/*

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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package org.graalvm.compiler.core.test;

import org.graalvm.compiler.debug.DebugContext;

import org.graalvm.compiler.nodes.FrameState;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;

import org.graalvm.compiler.nodes.util.GraphUtil;

import org.graalvm.compiler.phases.common.CanonicalizerPhase;

import org.junit.Test;

public class PushThroughIfTest extends GraalCompilerTest {

    public int field1;

    public int field2;

    public int testSnippet(boolean b) {

        int i;

        if (b) {

            i = field1;

        } else {

            i = field1;

        }

        return i + field2;

    }

    @SuppressWarnings("unused")

    public int referenceSnippet(boolean b) {

        return field1 + field2;

    }

    @Test

    public void test1() {

        test("testSnippet", "referenceSnippet");

    }

    private void test(String snippet, String reference) {

        StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);

        DebugContext debug = graph.getDebug();

        debug.dump(DebugContext.BASIC_LEVEL, graph, "Graph");

        for (FrameState fs : graph.getNodes(FrameState.TYPE).snapshot()) {

            fs.replaceAtUsages(null);

            GraphUtil.killWithUnusedFloatingInputs(fs);

        }

        new CanonicalizerPhase().apply(graph, getProviders());

        new CanonicalizerPhase().apply(graph, getProviders());

        StructuredGraph referenceGraph = parseEager(reference, AllowAssumptions.YES);

        for (FrameState fs : referenceGraph.getNodes(FrameState.TYPE).snapshot()) {

            fs.replaceAtUsages(null);

            GraphUtil.killWithUnusedFloatingInputs(fs);

        }

        new CanonicalizerPhase().apply(referenceGraph, getProviders());

        assertEquals(referenceGraph, graph);

    }

}