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[X86][SSE] Use SDValue::getConstantOperandVal helper. NFCI. 

Also reordered an if statement to test low cost comparisons first

llvm-svn: 294748
This commit is contained in:
Simon Pilgrim 2017-02-10 14:27:59 +00:00
parent d0b2ccd219
commit 8c8b10389d
1 changed files with 6 additions and 11 deletions
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17
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -28826,13 +28826,11 @@ static SDValue combineExtractVectorElt(SDNode *N, SelectionDAG &DAG,
return DAG.getNode(X86ISD::MMX_MOVD2W, dl, MVT::i32, MMXSrc);
}
if (VT == MVT::i1 && isa<ConstantSDNode>(N->getOperand(1)) &&
InputVector.getOpcode() == ISD::BITCAST &&
if (VT == MVT::i1 && InputVector.getOpcode() == ISD::BITCAST &&
isa<ConstantSDNode>(N->getOperand(1)) &&
isa<ConstantSDNode>(InputVector.getOperand(0))) {
uint64_t ExtractedElt =
cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
uint64_t InputValue =
cast<ConstantSDNode>(InputVector.getOperand(0))->getZExtValue();
uint64_t ExtractedElt = N->getConstantOperandVal(1);
uint64_t InputValue = InputVector.getConstantOperandVal(0);
uint64_t Res = (InputValue >> ExtractedElt) & 1;
return DAG.getConstant(Res, dl, MVT::i1);
}
@ -28877,9 +28875,7 @@ static SDValue combineExtractVectorElt(SDNode *N, SelectionDAG &DAG,
return SDValue();
// Record which element was extracted.
ExtractedElements |=
1 << cast<ConstantSDNode>(Extract->getOperand(1))->getZExtValue();
ExtractedElements |= 1 << Extract->getConstantOperandVal(1);
Uses.push_back(Extract);
}
@ -28939,8 +28935,7 @@ static SDValue combineExtractVectorElt(SDNode *N, SelectionDAG &DAG,
UE = Uses.end(); UI != UE; ++UI) {
SDNode *Extract = *UI;
SDValue Idx = Extract->getOperand(1);
uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
uint64_t IdxVal = Extract->getConstantOperandVal(1);
DAG.ReplaceAllUsesOfValueWith(SDValue(Extract, 0), Vals[IdxVal]);
}