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241f08ad4e
The argument list vector is never used after it has been passed to the CallLoweringInfo and moving it to the CallLoweringInfo is cleaner and pretty much as cheap as keeping a pointer to it. llvm-svn: 212135
61 lines
2.3 KiB
C++
61 lines
2.3 KiB
C++
//===-- AArch64SelectionDAGInfo.cpp - AArch64 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 AArch64SelectionDAGInfo class.
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//
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//===----------------------------------------------------------------------===//
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#include "AArch64TargetMachine.h"
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using namespace llvm;
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#define DEBUG_TYPE "aarch64-selectiondag-info"
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AArch64SelectionDAGInfo::AArch64SelectionDAGInfo(const DataLayout *DL)
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: TargetSelectionDAGInfo(DL) {}
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AArch64SelectionDAGInfo::~AArch64SelectionDAGInfo() {}
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SDValue AArch64SelectionDAGInfo::EmitTargetCodeForMemset(
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SelectionDAG &DAG, SDLoc dl, SDValue Chain, SDValue Dst, SDValue Src,
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SDValue Size, unsigned Align, bool isVolatile,
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MachinePointerInfo DstPtrInfo) const {
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// Check to see if there is a specialized entry-point for memory zeroing.
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ConstantSDNode *V = dyn_cast<ConstantSDNode>(Src);
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ConstantSDNode *SizeValue = dyn_cast<ConstantSDNode>(Size);
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const char *bzeroEntry =
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(V && V->isNullValue())
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? DAG.getTarget().getSubtarget<AArch64Subtarget>().getBZeroEntry()
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: nullptr;
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// For small size (< 256), it is not beneficial to use bzero
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// instead of memset.
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if (bzeroEntry && (!SizeValue || SizeValue->getZExtValue() > 256)) {
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const AArch64TargetLowering &TLI =
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*static_cast<const AArch64TargetLowering *>(
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DAG.getTarget().getTargetLowering());
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EVT IntPtr = TLI.getPointerTy();
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Type *IntPtrTy = getDataLayout()->getIntPtrType(*DAG.getContext());
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TargetLowering::ArgListTy Args;
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TargetLowering::ArgListEntry Entry;
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Entry.Node = Dst;
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Entry.Ty = IntPtrTy;
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Args.push_back(Entry);
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Entry.Node = Size;
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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(CallingConv::C, Type::getVoidTy(*DAG.getContext()),
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DAG.getExternalSymbol(bzeroEntry, IntPtr), 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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return SDValue();
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}
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