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"
48 /* Value of the -G xx switch, and whether it was passed or not. */
49 unsigned HOST_WIDE_INT g_switch_value
;
52 /* Same for selective scheduling. */
53 bool sel_sched_switch_set
;
55 /* True if we should exit after parsing options. */
56 bool exit_after_options
;
58 /* True to warn about any objects definitions whose size is larger
59 than N bytes. Also want about function definitions whose returned
60 values are larger than N bytes, where N is `larger_than_size'. */
61 bool warn_larger_than
;
62 HOST_WIDE_INT larger_than_size
;
64 /* True to warn about any function whose frame size is larger
66 bool warn_frame_larger_than
;
67 HOST_WIDE_INT frame_larger_than_size
;
69 /* Type(s) of debugging information we are producing (if any). See
70 flags.h for the definitions of the different possible types of
71 debugging information. */
72 enum debug_info_type write_symbols
= NO_DEBUG
;
74 /* Level of debugging information we are producing. See flags.h for
75 the definitions of the different possible levels. */
76 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
78 /* A major contribution to object and executable size is debug
79 information size. A major contribution to debug information size
80 is struct descriptions replicated in several object files. The
81 following flags attempt to reduce this information. The basic
82 idea is to not emit struct debugging information in the current
83 compilation unit when that information will be generated by
84 another compilation unit.
86 Debug information for a struct defined in the current source
87 file should be generated in the object file. Likewise the
88 debug information for a struct defined in a header should be
89 generated in the object file of the corresponding source file.
90 Both of these case are handled when the base name of the file of
91 the struct definition matches the base name of the source file
92 of the current compilation unit. This matching emits minimal
93 struct debugging information.
95 The base file name matching rule above will fail to emit debug
96 information for structs defined in system headers. So a second
97 category of files includes system headers in addition to files
100 The remaining types of files are library headers and application
101 headers. We cannot currently distinguish these two types. */
103 enum debug_struct_file
105 DINFO_STRUCT_FILE_NONE
, /* Debug no structs. */
106 DINFO_STRUCT_FILE_BASE
, /* Debug structs defined in files with the
107 same base name as the compilation unit. */
108 DINFO_STRUCT_FILE_SYS
, /* Also debug structs defined in system
110 DINFO_STRUCT_FILE_ANY
/* Debug structs defined in all files. */
113 /* Generic structs (e.g. templates not explicitly specialized)
114 may not have a compilation unit associated with them, and so
115 may need to be treated differently from ordinary structs.
117 Structs only handled by reference (indirectly), will also usually
118 not need as much debugging information. */
120 static enum debug_struct_file debug_struct_ordinary
[DINFO_USAGE_NUM_ENUMS
]
121 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
122 static enum debug_struct_file debug_struct_generic
[DINFO_USAGE_NUM_ENUMS
]
123 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
125 /* Parse the -femit-struct-debug-detailed option value
126 and set the flag variables. */
128 #define MATCH( prefix, string ) \
129 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
130 ? ((string += sizeof prefix - 1), 1) : 0)
133 set_struct_debug_option (const char *spec
)
135 /* various labels for comparison */
136 static char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
137 static char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
138 static char none_lbl
[] = "none", any_lbl
[] = "any";
139 static char base_lbl
[] = "base", sys_lbl
[] = "sys";
141 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
142 /* Default is to apply to as much as possible. */
143 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
144 int ord
= 1, gen
= 1;
147 if (MATCH (dfn_lbl
, spec
))
148 usage
= DINFO_USAGE_DFN
;
149 else if (MATCH (dir_lbl
, spec
))
150 usage
= DINFO_USAGE_DIR_USE
;
151 else if (MATCH (ind_lbl
, spec
))
152 usage
= DINFO_USAGE_IND_USE
;
154 /* Generics or not? */
155 if (MATCH (ord_lbl
, spec
))
157 else if (MATCH (gen_lbl
, spec
))
160 /* What allowable environment? */
161 if (MATCH (none_lbl
, spec
))
162 files
= DINFO_STRUCT_FILE_NONE
;
163 else if (MATCH (any_lbl
, spec
))
164 files
= DINFO_STRUCT_FILE_ANY
;
165 else if (MATCH (sys_lbl
, spec
))
166 files
= DINFO_STRUCT_FILE_SYS
;
167 else if (MATCH (base_lbl
, spec
))
168 files
= DINFO_STRUCT_FILE_BASE
;
170 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
173 /* Effect the specification. */
174 if (usage
== DINFO_USAGE_NUM_ENUMS
)
178 debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
179 debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
180 debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
184 debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
185 debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
186 debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
192 debug_struct_ordinary
[usage
] = files
;
194 debug_struct_generic
[usage
] = files
;
198 set_struct_debug_option (spec
+1);
201 /* No more -femit-struct-debug-detailed specifications.
204 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
206 if (debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
207 < debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
208 || debug_struct_generic
[DINFO_USAGE_DIR_USE
]
209 < debug_struct_generic
[DINFO_USAGE_IND_USE
])
210 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
211 " as much as %<-femit-struct-debug-detailed=ind:...%>");
215 /* Find the base name of a path, stripping off both directories and
216 a single final extension. */
218 base_of_path (const char *path
, const char **base_out
)
220 const char *base
= path
;
222 const char *p
= path
;
226 if (IS_DIR_SEPARATOR(c
))
241 /* Match the base name of a file to the base name of a compilation unit. */
243 static const char *main_input_basename
;
244 static int main_input_baselength
;
247 matches_main_base (const char *path
)
249 /* Cache the last query. */
250 static const char *last_path
= NULL
;
251 static int last_match
= 0;
252 if (path
!= last_path
)
255 int length
= base_of_path (path
, &base
);
257 last_match
= (length
== main_input_baselength
258 && memcmp (base
, main_input_basename
, length
) == 0);
263 #ifdef DEBUG_DEBUG_STRUCT
266 dump_struct_debug (tree type
, enum debug_info_usage usage
,
267 enum debug_struct_file criterion
, int generic
,
268 int matches
, int result
)
270 /* Find the type name. */
271 tree type_decl
= TYPE_STUB_DECL (type
);
273 const char *name
= 0;
274 if (TREE_CODE (t
) == TYPE_DECL
)
277 name
= IDENTIFIER_POINTER (t
);
279 fprintf (stderr
, " struct %d %s %s %s %s %d %p %s\n",
281 DECL_IN_SYSTEM_HEADER (type_decl
) ? "sys" : "usr",
282 matches
? "bas" : "hdr",
283 generic
? "gen" : "ord",
284 usage
== DINFO_USAGE_DFN
? ";" :
285 usage
== DINFO_USAGE_DIR_USE
? "." : "*",
287 (void*) type_decl
, name
);
290 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
291 dump_struct_debug (type, usage, criterion, generic, matches, result)
295 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
302 should_emit_struct_debug (tree type
, enum debug_info_usage usage
)
304 enum debug_struct_file criterion
;
306 bool generic
= lang_hooks
.types
.generic_p (type
);
309 criterion
= debug_struct_generic
[usage
];
311 criterion
= debug_struct_ordinary
[usage
];
313 if (criterion
== DINFO_STRUCT_FILE_NONE
)
314 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
315 if (criterion
== DINFO_STRUCT_FILE_ANY
)
316 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
318 type_decl
= TYPE_STUB_DECL (type
);
320 if (criterion
== DINFO_STRUCT_FILE_SYS
&& DECL_IN_SYSTEM_HEADER (type_decl
))
321 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
323 if (matches_main_base (DECL_SOURCE_FILE (type_decl
)))
324 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, true, true);
325 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
328 /* Nonzero means use GNU-only extensions in the generated symbolic
329 debugging information. Currently, this only has an effect when
330 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
331 bool use_gnu_debug_info_extensions
;
333 /* The default visibility for all symbols (unless overridden) */
334 enum symbol_visibility default_visibility
= VISIBILITY_DEFAULT
;
336 /* Global visibility options. */
337 struct visibility_flags visibility_options
;
339 /* What to print when a switch has no documentation. */
340 static const char undocumented_msg
[] = N_("This switch lacks documentation");
342 /* Used for bookkeeping on whether user set these flags so
343 -fprofile-use/-fprofile-generate does not use them. */
344 static bool profile_arc_flag_set
, flag_profile_values_set
;
345 static bool flag_unroll_loops_set
, flag_tracer_set
;
346 static bool flag_value_profile_transformations_set
;
347 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
348 static bool flag_inline_functions_set
, flag_ipa_cp_set
, flag_ipa_cp_clone_set
;
349 static bool flag_predictive_commoning_set
, flag_unswitch_loops_set
, flag_gcse_after_reload_set
;
351 /* Functions excluded from profiling. */
353 typedef char *char_p
; /* For DEF_VEC_P. */
355 DEF_VEC_ALLOC_P(char_p
,heap
);
357 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
358 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
360 typedef const char *const_char_p
; /* For DEF_VEC_P. */
361 DEF_VEC_P(const_char_p
);
362 DEF_VEC_ALLOC_P(const_char_p
,heap
);
364 static VEC(const_char_p
,heap
) *ignored_options
;
366 /* Language specific warning pass for unused results. */
367 bool flag_warn_unused_result
= false;
369 /* Input file names. */
370 const char **in_fnames
;
371 unsigned num_in_fnames
;
373 static int common_handle_option (size_t scode
, const char *arg
, int value
,
374 unsigned int lang_mask
);
375 static void handle_param (const char *);
376 static unsigned int handle_option (const char **argv
, unsigned int lang_mask
);
377 static char *write_langs (unsigned int lang_mask
);
378 static void complain_wrong_lang (const char *, const struct cl_option
*,
379 unsigned int lang_mask
);
380 static void handle_options (unsigned int, const char **, unsigned int);
381 static void set_debug_level (enum debug_info_type type
, int extended
,
384 /* If ARG is a non-negative integer made up solely of digits, return its
385 value, otherwise return -1. */
387 integral_argument (const char *arg
)
391 while (*p
&& ISDIGIT (*p
))
400 /* Return a malloced slash-separated list of languages in MASK. */
402 write_langs (unsigned int mask
)
404 unsigned int n
= 0, len
= 0;
405 const char *lang_name
;
408 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
409 if (mask
& (1U << n
))
410 len
+= strlen (lang_name
) + 1;
412 result
= XNEWVEC (char, len
);
414 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
415 if (mask
& (1U << n
))
419 strcpy (result
+ len
, lang_name
);
420 len
+= strlen (lang_name
);
428 /* Complain that switch OPT_INDEX does not apply to this front end. */
430 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
431 unsigned int lang_mask
)
433 char *ok_langs
, *bad_lang
;
435 ok_langs
= write_langs (option
->flags
);
436 bad_lang
= write_langs (lang_mask
);
438 /* Eventually this should become a hard error IMO. */
439 warning (0, "command line option \"%s\" is valid for %s but not for %s",
440 text
, ok_langs
, bad_lang
);
446 /* Buffer the unknown option described by the string OPT. Currently,
447 we only complain about unknown -Wno-* options if they may have
448 prevented a diagnostic. Otherwise, we just ignore them.
449 Note that if we do complain, it is only as a warning, not an error;
450 passing the compiler an unrecognised -Wno-* option should never
451 change whether the compilation succeeds or fails. */
453 static void postpone_unknown_option_warning(const char *opt
)
455 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
458 /* Produce a warning for each option previously buffered. */
460 void print_ignored_options (void)
462 location_t saved_loc
= input_location
;
466 while (!VEC_empty (const_char_p
, ignored_options
))
469 opt
= VEC_pop (const_char_p
, ignored_options
);
470 warning (0, "unrecognized command line option \"%s\"", opt
);
473 input_location
= saved_loc
;
476 /* Handle the switch beginning at ARGV for the language indicated by
477 LANG_MASK. Returns the number of switches consumed. */
479 handle_option (const char **argv
, unsigned int lang_mask
)
482 const char *opt
, *arg
= 0;
485 unsigned int result
= 0;
486 const struct cl_option
*option
;
490 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
491 if (opt_index
== cl_options_count
492 && (opt
[1] == 'W' || opt
[1] == 'f' || opt
[1] == 'm')
493 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
495 /* Drop the "no-" from negative switches. */
496 size_t len
= strlen (opt
) - 3;
498 dup
= XNEWVEC (char, len
+ 1);
501 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
504 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
505 if (opt_index
== cl_options_count
&& opt
[1] == 'W')
507 /* We don't generate warnings for unknown -Wno-* options
508 unless we issue diagnostics. */
509 postpone_unknown_option_warning (argv
[0]);
515 if (opt_index
== cl_options_count
)
518 option
= &cl_options
[opt_index
];
520 /* Reject negative form of switches that don't take negatives as
522 if (!value
&& (option
->flags
& CL_REJECT_NEGATIVE
))
525 /* We've recognized this switch. */
528 /* Check to see if the option is disabled for this configuration. */
529 if (option
->flags
& CL_DISABLED
)
531 error ("command line option %qs"
532 " is not supported by this configuration", opt
);
536 /* Sort out any argument the switch takes. */
537 if (option
->flags
& CL_JOINED
)
539 /* Have arg point to the original switch. This is because
540 some code, such as disable_builtin_function, expects its
541 argument to be persistent until the program exits. */
542 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
544 arg
+= strlen ("no-");
546 if (*arg
== '\0' && !(option
->flags
& CL_MISSING_OK
))
548 if (option
->flags
& CL_SEPARATE
)
554 /* Missing argument. */
558 else if (option
->flags
& CL_SEPARATE
)
564 /* Now we've swallowed any potential argument, complain if this
565 is a switch for a different front end. */
566 if (!(option
->flags
& (lang_mask
| CL_COMMON
| CL_TARGET
)))
568 complain_wrong_lang (argv
[0], option
, lang_mask
);
571 else if ((option
->flags
& CL_TARGET
)
572 && (option
->flags
& CL_LANG_ALL
)
573 && !(option
->flags
& lang_mask
))
575 /* Complain for target flag language mismatches if any languages
577 complain_wrong_lang (argv
[0], option
, lang_mask
);
581 if (arg
== NULL
&& (option
->flags
& (CL_JOINED
| CL_SEPARATE
)))
583 if (!lang_hooks
.missing_argument (opt
, opt_index
))
584 error ("missing argument to \"%s\"", opt
);
588 /* If the switch takes an integer, convert it. */
589 if (arg
&& (option
->flags
& CL_UINTEGER
))
591 value
= integral_argument (arg
);
594 error ("argument to \"%s\" should be a non-negative integer",
600 if (option
->flag_var
)
601 switch (option
->var_type
)
604 *(int *) option
->flag_var
= value
;
608 *(int *) option
->flag_var
= (value
610 : !option
->var_value
);
615 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
616 *(int *) option
->flag_var
|= option
->var_value
;
618 *(int *) option
->flag_var
&= ~option
->var_value
;
619 if (option
->flag_var
== &target_flags
)
620 target_flags_explicit
|= option
->var_value
;
624 *(const char **) option
->flag_var
= arg
;
628 if (option
->flags
& lang_mask
)
629 if (lang_hooks
.handle_option (opt_index
, arg
, value
) == 0)
632 if (result
&& (option
->flags
& CL_COMMON
))
633 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
636 if (result
&& (option
->flags
& CL_TARGET
))
637 if (!targetm
.handle_option (opt_index
, arg
, value
))
646 /* Handle FILENAME from the command line. */
648 add_input_filename (const char *filename
)
651 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
652 in_fnames
[num_in_fnames
- 1] = filename
;
655 /* Add comma-separated strings to a char_p vector. */
658 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
665 /* We never free this string. */
678 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
681 if (*r
== '\\' && r
[1] == ',')
689 if (*token_start
!= '\0')
690 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
693 /* Return whether we should exclude FNDECL from instrumentation. */
696 flag_instrument_functions_exclude_p (tree fndecl
)
698 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
704 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
706 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
710 if (strstr (name
, s
) != NULL
)
715 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
721 name
= DECL_SOURCE_FILE (fndecl
);
723 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
726 if (strstr (name
, s
) != NULL
)
735 /* Decode and handle the vector of command line options. LANG_MASK
736 contains has a single bit set representing the current
739 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
743 for (i
= 1; i
< argc
; i
+= n
)
745 const char *opt
= argv
[i
];
747 /* Interpret "-" or a non-switch as a file name. */
748 if (opt
[0] != '-' || opt
[1] == '\0')
750 if (main_input_filename
== NULL
)
752 main_input_filename
= opt
;
753 main_input_baselength
754 = base_of_path (main_input_filename
, &main_input_basename
);
756 add_input_filename (opt
);
761 n
= handle_option (argv
+ i
, lang_mask
);
766 error ("unrecognized command line option \"%s\"", opt
);
771 /* Parse command line options and set default flag values. Do minimal
772 options processing. */
774 decode_options (unsigned int argc
, const char **argv
)
776 static bool first_time_p
= true;
777 static int initial_min_crossjump_insns
;
778 static int initial_max_fields_for_field_sensitive
;
779 static int initial_loop_invariant_max_bbs_in_loop
;
780 static unsigned int initial_lang_mask
;
782 unsigned int i
, lang_mask
;
790 /* Perform language-specific options initialization. */
791 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
793 lang_hooks
.initialize_diagnostics (global_dc
);
795 /* Save initial values of parameters we reset. */
796 initial_min_crossjump_insns
797 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
798 initial_max_fields_for_field_sensitive
799 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
800 initial_loop_invariant_max_bbs_in_loop
801 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
804 lang_mask
= initial_lang_mask
;
806 /* Scan to see what optimization level has been specified. That will
807 determine the default value of many flags. */
808 for (i
= 1; i
< argc
; i
++)
810 if (!strcmp (argv
[i
], "-O"))
815 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
817 /* Handle -Os, -O2, -O3, -O69, ... */
818 const char *p
= &argv
[i
][2];
820 if ((p
[0] == 's') && (p
[1] == 0))
824 /* Optimizing for size forces optimize to be 2. */
829 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
830 if (optimize_val
!= -1)
832 optimize
= optimize_val
;
839 /* Use priority coloring if cover classes is not defined for the
841 if (targetm
.ira_cover_classes
== NULL
)
842 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
844 /* -O1 optimizations. */
845 opt1
= (optimize
>= 1);
846 flag_defer_pop
= opt1
;
848 flag_delayed_branch
= opt1
;
850 #ifdef CAN_DEBUG_WITHOUT_FP
851 flag_omit_frame_pointer
= opt1
;
853 flag_guess_branch_prob
= opt1
;
854 flag_cprop_registers
= opt1
;
855 flag_forward_propagate
= opt1
;
856 flag_if_conversion
= opt1
;
857 flag_if_conversion2
= opt1
;
858 flag_ipa_pure_const
= opt1
;
859 flag_ipa_reference
= opt1
;
860 flag_merge_constants
= opt1
;
861 flag_split_wide_types
= opt1
;
862 flag_tree_ccp
= opt1
;
863 flag_tree_dce
= opt1
;
864 flag_tree_dom
= opt1
;
865 flag_tree_dse
= opt1
;
866 flag_tree_ter
= opt1
;
867 flag_tree_sra
= opt1
;
868 flag_tree_copyrename
= opt1
;
869 flag_tree_fre
= opt1
;
870 flag_tree_copy_prop
= opt1
;
871 flag_tree_sink
= opt1
;
874 /* -O2 optimizations. */
875 opt2
= (optimize
>= 2);
876 flag_inline_small_functions
= opt2
;
877 flag_indirect_inlining
= opt2
;
878 flag_thread_jumps
= opt2
;
879 flag_crossjumping
= opt2
;
880 flag_optimize_sibling_calls
= opt2
;
881 flag_cse_follow_jumps
= opt2
;
883 flag_expensive_optimizations
= opt2
;
884 flag_rerun_cse_after_loop
= opt2
;
885 flag_caller_saves
= opt2
;
886 flag_peephole2
= opt2
;
887 #ifdef INSN_SCHEDULING
888 flag_schedule_insns
= opt2
;
889 flag_schedule_insns_after_reload
= opt2
;
892 flag_strict_aliasing
= opt2
;
893 flag_strict_overflow
= opt2
;
894 flag_reorder_blocks
= opt2
;
895 flag_reorder_functions
= opt2
;
896 flag_tree_vrp
= opt2
;
897 flag_tree_builtin_call_dce
= opt2
;
898 flag_tree_pre
= opt2
;
899 flag_tree_switch_conversion
= 1;
902 /* Track fields in field-sensitive alias analysis. */
903 set_param_value ("max-fields-for-field-sensitive",
904 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
906 /* For -O1 only do loop invariant motion for very small loops. */
907 set_param_value ("loop-invariant-max-bbs-in-loop",
908 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
910 /* -O3 optimizations. */
911 opt3
= (optimize
>= 3);
912 flag_predictive_commoning
= opt3
;
913 flag_inline_functions
= opt3
;
914 flag_unswitch_loops
= opt3
;
915 flag_gcse_after_reload
= opt3
;
916 flag_tree_vectorize
= opt3
;
917 flag_ipa_cp_clone
= opt3
;
918 if (flag_ipa_cp_clone
)
921 /* Just -O1/-O0 optimizations. */
922 opt1_max
= (optimize
<= 1);
923 align_loops
= opt1_max
;
924 align_jumps
= opt1_max
;
925 align_labels
= opt1_max
;
926 align_functions
= opt1_max
;
930 /* Inlining of functions reducing size is a good idea regardless of them
931 being declared inline. */
932 flag_inline_functions
= 1;
934 /* Basic optimization options. */
939 /* We want to crossjump as much as possible. */
940 set_param_value ("min-crossjump-insns", 1);
943 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
947 /* Initialize whether `char' is signed. */
948 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
949 /* Set this to a special "uninitialized" value. The actual default is
950 set after target options have been processed. */
951 flag_short_enums
= 2;
953 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
955 target_flags
= targetm
.default_target_flags
;
957 /* Some targets have ABI-specified unwind tables. */
958 flag_unwind_tables
= targetm
.unwind_tables_default
;
961 #ifdef OPTIMIZATION_OPTIONS
962 /* Allow default optimizations to be specified on a per-machine basis. */
963 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
966 handle_options (argc
, argv
, lang_mask
);
968 /* Make DUMP_BASE_NAME relative to the AUX_BASE_NAME directory,
969 typically the directory to contain the object file. */
970 if (aux_base_name
&& ! IS_ABSOLUTE_PATH (dump_base_name
))
972 const char *aux_base
;
974 base_of_path (aux_base_name
, &aux_base
);
975 if (aux_base_name
!= aux_base
)
977 int dir_len
= aux_base
- aux_base_name
;
978 char *new_dump_base_name
=
979 XNEWVEC (char, strlen(dump_base_name
) + dir_len
+ 1);
981 /* Copy directory component from AUX_BASE_NAME. */
982 memcpy (new_dump_base_name
, aux_base_name
, dir_len
);
983 /* Append existing DUMP_BASE_NAME. */
984 strcpy (new_dump_base_name
+ dir_len
, dump_base_name
);
985 dump_base_name
= new_dump_base_name
;
989 /* Handle related options for unit-at-a-time, toplevel-reorder, and
991 if (!flag_unit_at_a_time
)
993 if (flag_section_anchors
== 1)
994 error ("Section anchors must be disabled when unit-at-a-time "
996 flag_section_anchors
= 0;
997 if (flag_toplevel_reorder
== 1)
998 error ("Toplevel reorder must be disabled when unit-at-a-time "
1000 flag_toplevel_reorder
= 0;
1002 /* Unless the user has asked for section anchors, we disable toplevel
1003 reordering at -O0 to disable transformations that might be surprising
1004 to end users and to get -fno-toplevel-reorder tested. */
1005 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
1007 flag_toplevel_reorder
= 0;
1008 flag_section_anchors
= 0;
1010 if (!flag_toplevel_reorder
)
1012 if (flag_section_anchors
== 1)
1013 error ("section anchors must be disabled when toplevel reorder"
1015 flag_section_anchors
= 0;
1021 flag_pic
= flag_pie
;
1022 if (flag_pic
&& !flag_pie
)
1028 /* Inlining does not work if not optimizing,
1029 so force it not to be done. */
1034 /* The optimization to partition hot and cold basic blocks into separate
1035 sections of the .o and executable files does not work (currently)
1036 with exception handling. This is because there is no support for
1037 generating unwind info. If flag_exceptions is turned on we need to
1038 turn off the partitioning optimization. */
1040 if (flag_exceptions
&& flag_reorder_blocks_and_partition
1041 && (USING_SJLJ_EXCEPTIONS
1042 #ifdef TARGET_UNWIND_INFO
1047 inform (input_location
,
1048 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1049 flag_reorder_blocks_and_partition
= 0;
1050 flag_reorder_blocks
= 1;
1053 /* If user requested unwind info, then turn off the partitioning
1056 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1057 && flag_reorder_blocks_and_partition
1058 && (USING_SJLJ_EXCEPTIONS
1059 #ifdef TARGET_UNWIND_INFO
1064 inform (input_location
,
1065 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1066 flag_reorder_blocks_and_partition
= 0;
1067 flag_reorder_blocks
= 1;
1070 /* If the target requested unwind info, then turn off the partitioning
1071 optimization with a different message. Likewise, if the target does not
1072 support named sections. */
1074 if (flag_reorder_blocks_and_partition
1075 && (!targetm
.have_named_sections
1076 || (flag_unwind_tables
&& targetm
.unwind_tables_default
1077 && (USING_SJLJ_EXCEPTIONS
1078 #ifdef TARGET_UNWIND_INFO
1083 inform (input_location
,
1084 "-freorder-blocks-and-partition does not work on this architecture");
1085 flag_reorder_blocks_and_partition
= 0;
1086 flag_reorder_blocks
= 1;
1089 /* Pipelining of outer loops is only possible when general pipelining
1090 capabilities are requested. */
1091 if (!flag_sel_sched_pipelining
)
1092 flag_sel_sched_pipelining_outer_loops
= 0;
1094 if (!targetm
.ira_cover_classes
1095 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1097 inform (input_location
,
1098 "-fira-algorithm=CB does not work on this architecture");
1099 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1102 /* Save the current optimization options if this is the first call. */
1105 optimization_default_node
= build_optimization_node ();
1106 optimization_current_node
= optimization_default_node
;
1107 first_time_p
= false;
1109 if (flag_conserve_stack
)
1111 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1112 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1113 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1114 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1119 #define LEFT_COLUMN 27
1121 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1122 followed by word-wrapped HELP in a second column. */
1124 wrap_help (const char *help
,
1126 unsigned int item_width
,
1127 unsigned int columns
)
1129 unsigned int col_width
= LEFT_COLUMN
;
1130 unsigned int remaining
, room
, len
;
1132 remaining
= strlen (help
);
1136 room
= columns
- 3 - MAX (col_width
, item_width
);
1145 for (i
= 0; help
[i
]; i
++)
1147 if (i
>= room
&& len
!= remaining
)
1151 else if ((help
[i
] == '-' || help
[i
] == '/')
1152 && help
[i
+ 1] != ' '
1153 && i
> 0 && ISALPHA (help
[i
- 1]))
1158 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1160 while (help
[len
] == ' ')
1168 /* Print help for a specific front-end, etc. */
1170 print_filtered_help (unsigned int include_flags
,
1171 unsigned int exclude_flags
,
1172 unsigned int any_flags
,
1173 unsigned int columns
)
1177 static char *printed
= NULL
;
1179 bool displayed
= false;
1181 if (include_flags
== CL_PARAMS
)
1183 for (i
= 0; i
< LAST_PARAM
; i
++)
1185 const char *param
= compiler_params
[i
].option
;
1187 help
= compiler_params
[i
].help
;
1188 if (help
== NULL
|| *help
== '\0')
1190 if (exclude_flags
& CL_UNDOCUMENTED
)
1192 help
= undocumented_msg
;
1195 /* Get the translation. */
1198 wrap_help (help
, param
, strlen (param
), columns
);
1205 printed
= XCNEWVAR (char, cl_options_count
);
1207 for (i
= 0; i
< cl_options_count
; i
++)
1209 static char new_help
[128];
1210 const struct cl_option
*option
= cl_options
+ i
;
1215 if (include_flags
== 0
1216 || ((option
->flags
& include_flags
) != include_flags
))
1218 if ((option
->flags
& any_flags
) == 0)
1222 /* Skip unwanted switches. */
1223 if ((option
->flags
& exclude_flags
) != 0)
1227 /* Skip switches that have already been printed. */
1233 help
= option
->help
;
1236 if (exclude_flags
& CL_UNDOCUMENTED
)
1238 help
= undocumented_msg
;
1241 /* Get the translation. */
1244 /* Find the gap between the name of the
1245 option and its descriptive text. */
1246 tab
= strchr (help
, '\t');
1255 opt
= option
->opt_text
;
1259 /* With the -Q option enabled we change the descriptive text associated
1260 with an option to be an indication of its current setting. */
1263 if (len
< (LEFT_COLUMN
+ 2))
1264 strcpy (new_help
, "\t\t");
1266 strcpy (new_help
, "\t");
1268 if (option
->flag_var
!= NULL
)
1270 if (option
->flags
& CL_JOINED
)
1272 if (option
->var_type
== CLVC_STRING
)
1274 if (* (const char **) option
->flag_var
!= NULL
)
1275 snprintf (new_help
+ strlen (new_help
),
1276 sizeof (new_help
) - strlen (new_help
),
1277 * (const char **) option
->flag_var
);
1280 sprintf (new_help
+ strlen (new_help
),
1281 "%#x", * (int *) option
->flag_var
);
1284 strcat (new_help
, option_enabled (i
)
1285 ? _("[enabled]") : _("[disabled]"));
1291 wrap_help (help
, opt
, len
, columns
);
1297 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1300 printf (_(" No options with the desired characteristics were found\n"));
1305 /* PR 31349: Tell the user how to see all of the
1306 options supported by a specific front end. */
1307 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1308 if ((1U << i
) & langs
)
1309 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1310 lang_names
[i
], lang_names
[i
]);
1314 else if (! displayed
)
1315 printf (_(" All options with the desired characteristics have already been displayed\n"));
1320 /* Display help for a specified type of option.
1321 The options must have ALL of the INCLUDE_FLAGS set
1322 ANY of the flags in the ANY_FLAGS set
1323 and NONE of the EXCLUDE_FLAGS set. */
1325 print_specific_help (unsigned int include_flags
,
1326 unsigned int exclude_flags
,
1327 unsigned int any_flags
)
1329 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1330 const char * description
= NULL
;
1331 const char * descrip_extra
= "";
1334 static unsigned int columns
= 0;
1336 /* Sanity check: Make sure that we do not have more
1337 languages than we have bits available to enumerate them. */
1338 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1340 /* If we have not done so already, obtain
1341 the desired maximum width of the output. */
1346 GET_ENVIRONMENT (p
, "COLUMNS");
1349 int value
= atoi (p
);
1356 /* Use a reasonable default. */
1360 /* Decide upon the title for the options that we are going to display. */
1361 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1363 switch (flag
& include_flags
)
1369 description
= _("The following options are target specific");
1372 description
= _("The following options control compiler warning messages");
1374 case CL_OPTIMIZATION
:
1375 description
= _("The following options control optimizations");
1378 description
= _("The following options are language-independent");
1381 description
= _("The --param option recognizes the following as parameters");
1384 if (i
>= cl_lang_count
)
1386 if (exclude_flags
& all_langs_mask
)
1387 description
= _("The following options are specific to just the language ");
1389 description
= _("The following options are supported by the language ");
1390 descrip_extra
= lang_names
[i
];
1395 if (description
== NULL
)
1399 if (include_flags
& CL_UNDOCUMENTED
)
1400 description
= _("The following options are not documented");
1401 else if (include_flags
& CL_SEPARATE
)
1402 description
= _("The following options take separate arguments");
1403 else if (include_flags
& CL_JOINED
)
1404 description
= _("The following options take joined arguments");
1407 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1414 if (any_flags
& all_langs_mask
)
1415 description
= _("The following options are language-related");
1417 description
= _("The following options are language-independent");
1421 printf ("%s%s:\n", description
, descrip_extra
);
1422 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1425 /* Handle target- and language-independent options. Return zero to
1426 generate an "unknown option" message. Only options that need
1427 extra handling need to be listed here; if you simply want
1428 VALUE assigned to a variable, it happens automatically. */
1431 common_handle_option (size_t scode
, const char *arg
, int value
,
1432 unsigned int lang_mask
)
1434 static bool verbose
= false;
1435 enum opt_code code
= (enum opt_code
) scode
;
1450 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1451 unsigned int undoc_mask
;
1454 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1455 /* First display any single language specific options. */
1456 for (i
= 0; i
< cl_lang_count
; i
++)
1458 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1459 /* Next display any multi language specific options. */
1460 print_specific_help (0, undoc_mask
, all_langs_mask
);
1461 /* Then display any remaining, non-language options. */
1462 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1463 print_specific_help (i
, undoc_mask
, 0);
1464 exit_after_options
= true;
1468 case OPT_ftarget_help
:
1469 case OPT__target_help
:
1470 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1471 exit_after_options
= true;
1473 /* Allow the target a chance to give the user some additional information. */
1474 if (targetm
.target_help
)
1475 targetm
.target_help ();
1481 const char * a
= arg
;
1482 unsigned int include_flags
= 0;
1483 /* Note - by default we include undocumented options when listing
1484 specific classes. If you only want to see documented options
1485 then add ",^undocumented" to the --help= option. E.g.:
1487 --help=target,^undocumented */
1488 unsigned int exclude_flags
= 0;
1490 /* Walk along the argument string, parsing each word in turn.
1492 arg = [^]{word}[,{arg}]
1493 word = {optimizers|target|warnings|undocumented|
1494 params|common|<language>} */
1499 const char * string
;
1504 { "optimizers", CL_OPTIMIZATION
},
1505 { "target", CL_TARGET
},
1506 { "warnings", CL_WARNING
},
1507 { "undocumented", CL_UNDOCUMENTED
},
1508 { "params", CL_PARAMS
},
1509 { "joined", CL_JOINED
},
1510 { "separate", CL_SEPARATE
},
1511 { "common", CL_COMMON
},
1514 unsigned int * pflags
;
1516 unsigned int lang_flag
, specific_flag
;
1523 pflags
= & exclude_flags
;
1526 pflags
= & include_flags
;
1528 comma
= strchr (a
, ',');
1539 /* Check to see if the string matches an option class name. */
1540 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1541 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1543 specific_flag
= specifics
[i
].flag
;
1547 /* Check to see if the string matches a language name.
1548 Note - we rely upon the alpha-sorted nature of the entries in
1549 the lang_names array, specifically that shorter names appear
1550 before their longer variants. (i.e. C before C++). That way
1551 when we are attempting to match --help=c for example we will
1552 match with C first and not C++. */
1553 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1554 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1556 lang_flag
= 1U << i
;
1560 if (specific_flag
!= 0)
1563 * pflags
|= specific_flag
;
1566 /* The option's argument matches both the start of a
1567 language name and the start of an option class name.
1568 We have a special case for when the user has
1569 specified "--help=c", but otherwise we have to issue
1571 if (strncasecmp (a
, "c", len
) == 0)
1572 * pflags
|= lang_flag
;
1575 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1579 else if (lang_flag
!= 0)
1580 * pflags
|= lang_flag
;
1583 "warning: unrecognized argument to --help= option: %.*s\n",
1592 print_specific_help (include_flags
, exclude_flags
, 0);
1593 exit_after_options
= true;
1599 exit_after_options
= true;
1603 g_switch_value
= value
;
1604 g_switch_set
= true;
1609 /* Currently handled in a prescan. */
1613 enable_warning_as_error (arg
, value
, lang_mask
);
1616 case OPT_Wlarger_than_
:
1617 /* This form corresponds to -Wlarger-than-.
1618 Kept for backward compatibility.
1619 Don't use it as the first argument of warning(). */
1621 case OPT_Wlarger_than_eq
:
1622 larger_than_size
= value
;
1623 warn_larger_than
= value
!= -1;
1626 case OPT_Wframe_larger_than_
:
1627 frame_larger_than_size
= value
;
1628 warn_frame_larger_than
= value
!= -1;
1631 case OPT_Wstrict_aliasing
:
1632 set_Wstrict_aliasing (value
);
1635 case OPT_Wstrict_aliasing_
:
1636 warn_strict_aliasing
= value
;
1639 case OPT_Wstrict_overflow
:
1640 warn_strict_overflow
= (value
1641 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1645 case OPT_Wstrict_overflow_
:
1646 warn_strict_overflow
= value
;
1650 warn_unused
= value
;
1655 aux_info_file_name
= arg
;
1656 flag_gen_aux_info
= 1;
1660 aux_base_name
= arg
;
1663 case OPT_auxbase_strip
:
1665 char *tmp
= xstrdup (arg
);
1666 strip_off_ending (tmp
, strlen (tmp
));
1668 aux_base_name
= tmp
;
1673 decode_d_option (arg
);
1677 dump_base_name
= arg
;
1680 case OPT_falign_functions_
:
1681 align_functions
= value
;
1684 case OPT_falign_jumps_
:
1685 align_jumps
= value
;
1688 case OPT_falign_labels_
:
1689 align_labels
= value
;
1692 case OPT_falign_loops_
:
1693 align_loops
= value
;
1696 case OPT_fbranch_probabilities
:
1697 flag_branch_probabilities_set
= true;
1700 case OPT_fcall_used_
:
1701 fix_register (arg
, 0, 1);
1704 case OPT_fcall_saved_
:
1705 fix_register (arg
, 0, 0);
1709 dbg_cnt_process_opt (arg
);
1712 case OPT_fdbg_cnt_list
:
1713 dbg_cnt_list_all_counters ();
1716 case OPT_fdebug_prefix_map_
:
1717 add_debug_prefix_map (arg
);
1720 case OPT_fdiagnostics_show_location_
:
1721 if (!strcmp (arg
, "once"))
1722 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1723 else if (!strcmp (arg
, "every-line"))
1724 diagnostic_prefixing_rule (global_dc
)
1725 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1730 case OPT_fdiagnostics_show_option
:
1731 global_dc
->show_option_requested
= true;
1735 if (!dump_switch_p (arg
))
1739 case OPT_fexcess_precision_
:
1740 if (!strcmp (arg
, "fast"))
1741 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1742 else if (!strcmp (arg
, "standard"))
1743 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1745 error ("unknown excess precision style \"%s\"", arg
);
1748 case OPT_ffast_math
:
1749 set_fast_math_flags (value
);
1752 case OPT_funsafe_math_optimizations
:
1753 set_unsafe_math_optimizations_flags (value
);
1757 fix_register (arg
, 1, 1);
1760 case OPT_finline_limit_
:
1761 case OPT_finline_limit_eq
:
1762 set_param_value ("max-inline-insns-single", value
/ 2);
1763 set_param_value ("max-inline-insns-auto", value
/ 2);
1766 case OPT_finstrument_functions_exclude_function_list_
:
1767 add_comma_separated_to_vector
1768 (&flag_instrument_functions_exclude_functions
, arg
);
1771 case OPT_finstrument_functions_exclude_file_list_
:
1772 add_comma_separated_to_vector
1773 (&flag_instrument_functions_exclude_files
, arg
);
1776 case OPT_fmessage_length_
:
1777 pp_set_line_maximum_length (global_dc
->printer
, value
);
1780 case OPT_fpack_struct_
:
1781 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1782 error ("structure alignment must be a small power of two, not %d", value
);
1785 initial_max_fld_align
= value
;
1786 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1790 case OPT_fpeel_loops
:
1791 flag_peel_loops_set
= true;
1795 #ifdef ENABLE_PLUGIN
1796 add_new_plugin (arg
);
1798 error ("Plugin support is disabled. Configure with --enable-plugin.");
1802 case OPT_fplugin_arg_
:
1803 #ifdef ENABLE_PLUGIN
1804 parse_plugin_arg_opt (arg
);
1806 error ("Plugin support is disabled. Configure with --enable-plugin.");
1810 case OPT_fprofile_arcs
:
1811 profile_arc_flag_set
= true;
1814 case OPT_finline_functions
:
1815 flag_inline_functions_set
= true;
1818 case OPT_fprofile_dir_
:
1819 profile_data_prefix
= xstrdup (arg
);
1822 case OPT_fprofile_use_
:
1823 profile_data_prefix
= xstrdup (arg
);
1824 flag_profile_use
= true;
1826 /* No break here - do -fprofile-use processing. */
1827 case OPT_fprofile_use
:
1828 if (!flag_branch_probabilities_set
)
1829 flag_branch_probabilities
= value
;
1830 if (!flag_profile_values_set
)
1831 flag_profile_values
= value
;
1832 if (!flag_unroll_loops_set
)
1833 flag_unroll_loops
= value
;
1834 if (!flag_peel_loops_set
)
1835 flag_peel_loops
= value
;
1836 if (!flag_tracer_set
)
1837 flag_tracer
= value
;
1838 if (!flag_value_profile_transformations_set
)
1839 flag_value_profile_transformations
= value
;
1840 if (!flag_inline_functions_set
)
1841 flag_inline_functions
= value
;
1842 if (!flag_ipa_cp_set
)
1843 flag_ipa_cp
= value
;
1844 if (!flag_ipa_cp_clone_set
1845 && value
&& flag_ipa_cp
)
1846 flag_ipa_cp_clone
= value
;
1847 if (!flag_predictive_commoning_set
)
1848 flag_predictive_commoning
= value
;
1849 if (!flag_unswitch_loops_set
)
1850 flag_unswitch_loops
= value
;
1851 if (!flag_gcse_after_reload_set
)
1852 flag_gcse_after_reload
= value
;
1855 case OPT_fprofile_generate_
:
1856 profile_data_prefix
= xstrdup (arg
);
1858 /* No break here - do -fprofile-generate processing. */
1859 case OPT_fprofile_generate
:
1860 if (!profile_arc_flag_set
)
1861 profile_arc_flag
= value
;
1862 if (!flag_profile_values_set
)
1863 flag_profile_values
= value
;
1864 if (!flag_value_profile_transformations_set
)
1865 flag_value_profile_transformations
= value
;
1866 if (!flag_inline_functions_set
)
1867 flag_inline_functions
= value
;
1870 case OPT_fprofile_values
:
1871 flag_profile_values_set
= true;
1874 case OPT_fvisibility_
:
1876 if (!strcmp(arg
, "default"))
1877 default_visibility
= VISIBILITY_DEFAULT
;
1878 else if (!strcmp(arg
, "internal"))
1879 default_visibility
= VISIBILITY_INTERNAL
;
1880 else if (!strcmp(arg
, "hidden"))
1881 default_visibility
= VISIBILITY_HIDDEN
;
1882 else if (!strcmp(arg
, "protected"))
1883 default_visibility
= VISIBILITY_PROTECTED
;
1885 error ("unrecognized visibility value \"%s\"", arg
);
1890 flag_value_profile_transformations_set
= true;
1893 case OPT_frandom_seed
:
1894 /* The real switch is -fno-random-seed. */
1897 set_random_seed (NULL
);
1900 case OPT_frandom_seed_
:
1901 set_random_seed (arg
);
1904 case OPT_fselective_scheduling
:
1905 case OPT_fselective_scheduling2
:
1906 sel_sched_switch_set
= true;
1909 case OPT_fsched_verbose_
:
1910 #ifdef INSN_SCHEDULING
1911 fix_sched_param ("verbose", arg
);
1917 case OPT_fsched_stalled_insns_
:
1918 flag_sched_stalled_insns
= value
;
1919 if (flag_sched_stalled_insns
== 0)
1920 flag_sched_stalled_insns
= -1;
1923 case OPT_fsched_stalled_insns_dep_
:
1924 flag_sched_stalled_insns_dep
= value
;
1927 case OPT_fstack_check_
:
1928 if (!strcmp (arg
, "no"))
1929 flag_stack_check
= NO_STACK_CHECK
;
1930 else if (!strcmp (arg
, "generic"))
1931 /* This is the old stack checking method. */
1932 flag_stack_check
= STACK_CHECK_BUILTIN
1933 ? FULL_BUILTIN_STACK_CHECK
1934 : GENERIC_STACK_CHECK
;
1935 else if (!strcmp (arg
, "specific"))
1936 /* This is the new stack checking method. */
1937 flag_stack_check
= STACK_CHECK_BUILTIN
1938 ? FULL_BUILTIN_STACK_CHECK
1939 : STACK_CHECK_STATIC_BUILTIN
1940 ? STATIC_BUILTIN_STACK_CHECK
1941 : GENERIC_STACK_CHECK
;
1943 warning (0, "unknown stack check parameter \"%s\"", arg
);
1946 case OPT_fstack_check
:
1947 /* This is the same as the "specific" mode above. */
1949 flag_stack_check
= STACK_CHECK_BUILTIN
1950 ? FULL_BUILTIN_STACK_CHECK
1951 : STACK_CHECK_STATIC_BUILTIN
1952 ? STATIC_BUILTIN_STACK_CHECK
1953 : GENERIC_STACK_CHECK
;
1955 flag_stack_check
= NO_STACK_CHECK
;
1958 case OPT_fstack_limit
:
1959 /* The real switch is -fno-stack-limit. */
1962 stack_limit_rtx
= NULL_RTX
;
1965 case OPT_fstack_limit_register_
:
1967 int reg
= decode_reg_name (arg
);
1969 error ("unrecognized register name \"%s\"", arg
);
1971 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1975 case OPT_fstack_limit_symbol_
:
1976 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1979 case OPT_ftree_vectorizer_verbose_
:
1980 vect_set_verbosity_level (arg
);
1983 case OPT_ftls_model_
:
1984 if (!strcmp (arg
, "global-dynamic"))
1985 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
1986 else if (!strcmp (arg
, "local-dynamic"))
1987 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
1988 else if (!strcmp (arg
, "initial-exec"))
1989 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
1990 else if (!strcmp (arg
, "local-exec"))
1991 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
1993 warning (0, "unknown tls-model \"%s\"", arg
);
1996 case OPT_fira_algorithm_
:
1997 if (!strcmp (arg
, "CB"))
1998 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
1999 else if (!strcmp (arg
, "priority"))
2000 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
2002 warning (0, "unknown ira algorithm \"%s\"", arg
);
2005 case OPT_fira_region_
:
2006 if (!strcmp (arg
, "one"))
2007 flag_ira_region
= IRA_REGION_ONE
;
2008 else if (!strcmp (arg
, "all"))
2009 flag_ira_region
= IRA_REGION_ALL
;
2010 else if (!strcmp (arg
, "mixed"))
2011 flag_ira_region
= IRA_REGION_MIXED
;
2013 warning (0, "unknown ira region \"%s\"", arg
);
2016 case OPT_fira_verbose_
:
2017 flag_ira_verbose
= value
;
2021 flag_tracer_set
= true;
2025 flag_ipa_cp_set
= true;
2028 case OPT_fipa_cp_clone
:
2029 flag_ipa_cp_clone_set
= true;
2032 case OPT_fpredictive_commoning
:
2033 flag_predictive_commoning_set
= true;
2036 case OPT_funswitch_loops
:
2037 flag_unswitch_loops_set
= true;
2040 case OPT_fgcse_after_reload
:
2041 flag_gcse_after_reload_set
= true;
2044 case OPT_funroll_loops
:
2045 flag_unroll_loops_set
= true;
2049 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2053 set_debug_level (SDB_DEBUG
, false, arg
);
2057 if (value
< 2 || value
> 3)
2058 error ("dwarf version %d is not supported", value
);
2060 dwarf_version
= value
;
2061 set_debug_level (DWARF2_DEBUG
, false, "");
2065 set_debug_level (NO_DEBUG
, 2, arg
);
2070 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2074 set_debug_level (VMS_DEBUG
, false, arg
);
2079 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2083 asm_file_name
= arg
;
2086 case OPT_pedantic_errors
:
2087 flag_pedantic_errors
= pedantic
= 1;
2091 case OPT_fcse_skip_blocks
:
2092 case OPT_floop_optimize
:
2093 case OPT_frerun_loop_opt
:
2094 case OPT_fstrength_reduce
:
2095 case OPT_ftree_store_copy_prop
:
2096 case OPT_fforce_addr
:
2097 case OPT_ftree_salias
:
2098 case OPT_ftree_store_ccp
:
2099 /* These are no-ops, preserved for backward compatibility. */
2103 /* If the flag was handled in a standard way, assume the lack of
2104 processing here is intentional. */
2105 gcc_assert (cl_options
[scode
].flag_var
);
2112 /* Handle --param NAME=VALUE. */
2114 handle_param (const char *carg
)
2119 arg
= xstrdup (carg
);
2120 equal
= strchr (arg
, '=');
2122 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2125 value
= integral_argument (equal
+ 1);
2127 error ("invalid --param value %qs", equal
+ 1);
2131 set_param_value (arg
, value
);
2138 /* Used to set the level of strict aliasing warnings,
2139 when no level is specified (i.e., when -Wstrict-aliasing, and not
2140 -Wstrict-aliasing=level was given).
2141 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2142 and 0 otherwise. After calling this function, wstrict_aliasing will be
2143 set to the default value of -Wstrict_aliasing=level, currently 3. */
2145 set_Wstrict_aliasing (int onoff
)
2147 gcc_assert (onoff
== 0 || onoff
== 1);
2149 warn_strict_aliasing
= 3;
2151 warn_strict_aliasing
= 0;
2154 /* The following routines are useful in setting all the flags that
2155 -ffast-math and -fno-fast-math imply. */
2157 set_fast_math_flags (int set
)
2159 flag_unsafe_math_optimizations
= set
;
2160 set_unsafe_math_optimizations_flags (set
);
2161 flag_finite_math_only
= set
;
2162 flag_errno_math
= !set
;
2165 flag_signaling_nans
= 0;
2166 flag_rounding_math
= 0;
2167 flag_cx_limited_range
= 1;
2171 /* When -funsafe-math-optimizations is set the following
2172 flags are set as well. */
2174 set_unsafe_math_optimizations_flags (int set
)
2176 flag_trapping_math
= !set
;
2177 flag_signed_zeros
= !set
;
2178 flag_associative_math
= set
;
2179 flag_reciprocal_math
= set
;
2182 /* Return true iff flags are set as if -ffast-math. */
2184 fast_math_flags_set_p (void)
2186 return (!flag_trapping_math
2187 && flag_unsafe_math_optimizations
2188 && flag_finite_math_only
2189 && !flag_signed_zeros
2190 && !flag_errno_math
);
2193 /* Return true iff flags are set as if -ffast-math but using the flags stored
2194 in the struct cl_optimization structure. */
2196 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2198 return (!opt
->flag_trapping_math
2199 && opt
->flag_unsafe_math_optimizations
2200 && opt
->flag_finite_math_only
2201 && !opt
->flag_signed_zeros
2202 && !opt
->flag_errno_math
);
2205 /* Handle a debug output -g switch. EXTENDED is true or false to support
2206 extended output (2 is special and means "-ggdb" was given). */
2208 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2210 static bool type_explicit
;
2212 use_gnu_debug_info_extensions
= extended
;
2214 if (type
== NO_DEBUG
)
2216 if (write_symbols
== NO_DEBUG
)
2218 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2222 #ifdef DWARF2_DEBUGGING_INFO
2223 write_symbols
= DWARF2_DEBUG
;
2224 #elif defined DBX_DEBUGGING_INFO
2225 write_symbols
= DBX_DEBUG
;
2229 if (write_symbols
== NO_DEBUG
)
2230 warning (0, "target system does not support debug output");
2235 /* Does it conflict with an already selected type? */
2236 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2237 error ("debug format \"%s\" conflicts with prior selection",
2238 debug_type_names
[type
]);
2239 write_symbols
= type
;
2240 type_explicit
= true;
2243 /* A debug flag without a level defaults to level 2. */
2246 if (!debug_info_level
)
2247 debug_info_level
= DINFO_LEVEL_NORMAL
;
2251 int argval
= integral_argument (arg
);
2253 error ("unrecognised debug output level \"%s\"", arg
);
2254 else if (argval
> 3)
2255 error ("debug output level %s is too high", arg
);
2257 debug_info_level
= (enum debug_info_level
) argval
;
2261 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2262 a simple on-off switch. */
2265 option_enabled (int opt_idx
)
2267 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2269 if (option
->flag_var
)
2270 switch (option
->var_type
)
2273 return *(int *) option
->flag_var
!= 0;
2276 return *(int *) option
->flag_var
== option
->var_value
;
2278 case CLVC_BIT_CLEAR
:
2279 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2282 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2290 /* Fill STATE with the current state of option OPTION. Return true if
2291 there is some state to store. */
2294 get_option_state (int option
, struct cl_option_state
*state
)
2296 if (cl_options
[option
].flag_var
== 0)
2299 switch (cl_options
[option
].var_type
)
2303 state
->data
= cl_options
[option
].flag_var
;
2304 state
->size
= sizeof (int);
2307 case CLVC_BIT_CLEAR
:
2309 state
->ch
= option_enabled (option
);
2310 state
->data
= &state
->ch
;
2315 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2316 if (state
->data
== 0)
2318 state
->size
= strlen ((const char *) state
->data
) + 1;
2324 /* Enable a warning option as an error. This is used by -Werror= and
2325 also by legacy Werror-implicit-function-declaration. */
2328 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2333 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2334 new_option
[0] = 'W';
2335 strcpy (new_option
+ 1, arg
);
2336 option_index
= find_opt (new_option
, lang_mask
);
2337 if (option_index
== N_OPTS
)
2339 error ("-Werror=%s: No option -%s", arg
, new_option
);
2343 diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2344 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2346 /* -Werror=foo implies -Wfoo. */
2347 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2348 && cl_options
[option_index
].flag_var
2349 && kind
== DK_ERROR
)
2350 *(int *) cl_options
[option_index
].flag_var
= 1;