/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/Target/XCore/XCoreSelectionDAGInfo.cpp
Line | Count | Source |
1 | | //===-- XCoreSelectionDAGInfo.cpp - XCore SelectionDAG Info ---------------===// |
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 | | // This file implements the XCoreSelectionDAGInfo class. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #include "XCoreTargetMachine.h" |
14 | | using namespace llvm; |
15 | | |
16 | | #define DEBUG_TYPE "xcore-selectiondag-info" |
17 | | |
18 | | SDValue XCoreSelectionDAGInfo::EmitTargetCodeForMemcpy( |
19 | | SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, |
20 | | SDValue Size, unsigned Align, bool isVolatile, bool AlwaysInline, |
21 | 4 | MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const { |
22 | 4 | unsigned SizeBitWidth = Size.getValueSizeInBits(); |
23 | 4 | // Call __memcpy_4 if the src, dst and size are all 4 byte aligned. |
24 | 4 | if (!AlwaysInline && (Align & 3) == 0 && |
25 | 4 | DAG.MaskedValueIsZero(Size, APInt(SizeBitWidth, 3))3 ) { |
26 | 2 | const TargetLowering &TLI = *DAG.getSubtarget().getTargetLowering(); |
27 | 2 | TargetLowering::ArgListTy Args; |
28 | 2 | TargetLowering::ArgListEntry Entry; |
29 | 2 | Entry.Ty = DAG.getDataLayout().getIntPtrType(*DAG.getContext()); |
30 | 2 | Entry.Node = Dst; Args.push_back(Entry); |
31 | 2 | Entry.Node = Src; Args.push_back(Entry); |
32 | 2 | Entry.Node = Size; Args.push_back(Entry); |
33 | 2 | |
34 | 2 | TargetLowering::CallLoweringInfo CLI(DAG); |
35 | 2 | CLI.setDebugLoc(dl) |
36 | 2 | .setChain(Chain) |
37 | 2 | .setLibCallee(TLI.getLibcallCallingConv(RTLIB::MEMCPY), |
38 | 2 | Type::getVoidTy(*DAG.getContext()), |
39 | 2 | DAG.getExternalSymbol( |
40 | 2 | "__memcpy_4", TLI.getPointerTy(DAG.getDataLayout())), |
41 | 2 | std::move(Args)) |
42 | 2 | .setDiscardResult(); |
43 | 2 | |
44 | 2 | std::pair<SDValue,SDValue> CallResult = TLI.LowerCallTo(CLI); |
45 | 2 | return CallResult.second; |
46 | 2 | } |
47 | 2 | |
48 | 2 | // Otherwise have the target-independent code call memcpy. |
49 | 2 | return SDValue(); |
50 | 2 | } |