include/llvm/Demangle/DemangleConfig.h

   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 #ifdef _MSC_VER
  19 // snprintf is implemented in VS 2015
  20 #if _MSC_VER < 1900
  21 #define snprintf _snprintf_s
  22 #endif
  23 #endif
  24
  25 #ifndef __has_feature
  26 #define __has_feature(x) 0
  27 #endif
  28
  29 #ifndef __has_cpp_attribute
  30 #define __has_cpp_attribute(x) 0
  31 #endif
  32
  33 #ifndef __has_attribute
  34 #define __has_attribute(x) 0
  35 #endif
  36
  37 #ifndef __has_builtin
  38 #define __has_builtin(x) 0
  39 #endif
  40
  41 #ifndef DEMANGLE_GNUC_PREREQ
  42 #if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
  43 #define DEMANGLE_GNUC_PREREQ(maj, min, patch)                           \
  44   ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >=          \
  45    ((maj) << 20) + ((min) << 10) + (patch))
  46 #elif defined(__GNUC__) && defined(__GNUC_MINOR__)
  47 #define DEMANGLE_GNUC_PREREQ(maj, min, patch)                           \
  48   ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
  49 #else
  50 #define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0
  51 #endif
  52 #endif
  53
  54 #if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0)
  55 #define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__))
  56 #else
  57 #define DEMANGLE_ATTRIBUTE_USED
  58 #endif
  59
  60 #if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0)
  61 #define DEMANGLE_UNREACHABLE __builtin_unreachable()
  62 #elif defined(_MSC_VER)
  63 #define DEMANGLE_UNREACHABLE __assume(false)
  64 #else
  65 #define DEMANGLE_UNREACHABLE
  66 #endif
  67
  68 #if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0)
  69 #define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline))
  70 #elif defined(_MSC_VER)
  71 #define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
  72 #else
  73 #define DEMANGLE_ATTRIBUTE_NOINLINE
  74 #endif
  75
  76 #if !defined(NDEBUG)
  77 #define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED
  78 #else
  79 #define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE
  80 #endif
  81
  82 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
  83 #define DEMANGLE_FALLTHROUGH [[fallthrough]]
  84 #elif __has_cpp_attribute(gnu::fallthrough)
  85 #define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]]
  86 #elif !__cplusplus
  87 // Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
  88 // error when __has_cpp_attribute is given a scoped attribute in C mode.
  89 #define DEMANGLE_FALLTHROUGH
  90 #elif __has_cpp_attribute(clang::fallthrough)
  91 #define DEMANGLE_FALLTHROUGH [[clang::fallthrough]]
  92 #else
  93 #define DEMANGLE_FALLTHROUGH
  94 #endif
  95
  96 #define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle {
  97 #define DEMANGLE_NAMESPACE_END } }
  98
  99 #endif