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 (!lang_hooks
.missing_argument (opt
, decoded
->opt_index
))
551 error ("missing argument to %qs", opt
);
555 if (decoded
->errors
& CL_ERR_UINT_ARG
)
557 error ("argument to %qs should be a non-negative integer",
562 gcc_assert (!decoded
->errors
);
564 if (!handle_option (decoded
->opt_index
, decoded
->value
, decoded
->arg
,
565 lang_mask
, DK_UNSPECIFIED
))
566 error ("unrecognized command line option %qs", opt
);
569 /* Handle FILENAME from the command line. */
571 add_input_filename (const char *filename
)
574 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
575 in_fnames
[num_in_fnames
- 1] = filename
;
578 /* Add comma-separated strings to a char_p vector. */
581 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
588 /* We never free this string. */
601 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
604 if (*r
== '\\' && r
[1] == ',')
612 if (*token_start
!= '\0')
613 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
616 /* Return whether we should exclude FNDECL from instrumentation. */
619 flag_instrument_functions_exclude_p (tree fndecl
)
621 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
627 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
629 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
633 if (strstr (name
, s
) != NULL
)
638 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
644 name
= DECL_SOURCE_FILE (fndecl
);
646 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
649 if (strstr (name
, s
) != NULL
)
658 /* Handle the vector of command line options. LANG_MASK
659 contains has a single bit set representing the current
662 read_cmdline_options (struct cl_decoded_option
*decoded_options
,
663 unsigned int decoded_options_count
,
664 unsigned int lang_mask
)
668 for (i
= 1; i
< decoded_options_count
; i
++)
670 if (decoded_options
[i
].opt_index
== OPT_SPECIAL_input_file
)
672 if (main_input_filename
== NULL
)
674 main_input_filename
= decoded_options
[i
].arg
;
675 main_input_baselength
676 = base_of_path (main_input_filename
, &main_input_basename
);
678 add_input_filename (decoded_options
[i
].arg
);
682 read_cmdline_option (decoded_options
+ i
, lang_mask
);
686 /* Parse command line options and set default flag values. Do minimal
687 options processing. The decoded options are placed in *DECODED_OPTIONS
688 and *DECODED_OPTIONS_COUNT. */
690 decode_options (unsigned int argc
, const char **argv
,
691 struct cl_decoded_option
**decoded_options
,
692 unsigned int *decoded_options_count
)
694 static bool first_time_p
= true;
695 static int initial_min_crossjump_insns
;
696 static int initial_max_fields_for_field_sensitive
;
697 static int initial_loop_invariant_max_bbs_in_loop
;
698 static unsigned int initial_lang_mask
;
700 unsigned int i
, lang_mask
;
709 /* Perform language-specific options initialization. */
710 initial_lang_mask
= lang_mask
= lang_hooks
.option_lang_mask ();
712 lang_hooks
.initialize_diagnostics (global_dc
);
714 /* Save initial values of parameters we reset. */
715 initial_min_crossjump_insns
716 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
717 initial_max_fields_for_field_sensitive
718 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
719 initial_loop_invariant_max_bbs_in_loop
720 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
723 lang_mask
= initial_lang_mask
;
725 decode_cmdline_options_to_array (argc
, argv
, lang_mask
,
726 decoded_options
, decoded_options_count
);
728 /* Perform language-specific options initialization. */
729 lang_hooks
.init_options (*decoded_options_count
, *decoded_options
);
731 /* Scan to see what optimization level has been specified. That will
732 determine the default value of many flags. */
733 for (i
= 1; i
< *decoded_options_count
; i
++)
735 struct cl_decoded_option
*opt
= &(*decoded_options
)[i
];
736 switch (opt
->opt_index
)
739 if (*opt
->arg
== '\0')
747 const int optimize_val
= integral_argument (opt
->arg
);
748 if (optimize_val
== -1)
749 error ("argument to %qs should be a non-negative integer",
753 optimize
= optimize_val
;
754 if ((unsigned int) optimize
> 255)
765 /* Optimizing for size forces optimize to be 2. */
771 /* -Ofast only adds flags to -O3. */
778 /* Ignore other options in this prescan. */
783 /* Use priority coloring if cover classes is not defined for the
785 if (targetm
.ira_cover_classes
== NULL
)
786 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
788 /* -O1 optimizations. */
789 opt1
= (optimize
>= 1);
790 flag_defer_pop
= opt1
;
792 flag_delayed_branch
= opt1
;
794 #ifdef CAN_DEBUG_WITHOUT_FP
795 flag_omit_frame_pointer
= opt1
;
797 flag_guess_branch_prob
= opt1
;
798 flag_cprop_registers
= opt1
;
799 flag_forward_propagate
= opt1
;
800 flag_if_conversion
= opt1
;
801 flag_if_conversion2
= opt1
;
802 flag_ipa_pure_const
= opt1
;
803 flag_ipa_reference
= opt1
;
804 flag_ipa_profile
= opt1
;
805 flag_merge_constants
= opt1
;
806 flag_split_wide_types
= opt1
;
807 flag_tree_ccp
= opt1
;
808 flag_tree_dce
= opt1
;
809 flag_tree_dom
= opt1
;
810 flag_tree_dse
= opt1
;
811 flag_tree_ter
= opt1
;
812 flag_tree_sra
= opt1
;
813 flag_tree_copyrename
= opt1
;
814 flag_tree_fre
= opt1
;
815 flag_tree_copy_prop
= opt1
;
816 flag_tree_sink
= opt1
;
819 /* -O2 optimizations. */
820 opt2
= (optimize
>= 2);
821 flag_inline_small_functions
= opt2
;
822 flag_indirect_inlining
= opt2
;
823 flag_partial_inlining
= opt2
;
824 flag_thread_jumps
= opt2
;
825 flag_crossjumping
= opt2
;
826 flag_optimize_sibling_calls
= opt2
;
827 flag_cse_follow_jumps
= opt2
;
829 flag_expensive_optimizations
= opt2
;
830 flag_rerun_cse_after_loop
= opt2
;
831 flag_caller_saves
= opt2
;
832 flag_peephole2
= opt2
;
833 #ifdef INSN_SCHEDULING
834 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
835 flag_schedule_insns
= opt2
&& ! optimize_size
;
836 flag_schedule_insns_after_reload
= opt2
;
839 flag_strict_aliasing
= opt2
;
840 flag_strict_overflow
= opt2
;
841 flag_reorder_blocks
= opt2
;
842 flag_reorder_functions
= opt2
;
843 flag_tree_vrp
= opt2
;
844 flag_tree_builtin_call_dce
= opt2
;
845 flag_tree_pre
= opt2
;
846 flag_tree_switch_conversion
= opt2
;
850 /* Track fields in field-sensitive alias analysis. */
851 set_param_value ("max-fields-for-field-sensitive",
852 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
854 /* For -O1 only do loop invariant motion for very small loops. */
855 set_param_value ("loop-invariant-max-bbs-in-loop",
856 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
858 /* -O3 optimizations. */
859 opt3
= (optimize
>= 3);
860 flag_predictive_commoning
= opt3
;
861 flag_inline_functions
= opt3
;
862 flag_unswitch_loops
= opt3
;
863 flag_gcse_after_reload
= opt3
;
864 flag_tree_vectorize
= opt3
;
865 flag_ipa_cp_clone
= opt3
;
866 if (flag_ipa_cp_clone
)
869 /* Just -O1/-O0 optimizations. */
870 opt1_max
= (optimize
<= 1);
871 align_loops
= opt1_max
;
872 align_jumps
= opt1_max
;
873 align_labels
= opt1_max
;
874 align_functions
= opt1_max
;
878 /* Inlining of functions reducing size is a good idea regardless of them
879 being declared inline. */
880 flag_inline_functions
= 1;
882 /* Basic optimization options. */
887 /* We want to crossjump as much as possible. */
888 set_param_value ("min-crossjump-insns", 1);
891 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
893 /* -Ofast adds optimizations to -O3. */
896 /* Which is -ffast-math for now. */
897 set_fast_math_flags (1);
898 /* Allow targets to enable extra options with -Ofast
899 before general options processing so disabling them
900 again afterwards works. */
901 targetm
.handle_ofast ();
904 /* Enable -Werror=coverage-mismatch by default */
905 enable_warning_as_error("coverage-mismatch", 1, lang_mask
);
909 /* Initialize whether `char' is signed. */
910 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
911 /* Set this to a special "uninitialized" value. The actual default is
912 set after target options have been processed. */
913 flag_short_enums
= 2;
915 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
917 target_flags
= targetm
.default_target_flags
;
919 /* Some targets have ABI-specified unwind tables. */
920 flag_unwind_tables
= targetm
.unwind_tables_default
;
924 /* Clear any options currently held for LTO. */
925 lto_clear_user_options ();
928 #ifdef OPTIMIZATION_OPTIONS
929 /* Allow default optimizations to be specified on a per-machine basis. */
930 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
933 read_cmdline_options (*decoded_options
, *decoded_options_count
, lang_mask
);
935 if (dump_base_name
&& ! IS_ABSOLUTE_PATH (dump_base_name
))
937 /* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
938 directory. Then try to make DUMP_BASE_NAME relative to the
939 AUX_BASE_NAME directory, typically the directory to contain
942 dump_base_name
= concat (dump_dir_name
, dump_base_name
, NULL
);
943 else if (aux_base_name
)
945 const char *aux_base
;
947 base_of_path (aux_base_name
, &aux_base
);
948 if (aux_base_name
!= aux_base
)
950 int dir_len
= aux_base
- aux_base_name
;
951 char *new_dump_base_name
=
952 XNEWVEC (char, strlen(dump_base_name
) + dir_len
+ 1);
954 /* Copy directory component from AUX_BASE_NAME. */
955 memcpy (new_dump_base_name
, aux_base_name
, dir_len
);
956 /* Append existing DUMP_BASE_NAME. */
957 strcpy (new_dump_base_name
+ dir_len
, dump_base_name
);
958 dump_base_name
= new_dump_base_name
;
963 /* Handle related options for unit-at-a-time, toplevel-reorder, and
965 if (!flag_unit_at_a_time
)
967 if (flag_section_anchors
== 1)
968 error ("Section anchors must be disabled when unit-at-a-time "
970 flag_section_anchors
= 0;
971 if (flag_toplevel_reorder
== 1)
972 error ("Toplevel reorder must be disabled when unit-at-a-time "
974 flag_toplevel_reorder
= 0;
977 /* -Wmissing-noreturn is alias for -Wsuggest-attribute=noreturn. */
978 if (warn_missing_noreturn
)
979 warn_suggest_attribute_noreturn
= true;
981 /* Unless the user has asked for section anchors, we disable toplevel
982 reordering at -O0 to disable transformations that might be surprising
983 to end users and to get -fno-toplevel-reorder tested. */
984 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
986 flag_toplevel_reorder
= 0;
987 flag_section_anchors
= 0;
989 if (!flag_toplevel_reorder
)
991 if (flag_section_anchors
== 1)
992 error ("section anchors must be disabled when toplevel reorder"
994 flag_section_anchors
= 0;
1000 flag_pic
= flag_pie
;
1001 if (flag_pic
&& !flag_pie
)
1003 first_time_p
= false;
1008 /* Inlining does not work if not optimizing,
1009 so force it not to be done. */
1014 /* The optimization to partition hot and cold basic blocks into separate
1015 sections of the .o and executable files does not work (currently)
1016 with exception handling. This is because there is no support for
1017 generating unwind info. If flag_exceptions is turned on we need to
1018 turn off the partitioning optimization. */
1020 if (flag_exceptions
&& flag_reorder_blocks_and_partition
1021 && (USING_SJLJ_EXCEPTIONS
1022 #ifdef TARGET_UNWIND_INFO
1027 inform (input_location
,
1028 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1029 flag_reorder_blocks_and_partition
= 0;
1030 flag_reorder_blocks
= 1;
1033 /* If user requested unwind info, then turn off the partitioning
1036 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1037 && flag_reorder_blocks_and_partition
1038 && (USING_SJLJ_EXCEPTIONS
1039 #ifdef TARGET_UNWIND_INFO
1044 inform (input_location
,
1045 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1046 flag_reorder_blocks_and_partition
= 0;
1047 flag_reorder_blocks
= 1;
1050 /* If the target requested unwind info, then turn off the partitioning
1051 optimization with a different message. Likewise, if the target does not
1052 support named sections. */
1054 if (flag_reorder_blocks_and_partition
1055 && (!targetm
.have_named_sections
1056 || (flag_unwind_tables
&& targetm
.unwind_tables_default
1057 && (USING_SJLJ_EXCEPTIONS
1058 #ifdef TARGET_UNWIND_INFO
1063 inform (input_location
,
1064 "-freorder-blocks-and-partition does not work on this architecture");
1065 flag_reorder_blocks_and_partition
= 0;
1066 flag_reorder_blocks
= 1;
1069 /* Pipelining of outer loops is only possible when general pipelining
1070 capabilities are requested. */
1071 if (!flag_sel_sched_pipelining
)
1072 flag_sel_sched_pipelining_outer_loops
= 0;
1074 if (!targetm
.ira_cover_classes
1075 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1077 inform (input_location
,
1078 "-fira-algorithm=CB does not work on this architecture");
1079 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1082 if (flag_conserve_stack
)
1084 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1085 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1086 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1087 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1089 if (flag_wpa
|| flag_ltrans
)
1091 /* These passes are not WHOPR compatible yet. */
1093 flag_ipa_struct_reorg
= 0;
1096 if (flag_lto
|| flag_whopr
)
1099 flag_generate_lto
= 1;
1101 /* When generating IL, do not operate in whole-program mode.
1102 Otherwise, symbols will be privatized too early, causing link
1104 flag_whole_program
= 0;
1106 error ("LTO support has not been enabled in this configuration");
1110 /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
1111 check option consistency. */
1112 if (flag_lto
&& flag_whopr
)
1113 error ("-flto and -fwhopr are mutually exclusive");
1116 #define LEFT_COLUMN 27
1118 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1119 followed by word-wrapped HELP in a second column. */
1121 wrap_help (const char *help
,
1123 unsigned int item_width
,
1124 unsigned int columns
)
1126 unsigned int col_width
= LEFT_COLUMN
;
1127 unsigned int remaining
, room
, len
;
1129 remaining
= strlen (help
);
1133 room
= columns
- 3 - MAX (col_width
, item_width
);
1142 for (i
= 0; help
[i
]; i
++)
1144 if (i
>= room
&& len
!= remaining
)
1148 else if ((help
[i
] == '-' || help
[i
] == '/')
1149 && help
[i
+ 1] != ' '
1150 && i
> 0 && ISALPHA (help
[i
- 1]))
1155 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1157 while (help
[len
] == ' ')
1165 /* Print help for a specific front-end, etc. */
1167 print_filtered_help (unsigned int include_flags
,
1168 unsigned int exclude_flags
,
1169 unsigned int any_flags
,
1170 unsigned int columns
)
1174 static char *printed
= NULL
;
1176 bool displayed
= false;
1178 if (include_flags
== CL_PARAMS
)
1180 for (i
= 0; i
< LAST_PARAM
; i
++)
1182 const char *param
= compiler_params
[i
].option
;
1184 help
= compiler_params
[i
].help
;
1185 if (help
== NULL
|| *help
== '\0')
1187 if (exclude_flags
& CL_UNDOCUMENTED
)
1189 help
= undocumented_msg
;
1192 /* Get the translation. */
1195 wrap_help (help
, param
, strlen (param
), columns
);
1202 printed
= XCNEWVAR (char, cl_options_count
);
1204 for (i
= 0; i
< cl_options_count
; i
++)
1206 static char new_help
[128];
1207 const struct cl_option
*option
= cl_options
+ i
;
1212 if (include_flags
== 0
1213 || ((option
->flags
& include_flags
) != include_flags
))
1215 if ((option
->flags
& any_flags
) == 0)
1219 /* Skip unwanted switches. */
1220 if ((option
->flags
& exclude_flags
) != 0)
1224 /* Skip switches that have already been printed. */
1230 help
= option
->help
;
1233 if (exclude_flags
& CL_UNDOCUMENTED
)
1235 help
= undocumented_msg
;
1238 /* Get the translation. */
1241 /* Find the gap between the name of the
1242 option and its descriptive text. */
1243 tab
= strchr (help
, '\t');
1252 opt
= option
->opt_text
;
1256 /* With the -Q option enabled we change the descriptive text associated
1257 with an option to be an indication of its current setting. */
1260 if (len
< (LEFT_COLUMN
+ 2))
1261 strcpy (new_help
, "\t\t");
1263 strcpy (new_help
, "\t");
1265 if (option
->flag_var
!= NULL
)
1267 if (option
->flags
& CL_JOINED
)
1269 if (option
->var_type
== CLVC_STRING
)
1271 if (* (const char **) option
->flag_var
!= NULL
)
1272 snprintf (new_help
+ strlen (new_help
),
1273 sizeof (new_help
) - strlen (new_help
),
1274 * (const char **) option
->flag_var
);
1277 sprintf (new_help
+ strlen (new_help
),
1278 "%#x", * (int *) option
->flag_var
);
1281 strcat (new_help
, option_enabled (i
)
1282 ? _("[enabled]") : _("[disabled]"));
1288 wrap_help (help
, opt
, len
, columns
);
1294 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1297 printf (_(" No options with the desired characteristics were found\n"));
1302 /* PR 31349: Tell the user how to see all of the
1303 options supported by a specific front end. */
1304 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1305 if ((1U << i
) & langs
)
1306 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1307 lang_names
[i
], lang_names
[i
]);
1311 else if (! displayed
)
1312 printf (_(" All options with the desired characteristics have already been displayed\n"));
1317 /* Display help for a specified type of option.
1318 The options must have ALL of the INCLUDE_FLAGS set
1319 ANY of the flags in the ANY_FLAGS set
1320 and NONE of the EXCLUDE_FLAGS set. */
1322 print_specific_help (unsigned int include_flags
,
1323 unsigned int exclude_flags
,
1324 unsigned int any_flags
)
1326 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1327 const char * description
= NULL
;
1328 const char * descrip_extra
= "";
1331 static unsigned int columns
= 0;
1333 /* Sanity check: Make sure that we do not have more
1334 languages than we have bits available to enumerate them. */
1335 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1337 /* If we have not done so already, obtain
1338 the desired maximum width of the output. */
1343 GET_ENVIRONMENT (p
, "COLUMNS");
1346 int value
= atoi (p
);
1353 /* Use a reasonable default. */
1357 /* Decide upon the title for the options that we are going to display. */
1358 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1360 switch (flag
& include_flags
)
1366 description
= _("The following options are target specific");
1369 description
= _("The following options control compiler warning messages");
1371 case CL_OPTIMIZATION
:
1372 description
= _("The following options control optimizations");
1375 description
= _("The following options are language-independent");
1378 description
= _("The --param option recognizes the following as parameters");
1381 if (i
>= cl_lang_count
)
1383 if (exclude_flags
& all_langs_mask
)
1384 description
= _("The following options are specific to just the language ");
1386 description
= _("The following options are supported by the language ");
1387 descrip_extra
= lang_names
[i
];
1392 if (description
== NULL
)
1396 if (include_flags
& CL_UNDOCUMENTED
)
1397 description
= _("The following options are not documented");
1398 else if (include_flags
& CL_SEPARATE
)
1399 description
= _("The following options take separate arguments");
1400 else if (include_flags
& CL_JOINED
)
1401 description
= _("The following options take joined arguments");
1404 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1411 if (any_flags
& all_langs_mask
)
1412 description
= _("The following options are language-related");
1414 description
= _("The following options are language-independent");
1418 printf ("%s%s:\n", description
, descrip_extra
);
1419 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1422 /* Handle target- and language-independent options. Return zero to
1423 generate an "unknown option" message. Only options that need
1424 extra handling need to be listed here; if you simply want
1425 VALUE assigned to a variable, it happens automatically. */
1428 common_handle_option (size_t scode
, const char *arg
, int value
,
1429 unsigned int lang_mask
, int kind ATTRIBUTE_UNUSED
)
1431 static bool verbose
= false;
1432 enum opt_code code
= (enum opt_code
) scode
;
1447 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1448 unsigned int undoc_mask
;
1451 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1452 /* First display any single language specific options. */
1453 for (i
= 0; i
< cl_lang_count
; i
++)
1455 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1456 /* Next display any multi language specific options. */
1457 print_specific_help (0, undoc_mask
, all_langs_mask
);
1458 /* Then display any remaining, non-language options. */
1459 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1460 print_specific_help (i
, undoc_mask
, 0);
1461 exit_after_options
= true;
1465 case OPT_ftarget_help
:
1466 case OPT__target_help
:
1467 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1468 exit_after_options
= true;
1470 /* Allow the target a chance to give the user some additional information. */
1478 const char * a
= arg
;
1479 unsigned int include_flags
= 0;
1480 /* Note - by default we include undocumented options when listing
1481 specific classes. If you only want to see documented options
1482 then add ",^undocumented" to the --help= option. E.g.:
1484 --help=target,^undocumented */
1485 unsigned int exclude_flags
= 0;
1487 /* Walk along the argument string, parsing each word in turn.
1489 arg = [^]{word}[,{arg}]
1490 word = {optimizers|target|warnings|undocumented|
1491 params|common|<language>} */
1496 const char * string
;
1501 { "optimizers", CL_OPTIMIZATION
},
1502 { "target", CL_TARGET
},
1503 { "warnings", CL_WARNING
},
1504 { "undocumented", CL_UNDOCUMENTED
},
1505 { "params", CL_PARAMS
},
1506 { "joined", CL_JOINED
},
1507 { "separate", CL_SEPARATE
},
1508 { "common", CL_COMMON
},
1511 unsigned int * pflags
;
1513 unsigned int lang_flag
, specific_flag
;
1520 pflags
= & exclude_flags
;
1523 pflags
= & include_flags
;
1525 comma
= strchr (a
, ',');
1536 /* Check to see if the string matches an option class name. */
1537 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1538 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1540 specific_flag
= specifics
[i
].flag
;
1544 /* Check to see if the string matches a language name.
1545 Note - we rely upon the alpha-sorted nature of the entries in
1546 the lang_names array, specifically that shorter names appear
1547 before their longer variants. (i.e. C before C++). That way
1548 when we are attempting to match --help=c for example we will
1549 match with C first and not C++. */
1550 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1551 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1553 lang_flag
= 1U << i
;
1557 if (specific_flag
!= 0)
1560 * pflags
|= specific_flag
;
1563 /* The option's argument matches both the start of a
1564 language name and the start of an option class name.
1565 We have a special case for when the user has
1566 specified "--help=c", but otherwise we have to issue
1568 if (strncasecmp (a
, "c", len
) == 0)
1569 * pflags
|= lang_flag
;
1572 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1576 else if (lang_flag
!= 0)
1577 * pflags
|= lang_flag
;
1580 "warning: unrecognized argument to --help= option: %.*s\n",
1589 print_specific_help (include_flags
, exclude_flags
, 0);
1590 exit_after_options
= true;
1596 exit_after_options
= true;
1600 g_switch_value
= value
;
1601 g_switch_set
= true;
1607 /* Currently handled in a prescan. */
1611 enable_warning_as_error (arg
, value
, lang_mask
);
1614 case OPT_Wlarger_than_
:
1615 /* This form corresponds to -Wlarger-than-.
1616 Kept for backward compatibility.
1617 Don't use it as the first argument of warning(). */
1619 case OPT_Wlarger_than_eq
:
1620 larger_than_size
= value
;
1621 warn_larger_than
= value
!= -1;
1624 case OPT_Wfatal_errors
:
1625 global_dc
->fatal_errors
= value
;
1628 case OPT_Wframe_larger_than_
:
1629 frame_larger_than_size
= value
;
1630 warn_frame_larger_than
= value
!= -1;
1633 case OPT_Wstrict_aliasing
:
1634 set_Wstrict_aliasing (value
);
1637 case OPT_Wstrict_aliasing_
:
1638 warn_strict_aliasing
= value
;
1641 case OPT_Wstrict_overflow
:
1642 warn_strict_overflow
= (value
1643 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1647 case OPT_Wstrict_overflow_
:
1648 warn_strict_overflow
= value
;
1651 case OPT_Wsystem_headers
:
1652 global_dc
->warn_system_headers
= value
;
1656 warn_unused
= value
;
1661 aux_info_file_name
= arg
;
1662 flag_gen_aux_info
= 1;
1666 aux_base_name
= arg
;
1669 case OPT_auxbase_strip
:
1671 char *tmp
= xstrdup (arg
);
1672 strip_off_ending (tmp
, strlen (tmp
));
1674 aux_base_name
= tmp
;
1679 decode_d_option (arg
);
1683 dump_base_name
= arg
;
1687 dump_dir_name
= arg
;
1690 case OPT_falign_functions_
:
1691 align_functions
= value
;
1694 case OPT_falign_jumps_
:
1695 align_jumps
= value
;
1698 case OPT_falign_labels_
:
1699 align_labels
= value
;
1702 case OPT_falign_loops_
:
1703 align_loops
= value
;
1706 case OPT_fbranch_probabilities
:
1707 flag_branch_probabilities_set
= true;
1710 case OPT_fcall_used_
:
1711 fix_register (arg
, 0, 1);
1714 case OPT_fcall_saved_
:
1715 fix_register (arg
, 0, 0);
1719 dbg_cnt_process_opt (arg
);
1722 case OPT_fdbg_cnt_list
:
1723 dbg_cnt_list_all_counters ();
1726 case OPT_fdebug_prefix_map_
:
1727 add_debug_prefix_map (arg
);
1730 case OPT_fdiagnostics_show_location_
:
1731 if (!strcmp (arg
, "once"))
1732 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1733 else if (!strcmp (arg
, "every-line"))
1734 diagnostic_prefixing_rule (global_dc
)
1735 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1740 case OPT_fdiagnostics_show_option
:
1741 global_dc
->show_option_requested
= value
;
1745 if (!dump_switch_p (arg
))
1749 case OPT_fexcess_precision_
:
1750 if (!strcmp (arg
, "fast"))
1751 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1752 else if (!strcmp (arg
, "standard"))
1753 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1755 error ("unknown excess precision style \"%s\"", arg
);
1758 case OPT_ffast_math
:
1759 set_fast_math_flags (value
);
1762 case OPT_funsafe_math_optimizations
:
1763 set_unsafe_math_optimizations_flags (value
);
1767 fix_register (arg
, 1, 1);
1770 case OPT_finline_limit_
:
1771 case OPT_finline_limit_eq
:
1772 set_param_value ("max-inline-insns-single", value
/ 2);
1773 set_param_value ("max-inline-insns-auto", value
/ 2);
1776 case OPT_finstrument_functions_exclude_function_list_
:
1777 add_comma_separated_to_vector
1778 (&flag_instrument_functions_exclude_functions
, arg
);
1781 case OPT_finstrument_functions_exclude_file_list_
:
1782 add_comma_separated_to_vector
1783 (&flag_instrument_functions_exclude_files
, arg
);
1786 case OPT_fmessage_length_
:
1787 pp_set_line_maximum_length (global_dc
->printer
, value
);
1790 case OPT_fpack_struct_
:
1791 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1792 error ("structure alignment must be a small power of two, not %d", value
);
1795 initial_max_fld_align
= value
;
1796 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1800 case OPT_fpeel_loops
:
1801 flag_peel_loops_set
= true;
1805 #ifdef ENABLE_PLUGIN
1806 add_new_plugin (arg
);
1808 error ("Plugin support is disabled. Configure with --enable-plugin.");
1812 case OPT_fplugin_arg_
:
1813 #ifdef ENABLE_PLUGIN
1814 parse_plugin_arg_opt (arg
);
1816 error ("Plugin support is disabled. Configure with --enable-plugin.");
1820 case OPT_fprofile_arcs
:
1821 profile_arc_flag_set
= true;
1824 case OPT_finline_functions
:
1825 flag_inline_functions_set
= true;
1828 case OPT_fprofile_dir_
:
1829 profile_data_prefix
= xstrdup (arg
);
1832 case OPT_fprofile_use_
:
1833 profile_data_prefix
= xstrdup (arg
);
1834 flag_profile_use
= true;
1836 /* No break here - do -fprofile-use processing. */
1837 case OPT_fprofile_use
:
1838 if (!flag_branch_probabilities_set
)
1839 flag_branch_probabilities
= value
;
1840 if (!flag_profile_values_set
)
1841 flag_profile_values
= value
;
1842 if (!flag_unroll_loops_set
)
1843 flag_unroll_loops
= value
;
1844 if (!flag_peel_loops_set
)
1845 flag_peel_loops
= value
;
1846 if (!flag_tracer_set
)
1847 flag_tracer
= value
;
1848 if (!flag_value_profile_transformations_set
)
1849 flag_value_profile_transformations
= value
;
1850 if (!flag_inline_functions_set
)
1851 flag_inline_functions
= value
;
1852 if (!flag_ipa_cp_set
)
1853 flag_ipa_cp
= value
;
1854 if (!flag_ipa_cp_clone_set
1855 && value
&& flag_ipa_cp
)
1856 flag_ipa_cp_clone
= value
;
1857 if (!flag_predictive_commoning_set
)
1858 flag_predictive_commoning
= value
;
1859 if (!flag_unswitch_loops_set
)
1860 flag_unswitch_loops
= value
;
1861 if (!flag_gcse_after_reload_set
)
1862 flag_gcse_after_reload
= value
;
1865 case OPT_fprofile_generate_
:
1866 profile_data_prefix
= xstrdup (arg
);
1868 /* No break here - do -fprofile-generate processing. */
1869 case OPT_fprofile_generate
:
1870 if (!profile_arc_flag_set
)
1871 profile_arc_flag
= value
;
1872 if (!flag_profile_values_set
)
1873 flag_profile_values
= value
;
1874 if (!flag_value_profile_transformations_set
)
1875 flag_value_profile_transformations
= value
;
1876 if (!flag_inline_functions_set
)
1877 flag_inline_functions
= value
;
1880 case OPT_fprofile_values
:
1881 flag_profile_values_set
= true;
1884 case OPT_fshow_column
:
1885 global_dc
->show_column
= value
;
1888 case OPT_fvisibility_
:
1890 if (!strcmp(arg
, "default"))
1891 default_visibility
= VISIBILITY_DEFAULT
;
1892 else if (!strcmp(arg
, "internal"))
1893 default_visibility
= VISIBILITY_INTERNAL
;
1894 else if (!strcmp(arg
, "hidden"))
1895 default_visibility
= VISIBILITY_HIDDEN
;
1896 else if (!strcmp(arg
, "protected"))
1897 default_visibility
= VISIBILITY_PROTECTED
;
1899 error ("unrecognized visibility value \"%s\"", arg
);
1904 flag_value_profile_transformations_set
= true;
1907 case OPT_frandom_seed
:
1908 /* The real switch is -fno-random-seed. */
1911 set_random_seed (NULL
);
1914 case OPT_frandom_seed_
:
1915 set_random_seed (arg
);
1918 case OPT_fselective_scheduling
:
1919 case OPT_fselective_scheduling2
:
1920 sel_sched_switch_set
= true;
1923 case OPT_fsched_verbose_
:
1924 #ifdef INSN_SCHEDULING
1925 fix_sched_param ("verbose", arg
);
1931 case OPT_fsched_stalled_insns_
:
1932 flag_sched_stalled_insns
= value
;
1933 if (flag_sched_stalled_insns
== 0)
1934 flag_sched_stalled_insns
= -1;
1937 case OPT_fsched_stalled_insns_dep_
:
1938 flag_sched_stalled_insns_dep
= value
;
1941 case OPT_fstack_check_
:
1942 if (!strcmp (arg
, "no"))
1943 flag_stack_check
= NO_STACK_CHECK
;
1944 else if (!strcmp (arg
, "generic"))
1945 /* This is the old stack checking method. */
1946 flag_stack_check
= STACK_CHECK_BUILTIN
1947 ? FULL_BUILTIN_STACK_CHECK
1948 : GENERIC_STACK_CHECK
;
1949 else if (!strcmp (arg
, "specific"))
1950 /* This is the new stack checking method. */
1951 flag_stack_check
= STACK_CHECK_BUILTIN
1952 ? FULL_BUILTIN_STACK_CHECK
1953 : STACK_CHECK_STATIC_BUILTIN
1954 ? STATIC_BUILTIN_STACK_CHECK
1955 : GENERIC_STACK_CHECK
;
1957 warning (0, "unknown stack check parameter \"%s\"", arg
);
1960 case OPT_fstack_check
:
1961 /* This is the same as the "specific" mode above. */
1963 flag_stack_check
= STACK_CHECK_BUILTIN
1964 ? FULL_BUILTIN_STACK_CHECK
1965 : STACK_CHECK_STATIC_BUILTIN
1966 ? STATIC_BUILTIN_STACK_CHECK
1967 : GENERIC_STACK_CHECK
;
1969 flag_stack_check
= NO_STACK_CHECK
;
1972 case OPT_fstack_limit
:
1973 /* The real switch is -fno-stack-limit. */
1976 stack_limit_rtx
= NULL_RTX
;
1979 case OPT_fstack_limit_register_
:
1981 int reg
= decode_reg_name (arg
);
1983 error ("unrecognized register name \"%s\"", arg
);
1985 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1989 case OPT_fstack_limit_symbol_
:
1990 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1993 case OPT_ftree_vectorizer_verbose_
:
1994 vect_set_verbosity_level (arg
);
1997 case OPT_ftls_model_
:
1998 if (!strcmp (arg
, "global-dynamic"))
1999 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
2000 else if (!strcmp (arg
, "local-dynamic"))
2001 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
2002 else if (!strcmp (arg
, "initial-exec"))
2003 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
2004 else if (!strcmp (arg
, "local-exec"))
2005 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
2007 warning (0, "unknown tls-model \"%s\"", arg
);
2010 case OPT_fira_algorithm_
:
2011 if (!strcmp (arg
, "CB"))
2012 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
2013 else if (!strcmp (arg
, "priority"))
2014 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
2016 warning (0, "unknown ira algorithm \"%s\"", arg
);
2019 case OPT_fira_region_
:
2020 if (!strcmp (arg
, "one"))
2021 flag_ira_region
= IRA_REGION_ONE
;
2022 else if (!strcmp (arg
, "all"))
2023 flag_ira_region
= IRA_REGION_ALL
;
2024 else if (!strcmp (arg
, "mixed"))
2025 flag_ira_region
= IRA_REGION_MIXED
;
2027 warning (0, "unknown ira region \"%s\"", arg
);
2030 case OPT_fira_verbose_
:
2031 flag_ira_verbose
= value
;
2035 flag_tracer_set
= true;
2039 flag_ipa_cp_set
= true;
2042 case OPT_fipa_cp_clone
:
2043 flag_ipa_cp_clone_set
= true;
2046 case OPT_fpredictive_commoning
:
2047 flag_predictive_commoning_set
= true;
2050 case OPT_funswitch_loops
:
2051 flag_unswitch_loops_set
= true;
2054 case OPT_fgcse_after_reload
:
2055 flag_gcse_after_reload_set
= true;
2058 case OPT_funroll_loops
:
2059 flag_unroll_loops_set
= true;
2063 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2067 set_debug_level (SDB_DEBUG
, false, arg
);
2071 if (value
< 2 || value
> 4)
2072 error ("dwarf version %d is not supported", value
);
2074 dwarf_version
= value
;
2075 set_debug_level (DWARF2_DEBUG
, false, "");
2079 set_debug_level (NO_DEBUG
, 2, arg
);
2084 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2088 set_debug_level (VMS_DEBUG
, false, arg
);
2093 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2097 asm_file_name
= arg
;
2100 case OPT_pedantic_errors
:
2101 flag_pedantic_errors
= pedantic
= 1;
2102 global_dc
->pedantic_errors
= 1;
2110 global_dc
->inhibit_warnings
= true;
2114 case OPT_fcse_skip_blocks
:
2115 case OPT_floop_optimize
:
2116 case OPT_frerun_loop_opt
:
2117 case OPT_fsched2_use_traces
:
2118 case OPT_fstrength_reduce
:
2119 case OPT_ftree_store_copy_prop
:
2120 case OPT_fforce_addr
:
2121 case OPT_ftree_salias
:
2122 case OPT_ftree_store_ccp
:
2123 case OPT_Wunreachable_code
:
2124 case OPT_fargument_alias
:
2125 case OPT_fargument_noalias
:
2126 case OPT_fargument_noalias_anything
:
2127 case OPT_fargument_noalias_global
:
2128 /* These are no-ops, preserved for backward compatibility. */
2131 case OPT_fuse_linker_plugin
:
2132 /* No-op. Used by the driver and passed to us because it starts with f.*/
2136 /* If the flag was handled in a standard way, assume the lack of
2137 processing here is intentional. */
2138 gcc_assert (cl_options
[scode
].flag_var
);
2145 /* Handle --param NAME=VALUE. */
2147 handle_param (const char *carg
)
2152 arg
= xstrdup (carg
);
2153 equal
= strchr (arg
, '=');
2155 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2158 value
= integral_argument (equal
+ 1);
2160 error ("invalid --param value %qs", equal
+ 1);
2164 set_param_value (arg
, value
);
2171 /* Used to set the level of strict aliasing warnings,
2172 when no level is specified (i.e., when -Wstrict-aliasing, and not
2173 -Wstrict-aliasing=level was given).
2174 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2175 and 0 otherwise. After calling this function, wstrict_aliasing will be
2176 set to the default value of -Wstrict_aliasing=level, currently 3. */
2178 set_Wstrict_aliasing (int onoff
)
2180 gcc_assert (onoff
== 0 || onoff
== 1);
2182 warn_strict_aliasing
= 3;
2184 warn_strict_aliasing
= 0;
2187 /* The following routines are useful in setting all the flags that
2188 -ffast-math and -fno-fast-math imply. */
2190 set_fast_math_flags (int set
)
2192 flag_unsafe_math_optimizations
= set
;
2193 set_unsafe_math_optimizations_flags (set
);
2194 flag_finite_math_only
= set
;
2195 flag_errno_math
= !set
;
2198 flag_signaling_nans
= 0;
2199 flag_rounding_math
= 0;
2200 flag_cx_limited_range
= 1;
2204 /* When -funsafe-math-optimizations is set the following
2205 flags are set as well. */
2207 set_unsafe_math_optimizations_flags (int set
)
2209 flag_trapping_math
= !set
;
2210 flag_signed_zeros
= !set
;
2211 flag_associative_math
= set
;
2212 flag_reciprocal_math
= set
;
2215 /* Return true iff flags are set as if -ffast-math. */
2217 fast_math_flags_set_p (void)
2219 return (!flag_trapping_math
2220 && flag_unsafe_math_optimizations
2221 && flag_finite_math_only
2222 && !flag_signed_zeros
2223 && !flag_errno_math
);
2226 /* Return true iff flags are set as if -ffast-math but using the flags stored
2227 in the struct cl_optimization structure. */
2229 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2231 return (!opt
->flag_trapping_math
2232 && opt
->flag_unsafe_math_optimizations
2233 && opt
->flag_finite_math_only
2234 && !opt
->flag_signed_zeros
2235 && !opt
->flag_errno_math
);
2238 /* Handle a debug output -g switch. EXTENDED is true or false to support
2239 extended output (2 is special and means "-ggdb" was given). */
2241 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2243 static bool type_explicit
;
2245 use_gnu_debug_info_extensions
= extended
;
2247 if (type
== NO_DEBUG
)
2249 if (write_symbols
== NO_DEBUG
)
2251 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2255 #ifdef DWARF2_DEBUGGING_INFO
2256 write_symbols
= DWARF2_DEBUG
;
2257 #elif defined DBX_DEBUGGING_INFO
2258 write_symbols
= DBX_DEBUG
;
2262 if (write_symbols
== NO_DEBUG
)
2263 warning (0, "target system does not support debug output");
2268 /* Does it conflict with an already selected type? */
2269 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2270 error ("debug format \"%s\" conflicts with prior selection",
2271 debug_type_names
[type
]);
2272 write_symbols
= type
;
2273 type_explicit
= true;
2276 /* A debug flag without a level defaults to level 2. */
2279 if (!debug_info_level
)
2280 debug_info_level
= DINFO_LEVEL_NORMAL
;
2284 int argval
= integral_argument (arg
);
2286 error ("unrecognised debug output level \"%s\"", arg
);
2287 else if (argval
> 3)
2288 error ("debug output level %s is too high", arg
);
2290 debug_info_level
= (enum debug_info_level
) argval
;
2294 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2295 a simple on-off switch. */
2298 option_enabled (int opt_idx
)
2300 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2302 if (option
->flag_var
)
2303 switch (option
->var_type
)
2306 return *(int *) option
->flag_var
!= 0;
2309 return *(int *) option
->flag_var
== option
->var_value
;
2311 case CLVC_BIT_CLEAR
:
2312 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2315 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2323 /* Fill STATE with the current state of option OPTION. Return true if
2324 there is some state to store. */
2327 get_option_state (int option
, struct cl_option_state
*state
)
2329 if (cl_options
[option
].flag_var
== 0)
2332 switch (cl_options
[option
].var_type
)
2336 state
->data
= cl_options
[option
].flag_var
;
2337 state
->size
= sizeof (int);
2340 case CLVC_BIT_CLEAR
:
2342 state
->ch
= option_enabled (option
);
2343 state
->data
= &state
->ch
;
2348 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2349 if (state
->data
== 0)
2351 state
->size
= strlen ((const char *) state
->data
) + 1;
2357 /* Set *OPTION according to VALUE and ARG. */
2360 set_option (int opt_index
, int value
, const char *arg
, int kind
)
2362 const struct cl_option
*option
= &cl_options
[opt_index
];
2364 if (!option
->flag_var
)
2367 switch (option
->var_type
)
2370 *(int *) option
->flag_var
= value
;
2374 *(int *) option
->flag_var
= (value
2376 : !option
->var_value
);
2379 case CLVC_BIT_CLEAR
:
2381 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
2382 *(int *) option
->flag_var
|= option
->var_value
;
2384 *(int *) option
->flag_var
&= ~option
->var_value
;
2385 if (option
->flag_var
== &target_flags
)
2386 target_flags_explicit
|= option
->var_value
;
2390 *(const char **) option
->flag_var
= arg
;
2394 if ((diagnostic_t
)kind
!= DK_UNSPECIFIED
)
2395 diagnostic_classify_diagnostic (global_dc
, opt_index
, (diagnostic_t
)kind
,
2400 /* Callback function, called when -Werror= enables a warning. */
2402 static void (*warning_as_error_callback
) (int) = NULL
;
2404 /* Register a callback for enable_warning_as_error calls. */
2407 register_warning_as_error_callback (void (*callback
) (int))
2409 gcc_assert (warning_as_error_callback
== NULL
|| callback
== NULL
);
2410 warning_as_error_callback
= callback
;
2413 /* Enable a warning option as an error. This is used by -Werror= and
2414 also by legacy Werror-implicit-function-declaration. */
2417 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2422 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2423 new_option
[0] = 'W';
2424 strcpy (new_option
+ 1, arg
);
2425 option_index
= find_opt (new_option
, lang_mask
);
2426 if (option_index
== OPT_SPECIAL_unknown
)
2428 error ("-Werror=%s: No option -%s", arg
, new_option
);
2432 const diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2434 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
,
2436 if (kind
== DK_ERROR
)
2438 const struct cl_option
* const option
= cl_options
+ option_index
;
2440 /* -Werror=foo implies -Wfoo. */
2441 if (option
->var_type
== CLVC_BOOLEAN
)
2442 handle_option (option_index
, value
, arg
, lang_mask
, (int)kind
);
2444 if (warning_as_error_callback
)
2445 warning_as_error_callback (option_index
);
2451 /* Return malloced memory for the name of the option OPTION_INDEX
2452 which enabled a diagnostic (context CONTEXT), originally of type
2453 ORIG_DIAG_KIND but possibly converted to DIAG_KIND by options such
2457 option_name (diagnostic_context
*context
, int option_index
,
2458 diagnostic_t orig_diag_kind
, diagnostic_t diag_kind
)
2462 /* A warning classified as an error. */
2463 if ((orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
)
2464 && diag_kind
== DK_ERROR
)
2465 return concat (cl_options
[OPT_Werror_
].opt_text
,
2466 /* Skip over "-W". */
2467 cl_options
[option_index
].opt_text
+ 2,
2469 /* A warning with option. */
2471 return xstrdup (cl_options
[option_index
].opt_text
);
2473 /* A warning without option classified as an error. */
2474 else if (orig_diag_kind
== DK_WARNING
|| orig_diag_kind
== DK_PEDWARN
2475 || diag_kind
== DK_WARNING
)
2477 if (context
->warning_as_error_requested
)
2478 return xstrdup (cl_options
[OPT_Werror
].opt_text
);
2480 return xstrdup (_("enabled by default"));