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 | /// half, bfloat, float, double |
39 | llvm::Type *HalfTy, *BFloatTy, *FloatTy, *DoubleTy; |
40 | |
41 | /// int |
42 | llvm::IntegerType *IntTy; |
43 | |
44 | /// char |
45 | llvm::IntegerType *CharTy; |
46 | |
47 | /// intptr_t, size_t, and ptrdiff_t, which we assume are the same size. |
48 | union { |
49 | llvm::IntegerType *IntPtrTy; |
50 | llvm::IntegerType *SizeTy; |
51 | llvm::IntegerType *PtrDiffTy; |
52 | }; |
53 | |
54 | /// void* in address space 0 |
55 | union { |
56 | llvm::PointerType *VoidPtrTy; |
57 | llvm::PointerType *Int8PtrTy; |
58 | }; |
59 | |
60 | /// void** in address space 0 |
61 | union { |
62 | llvm::PointerType *VoidPtrPtrTy; |
63 | llvm::PointerType *Int8PtrPtrTy; |
64 | }; |
65 | |
66 | /// void* in alloca address space |
67 | union { |
68 | llvm::PointerType *AllocaVoidPtrTy; |
69 | llvm::PointerType *AllocaInt8PtrTy; |
70 | }; |
71 | |
72 | /// The size and alignment of the builtin C type 'int'. This comes |
73 | /// up enough in various ABI lowering tasks to be worth pre-computing. |
74 | union { |
75 | unsigned char IntSizeInBytes; |
76 | unsigned char IntAlignInBytes; |
77 | }; |
78 | CharUnits getIntSize() const { |
79 | return CharUnits::fromQuantity(IntSizeInBytes); |
80 | } |
81 | CharUnits getIntAlign() const { |
82 | return CharUnits::fromQuantity(IntAlignInBytes); |
83 | } |
84 | |
85 | /// The width of a pointer into the generic address space. |
86 | unsigned char PointerWidthInBits; |
87 | |
88 | /// The size and alignment of a pointer into the generic address space. |
89 | union { |
90 | unsigned char PointerAlignInBytes; |
91 | unsigned char PointerSizeInBytes; |
92 | }; |
93 | |
94 | /// The size and alignment of size_t. |
95 | union { |
96 | unsigned char SizeSizeInBytes; // sizeof(size_t) |
97 | unsigned char SizeAlignInBytes; |
98 | }; |
99 | |
100 | LangAS ASTAllocaAddressSpace; |
101 | |
102 | CharUnits getSizeSize() const { |
103 | return CharUnits::fromQuantity(SizeSizeInBytes); |
104 | } |
105 | CharUnits getSizeAlign() const { |
106 | return CharUnits::fromQuantity(SizeAlignInBytes); |
107 | } |
108 | CharUnits getPointerSize() const { |
109 | return CharUnits::fromQuantity(PointerSizeInBytes); |
110 | } |
111 | CharUnits getPointerAlign() const { |
112 | return CharUnits::fromQuantity(PointerAlignInBytes); |
113 | } |
114 | |
115 | llvm::CallingConv::ID RuntimeCC; |
116 | llvm::CallingConv::ID getRuntimeCC() const { return RuntimeCC; } |
117 | |
118 | LangAS getASTAllocaAddressSpace() const { return ASTAllocaAddressSpace; } |
119 | }; |
120 | |
121 | } // end namespace CodeGen |
122 | } // end namespace clang |
123 | |
124 | #endif |
125 | |