//===-- XCoreSelectionDAGInfo.cpp - XCore SelectionDAG Info ---------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file implements the XCoreSelectionDAGInfo class. // //===----------------------------------------------------------------------===// #include "XCoreTargetMachine.h" using namespace llvm; #define DEBUG_TYPE "xcore-selectiondag-info" SDValue XCoreSelectionDAGInfo::EmitTargetCodeForMemcpy( SelectionDAG &DAG, const SDLoc &dl, SDValue Chain, SDValue Dst, SDValue Src, SDValue Size, Align Alignment, bool isVolatile, bool AlwaysInline, MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) const { unsigned SizeBitWidth = Size.getValueSizeInBits(); // Call __memcpy_4 if the src, dst and size are all 4 byte aligned. if (!AlwaysInline && Alignment >= Align(4) && DAG.MaskedValueIsZero(Size, APInt(SizeBitWidth, 3))) { const TargetLowering &TLI = *DAG.getSubtarget().getTargetLowering(); TargetLowering::ArgListTy Args; TargetLowering::ArgListEntry Entry; Entry.Ty = DAG.getDataLayout().getIntPtrType(*DAG.getContext()); Entry.Node = Dst; Args.push_back(Entry); Entry.Node = Src; Args.push_back(Entry); Entry.Node = Size; Args.push_back(Entry); TargetLowering::CallLoweringInfo CLI(DAG); CLI.setDebugLoc(dl) .setChain(Chain) .setLibCallee(TLI.getLibcallCallingConv(RTLIB::MEMCPY), Type::getVoidTy(*DAG.getContext()), DAG.getExternalSymbol( "__memcpy_4", TLI.getPointerTy(DAG.getDataLayout())), std::move(Args)) .setDiscardResult(); std::pair<SDValue,SDValue> CallResult = TLI.LowerCallTo(CLI); return CallResult.second; } // Otherwise have the target-independent code call memcpy. return SDValue(); } |