1 //===- llvm/Transforms/Utils/LowerMemIntrinsics.h ---------------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // Lower memset, memcpy, memmov intrinsics to loops (e.g. for targets without
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H
15 #define LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H
24 class TargetTransformInfo;
28 /// Emit a loop implementing the semantics of llvm.memcpy where the size is not
29 /// a compile-time constant. Loop will be insterted at \p InsertBefore.
30 void createMemCpyLoopUnknownSize(Instruction *InsertBefore, Value *SrcAddr,
31 Value *DstAddr, Value *CopyLen,
32 Align SrcAlign, Align DestAlign,
33 bool SrcIsVolatile, bool DstIsVolatile,
34 const TargetTransformInfo &TTI);
36 /// Emit a loop implementing the semantics of an llvm.memcpy whose size is a
37 /// compile time constant. Loop is inserted at \p InsertBefore.
38 void createMemCpyLoopKnownSize(Instruction *InsertBefore, Value *SrcAddr,
39 Value *DstAddr, ConstantInt *CopyLen,
40 Align SrcAlign, Align DestAlign,
41 bool SrcIsVolatile, bool DstIsVolatile,
42 const TargetTransformInfo &TTI);
44 /// Expand \p MemCpy as a loop. \p MemCpy is not deleted.
45 void expandMemCpyAsLoop(MemCpyInst *MemCpy, const TargetTransformInfo &TTI);
47 /// Expand \p MemMove as a loop. \p MemMove is not deleted.
48 void expandMemMoveAsLoop(MemMoveInst *MemMove);
50 /// Expand \p MemSet as a loop. \p MemSet is not deleted.
51 void expandMemSetAsLoop(MemSetInst *MemSet);
53 } // End llvm namespace