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 40 // CUDA specific address spaces. 41 cuda_device, 42 cuda_constant, 43 cuda_shared, 44 45 // Pointer size and extension address spaces. 46 ptr32_sptr, 47 ptr32_uptr, 48 ptr64, 49 50 // This denotes the count of language-specific address spaces and also 51 // the offset added to the target-specific address spaces, which are usually 52 // specified by address space attributes __attribute__(address_space(n))). 53 FirstTargetAddressSpace 54 }; 55 56 /// The type of a lookup table which maps from language-specific address spaces 57 /// to target-specific ones. 58 using LangASMap = unsigned[(unsigned)LangAS::FirstTargetAddressSpace]; 59 60 /// \return whether \p AS is a target-specific address space rather than a 61 /// clang AST address space 62 inline bool isTargetAddressSpace(LangAS AS) { 63 return (unsigned)AS >= (unsigned)LangAS::FirstTargetAddressSpace; 64 } 65 66 inline unsigned toTargetAddressSpace(LangAS AS) { 67 assert(isTargetAddressSpace(AS)); 68 return (unsigned)AS - (unsigned)LangAS::FirstTargetAddressSpace; 69 } 70 71 inline LangAS getLangASFromTargetAS(unsigned TargetAS) { 72 return static_cast<LangAS>((TargetAS) + 73 (unsigned)LangAS::FirstTargetAddressSpace); 74 } 75 76 inline bool isPtrSizeAddressSpace(LangAS AS) { 77 return (AS == LangAS::ptr32_sptr || AS == LangAS::ptr32_uptr || 78 AS == LangAS::ptr64); 79 } 80 81 } // namespace clang 82 83 #endif // LLVM_CLANG_BASIC_ADDRESSSPACES_H 84