001/*
002 * Copyright (c) 2015, 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 org.junit.*;
026
027/**
028 * Collection of tests for
029 * {@link com.oracle.graal.phases.common.DominatorConditionalEliminationPhase} including those that
030 * triggered bugs in this phase.
031 */
032public class ConditionalEliminationTest6 extends ConditionalEliminationTestBase {
033
034    public static final A constA = new A();
035    public static final B constB = new B();
036
037    static class A {
038    }
039
040    static class B {
041    }
042
043    @SuppressWarnings("all")
044    public static B reference1Snippet(Object a, B b) {
045        if (a == constA) {
046            return b;
047        }
048        return null;
049    }
050
051    @SuppressWarnings("all")
052    public static B test1Snippet(Object a, B b) {
053        if (a == constA) {
054            if (a == null) {
055                return null;
056            } else {
057                return b;
058            }
059        }
060        return null;
061    }
062
063    @Test
064    public void test1() {
065        testConditionalElimination("test1Snippet", "reference1Snippet");
066    }
067
068    @SuppressWarnings("all")
069    public static B test2Snippet(Object a, B b) {
070        if (a == constA) {
071            if (a == constB) {
072                return null;
073            } else {
074                return b;
075            }
076        }
077        return null;
078    }
079
080    @Test
081    public void test2() {
082        testConditionalElimination("test2Snippet", "reference1Snippet");
083    }
084
085    @SuppressWarnings("all")
086    public static B test3Snippet(Object a, B b) {
087        if (a == constA) {
088            if (a == b) {
089                return null;
090            } else {
091                return b;
092            }
093        }
094        return null;
095    }
096
097    @Test
098    public void test3() {
099        testConditionalElimination("test3Snippet", "reference1Snippet");
100    }
101}