1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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 "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
40 #include "insn-attr.h" /* For INSN_SCHEDULING. */
42 #include "tree-pass.h"
47 /* Value of the -G xx switch, and whether it was passed or not. */
48 unsigned HOST_WIDE_INT g_switch_value
;
51 /* Same for selective scheduling. */
52 bool sel_sched_switch_set
;
54 /* True if we should exit after parsing options. */
55 bool exit_after_options
;
57 /* Print various extra warnings. -W/-Wextra. */
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 #ifdef ENABLE_CHECKING
343 static const char undocumented_msg
[] = N_("This switch lacks documentation");
345 static const char undocumented_msg
[] = "";
348 /* Used for bookkeeping on whether user set these flags so
349 -fprofile-use/-fprofile-generate does not use them. */
350 static bool profile_arc_flag_set
, flag_profile_values_set
;
351 static bool flag_unroll_loops_set
, flag_tracer_set
;
352 static bool flag_value_profile_transformations_set
;
353 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
354 static bool flag_inline_functions_set
, flag_ipa_cp_set
, flag_ipa_cp_clone_set
;
355 static bool flag_predictive_commoning_set
, flag_unswitch_loops_set
, flag_gcse_after_reload_set
;
357 /* Functions excluded from profiling. */
359 typedef char *char_p
; /* For DEF_VEC_P. */
361 DEF_VEC_ALLOC_P(char_p
,heap
);
363 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
364 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
366 typedef const char *const_char_p
; /* For DEF_VEC_P. */
367 DEF_VEC_P(const_char_p
);
368 DEF_VEC_ALLOC_P(const_char_p
,heap
);
370 static VEC(const_char_p
,heap
) *ignored_options
;
372 /* Input file names. */
373 const char **in_fnames
;
374 unsigned num_in_fnames
;
376 static int common_handle_option (size_t scode
, const char *arg
, int value
,
377 unsigned int lang_mask
);
378 static void handle_param (const char *);
379 static void set_Wextra (int);
380 static unsigned int handle_option (const char **argv
, unsigned int lang_mask
);
381 static char *write_langs (unsigned int lang_mask
);
382 static void complain_wrong_lang (const char *, const struct cl_option
*,
383 unsigned int lang_mask
);
384 static void handle_options (unsigned int, const char **, unsigned int);
385 static void set_debug_level (enum debug_info_type type
, int extended
,
388 /* If ARG is a non-negative integer made up solely of digits, return its
389 value, otherwise return -1. */
391 integral_argument (const char *arg
)
395 while (*p
&& ISDIGIT (*p
))
404 /* Return a malloced slash-separated list of languages in MASK. */
406 write_langs (unsigned int mask
)
408 unsigned int n
= 0, len
= 0;
409 const char *lang_name
;
412 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
413 if (mask
& (1U << n
))
414 len
+= strlen (lang_name
) + 1;
416 result
= XNEWVEC (char, len
);
418 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
419 if (mask
& (1U << n
))
423 strcpy (result
+ len
, lang_name
);
424 len
+= strlen (lang_name
);
432 /* Complain that switch OPT_INDEX does not apply to this front end. */
434 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
435 unsigned int lang_mask
)
437 char *ok_langs
, *bad_lang
;
439 ok_langs
= write_langs (option
->flags
);
440 bad_lang
= write_langs (lang_mask
);
442 /* Eventually this should become a hard error IMO. */
443 warning (0, "command line option \"%s\" is valid for %s but not for %s",
444 text
, ok_langs
, bad_lang
);
450 /* Buffer the unknown option described by the string OPT. Currently,
451 we only complain about unknown -Wno-* options if they may have
452 prevented a diagnostic. Otherwise, we just ignore them.
453 Note that if we do complain, it is only as a warning, not an error;
454 passing the compiler an unrecognised -Wno-* option should never
455 change whether the compilation succeeds or fails. */
457 static void postpone_unknown_option_warning(const char *opt
)
459 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
462 /* Produce a warning for each option previously buffered. */
464 void print_ignored_options (void)
466 location_t saved_loc
= input_location
;
470 while (!VEC_empty (const_char_p
, ignored_options
))
473 opt
= VEC_pop (const_char_p
, ignored_options
);
474 warning (0, "unrecognized command line option \"%s\"", opt
);
477 input_location
= saved_loc
;
480 /* Handle the switch beginning at ARGV for the language indicated by
481 LANG_MASK. Returns the number of switches consumed. */
483 handle_option (const char **argv
, unsigned int lang_mask
)
486 const char *opt
, *arg
= 0;
489 unsigned int result
= 0;
490 const struct cl_option
*option
;
494 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
495 if (opt_index
== cl_options_count
496 && (opt
[1] == 'W' || opt
[1] == 'f' || opt
[1] == 'm')
497 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
499 /* Drop the "no-" from negative switches. */
500 size_t len
= strlen (opt
) - 3;
502 dup
= XNEWVEC (char, len
+ 1);
505 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
508 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
509 if (opt_index
== cl_options_count
&& opt
[1] == 'W')
511 /* We don't generate warnings for unknown -Wno-* options
512 unless we issue diagnostics. */
513 postpone_unknown_option_warning (argv
[0]);
519 if (opt_index
== cl_options_count
)
522 option
= &cl_options
[opt_index
];
524 /* Reject negative form of switches that don't take negatives as
526 if (!value
&& (option
->flags
& CL_REJECT_NEGATIVE
))
529 /* We've recognized this switch. */
532 /* Check to see if the option is disabled for this configuration. */
533 if (option
->flags
& CL_DISABLED
)
535 error ("command line option %qs"
536 " is not supported by this configuration", opt
);
540 /* Sort out any argument the switch takes. */
541 if (option
->flags
& CL_JOINED
)
543 /* Have arg point to the original switch. This is because
544 some code, such as disable_builtin_function, expects its
545 argument to be persistent until the program exits. */
546 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
548 arg
+= strlen ("no-");
550 if (*arg
== '\0' && !(option
->flags
& CL_MISSING_OK
))
552 if (option
->flags
& CL_SEPARATE
)
558 /* Missing argument. */
562 else if (option
->flags
& CL_SEPARATE
)
568 /* Now we've swallowed any potential argument, complain if this
569 is a switch for a different front end. */
570 if (!(option
->flags
& (lang_mask
| CL_COMMON
| CL_TARGET
)))
572 complain_wrong_lang (argv
[0], option
, lang_mask
);
575 else if ((option
->flags
& CL_TARGET
)
576 && (option
->flags
& CL_LANG_ALL
)
577 && !(option
->flags
& lang_mask
))
579 /* Complain for target flag language mismatches if any languages
581 complain_wrong_lang (argv
[0], option
, lang_mask
);
585 if (arg
== NULL
&& (option
->flags
& (CL_JOINED
| CL_SEPARATE
)))
587 if (!lang_hooks
.missing_argument (opt
, opt_index
))
588 error ("missing argument to \"%s\"", opt
);
592 /* If the switch takes an integer, convert it. */
593 if (arg
&& (option
->flags
& CL_UINTEGER
))
595 value
= integral_argument (arg
);
598 error ("argument to \"%s\" should be a non-negative integer",
604 if (option
->flag_var
)
605 switch (option
->var_type
)
608 *(int *) option
->flag_var
= value
;
612 *(int *) option
->flag_var
= (value
614 : !option
->var_value
);
619 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
620 *(int *) option
->flag_var
|= option
->var_value
;
622 *(int *) option
->flag_var
&= ~option
->var_value
;
623 if (option
->flag_var
== &target_flags
)
624 target_flags_explicit
|= option
->var_value
;
628 *(const char **) option
->flag_var
= arg
;
632 if (option
->flags
& lang_mask
)
633 if (lang_hooks
.handle_option (opt_index
, arg
, value
) == 0)
636 if (result
&& (option
->flags
& CL_COMMON
))
637 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
640 if (result
&& (option
->flags
& CL_TARGET
))
641 if (!targetm
.handle_option (opt_index
, arg
, value
))
650 /* Handle FILENAME from the command line. */
652 add_input_filename (const char *filename
)
655 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
656 in_fnames
[num_in_fnames
- 1] = filename
;
659 /* Add comma-separated strings to a char_p vector. */
662 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
669 /* We never free this string. */
682 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
685 if (*r
== '\\' && r
[1] == ',')
693 if (*token_start
!= '\0')
694 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
697 /* Return whether we should exclude FNDECL from instrumentation. */
700 flag_instrument_functions_exclude_p (tree fndecl
)
702 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
708 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
710 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
714 if (strstr (name
, s
) != NULL
)
719 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
725 name
= DECL_SOURCE_FILE (fndecl
);
727 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
730 if (strstr (name
, s
) != NULL
)
739 /* Decode and handle the vector of command line options. LANG_MASK
740 contains has a single bit set representing the current
743 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
747 for (i
= 1; i
< argc
; i
+= n
)
749 const char *opt
= argv
[i
];
751 /* Interpret "-" or a non-switch as a file name. */
752 if (opt
[0] != '-' || opt
[1] == '\0')
754 if (main_input_filename
== NULL
)
756 main_input_filename
= opt
;
757 main_input_baselength
758 = base_of_path (main_input_filename
, &main_input_basename
);
760 add_input_filename (opt
);
765 n
= handle_option (argv
+ i
, lang_mask
);
770 error ("unrecognized command line option \"%s\"", opt
);
775 /* Parse command line options and set default flag values. Do minimal
776 options processing. */
778 decode_options (unsigned int argc
, const char **argv
)
780 static bool first_time_p
= true;
781 static int initial_min_crossjump_insns
;
782 static int initial_max_fields_for_field_sensitive
;
783 static int initial_loop_invariant_max_bbs_in_loop
;
784 static unsigned int initial_lang_mask
;
786 unsigned int i
, lang_mask
;
794 /* Perform language-specific options initialization. */
795 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
797 lang_hooks
.initialize_diagnostics (global_dc
);
799 /* Save initial values of parameters we reset. */
800 initial_min_crossjump_insns
801 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
802 initial_max_fields_for_field_sensitive
803 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
804 initial_loop_invariant_max_bbs_in_loop
805 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
808 lang_mask
= initial_lang_mask
;
810 /* Scan to see what optimization level has been specified. That will
811 determine the default value of many flags. */
812 for (i
= 1; i
< argc
; i
++)
814 if (!strcmp (argv
[i
], "-O"))
819 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
821 /* Handle -Os, -O2, -O3, -O69, ... */
822 const char *p
= &argv
[i
][2];
824 if ((p
[0] == 's') && (p
[1] == 0))
828 /* Optimizing for size forces optimize to be 2. */
833 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
834 if (optimize_val
!= -1)
836 optimize
= optimize_val
;
843 /* Use priority coloring if cover classes is not defined for the
845 if (targetm
.ira_cover_classes
== NULL
)
846 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
848 /* -O1 optimizations. */
849 opt1
= (optimize
>= 1);
850 flag_defer_pop
= opt1
;
852 flag_delayed_branch
= opt1
;
854 #ifdef CAN_DEBUG_WITHOUT_FP
855 flag_omit_frame_pointer
= opt1
;
857 flag_guess_branch_prob
= opt1
;
858 flag_cprop_registers
= opt1
;
859 flag_if_conversion
= opt1
;
860 flag_if_conversion2
= opt1
;
861 flag_ipa_pure_const
= opt1
;
862 flag_ipa_reference
= opt1
;
863 flag_merge_constants
= opt1
;
864 flag_split_wide_types
= opt1
;
865 flag_tree_ccp
= opt1
;
866 flag_tree_dce
= opt1
;
867 flag_tree_dom
= opt1
;
868 flag_tree_dse
= opt1
;
869 flag_tree_ter
= opt1
;
870 flag_tree_sra
= opt1
;
871 flag_tree_copyrename
= opt1
;
872 flag_tree_fre
= opt1
;
873 flag_tree_copy_prop
= opt1
;
874 flag_tree_sink
= opt1
;
877 /* -O2 optimizations. */
878 opt2
= (optimize
>= 2);
879 flag_inline_small_functions
= opt2
;
880 flag_indirect_inlining
= opt2
;
881 flag_thread_jumps
= opt2
;
882 flag_crossjumping
= opt2
;
883 flag_optimize_sibling_calls
= opt2
;
884 flag_forward_propagate
= opt2
;
885 flag_cse_follow_jumps
= opt2
;
887 flag_expensive_optimizations
= opt2
;
888 flag_rerun_cse_after_loop
= opt2
;
889 flag_caller_saves
= opt2
;
890 flag_peephole2
= opt2
;
891 #ifdef INSN_SCHEDULING
892 flag_schedule_insns
= opt2
;
893 flag_schedule_insns_after_reload
= opt2
;
896 flag_strict_aliasing
= opt2
;
897 flag_strict_overflow
= opt2
;
898 flag_reorder_blocks
= opt2
;
899 flag_reorder_functions
= opt2
;
900 flag_tree_vrp
= opt2
;
901 flag_tree_builtin_call_dce
= opt2
;
902 flag_tree_pre
= opt2
;
903 flag_tree_switch_conversion
= 1;
906 /* Track fields in field-sensitive alias analysis. */
907 set_param_value ("max-fields-for-field-sensitive",
908 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
910 /* For -O1 only do loop invariant motion for very small loops. */
911 set_param_value ("loop-invariant-max-bbs-in-loop",
912 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
914 /* -O3 optimizations. */
915 opt3
= (optimize
>= 3);
916 flag_predictive_commoning
= opt3
;
917 flag_inline_functions
= opt3
;
918 flag_unswitch_loops
= opt3
;
919 flag_gcse_after_reload
= opt3
;
920 flag_tree_vectorize
= opt3
;
921 flag_ipa_cp_clone
= opt3
;
922 if (flag_ipa_cp_clone
)
925 /* Just -O1/-O0 optimizations. */
926 opt1_max
= (optimize
<= 1);
927 align_loops
= opt1_max
;
928 align_jumps
= opt1_max
;
929 align_labels
= opt1_max
;
930 align_functions
= opt1_max
;
934 /* Inlining of functions reducing size is a good idea regardless of them
935 being declared inline. */
936 flag_inline_functions
= 1;
938 /* Basic optimization options. */
943 /* We want to crossjump as much as possible. */
944 set_param_value ("min-crossjump-insns", 1);
947 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
951 /* Initialize whether `char' is signed. */
952 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
953 /* Set this to a special "uninitialized" value. The actual default is
954 set after target options have been processed. */
955 flag_short_enums
= 2;
957 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
959 target_flags
= targetm
.default_target_flags
;
961 /* Some targets have ABI-specified unwind tables. */
962 flag_unwind_tables
= targetm
.unwind_tables_default
;
965 #ifdef OPTIMIZATION_OPTIONS
966 /* Allow default optimizations to be specified on a per-machine basis. */
967 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
970 handle_options (argc
, argv
, lang_mask
);
972 /* Handle related options for unit-at-a-time, toplevel-reorder, and
974 if (!flag_unit_at_a_time
)
976 if (flag_section_anchors
== 1)
977 error ("Section anchors must be disabled when unit-at-a-time "
979 flag_section_anchors
= 0;
980 if (flag_toplevel_reorder
== 1)
981 error ("Toplevel reorder must be disabled when unit-at-a-time "
983 flag_toplevel_reorder
= 0;
985 /* Unless the user has asked for section anchors, we disable toplevel
986 reordering at -O0 to disable transformations that might be surprising
987 to end users and to get -fno-toplevel-reorder tested. */
988 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
990 flag_toplevel_reorder
= 0;
991 flag_section_anchors
= 0;
993 if (!flag_toplevel_reorder
)
995 if (flag_section_anchors
== 1)
996 error ("section anchors must be disabled when toplevel reorder"
998 flag_section_anchors
= 0;
1004 flag_pic
= flag_pie
;
1005 if (flag_pic
&& !flag_pie
)
1011 /* Inlining does not work if not optimizing,
1012 so force it not to be done. */
1017 /* The optimization to partition hot and cold basic blocks into separate
1018 sections of the .o and executable files does not work (currently)
1019 with exception handling. This is because there is no support for
1020 generating unwind info. If flag_exceptions is turned on we need to
1021 turn off the partitioning optimization. */
1023 if (flag_exceptions
&& flag_reorder_blocks_and_partition
)
1025 inform (input_location
,
1026 "-freorder-blocks-and-partition does not work with exceptions");
1027 flag_reorder_blocks_and_partition
= 0;
1028 flag_reorder_blocks
= 1;
1031 /* If user requested unwind info, then turn off the partitioning
1034 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1035 && flag_reorder_blocks_and_partition
)
1037 inform (input_location
, "-freorder-blocks-and-partition does not support unwind info");
1038 flag_reorder_blocks_and_partition
= 0;
1039 flag_reorder_blocks
= 1;
1042 /* If the target requested unwind info, then turn off the partitioning
1043 optimization with a different message. Likewise, if the target does not
1044 support named sections. */
1046 if (flag_reorder_blocks_and_partition
1047 && (!targetm
.have_named_sections
1048 || (flag_unwind_tables
&& targetm
.unwind_tables_default
)))
1050 inform (input_location
,
1051 "-freorder-blocks-and-partition does not work on this architecture");
1052 flag_reorder_blocks_and_partition
= 0;
1053 flag_reorder_blocks
= 1;
1056 /* Pipelining of outer loops is only possible when general pipelining
1057 capabilities are requested. */
1058 if (!flag_sel_sched_pipelining
)
1059 flag_sel_sched_pipelining_outer_loops
= 0;
1061 if (!targetm
.ira_cover_classes
1062 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1064 inform (input_location
,
1065 "-fira-algorithm=CB does not work on this architecture");
1066 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1069 /* Save the current optimization options if this is the first call. */
1072 optimization_default_node
= build_optimization_node ();
1073 optimization_current_node
= optimization_default_node
;
1074 first_time_p
= false;
1076 if (flag_conserve_stack
)
1078 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1079 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1080 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1081 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1086 #define LEFT_COLUMN 27
1088 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1089 followed by word-wrapped HELP in a second column. */
1091 wrap_help (const char *help
,
1093 unsigned int item_width
,
1094 unsigned int columns
)
1096 unsigned int col_width
= LEFT_COLUMN
;
1097 unsigned int remaining
, room
, len
;
1099 remaining
= strlen (help
);
1103 room
= columns
- 3 - MAX (col_width
, item_width
);
1112 for (i
= 0; help
[i
]; i
++)
1114 if (i
>= room
&& len
!= remaining
)
1118 else if ((help
[i
] == '-' || help
[i
] == '/')
1119 && help
[i
+ 1] != ' '
1120 && i
> 0 && ISALPHA (help
[i
- 1]))
1125 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1127 while (help
[len
] == ' ')
1135 /* Print help for a specific front-end, etc. */
1137 print_filtered_help (unsigned int include_flags
,
1138 unsigned int exclude_flags
,
1139 unsigned int any_flags
,
1140 unsigned int columns
)
1144 static char *printed
= NULL
;
1146 bool displayed
= false;
1148 if (include_flags
== CL_PARAMS
)
1150 for (i
= 0; i
< LAST_PARAM
; i
++)
1152 const char *param
= compiler_params
[i
].option
;
1154 help
= compiler_params
[i
].help
;
1155 if (help
== NULL
|| *help
== '\0')
1157 if (exclude_flags
& CL_UNDOCUMENTED
)
1159 help
= undocumented_msg
;
1162 /* Get the translation. */
1165 wrap_help (help
, param
, strlen (param
), columns
);
1172 printed
= XCNEWVAR (char, cl_options_count
);
1174 for (i
= 0; i
< cl_options_count
; i
++)
1176 static char new_help
[128];
1177 const struct cl_option
*option
= cl_options
+ i
;
1182 if (include_flags
== 0
1183 || ((option
->flags
& include_flags
) != include_flags
))
1185 if ((option
->flags
& any_flags
) == 0)
1189 /* Skip unwanted switches. */
1190 if ((option
->flags
& exclude_flags
) != 0)
1194 /* Skip switches that have already been printed. */
1200 help
= option
->help
;
1203 if (exclude_flags
& CL_UNDOCUMENTED
)
1205 help
= undocumented_msg
;
1208 /* Get the translation. */
1211 /* Find the gap between the name of the
1212 option and its descriptive text. */
1213 tab
= strchr (help
, '\t');
1222 opt
= option
->opt_text
;
1226 /* With the -Q option enabled we change the descriptive text associated
1227 with an option to be an indication of its current setting. */
1230 if (len
< (LEFT_COLUMN
+ 2))
1231 strcpy (new_help
, "\t\t");
1233 strcpy (new_help
, "\t");
1235 if (option
->flag_var
!= NULL
)
1237 if (option
->flags
& CL_JOINED
)
1239 if (option
->var_type
== CLVC_STRING
)
1241 if (* (const char **) option
->flag_var
!= NULL
)
1242 snprintf (new_help
+ strlen (new_help
),
1243 sizeof (new_help
) - strlen (new_help
),
1244 * (const char **) option
->flag_var
);
1247 sprintf (new_help
+ strlen (new_help
),
1248 "%#x", * (int *) option
->flag_var
);
1251 strcat (new_help
, option_enabled (i
)
1252 ? _("[enabled]") : _("[disabled]"));
1258 wrap_help (help
, opt
, len
, columns
);
1264 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1267 printf (_(" No options with the desired characteristics were found\n"));
1272 /* PR 31349: Tell the user how to see all of the
1273 options supported by a specific front end. */
1274 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1275 if ((1U << i
) & langs
)
1276 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1277 lang_names
[i
], lang_names
[i
]);
1281 else if (! displayed
)
1282 printf (_(" All options with the desired characteristics have already been displayed\n"));
1287 /* Display help for a specified type of option.
1288 The options must have ALL of the INCLUDE_FLAGS set
1289 ANY of the flags in the ANY_FLAGS set
1290 and NONE of the EXCLUDE_FLAGS set. */
1292 print_specific_help (unsigned int include_flags
,
1293 unsigned int exclude_flags
,
1294 unsigned int any_flags
)
1296 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1297 const char * description
= NULL
;
1298 const char * descrip_extra
= "";
1301 static unsigned int columns
= 0;
1303 /* Sanity check: Make sure that we do not have more
1304 languages than we have bits available to enumerate them. */
1305 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1307 /* If we have not done so already, obtain
1308 the desired maximum width of the output. */
1313 GET_ENVIRONMENT (p
, "COLUMNS");
1316 int value
= atoi (p
);
1323 /* Use a reasonable default. */
1327 /* Decide upon the title for the options that we are going to display. */
1328 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1330 switch (flag
& include_flags
)
1336 description
= _("The following options are target specific");
1339 description
= _("The following options control compiler warning messages");
1341 case CL_OPTIMIZATION
:
1342 description
= _("The following options control optimizations");
1345 description
= _("The following options are language-independent");
1348 description
= _("The --param option recognizes the following as parameters");
1351 if (i
>= cl_lang_count
)
1353 if (exclude_flags
& all_langs_mask
)
1354 description
= _("The following options are specific to just the language ");
1356 description
= _("The following options are supported by the language ");
1357 descrip_extra
= lang_names
[i
];
1362 if (description
== NULL
)
1366 if (include_flags
& CL_UNDOCUMENTED
)
1367 description
= _("The following options are not documented");
1368 else if (include_flags
& CL_SEPARATE
)
1369 description
= _("The following options take separate arguments");
1370 else if (include_flags
& CL_JOINED
)
1371 description
= _("The following options take joined arguments");
1374 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1381 if (any_flags
& all_langs_mask
)
1382 description
= _("The following options are language-related");
1384 description
= _("The following options are language-independent");
1388 printf ("%s%s:\n", description
, descrip_extra
);
1389 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1392 /* Handle target- and language-independent options. Return zero to
1393 generate an "unknown option" message. Only options that need
1394 extra handling need to be listed here; if you simply want
1395 VALUE assigned to a variable, it happens automatically. */
1398 common_handle_option (size_t scode
, const char *arg
, int value
,
1399 unsigned int lang_mask
)
1401 static bool verbose
= false;
1402 enum opt_code code
= (enum opt_code
) scode
;
1417 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1418 unsigned int undoc_mask
;
1421 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1422 /* First display any single language specific options. */
1423 for (i
= 0; i
< cl_lang_count
; i
++)
1425 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1426 /* Next display any multi language specific options. */
1427 print_specific_help (0, undoc_mask
, all_langs_mask
);
1428 /* Then display any remaining, non-language options. */
1429 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1430 print_specific_help (i
, undoc_mask
, 0);
1431 exit_after_options
= true;
1435 case OPT_ftarget_help
:
1436 case OPT__target_help
:
1437 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1438 exit_after_options
= true;
1440 /* Allow the target a chance to give the user some additional information. */
1441 if (targetm
.target_help
)
1442 targetm
.target_help ();
1448 const char * a
= arg
;
1449 unsigned int include_flags
= 0;
1450 /* Note - by default we include undocumented options when listing
1451 specific classes. If you only want to see documented options
1452 then add ",^undocumented" to the --help= option. E.g.:
1454 --help=target,^undocumented */
1455 unsigned int exclude_flags
= 0;
1457 /* Walk along the argument string, parsing each word in turn.
1459 arg = [^]{word}[,{arg}]
1460 word = {optimizers|target|warnings|undocumented|
1461 params|common|<language>} */
1466 const char * string
;
1471 { "optimizers", CL_OPTIMIZATION
},
1472 { "target", CL_TARGET
},
1473 { "warnings", CL_WARNING
},
1474 { "undocumented", CL_UNDOCUMENTED
},
1475 { "params", CL_PARAMS
},
1476 { "joined", CL_JOINED
},
1477 { "separate", CL_SEPARATE
},
1478 { "common", CL_COMMON
},
1481 unsigned int * pflags
;
1483 unsigned int lang_flag
, specific_flag
;
1490 pflags
= & exclude_flags
;
1493 pflags
= & include_flags
;
1495 comma
= strchr (a
, ',');
1506 /* Check to see if the string matches an option class name. */
1507 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1508 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1510 specific_flag
= specifics
[i
].flag
;
1514 /* Check to see if the string matches a language name.
1515 Note - we rely upon the alpha-sorted nature of the entries in
1516 the lang_names array, specifically that shorter names appear
1517 before their longer variants. (i.e. C before C++). That way
1518 when we are attempting to match --help=c for example we will
1519 match with C first and not C++. */
1520 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1521 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1523 lang_flag
= 1U << i
;
1527 if (specific_flag
!= 0)
1530 * pflags
|= specific_flag
;
1533 /* The option's argument matches both the start of a
1534 language name and the start of an option class name.
1535 We have a special case for when the user has
1536 specified "--help=c", but otherwise we have to issue
1538 if (strncasecmp (a
, "c", len
) == 0)
1539 * pflags
|= lang_flag
;
1542 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1546 else if (lang_flag
!= 0)
1547 * pflags
|= lang_flag
;
1550 "warning: unrecognized argument to --help= option: %.*s\n",
1559 print_specific_help (include_flags
, exclude_flags
, 0);
1560 exit_after_options
= true;
1565 print_version (stderr
, "");
1566 exit_after_options
= true;
1570 g_switch_value
= value
;
1571 g_switch_set
= true;
1576 /* Currently handled in a prescan. */
1580 /* For backward compatibility, -W is the same as -Wextra. */
1585 enable_warning_as_error (arg
, value
, lang_mask
);
1592 case OPT_Wlarger_than_
:
1593 /* This form corresponds to -Wlarger-than-.
1594 Kept for backward compatibility.
1595 Don't use it as the first argument of warning(). */
1597 case OPT_Wlarger_than_eq
:
1598 larger_than_size
= value
;
1599 warn_larger_than
= value
!= -1;
1602 case OPT_Wframe_larger_than_
:
1603 frame_larger_than_size
= value
;
1604 warn_frame_larger_than
= value
!= -1;
1607 case OPT_Wstrict_aliasing
:
1608 set_Wstrict_aliasing (value
);
1611 case OPT_Wstrict_aliasing_
:
1612 warn_strict_aliasing
= value
;
1615 case OPT_Wstrict_overflow
:
1616 warn_strict_overflow
= (value
1617 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1621 case OPT_Wstrict_overflow_
:
1622 warn_strict_overflow
= value
;
1626 warn_unused
= value
;
1631 aux_info_file_name
= arg
;
1632 flag_gen_aux_info
= 1;
1636 aux_base_name
= arg
;
1639 case OPT_auxbase_strip
:
1641 char *tmp
= xstrdup (arg
);
1642 strip_off_ending (tmp
, strlen (tmp
));
1644 aux_base_name
= tmp
;
1649 decode_d_option (arg
);
1653 dump_base_name
= arg
;
1656 case OPT_falign_functions_
:
1657 align_functions
= value
;
1660 case OPT_falign_jumps_
:
1661 align_jumps
= value
;
1664 case OPT_falign_labels_
:
1665 align_labels
= value
;
1668 case OPT_falign_loops_
:
1669 align_loops
= value
;
1672 case OPT_fbranch_probabilities
:
1673 flag_branch_probabilities_set
= true;
1676 case OPT_fcall_used_
:
1677 fix_register (arg
, 0, 1);
1680 case OPT_fcall_saved_
:
1681 fix_register (arg
, 0, 0);
1685 dbg_cnt_process_opt (arg
);
1688 case OPT_fdbg_cnt_list
:
1689 dbg_cnt_list_all_counters ();
1692 case OPT_fdebug_prefix_map_
:
1693 add_debug_prefix_map (arg
);
1696 case OPT_fdiagnostics_show_location_
:
1697 if (!strcmp (arg
, "once"))
1698 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1699 else if (!strcmp (arg
, "every-line"))
1700 diagnostic_prefixing_rule (global_dc
)
1701 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1706 case OPT_fdiagnostics_show_option
:
1707 global_dc
->show_option_requested
= true;
1711 if (!dump_switch_p (arg
))
1715 case OPT_fexcess_precision_
:
1716 if (!strcmp (arg
, "fast"))
1717 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1718 else if (!strcmp (arg
, "standard"))
1719 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1721 error ("unknown excess precision style \"%s\"", arg
);
1724 case OPT_ffast_math
:
1725 set_fast_math_flags (value
);
1728 case OPT_funsafe_math_optimizations
:
1729 set_unsafe_math_optimizations_flags (value
);
1733 fix_register (arg
, 1, 1);
1736 case OPT_finline_limit_
:
1737 case OPT_finline_limit_eq
:
1738 set_param_value ("max-inline-insns-single", value
/ 2);
1739 set_param_value ("max-inline-insns-auto", value
/ 2);
1742 case OPT_finstrument_functions_exclude_function_list_
:
1743 add_comma_separated_to_vector
1744 (&flag_instrument_functions_exclude_functions
, arg
);
1747 case OPT_finstrument_functions_exclude_file_list_
:
1748 add_comma_separated_to_vector
1749 (&flag_instrument_functions_exclude_files
, arg
);
1752 case OPT_fmessage_length_
:
1753 pp_set_line_maximum_length (global_dc
->printer
, value
);
1756 case OPT_fpack_struct_
:
1757 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1758 error ("structure alignment must be a small power of two, not %d", value
);
1761 initial_max_fld_align
= value
;
1762 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1766 case OPT_fpeel_loops
:
1767 flag_peel_loops_set
= true;
1771 #ifdef ENABLE_PLUGIN
1772 add_new_plugin (arg
);
1774 error ("Plugin support is disabled. Configure with --enable-plugin.");
1778 case OPT_fplugin_arg_
:
1779 #ifdef ENABLE_PLUGIN
1780 parse_plugin_arg_opt (arg
);
1782 error ("Plugin support is disabled. Configure with --enable-plugin.");
1786 case OPT_fprofile_arcs
:
1787 profile_arc_flag_set
= true;
1790 case OPT_finline_functions
:
1791 flag_inline_functions_set
= true;
1794 case OPT_fprofile_dir_
:
1795 profile_data_prefix
= xstrdup (arg
);
1798 case OPT_fprofile_use_
:
1799 profile_data_prefix
= xstrdup (arg
);
1800 flag_profile_use
= true;
1802 /* No break here - do -fprofile-use processing. */
1803 case OPT_fprofile_use
:
1804 if (!flag_branch_probabilities_set
)
1805 flag_branch_probabilities
= value
;
1806 if (!flag_profile_values_set
)
1807 flag_profile_values
= value
;
1808 if (!flag_unroll_loops_set
)
1809 flag_unroll_loops
= value
;
1810 if (!flag_peel_loops_set
)
1811 flag_peel_loops
= value
;
1812 if (!flag_tracer_set
)
1813 flag_tracer
= value
;
1814 if (!flag_value_profile_transformations_set
)
1815 flag_value_profile_transformations
= value
;
1816 if (!flag_inline_functions_set
)
1817 flag_inline_functions
= value
;
1818 if (!flag_ipa_cp_set
)
1819 flag_ipa_cp
= value
;
1820 if (!flag_ipa_cp_clone_set
1821 && value
&& flag_ipa_cp
)
1822 flag_ipa_cp_clone
= value
;
1823 if (!flag_predictive_commoning_set
)
1824 flag_predictive_commoning
= value
;
1825 if (!flag_unswitch_loops_set
)
1826 flag_unswitch_loops
= value
;
1827 if (!flag_gcse_after_reload_set
)
1828 flag_gcse_after_reload
= value
;
1831 case OPT_fprofile_generate_
:
1832 profile_data_prefix
= xstrdup (arg
);
1834 /* No break here - do -fprofile-generate processing. */
1835 case OPT_fprofile_generate
:
1836 if (!profile_arc_flag_set
)
1837 profile_arc_flag
= value
;
1838 if (!flag_profile_values_set
)
1839 flag_profile_values
= value
;
1840 if (!flag_value_profile_transformations_set
)
1841 flag_value_profile_transformations
= value
;
1842 if (!flag_inline_functions_set
)
1843 flag_inline_functions
= value
;
1846 case OPT_fprofile_values
:
1847 flag_profile_values_set
= true;
1850 case OPT_fvisibility_
:
1852 if (!strcmp(arg
, "default"))
1853 default_visibility
= VISIBILITY_DEFAULT
;
1854 else if (!strcmp(arg
, "internal"))
1855 default_visibility
= VISIBILITY_INTERNAL
;
1856 else if (!strcmp(arg
, "hidden"))
1857 default_visibility
= VISIBILITY_HIDDEN
;
1858 else if (!strcmp(arg
, "protected"))
1859 default_visibility
= VISIBILITY_PROTECTED
;
1861 error ("unrecognized visibility value \"%s\"", arg
);
1866 flag_value_profile_transformations_set
= true;
1869 case OPT_frandom_seed
:
1870 /* The real switch is -fno-random-seed. */
1873 set_random_seed (NULL
);
1876 case OPT_frandom_seed_
:
1877 set_random_seed (arg
);
1880 case OPT_fselective_scheduling
:
1881 case OPT_fselective_scheduling2
:
1882 sel_sched_switch_set
= true;
1885 case OPT_fsched_verbose_
:
1886 #ifdef INSN_SCHEDULING
1887 fix_sched_param ("verbose", arg
);
1893 case OPT_fsched_stalled_insns_
:
1894 flag_sched_stalled_insns
= value
;
1895 if (flag_sched_stalled_insns
== 0)
1896 flag_sched_stalled_insns
= -1;
1899 case OPT_fsched_stalled_insns_dep_
:
1900 flag_sched_stalled_insns_dep
= value
;
1903 case OPT_fstack_check_
:
1904 if (!strcmp (arg
, "no"))
1905 flag_stack_check
= NO_STACK_CHECK
;
1906 else if (!strcmp (arg
, "generic"))
1907 /* This is the old stack checking method. */
1908 flag_stack_check
= STACK_CHECK_BUILTIN
1909 ? FULL_BUILTIN_STACK_CHECK
1910 : GENERIC_STACK_CHECK
;
1911 else if (!strcmp (arg
, "specific"))
1912 /* This is the new stack checking method. */
1913 flag_stack_check
= STACK_CHECK_BUILTIN
1914 ? FULL_BUILTIN_STACK_CHECK
1915 : STACK_CHECK_STATIC_BUILTIN
1916 ? STATIC_BUILTIN_STACK_CHECK
1917 : GENERIC_STACK_CHECK
;
1919 warning (0, "unknown stack check parameter \"%s\"", arg
);
1922 case OPT_fstack_check
:
1923 /* This is the same as the "specific" mode above. */
1925 flag_stack_check
= STACK_CHECK_BUILTIN
1926 ? FULL_BUILTIN_STACK_CHECK
1927 : STACK_CHECK_STATIC_BUILTIN
1928 ? STATIC_BUILTIN_STACK_CHECK
1929 : GENERIC_STACK_CHECK
;
1931 flag_stack_check
= NO_STACK_CHECK
;
1934 case OPT_fstack_limit
:
1935 /* The real switch is -fno-stack-limit. */
1938 stack_limit_rtx
= NULL_RTX
;
1941 case OPT_fstack_limit_register_
:
1943 int reg
= decode_reg_name (arg
);
1945 error ("unrecognized register name \"%s\"", arg
);
1947 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1951 case OPT_fstack_limit_symbol_
:
1952 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1955 case OPT_ftree_vectorizer_verbose_
:
1956 vect_set_verbosity_level (arg
);
1959 case OPT_ftls_model_
:
1960 if (!strcmp (arg
, "global-dynamic"))
1961 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
1962 else if (!strcmp (arg
, "local-dynamic"))
1963 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
1964 else if (!strcmp (arg
, "initial-exec"))
1965 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
1966 else if (!strcmp (arg
, "local-exec"))
1967 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
1969 warning (0, "unknown tls-model \"%s\"", arg
);
1972 case OPT_fira_algorithm_
:
1973 if (!strcmp (arg
, "CB"))
1974 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
1975 else if (!strcmp (arg
, "priority"))
1976 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1978 warning (0, "unknown ira algorithm \"%s\"", arg
);
1981 case OPT_fira_region_
:
1982 if (!strcmp (arg
, "one"))
1983 flag_ira_region
= IRA_REGION_ONE
;
1984 else if (!strcmp (arg
, "all"))
1985 flag_ira_region
= IRA_REGION_ALL
;
1986 else if (!strcmp (arg
, "mixed"))
1987 flag_ira_region
= IRA_REGION_MIXED
;
1989 warning (0, "unknown ira region \"%s\"", arg
);
1992 case OPT_fira_verbose_
:
1993 flag_ira_verbose
= value
;
1997 flag_tracer_set
= true;
2001 flag_ipa_cp_set
= true;
2004 case OPT_fipa_cp_clone
:
2005 flag_ipa_cp_clone_set
= true;
2008 case OPT_fpredictive_commoning
:
2009 flag_predictive_commoning_set
= true;
2012 case OPT_funswitch_loops
:
2013 flag_unswitch_loops_set
= true;
2016 case OPT_fgcse_after_reload
:
2017 flag_gcse_after_reload_set
= true;
2020 case OPT_funroll_loops
:
2021 flag_unroll_loops_set
= true;
2025 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2029 set_debug_level (SDB_DEBUG
, false, arg
);
2033 set_debug_level (DWARF2_DEBUG
, false, arg
);
2037 set_debug_level (NO_DEBUG
, 2, arg
);
2042 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2046 set_debug_level (VMS_DEBUG
, false, arg
);
2051 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2055 asm_file_name
= arg
;
2058 case OPT_pedantic_errors
:
2059 flag_pedantic_errors
= pedantic
= 1;
2062 case OPT_floop_optimize
:
2063 case OPT_frerun_loop_opt
:
2064 case OPT_fstrength_reduce
:
2065 case OPT_ftree_store_copy_prop
:
2066 case OPT_fforce_addr
:
2067 case OPT_ftree_salias
:
2068 case OPT_ftree_store_ccp
:
2069 /* These are no-ops, preserved for backward compatibility. */
2073 /* If the flag was handled in a standard way, assume the lack of
2074 processing here is intentional. */
2075 gcc_assert (cl_options
[scode
].flag_var
);
2082 /* Handle --param NAME=VALUE. */
2084 handle_param (const char *carg
)
2089 arg
= xstrdup (carg
);
2090 equal
= strchr (arg
, '=');
2092 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2095 value
= integral_argument (equal
+ 1);
2097 error ("invalid --param value %qs", equal
+ 1);
2101 set_param_value (arg
, value
);
2108 /* Handle -W and -Wextra. */
2110 set_Wextra (int setting
)
2112 extra_warnings
= setting
;
2114 /* We save the value of warn_uninitialized, since if they put
2115 -Wuninitialized on the command line, we need to generate a
2116 warning about not using it without also specifying -O. */
2118 warn_uninitialized
= 0;
2119 else if (warn_uninitialized
!= 1)
2120 warn_uninitialized
= 2;
2123 /* Used to set the level of strict aliasing warnings,
2124 when no level is specified (i.e., when -Wstrict-aliasing, and not
2125 -Wstrict-aliasing=level was given).
2126 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2127 and 0 otherwise. After calling this function, wstrict_aliasing will be
2128 set to the default value of -Wstrict_aliasing=level, currently 3. */
2130 set_Wstrict_aliasing (int onoff
)
2132 gcc_assert (onoff
== 0 || onoff
== 1);
2134 warn_strict_aliasing
= 3;
2136 warn_strict_aliasing
= 0;
2139 /* The following routines are useful in setting all the flags that
2140 -ffast-math and -fno-fast-math imply. */
2142 set_fast_math_flags (int set
)
2144 flag_unsafe_math_optimizations
= set
;
2145 set_unsafe_math_optimizations_flags (set
);
2146 flag_finite_math_only
= set
;
2147 flag_errno_math
= !set
;
2150 flag_signaling_nans
= 0;
2151 flag_rounding_math
= 0;
2152 flag_cx_limited_range
= 1;
2156 /* When -funsafe-math-optimizations is set the following
2157 flags are set as well. */
2159 set_unsafe_math_optimizations_flags (int set
)
2161 flag_trapping_math
= !set
;
2162 flag_signed_zeros
= !set
;
2163 flag_associative_math
= set
;
2164 flag_reciprocal_math
= set
;
2167 /* Return true iff flags are set as if -ffast-math. */
2169 fast_math_flags_set_p (void)
2171 return (!flag_trapping_math
2172 && flag_unsafe_math_optimizations
2173 && flag_finite_math_only
2174 && !flag_signed_zeros
2175 && !flag_errno_math
);
2178 /* Return true iff flags are set as if -ffast-math but using the flags stored
2179 in the struct cl_optimization structure. */
2181 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2183 return (!opt
->flag_trapping_math
2184 && opt
->flag_unsafe_math_optimizations
2185 && opt
->flag_finite_math_only
2186 && !opt
->flag_signed_zeros
2187 && !opt
->flag_errno_math
);
2190 /* Handle a debug output -g switch. EXTENDED is true or false to support
2191 extended output (2 is special and means "-ggdb" was given). */
2193 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2195 static bool type_explicit
;
2197 use_gnu_debug_info_extensions
= extended
;
2199 if (type
== NO_DEBUG
)
2201 if (write_symbols
== NO_DEBUG
)
2203 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2207 #ifdef DWARF2_DEBUGGING_INFO
2208 write_symbols
= DWARF2_DEBUG
;
2209 #elif defined DBX_DEBUGGING_INFO
2210 write_symbols
= DBX_DEBUG
;
2214 if (write_symbols
== NO_DEBUG
)
2215 warning (0, "target system does not support debug output");
2220 /* Does it conflict with an already selected type? */
2221 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2222 error ("debug format \"%s\" conflicts with prior selection",
2223 debug_type_names
[type
]);
2224 write_symbols
= type
;
2225 type_explicit
= true;
2228 /* A debug flag without a level defaults to level 2. */
2231 if (!debug_info_level
)
2232 debug_info_level
= 2;
2236 debug_info_level
= integral_argument (arg
);
2237 if (debug_info_level
== (unsigned int) -1)
2238 error ("unrecognised debug output level \"%s\"", arg
);
2239 else if (debug_info_level
> 3)
2240 error ("debug output level %s is too high", arg
);
2244 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2245 a simple on-off switch. */
2248 option_enabled (int opt_idx
)
2250 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2252 if (option
->flag_var
)
2253 switch (option
->var_type
)
2256 return *(int *) option
->flag_var
!= 0;
2259 return *(int *) option
->flag_var
== option
->var_value
;
2261 case CLVC_BIT_CLEAR
:
2262 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2265 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2273 /* Fill STATE with the current state of option OPTION. Return true if
2274 there is some state to store. */
2277 get_option_state (int option
, struct cl_option_state
*state
)
2279 if (cl_options
[option
].flag_var
== 0)
2282 switch (cl_options
[option
].var_type
)
2286 state
->data
= cl_options
[option
].flag_var
;
2287 state
->size
= sizeof (int);
2290 case CLVC_BIT_CLEAR
:
2292 state
->ch
= option_enabled (option
);
2293 state
->data
= &state
->ch
;
2298 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2299 if (state
->data
== 0)
2301 state
->size
= strlen ((const char *) state
->data
) + 1;
2307 /* Enable a warning option as an error. This is used by -Werror= and
2308 also by legacy Werror-implicit-function-declaration. */
2311 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2316 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2317 new_option
[0] = 'W';
2318 strcpy (new_option
+ 1, arg
);
2319 option_index
= find_opt (new_option
, lang_mask
);
2320 if (option_index
== N_OPTS
)
2322 error ("-Werror=%s: No option -%s", arg
, new_option
);
2326 int kind
= value
? DK_ERROR
: DK_WARNING
;
2327 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2329 /* -Werror=foo implies -Wfoo. */
2330 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2331 && cl_options
[option_index
].flag_var
2332 && kind
== DK_ERROR
)
2333 *(int *) cl_options
[option_index
].flag_var
= 1;