HashCodeTest.java revision 12657:6ef01bd40ce2 
1/*
2 * Copyright (c) 2016, 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.core.test;
24
25import org.junit.Assert;
26import org.junit.Test;
27
28import org.graalvm.compiler.core.phases.HighTier;
29import org.graalvm.compiler.core.phases.MidTier;
30import org.graalvm.compiler.nodes.InvokeNode;
31import org.graalvm.compiler.nodes.StructuredGraph;
32import org.graalvm.compiler.nodes.extended.LoadHubNode;
33import org.graalvm.compiler.nodes.extended.LoadMethodNode;
34import org.graalvm.compiler.phases.OptimisticOptimizations;
35import org.graalvm.compiler.phases.tiers.MidTierContext;
36
37public class HashCodeTest extends GraalCompilerTest {
38
39    static class OverrideHashCode {
40        @Override
41        public int hashCode() {
42            return 42;
43        }
44    }
45
46    static final class DontOverrideHashCode {
47    }
48
49    public static final Object NonOverridingConstant = new Object();
50    public static final Object OverridingConstant = new OverrideHashCode();
51
52    private static void initialize(Class<?> c) {
53        try {
54            Class.forName(c.getName(), true, c.getClassLoader());
55        } catch (ClassNotFoundException e) {
56            throw new AssertionError(e);
57        }
58    }
59
60    public static final int hashCodeSnippet01(Object o) {
61        return o.hashCode();
62    }
63
64    public static final int systemIdentityHashCodeSnippet01(Object o) {
65        return System.identityHashCode(o);
66    }
67
68    public static final int hashCodeFoldSnippet01() {
69        return NonOverridingConstant.hashCode();
70    }
71
72    public static final int identityHashCodeFoldSnippet01() {
73        return System.identityHashCode(NonOverridingConstant);
74    }
75
76    public static final int hashCodeNoFoldOverridingSnippet01(Object o) {
77        return o.hashCode();
78    }
79
80    public static final int identityHashCodeFoldOverridingSnippet01() {
81        return System.identityHashCode(OverridingConstant);
82    }
83
84    public static final int dontOverrideHashCodeFinalClass(DontOverrideHashCode o) {
85        return o.hashCode();
86    }
87
88    @Test
89    public void test01() {
90        test("hashCodeSnippet01", new Object());
91    }
92
93    @Test
94    public void test02() {
95        test("systemIdentityHashCodeSnippet01", new Object());
96    }
97
98    @Test
99    public void test03() {
100        StructuredGraph g = buildGraphAfterMidTier("hashCodeFoldSnippet01");
101        Assert.assertEquals(0, g.getNodes().filter(InvokeNode.class).count());
102    }
103
104    @Test
105    public void test04() {
106        StructuredGraph g = buildGraphAfterMidTier("identityHashCodeFoldSnippet01");
107        Assert.assertEquals(0, g.getNodes().filter(InvokeNode.class).count());
108    }
109
110    @Test
111    public void test05() {
112        checkForGuardedIntrinsicPattern("hashCodeNoFoldOverridingSnippet01");
113
114        Object nullObject = null;
115        test("hashCodeNoFoldOverridingSnippet01", nullObject);
116        test("hashCodeNoFoldOverridingSnippet01", new Object());
117        test("hashCodeNoFoldOverridingSnippet01", new DontOverrideHashCode());
118    }
119
120    @Test
121    public void test06() {
122        StructuredGraph g = buildGraphAfterMidTier("identityHashCodeFoldOverridingSnippet01");
123        Assert.assertEquals(0, g.getNodes().filter(InvokeNode.class).count());
124    }
125
126    @Test
127    public void test07() {
128        initialize(DontOverrideHashCode.class);
129        StructuredGraph g = buildGraphAfterMidTier("dontOverrideHashCodeFinalClass");
130        Assert.assertEquals(0, g.getNodes().filter(InvokeNode.class).count());
131    }
132
133    public static final int hashCodeInterface(Appendable o) {
134        return o.hashCode();
135    }
136
137    @Test
138    public void test08() {
139        initialize(Appendable.class);
140        checkForGuardedIntrinsicPattern("hashCodeInterface");
141        checkForGuardedIntrinsicPattern("hashCodeSnippet01");
142    }
143
144    private void checkForGuardedIntrinsicPattern(String name) {
145        StructuredGraph g = parseForCompile(getResolvedJavaMethod(name));
146        Assert.assertEquals(1, g.getNodes().filter(InvokeNode.class).count());
147        Assert.assertEquals(1, g.getNodes().filter(LoadHubNode.class).count());
148        Assert.assertEquals(1, g.getNodes().filter(LoadMethodNode.class).count());
149    }
150
151    @SuppressWarnings("try")
152    private StructuredGraph buildGraphAfterMidTier(String name) {
153        StructuredGraph g = parseForCompile(getResolvedJavaMethod(name));
154        new HighTier().apply(g, getDefaultHighTierContext());
155        new MidTier().apply(g, new MidTierContext(getProviders(), getTargetProvider(), OptimisticOptimizations.ALL, g.getProfilingInfo()));
156        return g;
157    }
158
159}
160