--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/call/BoxingDispatchNode.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes.call;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.utilities.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+import com.oracle.truffle.ruby.runtime.objects.*;
+
+/**
+ * A node in the dispatch chain that boxes the receiver into a full Ruby {@link RubyBasicObject}.
+ * This node is initially created as an {@link UninitializedBoxingDispatchNode} and only becomes
+ * this node when we know that we do need to box on the fast path. Within this node we specialized
+ * for the case that the receiver is always already boxed.
+ */
+public class BoxingDispatchNode extends UnboxedDispatchNode {
+
+    @Child protected BoxedDispatchNode next;
+
+    private final BranchProfile boxBranch = new BranchProfile();
+
+    public BoxingDispatchNode(RubyContext context, SourceSection sourceSection, BoxedDispatchNode next) {
+        super(context, sourceSection);
+
+        this.next = adoptChild(next);
+    }
+
+    @Override
+    public Object dispatch(VirtualFrame frame, Object receiverObject, RubyProc blockObject, Object[] argumentsObjects) {
+        RubyBasicObject boxedReceiverObject;
+
+        if (receiverObject instanceof RubyBasicObject) {
+            boxedReceiverObject = (RubyBasicObject) receiverObject;
+        } else {
+            boxBranch.enter();
+            boxedReceiverObject = getContext().getCoreLibrary().box(receiverObject);
+        }
+
+        return next.dispatch(frame, boxedReceiverObject, blockObject, argumentsObjects);
+    }
+
+}