1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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)
621 lto_register_user_option (opt_index
, arg
, value
, lang_mask
);
625 if (result
&& (option
->flags
& CL_COMMON
))
627 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
631 lto_register_user_option (opt_index
, arg
, value
, CL_COMMON
);
635 if (result
&& (option
->flags
& CL_TARGET
))
637 if (!targetm
.handle_option (opt_index
, arg
, value
))
641 lto_register_user_option (opt_index
, arg
, value
, CL_TARGET
);
651 /* Handle FILENAME from the command line. */
653 add_input_filename (const char *filename
)
656 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
657 in_fnames
[num_in_fnames
- 1] = filename
;
660 /* Add comma-separated strings to a char_p vector. */
663 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
670 /* We never free this string. */
683 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
686 if (*r
== '\\' && r
[1] == ',')
694 if (*token_start
!= '\0')
695 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
698 /* Return whether we should exclude FNDECL from instrumentation. */
701 flag_instrument_functions_exclude_p (tree fndecl
)
703 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
709 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
711 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
715 if (strstr (name
, s
) != NULL
)
720 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
726 name
= DECL_SOURCE_FILE (fndecl
);
728 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
731 if (strstr (name
, s
) != NULL
)
740 /* Decode and handle the vector of command line options. LANG_MASK
741 contains has a single bit set representing the current
744 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
748 for (i
= 1; i
< argc
; i
+= n
)
750 const char *opt
= argv
[i
];
752 /* Interpret "-" or a non-switch as a file name. */
753 if (opt
[0] != '-' || opt
[1] == '\0')
755 if (main_input_filename
== NULL
)
757 main_input_filename
= opt
;
758 main_input_baselength
759 = base_of_path (main_input_filename
, &main_input_basename
);
761 add_input_filename (opt
);
766 n
= handle_option (argv
+ i
, lang_mask
);
771 error ("unrecognized command line option \"%s\"", opt
);
776 /* Parse command line options and set default flag values. Do minimal
777 options processing. */
779 decode_options (unsigned int argc
, const char **argv
)
781 static bool first_time_p
= true;
782 static int initial_min_crossjump_insns
;
783 static int initial_max_fields_for_field_sensitive
;
784 static int initial_loop_invariant_max_bbs_in_loop
;
785 static unsigned int initial_lang_mask
;
787 unsigned int i
, lang_mask
;
795 /* Perform language-specific options initialization. */
796 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
798 lang_hooks
.initialize_diagnostics (global_dc
);
800 /* Save initial values of parameters we reset. */
801 initial_min_crossjump_insns
802 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
803 initial_max_fields_for_field_sensitive
804 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
805 initial_loop_invariant_max_bbs_in_loop
806 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
809 lang_mask
= initial_lang_mask
;
811 /* Scan to see what optimization level has been specified. That will
812 determine the default value of many flags. */
813 for (i
= 1; i
< argc
; i
++)
815 if (!strcmp (argv
[i
], "-O"))
820 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
822 /* Handle -Os, -O2, -O3, -O69, ... */
823 const char *p
= &argv
[i
][2];
825 if ((p
[0] == 's') && (p
[1] == 0))
829 /* Optimizing for size forces optimize to be 2. */
834 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
835 if (optimize_val
!= -1)
837 optimize
= optimize_val
;
838 if ((unsigned int) optimize
> 255)
846 /* Use priority coloring if cover classes is not defined for the
848 if (targetm
.ira_cover_classes
== NULL
)
849 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
851 /* -O1 optimizations. */
852 opt1
= (optimize
>= 1);
853 flag_defer_pop
= opt1
;
855 flag_delayed_branch
= opt1
;
857 #ifdef CAN_DEBUG_WITHOUT_FP
858 flag_omit_frame_pointer
= opt1
;
860 flag_guess_branch_prob
= opt1
;
861 flag_cprop_registers
= opt1
;
862 flag_forward_propagate
= opt1
;
863 flag_if_conversion
= opt1
;
864 flag_if_conversion2
= opt1
;
865 flag_ipa_pure_const
= opt1
;
866 flag_ipa_reference
= opt1
;
867 flag_merge_constants
= opt1
;
868 flag_split_wide_types
= opt1
;
869 flag_tree_ccp
= opt1
;
870 flag_tree_dce
= opt1
;
871 flag_tree_dom
= opt1
;
872 flag_tree_dse
= opt1
;
873 flag_tree_ter
= opt1
;
874 flag_tree_sra
= opt1
;
875 flag_tree_copyrename
= opt1
;
876 flag_tree_fre
= opt1
;
877 flag_tree_copy_prop
= opt1
;
878 flag_tree_sink
= opt1
;
881 /* -O2 optimizations. */
882 opt2
= (optimize
>= 2);
883 flag_inline_small_functions
= opt2
;
884 flag_indirect_inlining
= opt2
;
885 flag_thread_jumps
= opt2
;
886 flag_crossjumping
= opt2
;
887 flag_optimize_sibling_calls
= opt2
;
888 flag_cse_follow_jumps
= opt2
;
890 flag_expensive_optimizations
= opt2
;
891 flag_rerun_cse_after_loop
= opt2
;
892 flag_caller_saves
= opt2
;
893 flag_peephole2
= opt2
;
894 #ifdef INSN_SCHEDULING
895 /* Only run the pre-regalloc scheduling pass if optimizing for speed. */
896 flag_schedule_insns
= opt2
&& ! optimize_size
;
897 flag_schedule_insns_after_reload
= opt2
;
900 flag_strict_aliasing
= opt2
;
901 flag_strict_overflow
= opt2
;
902 flag_reorder_blocks
= opt2
;
903 flag_reorder_functions
= opt2
;
904 flag_tree_vrp
= opt2
;
905 flag_tree_builtin_call_dce
= opt2
;
906 flag_tree_pre
= opt2
;
907 flag_tree_switch_conversion
= opt2
;
911 /* Track fields in field-sensitive alias analysis. */
912 set_param_value ("max-fields-for-field-sensitive",
913 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
915 /* For -O1 only do loop invariant motion for very small loops. */
916 set_param_value ("loop-invariant-max-bbs-in-loop",
917 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
919 /* -O3 optimizations. */
920 opt3
= (optimize
>= 3);
921 flag_predictive_commoning
= opt3
;
922 flag_inline_functions
= opt3
;
923 flag_unswitch_loops
= opt3
;
924 flag_gcse_after_reload
= opt3
;
925 flag_tree_vectorize
= opt3
;
926 flag_ipa_cp_clone
= opt3
;
927 if (flag_ipa_cp_clone
)
930 /* Just -O1/-O0 optimizations. */
931 opt1_max
= (optimize
<= 1);
932 align_loops
= opt1_max
;
933 align_jumps
= opt1_max
;
934 align_labels
= opt1_max
;
935 align_functions
= opt1_max
;
939 /* Inlining of functions reducing size is a good idea regardless of them
940 being declared inline. */
941 flag_inline_functions
= 1;
943 /* Basic optimization options. */
948 /* We want to crossjump as much as possible. */
949 set_param_value ("min-crossjump-insns", 1);
952 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
956 /* Initialize whether `char' is signed. */
957 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
958 /* Set this to a special "uninitialized" value. The actual default is
959 set after target options have been processed. */
960 flag_short_enums
= 2;
962 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
964 target_flags
= targetm
.default_target_flags
;
966 /* Some targets have ABI-specified unwind tables. */
967 flag_unwind_tables
= targetm
.unwind_tables_default
;
971 /* Clear any options currently held for LTO. */
972 lto_clear_user_options ();
975 #ifdef OPTIMIZATION_OPTIONS
976 /* Allow default optimizations to be specified on a per-machine basis. */
977 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
980 handle_options (argc
, argv
, lang_mask
);
982 if (dump_base_name
&& ! IS_ABSOLUTE_PATH (dump_base_name
))
984 /* First try to make DUMP_BASE_NAME relative to the DUMP_DIR_NAME
985 directory. Then try to make DUMP_BASE_NAME relative to the
986 AUX_BASE_NAME directory, typically the directory to contain
989 dump_base_name
= concat (dump_dir_name
, dump_base_name
, NULL
);
990 else if (aux_base_name
)
992 const char *aux_base
;
994 base_of_path (aux_base_name
, &aux_base
);
995 if (aux_base_name
!= aux_base
)
997 int dir_len
= aux_base
- aux_base_name
;
998 char *new_dump_base_name
=
999 XNEWVEC (char, strlen(dump_base_name
) + dir_len
+ 1);
1001 /* Copy directory component from AUX_BASE_NAME. */
1002 memcpy (new_dump_base_name
, aux_base_name
, dir_len
);
1003 /* Append existing DUMP_BASE_NAME. */
1004 strcpy (new_dump_base_name
+ dir_len
, dump_base_name
);
1005 dump_base_name
= new_dump_base_name
;
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
)
1045 first_time_p
= false;
1050 /* Inlining does not work if not optimizing,
1051 so force it not to be done. */
1056 /* The optimization to partition hot and cold basic blocks into separate
1057 sections of the .o and executable files does not work (currently)
1058 with exception handling. This is because there is no support for
1059 generating unwind info. If flag_exceptions is turned on we need to
1060 turn off the partitioning optimization. */
1062 if (flag_exceptions
&& flag_reorder_blocks_and_partition
1063 && (USING_SJLJ_EXCEPTIONS
1064 #ifdef TARGET_UNWIND_INFO
1069 inform (input_location
,
1070 "-freorder-blocks-and-partition does not work with exceptions on this architecture");
1071 flag_reorder_blocks_and_partition
= 0;
1072 flag_reorder_blocks
= 1;
1075 /* If user requested unwind info, then turn off the partitioning
1078 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1079 && flag_reorder_blocks_and_partition
1080 && (USING_SJLJ_EXCEPTIONS
1081 #ifdef TARGET_UNWIND_INFO
1086 inform (input_location
,
1087 "-freorder-blocks-and-partition does not support unwind info on this architecture");
1088 flag_reorder_blocks_and_partition
= 0;
1089 flag_reorder_blocks
= 1;
1092 /* If the target requested unwind info, then turn off the partitioning
1093 optimization with a different message. Likewise, if the target does not
1094 support named sections. */
1096 if (flag_reorder_blocks_and_partition
1097 && (!targetm
.have_named_sections
1098 || (flag_unwind_tables
&& targetm
.unwind_tables_default
1099 && (USING_SJLJ_EXCEPTIONS
1100 #ifdef TARGET_UNWIND_INFO
1105 inform (input_location
,
1106 "-freorder-blocks-and-partition does not work on this architecture");
1107 flag_reorder_blocks_and_partition
= 0;
1108 flag_reorder_blocks
= 1;
1111 /* Pipelining of outer loops is only possible when general pipelining
1112 capabilities are requested. */
1113 if (!flag_sel_sched_pipelining
)
1114 flag_sel_sched_pipelining_outer_loops
= 0;
1116 if (!targetm
.ira_cover_classes
1117 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1119 inform (input_location
,
1120 "-fira-algorithm=CB does not work on this architecture");
1121 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1124 if (flag_conserve_stack
)
1126 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1127 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1128 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1129 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1132 if (flag_lto
|| flag_whopr
)
1135 flag_generate_lto
= 1;
1137 /* When generating IL, do not operate in whole-program mode.
1138 Otherwise, symbols will be privatized too early, causing link
1140 flag_whole_program
= 0;
1142 error ("LTO support has not been enabled in this configuration");
1146 /* Reconcile -flto and -fwhopr. Set additional flags as appropriate and
1147 check option consistency. */
1148 if (flag_lto
&& flag_whopr
)
1149 error ("-flto and -fwhopr are mutually exclusive");
1152 #define LEFT_COLUMN 27
1154 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1155 followed by word-wrapped HELP in a second column. */
1157 wrap_help (const char *help
,
1159 unsigned int item_width
,
1160 unsigned int columns
)
1162 unsigned int col_width
= LEFT_COLUMN
;
1163 unsigned int remaining
, room
, len
;
1165 remaining
= strlen (help
);
1169 room
= columns
- 3 - MAX (col_width
, item_width
);
1178 for (i
= 0; help
[i
]; i
++)
1180 if (i
>= room
&& len
!= remaining
)
1184 else if ((help
[i
] == '-' || help
[i
] == '/')
1185 && help
[i
+ 1] != ' '
1186 && i
> 0 && ISALPHA (help
[i
- 1]))
1191 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1193 while (help
[len
] == ' ')
1201 /* Print help for a specific front-end, etc. */
1203 print_filtered_help (unsigned int include_flags
,
1204 unsigned int exclude_flags
,
1205 unsigned int any_flags
,
1206 unsigned int columns
)
1210 static char *printed
= NULL
;
1212 bool displayed
= false;
1214 if (include_flags
== CL_PARAMS
)
1216 for (i
= 0; i
< LAST_PARAM
; i
++)
1218 const char *param
= compiler_params
[i
].option
;
1220 help
= compiler_params
[i
].help
;
1221 if (help
== NULL
|| *help
== '\0')
1223 if (exclude_flags
& CL_UNDOCUMENTED
)
1225 help
= undocumented_msg
;
1228 /* Get the translation. */
1231 wrap_help (help
, param
, strlen (param
), columns
);
1238 printed
= XCNEWVAR (char, cl_options_count
);
1240 for (i
= 0; i
< cl_options_count
; i
++)
1242 static char new_help
[128];
1243 const struct cl_option
*option
= cl_options
+ i
;
1248 if (include_flags
== 0
1249 || ((option
->flags
& include_flags
) != include_flags
))
1251 if ((option
->flags
& any_flags
) == 0)
1255 /* Skip unwanted switches. */
1256 if ((option
->flags
& exclude_flags
) != 0)
1260 /* Skip switches that have already been printed. */
1266 help
= option
->help
;
1269 if (exclude_flags
& CL_UNDOCUMENTED
)
1271 help
= undocumented_msg
;
1274 /* Get the translation. */
1277 /* Find the gap between the name of the
1278 option and its descriptive text. */
1279 tab
= strchr (help
, '\t');
1288 opt
= option
->opt_text
;
1292 /* With the -Q option enabled we change the descriptive text associated
1293 with an option to be an indication of its current setting. */
1296 if (len
< (LEFT_COLUMN
+ 2))
1297 strcpy (new_help
, "\t\t");
1299 strcpy (new_help
, "\t");
1301 if (option
->flag_var
!= NULL
)
1303 if (option
->flags
& CL_JOINED
)
1305 if (option
->var_type
== CLVC_STRING
)
1307 if (* (const char **) option
->flag_var
!= NULL
)
1308 snprintf (new_help
+ strlen (new_help
),
1309 sizeof (new_help
) - strlen (new_help
),
1310 * (const char **) option
->flag_var
);
1313 sprintf (new_help
+ strlen (new_help
),
1314 "%#x", * (int *) option
->flag_var
);
1317 strcat (new_help
, option_enabled (i
)
1318 ? _("[enabled]") : _("[disabled]"));
1324 wrap_help (help
, opt
, len
, columns
);
1330 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1333 printf (_(" No options with the desired characteristics were found\n"));
1338 /* PR 31349: Tell the user how to see all of the
1339 options supported by a specific front end. */
1340 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1341 if ((1U << i
) & langs
)
1342 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1343 lang_names
[i
], lang_names
[i
]);
1347 else if (! displayed
)
1348 printf (_(" All options with the desired characteristics have already been displayed\n"));
1353 /* Display help for a specified type of option.
1354 The options must have ALL of the INCLUDE_FLAGS set
1355 ANY of the flags in the ANY_FLAGS set
1356 and NONE of the EXCLUDE_FLAGS set. */
1358 print_specific_help (unsigned int include_flags
,
1359 unsigned int exclude_flags
,
1360 unsigned int any_flags
)
1362 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1363 const char * description
= NULL
;
1364 const char * descrip_extra
= "";
1367 static unsigned int columns
= 0;
1369 /* Sanity check: Make sure that we do not have more
1370 languages than we have bits available to enumerate them. */
1371 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1373 /* If we have not done so already, obtain
1374 the desired maximum width of the output. */
1379 GET_ENVIRONMENT (p
, "COLUMNS");
1382 int value
= atoi (p
);
1389 /* Use a reasonable default. */
1393 /* Decide upon the title for the options that we are going to display. */
1394 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1396 switch (flag
& include_flags
)
1402 description
= _("The following options are target specific");
1405 description
= _("The following options control compiler warning messages");
1407 case CL_OPTIMIZATION
:
1408 description
= _("The following options control optimizations");
1411 description
= _("The following options are language-independent");
1414 description
= _("The --param option recognizes the following as parameters");
1417 if (i
>= cl_lang_count
)
1419 if (exclude_flags
& all_langs_mask
)
1420 description
= _("The following options are specific to just the language ");
1422 description
= _("The following options are supported by the language ");
1423 descrip_extra
= lang_names
[i
];
1428 if (description
== NULL
)
1432 if (include_flags
& CL_UNDOCUMENTED
)
1433 description
= _("The following options are not documented");
1434 else if (include_flags
& CL_SEPARATE
)
1435 description
= _("The following options take separate arguments");
1436 else if (include_flags
& CL_JOINED
)
1437 description
= _("The following options take joined arguments");
1440 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1447 if (any_flags
& all_langs_mask
)
1448 description
= _("The following options are language-related");
1450 description
= _("The following options are language-independent");
1454 printf ("%s%s:\n", description
, descrip_extra
);
1455 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1458 /* Handle target- and language-independent options. Return zero to
1459 generate an "unknown option" message. Only options that need
1460 extra handling need to be listed here; if you simply want
1461 VALUE assigned to a variable, it happens automatically. */
1464 common_handle_option (size_t scode
, const char *arg
, int value
,
1465 unsigned int lang_mask
)
1467 static bool verbose
= false;
1468 enum opt_code code
= (enum opt_code
) scode
;
1483 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1484 unsigned int undoc_mask
;
1487 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1488 /* First display any single language specific options. */
1489 for (i
= 0; i
< cl_lang_count
; i
++)
1491 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1492 /* Next display any multi language specific options. */
1493 print_specific_help (0, undoc_mask
, all_langs_mask
);
1494 /* Then display any remaining, non-language options. */
1495 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1496 print_specific_help (i
, undoc_mask
, 0);
1497 exit_after_options
= true;
1501 case OPT_ftarget_help
:
1502 case OPT__target_help
:
1503 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1504 exit_after_options
= true;
1506 /* Allow the target a chance to give the user some additional information. */
1507 if (targetm
.target_help
)
1508 targetm
.target_help ();
1514 const char * a
= arg
;
1515 unsigned int include_flags
= 0;
1516 /* Note - by default we include undocumented options when listing
1517 specific classes. If you only want to see documented options
1518 then add ",^undocumented" to the --help= option. E.g.:
1520 --help=target,^undocumented */
1521 unsigned int exclude_flags
= 0;
1523 /* Walk along the argument string, parsing each word in turn.
1525 arg = [^]{word}[,{arg}]
1526 word = {optimizers|target|warnings|undocumented|
1527 params|common|<language>} */
1532 const char * string
;
1537 { "optimizers", CL_OPTIMIZATION
},
1538 { "target", CL_TARGET
},
1539 { "warnings", CL_WARNING
},
1540 { "undocumented", CL_UNDOCUMENTED
},
1541 { "params", CL_PARAMS
},
1542 { "joined", CL_JOINED
},
1543 { "separate", CL_SEPARATE
},
1544 { "common", CL_COMMON
},
1547 unsigned int * pflags
;
1549 unsigned int lang_flag
, specific_flag
;
1556 pflags
= & exclude_flags
;
1559 pflags
= & include_flags
;
1561 comma
= strchr (a
, ',');
1572 /* Check to see if the string matches an option class name. */
1573 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1574 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1576 specific_flag
= specifics
[i
].flag
;
1580 /* Check to see if the string matches a language name.
1581 Note - we rely upon the alpha-sorted nature of the entries in
1582 the lang_names array, specifically that shorter names appear
1583 before their longer variants. (i.e. C before C++). That way
1584 when we are attempting to match --help=c for example we will
1585 match with C first and not C++. */
1586 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1587 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1589 lang_flag
= 1U << i
;
1593 if (specific_flag
!= 0)
1596 * pflags
|= specific_flag
;
1599 /* The option's argument matches both the start of a
1600 language name and the start of an option class name.
1601 We have a special case for when the user has
1602 specified "--help=c", but otherwise we have to issue
1604 if (strncasecmp (a
, "c", len
) == 0)
1605 * pflags
|= lang_flag
;
1608 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1612 else if (lang_flag
!= 0)
1613 * pflags
|= lang_flag
;
1616 "warning: unrecognized argument to --help= option: %.*s\n",
1625 print_specific_help (include_flags
, exclude_flags
, 0);
1626 exit_after_options
= true;
1632 exit_after_options
= true;
1636 g_switch_value
= value
;
1637 g_switch_set
= true;
1642 /* Currently handled in a prescan. */
1646 enable_warning_as_error (arg
, value
, lang_mask
);
1649 case OPT_Wlarger_than_
:
1650 /* This form corresponds to -Wlarger-than-.
1651 Kept for backward compatibility.
1652 Don't use it as the first argument of warning(). */
1654 case OPT_Wlarger_than_eq
:
1655 larger_than_size
= value
;
1656 warn_larger_than
= value
!= -1;
1659 case OPT_Wframe_larger_than_
:
1660 frame_larger_than_size
= value
;
1661 warn_frame_larger_than
= value
!= -1;
1664 case OPT_Wstrict_aliasing
:
1665 set_Wstrict_aliasing (value
);
1668 case OPT_Wstrict_aliasing_
:
1669 warn_strict_aliasing
= value
;
1672 case OPT_Wstrict_overflow
:
1673 warn_strict_overflow
= (value
1674 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1678 case OPT_Wstrict_overflow_
:
1679 warn_strict_overflow
= value
;
1683 warn_unused
= value
;
1688 aux_info_file_name
= arg
;
1689 flag_gen_aux_info
= 1;
1693 aux_base_name
= arg
;
1696 case OPT_auxbase_strip
:
1698 char *tmp
= xstrdup (arg
);
1699 strip_off_ending (tmp
, strlen (tmp
));
1701 aux_base_name
= tmp
;
1706 decode_d_option (arg
);
1710 dump_base_name
= arg
;
1714 dump_dir_name
= arg
;
1717 case OPT_falign_functions_
:
1718 align_functions
= value
;
1721 case OPT_falign_jumps_
:
1722 align_jumps
= value
;
1725 case OPT_falign_labels_
:
1726 align_labels
= value
;
1729 case OPT_falign_loops_
:
1730 align_loops
= value
;
1733 case OPT_fbranch_probabilities
:
1734 flag_branch_probabilities_set
= true;
1737 case OPT_fcall_used_
:
1738 fix_register (arg
, 0, 1);
1741 case OPT_fcall_saved_
:
1742 fix_register (arg
, 0, 0);
1746 dbg_cnt_process_opt (arg
);
1749 case OPT_fdbg_cnt_list
:
1750 dbg_cnt_list_all_counters ();
1753 case OPT_fdebug_prefix_map_
:
1754 add_debug_prefix_map (arg
);
1757 case OPT_fdiagnostics_show_location_
:
1758 if (!strcmp (arg
, "once"))
1759 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1760 else if (!strcmp (arg
, "every-line"))
1761 diagnostic_prefixing_rule (global_dc
)
1762 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1767 case OPT_fdiagnostics_show_option
:
1768 global_dc
->show_option_requested
= true;
1772 if (!dump_switch_p (arg
))
1776 case OPT_fexcess_precision_
:
1777 if (!strcmp (arg
, "fast"))
1778 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1779 else if (!strcmp (arg
, "standard"))
1780 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1782 error ("unknown excess precision style \"%s\"", arg
);
1785 case OPT_ffast_math
:
1786 set_fast_math_flags (value
);
1789 case OPT_funsafe_math_optimizations
:
1790 set_unsafe_math_optimizations_flags (value
);
1794 fix_register (arg
, 1, 1);
1797 case OPT_finline_limit_
:
1798 case OPT_finline_limit_eq
:
1799 set_param_value ("max-inline-insns-single", value
/ 2);
1800 set_param_value ("max-inline-insns-auto", value
/ 2);
1803 case OPT_finstrument_functions_exclude_function_list_
:
1804 add_comma_separated_to_vector
1805 (&flag_instrument_functions_exclude_functions
, arg
);
1808 case OPT_finstrument_functions_exclude_file_list_
:
1809 add_comma_separated_to_vector
1810 (&flag_instrument_functions_exclude_files
, arg
);
1813 case OPT_fmessage_length_
:
1814 pp_set_line_maximum_length (global_dc
->printer
, value
);
1817 case OPT_fpack_struct_
:
1818 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1819 error ("structure alignment must be a small power of two, not %d", value
);
1822 initial_max_fld_align
= value
;
1823 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1827 case OPT_fpeel_loops
:
1828 flag_peel_loops_set
= true;
1832 #ifdef ENABLE_PLUGIN
1833 add_new_plugin (arg
);
1835 error ("Plugin support is disabled. Configure with --enable-plugin.");
1839 case OPT_fplugin_arg_
:
1840 #ifdef ENABLE_PLUGIN
1841 parse_plugin_arg_opt (arg
);
1843 error ("Plugin support is disabled. Configure with --enable-plugin.");
1847 case OPT_fprofile_arcs
:
1848 profile_arc_flag_set
= true;
1851 case OPT_finline_functions
:
1852 flag_inline_functions_set
= true;
1855 case OPT_fprofile_dir_
:
1856 profile_data_prefix
= xstrdup (arg
);
1859 case OPT_fprofile_use_
:
1860 profile_data_prefix
= xstrdup (arg
);
1861 flag_profile_use
= true;
1863 /* No break here - do -fprofile-use processing. */
1864 case OPT_fprofile_use
:
1865 if (!flag_branch_probabilities_set
)
1866 flag_branch_probabilities
= value
;
1867 if (!flag_profile_values_set
)
1868 flag_profile_values
= value
;
1869 if (!flag_unroll_loops_set
)
1870 flag_unroll_loops
= value
;
1871 if (!flag_peel_loops_set
)
1872 flag_peel_loops
= value
;
1873 if (!flag_tracer_set
)
1874 flag_tracer
= value
;
1875 if (!flag_value_profile_transformations_set
)
1876 flag_value_profile_transformations
= value
;
1877 if (!flag_inline_functions_set
)
1878 flag_inline_functions
= value
;
1879 if (!flag_ipa_cp_set
)
1880 flag_ipa_cp
= value
;
1881 if (!flag_ipa_cp_clone_set
1882 && value
&& flag_ipa_cp
)
1883 flag_ipa_cp_clone
= value
;
1884 if (!flag_predictive_commoning_set
)
1885 flag_predictive_commoning
= value
;
1886 if (!flag_unswitch_loops_set
)
1887 flag_unswitch_loops
= value
;
1888 if (!flag_gcse_after_reload_set
)
1889 flag_gcse_after_reload
= value
;
1892 case OPT_fprofile_generate_
:
1893 profile_data_prefix
= xstrdup (arg
);
1895 /* No break here - do -fprofile-generate processing. */
1896 case OPT_fprofile_generate
:
1897 if (!profile_arc_flag_set
)
1898 profile_arc_flag
= value
;
1899 if (!flag_profile_values_set
)
1900 flag_profile_values
= value
;
1901 if (!flag_value_profile_transformations_set
)
1902 flag_value_profile_transformations
= value
;
1903 if (!flag_inline_functions_set
)
1904 flag_inline_functions
= value
;
1907 case OPT_fprofile_values
:
1908 flag_profile_values_set
= true;
1911 case OPT_fvisibility_
:
1913 if (!strcmp(arg
, "default"))
1914 default_visibility
= VISIBILITY_DEFAULT
;
1915 else if (!strcmp(arg
, "internal"))
1916 default_visibility
= VISIBILITY_INTERNAL
;
1917 else if (!strcmp(arg
, "hidden"))
1918 default_visibility
= VISIBILITY_HIDDEN
;
1919 else if (!strcmp(arg
, "protected"))
1920 default_visibility
= VISIBILITY_PROTECTED
;
1922 error ("unrecognized visibility value \"%s\"", arg
);
1927 flag_value_profile_transformations_set
= true;
1930 case OPT_frandom_seed
:
1931 /* The real switch is -fno-random-seed. */
1934 set_random_seed (NULL
);
1937 case OPT_frandom_seed_
:
1938 set_random_seed (arg
);
1941 case OPT_fselective_scheduling
:
1942 case OPT_fselective_scheduling2
:
1943 sel_sched_switch_set
= true;
1946 case OPT_fsched_verbose_
:
1947 #ifdef INSN_SCHEDULING
1948 fix_sched_param ("verbose", arg
);
1954 case OPT_fsched_stalled_insns_
:
1955 flag_sched_stalled_insns
= value
;
1956 if (flag_sched_stalled_insns
== 0)
1957 flag_sched_stalled_insns
= -1;
1960 case OPT_fsched_stalled_insns_dep_
:
1961 flag_sched_stalled_insns_dep
= value
;
1964 case OPT_fstack_check_
:
1965 if (!strcmp (arg
, "no"))
1966 flag_stack_check
= NO_STACK_CHECK
;
1967 else if (!strcmp (arg
, "generic"))
1968 /* This is the old stack checking method. */
1969 flag_stack_check
= STACK_CHECK_BUILTIN
1970 ? FULL_BUILTIN_STACK_CHECK
1971 : GENERIC_STACK_CHECK
;
1972 else if (!strcmp (arg
, "specific"))
1973 /* This is the new stack checking method. */
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 warning (0, "unknown stack check parameter \"%s\"", arg
);
1983 case OPT_fstack_check
:
1984 /* This is the same as the "specific" mode above. */
1986 flag_stack_check
= STACK_CHECK_BUILTIN
1987 ? FULL_BUILTIN_STACK_CHECK
1988 : STACK_CHECK_STATIC_BUILTIN
1989 ? STATIC_BUILTIN_STACK_CHECK
1990 : GENERIC_STACK_CHECK
;
1992 flag_stack_check
= NO_STACK_CHECK
;
1995 case OPT_fstack_limit
:
1996 /* The real switch is -fno-stack-limit. */
1999 stack_limit_rtx
= NULL_RTX
;
2002 case OPT_fstack_limit_register_
:
2004 int reg
= decode_reg_name (arg
);
2006 error ("unrecognized register name \"%s\"", arg
);
2008 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
2012 case OPT_fstack_limit_symbol_
:
2013 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
2016 case OPT_ftree_vectorizer_verbose_
:
2017 vect_set_verbosity_level (arg
);
2020 case OPT_ftls_model_
:
2021 if (!strcmp (arg
, "global-dynamic"))
2022 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
2023 else if (!strcmp (arg
, "local-dynamic"))
2024 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
2025 else if (!strcmp (arg
, "initial-exec"))
2026 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
2027 else if (!strcmp (arg
, "local-exec"))
2028 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
2030 warning (0, "unknown tls-model \"%s\"", arg
);
2033 case OPT_fira_algorithm_
:
2034 if (!strcmp (arg
, "CB"))
2035 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
2036 else if (!strcmp (arg
, "priority"))
2037 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
2039 warning (0, "unknown ira algorithm \"%s\"", arg
);
2042 case OPT_fira_region_
:
2043 if (!strcmp (arg
, "one"))
2044 flag_ira_region
= IRA_REGION_ONE
;
2045 else if (!strcmp (arg
, "all"))
2046 flag_ira_region
= IRA_REGION_ALL
;
2047 else if (!strcmp (arg
, "mixed"))
2048 flag_ira_region
= IRA_REGION_MIXED
;
2050 warning (0, "unknown ira region \"%s\"", arg
);
2053 case OPT_fira_verbose_
:
2054 flag_ira_verbose
= value
;
2058 flag_tracer_set
= true;
2062 flag_ipa_cp_set
= true;
2065 case OPT_fipa_cp_clone
:
2066 flag_ipa_cp_clone_set
= true;
2069 case OPT_fpredictive_commoning
:
2070 flag_predictive_commoning_set
= true;
2073 case OPT_funswitch_loops
:
2074 flag_unswitch_loops_set
= true;
2077 case OPT_fgcse_after_reload
:
2078 flag_gcse_after_reload_set
= true;
2081 case OPT_funroll_loops
:
2082 flag_unroll_loops_set
= true;
2086 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2090 set_debug_level (SDB_DEBUG
, false, arg
);
2094 if (value
< 2 || value
> 4)
2095 error ("dwarf version %d is not supported", value
);
2097 dwarf_version
= value
;
2098 set_debug_level (DWARF2_DEBUG
, false, "");
2102 set_debug_level (NO_DEBUG
, 2, arg
);
2107 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2111 set_debug_level (VMS_DEBUG
, false, arg
);
2116 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2120 asm_file_name
= arg
;
2123 case OPT_pedantic_errors
:
2124 flag_pedantic_errors
= pedantic
= 1;
2128 case OPT_fcse_skip_blocks
:
2129 case OPT_floop_optimize
:
2130 case OPT_frerun_loop_opt
:
2131 case OPT_fsched2_use_traces
:
2132 case OPT_fstrength_reduce
:
2133 case OPT_ftree_store_copy_prop
:
2134 case OPT_fforce_addr
:
2135 case OPT_ftree_salias
:
2136 case OPT_ftree_store_ccp
:
2137 case OPT_Wunreachable_code
:
2138 /* These are no-ops, preserved for backward compatibility. */
2141 case OPT_fuse_linker_plugin
:
2142 /* No-op. Used by the driver and passed to us because it starts with f.*/
2146 /* If the flag was handled in a standard way, assume the lack of
2147 processing here is intentional. */
2148 gcc_assert (cl_options
[scode
].flag_var
);
2155 /* Handle --param NAME=VALUE. */
2157 handle_param (const char *carg
)
2162 arg
= xstrdup (carg
);
2163 equal
= strchr (arg
, '=');
2165 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2168 value
= integral_argument (equal
+ 1);
2170 error ("invalid --param value %qs", equal
+ 1);
2174 set_param_value (arg
, value
);
2181 /* Used to set the level of strict aliasing warnings,
2182 when no level is specified (i.e., when -Wstrict-aliasing, and not
2183 -Wstrict-aliasing=level was given).
2184 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2185 and 0 otherwise. After calling this function, wstrict_aliasing will be
2186 set to the default value of -Wstrict_aliasing=level, currently 3. */
2188 set_Wstrict_aliasing (int onoff
)
2190 gcc_assert (onoff
== 0 || onoff
== 1);
2192 warn_strict_aliasing
= 3;
2194 warn_strict_aliasing
= 0;
2197 /* The following routines are useful in setting all the flags that
2198 -ffast-math and -fno-fast-math imply. */
2200 set_fast_math_flags (int set
)
2202 flag_unsafe_math_optimizations
= set
;
2203 set_unsafe_math_optimizations_flags (set
);
2204 flag_finite_math_only
= set
;
2205 flag_errno_math
= !set
;
2208 flag_signaling_nans
= 0;
2209 flag_rounding_math
= 0;
2210 flag_cx_limited_range
= 1;
2214 /* When -funsafe-math-optimizations is set the following
2215 flags are set as well. */
2217 set_unsafe_math_optimizations_flags (int set
)
2219 flag_trapping_math
= !set
;
2220 flag_signed_zeros
= !set
;
2221 flag_associative_math
= set
;
2222 flag_reciprocal_math
= set
;
2225 /* Return true iff flags are set as if -ffast-math. */
2227 fast_math_flags_set_p (void)
2229 return (!flag_trapping_math
2230 && flag_unsafe_math_optimizations
2231 && flag_finite_math_only
2232 && !flag_signed_zeros
2233 && !flag_errno_math
);
2236 /* Return true iff flags are set as if -ffast-math but using the flags stored
2237 in the struct cl_optimization structure. */
2239 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2241 return (!opt
->flag_trapping_math
2242 && opt
->flag_unsafe_math_optimizations
2243 && opt
->flag_finite_math_only
2244 && !opt
->flag_signed_zeros
2245 && !opt
->flag_errno_math
);
2248 /* Handle a debug output -g switch. EXTENDED is true or false to support
2249 extended output (2 is special and means "-ggdb" was given). */
2251 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2253 static bool type_explicit
;
2255 use_gnu_debug_info_extensions
= extended
;
2257 if (type
== NO_DEBUG
)
2259 if (write_symbols
== NO_DEBUG
)
2261 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2265 #ifdef DWARF2_DEBUGGING_INFO
2266 write_symbols
= DWARF2_DEBUG
;
2267 #elif defined DBX_DEBUGGING_INFO
2268 write_symbols
= DBX_DEBUG
;
2272 if (write_symbols
== NO_DEBUG
)
2273 warning (0, "target system does not support debug output");
2278 /* Does it conflict with an already selected type? */
2279 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2280 error ("debug format \"%s\" conflicts with prior selection",
2281 debug_type_names
[type
]);
2282 write_symbols
= type
;
2283 type_explicit
= true;
2286 /* A debug flag without a level defaults to level 2. */
2289 if (!debug_info_level
)
2290 debug_info_level
= DINFO_LEVEL_NORMAL
;
2294 int argval
= integral_argument (arg
);
2296 error ("unrecognised debug output level \"%s\"", arg
);
2297 else if (argval
> 3)
2298 error ("debug output level %s is too high", arg
);
2300 debug_info_level
= (enum debug_info_level
) argval
;
2304 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2305 a simple on-off switch. */
2308 option_enabled (int opt_idx
)
2310 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2312 if (option
->flag_var
)
2313 switch (option
->var_type
)
2316 return *(int *) option
->flag_var
!= 0;
2319 return *(int *) option
->flag_var
== option
->var_value
;
2321 case CLVC_BIT_CLEAR
:
2322 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2325 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2333 /* Fill STATE with the current state of option OPTION. Return true if
2334 there is some state to store. */
2337 get_option_state (int option
, struct cl_option_state
*state
)
2339 if (cl_options
[option
].flag_var
== 0)
2342 switch (cl_options
[option
].var_type
)
2346 state
->data
= cl_options
[option
].flag_var
;
2347 state
->size
= sizeof (int);
2350 case CLVC_BIT_CLEAR
:
2352 state
->ch
= option_enabled (option
);
2353 state
->data
= &state
->ch
;
2358 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2359 if (state
->data
== 0)
2361 state
->size
= strlen ((const char *) state
->data
) + 1;
2367 /* Set *OPTION according to VALUE and ARG. */
2370 set_option (const struct cl_option
*option
, int value
, const char *arg
)
2372 if (!option
->flag_var
)
2375 switch (option
->var_type
)
2378 *(int *) option
->flag_var
= value
;
2382 *(int *) option
->flag_var
= (value
2384 : !option
->var_value
);
2387 case CLVC_BIT_CLEAR
:
2389 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
2390 *(int *) option
->flag_var
|= option
->var_value
;
2392 *(int *) option
->flag_var
&= ~option
->var_value
;
2393 if (option
->flag_var
== &target_flags
)
2394 target_flags_explicit
|= option
->var_value
;
2398 *(const char **) option
->flag_var
= arg
;
2403 /* Enable a warning option as an error. This is used by -Werror= and
2404 also by legacy Werror-implicit-function-declaration. */
2407 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2412 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2413 new_option
[0] = 'W';
2414 strcpy (new_option
+ 1, arg
);
2415 option_index
= find_opt (new_option
, lang_mask
);
2416 if (option_index
== N_OPTS
)
2418 error ("-Werror=%s: No option -%s", arg
, new_option
);
2422 diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2423 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2425 /* -Werror=foo implies -Wfoo. */
2426 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2427 && cl_options
[option_index
].flag_var
2428 && kind
== DK_ERROR
)
2429 *(int *) cl_options
[option_index
].flag_var
= 1;