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