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 
  42     Test8007294(int i1, int i2) {
  43         this.i1 = i1;
  44         this.i2 = i2;
  45     }
  46 
  47     static int m(int v) {
  48         return v;
  49     }
  50 
  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 
  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 
  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 }