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.phases.common.*;
032import com.oracle.graal.phases.tiers.*;
033
034public class MergeCanonicalizerTest extends GraalCompilerTest {
035
036    public static int staticField;
037
038    private int field;
039
040    @Test
041    public void testSplitReturn() {
042        test("testSplitReturnSnippet", 2);
043        testReturnCount("testSplitReturnSnippet", 2);
044    }
045
046    public int testSplitReturnSnippet(int b) {
047        int v;
048        if (b < 0) {
049            staticField = 1;
050            v = 10;
051        } else {
052            staticField = 2;
053            v = 20;
054        }
055        int i = field;
056        i = field + i;
057        return v;
058    }
059
060    private void testReturnCount(String snippet, int returnCount) {
061        StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
062        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
063        new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
064        Debug.dump(graph, "Graph");
065        assertDeepEquals(returnCount, graph.getNodes(ReturnNode.TYPE).count());
066    }
067}