1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  */

    23 package org.graalvm.compiler.core.test;

    24 

    25 import org.graalvm.compiler.core.common.CompilationIdentifier;

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

    27 import org.graalvm.compiler.java.BytecodeParserOptions;

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

    29 import org.graalvm.compiler.options.OptionValues;

    30 import org.junit.Assert;

    31 import org.junit.Test;

    32 

    33 import jdk.vm.ci.meta.ResolvedJavaMethod;

    34 

    35 /**

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

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

    38  * with small recursive methods.

    39  */

    40 public class TrivialInliningExplosionTest extends GraalCompilerTest {

    41 

    42     public static void trivial() {

    43         trivial();

    44         trivial();

    45         trivial();

    46     }

    47 

    48     public static void main() {

    49         trivial();

    50         trivial();

    51         trivial();

    52         trivial();

    53         trivial();

    54         trivial();

    55         trivial();

    56         trivial();

    57         trivial();

    58     }

    59 

    60     private int afterParseSize;

    61 

    62     @Override

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

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

    65         this.afterParseSize = graph.getNodeCount();

    66         return graph;

    67     }

    68 

    69     @Test

    70     public void test() {

    71         ResolvedJavaMethod methodm0 = getResolvedJavaMethod("trivial");

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

    73         test("main");

    74         int afterCompileSize = lastCompiledGraph.getNodeCount();

    75 

    76         // The values of afterParseSize and afterCompileSize when this

    77         // test was written were 849 and 848 respectively.

    78         Assert.assertTrue(afterParseSize < 2000);

    79         Assert.assertTrue(afterCompileSize < 2000);

    80 

    81     }

    82 }