--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/GraalCompiler/src/com/sun/c1x/ir/LoopBegin.java	Fri May 27 17:48:28 2011 +0200
@@ -0,0 +1,60 @@
+/*
+ * 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.*;
+
+public class LoopBegin extends Merge {
+
+    private static final int INPUT_COUNT = 0;
+    private static final int SUCCESSOR_COUNT = 0;
+
+    public LoopBegin(Graph graph) {
+        super(INPUT_COUNT, SUCCESSOR_COUNT, graph);
+    }
+
+    public LoopEnd loopEnd() {
+        for (Node usage : usages()) {
+            if (usage instanceof LoopEnd) {
+                LoopEnd end = (LoopEnd) usage;
+                if (end.loopBegin() == this) {
+                    return end;
+                }
+            }
+        }
+        assert false : "Begin should always have a LoopEnd";
+        return null;
+    }
+
+    @Override
+    public void accept(ValueVisitor v) {
+        v.visitLoopBegin(this);
+    }
+
+    @Override
+    public void print(LogStream out) {
+        out.print("loopBegin");
+    }
+
+}