1 /*
2  * Copyright (c) 2013, 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 8007294
27  * @bug 8146999
28  * @summary ReduceFieldZeroing doesn't check for dependent load and can lead to incorrect execution
29  *
30  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+AlwaysIncrementalInline
31  *      -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
32  *      compiler.c2.Test8007294
33  */
34 
35 package compiler.c2;
36 
37 public class Test8007294 {
38 
39     int i1;
40     int i2;
41 
Test8007294(int i1, int i2)42     Test8007294(int i1, int i2) {
43         this.i1 = i1;
44         this.i2 = i2;
45     }
46 
m(int v)47     static int m(int v) {
48         return v;
49     }
50 
test1()51     static Test8007294 test1() {
52         Test8007294 obj = new Test8007294(10, 100);
53         int v1 = obj.i1;
54 
55         int v3 = m(v1);
56         int v2 = obj.i2;
57         obj.i2 = v3;
58         obj.i1 = v2;
59 
60         return obj;
61     }
62 
test2(int i)63     static int test2(int i) {
64         int j = 0;
65         if (i > 0) {
66             j = 1;
67         }
68 
69         int[] arr = new int[10];
70         arr[0] = 1;
71         arr[1] = 2;
72         int v1 = arr[j];
73         arr[0] = 3;
74         arr[1] = 4;
75 
76         return v1;
77     }
78 
main(String[] args)79     static public void main(String[] args) {
80         boolean failed = false;
81         for (int i = 0; i < 20000; i++) {
82             Test8007294 obj = test1();
83             if (obj.i1 != 100 || obj.i2 != 10) {
84                 System.out.println("FAILED test1 obj.i1 = " + obj.i1 +", obj.i2 = " + obj.i2);
85                 failed = true;
86                 break;
87             }
88         }
89         for (int i = 0; i < 20000; i++) {
90             test2(0);  // pollute profile
91             int res = test2(1);
92             if (res != 2) {
93                 System.out.println("FAILED test2 = " + res);
94                 failed = true;
95                 break;
96             }
97         }
98         if (failed) {
99             System.exit(97);
100         } else {
101             System.out.println("PASSED");
102         }
103     }
104 }
105