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67c04e77e5
shorter/easier and have the DAG use that to do the same lookup. This can be used in the future for TargetMachine based caching lookups from the MachineFunction easily. Update the MIPS subtarget switching machinery to update this pointer at the same time it runs. llvm-svn: 214838
59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
//===-- XCoreSelectionDAGInfo.cpp - XCore SelectionDAG Info ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the XCoreSelectionDAGInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "XCoreTargetMachine.h"
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using namespace llvm;
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#define DEBUG_TYPE "xcore-selectiondag-info"
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XCoreSelectionDAGInfo::XCoreSelectionDAGInfo(const DataLayout &DL)
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: TargetSelectionDAGInfo(&DL) {}
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XCoreSelectionDAGInfo::~XCoreSelectionDAGInfo() {
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}
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SDValue XCoreSelectionDAGInfo::
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EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl, SDValue Chain,
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SDValue Dst, SDValue Src, SDValue Size, unsigned Align,
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bool isVolatile, bool AlwaysInline,
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MachinePointerInfo DstPtrInfo,
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MachinePointerInfo SrcPtrInfo) const
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{
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unsigned SizeBitWidth = Size.getValueType().getSizeInBits();
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// Call __memcpy_4 if the src, dst and size are all 4 byte aligned.
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if (!AlwaysInline && (Align & 3) == 0 &&
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DAG.MaskedValueIsZero(Size, APInt(SizeBitWidth, 3))) {
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const TargetLowering &TLI = *DAG.getSubtarget().getTargetLowering();
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TargetLowering::ArgListTy Args;
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TargetLowering::ArgListEntry Entry;
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Entry.Ty = TLI.getDataLayout()->getIntPtrType(*DAG.getContext());
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Entry.Node = Dst; Args.push_back(Entry);
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Entry.Node = Src; Args.push_back(Entry);
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Entry.Node = Size; Args.push_back(Entry);
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TargetLowering::CallLoweringInfo CLI(DAG);
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CLI.setDebugLoc(dl).setChain(Chain)
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.setCallee(TLI.getLibcallCallingConv(RTLIB::MEMCPY),
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Type::getVoidTy(*DAG.getContext()),
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DAG.getExternalSymbol("__memcpy_4", TLI.getPointerTy()),
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std::move(Args), 0)
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.setDiscardResult();
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std::pair<SDValue,SDValue> CallResult = TLI.LowerCallTo(CLI);
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return CallResult.second;
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}
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// Otherwise have the target-independent code call memcpy.
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return SDValue();
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}
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