--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/memory/AbstractWriteNode.java	Thu Mar 28 11:06:00 2019 -0700
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/memory/AbstractWriteNode.java	Thu Mar 28 19:39:14 2019 +0100
@@ -27,6 +27,7 @@
 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
 
+import org.graalvm.compiler.core.common.type.Stamp;
 import org.graalvm.compiler.core.common.type.StampFactory;
 import org.graalvm.compiler.graph.Node;
 import org.graalvm.compiler.graph.NodeClass;
@@ -90,4 +91,6 @@
         updateUsages(lastLocationAccess, newLla);
         lastLocationAccess = newLla;
     }
+
+    public abstract Stamp getAccessStamp();
 }