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  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. #define DEMANGLE_NAMESPACE_BEGIN namespace llvm { namespace itanium_demangle {
  90. #define DEMANGLE_NAMESPACE_END } }
  91.  
  92. #endif
  93.