109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
//===--- CodeGenTypeCache.h - Commonly used LLVM types and info -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This structure provides a set of common types useful during IR emission.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H
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#define LLVM_CLANG_LIB_CODEGEN_CODEGENTYPECACHE_H
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#include "clang/AST/CharUnits.h"
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#include "llvm/IR/CallingConv.h"
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namespace llvm {
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class Type;
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class IntegerType;
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class PointerType;
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}
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namespace clang {
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namespace CodeGen {
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/// This structure provides a set of types that are commonly used
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/// during IR emission. It's initialized once in CodeGenModule's
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/// constructor and then copied around into new CodeGenFunctions.
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struct CodeGenTypeCache {
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/// void
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llvm::Type *VoidTy;
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/// i8, i16, i32, and i64
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llvm::IntegerType *Int8Ty, *Int16Ty, *Int32Ty, *Int64Ty;
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/// float, double
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llvm::Type *FloatTy, *DoubleTy;
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/// int
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llvm::IntegerType *IntTy;
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/// intptr_t, size_t, and ptrdiff_t, which we assume are the same size.
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union {
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llvm::IntegerType *IntPtrTy;
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llvm::IntegerType *SizeTy;
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llvm::IntegerType *PtrDiffTy;
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};
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/// void* in address space 0
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union {
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llvm::PointerType *VoidPtrTy;
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llvm::PointerType *Int8PtrTy;
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};
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/// void** in address space 0
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union {
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llvm::PointerType *VoidPtrPtrTy;
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llvm::PointerType *Int8PtrPtrTy;
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};
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/// The size and alignment of the builtin C type 'int'. This comes
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/// up enough in various ABI lowering tasks to be worth pre-computing.
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union {
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unsigned char IntSizeInBytes;
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unsigned char IntAlignInBytes;
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};
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CharUnits getIntSize() const {
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return CharUnits::fromQuantity(IntSizeInBytes);
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}
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CharUnits getIntAlign() const {
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return CharUnits::fromQuantity(IntAlignInBytes);
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}
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/// The width of a pointer into the generic address space.
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unsigned char PointerWidthInBits;
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/// The size and alignment of a pointer into the generic address space.
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union {
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unsigned char PointerAlignInBytes;
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unsigned char PointerSizeInBytes;
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unsigned char SizeSizeInBytes; // sizeof(size_t)
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unsigned char SizeAlignInBytes;
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};
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CharUnits getSizeSize() const {
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return CharUnits::fromQuantity(SizeSizeInBytes);
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}
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CharUnits getSizeAlign() const {
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return CharUnits::fromQuantity(SizeAlignInBytes);
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}
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CharUnits getPointerSize() const {
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return CharUnits::fromQuantity(PointerSizeInBytes);
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}
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CharUnits getPointerAlign() const {
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return CharUnits::fromQuantity(PointerAlignInBytes);
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}
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llvm::CallingConv::ID RuntimeCC;
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llvm::CallingConv::ID getRuntimeCC() const { return RuntimeCC; }
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llvm::CallingConv::ID BuiltinCC;
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llvm::CallingConv::ID getBuiltinCC() const { return BuiltinCC; }
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};
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} // end namespace CodeGen
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} // end namespace clang
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#endif
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