[llvm] [DAG] narrowExtractedVectorBinOp - ensure we limit late node creation to LegalOperations only (PR #72130)

[Matt Arsenault via llvm-commits]

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@@ -23960,7 +23960,8 @@ static SDValue narrowExtractedVectorBinOp(SDNode *Extract, SelectionDAG &DAG,
   // Bail out if the target does not support a narrower version of the binop.
   EVT NarrowBVT = EVT::getVectorVT(*DAG.getContext(), WideBVT.getScalarType(),
                                    WideNumElts / NarrowingRatio);
-  if (!TLI.isOperationLegalOrCustomOrPromote(BOpcode, NarrowBVT))
+  if (!TLI.isOperationLegalOrCustomOrPromote(BOpcode, NarrowBVT,
+                                             LegalOperations))
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arsenm wrote:

This part seems obvious 

https://github.com/llvm/llvm-project/pull/72130