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 /* Value of the -G xx switch, and whether it was passed or not. */
48 unsigned HOST_WIDE_INT g_switch_value
;
51 /* Same for selective scheduling. */
52 bool sel_sched_switch_set
;
54 /* True if we should exit after parsing options. */
55 bool exit_after_options
;
57 /* True to warn about any objects definitions whose size is larger
58 than N bytes. Also want about function definitions whose returned
59 values are larger than N bytes, where N is `larger_than_size'. */
60 bool warn_larger_than
;
61 HOST_WIDE_INT larger_than_size
;
63 /* True to warn about any function whose frame size is larger
65 bool warn_frame_larger_than
;
66 HOST_WIDE_INT frame_larger_than_size
;
68 /* Type(s) of debugging information we are producing (if any). See
69 flags.h for the definitions of the different possible types of
70 debugging information. */
71 enum debug_info_type write_symbols
= NO_DEBUG
;
73 /* Level of debugging information we are producing. See flags.h for
74 the definitions of the different possible levels. */
75 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
77 /* A major contribution to object and executable size is debug
78 information size. A major contribution to debug information size
79 is struct descriptions replicated in several object files. The
80 following flags attempt to reduce this information. The basic
81 idea is to not emit struct debugging information in the current
82 compilation unit when that information will be generated by
83 another compilation unit.
85 Debug information for a struct defined in the current source
86 file should be generated in the object file. Likewise the
87 debug information for a struct defined in a header should be
88 generated in the object file of the corresponding source file.
89 Both of these case are handled when the base name of the file of
90 the struct definition matches the base name of the source file
91 of the current compilation unit. This matching emits minimal
92 struct debugging information.
94 The base file name matching rule above will fail to emit debug
95 information for structs defined in system headers. So a second
96 category of files includes system headers in addition to files
99 The remaining types of files are library headers and application
100 headers. We cannot currently distinguish these two types. */
102 enum debug_struct_file
104 DINFO_STRUCT_FILE_NONE
, /* Debug no structs. */
105 DINFO_STRUCT_FILE_BASE
, /* Debug structs defined in files with the
106 same base name as the compilation unit. */
107 DINFO_STRUCT_FILE_SYS
, /* Also debug structs defined in system
109 DINFO_STRUCT_FILE_ANY
/* Debug structs defined in all files. */
112 /* Generic structs (e.g. templates not explicitly specialized)
113 may not have a compilation unit associated with them, and so
114 may need to be treated differently from ordinary structs.
116 Structs only handled by reference (indirectly), will also usually
117 not need as much debugging information. */
119 static enum debug_struct_file debug_struct_ordinary
[DINFO_USAGE_NUM_ENUMS
]
120 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
121 static enum debug_struct_file debug_struct_generic
[DINFO_USAGE_NUM_ENUMS
]
122 = { DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
, DINFO_STRUCT_FILE_ANY
};
124 /* Parse the -femit-struct-debug-detailed option value
125 and set the flag variables. */
127 #define MATCH( prefix, string ) \
128 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
129 ? ((string += sizeof prefix - 1), 1) : 0)
132 set_struct_debug_option (const char *spec
)
134 /* various labels for comparison */
135 static char dfn_lbl
[] = "dfn:", dir_lbl
[] = "dir:", ind_lbl
[] = "ind:";
136 static char ord_lbl
[] = "ord:", gen_lbl
[] = "gen:";
137 static char none_lbl
[] = "none", any_lbl
[] = "any";
138 static char base_lbl
[] = "base", sys_lbl
[] = "sys";
140 enum debug_struct_file files
= DINFO_STRUCT_FILE_ANY
;
141 /* Default is to apply to as much as possible. */
142 enum debug_info_usage usage
= DINFO_USAGE_NUM_ENUMS
;
143 int ord
= 1, gen
= 1;
146 if (MATCH (dfn_lbl
, spec
))
147 usage
= DINFO_USAGE_DFN
;
148 else if (MATCH (dir_lbl
, spec
))
149 usage
= DINFO_USAGE_DIR_USE
;
150 else if (MATCH (ind_lbl
, spec
))
151 usage
= DINFO_USAGE_IND_USE
;
153 /* Generics or not? */
154 if (MATCH (ord_lbl
, spec
))
156 else if (MATCH (gen_lbl
, spec
))
159 /* What allowable environment? */
160 if (MATCH (none_lbl
, spec
))
161 files
= DINFO_STRUCT_FILE_NONE
;
162 else if (MATCH (any_lbl
, spec
))
163 files
= DINFO_STRUCT_FILE_ANY
;
164 else if (MATCH (sys_lbl
, spec
))
165 files
= DINFO_STRUCT_FILE_SYS
;
166 else if (MATCH (base_lbl
, spec
))
167 files
= DINFO_STRUCT_FILE_BASE
;
169 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
172 /* Effect the specification. */
173 if (usage
== DINFO_USAGE_NUM_ENUMS
)
177 debug_struct_ordinary
[DINFO_USAGE_DFN
] = files
;
178 debug_struct_ordinary
[DINFO_USAGE_DIR_USE
] = files
;
179 debug_struct_ordinary
[DINFO_USAGE_IND_USE
] = files
;
183 debug_struct_generic
[DINFO_USAGE_DFN
] = files
;
184 debug_struct_generic
[DINFO_USAGE_DIR_USE
] = files
;
185 debug_struct_generic
[DINFO_USAGE_IND_USE
] = files
;
191 debug_struct_ordinary
[usage
] = files
;
193 debug_struct_generic
[usage
] = files
;
197 set_struct_debug_option (spec
+1);
200 /* No more -femit-struct-debug-detailed specifications.
203 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
205 if (debug_struct_ordinary
[DINFO_USAGE_DIR_USE
]
206 < debug_struct_ordinary
[DINFO_USAGE_IND_USE
]
207 || debug_struct_generic
[DINFO_USAGE_DIR_USE
]
208 < debug_struct_generic
[DINFO_USAGE_IND_USE
])
209 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
210 " as much as %<-femit-struct-debug-detailed=ind:...%>");
214 /* Find the base name of a path, stripping off both directories and
215 a single final extension. */
217 base_of_path (const char *path
, const char **base_out
)
219 const char *base
= path
;
221 const char *p
= path
;
225 if (IS_DIR_SEPARATOR(c
))
240 /* Match the base name of a file to the base name of a compilation unit. */
242 static const char *main_input_basename
;
243 static int main_input_baselength
;
246 matches_main_base (const char *path
)
248 /* Cache the last query. */
249 static const char *last_path
= NULL
;
250 static int last_match
= 0;
251 if (path
!= last_path
)
254 int length
= base_of_path (path
, &base
);
256 last_match
= (length
== main_input_baselength
257 && memcmp (base
, main_input_basename
, length
) == 0);
262 #ifdef DEBUG_DEBUG_STRUCT
265 dump_struct_debug (tree type
, enum debug_info_usage usage
,
266 enum debug_struct_file criterion
, int generic
,
267 int matches
, int result
)
269 /* Find the type name. */
270 tree type_decl
= TYPE_STUB_DECL (type
);
272 const char *name
= 0;
273 if (TREE_CODE (t
) == TYPE_DECL
)
276 name
= IDENTIFIER_POINTER (t
);
278 fprintf (stderr
, " struct %d %s %s %s %s %d %p %s\n",
280 DECL_IN_SYSTEM_HEADER (type_decl
) ? "sys" : "usr",
281 matches
? "bas" : "hdr",
282 generic
? "gen" : "ord",
283 usage
== DINFO_USAGE_DFN
? ";" :
284 usage
== DINFO_USAGE_DIR_USE
? "." : "*",
286 (void*) type_decl
, name
);
289 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
290 dump_struct_debug (type, usage, criterion, generic, matches, result)
294 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
301 should_emit_struct_debug (tree type
, enum debug_info_usage usage
)
303 enum debug_struct_file criterion
;
305 bool generic
= lang_hooks
.types
.generic_p (type
);
308 criterion
= debug_struct_generic
[usage
];
310 criterion
= debug_struct_ordinary
[usage
];
312 if (criterion
== DINFO_STRUCT_FILE_NONE
)
313 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
314 if (criterion
== DINFO_STRUCT_FILE_ANY
)
315 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
317 type_decl
= TYPE_STUB_DECL (type
);
319 if (criterion
== DINFO_STRUCT_FILE_SYS
&& DECL_IN_SYSTEM_HEADER (type_decl
))
320 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, true);
322 if (matches_main_base (DECL_SOURCE_FILE (type_decl
)))
323 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, true, true);
324 return DUMP_GSTRUCT (type
, usage
, criterion
, generic
, false, false);
327 /* Nonzero means use GNU-only extensions in the generated symbolic
328 debugging information. Currently, this only has an effect when
329 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
330 bool use_gnu_debug_info_extensions
;
332 /* The default visibility for all symbols (unless overridden) */
333 enum symbol_visibility default_visibility
= VISIBILITY_DEFAULT
;
335 /* Global visibility options. */
336 struct visibility_flags visibility_options
;
338 /* What to print when a switch has no documentation. */
339 static const char undocumented_msg
[] = N_("This switch lacks documentation");
341 /* Used for bookkeeping on whether user set these flags so
342 -fprofile-use/-fprofile-generate does not use them. */
343 static bool profile_arc_flag_set
, flag_profile_values_set
;
344 static bool flag_unroll_loops_set
, flag_tracer_set
;
345 static bool flag_value_profile_transformations_set
;
346 static bool flag_peel_loops_set
, flag_branch_probabilities_set
;
347 static bool flag_inline_functions_set
, flag_ipa_cp_set
, flag_ipa_cp_clone_set
;
348 static bool flag_predictive_commoning_set
, flag_unswitch_loops_set
, flag_gcse_after_reload_set
;
350 /* Functions excluded from profiling. */
352 typedef char *char_p
; /* For DEF_VEC_P. */
354 DEF_VEC_ALLOC_P(char_p
,heap
);
356 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_functions
;
357 static VEC(char_p
,heap
) *flag_instrument_functions_exclude_files
;
359 typedef const char *const_char_p
; /* For DEF_VEC_P. */
360 DEF_VEC_P(const_char_p
);
361 DEF_VEC_ALLOC_P(const_char_p
,heap
);
363 static VEC(const_char_p
,heap
) *ignored_options
;
365 /* Input file names. */
366 const char **in_fnames
;
367 unsigned num_in_fnames
;
369 static int common_handle_option (size_t scode
, const char *arg
, int value
,
370 unsigned int lang_mask
);
371 static void handle_param (const char *);
372 static unsigned int handle_option (const char **argv
, unsigned int lang_mask
);
373 static char *write_langs (unsigned int lang_mask
);
374 static void complain_wrong_lang (const char *, const struct cl_option
*,
375 unsigned int lang_mask
);
376 static void handle_options (unsigned int, const char **, unsigned int);
377 static void set_debug_level (enum debug_info_type type
, int extended
,
380 /* If ARG is a non-negative integer made up solely of digits, return its
381 value, otherwise return -1. */
383 integral_argument (const char *arg
)
387 while (*p
&& ISDIGIT (*p
))
396 /* Return a malloced slash-separated list of languages in MASK. */
398 write_langs (unsigned int mask
)
400 unsigned int n
= 0, len
= 0;
401 const char *lang_name
;
404 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
405 if (mask
& (1U << n
))
406 len
+= strlen (lang_name
) + 1;
408 result
= XNEWVEC (char, len
);
410 for (n
= 0; (lang_name
= lang_names
[n
]) != 0; n
++)
411 if (mask
& (1U << n
))
415 strcpy (result
+ len
, lang_name
);
416 len
+= strlen (lang_name
);
424 /* Complain that switch OPT_INDEX does not apply to this front end. */
426 complain_wrong_lang (const char *text
, const struct cl_option
*option
,
427 unsigned int lang_mask
)
429 char *ok_langs
, *bad_lang
;
431 ok_langs
= write_langs (option
->flags
);
432 bad_lang
= write_langs (lang_mask
);
434 /* Eventually this should become a hard error IMO. */
435 warning (0, "command line option \"%s\" is valid for %s but not for %s",
436 text
, ok_langs
, bad_lang
);
442 /* Buffer the unknown option described by the string OPT. Currently,
443 we only complain about unknown -Wno-* options if they may have
444 prevented a diagnostic. Otherwise, we just ignore them.
445 Note that if we do complain, it is only as a warning, not an error;
446 passing the compiler an unrecognised -Wno-* option should never
447 change whether the compilation succeeds or fails. */
449 static void postpone_unknown_option_warning(const char *opt
)
451 VEC_safe_push (const_char_p
, heap
, ignored_options
, opt
);
454 /* Produce a warning for each option previously buffered. */
456 void print_ignored_options (void)
458 location_t saved_loc
= input_location
;
462 while (!VEC_empty (const_char_p
, ignored_options
))
465 opt
= VEC_pop (const_char_p
, ignored_options
);
466 warning (0, "unrecognized command line option \"%s\"", opt
);
469 input_location
= saved_loc
;
472 /* Handle the switch beginning at ARGV for the language indicated by
473 LANG_MASK. Returns the number of switches consumed. */
475 handle_option (const char **argv
, unsigned int lang_mask
)
478 const char *opt
, *arg
= 0;
481 unsigned int result
= 0;
482 const struct cl_option
*option
;
486 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
487 if (opt_index
== cl_options_count
488 && (opt
[1] == 'W' || opt
[1] == 'f' || opt
[1] == 'm')
489 && opt
[2] == 'n' && opt
[3] == 'o' && opt
[4] == '-')
491 /* Drop the "no-" from negative switches. */
492 size_t len
= strlen (opt
) - 3;
494 dup
= XNEWVEC (char, len
+ 1);
497 memcpy (dup
+ 2, opt
+ 5, len
- 2 + 1);
500 opt_index
= find_opt (opt
+ 1, lang_mask
| CL_COMMON
| CL_TARGET
);
501 if (opt_index
== cl_options_count
&& opt
[1] == 'W')
503 /* We don't generate warnings for unknown -Wno-* options
504 unless we issue diagnostics. */
505 postpone_unknown_option_warning (argv
[0]);
511 if (opt_index
== cl_options_count
)
514 option
= &cl_options
[opt_index
];
516 /* Reject negative form of switches that don't take negatives as
518 if (!value
&& (option
->flags
& CL_REJECT_NEGATIVE
))
521 /* We've recognized this switch. */
524 /* Check to see if the option is disabled for this configuration. */
525 if (option
->flags
& CL_DISABLED
)
527 error ("command line option %qs"
528 " is not supported by this configuration", opt
);
532 /* Sort out any argument the switch takes. */
533 if (option
->flags
& CL_JOINED
)
535 /* Have arg point to the original switch. This is because
536 some code, such as disable_builtin_function, expects its
537 argument to be persistent until the program exits. */
538 arg
= argv
[0] + cl_options
[opt_index
].opt_len
+ 1;
540 arg
+= strlen ("no-");
542 if (*arg
== '\0' && !(option
->flags
& CL_MISSING_OK
))
544 if (option
->flags
& CL_SEPARATE
)
550 /* Missing argument. */
554 else if (option
->flags
& CL_SEPARATE
)
560 /* Now we've swallowed any potential argument, complain if this
561 is a switch for a different front end. */
562 if (!(option
->flags
& (lang_mask
| CL_COMMON
| CL_TARGET
)))
564 complain_wrong_lang (argv
[0], option
, lang_mask
);
567 else if ((option
->flags
& CL_TARGET
)
568 && (option
->flags
& CL_LANG_ALL
)
569 && !(option
->flags
& lang_mask
))
571 /* Complain for target flag language mismatches if any languages
573 complain_wrong_lang (argv
[0], option
, lang_mask
);
577 if (arg
== NULL
&& (option
->flags
& (CL_JOINED
| CL_SEPARATE
)))
579 if (!lang_hooks
.missing_argument (opt
, opt_index
))
580 error ("missing argument to \"%s\"", opt
);
584 /* If the switch takes an integer, convert it. */
585 if (arg
&& (option
->flags
& CL_UINTEGER
))
587 value
= integral_argument (arg
);
590 error ("argument to \"%s\" should be a non-negative integer",
596 if (option
->flag_var
)
597 switch (option
->var_type
)
600 *(int *) option
->flag_var
= value
;
604 *(int *) option
->flag_var
= (value
606 : !option
->var_value
);
611 if ((value
!= 0) == (option
->var_type
== CLVC_BIT_SET
))
612 *(int *) option
->flag_var
|= option
->var_value
;
614 *(int *) option
->flag_var
&= ~option
->var_value
;
615 if (option
->flag_var
== &target_flags
)
616 target_flags_explicit
|= option
->var_value
;
620 *(const char **) option
->flag_var
= arg
;
624 if (option
->flags
& lang_mask
)
625 if (lang_hooks
.handle_option (opt_index
, arg
, value
) == 0)
628 if (result
&& (option
->flags
& CL_COMMON
))
629 if (common_handle_option (opt_index
, arg
, value
, lang_mask
) == 0)
632 if (result
&& (option
->flags
& CL_TARGET
))
633 if (!targetm
.handle_option (opt_index
, arg
, value
))
642 /* Handle FILENAME from the command line. */
644 add_input_filename (const char *filename
)
647 in_fnames
= XRESIZEVEC (const char *, in_fnames
, num_in_fnames
);
648 in_fnames
[num_in_fnames
- 1] = filename
;
651 /* Add comma-separated strings to a char_p vector. */
654 add_comma_separated_to_vector (VEC(char_p
,heap
) **pvec
, const char* arg
)
661 /* We never free this string. */
674 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
677 if (*r
== '\\' && r
[1] == ',')
685 if (*token_start
!= '\0')
686 VEC_safe_push (char_p
, heap
, *pvec
, token_start
);
689 /* Return whether we should exclude FNDECL from instrumentation. */
692 flag_instrument_functions_exclude_p (tree fndecl
)
694 if (VEC_length (char_p
, flag_instrument_functions_exclude_functions
) > 0)
700 name
= lang_hooks
.decl_printable_name (fndecl
, 0);
702 VEC_iterate (char_p
, flag_instrument_functions_exclude_functions
,
706 if (strstr (name
, s
) != NULL
)
711 if (VEC_length (char_p
, flag_instrument_functions_exclude_files
) > 0)
717 name
= DECL_SOURCE_FILE (fndecl
);
719 VEC_iterate (char_p
, flag_instrument_functions_exclude_files
, i
, s
);
722 if (strstr (name
, s
) != NULL
)
731 /* Decode and handle the vector of command line options. LANG_MASK
732 contains has a single bit set representing the current
735 handle_options (unsigned int argc
, const char **argv
, unsigned int lang_mask
)
739 for (i
= 1; i
< argc
; i
+= n
)
741 const char *opt
= argv
[i
];
743 /* Interpret "-" or a non-switch as a file name. */
744 if (opt
[0] != '-' || opt
[1] == '\0')
746 if (main_input_filename
== NULL
)
748 main_input_filename
= opt
;
749 main_input_baselength
750 = base_of_path (main_input_filename
, &main_input_basename
);
752 add_input_filename (opt
);
757 n
= handle_option (argv
+ i
, lang_mask
);
762 error ("unrecognized command line option \"%s\"", opt
);
767 /* Parse command line options and set default flag values. Do minimal
768 options processing. */
770 decode_options (unsigned int argc
, const char **argv
)
772 static bool first_time_p
= true;
773 static int initial_min_crossjump_insns
;
774 static int initial_max_fields_for_field_sensitive
;
775 static int initial_loop_invariant_max_bbs_in_loop
;
776 static unsigned int initial_lang_mask
;
778 unsigned int i
, lang_mask
;
786 /* Perform language-specific options initialization. */
787 initial_lang_mask
= lang_mask
= lang_hooks
.init_options (argc
, argv
);
789 lang_hooks
.initialize_diagnostics (global_dc
);
791 /* Save initial values of parameters we reset. */
792 initial_min_crossjump_insns
793 = compiler_params
[PARAM_MIN_CROSSJUMP_INSNS
].value
;
794 initial_max_fields_for_field_sensitive
795 = compiler_params
[PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE
].value
;
796 initial_loop_invariant_max_bbs_in_loop
797 = compiler_params
[PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP
].value
;
800 lang_mask
= initial_lang_mask
;
802 /* Scan to see what optimization level has been specified. That will
803 determine the default value of many flags. */
804 for (i
= 1; i
< argc
; i
++)
806 if (!strcmp (argv
[i
], "-O"))
811 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
813 /* Handle -Os, -O2, -O3, -O69, ... */
814 const char *p
= &argv
[i
][2];
816 if ((p
[0] == 's') && (p
[1] == 0))
820 /* Optimizing for size forces optimize to be 2. */
825 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
826 if (optimize_val
!= -1)
828 optimize
= optimize_val
;
835 /* Use priority coloring if cover classes is not defined for the
837 if (targetm
.ira_cover_classes
== NULL
)
838 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
840 /* -O1 optimizations. */
841 opt1
= (optimize
>= 1);
842 flag_defer_pop
= opt1
;
844 flag_delayed_branch
= opt1
;
846 #ifdef CAN_DEBUG_WITHOUT_FP
847 flag_omit_frame_pointer
= opt1
;
849 flag_guess_branch_prob
= opt1
;
850 flag_cprop_registers
= opt1
;
851 flag_if_conversion
= opt1
;
852 flag_if_conversion2
= opt1
;
853 flag_ipa_pure_const
= opt1
;
854 flag_ipa_reference
= opt1
;
855 flag_merge_constants
= opt1
;
856 flag_split_wide_types
= opt1
;
857 flag_tree_ccp
= opt1
;
858 flag_tree_dce
= opt1
;
859 flag_tree_dom
= opt1
;
860 flag_tree_dse
= opt1
;
861 flag_tree_ter
= opt1
;
862 flag_tree_sra
= opt1
;
863 flag_tree_copyrename
= opt1
;
864 flag_tree_fre
= opt1
;
865 flag_tree_copy_prop
= opt1
;
866 flag_tree_sink
= opt1
;
869 /* -O2 optimizations. */
870 opt2
= (optimize
>= 2);
871 flag_inline_small_functions
= opt2
;
872 flag_indirect_inlining
= opt2
;
873 flag_thread_jumps
= opt2
;
874 flag_crossjumping
= opt2
;
875 flag_optimize_sibling_calls
= opt2
;
876 flag_forward_propagate
= opt2
;
877 flag_cse_follow_jumps
= opt2
;
879 flag_expensive_optimizations
= opt2
;
880 flag_rerun_cse_after_loop
= opt2
;
881 flag_caller_saves
= opt2
;
882 flag_peephole2
= opt2
;
883 #ifdef INSN_SCHEDULING
884 flag_schedule_insns
= opt2
;
885 flag_schedule_insns_after_reload
= opt2
;
888 flag_strict_aliasing
= opt2
;
889 flag_strict_overflow
= opt2
;
890 flag_reorder_blocks
= opt2
;
891 flag_reorder_functions
= opt2
;
892 flag_tree_vrp
= opt2
;
893 flag_tree_builtin_call_dce
= opt2
;
894 flag_tree_pre
= opt2
;
895 flag_tree_switch_conversion
= 1;
898 /* Track fields in field-sensitive alias analysis. */
899 set_param_value ("max-fields-for-field-sensitive",
900 (opt2
) ? 100 : initial_max_fields_for_field_sensitive
);
902 /* For -O1 only do loop invariant motion for very small loops. */
903 set_param_value ("loop-invariant-max-bbs-in-loop",
904 (opt2
) ? initial_loop_invariant_max_bbs_in_loop
: 1000);
906 /* -O3 optimizations. */
907 opt3
= (optimize
>= 3);
908 flag_predictive_commoning
= opt3
;
909 flag_inline_functions
= opt3
;
910 flag_unswitch_loops
= opt3
;
911 flag_gcse_after_reload
= opt3
;
912 flag_tree_vectorize
= opt3
;
913 flag_ipa_cp_clone
= opt3
;
914 if (flag_ipa_cp_clone
)
917 /* Just -O1/-O0 optimizations. */
918 opt1_max
= (optimize
<= 1);
919 align_loops
= opt1_max
;
920 align_jumps
= opt1_max
;
921 align_labels
= opt1_max
;
922 align_functions
= opt1_max
;
926 /* Inlining of functions reducing size is a good idea regardless of them
927 being declared inline. */
928 flag_inline_functions
= 1;
930 /* Basic optimization options. */
935 /* We want to crossjump as much as possible. */
936 set_param_value ("min-crossjump-insns", 1);
939 set_param_value ("min-crossjump-insns", initial_min_crossjump_insns
);
943 /* Initialize whether `char' is signed. */
944 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
945 /* Set this to a special "uninitialized" value. The actual default is
946 set after target options have been processed. */
947 flag_short_enums
= 2;
949 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
951 target_flags
= targetm
.default_target_flags
;
953 /* Some targets have ABI-specified unwind tables. */
954 flag_unwind_tables
= targetm
.unwind_tables_default
;
957 #ifdef OPTIMIZATION_OPTIONS
958 /* Allow default optimizations to be specified on a per-machine basis. */
959 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
962 handle_options (argc
, argv
, lang_mask
);
964 /* Handle related options for unit-at-a-time, toplevel-reorder, and
966 if (!flag_unit_at_a_time
)
968 if (flag_section_anchors
== 1)
969 error ("Section anchors must be disabled when unit-at-a-time "
971 flag_section_anchors
= 0;
972 if (flag_toplevel_reorder
== 1)
973 error ("Toplevel reorder must be disabled when unit-at-a-time "
975 flag_toplevel_reorder
= 0;
977 /* Unless the user has asked for section anchors, we disable toplevel
978 reordering at -O0 to disable transformations that might be surprising
979 to end users and to get -fno-toplevel-reorder tested. */
980 if (!optimize
&& flag_toplevel_reorder
== 2 && flag_section_anchors
!= 1)
982 flag_toplevel_reorder
= 0;
983 flag_section_anchors
= 0;
985 if (!flag_toplevel_reorder
)
987 if (flag_section_anchors
== 1)
988 error ("section anchors must be disabled when toplevel reorder"
990 flag_section_anchors
= 0;
997 if (flag_pic
&& !flag_pie
)
1003 /* Inlining does not work if not optimizing,
1004 so force it not to be done. */
1009 /* The optimization to partition hot and cold basic blocks into separate
1010 sections of the .o and executable files does not work (currently)
1011 with exception handling. This is because there is no support for
1012 generating unwind info. If flag_exceptions is turned on we need to
1013 turn off the partitioning optimization. */
1015 if (flag_exceptions
&& flag_reorder_blocks_and_partition
)
1017 inform (input_location
,
1018 "-freorder-blocks-and-partition does not work with exceptions");
1019 flag_reorder_blocks_and_partition
= 0;
1020 flag_reorder_blocks
= 1;
1023 /* If user requested unwind info, then turn off the partitioning
1026 if (flag_unwind_tables
&& ! targetm
.unwind_tables_default
1027 && flag_reorder_blocks_and_partition
)
1029 inform (input_location
, "-freorder-blocks-and-partition does not support unwind info");
1030 flag_reorder_blocks_and_partition
= 0;
1031 flag_reorder_blocks
= 1;
1034 /* If the target requested unwind info, then turn off the partitioning
1035 optimization with a different message. Likewise, if the target does not
1036 support named sections. */
1038 if (flag_reorder_blocks_and_partition
1039 && (!targetm
.have_named_sections
1040 || (flag_unwind_tables
&& targetm
.unwind_tables_default
)))
1042 inform (input_location
,
1043 "-freorder-blocks-and-partition does not work on this architecture");
1044 flag_reorder_blocks_and_partition
= 0;
1045 flag_reorder_blocks
= 1;
1048 /* Pipelining of outer loops is only possible when general pipelining
1049 capabilities are requested. */
1050 if (!flag_sel_sched_pipelining
)
1051 flag_sel_sched_pipelining_outer_loops
= 0;
1053 if (!targetm
.ira_cover_classes
1054 && flag_ira_algorithm
== IRA_ALGORITHM_CB
)
1056 inform (input_location
,
1057 "-fira-algorithm=CB does not work on this architecture");
1058 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1061 /* Save the current optimization options if this is the first call. */
1064 optimization_default_node
= build_optimization_node ();
1065 optimization_current_node
= optimization_default_node
;
1066 first_time_p
= false;
1068 if (flag_conserve_stack
)
1070 if (!PARAM_SET_P (PARAM_LARGE_STACK_FRAME
))
1071 PARAM_VALUE (PARAM_LARGE_STACK_FRAME
) = 100;
1072 if (!PARAM_SET_P (PARAM_STACK_FRAME_GROWTH
))
1073 PARAM_VALUE (PARAM_STACK_FRAME_GROWTH
) = 40;
1078 #define LEFT_COLUMN 27
1080 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1081 followed by word-wrapped HELP in a second column. */
1083 wrap_help (const char *help
,
1085 unsigned int item_width
,
1086 unsigned int columns
)
1088 unsigned int col_width
= LEFT_COLUMN
;
1089 unsigned int remaining
, room
, len
;
1091 remaining
= strlen (help
);
1095 room
= columns
- 3 - MAX (col_width
, item_width
);
1104 for (i
= 0; help
[i
]; i
++)
1106 if (i
>= room
&& len
!= remaining
)
1110 else if ((help
[i
] == '-' || help
[i
] == '/')
1111 && help
[i
+ 1] != ' '
1112 && i
> 0 && ISALPHA (help
[i
- 1]))
1117 printf( " %-*.*s %.*s\n", col_width
, item_width
, item
, len
, help
);
1119 while (help
[len
] == ' ')
1127 /* Print help for a specific front-end, etc. */
1129 print_filtered_help (unsigned int include_flags
,
1130 unsigned int exclude_flags
,
1131 unsigned int any_flags
,
1132 unsigned int columns
)
1136 static char *printed
= NULL
;
1138 bool displayed
= false;
1140 if (include_flags
== CL_PARAMS
)
1142 for (i
= 0; i
< LAST_PARAM
; i
++)
1144 const char *param
= compiler_params
[i
].option
;
1146 help
= compiler_params
[i
].help
;
1147 if (help
== NULL
|| *help
== '\0')
1149 if (exclude_flags
& CL_UNDOCUMENTED
)
1151 help
= undocumented_msg
;
1154 /* Get the translation. */
1157 wrap_help (help
, param
, strlen (param
), columns
);
1164 printed
= XCNEWVAR (char, cl_options_count
);
1166 for (i
= 0; i
< cl_options_count
; i
++)
1168 static char new_help
[128];
1169 const struct cl_option
*option
= cl_options
+ i
;
1174 if (include_flags
== 0
1175 || ((option
->flags
& include_flags
) != include_flags
))
1177 if ((option
->flags
& any_flags
) == 0)
1181 /* Skip unwanted switches. */
1182 if ((option
->flags
& exclude_flags
) != 0)
1186 /* Skip switches that have already been printed. */
1192 help
= option
->help
;
1195 if (exclude_flags
& CL_UNDOCUMENTED
)
1197 help
= undocumented_msg
;
1200 /* Get the translation. */
1203 /* Find the gap between the name of the
1204 option and its descriptive text. */
1205 tab
= strchr (help
, '\t');
1214 opt
= option
->opt_text
;
1218 /* With the -Q option enabled we change the descriptive text associated
1219 with an option to be an indication of its current setting. */
1222 if (len
< (LEFT_COLUMN
+ 2))
1223 strcpy (new_help
, "\t\t");
1225 strcpy (new_help
, "\t");
1227 if (option
->flag_var
!= NULL
)
1229 if (option
->flags
& CL_JOINED
)
1231 if (option
->var_type
== CLVC_STRING
)
1233 if (* (const char **) option
->flag_var
!= NULL
)
1234 snprintf (new_help
+ strlen (new_help
),
1235 sizeof (new_help
) - strlen (new_help
),
1236 * (const char **) option
->flag_var
);
1239 sprintf (new_help
+ strlen (new_help
),
1240 "%#x", * (int *) option
->flag_var
);
1243 strcat (new_help
, option_enabled (i
)
1244 ? _("[enabled]") : _("[disabled]"));
1250 wrap_help (help
, opt
, len
, columns
);
1256 unsigned int langs
= include_flags
& CL_LANG_ALL
;
1259 printf (_(" No options with the desired characteristics were found\n"));
1264 /* PR 31349: Tell the user how to see all of the
1265 options supported by a specific front end. */
1266 for (i
= 0; (1U << i
) < CL_LANG_ALL
; i
++)
1267 if ((1U << i
) & langs
)
1268 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1269 lang_names
[i
], lang_names
[i
]);
1273 else if (! displayed
)
1274 printf (_(" All options with the desired characteristics have already been displayed\n"));
1279 /* Display help for a specified type of option.
1280 The options must have ALL of the INCLUDE_FLAGS set
1281 ANY of the flags in the ANY_FLAGS set
1282 and NONE of the EXCLUDE_FLAGS set. */
1284 print_specific_help (unsigned int include_flags
,
1285 unsigned int exclude_flags
,
1286 unsigned int any_flags
)
1288 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1289 const char * description
= NULL
;
1290 const char * descrip_extra
= "";
1293 static unsigned int columns
= 0;
1295 /* Sanity check: Make sure that we do not have more
1296 languages than we have bits available to enumerate them. */
1297 gcc_assert ((1U << cl_lang_count
) < CL_MIN_OPTION_CLASS
);
1299 /* If we have not done so already, obtain
1300 the desired maximum width of the output. */
1305 GET_ENVIRONMENT (p
, "COLUMNS");
1308 int value
= atoi (p
);
1315 /* Use a reasonable default. */
1319 /* Decide upon the title for the options that we are going to display. */
1320 for (i
= 0, flag
= 1; flag
<= CL_MAX_OPTION_CLASS
; flag
<<= 1, i
++)
1322 switch (flag
& include_flags
)
1328 description
= _("The following options are target specific");
1331 description
= _("The following options control compiler warning messages");
1333 case CL_OPTIMIZATION
:
1334 description
= _("The following options control optimizations");
1337 description
= _("The following options are language-independent");
1340 description
= _("The --param option recognizes the following as parameters");
1343 if (i
>= cl_lang_count
)
1345 if (exclude_flags
& all_langs_mask
)
1346 description
= _("The following options are specific to just the language ");
1348 description
= _("The following options are supported by the language ");
1349 descrip_extra
= lang_names
[i
];
1354 if (description
== NULL
)
1358 if (include_flags
& CL_UNDOCUMENTED
)
1359 description
= _("The following options are not documented");
1360 else if (include_flags
& CL_SEPARATE
)
1361 description
= _("The following options take separate arguments");
1362 else if (include_flags
& CL_JOINED
)
1363 description
= _("The following options take joined arguments");
1366 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1373 if (any_flags
& all_langs_mask
)
1374 description
= _("The following options are language-related");
1376 description
= _("The following options are language-independent");
1380 printf ("%s%s:\n", description
, descrip_extra
);
1381 print_filtered_help (include_flags
, exclude_flags
, any_flags
, columns
);
1384 /* Handle target- and language-independent options. Return zero to
1385 generate an "unknown option" message. Only options that need
1386 extra handling need to be listed here; if you simply want
1387 VALUE assigned to a variable, it happens automatically. */
1390 common_handle_option (size_t scode
, const char *arg
, int value
,
1391 unsigned int lang_mask
)
1393 static bool verbose
= false;
1394 enum opt_code code
= (enum opt_code
) scode
;
1409 unsigned int all_langs_mask
= (1U << cl_lang_count
) - 1;
1410 unsigned int undoc_mask
;
1413 undoc_mask
= (verbose
| extra_warnings
) ? 0 : CL_UNDOCUMENTED
;
1414 /* First display any single language specific options. */
1415 for (i
= 0; i
< cl_lang_count
; i
++)
1417 (1U << i
, (all_langs_mask
& (~ (1U << i
))) | undoc_mask
, 0);
1418 /* Next display any multi language specific options. */
1419 print_specific_help (0, undoc_mask
, all_langs_mask
);
1420 /* Then display any remaining, non-language options. */
1421 for (i
= CL_MIN_OPTION_CLASS
; i
<= CL_MAX_OPTION_CLASS
; i
<<= 1)
1422 print_specific_help (i
, undoc_mask
, 0);
1423 exit_after_options
= true;
1427 case OPT_ftarget_help
:
1428 case OPT__target_help
:
1429 print_specific_help (CL_TARGET
, CL_UNDOCUMENTED
, 0);
1430 exit_after_options
= true;
1432 /* Allow the target a chance to give the user some additional information. */
1433 if (targetm
.target_help
)
1434 targetm
.target_help ();
1440 const char * a
= arg
;
1441 unsigned int include_flags
= 0;
1442 /* Note - by default we include undocumented options when listing
1443 specific classes. If you only want to see documented options
1444 then add ",^undocumented" to the --help= option. E.g.:
1446 --help=target,^undocumented */
1447 unsigned int exclude_flags
= 0;
1449 /* Walk along the argument string, parsing each word in turn.
1451 arg = [^]{word}[,{arg}]
1452 word = {optimizers|target|warnings|undocumented|
1453 params|common|<language>} */
1458 const char * string
;
1463 { "optimizers", CL_OPTIMIZATION
},
1464 { "target", CL_TARGET
},
1465 { "warnings", CL_WARNING
},
1466 { "undocumented", CL_UNDOCUMENTED
},
1467 { "params", CL_PARAMS
},
1468 { "joined", CL_JOINED
},
1469 { "separate", CL_SEPARATE
},
1470 { "common", CL_COMMON
},
1473 unsigned int * pflags
;
1475 unsigned int lang_flag
, specific_flag
;
1482 pflags
= & exclude_flags
;
1485 pflags
= & include_flags
;
1487 comma
= strchr (a
, ',');
1498 /* Check to see if the string matches an option class name. */
1499 for (i
= 0, specific_flag
= 0; specifics
[i
].string
!= NULL
; i
++)
1500 if (strncasecmp (a
, specifics
[i
].string
, len
) == 0)
1502 specific_flag
= specifics
[i
].flag
;
1506 /* Check to see if the string matches a language name.
1507 Note - we rely upon the alpha-sorted nature of the entries in
1508 the lang_names array, specifically that shorter names appear
1509 before their longer variants. (i.e. C before C++). That way
1510 when we are attempting to match --help=c for example we will
1511 match with C first and not C++. */
1512 for (i
= 0, lang_flag
= 0; i
< cl_lang_count
; i
++)
1513 if (strncasecmp (a
, lang_names
[i
], len
) == 0)
1515 lang_flag
= 1U << i
;
1519 if (specific_flag
!= 0)
1522 * pflags
|= specific_flag
;
1525 /* The option's argument matches both the start of a
1526 language name and the start of an option class name.
1527 We have a special case for when the user has
1528 specified "--help=c", but otherwise we have to issue
1530 if (strncasecmp (a
, "c", len
) == 0)
1531 * pflags
|= lang_flag
;
1534 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1538 else if (lang_flag
!= 0)
1539 * pflags
|= lang_flag
;
1542 "warning: unrecognized argument to --help= option: %.*s\n",
1551 print_specific_help (include_flags
, exclude_flags
, 0);
1552 exit_after_options
= true;
1558 exit_after_options
= true;
1562 g_switch_value
= value
;
1563 g_switch_set
= true;
1568 /* Currently handled in a prescan. */
1572 enable_warning_as_error (arg
, value
, lang_mask
);
1575 case OPT_Wlarger_than_
:
1576 /* This form corresponds to -Wlarger-than-.
1577 Kept for backward compatibility.
1578 Don't use it as the first argument of warning(). */
1580 case OPT_Wlarger_than_eq
:
1581 larger_than_size
= value
;
1582 warn_larger_than
= value
!= -1;
1585 case OPT_Wframe_larger_than_
:
1586 frame_larger_than_size
= value
;
1587 warn_frame_larger_than
= value
!= -1;
1590 case OPT_Wstrict_aliasing
:
1591 set_Wstrict_aliasing (value
);
1594 case OPT_Wstrict_aliasing_
:
1595 warn_strict_aliasing
= value
;
1598 case OPT_Wstrict_overflow
:
1599 warn_strict_overflow
= (value
1600 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1604 case OPT_Wstrict_overflow_
:
1605 warn_strict_overflow
= value
;
1609 warn_unused
= value
;
1614 aux_info_file_name
= arg
;
1615 flag_gen_aux_info
= 1;
1619 aux_base_name
= arg
;
1622 case OPT_auxbase_strip
:
1624 char *tmp
= xstrdup (arg
);
1625 strip_off_ending (tmp
, strlen (tmp
));
1627 aux_base_name
= tmp
;
1632 decode_d_option (arg
);
1636 dump_base_name
= arg
;
1639 case OPT_falign_functions_
:
1640 align_functions
= value
;
1643 case OPT_falign_jumps_
:
1644 align_jumps
= value
;
1647 case OPT_falign_labels_
:
1648 align_labels
= value
;
1651 case OPT_falign_loops_
:
1652 align_loops
= value
;
1655 case OPT_fbranch_probabilities
:
1656 flag_branch_probabilities_set
= true;
1659 case OPT_fcall_used_
:
1660 fix_register (arg
, 0, 1);
1663 case OPT_fcall_saved_
:
1664 fix_register (arg
, 0, 0);
1668 dbg_cnt_process_opt (arg
);
1671 case OPT_fdbg_cnt_list
:
1672 dbg_cnt_list_all_counters ();
1675 case OPT_fdebug_prefix_map_
:
1676 add_debug_prefix_map (arg
);
1679 case OPT_fdiagnostics_show_location_
:
1680 if (!strcmp (arg
, "once"))
1681 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
1682 else if (!strcmp (arg
, "every-line"))
1683 diagnostic_prefixing_rule (global_dc
)
1684 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
1689 case OPT_fdiagnostics_show_option
:
1690 global_dc
->show_option_requested
= true;
1694 if (!dump_switch_p (arg
))
1698 case OPT_fexcess_precision_
:
1699 if (!strcmp (arg
, "fast"))
1700 flag_excess_precision_cmdline
= EXCESS_PRECISION_FAST
;
1701 else if (!strcmp (arg
, "standard"))
1702 flag_excess_precision_cmdline
= EXCESS_PRECISION_STANDARD
;
1704 error ("unknown excess precision style \"%s\"", arg
);
1707 case OPT_ffast_math
:
1708 set_fast_math_flags (value
);
1711 case OPT_funsafe_math_optimizations
:
1712 set_unsafe_math_optimizations_flags (value
);
1716 fix_register (arg
, 1, 1);
1719 case OPT_finline_limit_
:
1720 case OPT_finline_limit_eq
:
1721 set_param_value ("max-inline-insns-single", value
/ 2);
1722 set_param_value ("max-inline-insns-auto", value
/ 2);
1725 case OPT_finstrument_functions_exclude_function_list_
:
1726 add_comma_separated_to_vector
1727 (&flag_instrument_functions_exclude_functions
, arg
);
1730 case OPT_finstrument_functions_exclude_file_list_
:
1731 add_comma_separated_to_vector
1732 (&flag_instrument_functions_exclude_files
, arg
);
1735 case OPT_fmessage_length_
:
1736 pp_set_line_maximum_length (global_dc
->printer
, value
);
1739 case OPT_fpack_struct_
:
1740 if (value
<= 0 || (value
& (value
- 1)) || value
> 16)
1741 error ("structure alignment must be a small power of two, not %d", value
);
1744 initial_max_fld_align
= value
;
1745 maximum_field_alignment
= value
* BITS_PER_UNIT
;
1749 case OPT_fpeel_loops
:
1750 flag_peel_loops_set
= true;
1754 #ifdef ENABLE_PLUGIN
1755 add_new_plugin (arg
);
1757 error ("Plugin support is disabled. Configure with --enable-plugin.");
1761 case OPT_fplugin_arg_
:
1762 #ifdef ENABLE_PLUGIN
1763 parse_plugin_arg_opt (arg
);
1765 error ("Plugin support is disabled. Configure with --enable-plugin.");
1769 case OPT_fprofile_arcs
:
1770 profile_arc_flag_set
= true;
1773 case OPT_finline_functions
:
1774 flag_inline_functions_set
= true;
1777 case OPT_fprofile_dir_
:
1778 profile_data_prefix
= xstrdup (arg
);
1781 case OPT_fprofile_use_
:
1782 profile_data_prefix
= xstrdup (arg
);
1783 flag_profile_use
= true;
1785 /* No break here - do -fprofile-use processing. */
1786 case OPT_fprofile_use
:
1787 if (!flag_branch_probabilities_set
)
1788 flag_branch_probabilities
= value
;
1789 if (!flag_profile_values_set
)
1790 flag_profile_values
= value
;
1791 if (!flag_unroll_loops_set
)
1792 flag_unroll_loops
= value
;
1793 if (!flag_peel_loops_set
)
1794 flag_peel_loops
= value
;
1795 if (!flag_tracer_set
)
1796 flag_tracer
= value
;
1797 if (!flag_value_profile_transformations_set
)
1798 flag_value_profile_transformations
= value
;
1799 if (!flag_inline_functions_set
)
1800 flag_inline_functions
= value
;
1801 if (!flag_ipa_cp_set
)
1802 flag_ipa_cp
= value
;
1803 if (!flag_ipa_cp_clone_set
1804 && value
&& flag_ipa_cp
)
1805 flag_ipa_cp_clone
= value
;
1806 if (!flag_predictive_commoning_set
)
1807 flag_predictive_commoning
= value
;
1808 if (!flag_unswitch_loops_set
)
1809 flag_unswitch_loops
= value
;
1810 if (!flag_gcse_after_reload_set
)
1811 flag_gcse_after_reload
= value
;
1814 case OPT_fprofile_generate_
:
1815 profile_data_prefix
= xstrdup (arg
);
1817 /* No break here - do -fprofile-generate processing. */
1818 case OPT_fprofile_generate
:
1819 if (!profile_arc_flag_set
)
1820 profile_arc_flag
= value
;
1821 if (!flag_profile_values_set
)
1822 flag_profile_values
= value
;
1823 if (!flag_value_profile_transformations_set
)
1824 flag_value_profile_transformations
= value
;
1825 if (!flag_inline_functions_set
)
1826 flag_inline_functions
= value
;
1829 case OPT_fprofile_values
:
1830 flag_profile_values_set
= true;
1833 case OPT_fvisibility_
:
1835 if (!strcmp(arg
, "default"))
1836 default_visibility
= VISIBILITY_DEFAULT
;
1837 else if (!strcmp(arg
, "internal"))
1838 default_visibility
= VISIBILITY_INTERNAL
;
1839 else if (!strcmp(arg
, "hidden"))
1840 default_visibility
= VISIBILITY_HIDDEN
;
1841 else if (!strcmp(arg
, "protected"))
1842 default_visibility
= VISIBILITY_PROTECTED
;
1844 error ("unrecognized visibility value \"%s\"", arg
);
1849 flag_value_profile_transformations_set
= true;
1852 case OPT_frandom_seed
:
1853 /* The real switch is -fno-random-seed. */
1856 set_random_seed (NULL
);
1859 case OPT_frandom_seed_
:
1860 set_random_seed (arg
);
1863 case OPT_fselective_scheduling
:
1864 case OPT_fselective_scheduling2
:
1865 sel_sched_switch_set
= true;
1868 case OPT_fsched_verbose_
:
1869 #ifdef INSN_SCHEDULING
1870 fix_sched_param ("verbose", arg
);
1876 case OPT_fsched_stalled_insns_
:
1877 flag_sched_stalled_insns
= value
;
1878 if (flag_sched_stalled_insns
== 0)
1879 flag_sched_stalled_insns
= -1;
1882 case OPT_fsched_stalled_insns_dep_
:
1883 flag_sched_stalled_insns_dep
= value
;
1886 case OPT_fstack_check_
:
1887 if (!strcmp (arg
, "no"))
1888 flag_stack_check
= NO_STACK_CHECK
;
1889 else if (!strcmp (arg
, "generic"))
1890 /* This is the old stack checking method. */
1891 flag_stack_check
= STACK_CHECK_BUILTIN
1892 ? FULL_BUILTIN_STACK_CHECK
1893 : GENERIC_STACK_CHECK
;
1894 else if (!strcmp (arg
, "specific"))
1895 /* This is the new stack checking method. */
1896 flag_stack_check
= STACK_CHECK_BUILTIN
1897 ? FULL_BUILTIN_STACK_CHECK
1898 : STACK_CHECK_STATIC_BUILTIN
1899 ? STATIC_BUILTIN_STACK_CHECK
1900 : GENERIC_STACK_CHECK
;
1902 warning (0, "unknown stack check parameter \"%s\"", arg
);
1905 case OPT_fstack_check
:
1906 /* This is the same as the "specific" mode above. */
1908 flag_stack_check
= STACK_CHECK_BUILTIN
1909 ? FULL_BUILTIN_STACK_CHECK
1910 : STACK_CHECK_STATIC_BUILTIN
1911 ? STATIC_BUILTIN_STACK_CHECK
1912 : GENERIC_STACK_CHECK
;
1914 flag_stack_check
= NO_STACK_CHECK
;
1917 case OPT_fstack_limit
:
1918 /* The real switch is -fno-stack-limit. */
1921 stack_limit_rtx
= NULL_RTX
;
1924 case OPT_fstack_limit_register_
:
1926 int reg
= decode_reg_name (arg
);
1928 error ("unrecognized register name \"%s\"", arg
);
1930 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
1934 case OPT_fstack_limit_symbol_
:
1935 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, ggc_strdup (arg
));
1938 case OPT_ftree_vectorizer_verbose_
:
1939 vect_set_verbosity_level (arg
);
1942 case OPT_ftls_model_
:
1943 if (!strcmp (arg
, "global-dynamic"))
1944 flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
1945 else if (!strcmp (arg
, "local-dynamic"))
1946 flag_tls_default
= TLS_MODEL_LOCAL_DYNAMIC
;
1947 else if (!strcmp (arg
, "initial-exec"))
1948 flag_tls_default
= TLS_MODEL_INITIAL_EXEC
;
1949 else if (!strcmp (arg
, "local-exec"))
1950 flag_tls_default
= TLS_MODEL_LOCAL_EXEC
;
1952 warning (0, "unknown tls-model \"%s\"", arg
);
1955 case OPT_fira_algorithm_
:
1956 if (!strcmp (arg
, "CB"))
1957 flag_ira_algorithm
= IRA_ALGORITHM_CB
;
1958 else if (!strcmp (arg
, "priority"))
1959 flag_ira_algorithm
= IRA_ALGORITHM_PRIORITY
;
1961 warning (0, "unknown ira algorithm \"%s\"", arg
);
1964 case OPT_fira_region_
:
1965 if (!strcmp (arg
, "one"))
1966 flag_ira_region
= IRA_REGION_ONE
;
1967 else if (!strcmp (arg
, "all"))
1968 flag_ira_region
= IRA_REGION_ALL
;
1969 else if (!strcmp (arg
, "mixed"))
1970 flag_ira_region
= IRA_REGION_MIXED
;
1972 warning (0, "unknown ira region \"%s\"", arg
);
1975 case OPT_fira_verbose_
:
1976 flag_ira_verbose
= value
;
1980 flag_tracer_set
= true;
1984 flag_ipa_cp_set
= true;
1987 case OPT_fipa_cp_clone
:
1988 flag_ipa_cp_clone_set
= true;
1991 case OPT_fpredictive_commoning
:
1992 flag_predictive_commoning_set
= true;
1995 case OPT_funswitch_loops
:
1996 flag_unswitch_loops_set
= true;
1999 case OPT_fgcse_after_reload
:
2000 flag_gcse_after_reload_set
= true;
2003 case OPT_funroll_loops
:
2004 flag_unroll_loops_set
= true;
2008 set_debug_level (NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
, arg
);
2012 set_debug_level (SDB_DEBUG
, false, arg
);
2016 set_debug_level (DWARF2_DEBUG
, false, arg
);
2020 set_debug_level (NO_DEBUG
, 2, arg
);
2025 set_debug_level (DBX_DEBUG
, code
== OPT_gstabs_
, arg
);
2029 set_debug_level (VMS_DEBUG
, false, arg
);
2034 set_debug_level (XCOFF_DEBUG
, code
== OPT_gxcoff_
, arg
);
2038 asm_file_name
= arg
;
2041 case OPT_pedantic_errors
:
2042 flag_pedantic_errors
= pedantic
= 1;
2045 case OPT_floop_optimize
:
2046 case OPT_frerun_loop_opt
:
2047 case OPT_fstrength_reduce
:
2048 case OPT_ftree_store_copy_prop
:
2049 case OPT_fforce_addr
:
2050 case OPT_ftree_salias
:
2051 case OPT_ftree_store_ccp
:
2052 /* These are no-ops, preserved for backward compatibility. */
2056 /* If the flag was handled in a standard way, assume the lack of
2057 processing here is intentional. */
2058 gcc_assert (cl_options
[scode
].flag_var
);
2065 /* Handle --param NAME=VALUE. */
2067 handle_param (const char *carg
)
2072 arg
= xstrdup (carg
);
2073 equal
= strchr (arg
, '=');
2075 error ("%s: --param arguments should be of the form NAME=VALUE", arg
);
2078 value
= integral_argument (equal
+ 1);
2080 error ("invalid --param value %qs", equal
+ 1);
2084 set_param_value (arg
, value
);
2091 /* Used to set the level of strict aliasing warnings,
2092 when no level is specified (i.e., when -Wstrict-aliasing, and not
2093 -Wstrict-aliasing=level was given).
2094 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
2095 and 0 otherwise. After calling this function, wstrict_aliasing will be
2096 set to the default value of -Wstrict_aliasing=level, currently 3. */
2098 set_Wstrict_aliasing (int onoff
)
2100 gcc_assert (onoff
== 0 || onoff
== 1);
2102 warn_strict_aliasing
= 3;
2104 warn_strict_aliasing
= 0;
2107 /* The following routines are useful in setting all the flags that
2108 -ffast-math and -fno-fast-math imply. */
2110 set_fast_math_flags (int set
)
2112 flag_unsafe_math_optimizations
= set
;
2113 set_unsafe_math_optimizations_flags (set
);
2114 flag_finite_math_only
= set
;
2115 flag_errno_math
= !set
;
2118 flag_signaling_nans
= 0;
2119 flag_rounding_math
= 0;
2120 flag_cx_limited_range
= 1;
2124 /* When -funsafe-math-optimizations is set the following
2125 flags are set as well. */
2127 set_unsafe_math_optimizations_flags (int set
)
2129 flag_trapping_math
= !set
;
2130 flag_signed_zeros
= !set
;
2131 flag_associative_math
= set
;
2132 flag_reciprocal_math
= set
;
2135 /* Return true iff flags are set as if -ffast-math. */
2137 fast_math_flags_set_p (void)
2139 return (!flag_trapping_math
2140 && flag_unsafe_math_optimizations
2141 && flag_finite_math_only
2142 && !flag_signed_zeros
2143 && !flag_errno_math
);
2146 /* Return true iff flags are set as if -ffast-math but using the flags stored
2147 in the struct cl_optimization structure. */
2149 fast_math_flags_struct_set_p (struct cl_optimization
*opt
)
2151 return (!opt
->flag_trapping_math
2152 && opt
->flag_unsafe_math_optimizations
2153 && opt
->flag_finite_math_only
2154 && !opt
->flag_signed_zeros
2155 && !opt
->flag_errno_math
);
2158 /* Handle a debug output -g switch. EXTENDED is true or false to support
2159 extended output (2 is special and means "-ggdb" was given). */
2161 set_debug_level (enum debug_info_type type
, int extended
, const char *arg
)
2163 static bool type_explicit
;
2165 use_gnu_debug_info_extensions
= extended
;
2167 if (type
== NO_DEBUG
)
2169 if (write_symbols
== NO_DEBUG
)
2171 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2175 #ifdef DWARF2_DEBUGGING_INFO
2176 write_symbols
= DWARF2_DEBUG
;
2177 #elif defined DBX_DEBUGGING_INFO
2178 write_symbols
= DBX_DEBUG
;
2182 if (write_symbols
== NO_DEBUG
)
2183 warning (0, "target system does not support debug output");
2188 /* Does it conflict with an already selected type? */
2189 if (type_explicit
&& write_symbols
!= NO_DEBUG
&& type
!= write_symbols
)
2190 error ("debug format \"%s\" conflicts with prior selection",
2191 debug_type_names
[type
]);
2192 write_symbols
= type
;
2193 type_explicit
= true;
2196 /* A debug flag without a level defaults to level 2. */
2199 if (!debug_info_level
)
2200 debug_info_level
= DINFO_LEVEL_NORMAL
;
2204 int argval
= integral_argument (arg
);
2206 error ("unrecognised debug output level \"%s\"", arg
);
2207 else if (argval
> 3)
2208 error ("debug output level %s is too high", arg
);
2210 debug_info_level
= (enum debug_info_level
) argval
;
2214 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2215 a simple on-off switch. */
2218 option_enabled (int opt_idx
)
2220 const struct cl_option
*option
= &(cl_options
[opt_idx
]);
2222 if (option
->flag_var
)
2223 switch (option
->var_type
)
2226 return *(int *) option
->flag_var
!= 0;
2229 return *(int *) option
->flag_var
== option
->var_value
;
2231 case CLVC_BIT_CLEAR
:
2232 return (*(int *) option
->flag_var
& option
->var_value
) == 0;
2235 return (*(int *) option
->flag_var
& option
->var_value
) != 0;
2243 /* Fill STATE with the current state of option OPTION. Return true if
2244 there is some state to store. */
2247 get_option_state (int option
, struct cl_option_state
*state
)
2249 if (cl_options
[option
].flag_var
== 0)
2252 switch (cl_options
[option
].var_type
)
2256 state
->data
= cl_options
[option
].flag_var
;
2257 state
->size
= sizeof (int);
2260 case CLVC_BIT_CLEAR
:
2262 state
->ch
= option_enabled (option
);
2263 state
->data
= &state
->ch
;
2268 state
->data
= *(const char **) cl_options
[option
].flag_var
;
2269 if (state
->data
== 0)
2271 state
->size
= strlen ((const char *) state
->data
) + 1;
2277 /* Enable a warning option as an error. This is used by -Werror= and
2278 also by legacy Werror-implicit-function-declaration. */
2281 enable_warning_as_error (const char *arg
, int value
, unsigned int lang_mask
)
2286 new_option
= XNEWVEC (char, strlen (arg
) + 2);
2287 new_option
[0] = 'W';
2288 strcpy (new_option
+ 1, arg
);
2289 option_index
= find_opt (new_option
, lang_mask
);
2290 if (option_index
== N_OPTS
)
2292 error ("-Werror=%s: No option -%s", arg
, new_option
);
2296 diagnostic_t kind
= value
? DK_ERROR
: DK_WARNING
;
2297 diagnostic_classify_diagnostic (global_dc
, option_index
, kind
);
2299 /* -Werror=foo implies -Wfoo. */
2300 if (cl_options
[option_index
].var_type
== CLVC_BOOLEAN
2301 && cl_options
[option_index
].flag_var
2302 && kind
== DK_ERROR
)
2303 *(int *) cl_options
[option_index
].flag_var
= 1;