--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/Unwind.java	Wed May 18 18:09:20 2011 +0200
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2011, 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 com.sun.c1x.ir;
+
+import com.oracle.graal.graph.*;
+import com.sun.c1x.debug.*;
+import com.sun.cri.ci.*;
+
+/**
+ * Unwind takes an exception object, destroys the current stack frame and passes the exception object to the system's exception dispatch code.
+ */
+public final class Unwind extends BlockEnd {
+
+    private static final int INPUT_COUNT = 1;
+    private static final int INPUT_EXCEPTION = 0;
+
+    private static final int SUCCESSOR_COUNT = 0;
+
+    @Override
+    protected int inputCount() {
+        return super.inputCount() + INPUT_COUNT;
+    }
+
+    @Override
+    protected int successorCount() {
+        return super.successorCount() + SUCCESSOR_COUNT;
+    }
+
+    /**
+     * The instruction that produces the exception object.
+     */
+     public Value exception() {
+        return (Value) inputs().get(super.inputCount() + INPUT_EXCEPTION);
+    }
+
+    public Value setException(Value n) {
+        assert n == null || n.kind == CiKind.Object;
+        return (Value) inputs().set(super.inputCount() + INPUT_EXCEPTION, n);
+    }
+
+    public Unwind(Value exception, boolean isSafepoint, Graph graph) {
+        super(CiKind.Object, null, isSafepoint, 0, INPUT_COUNT, SUCCESSOR_COUNT, graph);
+        setException(exception);
+    }
+
+    @Override
+    public void accept(ValueVisitor v) {
+        v.visitUnwind(this);
+    }
+
+    @Override
+    public void print(LogStream out) {
+        out.print(kind.typeChar).print("unwind ").print(exception());
+    }
+}