
[len
- i
] == '.')
172 name
[len
- i
] = '\0';
178 /* Find the base name of a path, stripping off both directories and
179 a single final extension. */
181 base_of_path (const char *path
, const char **base_out
)
183 const char *base
= path
;
185 const char *p
= path
;
189 if (IS_DIR_SEPARATOR(c
))
204 /* What to print when a switch has no documentation. */
205 static const char undocumented_msg
[] = N_("This switch lacks documentation");
207 typedef char *char_p
; /* For DEF_VEC_P. */
209 DEF_VEC_ALLOC_P(char_p
,heap
);
211 static void handle_param (struct gcc_options
*opts
,
212 struct gcc_options
*opts_set
, location_t loc
,
214 static void set_debug_level (enum debug_info_type type
, int extended
,
215 const char *arg
, struct gcc_options
*opts
,
216 struct gcc_options
*opts_set
,
218 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
219 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
220 location_t loc
, diagnostic_context
*dc
);
221 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
223 static void enable_warning_as_error (const char *arg
, int value
,
224 unsigned int lang_mask
,
225 const struct cl_option_handlers
*handlers
,
226 struct gcc_options
*opts
,
227 struct gcc_options
*opts_set
,
229 diagnostic_context
*dc
);
231 /* Handle a back-end option; arguments and return value as for
235 target_handle_option (struct gcc_options
*opts
,
236 struct gcc_options
*opts_set
,
237 const struct cl_decoded_option
*decoded
,
238 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
239 location_t loc ATTRIBUTE_UNUSED
,
240 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
241 diagnostic_context
*dc
)
243 gcc_assert (opts
== &global_options
);
244 gcc_assert (opts_set
== &global_options_set
);
245 gcc_assert (dc
== global_dc
);
246 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
247 gcc_assert (kind
== DK_UNSPECIFIED
);
248 /* Although the location is not passed down to
249 targetm.handle_option, do not make assertions about its value;
250 options may come from optimize attributes and having the correct
251 location in the handler is not generally important. */
252 return targetm
.handle_option (decoded
->opt_index
, decoded
->arg
,
256 /* Add comma-separated strings to a char_p vector. */
259 add_comma_separated_to_vector (void **pvec
, const char *arg
)
265 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
267 /* We never free this string. */
280 VEC_safe_push (char_p
, heap
, vec
, token_start
);
283 if (*r
== '\\' && r
[1] == ',')
291 if (*token_start
!= '\0')
292 VEC_safe_push (char_p
, heap
, vec
, token_start
);
297 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
300 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
302 size_t num_params
= get_num_compiler_params ();
304 *opts
= global_options_init
;
305 memset (opts_set
, 0, sizeof (*opts_set
));
307 opts
->x_param_values
= XNEWVEC (int, num_params
);
308 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
309 init_param_values (opts
->x_param_values
);
311 /* Use priority coloring if cover classes is not defined for the
313 if (targetm
.ira_cover_classes
== NULL
)
314 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
316 /* Initialize whether `char' is signed. */
317 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
318 /* Set this to a special "uninitialized" value. The actual default
319 is set after target options have been processed. */
320 opts
->x_flag_short_enums
= 2;
322 /* Initialize target_flags before targetm.target_option.optimization
323 so the latter can modify it. */
324 opts
->x_target_flags
= targetm
.default_target_flags
;
326 /* Some targets have ABI-specified unwind tables. */
327 opts
->x_flag_unwind_tables
= targetm
.unwind_tables_default
;
329 /* Some targets have other target-specific initialization. */
330 targetm
.target_option
.init_struct (opts
);
333 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
334 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
335 OPTS_SET, diagnostic context DC, location LOC, with language mask
336 LANG_MASK and option handlers HANDLERS. */
339 maybe_default_option (struct gcc_options
*opts
,
340 struct gcc_options
*opts_set
,
341 const struct default_options
*default_opt
,
342 int level
, bool size
, bool fast
,
343 unsigned int lang_mask
,
344 const struct cl_option_handlers
*handlers
,
346 diagnostic_context
*dc
)
348 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
352 gcc_assert (level
== 2);
354 gcc_assert (level
== 3);
356 switch (default_opt
->levels
)
362 case OPT_LEVELS_0_ONLY
:
363 enabled
= (level
== 0);
366 case OPT_LEVELS_1_PLUS
:
367 enabled
= (level
>= 1);
370 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
371 enabled
= (level
>= 1 && !size
);
374 case OPT_LEVELS_2_PLUS
:
375 enabled
= (level
>= 2);
378 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
379 enabled
= (level
>= 2 && !size
);
382 case OPT_LEVELS_3_PLUS
:
383 enabled
= (level
>= 3);
386 case OPT_LEVELS_3_PLUS_AND_SIZE
:
387 enabled
= (level
>= 3 || size
);
390 case OPT_LEVELS_SIZE
:
394 case OPT_LEVELS_FAST
:
398 case OPT_LEVELS_NONE
:
404 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
405 default_opt
->arg
, default_opt
->value
,
406 lang_mask
, DK_UNSPECIFIED
, loc
,
408 else if (default_opt
->arg
== NULL
409 && !(option
->flags
& CL_REJECT_NEGATIVE
))
410 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
411 default_opt
->arg
, !default_opt
->value
,
412 lang_mask
, DK_UNSPECIFIED
, loc
,
416 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
417 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
418 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
419 language mask LANG_MASK and option handlers HANDLERS. */
422 maybe_default_options (struct gcc_options
*opts
,
423 struct gcc_options
*opts_set
,
424 const struct default_options
*default_opts
,
425 int level
, bool size
, bool fast
,
426 unsigned int lang_mask
,
427 const struct cl_option_handlers
*handlers
,
429 diagnostic_context
*dc
)
433 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
434 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
435 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
438 /* Table of options enabled by default at different levels. */
440 static const struct default_options default_options_table
[] =
442 /* -O1 optimizations. */
443 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
459 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
460 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
461 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
462 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
463 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
464 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
465 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
466 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
467 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
468 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
469 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
471 /* -O2 optimizations. */
472 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
484 #ifdef INSN_SCHEDULING
485 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
486 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
494 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
495 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
496 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
497 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
498 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
499 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
500 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
501 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
502 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
503 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
505 /* -O3 optimizations. */
506 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
507 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
508 /* Inlining of functions reducing size is a good idea with -Os
509 regardless of them being declared inline. */
510 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
511 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
512 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
513 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
514 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
516 /* -Ofast adds optimizations to -O3. */
517 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
519 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
522 /* Default the options in OPTS and OPTS_SET based on the optimization
523 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
525 default_options_optimization (struct gcc_options
*opts
,
526 struct gcc_options
*opts_set
,
527 struct cl_decoded_option
*decoded_options
,
528 unsigned int decoded_options_count
,
530 unsigned int lang_mask
,
531 const struct cl_option_handlers
*handlers
,
532 diagnostic_context
*dc
)
538 /* Scan to see what optimization level has been specified. That will
539 determine the default value of many flags. */
540 for (i
= 1; i
< decoded_options_count
; i
++)
542 struct cl_decoded_option
*opt
= &decoded_options
[i
];
543 switch (opt
->opt_index
)
546 if (*opt
->arg
== '\0')
548 opts
->x_optimize
= 1;
549 opts
->x_optimize_size
= 0;
554 const int optimize_val
= integral_argument (opt
->arg
);
555 if (optimize_val
== -1)
557 "argument to %qs should be a non-negative integer",
561 opts
->x_optimize
= optimize_val
;
562 if ((unsigned int) opts
->x_optimize
> 255)
563 opts
->x_optimize
= 255;
564 opts
->x_optimize_size
= 0;
571 opts
->x_optimize_size
= 1;
573 /* Optimizing for size forces optimize to be 2. */
574 opts
->x_optimize
= 2;
579 /* -Ofast only adds flags to -O3. */
580 opts
->x_optimize_size
= 0;
581 opts
->x_optimize
= 3;
586 /* Ignore other options in this prescan. */
591 maybe_default_options (opts
, opts_set
, default_options_table
,
592 opts
->x_optimize
, opts
->x_optimize_size
,
593 ofast
, lang_mask
, handlers
, loc
, dc
);
595 /* -O2 param settings. */
596 opt2
= (opts
->x_optimize
>= 2);
598 /* Track fields in field-sensitive alias analysis. */
599 maybe_set_param_value
600 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
601 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
602 opts
->x_param_values
, opts_set
->x_param_values
);
604 /* For -O1 only do loop invariant motion for very small loops. */
605 maybe_set_param_value
606 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
607 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
608 opts
->x_param_values
, opts_set
->x_param_values
);
610 if (opts
->x_optimize_size
)
611 /* We want to crossjump as much as possible. */
612 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
613 opts
->x_param_values
, opts_set
->x_param_values
);
615 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
616 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
617 opts
->x_param_values
, opts_set
->x_param_values
);
619 /* Allow default optimizations to be specified on a per-machine basis. */
620 maybe_default_options (opts
, opts_set
,
621 targetm
.target_option
.optimization_table
,
622 opts
->x_optimize
, opts
->x_optimize_size
,
623 ofast
, lang_mask
, handlers
, loc
, dc
);
626 /* After all options at LOC have been read into OPTS and OPTS_SET,
627 finalize settings of those options and diagnose incompatible
630 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
633 enum unwind_info_type ui_except
;
635 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
637 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
638 OPTS->X_DUMP_DIR_NAME directory. Then try to make
639 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
640 directory, typically the directory to contain the object
642 if (opts
->x_dump_dir_name
)
643 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
644 opts
->x_dump_base_name
, NULL
);
645 else if (opts
->x_aux_base_name
)
647 const char *aux_base
;
649 base_of_path (opts
->x_aux_base_name
, &aux_base
);
650 if (opts
->x_aux_base_name
!= aux_base
)
652 int dir_len
= aux_base
- opts
->x_aux_base_name
;
653 char *new_dump_base_name
=
654 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
656 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
657 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
658 /* Append existing OPTS->X_DUMP_BASE_NAME. */
659 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
660 opts
->x_dump_base_name
= new_dump_base_name
;
665 /* Handle related options for unit-at-a-time, toplevel-reorder, and
667 if (!opts
->x_flag_unit_at_a_time
)
669 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
670 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
672 opts
->x_flag_section_anchors
= 0;
673 if (opts
->x_flag_toplevel_reorder
== 1)
674 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
676 opts
->x_flag_toplevel_reorder
= 0;
679 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
680 if (opts
->x_warn_missing_noreturn
)
681 opts
->x_warn_suggest_attribute_noreturn
= true;
683 /* Unless the user has asked for section anchors, we disable toplevel
684 reordering at -O0 to disable transformations that might be surprising
685 to end users and to get -fno-toplevel-reorder tested. */
686 if (!opts
->x_optimize
687 && opts
->x_flag_toplevel_reorder
== 2
688 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
690 opts
->x_flag_toplevel_reorder
= 0;
691 opts
->x_flag_section_anchors
= 0;
693 if (!opts
->x_flag_toplevel_reorder
)
695 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
696 error_at (loc
, "section anchors must be disabled when toplevel reorder"
698 opts
->x_flag_section_anchors
= 0;
701 if (!opts
->x_flag_opts_finished
)
703 if (opts
->x_flag_pie
)
704 opts
->x_flag_pic
= opts
->x_flag_pie
;
705 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
706 opts
->x_flag_shlib
= 1;
707 opts
->x_flag_opts_finished
= false;
710 if (opts
->x_optimize
== 0)
712 /* Inlining does not work if not optimizing,
713 so force it not to be done. */
714 opts
->x_warn_inline
= 0;
715 opts
->x_flag_no_inline
= 1;
718 /* The optimization to partition hot and cold basic blocks into separate
719 sections of the .o and executable files does not work (currently)
720 with exception handling. This is because there is no support for
721 generating unwind info. If opts->x_flag_exceptions is turned on
722 we need to turn off the partitioning optimization. */
724 ui_except
= targetm
.except_unwind_info (opts
);
726 if (opts
->x_flag_exceptions
727 && opts
->x_flag_reorder_blocks_and_partition
728 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
731 "-freorder-blocks-and-partition does not work "
732 "with exceptions on this architecture");
733 opts
->x_flag_reorder_blocks_and_partition
= 0;
734 opts
->x_flag_reorder_blocks
= 1;
737 /* If user requested unwind info, then turn off the partitioning
740 if (opts
->x_flag_unwind_tables
741 && !targetm
.unwind_tables_default
742 && opts
->x_flag_reorder_blocks_and_partition
743 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
746 "-freorder-blocks-and-partition does not support "
747 "unwind info on this architecture");
748 opts
->x_flag_reorder_blocks_and_partition
= 0;
749 opts
->x_flag_reorder_blocks
= 1;
752 /* If the target requested unwind info, then turn off the partitioning
753 optimization with a different message. Likewise, if the target does not
754 support named sections. */
756 if (opts
->x_flag_reorder_blocks_and_partition
757 && (!targetm
.have_named_sections
758 || (opts
->x_flag_unwind_tables
759 && targetm
.unwind_tables_default
760 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
763 "-freorder-blocks-and-partition does not work "
764 "on this architecture");
765 opts
->x_flag_reorder_blocks_and_partition
= 0;
766 opts
->x_flag_reorder_blocks
= 1;
769 /* Pipelining of outer loops is only possible when general pipelining
770 capabilities are requested. */
771 if (!opts
->x_flag_sel_sched_pipelining
)
772 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
774 if (!targetm
.ira_cover_classes
775 && opts
->x_flag_ira_algorithm
== IRA_ALGORITHM_CB
)
778 "-fira-algorithm=CB does not work on this architecture");
779 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
782 if (opts
->x_flag_conserve_stack
)
784 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
785 opts
->x_param_values
, opts_set
->x_param_values
);
786 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
787 opts
->x_param_values
, opts_set
->x_param_values
);
789 if (opts
->x_flag_wpa
|| opts
->x_flag_ltrans
)
791 /* These passes are not WHOPR compatible yet. */
792 opts
->x_flag_ipa_pta
= 0;
793 opts
->x_flag_ipa_struct_reorg
= 0;
796 if (opts
->x_flag_lto
)
799 opts
->x_flag_generate_lto
= 1;
801 /* When generating IL, do not operate in whole-program mode.
802 Otherwise, symbols will be privatized too early, causing link
804 opts
->x_flag_whole_program
= 0;
806 error_at (loc
, "LTO support has not been enabled in this configuration");
809 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
810 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
812 if ((opts
->x_flag_lto_partition_balanced
!= 0)
813 + (opts
->x_flag_lto_partition_1to1
!= 0)
814 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
815 error_at (loc
, "only one -flto-partition value can be specified");
818 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
819 default value if they choose based on other options. */
820 if (opts
->x_flag_split_stack
== -1)
821 opts
->x_flag_split_stack
= 0;
822 else if (opts
->x_flag_split_stack
)
824 if (!targetm
.supports_split_stack (true, opts
))
826 error_at (loc
, "%<-fsplit-stack%> is not supported by "
827 "this compiler configuration");
828 opts
->x_flag_split_stack
= 0;
833 #define LEFT_COLUMN 27
835 /* Output ITEM, of length ITEM_WIDTH, in the left column,
836 followed by word-wrapped HELP in a second column. */
838 wrap_help (const char *help
,
840 unsigned int item_width
,
841 unsigned int columns
)
843 unsigned int col_width
= LEFT_COLUMN
;
844 unsigned int remaining
, room
, len
;
846 remaining
= strlen (help
);
850 room
= columns
- 3 - MAX (col_width
, item_width
);
859 for (i
= 0; help
[i
]; i
++)
861 if (i
>= room
&& len
!= remaining
)
865 else if ((help
[i
] == '-' || help
[i
] == '/')
866 && help
[i
+ 1] != ' '
867 && i
> 0 && ISALPHA (help
[i
- 1]))
872 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
874 while (help
[len
] == ' ')
882 /* Print help for a specific front-end, etc. */
884 print_filtered_help (unsigned int include_flags
,
885 unsigned int exclude_flags
,
886 unsigned int any_flags
,
887 unsigned int columns
,
888 struct gcc_options
*opts
,
889 unsigned int lang_mask
)
894 bool displayed
= false;
896 if (include_flags
== CL_PARAMS
)
898 for (i
= 0; i
< LAST_PARAM
; i
++)
900 const char *param
= compiler_params
[i
].option
;
902 help
= compiler_params
[i
].help
;
903 if (help
== NULL
|| *help
== '\0')
905 if (exclude_flags
& CL_UNDOCUMENTED
)
907 help
= undocumented_msg
;
910 /* Get the translation. */
913 wrap_help (help
, param
, strlen (param
), columns
);
919 if (!opts
->x_help_printed
)
920 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
922 if (!opts
->x_help_enum_printed
)
923 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
925 for (i
= 0; i
< cl_options_count
; i
++)
928 const struct cl_option
*option
= cl_options
+ i
;
933 if (include_flags
== 0
934 || ((option
->flags
& include_flags
) != include_flags
))
936 if ((option
->flags
& any_flags
) == 0)
940 /* Skip unwanted switches. */
941 if ((option
->flags
& exclude_flags
) != 0)
944 /* The driver currently prints its own help text. */
945 if ((option
->flags
& CL_DRIVER
) != 0
946 && (option
->flags
& (((1U << cl_lang_count
) - 1)
947 | CL_COMMON
| CL_TARGET
)) == 0)
951 /* Skip switches that have already been printed. */
952 if (opts
->x_help_printed
[i
])
955 opts
->x_help_printed
[i
] = true;
960 if (exclude_flags
& CL_UNDOCUMENTED
)
962 help
= undocumented_msg
;
965 /* Get the translation. */
968 /* Find the gap between the name of the
969 option and its descriptive text. */
970 tab
= strchr (help
, '\t');
979 opt
= option
->opt_text
;
983 /* With the -Q option enabled we change the descriptive text associated
984 with an option to be an indication of its current setting. */
987 void *flag_var
= option_flag_var (i
, opts
);
989 if (len
< (LEFT_COLUMN
+ 2))
990 strcpy (new_help
, "\t\t");
992 strcpy (new_help
, "\t");
995 && option
->var_type
!= CLVC_DEFER
)
997 if (option
->flags
& CL_JOINED
)
999 if (option
->var_type
== CLVC_STRING
)
1001 if (* (const char **) flag_var
!= NULL
)
1002 snprintf (new_help
+ strlen (new_help
),
1003 sizeof (new_help
) - strlen (new_help
),
1004 * (const char **) flag_var
);
1006 else if (option
->var_type
== CLVC_ENUM
)
1008 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1010 const char *arg
= NULL
;
1012 value
= e
->get (flag_var
);
1013 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1015 arg
= _("[default]");
1016 snprintf (new_help
+ strlen (new_help
),
1017 sizeof (new_help
) - strlen (new_help
),
1021 sprintf (new_help
+ strlen (new_help
),
1022 "%#x", * (int *) flag_var
);
1025 strcat (new_help
, option_enabled (i
, opts
)
1026 ? _("[enabled]") : _("[disabled]"));
1032 wrap_help (help
, opt
, len
, columns
);
1035 if (option
->var_type
== CLVC_ENUM
1036 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1037 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1042 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1045 printf (_(" No options with the desired characteristics were found\n"));
1050 /* PR 31349: Tell the user how to see all of the
1051 options supported by a specific front end. */
1052 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1053 if ((1U << i
) & langs
)
1054 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1055 lang_names
[i
], lang_names
[i
]);
1059 else if (! displayed
)
1060 printf (_(" All options with the desired characteristics have already been displayed\n"));
1064 /* Print details of enumerated option arguments, if those
1065 enumerations have help text headings provided. If no help text
1066 is provided, presume that the possible values are listed in the
1067 help text for the relevant options. */
1068 for (i
= 0; i
< cl_enums_count
; i
++)
1070 unsigned int j
, pos
;
1072 if (opts
->x_help_enum_printed
[i
] != 1)
1074 if (cl_enums
[i
].help
== NULL
)
1076 printf (" %s\n ", _(cl_enums
[i
].help
));
1078 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1080 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1082 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1084 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1094 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1099 opts
->x_help_enum_printed
[i
] = 2;
1103 /* Display help for a specified type of option.
1104 The options must have ALL of the INCLUDE_FLAGS set
1105 ANY of the flags in the ANY_FLAGS set
1106 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1107 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1109 print_specific_help (unsigned int include_flags
,
1110 unsigned int exclude_flags
,
1111 unsigned int any_flags
,
1112 struct gcc_options
*opts
,
1113 unsigned int lang_mask
)
1115 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1116 const char * description
= NULL
;
1117 const char * descrip_extra
= "";
1121 /* Sanity check: Make sure that we do not have more
1122 languages than we have bits available to enumerate them. */
1123 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1125 /* If we have not done so already, obtain
1126 the desired maximum width of the output. */
1127 if (opts
->x_help_columns
== 0)
1131 GET_ENVIRONMENT (p
, "COLUMNS");
1134 int value
= atoi (p
);
1137 opts
->x_help_columns
= value
;
1140 if (opts
->x_help_columns
== 0)
1141 /* Use a reasonable default. */
1142 opts
->x_help_columns
= 80;
1145 /* Decide upon the title for the options that we are going to display. */
1146 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1148 switch (flag
& include_flags
)
1155 description
= _("The following options are target specific");
1158 description
= _("The following options control compiler warning messages");
1160 case CL_OPTIMIZATION
:
1161 description
= _("The following options control optimizations");
1164 description
= _("The following options are language-independent");
1167 description
= _("The --param option recognizes the following as parameters");
1170 if (i
>= cl_lang_count
)
1172 if (exclude_flags
& all_langs_mask
)
1173 description
= _("The following options are specific to just the language ");
1175 description
= _("The following options are supported by the language ");
1176 descrip_extra
= lang_names
[i
];
1181 if (description
== NULL
)
1185 if (include_flags
& CL_UNDOCUMENTED
)
1186 description
= _("The following options are not documented");
1187 else if (include_flags
& CL_SEPARATE
)
1188 description
= _("The following options take separate arguments");
1189 else if (include_flags
& CL_JOINED
)
1190 description
= _("The following options take joined arguments");
1193 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1200 if (any_flags
& all_langs_mask
)
1201 description
= _("The following options are language-related");
1203 description
= _("The following options are language-independent");
1207 printf ("%s%s:\n", description
, descrip_extra
);
1208 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1209 opts
->x_help_columns
, opts
, lang_mask
);
1212 /* Handle target- and language-independent options. Return zero to
1213 generate an "unknown option" message. Only options that need
1214 extra handling need to be listed here; if you simply want
1215 DECODED->value assigned to a variable, it happens automatically. */
1218 common_handle_option (struct gcc_options
*opts
,
1219 struct gcc_options
*opts_set
,
1220 const struct cl_decoded_option
*decoded
,
1221 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1223 const struct cl_option_handlers
*handlers
,
1224 diagnostic_context
*dc
)
1226 size_t scode
= decoded
->opt_index
;
1227 const char *arg
= decoded
->arg
;
1228 int value
= decoded
->value
;
1229 enum opt_code code
= (enum opt_code
) scode
;
1231 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1236 handle_param (opts
, opts_set
, loc
, arg
);
1241 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1242 unsigned int undoc_mask
;
1245 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1248 /* First display any single language specific options. */
1249 for (i
= 0; i
< cl_lang_count
; i
++)
1251 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1253 /* Next display any multi language specific options. */
1254 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1255 /* Then display any remaining, non-language options. */
1256 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1258 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1259 opts
->x_exit_after_options
= true;
1263 case OPT__target_help
:
1264 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1265 opts
->x_exit_after_options
= true;
1267 /* Allow the target a chance to give the user some additional information. */
1274 const char * a
= arg
;
1275 unsigned int include_flags
= 0;
1276 /* Note - by default we include undocumented options when listing
1277 specific classes. If you only want to see documented options
1278 then add ",^undocumented" to the --help= option. E.g.:
1280 --help=target,^undocumented */
1281 unsigned int exclude_flags
= 0;
1283 /* Walk along the argument string, parsing each word in turn.
1285 arg = [^]{word}[,{arg}]
1286 word = {optimizers|target|warnings|undocumented|
1287 params|common|<language>} */
1292 const char * string
;
1297 { "optimizers", CL_OPTIMIZATION
},
1298 { "target", CL_TARGET
},
1299 { "warnings", CL_WARNING
},
1300 { "undocumented", CL_UNDOCUMENTED
},
1301 { "params", CL_PARAMS
},
1302 { "joined", CL_JOINED
},
1303 { "separate", CL_SEPARATE
},
1304 { "common", CL_COMMON
},
1307 unsigned int * pflags
;
1309 unsigned int lang_flag
, specific_flag
;
1316 pflags
= & exclude_flags
;
1319 pflags
= & include_flags
;
1321 comma
= strchr (a
, ',');
1332 /* Check to see if the string matches an option class name. */
1333 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1334 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1336 specific_flag
= specifics
[i
].flag
;
1340 /* Check to see if the string matches a language name.
1341 Note - we rely upon the alpha-sorted nature of the entries in
1342 the lang_names array, specifically that shorter names appear
1343 before their longer variants. (i.e. C before C++). That way
1344 when we are attempting to match --help=c for example we will
1345 match with C first and not C++. */
1346 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1347 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1349 lang_flag
= 1U << i
;
1353 if (specific_flag
!= 0)
1356 * pflags
|= specific_flag
;
1359 /* The option's argument matches both the start of a
1360 language name and the start of an option class name.
1361 We have a special case for when the user has
1362 specified "--help=c", but otherwise we have to issue
1364 if (strncasecmp (a
, "c", len
) == 0)
1365 * pflags
|= lang_flag
;
1368 "--help argument %q.*s is ambiguous, "
1369 "please be more specific",
1373 else if (lang_flag
!= 0)
1374 * pflags
|= lang_flag
;
1377 "unrecognized argument to --help= option: %q.*s",
1386 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1388 opts
->x_exit_after_options
= true;
1393 opts
->x_exit_after_options
= true;
1399 /* Currently handled in a prescan. */
1403 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1404 opts
, opts_set
, loc
, dc
);
1407 case OPT_Wlarger_than_
:
1408 opts
->x_larger_than_size
= value
;
1409 opts
->x_warn_larger_than
= value
!= -1;
1412 case OPT_Wfatal_errors
:
1413 dc
->fatal_errors
= value
;
1416 case OPT_Wframe_larger_than_
:
1417 opts
->x_frame_larger_than_size
= value
;
1418 opts
->x_warn_frame_larger_than
= value
!= -1;
1421 case OPT_Wstrict_aliasing
:
1422 set_Wstrict_aliasing (opts
, value
);
1425 case OPT_Wstrict_overflow
:
1426 opts
->x_warn_strict_overflow
= (value
1427 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1431 case OPT_Wsystem_headers
:
1432 dc
->dc_warn_system_headers
= value
;
1436 opts
->x_flag_gen_aux_info
= 1;
1439 case OPT_auxbase_strip
:
1441 char *tmp
= xstrdup (arg
);
1442 strip_off_ending (tmp
, strlen (tmp
));
1444 opts
->x_aux_base_name
= tmp
;
1449 decode_d_option (arg
, opts
, loc
, dc
);
1452 case OPT_fcall_used_
:
1453 case OPT_fcall_saved_
:
1457 case OPT_fcompare_debug_second
:
1458 flag_compare_debug
= value
;
1462 case OPT_fdbg_cnt_list
:
1466 case OPT_fdebug_prefix_map_
:
1470 case OPT_fdiagnostics_show_location_
:
1471 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1474 case OPT_fdiagnostics_show_option
:
1475 dc
->show_option_requested
= value
;
1482 case OPT_ffast_math
:
1483 set_fast_math_flags (opts
, value
);
1486 case OPT_funsafe_math_optimizations
:
1487 set_unsafe_math_optimizations_flags (opts
, value
);
1494 case OPT_finline_limit_
:
1495 set_param_value ("max-inline-insns-single", value
/ 2,
1496 opts
->x_param_values
, opts_set
->x_param_values
);
1497 set_param_value ("max-inline-insns-auto", value
/ 2,
1498 opts
->x_param_values
, opts_set
->x_param_values
);
1501 case OPT_finstrument_functions_exclude_function_list_
:
1502 add_comma_separated_to_vector
1503 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1506 case OPT_finstrument_functions_exclude_file_list_
:
1507 add_comma_separated_to_vector
1508 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1511 case OPT_fmessage_length_
:
1512 pp_set_line_maximum_length (dc
->printer
, value
);
1515 case OPT_fpack_struct_
:
1516 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1518 "structure alignment must be a small power of two, not %d",
1521 opts
->x_initial_max_fld_align
= value
;
1525 case OPT_fplugin_arg_
:
1529 case OPT_fprofile_use_
:
1530 opts
->x_profile_data_prefix
= xstrdup (arg
);
1531 opts
->x_flag_profile_use
= true;
1533 /* No break here - do -fprofile-use processing. */
1534 case OPT_fprofile_use
:
1535 if (!opts_set
->x_flag_branch_probabilities
)
1536 opts
->x_flag_branch_probabilities
= value
;
1537 if (!opts_set
->x_flag_profile_values
)
1538 opts
->x_flag_profile_values
= value
;
1539 if (!opts_set
->x_flag_unroll_loops
)
1540 opts
->x_flag_unroll_loops
= value
;
1541 if (!opts_set
->x_flag_peel_loops
)
1542 opts
->x_flag_peel_loops
= value
;
1543 if (!opts_set
->x_flag_tracer
)
1544 opts
->x_flag_tracer
= value
;
1545 if (!opts_set
->x_flag_value_profile_transformations
)
1546 opts
->x_flag_value_profile_transformations
= value
;
1547 if (!opts_set
->x_flag_inline_functions
)
1548 opts
->x_flag_inline_functions
= value
;
1549 if (!opts_set
->x_flag_ipa_cp
)
1550 opts
->x_flag_ipa_cp
= value
;
1551 if (!opts_set
->x_flag_ipa_cp_clone
1552 && value
&& opts
->x_flag_ipa_cp
)
1553 opts
->x_flag_ipa_cp_clone
= value
;
1554 if (!opts_set
->x_flag_predictive_commoning
)
1555 opts
->x_flag_predictive_commoning
= value
;
1556 if (!opts_set
->x_flag_unswitch_loops
)
1557 opts
->x_flag_unswitch_loops
= value
;
1558 if (!opts_set
->x_flag_gcse_after_reload
)
1559 opts
->x_flag_gcse_after_reload
= value
;
1562 case OPT_fprofile_generate_
:
1563 opts
->x_profile_data_prefix
= xstrdup (arg
);
1565 /* No break here - do -fprofile-generate processing. */
1566 case OPT_fprofile_generate
:
1567 if (!opts_set
->x_profile_arc_flag
)
1568 opts
->x_profile_arc_flag
= value
;
1569 if (!opts_set
->x_flag_profile_values
)
1570 opts
->x_flag_profile_values
= value
;
1571 if (!opts_set
->x_flag_value_profile_transformations
)
1572 opts
->x_flag_value_profile_transformations
= value
;
1573 if (!opts_set
->x_flag_inline_functions
)
1574 opts
->x_flag_inline_functions
= value
;
1577 case OPT_fshow_column
:
1578 dc
->show_column
= value
;
1581 case OPT_frandom_seed
:
1582 /* The real switch is -fno-random-seed. */
1588 case OPT_frandom_seed_
:
1592 case OPT_fsched_verbose_
:
1593 #ifdef INSN_SCHEDULING
1594 /* Handled with Var in common.opt. */
1600 case OPT_fsched_stalled_insns_
:
1601 opts
->x_flag_sched_stalled_insns
= value
;
1602 if (opts
->x_flag_sched_stalled_insns
== 0)
1603 opts
->x_flag_sched_stalled_insns
= -1;
1606 case OPT_fsched_stalled_insns_dep_
:
1607 opts
->x_flag_sched_stalled_insns_dep
= value
;
1610 case OPT_fstack_check_
:
1611 if (!strcmp (arg
, "no"))
1612 flag_stack_check
= NO_STACK_CHECK
;
1613 else if (!strcmp (arg
, "generic"))
1614 /* This is the old stack checking method. */
1615 flag_stack_check
= STACK_CHECK_BUILTIN
1616 ? FULL_BUILTIN_STACK_CHECK
1617 : GENERIC_STACK_CHECK
;
1618 else if (!strcmp (arg
, "specific"))
1619 /* This is the new stack checking method. */
1620 flag_stack_check
= STACK_CHECK_BUILTIN
1621 ? FULL_BUILTIN_STACK_CHECK
1622 : STACK_CHECK_STATIC_BUILTIN
1623 ? STATIC_BUILTIN_STACK_CHECK
1624 : GENERIC_STACK_CHECK
;
1626 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1629 case OPT_fstack_limit
:
1630 /* The real switch is -fno-stack-limit. */
1636 case OPT_fstack_limit_register_
:
1637 case OPT_fstack_limit_symbol_
:
1641 case OPT_ftree_vectorizer_verbose_
:
1642 vect_set_verbosity_level (opts
, value
);
1646 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1651 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1655 if (value
< 2 || value
> 4)
1656 error_at (loc
, "dwarf version %d is not supported", value
);
1658 dwarf_version
= value
;
1659 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1663 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1668 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1673 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1678 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1682 case OPT_pedantic_errors
:
1683 opts
->x_pedantic
= 1;
1684 dc
->pedantic_errors
= 1;
1688 opts
->x_flag_lto
= "";
1692 dc
->dc_inhibit_warnings
= true;
1695 case OPT_fmax_errors_
:
1696 dc
->max_errors
= value
;
1699 case OPT_fuse_linker_plugin
:
1700 /* No-op. Used by the driver and passed to us because it starts with f.*/
1704 /* If the flag was handled in a standard way, assume the lack of
1705 processing here is intentional. */
1706 gcc_assert (option_flag_var (scode
, opts
));
1713 /* Handle --param NAME=VALUE. */
1715 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1716 location_t loc
, const char *carg
)
1721 arg
= xstrdup (carg
);
1722 equal
= strchr (arg
, '=');
1724 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1728 value
= integral_argument (equal
+ 1);
1730 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1734 set_param_value (arg
, value
,
1735 opts
->x_param_values
, opts_set
->x_param_values
);
1742 /* Used to set the level of strict aliasing warnings in OPTS,
1743 when no level is specified (i.e., when -Wstrict-aliasing, and not
1744 -Wstrict-aliasing=level was given).
1745 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1746 and 0 otherwise. After calling this function, wstrict_aliasing will be
1747 set to the default value of -Wstrict_aliasing=level, currently 3. */
1749 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1751 gcc_assert (onoff
== 0 || onoff
== 1);
1753 opts
->x_warn_strict_aliasing
= 3;
1755 opts
->x_warn_strict_aliasing
= 0;
1758 /* The following routines are useful in setting all the flags that
1759 -ffast-math and -fno-fast-math imply. */
1761 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1763 opts
->x_flag_unsafe_math_optimizations
= set
;
1764 set_unsafe_math_optimizations_flags (opts
, set
);
1765 opts
->x_flag_finite_math_only
= set
;
1766 opts
->x_flag_errno_math
= !set
;
1769 opts
->x_flag_signaling_nans
= 0;
1770 opts
->x_flag_rounding_math
= 0;
1771 opts
->x_flag_cx_limited_range
= 1;
1775 /* When -funsafe-math-optimizations is set the following
1776 flags are set as well. */
1778 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1780 opts
->x_flag_trapping_math
= !set
;
1781 opts
->x_flag_signed_zeros
= !set
;
1782 opts
->x_flag_associative_math
= set
;
1783 opts
->x_flag_reciprocal_math
= set
;
1786 /* Return true iff flags in OPTS are set as if -ffast-math. */
1788 fast_math_flags_set_p (const struct gcc_options
*opts
)
1790 return (!opts
->x_flag_trapping_math
1791 && opts
->x_flag_unsafe_math_optimizations
1792 && opts
->x_flag_finite_math_only
1793 && !opts
->x_flag_signed_zeros
1794 && !opts
->x_flag_errno_math
);
1797 /* Return true iff flags are set as if -ffast-math but using the flags stored
1798 in the struct cl_optimization structure. */
1800 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1802 return (!opt
->x_flag_trapping_math
1803 && opt
->x_flag_unsafe_math_optimizations
1804 && opt
->x_flag_finite_math_only
1805 && !opt
->x_flag_signed_zeros
1806 && !opt
->x_flag_errno_math
);
1809 /* Handle a debug output -g switch for options OPTS
1810 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1811 explicitly), location LOC. EXTENDED is true or false to support
1812 extended output (2 is special and means "-ggdb" was given). */
1814 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1815 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1818 opts
->x_use_gnu_debug_info_extensions
= extended
;
1820 if (type
== NO_DEBUG
)
1822 if (opts
->x_write_symbols
== NO_DEBUG
)
1824 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1828 #ifdef DWARF2_DEBUGGING_INFO
1829 opts
->x_write_symbols
= DWARF2_DEBUG
;
1830 #elif defined DBX_DEBUGGING_INFO
1831 opts
->x_write_symbols
= DBX_DEBUG
;
1835 if (opts
->x_write_symbols
== NO_DEBUG
)
1836 warning_at (loc
, 0, "target system does not support debug output");
1841 /* Does it conflict with an already selected type? */
1842 if (opts_set
->x_write_symbols
!= NO_DEBUG
1843 && opts
->x_write_symbols
!= NO_DEBUG
1844 && type
!= opts
->x_write_symbols
)
1845 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1846 debug_type_names
[type
]);
1847 opts
->x_write_symbols
= type
;
1848 opts_set
->x_write_symbols
= type
;
1851 /* A debug flag without a level defaults to level 2. */
1854 if (!opts
->x_debug_info_level
)
1855 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1859 int argval
= integral_argument (arg
);
1861 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1862 else if (argval
> 3)
1863 error_at (loc
, "debug output level %s is too high", arg
);
1865 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1869 /* Arrange to dump core on error for diagnostic context DC. (The
1870 regular error message is still printed first, except in the case of
1874 setup_core_dumping (diagnostic_context
*dc
)
1877 signal (SIGABRT
, SIG_DFL
);
1879 #if defined(HAVE_SETRLIMIT)
1882 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1883 fatal_error ("getting core file size maximum limit: %m");
1884 rlim
.rlim_cur
= rlim
.rlim_max
;
1885 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1886 fatal_error ("setting core file size limit to maximum: %m");
1889 diagnostic_abort_on_error (dc
);
1892 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1893 diagnostic context DC. */
1896 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1897 location_t loc
, diagnostic_context
*dc
)
1905 opts
->x_flag_debug_asm
= 1;
1908 opts
->x_flag_print_asm_name
= 1;
1911 opts
->x_flag_dump_rtl_in_asm
= 1;
1912 opts
->x_flag_print_asm_name
= 1;
1915 opts
->x_graph_dump_format
= vcg
;
1918 opts
->x_rtl_dump_and_exit
= 1;
1920 case 'D': /* These are handled by the preprocessor. */
1927 setup_core_dumping (dc
);
1930 opts
->x_flag_dump_all_passed
= true;
1934 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1939 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1940 mask LANG_MASK, option handlers HANDLERS) as an error for option
1941 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1942 NULL), location LOC. This is used by -Werror=. */
1945 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1946 const struct cl_option_handlers
*handlers
,
1947 struct gcc_options
*opts
,
1948 struct gcc_options
*opts_set
,
1949 location_t loc
, diagnostic_context
*dc
)
1954 new_option
= XNEWVEC (char, strlen (arg
) + 2);
1955 new_option
[0] = 'W';
1956 strcpy (new_option
+ 1, arg
);
1957 option_index
= find_opt (new_option
, lang_mask
);
1958 if (option_index
== OPT_SPECIAL_unknown
)
1960 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
1964 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
1966 control_warning_option (option_index
, (int) kind
, value
,
1968 handlers
, opts
, opts_set
, dc
);
1973 /* Return malloced memory for the name of the option OPTION_INDEX
1974 which enabled a diagnostic (context CONTEXT), originally of type
1975 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1979 option_name (diagnostic_context
*context
, int option_index
,
1980 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
1984 /* A warning classified as an error. */
1985 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
1986 && diag_kind
== DK_ERROR
)
1987 return concat (cl_options
[OPT_Werror_
].opt_text
,
1988 /* Skip over "-W". */
1989 cl_options
[option_index
].opt_text
+ 2,
1991 /* A warning with option. */
1993 return xstrdup (cl_options
[option_index
].opt_text
);
1995 /* A warning without option classified as an error. */
1996 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
1997 || diag_kind
== DK_WARNING
)
1999 if (context
->warning_as_error_requested
)
2000 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2002 return xstrdup (_("enabled by default"));