1 /*
   2  * Copyright (c) 2015, 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 8134321
  27  * @summary Code that capture field values of eliminated allocation at a safepoint when there's an arraycopy behind a Phi is broken
  28  *
  29  * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
  30  *                   compiler.arraycopy.TestEliminatedArrayCopyPhi
  31  */
  32 
  33 package compiler.arraycopy;
  34 
  35 public class TestEliminatedArrayCopyPhi {
  36 
  37     static int[] escaped;
  38 
  39     static void test(int[] src, boolean flag1, boolean flag2) {
  40         int[] array = new int[10];
  41         if (flag1) {
  42             System.arraycopy(src, 0, array, 0, src.length);
  43         } else {
  44         }
  45 
  46         if (flag2) {
  47             // never taken
  48             escaped = array;
  49         }
  50     }
  51 
  52     public static void main(String[] args) {
  53         int[] src = new int[10];
  54         for (int i = 0; i < 20000; i++) {
  55             test(src, (i % 2) == 0, false);
  56         }
  57     }
  58 }