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);
877 flag_graphite_identity
= opt2
;
878 flag_loop_strip_mine
= opt2
;
879 flag_loop_interchange
= opt2
;
880 flag_loop_block
= opt2
;
882 flag_inline_small_functions
= opt2
;
883 flag_indirect_inlining
= opt2
;
884 flag_thread_jumps
= opt2
;
885 flag_crossjumping
= opt2
;
886 flag_optimize_sibling_calls
= opt2
;
887 flag_cse_follow_jumps
= opt2
;
889 flag_expensive_optimizations
= opt2
;
890 flag_rerun_cse_after_loop
= opt2
;
891 flag_caller_saves
= opt2
;
892 flag_peephole2
= opt2
;
893 #ifdef INSN_SCHEDULING
894 flag_schedule_insns
= opt2
;
895 flag_schedule_insns_after_reload
= opt2
;
898 flag_strict_aliasing
= opt2
;
899 flag_strict_overflow
= opt2
;
900 flag_reorder_blocks
= opt2
;
901 flag_reorder_functions
= opt2
;
902 flag_tree_vrp
= opt2
;
903 flag_tree_builtin_call_dce
= opt2
;
904 flag_tree_pre
= opt2
;
905 flag_tree_switch_conversion
= 1;
908 /* Track fields in field-sensitive alias analysis. */
909 set_param_value ("max-fields-for-field-sensitive",
910 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
912 /* For -O1 only do loop invariant motion for very small loops. */
913 set_param_value ("loop-invariant-max-bbs-in-loop",
914 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
916 /* -O3 optimizations. */
917 opt3
= (optimize
>= 3);
918 flag_predictive_commoning
= opt3
;
919 flag_inline_functions
= opt3
;
920 flag_unswitch_loops
= opt3
;
921 flag_gcse_after_reload
= opt3
;
922 flag_tree_vectorize
= opt3
;
923 flag_ipa_cp_clone
= opt3
;
924 if (flag_ipa_cp_clone
)
927 /* Just -O1/-O0 optimizations. */
928 opt1_max
= (optimize
<= 1);
929 align_loops
= opt1_max
;
930 align_jumps
= opt1_max
;
931 align_labels
= opt1_max
;
932 align_functions
= opt1_max
;
936 /* Inlining of functions reducing size is a good idea regardless of them
937 being declared inline. */
938 flag_inline_functions
= 1;
940 /* Basic optimization options. */
945 /* We want to crossjump as much as possible. */
946 set_param_value ("min-crossjump-insns", 1);
949 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
953 /* Initialize whether `char' is signed. */
954 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
955 /* Set this to a special "uninitialized" value. The actual default is
956 set after target options have been processed. */
957 flag_short_enums
= 2;
959 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
961 target_flags
= targetm
.default_target_flags
;
963 /* Some targets have ABI-specified unwind tables. */
964 flag_unwind_tables
= targetm
.unwind_tables_default
;
967 #ifdef OPTIMIZATION_OPTIONS
968 /* Allow default optimizations to be specified on a per-machine basis. */
969 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
972 handle_options (argc
, argv
, lang_mask
);
974 /* Make DUMP_BASE_NAME relative to the AUX_BASE_NAME directory,
975 typically the directory to contain the object file. */
976 if (aux_base_name
&& ! IS_ABSOLUTE_PATH (dump_base_name
))
978 const char *aux_base
;
980 base_of_path (aux_base_name
, &aux_base
);
981 if (aux_base_name
!= aux_base
)
983 int dir_len
= aux_base
- aux_base_name
;
984 char *new_dump_base_name
=
985 XNEWVEC (char, strlen(dump_base_name
) + dir_len
+ 1);
987 /* Copy directory component from AUX_BASE_NAME. */
988 memcpy (new_dump_base_name
, aux_base_name
, dir_len
);
989 /* Append existing DUMP_BASE_NAME. */
990 strcpy (new_dump_base_name
+ dir_len
, dump_base_name
);
991 dump_base_name
= new_dump_base_name
;
995 /* Handle related options for unit-at-a-time, toplevel-reorder, and
997 if (!flag_unit_at_a_time
)
999 if (flag_section_anchors
== 1)
1000 error ("Section anchors must be disabled when unit-at-a-time "
1002 flag_section_anchors
= 0;
1003 if (flag_toplevel_reorder
== 1)
1004 error ("Toplevel reorder must be disabled when unit-at-a-time "
1006 flag_toplevel_reorder
= 0;
1008 /* Unless the user has asked for section anchors, we disable toplevel
1009 reordering at -O0 to disable transformations that might be surprising
1010 to end users and to get -fno-toplevel-reorder tested. */
1011 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
1013 flag_toplevel_reorder
= 0;
1014 flag_section_anchors
= 0;
1016 if (!flag_toplevel_reorder
)
1018 if (flag_section_anchors
== 1)
1019 error ("section anchors must be disabled when toplevel reorder"
1021 flag_section_anchors
= 0;
1027 flag_pic
= flag_pie
;
1028 if (flag_pic
&& !flag_pie
)
1034 /* Inlining does not work if not optimizing,
1035 so force it not to be done. */
1040 /* The optimization to partition hot and cold basic blocks into separate
1041 sections of the .o and executable files does not work (currently)
1042 with exception handling. This is because there is no support for
1043 generating unwind info. If flag_exceptions is turned on we need to
1044 turn off the partitioning optimization. */
1046 if (flag_exceptions
&& flag_reorder_blocks_and_partition
1047 && (USING_SJLJ_EXCEPTIONS
1048 #ifdef TARGET_UNWIND_INFO
1053 inform (input_location
,
1054 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1055 flag_reorder_blocks_and_partition
= 0;
1056 flag_reorder_blocks
= 1;
1059 /* If user requested unwind info, then turn off the partitioning
1062 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1063 && flag_reorder_blocks_and_partition
1064 && (USING_SJLJ_EXCEPTIONS
1065 #ifdef TARGET_UNWIND_INFO
1070 inform (input_location
,
1071 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1072 flag_reorder_blocks_and_partition
= 0;
1073 flag_reorder_blocks
= 1;
1076 /* If the target requested unwind info, then turn off the partitioning
1077 optimization with a different message. Likewise, if the target does not
1078 support named sections. */
1080 if (flag_reorder_blocks_and_partition
1081 && (!targetm
.have_named_sections
1082 || (flag_unwind_tables
&& targetm
.unwind_tables_default
1083 && (USING_SJLJ_EXCEPTIONS
1084 #ifdef TARGET_UNWIND_INFO
1089 inform (input_location
,
1090 "-freorder-blocks-and-partition does not work on this architecture");
1091 flag_reorder_blocks_and_partition
= 0;
1092 flag_reorder_blocks
= 1;
1095 /* Pipelining of outer loops is only possible when general pipelining
1096 capabilities are requested. */
1097 if (!flag_sel_sched_pipelining
)
1098 flag_sel_sched_pipelining_outer_loops
= 0;
1100 if (!targetm
.ira_cover_classes
1101 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1103 inform (input_location
,
1104 "-fira-algorithm=CB does not work on this architecture");
1105 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1108 /* Save the current optimization options if this is the first call. */
1111 optimization_default_node
= build_optimization_node ();
1112 optimization_current_node
= optimization_default_node
;
1113 first_time_p
= false;
1115 if (flag_conserve_stack
)
1117 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1118 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1119 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1120 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1125 #define LEFT_COLUMN 27
1127 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1128 followed by word-wrapped HELP in a second column. */
1130 wrap_help (const char *help
,
1132 unsigned int item_width
,
1133 unsigned int columns
)
1135 unsigned int col_width
= LEFT_COLUMN
;
1136 unsigned int remaining
, room
, len
;
1138 remaining
= strlen (help
);
1142 room
= columns
- 3 - MAX (col_width
, item_width
);
1151 for (i
= 0; help
[i
]; i
++)
1153 if (i
>= room
&& len
!= remaining
)
1157 else if ((help
[i
] == '-' || help
[i
] == '/')
1158 && help
[i
+ 1] != ' '
1159 && i
> 0 && ISALPHA (help
[i
- 1]))
1164 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1166 while (help
[len
] == ' ')
1174 /* Print help for a specific front-end, etc. */
1176 print_filtered_help (unsigned int include_flags
,
1177 unsigned int exclude_flags
,
1178 unsigned int any_flags
,
1179 unsigned int columns
)
1183 static char *printed
= NULL
;
1185 bool displayed
= false;
1187 if (include_flags
== CL_PARAMS
)
1189 for (i
= 0; i
< LAST_PARAM
; i
++)
1191 const char *param
= compiler_params
[i
].option
;
1193 help
= compiler_params
[i
].help
;
1194 if (help
== NULL
|| *help
== '\0')
1196 if (exclude_flags
& CL_UNDOCUMENTED
)
1198 help
= undocumented_msg
;
1201 /* Get the translation. */
1204 wrap_help (help
, param
, strlen (param
), columns
);
1211 printed
= XCNEWVAR (char, cl_options_count
);
1213 for (i
= 0; i
< cl_options_count
; i
++)
1215 static char new_help
[128];
1216 const struct cl_option
*option
= cl_options
+ i
;
1221 if (include_flags
== 0
1222 || ((option
->flags
& include_flags
) != include_flags
))
1224 if ((option
->flags
& any_flags
) == 0)
1228 /* Skip unwanted switches. */
1229 if ((option
->flags
& exclude_flags
) != 0)
1233 /* Skip switches that have already been printed. */
1239 help
= option
->help
;
1242 if (exclude_flags
& CL_UNDOCUMENTED
)
1244 help
= undocumented_msg
;
1247 /* Get the translation. */
1250 /* Find the gap between the name of the
1251 option and its descriptive text. */
1252 tab
= strchr (help
, '\t');
1261 opt
= option
->opt_text
;
1265 /* With the -Q option enabled we change the descriptive text associated
1266 with an option to be an indication of its current setting. */
1269 if (len
< (LEFT_COLUMN
+ 2))
1270 strcpy (new_help
, "\t\t");
1272 strcpy (new_help
, "\t");
1274 if (option
->flag_var
!= NULL
)
1276 if (option
->flags
& CL_JOINED
)
1278 if (option
->var_type
== CLVC_STRING
)
1280 if (* (const char **) option
->flag_var
!= NULL
)
1281 snprintf (new_help
+ strlen (new_help
),
1282 sizeof (new_help
) - strlen (new_help
),
1283 * (const char **) option
->flag_var
);
1286 sprintf (new_help
+ strlen (new_help
),
1287 "%#x", * (int *) option
->flag_var
);
1290 strcat (new_help
, option_enabled (i
)
1291 ? _("[enabled]") : _("[disabled]"));
1297 wrap_help (help
, opt
, len
, columns
);
1303 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1306 printf (_(" No options with the desired characteristics were found\n"));
1311 /* PR 31349: Tell the user how to see all of the
1312 options supported by a specific front end. */
1313 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1314 if ((1U << i
) & langs
)
1315 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1316 lang_names
[i
], lang_names
[i
]);
1320 else if (! displayed
)
1321 printf (_(" All options with the desired characteristics have already been displayed\n"));
1326 /* Display help for a specified type of option.
1327 The options must have ALL of the INCLUDE_FLAGS set
1328 ANY of the flags in the ANY_FLAGS set
1329 and NONE of the EXCLUDE_FLAGS set. */
1331 print_specific_help (unsigned int include_flags
,
1332 unsigned int exclude_flags
,
1333 unsigned int any_flags
)
1335 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1336 const char * description
= NULL
;
1337 const char * descrip_extra
= "";
1340 static unsigned int columns
= 0;
1342 /* Sanity check: Make sure that we do not have more
1343 languages than we have bits available to enumerate them. */
1344 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1346 /* If we have not done so already, obtain
1347 the desired maximum width of the output. */
1352 GET_ENVIRONMENT (p
, "COLUMNS");
1355 int value
= atoi (p
);
1362 /* Use a reasonable default. */
1366 /* Decide upon the title for the options that we are going to display. */
1367 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1369 switch (flag
& include_flags
)
1375 description
= _("The following options are target specific");
1378 description
= _("The following options control compiler warning messages");
1380 case CL_OPTIMIZATION
:
1381 description
= _("The following options control optimizations");
1384 description
= _("The following options are language-independent");
1387 description
= _("The --param option recognizes the following as parameters");
1390 if (i
>= cl_lang_count
)
1392 if (exclude_flags
& all_langs_mask
)
1393 description
= _("The following options are specific to just the language ");
1395 description
= _("The following options are supported by the language ");
1396 descrip_extra
= lang_names
[i
];
1401 if (description
== NULL
)
1405 if (include_flags
& CL_UNDOCUMENTED
)
1406 description
= _("The following options are not documented");
1407 else if (include_flags
& CL_SEPARATE
)
1408 description
= _("The following options take separate arguments");
1409 else if (include_flags
& CL_JOINED
)
1410 description
= _("The following options take joined arguments");
1413 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1420 if (any_flags
& all_langs_mask
)
1421 description
= _("The following options are language-related");
1423 description
= _("The following options are language-independent");
1427 printf ("%s%s:\n", description
, descrip_extra
);
1428 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1431 /* Handle target- and language-independent options. Return zero to
1432 generate an "unknown option" message. Only options that need
1433 extra handling need to be listed here; if you simply want
1434 VALUE assigned to a variable, it happens automatically. */
1437 common_handle_option (size_t scode
, const char *arg
, int value
,
1438 unsigned int lang_mask
)
1440 static bool verbose
= false;
1441 enum opt_code code
= (enum opt_code
) scode
;
1456 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1457 unsigned int undoc_mask
;
1460 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1461 /* First display any single language specific options. */
1462 for (i
= 0; i
< cl_lang_count
; i
++)
1464 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1465 /* Next display any multi language specific options. */
1466 print_specific_help (0, undoc_mask
, all_langs_mask
);
1467 /* Then display any remaining, non-language options. */
1468 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1469 print_specific_help (i
, undoc_mask
, 0);
1470 exit_after_options
= true;
1474 case OPT_ftarget_help
:
1475 case OPT__target_help
:
1476 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1477 exit_after_options
= true;
1479 /* Allow the target a chance to give the user some additional information. */
1480 if (targetm
.target_help
)
1481 targetm
.target_help ();
1487 const char * a
= arg
;
1488 unsigned int include_flags
= 0;
1489 /* Note - by default we include undocumented options when listing
1490 specific classes. If you only want to see documented options
1491 then add ",^undocumented" to the --help= option. E.g.:
1493 --help=target,^undocumented */
1494 unsigned int exclude_flags
= 0;
1496 /* Walk along the argument string, parsing each word in turn.
1498 arg = [^]{word}[,{arg}]
1499 word = {optimizers|target|warnings|undocumented|
1500 params|common|<language>} */
1505 const char * string
;
1510 { "optimizers", CL_OPTIMIZATION
},
1511 { "target", CL_TARGET
},
1512 { "warnings", CL_WARNING
},
1513 { "undocumented", CL_UNDOCUMENTED
},
1514 { "params", CL_PARAMS
},
1515 { "joined", CL_JOINED
},
1516 { "separate", CL_SEPARATE
},
1517 { "common", CL_COMMON
},
1520 unsigned int * pflags
;
1522 unsigned int lang_flag
, specific_flag
;
1529 pflags
= & exclude_flags
;
1532 pflags
= & include_flags
;
1534 comma
= strchr (a
, ',');
1545 /* Check to see if the string matches an option class name. */
1546 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1547 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1549 specific_flag
= specifics
[i
].flag
;
1553 /* Check to see if the string matches a language name.
1554 Note - we rely upon the alpha-sorted nature of the entries in
1555 the lang_names array, specifically that shorter names appear
1556 before their longer variants. (i.e. C before C++). That way
1557 when we are attempting to match --help=c for example we will
1558 match with C first and not C++. */
1559 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1560 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1562 lang_flag
= 1U << i
;
1566 if (specific_flag
!= 0)
1569 * pflags
|= specific_flag
;
1572 /* The option's argument matches both the start of a
1573 language name and the start of an option class name.
1574 We have a special case for when the user has
1575 specified "--help=c", but otherwise we have to issue
1577 if (strncasecmp (a
, "c", len
) == 0)
1578 * pflags
|= lang_flag
;
1581 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1585 else if (lang_flag
!= 0)
1586 * pflags
|= lang_flag
;
1589 "warning: unrecognized argument to --help= option: %.*s\n",
1598 print_specific_help (include_flags
, exclude_flags
, 0);
1599 exit_after_options
= true;
1605 exit_after_options
= true;
1609 g_switch_value
= value
;
1610 g_switch_set
= true;
1615 /* Currently handled in a prescan. */
1619 enable_warning_as_error (arg
, value
, lang_mask
);
1622 case OPT_Wlarger_than_
:
1623 /* This form corresponds to -Wlarger-than-.
1624 Kept for backward compatibility.
1625 Don't use it as the first argument of warning(). */
1627 case OPT_Wlarger_than_eq
:
1628 larger_than_size
= value
;
1629 warn_larger_than
= value
!= -1;
1632 case OPT_Wframe_larger_than_
:
1633 frame_larger_than_size
= value
;
1634 warn_frame_larger_than
= value
!= -1;
1637 case OPT_Wstrict_aliasing
:
1638 set_Wstrict_aliasing (value
);
1641 case OPT_Wstrict_aliasing_
:
1642 warn_strict_aliasing
= value
;
1645 case OPT_Wstrict_overflow
:
1646 warn_strict_overflow
= (value
1647 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1651 case OPT_Wstrict_overflow_
:
1652 warn_strict_overflow
= value
;
1656 warn_unused
= value
;
1661 aux_info_file_name
= arg
;
1662 flag_gen_aux_info
= 1;
1666 aux_base_name
= arg
;
1669 case OPT_auxbase_strip
:
1671 char *tmp
= xstrdup (arg
);
1672 strip_off_ending (tmp
, strlen (tmp
));
1674 aux_base_name
= tmp
;
1679 decode_d_option (arg
);
1683 dump_base_name
= arg
;
1686 case OPT_falign_functions_
:
1687 align_functions
= value
;
1690 case OPT_falign_jumps_
:
1691 align_jumps
= value
;
1694 case OPT_falign_labels_
:
1695 align_labels
= value
;
1698 case OPT_falign_loops_
:
1699 align_loops
= value
;
1702 case OPT_fbranch_probabilities
:
1703 flag_branch_probabilities_set
= true;
1706 case OPT_fcall_used_
:
1707 fix_register (arg
, 0, 1);
1710 case OPT_fcall_saved_
:
1711 fix_register (arg
, 0, 0);
1715 dbg_cnt_process_opt (arg
);
1718 case OPT_fdbg_cnt_list
:
1719 dbg_cnt_list_all_counters ();
1722 case OPT_fdebug_prefix_map_
:
1723 add_debug_prefix_map (arg
);
1726 case OPT_fdiagnostics_show_location_
:
1727 if (!strcmp (arg
, "once"))
1728 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1729 else if (!strcmp (arg
, "every-line"))
1730 diagnostic_prefixing_rule (global_dc
)
1731 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1736 case OPT_fdiagnostics_show_option
:
1737 global_dc
->show_option_requested
= true;
1741 if (!dump_switch_p (arg
))
1745 case OPT_fexcess_precision_
:
1746 if (!strcmp (arg
, "fast"))
1747 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1748 else if (!strcmp (arg
, "standard"))
1749 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1751 error ("unknown excess precision style \"%s\"", arg
);
1754 case OPT_ffast_math
:
1755 set_fast_math_flags (value
);
1758 case OPT_funsafe_math_optimizations
:
1759 set_unsafe_math_optimizations_flags (value
);
1763 fix_register (arg
, 1, 1);
1766 case OPT_finline_limit_
:
1767 case OPT_finline_limit_eq
:
1768 set_param_value ("max-inline-insns-single", value
/ 2);
1769 set_param_value ("max-inline-insns-auto", value
/ 2);
1772 case OPT_finstrument_functions_exclude_function_list_
:
1773 add_comma_separated_to_vector
1774 (&flag_instrument_functions_exclude_functions
, arg
);
1777 case OPT_finstrument_functions_exclude_file_list_
:
1778 add_comma_separated_to_vector
1779 (&flag_instrument_functions_exclude_files
, arg
);
1782 case OPT_fmessage_length_
:
1783 pp_set_line_maximum_length (global_dc
->printer
, value
);
1786 case OPT_fpack_struct_
:
1787 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1788 error ("structure alignment must be a small power of two, not %d", value
);
1791 initial_max_fld_align
= value
;
1792 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1796 case OPT_fpeel_loops
:
1797 flag_peel_loops_set
= true;
1801 #ifdef ENABLE_PLUGIN
1802 add_new_plugin (arg
);
1804 error ("Plugin support is disabled. Configure with --enable-plugin.");
1808 case OPT_fplugin_arg_
:
1809 #ifdef ENABLE_PLUGIN
1810 parse_plugin_arg_opt (arg
);
1812 error ("Plugin support is disabled. Configure with --enable-plugin.");
1816 case OPT_fprofile_arcs
:
1817 profile_arc_flag_set
= true;
1820 case OPT_finline_functions
:
1821 flag_inline_functions_set
= true;
1824 case OPT_fprofile_dir_
:
1825 profile_data_prefix
= xstrdup (arg
);
1828 case OPT_fprofile_use_
:
1829 profile_data_prefix
= xstrdup (arg
);
1830 flag_profile_use
= true;
1832 /* No break here - do -fprofile-use processing. */
1833 case OPT_fprofile_use
:
1834 if (!flag_branch_probabilities_set
)
1835 flag_branch_probabilities
= value
;
1836 if (!flag_profile_values_set
)
1837 flag_profile_values
= value
;
1838 if (!flag_unroll_loops_set
)
1839 flag_unroll_loops
= value
;
1840 if (!flag_peel_loops_set
)
1841 flag_peel_loops
= value
;
1842 if (!flag_tracer_set
)
1843 flag_tracer
= value
;
1844 if (!flag_value_profile_transformations_set
)
1845 flag_value_profile_transformations
= value
;
1846 if (!flag_inline_functions_set
)
1847 flag_inline_functions
= value
;
1848 if (!flag_ipa_cp_set
)
1849 flag_ipa_cp
= value
;
1850 if (!flag_ipa_cp_clone_set
1851 && value
&& flag_ipa_cp
)
1852 flag_ipa_cp_clone
= value
;
1853 if (!flag_predictive_commoning_set
)
1854 flag_predictive_commoning
= value
;
1855 if (!flag_unswitch_loops_set
)
1856 flag_unswitch_loops
= value
;
1857 if (!flag_gcse_after_reload_set
)
1858 flag_gcse_after_reload
= value
;
1861 case OPT_fprofile_generate_
:
1862 profile_data_prefix
= xstrdup (arg
);
1864 /* No break here - do -fprofile-generate processing. */
1865 case OPT_fprofile_generate
:
1866 if (!profile_arc_flag_set
)
1867 profile_arc_flag
= value
;
1868 if (!flag_profile_values_set
)
1869 flag_profile_values
= value
;
1870 if (!flag_value_profile_transformations_set
)
1871 flag_value_profile_transformations
= value
;
1872 if (!flag_inline_functions_set
)
1873 flag_inline_functions
= value
;
1876 case OPT_fprofile_values
:
1877 flag_profile_values_set
= true;
1880 case OPT_fvisibility_
:
1882 if (!strcmp(arg
, "default"))
1883 default_visibility
= VISIBILITY_DEFAULT
;
1884 else if (!strcmp(arg
, "internal"))
1885 default_visibility
= VISIBILITY_INTERNAL
;
1886 else if (!strcmp(arg
, "hidden"))
1887 default_visibility
= VISIBILITY_HIDDEN
;
1888 else if (!strcmp(arg
, "protected"))
1889 default_visibility
= VISIBILITY_PROTECTED
;
1891 error ("unrecognized visibility value \"%s\"", arg
);
1896 flag_value_profile_transformations_set
= true;
1899 case OPT_frandom_seed
:
1900 /* The real switch is -fno-random-seed. */
1903 set_random_seed (NULL
);
1906 case OPT_frandom_seed_
:
1907 set_random_seed (arg
);
1910 case OPT_fselective_scheduling
:
1911 case OPT_fselective_scheduling2
:
1912 sel_sched_switch_set
= true;
1915 case OPT_fsched_verbose_
:
1916 #ifdef INSN_SCHEDULING
1917 fix_sched_param ("verbose", arg
);
1923 case OPT_fsched_stalled_insns_
:
1924 flag_sched_stalled_insns
= value
;
1925 if (flag_sched_stalled_insns
== 0)
1926 flag_sched_stalled_insns
= -1;
1929 case OPT_fsched_stalled_insns_dep_
:
1930 flag_sched_stalled_insns_dep
= value
;
1933 case OPT_fstack_check_
:
1934 if (!strcmp (arg
, "no"))
1935 flag_stack_check
= NO_STACK_CHECK
;
1936 else if (!strcmp (arg
, "generic"))
1937 /* This is the old stack checking method. */
1938 flag_stack_check
= STACK_CHECK_BUILTIN
1939 ? FULL_BUILTIN_STACK_CHECK
1940 : GENERIC_STACK_CHECK
;
1941 else if (!strcmp (arg
, "specific"))
1942 /* This is the new stack checking method. */
1943 flag_stack_check
= STACK_CHECK_BUILTIN
1944 ? FULL_BUILTIN_STACK_CHECK
1945 : STACK_CHECK_STATIC_BUILTIN
1946 ? STATIC_BUILTIN_STACK_CHECK
1947 : GENERIC_STACK_CHECK
;
1949 warning (0, "unknown stack check parameter \"%s\"", arg
);
1952 case OPT_fstack_check
:
1953 /* This is the same as the "specific" mode above. */
1955 flag_stack_check
= STACK_CHECK_BUILTIN
1956 ? FULL_BUILTIN_STACK_CHECK
1957 : STACK_CHECK_STATIC_BUILTIN
1958 ? STATIC_BUILTIN_STACK_CHECK
1959 : GENERIC_STACK_CHECK
;
1961 flag_stack_check
= NO_STACK_CHECK
;
1964 case OPT_fstack_limit
:
1965 /* The real switch is -fno-stack-limit. */
1968 stack_limit_rtx
= NULL_RTX
;
1971 case OPT_fstack_limit_register_
:
1973 int reg
= decode_reg_name (arg
);
1975 error ("unrecognized register name \"%s\"", arg
);
1977 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1981 case OPT_fstack_limit_symbol_
:
1982 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1985 case OPT_ftree_vectorizer_verbose_
:
1986 vect_set_verbosity_level (arg
);
1989 case OPT_ftls_model_
:
1990 if (!strcmp (arg
, "global-dynamic"))
1991 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
1992 else if (!strcmp (arg
, "local-dynamic"))
1993 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
1994 else if (!strcmp (arg
, "initial-exec"))
1995 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
1996 else if (!strcmp (arg
, "local-exec"))
1997 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
1999 warning (0, "unknown tls-model \"%s\"", arg
);
2002 case OPT_fira_algorithm_
:
2003 if (!strcmp (arg
, "CB"))
2004 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
2005 else if (!strcmp (arg
, "priority"))
2006 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
2008 warning (0, "unknown ira algorithm \"%s\"", arg
);
2011 case OPT_fira_region_
:
2012 if (!strcmp (arg
, "one"))
2013 flag_ira_region
= IRA_REGION_ONE
;
2014 else if (!strcmp (arg
, "all"))
2015 flag_ira_region
= IRA_REGION_ALL
;
2016 else if (!strcmp (arg
, "mixed"))
2017 flag_ira_region
= IRA_REGION_MIXED
;
2019 warning (0, "unknown ira region \"%s\"", arg
);
2022 case OPT_fira_verbose_
:
2023 flag_ira_verbose
= value
;
2027 flag_tracer_set
= true;
2031 flag_ipa_cp_set
= true;
2034 case OPT_fipa_cp_clone
:
2035 flag_ipa_cp_clone_set
= true;
2038 case OPT_fpredictive_commoning
:
2039 flag_predictive_commoning_set
= true;
2042 case OPT_funswitch_loops
:
2043 flag_unswitch_loops_set
= true;
2046 case OPT_fgcse_after_reload
:
2047 flag_gcse_after_reload_set
= true;
2050 case OPT_funroll_loops
:
2051 flag_unroll_loops_set
= true;
2055 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2059 set_debug_level (SDB_DEBUG
, false, arg
);
2063 if (value
< 2 || value
> 4)
2064 error ("dwarf version %d is not supported", value
);
2066 dwarf_version
= value
;
2067 set_debug_level (DWARF2_DEBUG
, false, "");
2071 set_debug_level (NO_DEBUG
, 2, arg
);
2076 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2080 set_debug_level (VMS_DEBUG
, false, arg
);
2085 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2089 asm_file_name
= arg
;
2092 case OPT_pedantic_errors
:
2093 flag_pedantic_errors
= pedantic
= 1;
2097 case OPT_fcse_skip_blocks
:
2098 case OPT_floop_optimize
:
2099 case OPT_frerun_loop_opt
:
2100 case OPT_fstrength_reduce
:
2101 case OPT_ftree_store_copy_prop
:
2102 case OPT_fforce_addr
:
2103 case OPT_ftree_salias
:
2104 case OPT_ftree_store_ccp
:
2105 /* These are no-ops, preserved for backward compatibility. */
2109 /* If the flag was handled in a standard way, assume the lack of
2110 processing here is intentional. */
2111 gcc_assert (cl_options
[scode
].flag_var
);
2118 /* Handle --param NAME=VALUE. */
2120 handle_param (const char *carg
)
2125 arg
= xstrdup (carg
);
2126 equal
= strchr (arg
, '=');
2128 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2131 value
= integral_argument (equal
+ 1);
2133 error ("invalid --param value %qs", equal
+ 1);
2137 set_param_value (arg
, value
);
2144 /* Used to set the level of strict aliasing warnings,
2145 when no level is specified (i.e., when -Wstrict-aliasing, and not
2146 -Wstrict-aliasing=level was given).
2147 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2148 and 0 otherwise. After calling this function, wstrict_aliasing will be
2149 set to the default value of -Wstrict_aliasing=level, currently 3. */
2151 set_Wstrict_aliasing (int onoff
)
2153 gcc_assert (onoff
== 0 || onoff
== 1);
2155 warn_strict_aliasing
= 3;
2157 warn_strict_aliasing
= 0;
2160 /* The following routines are useful in setting all the flags that
2161 -ffast-math and -fno-fast-math imply. */
2163 set_fast_math_flags (int set
)
2165 flag_unsafe_math_optimizations
= set
;
2166 set_unsafe_math_optimizations_flags (set
);
2167 flag_finite_math_only
= set
;
2168 flag_errno_math
= !set
;
2171 flag_signaling_nans
= 0;
2172 flag_rounding_math
= 0;
2173 flag_cx_limited_range
= 1;
2177 /* When -funsafe-math-optimizations is set the following
2178 flags are set as well. */
2180 set_unsafe_math_optimizations_flags (int set
)
2182 flag_trapping_math
= !set
;
2183 flag_signed_zeros
= !set
;
2184 flag_associative_math
= set
;
2185 flag_reciprocal_math
= set
;
2188 /* Return true iff flags are set as if -ffast-math. */
2190 fast_math_flags_set_p (void)
2192 return (!flag_trapping_math
2193 && flag_unsafe_math_optimizations
2194 && flag_finite_math_only
2195 && !flag_signed_zeros
2196 && !flag_errno_math
);
2199 /* Return true iff flags are set as if -ffast-math but using the flags stored
2200 in the struct cl_optimization structure. */
2202 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2204 return (!opt
->flag_trapping_math
2205 && opt
->flag_unsafe_math_optimizations
2206 && opt
->flag_finite_math_only
2207 && !opt
->flag_signed_zeros
2208 && !opt
->flag_errno_math
);
2211 /* Handle a debug output -g switch. EXTENDED is true or false to support
2212 extended output (2 is special and means "-ggdb" was given). */
2214 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2216 static bool type_explicit
;
2218 use_gnu_debug_info_extensions
= extended
;
2220 if (type
== NO_DEBUG
)
2222 if (write_symbols
== NO_DEBUG
)
2224 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2228 #ifdef DWARF2_DEBUGGING_INFO
2229 write_symbols
= DWARF2_DEBUG
;
2230 #elif defined DBX_DEBUGGING_INFO
2231 write_symbols
= DBX_DEBUG
;
2235 if (write_symbols
== NO_DEBUG
)
2236 warning (0, "target system does not support debug output");
2241 /* Does it conflict with an already selected type? */
2242 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2243 error ("debug format \"%s\" conflicts with prior selection",
2244 debug_type_names
[type
]);
2245 write_symbols
= type
;
2246 type_explicit
= true;
2249 /* A debug flag without a level defaults to level 2. */
2252 if (!debug_info_level
)
2253 debug_info_level
= DINFO_LEVEL_NORMAL
;
2257 int argval
= integral_argument (arg
);
2259 error ("unrecognised debug output level \"%s\"", arg
);
2260 else if (argval
> 3)
2261 error ("debug output level %s is too high", arg
);
2263 debug_info_level
= (enum debug_info_level
) argval
;
2267 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2268 a simple on-off switch. */
2271 option_enabled (int opt_idx
)
2273 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2275 if (option
->flag_var
)
2276 switch (option
->var_type
)
2279 return *(int *) option
->flag_var
!= 0;
2282 return *(int *) option
->flag_var
== option
->var_value
;
2284 case CLVC_BIT_CLEAR
:
2285 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2288 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2296 /* Fill STATE with the current state of option OPTION. Return true if
2297 there is some state to store. */
2300 get_option_state (int option
, struct cl_option_state
*state
)
2302 if (cl_options
[option
].flag_var
== 0)
2305 switch (cl_options
[option
].var_type
)
2309 state
->data
= cl_options
[option
].flag_var
;
2310 state
->size
= sizeof (int);
2313 case CLVC_BIT_CLEAR
:
2315 state
->ch
= option_enabled (option
);
2316 state
->data
= &state
->ch
;
2321 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2322 if (state
->data
== 0)
2324 state
->size
= strlen ((const char *) state
->data
) + 1;
2330 /* Enable a warning option as an error. This is used by -Werror= and
2331 also by legacy Werror-implicit-function-declaration. */
2334 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2339 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2340 new_option
[0] = 'W';
2341 strcpy (new_option
+ 1, arg
);
2342 option_index
= find_opt (new_option
, lang_mask
);
2343 if (option_index
== N_OPTS
)
2345 error ("-Werror=%s: No option -%s", arg
, new_option
);
2349 diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2350 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2352 /* -Werror=foo implies -Wfoo. */
2353 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2354 && cl_options
[option_index
].flag_var
2355 && kind
== DK_ERROR
)
2356 *(int *) cl_options
[option_index
].flag_var
= 1;