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diff --git a/include/llvm/Transforms/Utils/LowerMemIntrinsics.h b/include/llvm/Transforms/Utils/LowerMemIntrinsics.h
new file mode 100644
index 0000000000000..e4906b709e4bf
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+++ b/include/llvm/Transforms/Utils/LowerMemIntrinsics.h
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+//===- 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