diff --git a/llvm/lib/Transforms/Scalar/NewGVN.cpp b/llvm/lib/Transforms/Scalar/NewGVN.cpp
index 7ef795fedf0f..0fa7181c489a 100644
--- a/llvm/lib/Transforms/Scalar/NewGVN.cpp
+++ b/llvm/lib/Transforms/Scalar/NewGVN.cpp
@@ -1045,7 +1045,7 @@ void NewGVN::performCongruenceFinding(Value *V, const Expression *E) {
       }
     }
     markUsersTouched(V);
-    if (Instruction *I = dyn_cast<Instruction>(V))
+    if (auto *I = dyn_cast<Instruction>(V))
       if (MemoryAccess *MA = MSSA->getMemoryAccess(I))
         markMemoryUsersTouched(MA);
   }