001/*
002 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.jtt.optimize;
024
025import java.io.*;
026
027import org.junit.*;
028
029import com.oracle.graal.jtt.*;
030
031/*
032 */
033public class NCE_FlowSensitive05 extends JTTTest {
034
035    private static PrintStream ps = new PrintStream(new ByteArrayOutputStream());
036
037    public static String test(Object arg) {
038
039        // An artificial loop to trigger iterative NCE.
040        while (arg != null) {
041            ps.println(arg);
042        }
043
044        // The upcast must still include the null check.
045        return (String) arg;
046    }
047
048    @Test
049    public void run0() throws Throwable {
050        runTest("test", (Object) null);
051    }
052
053}