1 //===--- CodeGenTypeCache.h - Commonly used LLVM types and info -*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This structure provides a set of common types useful during IR emission.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H
15 #define LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H
17 #include "clang/AST/CharUnits.h"
18 #include "llvm/IR/CallingConv.h"
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 {
36 /// i8, i16, i32, and i64
37 llvm::IntegerType *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty;
39 llvm::Type *FloatTy, *DoubleTy;
42 llvm::IntegerType *IntTy;
44 /// intptr_t, size_t, and ptrdiff_t, which we assume are the same size.
46 llvm::IntegerType *IntPtrTy;
47 llvm::IntegerType *SizeTy;
48 llvm::IntegerType *PtrDiffTy;
51 /// void* in address space 0
53 llvm::PointerType *VoidPtrTy;
54 llvm::PointerType *Int8PtrTy;
57 /// void** in address space 0
59 llvm::PointerType *VoidPtrPtrTy;
60 llvm::PointerType *Int8PtrPtrTy;
63 /// void* in alloca address space
65 llvm::PointerType *AllocaVoidPtrTy;
66 llvm::PointerType *AllocaInt8PtrTy;
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.
72 unsigned char IntSizeInBytes;
73 unsigned char IntAlignInBytes;
75 CharUnits getIntSize() const {
76 return CharUnits::fromQuantity(IntSizeInBytes);
78 CharUnits getIntAlign() const {
79 return CharUnits::fromQuantity(IntAlignInBytes);
82 /// The width of a pointer into the generic address space.
83 unsigned char PointerWidthInBits;
85 /// The size and alignment of a pointer into the generic address space.
87 unsigned char PointerAlignInBytes;
88 unsigned char PointerSizeInBytes;
91 /// The size and alignment of size_t.
93 unsigned char SizeSizeInBytes; // sizeof(size_t)
94 unsigned char SizeAlignInBytes;
97 CharUnits getSizeSize() const {
98 return CharUnits::fromQuantity(SizeSizeInBytes);
100 CharUnits getSizeAlign() const {
101 return CharUnits::fromQuantity(SizeAlignInBytes);
103 CharUnits getPointerSize() const {
104 return CharUnits::fromQuantity(PointerSizeInBytes);
106 CharUnits getPointerAlign() const {
107 return CharUnits::fromQuantity(PointerAlignInBytes);
110 llvm::CallingConv::ID RuntimeCC;
111 llvm::CallingConv::ID getRuntimeCC() const { return RuntimeCC; }
112 llvm::CallingConv::ID BuiltinCC;
113 llvm::CallingConv::ID getBuiltinCC() const { return BuiltinCC; }
116 } // end namespace CodeGen
117 } // end namespace clang