1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
26 #include "tm.h" /* Needed by rtl.h and used for STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
29 #include "rtl.h" /* Needed by insn-attr.h. */
34 #include "diagnostic.h"
35 #include "opts-diagnostic.h"
36 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
39 /* Parse the -femit-struct-debug-detailed option value
40 and set the flag variables. */
42 #define MATCH( prefix, string ) \
43 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
44 ? ((string += sizeof prefix - 1), 1) : 0)
47 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
50 /* various labels for comparison */
51 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
52 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
53 static const char none_lbl
[] = "none", any_lbl
[] = "any";
54 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
56 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
57 /* Default is to apply to as much as possible. */
58 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
62 if (MATCH (dfn_lbl
, spec
))
63 usage
= DINFO_USAGE_DFN
;
64 else if (MATCH (dir_lbl
, spec
))
65 usage
= DINFO_USAGE_DIR_USE
;
66 else if (MATCH (ind_lbl
, spec
))
67 usage
= DINFO_USAGE_IND_USE
;
69 /* Generics or not? */
70 if (MATCH (ord_lbl
, spec
))
72 else if (MATCH (gen_lbl
, spec
))
75 /* What allowable environment? */
76 if (MATCH (none_lbl
, spec
))
77 files
= DINFO_STRUCT_FILE_NONE
;
78 else if (MATCH (any_lbl
, spec
))
79 files
= DINFO_STRUCT_FILE_ANY
;
80 else if (MATCH (sys_lbl
, spec
))
81 files
= DINFO_STRUCT_FILE_SYS
;
82 else if (MATCH (base_lbl
, spec
))
83 files
= DINFO_STRUCT_FILE_BASE
;
86 "argument %qs to %<-femit-struct-debug-detailed%> "
90 /* Effect the specification. */
91 if (usage
== DINFO_USAGE_NUM_ENUMS
)
95 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
96 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
97 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
101 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
102 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
103 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
109 opts
->x_debug_struct_ordinary
[usage
] = files
;
111 opts
->x_debug_struct_generic
[usage
] = files
;
115 set_struct_debug_option (opts
, loc
, spec
+1);
118 /* No more -femit-struct-debug-detailed specifications.
122 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
124 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
125 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
126 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
127 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
129 "%<-femit-struct-debug-detailed=dir:...%> must allow "
130 "at least as much as "
131 "%<-femit-struct-debug-detailed=ind:...%>");
135 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
138 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
140 if (val
< MAX_VERBOSITY_LEVEL
)
141 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
143 opts
->x_user_vect_verbosity_level
144 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
148 /* Strip off a legitimate source ending from the input string NAME of
149 length LEN. Rather than having to know the names used by all of
150 our front ends, we strip off an ending of a period followed by
151 up to five characters. (Java uses ".class".) */
154 strip_off_ending (char *name
, int len
)
157 for (i
= 2; i
< 6 && len
> i
; i
++)
159 if (name
[len
- i
] == '.')
161 name
[len
- i
] = '\0';
167 /* Find the base name of a path, stripping off both directories and
168 a single final extension. */
170 base_of_path (const char *path
, const char **base_out
)
172 const char *base
= path
;
174 const char *p
= path
;
178 if (IS_DIR_SEPARATOR(c
))
193 /* What to print when a switch has no documentation. */
194 static const char undocumented_msg
[] = N_("This switch lacks documentation");
196 typedef char *char_p
; /* For DEF_VEC_P. */
198 DEF_VEC_ALLOC_P(char_p
,heap
);
200 static void handle_param (struct gcc_options
*opts
,
201 struct gcc_options
*opts_set
, location_t loc
,
203 static void set_debug_level (enum debug_info_type type
, int extended
,
204 const char *arg
, struct gcc_options
*opts
,
205 struct gcc_options
*opts_set
,
207 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
208 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
209 location_t loc
, diagnostic_context
*dc
);
210 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
212 static void enable_warning_as_error (const char *arg
, int value
,
213 unsigned int lang_mask
,
214 const struct cl_option_handlers
*handlers
,
215 struct gcc_options
*opts
,
216 struct gcc_options
*opts_set
,
218 diagnostic_context
*dc
);
220 /* Handle a back-end option; arguments and return value as for
224 target_handle_option (struct gcc_options
*opts
,
225 struct gcc_options
*opts_set
,
226 const struct cl_decoded_option
*decoded
,
227 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
229 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
230 diagnostic_context
*dc
)
232 gcc_assert (dc
== global_dc
);
233 gcc_assert (kind
== DK_UNSPECIFIED
);
234 return targetm
.handle_option (opts
, opts_set
, decoded
, loc
);
237 /* Add comma-separated strings to a char_p vector. */
240 add_comma_separated_to_vector (void **pvec
, const char *arg
)
246 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
248 /* We never free this string. */
261 VEC_safe_push (char_p
, heap
, vec
, token_start
);
264 if (*r
== '\\' && r
[1] == ',')
272 if (*token_start
!= '\0')
273 VEC_safe_push (char_p
, heap
, vec
, token_start
);
278 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
281 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
283 size_t num_params
= get_num_compiler_params ();
285 *opts
= global_options_init
;
286 memset (opts_set
, 0, sizeof (*opts_set
));
288 opts
->x_param_values
= XNEWVEC (int, num_params
);
289 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
290 init_param_values (opts
->x_param_values
);
292 /* Initialize whether `char' is signed. */
293 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
294 /* Set this to a special "uninitialized" value. The actual default
295 is set after target options have been processed. */
296 opts
->x_flag_short_enums
= 2;
298 /* Initialize target_flags before targetm.target_option.optimization
299 so the latter can modify it. */
300 opts
->x_target_flags
= targetm
.default_target_flags
;
302 /* Some targets have ABI-specified unwind tables. */
303 opts
->x_flag_unwind_tables
= targetm
.unwind_tables_default
;
305 /* Some targets have other target-specific initialization. */
306 targetm
.target_option
.init_struct (opts
);
309 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
310 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
311 OPTS_SET, diagnostic context DC, location LOC, with language mask
312 LANG_MASK and option handlers HANDLERS. */
315 maybe_default_option (struct gcc_options
*opts
,
316 struct gcc_options
*opts_set
,
317 const struct default_options
*default_opt
,
318 int level
, bool size
, bool fast
,
319 unsigned int lang_mask
,
320 const struct cl_option_handlers
*handlers
,
322 diagnostic_context
*dc
)
324 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
328 gcc_assert (level
== 2);
330 gcc_assert (level
== 3);
332 switch (default_opt
->levels
)
338 case OPT_LEVELS_0_ONLY
:
339 enabled
= (level
== 0);
342 case OPT_LEVELS_1_PLUS
:
343 enabled
= (level
>= 1);
346 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
347 enabled
= (level
>= 1 && !size
);
350 case OPT_LEVELS_2_PLUS
:
351 enabled
= (level
>= 2);
354 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
355 enabled
= (level
>= 2 && !size
);
358 case OPT_LEVELS_3_PLUS
:
359 enabled
= (level
>= 3);
362 case OPT_LEVELS_3_PLUS_AND_SIZE
:
363 enabled
= (level
>= 3 || size
);
366 case OPT_LEVELS_SIZE
:
370 case OPT_LEVELS_FAST
:
374 case OPT_LEVELS_NONE
:
380 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
381 default_opt
->arg
, default_opt
->value
,
382 lang_mask
, DK_UNSPECIFIED
, loc
,
384 else if (default_opt
->arg
== NULL
385 && !(option
->flags
& CL_REJECT_NEGATIVE
))
386 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
387 default_opt
->arg
, !default_opt
->value
,
388 lang_mask
, DK_UNSPECIFIED
, loc
,
392 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
393 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
394 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
395 language mask LANG_MASK and option handlers HANDLERS. */
398 maybe_default_options (struct gcc_options
*opts
,
399 struct gcc_options
*opts_set
,
400 const struct default_options
*default_opts
,
401 int level
, bool size
, bool fast
,
402 unsigned int lang_mask
,
403 const struct cl_option_handlers
*handlers
,
405 diagnostic_context
*dc
)
409 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
410 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
411 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
414 /* Table of options enabled by default at different levels. */
416 static const struct default_options default_options_table
[] =
418 /* -O1 optimizations. */
419 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
421 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
423 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
424 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
425 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
426 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
427 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
428 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
429 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
430 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
431 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
432 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
433 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
435 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_fcompare_elim
, NULL
, 1 },
448 /* -O2 optimizations. */
449 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
450 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
451 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
452 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
453 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
454 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
455 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
456 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
457 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
458 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
459 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
460 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
461 #ifdef INSN_SCHEDULING
462 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
463 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
473 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
474 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
475 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
477 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
483 /* -O3 optimizations. */
484 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
485 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
486 /* Inlining of functions reducing size is a good idea with -Os
487 regardless of them being declared inline. */
488 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
489 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
490 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
491 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
492 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
494 /* -Ofast adds optimizations to -O3. */
495 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
497 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
500 /* Default the options in OPTS and OPTS_SET based on the optimization
501 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
503 default_options_optimization (struct gcc_options
*opts
,
504 struct gcc_options
*opts_set
,
505 struct cl_decoded_option
*decoded_options
,
506 unsigned int decoded_options_count
,
508 unsigned int lang_mask
,
509 const struct cl_option_handlers
*handlers
,
510 diagnostic_context
*dc
)
515 /* Scan to see what optimization level has been specified. That will
516 determine the default value of many flags. */
517 for (i
= 1; i
< decoded_options_count
; i
++)
519 struct cl_decoded_option
*opt
= &decoded_options
[i
];
520 switch (opt
->opt_index
)
523 if (*opt
->arg
== '\0')
525 opts
->x_optimize
= 1;
526 opts
->x_optimize_size
= 0;
527 opts
->x_optimize_fast
= 0;
531 const int optimize_val
= integral_argument (opt
->arg
);
532 if (optimize_val
== -1)
534 "argument to %qs should be a non-negative integer",
538 opts
->x_optimize
= optimize_val
;
539 if ((unsigned int) opts
->x_optimize
> 255)
540 opts
->x_optimize
= 255;
541 opts
->x_optimize_size
= 0;
542 opts
->x_optimize_fast
= 0;
548 opts
->x_optimize_size
= 1;
550 /* Optimizing for size forces optimize to be 2. */
551 opts
->x_optimize
= 2;
552 opts
->x_optimize_fast
= 0;
556 /* -Ofast only adds flags to -O3. */
557 opts
->x_optimize_size
= 0;
558 opts
->x_optimize
= 3;
559 opts
->x_optimize_fast
= 1;
563 /* Ignore other options in this prescan. */
568 maybe_default_options (opts
, opts_set
, default_options_table
,
569 opts
->x_optimize
, opts
->x_optimize_size
,
570 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
572 /* -O2 param settings. */
573 opt2
= (opts
->x_optimize
>= 2);
575 /* Track fields in field-sensitive alias analysis. */
576 maybe_set_param_value
577 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
578 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
579 opts
->x_param_values
, opts_set
->x_param_values
);
581 /* For -O1 only do loop invariant motion for very small loops. */
582 maybe_set_param_value
583 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
584 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
585 opts
->x_param_values
, opts_set
->x_param_values
);
587 if (opts
->x_optimize_size
)
588 /* We want to crossjump as much as possible. */
589 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
590 opts
->x_param_values
, opts_set
->x_param_values
);
592 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
593 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
594 opts
->x_param_values
, opts_set
->x_param_values
);
596 /* Allow default optimizations to be specified on a per-machine basis. */
597 maybe_default_options (opts
, opts_set
,
598 targetm
.target_option
.optimization_table
,
599 opts
->x_optimize
, opts
->x_optimize_size
,
600 opts
->x_optimize_fast
, lang_mask
, handlers
, loc
, dc
);
603 /* After all options at LOC have been read into OPTS and OPTS_SET,
604 finalize settings of those options and diagnose incompatible
607 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
610 enum unwind_info_type ui_except
;
612 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
614 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
615 OPTS->X_DUMP_DIR_NAME directory. Then try to make
616 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
617 directory, typically the directory to contain the object
619 if (opts
->x_dump_dir_name
)
620 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
621 opts
->x_dump_base_name
, NULL
);
622 else if (opts
->x_aux_base_name
623 && strcmp (opts
->x_aux_base_name
, HOST_BIT_BUCKET
) != 0)
625 const char *aux_base
;
627 base_of_path (opts
->x_aux_base_name
, &aux_base
);
628 if (opts
->x_aux_base_name
!= aux_base
)
630 int dir_len
= aux_base
- opts
->x_aux_base_name
;
631 char *new_dump_base_name
=
632 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
634 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
635 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
636 /* Append existing OPTS->X_DUMP_BASE_NAME. */
637 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
638 opts
->x_dump_base_name
= new_dump_base_name
;
643 /* Handle related options for unit-at-a-time, toplevel-reorder, and
645 if (!opts
->x_flag_unit_at_a_time
)
647 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
648 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
650 opts
->x_flag_section_anchors
= 0;
651 if (opts
->x_flag_toplevel_reorder
== 1)
652 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
654 opts
->x_flag_toplevel_reorder
= 0;
657 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
658 if (opts
->x_warn_missing_noreturn
)
659 opts
->x_warn_suggest_attribute_noreturn
= true;
661 /* Unless the user has asked for section anchors, we disable toplevel
662 reordering at -O0 to disable transformations that might be surprising
663 to end users and to get -fno-toplevel-reorder tested. */
664 if (!opts
->x_optimize
665 && opts
->x_flag_toplevel_reorder
== 2
666 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
668 opts
->x_flag_toplevel_reorder
= 0;
669 opts
->x_flag_section_anchors
= 0;
671 if (!opts
->x_flag_toplevel_reorder
)
673 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
674 error_at (loc
, "section anchors must be disabled when toplevel reorder"
676 opts
->x_flag_section_anchors
= 0;
679 if (!opts
->x_flag_opts_finished
)
681 if (opts
->x_flag_pie
)
682 opts
->x_flag_pic
= opts
->x_flag_pie
;
683 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
684 opts
->x_flag_shlib
= 1;
685 opts
->x_flag_opts_finished
= true;
688 if (opts
->x_optimize
== 0)
690 /* Inlining does not work if not optimizing,
691 so force it not to be done. */
692 opts
->x_warn_inline
= 0;
693 opts
->x_flag_no_inline
= 1;
696 /* The optimization to partition hot and cold basic blocks into separate
697 sections of the .o and executable files does not work (currently)
698 with exception handling. This is because there is no support for
699 generating unwind info. If opts->x_flag_exceptions is turned on
700 we need to turn off the partitioning optimization. */
702 ui_except
= targetm
.except_unwind_info (opts
);
704 if (opts
->x_flag_exceptions
705 && opts
->x_flag_reorder_blocks_and_partition
706 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
709 "-freorder-blocks-and-partition does not work "
710 "with exceptions on this architecture");
711 opts
->x_flag_reorder_blocks_and_partition
= 0;
712 opts
->x_flag_reorder_blocks
= 1;
715 /* If user requested unwind info, then turn off the partitioning
718 if (opts
->x_flag_unwind_tables
719 && !targetm
.unwind_tables_default
720 && opts
->x_flag_reorder_blocks_and_partition
721 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
724 "-freorder-blocks-and-partition does not support "
725 "unwind info on this architecture");
726 opts
->x_flag_reorder_blocks_and_partition
= 0;
727 opts
->x_flag_reorder_blocks
= 1;
730 /* If the target requested unwind info, then turn off the partitioning
731 optimization with a different message. Likewise, if the target does not
732 support named sections. */
734 if (opts
->x_flag_reorder_blocks_and_partition
735 && (!targetm
.have_named_sections
736 || (opts
->x_flag_unwind_tables
737 && targetm
.unwind_tables_default
738 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
741 "-freorder-blocks-and-partition does not work "
742 "on this architecture");
743 opts
->x_flag_reorder_blocks_and_partition
= 0;
744 opts
->x_flag_reorder_blocks
= 1;
747 if (opts
->x_flag_reorder_blocks_and_partition
748 && !opts_set
->x_flag_reorder_functions
)
749 opts
->x_flag_reorder_functions
= 1;
751 /* Pipelining of outer loops is only possible when general pipelining
752 capabilities are requested. */
753 if (!opts
->x_flag_sel_sched_pipelining
)
754 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
756 if (opts
->x_flag_conserve_stack
)
758 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
759 opts
->x_param_values
, opts_set
->x_param_values
);
760 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
761 opts
->x_param_values
, opts_set
->x_param_values
);
763 if (opts
->x_flag_wpa
|| opts
->x_flag_ltrans
)
765 /* These passes are not WHOPR compatible yet. */
766 opts
->x_flag_ipa_pta
= 0;
769 if (opts
->x_flag_lto
)
772 opts
->x_flag_generate_lto
= 1;
774 /* When generating IL, do not operate in whole-program mode.
775 Otherwise, symbols will be privatized too early, causing link
777 opts
->x_flag_whole_program
= 0;
779 error_at (loc
, "LTO support has not been enabled in this configuration");
782 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
783 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
785 if ((opts
->x_flag_lto_partition_balanced
!= 0)
786 + (opts
->x_flag_lto_partition_1to1
!= 0)
787 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
788 error_at (loc
, "only one -flto-partition value can be specified");
791 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
792 default value if they choose based on other options. */
793 if (opts
->x_flag_split_stack
== -1)
794 opts
->x_flag_split_stack
= 0;
795 else if (opts
->x_flag_split_stack
)
797 if (!targetm
.supports_split_stack (true, opts
))
799 error_at (loc
, "%<-fsplit-stack%> is not supported by "
800 "this compiler configuration");
801 opts
->x_flag_split_stack
= 0;
805 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
807 if (!opts
->x_flag_tree_vectorize
|| !opts
->x_flag_tree_loop_if_convert
)
808 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK
, 0,
809 opts
->x_param_values
, opts_set
->x_param_values
);
812 #define LEFT_COLUMN 27
814 /* Output ITEM, of length ITEM_WIDTH, in the left column,
815 followed by word-wrapped HELP in a second column. */
817 wrap_help (const char *help
,
819 unsigned int item_width
,
820 unsigned int columns
)
822 unsigned int col_width
= LEFT_COLUMN
;
823 unsigned int remaining
, room
, len
;
825 remaining
= strlen (help
);
829 room
= columns
- 3 - MAX (col_width
, item_width
);
838 for (i
= 0; help
[i
]; i
++)
840 if (i
>= room
&& len
!= remaining
)
844 else if ((help
[i
] == '-' || help
[i
] == '/')
845 && help
[i
+ 1] != ' '
846 && i
> 0 && ISALPHA (help
[i
- 1]))
851 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
853 while (help
[len
] == ' ')
861 /* Print help for a specific front-end, etc. */
863 print_filtered_help (unsigned int include_flags
,
864 unsigned int exclude_flags
,
865 unsigned int any_flags
,
866 unsigned int columns
,
867 struct gcc_options
*opts
,
868 unsigned int lang_mask
)
873 bool displayed
= false;
875 if (include_flags
== CL_PARAMS
)
877 for (i
= 0; i
< LAST_PARAM
; i
++)
879 const char *param
= compiler_params
[i
].option
;
881 help
= compiler_params
[i
].help
;
882 if (help
== NULL
|| *help
== '\0')
884 if (exclude_flags
& CL_UNDOCUMENTED
)
886 help
= undocumented_msg
;
889 /* Get the translation. */
892 wrap_help (help
, param
, strlen (param
), columns
);
898 if (!opts
->x_help_printed
)
899 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
901 if (!opts
->x_help_enum_printed
)
902 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
904 for (i
= 0; i
< cl_options_count
; i
++)
907 const struct cl_option
*option
= cl_options
+ i
;
912 if (include_flags
== 0
913 || ((option
->flags
& include_flags
) != include_flags
))
915 if ((option
->flags
& any_flags
) == 0)
919 /* Skip unwanted switches. */
920 if ((option
->flags
& exclude_flags
) != 0)
923 /* The driver currently prints its own help text. */
924 if ((option
->flags
& CL_DRIVER
) != 0
925 && (option
->flags
& (((1U << cl_lang_count
) - 1)
926 | CL_COMMON
| CL_TARGET
)) == 0)
930 /* Skip switches that have already been printed. */
931 if (opts
->x_help_printed
[i
])
934 opts
->x_help_printed
[i
] = true;
939 if (exclude_flags
& CL_UNDOCUMENTED
)
941 help
= undocumented_msg
;
944 /* Get the translation. */
947 /* Find the gap between the name of the
948 option and its descriptive text. */
949 tab
= strchr (help
, '\t');
958 opt
= option
->opt_text
;
962 /* With the -Q option enabled we change the descriptive text associated
963 with an option to be an indication of its current setting. */
966 void *flag_var
= option_flag_var (i
, opts
);
968 if (len
< (LEFT_COLUMN
+ 2))
969 strcpy (new_help
, "\t\t");
971 strcpy (new_help
, "\t");
974 && option
->var_type
!= CLVC_DEFER
)
976 if (option
->flags
& CL_JOINED
)
978 if (option
->var_type
== CLVC_STRING
)
980 if (* (const char **) flag_var
!= NULL
)
981 snprintf (new_help
+ strlen (new_help
),
982 sizeof (new_help
) - strlen (new_help
),
983 * (const char **) flag_var
);
985 else if (option
->var_type
== CLVC_ENUM
)
987 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
989 const char *arg
= NULL
;
991 value
= e
->get (flag_var
);
992 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
994 arg
= _("[default]");
995 snprintf (new_help
+ strlen (new_help
),
996 sizeof (new_help
) - strlen (new_help
),
1000 sprintf (new_help
+ strlen (new_help
),
1001 "%#x", * (int *) flag_var
);
1004 strcat (new_help
, option_enabled (i
, opts
)
1005 ? _("[enabled]") : _("[disabled]"));
1011 wrap_help (help
, opt
, len
, columns
);
1014 if (option
->var_type
== CLVC_ENUM
1015 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1016 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1021 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1024 printf (_(" No options with the desired characteristics were found\n"));
1029 /* PR 31349: Tell the user how to see all of the
1030 options supported by a specific front end. */
1031 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1032 if ((1U << i
) & langs
)
1033 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1034 lang_names
[i
], lang_names
[i
]);
1038 else if (! displayed
)
1039 printf (_(" All options with the desired characteristics have already been displayed\n"));
1043 /* Print details of enumerated option arguments, if those
1044 enumerations have help text headings provided. If no help text
1045 is provided, presume that the possible values are listed in the
1046 help text for the relevant options. */
1047 for (i
= 0; i
< cl_enums_count
; i
++)
1049 unsigned int j
, pos
;
1051 if (opts
->x_help_enum_printed
[i
] != 1)
1053 if (cl_enums
[i
].help
== NULL
)
1055 printf (" %s\n ", _(cl_enums
[i
].help
));
1057 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1059 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1061 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1063 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1073 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1078 opts
->x_help_enum_printed
[i
] = 2;
1082 /* Display help for a specified type of option.
1083 The options must have ALL of the INCLUDE_FLAGS set
1084 ANY of the flags in the ANY_FLAGS set
1085 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1086 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1088 print_specific_help (unsigned int include_flags
,
1089 unsigned int exclude_flags
,
1090 unsigned int any_flags
,
1091 struct gcc_options
*opts
,
1092 unsigned int lang_mask
)
1094 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1095 const char * description
= NULL
;
1096 const char * descrip_extra
= "";
1100 /* Sanity check: Make sure that we do not have more
1101 languages than we have bits available to enumerate them. */
1102 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1104 /* If we have not done so already, obtain
1105 the desired maximum width of the output. */
1106 if (opts
->x_help_columns
== 0)
1110 p
= getenv ("COLUMNS");
1113 int value
= atoi (p
);
1116 opts
->x_help_columns
= value
;
1119 if (opts
->x_help_columns
== 0)
1120 /* Use a reasonable default. */
1121 opts
->x_help_columns
= 80;
1124 /* Decide upon the title for the options that we are going to display. */
1125 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1127 switch (flag
& include_flags
)
1134 description
= _("The following options are target specific");
1137 description
= _("The following options control compiler warning messages");
1139 case CL_OPTIMIZATION
:
1140 description
= _("The following options control optimizations");
1143 description
= _("The following options are language-independent");
1146 description
= _("The --param option recognizes the following as parameters");
1149 if (i
>= cl_lang_count
)
1151 if (exclude_flags
& all_langs_mask
)
1152 description
= _("The following options are specific to just the language ");
1154 description
= _("The following options are supported by the language ");
1155 descrip_extra
= lang_names
[i
];
1160 if (description
== NULL
)
1164 if (include_flags
& CL_UNDOCUMENTED
)
1165 description
= _("The following options are not documented");
1166 else if (include_flags
& CL_SEPARATE
)
1167 description
= _("The following options take separate arguments");
1168 else if (include_flags
& CL_JOINED
)
1169 description
= _("The following options take joined arguments");
1172 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1179 if (any_flags
& all_langs_mask
)
1180 description
= _("The following options are language-related");
1182 description
= _("The following options are language-independent");
1186 printf ("%s%s:\n", description
, descrip_extra
);
1187 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1188 opts
->x_help_columns
, opts
, lang_mask
);
1191 /* Handle target- and language-independent options. Return zero to
1192 generate an "unknown option" message. Only options that need
1193 extra handling need to be listed here; if you simply want
1194 DECODED->value assigned to a variable, it happens automatically. */
1197 common_handle_option (struct gcc_options
*opts
,
1198 struct gcc_options
*opts_set
,
1199 const struct cl_decoded_option
*decoded
,
1200 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1202 const struct cl_option_handlers
*handlers
,
1203 diagnostic_context
*dc
)
1205 size_t scode
= decoded
->opt_index
;
1206 const char *arg
= decoded
->arg
;
1207 int value
= decoded
->value
;
1208 enum opt_code code
= (enum opt_code
) scode
;
1210 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1215 handle_param (opts
, opts_set
, loc
, arg
);
1220 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1221 unsigned int undoc_mask
;
1224 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1227 /* First display any single language specific options. */
1228 for (i
= 0; i
< cl_lang_count
; i
++)
1230 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1232 /* Next display any multi language specific options. */
1233 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1234 /* Then display any remaining, non-language options. */
1235 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1237 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1238 opts
->x_exit_after_options
= true;
1242 case OPT__target_help
:
1243 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1244 opts
->x_exit_after_options
= true;
1246 /* Allow the target a chance to give the user some additional information. */
1253 const char * a
= arg
;
1254 unsigned int include_flags
= 0;
1255 /* Note - by default we include undocumented options when listing
1256 specific classes. If you only want to see documented options
1257 then add ",^undocumented" to the --help= option. E.g.:
1259 --help=target,^undocumented */
1260 unsigned int exclude_flags
= 0;
1262 /* Walk along the argument string, parsing each word in turn.
1264 arg = [^]{word}[,{arg}]
1265 word = {optimizers|target|warnings|undocumented|
1266 params|common|<language>} */
1271 const char * string
;
1276 { "optimizers", CL_OPTIMIZATION
},
1277 { "target", CL_TARGET
},
1278 { "warnings", CL_WARNING
},
1279 { "undocumented", CL_UNDOCUMENTED
},
1280 { "params", CL_PARAMS
},
1281 { "joined", CL_JOINED
},
1282 { "separate", CL_SEPARATE
},
1283 { "common", CL_COMMON
},
1286 unsigned int * pflags
;
1288 unsigned int lang_flag
, specific_flag
;
1295 pflags
= & exclude_flags
;
1298 pflags
= & include_flags
;
1300 comma
= strchr (a
, ',');
1311 /* Check to see if the string matches an option class name. */
1312 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1313 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1315 specific_flag
= specifics
[i
].flag
;
1319 /* Check to see if the string matches a language name.
1320 Note - we rely upon the alpha-sorted nature of the entries in
1321 the lang_names array, specifically that shorter names appear
1322 before their longer variants. (i.e. C before C++). That way
1323 when we are attempting to match --help=c for example we will
1324 match with C first and not C++. */
1325 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1326 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1328 lang_flag
= 1U << i
;
1332 if (specific_flag
!= 0)
1335 * pflags
|= specific_flag
;
1338 /* The option's argument matches both the start of a
1339 language name and the start of an option class name.
1340 We have a special case for when the user has
1341 specified "--help=c", but otherwise we have to issue
1343 if (strncasecmp (a
, "c", len
) == 0)
1344 * pflags
|= lang_flag
;
1347 "--help argument %q.*s is ambiguous, "
1348 "please be more specific",
1352 else if (lang_flag
!= 0)
1353 * pflags
|= lang_flag
;
1356 "unrecognized argument to --help= option: %q.*s",
1365 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1367 opts
->x_exit_after_options
= true;
1372 opts
->x_exit_after_options
= true;
1378 /* Currently handled in a prescan. */
1382 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1383 opts
, opts_set
, loc
, dc
);
1386 case OPT_Wlarger_than_
:
1387 opts
->x_larger_than_size
= value
;
1388 opts
->x_warn_larger_than
= value
!= -1;
1391 case OPT_Wfatal_errors
:
1392 dc
->fatal_errors
= value
;
1395 case OPT_Wframe_larger_than_
:
1396 opts
->x_frame_larger_than_size
= value
;
1397 opts
->x_warn_frame_larger_than
= value
!= -1;
1400 case OPT_Wstrict_aliasing
:
1401 set_Wstrict_aliasing (opts
, value
);
1404 case OPT_Wstrict_overflow
:
1405 opts
->x_warn_strict_overflow
= (value
1406 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1410 case OPT_Wsystem_headers
:
1411 dc
->dc_warn_system_headers
= value
;
1415 opts
->x_flag_gen_aux_info
= 1;
1418 case OPT_auxbase_strip
:
1420 char *tmp
= xstrdup (arg
);
1421 strip_off_ending (tmp
, strlen (tmp
));
1423 opts
->x_aux_base_name
= tmp
;
1428 decode_d_option (arg
, opts
, loc
, dc
);
1431 case OPT_fcall_used_
:
1432 case OPT_fcall_saved_
:
1437 case OPT_fdbg_cnt_list
:
1441 case OPT_fdebug_prefix_map_
:
1445 case OPT_fdiagnostics_show_location_
:
1446 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1449 case OPT_fdiagnostics_show_option
:
1450 dc
->show_option_requested
= value
;
1457 case OPT_ffast_math
:
1458 set_fast_math_flags (opts
, value
);
1461 case OPT_funsafe_math_optimizations
:
1462 set_unsafe_math_optimizations_flags (opts
, value
);
1469 case OPT_finline_limit_
:
1470 set_param_value ("max-inline-insns-single", value
/ 2,
1471 opts
->x_param_values
, opts_set
->x_param_values
);
1472 set_param_value ("max-inline-insns-auto", value
/ 2,
1473 opts
->x_param_values
, opts_set
->x_param_values
);
1476 case OPT_finstrument_functions_exclude_function_list_
:
1477 add_comma_separated_to_vector
1478 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1481 case OPT_finstrument_functions_exclude_file_list_
:
1482 add_comma_separated_to_vector
1483 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1486 case OPT_fmessage_length_
:
1487 pp_set_line_maximum_length (dc
->printer
, value
);
1490 case OPT_fpack_struct_
:
1491 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1493 "structure alignment must be a small power of two, not %d",
1496 opts
->x_initial_max_fld_align
= value
;
1500 case OPT_fplugin_arg_
:
1504 case OPT_fprofile_use_
:
1505 opts
->x_profile_data_prefix
= xstrdup (arg
);
1506 opts
->x_flag_profile_use
= true;
1508 /* No break here - do -fprofile-use processing. */
1509 case OPT_fprofile_use
:
1510 if (!opts_set
->x_flag_branch_probabilities
)
1511 opts
->x_flag_branch_probabilities
= value
;
1512 if (!opts_set
->x_flag_profile_values
)
1513 opts
->x_flag_profile_values
= value
;
1514 if (!opts_set
->x_flag_unroll_loops
)
1515 opts
->x_flag_unroll_loops
= value
;
1516 if (!opts_set
->x_flag_peel_loops
)
1517 opts
->x_flag_peel_loops
= value
;
1518 if (!opts_set
->x_flag_tracer
)
1519 opts
->x_flag_tracer
= value
;
1520 if (!opts_set
->x_flag_value_profile_transformations
)
1521 opts
->x_flag_value_profile_transformations
= value
;
1522 if (!opts_set
->x_flag_inline_functions
)
1523 opts
->x_flag_inline_functions
= value
;
1524 if (!opts_set
->x_flag_ipa_cp
)
1525 opts
->x_flag_ipa_cp
= value
;
1526 if (!opts_set
->x_flag_ipa_cp_clone
1527 && value
&& opts
->x_flag_ipa_cp
)
1528 opts
->x_flag_ipa_cp_clone
= value
;
1529 if (!opts_set
->x_flag_predictive_commoning
)
1530 opts
->x_flag_predictive_commoning
= value
;
1531 if (!opts_set
->x_flag_unswitch_loops
)
1532 opts
->x_flag_unswitch_loops
= value
;
1533 if (!opts_set
->x_flag_gcse_after_reload
)
1534 opts
->x_flag_gcse_after_reload
= value
;
1537 case OPT_fprofile_generate_
:
1538 opts
->x_profile_data_prefix
= xstrdup (arg
);
1540 /* No break here - do -fprofile-generate processing. */
1541 case OPT_fprofile_generate
:
1542 if (!opts_set
->x_profile_arc_flag
)
1543 opts
->x_profile_arc_flag
= value
;
1544 if (!opts_set
->x_flag_profile_values
)
1545 opts
->x_flag_profile_values
= value
;
1546 if (!opts_set
->x_flag_value_profile_transformations
)
1547 opts
->x_flag_value_profile_transformations
= value
;
1548 if (!opts_set
->x_flag_inline_functions
)
1549 opts
->x_flag_inline_functions
= value
;
1550 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1551 quadratic. Disable the pass until better memory representation
1553 if (!opts_set
->x_flag_ipa_reference
&& in_lto_p
)
1554 opts
->x_flag_ipa_reference
= false;
1557 case OPT_fshow_column
:
1558 dc
->show_column
= value
;
1561 case OPT_frandom_seed
:
1562 /* The real switch is -fno-random-seed. */
1568 case OPT_frandom_seed_
:
1572 case OPT_fsched_verbose_
:
1573 #ifdef INSN_SCHEDULING
1574 /* Handled with Var in common.opt. */
1580 case OPT_fsched_stalled_insns_
:
1581 opts
->x_flag_sched_stalled_insns
= value
;
1582 if (opts
->x_flag_sched_stalled_insns
== 0)
1583 opts
->x_flag_sched_stalled_insns
= -1;
1586 case OPT_fsched_stalled_insns_dep_
:
1587 opts
->x_flag_sched_stalled_insns_dep
= value
;
1590 case OPT_fstack_check_
:
1591 if (!strcmp (arg
, "no"))
1592 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1593 else if (!strcmp (arg
, "generic"))
1594 /* This is the old stack checking method. */
1595 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1596 ? FULL_BUILTIN_STACK_CHECK
1597 : GENERIC_STACK_CHECK
;
1598 else if (!strcmp (arg
, "specific"))
1599 /* This is the new stack checking method. */
1600 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1601 ? FULL_BUILTIN_STACK_CHECK
1602 : STACK_CHECK_STATIC_BUILTIN
1603 ? STATIC_BUILTIN_STACK_CHECK
1604 : GENERIC_STACK_CHECK
;
1606 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1609 case OPT_fstack_limit
:
1610 /* The real switch is -fno-stack-limit. */
1616 case OPT_fstack_limit_register_
:
1617 case OPT_fstack_limit_symbol_
:
1621 case OPT_ftree_vectorizer_verbose_
:
1622 vect_set_verbosity_level (opts
, value
);
1626 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1631 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1635 if (value
< 2 || value
> 4)
1636 error_at (loc
, "dwarf version %d is not supported", value
);
1638 dwarf_version
= value
;
1639 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1643 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1648 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1653 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1658 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1662 case OPT_pedantic_errors
:
1663 opts
->x_pedantic
= 1;
1664 dc
->pedantic_errors
= 1;
1668 opts
->x_flag_lto
= value
? "" : NULL
;
1672 dc
->dc_inhibit_warnings
= true;
1675 case OPT_fmax_errors_
:
1676 dc
->max_errors
= value
;
1679 case OPT_fuse_linker_plugin
:
1680 /* No-op. Used by the driver and passed to us because it starts with f.*/
1684 /* If the flag was handled in a standard way, assume the lack of
1685 processing here is intentional. */
1686 gcc_assert (option_flag_var (scode
, opts
));
1693 /* Handle --param NAME=VALUE. */
1695 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1696 location_t loc
, const char *carg
)
1701 arg
= xstrdup (carg
);
1702 equal
= strchr (arg
, '=');
1704 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1708 value
= integral_argument (equal
+ 1);
1710 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1714 set_param_value (arg
, value
,
1715 opts
->x_param_values
, opts_set
->x_param_values
);
1722 /* Used to set the level of strict aliasing warnings in OPTS,
1723 when no level is specified (i.e., when -Wstrict-aliasing, and not
1724 -Wstrict-aliasing=level was given).
1725 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1726 and 0 otherwise. After calling this function, wstrict_aliasing will be
1727 set to the default value of -Wstrict_aliasing=level, currently 3. */
1729 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1731 gcc_assert (onoff
== 0 || onoff
== 1);
1733 opts
->x_warn_strict_aliasing
= 3;
1735 opts
->x_warn_strict_aliasing
= 0;
1738 /* The following routines are useful in setting all the flags that
1739 -ffast-math and -fno-fast-math imply. */
1741 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1743 if (!opts
->frontend_set_flag_unsafe_math_optimizations
)
1745 opts
->x_flag_unsafe_math_optimizations
= set
;
1746 set_unsafe_math_optimizations_flags (opts
, set
);
1748 if (!opts
->frontend_set_flag_finite_math_only
)
1749 opts
->x_flag_finite_math_only
= set
;
1750 if (!opts
->frontend_set_flag_errno_math
)
1751 opts
->x_flag_errno_math
= !set
;
1754 if (!opts
->frontend_set_flag_signaling_nans
)
1755 opts
->x_flag_signaling_nans
= 0;
1756 if (!opts
->frontend_set_flag_rounding_math
)
1757 opts
->x_flag_rounding_math
= 0;
1758 if (!opts
->frontend_set_flag_cx_limited_range
)
1759 opts
->x_flag_cx_limited_range
= 1;
1763 /* When -funsafe-math-optimizations is set the following
1764 flags are set as well. */
1766 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1768 if (!opts
->frontend_set_flag_trapping_math
)
1769 opts
->x_flag_trapping_math
= !set
;
1770 if (!opts
->frontend_set_flag_signed_zeros
)
1771 opts
->x_flag_signed_zeros
= !set
;
1772 if (!opts
->frontend_set_flag_associative_math
)
1773 opts
->x_flag_associative_math
= set
;
1774 if (!opts
->frontend_set_flag_reciprocal_math
)
1775 opts
->x_flag_reciprocal_math
= set
;
1778 /* Return true iff flags in OPTS are set as if -ffast-math. */
1780 fast_math_flags_set_p (const struct gcc_options
*opts
)
1782 return (!opts
->x_flag_trapping_math
1783 && opts
->x_flag_unsafe_math_optimizations
1784 && opts
->x_flag_finite_math_only
1785 && !opts
->x_flag_signed_zeros
1786 && !opts
->x_flag_errno_math
);
1789 /* Return true iff flags are set as if -ffast-math but using the flags stored
1790 in the struct cl_optimization structure. */
1792 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1794 return (!opt
->x_flag_trapping_math
1795 && opt
->x_flag_unsafe_math_optimizations
1796 && opt
->x_flag_finite_math_only
1797 && !opt
->x_flag_signed_zeros
1798 && !opt
->x_flag_errno_math
);
1801 /* Handle a debug output -g switch for options OPTS
1802 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1803 explicitly), location LOC. EXTENDED is true or false to support
1804 extended output (2 is special and means "-ggdb" was given). */
1806 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1807 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1810 opts
->x_use_gnu_debug_info_extensions
= extended
;
1812 if (type
== NO_DEBUG
)
1814 if (opts
->x_write_symbols
== NO_DEBUG
)
1816 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1820 #ifdef DWARF2_DEBUGGING_INFO
1821 opts
->x_write_symbols
= DWARF2_DEBUG
;
1822 #elif defined DBX_DEBUGGING_INFO
1823 opts
->x_write_symbols
= DBX_DEBUG
;
1827 if (opts
->x_write_symbols
== NO_DEBUG
)
1828 warning_at (loc
, 0, "target system does not support debug output");
1833 /* Does it conflict with an already selected type? */
1834 if (opts_set
->x_write_symbols
!= NO_DEBUG
1835 && opts
->x_write_symbols
!= NO_DEBUG
1836 && type
!= opts
->x_write_symbols
)
1837 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1838 debug_type_names
[type
]);
1839 opts
->x_write_symbols
= type
;
1840 opts_set
->x_write_symbols
= type
;
1843 /* A debug flag without a level defaults to level 2. */
1846 if (!opts
->x_debug_info_level
)
1847 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1851 int argval
= integral_argument (arg
);
1853 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1854 else if (argval
> 3)
1855 error_at (loc
, "debug output level %s is too high", arg
);
1857 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1861 /* Arrange to dump core on error for diagnostic context DC. (The
1862 regular error message is still printed first, except in the case of
1866 setup_core_dumping (diagnostic_context
*dc
)
1869 signal (SIGABRT
, SIG_DFL
);
1871 #if defined(HAVE_SETRLIMIT)
1874 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1875 fatal_error ("getting core file size maximum limit: %m");
1876 rlim
.rlim_cur
= rlim
.rlim_max
;
1877 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1878 fatal_error ("setting core file size limit to maximum: %m");
1881 diagnostic_abort_on_error (dc
);
1884 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1885 diagnostic context DC. */
1888 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1889 location_t loc
, diagnostic_context
*dc
)
1897 opts
->x_flag_debug_asm
= 1;
1900 opts
->x_flag_print_asm_name
= 1;
1903 opts
->x_flag_dump_rtl_in_asm
= 1;
1904 opts
->x_flag_print_asm_name
= 1;
1907 opts
->x_graph_dump_format
= vcg
;
1910 opts
->x_rtl_dump_and_exit
= 1;
1912 case 'D': /* These are handled by the preprocessor. */
1919 setup_core_dumping (dc
);
1922 opts
->x_flag_dump_all_passed
= true;
1926 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1931 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1932 mask LANG_MASK, option handlers HANDLERS) as an error for option
1933 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1934 NULL), location LOC. This is used by -Werror=. */
1937 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1938 const struct cl_option_handlers
*handlers
,
1939 struct gcc_options
*opts
,
1940 struct gcc_options
*opts_set
,
1941 location_t loc
, diagnostic_context
*dc
)
1946 new_option
= XNEWVEC (char, strlen (arg
) + 2);
1947 new_option
[0] = 'W';
1948 strcpy (new_option
+ 1, arg
);
1949 option_index
= find_opt (new_option
, lang_mask
);
1950 if (option_index
== OPT_SPECIAL_unknown
)
1952 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
1956 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
1958 control_warning_option (option_index
, (int) kind
, value
,
1960 handlers
, opts
, opts_set
, dc
);
1965 /* Return malloced memory for the name of the option OPTION_INDEX
1966 which enabled a diagnostic (context CONTEXT), originally of type
1967 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1971 option_name (diagnostic_context
*context
, int option_index
,
1972 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
1976 /* A warning classified as an error. */
1977 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
1978 && diag_kind
== DK_ERROR
)
1979 return concat (cl_options
[OPT_Werror_
].opt_text
,
1980 /* Skip over "-W". */
1981 cl_options
[option_index
].opt_text
+ 2,
1983 /* A warning with option. */
1985 return xstrdup (cl_options
[option_index
].opt_text
);
1987 /* A warning without option classified as an error. */
1988 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
1989 || diag_kind
== DK_WARNING
)
1991 if (context
->warning_as_error_requested
)
1992 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
1994 return xstrdup (_("enabled by default"));