diff --git a/lib/CodeGen/InterleavedLoadCombinePass.cpp b/lib/CodeGen/InterleavedLoadCombinePass.cpp
index 9525da849e2..770c4952d16 100644
--- a/lib/CodeGen/InterleavedLoadCombinePass.cpp
+++ b/lib/CodeGen/InterleavedLoadCombinePass.cpp
@@ -940,8 +940,8 @@ public:
   /// \param V input value
   /// \param Result result polynomial
   static void computePolynomial(Value &V, Polynomial &Result) {
-    if (isa<BinaryOperator>(&V))
-      computePolynomialBinOp(*dyn_cast<BinaryOperator>(&V), Result);
+    if (auto *BO = dyn_cast<BinaryOperator>(&V))
+      computePolynomialBinOp(*BO, Result);
     else
       Result = Polynomial(&V);
   }