001/*
002 * Copyright (c) 2011, 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 com.oracle.graal.debug.*;
026
027import org.junit.*;
028
029import com.oracle.graal.nodes.*;
030import com.oracle.graal.nodes.StructuredGraph.AllowAssumptions;
031import com.oracle.graal.nodes.util.*;
032import com.oracle.graal.phases.common.*;
033import com.oracle.graal.phases.tiers.*;
034
035public class PushThroughIfTest extends GraalCompilerTest {
036
037    public int field1;
038    public int field2;
039
040    public int testSnippet(boolean b) {
041        int i;
042        if (b) {
043            i = field1;
044        } else {
045            i = field1;
046        }
047        return i + field2;
048    }
049
050    @SuppressWarnings("unused")
051    public int referenceSnippet(boolean b) {
052        return field1 + field2;
053    }
054
055    @Test
056    public void test1() {
057        test("testSnippet", "referenceSnippet");
058    }
059
060    private void test(String snippet, String reference) {
061        StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
062        Debug.dump(graph, "Graph");
063        for (FrameState fs : graph.getNodes(FrameState.TYPE).snapshot()) {
064            fs.replaceAtUsages(null);
065            GraphUtil.killWithUnusedFloatingInputs(fs);
066        }
067        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
068        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
069
070        StructuredGraph referenceGraph = parseEager(reference, AllowAssumptions.YES);
071        for (FrameState fs : referenceGraph.getNodes(FrameState.TYPE).snapshot()) {
072            fs.replaceAtUsages(null);
073            GraphUtil.killWithUnusedFloatingInputs(fs);
074        }
075        new CanonicalizerPhase().apply(referenceGraph, new PhaseContext(getProviders()));
076        assertEquals(referenceGraph, graph);
077    }
078}