1 /* 2 * Copyright (c) 2011, 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 24 /** 25 * @test 26 * @bug 7041100 27 * @summary The load in String.equals intrinsic executed before null check 28 * 29 * @run main/othervm -Xbatch compiler.c2.Test7041100 abc def 30 */ 31 32 package compiler.c2; 33 34 public class Test7041100 { 35 36 static String n = null; main(String[] args)37 public static void main(String[] args) throws Exception { 38 for (int i = 0; i < 10000; i++) { 39 stringEQ(args[0], args[1]); 40 stringEQ(args[0], args[0]); 41 stringEQ(args[0], n); 42 stringEQ(n, args[0]); 43 } 44 } 45 stringEQ(String a, String b)46 public static boolean stringEQ(String a, String b) { 47 if (a == b) 48 return true; 49 if (a == null || b == null) 50 return false; 51 else 52 return a.equals(b); 53 } 54 } 55