--- /dev/null	2017-01-22 10:16:57.869617664 -0800
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/nodes/ExplodeLoopNode.java	2017-02-15 17:09:16.871559901 -0800
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2012, 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.replacements.nodes;
+
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
+
+import java.util.ArrayList;
+
+import org.graalvm.compiler.api.replacements.Snippet.VarargsParameter;
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.Node;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.FixedWithNextNode;
+import org.graalvm.compiler.nodes.LoopBeginNode;
+
+/**
+ * Placeholder node to denote to snippet preparation that the following loop must be completely
+ * unrolled.
+ *
+ * @see VarargsParameter
+ */
+@NodeInfo(cycles = CYCLES_0, size = SIZE_0)
+public final class ExplodeLoopNode extends FixedWithNextNode {
+    public static final NodeClass<ExplodeLoopNode> TYPE = NodeClass.create(ExplodeLoopNode.class);
+
+    public ExplodeLoopNode() {
+        super(TYPE, StampFactory.forVoid());
+    }
+
+    public LoopBeginNode findLoopBegin() {
+        Node currentNext = next();
+        ArrayList<Node> succs = new ArrayList<>();
+        while (!(currentNext instanceof LoopBeginNode)) {
+            assert currentNext != null : "cannot find loop after " + this;
+            for (Node n : currentNext.cfgSuccessors()) {
+                succs.add(n);
+            }
+            if (succs.size() == 1) {
+                currentNext = succs.get(0);
+            } else {
+                return null;
+            }
+        }
+        return (LoopBeginNode) currentNext;
+    }
+
+    /**
+     * A call to this method must be placed immediately prior to the loop that is to be exploded.
+     */
+    @NodeIntrinsic
+    public static native void explodeLoop();
+}