--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/WhileNode.java	Fri Dec 21 10:45:37 2012 -0800
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2012, 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 com.oracle.truffle.sl.nodes;
+
+import com.oracle.truffle.api.frame.*;
+
+public class WhileNode extends StatementNode {
+
+    @Child
+    private ConditionNode condition;
+    @Child
+    private StatementNode body;
+
+    private final BreakException breakTarget;
+    private final ContinueException continueTarget;
+
+    public WhileNode(ConditionNode condition, StatementNode body) {
+        this.condition = adoptChild(condition);
+        this.body = adoptChild(body);
+
+        this.breakTarget = new BreakException();
+        this.continueTarget = new ContinueException();
+    }
+
+    @Override
+    public void executeVoid(VirtualFrame frame) {
+        try {
+            while (condition.executeCondition(frame)) {
+                try {
+                    body.executeVoid(frame);
+                } catch (ContinueException ex) {
+                    if (ex != continueTarget) {
+                        throw ex;
+                    }
+                    // Fall through to next loop iteration.
+                }
+            }
+        } catch (BreakException ex) {
+            if (ex != breakTarget) {
+                throw ex;
+            }
+            // Done executing this loop, exit method to execute statement following the loop.
+        }
+    }
+}