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 int base_of_path (const char *path
, const char **base_out
);
41 extern void set_struct_debug_option (struct gcc_options
*opts
,
44 /* Nonzero means use GNU-only extensions in the generated symbolic
45 debugging information. */
46 extern bool use_gnu_debug_info_extensions
;
48 /* Run the second compilation of -fcompare-debug. Not defined using
49 Var in common.opt because this is used in Ada code and so must be
50 an actual variable not a macro. */
51 extern int flag_compare_debug
;
53 /* Global visibility options. */
54 extern struct visibility_flags visibility_options
;
56 /* True if this is the LTO front end (lto1). This is used to disable
57 gimple generation and lowering passes that are normally run on the
58 output of a front end. These passes must be bypassed for lto since
59 they have already been done before the gimple was written. */
63 /* Used to set the level of -Wstrict-aliasing in OPTS, when no level
64 is specified. The external way to set the default level is to use
65 -Wstrict-aliasing=level.
66 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
67 and 0 otherwise. After calling this function, wstrict_aliasing will be
68 set to the default value of -Wstrict_aliasing=level. */
70 extern void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
72 /* Nonzero for -dp: annotate the assembly with a comment describing the
73 pattern and alternative used. */
75 extern int flag_print_asm_name
;
77 /* Now the symbols that are set with `-f' switches. */
79 /* Nonzero if we are only using compiler to check syntax errors. */
81 extern int rtl_dump_and_exit
;
83 /* True if printing into -fdump-final-insns= dump. */
85 extern bool final_insns_dump_p
;
87 /* Nonzero means make permerror produce warnings instead of errors. */
89 extern int flag_permissive
;
91 /* -dA causes debug information to be produced in
92 the generated assembly code (to make it more readable). This option
93 is generally only of use to those who actually need to read the
94 generated assembly code (perhaps while debugging the compiler itself).
95 Currently, this switch is only used by dwarfout.c; however, it is intended
96 to be a catchall for printing debug information in the assembler file. */
98 extern int flag_debug_asm
;
100 /* Generate code for GNU or NeXT Objective-C runtime environment. */
102 extern int flag_next_runtime
;
104 extern int flag_dump_rtl_in_asm
;
106 /* Other basic status info about current function. */
108 /* Target-dependent global state. */
109 struct target_flag_state
{
110 /* Values of the -falign-* flags: how much to align labels in code.
111 0 means `use default', 1 means `don't align'.
112 For each variable, there is an _log variant which is the power
113 of two not less than the variable, for .align output. */
114 int x_align_loops_log
;
115 int x_align_loops_max_skip
;
116 int x_align_jumps_log
;
117 int x_align_jumps_max_skip
;
118 int x_align_labels_log
;
119 int x_align_labels_max_skip
;
120 int x_align_functions_log
;
122 /* The excess precision currently in effect. */
123 enum excess_precision x_flag_excess_precision
;
126 extern struct target_flag_state default_target_flag_state
;
127 #if SWITCHABLE_TARGET
128 extern struct target_flag_state
*this_target_flag_state
;
130 #define this_target_flag_state (&default_target_flag_state)
133 #define align_loops_log \
134 (this_target_flag_state->x_align_loops_log)
135 #define align_loops_max_skip \
136 (this_target_flag_state->x_align_loops_max_skip)
137 #define align_jumps_log \
138 (this_target_flag_state->x_align_jumps_log)
139 #define align_jumps_max_skip \
140 (this_target_flag_state->x_align_jumps_max_skip)
141 #define align_labels_log \
142 (this_target_flag_state->x_align_labels_log)
143 #define align_labels_max_skip \
144 (this_target_flag_state->x_align_labels_max_skip)
145 #define align_functions_log \
146 (this_target_flag_state->x_align_functions_log)
147 #define flag_excess_precision \
148 (this_target_flag_state->x_flag_excess_precision)
150 /* Nonzero if we dump in VCG format, not plain text. */
151 extern int dump_for_graph
;
153 extern enum graph_dump_types graph_dump_format
;
155 extern enum stack_check_type flag_stack_check
;
157 /* Returns TRUE if generated code should match ABI version N or
158 greater is in use. */
160 #define abi_version_at_least(N) \
161 (flag_abi_version == 0 || flag_abi_version >= (N))
163 /* True if overflow wraps around for the given integral type. That
164 is, TYPE_MAX + 1 == TYPE_MIN. */
165 #define TYPE_OVERFLOW_WRAPS(TYPE) \
166 (TYPE_UNSIGNED (TYPE) || flag_wrapv)
168 /* True if overflow is undefined for the given integral type. We may
169 optimize on the assumption that values in the type never overflow.
171 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED
172 must issue a warning based on warn_strict_overflow. In some cases
173 it will be appropriate to issue the warning immediately, and in
174 other cases it will be appropriate to simply set a flag and let the
175 caller decide whether a warning is appropriate or not. */
176 #define TYPE_OVERFLOW_UNDEFINED(TYPE) \
177 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow)
179 /* True if overflow for the given integral type should issue a
181 #define TYPE_OVERFLOW_TRAPS(TYPE) \
182 (!TYPE_UNSIGNED (TYPE) && flag_trapv)
184 /* True if pointer types have undefined overflow. */
185 #define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow)
187 /* Whether to emit an overflow warning whose code is C. */
188 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
192 #endif /* ! GCC_FLAGS_H */