[llvm] [PowerPC] Check ResNo at end of BitPermutationSelector::Select32 (PR #151429)

[Nemanja Ivanovic via llvm-commits]

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@@ -4104,8 +4104,9 @@ bool PPCDAGToDAGISel::tryBitPermutation(SDNode *N) {
   case ISD::AND:
   case ISD::OR: {
     BitPermutationSelector BPS(CurDAG);
-    if (SDNode *New = BPS.Select(N)) {
-      ReplaceNode(N, New);
+    if (SDValue New = BPS.Select(N)) {
+      CurDAG->ReplaceAllUsesWith(N, &New);
+      CurDAG->RemoveDeadNode(N);
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nemanjai wrote:

Do we need the call to `RemoveDeadNode()` here? Doesn't the DAG automatically do CSE?

https://github.com/llvm/llvm-project/pull/151429