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 | #include <cstdint> |
18 | #include <optional> |
19 | |
20 | namespace llvm { |
21 | |
22 | class AtomicMemCpyInst; |
23 | class ConstantInt; |
24 | class Instruction; |
25 | class MemCpyInst; |
26 | class MemMoveInst; |
27 | class MemSetInst; |
28 | class ScalarEvolution; |
29 | class TargetTransformInfo; |
30 | class Value; |
31 | struct Align; |
32 | |
33 | /// Emit a loop implementing the semantics of llvm.memcpy where the size is not |
34 | /// a compile-time constant. Loop will be insterted at \p InsertBefore. |
35 | void createMemCpyLoopUnknownSize( |
36 | Instruction *InsertBefore, Value *SrcAddr, Value *DstAddr, Value *CopyLen, |
37 | Align SrcAlign, Align DestAlign, bool SrcIsVolatile, bool DstIsVolatile, |
38 | bool CanOverlap, const TargetTransformInfo &TTI, |
39 | std::optional<unsigned> AtomicSize = std::nullopt); |
40 | |
41 | /// Emit a loop implementing the semantics of an llvm.memcpy whose size is a |
42 | /// compile time constant. Loop is inserted at \p InsertBefore. |
43 | void createMemCpyLoopKnownSize( |
44 | Instruction *InsertBefore, Value *SrcAddr, Value *DstAddr, |
45 | ConstantInt *CopyLen, Align SrcAlign, Align DestAlign, bool SrcIsVolatile, |
46 | bool DstIsVolatile, bool CanOverlap, const TargetTransformInfo &TTI, |
47 | std::optional<uint32_t> AtomicCpySize = std::nullopt); |
48 | |
49 | /// Expand \p MemCpy as a loop. \p MemCpy is not deleted. |
50 | void expandMemCpyAsLoop(MemCpyInst *MemCpy, const TargetTransformInfo &TTI, |
51 | ScalarEvolution *SE = nullptr); |
52 | |
53 | /// Expand \p MemMove as a loop. \p MemMove is not deleted. Returns true if the |
54 | /// memmove was lowered. |
55 | bool expandMemMoveAsLoop(MemMoveInst *MemMove, const TargetTransformInfo &TTI); |
56 | |
57 | /// Expand \p MemSet as a loop. \p MemSet is not deleted. |
58 | void expandMemSetAsLoop(MemSetInst *MemSet); |
59 | |
60 | /// Expand \p AtomicMemCpy as a loop. \p AtomicMemCpy is not deleted. |
61 | void expandAtomicMemCpyAsLoop(AtomicMemCpyInst *AtomicMemCpy, |
62 | const TargetTransformInfo &TTI, |
63 | ScalarEvolution *SE); |
64 | |
65 | } // End llvm namespace |
66 | |
67 | #endif |
68 | |