/*

 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.

 * 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.graph.Node;

import org.graalvm.compiler.nodes.IfNode;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.calc.AddNode;

import org.graalvm.compiler.nodes.calc.FloatEqualsNode;

import org.graalvm.compiler.nodes.calc.ReinterpretNode;

import org.junit.Assert;

import org.junit.Test;

/**

 * Tests that substitutions for {@link Double#doubleToLongBits(double)} and

 * {@link Float#floatToIntBits(float)} produce graphs such that multiple calls to these methods with

 * the same input are canonicalized.

 */

public class CanonicalizedConversionTest extends GraalCompilerTest {

    @Override

    protected void checkLowTierGraph(StructuredGraph graph) {

        int reinterpretCount = 0;

        int floatEqualsCount = 0;

        int addCount = 0;

        for (Node node : graph.getNodes()) {

            if (node instanceof ReinterpretNode) {

                reinterpretCount++;

            } else if (node instanceof FloatEqualsNode) {

                floatEqualsCount++;

            } else if (node instanceof IfNode) {

                Assert.fail("Unexpected node: " + node);

            } else if (node instanceof AddNode) {

                addCount++;

            }

        }

        Assert.assertEquals(1, reinterpretCount);

        Assert.assertEquals(1, floatEqualsCount);

        Assert.assertEquals(2, addCount);

    }

    @Test

    public void test4() {

        test("snippet4", 567.890F);

        test("snippet4", -567.890F);

        test("snippet4", Float.NaN);

    }

    public static int snippet4(float value) {

        return Float.floatToIntBits(value) + Float.floatToIntBits(value) + Float.floatToIntBits(value);

    }

    @Test

    public void test5() {

        test("snippet5", 567.890D);

        test("snippet5", -567.890D);

        test("snippet5", Double.NaN);

    }

    public static long snippet5(double value) {

        return Double.doubleToLongBits(value) + Double.doubleToLongBits(value) + Double.doubleToLongBits(value);

    }

}