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, 2011
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 "flag-types.h"
28 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)
30 /* Names of debug_info_type, for error messages. */
31 extern const char *const debug_type_names
[];
33 extern void strip_off_ending (char *, int);
34 extern int base_of_path (const char *path
, const char **base_out
);
36 /* Return true iff flags are set as if -ffast-math. */
37 extern bool fast_math_flags_set_p (const struct gcc_options
*);
38 extern bool fast_math_flags_struct_set_p (struct cl_optimization
*);
40 /* Used to set the level of -Wstrict-aliasing in OPTS, when no level
41 is specified. The external way to set the default level is to use
42 -Wstrict-aliasing=level.
43 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
44 and 0 otherwise. After calling this function, wstrict_aliasing will be
45 set to the default value of -Wstrict_aliasing=level. */
47 extern void set_Wstrict_aliasing (struct gcc_options
*opts
, int onoff
);
49 /* Now the symbols that are set with `-f' switches. */
51 /* True if printing into -fdump-final-insns= dump. */
53 extern bool final_insns_dump_p
;
56 /* Other basic status info about current function. */
58 /* Target-dependent global state. */
59 struct target_flag_state
{
60 /* Values of the -falign-* flags: how much to align labels in code.
61 0 means `use default', 1 means `don't align'.
62 For each variable, there is an _log variant which is the power
63 of two not less than the variable, for .align output. */
64 int x_align_loops_log
;
65 int x_align_loops_max_skip
;
66 int x_align_jumps_log
;
67 int x_align_jumps_max_skip
;
68 int x_align_labels_log
;
69 int x_align_labels_max_skip
;
70 int x_align_functions_log
;
72 /* The excess precision currently in effect. */
73 enum excess_precision x_flag_excess_precision
;
76 extern struct target_flag_state default_target_flag_state
;
78 extern struct target_flag_state
*this_target_flag_state
;
80 #define this_target_flag_state (&default_target_flag_state)
83 #define align_loops_log \
84 (this_target_flag_state->x_align_loops_log)
85 #define align_loops_max_skip \
86 (this_target_flag_state->x_align_loops_max_skip)
87 #define align_jumps_log \
88 (this_target_flag_state->x_align_jumps_log)
89 #define align_jumps_max_skip \
90 (this_target_flag_state->x_align_jumps_max_skip)
91 #define align_labels_log \
92 (this_target_flag_state->x_align_labels_log)
93 #define align_labels_max_skip \
94 (this_target_flag_state->x_align_labels_max_skip)
95 #define align_functions_log \
96 (this_target_flag_state->x_align_functions_log)
97 #define flag_excess_precision \
98 (this_target_flag_state->x_flag_excess_precision)
100 /* Nonzero if we dump in VCG format, not plain text. */
101 extern int dump_for_graph
;
103 /* Returns TRUE if generated code should match ABI version N or
104 greater is in use. */
106 #define abi_version_at_least(N) \
107 (flag_abi_version == 0 || flag_abi_version >= (N))
109 /* True if overflow wraps around for the given integral type. That
110 is, TYPE_MAX + 1 == TYPE_MIN. */
111 #define TYPE_OVERFLOW_WRAPS(TYPE) \
112 (TYPE_UNSIGNED (TYPE) || flag_wrapv)
114 /* True if overflow is undefined for the given integral type. We may
115 optimize on the assumption that values in the type never overflow.
117 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED
118 must issue a warning based on warn_strict_overflow. In some cases
119 it will be appropriate to issue the warning immediately, and in
120 other cases it will be appropriate to simply set a flag and let the
121 caller decide whether a warning is appropriate or not. */
122 #define TYPE_OVERFLOW_UNDEFINED(TYPE) \
123 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow)
125 /* True if overflow for the given integral type should issue a
127 #define TYPE_OVERFLOW_TRAPS(TYPE) \
128 (!TYPE_UNSIGNED (TYPE) && flag_trapv)
130 /* True if pointer types have undefined overflow. */
131 #define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow)
133 /* Whether to emit an overflow warning whose code is C. */
134 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
138 #endif /* ! GCC_FLAGS_H */