1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
32 #include "langhooks.h"
38 #include "diagnostic.h"
39 #include "opts-diagnostic.h"
40 #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
41 #include "insn-attr.h" /* For INSN_SCHEDULING. */
43 #include "tree-pass.h"
48 #include "lto-streamer.h"
50 /* Value of the -G xx switch, and whether it was passed or not. */
51 unsigned HOST_WIDE_INT g_switch_value
;
54 /* Same for selective scheduling. */
55 bool sel_sched_switch_set
;
57 /* True if we should exit after parsing options. */
58 bool exit_after_options
;
60 /* True to warn about any objects definitions whose size is larger
61 than N bytes. Also want about function definitions whose returned
62 values are larger than N bytes, where N is `larger_than_size'. */
63 bool warn_larger_than
;
64 HOST_WIDE_INT larger_than_size
;
66 /* True to warn about any function whose frame size is larger
68 bool warn_frame_larger_than
;
69 HOST_WIDE_INT frame_larger_than_size
;
71 /* Type(s) of debugging information we are producing (if any). See
72 flags.h for the definitions of the different possible types of
73 debugging information. */
74 enum debug_info_type write_symbols
= NO_DEBUG
;
76 /* Level of debugging information we are producing. See flags.h for
77 the definitions of the different possible levels. */
78 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
80 /* A major contribution to object and executable size is debug
81 information size. A major contribution to debug information size
82 is struct descriptions replicated in several object files. The
83 following flags attempt to reduce this information. The basic
84 idea is to not emit struct debugging information in the current
85 compilation unit when that information will be generated by
86 another compilation unit.
88 Debug information for a struct defined in the current source
89 file should be generated in the object file. Likewise the
90 debug information for a struct defined in a header should be
91 generated in the object file of the corresponding source file.
92 Both of these case are handled when the base name of the file of
93 the struct definition matches the base name of the source file
94 of the current compilation unit. This matching emits minimal
95 struct debugging information.
97 The base file name matching rule above will fail to emit debug
98 information for structs defined in system headers. So a second
99 category of files includes system headers in addition to files
102 The remaining types of files are library headers and application
103 headers. We cannot currently distinguish these two types. */
105 enum debug_struct_file
107 DINFO_STRUCT_FILE_NONE
, /* Debug no structs. */
108 DINFO_STRUCT_FILE_BASE
, /* Debug structs defined in files with the
109 same base name as the compilation unit. */
110 DINFO_STRUCT_FILE_SYS
, /* Also debug structs defined in system
112 DINFO_STRUCT_FILE_ANY
/* Debug structs defined in all files. */
115 /* Generic structs (e.g. templates not explicitly specialized)
116 may not have a compilation unit associated with them, and so
117 may need to be treated differently from ordinary structs.
119 Structs only handled by reference (indirectly), will also usually
120 not need as much debugging information. */
122 static enum debug_struct_file debug_struct_ordinary
[DINFO_USAGE_NUM_ENUMS
]
123 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
124 static enum debug_struct_file debug_struct_generic
[DINFO_USAGE_NUM_ENUMS
]
125 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
127 /* Parse the -femit-struct-debug-detailed option value
128 and set the flag variables. */
130 #define MATCH( prefix, string ) \
131 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
132 ? ((string += sizeof prefix - 1), 1) : 0)
135 set_struct_debug_option (const char *spec
)
137 /* various labels for comparison */
138 static char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
139 static char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
140 static char none_lbl
[] = "none", any_lbl
[] = "any";
141 static char base_lbl
[] = "base", sys_lbl
[] = "sys";
143 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
144 /* Default is to apply to as much as possible. */
145 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
146 int ord
= 1, gen
= 1;
149 if (MATCH (dfn_lbl
, spec
))
150 usage
= DINFO_USAGE_DFN
;
151 else if (MATCH (dir_lbl
, spec
))
152 usage
= DINFO_USAGE_DIR_USE
;
153 else if (MATCH (ind_lbl
, spec
))
154 usage
= DINFO_USAGE_IND_USE
;
156 /* Generics or not? */
157 if (MATCH (ord_lbl
, spec
))
159 else if (MATCH (gen_lbl
, spec
))
162 /* What allowable environment? */
163 if (MATCH (none_lbl
, spec
))
164 files
= DINFO_STRUCT_FILE_NONE
;
165 else if (MATCH (any_lbl
, spec
))
166 files
= DINFO_STRUCT_FILE_ANY
;
167 else if (MATCH (sys_lbl
, spec
))
168 files
= DINFO_STRUCT_FILE_SYS
;
169 else if (MATCH (base_lbl
, spec
))
170 files
= DINFO_STRUCT_FILE_BASE
;
172 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
175 /* Effect the specification. */
176 if (usage
== DINFO_USAGE_NUM_ENUMS
)
180 debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
181 debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
182 debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
186 debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
187 debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
188 debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
194 debug_struct_ordinary
[usage
] = files
;
196 debug_struct_generic
[usage
] = files
;
200 set_struct_debug_option (spec
+1);
203 /* No more -femit-struct-debug-detailed specifications.
206 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
208 if (debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
209 < debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
210 || debug_struct_generic
[DINFO_USAGE_DIR_USE
]
211 < debug_struct_generic
[DINFO_USAGE_IND_USE
])
212 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
213 " as much as %<-femit-struct-debug-detailed=ind:...%>");
217 /* Find the base name of a path, stripping off both directories and
218 a single final extension. */
220 base_of_path (const char *path
, const char **base_out
)
222 const char *base
= path
;
224 const char *p
= path
;
228 if (IS_DIR_SEPARATOR(c
))
243 /* Match the base name of a file to the base name of a compilation unit. */
245 static const char *main_input_basename
;
246 static int main_input_baselength
;
249 matches_main_base (const char *path
)
251 /* Cache the last query. */
252 static const char *last_path
= NULL
;
253 static int last_match
= 0;
254 if (path
!= last_path
)
257 int length
= base_of_path (path
, &base
);
259 last_match
= (length
== main_input_baselength
260 && memcmp (base
, main_input_basename
, length
) == 0);
265 #ifdef DEBUG_DEBUG_STRUCT
268 dump_struct_debug (tree type
, enum debug_info_usage usage
,
269 enum debug_struct_file criterion
, int generic
,
270 int matches
, int result
)
272 /* Find the type name. */
273 tree type_decl
= TYPE_STUB_DECL (type
);
275 const char *name
= 0;
276 if (TREE_CODE (t
) == TYPE_DECL
)
279 name
= IDENTIFIER_POINTER (t
);
281 fprintf (stderr
, " struct %d %s %s %s %s %d %p %s\n",
283 DECL_IN_SYSTEM_HEADER (type_decl
) ? "sys" : "usr",
284 matches
? "bas" : "hdr",
285 generic
? "gen" : "ord",
286 usage
== DINFO_USAGE_DFN
? ";" :
287 usage
== DINFO_USAGE_DIR_USE
? "." : "*",
289 (void*) type_decl
, name
);
292 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
293 dump_struct_debug (type, usage, criterion, generic, matches, result)
297 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
304 should_emit_struct_debug (tree type
, enum debug_info_usage usage
)
306 enum debug_struct_file criterion
;
308 bool generic
= lang_hooks
.types
.generic_p (type
);
311 criterion
= debug_struct_generic
[usage
];
313 criterion
= debug_struct_ordinary
[usage
];
315 if (criterion
== DINFO_STRUCT_FILE_NONE
)
316 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
317 if (criterion
== DINFO_STRUCT_FILE_ANY
)
318 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
320 type_decl
= TYPE_STUB_DECL (type
);
322 if (criterion
== DINFO_STRUCT_FILE_SYS
&& DECL_IN_SYSTEM_HEADER (type_decl
))
323 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
325 if (matches_main_base (DECL_SOURCE_FILE (type_decl
)))
326 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, true, true);
327 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
330 /* Nonzero means use GNU-only extensions in the generated symbolic
331 debugging information. Currently, this only has an effect when
332 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
333 bool use_gnu_debug_info_extensions
;
335 /* The default visibility for all symbols (unless overridden) */
336 enum symbol_visibility default_visibility
= VISIBILITY_DEFAULT
;
338 /* Global visibility options. */
339 struct visibility_flags visibility_options
;
341 /* What to print when a switch has no documentation. */
342 static const char undocumented_msg
[] = N_("This switch lacks documentation");
344 /* Used for bookkeeping on whether user set these flags so
345 -fprofile-use/-fprofile-generate does not use them. */
346 static bool profile_arc_flag_set
, flag_profile_values_set
;
347 static bool flag_unroll_loops_set
, flag_tracer_set
;
348 static bool flag_value_profile_transformations_set
;
349 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
350 static bool flag_inline_functions_set
, flag_ipa_cp_set
, flag_ipa_cp_clone_set
;
351 static bool flag_predictive_commoning_set
, flag_unswitch_loops_set
, flag_gcse_after_reload_set
;
353 /* Functions excluded from profiling. */
355 typedef char *char_p
; /* For DEF_VEC_P. */
357 DEF_VEC_ALLOC_P(char_p
,heap
);
359 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
360 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
362 typedef const char *const_char_p
; /* For DEF_VEC_P. */
363 DEF_VEC_P(const_char_p
);
364 DEF_VEC_ALLOC_P(const_char_p
,heap
);
366 static VEC(const_char_p
,heap
) *ignored_options
;
368 /* Language specific warning pass for unused results. */
369 bool flag_warn_unused_result
= false;
371 /* Input file names. */
372 const char **in_fnames
;
373 unsigned num_in_fnames
;
375 static int common_handle_option (size_t scode
, const char *arg
, int value
,
376 unsigned int lang_mask
, int kind
);
377 static void handle_param (const char *);
378 static char *write_langs (unsigned int lang_mask
);
379 static void complain_wrong_lang (const char *, const struct cl_option
*,
380 unsigned int lang_mask
);
381 static void set_debug_level (enum debug_info_type type
, int extended
,
384 /* Return a malloced slash-separated list of languages in MASK. */
386 write_langs (unsigned int mask
)
388 unsigned int n
= 0, len
= 0;
389 const char *lang_name
;
392 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
393 if (mask
& (1U << n
))
394 len
+= strlen (lang_name
) + 1;
396 result
= XNEWVEC (char, len
);
398 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
399 if (mask
& (1U << n
))
403 strcpy (result
+ len
, lang_name
);
404 len
+= strlen (lang_name
);
412 /* Complain that switch OPT_INDEX does not apply to this front end. */
414 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
415 unsigned int lang_mask
)
417 char *ok_langs
, *bad_lang
;
419 if (!lang_hooks
.complain_wrong_lang_p (option
))
422 ok_langs
= write_langs (option
->flags
);
423 bad_lang
= write_langs (lang_mask
);
425 /* Eventually this should become a hard error IMO. */
426 warning (0, "command line option \"%s\" is valid for %s but not for %s",
427 text
, ok_langs
, bad_lang
);
433 /* Buffer the unknown option described by the string OPT. Currently,
434 we only complain about unknown -Wno-* options if they may have
435 prevented a diagnostic. Otherwise, we just ignore them.
436 Note that if we do complain, it is only as a warning, not an error;
437 passing the compiler an unrecognised -Wno-* option should never
438 change whether the compilation succeeds or fails. */
440 static void postpone_unknown_option_warning(const char *opt
)
442 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
445 /* Produce a warning for each option previously buffered. */
447 void print_ignored_options (void)
449 location_t saved_loc
= input_location
;
453 while (!VEC_empty (const_char_p
, ignored_options
))
456 opt
= VEC_pop (const_char_p
, ignored_options
);
457 warning (0, "unrecognized command line option \"%s\"", opt
);
460 input_location
= saved_loc
;
464 /* Handle option OPT_INDEX, and argument ARG, for the language
465 indicated by LANG_MASK. VALUE is true, unless no- form of an -f or
466 -W option was given. KIND is the diagnostic_t if this is a
467 diagnostics option, DK_UNSPECIFIED otherwise. Returns false if the
468 switch was invalid. */
470 handle_option (int opt_index
, int value
, const char *arg
,
471 unsigned int lang_mask
, int kind
)
473 const struct cl_option
*option
= &cl_options
[opt_index
];
475 if (option
->flag_var
)
476 set_option (opt_index
, value
, arg
, kind
);
478 if (option
->flags
& lang_mask
)
480 if (lang_hooks
.handle_option (opt_index
, arg
, value
, kind
) == 0)
484 lto_register_user_option (opt_index
, arg
, value
, lang_mask
);
488 if (option
->flags
& CL_COMMON
)
490 if (common_handle_option (opt_index
, arg
, value
, lang_mask
, kind
) == 0)
494 lto_register_user_option (opt_index
, arg
, value
, CL_COMMON
);
498 if (option
->flags
& CL_TARGET
)
500 if (!targetm
.handle_option (opt_index
, arg
, value
))
504 lto_register_user_option (opt_index
, arg
, value
, CL_TARGET
);
510 /* Handle the switch DECODED for the language indicated by
513 read_cmdline_option (struct cl_decoded_option
*decoded
,
514 unsigned int lang_mask
)
516 const struct cl_option
*option
;
519 if (decoded
->opt_index
== OPT_SPECIAL_unknown
)
523 if (opt
[1] == 'W' && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
524 /* We don't generate warnings for unknown -Wno-* options
525 unless we issue diagnostics. */
526 postpone_unknown_option_warning (opt
);
528 error ("unrecognized command line option %qs", opt
);
532 option
= &cl_options
[decoded
->opt_index
];
533 opt
= decoded
->orig_option_with_args_text
;
535 if (decoded
->errors
& CL_ERR_DISABLED
)
537 error ("command line option %qs"
538 " is not supported by this configuration", opt
);
542 if (decoded
->errors
& CL_ERR_WRONG_LANG
)
544 complain_wrong_lang (opt
, option
, lang_mask
);
548 if (decoded
->errors
& CL_ERR_MISSING_ARG
)
550 if (option
->missing_argument_error
)
551 error (option
->missing_argument_error
, opt
);
553 error ("missing argument to %qs", opt
);
557 if (decoded
->errors
& CL_ERR_UINT_ARG
)
559 error ("argument to %qs should be a non-negative integer",
564 gcc_assert (!decoded
->errors
);
566 if (!handle_option (decoded
->opt_index
, decoded
->value
, decoded
->arg
,
567 lang_mask
, DK_UNSPECIFIED
))
568 error ("unrecognized command line option %qs", opt
);
571 /* Handle FILENAME from the command line. */
573 add_input_filename (const char *filename
)
576 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
577 in_fnames
[num_in_fnames
- 1] = filename
;
580 /* Add comma-separated strings to a char_p vector. */
583 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
590 /* We never free this string. */
603 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
606 if (*r
== '\\' && r
[1] == ',')
614 if (*token_start
!= '\0')
615 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
618 /* Return whether we should exclude FNDECL from instrumentation. */
621 flag_instrument_functions_exclude_p (tree fndecl
)
623 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
629 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
631 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
635 if (strstr (name
, s
) != NULL
)
640 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
646 name
= DECL_SOURCE_FILE (fndecl
);
648 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
651 if (strstr (name
, s
) != NULL
)
660 /* Handle the vector of command line options. LANG_MASK
661 contains has a single bit set representing the current
664 read_cmdline_options (struct cl_decoded_option
*decoded_options
,
665 unsigned int decoded_options_count
,
666 unsigned int lang_mask
)
670 for (i
= 1; i
< decoded_options_count
; i
++)
672 if (decoded_options
[i
].opt_index
== OPT_SPECIAL_input_file
)
674 if (main_input_filename
== NULL
)
676 main_input_filename
= decoded_options
[i
].arg
;
677 main_input_baselength
678 = base_of_path (main_input_filename
, &main_input_basename
);
680 add_input_filename (decoded_options
[i
].arg
);
684 read_cmdline_option (decoded_options
+ i
, lang_mask
);
688 /* Parse command line options and set default flag values. Do minimal
689 options processing. The decoded options are placed in *DECODED_OPTIONS
690 and *DECODED_OPTIONS_COUNT. */
692 decode_options (unsigned int argc
, const char **argv
,
693 struct cl_decoded_option
**decoded_options
,
694 unsigned int *decoded_options_count
)
696 static bool first_time_p
= true;
697 static int initial_min_crossjump_insns
;
698 static int initial_max_fields_for_field_sensitive
;
699 static int initial_loop_invariant_max_bbs_in_loop
;
700 static unsigned int initial_lang_mask
;
702 unsigned int i
, lang_mask
;
711 /* Perform language-specific options initialization. */
712 initial_lang_mask
= lang_mask
= lang_hooks
.option_lang_mask ();
714 lang_hooks
.initialize_diagnostics (global_dc
);
716 /* Save initial values of parameters we reset. */
717 initial_min_crossjump_insns
718 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
719 initial_max_fields_for_field_sensitive
720 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
721 initial_loop_invariant_max_bbs_in_loop
722 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
725 lang_mask
= initial_lang_mask
;
727 decode_cmdline_options_to_array (argc
, argv
, lang_mask
,
728 decoded_options
, decoded_options_count
);
730 /* Perform language-specific options initialization. */
731 lang_hooks
.init_options (*decoded_options_count
, *decoded_options
);
733 /* Scan to see what optimization level has been specified. That will
734 determine the default value of many flags. */
735 for (i
= 1; i
< *decoded_options_count
; i
++)
737 struct cl_decoded_option
*opt
= &(*decoded_options
)[i
];
738 switch (opt
->opt_index
)
741 if (*opt
->arg
== '\0')
749 const int optimize_val
= integral_argument (opt
->arg
);
750 if (optimize_val
== -1)
751 error ("argument to %qs should be a non-negative integer",
755 optimize
= optimize_val
;
756 if ((unsigned int) optimize
> 255)
767 /* Optimizing for size forces optimize to be 2. */
773 /* -Ofast only adds flags to -O3. */
780 /* Ignore other options in this prescan. */
785 /* Use priority coloring if cover classes is not defined for the
787 if (targetm
.ira_cover_classes
== NULL
)
788 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
790 /* -O1 optimizations. */
791 opt1
= (optimize
>= 1);
792 flag_defer_pop
= opt1
;
794 flag_delayed_branch
= opt1
;
796 #ifdef CAN_DEBUG_WITHOUT_FP
797 flag_omit_frame_pointer
= opt1
;
799 flag_guess_branch_prob
= opt1
;
800 flag_cprop_registers
= opt1
;
801 flag_forward_propagate
= opt1
;
802 flag_if_conversion
= opt1
;
803 flag_if_conversion2
= opt1
;
804 flag_ipa_pure_const
= opt1
;
805 flag_ipa_reference
= opt1
;
806 flag_ipa_profile
= opt1
;
807 flag_merge_constants
= opt1
;
808 flag_split_wide_types
= opt1
;
809 flag_tree_ccp
= opt1
;
810 flag_tree_dce
= opt1
;
811 flag_tree_dom
= opt1
;
812 flag_tree_dse
= opt1
;
813 flag_tree_ter
= opt1
;
814 flag_tree_sra
= opt1
;
815 flag_tree_copyrename
= opt1
;
816 flag_tree_fre
= opt1
;
817 flag_tree_copy_prop
= opt1
;
818 flag_tree_sink
= opt1
;
821 /* -O2 optimizations. */
822 opt2
= (optimize
>= 2);
823 flag_inline_small_functions
= opt2
;
824 flag_indirect_inlining
= opt2
;
825 flag_partial_inlining
= opt2
;
826 flag_thread_jumps
= opt2
;
827 flag_crossjumping
= opt2
;
828 flag_optimize_sibling_calls
= opt2
;
829 flag_cse_follow_jumps
= opt2
;
831 flag_expensive_optimizations
= opt2
;
832 flag_rerun_cse_after_loop
= opt2
;
833 flag_caller_saves
= opt2
;
834 flag_peephole2
= opt2
;
835 #ifdef INSN_SCHEDULING
836 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
837 flag_schedule_insns
= opt2
&& ! optimize_size
;
838 flag_schedule_insns_after_reload
= opt2
;
841 flag_strict_aliasing
= opt2
;
842 flag_strict_overflow
= opt2
;
843 flag_reorder_blocks
= opt2
;
844 flag_reorder_functions
= opt2
;
845 flag_tree_vrp
= opt2
;
846 flag_tree_builtin_call_dce
= opt2
;
847 flag_tree_pre
= opt2
;
848 flag_tree_switch_conversion
= opt2
;
852 /* Track fields in field-sensitive alias analysis. */
853 set_param_value ("max-fields-for-field-sensitive",
854 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
856 /* For -O1 only do loop invariant motion for very small loops. */
857 set_param_value ("loop-invariant-max-bbs-in-loop",
858 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
860 /* -O3 optimizations. */
861 opt3
= (optimize
>= 3);
862 flag_predictive_commoning
= opt3
;
863 flag_inline_functions
= opt3
;
864 flag_unswitch_loops
= opt3
;
865 flag_gcse_after_reload
= opt3
;
866 flag_tree_vectorize
= opt3
;
867 flag_ipa_cp_clone
= opt3
;
868 if (flag_ipa_cp_clone
)
871 /* Just -O1/-O0 optimizations. */
872 opt1_max
= (optimize
<= 1);
873 align_loops
= opt1_max
;
874 align_jumps
= opt1_max
;
875 align_labels
= opt1_max
;
876 align_functions
= opt1_max
;
880 /* Inlining of functions reducing size is a good idea regardless of them
881 being declared inline. */
882 flag_inline_functions
= 1;
884 /* Basic optimization options. */
889 /* We want to crossjump as much as possible. */
890 set_param_value ("min-crossjump-insns", 1);
893 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
895 /* -Ofast adds optimizations to -O3. */
898 /* Which is -ffast-math for now. */
899 set_fast_math_flags (1);
900 /* Allow targets to enable extra options with -Ofast
901 before general options processing so disabling them
902 again afterwards works. */
903 targetm
.handle_ofast ();
906 /* Enable -Werror=coverage-mismatch by default */
907 enable_warning_as_error("coverage-mismatch", 1, lang_mask
);
911 /* Initialize whether `char' is signed. */
912 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
913 /* Set this to a special "uninitialized" value. The actual default is
914 set after target options have been processed. */
915 flag_short_enums
= 2;
917 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
919 target_flags
= targetm
.default_target_flags
;
921 /* Some targets have ABI-specified unwind tables. */
922 flag_unwind_tables
= targetm
.unwind_tables_default
;
926 /* Clear any options currently held for LTO. */
927 lto_clear_user_options ();
930 #ifdef OPTIMIZATION_OPTIONS
931 /* Allow default optimizations to be specified on a per-machine basis. */
932 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
935 read_cmdline_options (*decoded_options
, *decoded_options_count
, lang_mask
);
937 if (dump_base_name
&& ! IS_ABSOLUTE_PATH (dump_base_name
))
939 /* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
940 directory. Then try to make DUMP_BASE_NAME relative to the
941 AUX_BASE_NAME directory, typically the directory to contain
944 dump_base_name
= concat (dump_dir_name
, dump_base_name
, NULL
);
945 else if (aux_base_name
)
947 const char *aux_base
;
949 base_of_path (aux_base_name
, &aux_base
);
950 if (aux_base_name
!= aux_base
)
952 int dir_len
= aux_base
- aux_base_name
;
953 char *new_dump_base_name
=
954 XNEWVEC (char, strlen(dump_base_name
) + dir_len
+ 1);
956 /* Copy directory component from AUX_BASE_NAME. */
957 memcpy (new_dump_base_name
, aux_base_name
, dir_len
);
958 /* Append existing DUMP_BASE_NAME. */
959 strcpy (new_dump_base_name
+ dir_len
, dump_base_name
);
960 dump_base_name
= new_dump_base_name
;
965 /* Handle related options for unit-at-a-time, toplevel-reorder, and
967 if (!flag_unit_at_a_time
)
969 if (flag_section_anchors
== 1)
970 error ("Section anchors must be disabled when unit-at-a-time "
972 flag_section_anchors
= 0;
973 if (flag_toplevel_reorder
== 1)
974 error ("Toplevel reorder must be disabled when unit-at-a-time "
976 flag_toplevel_reorder
= 0;
979 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
980 if (warn_missing_noreturn
)
981 warn_suggest_attribute_noreturn
= true;
983 /* Unless the user has asked for section anchors, we disable toplevel
984 reordering at -O0 to disable transformations that might be surprising
985 to end users and to get -fno-toplevel-reorder tested. */
986 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
988 flag_toplevel_reorder
= 0;
989 flag_section_anchors
= 0;
991 if (!flag_toplevel_reorder
)
993 if (flag_section_anchors
== 1)
994 error ("section anchors must be disabled when toplevel reorder"
996 flag_section_anchors
= 0;
1002 flag_pic
= flag_pie
;
1003 if (flag_pic
&& !flag_pie
)
1005 first_time_p
= false;
1010 /* Inlining does not work if not optimizing,
1011 so force it not to be done. */
1016 /* The optimization to partition hot and cold basic blocks into separate
1017 sections of the .o and executable files does not work (currently)
1018 with exception handling. This is because there is no support for
1019 generating unwind info. If flag_exceptions is turned on we need to
1020 turn off the partitioning optimization. */
1022 if (flag_exceptions
&& flag_reorder_blocks_and_partition
1023 && (USING_SJLJ_EXCEPTIONS
1024 #ifdef TARGET_UNWIND_INFO
1029 inform (input_location
,
1030 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1031 flag_reorder_blocks_and_partition
= 0;
1032 flag_reorder_blocks
= 1;
1035 /* If user requested unwind info, then turn off the partitioning
1038 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1039 && flag_reorder_blocks_and_partition
1040 && (USING_SJLJ_EXCEPTIONS
1041 #ifdef TARGET_UNWIND_INFO
1046 inform (input_location
,
1047 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1048 flag_reorder_blocks_and_partition
= 0;
1049 flag_reorder_blocks
= 1;
1052 /* If the target requested unwind info, then turn off the partitioning
1053 optimization with a different message. Likewise, if the target does not
1054 support named sections. */
1056 if (flag_reorder_blocks_and_partition
1057 && (!targetm
.have_named_sections
1058 || (flag_unwind_tables
&& targetm
.unwind_tables_default
1059 && (USING_SJLJ_EXCEPTIONS
1060 #ifdef TARGET_UNWIND_INFO
1065 inform (input_location
,
1066 "-freorder-blocks-and-partition does not work on this architecture");
1067 flag_reorder_blocks_and_partition
= 0;
1068 flag_reorder_blocks
= 1;
1071 /* Pipelining of outer loops is only possible when general pipelining
1072 capabilities are requested. */
1073 if (!flag_sel_sched_pipelining
)
1074 flag_sel_sched_pipelining_outer_loops
= 0;
1076 if (!targetm
.ira_cover_classes
1077 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1079 inform (input_location
,
1080 "-fira-algorithm=CB does not work on this architecture");
1081 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1084 if (flag_conserve_stack
)
1086 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1087 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1088 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1089 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1091 if (flag_wpa
|| flag_ltrans
)
1093 /* These passes are not WHOPR compatible yet. */
1095 flag_ipa_struct_reorg
= 0;
1098 if (flag_lto
|| flag_whopr
)
1101 flag_generate_lto
= 1;
1103 /* When generating IL, do not operate in whole-program mode.
1104 Otherwise, symbols will be privatized too early, causing link
1106 flag_whole_program
= 0;
1108 error ("LTO support has not been enabled in this configuration");
1112 /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
1113 check option consistency. */
1114 if (flag_lto
&& flag_whopr
)
1115 error ("-flto and -fwhopr are mutually exclusive");
1118 #define LEFT_COLUMN 27
1120 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1121 followed by word-wrapped HELP in a second column. */
1123 wrap_help (const char *help
,
1125 unsigned int item_width
,
1126 unsigned int columns
)
1128 unsigned int col_width
= LEFT_COLUMN
;
1129 unsigned int remaining
, room
, len
;
1131 remaining
= strlen (help
);
1135 room
= columns
- 3 - MAX (col_width
, item_width
);
1144 for (i
= 0; help
[i
]; i
++)
1146 if (i
>= room
&& len
!= remaining
)
1150 else if ((help
[i
] == '-' || help
[i
] == '/')
1151 && help
[i
+ 1] != ' '
1152 && i
> 0 && ISALPHA (help
[i
- 1]))
1157 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1159 while (help
[len
] == ' ')
1167 /* Print help for a specific front-end, etc. */
1169 print_filtered_help (unsigned int include_flags
,
1170 unsigned int exclude_flags
,
1171 unsigned int any_flags
,
1172 unsigned int columns
)
1176 static char *printed
= NULL
;
1178 bool displayed
= false;
1180 if (include_flags
== CL_PARAMS
)
1182 for (i
= 0; i
< LAST_PARAM
; i
++)
1184 const char *param
= compiler_params
[i
].option
;
1186 help
= compiler_params
[i
].help
;
1187 if (help
== NULL
|| *help
== '\0')
1189 if (exclude_flags
& CL_UNDOCUMENTED
)
1191 help
= undocumented_msg
;
1194 /* Get the translation. */
1197 wrap_help (help
, param
, strlen (param
), columns
);
1204 printed
= XCNEWVAR (char, cl_options_count
);
1206 for (i
= 0; i
< cl_options_count
; i
++)
1208 static char new_help
[128];
1209 const struct cl_option
*option
= cl_options
+ i
;
1214 if (include_flags
== 0
1215 || ((option
->flags
& include_flags
) != include_flags
))
1217 if ((option
->flags
& any_flags
) == 0)
1221 /* Skip unwanted switches. */
1222 if ((option
->flags
& exclude_flags
) != 0)
1226 /* Skip switches that have already been printed. */
1232 help
= option
->help
;
1235 if (exclude_flags
& CL_UNDOCUMENTED
)
1237 help
= undocumented_msg
;
1240 /* Get the translation. */
1243 /* Find the gap between the name of the
1244 option and its descriptive text. */
1245 tab
= strchr (help
, '\t');
1254 opt
= option
->opt_text
;
1258 /* With the -Q option enabled we change the descriptive text associated
1259 with an option to be an indication of its current setting. */
1262 if (len
< (LEFT_COLUMN
+ 2))
1263 strcpy (new_help
, "\t\t");
1265 strcpy (new_help
, "\t");
1267 if (option
->flag_var
!= NULL
)
1269 if (option
->flags
& CL_JOINED
)
1271 if (option
->var_type
== CLVC_STRING
)
1273 if (* (const char **) option
->flag_var
!= NULL
)
1274 snprintf (new_help
+ strlen (new_help
),
1275 sizeof (new_help
) - strlen (new_help
),
1276 * (const char **) option
->flag_var
);
1279 sprintf (new_help
+ strlen (new_help
),
1280 "%#x", * (int *) option
->flag_var
);
1283 strcat (new_help
, option_enabled (i
)
1284 ? _("[enabled]") : _("[disabled]"));
1290 wrap_help (help
, opt
, len
, columns
);
1296 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1299 printf (_(" No options with the desired characteristics were found\n"));
1304 /* PR 31349: Tell the user how to see all of the
1305 options supported by a specific front end. */
1306 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1307 if ((1U << i
) & langs
)
1308 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1309 lang_names
[i
], lang_names
[i
]);
1313 else if (! displayed
)
1314 printf (_(" All options with the desired characteristics have already been displayed\n"));
1319 /* Display help for a specified type of option.
1320 The options must have ALL of the INCLUDE_FLAGS set
1321 ANY of the flags in the ANY_FLAGS set
1322 and NONE of the EXCLUDE_FLAGS set. */
1324 print_specific_help (unsigned int include_flags
,
1325 unsigned int exclude_flags
,
1326 unsigned int any_flags
)
1328 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1329 const char * description
= NULL
;
1330 const char * descrip_extra
= "";
1333 static unsigned int columns
= 0;
1335 /* Sanity check: Make sure that we do not have more
1336 languages than we have bits available to enumerate them. */
1337 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1339 /* If we have not done so already, obtain
1340 the desired maximum width of the output. */
1345 GET_ENVIRONMENT (p
, "COLUMNS");
1348 int value
= atoi (p
);
1355 /* Use a reasonable default. */
1359 /* Decide upon the title for the options that we are going to display. */
1360 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1362 switch (flag
& include_flags
)
1368 description
= _("The following options are target specific");
1371 description
= _("The following options control compiler warning messages");
1373 case CL_OPTIMIZATION
:
1374 description
= _("The following options control optimizations");
1377 description
= _("The following options are language-independent");
1380 description
= _("The --param option recognizes the following as parameters");
1383 if (i
>= cl_lang_count
)
1385 if (exclude_flags
& all_langs_mask
)
1386 description
= _("The following options are specific to just the language ");
1388 description
= _("The following options are supported by the language ");
1389 descrip_extra
= lang_names
[i
];
1394 if (description
== NULL
)
1398 if (include_flags
& CL_UNDOCUMENTED
)
1399 description
= _("The following options are not documented");
1400 else if (include_flags
& CL_SEPARATE
)
1401 description
= _("The following options take separate arguments");
1402 else if (include_flags
& CL_JOINED
)
1403 description
= _("The following options take joined arguments");
1406 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1413 if (any_flags
& all_langs_mask
)
1414 description
= _("The following options are language-related");
1416 description
= _("The following options are language-independent");
1420 printf ("%s%s:\n", description
, descrip_extra
);
1421 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1424 /* Handle target- and language-independent options. Return zero to
1425 generate an "unknown option" message. Only options that need
1426 extra handling need to be listed here; if you simply want
1427 VALUE assigned to a variable, it happens automatically. */
1430 common_handle_option (size_t scode
, const char *arg
, int value
,
1431 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
)
1433 static bool verbose
= false;
1434 enum opt_code code
= (enum opt_code
) scode
;
1449 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1450 unsigned int undoc_mask
;
1453 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1454 /* First display any single language specific options. */
1455 for (i
= 0; i
< cl_lang_count
; i
++)
1457 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1458 /* Next display any multi language specific options. */
1459 print_specific_help (0, undoc_mask
, all_langs_mask
);
1460 /* Then display any remaining, non-language options. */
1461 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1462 print_specific_help (i
, undoc_mask
, 0);
1463 exit_after_options
= true;
1467 case OPT_ftarget_help
:
1468 case OPT__target_help
:
1469 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1470 exit_after_options
= true;
1472 /* Allow the target a chance to give the user some additional information. */
1480 const char * a
= arg
;
1481 unsigned int include_flags
= 0;
1482 /* Note - by default we include undocumented options when listing
1483 specific classes. If you only want to see documented options
1484 then add ",^undocumented" to the --help= option. E.g.:
1486 --help=target,^undocumented */
1487 unsigned int exclude_flags
= 0;
1489 /* Walk along the argument string, parsing each word in turn.
1491 arg = [^]{word}[,{arg}]
1492 word = {optimizers|target|warnings|undocumented|
1493 params|common|<language>} */
1498 const char * string
;
1503 { "optimizers", CL_OPTIMIZATION
},
1504 { "target", CL_TARGET
},
1505 { "warnings", CL_WARNING
},
1506 { "undocumented", CL_UNDOCUMENTED
},
1507 { "params", CL_PARAMS
},
1508 { "joined", CL_JOINED
},
1509 { "separate", CL_SEPARATE
},
1510 { "common", CL_COMMON
},
1513 unsigned int * pflags
;
1515 unsigned int lang_flag
, specific_flag
;
1522 pflags
= & exclude_flags
;
1525 pflags
= & include_flags
;
1527 comma
= strchr (a
, ',');
1538 /* Check to see if the string matches an option class name. */
1539 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1540 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1542 specific_flag
= specifics
[i
].flag
;
1546 /* Check to see if the string matches a language name.
1547 Note - we rely upon the alpha-sorted nature of the entries in
1548 the lang_names array, specifically that shorter names appear
1549 before their longer variants. (i.e. C before C++). That way
1550 when we are attempting to match --help=c for example we will
1551 match with C first and not C++. */
1552 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1553 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1555 lang_flag
= 1U << i
;
1559 if (specific_flag
!= 0)
1562 * pflags
|= specific_flag
;
1565 /* The option's argument matches both the start of a
1566 language name and the start of an option class name.
1567 We have a special case for when the user has
1568 specified "--help=c", but otherwise we have to issue
1570 if (strncasecmp (a
, "c", len
) == 0)
1571 * pflags
|= lang_flag
;
1574 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1578 else if (lang_flag
!= 0)
1579 * pflags
|= lang_flag
;
1582 "warning: unrecognized argument to --help= option: %.*s\n",
1591 print_specific_help (include_flags
, exclude_flags
, 0);
1592 exit_after_options
= true;
1598 exit_after_options
= true;
1602 g_switch_value
= value
;
1603 g_switch_set
= true;
1609 /* Currently handled in a prescan. */
1613 enable_warning_as_error (arg
, value
, lang_mask
);
1616 case OPT_Wlarger_than_
:
1617 /* This form corresponds to -Wlarger-than-.
1618 Kept for backward compatibility.
1619 Don't use it as the first argument of warning(). */
1621 case OPT_Wlarger_than_eq
:
1622 larger_than_size
= value
;
1623 warn_larger_than
= value
!= -1;
1626 case OPT_Wfatal_errors
:
1627 global_dc
->fatal_errors
= value
;
1630 case OPT_Wframe_larger_than_
:
1631 frame_larger_than_size
= value
;
1632 warn_frame_larger_than
= value
!= -1;
1635 case OPT_Wstrict_aliasing
:
1636 set_Wstrict_aliasing (value
);
1639 case OPT_Wstrict_aliasing_
:
1640 warn_strict_aliasing
= value
;
1643 case OPT_Wstrict_overflow
:
1644 warn_strict_overflow
= (value
1645 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1649 case OPT_Wstrict_overflow_
:
1650 warn_strict_overflow
= value
;
1653 case OPT_Wsystem_headers
:
1654 global_dc
->warn_system_headers
= value
;
1658 warn_unused
= value
;
1663 aux_info_file_name
= arg
;
1664 flag_gen_aux_info
= 1;
1668 aux_base_name
= arg
;
1671 case OPT_auxbase_strip
:
1673 char *tmp
= xstrdup (arg
);
1674 strip_off_ending (tmp
, strlen (tmp
));
1676 aux_base_name
= tmp
;
1681 decode_d_option (arg
);
1685 dump_base_name
= arg
;
1689 dump_dir_name
= arg
;
1692 case OPT_falign_functions_
:
1693 align_functions
= value
;
1696 case OPT_falign_jumps_
:
1697 align_jumps
= value
;
1700 case OPT_falign_labels_
:
1701 align_labels
= value
;
1704 case OPT_falign_loops_
:
1705 align_loops
= value
;
1708 case OPT_fbranch_probabilities
:
1709 flag_branch_probabilities_set
= true;
1712 case OPT_fcall_used_
:
1713 fix_register (arg
, 0, 1);
1716 case OPT_fcall_saved_
:
1717 fix_register (arg
, 0, 0);
1721 dbg_cnt_process_opt (arg
);
1724 case OPT_fdbg_cnt_list
:
1725 dbg_cnt_list_all_counters ();
1728 case OPT_fdebug_prefix_map_
:
1729 add_debug_prefix_map (arg
);
1732 case OPT_fdiagnostics_show_location_
:
1733 if (!strcmp (arg
, "once"))
1734 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1735 else if (!strcmp (arg
, "every-line"))
1736 diagnostic_prefixing_rule (global_dc
)
1737 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1742 case OPT_fdiagnostics_show_option
:
1743 global_dc
->show_option_requested
= value
;
1747 if (!dump_switch_p (arg
))
1751 case OPT_fexcess_precision_
:
1752 if (!strcmp (arg
, "fast"))
1753 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1754 else if (!strcmp (arg
, "standard"))
1755 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1757 error ("unknown excess precision style \"%s\"", arg
);
1760 case OPT_ffast_math
:
1761 set_fast_math_flags (value
);
1764 case OPT_funsafe_math_optimizations
:
1765 set_unsafe_math_optimizations_flags (value
);
1769 fix_register (arg
, 1, 1);
1772 case OPT_finline_limit_
:
1773 case OPT_finline_limit_eq
:
1774 set_param_value ("max-inline-insns-single", value
/ 2);
1775 set_param_value ("max-inline-insns-auto", value
/ 2);
1778 case OPT_finstrument_functions_exclude_function_list_
:
1779 add_comma_separated_to_vector
1780 (&flag_instrument_functions_exclude_functions
, arg
);
1783 case OPT_finstrument_functions_exclude_file_list_
:
1784 add_comma_separated_to_vector
1785 (&flag_instrument_functions_exclude_files
, arg
);
1788 case OPT_fmessage_length_
:
1789 pp_set_line_maximum_length (global_dc
->printer
, value
);
1792 case OPT_fpack_struct_
:
1793 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1794 error ("structure alignment must be a small power of two, not %d", value
);
1797 initial_max_fld_align
= value
;
1798 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1802 case OPT_fpeel_loops
:
1803 flag_peel_loops_set
= true;
1807 #ifdef ENABLE_PLUGIN
1808 add_new_plugin (arg
);
1810 error ("Plugin support is disabled. Configure with --enable-plugin.");
1814 case OPT_fplugin_arg_
:
1815 #ifdef ENABLE_PLUGIN
1816 parse_plugin_arg_opt (arg
);
1818 error ("Plugin support is disabled. Configure with --enable-plugin.");
1822 case OPT_fprofile_arcs
:
1823 profile_arc_flag_set
= true;
1826 case OPT_finline_functions
:
1827 flag_inline_functions_set
= true;
1830 case OPT_fprofile_dir_
:
1831 profile_data_prefix
= xstrdup (arg
);
1834 case OPT_fprofile_use_
:
1835 profile_data_prefix
= xstrdup (arg
);
1836 flag_profile_use
= true;
1838 /* No break here - do -fprofile-use processing. */
1839 case OPT_fprofile_use
:
1840 if (!flag_branch_probabilities_set
)
1841 flag_branch_probabilities
= value
;
1842 if (!flag_profile_values_set
)
1843 flag_profile_values
= value
;
1844 if (!flag_unroll_loops_set
)
1845 flag_unroll_loops
= value
;
1846 if (!flag_peel_loops_set
)
1847 flag_peel_loops
= value
;
1848 if (!flag_tracer_set
)
1849 flag_tracer
= value
;
1850 if (!flag_value_profile_transformations_set
)
1851 flag_value_profile_transformations
= value
;
1852 if (!flag_inline_functions_set
)
1853 flag_inline_functions
= value
;
1854 if (!flag_ipa_cp_set
)
1855 flag_ipa_cp
= value
;
1856 if (!flag_ipa_cp_clone_set
1857 && value
&& flag_ipa_cp
)
1858 flag_ipa_cp_clone
= value
;
1859 if (!flag_predictive_commoning_set
)
1860 flag_predictive_commoning
= value
;
1861 if (!flag_unswitch_loops_set
)
1862 flag_unswitch_loops
= value
;
1863 if (!flag_gcse_after_reload_set
)
1864 flag_gcse_after_reload
= value
;
1867 case OPT_fprofile_generate_
:
1868 profile_data_prefix
= xstrdup (arg
);
1870 /* No break here - do -fprofile-generate processing. */
1871 case OPT_fprofile_generate
:
1872 if (!profile_arc_flag_set
)
1873 profile_arc_flag
= value
;
1874 if (!flag_profile_values_set
)
1875 flag_profile_values
= value
;
1876 if (!flag_value_profile_transformations_set
)
1877 flag_value_profile_transformations
= value
;
1878 if (!flag_inline_functions_set
)
1879 flag_inline_functions
= value
;
1882 case OPT_fprofile_values
:
1883 flag_profile_values_set
= true;
1886 case OPT_fshow_column
:
1887 global_dc
->show_column
= value
;
1890 case OPT_fvisibility_
:
1892 if (!strcmp(arg
, "default"))
1893 default_visibility
= VISIBILITY_DEFAULT
;
1894 else if (!strcmp(arg
, "internal"))
1895 default_visibility
= VISIBILITY_INTERNAL
;
1896 else if (!strcmp(arg
, "hidden"))
1897 default_visibility
= VISIBILITY_HIDDEN
;
1898 else if (!strcmp(arg
, "protected"))
1899 default_visibility
= VISIBILITY_PROTECTED
;
1901 error ("unrecognized visibility value \"%s\"", arg
);
1906 flag_value_profile_transformations_set
= true;
1909 case OPT_frandom_seed
:
1910 /* The real switch is -fno-random-seed. */
1913 set_random_seed (NULL
);
1916 case OPT_frandom_seed_
:
1917 set_random_seed (arg
);
1920 case OPT_fselective_scheduling
:
1921 case OPT_fselective_scheduling2
:
1922 sel_sched_switch_set
= true;
1925 case OPT_fsched_verbose_
:
1926 #ifdef INSN_SCHEDULING
1927 fix_sched_param ("verbose", arg
);
1933 case OPT_fsched_stalled_insns_
:
1934 flag_sched_stalled_insns
= value
;
1935 if (flag_sched_stalled_insns
== 0)
1936 flag_sched_stalled_insns
= -1;
1939 case OPT_fsched_stalled_insns_dep_
:
1940 flag_sched_stalled_insns_dep
= value
;
1943 case OPT_fstack_check_
:
1944 if (!strcmp (arg
, "no"))
1945 flag_stack_check
= NO_STACK_CHECK
;
1946 else if (!strcmp (arg
, "generic"))
1947 /* This is the old stack checking method. */
1948 flag_stack_check
= STACK_CHECK_BUILTIN
1949 ? FULL_BUILTIN_STACK_CHECK
1950 : GENERIC_STACK_CHECK
;
1951 else if (!strcmp (arg
, "specific"))
1952 /* This is the new stack checking method. */
1953 flag_stack_check
= STACK_CHECK_BUILTIN
1954 ? FULL_BUILTIN_STACK_CHECK
1955 : STACK_CHECK_STATIC_BUILTIN
1956 ? STATIC_BUILTIN_STACK_CHECK
1957 : GENERIC_STACK_CHECK
;
1959 warning (0, "unknown stack check parameter \"%s\"", arg
);
1962 case OPT_fstack_check
:
1963 /* This is the same as the "specific" mode above. */
1965 flag_stack_check
= STACK_CHECK_BUILTIN
1966 ? FULL_BUILTIN_STACK_CHECK
1967 : STACK_CHECK_STATIC_BUILTIN
1968 ? STATIC_BUILTIN_STACK_CHECK
1969 : GENERIC_STACK_CHECK
;
1971 flag_stack_check
= NO_STACK_CHECK
;
1974 case OPT_fstack_limit
:
1975 /* The real switch is -fno-stack-limit. */
1978 stack_limit_rtx
= NULL_RTX
;
1981 case OPT_fstack_limit_register_
:
1983 int reg
= decode_reg_name (arg
);
1985 error ("unrecognized register name \"%s\"", arg
);
1987 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1991 case OPT_fstack_limit_symbol_
:
1992 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1995 case OPT_ftree_vectorizer_verbose_
:
1996 vect_set_verbosity_level (arg
);
1999 case OPT_ftls_model_
:
2000 if (!strcmp (arg
, "global-dynamic"))
2001 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
2002 else if (!strcmp (arg
, "local-dynamic"))
2003 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
2004 else if (!strcmp (arg
, "initial-exec"))
2005 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
2006 else if (!strcmp (arg
, "local-exec"))
2007 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
2009 warning (0, "unknown tls-model \"%s\"", arg
);
2012 case OPT_fira_algorithm_
:
2013 if (!strcmp (arg
, "CB"))
2014 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
2015 else if (!strcmp (arg
, "priority"))
2016 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
2018 warning (0, "unknown ira algorithm \"%s\"", arg
);
2021 case OPT_fira_region_
:
2022 if (!strcmp (arg
, "one"))
2023 flag_ira_region
= IRA_REGION_ONE
;
2024 else if (!strcmp (arg
, "all"))
2025 flag_ira_region
= IRA_REGION_ALL
;
2026 else if (!strcmp (arg
, "mixed"))
2027 flag_ira_region
= IRA_REGION_MIXED
;
2029 warning (0, "unknown ira region \"%s\"", arg
);
2032 case OPT_fira_verbose_
:
2033 flag_ira_verbose
= value
;
2037 flag_tracer_set
= true;
2041 flag_ipa_cp_set
= true;
2044 case OPT_fipa_cp_clone
:
2045 flag_ipa_cp_clone_set
= true;
2048 case OPT_fpredictive_commoning
:
2049 flag_predictive_commoning_set
= true;
2052 case OPT_funswitch_loops
:
2053 flag_unswitch_loops_set
= true;
2056 case OPT_fgcse_after_reload
:
2057 flag_gcse_after_reload_set
= true;
2060 case OPT_funroll_loops
:
2061 flag_unroll_loops_set
= true;
2065 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2069 set_debug_level (SDB_DEBUG
, false, arg
);
2073 if (value
< 2 || value
> 4)
2074 error ("dwarf version %d is not supported", value
);
2076 dwarf_version
= value
;
2077 set_debug_level (DWARF2_DEBUG
, false, "");
2081 set_debug_level (NO_DEBUG
, 2, arg
);
2086 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2090 set_debug_level (VMS_DEBUG
, false, arg
);
2095 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2099 asm_file_name
= arg
;
2102 case OPT_pedantic_errors
:
2103 flag_pedantic_errors
= pedantic
= 1;
2104 global_dc
->pedantic_errors
= 1;
2112 global_dc
->inhibit_warnings
= true;
2116 case OPT_fcse_skip_blocks
:
2117 case OPT_floop_optimize
:
2118 case OPT_frerun_loop_opt
:
2119 case OPT_fsched2_use_traces
:
2120 case OPT_fstrength_reduce
:
2121 case OPT_ftree_store_copy_prop
:
2122 case OPT_fforce_addr
:
2123 case OPT_ftree_salias
:
2124 case OPT_ftree_store_ccp
:
2125 case OPT_Wunreachable_code
:
2126 case OPT_fargument_alias
:
2127 case OPT_fargument_noalias
:
2128 case OPT_fargument_noalias_anything
:
2129 case OPT_fargument_noalias_global
:
2130 /* These are no-ops, preserved for backward compatibility. */
2133 case OPT_fuse_linker_plugin
:
2134 /* No-op. Used by the driver and passed to us because it starts with f.*/
2138 /* If the flag was handled in a standard way, assume the lack of
2139 processing here is intentional. */
2140 gcc_assert (cl_options
[scode
].flag_var
);
2147 /* Handle --param NAME=VALUE. */
2149 handle_param (const char *carg
)
2154 arg
= xstrdup (carg
);
2155 equal
= strchr (arg
, '=');
2157 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2160 value
= integral_argument (equal
+ 1);
2162 error ("invalid --param value %qs", equal
+ 1);
2166 set_param_value (arg
, value
);
2173 /* Used to set the level of strict aliasing warnings,
2174 when no level is specified (i.e., when -Wstrict-aliasing, and not
2175 -Wstrict-aliasing=level was given).
2176 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2177 and 0 otherwise. After calling this function, wstrict_aliasing will be
2178 set to the default value of -Wstrict_aliasing=level, currently 3. */
2180 set_Wstrict_aliasing (int onoff
)
2182 gcc_assert (onoff
== 0 || onoff
== 1);
2184 warn_strict_aliasing
= 3;
2186 warn_strict_aliasing
= 0;
2189 /* The following routines are useful in setting all the flags that
2190 -ffast-math and -fno-fast-math imply. */
2192 set_fast_math_flags (int set
)
2194 flag_unsafe_math_optimizations
= set
;
2195 set_unsafe_math_optimizations_flags (set
);
2196 flag_finite_math_only
= set
;
2197 flag_errno_math
= !set
;
2200 flag_signaling_nans
= 0;
2201 flag_rounding_math
= 0;
2202 flag_cx_limited_range
= 1;
2206 /* When -funsafe-math-optimizations is set the following
2207 flags are set as well. */
2209 set_unsafe_math_optimizations_flags (int set
)
2211 flag_trapping_math
= !set
;
2212 flag_signed_zeros
= !set
;
2213 flag_associative_math
= set
;
2214 flag_reciprocal_math
= set
;
2217 /* Return true iff flags are set as if -ffast-math. */
2219 fast_math_flags_set_p (void)
2221 return (!flag_trapping_math
2222 && flag_unsafe_math_optimizations
2223 && flag_finite_math_only
2224 && !flag_signed_zeros
2225 && !flag_errno_math
);
2228 /* Return true iff flags are set as if -ffast-math but using the flags stored
2229 in the struct cl_optimization structure. */
2231 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2233 return (!opt
->flag_trapping_math
2234 && opt
->flag_unsafe_math_optimizations
2235 && opt
->flag_finite_math_only
2236 && !opt
->flag_signed_zeros
2237 && !opt
->flag_errno_math
);
2240 /* Handle a debug output -g switch. EXTENDED is true or false to support
2241 extended output (2 is special and means "-ggdb" was given). */
2243 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2245 static bool type_explicit
;
2247 use_gnu_debug_info_extensions
= extended
;
2249 if (type
== NO_DEBUG
)
2251 if (write_symbols
== NO_DEBUG
)
2253 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2257 #ifdef DWARF2_DEBUGGING_INFO
2258 write_symbols
= DWARF2_DEBUG
;
2259 #elif defined DBX_DEBUGGING_INFO
2260 write_symbols
= DBX_DEBUG
;
2264 if (write_symbols
== NO_DEBUG
)
2265 warning (0, "target system does not support debug output");
2270 /* Does it conflict with an already selected type? */
2271 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2272 error ("debug format \"%s\" conflicts with prior selection",
2273 debug_type_names
[type
]);
2274 write_symbols
= type
;
2275 type_explicit
= true;
2278 /* A debug flag without a level defaults to level 2. */
2281 if (!debug_info_level
)
2282 debug_info_level
= DINFO_LEVEL_NORMAL
;
2286 int argval
= integral_argument (arg
);
2288 error ("unrecognised debug output level \"%s\"", arg
);
2289 else if (argval
> 3)
2290 error ("debug output level %s is too high", arg
);
2292 debug_info_level
= (enum debug_info_level
) argval
;
2296 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2297 a simple on-off switch. */
2300 option_enabled (int opt_idx
)
2302 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2304 if (option
->flag_var
)
2305 switch (option
->var_type
)
2308 return *(int *) option
->flag_var
!= 0;
2311 return *(int *) option
->flag_var
== option
->var_value
;
2313 case CLVC_BIT_CLEAR
:
2314 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2317 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2325 /* Fill STATE with the current state of option OPTION. Return true if
2326 there is some state to store. */
2329 get_option_state (int option
, struct cl_option_state
*state
)
2331 if (cl_options
[option
].flag_var
== 0)
2334 switch (cl_options
[option
].var_type
)
2338 state
->data
= cl_options
[option
].flag_var
;
2339 state
->size
= sizeof (int);
2342 case CLVC_BIT_CLEAR
:
2344 state
->ch
= option_enabled (option
);
2345 state
->data
= &state
->ch
;
2350 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2351 if (state
->data
== 0)
2353 state
->size
= strlen ((const char *) state
->data
) + 1;
2359 /* Set *OPTION according to VALUE and ARG. */
2362 set_option (int opt_index
, int value
, const char *arg
, int kind
)
2364 const struct cl_option
*option
= &cl_options
[opt_index
];
2366 if (!option
->flag_var
)
2369 switch (option
->var_type
)
2372 *(int *) option
->flag_var
= value
;
2376 *(int *) option
->flag_var
= (value
2378 : !option
->var_value
);
2381 case CLVC_BIT_CLEAR
:
2383 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
2384 *(int *) option
->flag_var
|= option
->var_value
;
2386 *(int *) option
->flag_var
&= ~option
->var_value
;
2387 if (option
->flag_var
== &target_flags
)
2388 target_flags_explicit
|= option
->var_value
;
2392 *(const char **) option
->flag_var
= arg
;
2396 if ((diagnostic_t
)kind
!= DK_UNSPECIFIED
)
2397 diagnostic_classify_diagnostic (global_dc
, opt_index
, (diagnostic_t
)kind
,
2402 /* Callback function, called when -Werror= enables a warning. */
2404 static void (*warning_as_error_callback
) (int) = NULL
;
2406 /* Register a callback for enable_warning_as_error calls. */
2409 register_warning_as_error_callback (void (*callback
) (int))
2411 gcc_assert (warning_as_error_callback
== NULL
|| callback
== NULL
);
2412 warning_as_error_callback
= callback
;
2415 /* Enable a warning option as an error. This is used by -Werror= and
2416 also by legacy Werror-implicit-function-declaration. */
2419 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2424 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2425 new_option
[0] = 'W';
2426 strcpy (new_option
+ 1, arg
);
2427 option_index
= find_opt (new_option
, lang_mask
);
2428 if (option_index
== OPT_SPECIAL_unknown
)
2430 error ("-Werror=%s: No option -%s", arg
, new_option
);
2434 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2436 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
,
2438 if (kind
== DK_ERROR
)
2440 const struct cl_option
* const option
= cl_options
+ option_index
;
2442 /* -Werror=foo implies -Wfoo. */
2443 if (option
->var_type
== CLVC_BOOLEAN
)
2444 handle_option (option_index
, value
, arg
, lang_mask
, (int)kind
);
2446 if (warning_as_error_callback
)
2447 warning_as_error_callback (option_index
);
2453 /* Return malloced memory for the name of the option OPTION_INDEX
2454 which enabled a diagnostic (context CONTEXT), originally of type
2455 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2459 option_name (diagnostic_context
*context
, int option_index
,
2460 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2464 /* A warning classified as an error. */
2465 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2466 && diag_kind
== DK_ERROR
)
2467 return concat (cl_options
[OPT_Werror_
].opt_text
,
2468 /* Skip over "-W". */
2469 cl_options
[option_index
].opt_text
+ 2,
2471 /* A warning with option. */
2473 return xstrdup (cl_options
[option_index
].opt_text
);
2475 /* A warning without option classified as an error. */
2476 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2477 || diag_kind
== DK_WARNING
)
2479 if (context
->warning_as_error_requested
)
2480 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2482 return xstrdup (_("enabled by default"));