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 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify it under 9the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 3, or (at your option) any later 11version. 12 13GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14WARRANTY; without even the implied warranty of MERCHANTABILITY or 15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16for more details. 17 18You should have received a copy of the GNU General Public License 19along 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. */ 32extern const char *const debug_type_names[]; 33 34extern void strip_off_ending (char *, int); 35extern 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 42extern bool in_lto_p; 43 44/* Return true iff flags are set as if -ffast-math. */ 45extern bool fast_math_flags_set_p (const struct gcc_options *); 46extern 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 55extern void set_Wstrict_aliasing (struct gcc_options *opts, int onoff); 56 57/* Now the symbols that are set with `-f' switches. */ 58 59/* True if printing into -fdump-final-insns= dump. */ 60 61extern bool final_insns_dump_p; 62 63/* Nonzero means make permerror produce warnings instead of errors. */ 64 65extern int flag_permissive; 66 67/* Generate code for GNU or NeXT Objective-C runtime environment. */ 68 69extern int flag_next_runtime; 70 71/* Other basic status info about current function. */ 72 73/* Target-dependent global state. */ 74struct target_flag_state { 75 /* Values of the -falign-* flags: how much to align labels in code. 76 0 means `use default', 1 means `don't align'. 77 For each variable, there is an _log variant which is the power 78 of two not less than the variable, for .align output. */ 79 int x_align_loops_log; 80 int x_align_loops_max_skip; 81 int x_align_jumps_log; 82 int x_align_jumps_max_skip; 83 int x_align_labels_log; 84 int x_align_labels_max_skip; 85 int x_align_functions_log; 86 87 /* The excess precision currently in effect. */ 88 enum excess_precision x_flag_excess_precision; 89}; 90 91extern struct target_flag_state default_target_flag_state; 92#if SWITCHABLE_TARGET 93extern struct target_flag_state *this_target_flag_state; 94#else 95#define this_target_flag_state (&default_target_flag_state) 96#endif 97 98#define align_loops_log \ 99 (this_target_flag_state->x_align_loops_log) 100#define align_loops_max_skip \ 101 (this_target_flag_state->x_align_loops_max_skip) 102#define align_jumps_log \ 103 (this_target_flag_state->x_align_jumps_log) 104#define align_jumps_max_skip \ 105 (this_target_flag_state->x_align_jumps_max_skip) 106#define align_labels_log \ 107 (this_target_flag_state->x_align_labels_log) 108#define align_labels_max_skip \ 109 (this_target_flag_state->x_align_labels_max_skip) 110#define align_functions_log \ 111 (this_target_flag_state->x_align_functions_log) 112#define flag_excess_precision \ 113 (this_target_flag_state->x_flag_excess_precision) 114 115/* Nonzero if we dump in VCG format, not plain text. */ 116extern int dump_for_graph; 117 118/* Returns TRUE if generated code should match ABI version N or 119 greater is in use. */ 120 121#define abi_version_at_least(N) \ 122 (flag_abi_version == 0 || flag_abi_version >= (N)) 123 124/* True if overflow wraps around for the given integral type. That 125 is, TYPE_MAX + 1 == TYPE_MIN. */ 126#define TYPE_OVERFLOW_WRAPS(TYPE) \ 127 (TYPE_UNSIGNED (TYPE) || flag_wrapv) 128 129/* True if overflow is undefined for the given integral type. We may 130 optimize on the assumption that values in the type never overflow. 131 132 IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED 133 must issue a warning based on warn_strict_overflow. In some cases 134 it will be appropriate to issue the warning immediately, and in 135 other cases it will be appropriate to simply set a flag and let the 136 caller decide whether a warning is appropriate or not. */ 137#define TYPE_OVERFLOW_UNDEFINED(TYPE) \ 138 (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow) 139 140/* True if overflow for the given integral type should issue a 141 trap. */ 142#define TYPE_OVERFLOW_TRAPS(TYPE) \ 143 (!TYPE_UNSIGNED (TYPE) && flag_trapv) 144 145/* True if pointer types have undefined overflow. */ 146#define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow) 147 148/* Whether to emit an overflow warning whose code is C. */ 149#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c)) 150 151#endif 152 153#endif /* ! GCC_FLAGS_H */ 154