diff --git a/llvm/include/llvm/CodeGen/SelectionDAGNodes.h b/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
--- a/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -758,6 +758,7 @@
 
     use_iterator() = default;
     use_iterator(const use_iterator &I) = default;
+    use_iterator &operator=(const use_iterator &) = default;
 
     bool operator==(const use_iterator &x) const { return Op == x.Op; }
     bool operator!=(const use_iterator &x) const {