[llvm] [SelectionDAG][x86] Ensure vector reduction optimization (PR #144231)

[Phoebe Wang via llvm-commits]

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@@ -47255,6 +47321,36 @@ static SDValue combineExtractVectorElt(SDNode *N, SelectionDAG &DAG,
   return SDValue();
 }
 
+static SDValue combineExtractVectorEltAndOperand(SDNode* N, SelectionDAG& DAG,
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phoebewang wrote:

Yes. That would be good to show which code affect the test change.

https://github.com/llvm/llvm-project/pull/144231