[llvm] [SelectionDAG] Handle more opcodes in canCreateUndefOrPoison (PR #84921)

[Simon Pilgrim via llvm-commits]

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@@ -15383,6 +15383,12 @@ SDValue DAGCombiner::visitFREEZE(SDNode *N) {
   if (DAG.isGuaranteedNotToBeUndefOrPoison(N0, /*PoisonOnly*/ false))
     return N0;
 
+  // There is a reverse transform in visitEXTRACT_VECTOR_ELT, so we need to
+  // avoid inifite looping by not pulling freeze through EXTRACT_VECTOR_ELT
+  // here.
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RKSimon wrote:

I would really like to remove that fold .....................

https://github.com/llvm/llvm-project/pull/84921