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//===- AddressSpaces.h - Language-specific address spaces -------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
/// \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
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