1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Transforms/Utils/CloneFunction.cpp b/lib/Transforms/Utils/CloneFunction.cpp
index 7e75e8847785..9c4e13903ed7 100644
--- a/lib/Transforms/Utils/CloneFunction.cpp
+++ b/lib/Transforms/Utils/CloneFunction.cpp
@@ -341,8 +341,9 @@ void PruningFunctionCloner::CloneBlock(const BasicBlock *BB,
               SimplifyInstruction(NewInst, BB->getModule()->getDataLayout())) {
         // On the off-chance that this simplifies to an instruction in the old
         // function, map it back into the new function.
-        if (Value *MappedV = VMap.lookup(V))
-          V = MappedV;
+        if (NewFunc != OldFunc)
+          if (Value *MappedV = VMap.lookup(V))
+            V = MappedV;
 
         if (!NewInst->mayHaveSideEffects()) {
           VMap[&*II] = V;