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 */ 23 package org.graalvm.compiler.jtt.optimize; 24 25 import java.io.ByteArrayOutputStream; 26 import java.io.PrintStream; 27 28 import org.junit.Test; 29 30 import org.graalvm.compiler.jtt.JTTTest; 31 32 /* 33 */ 34 public 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 }