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"
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"
46 /* Value of the -G xx switch, and whether it was passed or not. */
47 unsigned HOST_WIDE_INT g_switch_value
;
50 /* Same for selective scheduling. */
51 bool sel_sched_switch_set
;
53 /* True if we should exit after parsing options. */
54 bool exit_after_options
;
56 /* Print various extra warnings. -W/-Wextra. */
59 /* True to warn about any objects definitions whose size is larger
60 than N bytes. Also want about function definitions whose returned
61 values are larger than N bytes, where N is `larger_than_size'. */
62 bool warn_larger_than
;
63 HOST_WIDE_INT larger_than_size
;
65 /* True to warn about any function whose frame size is larger
67 bool warn_frame_larger_than
;
68 HOST_WIDE_INT frame_larger_than_size
;
70 /* Type(s) of debugging information we are producing (if any). See
71 flags.h for the definitions of the different possible types of
72 debugging information. */
73 enum debug_info_type write_symbols
= NO_DEBUG
;
75 /* Level of debugging information we are producing. See flags.h for
76 the definitions of the different possible levels. */
77 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
79 /* A major contribution to object and executable size is debug
80 information size. A major contribution to debug information size
81 is struct descriptions replicated in several object files. The
82 following flags attempt to reduce this information. The basic
83 idea is to not emit struct debugging information in the current
84 compilation unit when that information will be generated by
85 another compilation unit.
87 Debug information for a struct defined in the current source
88 file should be generated in the object file. Likewise the
89 debug information for a struct defined in a header should be
90 generated in the object file of the corresponding source file.
91 Both of these case are handled when the base name of the file of
92 the struct definition matches the base name of the source file
93 of the current compilation unit. This matching emits minimal
94 struct debugging information.
96 The base file name matching rule above will fail to emit debug
97 information for structs defined in system headers. So a second
98 category of files includes system headers in addition to files
101 The remaining types of files are library headers and application
102 headers. We cannot currently distinguish these two types. */
104 enum debug_struct_file
106 DINFO_STRUCT_FILE_NONE
, /* Debug no structs. */
107 DINFO_STRUCT_FILE_BASE
, /* Debug structs defined in files with the
108 same base name as the compilation unit. */
109 DINFO_STRUCT_FILE_SYS
, /* Also debug structs defined in system
111 DINFO_STRUCT_FILE_ANY
/* Debug structs defined in all files. */
114 /* Generic structs (e.g. templates not explicitly specialized)
115 may not have a compilation unit associated with them, and so
116 may need to be treated differently from ordinary structs.
118 Structs only handled by reference (indirectly), will also usually
119 not need as much debugging information. */
121 static enum debug_struct_file debug_struct_ordinary
[DINFO_USAGE_NUM_ENUMS
]
122 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
123 static enum debug_struct_file debug_struct_generic
[DINFO_USAGE_NUM_ENUMS
]
124 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
126 /* Parse the -femit-struct-debug-detailed option value
127 and set the flag variables. */
129 #define MATCH( prefix, string ) \
130 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
131 ? ((string += sizeof prefix - 1), 1) : 0)
134 set_struct_debug_option (const char *spec
)
136 /* various labels for comparison */
137 static char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
138 static char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
139 static char none_lbl
[] = "none", any_lbl
[] = "any";
140 static char base_lbl
[] = "base", sys_lbl
[] = "sys";
142 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
143 /* Default is to apply to as much as possible. */
144 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
145 int ord
= 1, gen
= 1;
148 if (MATCH (dfn_lbl
, spec
))
149 usage
= DINFO_USAGE_DFN
;
150 else if (MATCH (dir_lbl
, spec
))
151 usage
= DINFO_USAGE_DIR_USE
;
152 else if (MATCH (ind_lbl
, spec
))
153 usage
= DINFO_USAGE_IND_USE
;
155 /* Generics or not? */
156 if (MATCH (ord_lbl
, spec
))
158 else if (MATCH (gen_lbl
, spec
))
161 /* What allowable environment? */
162 if (MATCH (none_lbl
, spec
))
163 files
= DINFO_STRUCT_FILE_NONE
;
164 else if (MATCH (any_lbl
, spec
))
165 files
= DINFO_STRUCT_FILE_ANY
;
166 else if (MATCH (sys_lbl
, spec
))
167 files
= DINFO_STRUCT_FILE_SYS
;
168 else if (MATCH (base_lbl
, spec
))
169 files
= DINFO_STRUCT_FILE_BASE
;
171 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
174 /* Effect the specification. */
175 if (usage
== DINFO_USAGE_NUM_ENUMS
)
179 debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
180 debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
181 debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
185 debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
186 debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
187 debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
193 debug_struct_ordinary
[usage
] = files
;
195 debug_struct_generic
[usage
] = files
;
199 set_struct_debug_option (spec
+1);
202 /* No more -femit-struct-debug-detailed specifications.
205 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
207 if (debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
208 < debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
209 || debug_struct_generic
[DINFO_USAGE_DIR_USE
]
210 < debug_struct_generic
[DINFO_USAGE_IND_USE
])
211 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
212 " as much as %<-femit-struct-debug-detailed=ind:...%>");
216 /* Find the base name of a path, stripping off both directories and
217 a single final extension. */
219 base_of_path (const char *path
, const char **base_out
)
221 const char *base
= path
;
223 const char *p
= path
;
227 if (IS_DIR_SEPARATOR(c
))
242 /* Match the base name of a file to the base name of a compilation unit. */
244 static const char *main_input_basename
;
245 static int main_input_baselength
;
248 matches_main_base (const char *path
)
250 /* Cache the last query. */
251 static const char *last_path
= NULL
;
252 static int last_match
= 0;
253 if (path
!= last_path
)
256 int length
= base_of_path (path
, &base
);
258 last_match
= (length
== main_input_baselength
259 && memcmp (base
, main_input_basename
, length
) == 0);
264 #ifdef DEBUG_DEBUG_STRUCT
267 dump_struct_debug (tree type
, enum debug_info_usage usage
,
268 enum debug_struct_file criterion
, int generic
,
269 int matches
, int result
)
271 /* Find the type name. */
272 tree type_decl
= TYPE_STUB_DECL (type
);
274 const char *name
= 0;
275 if (TREE_CODE (t
) == TYPE_DECL
)
278 name
= IDENTIFIER_POINTER (t
);
280 fprintf (stderr
, " struct %d %s %s %s %s %d %p %s\n",
282 DECL_IN_SYSTEM_HEADER (type_decl
) ? "sys" : "usr",
283 matches
? "bas" : "hdr",
284 generic
? "gen" : "ord",
285 usage
== DINFO_USAGE_DFN
? ";" :
286 usage
== DINFO_USAGE_DIR_USE
? "." : "*",
288 (void*) type_decl
, name
);
291 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
292 dump_struct_debug (type, usage, criterion, generic, matches, result)
296 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
303 should_emit_struct_debug (tree type
, enum debug_info_usage usage
)
305 enum debug_struct_file criterion
;
307 bool generic
= lang_hooks
.types
.generic_p (type
);
310 criterion
= debug_struct_generic
[usage
];
312 criterion
= debug_struct_ordinary
[usage
];
314 if (criterion
== DINFO_STRUCT_FILE_NONE
)
315 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
316 if (criterion
== DINFO_STRUCT_FILE_ANY
)
317 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
319 type_decl
= TYPE_STUB_DECL (type
);
321 if (criterion
== DINFO_STRUCT_FILE_SYS
&& DECL_IN_SYSTEM_HEADER (type_decl
))
322 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
324 if (matches_main_base (DECL_SOURCE_FILE (type_decl
)))
325 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, true, true);
326 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
329 /* Nonzero means use GNU-only extensions in the generated symbolic
330 debugging information. Currently, this only has an effect when
331 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
332 bool use_gnu_debug_info_extensions
;
334 /* The default visibility for all symbols (unless overridden) */
335 enum symbol_visibility default_visibility
= VISIBILITY_DEFAULT
;
337 /* Global visibility options. */
338 struct visibility_flags visibility_options
;
340 /* What to print when a switch has no documentation. */
341 #ifdef ENABLE_CHECKING
342 static const char undocumented_msg
[] = N_("This switch lacks documentation");
344 static const char undocumented_msg
[] = "";
347 /* Used for bookkeeping on whether user set these flags so
348 -fprofile-use/-fprofile-generate does not use them. */
349 static bool profile_arc_flag_set
, flag_profile_values_set
;
350 static bool flag_unroll_loops_set
, flag_tracer_set
;
351 static bool flag_value_profile_transformations_set
;
352 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
353 static bool flag_inline_functions_set
, flag_ipa_cp_set
, flag_ipa_cp_clone_set
;
354 static bool flag_predictive_commoning_set
, flag_unswitch_loops_set
, flag_gcse_after_reload_set
;
356 /* Functions excluded from profiling. */
358 typedef char *char_p
; /* For DEF_VEC_P. */
360 DEF_VEC_ALLOC_P(char_p
,heap
);
362 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
363 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
365 typedef const char *const_char_p
; /* For DEF_VEC_P. */
366 DEF_VEC_P(const_char_p
);
367 DEF_VEC_ALLOC_P(const_char_p
,heap
);
369 static VEC(const_char_p
,heap
) *ignored_options
;
371 /* Function calls disallowed under -Wdisallowed-function-list=... */
372 static VEC(char_p
,heap
) *warning_disallowed_functions
;
374 /* If -Wdisallowed-function-list=... */
375 bool warn_disallowed_functions
= false;
377 /* Input file names. */
378 const char **in_fnames
;
379 unsigned num_in_fnames
;
381 static int common_handle_option (size_t scode
, const char *arg
, int value
,
382 unsigned int lang_mask
);
383 static void handle_param (const char *);
384 static void set_Wextra (int);
385 static unsigned int handle_option (const char **argv
, unsigned int lang_mask
);
386 static char *write_langs (unsigned int lang_mask
);
387 static void complain_wrong_lang (const char *, const struct cl_option
*,
388 unsigned int lang_mask
);
389 static void handle_options (unsigned int, const char **, unsigned int);
390 static void set_debug_level (enum debug_info_type type
, int extended
,
393 /* If ARG is a non-negative integer made up solely of digits, return its
394 value, otherwise return -1. */
396 integral_argument (const char *arg
)
400 while (*p
&& ISDIGIT (*p
))
409 /* Return a malloced slash-separated list of languages in MASK. */
411 write_langs (unsigned int mask
)
413 unsigned int n
= 0, len
= 0;
414 const char *lang_name
;
417 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
418 if (mask
& (1U << n
))
419 len
+= strlen (lang_name
) + 1;
421 result
= XNEWVEC (char, len
);
423 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
424 if (mask
& (1U << n
))
428 strcpy (result
+ len
, lang_name
);
429 len
+= strlen (lang_name
);
437 /* Complain that switch OPT_INDEX does not apply to this front end. */
439 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
440 unsigned int lang_mask
)
442 char *ok_langs
, *bad_lang
;
444 ok_langs
= write_langs (option
->flags
);
445 bad_lang
= write_langs (lang_mask
);
447 /* Eventually this should become a hard error IMO. */
448 warning (0, "command line option \"%s\" is valid for %s but not for %s",
449 text
, ok_langs
, bad_lang
);
455 /* Buffer the unknown option described by the string OPT. Currently,
456 we only complain about unknown -Wno-* options if they may have
457 prevented a diagnostic. Otherwise, we just ignore them.
458 Note that if we do complain, it is only as a warning, not an error;
459 passing the compiler an unrecognised -Wno-* option should never
460 change whether the compilation succeeds or fails. */
462 static void postpone_unknown_option_warning(const char *opt
)
464 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
467 /* Produce a warning for each option previously buffered. */
469 void print_ignored_options (void)
471 location_t saved_loc
= input_location
;
475 while (!VEC_empty (const_char_p
, ignored_options
))
478 opt
= VEC_pop (const_char_p
, ignored_options
);
479 warning (0, "unrecognized command line option \"%s\"", opt
);
482 input_location
= saved_loc
;
485 /* Handle the switch beginning at ARGV for the language indicated by
486 LANG_MASK. Returns the number of switches consumed. */
488 handle_option (const char **argv
, unsigned int lang_mask
)
491 const char *opt
, *arg
= 0;
494 unsigned int result
= 0;
495 const struct cl_option
*option
;
499 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
500 if (opt_index
== cl_options_count
501 && (opt
[1] == 'W' || opt
[1] == 'f' || opt
[1] == 'm')
502 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
504 /* Drop the "no-" from negative switches. */
505 size_t len
= strlen (opt
) - 3;
507 dup
= XNEWVEC (char, len
+ 1);
510 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
513 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
514 if (opt_index
== cl_options_count
&& opt
[1] == 'W')
516 /* We don't generate warnings for unknown -Wno-* options
517 unless we issue diagnostics. */
518 postpone_unknown_option_warning (argv
[0]);
524 if (opt_index
== cl_options_count
)
527 option
= &cl_options
[opt_index
];
529 /* Reject negative form of switches that don't take negatives as
531 if (!value
&& (option
->flags
& CL_REJECT_NEGATIVE
))
534 /* We've recognized this switch. */
537 /* Check to see if the option is disabled for this configuration. */
538 if (option
->flags
& CL_DISABLED
)
540 error ("command line option %qs"
541 " is not supported by this configuration", opt
);
545 /* Sort out any argument the switch takes. */
546 if (option
->flags
& CL_JOINED
)
548 /* Have arg point to the original switch. This is because
549 some code, such as disable_builtin_function, expects its
550 argument to be persistent until the program exits. */
551 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
553 arg
+= strlen ("no-");
555 if (*arg
== '\0' && !(option
->flags
& CL_MISSING_OK
))
557 if (option
->flags
& CL_SEPARATE
)
563 /* Missing argument. */
567 else if (option
->flags
& CL_SEPARATE
)
573 /* Now we've swallowed any potential argument, complain if this
574 is a switch for a different front end. */
575 if (!(option
->flags
& (lang_mask
| CL_COMMON
| CL_TARGET
)))
577 complain_wrong_lang (argv
[0], option
, lang_mask
);
580 else if ((option
->flags
& CL_TARGET
)
581 && (option
->flags
& CL_LANG_ALL
)
582 && !(option
->flags
& lang_mask
))
584 /* Complain for target flag language mismatches if any languages
586 complain_wrong_lang (argv
[0], option
, lang_mask
);
590 if (arg
== NULL
&& (option
->flags
& (CL_JOINED
| CL_SEPARATE
)))
592 if (!lang_hooks
.missing_argument (opt
, opt_index
))
593 error ("missing argument to \"%s\"", opt
);
597 /* If the switch takes an integer, convert it. */
598 if (arg
&& (option
->flags
& CL_UINTEGER
))
600 value
= integral_argument (arg
);
603 error ("argument to \"%s\" should be a non-negative integer",
609 if (option
->flag_var
)
610 switch (option
->var_type
)
613 *(int *) option
->flag_var
= value
;
617 *(int *) option
->flag_var
= (value
619 : !option
->var_value
);
624 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
625 *(int *) option
->flag_var
|= option
->var_value
;
627 *(int *) option
->flag_var
&= ~option
->var_value
;
628 if (option
->flag_var
== &target_flags
)
629 target_flags_explicit
|= option
->var_value
;
633 *(const char **) option
->flag_var
= arg
;
637 if (option
->flags
& lang_mask
)
638 if (lang_hooks
.handle_option (opt_index
, arg
, value
) == 0)
641 if (result
&& (option
->flags
& CL_COMMON
))
642 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
645 if (result
&& (option
->flags
& CL_TARGET
))
646 if (!targetm
.handle_option (opt_index
, arg
, value
))
655 /* Handle FILENAME from the command line. */
657 add_input_filename (const char *filename
)
660 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
661 in_fnames
[num_in_fnames
- 1] = filename
;
664 /* Add comma-separated strings to a char_p vector. */
667 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
674 /* We never free this string. */
687 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
690 if (*r
== '\\' && r
[1] == ',')
698 if (*token_start
!= '\0')
699 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
702 /* Return whether we should exclude FNDECL from instrumentation. */
705 flag_instrument_functions_exclude_p (tree fndecl
)
707 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
713 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
715 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
719 if (strstr (name
, s
) != NULL
)
724 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
730 name
= DECL_SOURCE_FILE (fndecl
);
732 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
735 if (strstr (name
, s
) != NULL
)
744 /* Return whether this function call is disallowed. */
746 warn_if_disallowed_function_p (const_tree exp
)
748 if (TREE_CODE(exp
) == CALL_EXPR
749 && VEC_length (char_p
, warning_disallowed_functions
) > 0)
754 IDENTIFIER_POINTER (DECL_NAME (get_callee_fndecl (exp
)));
755 for (i
= 0; VEC_iterate (char_p
, warning_disallowed_functions
, i
, s
);
758 if (strcmp (fnname
, s
) == 0)
760 warning (OPT_Wdisallowed_function_list_
,
761 "disallowed call to %qs", fnname
);
768 /* Decode and handle the vector of command line options. LANG_MASK
769 contains has a single bit set representing the current
772 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
776 for (i
= 1; i
< argc
; i
+= n
)
778 const char *opt
= argv
[i
];
780 /* Interpret "-" or a non-switch as a file name. */
781 if (opt
[0] != '-' || opt
[1] == '\0')
783 if (main_input_filename
== NULL
)
785 main_input_filename
= opt
;
786 main_input_baselength
787 = base_of_path (main_input_filename
, &main_input_basename
);
789 add_input_filename (opt
);
794 n
= handle_option (argv
+ i
, lang_mask
);
799 error ("unrecognized command line option \"%s\"", opt
);
804 /* Parse command line options and set default flag values. Do minimal
805 options processing. */
807 decode_options (unsigned int argc
, const char **argv
)
809 static bool first_time_p
= true;
810 static int initial_max_aliased_vops
;
811 static int initial_avg_aliased_vops
;
812 static int initial_min_crossjump_insns
;
813 static int initial_max_fields_for_field_sensitive
;
814 static unsigned int initial_lang_mask
;
816 unsigned int i
, lang_mask
;
824 /* Perform language-specific options initialization. */
825 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
827 lang_hooks
.initialize_diagnostics (global_dc
);
829 /* Save initial values of parameters we reset. */
830 initial_max_aliased_vops
= MAX_ALIASED_VOPS
;
831 initial_avg_aliased_vops
= AVG_ALIASED_VOPS
;
832 initial_min_crossjump_insns
833 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
834 initial_max_fields_for_field_sensitive
835 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
838 lang_mask
= initial_lang_mask
;
840 /* Scan to see what optimization level has been specified. That will
841 determine the default value of many flags. */
842 for (i
= 1; i
< argc
; i
++)
844 if (!strcmp (argv
[i
], "-O"))
849 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
851 /* Handle -Os, -O2, -O3, -O69, ... */
852 const char *p
= &argv
[i
][2];
854 if ((p
[0] == 's') && (p
[1] == 0))
858 /* Optimizing for size forces optimize to be 2. */
863 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
864 if (optimize_val
!= -1)
866 optimize
= optimize_val
;
873 /* Use IRA if it is implemented for the target. */
874 if (targetm
.ira_cover_classes
)
877 /* -O1 optimizations. */
878 opt1
= (optimize
>= 1);
879 flag_defer_pop
= opt1
;
881 flag_delayed_branch
= opt1
;
883 #ifdef CAN_DEBUG_WITHOUT_FP
884 flag_omit_frame_pointer
= opt1
;
886 flag_guess_branch_prob
= opt1
;
887 flag_cprop_registers
= opt1
;
888 flag_if_conversion
= opt1
;
889 flag_if_conversion2
= opt1
;
890 flag_ipa_pure_const
= opt1
;
891 flag_ipa_reference
= opt1
;
892 flag_merge_constants
= opt1
;
893 flag_split_wide_types
= opt1
;
894 flag_tree_ccp
= opt1
;
895 flag_tree_dce
= opt1
;
896 flag_tree_dom
= opt1
;
897 flag_tree_dse
= opt1
;
898 flag_tree_ter
= opt1
;
899 flag_tree_sra
= opt1
;
900 flag_tree_copyrename
= opt1
;
901 flag_tree_fre
= opt1
;
902 flag_tree_copy_prop
= opt1
;
903 flag_tree_sink
= opt1
;
906 /* -O2 optimizations. */
907 opt2
= (optimize
>= 2);
908 flag_inline_small_functions
= opt2
;
909 flag_indirect_inlining
= opt2
;
910 flag_thread_jumps
= opt2
;
911 flag_crossjumping
= opt2
;
912 flag_optimize_sibling_calls
= opt2
;
913 flag_forward_propagate
= opt2
;
914 flag_cse_follow_jumps
= opt2
;
916 flag_expensive_optimizations
= opt2
;
917 flag_rerun_cse_after_loop
= opt2
;
918 flag_caller_saves
= opt2
;
919 flag_peephole2
= opt2
;
920 #ifdef INSN_SCHEDULING
921 flag_schedule_insns
= opt2
;
922 flag_schedule_insns_after_reload
= opt2
;
925 flag_strict_aliasing
= opt2
;
926 flag_strict_overflow
= opt2
;
927 flag_delete_null_pointer_checks
= opt2
;
928 flag_reorder_blocks
= opt2
;
929 flag_reorder_functions
= opt2
;
930 flag_tree_vrp
= opt2
;
931 flag_tree_builtin_call_dce
= opt2
;
932 flag_tree_pre
= opt2
;
933 flag_tree_switch_conversion
= 1;
936 /* Allow more virtual operators to increase alias precision. */
938 set_param_value ("max-aliased-vops",
939 (opt2
) ? 500 : initial_max_aliased_vops
);
941 /* Track fields in field-sensitive alias analysis. */
942 set_param_value ("max-fields-for-field-sensitive",
943 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
945 /* -O3 optimizations. */
946 opt3
= (optimize
>= 3);
947 flag_predictive_commoning
= opt3
;
948 flag_inline_functions
= opt3
;
949 flag_unswitch_loops
= opt3
;
950 flag_gcse_after_reload
= opt3
;
951 flag_tree_vectorize
= opt3
;
952 flag_ipa_cp_clone
= opt3
;
953 if (flag_ipa_cp_clone
)
956 /* Allow even more virtual operators. Max-aliased-vops was set above for
957 -O2, so don't reset it unless we are at -O3. */
959 set_param_value ("max-aliased-vops", 1000);
961 set_param_value ("avg-aliased-vops", (opt3
) ? 3 : initial_avg_aliased_vops
);
963 /* Just -O1/-O0 optimizations. */
964 opt1_max
= (optimize
<= 1);
965 align_loops
= opt1_max
;
966 align_jumps
= opt1_max
;
967 align_labels
= opt1_max
;
968 align_functions
= opt1_max
;
972 /* Inlining of functions reducing size is a good idea regardless of them
973 being declared inline. */
974 flag_inline_functions
= 1;
976 /* Basic optimization options. */
981 /* We want to crossjump as much as possible. */
982 set_param_value ("min-crossjump-insns", 1);
985 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
989 /* Initialize whether `char' is signed. */
990 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
991 /* Set this to a special "uninitialized" value. The actual default is
992 set after target options have been processed. */
993 flag_short_enums
= 2;
995 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
997 target_flags
= targetm
.default_target_flags
;
999 /* Some targets have ABI-specified unwind tables. */
1000 flag_unwind_tables
= targetm
.unwind_tables_default
;
1003 #ifdef OPTIMIZATION_OPTIONS
1004 /* Allow default optimizations to be specified on a per-machine basis. */
1005 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
1008 handle_options (argc
, argv
, lang_mask
);
1010 /* Handle related options for unit-at-a-time, toplevel-reorder, and
1012 if (!flag_unit_at_a_time
)
1014 if (flag_section_anchors
== 1)
1015 error ("Section anchors must be disabled when unit-at-a-time "
1017 flag_section_anchors
= 0;
1018 if (flag_toplevel_reorder
== 1)
1019 error ("Toplevel reorder must be disabled when unit-at-a-time "
1021 flag_toplevel_reorder
= 0;
1023 /* Unless the user has asked for section anchors, we disable toplevel
1024 reordering at -O0 to disable transformations that might be surprising
1025 to end users and to get -fno-toplevel-reorder tested. */
1026 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
1028 flag_toplevel_reorder
= 0;
1029 flag_section_anchors
= 0;
1031 if (!flag_toplevel_reorder
)
1033 if (flag_section_anchors
== 1)
1034 error ("section anchors must be disabled when toplevel reorder"
1036 flag_section_anchors
= 0;
1042 flag_pic
= flag_pie
;
1043 if (flag_pic
&& !flag_pie
)
1049 /* Inlining does not work if not optimizing,
1050 so force it not to be done. */
1055 /* The optimization to partition hot and cold basic blocks into separate
1056 sections of the .o and executable files does not work (currently)
1057 with exception handling. This is because there is no support for
1058 generating unwind info. If flag_exceptions is turned on we need to
1059 turn off the partitioning optimization. */
1061 if (flag_exceptions
&& flag_reorder_blocks_and_partition
)
1063 inform (input_location
,
1064 "-freorder-blocks-and-partition does not work with exceptions");
1065 flag_reorder_blocks_and_partition
= 0;
1066 flag_reorder_blocks
= 1;
1069 /* If user requested unwind info, then turn off the partitioning
1072 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1073 && flag_reorder_blocks_and_partition
)
1075 inform (input_location
, "-freorder-blocks-and-partition does not support unwind info");
1076 flag_reorder_blocks_and_partition
= 0;
1077 flag_reorder_blocks
= 1;
1080 /* If the target requested unwind info, then turn off the partitioning
1081 optimization with a different message. Likewise, if the target does not
1082 support named sections. */
1084 if (flag_reorder_blocks_and_partition
1085 && (!targetm
.have_named_sections
1086 || (flag_unwind_tables
&& targetm
.unwind_tables_default
)))
1088 inform (input_location
,
1089 "-freorder-blocks-and-partition does not work on this architecture");
1090 flag_reorder_blocks_and_partition
= 0;
1091 flag_reorder_blocks
= 1;
1094 /* Pipelining of outer loops is only possible when general pipelining
1095 capabilities are requested. */
1096 if (!flag_sel_sched_pipelining
)
1097 flag_sel_sched_pipelining_outer_loops
= 0;
1099 if (flag_ira
&& !targetm
.ira_cover_classes
)
1101 inform (input_location
, "-fira does not work on this architecture");
1105 /* Save the current optimization options if this is the first call. */
1108 optimization_default_node
= build_optimization_node ();
1109 optimization_current_node
= optimization_default_node
;
1110 first_time_p
= false;
1112 if (flag_conserve_stack
)
1114 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1115 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1116 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1117 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1122 #define LEFT_COLUMN 27
1124 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1125 followed by word-wrapped HELP in a second column. */
1127 wrap_help (const char *help
,
1129 unsigned int item_width
,
1130 unsigned int columns
)
1132 unsigned int col_width
= LEFT_COLUMN
;
1133 unsigned int remaining
, room
, len
;
1135 remaining
= strlen (help
);
1139 room
= columns
- 3 - MAX (col_width
, item_width
);
1148 for (i
= 0; help
[i
]; i
++)
1150 if (i
>= room
&& len
!= remaining
)
1154 else if ((help
[i
] == '-' || help
[i
] == '/')
1155 && help
[i
+ 1] != ' '
1156 && i
> 0 && ISALPHA (help
[i
- 1]))
1161 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1163 while (help
[len
] == ' ')
1171 /* Print help for a specific front-end, etc. */
1173 print_filtered_help (unsigned int include_flags
,
1174 unsigned int exclude_flags
,
1175 unsigned int any_flags
,
1176 unsigned int columns
)
1180 static char *printed
= NULL
;
1182 bool displayed
= false;
1184 if (include_flags
== CL_PARAMS
)
1186 for (i
= 0; i
< LAST_PARAM
; i
++)
1188 const char *param
= compiler_params
[i
].option
;
1190 help
= compiler_params
[i
].help
;
1191 if (help
== NULL
|| *help
== '\0')
1193 if (exclude_flags
& CL_UNDOCUMENTED
)
1195 help
= undocumented_msg
;
1198 /* Get the translation. */
1201 wrap_help (help
, param
, strlen (param
), columns
);
1208 printed
= XCNEWVAR (char, cl_options_count
);
1210 for (i
= 0; i
< cl_options_count
; i
++)
1212 static char new_help
[128];
1213 const struct cl_option
*option
= cl_options
+ i
;
1218 if (include_flags
== 0
1219 || ((option
->flags
& include_flags
) != include_flags
))
1221 if ((option
->flags
& any_flags
) == 0)
1225 /* Skip unwanted switches. */
1226 if ((option
->flags
& exclude_flags
) != 0)
1230 /* Skip switches that have already been printed. */
1236 help
= option
->help
;
1239 if (exclude_flags
& CL_UNDOCUMENTED
)
1241 help
= undocumented_msg
;
1244 /* Get the translation. */
1247 /* Find the gap between the name of the
1248 option and its descriptive text. */
1249 tab
= strchr (help
, '\t');
1258 opt
= option
->opt_text
;
1262 /* With the -Q option enabled we change the descriptive text associated
1263 with an option to be an indication of its current setting. */
1266 if (len
< (LEFT_COLUMN
+ 2))
1267 strcpy (new_help
, "\t\t");
1269 strcpy (new_help
, "\t");
1271 if (option
->flag_var
!= NULL
)
1273 if (option
->flags
& CL_JOINED
)
1275 if (option
->var_type
== CLVC_STRING
)
1277 if (* (const char **) option
->flag_var
!= NULL
)
1278 snprintf (new_help
+ strlen (new_help
),
1279 sizeof (new_help
) - strlen (new_help
),
1280 * (const char **) option
->flag_var
);
1283 sprintf (new_help
+ strlen (new_help
),
1284 "%#x", * (int *) option
->flag_var
);
1287 strcat (new_help
, option_enabled (i
)
1288 ? _("[enabled]") : _("[disabled]"));
1294 wrap_help (help
, opt
, len
, columns
);
1300 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1303 printf (_(" No options with the desired characteristics were found\n"));
1308 /* PR 31349: Tell the user how to see all of the
1309 options supported by a specific front end. */
1310 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1311 if ((1U << i
) & langs
)
1312 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1313 lang_names
[i
], lang_names
[i
]);
1317 else if (! displayed
)
1318 printf (_(" All options with the desired characteristics have already been displayed\n"));
1323 /* Display help for a specified type of option.
1324 The options must have ALL of the INCLUDE_FLAGS set
1325 ANY of the flags in the ANY_FLAGS set
1326 and NONE of the EXCLUDE_FLAGS set. */
1328 print_specific_help (unsigned int include_flags
,
1329 unsigned int exclude_flags
,
1330 unsigned int any_flags
)
1332 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1333 const char * description
= NULL
;
1334 const char * descrip_extra
= "";
1337 static unsigned int columns
= 0;
1339 /* Sanity check: Make sure that we do not have more
1340 languages than we have bits available to enumerate them. */
1341 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1343 /* If we have not done so already, obtain
1344 the desired maximum width of the output. */
1349 GET_ENVIRONMENT (p
, "COLUMNS");
1352 int value
= atoi (p
);
1359 /* Use a reasonable default. */
1363 /* Decide upon the title for the options that we are going to display. */
1364 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1366 switch (flag
& include_flags
)
1372 description
= _("The following options are target specific");
1375 description
= _("The following options control compiler warning messages");
1377 case CL_OPTIMIZATION
:
1378 description
= _("The following options control optimizations");
1381 description
= _("The following options are language-independent");
1384 description
= _("The --param option recognizes the following as parameters");
1387 if (i
>= cl_lang_count
)
1389 if ((exclude_flags
& ((1U << cl_lang_count
) - 1)) != 0)
1390 description
= _("The following options are specific to just the language ");
1392 description
= _("The following options are supported by the language ");
1393 descrip_extra
= lang_names
[i
];
1398 if (description
== NULL
)
1402 if (include_flags
== CL_UNDOCUMENTED
)
1403 description
= _("The following options are not documented");
1406 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1413 if (any_flags
& all_langs_mask
)
1414 description
= _("The following options are language-related");
1416 description
= _("The following options are language-independent");
1420 printf ("%s%s:\n", description
, descrip_extra
);
1421 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1424 /* Handle target- and language-independent options. Return zero to
1425 generate an "unknown option" message. Only options that need
1426 extra handling need to be listed here; if you simply want
1427 VALUE assigned to a variable, it happens automatically. */
1430 common_handle_option (size_t scode
, const char *arg
, int value
,
1431 unsigned int lang_mask
)
1433 static bool verbose
= false;
1434 enum opt_code code
= (enum opt_code
) scode
;
1449 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1450 unsigned int undoc_mask
;
1453 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1454 /* First display any single language specific options. */
1455 for (i
= 0; i
< cl_lang_count
; i
++)
1457 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1458 /* Next display any multi language specific options. */
1459 print_specific_help (0, undoc_mask
, all_langs_mask
);
1460 /* Then display any remaining, non-language options. */
1461 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1463 print_specific_help (i
, undoc_mask
, 0);
1464 exit_after_options
= true;
1468 case OPT_ftarget_help
:
1469 case OPT__target_help
:
1470 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1471 exit_after_options
= true;
1473 /* Allow the target a chance to give the user some additional information. */
1474 if (targetm
.target_help
)
1475 targetm
.target_help ();
1481 const char * a
= arg
;
1482 unsigned int include_flags
= 0;
1483 /* Note - by default we include undocumented options when listing
1484 specific classes. If you only want to see documented options
1485 then add ",^undocumented" to the --help= option. E.g.:
1487 --help=target,^undocumented */
1488 unsigned int exclude_flags
= 0;
1490 /* Walk along the argument string, parsing each word in turn.
1492 arg = [^]{word}[,{arg}]
1493 word = {optimizers|target|warnings|undocumented|
1494 params|common|<language>} */
1499 const char * string
;
1504 { "optimizers", CL_OPTIMIZATION
},
1505 { "target", CL_TARGET
},
1506 { "warnings", CL_WARNING
},
1507 { "undocumented", CL_UNDOCUMENTED
},
1508 { "params", CL_PARAMS
},
1509 { "joined", CL_JOINED
},
1510 { "separate", CL_SEPARATE
},
1511 { "common", CL_COMMON
},
1514 unsigned int * pflags
;
1516 unsigned int lang_flag
, specific_flag
;
1523 pflags
= & exclude_flags
;
1526 pflags
= & include_flags
;
1528 comma
= strchr (a
, ',');
1534 /* Check to see if the string matches an option class name. */
1535 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1536 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1538 specific_flag
= specifics
[i
].flag
;
1542 /* Check to see if the string matches a language name.
1543 Note - we rely upon the alpha-sorted nature of the entries in
1544 the lang_names array, specifically that shorter names appear
1545 before their longer variants. (i.e. C before C++). That way
1546 when we are attempting to match --help=c for example we will
1547 match with C first and not C++. */
1548 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1549 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1551 lang_flag
= 1U << i
;
1555 if (specific_flag
!= 0)
1558 * pflags
|= specific_flag
;
1561 /* The option's argument matches both the start of a
1562 language name and the start of an option class name.
1563 We have a special case for when the user has
1564 specified "--help=c", but otherwise we have to issue
1566 if (strncasecmp (a
, "c", len
) == 0)
1567 * pflags
|= lang_flag
;
1570 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1574 else if (lang_flag
!= 0)
1575 * pflags
|= lang_flag
;
1578 "warning: unrecognized argument to --help= option: %.*s\n",
1587 print_specific_help (include_flags
, exclude_flags
, 0);
1588 exit_after_options
= true;
1593 print_version (stderr
, "");
1594 exit_after_options
= true;
1598 g_switch_value
= value
;
1599 g_switch_set
= true;
1604 /* Currently handled in a prescan. */
1608 /* For backward compatibility, -W is the same as -Wextra. */
1612 case OPT_Wdisallowed_function_list_
:
1613 warn_disallowed_functions
= true;
1614 add_comma_separated_to_vector
1615 (&warning_disallowed_functions
, arg
);
1619 enable_warning_as_error (arg
, value
, lang_mask
);
1626 case OPT_Wlarger_than_
:
1627 /* This form corresponds to -Wlarger-than-.
1628 Kept for backward compatibility.
1629 Don't use it as the first argument of warning(). */
1631 case OPT_Wlarger_than_eq
:
1632 larger_than_size
= value
;
1633 warn_larger_than
= value
!= -1;
1636 case OPT_Wframe_larger_than_
:
1637 frame_larger_than_size
= value
;
1638 warn_frame_larger_than
= value
!= -1;
1641 case OPT_Wstrict_aliasing
:
1642 set_Wstrict_aliasing (value
);
1645 case OPT_Wstrict_aliasing_
:
1646 warn_strict_aliasing
= value
;
1649 case OPT_Wstrict_overflow
:
1650 warn_strict_overflow
= (value
1651 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1655 case OPT_Wstrict_overflow_
:
1656 warn_strict_overflow
= value
;
1660 warn_unused
= value
;
1665 aux_info_file_name
= arg
;
1666 flag_gen_aux_info
= 1;
1670 aux_base_name
= arg
;
1673 case OPT_auxbase_strip
:
1675 char *tmp
= xstrdup (arg
);
1676 strip_off_ending (tmp
, strlen (tmp
));
1678 aux_base_name
= tmp
;
1683 decode_d_option (arg
);
1687 dump_base_name
= arg
;
1690 case OPT_falign_functions_
:
1691 align_functions
= value
;
1694 case OPT_falign_jumps_
:
1695 align_jumps
= value
;
1698 case OPT_falign_labels_
:
1699 align_labels
= value
;
1702 case OPT_falign_loops_
:
1703 align_loops
= value
;
1706 case OPT_fbranch_probabilities
:
1707 flag_branch_probabilities_set
= true;
1710 case OPT_fcall_used_
:
1711 fix_register (arg
, 0, 1);
1714 case OPT_fcall_saved_
:
1715 fix_register (arg
, 0, 0);
1719 dbg_cnt_process_opt (arg
);
1722 case OPT_fdbg_cnt_list
:
1723 dbg_cnt_list_all_counters ();
1726 case OPT_fdebug_prefix_map_
:
1727 add_debug_prefix_map (arg
);
1730 case OPT_fdiagnostics_show_location_
:
1731 if (!strcmp (arg
, "once"))
1732 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1733 else if (!strcmp (arg
, "every-line"))
1734 diagnostic_prefixing_rule (global_dc
)
1735 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1740 case OPT_fdiagnostics_show_option
:
1741 global_dc
->show_option_requested
= true;
1745 if (!dump_switch_p (arg
))
1749 case OPT_ffast_math
:
1750 set_fast_math_flags (value
);
1753 case OPT_funsafe_math_optimizations
:
1754 set_unsafe_math_optimizations_flags (value
);
1758 fix_register (arg
, 1, 1);
1761 case OPT_finline_limit_
:
1762 case OPT_finline_limit_eq
:
1763 set_param_value ("max-inline-insns-single", value
/ 2);
1764 set_param_value ("max-inline-insns-auto", value
/ 2);
1767 case OPT_finstrument_functions_exclude_function_list_
:
1768 add_comma_separated_to_vector
1769 (&flag_instrument_functions_exclude_functions
, arg
);
1772 case OPT_finstrument_functions_exclude_file_list_
:
1773 add_comma_separated_to_vector
1774 (&flag_instrument_functions_exclude_files
, arg
);
1777 case OPT_fmessage_length_
:
1778 pp_set_line_maximum_length (global_dc
->printer
, value
);
1781 case OPT_fpack_struct_
:
1782 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1783 error ("structure alignment must be a small power of two, not %d", value
);
1786 initial_max_fld_align
= value
;
1787 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1791 case OPT_fpeel_loops
:
1792 flag_peel_loops_set
= true;
1795 case OPT_fprofile_arcs
:
1796 profile_arc_flag_set
= true;
1799 case OPT_finline_functions
:
1800 flag_inline_functions_set
= true;
1803 case OPT_fprofile_dir_
:
1804 profile_data_prefix
= xstrdup (arg
);
1807 case OPT_fprofile_use_
:
1808 profile_data_prefix
= xstrdup (arg
);
1809 flag_profile_use
= true;
1811 /* No break here - do -fprofile-use processing. */
1812 case OPT_fprofile_use
:
1813 if (!flag_branch_probabilities_set
)
1814 flag_branch_probabilities
= value
;
1815 if (!flag_profile_values_set
)
1816 flag_profile_values
= value
;
1817 if (!flag_unroll_loops_set
)
1818 flag_unroll_loops
= value
;
1819 if (!flag_peel_loops_set
)
1820 flag_peel_loops
= value
;
1821 if (!flag_tracer_set
)
1822 flag_tracer
= value
;
1823 if (!flag_value_profile_transformations_set
)
1824 flag_value_profile_transformations
= value
;
1825 if (!flag_inline_functions_set
)
1826 flag_inline_functions
= value
;
1827 if (!flag_ipa_cp_set
)
1828 flag_ipa_cp
= value
;
1829 if (!flag_ipa_cp_clone_set
1830 && value
&& flag_ipa_cp
)
1831 flag_ipa_cp_clone
= value
;
1832 if (!flag_predictive_commoning_set
)
1833 flag_predictive_commoning
= value
;
1834 if (!flag_unswitch_loops_set
)
1835 flag_unswitch_loops
= value
;
1836 if (!flag_gcse_after_reload_set
)
1837 flag_gcse_after_reload
= value
;
1840 case OPT_fprofile_generate_
:
1841 profile_data_prefix
= xstrdup (arg
);
1843 /* No break here - do -fprofile-generate processing. */
1844 case OPT_fprofile_generate
:
1845 if (!profile_arc_flag_set
)
1846 profile_arc_flag
= value
;
1847 if (!flag_profile_values_set
)
1848 flag_profile_values
= value
;
1849 if (!flag_value_profile_transformations_set
)
1850 flag_value_profile_transformations
= value
;
1851 if (!flag_inline_functions_set
)
1852 flag_inline_functions
= value
;
1855 case OPT_fprofile_values
:
1856 flag_profile_values_set
= true;
1859 case OPT_fvisibility_
:
1861 if (!strcmp(arg
, "default"))
1862 default_visibility
= VISIBILITY_DEFAULT
;
1863 else if (!strcmp(arg
, "internal"))
1864 default_visibility
= VISIBILITY_INTERNAL
;
1865 else if (!strcmp(arg
, "hidden"))
1866 default_visibility
= VISIBILITY_HIDDEN
;
1867 else if (!strcmp(arg
, "protected"))
1868 default_visibility
= VISIBILITY_PROTECTED
;
1870 error ("unrecognized visibility value \"%s\"", arg
);
1875 flag_value_profile_transformations_set
= true;
1878 case OPT_frandom_seed
:
1879 /* The real switch is -fno-random-seed. */
1882 set_random_seed (NULL
);
1885 case OPT_frandom_seed_
:
1886 set_random_seed (arg
);
1889 case OPT_fselective_scheduling
:
1890 case OPT_fselective_scheduling2
:
1891 sel_sched_switch_set
= true;
1894 case OPT_fsched_verbose_
:
1895 #ifdef INSN_SCHEDULING
1896 fix_sched_param ("verbose", arg
);
1902 case OPT_fsched_stalled_insns_
:
1903 flag_sched_stalled_insns
= value
;
1904 if (flag_sched_stalled_insns
== 0)
1905 flag_sched_stalled_insns
= -1;
1908 case OPT_fsched_stalled_insns_dep_
:
1909 flag_sched_stalled_insns_dep
= value
;
1912 case OPT_fstack_check_
:
1913 if (!strcmp (arg
, "no"))
1914 flag_stack_check
= NO_STACK_CHECK
;
1915 else if (!strcmp (arg
, "generic"))
1916 /* This is the old stack checking method. */
1917 flag_stack_check
= STACK_CHECK_BUILTIN
1918 ? FULL_BUILTIN_STACK_CHECK
1919 : GENERIC_STACK_CHECK
;
1920 else if (!strcmp (arg
, "specific"))
1921 /* This is the new stack checking method. */
1922 flag_stack_check
= STACK_CHECK_BUILTIN
1923 ? FULL_BUILTIN_STACK_CHECK
1924 : STACK_CHECK_STATIC_BUILTIN
1925 ? STATIC_BUILTIN_STACK_CHECK
1926 : GENERIC_STACK_CHECK
;
1928 warning (0, "unknown stack check parameter \"%s\"", arg
);
1931 case OPT_fstack_check
:
1932 /* This is the same as the "specific" mode above. */
1934 flag_stack_check
= STACK_CHECK_BUILTIN
1935 ? FULL_BUILTIN_STACK_CHECK
1936 : STACK_CHECK_STATIC_BUILTIN
1937 ? STATIC_BUILTIN_STACK_CHECK
1938 : GENERIC_STACK_CHECK
;
1940 flag_stack_check
= NO_STACK_CHECK
;
1943 case OPT_fstack_limit
:
1944 /* The real switch is -fno-stack-limit. */
1947 stack_limit_rtx
= NULL_RTX
;
1950 case OPT_fstack_limit_register_
:
1952 int reg
= decode_reg_name (arg
);
1954 error ("unrecognized register name \"%s\"", arg
);
1956 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1960 case OPT_fstack_limit_symbol_
:
1961 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1964 case OPT_ftree_vectorizer_verbose_
:
1965 vect_set_verbosity_level (arg
);
1968 case OPT_ftls_model_
:
1969 if (!strcmp (arg
, "global-dynamic"))
1970 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
1971 else if (!strcmp (arg
, "local-dynamic"))
1972 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
1973 else if (!strcmp (arg
, "initial-exec"))
1974 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
1975 else if (!strcmp (arg
, "local-exec"))
1976 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
1978 warning (0, "unknown tls-model \"%s\"", arg
);
1981 case OPT_fira_algorithm_
:
1982 if (!strcmp (arg
, "regional"))
1983 flag_ira_algorithm
= IRA_ALGORITHM_REGIONAL
;
1984 else if (!strcmp (arg
, "CB"))
1985 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
1986 else if (!strcmp (arg
, "mixed"))
1987 flag_ira_algorithm
= IRA_ALGORITHM_MIXED
;
1989 warning (0, "unknown ira algorithm \"%s\"", arg
);
1992 case OPT_fira_verbose_
:
1993 flag_ira_verbose
= value
;
1997 flag_tracer_set
= true;
2001 flag_ipa_cp_set
= true;
2004 case OPT_fipa_cp_clone
:
2005 flag_ipa_cp_clone_set
= true;
2008 case OPT_fpredictive_commoning
:
2009 flag_predictive_commoning_set
= true;
2012 case OPT_funswitch_loops
:
2013 flag_unswitch_loops_set
= true;
2016 case OPT_fgcse_after_reload
:
2017 flag_gcse_after_reload_set
= true;
2020 case OPT_funroll_loops
:
2021 flag_unroll_loops_set
= true;
2025 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2029 set_debug_level (SDB_DEBUG
, false, arg
);
2033 set_debug_level (DWARF2_DEBUG
, false, arg
);
2037 set_debug_level (NO_DEBUG
, 2, arg
);
2042 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2046 set_debug_level (VMS_DEBUG
, false, arg
);
2051 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2055 asm_file_name
= arg
;
2058 case OPT_pedantic_errors
:
2059 flag_pedantic_errors
= pedantic
= 1;
2062 case OPT_floop_optimize
:
2063 case OPT_frerun_loop_opt
:
2064 case OPT_fstrength_reduce
:
2065 case OPT_ftree_store_copy_prop
:
2066 case OPT_fforce_addr
:
2067 case OPT_ftree_salias
:
2068 case OPT_ftree_store_ccp
:
2069 /* These are no-ops, preserved for backward compatibility. */
2073 /* If the flag was handled in a standard way, assume the lack of
2074 processing here is intentional. */
2075 gcc_assert (cl_options
[scode
].flag_var
);
2082 /* Handle --param NAME=VALUE. */
2084 handle_param (const char *carg
)
2089 arg
= xstrdup (carg
);
2090 equal
= strchr (arg
, '=');
2092 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2095 value
= integral_argument (equal
+ 1);
2097 error ("invalid --param value %qs", equal
+ 1);
2101 set_param_value (arg
, value
);
2108 /* Handle -W and -Wextra. */
2110 set_Wextra (int setting
)
2112 extra_warnings
= setting
;
2114 /* We save the value of warn_uninitialized, since if they put
2115 -Wuninitialized on the command line, we need to generate a
2116 warning about not using it without also specifying -O. */
2118 warn_uninitialized
= 0;
2119 else if (warn_uninitialized
!= 1)
2120 warn_uninitialized
= 2;
2123 /* Used to set the level of strict aliasing warnings,
2124 when no level is specified (i.e., when -Wstrict-aliasing, and not
2125 -Wstrict-aliasing=level was given).
2126 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2127 and 0 otherwise. After calling this function, wstrict_aliasing will be
2128 set to the default value of -Wstrict_aliasing=level, currently 3. */
2130 set_Wstrict_aliasing (int onoff
)
2132 gcc_assert (onoff
== 0 || onoff
== 1);
2134 warn_strict_aliasing
= 3;
2136 warn_strict_aliasing
= 0;
2139 /* The following routines are useful in setting all the flags that
2140 -ffast-math and -fno-fast-math imply. */
2142 set_fast_math_flags (int set
)
2144 flag_unsafe_math_optimizations
= set
;
2145 set_unsafe_math_optimizations_flags (set
);
2146 flag_finite_math_only
= set
;
2147 flag_errno_math
= !set
;
2150 flag_signaling_nans
= 0;
2151 flag_rounding_math
= 0;
2152 flag_cx_limited_range
= 1;
2156 /* When -funsafe-math-optimizations is set the following
2157 flags are set as well. */
2159 set_unsafe_math_optimizations_flags (int set
)
2161 flag_trapping_math
= !set
;
2162 flag_signed_zeros
= !set
;
2163 flag_associative_math
= set
;
2164 flag_reciprocal_math
= set
;
2167 /* Return true iff flags are set as if -ffast-math. */
2169 fast_math_flags_set_p (void)
2171 return (!flag_trapping_math
2172 && flag_unsafe_math_optimizations
2173 && flag_finite_math_only
2174 && !flag_signed_zeros
2175 && !flag_errno_math
);
2178 /* Return true iff flags are set as if -ffast-math but using the flags stored
2179 in the struct cl_optimization structure. */
2181 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2183 return (!opt
->flag_trapping_math
2184 && opt
->flag_unsafe_math_optimizations
2185 && opt
->flag_finite_math_only
2186 && !opt
->flag_signed_zeros
2187 && !opt
->flag_errno_math
);
2190 /* Handle a debug output -g switch. EXTENDED is true or false to support
2191 extended output (2 is special and means "-ggdb" was given). */
2193 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2195 static bool type_explicit
;
2197 use_gnu_debug_info_extensions
= extended
;
2199 if (type
== NO_DEBUG
)
2201 if (write_symbols
== NO_DEBUG
)
2203 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2207 #ifdef DWARF2_DEBUGGING_INFO
2208 write_symbols
= DWARF2_DEBUG
;
2209 #elif defined DBX_DEBUGGING_INFO
2210 write_symbols
= DBX_DEBUG
;
2214 if (write_symbols
== NO_DEBUG
)
2215 warning (0, "target system does not support debug output");
2220 /* Does it conflict with an already selected type? */
2221 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2222 error ("debug format \"%s\" conflicts with prior selection",
2223 debug_type_names
[type
]);
2224 write_symbols
= type
;
2225 type_explicit
= true;
2228 /* A debug flag without a level defaults to level 2. */
2231 if (!debug_info_level
)
2232 debug_info_level
= 2;
2236 debug_info_level
= integral_argument (arg
);
2237 if (debug_info_level
== (unsigned int) -1)
2238 error ("unrecognised debug output level \"%s\"", arg
);
2239 else if (debug_info_level
> 3)
2240 error ("debug output level %s is too high", arg
);
2244 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2245 a simple on-off switch. */
2248 option_enabled (int opt_idx
)
2250 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2252 if (option
->flag_var
)
2253 switch (option
->var_type
)
2256 return *(int *) option
->flag_var
!= 0;
2259 return *(int *) option
->flag_var
== option
->var_value
;
2261 case CLVC_BIT_CLEAR
:
2262 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2265 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2273 /* Fill STATE with the current state of option OPTION. Return true if
2274 there is some state to store. */
2277 get_option_state (int option
, struct cl_option_state
*state
)
2279 if (cl_options
[option
].flag_var
== 0)
2282 switch (cl_options
[option
].var_type
)
2286 state
->data
= cl_options
[option
].flag_var
;
2287 state
->size
= sizeof (int);
2290 case CLVC_BIT_CLEAR
:
2292 state
->ch
= option_enabled (option
);
2293 state
->data
= &state
->ch
;
2298 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2299 if (state
->data
== 0)
2301 state
->size
= strlen ((const char *) state
->data
) + 1;
2307 /* Enable a warning option as an error. This is used by -Werror= and
2308 also by legacy Werror-implicit-function-declaration. */
2311 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2316 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2317 new_option
[0] = 'W';
2318 strcpy (new_option
+ 1, arg
);
2319 option_index
= find_opt (new_option
, lang_mask
);
2320 if (option_index
== N_OPTS
)
2322 error ("-Werror=%s: No option -%s", arg
, new_option
);
2326 int kind
= value
? DK_ERROR
: DK_WARNING
;
2327 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2329 /* -Werror=foo implies -Wfoo. */
2330 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2331 && cl_options
[option_index
].flag_var
2332 && kind
== DK_ERROR
)
2333 *(int *) cl_options
[option_index
].flag_var
= 1;