clang-3977809/prebuilt_include/llvm/include/llvm/Transforms/Utils/LowerMemIntrinsics.h

//===- llvm/Transforms/Utils/LowerMemintrinsics.h ---------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Lower memset, memcpy, memmov intrinsics to loops (e.g. for targets without
// library support).
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H
#define LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H

namespace llvm {

class Instruction;
class MemCpyInst;
class MemMoveInst;
class MemSetInst;
class Value;

/// Emit a loop implementing the semantics of llvm.memcpy with the equivalent
/// arguments at \p InsertBefore.
void createMemCpyLoop(Instruction *InsertBefore,
                      Value *SrcAddr, Value *DstAddr, Value *CopyLen,
                      unsigned SrcAlign, unsigned DestAlign,
                      bool SrcIsVolatile, bool DstIsVolatile);

/// Expand \p MemCpy as a loop. \p MemCpy is not deleted.
void expandMemCpyAsLoop(MemCpyInst *MemCpy);

/// Expand \p MemMove as a loop. \p MemMove is not deleted.
void expandMemMoveAsLoop(MemMoveInst *MemMove);

/// Expand \p MemSet as a loop. \p MemSet is not deleted.
void expandMemSetAsLoop(MemSetInst *MemSet);

} // End llvm namespace

#endif