diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -1392,11 +1392,11 @@
     }
 
     NumReplaced++;
-    Instruction *Inst = cast<Instruction>(PN->getIncomingValue(Phi.Ith));
     PN->setIncomingValue(Phi.Ith, ExitVal);
 
     // If this instruction is dead now, delete it. Don't do it now to avoid
     // invalidating iterators.
+    Instruction *Inst = Phi.ExpansionPoint;
     if (isInstructionTriviallyDead(Inst, TLI))
       DeadInsts.push_back(Inst);