1 /*
   2  * Copyright (c) 2009, 2012, 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.jtt.optimize;
  24 
  25 import org.junit.Test;
  26 
  27 import org.graalvm.compiler.jtt.JTTTest;
  28 
  29 /*
  30  * Tests constant folding of integer operations.
  31  */
  32 public class VN_Field02 extends JTTTest {
  33 
  34     private static class TestClass {
  35         int field = 9;
  36     }
  37 
  38     private static boolean cond = true;
  39     static final TestClass object = new TestClass();
  40 
  41     public static int test(int arg) {
  42         if (arg == 0) {
  43             return test1();
  44         }
  45         if (arg == 1) {
  46             return test2();
  47         }
  48         if (arg == 2) {
  49             return test3();
  50         }
  51         return 0;
  52     }
  53 
  54     private static int test1() {
  55         TestClass a = object;
  56         int c = a.field;
  57         if (cond) {
  58             return c + a.field;
  59         }
  60         return 0;
  61     }
  62 
  63     private static int test2() {
  64         TestClass a = object;
  65         if (cond) {
  66             TestClass b = object;
  67             return a.field + b.field;
  68         }
  69         return 0;
  70     }
  71 
  72     @SuppressWarnings("all")
  73     private static int test3() {
  74         TestClass a = null;
  75         if (cond) {
  76             TestClass b = null;
  77             return a.field + b.field;
  78         }
  79         return 0;
  80     }
  81 
  82     @Test
  83     public void run0() throws Throwable {
  84         runTest("test", 0);
  85     }
  86 
  87     @Test
  88     public void run1() throws Throwable {
  89         runTest("test", 1);
  90     }
  91 
  92     @Test
  93     public void run2() throws Throwable {
  94         runTest("test", 2);
  95     }
  96 
  97 }