--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/type/AbstractPointerStamp.java	Tue Sep 24 08:54:08 2019 -0700
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.common/src/org/graalvm/compiler/core/common/type/AbstractPointerStamp.java	Tue Sep 24 12:47:15 2019 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -112,14 +112,14 @@
         return pointer.asAlwaysNull();
     }
 
-    public Stamp asNonNull() {
+    public AbstractPointerStamp asNonNull() {
         if (isEmpty()) {
             return this;
         }
         return copyWith(true, false);
     }
 
-    public Stamp asMaybeNull() {
+    public AbstractPointerStamp asMaybeNull() {
         if (isEmpty()) {
             return this;
         }