1 /*
   2  * Copyright (c) 2011, 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 java.io.Serializable;
  28 import java.util.ArrayList;
  29 import java.util.List;
  30 
  31 import org.junit.Test;
  32 
  33 public class IfReorderTest extends GraalCompilerTest {
  34 
  35     private static Object fieldA = Integer.class;
  36     private static Object fieldB = Double.class;
  37 
  38     @Test
  39     public void test1() {
  40         test("test1Snippet", new ArrayList<>());
  41     }
  42 
  43     public static Object test1Snippet(Object o) {
  44         /*
  45          * Serializable and List are not mutually exclusive, so these two IFs should never be
  46          * reordered.
  47          */
  48         if (branchProbability(0.1, o instanceof Serializable)) {
  49             return fieldA;
  50         }
  51         if (branchProbability(0.9, o instanceof List)) {
  52             return fieldB;
  53         }
  54         return null;
  55     }
  56 
  57 }