--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/debug/instrumentation/InstrumentationBeginNode.java	2016-12-09 00:55:28.245134653 -0800
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2015, 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 org.graalvm.compiler.nodes.debug.instrumentation;
+
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED;
+
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.nodeinfo.InputType;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.AbstractStateSplit;
+import org.graalvm.compiler.nodes.ValueNode;
+import org.graalvm.compiler.nodes.spi.LIRLowerable;
+import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
+
+/**
+ * The {@code InstrumentationBeginNode} represents the boundary of the instrumentation. It also
+ * maintains the target of the instrumentation.
+ */
+@NodeInfo(cycles = CYCLES_IGNORED, size = SIZE_IGNORED)
+public final class InstrumentationBeginNode extends AbstractStateSplit implements LIRLowerable {
+
+    public static final NodeClass<InstrumentationBeginNode> TYPE = NodeClass.create(InstrumentationBeginNode.class);
+
+    @OptionalInput(value = InputType.Unchecked) protected ValueNode target;
+    private final boolean anchored;
+
+    public InstrumentationBeginNode(boolean anchored) {
+        super(TYPE, StampFactory.forVoid());
+        this.anchored = anchored;
+        this.target = null;
+
+    }
+
+    public boolean isAnchored() {
+        return anchored;
+    }
+
+    public ValueNode getTarget() {
+        return target;
+    }
+
+    public void setTarget(ValueNode target) {
+        updateUsages(this.target, target);
+        this.target = target;
+    }
+
+    @Override
+    public void generate(NodeLIRBuilderTool generator) {
+        // do nothing
+    }
+
+}