1 /*
   2  * Copyright (c) 2014, 2015, 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.hotspot.amd64.test;
  26 
  27 import static org.graalvm.compiler.core.common.GraalOptions.OptImplicitNullChecks;
  28 
  29 import org.graalvm.compiler.hotspot.test.HotSpotGraalCompilerTest;
  30 import org.graalvm.compiler.options.OptionValues;
  31 import org.junit.Assume;
  32 import org.junit.Test;
  33 
  34 import jdk.vm.ci.meta.ResolvedJavaMethod;
  35 
  36 /**
  37  * Ensures that frame omission works in cases where it is expected to.
  38  */
  39 public class CompressedNullCheckTest extends HotSpotGraalCompilerTest {
  40 
  41     private static final class Container {
  42         Integer i;
  43     }
  44 
  45     public static void testSnippet(Container c) {
  46         c.i.intValue();
  47     }
  48 
  49     @SuppressWarnings("try")
  50     private void testImplicit(Integer i) {
  51         Assume.assumeTrue(runtime().getVMConfig().useCompressedOops);
  52 
  53         Container c = new Container();
  54         c.i = i;
  55 
  56         ResolvedJavaMethod method = getResolvedJavaMethod("testSnippet");
  57         Result expect = executeExpected(method, null, c);
  58 
  59         // make sure we don't get a profile that removes the implicit null check
  60         method.reprofile();
  61 
  62         OptionValues options = new OptionValues(getInitialOptions(), OptImplicitNullChecks, true);
  63         Result actual = executeActual(options, method, null, c);
  64         assertEquals(expect, actual);
  65     }
  66 
  67     @SuppressWarnings("try")
  68     private void testExplicit(Integer i) {
  69         Assume.assumeTrue(runtime().getVMConfig().useCompressedOops);
  70 
  71         Container c = new Container();
  72         c.i = i;
  73 
  74         test(new OptionValues(getInitialOptions(), OptImplicitNullChecks, false), "testSnippet", c);
  75     }
  76 
  77     @Test
  78     public void implicit() {
  79         testImplicit(Integer.valueOf(1));
  80     }
  81 
  82     @Test
  83     public void implicitNull() {
  84         testImplicit(null);
  85     }
  86 
  87     @Test
  88     public void explicit() {
  89         testExplicit(Integer.valueOf(1));
  90     }
  91 
  92     @Test
  93     public void explicitNull() {
  94         testExplicit(null);
  95     }
  96 }