1 /*
   2  * Copyright (c) 2017, 2018, 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 
  24 
  25 package org.graalvm.compiler.core.test;
  26 
  27 import org.graalvm.compiler.core.common.CompilationIdentifier;
  28 import org.graalvm.compiler.core.common.GraalOptions;
  29 import org.graalvm.compiler.java.BytecodeParserOptions;
  30 import org.graalvm.compiler.nodes.StructuredGraph;
  31 import org.graalvm.compiler.options.OptionValues;
  32 import org.junit.Assert;
  33 import org.junit.Test;
  34 
  35 import jdk.vm.ci.meta.ResolvedJavaMethod;
  36 
  37 /**
  38  * Tests that the defaults for {@link GraalOptions#TrivialInliningSize} and
  39  * {@link BytecodeParserOptions#InlineDuringParsingMaxDepth} prevent explosive graph growth for code
  40  * with small recursive methods.
  41  */
  42 public class TrivialInliningExplosionTest extends GraalCompilerTest {
  43 
  44     public static void trivial() {
  45         trivial();
  46         trivial();
  47         trivial();
  48     }
  49 
  50     public static void main() {
  51         trivial();
  52         trivial();
  53         trivial();
  54         trivial();
  55         trivial();
  56         trivial();
  57         trivial();
  58         trivial();
  59         trivial();
  60     }
  61 
  62     private int afterParseSize;
  63 
  64     @Override
  65     protected StructuredGraph parseForCompile(ResolvedJavaMethod method, CompilationIdentifier compilationId, OptionValues options) {
  66         final StructuredGraph graph = super.parseForCompile(method, compilationId, options);
  67         this.afterParseSize = graph.getNodeCount();
  68         return graph;
  69     }
  70 
  71     @Test
  72     public void test() {
  73         ResolvedJavaMethod methodm0 = getResolvedJavaMethod("trivial");
  74         Assert.assertTrue(methodm0.getCodeSize() <= GraalOptions.TrivialInliningSize.getValue(getInitialOptions()));
  75         test("main");
  76         int afterCompileSize = lastCompiledGraph.getNodeCount();
  77 
  78         // The values of afterParseSize and afterCompileSize when this
  79         // test was written were 3223 and 3505 respectively.
  80         Assert.assertTrue(afterParseSize < 4000);
  81         Assert.assertTrue(afterCompileSize < 4000);
  82 
  83     }
  84 }