001/*
002 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.compiler.test;
024
025import jdk.internal.jvmci.meta.Assumptions.*;
026
027import org.junit.*;
028
029import com.oracle.graal.nodes.*;
030
031/**
032 * Ensure that abstract classes with a single implementor are properly optimized and that loading a
033 * subclass below the leaf type triggers invalidation.
034 */
035public class ConcreteSubtypeTest extends GraalCompilerAssumptionsTest {
036    abstract static class AbstractBase {
037        abstract void check();
038    }
039
040    static class Subclass extends AbstractBase {
041        @Override
042        public void check() {
043            throw new InternalError();
044        }
045    }
046
047    static class SubSubclass extends Subclass {
048        @Override
049        public void check() {
050        }
051    }
052
053    public void callAbstractType(AbstractBase object) {
054        object.check();
055    }
056
057    @Override
058    protected void checkGraph(Assumption expectedAssumption, StructuredGraph graph) {
059        super.checkGraph(expectedAssumption, graph);
060        assertTrue(graph.isTrivial());
061    }
062
063    /**
064     * Test that {@link #callAbstractType} gets compiled into an empty method with a
065     * {@link ConcreteSubtype} assumption on {@link AbstractBase} and {@link Subclass}. Then ensures
066     * that loading and initialization of {@link SubSubclass} causes the compiled method to be
067     * invalidated.
068     */
069    @Test
070    public void testLeafAbstractType() {
071        testAssumptionInvalidate("callAbstractType", new ConcreteSubtype(resolveAndInitialize(AbstractBase.class), resolveAndInitialize(Subclass.class)), "SubSubclass");
072    }
073}