--- a/src/hotspot/share/opto/mulnode.hpp	Tue Jan 15 16:40:31 2019 -0500
+++ b/src/hotspot/share/opto/mulnode.hpp	Tue Jan 15 22:54:09 2019 +0100
@@ -289,6 +289,7 @@
 // Multiply shorts into integers and add them.
 // Semantics: I_OUT = S1 * S2 + S3 * S4
 class MulAddS2INode : public Node {
+  virtual uint hash() const;
 public:
   MulAddS2INode(Node* in1, Node *in2, Node *in3, Node* in4) : Node(0, in1, in2, in3, in4) {}
   virtual int Opcode() const;