/*

 * Copyright (c) 2017, 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.core.common.CompilationIdentifier;

import org.graalvm.compiler.core.common.GraalOptions;

import org.graalvm.compiler.java.BytecodeParserOptions;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.options.OptionValues;

import org.junit.Assert;

import org.junit.Test;

import jdk.vm.ci.meta.ResolvedJavaMethod;

/**

 * Tests that the defaults for {@link GraalOptions#TrivialInliningSize} and

 * {@link BytecodeParserOptions#InlineDuringParsingMaxDepth} prevent explosive graph growth for code

 * with small recursive methods.

 */

public class TrivialInliningExplosionTest extends GraalCompilerTest {

    public static void trivial() {

        trivial();

        trivial();

        trivial();

    }

    public static void main() {

        trivial();

        trivial();

        trivial();

        trivial();

        trivial();

        trivial();

        trivial();

        trivial();

        trivial();

    }

    private int afterParseSize;

    @Override

    protected StructuredGraph parseForCompile(ResolvedJavaMethod method, CompilationIdentifier compilationId, OptionValues options) {

        final StructuredGraph graph = super.parseForCompile(method, compilationId, options);

        this.afterParseSize = graph.getNodeCount();

        return graph;

    }

    @Test

    public void test() {

        ResolvedJavaMethod methodm0 = getResolvedJavaMethod("trivial");

        Assert.assertTrue(methodm0.getCodeSize() <= GraalOptions.TrivialInliningSize.getValue(getInitialOptions()));

        test("main");

        int afterCompileSize = lastCompiledGraph.getNodeCount();

        // The values of afterParseSize and afterCompileSize when this

        // test was written were 849 and 848 respectively.

        Assert.assertTrue(afterParseSize < 2000);

        Assert.assertTrue(afterCompileSize < 2000);

    }

}