--- /dev/null	2016-05-31 09:42:47.975716356 -0700
+++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/nodes/EnterUnpackFramesStackFrameNode.java	2016-12-07 13:50:20.787700981 -0800
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2013, 2014, 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.hotspot.nodes;
+
+import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_20;
+import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_10;
+
+import org.graalvm.compiler.core.common.type.StampFactory;
+import org.graalvm.compiler.graph.NodeClass;
+import org.graalvm.compiler.hotspot.HotSpotBackend;
+import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
+import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
+import org.graalvm.compiler.nodeinfo.NodeInfo;
+import org.graalvm.compiler.nodes.FixedWithNextNode;
+import org.graalvm.compiler.nodes.ValueNode;
+import org.graalvm.compiler.nodes.spi.LIRLowerable;
+import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
+import org.graalvm.compiler.word.Word;
+
+import jdk.vm.ci.meta.Value;
+
+/**
+ * Emits code to enter a low-level stack frame specifically to call out to the C++ method
+ * {@link HotSpotBackend#UNPACK_FRAMES Deoptimization::unpack_frames}.
+ */
+@NodeInfo(cycles = CYCLES_20, size = SIZE_10)
+public final class EnterUnpackFramesStackFrameNode extends FixedWithNextNode implements LIRLowerable {
+    public static final NodeClass<EnterUnpackFramesStackFrameNode> TYPE = NodeClass.create(EnterUnpackFramesStackFrameNode.class);
+
+    @Input ValueNode framePc;
+    @Input ValueNode senderSp;
+    @Input ValueNode senderFp;
+    @Input SaveAllRegistersNode registerSaver;
+
+    public EnterUnpackFramesStackFrameNode(ValueNode framePc, ValueNode senderSp, ValueNode senderFp, ValueNode registerSaver) {
+        super(TYPE, StampFactory.forVoid());
+        this.framePc = framePc;
+        this.senderSp = senderSp;
+        this.senderFp = senderFp;
+        this.registerSaver = (SaveAllRegistersNode) registerSaver;
+    }
+
+    private SaveRegistersOp getSaveRegistersOp() {
+        return registerSaver.getSaveRegistersOp();
+    }
+
+    @Override
+    public void generate(NodeLIRBuilderTool gen) {
+        Value operandValue = gen.operand(framePc);
+        Value senderSpValue = gen.operand(senderSp);
+        Value senderFpValue = gen.operand(senderFp);
+        ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitEnterUnpackFramesStackFrame(operandValue, senderSpValue, senderFpValue, getSaveRegistersOp());
+    }
+
+    @NodeIntrinsic
+    public static native void enterUnpackFramesStackFrame(Word framePc, Word senderSp, Word senderFp, long registerSaver);
+}