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_DEMANGLECONFIG_H 16 #define LLVM_DEMANGLE_DEMANGLECONFIG_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 #ifndef DEMANGLE_ASSERT 90 #include <cassert> 91 #define DEMANGLE_ASSERT(__expr, __msg) assert((__expr) && (__msg)) 92 #endif 93 94 #define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle { 95 #define DEMANGLE_NAMESPACE_END } } 96 97 #endif 98