[DAG] Use recursivelyDeleteUnusedNodes in ReplaceLoadWithPromotedLoad

It simplifies the code overall and removes the need for manual bookkeeping.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D130444

Author: deadalnix

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -1263,11 +1263,12 @@ void DAGCombiner::ReplaceLoadWithPromotedLoad(SDNode *Load, SDNode *ExtLoad) {
 
   LLVM_DEBUG(dbgs() << "\nReplacing.9 "; Load->dump(&DAG); dbgs() << "\nWith: ";
              Trunc.dump(&DAG); dbgs() << '\n');
-  WorklistRemover DeadNodes(*this);
+
   DAG.ReplaceAllUsesOfValueWith(SDValue(Load, 0), Trunc);
   DAG.ReplaceAllUsesOfValueWith(SDValue(Load, 1), SDValue(ExtLoad, 1));
-  deleteAndRecombine(Load);
+
   AddToWorklist(Trunc.getNode());
+  recursivelyDeleteUnusedNodes(Load);
 }
 
 SDValue DAGCombiner::PromoteOperand(SDValue Op, EVT PVT, bool &Replace) {