1 /* Compilation switch flag definitions for GCC.
2 Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
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"
26 #include "flag-types.h"
29 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)
31 /* Specify which kind of debugging info to generate. */
32 extern enum debug_info_type write_symbols
;
34 /* Names of debug_info_type, for error messages. */
35 extern const char *const debug_type_names
[];
37 /* Specify how much debugging info to generate. */
38 extern enum debug_info_level debug_info_level
;
40 extern bool should_emit_struct_debug (tree type_decl
, enum debug_info_usage
);
41 extern void set_struct_debug_option (const char *value
);
43 /* Nonzero means use GNU-only extensions in the generated symbolic
44 debugging information. */
45 extern bool use_gnu_debug_info_extensions
;
47 /* Run the second compilation of -fcompare-debug. Not defined using
48 Var in common.opt because this is used in Ada code and so must be
49 an actual variable not a macro. */
50 extern int flag_compare_debug
;
52 /* Global visibility options. */
53 extern struct visibility_flags visibility_options
;
55 /* True if this is the LTO front end (lto1). This is used to disable
56 gimple generation and lowering passes that are normally run on the
57 output of a front end. These passes must be bypassed for lto since
58 they have already been done before the gimple was written. */
62 /* Used to set the level of -Wstrict-aliasing in OPTS, when no level
63 is specified. The external way to set the default level is to use
64 -Wstrict-aliasing=level.
65 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
66 and 0 otherwise. After calling this function, wstrict_aliasing will be
67 set to the default value of -Wstrict_aliasing=level. */
69 extern void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
71 /* Nonzero for -dp: annotate the assembly with a comment describing the
72 pattern and alternative used. */
74 extern int flag_print_asm_name
;
76 /* Now the symbols that are set with `-f' switches. */
78 /* Nonzero if we are only using compiler to check syntax errors. */
80 extern int rtl_dump_and_exit
;
82 /* True if printing into -fdump-final-insns= dump. */
84 extern bool final_insns_dump_p
;
86 /* Nonzero means make permerror produce warnings instead of errors. */
88 extern int flag_permissive
;
90 /* -dA causes debug information to be produced in
91 the generated assembly code (to make it more readable). This option
92 is generally only of use to those who actually need to read the
93 generated assembly code (perhaps while debugging the compiler itself).
94 Currently, this switch is only used by dwarfout.c; however, it is intended
95 to be a catchall for printing debug information in the assembler file. */
97 extern int flag_debug_asm
;
99 /* Generate code for GNU or NeXT Objective-C runtime environment. */
101 extern int flag_next_runtime
;
103 extern int flag_dump_rtl_in_asm
;
105 /* Other basic status info about current function. */
107 /* Target-dependent global state. */
108 struct target_flag_state
{
109 /* Values of the -falign-* flags: how much to align labels in code.
110 0 means `use default', 1 means `don't align'.
111 For each variable, there is an _log variant which is the power
112 of two not less than the variable, for .align output. */
113 int x_align_loops_log
;
114 int x_align_loops_max_skip
;
115 int x_align_jumps_log
;
116 int x_align_jumps_max_skip
;
117 int x_align_labels_log
;
118 int x_align_labels_max_skip
;
119 int x_align_functions_log
;
121 /* The excess precision currently in effect. */
122 enum excess_precision x_flag_excess_precision
;
125 extern struct target_flag_state default_target_flag_state
;
126 #if SWITCHABLE_TARGET
127 extern struct target_flag_state
*this_target_flag_state
;
129 #define this_target_flag_state (&default_target_flag_state)
132 #define align_loops_log \
133 (this_target_flag_state->x_align_loops_log)
134 #define align_loops_max_skip \
135 (this_target_flag_state->x_align_loops_max_skip)
136 #define align_jumps_log \
137 (this_target_flag_state->x_align_jumps_log)
138 #define align_jumps_max_skip \
139 (this_target_flag_state->x_align_jumps_max_skip)
140 #define align_labels_log \
141 (this_target_flag_state->x_align_labels_log)
142 #define align_labels_max_skip \
143 (this_target_flag_state->x_align_labels_max_skip)
144 #define align_functions_log \
145 (this_target_flag_state->x_align_functions_log)
146 #define flag_excess_precision \
147 (this_target_flag_state->x_flag_excess_precision)
149 /* Nonzero if we dump in VCG format, not plain text. */
150 extern int dump_for_graph
;
152 extern enum graph_dump_types graph_dump_format
;
154 extern enum stack_check_type flag_stack_check
;
156 /* Returns TRUE if generated code should match ABI version N or
157 greater is in use. */
159 #define abi_version_at_least(N) \
160 (flag_abi_version == 0 || flag_abi_version >= (N))
162 /* True if overflow wraps around for the given integral type. That
163 is, TYPE_MAX + 1 == TYPE_MIN. */
164 #define TYPE_OVERFLOW_WRAPS(TYPE) \
165 (TYPE_UNSIGNED (TYPE) || flag_wrapv)
167 /* True if overflow is undefined for the given integral type. We may
168 optimize on the assumption that values in the type never overflow.
170 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED
171 must issue a warning based on warn_strict_overflow. In some cases
172 it will be appropriate to issue the warning immediately, and in
173 other cases it will be appropriate to simply set a flag and let the
174 caller decide whether a warning is appropriate or not. */
175 #define TYPE_OVERFLOW_UNDEFINED(TYPE) \
176 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow)
178 /* True if overflow for the given integral type should issue a
180 #define TYPE_OVERFLOW_TRAPS(TYPE) \
181 (!TYPE_UNSIGNED (TYPE) && flag_trapv)
183 /* True if pointer types have undefined overflow. */
184 #define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow)
186 /* Whether to emit an overflow warning whose code is C. */
187 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
191 #endif /* ! GCC_FLAGS_H */