/*

 * 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package org.graalvm.compiler.core.test;

import org.graalvm.compiler.nodes.StructuredGraph;

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

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

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

import org.graalvm.compiler.phases.tiers.HighTierContext;

import org.junit.Test;

public class ConditionalEliminationMulTest extends GraalCompilerTest {

    public static void snippet01(int a) {

        if (a == 3) {

            if (a * 11 != 33) {

                shouldBeOptimizedAway();

            }

        }

    }

    public static void snippet02(int a) {

        if (a == 0) {

            if (a * 11 != 0) {

                shouldBeOptimizedAway();

            }

        }

    }

    public static void snippet03(int a) {

        if (a * 0 == 6) {

            shouldBeOptimizedAway();

        }

    }

    @Test

    public void testConditionalEliminated01() {

        assertOptimized("snippet01");

    }

    @Test

    public void testConditionalEliminated02() {

        assertOptimized("snippet02");

    }

    @Test

    public void testConditionalEliminated03() {

        assertOptimized("snippet03");

    }

    private void assertOptimized(String snippet) {

        assertOptimizedAway(prepareGraph(snippet));

    }

    private StructuredGraph prepareGraph(String snippet) {

        StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);

        HighTierContext context = getDefaultHighTierContext();

        new ConditionalEliminationPhase(false).apply(graph, context);

        c.apply(graph, context);

        new ConditionalEliminationPhase(false).apply(graph, context);

        c.apply(graph, context);

        return graph;

    }

}