[AArch64 3/3 big.LITTLE] Add support for -mcpu=cortex-a57.cortex-a53
[official-gcc.git] / gcc / opts.c
blob5be03faa703508afd00c11c6c03e9ddf974447d0
1 /* Command line option handling.
2 Copyright (C) 2002-2013 Free Software Foundation, Inc.
3 Contributed by Neil Booth.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 #include "config.h"
22 #include "system.h"
23 #include "intl.h"
24 #include "coretypes.h"
25 #include "opts.h"
26 #include "options.h"
27 #include "tm.h" /* For STACK_CHECK_BUILTIN,
28 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
29 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
30 #include "flags.h"
31 #include "params.h"
32 #include "diagnostic.h"
33 #include "diagnostic-color.h"
34 #include "opts-diagnostic.h"
35 #include "insn-attr-common.h"
36 #include "common/common-target.h"
38 static void set_Wstrict_aliasing (struct gcc_options *opts, int onoff);
40 /* Indexed by enum debug_info_type. */
41 const char *const debug_type_names[] =
43 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
46 /* Parse the -femit-struct-debug-detailed option value
47 and set the flag variables. */
49 #define MATCH( prefix, string ) \
50 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
51 ? ((string += sizeof prefix - 1), 1) : 0)
53 void
54 set_struct_debug_option (struct gcc_options *opts, location_t loc,
55 const char *spec)
57 /* various labels for comparison */
58 static const char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
59 static const char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
60 static const char none_lbl[] = "none", any_lbl[] = "any";
61 static const char base_lbl[] = "base", sys_lbl[] = "sys";
63 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
64 /* Default is to apply to as much as possible. */
65 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
66 int ord = 1, gen = 1;
68 /* What usage? */
69 if (MATCH (dfn_lbl, spec))
70 usage = DINFO_USAGE_DFN;
71 else if (MATCH (dir_lbl, spec))
72 usage = DINFO_USAGE_DIR_USE;
73 else if (MATCH (ind_lbl, spec))
74 usage = DINFO_USAGE_IND_USE;
76 /* Generics or not? */
77 if (MATCH (ord_lbl, spec))
78 gen = 0;
79 else if (MATCH (gen_lbl, spec))
80 ord = 0;
82 /* What allowable environment? */
83 if (MATCH (none_lbl, spec))
84 files = DINFO_STRUCT_FILE_NONE;
85 else if (MATCH (any_lbl, spec))
86 files = DINFO_STRUCT_FILE_ANY;
87 else if (MATCH (sys_lbl, spec))
88 files = DINFO_STRUCT_FILE_SYS;
89 else if (MATCH (base_lbl, spec))
90 files = DINFO_STRUCT_FILE_BASE;
91 else
92 error_at (loc,
93 "argument %qs to %<-femit-struct-debug-detailed%> "
94 "not recognized",
95 spec);
97 /* Effect the specification. */
98 if (usage == DINFO_USAGE_NUM_ENUMS)
100 if (ord)
102 opts->x_debug_struct_ordinary[DINFO_USAGE_DFN] = files;
103 opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
104 opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
106 if (gen)
108 opts->x_debug_struct_generic[DINFO_USAGE_DFN] = files;
109 opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
110 opts->x_debug_struct_generic[DINFO_USAGE_IND_USE] = files;
113 else
115 if (ord)
116 opts->x_debug_struct_ordinary[usage] = files;
117 if (gen)
118 opts->x_debug_struct_generic[usage] = files;
121 if (*spec == ',')
122 set_struct_debug_option (opts, loc, spec+1);
123 else
125 /* No more -femit-struct-debug-detailed specifications.
126 Do final checks. */
127 if (*spec != '\0')
128 error_at (loc,
129 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
130 spec);
131 if (opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE]
132 < opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE]
133 || opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE]
134 < opts->x_debug_struct_generic[DINFO_USAGE_IND_USE])
135 error_at (loc,
136 "%<-femit-struct-debug-detailed=dir:...%> must allow "
137 "at least as much as "
138 "%<-femit-struct-debug-detailed=ind:...%>");
142 /* Strip off a legitimate source ending from the input string NAME of
143 length LEN. Rather than having to know the names used by all of
144 our front ends, we strip off an ending of a period followed by
145 up to five characters. (Java uses ".class".) */
147 void
148 strip_off_ending (char *name, int len)
150 int i;
151 for (i = 2; i < 6 && len > i; i++)
153 if (name[len - i] == '.')
155 name[len - i] = '\0';
156 break;
161 /* Find the base name of a path, stripping off both directories and
162 a single final extension. */
164 base_of_path (const char *path, const char **base_out)
166 const char *base = path;
167 const char *dot = 0;
168 const char *p = path;
169 char c = *p;
170 while (c)
172 if (IS_DIR_SEPARATOR (c))
174 base = p + 1;
175 dot = 0;
177 else if (c == '.')
178 dot = p;
179 c = *++p;
181 if (!dot)
182 dot = p;
183 *base_out = base;
184 return dot - base;
187 /* What to print when a switch has no documentation. */
188 static const char undocumented_msg[] = N_("This switch lacks documentation");
190 typedef char *char_p; /* For DEF_VEC_P. */
192 static void handle_param (struct gcc_options *opts,
193 struct gcc_options *opts_set, location_t loc,
194 const char *carg);
195 static void set_debug_level (enum debug_info_type type, int extended,
196 const char *arg, struct gcc_options *opts,
197 struct gcc_options *opts_set,
198 location_t loc);
199 static void set_fast_math_flags (struct gcc_options *opts, int set);
200 static void decode_d_option (const char *arg, struct gcc_options *opts,
201 location_t loc, diagnostic_context *dc);
202 static void set_unsafe_math_optimizations_flags (struct gcc_options *opts,
203 int set);
204 static void enable_warning_as_error (const char *arg, int value,
205 unsigned int lang_mask,
206 const struct cl_option_handlers *handlers,
207 struct gcc_options *opts,
208 struct gcc_options *opts_set,
209 location_t loc,
210 diagnostic_context *dc);
212 /* Handle a back-end option; arguments and return value as for
213 handle_option. */
215 bool
216 target_handle_option (struct gcc_options *opts,
217 struct gcc_options *opts_set,
218 const struct cl_decoded_option *decoded,
219 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
220 location_t loc,
221 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
222 diagnostic_context *dc)
224 gcc_assert (dc == global_dc);
225 gcc_assert (kind == DK_UNSPECIFIED);
226 return targetm_common.handle_option (opts, opts_set, decoded, loc);
229 /* Add comma-separated strings to a char_p vector. */
231 static void
232 add_comma_separated_to_vector (void **pvec, const char *arg)
234 char *tmp;
235 char *r;
236 char *w;
237 char *token_start;
238 vec<char_p> *v = (vec<char_p> *) *pvec;
240 vec_check_alloc (v, 1);
242 /* We never free this string. */
243 tmp = xstrdup (arg);
245 r = tmp;
246 w = tmp;
247 token_start = tmp;
249 while (*r != '\0')
251 if (*r == ',')
253 *w++ = '\0';
254 ++r;
255 v->safe_push (token_start);
256 token_start = w;
258 if (*r == '\\' && r[1] == ',')
260 *w++ = ',';
261 r += 2;
263 else
264 *w++ = *r++;
266 if (*token_start != '\0')
267 v->safe_push (token_start);
269 *pvec = v;
272 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
274 void
275 init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set)
277 size_t num_params = get_num_compiler_params ();
279 gcc_obstack_init (&opts_obstack);
281 *opts = global_options_init;
283 if (opts_set)
284 memset (opts_set, 0, sizeof (*opts_set));
286 opts->x_param_values = XNEWVEC (int, num_params);
288 if (opts_set)
289 opts_set->x_param_values = XCNEWVEC (int, num_params);
291 init_param_values (opts->x_param_values);
293 /* Initialize whether `char' is signed. */
294 opts->x_flag_signed_char = DEFAULT_SIGNED_CHAR;
295 /* Set this to a special "uninitialized" value. The actual default
296 is set after target options have been processed. */
297 opts->x_flag_short_enums = 2;
299 /* Initialize target_flags before default_options_optimization
300 so the latter can modify it. */
301 opts->x_target_flags = targetm_common.default_target_flags;
303 /* Some targets have ABI-specified unwind tables. */
304 opts->x_flag_unwind_tables = targetm_common.unwind_tables_default;
306 /* Some targets have other target-specific initialization. */
307 targetm_common.option_init_struct (opts);
310 /* If indicated by the optimization level LEVEL (-Os if SIZE is set,
311 -Ofast if FAST is set, -Og if DEBUG is set), apply the option DEFAULT_OPT
312 to OPTS and OPTS_SET, diagnostic context DC, location LOC, with language
313 mask LANG_MASK and option handlers HANDLERS. */
315 static void
316 maybe_default_option (struct gcc_options *opts,
317 struct gcc_options *opts_set,
318 const struct default_options *default_opt,
319 int level, bool size, bool fast, bool debug,
320 unsigned int lang_mask,
321 const struct cl_option_handlers *handlers,
322 location_t loc,
323 diagnostic_context *dc)
325 const struct cl_option *option = &cl_options[default_opt->opt_index];
326 bool enabled;
328 if (size)
329 gcc_assert (level == 2);
330 if (fast)
331 gcc_assert (level == 3);
332 if (debug)
333 gcc_assert (level == 1);
335 switch (default_opt->levels)
337 case OPT_LEVELS_ALL:
338 enabled = true;
339 break;
341 case OPT_LEVELS_0_ONLY:
342 enabled = (level == 0);
343 break;
345 case OPT_LEVELS_1_PLUS:
346 enabled = (level >= 1);
347 break;
349 case OPT_LEVELS_1_PLUS_SPEED_ONLY:
350 enabled = (level >= 1 && !size && !debug);
351 break;
353 case OPT_LEVELS_1_PLUS_NOT_DEBUG:
354 enabled = (level >= 1 && !debug);
355 break;
357 case OPT_LEVELS_2_PLUS:
358 enabled = (level >= 2);
359 break;
361 case OPT_LEVELS_2_PLUS_SPEED_ONLY:
362 enabled = (level >= 2 && !size && !debug);
363 break;
365 case OPT_LEVELS_3_PLUS:
366 enabled = (level >= 3);
367 break;
369 case OPT_LEVELS_3_PLUS_AND_SIZE:
370 enabled = (level >= 3 || size);
371 break;
373 case OPT_LEVELS_SIZE:
374 enabled = size;
375 break;
377 case OPT_LEVELS_FAST:
378 enabled = fast;
379 break;
381 case OPT_LEVELS_NONE:
382 default:
383 gcc_unreachable ();
386 if (enabled)
387 handle_generated_option (opts, opts_set, default_opt->opt_index,
388 default_opt->arg, default_opt->value,
389 lang_mask, DK_UNSPECIFIED, loc,
390 handlers, dc);
391 else if (default_opt->arg == NULL
392 && !option->cl_reject_negative)
393 handle_generated_option (opts, opts_set, default_opt->opt_index,
394 default_opt->arg, !default_opt->value,
395 lang_mask, DK_UNSPECIFIED, loc,
396 handlers, dc);
399 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
400 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
401 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
402 language mask LANG_MASK and option handlers HANDLERS. */
404 static void
405 maybe_default_options (struct gcc_options *opts,
406 struct gcc_options *opts_set,
407 const struct default_options *default_opts,
408 int level, bool size, bool fast, bool debug,
409 unsigned int lang_mask,
410 const struct cl_option_handlers *handlers,
411 location_t loc,
412 diagnostic_context *dc)
414 size_t i;
416 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++)
417 maybe_default_option (opts, opts_set, &default_opts[i],
418 level, size, fast, debug,
419 lang_mask, handlers, loc, dc);
422 /* Table of options enabled by default at different levels. */
424 static const struct default_options default_options_table[] =
426 /* -O1 optimizations. */
427 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
428 #ifdef DELAY_SLOTS
429 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 },
430 #endif
431 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
432 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
433 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
434 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 },
435 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 },
436 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
437 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
438 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
439 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
440 { OPT_LEVELS_1_PLUS, OPT_fshrink_wrap, NULL, 1 },
441 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
442 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
443 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 },
444 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
445 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
446 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
447 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
448 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_ftree_sra, NULL, 1 },
449 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 },
450 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
451 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
452 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
453 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
454 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
455 { OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
456 { OPT_LEVELS_1_PLUS, OPT_ftree_slsr, NULL, 1 },
458 /* -O2 optimizations. */
459 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
460 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
461 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
462 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
463 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
464 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
465 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
466 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
467 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
468 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
469 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
470 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
471 #ifdef INSN_SCHEDULING
472 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
473 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
474 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
475 #endif
476 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
477 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
478 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
479 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
480 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
481 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
482 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
483 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
484 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
485 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
486 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize_speculatively, NULL, 1 },
487 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
488 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 },
489 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 },
490 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 },
491 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 },
492 { OPT_LEVELS_2_PLUS, OPT_ftree_tail_merge, NULL, 1 },
493 { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
494 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_foptimize_strlen, NULL, 1 },
495 { OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 },
496 { OPT_LEVELS_2_PLUS, OPT_fipa_sem_equality, NULL, 1 },
497 { OPT_LEVELS_2_PLUS, OPT_fisolate_erroneous_paths_dereference, NULL, 1 },
499 /* -O3 optimizations. */
500 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
501 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
502 /* Inlining of functions reducing size is a good idea with -Os
503 regardless of them being declared inline. */
504 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
505 { OPT_LEVELS_1_PLUS_NOT_DEBUG, OPT_finline_functions_called_once, NULL, 1 },
506 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
507 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
508 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_vectorize, NULL, 1 },
509 { OPT_LEVELS_3_PLUS, OPT_ftree_slp_vectorize, NULL, 1 },
510 { OPT_LEVELS_3_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_DYNAMIC },
511 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
512 { OPT_LEVELS_3_PLUS, OPT_ftree_partial_pre, NULL, 1 },
514 /* -Ofast adds optimizations to -O3. */
515 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
517 { OPT_LEVELS_NONE, 0, NULL, 0 }
520 /* Default the options in OPTS and OPTS_SET based on the optimization
521 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
522 void
523 default_options_optimization (struct gcc_options *opts,
524 struct gcc_options *opts_set,
525 struct cl_decoded_option *decoded_options,
526 unsigned int decoded_options_count,
527 location_t loc,
528 unsigned int lang_mask,
529 const struct cl_option_handlers *handlers,
530 diagnostic_context *dc)
532 unsigned int i;
533 int opt2;
535 /* Scan to see what optimization level has been specified. That will
536 determine the default value of many flags. */
537 for (i = 1; i < decoded_options_count; i++)
539 struct cl_decoded_option *opt = &decoded_options[i];
540 switch (opt->opt_index)
542 case OPT_O:
543 if (*opt->arg == '\0')
545 opts->x_optimize = 1;
546 opts->x_optimize_size = 0;
547 opts->x_optimize_fast = 0;
548 opts->x_optimize_debug = 0;
550 else
552 const int optimize_val = integral_argument (opt->arg);
553 if (optimize_val == -1)
554 error_at (loc, "argument to %<-O%> should be a non-negative "
555 "integer, %<g%>, %<s%> or %<fast%>");
556 else
558 opts->x_optimize = optimize_val;
559 if ((unsigned int) opts->x_optimize > 255)
560 opts->x_optimize = 255;
561 opts->x_optimize_size = 0;
562 opts->x_optimize_fast = 0;
563 opts->x_optimize_debug = 0;
566 break;
568 case OPT_Os:
569 opts->x_optimize_size = 1;
571 /* Optimizing for size forces optimize to be 2. */
572 opts->x_optimize = 2;
573 opts->x_optimize_fast = 0;
574 opts->x_optimize_debug = 0;
575 break;
577 case OPT_Ofast:
578 /* -Ofast only adds flags to -O3. */
579 opts->x_optimize_size = 0;
580 opts->x_optimize = 3;
581 opts->x_optimize_fast = 1;
582 opts->x_optimize_debug = 0;
583 break;
585 case OPT_Og:
586 /* -Og selects optimization level 1. */
587 opts->x_optimize_size = 0;
588 opts->x_optimize = 1;
589 opts->x_optimize_fast = 0;
590 opts->x_optimize_debug = 1;
591 break;
593 default:
594 /* Ignore other options in this prescan. */
595 break;
599 maybe_default_options (opts, opts_set, default_options_table,
600 opts->x_optimize, opts->x_optimize_size,
601 opts->x_optimize_fast, opts->x_optimize_debug,
602 lang_mask, handlers, loc, dc);
604 /* -O2 param settings. */
605 opt2 = (opts->x_optimize >= 2);
607 /* Track fields in field-sensitive alias analysis. */
608 maybe_set_param_value
609 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
610 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE),
611 opts->x_param_values, opts_set->x_param_values);
613 /* For -O1 only do loop invariant motion for very small loops. */
614 maybe_set_param_value
615 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
616 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000,
617 opts->x_param_values, opts_set->x_param_values);
619 if (opts->x_optimize_size)
620 /* We want to crossjump as much as possible. */
621 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1,
622 opts->x_param_values, opts_set->x_param_values);
623 else
624 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS,
625 default_param_value (PARAM_MIN_CROSSJUMP_INSNS),
626 opts->x_param_values, opts_set->x_param_values);
628 /* Allow default optimizations to be specified on a per-machine basis. */
629 maybe_default_options (opts, opts_set,
630 targetm_common.option_optimization_table,
631 opts->x_optimize, opts->x_optimize_size,
632 opts->x_optimize_fast, opts->x_optimize_debug,
633 lang_mask, handlers, loc, dc);
636 /* After all options at LOC have been read into OPTS and OPTS_SET,
637 finalize settings of those options and diagnose incompatible
638 combinations. */
639 void
640 finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
641 location_t loc)
643 enum unwind_info_type ui_except;
645 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name))
647 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
648 OPTS->X_DUMP_DIR_NAME directory. Then try to make
649 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
650 directory, typically the directory to contain the object
651 file. */
652 if (opts->x_dump_dir_name)
653 opts->x_dump_base_name = opts_concat (opts->x_dump_dir_name,
654 opts->x_dump_base_name, NULL);
655 else if (opts->x_aux_base_name
656 && strcmp (opts->x_aux_base_name, HOST_BIT_BUCKET) != 0)
658 const char *aux_base;
660 base_of_path (opts->x_aux_base_name, &aux_base);
661 if (opts->x_aux_base_name != aux_base)
663 int dir_len = aux_base - opts->x_aux_base_name;
664 char *new_dump_base_name
665 = XOBNEWVEC (&opts_obstack, char,
666 strlen (opts->x_dump_base_name) + dir_len + 1);
668 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
669 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len);
670 /* Append existing OPTS->X_DUMP_BASE_NAME. */
671 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name);
672 opts->x_dump_base_name = new_dump_base_name;
677 /* Handle related options for unit-at-a-time, toplevel-reorder, and
678 section-anchors. */
679 if (!opts->x_flag_unit_at_a_time)
681 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
682 error_at (loc, "section anchors must be disabled when unit-at-a-time "
683 "is disabled");
684 opts->x_flag_section_anchors = 0;
685 if (opts->x_flag_toplevel_reorder == 1)
686 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time "
687 "is disabled");
688 opts->x_flag_toplevel_reorder = 0;
691 if (opts->x_flag_tm && opts->x_flag_non_call_exceptions)
692 sorry ("transactional memory is not supported with non-call exceptions");
694 /* Unless the user has asked for section anchors, we disable toplevel
695 reordering at -O0 to disable transformations that might be surprising
696 to end users and to get -fno-toplevel-reorder tested. */
697 if (!opts->x_optimize
698 && opts->x_flag_toplevel_reorder == 2
699 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors))
701 opts->x_flag_toplevel_reorder = 0;
702 opts->x_flag_section_anchors = 0;
704 if (!opts->x_flag_toplevel_reorder)
706 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
707 error_at (loc, "section anchors must be disabled when toplevel reorder"
708 " is disabled");
709 opts->x_flag_section_anchors = 0;
712 if (!opts->x_flag_opts_finished)
714 if (opts->x_flag_pie)
715 opts->x_flag_pic = opts->x_flag_pie;
716 if (opts->x_flag_pic && !opts->x_flag_pie)
717 opts->x_flag_shlib = 1;
718 opts->x_flag_opts_finished = true;
721 if (opts->x_optimize == 0)
723 /* Inlining does not work if not optimizing,
724 so force it not to be done. */
725 opts->x_warn_inline = 0;
726 opts->x_flag_no_inline = 1;
729 /* The optimization to partition hot and cold basic blocks into separate
730 sections of the .o and executable files does not work (currently)
731 with exception handling. This is because there is no support for
732 generating unwind info. If opts->x_flag_exceptions is turned on
733 we need to turn off the partitioning optimization. */
735 ui_except = targetm_common.except_unwind_info (opts);
737 if (opts->x_flag_exceptions
738 && opts->x_flag_reorder_blocks_and_partition
739 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))
741 if (opts_set->x_flag_reorder_blocks_and_partition)
742 inform (loc,
743 "-freorder-blocks-and-partition does not work "
744 "with exceptions on this architecture");
745 opts->x_flag_reorder_blocks_and_partition = 0;
746 opts->x_flag_reorder_blocks = 1;
749 /* If user requested unwind info, then turn off the partitioning
750 optimization. */
752 if (opts->x_flag_unwind_tables
753 && !targetm_common.unwind_tables_default
754 && opts->x_flag_reorder_blocks_and_partition
755 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))
757 if (opts_set->x_flag_reorder_blocks_and_partition)
758 inform (loc,
759 "-freorder-blocks-and-partition does not support "
760 "unwind info on this architecture");
761 opts->x_flag_reorder_blocks_and_partition = 0;
762 opts->x_flag_reorder_blocks = 1;
765 /* If the target requested unwind info, then turn off the partitioning
766 optimization with a different message. Likewise, if the target does not
767 support named sections. */
769 if (opts->x_flag_reorder_blocks_and_partition
770 && (!targetm_common.have_named_sections
771 || (opts->x_flag_unwind_tables
772 && targetm_common.unwind_tables_default
773 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))))
775 if (opts_set->x_flag_reorder_blocks_and_partition)
776 inform (loc,
777 "-freorder-blocks-and-partition does not work "
778 "on this architecture");
779 opts->x_flag_reorder_blocks_and_partition = 0;
780 opts->x_flag_reorder_blocks = 1;
783 if (opts->x_flag_reorder_blocks_and_partition
784 && !opts_set->x_flag_reorder_functions)
785 opts->x_flag_reorder_functions = 1;
787 /* Pipelining of outer loops is only possible when general pipelining
788 capabilities are requested. */
789 if (!opts->x_flag_sel_sched_pipelining)
790 opts->x_flag_sel_sched_pipelining_outer_loops = 0;
792 if (opts->x_flag_conserve_stack)
794 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100,
795 opts->x_param_values, opts_set->x_param_values);
796 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40,
797 opts->x_param_values, opts_set->x_param_values);
800 if (opts->x_flag_lto)
802 #ifdef ENABLE_LTO
803 opts->x_flag_generate_lto = 1;
805 /* When generating IL, do not operate in whole-program mode.
806 Otherwise, symbols will be privatized too early, causing link
807 errors later. */
808 opts->x_flag_whole_program = 0;
809 #else
810 error_at (loc, "LTO support has not been enabled in this configuration");
811 #endif
812 if (!opts->x_flag_fat_lto_objects
813 && (!HAVE_LTO_PLUGIN
814 || (opts_set->x_flag_use_linker_plugin
815 && !opts->x_flag_use_linker_plugin)))
817 if (opts_set->x_flag_fat_lto_objects)
818 error_at (loc, "-fno-fat-lto-objects are supported only with linker plugin");
819 opts->x_flag_fat_lto_objects = 1;
822 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
823 + (opts->x_flag_lto_partition_none != 0) >= 1)
825 if ((opts->x_flag_lto_partition_balanced != 0)
826 + (opts->x_flag_lto_partition_1to1 != 0)
827 + (opts->x_flag_lto_partition_none != 0) > 1)
828 error_at (loc, "only one -flto-partition value can be specified");
831 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
832 default value if they choose based on other options. */
833 if (opts->x_flag_split_stack == -1)
834 opts->x_flag_split_stack = 0;
835 else if (opts->x_flag_split_stack)
837 if (!targetm_common.supports_split_stack (true, opts))
839 error_at (loc, "%<-fsplit-stack%> is not supported by "
840 "this compiler configuration");
841 opts->x_flag_split_stack = 0;
845 /* Tune vectorization related parametees according to cost model. */
846 if (opts->x_flag_vect_cost_model == VECT_COST_MODEL_CHEAP)
848 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIAS_CHECKS,
849 6, opts->x_param_values, opts_set->x_param_values);
850 maybe_set_param_value (PARAM_VECT_MAX_VERSION_FOR_ALIGNMENT_CHECKS,
851 0, opts->x_param_values, opts_set->x_param_values);
852 maybe_set_param_value (PARAM_VECT_MAX_PEELING_FOR_ALIGNMENT,
853 0, opts->x_param_values, opts_set->x_param_values);
856 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
857 is disabled. */
858 if ((!opts->x_flag_tree_loop_vectorize && !opts->x_flag_tree_slp_vectorize)
859 || !opts->x_flag_tree_loop_if_convert)
860 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK, 0,
861 opts->x_param_values, opts_set->x_param_values);
863 /* The -gsplit-dwarf option requires -gpubnames. */
864 if (opts->x_dwarf_split_debug_info)
865 opts->x_debug_generate_pub_sections = 1;
868 #define LEFT_COLUMN 27
870 /* Output ITEM, of length ITEM_WIDTH, in the left column,
871 followed by word-wrapped HELP in a second column. */
872 static void
873 wrap_help (const char *help,
874 const char *item,
875 unsigned int item_width,
876 unsigned int columns)
878 unsigned int col_width = LEFT_COLUMN;
879 unsigned int remaining, room, len;
881 remaining = strlen (help);
885 room = columns - 3 - MAX (col_width, item_width);
886 if (room > columns)
887 room = 0;
888 len = remaining;
890 if (room < len)
892 unsigned int i;
894 for (i = 0; help[i]; i++)
896 if (i >= room && len != remaining)
897 break;
898 if (help[i] == ' ')
899 len = i;
900 else if ((help[i] == '-' || help[i] == '/')
901 && help[i + 1] != ' '
902 && i > 0 && ISALPHA (help[i - 1]))
903 len = i + 1;
907 printf (" %-*.*s %.*s\n", col_width, item_width, item, len, help);
908 item_width = 0;
909 while (help[len] == ' ')
910 len++;
911 help += len;
912 remaining -= len;
914 while (remaining);
917 /* Print help for a specific front-end, etc. */
918 static void
919 print_filtered_help (unsigned int include_flags,
920 unsigned int exclude_flags,
921 unsigned int any_flags,
922 unsigned int columns,
923 struct gcc_options *opts,
924 unsigned int lang_mask)
926 unsigned int i;
927 const char *help;
928 bool found = false;
929 bool displayed = false;
931 if (include_flags == CL_PARAMS)
933 for (i = 0; i < LAST_PARAM; i++)
935 const char *param = compiler_params[i].option;
937 help = compiler_params[i].help;
938 if (help == NULL || *help == '\0')
940 if (exclude_flags & CL_UNDOCUMENTED)
941 continue;
942 help = undocumented_msg;
945 /* Get the translation. */
946 help = _(help);
948 wrap_help (help, param, strlen (param), columns);
950 putchar ('\n');
951 return;
954 if (!opts->x_help_printed)
955 opts->x_help_printed = XCNEWVAR (char, cl_options_count);
957 if (!opts->x_help_enum_printed)
958 opts->x_help_enum_printed = XCNEWVAR (char, cl_enums_count);
960 for (i = 0; i < cl_options_count; i++)
962 char new_help[128];
963 const struct cl_option *option = cl_options + i;
964 unsigned int len;
965 const char *opt;
966 const char *tab;
968 if (include_flags == 0
969 || ((option->flags & include_flags) != include_flags))
971 if ((option->flags & any_flags) == 0)
972 continue;
975 /* Skip unwanted switches. */
976 if ((option->flags & exclude_flags) != 0)
977 continue;
979 /* The driver currently prints its own help text. */
980 if ((option->flags & CL_DRIVER) != 0
981 && (option->flags & (((1U << cl_lang_count) - 1)
982 | CL_COMMON | CL_TARGET)) == 0)
983 continue;
985 found = true;
986 /* Skip switches that have already been printed. */
987 if (opts->x_help_printed[i])
988 continue;
990 opts->x_help_printed[i] = true;
992 help = option->help;
993 if (help == NULL)
995 if (exclude_flags & CL_UNDOCUMENTED)
996 continue;
997 help = undocumented_msg;
1000 /* Get the translation. */
1001 help = _(help);
1003 /* Find the gap between the name of the
1004 option and its descriptive text. */
1005 tab = strchr (help, '\t');
1006 if (tab)
1008 len = tab - help;
1009 opt = help;
1010 help = tab + 1;
1012 else
1014 opt = option->opt_text;
1015 len = strlen (opt);
1018 /* With the -Q option enabled we change the descriptive text associated
1019 with an option to be an indication of its current setting. */
1020 if (!opts->x_quiet_flag)
1022 void *flag_var = option_flag_var (i, opts);
1024 if (len < (LEFT_COLUMN + 2))
1025 strcpy (new_help, "\t\t");
1026 else
1027 strcpy (new_help, "\t");
1029 if (flag_var != NULL
1030 && option->var_type != CLVC_DEFER)
1032 if (option->flags & CL_JOINED)
1034 if (option->var_type == CLVC_STRING)
1036 if (* (const char **) flag_var != NULL)
1037 snprintf (new_help + strlen (new_help),
1038 sizeof (new_help) - strlen (new_help),
1039 * (const char **) flag_var);
1041 else if (option->var_type == CLVC_ENUM)
1043 const struct cl_enum *e = &cl_enums[option->var_enum];
1044 int value;
1045 const char *arg = NULL;
1047 value = e->get (flag_var);
1048 enum_value_to_arg (e->values, &arg, value, lang_mask);
1049 if (arg == NULL)
1050 arg = _("[default]");
1051 snprintf (new_help + strlen (new_help),
1052 sizeof (new_help) - strlen (new_help),
1053 arg);
1055 else
1056 sprintf (new_help + strlen (new_help),
1057 "%#x", * (int *) flag_var);
1059 else
1060 strcat (new_help, option_enabled (i, opts)
1061 ? _("[enabled]") : _("[disabled]"));
1064 help = new_help;
1067 wrap_help (help, opt, len, columns);
1068 displayed = true;
1070 if (option->var_type == CLVC_ENUM
1071 && opts->x_help_enum_printed[option->var_enum] != 2)
1072 opts->x_help_enum_printed[option->var_enum] = 1;
1075 if (! found)
1077 unsigned int langs = include_flags & CL_LANG_ALL;
1079 if (langs == 0)
1080 printf (_(" No options with the desired characteristics were found\n"));
1081 else
1083 unsigned int i;
1085 /* PR 31349: Tell the user how to see all of the
1086 options supported by a specific front end. */
1087 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1088 if ((1U << i) & langs)
1089 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1090 lang_names[i], lang_names[i]);
1094 else if (! displayed)
1095 printf (_(" All options with the desired characteristics have already been displayed\n"));
1097 putchar ('\n');
1099 /* Print details of enumerated option arguments, if those
1100 enumerations have help text headings provided. If no help text
1101 is provided, presume that the possible values are listed in the
1102 help text for the relevant options. */
1103 for (i = 0; i < cl_enums_count; i++)
1105 unsigned int j, pos;
1107 if (opts->x_help_enum_printed[i] != 1)
1108 continue;
1109 if (cl_enums[i].help == NULL)
1110 continue;
1111 printf (" %s\n ", _(cl_enums[i].help));
1112 pos = 4;
1113 for (j = 0; cl_enums[i].values[j].arg != NULL; j++)
1115 unsigned int len = strlen (cl_enums[i].values[j].arg);
1117 if (pos > 4 && pos + 1 + len <= columns)
1119 printf (" %s", cl_enums[i].values[j].arg);
1120 pos += 1 + len;
1122 else
1124 if (pos > 4)
1126 printf ("\n ");
1127 pos = 4;
1129 printf ("%s", cl_enums[i].values[j].arg);
1130 pos += len;
1133 printf ("\n\n");
1134 opts->x_help_enum_printed[i] = 2;
1138 /* Display help for a specified type of option.
1139 The options must have ALL of the INCLUDE_FLAGS set
1140 ANY of the flags in the ANY_FLAGS set
1141 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1142 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1143 static void
1144 print_specific_help (unsigned int include_flags,
1145 unsigned int exclude_flags,
1146 unsigned int any_flags,
1147 struct gcc_options *opts,
1148 unsigned int lang_mask)
1150 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1151 const char * description = NULL;
1152 const char * descrip_extra = "";
1153 size_t i;
1154 unsigned int flag;
1156 /* Sanity check: Make sure that we do not have more
1157 languages than we have bits available to enumerate them. */
1158 gcc_assert ((1U << cl_lang_count) <= CL_MIN_OPTION_CLASS);
1160 /* If we have not done so already, obtain
1161 the desired maximum width of the output. */
1162 if (opts->x_help_columns == 0)
1164 const char *p;
1166 p = getenv ("COLUMNS");
1167 if (p != NULL)
1169 int value = atoi (p);
1171 if (value > 0)
1172 opts->x_help_columns = value;
1175 if (opts->x_help_columns == 0)
1176 /* Use a reasonable default. */
1177 opts->x_help_columns = 80;
1180 /* Decide upon the title for the options that we are going to display. */
1181 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1183 switch (flag & include_flags)
1185 case 0:
1186 case CL_DRIVER:
1187 break;
1189 case CL_TARGET:
1190 description = _("The following options are target specific");
1191 break;
1192 case CL_WARNING:
1193 description = _("The following options control compiler warning messages");
1194 break;
1195 case CL_OPTIMIZATION:
1196 description = _("The following options control optimizations");
1197 break;
1198 case CL_COMMON:
1199 description = _("The following options are language-independent");
1200 break;
1201 case CL_PARAMS:
1202 description = _("The --param option recognizes the following as parameters");
1203 break;
1204 default:
1205 if (i >= cl_lang_count)
1206 break;
1207 if (exclude_flags & all_langs_mask)
1208 description = _("The following options are specific to just the language ");
1209 else
1210 description = _("The following options are supported by the language ");
1211 descrip_extra = lang_names [i];
1212 break;
1216 if (description == NULL)
1218 if (any_flags == 0)
1220 if (include_flags & CL_UNDOCUMENTED)
1221 description = _("The following options are not documented");
1222 else if (include_flags & CL_SEPARATE)
1223 description = _("The following options take separate arguments");
1224 else if (include_flags & CL_JOINED)
1225 description = _("The following options take joined arguments");
1226 else
1228 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1229 include_flags);
1230 return;
1233 else
1235 if (any_flags & all_langs_mask)
1236 description = _("The following options are language-related");
1237 else
1238 description = _("The following options are language-independent");
1242 printf ("%s%s:\n", description, descrip_extra);
1243 print_filtered_help (include_flags, exclude_flags, any_flags,
1244 opts->x_help_columns, opts, lang_mask);
1247 /* Handle target- and language-independent options. Return zero to
1248 generate an "unknown option" message. Only options that need
1249 extra handling need to be listed here; if you simply want
1250 DECODED->value assigned to a variable, it happens automatically. */
1252 bool
1253 common_handle_option (struct gcc_options *opts,
1254 struct gcc_options *opts_set,
1255 const struct cl_decoded_option *decoded,
1256 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1257 location_t loc,
1258 const struct cl_option_handlers *handlers,
1259 diagnostic_context *dc)
1261 size_t scode = decoded->opt_index;
1262 const char *arg = decoded->arg;
1263 int value = decoded->value;
1264 enum opt_code code = (enum opt_code) scode;
1266 gcc_assert (decoded->canonical_option_num_elements <= 2);
1268 switch (code)
1270 case OPT__param:
1271 handle_param (opts, opts_set, loc, arg);
1272 break;
1274 case OPT__help:
1276 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1277 unsigned int undoc_mask;
1278 unsigned int i;
1280 if (lang_mask == CL_DRIVER)
1281 break;;
1283 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings)
1285 : CL_UNDOCUMENTED);
1286 /* First display any single language specific options. */
1287 for (i = 0; i < cl_lang_count; i++)
1288 print_specific_help
1289 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts,
1290 lang_mask);
1291 /* Next display any multi language specific options. */
1292 print_specific_help (0, undoc_mask, all_langs_mask, opts, lang_mask);
1293 /* Then display any remaining, non-language options. */
1294 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1295 if (i != CL_DRIVER)
1296 print_specific_help (i, undoc_mask, 0, opts, lang_mask);
1297 opts->x_exit_after_options = true;
1298 break;
1301 case OPT__target_help:
1302 if (lang_mask == CL_DRIVER)
1303 break;
1305 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts, lang_mask);
1306 opts->x_exit_after_options = true;
1307 break;
1309 case OPT__help_:
1311 const char * a = arg;
1312 unsigned int include_flags = 0;
1313 /* Note - by default we include undocumented options when listing
1314 specific classes. If you only want to see documented options
1315 then add ",^undocumented" to the --help= option. E.g.:
1317 --help=target,^undocumented */
1318 unsigned int exclude_flags = 0;
1320 if (lang_mask == CL_DRIVER)
1321 break;
1323 /* Walk along the argument string, parsing each word in turn.
1324 The format is:
1325 arg = [^]{word}[,{arg}]
1326 word = {optimizers|target|warnings|undocumented|
1327 params|common|<language>} */
1328 while (* a != 0)
1330 static const struct
1332 const char * string;
1333 unsigned int flag;
1335 specifics[] =
1337 { "optimizers", CL_OPTIMIZATION },
1338 { "target", CL_TARGET },
1339 { "warnings", CL_WARNING },
1340 { "undocumented", CL_UNDOCUMENTED },
1341 { "params", CL_PARAMS },
1342 { "joined", CL_JOINED },
1343 { "separate", CL_SEPARATE },
1344 { "common", CL_COMMON },
1345 { NULL, 0 }
1347 unsigned int * pflags;
1348 const char * comma;
1349 unsigned int lang_flag, specific_flag;
1350 unsigned int len;
1351 unsigned int i;
1353 if (* a == '^')
1355 ++ a;
1356 pflags = & exclude_flags;
1358 else
1359 pflags = & include_flags;
1361 comma = strchr (a, ',');
1362 if (comma == NULL)
1363 len = strlen (a);
1364 else
1365 len = comma - a;
1366 if (len == 0)
1368 a = comma + 1;
1369 continue;
1372 /* Check to see if the string matches an option class name. */
1373 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1374 if (strncasecmp (a, specifics[i].string, len) == 0)
1376 specific_flag = specifics[i].flag;
1377 break;
1380 /* Check to see if the string matches a language name.
1381 Note - we rely upon the alpha-sorted nature of the entries in
1382 the lang_names array, specifically that shorter names appear
1383 before their longer variants. (i.e. C before C++). That way
1384 when we are attempting to match --help=c for example we will
1385 match with C first and not C++. */
1386 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1387 if (strncasecmp (a, lang_names[i], len) == 0)
1389 lang_flag = 1U << i;
1390 break;
1393 if (specific_flag != 0)
1395 if (lang_flag == 0)
1396 * pflags |= specific_flag;
1397 else
1399 /* The option's argument matches both the start of a
1400 language name and the start of an option class name.
1401 We have a special case for when the user has
1402 specified "--help=c", but otherwise we have to issue
1403 a warning. */
1404 if (strncasecmp (a, "c", len) == 0)
1405 * pflags |= lang_flag;
1406 else
1407 warning_at (loc, 0,
1408 "--help argument %q.*s is ambiguous, "
1409 "please be more specific",
1410 len, a);
1413 else if (lang_flag != 0)
1414 * pflags |= lang_flag;
1415 else
1416 warning_at (loc, 0,
1417 "unrecognized argument to --help= option: %q.*s",
1418 len, a);
1420 if (comma == NULL)
1421 break;
1422 a = comma + 1;
1425 if (include_flags)
1426 print_specific_help (include_flags, exclude_flags, 0, opts,
1427 lang_mask);
1428 opts->x_exit_after_options = true;
1429 break;
1432 case OPT__version:
1433 if (lang_mask == CL_DRIVER)
1434 break;
1436 opts->x_exit_after_options = true;
1437 break;
1439 case OPT_fsanitize_:
1441 const char *p = arg;
1442 while (*p != 0)
1444 static const struct
1446 const char *const name;
1447 unsigned int flag;
1448 size_t len;
1449 } spec[] =
1451 { "address", SANITIZE_ADDRESS, sizeof "address" - 1 },
1452 { "thread", SANITIZE_THREAD, sizeof "thread" - 1 },
1453 { "leak", SANITIZE_LEAK, sizeof "leak" - 1 },
1454 { "shift", SANITIZE_SHIFT, sizeof "shift" - 1 },
1455 { "integer-divide-by-zero", SANITIZE_DIVIDE,
1456 sizeof "integer-divide-by-zero" - 1 },
1457 { "undefined", SANITIZE_UNDEFINED, sizeof "undefined" - 1 },
1458 { "unreachable", SANITIZE_UNREACHABLE,
1459 sizeof "unreachable" - 1 },
1460 { "vla-bound", SANITIZE_VLA, sizeof "vla-bound" - 1 },
1461 { "return", SANITIZE_RETURN, sizeof "return" - 1 },
1462 { "null", SANITIZE_NULL, sizeof "null" - 1 },
1463 { "signed-integer-overflow", SANITIZE_SI_OVERFLOW,
1464 sizeof "signed-integer-overflow" -1 },
1465 { NULL, 0, 0 }
1467 const char *comma;
1468 size_t len, i;
1469 bool found = false;
1471 comma = strchr (p, ',');
1472 if (comma == NULL)
1473 len = strlen (p);
1474 else
1475 len = comma - p;
1476 if (len == 0)
1478 p = comma + 1;
1479 continue;
1482 /* Check to see if the string matches an option class name. */
1483 for (i = 0; spec[i].name != NULL; ++i)
1484 if (len == spec[i].len
1485 && memcmp (p, spec[i].name, len) == 0)
1487 /* Handle both -fsanitize and -fno-sanitize cases. */
1488 if (value)
1489 flag_sanitize |= spec[i].flag;
1490 else
1491 flag_sanitize &= ~spec[i].flag;
1492 found = true;
1493 break;
1496 if (! found)
1497 warning_at (loc, 0,
1498 "unrecognized argument to -fsanitize= option: %q.*s",
1499 (int) len, p);
1501 if (comma == NULL)
1502 break;
1503 p = comma + 1;
1506 /* When instrumenting the pointers, we don't want to remove
1507 the null pointer checks. */
1508 if (flag_sanitize & SANITIZE_NULL)
1509 opts->x_flag_delete_null_pointer_checks = 0;
1510 break;
1513 case OPT_O:
1514 case OPT_Os:
1515 case OPT_Ofast:
1516 case OPT_Og:
1517 /* Currently handled in a prescan. */
1518 break;
1520 case OPT_Werror:
1521 dc->warning_as_error_requested = value;
1522 break;
1524 case OPT_Werror_:
1525 if (lang_mask == CL_DRIVER)
1526 break;
1528 enable_warning_as_error (arg, value, lang_mask, handlers,
1529 opts, opts_set, loc, dc);
1530 break;
1532 case OPT_Wlarger_than_:
1533 opts->x_larger_than_size = value;
1534 opts->x_warn_larger_than = value != -1;
1535 break;
1537 case OPT_Wfatal_errors:
1538 dc->fatal_errors = value;
1539 break;
1541 case OPT_Wframe_larger_than_:
1542 opts->x_frame_larger_than_size = value;
1543 opts->x_warn_frame_larger_than = value != -1;
1544 break;
1546 case OPT_Wstack_usage_:
1547 opts->x_warn_stack_usage = value;
1548 opts->x_flag_stack_usage_info = value != -1;
1549 break;
1551 case OPT_Wstrict_aliasing:
1552 set_Wstrict_aliasing (opts, value);
1553 break;
1555 case OPT_Wstrict_overflow:
1556 opts->x_warn_strict_overflow = (value
1557 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1558 : 0);
1559 break;
1561 case OPT_Wsystem_headers:
1562 dc->dc_warn_system_headers = value;
1563 break;
1565 case OPT_aux_info:
1566 opts->x_flag_gen_aux_info = 1;
1567 break;
1569 case OPT_auxbase_strip:
1571 char *tmp = xstrdup (arg);
1572 strip_off_ending (tmp, strlen (tmp));
1573 if (tmp[0])
1574 opts->x_aux_base_name = tmp;
1575 else
1576 free (tmp);
1578 break;
1580 case OPT_d:
1581 decode_d_option (arg, opts, loc, dc);
1582 break;
1584 case OPT_fcall_used_:
1585 case OPT_fcall_saved_:
1586 /* Deferred. */
1587 break;
1589 case OPT_fdbg_cnt_:
1590 case OPT_fdbg_cnt_list:
1591 /* Deferred. */
1592 break;
1594 case OPT_fdebug_prefix_map_:
1595 /* Deferred. */
1596 break;
1598 case OPT_fdiagnostics_show_location_:
1599 diagnostic_prefixing_rule (dc) = (diagnostic_prefixing_rule_t) value;
1600 break;
1602 case OPT_fdiagnostics_show_caret:
1603 dc->show_caret = value;
1604 break;
1606 case OPT_fdiagnostics_color_:
1607 pp_show_color (dc->printer)
1608 = colorize_init ((diagnostic_color_rule_t) value);
1609 break;
1611 case OPT_fdiagnostics_show_option:
1612 dc->show_option_requested = value;
1613 break;
1615 case OPT_fdump_:
1616 /* Deferred. */
1617 break;
1619 case OPT_ffast_math:
1620 set_fast_math_flags (opts, value);
1621 break;
1623 case OPT_funsafe_math_optimizations:
1624 set_unsafe_math_optimizations_flags (opts, value);
1625 break;
1627 case OPT_ffixed_:
1628 /* Deferred. */
1629 break;
1631 case OPT_finline_limit_:
1632 set_param_value ("max-inline-insns-single", value / 2,
1633 opts->x_param_values, opts_set->x_param_values);
1634 set_param_value ("max-inline-insns-auto", value / 2,
1635 opts->x_param_values, opts_set->x_param_values);
1636 break;
1638 case OPT_finstrument_functions_exclude_function_list_:
1639 add_comma_separated_to_vector
1640 (&opts->x_flag_instrument_functions_exclude_functions, arg);
1641 break;
1643 case OPT_finstrument_functions_exclude_file_list_:
1644 add_comma_separated_to_vector
1645 (&opts->x_flag_instrument_functions_exclude_files, arg);
1646 break;
1648 case OPT_fmessage_length_:
1649 pp_set_line_maximum_length (dc->printer, value);
1650 diagnostic_set_caret_max_width (dc, value);
1651 break;
1653 case OPT_fopt_info:
1654 case OPT_fopt_info_:
1655 /* Deferred. */
1656 break;
1658 case OPT_fpack_struct_:
1659 if (value <= 0 || (value & (value - 1)) || value > 16)
1660 error_at (loc,
1661 "structure alignment must be a small power of two, not %d",
1662 value);
1663 else
1664 opts->x_initial_max_fld_align = value;
1665 break;
1667 case OPT_fplugin_:
1668 case OPT_fplugin_arg_:
1669 /* Deferred. */
1670 break;
1672 case OPT_fprofile_use_:
1673 opts->x_profile_data_prefix = xstrdup (arg);
1674 opts->x_flag_profile_use = true;
1675 value = true;
1676 /* No break here - do -fprofile-use processing. */
1677 case OPT_fprofile_use:
1678 if (!opts_set->x_flag_branch_probabilities)
1679 opts->x_flag_branch_probabilities = value;
1680 if (!opts_set->x_flag_profile_values)
1681 opts->x_flag_profile_values = value;
1682 if (!opts_set->x_flag_unroll_loops)
1683 opts->x_flag_unroll_loops = value;
1684 if (!opts_set->x_flag_peel_loops)
1685 opts->x_flag_peel_loops = value;
1686 if (!opts_set->x_flag_tracer)
1687 opts->x_flag_tracer = value;
1688 if (!opts_set->x_flag_value_profile_transformations)
1689 opts->x_flag_value_profile_transformations = value;
1690 if (!opts_set->x_flag_inline_functions)
1691 opts->x_flag_inline_functions = value;
1692 if (!opts_set->x_flag_ipa_cp)
1693 opts->x_flag_ipa_cp = value;
1694 if (!opts_set->x_flag_ipa_cp_clone
1695 && value && opts->x_flag_ipa_cp)
1696 opts->x_flag_ipa_cp_clone = value;
1697 if (!opts_set->x_flag_predictive_commoning)
1698 opts->x_flag_predictive_commoning = value;
1699 if (!opts_set->x_flag_unswitch_loops)
1700 opts->x_flag_unswitch_loops = value;
1701 if (!opts_set->x_flag_gcse_after_reload)
1702 opts->x_flag_gcse_after_reload = value;
1703 if (!opts_set->x_flag_tree_loop_vectorize
1704 && !opts_set->x_flag_tree_vectorize)
1705 opts->x_flag_tree_loop_vectorize = value;
1706 if (!opts_set->x_flag_tree_slp_vectorize
1707 && !opts_set->x_flag_tree_vectorize)
1708 opts->x_flag_tree_slp_vectorize = value;
1709 if (!opts_set->x_flag_vect_cost_model)
1710 opts->x_flag_vect_cost_model = VECT_COST_MODEL_DYNAMIC;
1711 if (!opts_set->x_flag_tree_loop_distribute_patterns)
1712 opts->x_flag_tree_loop_distribute_patterns = value;
1713 if (!opts_set->x_flag_profile_reorder_functions)
1714 opts->x_flag_profile_reorder_functions = value;
1715 /* Indirect call profiling should do all useful transformations
1716 speculative devirtualization does. */
1717 if (!opts_set->x_flag_devirtualize_speculatively
1718 && opts->x_flag_value_profile_transformations)
1719 opts->x_flag_devirtualize_speculatively = false;
1720 break;
1722 case OPT_fprofile_generate_:
1723 opts->x_profile_data_prefix = xstrdup (arg);
1724 value = true;
1725 /* No break here - do -fprofile-generate processing. */
1726 case OPT_fprofile_generate:
1727 if (!opts_set->x_profile_arc_flag)
1728 opts->x_profile_arc_flag = value;
1729 if (!opts_set->x_flag_profile_values)
1730 opts->x_flag_profile_values = value;
1731 if (!opts_set->x_flag_inline_functions)
1732 opts->x_flag_inline_functions = value;
1733 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1734 quadratic. Disable the pass until better memory representation
1735 is done. */
1736 if (!opts_set->x_flag_ipa_reference && opts->x_in_lto_p)
1737 opts->x_flag_ipa_reference = false;
1738 break;
1740 case OPT_ftree_vectorize:
1741 if (!opts_set->x_flag_tree_loop_vectorize)
1742 opts->x_flag_tree_loop_vectorize = value;
1743 if (!opts_set->x_flag_tree_slp_vectorize)
1744 opts->x_flag_tree_slp_vectorize = value;
1745 break;
1746 case OPT_fshow_column:
1747 dc->show_column = value;
1748 break;
1750 case OPT_frandom_seed:
1751 /* The real switch is -fno-random-seed. */
1752 if (value)
1753 return false;
1754 /* Deferred. */
1755 break;
1757 case OPT_frandom_seed_:
1758 /* Deferred. */
1759 break;
1761 case OPT_fsched_verbose_:
1762 #ifdef INSN_SCHEDULING
1763 /* Handled with Var in common.opt. */
1764 break;
1765 #else
1766 return false;
1767 #endif
1769 case OPT_fsched_stalled_insns_:
1770 opts->x_flag_sched_stalled_insns = value;
1771 if (opts->x_flag_sched_stalled_insns == 0)
1772 opts->x_flag_sched_stalled_insns = -1;
1773 break;
1775 case OPT_fsched_stalled_insns_dep_:
1776 opts->x_flag_sched_stalled_insns_dep = value;
1777 break;
1779 case OPT_fstack_check_:
1780 if (!strcmp (arg, "no"))
1781 opts->x_flag_stack_check = NO_STACK_CHECK;
1782 else if (!strcmp (arg, "generic"))
1783 /* This is the old stack checking method. */
1784 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1785 ? FULL_BUILTIN_STACK_CHECK
1786 : GENERIC_STACK_CHECK;
1787 else if (!strcmp (arg, "specific"))
1788 /* This is the new stack checking method. */
1789 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1790 ? FULL_BUILTIN_STACK_CHECK
1791 : STACK_CHECK_STATIC_BUILTIN
1792 ? STATIC_BUILTIN_STACK_CHECK
1793 : GENERIC_STACK_CHECK;
1794 else
1795 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg);
1796 break;
1798 case OPT_fstack_limit:
1799 /* The real switch is -fno-stack-limit. */
1800 if (value)
1801 return false;
1802 /* Deferred. */
1803 break;
1805 case OPT_fstack_limit_register_:
1806 case OPT_fstack_limit_symbol_:
1807 /* Deferred. */
1808 break;
1810 case OPT_fstack_usage:
1811 opts->x_flag_stack_usage = value;
1812 opts->x_flag_stack_usage_info = value != 0;
1813 break;
1815 case OPT_g:
1816 /* -g by itself should force -g2. */
1817 if (*arg == '\0')
1818 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, "2", opts, opts_set,
1819 loc);
1820 else
1821 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set,
1822 loc);
1823 break;
1825 case OPT_gcoff:
1826 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
1827 break;
1829 case OPT_gdwarf:
1830 if (arg && strlen (arg) != 0)
1832 error_at (loc, "%<-gdwarf%s%> is ambiguous; "
1833 "use %<-gdwarf-%s%> for DWARF version "
1834 "or %<-gdwarf -g%s%> for debug level", arg, arg, arg);
1835 break;
1837 else
1838 value = opts->x_dwarf_version;
1840 /* FALLTHRU */
1841 case OPT_gdwarf_:
1842 if (value < 2 || value > 4)
1843 error_at (loc, "dwarf version %d is not supported", value);
1844 else
1845 opts->x_dwarf_version = value;
1846 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc);
1847 break;
1849 case OPT_gsplit_dwarf:
1850 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, "", opts, opts_set,
1851 loc);
1852 break;
1854 case OPT_ggdb:
1855 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
1856 break;
1858 case OPT_gstabs:
1859 case OPT_gstabs_:
1860 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,
1861 loc);
1862 break;
1864 case OPT_gvms:
1865 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc);
1866 break;
1868 case OPT_gxcoff:
1869 case OPT_gxcoff_:
1870 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set,
1871 loc);
1872 break;
1874 case OPT_pedantic_errors:
1875 dc->pedantic_errors = 1;
1876 control_warning_option (OPT_Wpedantic, DK_ERROR, value,
1877 loc, lang_mask,
1878 handlers, opts, opts_set,
1879 dc);
1880 break;
1882 case OPT_flto:
1883 opts->x_flag_lto = value ? "" : NULL;
1884 break;
1886 case OPT_w:
1887 dc->dc_inhibit_warnings = true;
1888 break;
1890 case OPT_fmax_errors_:
1891 dc->max_errors = value;
1892 break;
1894 case OPT_fuse_ld_bfd:
1895 case OPT_fuse_ld_gold:
1896 case OPT_fuse_linker_plugin:
1897 /* No-op. Used by the driver and passed to us because it starts with f.*/
1898 break;
1900 case OPT_fwrapv:
1901 if (value)
1902 opts->x_flag_trapv = 0;
1903 break;
1905 case OPT_ftrapv:
1906 if (value)
1907 opts->x_flag_wrapv = 0;
1908 break;
1910 default:
1911 /* If the flag was handled in a standard way, assume the lack of
1912 processing here is intentional. */
1913 gcc_assert (option_flag_var (scode, opts));
1914 break;
1917 common_handle_option_auto (opts, opts_set, decoded, lang_mask, kind,
1918 loc, handlers, dc);
1919 return true;
1922 /* Handle --param NAME=VALUE. */
1923 static void
1924 handle_param (struct gcc_options *opts, struct gcc_options *opts_set,
1925 location_t loc, const char *carg)
1927 char *equal, *arg;
1928 int value;
1930 arg = xstrdup (carg);
1931 equal = strchr (arg, '=');
1932 if (!equal)
1933 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE",
1934 arg);
1935 else
1937 value = integral_argument (equal + 1);
1938 if (value == -1)
1939 error_at (loc, "invalid --param value %qs", equal + 1);
1940 else
1942 *equal = '\0';
1943 set_param_value (arg, value,
1944 opts->x_param_values, opts_set->x_param_values);
1948 free (arg);
1951 /* Used to set the level of strict aliasing warnings in OPTS,
1952 when no level is specified (i.e., when -Wstrict-aliasing, and not
1953 -Wstrict-aliasing=level was given).
1954 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1955 and 0 otherwise. After calling this function, wstrict_aliasing will be
1956 set to the default value of -Wstrict_aliasing=level, currently 3. */
1957 static void
1958 set_Wstrict_aliasing (struct gcc_options *opts, int onoff)
1960 gcc_assert (onoff == 0 || onoff == 1);
1961 if (onoff != 0)
1962 opts->x_warn_strict_aliasing = 3;
1963 else
1964 opts->x_warn_strict_aliasing = 0;
1967 /* The following routines are useful in setting all the flags that
1968 -ffast-math and -fno-fast-math imply. */
1969 static void
1970 set_fast_math_flags (struct gcc_options *opts, int set)
1972 if (!opts->frontend_set_flag_unsafe_math_optimizations)
1974 opts->x_flag_unsafe_math_optimizations = set;
1975 set_unsafe_math_optimizations_flags (opts, set);
1977 if (!opts->frontend_set_flag_finite_math_only)
1978 opts->x_flag_finite_math_only = set;
1979 if (!opts->frontend_set_flag_errno_math)
1980 opts->x_flag_errno_math = !set;
1981 if (set)
1983 if (!opts->frontend_set_flag_signaling_nans)
1984 opts->x_flag_signaling_nans = 0;
1985 if (!opts->frontend_set_flag_rounding_math)
1986 opts->x_flag_rounding_math = 0;
1987 if (!opts->frontend_set_flag_cx_limited_range)
1988 opts->x_flag_cx_limited_range = 1;
1992 /* When -funsafe-math-optimizations is set the following
1993 flags are set as well. */
1994 static void
1995 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
1997 if (!opts->frontend_set_flag_trapping_math)
1998 opts->x_flag_trapping_math = !set;
1999 if (!opts->frontend_set_flag_signed_zeros)
2000 opts->x_flag_signed_zeros = !set;
2001 if (!opts->frontend_set_flag_associative_math)
2002 opts->x_flag_associative_math = set;
2003 if (!opts->frontend_set_flag_reciprocal_math)
2004 opts->x_flag_reciprocal_math = set;
2007 /* Return true iff flags in OPTS are set as if -ffast-math. */
2008 bool
2009 fast_math_flags_set_p (const struct gcc_options *opts)
2011 return (!opts->x_flag_trapping_math
2012 && opts->x_flag_unsafe_math_optimizations
2013 && opts->x_flag_finite_math_only
2014 && !opts->x_flag_signed_zeros
2015 && !opts->x_flag_errno_math);
2018 /* Return true iff flags are set as if -ffast-math but using the flags stored
2019 in the struct cl_optimization structure. */
2020 bool
2021 fast_math_flags_struct_set_p (struct cl_optimization *opt)
2023 return (!opt->x_flag_trapping_math
2024 && opt->x_flag_unsafe_math_optimizations
2025 && opt->x_flag_finite_math_only
2026 && !opt->x_flag_signed_zeros
2027 && !opt->x_flag_errno_math);
2030 /* Handle a debug output -g switch for options OPTS
2031 (OPTS_SET->x_write_symbols storing whether a debug type was passed
2032 explicitly), location LOC. EXTENDED is true or false to support
2033 extended output (2 is special and means "-ggdb" was given). */
2034 static void
2035 set_debug_level (enum debug_info_type type, int extended, const char *arg,
2036 struct gcc_options *opts, struct gcc_options *opts_set,
2037 location_t loc)
2039 opts->x_use_gnu_debug_info_extensions = extended;
2041 if (type == NO_DEBUG)
2043 if (opts->x_write_symbols == NO_DEBUG)
2045 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE;
2047 if (extended == 2)
2049 #ifdef DWARF2_DEBUGGING_INFO
2050 opts->x_write_symbols = DWARF2_DEBUG;
2051 #elif defined DBX_DEBUGGING_INFO
2052 opts->x_write_symbols = DBX_DEBUG;
2053 #endif
2056 if (opts->x_write_symbols == NO_DEBUG)
2057 warning_at (loc, 0, "target system does not support debug output");
2060 else
2062 /* Does it conflict with an already selected type? */
2063 if (opts_set->x_write_symbols != NO_DEBUG
2064 && opts->x_write_symbols != NO_DEBUG
2065 && type != opts->x_write_symbols)
2066 error_at (loc, "debug format \"%s\" conflicts with prior selection",
2067 debug_type_names[type]);
2068 opts->x_write_symbols = type;
2069 opts_set->x_write_symbols = type;
2072 /* A debug flag without a level defaults to level 2. */
2073 if (*arg == '\0')
2075 if (!opts->x_debug_info_level)
2076 opts->x_debug_info_level = DINFO_LEVEL_NORMAL;
2078 else
2080 int argval = integral_argument (arg);
2081 if (argval == -1)
2082 error_at (loc, "unrecognised debug output level \"%s\"", arg);
2083 else if (argval > 3)
2084 error_at (loc, "debug output level %s is too high", arg);
2085 else
2086 opts->x_debug_info_level = (enum debug_info_levels) argval;
2090 /* Arrange to dump core on error for diagnostic context DC. (The
2091 regular error message is still printed first, except in the case of
2092 abort ().) */
2094 static void
2095 setup_core_dumping (diagnostic_context *dc)
2097 #ifdef SIGABRT
2098 signal (SIGABRT, SIG_DFL);
2099 #endif
2100 #if defined(HAVE_SETRLIMIT)
2102 struct rlimit rlim;
2103 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
2104 fatal_error ("getting core file size maximum limit: %m");
2105 rlim.rlim_cur = rlim.rlim_max;
2106 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
2107 fatal_error ("setting core file size limit to maximum: %m");
2109 #endif
2110 diagnostic_abort_on_error (dc);
2113 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
2114 diagnostic context DC. */
2116 static void
2117 decode_d_option (const char *arg, struct gcc_options *opts,
2118 location_t loc, diagnostic_context *dc)
2120 int c;
2122 while (*arg)
2123 switch (c = *arg++)
2125 case 'A':
2126 opts->x_flag_debug_asm = 1;
2127 break;
2128 case 'p':
2129 opts->x_flag_print_asm_name = 1;
2130 break;
2131 case 'P':
2132 opts->x_flag_dump_rtl_in_asm = 1;
2133 opts->x_flag_print_asm_name = 1;
2134 break;
2135 case 'x':
2136 opts->x_rtl_dump_and_exit = 1;
2137 break;
2138 case 'D': /* These are handled by the preprocessor. */
2139 case 'I':
2140 case 'M':
2141 case 'N':
2142 case 'U':
2143 break;
2144 case 'H':
2145 setup_core_dumping (dc);
2146 break;
2147 case 'a':
2148 opts->x_flag_dump_all_passed = true;
2149 break;
2151 default:
2152 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c);
2153 break;
2157 /* Enable (or disable if VALUE is 0) a warning option ARG (language
2158 mask LANG_MASK, option handlers HANDLERS) as an error for option
2159 structures OPTS and OPTS_SET, diagnostic context DC (possibly
2160 NULL), location LOC. This is used by -Werror=. */
2162 static void
2163 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
2164 const struct cl_option_handlers *handlers,
2165 struct gcc_options *opts,
2166 struct gcc_options *opts_set,
2167 location_t loc, diagnostic_context *dc)
2169 char *new_option;
2170 int option_index;
2172 new_option = XNEWVEC (char, strlen (arg) + 2);
2173 new_option[0] = 'W';
2174 strcpy (new_option + 1, arg);
2175 option_index = find_opt (new_option, lang_mask);
2176 if (option_index == OPT_SPECIAL_unknown)
2178 error_at (loc, "-Werror=%s: no option -%s", arg, new_option);
2180 else
2182 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2184 control_warning_option (option_index, (int) kind, value,
2185 loc, lang_mask,
2186 handlers, opts, opts_set, dc);
2188 free (new_option);
2191 /* Return malloced memory for the name of the option OPTION_INDEX
2192 which enabled a diagnostic (context CONTEXT), originally of type
2193 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2194 as -Werror. */
2196 char *
2197 option_name (diagnostic_context *context, int option_index,
2198 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
2200 if (option_index)
2202 /* A warning classified as an error. */
2203 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
2204 && diag_kind == DK_ERROR)
2205 return concat (cl_options[OPT_Werror_].opt_text,
2206 /* Skip over "-W". */
2207 cl_options[option_index].opt_text + 2,
2208 NULL);
2209 /* A warning with option. */
2210 else
2211 return xstrdup (cl_options[option_index].opt_text);
2213 /* A warning without option classified as an error. */
2214 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2215 || diag_kind == DK_WARNING)
2217 if (context->warning_as_error_requested)
2218 return xstrdup (cl_options[OPT_Werror].opt_text);
2219 else
2220 return xstrdup (_("enabled by default"));
2222 else
2223 return NULL;