--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/deopt/SynchronizedMethodDeoptimizationTest.java 2016-12-07 13:48:40.308284385 -0800 @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.core.test.deopt; + +import org.junit.Test; + +import org.graalvm.compiler.core.test.GraalCompilerTest; +import org.graalvm.compiler.core.test.ea.EATestBase.TestClassObject; + +/** + * In the following tests, we try to deoptimize out of synchronized methods. + */ +public class SynchronizedMethodDeoptimizationTest extends GraalCompilerTest { + + public static final TestClassObject testObject = null; + + public static synchronized Object testMethodSynchronized(Object o) { + if (o == null) { + // this branch will always deoptimize + return testObject.x; + } + return o; + } + + @Test + public void test1() { + test("testMethodSynchronized", "test"); + test("testMethodSynchronized", (Object) null); + } +}