1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
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"
31 #include "langhooks.h"
37 #include "diagnostic.h"
38 #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
39 #include "insn-attr.h" /* For INSN_SCHEDULING. */
41 #include "tree-pass.h"
45 /* Value of the -G xx switch, and whether it was passed or not. */
46 unsigned HOST_WIDE_INT g_switch_value
;
49 /* True if we should exit after parsing options. */
50 bool exit_after_options
;
52 /* Print various extra warnings. -W/-Wextra. */
55 /* True to warn about any objects definitions whose size is larger
56 than N bytes. Also want about function definitions whose returned
57 values are larger than N bytes, where N is `larger_than_size'. */
58 bool warn_larger_than
;
59 HOST_WIDE_INT larger_than_size
;
61 /* True to warn about any function whose frame size is larger
63 bool warn_frame_larger_than
;
64 HOST_WIDE_INT frame_larger_than_size
;
66 /* Hack for cooperation between set_Wunused and set_Wextra. */
67 static bool maybe_warn_unused_parameter
;
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 #ifdef ENABLE_CHECKING
341 static const char undocumented_msg
[] = N_("This switch lacks documentation");
343 static const char undocumented_msg
[] = "";
346 /* Used for bookkeeping on whether user set these flags so
347 -fprofile-use/-fprofile-generate does not use them. */
348 static bool profile_arc_flag_set
, flag_profile_values_set
;
349 static bool flag_unroll_loops_set
, flag_tracer_set
;
350 static bool flag_value_profile_transformations_set
;
351 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
352 static bool flag_inline_functions_set
;
354 /* Functions excluded from profiling. */
356 typedef char *char_p
; /* For DEF_VEC_P. */
358 DEF_VEC_ALLOC_P(char_p
,heap
);
360 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
361 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
363 typedef const char *const_char_p
; /* For DEF_VEC_P. */
364 DEF_VEC_P(const_char_p
);
365 DEF_VEC_ALLOC_P(const_char_p
,heap
);
367 static VEC(const_char_p
,heap
) *ignored_options
;
369 /* Function calls disallowed under -Wdisallowed-function-list=... */
370 static VEC(char_p
,heap
) *warning_disallowed_functions
;
372 /* If -Wdisallowed-function-list=... */
373 bool warn_disallowed_functions
= false;
375 /* Input file names. */
376 const char **in_fnames
;
377 unsigned num_in_fnames
;
379 static int common_handle_option (size_t scode
, const char *arg
, int value
,
380 unsigned int lang_mask
);
381 static void handle_param (const char *);
382 static void set_Wextra (int);
383 static unsigned int handle_option (const char **argv
, unsigned int lang_mask
);
384 static char *write_langs (unsigned int lang_mask
);
385 static void complain_wrong_lang (const char *, const struct cl_option
*,
386 unsigned int lang_mask
);
387 static void handle_options (unsigned int, const char **, unsigned int);
388 static void set_debug_level (enum debug_info_type type
, int extended
,
391 /* If ARG is a non-negative integer made up solely of digits, return its
392 value, otherwise return -1. */
394 integral_argument (const char *arg
)
398 while (*p
&& ISDIGIT (*p
))
407 /* Return a malloced slash-separated list of languages in MASK. */
409 write_langs (unsigned int mask
)
411 unsigned int n
= 0, len
= 0;
412 const char *lang_name
;
415 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
416 if (mask
& (1U << n
))
417 len
+= strlen (lang_name
) + 1;
419 result
= XNEWVEC (char, len
);
421 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
422 if (mask
& (1U << n
))
426 strcpy (result
+ len
, lang_name
);
427 len
+= strlen (lang_name
);
435 /* Complain that switch OPT_INDEX does not apply to this front end. */
437 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
438 unsigned int lang_mask
)
440 char *ok_langs
, *bad_lang
;
442 ok_langs
= write_langs (option
->flags
);
443 bad_lang
= write_langs (lang_mask
);
445 /* Eventually this should become a hard error IMO. */
446 warning (0, "command line option \"%s\" is valid for %s but not for %s",
447 text
, ok_langs
, bad_lang
);
453 /* Buffer the unknown option described by the string OPT. Currently,
454 we only complain about unknown -Wno-* options if they may have
455 prevented a diagnostic. Otherwise, we just ignore them.
456 Note that if we do complain, it is only as a warning, not an error;
457 passing the compiler an unrecognised -Wno-* option should never
458 change whether the compilation succeeds or fails. */
460 static void postpone_unknown_option_warning(const char *opt
)
462 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
465 /* Produce a warning for each option previously buffered. */
467 void print_ignored_options (void)
469 location_t saved_loc
= input_location
;
473 while (!VEC_empty (const_char_p
, ignored_options
))
476 opt
= VEC_pop (const_char_p
, ignored_options
);
477 warning (0, "unrecognized command line option \"%s\"", opt
);
480 input_location
= saved_loc
;
483 /* Handle the switch beginning at ARGV for the language indicated by
484 LANG_MASK. Returns the number of switches consumed. */
486 handle_option (const char **argv
, unsigned int lang_mask
)
489 const char *opt
, *arg
= 0;
492 unsigned int result
= 0;
493 const struct cl_option
*option
;
497 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
498 if (opt_index
== cl_options_count
499 && (opt
[1] == 'W' || opt
[1] == 'f' || opt
[1] == 'm')
500 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
502 /* Drop the "no-" from negative switches. */
503 size_t len
= strlen (opt
) - 3;
505 dup
= XNEWVEC (char, len
+ 1);
508 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
511 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
512 if (opt_index
== cl_options_count
&& opt
[1] == 'W')
514 /* We don't generate warnings for unknown -Wno-* options
515 unless we issue diagnostics. */
516 postpone_unknown_option_warning (argv
[0]);
522 if (opt_index
== cl_options_count
)
525 option
= &cl_options
[opt_index
];
527 /* Reject negative form of switches that don't take negatives as
529 if (!value
&& (option
->flags
& CL_REJECT_NEGATIVE
))
532 /* We've recognized this switch. */
535 /* Check to see if the option is disabled for this configuration. */
536 if (option
->flags
& CL_DISABLED
)
538 error ("command line option %qs"
539 " is not supported by this configuration", opt
);
543 /* Sort out any argument the switch takes. */
544 if (option
->flags
& CL_JOINED
)
546 /* Have arg point to the original switch. This is because
547 some code, such as disable_builtin_function, expects its
548 argument to be persistent until the program exits. */
549 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
551 arg
+= strlen ("no-");
553 if (*arg
== '\0' && !(option
->flags
& CL_MISSING_OK
))
555 if (option
->flags
& CL_SEPARATE
)
561 /* Missing argument. */
565 else if (option
->flags
& CL_SEPARATE
)
571 /* Now we've swallowed any potential argument, complain if this
572 is a switch for a different front end. */
573 if (!(option
->flags
& (lang_mask
| CL_COMMON
| CL_TARGET
)))
575 complain_wrong_lang (argv
[0], option
, lang_mask
);
578 else if ((option
->flags
& CL_TARGET
)
579 && (option
->flags
& CL_LANG_ALL
)
580 && !(option
->flags
& lang_mask
))
582 /* Complain for target flag language mismatches if any languages
584 complain_wrong_lang (argv
[0], option
, lang_mask
);
588 if (arg
== NULL
&& (option
->flags
& (CL_JOINED
| CL_SEPARATE
)))
590 if (!lang_hooks
.missing_argument (opt
, opt_index
))
591 error ("missing argument to \"%s\"", opt
);
595 /* If the switch takes an integer, convert it. */
596 if (arg
&& (option
->flags
& CL_UINTEGER
))
598 value
= integral_argument (arg
);
601 error ("argument to \"%s\" should be a non-negative integer",
607 if (option
->flag_var
)
608 switch (option
->var_type
)
611 *(int *) option
->flag_var
= value
;
615 *(int *) option
->flag_var
= (value
617 : !option
->var_value
);
622 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
623 *(int *) option
->flag_var
|= option
->var_value
;
625 *(int *) option
->flag_var
&= ~option
->var_value
;
626 if (option
->flag_var
== &target_flags
)
627 target_flags_explicit
|= option
->var_value
;
631 *(const char **) option
->flag_var
= arg
;
635 if (option
->flags
& lang_mask
)
636 if (lang_hooks
.handle_option (opt_index
, arg
, value
) == 0)
639 if (result
&& (option
->flags
& CL_COMMON
))
640 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
643 if (result
&& (option
->flags
& CL_TARGET
))
644 if (!targetm
.handle_option (opt_index
, arg
, value
))
653 /* Handle FILENAME from the command line. */
655 add_input_filename (const char *filename
)
658 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
659 in_fnames
[num_in_fnames
- 1] = filename
;
662 /* Add comma-separated strings to a char_p vector. */
665 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
672 /* We never free this string. */
685 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
688 if (*r
== '\\' && r
[1] == ',')
696 if (*token_start
!= '\0')
697 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
700 /* Return whether we should exclude FNDECL from instrumentation. */
703 flag_instrument_functions_exclude_p (tree fndecl
)
705 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
711 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
713 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
717 if (strstr (name
, s
) != NULL
)
722 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
728 name
= DECL_SOURCE_FILE (fndecl
);
730 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
733 if (strstr (name
, s
) != NULL
)
742 /* Return whether this function call is disallowed. */
744 warn_if_disallowed_function_p (const_tree exp
)
746 if (TREE_CODE(exp
) == CALL_EXPR
747 && VEC_length (char_p
, warning_disallowed_functions
) > 0)
752 IDENTIFIER_POINTER (DECL_NAME (get_callee_fndecl (exp
)));
753 for (i
= 0; VEC_iterate (char_p
, warning_disallowed_functions
, i
, s
);
756 if (strcmp (fnname
, s
) == 0)
758 warning (OPT_Wdisallowed_function_list_
,
759 "disallowed call to %qs", fnname
);
766 /* Decode and handle the vector of command line options. LANG_MASK
767 contains has a single bit set representing the current
770 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
774 for (i
= 1; i
< argc
; i
+= n
)
776 const char *opt
= argv
[i
];
778 /* Interpret "-" or a non-switch as a file name. */
779 if (opt
[0] != '-' || opt
[1] == '\0')
781 if (main_input_filename
== NULL
)
783 main_input_filename
= opt
;
784 main_input_baselength
785 = base_of_path (main_input_filename
, &main_input_basename
);
787 add_input_filename (opt
);
792 n
= handle_option (argv
+ i
, lang_mask
);
797 error ("unrecognized command line option \"%s\"", opt
);
802 /* Parse command line options and set default flag values. Do minimal
803 options processing. */
805 decode_options (unsigned int argc
, const char **argv
)
807 static bool first_time_p
= true;
808 static int initial_max_aliased_vops
;
809 static int initial_avg_aliased_vops
;
810 static int initial_min_crossjump_insns
;
811 static int initial_max_fields_for_field_sensitive
;
812 static unsigned int initial_lang_mask
;
814 unsigned int i
, lang_mask
;
822 /* Perform language-specific options initialization. */
823 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
825 lang_hooks
.initialize_diagnostics (global_dc
);
827 /* Save initial values of parameters we reset. */
828 initial_max_aliased_vops
= MAX_ALIASED_VOPS
;
829 initial_avg_aliased_vops
= AVG_ALIASED_VOPS
;
830 initial_min_crossjump_insns
831 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
832 initial_max_fields_for_field_sensitive
833 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
836 lang_mask
= initial_lang_mask
;
838 /* Scan to see what optimization level has been specified. That will
839 determine the default value of many flags. */
840 for (i
= 1; i
< argc
; i
++)
842 if (!strcmp (argv
[i
], "-O"))
847 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
849 /* Handle -Os, -O2, -O3, -O69, ... */
850 const char *p
= &argv
[i
][2];
852 if ((p
[0] == 's') && (p
[1] == 0))
856 /* Optimizing for size forces optimize to be 2. */
861 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
862 if (optimize_val
!= -1)
864 optimize
= optimize_val
;
871 if (!flag_unit_at_a_time
)
873 flag_section_anchors
= 0;
874 flag_toplevel_reorder
= 0;
876 if (!flag_toplevel_reorder
)
878 if (flag_section_anchors
== 1)
879 error ("Section anchors must be disabled when toplevel reorder is disabled.");
880 flag_section_anchors
= 0;
883 /* Originally we just set the variables if a particular optimization level,
884 but with the advent of being able to change the optimization level for a
885 function, we need to reset optimizations. */
888 flag_merge_constants
= 0;
890 /* We disable toplevel reordering at -O0 to disable transformations that
891 might be surprising to end users and to get -fno-toplevel-reorder
892 tested, but we keep section anchors. */
893 if (flag_toplevel_reorder
== 2)
894 flag_toplevel_reorder
= 0;
897 flag_merge_constants
= 1;
899 /* -O1 optimizations. */
900 opt1
= (optimize
>= 1);
901 flag_defer_pop
= opt1
;
903 flag_delayed_branch
= opt1
;
905 #ifdef CAN_DEBUG_WITHOUT_FP
906 flag_omit_frame_pointer
= opt1
;
908 flag_guess_branch_prob
= opt1
;
909 flag_cprop_registers
= opt1
;
910 flag_if_conversion
= opt1
;
911 flag_if_conversion2
= opt1
;
912 flag_ipa_pure_const
= opt1
;
913 flag_ipa_reference
= opt1
;
914 flag_split_wide_types
= opt1
;
915 flag_tree_ccp
= opt1
;
916 flag_tree_dce
= opt1
;
917 flag_tree_dom
= opt1
;
918 flag_tree_dse
= opt1
;
919 flag_tree_ter
= opt1
;
920 flag_tree_sra
= opt1
;
921 flag_tree_copyrename
= opt1
;
922 flag_tree_fre
= opt1
;
923 flag_tree_copy_prop
= opt1
;
924 flag_tree_sink
= opt1
;
927 /* -O2 optimizations. */
928 opt2
= (optimize
>= 2);
929 flag_inline_small_functions
= opt2
;
930 flag_indirect_inlining
= opt2
;
931 flag_thread_jumps
= opt2
;
932 flag_crossjumping
= opt2
;
933 flag_optimize_sibling_calls
= opt2
;
934 flag_forward_propagate
= opt2
;
935 flag_cse_follow_jumps
= opt2
;
937 flag_expensive_optimizations
= opt2
;
938 flag_rerun_cse_after_loop
= opt2
;
939 flag_caller_saves
= opt2
;
940 flag_peephole2
= opt2
;
941 #ifdef INSN_SCHEDULING
942 flag_schedule_insns
= opt2
;
943 flag_schedule_insns_after_reload
= opt2
;
946 flag_strict_aliasing
= opt2
;
947 flag_strict_overflow
= opt2
;
948 flag_delete_null_pointer_checks
= opt2
;
949 flag_reorder_blocks
= opt2
;
950 flag_reorder_functions
= opt2
;
951 flag_tree_store_ccp
= opt2
;
952 flag_tree_vrp
= opt2
;
953 flag_tree_builtin_call_dce
= opt2
;
954 flag_tree_pre
= opt2
;
955 flag_tree_switch_conversion
= 1;
957 /* Allow more virtual operators to increase alias precision. */
959 set_param_value ("max-aliased-vops",
960 (opt2
) ? 500 : initial_max_aliased_vops
);
962 /* Track fields in field-sensitive alias analysis. */
963 set_param_value ("max-fields-for-field-sensitive",
964 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
966 /* -O3 optimizations. */
967 opt3
= (optimize
>= 3);
968 flag_predictive_commoning
= opt3
;
969 flag_inline_functions
= opt3
;
970 flag_unswitch_loops
= opt3
;
971 flag_gcse_after_reload
= opt3
;
972 flag_tree_vectorize
= opt3
;
974 /* Allow even more virtual operators. Max-aliased-vops was set above for
975 -O2, so don't reset it unless we are at -O3. */
977 set_param_value ("max-aliased-vops", 1000);
979 set_param_value ("avg-aliased-vops", (opt3
) ? 3 : initial_avg_aliased_vops
);
981 /* Just -O1/-O0 optimizations. */
982 opt1_max
= (optimize
<= 1);
983 align_loops
= opt1_max
;
984 align_jumps
= opt1_max
;
985 align_labels
= opt1_max
;
986 align_functions
= opt1_max
;
990 /* Loop header copying usually increases size of the code. This used not to
991 be true, since quite often it is possible to verify that the condition is
992 satisfied in the first iteration and therefore to eliminate it. Jump
993 threading handles these cases now. */
996 /* Conditional DCE generates bigger code. */
997 flag_tree_builtin_call_dce
= 0;
999 /* PRE tends to generate bigger code. */
1002 /* These options are set with -O3, so reset for -Os */
1003 flag_predictive_commoning
= 0;
1004 flag_inline_functions
= 0;
1005 flag_unswitch_loops
= 0;
1006 flag_gcse_after_reload
= 0;
1007 flag_tree_vectorize
= 0;
1009 /* Don't reorder blocks when optimizing for size because extra jump insns may
1010 be created; also barrier may create extra padding.
1012 More correctly we should have a block reordering mode that tried to
1013 minimize the combined size of all the jumps. This would more or less
1014 automatically remove extra jumps, but would also try to use more short
1015 jumps instead of long jumps. */
1016 flag_reorder_blocks
= 0;
1017 flag_reorder_blocks_and_partition
= 0;
1019 /* Inlining of functions reducing size is a good idea regardless of them
1020 being declared inline. */
1021 flag_inline_functions
= 1;
1023 /* Don't align code. */
1027 align_functions
= 1;
1029 /* Unroll/prefetch switches that may be set on the command line, and tend to
1030 generate bigger code. */
1031 flag_unroll_loops
= 0;
1032 flag_unroll_all_loops
= 0;
1033 flag_prefetch_loop_arrays
= 0;
1035 /* Basic optimization options. */
1040 /* We want to crossjump as much as possible. */
1041 set_param_value ("min-crossjump-insns", 1);
1044 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
1048 /* Initialize whether `char' is signed. */
1049 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
1050 /* Set this to a special "uninitialized" value. The actual default is
1051 set after target options have been processed. */
1052 flag_short_enums
= 2;
1054 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
1056 target_flags
= targetm
.default_target_flags
;
1058 /* Some targets have ABI-specified unwind tables. */
1059 flag_unwind_tables
= targetm
.unwind_tables_default
;
1062 #ifdef OPTIMIZATION_OPTIONS
1063 /* Allow default optimizations to be specified on a per-machine basis. */
1064 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
1067 handle_options (argc
, argv
, lang_mask
);
1072 flag_pic
= flag_pie
;
1073 if (flag_pic
&& !flag_pie
)
1079 /* Inlining does not work if not optimizing,
1080 so force it not to be done. */
1084 /* The c_decode_option function and decode_option hook set
1085 this to `2' if -Wall is used, so we can avoid giving out
1086 lots of errors for people who don't realize what -Wall does. */
1087 if (warn_uninitialized
== 1)
1088 warning (OPT_Wuninitialized
,
1089 "-Wuninitialized is not supported without -O");
1092 /* The optimization to partition hot and cold basic blocks into separate
1093 sections of the .o and executable files does not work (currently)
1094 with exception handling. This is because there is no support for
1095 generating unwind info. If flag_exceptions is turned on we need to
1096 turn off the partitioning optimization. */
1098 if (flag_exceptions
&& flag_reorder_blocks_and_partition
)
1101 ("-freorder-blocks-and-partition does not work with exceptions");
1102 flag_reorder_blocks_and_partition
= 0;
1103 flag_reorder_blocks
= 1;
1106 /* If user requested unwind info, then turn off the partitioning
1109 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1110 && flag_reorder_blocks_and_partition
)
1112 inform ("-freorder-blocks-and-partition does not support unwind info");
1113 flag_reorder_blocks_and_partition
= 0;
1114 flag_reorder_blocks
= 1;
1117 /* If the target requested unwind info, then turn off the partitioning
1118 optimization with a different message. Likewise, if the target does not
1119 support named sections. */
1121 if (flag_reorder_blocks_and_partition
1122 && (!targetm
.have_named_sections
1123 || (flag_unwind_tables
&& targetm
.unwind_tables_default
)))
1126 ("-freorder-blocks-and-partition does not work on this architecture");
1127 flag_reorder_blocks_and_partition
= 0;
1128 flag_reorder_blocks
= 1;
1131 /* Save the current optimization options if this is the first call. */
1134 optimization_default_node
= build_optimization_node ();
1135 optimization_current_node
= optimization_default_node
;
1136 first_time_p
= false;
1140 #define LEFT_COLUMN 27
1142 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1143 followed by word-wrapped HELP in a second column. */
1145 wrap_help (const char *help
,
1147 unsigned int item_width
,
1148 unsigned int columns
)
1150 unsigned int col_width
= LEFT_COLUMN
;
1151 unsigned int remaining
, room
, len
;
1153 remaining
= strlen (help
);
1157 room
= columns
- 3 - MAX (col_width
, item_width
);
1166 for (i
= 0; help
[i
]; i
++)
1168 if (i
>= room
&& len
!= remaining
)
1172 else if ((help
[i
] == '-' || help
[i
] == '/')
1173 && help
[i
+ 1] != ' '
1174 && i
> 0 && ISALPHA (help
[i
- 1]))
1179 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1181 while (help
[len
] == ' ')
1189 /* Print help for a specific front-end, etc. */
1191 print_filtered_help (unsigned int include_flags
,
1192 unsigned int exclude_flags
,
1193 unsigned int any_flags
,
1194 unsigned int columns
)
1198 static char *printed
= NULL
;
1200 bool displayed
= false;
1202 if (include_flags
== CL_PARAMS
)
1204 for (i
= 0; i
< LAST_PARAM
; i
++)
1206 const char *param
= compiler_params
[i
].option
;
1208 help
= compiler_params
[i
].help
;
1209 if (help
== NULL
|| *help
== '\0')
1211 if (exclude_flags
& CL_UNDOCUMENTED
)
1213 help
= undocumented_msg
;
1216 /* Get the translation. */
1219 wrap_help (help
, param
, strlen (param
), columns
);
1226 printed
= XCNEWVAR (char, cl_options_count
);
1228 for (i
= 0; i
< cl_options_count
; i
++)
1230 static char new_help
[128];
1231 const struct cl_option
*option
= cl_options
+ i
;
1236 if (include_flags
== 0
1237 || ((option
->flags
& include_flags
) != include_flags
))
1239 if ((option
->flags
& any_flags
) == 0)
1243 /* Skip unwanted switches. */
1244 if ((option
->flags
& exclude_flags
) != 0)
1248 /* Skip switches that have already been printed. */
1254 help
= option
->help
;
1257 if (exclude_flags
& CL_UNDOCUMENTED
)
1259 help
= undocumented_msg
;
1262 /* Get the translation. */
1265 /* Find the gap between the name of the
1266 option and its descriptive text. */
1267 tab
= strchr (help
, '\t');
1276 opt
= option
->opt_text
;
1280 /* With the -Q option enabled we change the descriptive text associated
1281 with an option to be an indication of its current setting. */
1284 if (len
< (LEFT_COLUMN
+ 2))
1285 strcpy (new_help
, "\t\t");
1287 strcpy (new_help
, "\t");
1289 if (option
->flag_var
!= NULL
)
1291 if (option
->flags
& CL_JOINED
)
1293 if (option
->var_type
== CLVC_STRING
)
1295 if (* (const char **) option
->flag_var
!= NULL
)
1296 snprintf (new_help
+ strlen (new_help
),
1297 sizeof (new_help
) - strlen (new_help
),
1298 * (const char **) option
->flag_var
);
1301 sprintf (new_help
+ strlen (new_help
),
1302 "%#x", * (int *) option
->flag_var
);
1305 strcat (new_help
, option_enabled (i
)
1306 ? _("[enabled]") : _("[disabled]"));
1312 wrap_help (help
, opt
, len
, columns
);
1318 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1321 printf (_(" No options with the desired characteristics were found\n"));
1326 /* PR 31349: Tell the user how to see all of the
1327 options supported by a specific front end. */
1328 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1329 if ((1U << i
) & langs
)
1330 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1331 lang_names
[i
], lang_names
[i
]);
1335 else if (! displayed
)
1336 printf (_(" All options with the desired characteristics have already been displayed\n"));
1341 /* Display help for a specified type of option.
1342 The options must have ALL of the INCLUDE_FLAGS set
1343 ANY of the flags in the ANY_FLAGS set
1344 and NONE of the EXCLUDE_FLAGS set. */
1346 print_specific_help (unsigned int include_flags
,
1347 unsigned int exclude_flags
,
1348 unsigned int any_flags
)
1350 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1351 const char * description
= NULL
;
1352 const char * descrip_extra
= "";
1355 static unsigned int columns
= 0;
1357 /* Sanity check: Make sure that we do not have more
1358 languages than we have bits available to enumerate them. */
1359 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1361 /* If we have not done so already, obtain
1362 the desired maximum width of the output. */
1367 GET_ENVIRONMENT (p
, "COLUMNS");
1370 int value
= atoi (p
);
1377 /* Use a reasonable default. */
1381 /* Decide upon the title for the options that we are going to display. */
1382 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1384 switch (flag
& include_flags
)
1390 description
= _("The following options are target specific");
1393 description
= _("The following options control compiler warning messages");
1395 case CL_OPTIMIZATION
:
1396 description
= _("The following options control optimizations");
1399 description
= _("The following options are language-independent");
1402 description
= _("The --param option recognizes the following as parameters");
1405 if (i
>= cl_lang_count
)
1407 if ((exclude_flags
& ((1U << cl_lang_count
) - 1)) != 0)
1408 description
= _("The following options are specific to just the language ");
1410 description
= _("The following options are supported by the language ");
1411 descrip_extra
= lang_names
[i
];
1416 if (description
== NULL
)
1420 if (include_flags
== CL_UNDOCUMENTED
)
1421 description
= _("The following options are not documented");
1424 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1431 if (any_flags
& all_langs_mask
)
1432 description
= _("The following options are language-related");
1434 description
= _("The following options are language-independent");
1438 printf ("%s%s:\n", description
, descrip_extra
);
1439 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1442 /* Handle target- and language-independent options. Return zero to
1443 generate an "unknown option" message. Only options that need
1444 extra handling need to be listed here; if you simply want
1445 VALUE assigned to a variable, it happens automatically. */
1448 common_handle_option (size_t scode
, const char *arg
, int value
,
1449 unsigned int lang_mask
)
1451 static bool verbose
= false;
1452 enum opt_code code
= (enum opt_code
) scode
;
1467 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1468 unsigned int undoc_mask
;
1471 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1472 /* First display any single language specific options. */
1473 for (i
= 0; i
< cl_lang_count
; i
++)
1475 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1476 /* Next display any multi language specific options. */
1477 print_specific_help (0, undoc_mask
, all_langs_mask
);
1478 /* Then display any remaining, non-language options. */
1479 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1480 print_specific_help (i
, undoc_mask
, 0);
1481 exit_after_options
= true;
1485 case OPT_ftarget_help
:
1486 case OPT__target_help
:
1487 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1488 exit_after_options
= true;
1490 /* Allow the target a chance to give the user some additional information. */
1491 if (targetm
.target_help
)
1492 targetm
.target_help ();
1498 const char * a
= arg
;
1499 unsigned int include_flags
= 0;
1500 /* Note - by default we include undocumented options when listing
1501 specific classes. If you only want to see documented options
1502 then add ",^undocumented" to the --help= option. E.g.:
1504 --help=target,^undocumented */
1505 unsigned int exclude_flags
= 0;
1507 /* Walk along the argument string, parsing each word in turn.
1509 arg = [^]{word}[,{arg}]
1510 word = {optimizers|target|warnings|undocumented|
1511 params|common|<language>} */
1516 const char * string
;
1521 { "optimizers", CL_OPTIMIZATION
},
1522 { "target", CL_TARGET
},
1523 { "warnings", CL_WARNING
},
1524 { "undocumented", CL_UNDOCUMENTED
},
1525 { "params", CL_PARAMS
},
1526 { "joined", CL_JOINED
},
1527 { "separate", CL_SEPARATE
},
1528 { "common", CL_COMMON
},
1531 unsigned int * pflags
;
1533 unsigned int lang_flag
, specific_flag
;
1540 pflags
= & exclude_flags
;
1543 pflags
= & include_flags
;
1545 comma
= strchr (a
, ',');
1551 /* Check to see if the string matches an option class name. */
1552 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1553 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1555 specific_flag
= specifics
[i
].flag
;
1559 /* Check to see if the string matches a language name.
1560 Note - we rely upon the alpha-sorted nature of the entries in
1561 the lang_names array, specifically that shorter names appear
1562 before their longer variants. (i.e. C before C++). That way
1563 when we are attempting to match --help=c for example we will
1564 match with C first and not C++. */
1565 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1566 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1568 lang_flag
= 1U << i
;
1572 if (specific_flag
!= 0)
1575 * pflags
|= specific_flag
;
1578 /* The option's argument matches both the start of a
1579 language name and the start of an option class name.
1580 We have a special case for when the user has
1581 specified "--help=c", but otherwise we have to issue
1583 if (strncasecmp (a
, "c", len
) == 0)
1584 * pflags
|= lang_flag
;
1587 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1591 else if (lang_flag
!= 0)
1592 * pflags
|= lang_flag
;
1595 "warning: unrecognized argument to --help= option: %.*s\n",
1604 print_specific_help (include_flags
, exclude_flags
, 0);
1605 exit_after_options
= true;
1610 print_version (stderr
, "");
1611 exit_after_options
= true;
1615 g_switch_value
= value
;
1616 g_switch_set
= true;
1621 /* Currently handled in a prescan. */
1625 /* For backward compatibility, -W is the same as -Wextra. */
1629 case OPT_Wdisallowed_function_list_
:
1630 warn_disallowed_functions
= true;
1631 add_comma_separated_to_vector
1632 (&warning_disallowed_functions
, arg
);
1636 enable_warning_as_error (arg
, value
, lang_mask
);
1643 case OPT_Wlarger_than_
:
1644 /* This form corresponds to -Wlarger-than-.
1645 Kept for backward compatibility.
1646 Don't use it as the first argument of warning(). */
1648 case OPT_Wlarger_than_eq
:
1649 larger_than_size
= value
;
1650 warn_larger_than
= value
!= -1;
1653 case OPT_Wframe_larger_than_
:
1654 frame_larger_than_size
= value
;
1655 warn_frame_larger_than
= value
!= -1;
1658 case OPT_Wstrict_aliasing
:
1659 set_Wstrict_aliasing (value
);
1662 case OPT_Wstrict_aliasing_
:
1663 warn_strict_aliasing
= value
;
1666 case OPT_Wstrict_overflow
:
1667 warn_strict_overflow
= (value
1668 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1672 case OPT_Wstrict_overflow_
:
1673 warn_strict_overflow
= value
;
1677 set_Wunused (value
);
1682 aux_info_file_name
= arg
;
1683 flag_gen_aux_info
= 1;
1687 aux_base_name
= arg
;
1690 case OPT_auxbase_strip
:
1692 char *tmp
= xstrdup (arg
);
1693 strip_off_ending (tmp
, strlen (tmp
));
1695 aux_base_name
= tmp
;
1700 decode_d_option (arg
);
1704 dump_base_name
= arg
;
1707 case OPT_falign_functions_
:
1708 align_functions
= value
;
1711 case OPT_falign_jumps_
:
1712 align_jumps
= value
;
1715 case OPT_falign_labels_
:
1716 align_labels
= value
;
1719 case OPT_falign_loops_
:
1720 align_loops
= value
;
1723 case OPT_fbranch_probabilities
:
1724 flag_branch_probabilities_set
= true;
1727 case OPT_fcall_used_
:
1728 fix_register (arg
, 0, 1);
1731 case OPT_fcall_saved_
:
1732 fix_register (arg
, 0, 0);
1736 dbg_cnt_process_opt (arg
);
1739 case OPT_fdbg_cnt_list
:
1740 dbg_cnt_list_all_counters ();
1743 case OPT_fdebug_prefix_map_
:
1744 add_debug_prefix_map (arg
);
1747 case OPT_fdiagnostics_show_location_
:
1748 if (!strcmp (arg
, "once"))
1749 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1750 else if (!strcmp (arg
, "every-line"))
1751 diagnostic_prefixing_rule (global_dc
)
1752 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1757 case OPT_fdiagnostics_show_option
:
1758 global_dc
->show_option_requested
= true;
1762 if (!dump_switch_p (arg
))
1766 case OPT_ffast_math
:
1767 set_fast_math_flags (value
);
1770 case OPT_funsafe_math_optimizations
:
1771 set_unsafe_math_optimizations_flags (value
);
1775 fix_register (arg
, 1, 1);
1778 case OPT_finline_limit_
:
1779 case OPT_finline_limit_eq
:
1780 set_param_value ("max-inline-insns-single", value
/ 2);
1781 set_param_value ("max-inline-insns-auto", value
/ 2);
1784 case OPT_finstrument_functions_exclude_function_list_
:
1785 add_comma_separated_to_vector
1786 (&flag_instrument_functions_exclude_functions
, arg
);
1789 case OPT_finstrument_functions_exclude_file_list_
:
1790 add_comma_separated_to_vector
1791 (&flag_instrument_functions_exclude_files
, arg
);
1794 case OPT_fmessage_length_
:
1795 pp_set_line_maximum_length (global_dc
->printer
, value
);
1798 case OPT_fpack_struct_
:
1799 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1800 error ("structure alignment must be a small power of two, not %d", value
);
1803 initial_max_fld_align
= value
;
1804 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1808 case OPT_fpeel_loops
:
1809 flag_peel_loops_set
= true;
1812 case OPT_fprofile_arcs
:
1813 profile_arc_flag_set
= true;
1816 case OPT_finline_functions
:
1817 flag_inline_functions_set
= true;
1820 case OPT_fprofile_dir_
:
1821 profile_data_prefix
= xstrdup (arg
);
1824 case OPT_fprofile_use_
:
1825 profile_data_prefix
= xstrdup (arg
);
1826 flag_profile_use
= true;
1828 /* No break here - do -fprofile-use processing. */
1829 case OPT_fprofile_use
:
1830 if (!flag_branch_probabilities_set
)
1831 flag_branch_probabilities
= value
;
1832 if (!flag_profile_values_set
)
1833 flag_profile_values
= value
;
1834 if (!flag_unroll_loops_set
)
1835 flag_unroll_loops
= value
;
1836 if (!flag_peel_loops_set
)
1837 flag_peel_loops
= value
;
1838 if (!flag_tracer_set
)
1839 flag_tracer
= value
;
1840 if (!flag_value_profile_transformations_set
)
1841 flag_value_profile_transformations
= value
;
1842 if (!flag_inline_functions_set
)
1843 flag_inline_functions
= value
;
1846 case OPT_fprofile_generate_
:
1847 profile_data_prefix
= xstrdup (arg
);
1849 /* No break here - do -fprofile-generate processing. */
1850 case OPT_fprofile_generate
:
1851 if (!profile_arc_flag_set
)
1852 profile_arc_flag
= value
;
1853 if (!flag_profile_values_set
)
1854 flag_profile_values
= value
;
1855 if (!flag_value_profile_transformations_set
)
1856 flag_value_profile_transformations
= value
;
1857 if (!flag_inline_functions_set
)
1858 flag_inline_functions
= value
;
1861 case OPT_fprofile_values
:
1862 flag_profile_values_set
= true;
1865 case OPT_fvisibility_
:
1867 if (!strcmp(arg
, "default"))
1868 default_visibility
= VISIBILITY_DEFAULT
;
1869 else if (!strcmp(arg
, "internal"))
1870 default_visibility
= VISIBILITY_INTERNAL
;
1871 else if (!strcmp(arg
, "hidden"))
1872 default_visibility
= VISIBILITY_HIDDEN
;
1873 else if (!strcmp(arg
, "protected"))
1874 default_visibility
= VISIBILITY_PROTECTED
;
1876 error ("unrecognized visibility value \"%s\"", arg
);
1881 flag_value_profile_transformations_set
= true;
1884 case OPT_frandom_seed
:
1885 /* The real switch is -fno-random-seed. */
1888 set_random_seed (NULL
);
1891 case OPT_frandom_seed_
:
1892 set_random_seed (arg
);
1895 case OPT_fsched_verbose_
:
1896 #ifdef INSN_SCHEDULING
1897 fix_sched_param ("verbose", arg
);
1903 case OPT_fsched_stalled_insns_
:
1904 flag_sched_stalled_insns
= value
;
1905 if (flag_sched_stalled_insns
== 0)
1906 flag_sched_stalled_insns
= -1;
1909 case OPT_fsched_stalled_insns_dep_
:
1910 flag_sched_stalled_insns_dep
= value
;
1913 case OPT_fstack_limit
:
1914 /* The real switch is -fno-stack-limit. */
1917 stack_limit_rtx
= NULL_RTX
;
1920 case OPT_fstack_limit_register_
:
1922 int reg
= decode_reg_name (arg
);
1924 error ("unrecognized register name \"%s\"", arg
);
1926 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1930 case OPT_fstack_limit_symbol_
:
1931 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1934 case OPT_ftree_vectorizer_verbose_
:
1935 vect_set_verbosity_level (arg
);
1938 case OPT_ftls_model_
:
1939 if (!strcmp (arg
, "global-dynamic"))
1940 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
1941 else if (!strcmp (arg
, "local-dynamic"))
1942 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
1943 else if (!strcmp (arg
, "initial-exec"))
1944 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
1945 else if (!strcmp (arg
, "local-exec"))
1946 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
1948 warning (0, "unknown tls-model \"%s\"", arg
);
1952 flag_tracer_set
= true;
1955 case OPT_funroll_loops
:
1956 flag_unroll_loops_set
= true;
1960 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
1964 set_debug_level (SDB_DEBUG
, false, arg
);
1968 set_debug_level (DWARF2_DEBUG
, false, arg
);
1972 set_debug_level (NO_DEBUG
, 2, arg
);
1977 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
1981 set_debug_level (VMS_DEBUG
, false, arg
);
1986 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
1990 asm_file_name
= arg
;
1993 case OPT_pedantic_errors
:
1994 flag_pedantic_errors
= pedantic
= 1;
1997 case OPT_floop_optimize
:
1998 case OPT_frerun_loop_opt
:
1999 case OPT_fstrength_reduce
:
2000 case OPT_ftree_store_copy_prop
:
2001 case OPT_fforce_addr
:
2002 case OPT_ftree_salias
:
2003 /* These are no-ops, preserved for backward compatibility. */
2007 /* If the flag was handled in a standard way, assume the lack of
2008 processing here is intentional. */
2009 gcc_assert (cl_options
[scode
].flag_var
);
2016 /* Handle --param NAME=VALUE. */
2018 handle_param (const char *carg
)
2023 arg
= xstrdup (carg
);
2024 equal
= strchr (arg
, '=');
2026 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2029 value
= integral_argument (equal
+ 1);
2031 error ("invalid --param value %qs", equal
+ 1);
2035 set_param_value (arg
, value
);
2042 /* Handle -W and -Wextra. */
2044 set_Wextra (int setting
)
2046 extra_warnings
= setting
;
2047 warn_unused_parameter
= (setting
&& maybe_warn_unused_parameter
);
2049 /* We save the value of warn_uninitialized, since if they put
2050 -Wuninitialized on the command line, we need to generate a
2051 warning about not using it without also specifying -O. */
2053 warn_uninitialized
= 0;
2054 else if (warn_uninitialized
!= 1)
2055 warn_uninitialized
= 2;
2058 /* Initialize unused warning flags. */
2060 set_Wunused (int setting
)
2062 warn_unused_function
= setting
;
2063 warn_unused_label
= setting
;
2064 /* Unused function parameter warnings are reported when either
2065 ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified.
2066 Thus, if -Wextra has already been seen, set warn_unused_parameter;
2067 otherwise set maybe_warn_extra_parameter, which will be picked up
2069 maybe_warn_unused_parameter
= setting
;
2070 warn_unused_parameter
= (setting
&& extra_warnings
);
2071 warn_unused_variable
= setting
;
2072 warn_unused_value
= setting
;
2075 /* Used to set the level of strict aliasing warnings,
2076 when no level is specified (i.e., when -Wstrict-aliasing, and not
2077 -Wstrict-aliasing=level was given).
2078 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2079 and 0 otherwise. After calling this function, wstrict_aliasing will be
2080 set to the default value of -Wstrict_aliasing=level, currently 3. */
2082 set_Wstrict_aliasing (int onoff
)
2084 gcc_assert (onoff
== 0 || onoff
== 1);
2086 warn_strict_aliasing
= 3;
2088 warn_strict_aliasing
= 0;
2091 /* The following routines are useful in setting all the flags that
2092 -ffast-math and -fno-fast-math imply. */
2094 set_fast_math_flags (int set
)
2096 flag_unsafe_math_optimizations
= set
;
2097 set_unsafe_math_optimizations_flags (set
);
2098 flag_finite_math_only
= set
;
2099 flag_errno_math
= !set
;
2102 flag_signaling_nans
= 0;
2103 flag_rounding_math
= 0;
2104 flag_cx_limited_range
= 1;
2108 /* When -funsafe-math-optimizations is set the following
2109 flags are set as well. */
2111 set_unsafe_math_optimizations_flags (int set
)
2113 flag_trapping_math
= !set
;
2114 flag_signed_zeros
= !set
;
2115 flag_associative_math
= set
;
2116 flag_reciprocal_math
= set
;
2119 /* Return true iff flags are set as if -ffast-math. */
2121 fast_math_flags_set_p (void)
2123 return (!flag_trapping_math
2124 && flag_unsafe_math_optimizations
2125 && flag_finite_math_only
2126 && !flag_signed_zeros
2127 && !flag_errno_math
);
2130 /* Return true iff flags are set as if -ffast-math but using the flags stored
2131 in the struct cl_optimization structure. */
2133 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2135 return (!opt
->flag_trapping_math
2136 && opt
->flag_unsafe_math_optimizations
2137 && opt
->flag_finite_math_only
2138 && !opt
->flag_signed_zeros
2139 && !opt
->flag_errno_math
);
2142 /* Handle a debug output -g switch. EXTENDED is true or false to support
2143 extended output (2 is special and means "-ggdb" was given). */
2145 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2147 static bool type_explicit
;
2149 use_gnu_debug_info_extensions
= extended
;
2151 if (type
== NO_DEBUG
)
2153 if (write_symbols
== NO_DEBUG
)
2155 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2159 #ifdef DWARF2_DEBUGGING_INFO
2160 write_symbols
= DWARF2_DEBUG
;
2161 #elif defined DBX_DEBUGGING_INFO
2162 write_symbols
= DBX_DEBUG
;
2166 if (write_symbols
== NO_DEBUG
)
2167 warning (0, "target system does not support debug output");
2172 /* Does it conflict with an already selected type? */
2173 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2174 error ("debug format \"%s\" conflicts with prior selection",
2175 debug_type_names
[type
]);
2176 write_symbols
= type
;
2177 type_explicit
= true;
2180 /* A debug flag without a level defaults to level 2. */
2183 if (!debug_info_level
)
2184 debug_info_level
= 2;
2188 debug_info_level
= integral_argument (arg
);
2189 if (debug_info_level
== (unsigned int) -1)
2190 error ("unrecognised debug output level \"%s\"", arg
);
2191 else if (debug_info_level
> 3)
2192 error ("debug output level %s is too high", arg
);
2196 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2197 a simple on-off switch. */
2200 option_enabled (int opt_idx
)
2202 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2204 if (option
->flag_var
)
2205 switch (option
->var_type
)
2208 return *(int *) option
->flag_var
!= 0;
2211 return *(int *) option
->flag_var
== option
->var_value
;
2213 case CLVC_BIT_CLEAR
:
2214 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2217 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2225 /* Fill STATE with the current state of option OPTION. Return true if
2226 there is some state to store. */
2229 get_option_state (int option
, struct cl_option_state
*state
)
2231 if (cl_options
[option
].flag_var
== 0)
2234 switch (cl_options
[option
].var_type
)
2238 state
->data
= cl_options
[option
].flag_var
;
2239 state
->size
= sizeof (int);
2242 case CLVC_BIT_CLEAR
:
2244 state
->ch
= option_enabled (option
);
2245 state
->data
= &state
->ch
;
2250 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2251 if (state
->data
== 0)
2253 state
->size
= strlen ((const char *) state
->data
) + 1;
2259 /* Enable a warning option as an error. This is used by -Werror= and
2260 also by legacy Werror-implicit-function-declaration. */
2263 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2268 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2269 new_option
[0] = 'W';
2270 strcpy (new_option
+ 1, arg
);
2271 option_index
= find_opt (new_option
, lang_mask
);
2272 if (option_index
== N_OPTS
)
2274 error ("-Werror=%s: No option -%s", arg
, new_option
);
2278 int kind
= value
? DK_ERROR
: DK_WARNING
;
2279 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2281 /* -Werror=foo implies -Wfoo. */
2282 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2283 && cl_options
[option_index
].flag_var
2284 && kind
== DK_ERROR
)
2285 *(int *) cl_options
[option_index
].flag_var
= 1;