clang  10.0.0svn
AddressSpaces.h
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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.
39 
40  // CUDA specific address spaces.
44 
45  // This denotes the count of language-specific address spaces and also
46  // the offset added to the target-specific address spaces, which are usually
47  // specified by address space attributes __attribute__(address_space(n))).
49 };
50 
51 /// The type of a lookup table which maps from language-specific address spaces
52 /// to target-specific ones.
53 using LangASMap = unsigned[(unsigned)LangAS::FirstTargetAddressSpace];
54 
55 /// \return whether \p AS is a target-specific address space rather than a
56 /// clang AST address space
57 inline bool isTargetAddressSpace(LangAS AS) {
58  return (unsigned)AS >= (unsigned)LangAS::FirstTargetAddressSpace;
59 }
60 
61 inline unsigned toTargetAddressSpace(LangAS AS) {
62  assert(isTargetAddressSpace(AS));
63  return (unsigned)AS - (unsigned)LangAS::FirstTargetAddressSpace;
64 }
65 
66 inline LangAS getLangASFromTargetAS(unsigned TargetAS) {
67  return static_cast<LangAS>((TargetAS) +
69 }
70 
71 } // namespace clang
72 
73 #endif // LLVM_CLANG_BASIC_ADDRESSSPACES_H
LangAS getLangASFromTargetAS(unsigned TargetAS)
Definition: AddressSpaces.h:66
LangAS
Defines the address space values used by the address space qualifier of QualType. ...
Definition: AddressSpaces.h:25
unsigned toTargetAddressSpace(LangAS AS)
Definition: AddressSpaces.h:61
bool isTargetAddressSpace(LangAS AS)
Definition: AddressSpaces.h:57
Dataflow Directional Tag Classes.
unsigned[(unsigned) LangAS::FirstTargetAddressSpace] LangASMap
The type of a lookup table which maps from language-specific address spaces to target-specific ones...
Definition: AddressSpaces.h:53