1 //===- AddressSpaces.h - Language-specific address spaces -------*- 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 /// \file
10 /// Provides definitions for the various language-specific address
11 /// spaces.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #ifndef LLVM_CLANG_BASIC_ADDRESSSPACES_H
16 #define LLVM_CLANG_BASIC_ADDRESSSPACES_H
17
18 #include <cassert>
19
20 namespace clang {
21
22 /// Defines the address space values used by the address space qualifier
23 /// of QualType.
24 ///
25 enum class LangAS : unsigned {
26 // The default value 0 is the value used in QualType for the situation
27 // where there is no address space qualifier.
28 Default = 0,
29
30 // OpenCL specific address spaces.
31 // In OpenCL each l-value must have certain non-default address space, each
32 // r-value must have no address space (i.e. the default address space). The
33 // pointee of a pointer must have non-default address space.
34 opencl_global,
35 opencl_local,
36 opencl_constant,
37 opencl_private,
38 opencl_generic,
39 opencl_global_device,
40 opencl_global_host,
41
42 // CUDA specific address spaces.
43 cuda_device,
44 cuda_constant,
45 cuda_shared,
46
47 // SYCL specific address spaces.
48 sycl_global,
49 sycl_global_device,
50 sycl_global_host,
51 sycl_local,
52 sycl_private,
53
54 // Pointer size and extension address spaces.
55 ptr32_sptr,
56 ptr32_uptr,
57 ptr64,
58
59 // This denotes the count of language-specific address spaces and also
60 // the offset added to the target-specific address spaces, which are usually
61 // specified by address space attributes __attribute__(address_space(n))).
62 FirstTargetAddressSpace
63 };
64
65 /// The type of a lookup table which maps from language-specific address spaces
66 /// to target-specific ones.
67 using LangASMap = unsigned[(unsigned)LangAS::FirstTargetAddressSpace];
68
69 /// \return whether \p AS is a target-specific address space rather than a
70 /// clang AST address space
isTargetAddressSpace(LangAS AS)71 inline bool isTargetAddressSpace(LangAS AS) {
72 return (unsigned)AS >= (unsigned)LangAS::FirstTargetAddressSpace;
73 }
74
toTargetAddressSpace(LangAS AS)75 inline unsigned toTargetAddressSpace(LangAS AS) {
76 assert(isTargetAddressSpace(AS));
77 return (unsigned)AS - (unsigned)LangAS::FirstTargetAddressSpace;
78 }
79
getLangASFromTargetAS(unsigned TargetAS)80 inline LangAS getLangASFromTargetAS(unsigned TargetAS) {
81 return static_cast<LangAS>((TargetAS) +
82 (unsigned)LangAS::FirstTargetAddressSpace);
83 }
84
isPtrSizeAddressSpace(LangAS AS)85 inline bool isPtrSizeAddressSpace(LangAS AS) {
86 return (AS == LangAS::ptr32_sptr || AS == LangAS::ptr32_uptr ||
87 AS == LangAS::ptr64);
88 }
89
90 } // namespace clang
91
92 #endif // LLVM_CLANG_BASIC_ADDRESSSPACES_H
93