1 //===- llvm/Transforms/Utils/LowerMemIntrinsics.h ---------------*- C++ -*-===// 2 // 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 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Lower memset, memcpy, memmov intrinsics to loops (e.g. for targets without 10 // library support). 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H 15 #define LLVM_TRANSFORMS_UTILS_LOWERMEMINTRINSICS_H 16 17 namespace llvm { 18 19 class ConstantInt; 20 class Instruction; 21 class MemCpyInst; 22 class MemMoveInst; 23 class MemSetInst; 24 class TargetTransformInfo; 25 class Value; 26 struct Align; 27 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); 35 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); 43 44 /// Expand \p MemCpy as a loop. \p MemCpy is not deleted. 45 void expandMemCpyAsLoop(MemCpyInst *MemCpy, const TargetTransformInfo &TTI); 46 47 /// Expand \p MemMove as a loop. \p MemMove is not deleted. 48 void expandMemMoveAsLoop(MemMoveInst *MemMove); 49 50 /// Expand \p MemSet as a loop. \p MemSet is not deleted. 51 void expandMemSetAsLoop(MemSetInst *MemSet); 52 53 } // End llvm namespace 54 55 #endif 56