LLVM  10.0.0svn
LowerMemIntrinsics.h
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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 
27 /// Emit a loop implementing the semantics of llvm.memcpy where the size is not
28 /// a compile-time constant. Loop will be insterted at \p InsertBefore.
29 void createMemCpyLoopUnknownSize(Instruction *InsertBefore, Value *SrcAddr,
30  Value *DstAddr, Value *CopyLen,
31  unsigned SrcAlign, unsigned DestAlign,
32  bool SrcIsVolatile, bool DstIsVolatile,
33  const TargetTransformInfo &TTI);
34 
35 /// Emit a loop implementing the semantics of an llvm.memcpy whose size is a
36 /// compile time constant. Loop is inserted at \p InsertBefore.
37 void createMemCpyLoopKnownSize(Instruction *InsertBefore, Value *SrcAddr,
38  Value *DstAddr, ConstantInt *CopyLen,
39  unsigned SrcAlign, unsigned DestAlign,
40  bool SrcIsVolatile, bool DstIsVolatile,
41  const TargetTransformInfo &TTI);
42 
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
This class represents lattice values for constants.
Definition: AllocatorList.h:23
void expandMemMoveAsLoop(MemMoveInst *MemMove)
Expand MemMove as a loop. MemMove is not deleted.
void expandMemSetAsLoop(MemSetInst *MemSet)
Expand MemSet as a loop. MemSet is not deleted.
void createMemCpyLoopKnownSize(Instruction *InsertBefore, Value *SrcAddr, Value *DstAddr, ConstantInt *CopyLen, unsigned SrcAlign, unsigned DestAlign, bool SrcIsVolatile, bool DstIsVolatile, const TargetTransformInfo &TTI)
Emit a loop implementing the semantics of an llvm.memcpy whose size is a compile time constant...
void createMemCpyLoopUnknownSize(Instruction *InsertBefore, Value *SrcAddr, Value *DstAddr, Value *CopyLen, unsigned SrcAlign, unsigned DestAlign, bool SrcIsVolatile, bool DstIsVolatile, const TargetTransformInfo &TTI)
Emit a loop implementing the semantics of llvm.memcpy where the size is not a compile-time constant...
void expandMemCpyAsLoop(MemCpyInst *MemCpy, const TargetTransformInfo &TTI)
Expand MemCpy as a loop. MemCpy is not deleted.