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 package org.graalvm.compiler.hotspot.amd64.test; 24 25 import org.junit.Assert; 26 import org.junit.Assume; 27 import org.junit.Test; 28 29 import org.graalvm.compiler.core.common.GraalOptions; 30 import org.graalvm.compiler.hotspot.nodes.CompressionNode; 31 import org.graalvm.compiler.hotspot.test.HotSpotGraalCompilerTest; 32 import org.graalvm.compiler.nodes.StructuredGraph; 33 import org.graalvm.compiler.nodes.ValueNode; 34 import org.graalvm.compiler.nodes.calc.IsNullNode; 35 import org.graalvm.compiler.options.OptionValue; 36 import org.graalvm.compiler.options.OptionValue.OverrideScope; 37 38 import jdk.vm.ci.meta.ResolvedJavaMethod; 39 40 /** 41 * Ensures that frame omission works in cases where it is expected to. 42 */ 43 public class CompressedNullCheckTest extends HotSpotGraalCompilerTest { 44 45 private static final class Container { 46 Integer i; 47 } 48 49 public static void testSnippet(Container c) { 50 c.i.intValue(); 51 } 52 53 @SuppressWarnings("try") 54 private void testImplicit(Integer i) { 55 Assume.assumeTrue(runtime().getVMConfig().useCompressedOops); 56 57 Container c = new Container(); 58 c.i = i; 59 60 try (OverrideScope s = OptionValue.override(GraalOptions.OptImplicitNullChecks, true)) { 61 ResolvedJavaMethod method = getResolvedJavaMethod("testSnippet"); 62 Result expect = executeExpected(method, null, c); 63 64 // make sure we don't get a profile that removes the implicit null check 65 method.reprofile(); 66 67 Result actual = executeActual(method, null, c); 68 assertEquals(expect, actual); 69 } 70 } 71 72 @SuppressWarnings("try") 73 private void testExplicit(Integer i) { 74 Assume.assumeTrue(runtime().getVMConfig().useCompressedOops); 75 76 Container c = new Container(); 77 c.i = i; 78 79 try (OverrideScope s = OptionValue.override(GraalOptions.OptImplicitNullChecks, false)) { 80 test("testSnippet", c); 81 } 82 } 83 84 @Test 85 public void implicit() { 86 testImplicit(new Integer(1)); 87 } 88 89 @Test 90 public void implicitNull() { 91 testImplicit(null); 92 } 93 94 @Test 95 public void explicit() { 96 testExplicit(new Integer(1)); 97 } 98 99 @Test 100 public void explicitNull() { 101 testExplicit(null); 102 } 103 104 @Override 105 protected boolean checkMidTierGraph(StructuredGraph graph) { 106 int count = 0; 107 for (IsNullNode isNull : graph.getNodes().filter(IsNullNode.class).snapshot()) { 108 ValueNode value = isNull.getValue(); 109 if (value instanceof CompressionNode) { 110 count++; 111 isNull.replaceFirstInput(value, ((CompressionNode) value).getValue()); 112 } 113 } 114 Assert.assertEquals("graph should contain exactly one IsNullNode", 1, count); 115 return super.checkMidTierGraph(graph); 116 } 117 }