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diff --git a/clang-r353983/include/clang/Basic/AddressSpaces.h b/clang-r353983/include/clang/Basic/AddressSpaces.h
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+//===- AddressSpaces.h - Language-specific address spaces -------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// Provides definitions for the various language-specific address
+/// spaces.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_ADDRESSSPACES_H
+#define LLVM_CLANG_BASIC_ADDRESSSPACES_H
+
+#include <cassert>
+
+namespace clang {
+
+/// Defines the address space values used by the address space qualifier
+/// of QualType.
+///
+enum class LangAS : unsigned {
+  // The default value 0 is the value used in QualType for the situation
+  // where there is no address space qualifier.
+  Default = 0,
+
+  // OpenCL specific address spaces.
+  // In OpenCL each l-value must have certain non-default address space, each
+  // r-value must have no address space (i.e. the default address space). The
+  // pointee of a pointer must have non-default address space.
+  opencl_global,
+  opencl_local,
+  opencl_constant,
+  opencl_private,
+  opencl_generic,
+
+  // CUDA specific address spaces.
+  cuda_device,
+  cuda_constant,
+  cuda_shared,
+
+  // This denotes the count of language-specific address spaces and also
+  // the offset added to the target-specific address spaces, which are usually
+  // specified by address space attributes __attribute__(address_space(n))).
+  FirstTargetAddressSpace
+};
+
+/// The type of a lookup table which maps from language-specific address spaces
+/// to target-specific ones.
+using LangASMap = unsigned[(unsigned)LangAS::FirstTargetAddressSpace];
+
+/// \return whether \p AS is a target-specific address space rather than a
+/// clang AST address space
+inline bool isTargetAddressSpace(LangAS AS) {
+  return (unsigned)AS >= (unsigned)LangAS::FirstTargetAddressSpace;
+}
+
+inline unsigned toTargetAddressSpace(LangAS AS) {
+  assert(isTargetAddressSpace(AS));
+  return (unsigned)AS - (unsigned)LangAS::FirstTargetAddressSpace;
+}
+
+inline LangAS getLangASFromTargetAS(unsigned TargetAS) {
+  return static_cast<LangAS>((TargetAS) +
+                             (unsigned)LangAS::FirstTargetAddressSpace);
+}
+
+} // namespace clang
+
+#endif // LLVM_CLANG_BASIC_ADDRESSSPACES_H