1 /*
   2  * Copyright (c) 2011, 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 java.util.EnumSet;
  26 
  27 import jdk.vm.ci.meta.DeoptimizationReason;
  28 
  29 import org.junit.Test;
  30 
  31 import org.graalvm.compiler.jtt.JTTTest;
  32 import org.graalvm.compiler.phases.OptimisticOptimizations;
  33 import org.graalvm.compiler.phases.OptimisticOptimizations.Optimization;
  34 import org.graalvm.compiler.phases.tiers.HighTierContext;
  35 
  36 public class ConditionalElimination02 extends JTTTest {
  37 
  38     private static Object o = null;
  39 
  40     private static class A {
  41 
  42         A(int y) {
  43             this.y = y;
  44         }
  45 
  46         int y;
  47     }
  48 
  49     public int test(A a, boolean isNull, boolean isVeryNull) {
  50         if (o == null) {
  51             if (!isNull) {
  52                 if (o == null) {
  53                     return a.y;
  54                 }
  55             }
  56             if (!isVeryNull) {
  57                 if (o == null) {
  58                     return a.y;
  59                 }
  60             }
  61         }
  62         return -1;
  63     }
  64 
  65     /**
  66      * These tests assume all code paths are reachable so disable profile based dead code removal.
  67      */
  68     @Override
  69     protected HighTierContext getDefaultHighTierContext() {
  70         return new HighTierContext(getProviders(), getDefaultGraphBuilderSuite(), OptimisticOptimizations.ALL.remove(Optimization.RemoveNeverExecutedCode));
  71     }
  72 
  73     @Test
  74     public void run0() throws Throwable {
  75         runTest(EnumSet.of(DeoptimizationReason.NullCheckException), "test", new A(5), false, false);
  76     }
  77 
  78     @Test
  79     public void run1() throws Throwable {
  80         runTest(EnumSet.of(DeoptimizationReason.NullCheckException), "test", new Object[]{null, true, true});
  81     }
  82 
  83 }