--- old/src/hotspot/share/ci/ciArrayKlass.hpp	2019-03-11 14:25:17.834355823 +0100
+++ new/src/hotspot/share/ci/ciArrayKlass.hpp	2019-03-11 14:25:17.610355827 +0100
@@ -56,7 +56,12 @@
   bool is_array_klass() const { return true; }
   bool is_java_klass() const  { return true; }
 
+  // The one-level type of the array elements.
+  virtual ciKlass* element_klass() { return NULL; }
+
   static ciArrayKlass* make(ciType* element_type);
+
+  int array_header_in_bytes();
 };
 
 #endif // SHARE_CI_CIARRAYKLASS_HPP