1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
26 #include "tm.h" /* Needed by rtl.h and used for STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
29 #include "rtl.h" /* Needed by insn-attr.h. */
34 #include "diagnostic.h"
35 #include "opts-diagnostic.h"
36 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
39 /* Parse the -femit-struct-debug-detailed option value
40 and set the flag variables. */
42 #define MATCH( prefix, string ) \
43 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
44 ? ((string += sizeof prefix - 1), 1) : 0)
47 set_struct_debug_option (struct gcc_options
*opts
, location_t loc
,
50 /* various labels for comparison */
51 static const char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
52 static const char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
53 static const char none_lbl
[] = "none", any_lbl
[] = "any";
54 static const char base_lbl
[] = "base", sys_lbl
[] = "sys";
56 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
57 /* Default is to apply to as much as possible. */
58 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
62 if (MATCH (dfn_lbl
, spec
))
63 usage
= DINFO_USAGE_DFN
;
64 else if (MATCH (dir_lbl
, spec
))
65 usage
= DINFO_USAGE_DIR_USE
;
66 else if (MATCH (ind_lbl
, spec
))
67 usage
= DINFO_USAGE_IND_USE
;
69 /* Generics or not? */
70 if (MATCH (ord_lbl
, spec
))
72 else if (MATCH (gen_lbl
, spec
))
75 /* What allowable environment? */
76 if (MATCH (none_lbl
, spec
))
77 files
= DINFO_STRUCT_FILE_NONE
;
78 else if (MATCH (any_lbl
, spec
))
79 files
= DINFO_STRUCT_FILE_ANY
;
80 else if (MATCH (sys_lbl
, spec
))
81 files
= DINFO_STRUCT_FILE_SYS
;
82 else if (MATCH (base_lbl
, spec
))
83 files
= DINFO_STRUCT_FILE_BASE
;
86 "argument %qs to %<-femit-struct-debug-detailed%> "
90 /* Effect the specification. */
91 if (usage
== DINFO_USAGE_NUM_ENUMS
)
95 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
96 opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
97 opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
101 opts
->x_debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
102 opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
103 opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
109 opts
->x_debug_struct_ordinary
[usage
] = files
;
111 opts
->x_debug_struct_generic
[usage
] = files
;
115 set_struct_debug_option (opts
, loc
, spec
+1);
118 /* No more -femit-struct-debug-detailed specifications.
122 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
124 if (opts
->x_debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
125 < opts
->x_debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
126 || opts
->x_debug_struct_generic
[DINFO_USAGE_DIR_USE
]
127 < opts
->x_debug_struct_generic
[DINFO_USAGE_IND_USE
])
129 "%<-femit-struct-debug-detailed=dir:...%> must allow "
130 "at least as much as "
131 "%<-femit-struct-debug-detailed=ind:...%>");
135 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
138 vect_set_verbosity_level (struct gcc_options
*opts
, int val
)
140 if (val
< MAX_VERBOSITY_LEVEL
)
141 opts
->x_user_vect_verbosity_level
= (enum vect_verbosity_levels
) val
;
143 opts
->x_user_vect_verbosity_level
144 = (enum vect_verbosity_levels
) (MAX_VERBOSITY_LEVEL
- 1);
148 /* Strip off a legitimate source ending from the input string NAME of
149 length LEN. Rather than having to know the names used by all of
150 our front ends, we strip off an ending of a period followed by
151 up to five characters. (Java uses ".class".) */
154 strip_off_ending (char *name
, int len
)
157 for (i
= 2; i
< 6 && len
> i
; i
++)
159 if (name
[len
- i
] == '.')
161 name
[len
- i
] = '\0';
167 /* Find the base name of a path, stripping off both directories and
168 a single final extension. */
170 base_of_path (const char *path
, const char **base_out
)
172 const char *base
= path
;
174 const char *p
= path
;
178 if (IS_DIR_SEPARATOR(c
))
193 /* What to print when a switch has no documentation. */
194 static const char undocumented_msg
[] = N_("This switch lacks documentation");
196 typedef char *char_p
; /* For DEF_VEC_P. */
198 DEF_VEC_ALLOC_P(char_p
,heap
);
200 static void handle_param (struct gcc_options
*opts
,
201 struct gcc_options
*opts_set
, location_t loc
,
203 static void set_debug_level (enum debug_info_type type
, int extended
,
204 const char *arg
, struct gcc_options
*opts
,
205 struct gcc_options
*opts_set
,
207 static void set_fast_math_flags (struct gcc_options
*opts
, int set
);
208 static void decode_d_option (const char *arg
, struct gcc_options
*opts
,
209 location_t loc
, diagnostic_context
*dc
);
210 static void set_unsafe_math_optimizations_flags (struct gcc_options
*opts
,
212 static void enable_warning_as_error (const char *arg
, int value
,
213 unsigned int lang_mask
,
214 const struct cl_option_handlers
*handlers
,
215 struct gcc_options
*opts
,
216 struct gcc_options
*opts_set
,
218 diagnostic_context
*dc
);
220 /* Handle a back-end option; arguments and return value as for
224 target_handle_option (struct gcc_options
*opts
,
225 struct gcc_options
*opts_set
,
226 const struct cl_decoded_option
*decoded
,
227 unsigned int lang_mask ATTRIBUTE_UNUSED
, int kind
,
228 location_t loc ATTRIBUTE_UNUSED
,
229 const struct cl_option_handlers
*handlers ATTRIBUTE_UNUSED
,
230 diagnostic_context
*dc
)
232 gcc_assert (opts
== &global_options
);
233 gcc_assert (opts_set
== &global_options_set
);
234 gcc_assert (dc
== global_dc
);
235 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
236 gcc_assert (kind
== DK_UNSPECIFIED
);
237 /* Although the location is not passed down to
238 targetm.handle_option, do not make assertions about its value;
239 options may come from optimize attributes and having the correct
240 location in the handler is not generally important. */
241 return targetm
.handle_option (decoded
->opt_index
, decoded
->arg
,
245 /* Add comma-separated strings to a char_p vector. */
248 add_comma_separated_to_vector (void **pvec
, const char *arg
)
254 VEC(char_p
,heap
) *vec
= (VEC(char_p
,heap
) *) *pvec
;
256 /* We never free this string. */
269 VEC_safe_push (char_p
, heap
, vec
, token_start
);
272 if (*r
== '\\' && r
[1] == ',')
280 if (*token_start
!= '\0')
281 VEC_safe_push (char_p
, heap
, vec
, token_start
);
286 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
289 init_options_struct (struct gcc_options
*opts
, struct gcc_options
*opts_set
)
291 size_t num_params
= get_num_compiler_params ();
293 *opts
= global_options_init
;
294 memset (opts_set
, 0, sizeof (*opts_set
));
296 opts
->x_param_values
= XNEWVEC (int, num_params
);
297 opts_set
->x_param_values
= XCNEWVEC (int, num_params
);
298 init_param_values (opts
->x_param_values
);
300 /* Use priority coloring if cover classes is not defined for the
302 if (targetm
.ira_cover_classes
== NULL
)
303 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
305 /* Initialize whether `char' is signed. */
306 opts
->x_flag_signed_char
= DEFAULT_SIGNED_CHAR
;
307 /* Set this to a special "uninitialized" value. The actual default
308 is set after target options have been processed. */
309 opts
->x_flag_short_enums
= 2;
311 /* Initialize target_flags before targetm.target_option.optimization
312 so the latter can modify it. */
313 opts
->x_target_flags
= targetm
.default_target_flags
;
315 /* Some targets have ABI-specified unwind tables. */
316 opts
->x_flag_unwind_tables
= targetm
.unwind_tables_default
;
318 /* Some targets have other target-specific initialization. */
319 targetm
.target_option
.init_struct (opts
);
322 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
323 -Ofast if FAST is set), apply the option DEFAULT_OPT to OPTS and
324 OPTS_SET, diagnostic context DC, location LOC, with language mask
325 LANG_MASK and option handlers HANDLERS. */
328 maybe_default_option (struct gcc_options
*opts
,
329 struct gcc_options
*opts_set
,
330 const struct default_options
*default_opt
,
331 int level
, bool size
, bool fast
,
332 unsigned int lang_mask
,
333 const struct cl_option_handlers
*handlers
,
335 diagnostic_context
*dc
)
337 const struct cl_option
*option
= &cl_options
[default_opt
->opt_index
];
341 gcc_assert (level
== 2);
343 gcc_assert (level
== 3);
345 switch (default_opt
->levels
)
351 case OPT_LEVELS_0_ONLY
:
352 enabled
= (level
== 0);
355 case OPT_LEVELS_1_PLUS
:
356 enabled
= (level
>= 1);
359 case OPT_LEVELS_1_PLUS_SPEED_ONLY
:
360 enabled
= (level
>= 1 && !size
);
363 case OPT_LEVELS_2_PLUS
:
364 enabled
= (level
>= 2);
367 case OPT_LEVELS_2_PLUS_SPEED_ONLY
:
368 enabled
= (level
>= 2 && !size
);
371 case OPT_LEVELS_3_PLUS
:
372 enabled
= (level
>= 3);
375 case OPT_LEVELS_3_PLUS_AND_SIZE
:
376 enabled
= (level
>= 3 || size
);
379 case OPT_LEVELS_SIZE
:
383 case OPT_LEVELS_FAST
:
387 case OPT_LEVELS_NONE
:
393 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
394 default_opt
->arg
, default_opt
->value
,
395 lang_mask
, DK_UNSPECIFIED
, loc
,
397 else if (default_opt
->arg
== NULL
398 && !(option
->flags
& CL_REJECT_NEGATIVE
))
399 handle_generated_option (opts
, opts_set
, default_opt
->opt_index
,
400 default_opt
->arg
, !default_opt
->value
,
401 lang_mask
, DK_UNSPECIFIED
, loc
,
405 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
406 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
407 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
408 language mask LANG_MASK and option handlers HANDLERS. */
411 maybe_default_options (struct gcc_options
*opts
,
412 struct gcc_options
*opts_set
,
413 const struct default_options
*default_opts
,
414 int level
, bool size
, bool fast
,
415 unsigned int lang_mask
,
416 const struct cl_option_handlers
*handlers
,
418 diagnostic_context
*dc
)
422 for (i
= 0; default_opts
[i
].levels
!= OPT_LEVELS_NONE
; i
++)
423 maybe_default_option (opts
, opts_set
, &default_opts
[i
],
424 level
, size
, fast
, lang_mask
, handlers
, loc
, dc
);
427 /* Table of options enabled by default at different levels. */
429 static const struct default_options default_options_table
[] =
431 /* -O1 optimizations. */
432 { OPT_LEVELS_1_PLUS
, OPT_fdefer_pop
, NULL
, 1 },
434 { OPT_LEVELS_1_PLUS
, OPT_fdelayed_branch
, NULL
, 1 },
436 { OPT_LEVELS_1_PLUS
, OPT_fguess_branch_probability
, NULL
, 1 },
437 { OPT_LEVELS_1_PLUS
, OPT_fcprop_registers
, NULL
, 1 },
438 { OPT_LEVELS_1_PLUS
, OPT_fforward_propagate
, NULL
, 1 },
439 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion
, NULL
, 1 },
440 { OPT_LEVELS_1_PLUS
, OPT_fif_conversion2
, NULL
, 1 },
441 { OPT_LEVELS_1_PLUS
, OPT_fipa_pure_const
, NULL
, 1 },
442 { OPT_LEVELS_1_PLUS
, OPT_fipa_reference
, NULL
, 1 },
443 { OPT_LEVELS_1_PLUS
, OPT_fipa_profile
, NULL
, 1 },
444 { OPT_LEVELS_1_PLUS
, OPT_fmerge_constants
, NULL
, 1 },
445 { OPT_LEVELS_1_PLUS
, OPT_fsplit_wide_types
, NULL
, 1 },
446 { OPT_LEVELS_1_PLUS
, OPT_ftree_ccp
, NULL
, 1 },
447 { OPT_LEVELS_1_PLUS
, OPT_ftree_bit_ccp
, NULL
, 1 },
448 { OPT_LEVELS_1_PLUS
, OPT_ftree_dce
, NULL
, 1 },
449 { OPT_LEVELS_1_PLUS
, OPT_ftree_dominator_opts
, NULL
, 1 },
450 { OPT_LEVELS_1_PLUS
, OPT_ftree_dse
, NULL
, 1 },
451 { OPT_LEVELS_1_PLUS
, OPT_ftree_ter
, NULL
, 1 },
452 { OPT_LEVELS_1_PLUS
, OPT_ftree_sra
, NULL
, 1 },
453 { OPT_LEVELS_1_PLUS
, OPT_ftree_copyrename
, NULL
, 1 },
454 { OPT_LEVELS_1_PLUS
, OPT_ftree_fre
, NULL
, 1 },
455 { OPT_LEVELS_1_PLUS
, OPT_ftree_copy_prop
, NULL
, 1 },
456 { OPT_LEVELS_1_PLUS
, OPT_ftree_sink
, NULL
, 1 },
457 { OPT_LEVELS_1_PLUS
, OPT_ftree_ch
, NULL
, 1 },
458 { OPT_LEVELS_1_PLUS
, OPT_fcombine_stack_adjustments
, NULL
, 1 },
460 /* -O2 optimizations. */
461 { OPT_LEVELS_2_PLUS
, OPT_finline_small_functions
, NULL
, 1 },
462 { OPT_LEVELS_2_PLUS
, OPT_findirect_inlining
, NULL
, 1 },
463 { OPT_LEVELS_2_PLUS
, OPT_fpartial_inlining
, NULL
, 1 },
464 { OPT_LEVELS_2_PLUS
, OPT_fthread_jumps
, NULL
, 1 },
465 { OPT_LEVELS_2_PLUS
, OPT_fcrossjumping
, NULL
, 1 },
466 { OPT_LEVELS_2_PLUS
, OPT_foptimize_sibling_calls
, NULL
, 1 },
467 { OPT_LEVELS_2_PLUS
, OPT_fcse_follow_jumps
, NULL
, 1 },
468 { OPT_LEVELS_2_PLUS
, OPT_fgcse
, NULL
, 1 },
469 { OPT_LEVELS_2_PLUS
, OPT_fexpensive_optimizations
, NULL
, 1 },
470 { OPT_LEVELS_2_PLUS
, OPT_frerun_cse_after_loop
, NULL
, 1 },
471 { OPT_LEVELS_2_PLUS
, OPT_fcaller_saves
, NULL
, 1 },
472 { OPT_LEVELS_2_PLUS
, OPT_fpeephole2
, NULL
, 1 },
473 #ifdef INSN_SCHEDULING
474 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
475 { OPT_LEVELS_2_PLUS_SPEED_ONLY
, OPT_fschedule_insns
, NULL
, 1 },
476 { OPT_LEVELS_2_PLUS
, OPT_fschedule_insns2
, NULL
, 1 },
478 { OPT_LEVELS_2_PLUS
, OPT_fregmove
, NULL
, 1 },
479 { OPT_LEVELS_2_PLUS
, OPT_fstrict_aliasing
, NULL
, 1 },
480 { OPT_LEVELS_2_PLUS
, OPT_fstrict_overflow
, NULL
, 1 },
481 { OPT_LEVELS_2_PLUS
, OPT_freorder_blocks
, NULL
, 1 },
482 { OPT_LEVELS_2_PLUS
, OPT_freorder_functions
, NULL
, 1 },
483 { OPT_LEVELS_2_PLUS
, OPT_ftree_vrp
, NULL
, 1 },
484 { OPT_LEVELS_2_PLUS
, OPT_ftree_builtin_call_dce
, NULL
, 1 },
485 { OPT_LEVELS_2_PLUS
, OPT_ftree_pre
, NULL
, 1 },
486 { OPT_LEVELS_2_PLUS
, OPT_ftree_switch_conversion
, NULL
, 1 },
487 { OPT_LEVELS_2_PLUS
, OPT_fipa_cp
, NULL
, 1 },
488 { OPT_LEVELS_2_PLUS
, OPT_fdevirtualize
, NULL
, 1 },
489 { OPT_LEVELS_2_PLUS
, OPT_fipa_sra
, NULL
, 1 },
490 { OPT_LEVELS_2_PLUS
, OPT_falign_loops
, NULL
, 1 },
491 { OPT_LEVELS_2_PLUS
, OPT_falign_jumps
, NULL
, 1 },
492 { OPT_LEVELS_2_PLUS
, OPT_falign_labels
, NULL
, 1 },
493 { OPT_LEVELS_2_PLUS
, OPT_falign_functions
, NULL
, 1 },
495 /* -O3 optimizations. */
496 { OPT_LEVELS_3_PLUS
, OPT_ftree_loop_distribute_patterns
, NULL
, 1 },
497 { OPT_LEVELS_3_PLUS
, OPT_fpredictive_commoning
, NULL
, 1 },
498 /* Inlining of functions reducing size is a good idea with -Os
499 regardless of them being declared inline. */
500 { OPT_LEVELS_3_PLUS_AND_SIZE
, OPT_finline_functions
, NULL
, 1 },
501 { OPT_LEVELS_3_PLUS
, OPT_funswitch_loops
, NULL
, 1 },
502 { OPT_LEVELS_3_PLUS
, OPT_fgcse_after_reload
, NULL
, 1 },
503 { OPT_LEVELS_3_PLUS
, OPT_ftree_vectorize
, NULL
, 1 },
504 { OPT_LEVELS_3_PLUS
, OPT_fipa_cp_clone
, NULL
, 1 },
506 /* -Ofast adds optimizations to -O3. */
507 { OPT_LEVELS_FAST
, OPT_ffast_math
, NULL
, 1 },
509 { OPT_LEVELS_NONE
, 0, NULL
, 0 }
512 /* Default the options in OPTS and OPTS_SET based on the optimization
513 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
515 default_options_optimization (struct gcc_options
*opts
,
516 struct gcc_options
*opts_set
,
517 struct cl_decoded_option
*decoded_options
,
518 unsigned int decoded_options_count
,
520 unsigned int lang_mask
,
521 const struct cl_option_handlers
*handlers
,
522 diagnostic_context
*dc
)
528 /* Scan to see what optimization level has been specified. That will
529 determine the default value of many flags. */
530 for (i
= 1; i
< decoded_options_count
; i
++)
532 struct cl_decoded_option
*opt
= &decoded_options
[i
];
533 switch (opt
->opt_index
)
536 if (*opt
->arg
== '\0')
538 opts
->x_optimize
= 1;
539 opts
->x_optimize_size
= 0;
544 const int optimize_val
= integral_argument (opt
->arg
);
545 if (optimize_val
== -1)
547 "argument to %qs should be a non-negative integer",
551 opts
->x_optimize
= optimize_val
;
552 if ((unsigned int) opts
->x_optimize
> 255)
553 opts
->x_optimize
= 255;
554 opts
->x_optimize_size
= 0;
561 opts
->x_optimize_size
= 1;
563 /* Optimizing for size forces optimize to be 2. */
564 opts
->x_optimize
= 2;
569 /* -Ofast only adds flags to -O3. */
570 opts
->x_optimize_size
= 0;
571 opts
->x_optimize
= 3;
576 /* Ignore other options in this prescan. */
581 maybe_default_options (opts
, opts_set
, default_options_table
,
582 opts
->x_optimize
, opts
->x_optimize_size
,
583 ofast
, lang_mask
, handlers
, loc
, dc
);
585 /* -O2 param settings. */
586 opt2
= (opts
->x_optimize
>= 2);
588 /* Track fields in field-sensitive alias analysis. */
589 maybe_set_param_value
590 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
,
591 opt2
? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
),
592 opts
->x_param_values
, opts_set
->x_param_values
);
594 /* For -O1 only do loop invariant motion for very small loops. */
595 maybe_set_param_value
596 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
,
597 opt2
? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
) : 1000,
598 opts
->x_param_values
, opts_set
->x_param_values
);
600 if (opts
->x_optimize_size
)
601 /* We want to crossjump as much as possible. */
602 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
, 1,
603 opts
->x_param_values
, opts_set
->x_param_values
);
605 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS
,
606 default_param_value (PARAM_MIN_CROSSJUMP_INSNS
),
607 opts
->x_param_values
, opts_set
->x_param_values
);
609 /* Allow default optimizations to be specified on a per-machine basis. */
610 maybe_default_options (opts
, opts_set
,
611 targetm
.target_option
.optimization_table
,
612 opts
->x_optimize
, opts
->x_optimize_size
,
613 ofast
, lang_mask
, handlers
, loc
, dc
);
616 /* After all options at LOC have been read into OPTS and OPTS_SET,
617 finalize settings of those options and diagnose incompatible
620 finish_options (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
623 enum unwind_info_type ui_except
;
625 if (opts
->x_dump_base_name
&& ! IS_ABSOLUTE_PATH (opts
->x_dump_base_name
))
627 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
628 OPTS->X_DUMP_DIR_NAME directory. Then try to make
629 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
630 directory, typically the directory to contain the object
632 if (opts
->x_dump_dir_name
)
633 opts
->x_dump_base_name
= concat (opts
->x_dump_dir_name
,
634 opts
->x_dump_base_name
, NULL
);
635 else if (opts
->x_aux_base_name
)
637 const char *aux_base
;
639 base_of_path (opts
->x_aux_base_name
, &aux_base
);
640 if (opts
->x_aux_base_name
!= aux_base
)
642 int dir_len
= aux_base
- opts
->x_aux_base_name
;
643 char *new_dump_base_name
=
644 XNEWVEC (char, strlen (opts
->x_dump_base_name
) + dir_len
+ 1);
646 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
647 memcpy (new_dump_base_name
, opts
->x_aux_base_name
, dir_len
);
648 /* Append existing OPTS->X_DUMP_BASE_NAME. */
649 strcpy (new_dump_base_name
+ dir_len
, opts
->x_dump_base_name
);
650 opts
->x_dump_base_name
= new_dump_base_name
;
655 /* Handle related options for unit-at-a-time, toplevel-reorder, and
657 if (!opts
->x_flag_unit_at_a_time
)
659 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
660 error_at (loc
, "section anchors must be disabled when unit-at-a-time "
662 opts
->x_flag_section_anchors
= 0;
663 if (opts
->x_flag_toplevel_reorder
== 1)
664 error_at (loc
, "toplevel reorder must be disabled when unit-at-a-time "
666 opts
->x_flag_toplevel_reorder
= 0;
669 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
670 if (opts
->x_warn_missing_noreturn
)
671 opts
->x_warn_suggest_attribute_noreturn
= true;
673 /* Unless the user has asked for section anchors, we disable toplevel
674 reordering at -O0 to disable transformations that might be surprising
675 to end users and to get -fno-toplevel-reorder tested. */
676 if (!opts
->x_optimize
677 && opts
->x_flag_toplevel_reorder
== 2
678 && !(opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
))
680 opts
->x_flag_toplevel_reorder
= 0;
681 opts
->x_flag_section_anchors
= 0;
683 if (!opts
->x_flag_toplevel_reorder
)
685 if (opts
->x_flag_section_anchors
&& opts_set
->x_flag_section_anchors
)
686 error_at (loc
, "section anchors must be disabled when toplevel reorder"
688 opts
->x_flag_section_anchors
= 0;
691 if (!opts
->x_flag_opts_finished
)
693 if (opts
->x_flag_pie
)
694 opts
->x_flag_pic
= opts
->x_flag_pie
;
695 if (opts
->x_flag_pic
&& !opts
->x_flag_pie
)
696 opts
->x_flag_shlib
= 1;
697 opts
->x_flag_opts_finished
= true;
700 if (opts
->x_optimize
== 0)
702 /* Inlining does not work if not optimizing,
703 so force it not to be done. */
704 opts
->x_warn_inline
= 0;
705 opts
->x_flag_no_inline
= 1;
708 /* The optimization to partition hot and cold basic blocks into separate
709 sections of the .o and executable files does not work (currently)
710 with exception handling. This is because there is no support for
711 generating unwind info. If opts->x_flag_exceptions is turned on
712 we need to turn off the partitioning optimization. */
714 ui_except
= targetm
.except_unwind_info (opts
);
716 if (opts
->x_flag_exceptions
717 && opts
->x_flag_reorder_blocks_and_partition
718 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
721 "-freorder-blocks-and-partition does not work "
722 "with exceptions on this architecture");
723 opts
->x_flag_reorder_blocks_and_partition
= 0;
724 opts
->x_flag_reorder_blocks
= 1;
727 /* If user requested unwind info, then turn off the partitioning
730 if (opts
->x_flag_unwind_tables
731 && !targetm
.unwind_tables_default
732 && opts
->x_flag_reorder_blocks_and_partition
733 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))
736 "-freorder-blocks-and-partition does not support "
737 "unwind info on this architecture");
738 opts
->x_flag_reorder_blocks_and_partition
= 0;
739 opts
->x_flag_reorder_blocks
= 1;
742 /* If the target requested unwind info, then turn off the partitioning
743 optimization with a different message. Likewise, if the target does not
744 support named sections. */
746 if (opts
->x_flag_reorder_blocks_and_partition
747 && (!targetm
.have_named_sections
748 || (opts
->x_flag_unwind_tables
749 && targetm
.unwind_tables_default
750 && (ui_except
== UI_SJLJ
|| ui_except
== UI_TARGET
))))
753 "-freorder-blocks-and-partition does not work "
754 "on this architecture");
755 opts
->x_flag_reorder_blocks_and_partition
= 0;
756 opts
->x_flag_reorder_blocks
= 1;
759 if (opts
->x_flag_reorder_blocks_and_partition
760 && !opts_set
->x_flag_reorder_functions
)
761 opts
->x_flag_reorder_functions
= 1;
763 /* Pipelining of outer loops is only possible when general pipelining
764 capabilities are requested. */
765 if (!opts
->x_flag_sel_sched_pipelining
)
766 opts
->x_flag_sel_sched_pipelining_outer_loops
= 0;
768 if (!targetm
.ira_cover_classes
769 && opts
->x_flag_ira_algorithm
== IRA_ALGORITHM_CB
)
772 "-fira-algorithm=CB does not work on this architecture");
773 opts
->x_flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
776 if (opts
->x_flag_conserve_stack
)
778 maybe_set_param_value (PARAM_LARGE_STACK_FRAME
, 100,
779 opts
->x_param_values
, opts_set
->x_param_values
);
780 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH
, 40,
781 opts
->x_param_values
, opts_set
->x_param_values
);
783 if (opts
->x_flag_wpa
|| opts
->x_flag_ltrans
)
785 /* These passes are not WHOPR compatible yet. */
786 opts
->x_flag_ipa_pta
= 0;
787 opts
->x_flag_ipa_struct_reorg
= 0;
790 if (opts
->x_flag_lto
)
793 opts
->x_flag_generate_lto
= 1;
795 /* When generating IL, do not operate in whole-program mode.
796 Otherwise, symbols will be privatized too early, causing link
798 opts
->x_flag_whole_program
= 0;
800 error_at (loc
, "LTO support has not been enabled in this configuration");
803 if ((opts
->x_flag_lto_partition_balanced
!= 0) + (opts
->x_flag_lto_partition_1to1
!= 0)
804 + (opts
->x_flag_lto_partition_none
!= 0) >= 1)
806 if ((opts
->x_flag_lto_partition_balanced
!= 0)
807 + (opts
->x_flag_lto_partition_1to1
!= 0)
808 + (opts
->x_flag_lto_partition_none
!= 0) > 1)
809 error_at (loc
, "only one -flto-partition value can be specified");
812 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
813 default value if they choose based on other options. */
814 if (opts
->x_flag_split_stack
== -1)
815 opts
->x_flag_split_stack
= 0;
816 else if (opts
->x_flag_split_stack
)
818 if (!targetm
.supports_split_stack (true, opts
))
820 error_at (loc
, "%<-fsplit-stack%> is not supported by "
821 "this compiler configuration");
822 opts
->x_flag_split_stack
= 0;
827 #define LEFT_COLUMN 27
829 /* Output ITEM, of length ITEM_WIDTH, in the left column,
830 followed by word-wrapped HELP in a second column. */
832 wrap_help (const char *help
,
834 unsigned int item_width
,
835 unsigned int columns
)
837 unsigned int col_width
= LEFT_COLUMN
;
838 unsigned int remaining
, room
, len
;
840 remaining
= strlen (help
);
844 room
= columns
- 3 - MAX (col_width
, item_width
);
853 for (i
= 0; help
[i
]; i
++)
855 if (i
>= room
&& len
!= remaining
)
859 else if ((help
[i
] == '-' || help
[i
] == '/')
860 && help
[i
+ 1] != ' '
861 && i
> 0 && ISALPHA (help
[i
- 1]))
866 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
868 while (help
[len
] == ' ')
876 /* Print help for a specific front-end, etc. */
878 print_filtered_help (unsigned int include_flags
,
879 unsigned int exclude_flags
,
880 unsigned int any_flags
,
881 unsigned int columns
,
882 struct gcc_options
*opts
,
883 unsigned int lang_mask
)
888 bool displayed
= false;
890 if (include_flags
== CL_PARAMS
)
892 for (i
= 0; i
< LAST_PARAM
; i
++)
894 const char *param
= compiler_params
[i
].option
;
896 help
= compiler_params
[i
].help
;
897 if (help
== NULL
|| *help
== '\0')
899 if (exclude_flags
& CL_UNDOCUMENTED
)
901 help
= undocumented_msg
;
904 /* Get the translation. */
907 wrap_help (help
, param
, strlen (param
), columns
);
913 if (!opts
->x_help_printed
)
914 opts
->x_help_printed
= XCNEWVAR (char, cl_options_count
);
916 if (!opts
->x_help_enum_printed
)
917 opts
->x_help_enum_printed
= XCNEWVAR (char, cl_enums_count
);
919 for (i
= 0; i
< cl_options_count
; i
++)
922 const struct cl_option
*option
= cl_options
+ i
;
927 if (include_flags
== 0
928 || ((option
->flags
& include_flags
) != include_flags
))
930 if ((option
->flags
& any_flags
) == 0)
934 /* Skip unwanted switches. */
935 if ((option
->flags
& exclude_flags
) != 0)
938 /* The driver currently prints its own help text. */
939 if ((option
->flags
& CL_DRIVER
) != 0
940 && (option
->flags
& (((1U << cl_lang_count
) - 1)
941 | CL_COMMON
| CL_TARGET
)) == 0)
945 /* Skip switches that have already been printed. */
946 if (opts
->x_help_printed
[i
])
949 opts
->x_help_printed
[i
] = true;
954 if (exclude_flags
& CL_UNDOCUMENTED
)
956 help
= undocumented_msg
;
959 /* Get the translation. */
962 /* Find the gap between the name of the
963 option and its descriptive text. */
964 tab
= strchr (help
, '\t');
973 opt
= option
->opt_text
;
977 /* With the -Q option enabled we change the descriptive text associated
978 with an option to be an indication of its current setting. */
981 void *flag_var
= option_flag_var (i
, opts
);
983 if (len
< (LEFT_COLUMN
+ 2))
984 strcpy (new_help
, "\t\t");
986 strcpy (new_help
, "\t");
989 && option
->var_type
!= CLVC_DEFER
)
991 if (option
->flags
& CL_JOINED
)
993 if (option
->var_type
== CLVC_STRING
)
995 if (* (const char **) flag_var
!= NULL
)
996 snprintf (new_help
+ strlen (new_help
),
997 sizeof (new_help
) - strlen (new_help
),
998 * (const char **) flag_var
);
1000 else if (option
->var_type
== CLVC_ENUM
)
1002 const struct cl_enum
*e
= &cl_enums
[option
->var_enum
];
1004 const char *arg
= NULL
;
1006 value
= e
->get (flag_var
);
1007 enum_value_to_arg (e
->values
, &arg
, value
, lang_mask
);
1009 arg
= _("[default]");
1010 snprintf (new_help
+ strlen (new_help
),
1011 sizeof (new_help
) - strlen (new_help
),
1015 sprintf (new_help
+ strlen (new_help
),
1016 "%#x", * (int *) flag_var
);
1019 strcat (new_help
, option_enabled (i
, opts
)
1020 ? _("[enabled]") : _("[disabled]"));
1026 wrap_help (help
, opt
, len
, columns
);
1029 if (option
->var_type
== CLVC_ENUM
1030 && opts
->x_help_enum_printed
[option
->var_enum
] != 2)
1031 opts
->x_help_enum_printed
[option
->var_enum
] = 1;
1036 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1039 printf (_(" No options with the desired characteristics were found\n"));
1044 /* PR 31349: Tell the user how to see all of the
1045 options supported by a specific front end. */
1046 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1047 if ((1U << i
) & langs
)
1048 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1049 lang_names
[i
], lang_names
[i
]);
1053 else if (! displayed
)
1054 printf (_(" All options with the desired characteristics have already been displayed\n"));
1058 /* Print details of enumerated option arguments, if those
1059 enumerations have help text headings provided. If no help text
1060 is provided, presume that the possible values are listed in the
1061 help text for the relevant options. */
1062 for (i
= 0; i
< cl_enums_count
; i
++)
1064 unsigned int j
, pos
;
1066 if (opts
->x_help_enum_printed
[i
] != 1)
1068 if (cl_enums
[i
].help
== NULL
)
1070 printf (" %s\n ", _(cl_enums
[i
].help
));
1072 for (j
= 0; cl_enums
[i
].values
[j
].arg
!= NULL
; j
++)
1074 unsigned int len
= strlen (cl_enums
[i
].values
[j
].arg
);
1076 if (pos
> 4 && pos
+ 1 + len
<= columns
)
1078 printf (" %s", cl_enums
[i
].values
[j
].arg
);
1088 printf ("%s", cl_enums
[i
].values
[j
].arg
);
1093 opts
->x_help_enum_printed
[i
] = 2;
1097 /* Display help for a specified type of option.
1098 The options must have ALL of the INCLUDE_FLAGS set
1099 ANY of the flags in the ANY_FLAGS set
1100 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1101 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1103 print_specific_help (unsigned int include_flags
,
1104 unsigned int exclude_flags
,
1105 unsigned int any_flags
,
1106 struct gcc_options
*opts
,
1107 unsigned int lang_mask
)
1109 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1110 const char * description
= NULL
;
1111 const char * descrip_extra
= "";
1115 /* Sanity check: Make sure that we do not have more
1116 languages than we have bits available to enumerate them. */
1117 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1119 /* If we have not done so already, obtain
1120 the desired maximum width of the output. */
1121 if (opts
->x_help_columns
== 0)
1125 p
= getenv ("COLUMNS");
1128 int value
= atoi (p
);
1131 opts
->x_help_columns
= value
;
1134 if (opts
->x_help_columns
== 0)
1135 /* Use a reasonable default. */
1136 opts
->x_help_columns
= 80;
1139 /* Decide upon the title for the options that we are going to display. */
1140 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1142 switch (flag
& include_flags
)
1149 description
= _("The following options are target specific");
1152 description
= _("The following options control compiler warning messages");
1154 case CL_OPTIMIZATION
:
1155 description
= _("The following options control optimizations");
1158 description
= _("The following options are language-independent");
1161 description
= _("The --param option recognizes the following as parameters");
1164 if (i
>= cl_lang_count
)
1166 if (exclude_flags
& all_langs_mask
)
1167 description
= _("The following options are specific to just the language ");
1169 description
= _("The following options are supported by the language ");
1170 descrip_extra
= lang_names
[i
];
1175 if (description
== NULL
)
1179 if (include_flags
& CL_UNDOCUMENTED
)
1180 description
= _("The following options are not documented");
1181 else if (include_flags
& CL_SEPARATE
)
1182 description
= _("The following options take separate arguments");
1183 else if (include_flags
& CL_JOINED
)
1184 description
= _("The following options take joined arguments");
1187 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1194 if (any_flags
& all_langs_mask
)
1195 description
= _("The following options are language-related");
1197 description
= _("The following options are language-independent");
1201 printf ("%s%s:\n", description
, descrip_extra
);
1202 print_filtered_help (include_flags
, exclude_flags
, any_flags
,
1203 opts
->x_help_columns
, opts
, lang_mask
);
1206 /* Handle target- and language-independent options. Return zero to
1207 generate an "unknown option" message. Only options that need
1208 extra handling need to be listed here; if you simply want
1209 DECODED->value assigned to a variable, it happens automatically. */
1212 common_handle_option (struct gcc_options
*opts
,
1213 struct gcc_options
*opts_set
,
1214 const struct cl_decoded_option
*decoded
,
1215 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
,
1217 const struct cl_option_handlers
*handlers
,
1218 diagnostic_context
*dc
)
1220 size_t scode
= decoded
->opt_index
;
1221 const char *arg
= decoded
->arg
;
1222 int value
= decoded
->value
;
1223 enum opt_code code
= (enum opt_code
) scode
;
1225 gcc_assert (decoded
->canonical_option_num_elements
<= 2);
1230 handle_param (opts
, opts_set
, loc
, arg
);
1235 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1236 unsigned int undoc_mask
;
1239 undoc_mask
= ((opts
->x_verbose_flag
| opts
->x_extra_warnings
)
1242 /* First display any single language specific options. */
1243 for (i
= 0; i
< cl_lang_count
; i
++)
1245 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0, opts
,
1247 /* Next display any multi language specific options. */
1248 print_specific_help (0, undoc_mask
, all_langs_mask
, opts
, lang_mask
);
1249 /* Then display any remaining, non-language options. */
1250 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1252 print_specific_help (i
, undoc_mask
, 0, opts
, lang_mask
);
1253 opts
->x_exit_after_options
= true;
1257 case OPT__target_help
:
1258 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0, opts
, lang_mask
);
1259 opts
->x_exit_after_options
= true;
1261 /* Allow the target a chance to give the user some additional information. */
1268 const char * a
= arg
;
1269 unsigned int include_flags
= 0;
1270 /* Note - by default we include undocumented options when listing
1271 specific classes. If you only want to see documented options
1272 then add ",^undocumented" to the --help= option. E.g.:
1274 --help=target,^undocumented */
1275 unsigned int exclude_flags
= 0;
1277 /* Walk along the argument string, parsing each word in turn.
1279 arg = [^]{word}[,{arg}]
1280 word = {optimizers|target|warnings|undocumented|
1281 params|common|<language>} */
1286 const char * string
;
1291 { "optimizers", CL_OPTIMIZATION
},
1292 { "target", CL_TARGET
},
1293 { "warnings", CL_WARNING
},
1294 { "undocumented", CL_UNDOCUMENTED
},
1295 { "params", CL_PARAMS
},
1296 { "joined", CL_JOINED
},
1297 { "separate", CL_SEPARATE
},
1298 { "common", CL_COMMON
},
1301 unsigned int * pflags
;
1303 unsigned int lang_flag
, specific_flag
;
1310 pflags
= & exclude_flags
;
1313 pflags
= & include_flags
;
1315 comma
= strchr (a
, ',');
1326 /* Check to see if the string matches an option class name. */
1327 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1328 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1330 specific_flag
= specifics
[i
].flag
;
1334 /* Check to see if the string matches a language name.
1335 Note - we rely upon the alpha-sorted nature of the entries in
1336 the lang_names array, specifically that shorter names appear
1337 before their longer variants. (i.e. C before C++). That way
1338 when we are attempting to match --help=c for example we will
1339 match with C first and not C++. */
1340 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1341 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1343 lang_flag
= 1U << i
;
1347 if (specific_flag
!= 0)
1350 * pflags
|= specific_flag
;
1353 /* The option's argument matches both the start of a
1354 language name and the start of an option class name.
1355 We have a special case for when the user has
1356 specified "--help=c", but otherwise we have to issue
1358 if (strncasecmp (a
, "c", len
) == 0)
1359 * pflags
|= lang_flag
;
1362 "--help argument %q.*s is ambiguous, "
1363 "please be more specific",
1367 else if (lang_flag
!= 0)
1368 * pflags
|= lang_flag
;
1371 "unrecognized argument to --help= option: %q.*s",
1380 print_specific_help (include_flags
, exclude_flags
, 0, opts
,
1382 opts
->x_exit_after_options
= true;
1387 opts
->x_exit_after_options
= true;
1393 /* Currently handled in a prescan. */
1397 enable_warning_as_error (arg
, value
, lang_mask
, handlers
,
1398 opts
, opts_set
, loc
, dc
);
1401 case OPT_Wlarger_than_
:
1402 opts
->x_larger_than_size
= value
;
1403 opts
->x_warn_larger_than
= value
!= -1;
1406 case OPT_Wfatal_errors
:
1407 dc
->fatal_errors
= value
;
1410 case OPT_Wframe_larger_than_
:
1411 opts
->x_frame_larger_than_size
= value
;
1412 opts
->x_warn_frame_larger_than
= value
!= -1;
1415 case OPT_Wstrict_aliasing
:
1416 set_Wstrict_aliasing (opts
, value
);
1419 case OPT_Wstrict_overflow
:
1420 opts
->x_warn_strict_overflow
= (value
1421 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1425 case OPT_Wsystem_headers
:
1426 dc
->dc_warn_system_headers
= value
;
1430 opts
->x_flag_gen_aux_info
= 1;
1433 case OPT_auxbase_strip
:
1435 char *tmp
= xstrdup (arg
);
1436 strip_off_ending (tmp
, strlen (tmp
));
1438 opts
->x_aux_base_name
= tmp
;
1443 decode_d_option (arg
, opts
, loc
, dc
);
1446 case OPT_fcall_used_
:
1447 case OPT_fcall_saved_
:
1452 case OPT_fdbg_cnt_list
:
1456 case OPT_fdebug_prefix_map_
:
1460 case OPT_fdiagnostics_show_location_
:
1461 diagnostic_prefixing_rule (dc
) = (diagnostic_prefixing_rule_t
) value
;
1464 case OPT_fdiagnostics_show_option
:
1465 dc
->show_option_requested
= value
;
1472 case OPT_ffast_math
:
1473 set_fast_math_flags (opts
, value
);
1476 case OPT_funsafe_math_optimizations
:
1477 set_unsafe_math_optimizations_flags (opts
, value
);
1484 case OPT_finline_limit_
:
1485 set_param_value ("max-inline-insns-single", value
/ 2,
1486 opts
->x_param_values
, opts_set
->x_param_values
);
1487 set_param_value ("max-inline-insns-auto", value
/ 2,
1488 opts
->x_param_values
, opts_set
->x_param_values
);
1491 case OPT_finstrument_functions_exclude_function_list_
:
1492 add_comma_separated_to_vector
1493 (&opts
->x_flag_instrument_functions_exclude_functions
, arg
);
1496 case OPT_finstrument_functions_exclude_file_list_
:
1497 add_comma_separated_to_vector
1498 (&opts
->x_flag_instrument_functions_exclude_files
, arg
);
1501 case OPT_fmessage_length_
:
1502 pp_set_line_maximum_length (dc
->printer
, value
);
1505 case OPT_fpack_struct_
:
1506 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1508 "structure alignment must be a small power of two, not %d",
1511 opts
->x_initial_max_fld_align
= value
;
1515 case OPT_fplugin_arg_
:
1519 case OPT_fprofile_use_
:
1520 opts
->x_profile_data_prefix
= xstrdup (arg
);
1521 opts
->x_flag_profile_use
= true;
1523 /* No break here - do -fprofile-use processing. */
1524 case OPT_fprofile_use
:
1525 if (!opts_set
->x_flag_branch_probabilities
)
1526 opts
->x_flag_branch_probabilities
= value
;
1527 if (!opts_set
->x_flag_profile_values
)
1528 opts
->x_flag_profile_values
= value
;
1529 if (!opts_set
->x_flag_unroll_loops
)
1530 opts
->x_flag_unroll_loops
= value
;
1531 if (!opts_set
->x_flag_peel_loops
)
1532 opts
->x_flag_peel_loops
= value
;
1533 if (!opts_set
->x_flag_tracer
)
1534 opts
->x_flag_tracer
= value
;
1535 if (!opts_set
->x_flag_value_profile_transformations
)
1536 opts
->x_flag_value_profile_transformations
= value
;
1537 if (!opts_set
->x_flag_inline_functions
)
1538 opts
->x_flag_inline_functions
= value
;
1539 if (!opts_set
->x_flag_ipa_cp
)
1540 opts
->x_flag_ipa_cp
= value
;
1541 if (!opts_set
->x_flag_ipa_cp_clone
1542 && value
&& opts
->x_flag_ipa_cp
)
1543 opts
->x_flag_ipa_cp_clone
= value
;
1544 if (!opts_set
->x_flag_predictive_commoning
)
1545 opts
->x_flag_predictive_commoning
= value
;
1546 if (!opts_set
->x_flag_unswitch_loops
)
1547 opts
->x_flag_unswitch_loops
= value
;
1548 if (!opts_set
->x_flag_gcse_after_reload
)
1549 opts
->x_flag_gcse_after_reload
= value
;
1552 case OPT_fprofile_generate_
:
1553 opts
->x_profile_data_prefix
= xstrdup (arg
);
1555 /* No break here - do -fprofile-generate processing. */
1556 case OPT_fprofile_generate
:
1557 if (!opts_set
->x_profile_arc_flag
)
1558 opts
->x_profile_arc_flag
= value
;
1559 if (!opts_set
->x_flag_profile_values
)
1560 opts
->x_flag_profile_values
= value
;
1561 if (!opts_set
->x_flag_value_profile_transformations
)
1562 opts
->x_flag_value_profile_transformations
= value
;
1563 if (!opts_set
->x_flag_inline_functions
)
1564 opts
->x_flag_inline_functions
= value
;
1565 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1566 quadratic. Disable the pass until better memory representation
1568 if (!opts_set
->x_flag_ipa_reference
&& in_lto_p
)
1569 opts
->x_flag_ipa_reference
= false;
1572 case OPT_fshow_column
:
1573 dc
->show_column
= value
;
1576 case OPT_frandom_seed
:
1577 /* The real switch is -fno-random-seed. */
1583 case OPT_frandom_seed_
:
1587 case OPT_fsched_verbose_
:
1588 #ifdef INSN_SCHEDULING
1589 /* Handled with Var in common.opt. */
1595 case OPT_fsched_stalled_insns_
:
1596 opts
->x_flag_sched_stalled_insns
= value
;
1597 if (opts
->x_flag_sched_stalled_insns
== 0)
1598 opts
->x_flag_sched_stalled_insns
= -1;
1601 case OPT_fsched_stalled_insns_dep_
:
1602 opts
->x_flag_sched_stalled_insns_dep
= value
;
1605 case OPT_fstack_check_
:
1606 if (!strcmp (arg
, "no"))
1607 opts
->x_flag_stack_check
= NO_STACK_CHECK
;
1608 else if (!strcmp (arg
, "generic"))
1609 /* This is the old stack checking method. */
1610 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1611 ? FULL_BUILTIN_STACK_CHECK
1612 : GENERIC_STACK_CHECK
;
1613 else if (!strcmp (arg
, "specific"))
1614 /* This is the new stack checking method. */
1615 opts
->x_flag_stack_check
= STACK_CHECK_BUILTIN
1616 ? FULL_BUILTIN_STACK_CHECK
1617 : STACK_CHECK_STATIC_BUILTIN
1618 ? STATIC_BUILTIN_STACK_CHECK
1619 : GENERIC_STACK_CHECK
;
1621 warning_at (loc
, 0, "unknown stack check parameter \"%s\"", arg
);
1624 case OPT_fstack_limit
:
1625 /* The real switch is -fno-stack-limit. */
1631 case OPT_fstack_limit_register_
:
1632 case OPT_fstack_limit_symbol_
:
1636 case OPT_ftree_vectorizer_verbose_
:
1637 vect_set_verbosity_level (opts
, value
);
1641 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
, opts
, opts_set
,
1646 set_debug_level (SDB_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1650 if (value
< 2 || value
> 4)
1651 error_at (loc
, "dwarf version %d is not supported", value
);
1653 dwarf_version
= value
;
1654 set_debug_level (DWARF2_DEBUG
, false, "", opts
, opts_set
, loc
);
1658 set_debug_level (NO_DEBUG
, 2, arg
, opts
, opts_set
, loc
);
1663 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
, opts
, opts_set
,
1668 set_debug_level (VMS_DEBUG
, false, arg
, opts
, opts_set
, loc
);
1673 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
, opts
, opts_set
,
1677 case OPT_pedantic_errors
:
1678 opts
->x_pedantic
= 1;
1679 dc
->pedantic_errors
= 1;
1683 opts
->x_flag_lto
= value
? "" : NULL
;
1687 dc
->dc_inhibit_warnings
= true;
1690 case OPT_fmax_errors_
:
1691 dc
->max_errors
= value
;
1694 case OPT_fuse_linker_plugin
:
1695 /* No-op. Used by the driver and passed to us because it starts with f.*/
1699 /* If the flag was handled in a standard way, assume the lack of
1700 processing here is intentional. */
1701 gcc_assert (option_flag_var (scode
, opts
));
1708 /* Handle --param NAME=VALUE. */
1710 handle_param (struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1711 location_t loc
, const char *carg
)
1716 arg
= xstrdup (carg
);
1717 equal
= strchr (arg
, '=');
1719 error_at (loc
, "%s: --param arguments should be of the form NAME=VALUE",
1723 value
= integral_argument (equal
+ 1);
1725 error_at (loc
, "invalid --param value %qs", equal
+ 1);
1729 set_param_value (arg
, value
,
1730 opts
->x_param_values
, opts_set
->x_param_values
);
1737 /* Used to set the level of strict aliasing warnings in OPTS,
1738 when no level is specified (i.e., when -Wstrict-aliasing, and not
1739 -Wstrict-aliasing=level was given).
1740 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1741 and 0 otherwise. After calling this function, wstrict_aliasing will be
1742 set to the default value of -Wstrict_aliasing=level, currently 3. */
1744 set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
)
1746 gcc_assert (onoff
== 0 || onoff
== 1);
1748 opts
->x_warn_strict_aliasing
= 3;
1750 opts
->x_warn_strict_aliasing
= 0;
1753 /* The following routines are useful in setting all the flags that
1754 -ffast-math and -fno-fast-math imply. */
1756 set_fast_math_flags (struct gcc_options
*opts
, int set
)
1758 opts
->x_flag_unsafe_math_optimizations
= set
;
1759 set_unsafe_math_optimizations_flags (opts
, set
);
1760 opts
->x_flag_finite_math_only
= set
;
1761 opts
->x_flag_errno_math
= !set
;
1764 opts
->x_flag_signaling_nans
= 0;
1765 opts
->x_flag_rounding_math
= 0;
1766 opts
->x_flag_cx_limited_range
= 1;
1770 /* When -funsafe-math-optimizations is set the following
1771 flags are set as well. */
1773 set_unsafe_math_optimizations_flags (struct gcc_options
*opts
, int set
)
1775 opts
->x_flag_trapping_math
= !set
;
1776 opts
->x_flag_signed_zeros
= !set
;
1777 opts
->x_flag_associative_math
= set
;
1778 opts
->x_flag_reciprocal_math
= set
;
1781 /* Return true iff flags in OPTS are set as if -ffast-math. */
1783 fast_math_flags_set_p (const struct gcc_options
*opts
)
1785 return (!opts
->x_flag_trapping_math
1786 && opts
->x_flag_unsafe_math_optimizations
1787 && opts
->x_flag_finite_math_only
1788 && !opts
->x_flag_signed_zeros
1789 && !opts
->x_flag_errno_math
);
1792 /* Return true iff flags are set as if -ffast-math but using the flags stored
1793 in the struct cl_optimization structure. */
1795 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
1797 return (!opt
->x_flag_trapping_math
1798 && opt
->x_flag_unsafe_math_optimizations
1799 && opt
->x_flag_finite_math_only
1800 && !opt
->x_flag_signed_zeros
1801 && !opt
->x_flag_errno_math
);
1804 /* Handle a debug output -g switch for options OPTS
1805 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1806 explicitly), location LOC. EXTENDED is true or false to support
1807 extended output (2 is special and means "-ggdb" was given). */
1809 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
,
1810 struct gcc_options
*opts
, struct gcc_options
*opts_set
,
1813 opts
->x_use_gnu_debug_info_extensions
= extended
;
1815 if (type
== NO_DEBUG
)
1817 if (opts
->x_write_symbols
== NO_DEBUG
)
1819 opts
->x_write_symbols
= PREFERRED_DEBUGGING_TYPE
;
1823 #ifdef DWARF2_DEBUGGING_INFO
1824 opts
->x_write_symbols
= DWARF2_DEBUG
;
1825 #elif defined DBX_DEBUGGING_INFO
1826 opts
->x_write_symbols
= DBX_DEBUG
;
1830 if (opts
->x_write_symbols
== NO_DEBUG
)
1831 warning_at (loc
, 0, "target system does not support debug output");
1836 /* Does it conflict with an already selected type? */
1837 if (opts_set
->x_write_symbols
!= NO_DEBUG
1838 && opts
->x_write_symbols
!= NO_DEBUG
1839 && type
!= opts
->x_write_symbols
)
1840 error_at (loc
, "debug format \"%s\" conflicts with prior selection",
1841 debug_type_names
[type
]);
1842 opts
->x_write_symbols
= type
;
1843 opts_set
->x_write_symbols
= type
;
1846 /* A debug flag without a level defaults to level 2. */
1849 if (!opts
->x_debug_info_level
)
1850 opts
->x_debug_info_level
= DINFO_LEVEL_NORMAL
;
1854 int argval
= integral_argument (arg
);
1856 error_at (loc
, "unrecognised debug output level \"%s\"", arg
);
1857 else if (argval
> 3)
1858 error_at (loc
, "debug output level %s is too high", arg
);
1860 opts
->x_debug_info_level
= (enum debug_info_levels
) argval
;
1864 /* Arrange to dump core on error for diagnostic context DC. (The
1865 regular error message is still printed first, except in the case of
1869 setup_core_dumping (diagnostic_context
*dc
)
1872 signal (SIGABRT
, SIG_DFL
);
1874 #if defined(HAVE_SETRLIMIT)
1877 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1878 fatal_error ("getting core file size maximum limit: %m");
1879 rlim
.rlim_cur
= rlim
.rlim_max
;
1880 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1881 fatal_error ("setting core file size limit to maximum: %m");
1884 diagnostic_abort_on_error (dc
);
1887 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1888 diagnostic context DC. */
1891 decode_d_option (const char *arg
, struct gcc_options
*opts
,
1892 location_t loc
, diagnostic_context
*dc
)
1900 opts
->x_flag_debug_asm
= 1;
1903 opts
->x_flag_print_asm_name
= 1;
1906 opts
->x_flag_dump_rtl_in_asm
= 1;
1907 opts
->x_flag_print_asm_name
= 1;
1910 opts
->x_graph_dump_format
= vcg
;
1913 opts
->x_rtl_dump_and_exit
= 1;
1915 case 'D': /* These are handled by the preprocessor. */
1922 setup_core_dumping (dc
);
1925 opts
->x_flag_dump_all_passed
= true;
1929 warning_at (loc
, 0, "unrecognized gcc debugging option: %c", c
);
1934 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1935 mask LANG_MASK, option handlers HANDLERS) as an error for option
1936 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1937 NULL), location LOC. This is used by -Werror=. */
1940 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
,
1941 const struct cl_option_handlers
*handlers
,
1942 struct gcc_options
*opts
,
1943 struct gcc_options
*opts_set
,
1944 location_t loc
, diagnostic_context
*dc
)
1949 new_option
= XNEWVEC (char, strlen (arg
) + 2);
1950 new_option
[0] = 'W';
1951 strcpy (new_option
+ 1, arg
);
1952 option_index
= find_opt (new_option
, lang_mask
);
1953 if (option_index
== OPT_SPECIAL_unknown
)
1955 error_at (loc
, "-Werror=%s: no option -%s", arg
, new_option
);
1959 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
1961 control_warning_option (option_index
, (int) kind
, value
,
1963 handlers
, opts
, opts_set
, dc
);
1968 /* Return malloced memory for the name of the option OPTION_INDEX
1969 which enabled a diagnostic (context CONTEXT), originally of type
1970 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
1974 option_name (diagnostic_context
*context
, int option_index
,
1975 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
1979 /* A warning classified as an error. */
1980 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
1981 && diag_kind
== DK_ERROR
)
1982 return concat (cl_options
[OPT_Werror_
].opt_text
,
1983 /* Skip over "-W". */
1984 cl_options
[option_index
].opt_text
+ 2,
1986 /* A warning with option. */
1988 return xstrdup (cl_options
[option_index
].opt_text
);
1990 /* A warning without option classified as an error. */
1991 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
1992 || diag_kind
== DK_WARNING
)
1994 if (context
->warning_as_error_requested
)
1995 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
1997 return xstrdup (_("enabled by default"));