1 /*
   2  * Copyright (c) 2014, 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 8031695
  27  * @summary CHA ignores default methods during analysis leading to incorrect code generation
  28  *
  29  * @run main/othervm -Xbatch compiler.inlining.DefaultAndConcreteMethodsCHA
  30  */
  31 
  32 package compiler.inlining;
  33 
  34 public class DefaultAndConcreteMethodsCHA {
  35     interface I {
  36         default int m() { return 0; }
  37     }
  38 
  39     static class A implements I {}
  40 
  41     static class C extends A { }
  42     static class D extends A { public int m() { return 1; } }
  43 
  44     public static int test(A obj) {
  45         return obj.m();
  46     }
  47     public static void main(String[] args) {
  48         for (int i = 0; i < 10000; i++) {
  49             int idC = test(new C());
  50             if (idC != 0) {
  51                 throw new Error("C.m didn't invoke I.m: id "+idC);
  52             }
  53 
  54             int idD = test(new D());
  55             if (idD != 1) {
  56                 throw new Error("D.m didn't invoke D.m: id "+idD);
  57             }
  58         }
  59 
  60     }
  61 }