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 8073154
  27  * @build compiler.print.TestProfileReturnTypePrinting
  28  * @run main/othervm -XX:TypeProfileLevel=020
  29  *                   -XX:CompileCommand=compileonly,compiler.print.TestProfileReturnTypePrinting::testMethod
  30  *                   -XX:+IgnoreUnrecognizedVMOptions -XX:+PrintLIR
  31  *                   compiler.print.TestProfileReturnTypePrinting
  32  * @summary Verify that c1's LIR that contains ProfileType node could be dumped
  33  *          without a crash disregard to an exact class knowledge.
  34  */
  35 
  36 package compiler.print;
  37 
  38 public class TestProfileReturnTypePrinting {
  39     private static final int ITERATIONS = 1_000_000;
  40 
  41     public static void main(String args[]) {
  42         for (int i = 0; i < ITERATIONS; i++) {
  43             TestProfileReturnTypePrinting.testMethod(i);
  44         }
  45     }
  46 
  47     private static int testMethod(int i) {
  48         return TestProfileReturnTypePrinting.foo().hashCode()
  49                 + TestProfileReturnTypePrinting.bar(i).hashCode();
  50     }
  51 
  52     /* Exact class of returned value is known statically. */
  53     private static B foo() {
  54         return new B();
  55     }
  56 
  57     /* Exact class of returned value is not known statically. */
  58     private static Object bar(int i) {
  59         if (i % 2 == 0) {
  60             return new A();
  61         } else {
  62             return new B();
  63         }
  64     }
  65 
  66     private static class A {
  67     }
  68 
  69     private static class B extends A {
  70     }
  71 }