1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
26 #include "tm.h" /* Needed by rtl.h and used for STACK_CHECK_BUILTIN,
27 STACK_CHECK_STATIC_BUILTIN, DEFAULT_GDB_EXTENSIONS,
28 DWARF2_DEBUGGING_INFO and DBX_DEBUGGING_INFO. */
29 #include "rtl.h" /* Needed by insn-attr.h. */
34 #include "diagnostic.h"
35 #include "opts-diagnostic.h"
36 #include "insn-attr.h" /* For INSN_SCHEDULING and DELAY_SLOTS. */
38 #include "common/common-target.h"
40 /* Parse the -femit-struct-debug-detailed option value
41 and set the flag variables. */
43 #define MATCH( prefix, string ) \
44 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
45 ? ((string += sizeof prefix - 1), 1) : 0)
48 set_struct_debug_option (struct gcc_options *opts, location_t loc,
51 /* various labels for comparison */
52 static const char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
53 static const char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
54 static const char none_lbl[] = "none", any_lbl[] = "any";
55 static const char base_lbl[] = "base", sys_lbl[] = "sys";
57 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
58 /* Default is to apply to as much as possible. */
59 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
63 if (MATCH (dfn_lbl, spec))
64 usage = DINFO_USAGE_DFN;
65 else if (MATCH (dir_lbl, spec))
66 usage = DINFO_USAGE_DIR_USE;
67 else if (MATCH (ind_lbl, spec))
68 usage = DINFO_USAGE_IND_USE;
70 /* Generics or not? */
71 if (MATCH (ord_lbl, spec))
73 else if (MATCH (gen_lbl, spec))
76 /* What allowable environment? */
77 if (MATCH (none_lbl, spec))
78 files = DINFO_STRUCT_FILE_NONE;
79 else if (MATCH (any_lbl, spec))
80 files = DINFO_STRUCT_FILE_ANY;
81 else if (MATCH (sys_lbl, spec))
82 files = DINFO_STRUCT_FILE_SYS;
83 else if (MATCH (base_lbl, spec))
84 files = DINFO_STRUCT_FILE_BASE;
87 "argument %qs to %<-femit-struct-debug-detailed%> "
91 /* Effect the specification. */
92 if (usage == DINFO_USAGE_NUM_ENUMS)
96 opts->x_debug_struct_ordinary[DINFO_USAGE_DFN] = files;
97 opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
98 opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
102 opts->x_debug_struct_generic[DINFO_USAGE_DFN] = files;
103 opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
104 opts->x_debug_struct_generic[DINFO_USAGE_IND_USE] = files;
110 opts->x_debug_struct_ordinary[usage] = files;
112 opts->x_debug_struct_generic[usage] = files;
116 set_struct_debug_option (opts, loc, spec+1);
119 /* No more -femit-struct-debug-detailed specifications.
123 "argument %qs to %<-femit-struct-debug-detailed%> unknown",
125 if (opts->x_debug_struct_ordinary[DINFO_USAGE_DIR_USE]
126 < opts->x_debug_struct_ordinary[DINFO_USAGE_IND_USE]
127 || opts->x_debug_struct_generic[DINFO_USAGE_DIR_USE]
128 < opts->x_debug_struct_generic[DINFO_USAGE_IND_USE])
130 "%<-femit-struct-debug-detailed=dir:...%> must allow "
131 "at least as much as "
132 "%<-femit-struct-debug-detailed=ind:...%>");
136 /* Handle -ftree-vectorizer-verbose=VAL for options OPTS. */
139 vect_set_verbosity_level (struct gcc_options *opts, int val)
141 if (val < MAX_VERBOSITY_LEVEL)
142 opts->x_user_vect_verbosity_level = (enum vect_verbosity_levels) val;
144 opts->x_user_vect_verbosity_level
145 = (enum vect_verbosity_levels) (MAX_VERBOSITY_LEVEL - 1);
149 /* Strip off a legitimate source ending from the input string NAME of
150 length LEN. Rather than having to know the names used by all of
151 our front ends, we strip off an ending of a period followed by
152 up to five characters. (Java uses ".class".) */
155 strip_off_ending (char *name, int len)
158 for (i = 2; i < 6 && len > i; i++)
160 if (name[len - i] == '.')
162 name[len - i] = '\0';
168 /* Find the base name of a path, stripping off both directories and
169 a single final extension. */
171 base_of_path (const char *path, const char **base_out)
173 const char *base = path;
175 const char *p = path;
179 if (IS_DIR_SEPARATOR(c))
194 /* What to print when a switch has no documentation. */
195 static const char undocumented_msg[] = N_("This switch lacks documentation");
197 typedef char *char_p; /* For DEF_VEC_P. */
199 DEF_VEC_ALLOC_P(char_p,heap);
201 static void handle_param (struct gcc_options *opts,
202 struct gcc_options *opts_set, location_t loc,
204 static void set_debug_level (enum debug_info_type type, int extended,
205 const char *arg, struct gcc_options *opts,
206 struct gcc_options *opts_set,
208 static void set_fast_math_flags (struct gcc_options *opts, int set);
209 static void decode_d_option (const char *arg, struct gcc_options *opts,
210 location_t loc, diagnostic_context *dc);
211 static void set_unsafe_math_optimizations_flags (struct gcc_options *opts,
213 static void enable_warning_as_error (const char *arg, int value,
214 unsigned int lang_mask,
215 const struct cl_option_handlers *handlers,
216 struct gcc_options *opts,
217 struct gcc_options *opts_set,
219 diagnostic_context *dc);
221 /* Handle a back-end option; arguments and return value as for
225 target_handle_option (struct gcc_options *opts,
226 struct gcc_options *opts_set,
227 const struct cl_decoded_option *decoded,
228 unsigned int lang_mask ATTRIBUTE_UNUSED, int kind,
230 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED,
231 diagnostic_context *dc)
233 gcc_assert (dc == global_dc);
234 gcc_assert (kind == DK_UNSPECIFIED);
235 return targetm_common.handle_option (opts, opts_set, decoded, loc);
238 /* Add comma-separated strings to a char_p vector. */
241 add_comma_separated_to_vector (void **pvec, const char *arg)
247 VEC(char_p,heap) *vec = (VEC(char_p,heap) *) *pvec;
249 /* We never free this string. */
262 VEC_safe_push (char_p, heap, vec, token_start);
265 if (*r == '\\' && r[1] == ',')
273 if (*token_start != '\0')
274 VEC_safe_push (char_p, heap, vec, token_start);
279 /* Initialize OPTS and OPTS_SET before using them in parsing options. */
282 init_options_struct (struct gcc_options *opts, struct gcc_options *opts_set)
284 size_t num_params = get_num_compiler_params ();
286 *opts = global_options_init;
287 memset (opts_set, 0, sizeof (*opts_set));
289 opts->x_param_values = XNEWVEC (int, num_params);
290 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), apply the option DEFAULT_OPT to OPTS and
312 OPTS_SET, diagnostic context DC, location LOC, with language mask
313 LANG_MASK and option handlers HANDLERS. */
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,
320 unsigned int lang_mask,
321 const struct cl_option_handlers *handlers,
323 diagnostic_context *dc)
325 const struct cl_option *option = &cl_options[default_opt->opt_index];
329 gcc_assert (level == 2);
331 gcc_assert (level == 3);
333 switch (default_opt->levels)
339 case OPT_LEVELS_0_ONLY:
340 enabled = (level == 0);
343 case OPT_LEVELS_1_PLUS:
344 enabled = (level >= 1);
347 case OPT_LEVELS_1_PLUS_SPEED_ONLY:
348 enabled = (level >= 1 && !size);
351 case OPT_LEVELS_2_PLUS:
352 enabled = (level >= 2);
355 case OPT_LEVELS_2_PLUS_SPEED_ONLY:
356 enabled = (level >= 2 && !size);
359 case OPT_LEVELS_3_PLUS:
360 enabled = (level >= 3);
363 case OPT_LEVELS_3_PLUS_AND_SIZE:
364 enabled = (level >= 3 || size);
367 case OPT_LEVELS_SIZE:
371 case OPT_LEVELS_FAST:
375 case OPT_LEVELS_NONE:
381 handle_generated_option (opts, opts_set, default_opt->opt_index,
382 default_opt->arg, default_opt->value,
383 lang_mask, DK_UNSPECIFIED, loc,
385 else if (default_opt->arg == NULL
386 && !option->cl_reject_negative)
387 handle_generated_option (opts, opts_set, default_opt->opt_index,
388 default_opt->arg, !default_opt->value,
389 lang_mask, DK_UNSPECIFIED, loc,
393 /* As indicated by the optimization level LEVEL (-Os if SIZE is set,
394 -Ofast if FAST is set), apply the options in array DEFAULT_OPTS to
395 OPTS and OPTS_SET, diagnostic context DC, location LOC, with
396 language mask LANG_MASK and option handlers HANDLERS. */
399 maybe_default_options (struct gcc_options *opts,
400 struct gcc_options *opts_set,
401 const struct default_options *default_opts,
402 int level, bool size, bool fast,
403 unsigned int lang_mask,
404 const struct cl_option_handlers *handlers,
406 diagnostic_context *dc)
410 for (i = 0; default_opts[i].levels != OPT_LEVELS_NONE; i++)
411 maybe_default_option (opts, opts_set, &default_opts[i],
412 level, size, fast, lang_mask, handlers, loc, dc);
415 /* Table of options enabled by default at different levels. */
417 static const struct default_options default_options_table[] =
419 /* -O1 optimizations. */
420 { OPT_LEVELS_1_PLUS, OPT_fdefer_pop, NULL, 1 },
422 { OPT_LEVELS_1_PLUS, OPT_fdelayed_branch, NULL, 1 },
424 { OPT_LEVELS_1_PLUS, OPT_fguess_branch_probability, NULL, 1 },
425 { OPT_LEVELS_1_PLUS, OPT_fcprop_registers, NULL, 1 },
426 { OPT_LEVELS_1_PLUS, OPT_fforward_propagate, NULL, 1 },
427 { OPT_LEVELS_1_PLUS, OPT_fif_conversion, NULL, 1 },
428 { OPT_LEVELS_1_PLUS, OPT_fif_conversion2, NULL, 1 },
429 { OPT_LEVELS_1_PLUS, OPT_fipa_pure_const, NULL, 1 },
430 { OPT_LEVELS_1_PLUS, OPT_fipa_reference, NULL, 1 },
431 { OPT_LEVELS_1_PLUS, OPT_fipa_profile, NULL, 1 },
432 { OPT_LEVELS_1_PLUS, OPT_fmerge_constants, NULL, 1 },
433 { OPT_LEVELS_1_PLUS, OPT_fsplit_wide_types, NULL, 1 },
434 { OPT_LEVELS_1_PLUS, OPT_ftree_ccp, NULL, 1 },
435 { OPT_LEVELS_1_PLUS, OPT_ftree_bit_ccp, NULL, 1 },
436 { OPT_LEVELS_1_PLUS, OPT_ftree_dce, NULL, 1 },
437 { OPT_LEVELS_1_PLUS, OPT_ftree_dominator_opts, NULL, 1 },
438 { OPT_LEVELS_1_PLUS, OPT_ftree_dse, NULL, 1 },
439 { OPT_LEVELS_1_PLUS, OPT_ftree_ter, NULL, 1 },
440 { OPT_LEVELS_1_PLUS, OPT_ftree_sra, NULL, 1 },
441 { OPT_LEVELS_1_PLUS, OPT_ftree_copyrename, NULL, 1 },
442 { OPT_LEVELS_1_PLUS, OPT_ftree_fre, NULL, 1 },
443 { OPT_LEVELS_1_PLUS, OPT_ftree_copy_prop, NULL, 1 },
444 { OPT_LEVELS_1_PLUS, OPT_ftree_sink, NULL, 1 },
445 { OPT_LEVELS_1_PLUS, OPT_ftree_ch, NULL, 1 },
446 { OPT_LEVELS_1_PLUS, OPT_fcombine_stack_adjustments, NULL, 1 },
447 { OPT_LEVELS_1_PLUS, OPT_fcompare_elim, NULL, 1 },
449 /* -O2 optimizations. */
450 { OPT_LEVELS_2_PLUS, OPT_finline_small_functions, NULL, 1 },
451 { OPT_LEVELS_2_PLUS, OPT_findirect_inlining, NULL, 1 },
452 { OPT_LEVELS_2_PLUS, OPT_fpartial_inlining, NULL, 1 },
453 { OPT_LEVELS_2_PLUS, OPT_fthread_jumps, NULL, 1 },
454 { OPT_LEVELS_2_PLUS, OPT_fcrossjumping, NULL, 1 },
455 { OPT_LEVELS_2_PLUS, OPT_foptimize_sibling_calls, NULL, 1 },
456 { OPT_LEVELS_2_PLUS, OPT_fcse_follow_jumps, NULL, 1 },
457 { OPT_LEVELS_2_PLUS, OPT_fgcse, NULL, 1 },
458 { OPT_LEVELS_2_PLUS, OPT_fexpensive_optimizations, NULL, 1 },
459 { OPT_LEVELS_2_PLUS, OPT_frerun_cse_after_loop, NULL, 1 },
460 { OPT_LEVELS_2_PLUS, OPT_fcaller_saves, NULL, 1 },
461 { OPT_LEVELS_2_PLUS, OPT_fpeephole2, NULL, 1 },
462 #ifdef INSN_SCHEDULING
463 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
464 { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_fschedule_insns, NULL, 1 },
465 { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
467 { OPT_LEVELS_2_PLUS, OPT_fregmove, NULL, 1 },
468 { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
469 { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
470 { OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
471 { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
472 { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
473 { OPT_LEVELS_2_PLUS, OPT_ftree_builtin_call_dce, NULL, 1 },
474 { OPT_LEVELS_2_PLUS, OPT_ftree_pre, NULL, 1 },
475 { OPT_LEVELS_2_PLUS, OPT_ftree_switch_conversion, NULL, 1 },
476 { OPT_LEVELS_2_PLUS, OPT_fipa_cp, NULL, 1 },
477 { OPT_LEVELS_2_PLUS, OPT_fdevirtualize, NULL, 1 },
478 { OPT_LEVELS_2_PLUS, OPT_fipa_sra, NULL, 1 },
479 { OPT_LEVELS_2_PLUS, OPT_falign_loops, NULL, 1 },
480 { OPT_LEVELS_2_PLUS, OPT_falign_jumps, NULL, 1 },
481 { OPT_LEVELS_2_PLUS, OPT_falign_labels, NULL, 1 },
482 { OPT_LEVELS_2_PLUS, OPT_falign_functions, NULL, 1 },
484 /* -O3 optimizations. */
485 { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
486 { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
487 /* Inlining of functions reducing size is a good idea with -Os
488 regardless of them being declared inline. */
489 { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
490 { OPT_LEVELS_1_PLUS, OPT_finline_functions_called_once, NULL, 1 },
491 { OPT_LEVELS_3_PLUS, OPT_funswitch_loops, NULL, 1 },
492 { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },
493 { OPT_LEVELS_3_PLUS, OPT_ftree_vectorize, NULL, 1 },
494 { OPT_LEVELS_3_PLUS, OPT_fipa_cp_clone, NULL, 1 },
496 /* -Ofast adds optimizations to -O3. */
497 { OPT_LEVELS_FAST, OPT_ffast_math, NULL, 1 },
499 { OPT_LEVELS_NONE, 0, NULL, 0 }
502 /* Default the options in OPTS and OPTS_SET based on the optimization
503 settings in DECODED_OPTIONS and DECODED_OPTIONS_COUNT. */
505 default_options_optimization (struct gcc_options *opts,
506 struct gcc_options *opts_set,
507 struct cl_decoded_option *decoded_options,
508 unsigned int decoded_options_count,
510 unsigned int lang_mask,
511 const struct cl_option_handlers *handlers,
512 diagnostic_context *dc)
517 /* Scan to see what optimization level has been specified. That will
518 determine the default value of many flags. */
519 for (i = 1; i < decoded_options_count; i++)
521 struct cl_decoded_option *opt = &decoded_options[i];
522 switch (opt->opt_index)
525 if (*opt->arg == '\0')
527 opts->x_optimize = 1;
528 opts->x_optimize_size = 0;
529 opts->x_optimize_fast = 0;
533 const int optimize_val = integral_argument (opt->arg);
534 if (optimize_val == -1)
536 "argument to %qs should be a non-negative integer",
540 opts->x_optimize = optimize_val;
541 if ((unsigned int) opts->x_optimize > 255)
542 opts->x_optimize = 255;
543 opts->x_optimize_size = 0;
544 opts->x_optimize_fast = 0;
550 opts->x_optimize_size = 1;
552 /* Optimizing for size forces optimize to be 2. */
553 opts->x_optimize = 2;
554 opts->x_optimize_fast = 0;
558 /* -Ofast only adds flags to -O3. */
559 opts->x_optimize_size = 0;
560 opts->x_optimize = 3;
561 opts->x_optimize_fast = 1;
565 /* Ignore other options in this prescan. */
570 maybe_default_options (opts, opts_set, default_options_table,
571 opts->x_optimize, opts->x_optimize_size,
572 opts->x_optimize_fast, lang_mask, handlers, loc, dc);
574 /* -O2 param settings. */
575 opt2 = (opts->x_optimize >= 2);
577 /* Track fields in field-sensitive alias analysis. */
578 maybe_set_param_value
579 (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE,
580 opt2 ? 100 : default_param_value (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE),
581 opts->x_param_values, opts_set->x_param_values);
583 /* For -O1 only do loop invariant motion for very small loops. */
584 maybe_set_param_value
585 (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
586 opt2 ? default_param_value (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) : 1000,
587 opts->x_param_values, opts_set->x_param_values);
589 if (opts->x_optimize_size)
590 /* We want to crossjump as much as possible. */
591 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS, 1,
592 opts->x_param_values, opts_set->x_param_values);
594 maybe_set_param_value (PARAM_MIN_CROSSJUMP_INSNS,
595 default_param_value (PARAM_MIN_CROSSJUMP_INSNS),
596 opts->x_param_values, opts_set->x_param_values);
598 /* Allow default optimizations to be specified on a per-machine basis. */
599 maybe_default_options (opts, opts_set,
600 targetm_common.option_optimization_table,
601 opts->x_optimize, opts->x_optimize_size,
602 opts->x_optimize_fast, lang_mask, handlers, loc, dc);
605 /* After all options at LOC have been read into OPTS and OPTS_SET,
606 finalize settings of those options and diagnose incompatible
609 finish_options (struct gcc_options *opts, struct gcc_options *opts_set,
612 enum unwind_info_type ui_except;
614 if (opts->x_dump_base_name && ! IS_ABSOLUTE_PATH (opts->x_dump_base_name))
616 /* First try to make OPTS->X_DUMP_BASE_NAME relative to the
617 OPTS->X_DUMP_DIR_NAME directory. Then try to make
618 OPTS->X_DUMP_BASE_NAME relative to the OPTS->X_AUX_BASE_NAME
619 directory, typically the directory to contain the object
621 if (opts->x_dump_dir_name)
622 opts->x_dump_base_name = concat (opts->x_dump_dir_name,
623 opts->x_dump_base_name, NULL);
624 else if (opts->x_aux_base_name
625 && strcmp (opts->x_aux_base_name, HOST_BIT_BUCKET) != 0)
627 const char *aux_base;
629 base_of_path (opts->x_aux_base_name, &aux_base);
630 if (opts->x_aux_base_name != aux_base)
632 int dir_len = aux_base - opts->x_aux_base_name;
633 char *new_dump_base_name =
634 XNEWVEC (char, strlen (opts->x_dump_base_name) + dir_len + 1);
636 /* Copy directory component from OPTS->X_AUX_BASE_NAME. */
637 memcpy (new_dump_base_name, opts->x_aux_base_name, dir_len);
638 /* Append existing OPTS->X_DUMP_BASE_NAME. */
639 strcpy (new_dump_base_name + dir_len, opts->x_dump_base_name);
640 opts->x_dump_base_name = new_dump_base_name;
645 /* Handle related options for unit-at-a-time, toplevel-reorder, and
647 if (!opts->x_flag_unit_at_a_time)
649 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
650 error_at (loc, "section anchors must be disabled when unit-at-a-time "
652 opts->x_flag_section_anchors = 0;
653 if (opts->x_flag_toplevel_reorder == 1)
654 error_at (loc, "toplevel reorder must be disabled when unit-at-a-time "
656 opts->x_flag_toplevel_reorder = 0;
659 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
660 if (opts->x_warn_missing_noreturn)
661 opts->x_warn_suggest_attribute_noreturn = true;
663 /* Unless the user has asked for section anchors, we disable toplevel
664 reordering at -O0 to disable transformations that might be surprising
665 to end users and to get -fno-toplevel-reorder tested. */
666 if (!opts->x_optimize
667 && opts->x_flag_toplevel_reorder == 2
668 && !(opts->x_flag_section_anchors && opts_set->x_flag_section_anchors))
670 opts->x_flag_toplevel_reorder = 0;
671 opts->x_flag_section_anchors = 0;
673 if (!opts->x_flag_toplevel_reorder)
675 if (opts->x_flag_section_anchors && opts_set->x_flag_section_anchors)
676 error_at (loc, "section anchors must be disabled when toplevel reorder"
678 opts->x_flag_section_anchors = 0;
681 if (!opts->x_flag_opts_finished)
683 if (opts->x_flag_pie)
684 opts->x_flag_pic = opts->x_flag_pie;
685 if (opts->x_flag_pic && !opts->x_flag_pie)
686 opts->x_flag_shlib = 1;
687 opts->x_flag_opts_finished = true;
690 if (opts->x_optimize == 0)
692 /* Inlining does not work if not optimizing,
693 so force it not to be done. */
694 opts->x_warn_inline = 0;
695 opts->x_flag_no_inline = 1;
698 /* The optimization to partition hot and cold basic blocks into separate
699 sections of the .o and executable files does not work (currently)
700 with exception handling. This is because there is no support for
701 generating unwind info. If opts->x_flag_exceptions is turned on
702 we need to turn off the partitioning optimization. */
704 ui_except = targetm_common.except_unwind_info (opts);
706 if (opts->x_flag_exceptions
707 && opts->x_flag_reorder_blocks_and_partition
708 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
711 "-freorder-blocks-and-partition does not work "
712 "with exceptions on this architecture");
713 opts->x_flag_reorder_blocks_and_partition = 0;
714 opts->x_flag_reorder_blocks = 1;
717 /* If user requested unwind info, then turn off the partitioning
720 if (opts->x_flag_unwind_tables
721 && !targetm_common.unwind_tables_default
722 && opts->x_flag_reorder_blocks_and_partition
723 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))
726 "-freorder-blocks-and-partition does not support "
727 "unwind info on this architecture");
728 opts->x_flag_reorder_blocks_and_partition = 0;
729 opts->x_flag_reorder_blocks = 1;
732 /* If the target requested unwind info, then turn off the partitioning
733 optimization with a different message. Likewise, if the target does not
734 support named sections. */
736 if (opts->x_flag_reorder_blocks_and_partition
737 && (!targetm_common.have_named_sections
738 || (opts->x_flag_unwind_tables
739 && targetm_common.unwind_tables_default
740 && (ui_except == UI_SJLJ || ui_except == UI_TARGET))))
743 "-freorder-blocks-and-partition does not work "
744 "on this architecture");
745 opts->x_flag_reorder_blocks_and_partition = 0;
746 opts->x_flag_reorder_blocks = 1;
749 if (opts->x_flag_reorder_blocks_and_partition
750 && !opts_set->x_flag_reorder_functions)
751 opts->x_flag_reorder_functions = 1;
753 /* Pipelining of outer loops is only possible when general pipelining
754 capabilities are requested. */
755 if (!opts->x_flag_sel_sched_pipelining)
756 opts->x_flag_sel_sched_pipelining_outer_loops = 0;
758 if (opts->x_flag_conserve_stack)
760 maybe_set_param_value (PARAM_LARGE_STACK_FRAME, 100,
761 opts->x_param_values, opts_set->x_param_values);
762 maybe_set_param_value (PARAM_STACK_FRAME_GROWTH, 40,
763 opts->x_param_values, opts_set->x_param_values);
765 if (opts->x_flag_wpa || opts->x_flag_ltrans)
767 /* These passes are not WHOPR compatible yet. */
768 opts->x_flag_ipa_pta = 0;
771 if (opts->x_flag_lto)
774 opts->x_flag_generate_lto = 1;
776 /* When generating IL, do not operate in whole-program mode.
777 Otherwise, symbols will be privatized too early, causing link
779 opts->x_flag_whole_program = 0;
781 error_at (loc, "LTO support has not been enabled in this configuration");
784 if ((opts->x_flag_lto_partition_balanced != 0) + (opts->x_flag_lto_partition_1to1 != 0)
785 + (opts->x_flag_lto_partition_none != 0) >= 1)
787 if ((opts->x_flag_lto_partition_balanced != 0)
788 + (opts->x_flag_lto_partition_1to1 != 0)
789 + (opts->x_flag_lto_partition_none != 0) > 1)
790 error_at (loc, "only one -flto-partition value can be specified");
793 /* We initialize opts->x_flag_split_stack to -1 so that targets can set a
794 default value if they choose based on other options. */
795 if (opts->x_flag_split_stack == -1)
796 opts->x_flag_split_stack = 0;
797 else if (opts->x_flag_split_stack)
799 if (!targetm_common.supports_split_stack (true, opts))
801 error_at (loc, "%<-fsplit-stack%> is not supported by "
802 "this compiler configuration");
803 opts->x_flag_split_stack = 0;
807 /* Set PARAM_MAX_STORES_TO_SINK to 0 if either vectorization or if-conversion
809 if (!opts->x_flag_tree_vectorize || !opts->x_flag_tree_loop_if_convert)
810 maybe_set_param_value (PARAM_MAX_STORES_TO_SINK, 0,
811 opts->x_param_values, opts_set->x_param_values);
813 /* This replaces set_Wunused. */
814 if (opts->x_warn_unused_function == -1)
815 opts->x_warn_unused_function = opts->x_warn_unused;
816 if (opts->x_warn_unused_label == -1)
817 opts->x_warn_unused_label = opts->x_warn_unused;
818 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
819 if (opts->x_warn_unused_parameter == -1)
820 opts->x_warn_unused_parameter = (opts->x_warn_unused
821 && opts->x_extra_warnings);
822 if (opts->x_warn_unused_variable == -1)
823 opts->x_warn_unused_variable = opts->x_warn_unused;
824 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
826 if (opts->x_warn_unused_but_set_parameter == -1)
827 opts->x_warn_unused_but_set_parameter = (opts->x_warn_unused
828 && opts->x_extra_warnings);
829 if (opts->x_warn_unused_but_set_variable == -1)
830 opts->x_warn_unused_but_set_variable = opts->x_warn_unused;
831 if (opts->x_warn_unused_value == -1)
832 opts->x_warn_unused_value = opts->x_warn_unused;
834 /* This replaces set_Wextra. */
835 if (opts->x_warn_uninitialized == -1)
836 opts->x_warn_uninitialized = opts->x_extra_warnings;
839 #define LEFT_COLUMN 27
841 /* Output ITEM, of length ITEM_WIDTH, in the left column,
842 followed by word-wrapped HELP in a second column. */
844 wrap_help (const char *help,
846 unsigned int item_width,
847 unsigned int columns)
849 unsigned int col_width = LEFT_COLUMN;
850 unsigned int remaining, room, len;
852 remaining = strlen (help);
856 room = columns - 3 - MAX (col_width, item_width);
865 for (i = 0; help[i]; i++)
867 if (i >= room && len != remaining)
871 else if ((help[i] == '-' || help[i] == '/')
872 && help[i + 1] != ' '
873 && i > 0 && ISALPHA (help[i - 1]))
878 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
880 while (help[len] == ' ')
888 /* Print help for a specific front-end, etc. */
890 print_filtered_help (unsigned int include_flags,
891 unsigned int exclude_flags,
892 unsigned int any_flags,
893 unsigned int columns,
894 struct gcc_options *opts,
895 unsigned int lang_mask)
900 bool displayed = false;
902 if (include_flags == CL_PARAMS)
904 for (i = 0; i < LAST_PARAM; i++)
906 const char *param = compiler_params[i].option;
908 help = compiler_params[i].help;
909 if (help == NULL || *help == '\0')
911 if (exclude_flags & CL_UNDOCUMENTED)
913 help = undocumented_msg;
916 /* Get the translation. */
919 wrap_help (help, param, strlen (param), columns);
925 if (!opts->x_help_printed)
926 opts->x_help_printed = XCNEWVAR (char, cl_options_count);
928 if (!opts->x_help_enum_printed)
929 opts->x_help_enum_printed = XCNEWVAR (char, cl_enums_count);
931 for (i = 0; i < cl_options_count; i++)
934 const struct cl_option *option = cl_options + i;
939 if (include_flags == 0
940 || ((option->flags & include_flags) != include_flags))
942 if ((option->flags & any_flags) == 0)
946 /* Skip unwanted switches. */
947 if ((option->flags & exclude_flags) != 0)
950 /* The driver currently prints its own help text. */
951 if ((option->flags & CL_DRIVER) != 0
952 && (option->flags & (((1U << cl_lang_count) - 1)
953 | CL_COMMON | CL_TARGET)) == 0)
957 /* Skip switches that have already been printed. */
958 if (opts->x_help_printed[i])
961 opts->x_help_printed[i] = true;
966 if (exclude_flags & CL_UNDOCUMENTED)
968 help = undocumented_msg;
971 /* Get the translation. */
974 /* Find the gap between the name of the
975 option and its descriptive text. */
976 tab = strchr (help, '\t');
985 opt = option->opt_text;
989 /* With the -Q option enabled we change the descriptive text associated
990 with an option to be an indication of its current setting. */
993 void *flag_var = option_flag_var (i, opts);
995 if (len < (LEFT_COLUMN + 2))
996 strcpy (new_help, "\t\t");
998 strcpy (new_help, "\t");
1000 if (flag_var != NULL
1001 && option->var_type != CLVC_DEFER)
1003 if (option->flags & CL_JOINED)
1005 if (option->var_type == CLVC_STRING)
1007 if (* (const char **) flag_var != NULL)
1008 snprintf (new_help + strlen (new_help),
1009 sizeof (new_help) - strlen (new_help),
1010 * (const char **) flag_var);
1012 else if (option->var_type == CLVC_ENUM)
1014 const struct cl_enum *e = &cl_enums[option->var_enum];
1016 const char *arg = NULL;
1018 value = e->get (flag_var);
1019 enum_value_to_arg (e->values, &arg, value, lang_mask);
1021 arg = _("[default]");
1022 snprintf (new_help + strlen (new_help),
1023 sizeof (new_help) - strlen (new_help),
1027 sprintf (new_help + strlen (new_help),
1028 "%#x", * (int *) flag_var);
1031 strcat (new_help, option_enabled (i, opts)
1032 ? _("[enabled]") : _("[disabled]"));
1038 wrap_help (help, opt, len, columns);
1041 if (option->var_type == CLVC_ENUM
1042 && opts->x_help_enum_printed[option->var_enum] != 2)
1043 opts->x_help_enum_printed[option->var_enum] = 1;
1048 unsigned int langs = include_flags & CL_LANG_ALL;
1051 printf (_(" No options with the desired characteristics were found\n"));
1056 /* PR 31349: Tell the user how to see all of the
1057 options supported by a specific front end. */
1058 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1059 if ((1U << i) & langs)
1060 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1061 lang_names[i], lang_names[i]);
1065 else if (! displayed)
1066 printf (_(" All options with the desired characteristics have already been displayed\n"));
1070 /* Print details of enumerated option arguments, if those
1071 enumerations have help text headings provided. If no help text
1072 is provided, presume that the possible values are listed in the
1073 help text for the relevant options. */
1074 for (i = 0; i < cl_enums_count; i++)
1076 unsigned int j, pos;
1078 if (opts->x_help_enum_printed[i] != 1)
1080 if (cl_enums[i].help == NULL)
1082 printf (" %s\n ", _(cl_enums[i].help));
1084 for (j = 0; cl_enums[i].values[j].arg != NULL; j++)
1086 unsigned int len = strlen (cl_enums[i].values[j].arg);
1088 if (pos > 4 && pos + 1 + len <= columns)
1090 printf (" %s", cl_enums[i].values[j].arg);
1100 printf ("%s", cl_enums[i].values[j].arg);
1105 opts->x_help_enum_printed[i] = 2;
1109 /* Display help for a specified type of option.
1110 The options must have ALL of the INCLUDE_FLAGS set
1111 ANY of the flags in the ANY_FLAGS set
1112 and NONE of the EXCLUDE_FLAGS set. The current option state is in
1113 OPTS; LANG_MASK is used for interpreting enumerated option state. */
1115 print_specific_help (unsigned int include_flags,
1116 unsigned int exclude_flags,
1117 unsigned int any_flags,
1118 struct gcc_options *opts,
1119 unsigned int lang_mask)
1121 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1122 const char * description = NULL;
1123 const char * descrip_extra = "";
1127 /* Sanity check: Make sure that we do not have more
1128 languages than we have bits available to enumerate them. */
1129 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1131 /* If we have not done so already, obtain
1132 the desired maximum width of the output. */
1133 if (opts->x_help_columns == 0)
1137 p = getenv ("COLUMNS");
1140 int value = atoi (p);
1143 opts->x_help_columns = value;
1146 if (opts->x_help_columns == 0)
1147 /* Use a reasonable default. */
1148 opts->x_help_columns = 80;
1151 /* Decide upon the title for the options that we are going to display. */
1152 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1154 switch (flag & include_flags)
1161 description = _("The following options are target specific");
1164 description = _("The following options control compiler warning messages");
1166 case CL_OPTIMIZATION:
1167 description = _("The following options control optimizations");
1170 description = _("The following options are language-independent");
1173 description = _("The --param option recognizes the following as parameters");
1176 if (i >= cl_lang_count)
1178 if (exclude_flags & all_langs_mask)
1179 description = _("The following options are specific to just the language ");
1181 description = _("The following options are supported by the language ");
1182 descrip_extra = lang_names [i];
1187 if (description == NULL)
1191 if (include_flags & CL_UNDOCUMENTED)
1192 description = _("The following options are not documented");
1193 else if (include_flags & CL_SEPARATE)
1194 description = _("The following options take separate arguments");
1195 else if (include_flags & CL_JOINED)
1196 description = _("The following options take joined arguments");
1199 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1206 if (any_flags & all_langs_mask)
1207 description = _("The following options are language-related");
1209 description = _("The following options are language-independent");
1213 printf ("%s%s:\n", description, descrip_extra);
1214 print_filtered_help (include_flags, exclude_flags, any_flags,
1215 opts->x_help_columns, opts, lang_mask);
1218 /* Handle target- and language-independent options. Return zero to
1219 generate an "unknown option" message. Only options that need
1220 extra handling need to be listed here; if you simply want
1221 DECODED->value assigned to a variable, it happens automatically. */
1224 common_handle_option (struct gcc_options *opts,
1225 struct gcc_options *opts_set,
1226 const struct cl_decoded_option *decoded,
1227 unsigned int lang_mask, int kind ATTRIBUTE_UNUSED,
1229 const struct cl_option_handlers *handlers,
1230 diagnostic_context *dc)
1232 size_t scode = decoded->opt_index;
1233 const char *arg = decoded->arg;
1234 int value = decoded->value;
1235 enum opt_code code = (enum opt_code) scode;
1237 gcc_assert (decoded->canonical_option_num_elements <= 2);
1242 handle_param (opts, opts_set, loc, arg);
1247 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1248 unsigned int undoc_mask;
1251 undoc_mask = ((opts->x_verbose_flag | opts->x_extra_warnings)
1254 /* First display any single language specific options. */
1255 for (i = 0; i < cl_lang_count; i++)
1257 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0, opts,
1259 /* Next display any multi language specific options. */
1260 print_specific_help (0, undoc_mask, all_langs_mask, opts, lang_mask);
1261 /* Then display any remaining, non-language options. */
1262 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1264 print_specific_help (i, undoc_mask, 0, opts, lang_mask);
1265 opts->x_exit_after_options = true;
1269 case OPT__target_help:
1270 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0, opts, lang_mask);
1271 opts->x_exit_after_options = true;
1273 /* Allow the target a chance to give the user some additional information. */
1280 const char * a = arg;
1281 unsigned int include_flags = 0;
1282 /* Note - by default we include undocumented options when listing
1283 specific classes. If you only want to see documented options
1284 then add ",^undocumented" to the --help= option. E.g.:
1286 --help=target,^undocumented */
1287 unsigned int exclude_flags = 0;
1289 /* Walk along the argument string, parsing each word in turn.
1291 arg = [^]{word}[,{arg}]
1292 word = {optimizers|target|warnings|undocumented|
1293 params|common|<language>} */
1298 const char * string;
1303 { "optimizers", CL_OPTIMIZATION },
1304 { "target", CL_TARGET },
1305 { "warnings", CL_WARNING },
1306 { "undocumented", CL_UNDOCUMENTED },
1307 { "params", CL_PARAMS },
1308 { "joined", CL_JOINED },
1309 { "separate", CL_SEPARATE },
1310 { "common", CL_COMMON },
1313 unsigned int * pflags;
1315 unsigned int lang_flag, specific_flag;
1322 pflags = & exclude_flags;
1325 pflags = & include_flags;
1327 comma = strchr (a, ',');
1338 /* Check to see if the string matches an option class name. */
1339 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1340 if (strncasecmp (a, specifics[i].string, len) == 0)
1342 specific_flag = specifics[i].flag;
1346 /* Check to see if the string matches a language name.
1347 Note - we rely upon the alpha-sorted nature of the entries in
1348 the lang_names array, specifically that shorter names appear
1349 before their longer variants. (i.e. C before C++). That way
1350 when we are attempting to match --help=c for example we will
1351 match with C first and not C++. */
1352 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1353 if (strncasecmp (a, lang_names[i], len) == 0)
1355 lang_flag = 1U << i;
1359 if (specific_flag != 0)
1362 * pflags |= specific_flag;
1365 /* The option's argument matches both the start of a
1366 language name and the start of an option class name.
1367 We have a special case for when the user has
1368 specified "--help=c", but otherwise we have to issue
1370 if (strncasecmp (a, "c", len) == 0)
1371 * pflags |= lang_flag;
1374 "--help argument %q.*s is ambiguous, "
1375 "please be more specific",
1379 else if (lang_flag != 0)
1380 * pflags |= lang_flag;
1383 "unrecognized argument to --help= option: %q.*s",
1392 print_specific_help (include_flags, exclude_flags, 0, opts,
1394 opts->x_exit_after_options = true;
1399 opts->x_exit_after_options = true;
1405 /* Currently handled in a prescan. */
1409 enable_warning_as_error (arg, value, lang_mask, handlers,
1410 opts, opts_set, loc, dc);
1413 case OPT_Wlarger_than_:
1414 opts->x_larger_than_size = value;
1415 opts->x_warn_larger_than = value != -1;
1418 case OPT_Wfatal_errors:
1419 dc->fatal_errors = value;
1422 case OPT_Wframe_larger_than_:
1423 opts->x_frame_larger_than_size = value;
1424 opts->x_warn_frame_larger_than = value != -1;
1427 case OPT_Wstack_usage_:
1428 opts->x_warn_stack_usage = value;
1429 opts->x_flag_stack_usage_info = value != -1;
1432 case OPT_Wstrict_aliasing:
1433 set_Wstrict_aliasing (opts, value);
1436 case OPT_Wstrict_overflow:
1437 opts->x_warn_strict_overflow = (value
1438 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1442 case OPT_Wsystem_headers:
1443 dc->dc_warn_system_headers = value;
1447 opts->x_flag_gen_aux_info = 1;
1450 case OPT_auxbase_strip:
1452 char *tmp = xstrdup (arg);
1453 strip_off_ending (tmp, strlen (tmp));
1455 opts->x_aux_base_name = tmp;
1460 decode_d_option (arg, opts, loc, dc);
1463 case OPT_fcall_used_:
1464 case OPT_fcall_saved_:
1469 case OPT_fdbg_cnt_list:
1473 case OPT_fdebug_prefix_map_:
1477 case OPT_fdiagnostics_show_location_:
1478 diagnostic_prefixing_rule (dc) = (diagnostic_prefixing_rule_t) value;
1481 case OPT_fdiagnostics_show_option:
1482 dc->show_option_requested = value;
1489 case OPT_ffast_math:
1490 set_fast_math_flags (opts, value);
1493 case OPT_funsafe_math_optimizations:
1494 set_unsafe_math_optimizations_flags (opts, value);
1501 case OPT_finline_limit_:
1502 set_param_value ("max-inline-insns-single", value / 2,
1503 opts->x_param_values, opts_set->x_param_values);
1504 set_param_value ("max-inline-insns-auto", value / 2,
1505 opts->x_param_values, opts_set->x_param_values);
1508 case OPT_finstrument_functions_exclude_function_list_:
1509 add_comma_separated_to_vector
1510 (&opts->x_flag_instrument_functions_exclude_functions, arg);
1513 case OPT_finstrument_functions_exclude_file_list_:
1514 add_comma_separated_to_vector
1515 (&opts->x_flag_instrument_functions_exclude_files, arg);
1518 case OPT_fmessage_length_:
1519 pp_set_line_maximum_length (dc->printer, value);
1522 case OPT_fpack_struct_:
1523 if (value <= 0 || (value & (value - 1)) || value > 16)
1525 "structure alignment must be a small power of two, not %d",
1528 opts->x_initial_max_fld_align = value;
1532 case OPT_fplugin_arg_:
1536 case OPT_fprofile_use_:
1537 opts->x_profile_data_prefix = xstrdup (arg);
1538 opts->x_flag_profile_use = true;
1540 /* No break here - do -fprofile-use processing. */
1541 case OPT_fprofile_use:
1542 if (!opts_set->x_flag_branch_probabilities)
1543 opts->x_flag_branch_probabilities = value;
1544 if (!opts_set->x_flag_profile_values)
1545 opts->x_flag_profile_values = value;
1546 if (!opts_set->x_flag_unroll_loops)
1547 opts->x_flag_unroll_loops = value;
1548 if (!opts_set->x_flag_peel_loops)
1549 opts->x_flag_peel_loops = value;
1550 if (!opts_set->x_flag_tracer)
1551 opts->x_flag_tracer = value;
1552 if (!opts_set->x_flag_value_profile_transformations)
1553 opts->x_flag_value_profile_transformations = value;
1554 if (!opts_set->x_flag_inline_functions)
1555 opts->x_flag_inline_functions = value;
1556 if (!opts_set->x_flag_ipa_cp)
1557 opts->x_flag_ipa_cp = value;
1558 if (!opts_set->x_flag_ipa_cp_clone
1559 && value && opts->x_flag_ipa_cp)
1560 opts->x_flag_ipa_cp_clone = value;
1561 if (!opts_set->x_flag_predictive_commoning)
1562 opts->x_flag_predictive_commoning = value;
1563 if (!opts_set->x_flag_unswitch_loops)
1564 opts->x_flag_unswitch_loops = value;
1565 if (!opts_set->x_flag_gcse_after_reload)
1566 opts->x_flag_gcse_after_reload = value;
1569 case OPT_fprofile_generate_:
1570 opts->x_profile_data_prefix = xstrdup (arg);
1572 /* No break here - do -fprofile-generate processing. */
1573 case OPT_fprofile_generate:
1574 if (!opts_set->x_profile_arc_flag)
1575 opts->x_profile_arc_flag = value;
1576 if (!opts_set->x_flag_profile_values)
1577 opts->x_flag_profile_values = value;
1578 if (!opts_set->x_flag_value_profile_transformations)
1579 opts->x_flag_value_profile_transformations = value;
1580 if (!opts_set->x_flag_inline_functions)
1581 opts->x_flag_inline_functions = value;
1582 /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
1583 quadratic. Disable the pass until better memory representation
1585 if (!opts_set->x_flag_ipa_reference && in_lto_p)
1586 opts->x_flag_ipa_reference = false;
1589 case OPT_fshow_column:
1590 dc->show_column = value;
1593 case OPT_frandom_seed:
1594 /* The real switch is -fno-random-seed. */
1600 case OPT_frandom_seed_:
1604 case OPT_fsched_verbose_:
1605 #ifdef INSN_SCHEDULING
1606 /* Handled with Var in common.opt. */
1612 case OPT_fsched_stalled_insns_:
1613 opts->x_flag_sched_stalled_insns = value;
1614 if (opts->x_flag_sched_stalled_insns == 0)
1615 opts->x_flag_sched_stalled_insns = -1;
1618 case OPT_fsched_stalled_insns_dep_:
1619 opts->x_flag_sched_stalled_insns_dep = value;
1622 case OPT_fstack_check_:
1623 if (!strcmp (arg, "no"))
1624 opts->x_flag_stack_check = NO_STACK_CHECK;
1625 else if (!strcmp (arg, "generic"))
1626 /* This is the old stack checking method. */
1627 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1628 ? FULL_BUILTIN_STACK_CHECK
1629 : GENERIC_STACK_CHECK;
1630 else if (!strcmp (arg, "specific"))
1631 /* This is the new stack checking method. */
1632 opts->x_flag_stack_check = STACK_CHECK_BUILTIN
1633 ? FULL_BUILTIN_STACK_CHECK
1634 : STACK_CHECK_STATIC_BUILTIN
1635 ? STATIC_BUILTIN_STACK_CHECK
1636 : GENERIC_STACK_CHECK;
1638 warning_at (loc, 0, "unknown stack check parameter \"%s\"", arg);
1641 case OPT_fstack_limit:
1642 /* The real switch is -fno-stack-limit. */
1648 case OPT_fstack_limit_register_:
1649 case OPT_fstack_limit_symbol_:
1653 case OPT_fstack_usage:
1654 opts->x_flag_stack_usage = value;
1655 opts->x_flag_stack_usage_info = value != 0;
1658 case OPT_ftree_vectorizer_verbose_:
1659 vect_set_verbosity_level (opts, value);
1663 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg, opts, opts_set,
1668 set_debug_level (SDB_DEBUG, false, arg, opts, opts_set, loc);
1672 if (value < 2 || value > 4)
1673 error_at (loc, "dwarf version %d is not supported", value);
1675 dwarf_version = value;
1676 set_debug_level (DWARF2_DEBUG, false, "", opts, opts_set, loc);
1680 set_debug_level (NO_DEBUG, 2, arg, opts, opts_set, loc);
1685 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg, opts, opts_set,
1690 set_debug_level (VMS_DEBUG, false, arg, opts, opts_set, loc);
1695 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg, opts, opts_set,
1699 case OPT_pedantic_errors:
1700 opts->x_pedantic = 1;
1701 dc->pedantic_errors = 1;
1705 opts->x_flag_lto = value ? "" : NULL;
1709 dc->dc_inhibit_warnings = true;
1712 case OPT_fmax_errors_:
1713 dc->max_errors = value;
1716 case OPT_fuse_linker_plugin:
1717 /* No-op. Used by the driver and passed to us because it starts with f.*/
1720 case OPT_Wuninitialized:
1721 /* Also turn on maybe uninitialized warning. */
1722 warn_maybe_uninitialized = value;
1726 /* If the flag was handled in a standard way, assume the lack of
1727 processing here is intentional. */
1728 gcc_assert (option_flag_var (scode, opts));
1735 /* Handle --param NAME=VALUE. */
1737 handle_param (struct gcc_options *opts, struct gcc_options *opts_set,
1738 location_t loc, const char *carg)
1743 arg = xstrdup (carg);
1744 equal = strchr (arg, '=');
1746 error_at (loc, "%s: --param arguments should be of the form NAME=VALUE",
1750 value = integral_argument (equal + 1);
1752 error_at (loc, "invalid --param value %qs", equal + 1);
1756 set_param_value (arg, value,
1757 opts->x_param_values, opts_set->x_param_values);
1764 /* Used to set the level of strict aliasing warnings in OPTS,
1765 when no level is specified (i.e., when -Wstrict-aliasing, and not
1766 -Wstrict-aliasing=level was given).
1767 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1768 and 0 otherwise. After calling this function, wstrict_aliasing will be
1769 set to the default value of -Wstrict_aliasing=level, currently 3. */
1771 set_Wstrict_aliasing (struct gcc_options *opts, int onoff)
1773 gcc_assert (onoff == 0 || onoff == 1);
1775 opts->x_warn_strict_aliasing = 3;
1777 opts->x_warn_strict_aliasing = 0;
1780 /* The following routines are useful in setting all the flags that
1781 -ffast-math and -fno-fast-math imply. */
1783 set_fast_math_flags (struct gcc_options *opts, int set)
1785 if (!opts->frontend_set_flag_unsafe_math_optimizations)
1787 opts->x_flag_unsafe_math_optimizations = set;
1788 set_unsafe_math_optimizations_flags (opts, set);
1790 if (!opts->frontend_set_flag_finite_math_only)
1791 opts->x_flag_finite_math_only = set;
1792 if (!opts->frontend_set_flag_errno_math)
1793 opts->x_flag_errno_math = !set;
1796 if (!opts->frontend_set_flag_signaling_nans)
1797 opts->x_flag_signaling_nans = 0;
1798 if (!opts->frontend_set_flag_rounding_math)
1799 opts->x_flag_rounding_math = 0;
1800 if (!opts->frontend_set_flag_cx_limited_range)
1801 opts->x_flag_cx_limited_range = 1;
1805 /* When -funsafe-math-optimizations is set the following
1806 flags are set as well. */
1808 set_unsafe_math_optimizations_flags (struct gcc_options *opts, int set)
1810 if (!opts->frontend_set_flag_trapping_math)
1811 opts->x_flag_trapping_math = !set;
1812 if (!opts->frontend_set_flag_signed_zeros)
1813 opts->x_flag_signed_zeros = !set;
1814 if (!opts->frontend_set_flag_associative_math)
1815 opts->x_flag_associative_math = set;
1816 if (!opts->frontend_set_flag_reciprocal_math)
1817 opts->x_flag_reciprocal_math = set;
1820 /* Return true iff flags in OPTS are set as if -ffast-math. */
1822 fast_math_flags_set_p (const struct gcc_options *opts)
1824 return (!opts->x_flag_trapping_math
1825 && opts->x_flag_unsafe_math_optimizations
1826 && opts->x_flag_finite_math_only
1827 && !opts->x_flag_signed_zeros
1828 && !opts->x_flag_errno_math);
1831 /* Return true iff flags are set as if -ffast-math but using the flags stored
1832 in the struct cl_optimization structure. */
1834 fast_math_flags_struct_set_p (struct cl_optimization *opt)
1836 return (!opt->x_flag_trapping_math
1837 && opt->x_flag_unsafe_math_optimizations
1838 && opt->x_flag_finite_math_only
1839 && !opt->x_flag_signed_zeros
1840 && !opt->x_flag_errno_math);
1843 /* Handle a debug output -g switch for options OPTS
1844 (OPTS_SET->x_write_symbols storing whether a debug type was passed
1845 explicitly), location LOC. EXTENDED is true or false to support
1846 extended output (2 is special and means "-ggdb" was given). */
1848 set_debug_level (enum debug_info_type type, int extended, const char *arg,
1849 struct gcc_options *opts, struct gcc_options *opts_set,
1852 opts->x_use_gnu_debug_info_extensions = extended;
1854 if (type == NO_DEBUG)
1856 if (opts->x_write_symbols == NO_DEBUG)
1858 opts->x_write_symbols = PREFERRED_DEBUGGING_TYPE;
1862 #ifdef DWARF2_DEBUGGING_INFO
1863 opts->x_write_symbols = DWARF2_DEBUG;
1864 #elif defined DBX_DEBUGGING_INFO
1865 opts->x_write_symbols = DBX_DEBUG;
1869 if (opts->x_write_symbols == NO_DEBUG)
1870 warning_at (loc, 0, "target system does not support debug output");
1875 /* Does it conflict with an already selected type? */
1876 if (opts_set->x_write_symbols != NO_DEBUG
1877 && opts->x_write_symbols != NO_DEBUG
1878 && type != opts->x_write_symbols)
1879 error_at (loc, "debug format \"%s\" conflicts with prior selection",
1880 debug_type_names[type]);
1881 opts->x_write_symbols = type;
1882 opts_set->x_write_symbols = type;
1885 /* A debug flag without a level defaults to level 2. */
1888 if (!opts->x_debug_info_level)
1889 opts->x_debug_info_level = DINFO_LEVEL_NORMAL;
1893 int argval = integral_argument (arg);
1895 error_at (loc, "unrecognised debug output level \"%s\"", arg);
1896 else if (argval > 3)
1897 error_at (loc, "debug output level %s is too high", arg);
1899 opts->x_debug_info_level = (enum debug_info_levels) argval;
1903 /* Arrange to dump core on error for diagnostic context DC. (The
1904 regular error message is still printed first, except in the case of
1908 setup_core_dumping (diagnostic_context *dc)
1911 signal (SIGABRT, SIG_DFL);
1913 #if defined(HAVE_SETRLIMIT)
1916 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
1917 fatal_error ("getting core file size maximum limit: %m");
1918 rlim.rlim_cur = rlim.rlim_max;
1919 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
1920 fatal_error ("setting core file size limit to maximum: %m");
1923 diagnostic_abort_on_error (dc);
1926 /* Parse a -d<ARG> command line switch for OPTS, location LOC,
1927 diagnostic context DC. */
1930 decode_d_option (const char *arg, struct gcc_options *opts,
1931 location_t loc, diagnostic_context *dc)
1939 opts->x_flag_debug_asm = 1;
1942 opts->x_flag_print_asm_name = 1;
1945 opts->x_flag_dump_rtl_in_asm = 1;
1946 opts->x_flag_print_asm_name = 1;
1949 opts->x_graph_dump_format = vcg;
1952 opts->x_rtl_dump_and_exit = 1;
1954 case 'D': /* These are handled by the preprocessor. */
1961 setup_core_dumping (dc);
1964 opts->x_flag_dump_all_passed = true;
1968 warning_at (loc, 0, "unrecognized gcc debugging option: %c", c);
1973 /* Enable (or disable if VALUE is 0) a warning option ARG (language
1974 mask LANG_MASK, option handlers HANDLERS) as an error for option
1975 structures OPTS and OPTS_SET, diagnostic context DC (possibly
1976 NULL), location LOC. This is used by -Werror=. */
1979 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask,
1980 const struct cl_option_handlers *handlers,
1981 struct gcc_options *opts,
1982 struct gcc_options *opts_set,
1983 location_t loc, diagnostic_context *dc)
1988 new_option = XNEWVEC (char, strlen (arg) + 2);
1989 new_option[0] = 'W';
1990 strcpy (new_option + 1, arg);
1991 option_index = find_opt (new_option, lang_mask);
1992 if (option_index == OPT_SPECIAL_unknown)
1994 error_at (loc, "-Werror=%s: no option -%s", arg, new_option);
1998 const diagnostic_t kind = value ? DK_ERROR : DK_WARNING;
2000 control_warning_option (option_index, (int) kind, value,
2002 handlers, opts, opts_set, dc);
2003 if (option_index == OPT_Wuninitialized)
2004 enable_warning_as_error ("maybe-uninitialized", value, lang_mask,
2005 handlers, opts, opts_set, loc, dc);
2010 /* Return malloced memory for the name of the option OPTION_INDEX
2011 which enabled a diagnostic (context CONTEXT), originally of type
2012 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2016 option_name (diagnostic_context *context, int option_index,
2017 diagnostic_t orig_diag_kind, diagnostic_t diag_kind)
2021 /* A warning classified as an error. */
2022 if ((orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN)
2023 && diag_kind == DK_ERROR)
2024 return concat (cl_options[OPT_Werror_].opt_text,
2025 /* Skip over "-W". */
2026 cl_options[option_index].opt_text + 2,
2028 /* A warning with option. */
2030 return xstrdup (cl_options[option_index].opt_text);
2032 /* A warning without option classified as an error. */
2033 else if (orig_diag_kind == DK_WARNING || orig_diag_kind == DK_PEDWARN
2034 || diag_kind == DK_WARNING)
2036 if (context->warning_as_error_requested)
2037 return xstrdup (cl_options[OPT_Werror].opt_text);
2039 return xstrdup (_("enabled by default"));