1/*
2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.jtt.optimize;
24
25import java.io.ByteArrayOutputStream;
26import java.io.PrintStream;
27
28import org.junit.Test;
29
30import org.graalvm.compiler.jtt.JTTTest;
31
32/*
33 */
34public class NCE_FlowSensitive05 extends JTTTest {
35
36    private static PrintStream ps = new PrintStream(new ByteArrayOutputStream());
37
38    public static String test(Object arg) {
39
40        // An artificial loop to trigger iterative NCE.
41        while (arg != null) {
42            ps.println(arg);
43        }
44
45        // The upcast must still include the null check.
46        return (String) arg;
47    }
48
49    @Test
50    public void run0() throws Throwable {
51        runTest("test", (Object) null);
52    }
53
54}
55