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 */
23 package org.graalvm.compiler.core.test;
24
25 import org.junit.Assert;
26 import org.junit.Test;
27
28 import org.graalvm.compiler.core.phases.HighTier;
29 import org.graalvm.compiler.core.phases.MidTier;
30 import org.graalvm.compiler.nodes.InvokeNode;
31 import org.graalvm.compiler.nodes.StructuredGraph;
32 import org.graalvm.compiler.nodes.extended.LoadHubNode;
33 import org.graalvm.compiler.nodes.extended.LoadMethodNode;
34 import org.graalvm.compiler.phases.OptimisticOptimizations;
35 import org.graalvm.compiler.phases.tiers.MidTierContext;
36
37 public 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 }