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. 5 6 This file is part of GCC. 7 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 11 version. 12 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 16 for more details. 17 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/>. */ 21 22 #ifndef GCC_FLAGS_H 23 #define GCC_FLAGS_H 24 25 #include "coretypes.h" 26 #include "flag-types.h" 27 #include "options.h" 28 29 #if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS) 30 31 /* Names of debug_info_type, for error messages. */ 32 extern const char *const debug_type_names[]; 33 34 extern void strip_off_ending (char *, int); 35 extern int base_of_path (const char *path, const char **base_out); 36 37 /* True if this is the LTO front end (lto1). This is used to disable 38 gimple generation and lowering passes that are normally run on the 39 output of a front end. These passes must be bypassed for lto since 40 they have already been done before the gimple was written. */ 41 42 extern bool in_lto_p; 43 44 /* Return true iff flags are set as if -ffast-math. */ 45 extern bool fast_math_flags_set_p (const struct gcc_options *); 46 extern bool fast_math_flags_struct_set_p (struct cl_optimization *); 47 48 /* Used to set the level of -Wstrict-aliasing in OPTS, when no level 49 is specified. The external way to set the default level is to use 50 -Wstrict-aliasing=level. 51 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified, 52 and 0 otherwise. After calling this function, wstrict_aliasing will be 53 set to the default value of -Wstrict_aliasing=level. */ 54 55 extern void set_Wstrict_aliasing (struct gcc_options *opts, int onoff); 56 57 /* Now the symbols that are set with `-f' switches. */ 59 60 /* True if printing into -fdump-final-insns= dump. */ 61 62 extern bool final_insns_dump_p; 63 64 /* Nonzero means make permerror produce warnings instead of errors. */ 65 66 extern int flag_permissive; 67 68 /* Generate code for GNU or NeXT Objective-C runtime environment. */ 69 70 extern int flag_next_runtime; 71 72 /* Other basic status info about current function. */ 74 75 /* Target-dependent global state. */ 76 struct target_flag_state { 77 /* Values of the -falign-* flags: how much to align labels in code. 78 0 means `use default', 1 means `don't align'. 79 For each variable, there is an _log variant which is the power 80 of two not less than the variable, for .align output. */ 81 int x_align_loops_log; 82 int x_align_loops_max_skip; 83 int x_align_jumps_log; 84 int x_align_jumps_max_skip; 85 int x_align_labels_log; 86 int x_align_labels_max_skip; 87 int x_align_functions_log; 88 89 /* The excess precision currently in effect. */ 90 enum excess_precision x_flag_excess_precision; 91 }; 92 93 extern struct target_flag_state default_target_flag_state; 94 #if SWITCHABLE_TARGET 95 extern struct target_flag_state *this_target_flag_state; 96 #else 97 #define this_target_flag_state (&default_target_flag_state) 98 #endif 99 100 #define align_loops_log \ 101 (this_target_flag_state->x_align_loops_log) 102 #define align_loops_max_skip \ 103 (this_target_flag_state->x_align_loops_max_skip) 104 #define align_jumps_log \ 105 (this_target_flag_state->x_align_jumps_log) 106 #define align_jumps_max_skip \ 107 (this_target_flag_state->x_align_jumps_max_skip) 108 #define align_labels_log \ 109 (this_target_flag_state->x_align_labels_log) 110 #define align_labels_max_skip \ 111 (this_target_flag_state->x_align_labels_max_skip) 112 #define align_functions_log \ 113 (this_target_flag_state->x_align_functions_log) 114 #define flag_excess_precision \ 115 (this_target_flag_state->x_flag_excess_precision) 116 117 /* Nonzero if we dump in VCG format, not plain text. */ 118 extern int dump_for_graph; 119 120 /* Returns TRUE if generated code should match ABI version N or 121 greater is in use. */ 122 123 #define abi_version_at_least(N) \ 124 (flag_abi_version == 0 || flag_abi_version >= (N)) 125 126 /* True if overflow wraps around for the given integral type. That 127 is, TYPE_MAX + 1 == TYPE_MIN. */ 128 #define TYPE_OVERFLOW_WRAPS(TYPE) \ 129 (TYPE_UNSIGNED (TYPE) || flag_wrapv) 130 131 /* True if overflow is undefined for the given integral type. We may 132 optimize on the assumption that values in the type never overflow. 133 134 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED 135 must issue a warning based on warn_strict_overflow. In some cases 136 it will be appropriate to issue the warning immediately, and in 137 other cases it will be appropriate to simply set a flag and let the 138 caller decide whether a warning is appropriate or not. */ 139 #define TYPE_OVERFLOW_UNDEFINED(TYPE) \ 140 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow) 141 142 /* True if overflow for the given integral type should issue a 143 trap. */ 144 #define TYPE_OVERFLOW_TRAPS(TYPE) \ 145 (!TYPE_UNSIGNED (TYPE) && flag_trapv) 146 147 /* True if pointer types have undefined overflow. */ 148 #define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow) 149 150 /* Whether to emit an overflow warning whose code is C. */ 151 #define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c)) 152 153 #endif 154 155 #endif /* ! GCC_FLAGS_H */ 156
