1 //===- AddressSpaces.h - Language-specific address spaces -------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 /// \file
11 /// Provides definitions for the various language-specific address
12 /// spaces.
13 //
14 //===----------------------------------------------------------------------===//
15
16 #ifndef LLVM_CLANG_BASIC_ADDRESSSPACES_H
17 #define LLVM_CLANG_BASIC_ADDRESSSPACES_H
18
19 #include <cassert>
20
21 namespace clang {
22
23 /// Defines the address space values used by the address space qualifier
24 /// of QualType.
25 ///
26 enum class LangAS : unsigned {
27 // The default value 0 is the value used in QualType for the situation
28 // where there is no address space qualifier.
29 Default = 0,
30
31 // OpenCL specific address spaces.
32 // In OpenCL each l-value must have certain non-default address space, each
33 // r-value must have no address space (i.e. the default address space). The
34 // pointee of a pointer must have non-default address space.
35 opencl_global,
36 opencl_local,
37 opencl_constant,
38 opencl_private,
39 opencl_generic,
40
41 // CUDA specific address spaces.
42 cuda_device,
43 cuda_constant,
44 cuda_shared,
45
46 // This denotes the count of language-specific address spaces and also
47 // the offset added to the target-specific address spaces, which are usually
48 // specified by address space attributes __attribute__(address_space(n))).
49 FirstTargetAddressSpace
50 };
51
52 /// The type of a lookup table which maps from language-specific address spaces
53 /// to target-specific ones.
54 using LangASMap = unsigned[(unsigned)LangAS::FirstTargetAddressSpace];
55
56 /// \return whether \p AS is a target-specific address space rather than a
57 /// clang AST address space
isTargetAddressSpace(LangAS AS)58 inline bool isTargetAddressSpace(LangAS AS) {
59 return (unsigned)AS >= (unsigned)LangAS::FirstTargetAddressSpace;
60 }
61
toTargetAddressSpace(LangAS AS)62 inline unsigned toTargetAddressSpace(LangAS AS) {
63 assert(isTargetAddressSpace(AS));
64 return (unsigned)AS - (unsigned)LangAS::FirstTargetAddressSpace;
65 }
66
getLangASFromTargetAS(unsigned TargetAS)67 inline LangAS getLangASFromTargetAS(unsigned TargetAS) {
68 return static_cast<LangAS>((TargetAS) +
69 (unsigned)LangAS::FirstTargetAddressSpace);
70 }
71
72 } // namespace clang
73
74 #endif // LLVM_CLANG_BASIC_ADDRESSSPACES_H
75