| 1 | //===--- CodeGenTypeCache.h - Commonly used LLVM types and info -*- 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 | // This structure provides a set of common types useful during IR emission. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H |
| 14 | #define LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H |
| 15 | |
| 16 | #include "clang/AST/CharUnits.h" |
| 17 | #include "clang/Basic/AddressSpaces.h" |
| 18 | #include "llvm/IR/CallingConv.h" |
| 19 | |
| 20 | namespace llvm { |
| 21 | class Type; |
| 22 | class IntegerType; |
| 23 | class PointerType; |
| 24 | } |
| 25 | |
| 26 | namespace clang { |
| 27 | namespace CodeGen { |
| 28 | |
| 29 | /// This structure provides a set of types that are commonly used |
| 30 | /// during IR emission. It's initialized once in CodeGenModule's |
| 31 | /// constructor and then copied around into new CodeGenFunctions. |
| 32 | struct CodeGenTypeCache { |
| 33 | /// void |
| 34 | llvm::Type *VoidTy; |
| 35 | |
| 36 | /// i8, i16, i32, and i64 |
| 37 | llvm::IntegerType *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty; |
| 38 | /// float, double |
| 39 | llvm::Type *HalfTy, *FloatTy, *DoubleTy; |
| 40 | |
| 41 | /// int |
| 42 | llvm::IntegerType *IntTy; |
| 43 | |
| 44 | /// intptr_t, size_t, and ptrdiff_t, which we assume are the same size. |
| 45 | union { |
| 46 | llvm::IntegerType *IntPtrTy; |
| 47 | llvm::IntegerType *SizeTy; |
| 48 | llvm::IntegerType *PtrDiffTy; |
| 49 | }; |
| 50 | |
| 51 | /// void* in address space 0 |
| 52 | union { |
| 53 | llvm::PointerType *VoidPtrTy; |
| 54 | llvm::PointerType *Int8PtrTy; |
| 55 | }; |
| 56 | |
| 57 | /// void** in address space 0 |
| 58 | union { |
| 59 | llvm::PointerType *VoidPtrPtrTy; |
| 60 | llvm::PointerType *Int8PtrPtrTy; |
| 61 | }; |
| 62 | |
| 63 | /// void* in alloca address space |
| 64 | union { |
| 65 | llvm::PointerType *AllocaVoidPtrTy; |
| 66 | llvm::PointerType *AllocaInt8PtrTy; |
| 67 | }; |
| 68 | |
| 69 | /// The size and alignment of the builtin C type 'int'. This comes |
| 70 | /// up enough in various ABI lowering tasks to be worth pre-computing. |
| 71 | union { |
| 72 | unsigned char IntSizeInBytes; |
| 73 | unsigned char IntAlignInBytes; |
| 74 | }; |
| 75 | CharUnits getIntSize() const { |
| 76 | return CharUnits::fromQuantity(IntSizeInBytes); |
| 77 | } |
| 78 | CharUnits getIntAlign() const { |
| 79 | return CharUnits::fromQuantity(IntAlignInBytes); |
| 80 | } |
| 81 | |
| 82 | /// The width of a pointer into the generic address space. |
| 83 | unsigned char PointerWidthInBits; |
| 84 | |
| 85 | /// The size and alignment of a pointer into the generic address space. |
| 86 | union { |
| 87 | unsigned char PointerAlignInBytes; |
| 88 | unsigned char PointerSizeInBytes; |
| 89 | }; |
| 90 | |
| 91 | /// The size and alignment of size_t. |
| 92 | union { |
| 93 | unsigned char SizeSizeInBytes; // sizeof(size_t) |
| 94 | unsigned char SizeAlignInBytes; |
| 95 | }; |
| 96 | |
| 97 | LangAS ASTAllocaAddressSpace; |
| 98 | |
| 99 | CharUnits getSizeSize() const { |
| 100 | return CharUnits::fromQuantity(SizeSizeInBytes); |
| 101 | } |
| 102 | CharUnits getSizeAlign() const { |
| 103 | return CharUnits::fromQuantity(SizeAlignInBytes); |
| 104 | } |
| 105 | CharUnits getPointerSize() const { |
| 106 | return CharUnits::fromQuantity(PointerSizeInBytes); |
| 107 | } |
| 108 | CharUnits getPointerAlign() const { |
| 109 | return CharUnits::fromQuantity(PointerAlignInBytes); |
| 110 | } |
| 111 | |
| 112 | llvm::CallingConv::ID RuntimeCC; |
| 113 | llvm::CallingConv::ID getRuntimeCC() const { return RuntimeCC; } |
| 114 | |
| 115 | LangAS getASTAllocaAddressSpace() const { return ASTAllocaAddressSpace; } |
| 116 | }; |
| 117 | |
| 118 | } // end namespace CodeGen |
| 119 | } // end namespace clang |
| 120 | |
| 121 | #endif |
| 122 |