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[DAGCombiner] Replace call getSExtOrTrunc with a truncate. NFC

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The extend case should never occur. The sign extend would be an
arbitrary choice, remove it to avoid confusion.
This commit is contained in:
Craig Topper 2022-04-06 09:14:51 -07:00
parent 1342b861a3
commit 5b5f59428c
1 changed files with 3 additions and 2 deletions
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5
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -19474,8 +19474,9 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) {
// EXTRACT_VECTOR_ELT may widen the extracted vector.
SDValue InOp = VecOp.getOperand(0);
if (InOp.getValueType() != ScalarVT) {
assert(InOp.getValueType().isInteger() && ScalarVT.isInteger());
return DAG.getSExtOrTrunc(InOp, DL, ScalarVT);
assert(InOp.getValueType().isInteger() && ScalarVT.isInteger() &&
InOp.getValueType().bitsGT(ScalarVT));
return DAG.getNode(ISD::TRUNCATE, DL, ScalarVT, InOp);
}
return InOp;
}