1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
32 #include "langhooks.h"
38 #include "diagnostic.h"
39 #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
40 #include "insn-attr.h" /* For INSN_SCHEDULING. */
42 #include "tree-pass.h"
47 #include "lto-streamer.h"
49 /* Value of the -G xx switch, and whether it was passed or not. */
50 unsigned HOST_WIDE_INT g_switch_value
;
53 /* Same for selective scheduling. */
54 bool sel_sched_switch_set
;
56 /* True if we should exit after parsing options. */
57 bool exit_after_options
;
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 static const char undocumented_msg
[] = N_("This switch lacks documentation");
343 /* Used for bookkeeping on whether user set these flags so
344 -fprofile-use/-fprofile-generate does not use them. */
345 static bool profile_arc_flag_set
, flag_profile_values_set
;
346 static bool flag_unroll_loops_set
, flag_tracer_set
;
347 static bool flag_value_profile_transformations_set
;
348 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
349 static bool flag_inline_functions_set
, flag_ipa_cp_set
, flag_ipa_cp_clone_set
;
350 static bool flag_predictive_commoning_set
, flag_unswitch_loops_set
, flag_gcse_after_reload_set
;
352 /* Functions excluded from profiling. */
354 typedef char *char_p
; /* For DEF_VEC_P. */
356 DEF_VEC_ALLOC_P(char_p
,heap
);
358 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
359 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
361 typedef const char *const_char_p
; /* For DEF_VEC_P. */
362 DEF_VEC_P(const_char_p
);
363 DEF_VEC_ALLOC_P(const_char_p
,heap
);
365 static VEC(const_char_p
,heap
) *ignored_options
;
367 /* Language specific warning pass for unused results. */
368 bool flag_warn_unused_result
= false;
370 /* Input file names. */
371 const char **in_fnames
;
372 unsigned num_in_fnames
;
374 static int common_handle_option (size_t scode
, const char *arg
, int value
,
375 unsigned int lang_mask
);
376 static void handle_param (const char *);
377 static unsigned int handle_option (const char **argv
, unsigned int lang_mask
);
378 static char *write_langs (unsigned int lang_mask
);
379 static void complain_wrong_lang (const char *, const struct cl_option
*,
380 unsigned int lang_mask
);
381 static void handle_options (unsigned int, const char **, unsigned int);
382 static void set_debug_level (enum debug_info_type type
, int extended
,
385 /* If ARG is a non-negative integer made up solely of digits, return its
386 value, otherwise return -1. */
388 integral_argument (const char *arg
)
392 while (*p
&& ISDIGIT (*p
))
401 /* Return a malloced slash-separated list of languages in MASK. */
403 write_langs (unsigned int mask
)
405 unsigned int n
= 0, len
= 0;
406 const char *lang_name
;
409 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
410 if (mask
& (1U << n
))
411 len
+= strlen (lang_name
) + 1;
413 result
= XNEWVEC (char, len
);
415 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
416 if (mask
& (1U << n
))
420 strcpy (result
+ len
, lang_name
);
421 len
+= strlen (lang_name
);
429 /* Complain that switch OPT_INDEX does not apply to this front end. */
431 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
432 unsigned int lang_mask
)
434 char *ok_langs
, *bad_lang
;
436 /* The LTO front end inherits all the options from the first front
437 end that was used. However, not all the original front end
438 options make sense in LTO.
440 A real solution would be to filter this in collect2, but collect2
441 does not have access to all the option attributes to know what to
442 filter. So, in lto1 we silently accept inherited flags and do
444 if (lang_mask
& CL_LTO
)
447 ok_langs
= write_langs (option
->flags
);
448 bad_lang
= write_langs (lang_mask
);
450 /* Eventually this should become a hard error IMO. */
451 warning (0, "command line option \"%s\" is valid for %s but not for %s",
452 text
, ok_langs
, bad_lang
);
458 /* Buffer the unknown option described by the string OPT. Currently,
459 we only complain about unknown -Wno-* options if they may have
460 prevented a diagnostic. Otherwise, we just ignore them.
461 Note that if we do complain, it is only as a warning, not an error;
462 passing the compiler an unrecognised -Wno-* option should never
463 change whether the compilation succeeds or fails. */
465 static void postpone_unknown_option_warning(const char *opt
)
467 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
470 /* Produce a warning for each option previously buffered. */
472 void print_ignored_options (void)
474 location_t saved_loc
= input_location
;
478 while (!VEC_empty (const_char_p
, ignored_options
))
481 opt
= VEC_pop (const_char_p
, ignored_options
);
482 warning (0, "unrecognized command line option \"%s\"", opt
);
485 input_location
= saved_loc
;
488 /* Handle the switch beginning at ARGV for the language indicated by
489 LANG_MASK. Returns the number of switches consumed. */
491 handle_option (const char **argv
, unsigned int lang_mask
)
494 const char *opt
, *arg
= 0;
497 unsigned int result
= 0;
498 const struct cl_option
*option
;
502 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
503 if (opt_index
== cl_options_count
504 && (opt
[1] == 'W' || opt
[1] == 'f' || opt
[1] == 'm')
505 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
507 /* Drop the "no-" from negative switches. */
508 size_t len
= strlen (opt
) - 3;
510 dup
= XNEWVEC (char, len
+ 1);
513 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
516 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
517 if (opt_index
== cl_options_count
&& opt
[1] == 'W')
519 /* We don't generate warnings for unknown -Wno-* options
520 unless we issue diagnostics. */
521 postpone_unknown_option_warning (argv
[0]);
527 if (opt_index
== cl_options_count
)
530 option
= &cl_options
[opt_index
];
532 /* Reject negative form of switches that don't take negatives as
534 if (!value
&& (option
->flags
& CL_REJECT_NEGATIVE
))
537 /* We've recognized this switch. */
540 /* Check to see if the option is disabled for this configuration. */
541 if (option
->flags
& CL_DISABLED
)
543 error ("command line option %qs"
544 " is not supported by this configuration", opt
);
548 /* Sort out any argument the switch takes. */
549 if (option
->flags
& CL_JOINED
)
551 /* Have arg point to the original switch. This is because
552 some code, such as disable_builtin_function, expects its
553 argument to be persistent until the program exits. */
554 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
556 arg
+= strlen ("no-");
558 if (*arg
== '\0' && !(option
->flags
& CL_MISSING_OK
))
560 if (option
->flags
& CL_SEPARATE
)
566 /* Missing argument. */
570 else if (option
->flags
& CL_SEPARATE
)
576 /* Now we've swallowed any potential argument, complain if this
577 is a switch for a different front end. */
578 if (!(option
->flags
& (lang_mask
| CL_COMMON
| CL_TARGET
)))
580 complain_wrong_lang (argv
[0], option
, lang_mask
);
583 else if ((option
->flags
& CL_TARGET
)
584 && (option
->flags
& CL_LANG_ALL
)
585 && !(option
->flags
& lang_mask
))
587 /* Complain for target flag language mismatches if any languages
589 complain_wrong_lang (argv
[0], option
, lang_mask
);
593 if (arg
== NULL
&& (option
->flags
& (CL_JOINED
| CL_SEPARATE
)))
595 if (!lang_hooks
.missing_argument (opt
, opt_index
))
596 error ("missing argument to \"%s\"", opt
);
600 /* If the switch takes an integer, convert it. */
601 if (arg
&& (option
->flags
& CL_UINTEGER
))
603 value
= integral_argument (arg
);
606 error ("argument to \"%s\" should be a non-negative integer",
612 if (option
->flag_var
)
613 set_option (option
, value
, arg
);
615 if (option
->flags
& lang_mask
)
617 if (lang_hooks
.handle_option (opt_index
, arg
, value
) == 0)
620 lto_register_user_option (opt_index
, arg
, value
, lang_mask
);
623 if (result
&& (option
->flags
& CL_COMMON
))
625 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
628 lto_register_user_option (opt_index
, arg
, value
, CL_COMMON
);
631 if (result
&& (option
->flags
& CL_TARGET
))
633 if (!targetm
.handle_option (opt_index
, arg
, value
))
636 lto_register_user_option (opt_index
, arg
, value
, CL_TARGET
);
645 /* Handle FILENAME from the command line. */
647 add_input_filename (const char *filename
)
650 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
651 in_fnames
[num_in_fnames
- 1] = filename
;
654 /* Add comma-separated strings to a char_p vector. */
657 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
664 /* We never free this string. */
677 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
680 if (*r
== '\\' && r
[1] == ',')
688 if (*token_start
!= '\0')
689 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
692 /* Return whether we should exclude FNDECL from instrumentation. */
695 flag_instrument_functions_exclude_p (tree fndecl
)
697 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
703 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
705 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
709 if (strstr (name
, s
) != NULL
)
714 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
720 name
= DECL_SOURCE_FILE (fndecl
);
722 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
725 if (strstr (name
, s
) != NULL
)
734 /* Decode and handle the vector of command line options. LANG_MASK
735 contains has a single bit set representing the current
738 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
742 for (i
= 1; i
< argc
; i
+= n
)
744 const char *opt
= argv
[i
];
746 /* Interpret "-" or a non-switch as a file name. */
747 if (opt
[0] != '-' || opt
[1] == '\0')
749 if (main_input_filename
== NULL
)
751 main_input_filename
= opt
;
752 main_input_baselength
753 = base_of_path (main_input_filename
, &main_input_basename
);
755 add_input_filename (opt
);
760 n
= handle_option (argv
+ i
, lang_mask
);
765 error ("unrecognized command line option \"%s\"", opt
);
770 /* Parse command line options and set default flag values. Do minimal
771 options processing. */
773 decode_options (unsigned int argc
, const char **argv
)
775 static bool first_time_p
= true;
776 static int initial_min_crossjump_insns
;
777 static int initial_max_fields_for_field_sensitive
;
778 static int initial_loop_invariant_max_bbs_in_loop
;
779 static unsigned int initial_lang_mask
;
781 unsigned int i
, lang_mask
;
789 /* Perform language-specific options initialization. */
790 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
792 lang_hooks
.initialize_diagnostics (global_dc
);
794 /* Save initial values of parameters we reset. */
795 initial_min_crossjump_insns
796 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
797 initial_max_fields_for_field_sensitive
798 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
799 initial_loop_invariant_max_bbs_in_loop
800 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
803 lang_mask
= initial_lang_mask
;
805 /* Scan to see what optimization level has been specified. That will
806 determine the default value of many flags. */
807 for (i
= 1; i
< argc
; i
++)
809 if (!strcmp (argv
[i
], "-O"))
814 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
816 /* Handle -Os, -O2, -O3, -O69, ... */
817 const char *p
= &argv
[i
][2];
819 if ((p
[0] == 's') && (p
[1] == 0))
823 /* Optimizing for size forces optimize to be 2. */
828 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
829 if (optimize_val
!= -1)
831 optimize
= optimize_val
;
838 /* Use priority coloring if cover classes is not defined for the
840 if (targetm
.ira_cover_classes
== NULL
)
841 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
843 /* -O1 optimizations. */
844 opt1
= (optimize
>= 1);
845 flag_defer_pop
= opt1
;
847 flag_delayed_branch
= opt1
;
849 #ifdef CAN_DEBUG_WITHOUT_FP
850 flag_omit_frame_pointer
= opt1
;
852 flag_guess_branch_prob
= opt1
;
853 flag_cprop_registers
= opt1
;
854 flag_forward_propagate
= opt1
;
855 flag_if_conversion
= opt1
;
856 flag_if_conversion2
= opt1
;
857 flag_ipa_pure_const
= opt1
;
858 flag_ipa_reference
= opt1
;
859 flag_merge_constants
= opt1
;
860 flag_split_wide_types
= opt1
;
861 flag_tree_ccp
= opt1
;
862 flag_tree_dce
= opt1
;
863 flag_tree_dom
= opt1
;
864 flag_tree_dse
= opt1
;
865 flag_tree_ter
= opt1
;
866 flag_tree_sra
= opt1
;
867 flag_tree_copyrename
= opt1
;
868 flag_tree_fre
= opt1
;
869 flag_tree_copy_prop
= opt1
;
870 flag_tree_sink
= opt1
;
873 /* -O2 optimizations. */
874 opt2
= (optimize
>= 2);
875 flag_inline_small_functions
= opt2
;
876 flag_indirect_inlining
= opt2
;
877 flag_thread_jumps
= opt2
;
878 flag_crossjumping
= opt2
;
879 flag_optimize_sibling_calls
= opt2
;
880 flag_cse_follow_jumps
= opt2
;
882 flag_expensive_optimizations
= opt2
;
883 flag_rerun_cse_after_loop
= opt2
;
884 flag_caller_saves
= opt2
;
885 flag_peephole2
= opt2
;
886 #ifdef INSN_SCHEDULING
887 flag_schedule_insns
= opt2
;
888 flag_schedule_insns_after_reload
= opt2
;
891 flag_strict_aliasing
= opt2
;
892 flag_strict_overflow
= opt2
;
893 flag_reorder_blocks
= opt2
;
894 flag_reorder_functions
= opt2
;
895 flag_tree_vrp
= opt2
;
896 flag_tree_builtin_call_dce
= opt2
;
897 flag_tree_pre
= opt2
;
898 flag_tree_switch_conversion
= 1;
902 /* Track fields in field-sensitive alias analysis. */
903 set_param_value ("max-fields-for-field-sensitive",
904 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
906 /* For -O1 only do loop invariant motion for very small loops. */
907 set_param_value ("loop-invariant-max-bbs-in-loop",
908 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
910 /* -O3 optimizations. */
911 opt3
= (optimize
>= 3);
912 flag_predictive_commoning
= opt3
;
913 flag_inline_functions
= opt3
;
914 flag_unswitch_loops
= opt3
;
915 flag_gcse_after_reload
= opt3
;
916 flag_tree_vectorize
= opt3
;
917 flag_ipa_cp_clone
= opt3
;
918 if (flag_ipa_cp_clone
)
921 /* Just -O1/-O0 optimizations. */
922 opt1_max
= (optimize
<= 1);
923 align_loops
= opt1_max
;
924 align_jumps
= opt1_max
;
925 align_labels
= opt1_max
;
926 align_functions
= opt1_max
;
930 /* Inlining of functions reducing size is a good idea regardless of them
931 being declared inline. */
932 flag_inline_functions
= 1;
934 /* Basic optimization options. */
939 /* We want to crossjump as much as possible. */
940 set_param_value ("min-crossjump-insns", 1);
943 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
947 /* Initialize whether `char' is signed. */
948 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
949 /* Set this to a special "uninitialized" value. The actual default is
950 set after target options have been processed. */
951 flag_short_enums
= 2;
953 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
955 target_flags
= targetm
.default_target_flags
;
957 /* Some targets have ABI-specified unwind tables. */
958 flag_unwind_tables
= targetm
.unwind_tables_default
;
961 /* Clear any options currently held for LTO. */
962 lto_clear_user_options ();
964 #ifdef OPTIMIZATION_OPTIONS
965 /* Allow default optimizations to be specified on a per-machine basis. */
966 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
969 handle_options (argc
, argv
, lang_mask
);
971 /* Make DUMP_BASE_NAME relative to the AUX_BASE_NAME directory,
972 typically the directory to contain the object file. */
973 if (aux_base_name
&& ! IS_ABSOLUTE_PATH (dump_base_name
))
975 const char *aux_base
;
977 base_of_path (aux_base_name
, &aux_base
);
978 if (aux_base_name
!= aux_base
)
980 int dir_len
= aux_base
- aux_base_name
;
981 char *new_dump_base_name
=
982 XNEWVEC (char, strlen(dump_base_name
) + dir_len
+ 1);
984 /* Copy directory component from AUX_BASE_NAME. */
985 memcpy (new_dump_base_name
, aux_base_name
, dir_len
);
986 /* Append existing DUMP_BASE_NAME. */
987 strcpy (new_dump_base_name
+ dir_len
, dump_base_name
);
988 dump_base_name
= new_dump_base_name
;
992 /* Handle related options for unit-at-a-time, toplevel-reorder, and
994 if (!flag_unit_at_a_time
)
996 if (flag_section_anchors
== 1)
997 error ("Section anchors must be disabled when unit-at-a-time "
999 flag_section_anchors
= 0;
1000 if (flag_toplevel_reorder
== 1)
1001 error ("Toplevel reorder must be disabled when unit-at-a-time "
1003 flag_toplevel_reorder
= 0;
1005 /* Unless the user has asked for section anchors, we disable toplevel
1006 reordering at -O0 to disable transformations that might be surprising
1007 to end users and to get -fno-toplevel-reorder tested. */
1008 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
1010 flag_toplevel_reorder
= 0;
1011 flag_section_anchors
= 0;
1013 if (!flag_toplevel_reorder
)
1015 if (flag_section_anchors
== 1)
1016 error ("section anchors must be disabled when toplevel reorder"
1018 flag_section_anchors
= 0;
1024 flag_pic
= flag_pie
;
1025 if (flag_pic
&& !flag_pie
)
1031 /* Inlining does not work if not optimizing,
1032 so force it not to be done. */
1037 /* The optimization to partition hot and cold basic blocks into separate
1038 sections of the .o and executable files does not work (currently)
1039 with exception handling. This is because there is no support for
1040 generating unwind info. If flag_exceptions is turned on we need to
1041 turn off the partitioning optimization. */
1043 if (flag_exceptions
&& flag_reorder_blocks_and_partition
1044 && (USING_SJLJ_EXCEPTIONS
1045 #ifdef TARGET_UNWIND_INFO
1050 inform (input_location
,
1051 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1052 flag_reorder_blocks_and_partition
= 0;
1053 flag_reorder_blocks
= 1;
1056 /* If user requested unwind info, then turn off the partitioning
1059 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1060 && flag_reorder_blocks_and_partition
1061 && (USING_SJLJ_EXCEPTIONS
1062 #ifdef TARGET_UNWIND_INFO
1067 inform (input_location
,
1068 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1069 flag_reorder_blocks_and_partition
= 0;
1070 flag_reorder_blocks
= 1;
1073 /* If the target requested unwind info, then turn off the partitioning
1074 optimization with a different message. Likewise, if the target does not
1075 support named sections. */
1077 if (flag_reorder_blocks_and_partition
1078 && (!targetm
.have_named_sections
1079 || (flag_unwind_tables
&& targetm
.unwind_tables_default
1080 && (USING_SJLJ_EXCEPTIONS
1081 #ifdef TARGET_UNWIND_INFO
1086 inform (input_location
,
1087 "-freorder-blocks-and-partition does not work on this architecture");
1088 flag_reorder_blocks_and_partition
= 0;
1089 flag_reorder_blocks
= 1;
1092 /* Pipelining of outer loops is only possible when general pipelining
1093 capabilities are requested. */
1094 if (!flag_sel_sched_pipelining
)
1095 flag_sel_sched_pipelining_outer_loops
= 0;
1097 if (!targetm
.ira_cover_classes
1098 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1100 inform (input_location
,
1101 "-fira-algorithm=CB does not work on this architecture");
1102 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
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;
1120 if (flag_lto
|| flag_whopr
)
1123 flag_generate_lto
= 1;
1125 /* When generating IL, do not operate in whole-program mode.
1126 Otherwise, symbols will be privatized too early, causing link
1128 flag_whole_program
= 0;
1130 /* FIXME lto. Disable var-tracking until debug information
1131 is properly handled in free_lang_data. */
1132 flag_var_tracking
= 0;
1134 error ("LTO support has not been enabled in this configuration");
1138 /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
1139 check option consistency. */
1140 if (flag_lto
&& flag_whopr
)
1141 error ("-flto and -fwhopr are mutually exclusive");
1144 #define LEFT_COLUMN 27
1146 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1147 followed by word-wrapped HELP in a second column. */
1149 wrap_help (const char *help
,
1151 unsigned int item_width
,
1152 unsigned int columns
)
1154 unsigned int col_width
= LEFT_COLUMN
;
1155 unsigned int remaining
, room
, len
;
1157 remaining
= strlen (help
);
1161 room
= columns
- 3 - MAX (col_width
, item_width
);
1170 for (i
= 0; help
[i
]; i
++)
1172 if (i
>= room
&& len
!= remaining
)
1176 else if ((help
[i
] == '-' || help
[i
] == '/')
1177 && help
[i
+ 1] != ' '
1178 && i
> 0 && ISALPHA (help
[i
- 1]))
1183 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1185 while (help
[len
] == ' ')
1193 /* Print help for a specific front-end, etc. */
1195 print_filtered_help (unsigned int include_flags
,
1196 unsigned int exclude_flags
,
1197 unsigned int any_flags
,
1198 unsigned int columns
)
1202 static char *printed
= NULL
;
1204 bool displayed
= false;
1206 if (include_flags
== CL_PARAMS
)
1208 for (i
= 0; i
< LAST_PARAM
; i
++)
1210 const char *param
= compiler_params
[i
].option
;
1212 help
= compiler_params
[i
].help
;
1213 if (help
== NULL
|| *help
== '\0')
1215 if (exclude_flags
& CL_UNDOCUMENTED
)
1217 help
= undocumented_msg
;
1220 /* Get the translation. */
1223 wrap_help (help
, param
, strlen (param
), columns
);
1230 printed
= XCNEWVAR (char, cl_options_count
);
1232 for (i
= 0; i
< cl_options_count
; i
++)
1234 static char new_help
[128];
1235 const struct cl_option
*option
= cl_options
+ i
;
1240 if (include_flags
== 0
1241 || ((option
->flags
& include_flags
) != include_flags
))
1243 if ((option
->flags
& any_flags
) == 0)
1247 /* Skip unwanted switches. */
1248 if ((option
->flags
& exclude_flags
) != 0)
1252 /* Skip switches that have already been printed. */
1258 help
= option
->help
;
1261 if (exclude_flags
& CL_UNDOCUMENTED
)
1263 help
= undocumented_msg
;
1266 /* Get the translation. */
1269 /* Find the gap between the name of the
1270 option and its descriptive text. */
1271 tab
= strchr (help
, '\t');
1280 opt
= option
->opt_text
;
1284 /* With the -Q option enabled we change the descriptive text associated
1285 with an option to be an indication of its current setting. */
1288 if (len
< (LEFT_COLUMN
+ 2))
1289 strcpy (new_help
, "\t\t");
1291 strcpy (new_help
, "\t");
1293 if (option
->flag_var
!= NULL
)
1295 if (option
->flags
& CL_JOINED
)
1297 if (option
->var_type
== CLVC_STRING
)
1299 if (* (const char **) option
->flag_var
!= NULL
)
1300 snprintf (new_help
+ strlen (new_help
),
1301 sizeof (new_help
) - strlen (new_help
),
1302 * (const char **) option
->flag_var
);
1305 sprintf (new_help
+ strlen (new_help
),
1306 "%#x", * (int *) option
->flag_var
);
1309 strcat (new_help
, option_enabled (i
)
1310 ? _("[enabled]") : _("[disabled]"));
1316 wrap_help (help
, opt
, len
, columns
);
1322 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1325 printf (_(" No options with the desired characteristics were found\n"));
1330 /* PR 31349: Tell the user how to see all of the
1331 options supported by a specific front end. */
1332 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1333 if ((1U << i
) & langs
)
1334 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1335 lang_names
[i
], lang_names
[i
]);
1339 else if (! displayed
)
1340 printf (_(" All options with the desired characteristics have already been displayed\n"));
1345 /* Display help for a specified type of option.
1346 The options must have ALL of the INCLUDE_FLAGS set
1347 ANY of the flags in the ANY_FLAGS set
1348 and NONE of the EXCLUDE_FLAGS set. */
1350 print_specific_help (unsigned int include_flags
,
1351 unsigned int exclude_flags
,
1352 unsigned int any_flags
)
1354 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1355 const char * description
= NULL
;
1356 const char * descrip_extra
= "";
1359 static unsigned int columns
= 0;
1361 /* Sanity check: Make sure that we do not have more
1362 languages than we have bits available to enumerate them. */
1363 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1365 /* If we have not done so already, obtain
1366 the desired maximum width of the output. */
1371 GET_ENVIRONMENT (p
, "COLUMNS");
1374 int value
= atoi (p
);
1381 /* Use a reasonable default. */
1385 /* Decide upon the title for the options that we are going to display. */
1386 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1388 switch (flag
& include_flags
)
1394 description
= _("The following options are target specific");
1397 description
= _("The following options control compiler warning messages");
1399 case CL_OPTIMIZATION
:
1400 description
= _("The following options control optimizations");
1403 description
= _("The following options are language-independent");
1406 description
= _("The --param option recognizes the following as parameters");
1409 if (i
>= cl_lang_count
)
1411 if (exclude_flags
& all_langs_mask
)
1412 description
= _("The following options are specific to just the language ");
1414 description
= _("The following options are supported by the language ");
1415 descrip_extra
= lang_names
[i
];
1420 if (description
== NULL
)
1424 if (include_flags
& CL_UNDOCUMENTED
)
1425 description
= _("The following options are not documented");
1426 else if (include_flags
& CL_SEPARATE
)
1427 description
= _("The following options take separate arguments");
1428 else if (include_flags
& CL_JOINED
)
1429 description
= _("The following options take joined arguments");
1432 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1439 if (any_flags
& all_langs_mask
)
1440 description
= _("The following options are language-related");
1442 description
= _("The following options are language-independent");
1446 printf ("%s%s:\n", description
, descrip_extra
);
1447 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1450 /* Handle target- and language-independent options. Return zero to
1451 generate an "unknown option" message. Only options that need
1452 extra handling need to be listed here; if you simply want
1453 VALUE assigned to a variable, it happens automatically. */
1456 common_handle_option (size_t scode
, const char *arg
, int value
,
1457 unsigned int lang_mask
)
1459 static bool verbose
= false;
1460 enum opt_code code
= (enum opt_code
) scode
;
1475 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1476 unsigned int undoc_mask
;
1479 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1480 /* First display any single language specific options. */
1481 for (i
= 0; i
< cl_lang_count
; i
++)
1483 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1484 /* Next display any multi language specific options. */
1485 print_specific_help (0, undoc_mask
, all_langs_mask
);
1486 /* Then display any remaining, non-language options. */
1487 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1488 print_specific_help (i
, undoc_mask
, 0);
1489 exit_after_options
= true;
1493 case OPT_ftarget_help
:
1494 case OPT__target_help
:
1495 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1496 exit_after_options
= true;
1498 /* Allow the target a chance to give the user some additional information. */
1499 if (targetm
.target_help
)
1500 targetm
.target_help ();
1506 const char * a
= arg
;
1507 unsigned int include_flags
= 0;
1508 /* Note - by default we include undocumented options when listing
1509 specific classes. If you only want to see documented options
1510 then add ",^undocumented" to the --help= option. E.g.:
1512 --help=target,^undocumented */
1513 unsigned int exclude_flags
= 0;
1515 /* Walk along the argument string, parsing each word in turn.
1517 arg = [^]{word}[,{arg}]
1518 word = {optimizers|target|warnings|undocumented|
1519 params|common|<language>} */
1524 const char * string
;
1529 { "optimizers", CL_OPTIMIZATION
},
1530 { "target", CL_TARGET
},
1531 { "warnings", CL_WARNING
},
1532 { "undocumented", CL_UNDOCUMENTED
},
1533 { "params", CL_PARAMS
},
1534 { "joined", CL_JOINED
},
1535 { "separate", CL_SEPARATE
},
1536 { "common", CL_COMMON
},
1539 unsigned int * pflags
;
1541 unsigned int lang_flag
, specific_flag
;
1548 pflags
= & exclude_flags
;
1551 pflags
= & include_flags
;
1553 comma
= strchr (a
, ',');
1564 /* Check to see if the string matches an option class name. */
1565 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1566 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1568 specific_flag
= specifics
[i
].flag
;
1572 /* Check to see if the string matches a language name.
1573 Note - we rely upon the alpha-sorted nature of the entries in
1574 the lang_names array, specifically that shorter names appear
1575 before their longer variants. (i.e. C before C++). That way
1576 when we are attempting to match --help=c for example we will
1577 match with C first and not C++. */
1578 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1579 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1581 lang_flag
= 1U << i
;
1585 if (specific_flag
!= 0)
1588 * pflags
|= specific_flag
;
1591 /* The option's argument matches both the start of a
1592 language name and the start of an option class name.
1593 We have a special case for when the user has
1594 specified "--help=c", but otherwise we have to issue
1596 if (strncasecmp (a
, "c", len
) == 0)
1597 * pflags
|= lang_flag
;
1600 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1604 else if (lang_flag
!= 0)
1605 * pflags
|= lang_flag
;
1608 "warning: unrecognized argument to --help= option: %.*s\n",
1617 print_specific_help (include_flags
, exclude_flags
, 0);
1618 exit_after_options
= true;
1624 exit_after_options
= true;
1628 g_switch_value
= value
;
1629 g_switch_set
= true;
1634 /* Currently handled in a prescan. */
1638 enable_warning_as_error (arg
, value
, lang_mask
);
1641 case OPT_Wlarger_than_
:
1642 /* This form corresponds to -Wlarger-than-.
1643 Kept for backward compatibility.
1644 Don't use it as the first argument of warning(). */
1646 case OPT_Wlarger_than_eq
:
1647 larger_than_size
= value
;
1648 warn_larger_than
= value
!= -1;
1651 case OPT_Wframe_larger_than_
:
1652 frame_larger_than_size
= value
;
1653 warn_frame_larger_than
= value
!= -1;
1656 case OPT_Wstrict_aliasing
:
1657 set_Wstrict_aliasing (value
);
1660 case OPT_Wstrict_aliasing_
:
1661 warn_strict_aliasing
= value
;
1664 case OPT_Wstrict_overflow
:
1665 warn_strict_overflow
= (value
1666 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1670 case OPT_Wstrict_overflow_
:
1671 warn_strict_overflow
= value
;
1675 warn_unused
= value
;
1680 aux_info_file_name
= arg
;
1681 flag_gen_aux_info
= 1;
1685 aux_base_name
= arg
;
1688 case OPT_auxbase_strip
:
1690 char *tmp
= xstrdup (arg
);
1691 strip_off_ending (tmp
, strlen (tmp
));
1693 aux_base_name
= tmp
;
1698 decode_d_option (arg
);
1702 dump_base_name
= arg
;
1705 case OPT_falign_functions_
:
1706 align_functions
= value
;
1709 case OPT_falign_jumps_
:
1710 align_jumps
= value
;
1713 case OPT_falign_labels_
:
1714 align_labels
= value
;
1717 case OPT_falign_loops_
:
1718 align_loops
= value
;
1721 case OPT_fbranch_probabilities
:
1722 flag_branch_probabilities_set
= true;
1725 case OPT_fcall_used_
:
1726 fix_register (arg
, 0, 1);
1729 case OPT_fcall_saved_
:
1730 fix_register (arg
, 0, 0);
1734 dbg_cnt_process_opt (arg
);
1737 case OPT_fdbg_cnt_list
:
1738 dbg_cnt_list_all_counters ();
1741 case OPT_fdebug_prefix_map_
:
1742 add_debug_prefix_map (arg
);
1745 case OPT_fdiagnostics_show_location_
:
1746 if (!strcmp (arg
, "once"))
1747 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1748 else if (!strcmp (arg
, "every-line"))
1749 diagnostic_prefixing_rule (global_dc
)
1750 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1755 case OPT_fdiagnostics_show_option
:
1756 global_dc
->show_option_requested
= true;
1760 if (!dump_switch_p (arg
))
1764 case OPT_fexcess_precision_
:
1765 if (!strcmp (arg
, "fast"))
1766 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1767 else if (!strcmp (arg
, "standard"))
1768 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1770 error ("unknown excess precision style \"%s\"", arg
);
1773 case OPT_ffast_math
:
1774 set_fast_math_flags (value
);
1777 case OPT_funsafe_math_optimizations
:
1778 set_unsafe_math_optimizations_flags (value
);
1782 fix_register (arg
, 1, 1);
1785 case OPT_finline_limit_
:
1786 case OPT_finline_limit_eq
:
1787 set_param_value ("max-inline-insns-single", value
/ 2);
1788 set_param_value ("max-inline-insns-auto", value
/ 2);
1791 case OPT_finstrument_functions_exclude_function_list_
:
1792 add_comma_separated_to_vector
1793 (&flag_instrument_functions_exclude_functions
, arg
);
1796 case OPT_finstrument_functions_exclude_file_list_
:
1797 add_comma_separated_to_vector
1798 (&flag_instrument_functions_exclude_files
, arg
);
1801 case OPT_fmessage_length_
:
1802 pp_set_line_maximum_length (global_dc
->printer
, value
);
1805 case OPT_fpack_struct_
:
1806 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1807 error ("structure alignment must be a small power of two, not %d", value
);
1810 initial_max_fld_align
= value
;
1811 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1815 case OPT_fpeel_loops
:
1816 flag_peel_loops_set
= true;
1820 #ifdef ENABLE_PLUGIN
1821 add_new_plugin (arg
);
1823 error ("Plugin support is disabled. Configure with --enable-plugin.");
1827 case OPT_fplugin_arg_
:
1828 #ifdef ENABLE_PLUGIN
1829 parse_plugin_arg_opt (arg
);
1831 error ("Plugin support is disabled. Configure with --enable-plugin.");
1835 case OPT_fprofile_arcs
:
1836 profile_arc_flag_set
= true;
1839 case OPT_finline_functions
:
1840 flag_inline_functions_set
= true;
1843 case OPT_fprofile_dir_
:
1844 profile_data_prefix
= xstrdup (arg
);
1847 case OPT_fprofile_use_
:
1848 profile_data_prefix
= xstrdup (arg
);
1849 flag_profile_use
= true;
1851 /* No break here - do -fprofile-use processing. */
1852 case OPT_fprofile_use
:
1853 if (!flag_branch_probabilities_set
)
1854 flag_branch_probabilities
= value
;
1855 if (!flag_profile_values_set
)
1856 flag_profile_values
= value
;
1857 if (!flag_unroll_loops_set
)
1858 flag_unroll_loops
= value
;
1859 if (!flag_peel_loops_set
)
1860 flag_peel_loops
= value
;
1861 if (!flag_tracer_set
)
1862 flag_tracer
= value
;
1863 if (!flag_value_profile_transformations_set
)
1864 flag_value_profile_transformations
= value
;
1865 if (!flag_inline_functions_set
)
1866 flag_inline_functions
= value
;
1867 if (!flag_ipa_cp_set
)
1868 flag_ipa_cp
= value
;
1869 if (!flag_ipa_cp_clone_set
1870 && value
&& flag_ipa_cp
)
1871 flag_ipa_cp_clone
= value
;
1872 if (!flag_predictive_commoning_set
)
1873 flag_predictive_commoning
= value
;
1874 if (!flag_unswitch_loops_set
)
1875 flag_unswitch_loops
= value
;
1876 if (!flag_gcse_after_reload_set
)
1877 flag_gcse_after_reload
= value
;
1880 case OPT_fprofile_generate_
:
1881 profile_data_prefix
= xstrdup (arg
);
1883 /* No break here - do -fprofile-generate processing. */
1884 case OPT_fprofile_generate
:
1885 if (!profile_arc_flag_set
)
1886 profile_arc_flag
= value
;
1887 if (!flag_profile_values_set
)
1888 flag_profile_values
= value
;
1889 if (!flag_value_profile_transformations_set
)
1890 flag_value_profile_transformations
= value
;
1891 if (!flag_inline_functions_set
)
1892 flag_inline_functions
= value
;
1895 case OPT_fprofile_values
:
1896 flag_profile_values_set
= true;
1899 case OPT_fvisibility_
:
1901 if (!strcmp(arg
, "default"))
1902 default_visibility
= VISIBILITY_DEFAULT
;
1903 else if (!strcmp(arg
, "internal"))
1904 default_visibility
= VISIBILITY_INTERNAL
;
1905 else if (!strcmp(arg
, "hidden"))
1906 default_visibility
= VISIBILITY_HIDDEN
;
1907 else if (!strcmp(arg
, "protected"))
1908 default_visibility
= VISIBILITY_PROTECTED
;
1910 error ("unrecognized visibility value \"%s\"", arg
);
1915 flag_value_profile_transformations_set
= true;
1918 case OPT_frandom_seed
:
1919 /* The real switch is -fno-random-seed. */
1922 set_random_seed (NULL
);
1925 case OPT_frandom_seed_
:
1926 set_random_seed (arg
);
1929 case OPT_fselective_scheduling
:
1930 case OPT_fselective_scheduling2
:
1931 sel_sched_switch_set
= true;
1934 case OPT_fsched_verbose_
:
1935 #ifdef INSN_SCHEDULING
1936 fix_sched_param ("verbose", arg
);
1942 case OPT_fsched_stalled_insns_
:
1943 flag_sched_stalled_insns
= value
;
1944 if (flag_sched_stalled_insns
== 0)
1945 flag_sched_stalled_insns
= -1;
1948 case OPT_fsched_stalled_insns_dep_
:
1949 flag_sched_stalled_insns_dep
= value
;
1952 case OPT_fstack_check_
:
1953 if (!strcmp (arg
, "no"))
1954 flag_stack_check
= NO_STACK_CHECK
;
1955 else if (!strcmp (arg
, "generic"))
1956 /* This is the old stack checking method. */
1957 flag_stack_check
= STACK_CHECK_BUILTIN
1958 ? FULL_BUILTIN_STACK_CHECK
1959 : GENERIC_STACK_CHECK
;
1960 else if (!strcmp (arg
, "specific"))
1961 /* This is the new stack checking method. */
1962 flag_stack_check
= STACK_CHECK_BUILTIN
1963 ? FULL_BUILTIN_STACK_CHECK
1964 : STACK_CHECK_STATIC_BUILTIN
1965 ? STATIC_BUILTIN_STACK_CHECK
1966 : GENERIC_STACK_CHECK
;
1968 warning (0, "unknown stack check parameter \"%s\"", arg
);
1971 case OPT_fstack_check
:
1972 /* This is the same as the "specific" mode above. */
1974 flag_stack_check
= STACK_CHECK_BUILTIN
1975 ? FULL_BUILTIN_STACK_CHECK
1976 : STACK_CHECK_STATIC_BUILTIN
1977 ? STATIC_BUILTIN_STACK_CHECK
1978 : GENERIC_STACK_CHECK
;
1980 flag_stack_check
= NO_STACK_CHECK
;
1983 case OPT_fstack_limit
:
1984 /* The real switch is -fno-stack-limit. */
1987 stack_limit_rtx
= NULL_RTX
;
1990 case OPT_fstack_limit_register_
:
1992 int reg
= decode_reg_name (arg
);
1994 error ("unrecognized register name \"%s\"", arg
);
1996 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
2000 case OPT_fstack_limit_symbol_
:
2001 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
2004 case OPT_ftree_vectorizer_verbose_
:
2005 vect_set_verbosity_level (arg
);
2008 case OPT_ftls_model_
:
2009 if (!strcmp (arg
, "global-dynamic"))
2010 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
2011 else if (!strcmp (arg
, "local-dynamic"))
2012 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
2013 else if (!strcmp (arg
, "initial-exec"))
2014 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
2015 else if (!strcmp (arg
, "local-exec"))
2016 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
2018 warning (0, "unknown tls-model \"%s\"", arg
);
2021 case OPT_fira_algorithm_
:
2022 if (!strcmp (arg
, "CB"))
2023 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
2024 else if (!strcmp (arg
, "priority"))
2025 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
2027 warning (0, "unknown ira algorithm \"%s\"", arg
);
2030 case OPT_fira_region_
:
2031 if (!strcmp (arg
, "one"))
2032 flag_ira_region
= IRA_REGION_ONE
;
2033 else if (!strcmp (arg
, "all"))
2034 flag_ira_region
= IRA_REGION_ALL
;
2035 else if (!strcmp (arg
, "mixed"))
2036 flag_ira_region
= IRA_REGION_MIXED
;
2038 warning (0, "unknown ira region \"%s\"", arg
);
2041 case OPT_fira_verbose_
:
2042 flag_ira_verbose
= value
;
2046 flag_tracer_set
= true;
2050 flag_ipa_cp_set
= true;
2053 case OPT_fipa_cp_clone
:
2054 flag_ipa_cp_clone_set
= true;
2057 case OPT_fpredictive_commoning
:
2058 flag_predictive_commoning_set
= true;
2061 case OPT_funswitch_loops
:
2062 flag_unswitch_loops_set
= true;
2065 case OPT_fgcse_after_reload
:
2066 flag_gcse_after_reload_set
= true;
2069 case OPT_funroll_loops
:
2070 flag_unroll_loops_set
= true;
2074 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2078 set_debug_level (SDB_DEBUG
, false, arg
);
2082 if (value
< 2 || value
> 4)
2083 error ("dwarf version %d is not supported", value
);
2085 dwarf_version
= value
;
2086 set_debug_level (DWARF2_DEBUG
, false, "");
2090 set_debug_level (NO_DEBUG
, 2, arg
);
2095 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2099 set_debug_level (VMS_DEBUG
, false, arg
);
2104 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2108 asm_file_name
= arg
;
2111 case OPT_pedantic_errors
:
2112 flag_pedantic_errors
= pedantic
= 1;
2116 case OPT_fcse_skip_blocks
:
2117 case OPT_floop_optimize
:
2118 case OPT_frerun_loop_opt
:
2119 case OPT_fstrength_reduce
:
2120 case OPT_ftree_store_copy_prop
:
2121 case OPT_fforce_addr
:
2122 case OPT_ftree_salias
:
2123 case OPT_ftree_store_ccp
:
2124 /* These are no-ops, preserved for backward compatibility. */
2127 case OPT_fuse_linker_plugin
:
2128 /* No-op. Used by the driver and passed to us because it starts with f.*/
2132 /* If the flag was handled in a standard way, assume the lack of
2133 processing here is intentional. */
2134 gcc_assert (cl_options
[scode
].flag_var
);
2141 /* Handle --param NAME=VALUE. */
2143 handle_param (const char *carg
)
2148 arg
= xstrdup (carg
);
2149 equal
= strchr (arg
, '=');
2151 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2154 value
= integral_argument (equal
+ 1);
2156 error ("invalid --param value %qs", equal
+ 1);
2160 set_param_value (arg
, value
);
2167 /* Used to set the level of strict aliasing warnings,
2168 when no level is specified (i.e., when -Wstrict-aliasing, and not
2169 -Wstrict-aliasing=level was given).
2170 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2171 and 0 otherwise. After calling this function, wstrict_aliasing will be
2172 set to the default value of -Wstrict_aliasing=level, currently 3. */
2174 set_Wstrict_aliasing (int onoff
)
2176 gcc_assert (onoff
== 0 || onoff
== 1);
2178 warn_strict_aliasing
= 3;
2180 warn_strict_aliasing
= 0;
2183 /* The following routines are useful in setting all the flags that
2184 -ffast-math and -fno-fast-math imply. */
2186 set_fast_math_flags (int set
)
2188 flag_unsafe_math_optimizations
= set
;
2189 set_unsafe_math_optimizations_flags (set
);
2190 flag_finite_math_only
= set
;
2191 flag_errno_math
= !set
;
2194 flag_signaling_nans
= 0;
2195 flag_rounding_math
= 0;
2196 flag_cx_limited_range
= 1;
2200 /* When -funsafe-math-optimizations is set the following
2201 flags are set as well. */
2203 set_unsafe_math_optimizations_flags (int set
)
2205 flag_trapping_math
= !set
;
2206 flag_signed_zeros
= !set
;
2207 flag_associative_math
= set
;
2208 flag_reciprocal_math
= set
;
2211 /* Return true iff flags are set as if -ffast-math. */
2213 fast_math_flags_set_p (void)
2215 return (!flag_trapping_math
2216 && flag_unsafe_math_optimizations
2217 && flag_finite_math_only
2218 && !flag_signed_zeros
2219 && !flag_errno_math
);
2222 /* Return true iff flags are set as if -ffast-math but using the flags stored
2223 in the struct cl_optimization structure. */
2225 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2227 return (!opt
->flag_trapping_math
2228 && opt
->flag_unsafe_math_optimizations
2229 && opt
->flag_finite_math_only
2230 && !opt
->flag_signed_zeros
2231 && !opt
->flag_errno_math
);
2234 /* Handle a debug output -g switch. EXTENDED is true or false to support
2235 extended output (2 is special and means "-ggdb" was given). */
2237 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2239 static bool type_explicit
;
2241 use_gnu_debug_info_extensions
= extended
;
2243 if (type
== NO_DEBUG
)
2245 if (write_symbols
== NO_DEBUG
)
2247 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2251 #ifdef DWARF2_DEBUGGING_INFO
2252 write_symbols
= DWARF2_DEBUG
;
2253 #elif defined DBX_DEBUGGING_INFO
2254 write_symbols
= DBX_DEBUG
;
2258 if (write_symbols
== NO_DEBUG
)
2259 warning (0, "target system does not support debug output");
2264 /* Does it conflict with an already selected type? */
2265 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2266 error ("debug format \"%s\" conflicts with prior selection",
2267 debug_type_names
[type
]);
2268 write_symbols
= type
;
2269 type_explicit
= true;
2272 /* A debug flag without a level defaults to level 2. */
2275 if (!debug_info_level
)
2276 debug_info_level
= DINFO_LEVEL_NORMAL
;
2280 int argval
= integral_argument (arg
);
2282 error ("unrecognised debug output level \"%s\"", arg
);
2283 else if (argval
> 3)
2284 error ("debug output level %s is too high", arg
);
2286 debug_info_level
= (enum debug_info_level
) argval
;
2290 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2291 a simple on-off switch. */
2294 option_enabled (int opt_idx
)
2296 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2298 if (option
->flag_var
)
2299 switch (option
->var_type
)
2302 return *(int *) option
->flag_var
!= 0;
2305 return *(int *) option
->flag_var
== option
->var_value
;
2307 case CLVC_BIT_CLEAR
:
2308 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2311 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2319 /* Fill STATE with the current state of option OPTION. Return true if
2320 there is some state to store. */
2323 get_option_state (int option
, struct cl_option_state
*state
)
2325 if (cl_options
[option
].flag_var
== 0)
2328 switch (cl_options
[option
].var_type
)
2332 state
->data
= cl_options
[option
].flag_var
;
2333 state
->size
= sizeof (int);
2336 case CLVC_BIT_CLEAR
:
2338 state
->ch
= option_enabled (option
);
2339 state
->data
= &state
->ch
;
2344 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2345 if (state
->data
== 0)
2347 state
->size
= strlen ((const char *) state
->data
) + 1;
2353 /* Set *OPTION according to VALUE and ARG. */
2356 set_option (const struct cl_option
*option
, int value
, const char *arg
)
2358 if (!option
->flag_var
)
2361 switch (option
->var_type
)
2364 *(int *) option
->flag_var
= value
;
2368 *(int *) option
->flag_var
= (value
2370 : !option
->var_value
);
2373 case CLVC_BIT_CLEAR
:
2375 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
2376 *(int *) option
->flag_var
|= option
->var_value
;
2378 *(int *) option
->flag_var
&= ~option
->var_value
;
2379 if (option
->flag_var
== &target_flags
)
2380 target_flags_explicit
|= option
->var_value
;
2384 *(const char **) option
->flag_var
= arg
;
2389 /* Enable a warning option as an error. This is used by -Werror= and
2390 also by legacy Werror-implicit-function-declaration. */
2393 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2398 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2399 new_option
[0] = 'W';
2400 strcpy (new_option
+ 1, arg
);
2401 option_index
= find_opt (new_option
, lang_mask
);
2402 if (option_index
== N_OPTS
)
2404 error ("-Werror=%s: No option -%s", arg
, new_option
);
2408 diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2409 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2411 /* -Werror=foo implies -Wfoo. */
2412 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2413 && cl_options
[option_index
].flag_var
2414 && kind
== DK_ERROR
)
2415 *(int *) cl_options
[option_index
].flag_var
= 1;