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[DAGCombiner] Simplify some code in visitBITCAST. NFCI

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llvm-svn: 342826
This commit is contained in:
Craig Topper 2018-09-22 23:12:34 +00:00
parent ae0244420d
commit 85a06a9918
1 changed files with 3 additions and 9 deletions
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12
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -9841,15 +9841,9 @@ SDValue DAGCombiner::visitBITCAST(SDNode *N) {
// First check to see if this is all constant.
if (!LegalTypes &&
N0.getOpcode() == ISD::BUILD_VECTOR && N0.getNode()->hasOneUse() &&
VT.isVector()) {
bool isSimple = cast<BuildVectorSDNode>(N0)->isConstant();
EVT DestEltVT = N->getValueType(0).getVectorElementType();
assert(!DestEltVT.isVector() &&
"Element type of vector ValueType must not be vector!");
if (isSimple)
return ConstantFoldBITCASTofBUILD_VECTOR(N0.getNode(), DestEltVT);
}
VT.isVector() && cast<BuildVectorSDNode>(N0)->isConstant())
return ConstantFoldBITCASTofBUILD_VECTOR(N0.getNode(),
VT.getVectorElementType());
// If the input is a constant, let getNode fold it.
if (isa<ConstantSDNode>(N0) || isa<ConstantFPSDNode>(N0)) {