[llvm] [NewGVN] Set parent to the temporal instructions that are generated during phi-of-ops optimization (PR #66314)

[Konstantina Mitropoulou via llvm-commits]

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@@ -2666,6 +2671,7 @@ Value *NewGVN::findLeaderForInst(Instruction *TransInst,
   TempToBlock.insert({TransInst, PredBB});
   InstrDFS.insert({TransInst, IDFSNum});
 
+  PhiOfOpsCandidate = TransInst;
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kmitropoulou wrote:

You are right :) This is set every time that we process one of the operands of the new phi node. After that, I do not initialize to nullptr. Anyway, it is not needed any more.

https://github.com/llvm/llvm-project/pull/66314