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 */
23package org.graalvm.compiler.hotspot.amd64.test;
24
25import static org.graalvm.compiler.core.common.GraalOptions.OptImplicitNullChecks;
26
27import org.graalvm.compiler.hotspot.test.HotSpotGraalCompilerTest;
28import org.graalvm.compiler.options.OptionValues;
29import org.junit.Assume;
30import org.junit.Test;
31
32import jdk.vm.ci.meta.ResolvedJavaMethod;
33
34/**
35 * Ensures that frame omission works in cases where it is expected to.
36 */
37public class CompressedNullCheckTest extends HotSpotGraalCompilerTest {
38
39    private static final class Container {
40        Integer i;
41    }
42
43    public static void testSnippet(Container c) {
44        c.i.intValue();
45    }
46
47    @SuppressWarnings("try")
48    private void testImplicit(Integer i) {
49        Assume.assumeTrue(runtime().getVMConfig().useCompressedOops);
50
51        Container c = new Container();
52        c.i = i;
53
54        ResolvedJavaMethod method = getResolvedJavaMethod("testSnippet");
55        Result expect = executeExpected(method, null, c);
56
57        // make sure we don't get a profile that removes the implicit null check
58        method.reprofile();
59
60        OptionValues options = new OptionValues(getInitialOptions(), OptImplicitNullChecks, true);
61        Result actual = executeActual(options, method, null, c);
62        assertEquals(expect, actual);
63    }
64
65    @SuppressWarnings("try")
66    private void testExplicit(Integer i) {
67        Assume.assumeTrue(runtime().getVMConfig().useCompressedOops);
68
69        Container c = new Container();
70        c.i = i;
71
72        test(new OptionValues(getInitialOptions(), OptImplicitNullChecks, false), "testSnippet", c);
73    }
74
75    @Test
76    public void implicit() {
77        testImplicit(new Integer(1));
78    }
79
80    @Test
81    public void implicitNull() {
82        testImplicit(null);
83    }
84
85    @Test
86    public void explicit() {
87        testExplicit(new Integer(1));
88    }
89
90    @Test
91    public void explicitNull() {
92        testExplicit(null);
93    }
94}
95