DemangleConfig.h revision 360784
1//===--- DemangleConfig.h ---------------------------------------*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file contains a variety of feature test macros copied from 10// include/llvm/Support/Compiler.h so that LLVMDemangle does not need to take 11// a dependency on LLVMSupport. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_DEMANGLE_COMPILER_H 16#define LLVM_DEMANGLE_COMPILER_H 17 18#ifndef __has_feature 19#define __has_feature(x) 0 20#endif 21 22#ifndef __has_cpp_attribute 23#define __has_cpp_attribute(x) 0 24#endif 25 26#ifndef __has_attribute 27#define __has_attribute(x) 0 28#endif 29 30#ifndef __has_builtin 31#define __has_builtin(x) 0 32#endif 33 34#ifndef DEMANGLE_GNUC_PREREQ 35#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) 36#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ 37 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \ 38 ((maj) << 20) + ((min) << 10) + (patch)) 39#elif defined(__GNUC__) && defined(__GNUC_MINOR__) 40#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ 41 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10)) 42#else 43#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0 44#endif 45#endif 46 47#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0) 48#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__)) 49#else 50#define DEMANGLE_ATTRIBUTE_USED 51#endif 52 53#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0) 54#define DEMANGLE_UNREACHABLE __builtin_unreachable() 55#elif defined(_MSC_VER) 56#define DEMANGLE_UNREACHABLE __assume(false) 57#else 58#define DEMANGLE_UNREACHABLE 59#endif 60 61#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0) 62#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline)) 63#elif defined(_MSC_VER) 64#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline) 65#else 66#define DEMANGLE_ATTRIBUTE_NOINLINE 67#endif 68 69#if !defined(NDEBUG) 70#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED 71#else 72#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE 73#endif 74 75#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 76#define DEMANGLE_FALLTHROUGH [[fallthrough]] 77#elif __has_cpp_attribute(gnu::fallthrough) 78#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]] 79#elif !__cplusplus 80// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious 81// error when __has_cpp_attribute is given a scoped attribute in C mode. 82#define DEMANGLE_FALLTHROUGH 83#elif __has_cpp_attribute(clang::fallthrough) 84#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]] 85#else 86#define DEMANGLE_FALLTHROUGH 87#endif 88 89#define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle { 90#define DEMANGLE_NAMESPACE_END } } 91 92#endif 93