001/*
002 * Copyright (c) 2014, 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.ea;
024
025import com.oracle.graal.debug.*;
026import com.oracle.graal.debug.Debug.*;
027
028import org.junit.*;
029
030import com.oracle.graal.compiler.test.*;
031import com.oracle.graal.graph.*;
032import com.oracle.graal.nodes.*;
033import com.oracle.graal.nodes.StructuredGraph.AllowAssumptions;
034import com.oracle.graal.nodes.java.*;
035import com.oracle.graal.nodes.spi.*;
036import com.oracle.graal.phases.common.*;
037import com.oracle.graal.phases.common.inlining.*;
038import com.oracle.graal.phases.tiers.*;
039
040/**
041 * Tests {@link AbstractNewObjectNode#simplify(com.oracle.graal.graph.spi.SimplifierTool)}.
042 *
043 */
044public class PoorMansEATest extends GraalCompilerTest {
045    public static class A {
046        public A obj;
047    }
048
049    public static A test1Snippet() {
050        A a = new A();
051        a.obj = a;
052        return null;
053    }
054
055    @Test
056    public void test1() {
057        test("test1Snippet");
058    }
059
060    private void test(final String snippet) {
061        try (Scope s = Debug.scope("PoorMansEATest", new DebugDumpScope(snippet))) {
062            StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
063            HighTierContext highTierContext = getDefaultHighTierContext();
064            new InliningPhase(new CanonicalizerPhase()).apply(graph, highTierContext);
065            PhaseContext context = new PhaseContext(getProviders());
066            new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
067
068            // remove framestates in order to trigger the simplification.
069            cleanup: for (FrameState fs : graph.getNodes(FrameState.TYPE).snapshot()) {
070                for (Node input : fs.inputs()) {
071                    if (input instanceof NewInstanceNode) {
072                        fs.replaceAtUsages(null);
073                        fs.safeDelete();
074                        continue cleanup;
075                    }
076                }
077            }
078            new CanonicalizerPhase().apply(graph, context);
079        } catch (Throwable e) {
080            throw Debug.handle(e);
081        }
082    }
083}