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