/*

 * Copyright (c) 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package org.graalvm.compiler.api.directives.test;

import org.graalvm.compiler.api.directives.GraalDirectives;

import org.graalvm.compiler.core.test.GraalCompilerTest;

import org.graalvm.compiler.graph.iterators.NodeIterable;

import org.graalvm.compiler.nodes.IfNode;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.junit.Assert;

import org.junit.Test;

public class ConstantProbablityBranchFoldingTest extends GraalCompilerTest {

    public static int branchFoldingSnippet1() {

        if (GraalDirectives.injectBranchProbability(0.5, true)) {

            return 1;

        } else {

            return 2;

        }

    }

    public static int branchFoldingSnippet2() {

        if (GraalDirectives.injectBranchProbability(0.5, false)) {

            return 1;

        } else {

            return 2;

        }

    }

    @Test

    public void testEarlyFolding1() {

        test("branchFoldingSnippet1");

    }

    @Test

    public void testEarlyFolding2() {

        test("branchFoldingSnippet2");

    }

    @Override

    protected void checkLowTierGraph(StructuredGraph graph) {

        NodeIterable<IfNode> ifNodes = graph.getNodes(IfNode.TYPE);

        Assert.assertEquals("IfNode count", 0, ifNodes.count());

    }

}