--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.vm.ci/share/classes/jdk.vm.ci.code/src/jdk/vm/ci/code/site/DataPatch.java	Wed Jan 20 14:22:46 2016 +0100
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2016, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.vm.ci.code.site;
+
+import java.util.Objects;
+
+import jdk.vm.ci.meta.JavaConstant;
+
+/**
+ * Represents a code site that references some data. The associated data can be either a
+ * {@link DataSectionReference reference} to the data section, or it may be an inlined
+ * {@link JavaConstant} that needs to be patched.
+ */
+public final class DataPatch extends Site {
+
+    public Reference reference;
+    public Object note;
+
+    public DataPatch(int pcOffset, Reference reference) {
+        super(pcOffset);
+        this.reference = reference;
+        this.note = null;
+    }
+
+    public DataPatch(int pcOffset, Reference reference, Object note) {
+        super(pcOffset);
+        this.reference = reference;
+        this.note = note;
+    }
+
+    @Override
+    public String toString() {
+        if (note != null) {
+            return String.format("%d[<data patch referring to %s>, note: %s]", pcOffset, reference.toString(), note.toString());
+        } else {
+            return String.format("%d[<data patch referring to %s>]", pcOffset, reference.toString());
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof DataPatch) {
+            DataPatch that = (DataPatch) obj;
+            if (this.pcOffset == that.pcOffset && Objects.equals(this.reference, that.reference) && Objects.equals(this.note, that.note)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}