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[LegalizeVectorOps] Parallelize the lo/hi part of STRICT_UINT_TO_FLOAT legalization.

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The lo and hi computation are independent. Give them the same input
chain and TokenFactor the results together.
This commit is contained in:
Craig Topper 2020-01-11 17:43:22 -08:00
parent 18c0ac74a3
commit 0744d792d5
1 changed files with 6 additions and 3 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
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@ -1375,15 +1375,18 @@ void VectorLegalizer::ExpandUINT_TO_FLOAT(SDNode *Node,
{Node->getValueType(0), MVT::Other},
{Node->getOperand(0), HI});
fHI = DAG.getNode(ISD::STRICT_FMUL, DL, {Node->getValueType(0), MVT::Other},
{SDValue(fHI.getNode(), 1), fHI, TWOHW});
{fHI.getValue(1), fHI, TWOHW});
SDValue fLO = DAG.getNode(ISD::STRICT_SINT_TO_FP, DL,
{Node->getValueType(0), MVT::Other},
{SDValue(fHI.getNode(), 1), LO});
{Node->getOperand(0), LO});
SDValue TF = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, fHI.getValue(1),
fLO.getValue(1));
// Add the two halves
SDValue Result =
DAG.getNode(ISD::STRICT_FADD, DL, {Node->getValueType(0), MVT::Other},
{SDValue(fLO.getNode(), 1), fHI, fLO});
{TF, fHI, fLO});
Results.push_back(Result);
Results.push_back(Result.getValue(1));