1 /*
   2  * Copyright (c) 2014, 2016, 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 8050079
  27  * @summary Compiles a monomorphic call to finalizeObject() on a modified java.lang.Object to test C1 CHA.
  28  *
  29  * @build java.base/java.lang.Object
  30  * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xcomp -XX:-VerifyDependencies
  31  *                   -XX:TieredStopAtLevel=1
  32  *                   -XX:CompileCommand=compileonly,compiler.dependencies.TestMonomorphicObjectCall::callFinalize
  33  *                   -XX:CompileCommand=compileonly,java.lang.Object::finalizeObject
  34  *                   compiler.dependencies.MonomorphicObjectCall.TestMonomorphicObjectCall
  35  */
  36 
  37 package compiler.dependencies.MonomorphicObjectCall;
  38 
  39 public class TestMonomorphicObjectCall {
  40 
  41     private static void callFinalize(Object object) throws Throwable {
  42         // Call modified version of java.lang.Object::finalize() that is
  43         // not overridden by any subclass. C1 CHA should mark the call site
  44         // as monomorphic and inline the method.
  45         object.finalizeObject();
  46     }
  47 
  48     public static void main(String[] args) throws Throwable {
  49         // Trigger compilation of 'callFinalize'
  50         callFinalize(new Object());
  51     }
  52 }