1 files changed, 5 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Utils/CloneFunction.cpp b/llvm/lib/Transforms/Utils/CloneFunction.cpp
index 6ff05fe3e59..fcdb45b6611 100644
--- a/llvm/lib/Transforms/Utils/CloneFunction.cpp
+++ b/llvm/lib/Transforms/Utils/CloneFunction.cpp
@@ -296,9 +296,11 @@ void PruningFunctionCloner::CloneBlock(const BasicBlock *BB,
         if (Value *MappedV = VMap.lookup(V))
           V = MappedV;
 
-        VMap[&*II] = V;
-        delete NewInst;
-        continue;
+        if (!NewInst->mayHaveSideEffects()) {
+          VMap[&*II] = V;
+          delete NewInst;
+          continue;
+        }
       }
     }