1 /*
2 * Copyright (c) 2011, 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 java.io.BufferedInputStream;
26 import java.io.ByteArrayInputStream;
27 import java.io.FileInputStream;
28 import java.io.IOException;
29 import java.io.InputStream;
30
31 import org.junit.Assert;
32 import org.junit.Ignore;
33 import org.junit.Test;
34
35 import org.graalvm.compiler.debug.Debug;
36 import org.graalvm.compiler.debug.TTY;
37 import org.graalvm.compiler.graph.Node;
38 import org.graalvm.compiler.nodeinfo.Verbosity;
39 import org.graalvm.compiler.nodes.AbstractMergeNode;
40 import org.graalvm.compiler.nodes.PhiNode;
41 import org.graalvm.compiler.nodes.StructuredGraph;
42 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
43 import org.graalvm.compiler.nodes.StructuredGraph.ScheduleResult;
44 import org.graalvm.compiler.nodes.cfg.Block;
45 import org.graalvm.compiler.nodes.java.InstanceOfNode;
46 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
47 import org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase;
48 import org.graalvm.compiler.phases.schedule.SchedulePhase;
49 import org.graalvm.compiler.phases.tiers.PhaseContext;
50
51 /**
52 * In the following tests, the scalar type system of the compiler should be complete enough to see
53 * the relation between the different conditions.
54 */
55 public class TypeSystemTest extends GraalCompilerTest {
56
57 @Test
58 public void test3() {
59 test("test3Snippet", "referenceSnippet3");
60 }
61
62 public static int referenceSnippet3(Object o) {
63 if (o == null) {
64 return 1;
65 } else {
66 return 2;
67 }
68 }
69
70 @SuppressWarnings("unused")
71 public static int test3Snippet(Object o) {
72 if (o == null) {
73 if (o != null) {
74 return 3;
75 } else {
76 return 1;
77 }
78 } else {
79 return 2;
80 }
81 }
82
83 @Test
84 public void test4() {
85 test("test4Snippet", "referenceSnippet3");
86 }
87
88 @SuppressWarnings("unused")
89 public static int test4Snippet(Object o) {
90 if (o == null) {
91 Object o2 = Integer.class;
92 if (o == o2) {
93 return 3;
94 } else {
95 return 1;
96 }
97 } else {
98 return 2;
99 }
100 }
101
102 @Test
103 @Ignore
104 public void test5() {
105 test("test5Snippet", "referenceSnippet5");
106 }
107
108 public static int referenceSnippet5(Object o, Object a) {
109 if (o == null) {
110 if (a == Integer.class) {
111 return 1;
112 }
113 } else {
114 if (a == Double.class) {
115 return 11;
116 }
117 }
118 if (a == Integer.class) {
119 return 3;
120 }
121 return 5;
122 }
123
124 @SuppressWarnings("unused")
125 public static int test5Snippet(Object o, Object a) {
126 if (o == null) {
127 if (a == Integer.class) {
128 if (a == null) {
129 return 10;
130 }
131 return 1;
132 }
133 } else {
134 if (a == Double.class) {
135 if (a != null) {
136 return 11;
137 }
138 return 2;
139 }
140 }
141 if (a == Integer.class) {
142 return 3;
143 }
144 return 5;
145 }
146
147 @Test
148 public void test6() {
149 testHelper("test6Snippet", InstanceOfNode.class);
150 }
151
152 public static int test6Snippet(int i) throws IOException {
153 Object o = null;
154
155 if (i == 5) {
156 o = new FileInputStream("asdf");
157 }
158 if (i < 10) {
159 o = new ByteArrayInputStream(new byte[]{1, 2, 3});
160 }
161 if (i > 0) {
162 o = new BufferedInputStream(null);
163 }
164
165 return ((InputStream) o).available();
166 }
167
168 @Test
169 public void test7() {
170 test("test7Snippet", "referenceSnippet7");
171 }
172
173 public static int test7Snippet(int x) {
174 return ((x & 0xff) << 10) == ((x & 0x1f) + 1) ? 0 : x;
175 }
176
177 public static int referenceSnippet7(int x) {
178 return x;
179 }
180
181 private void test(String snippet, String referenceSnippet) {
182 StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
183 Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "Graph");
184 /*
185 * When using FlowSensitiveReductionPhase instead of ConditionalEliminationPhase,
186 * tail-duplication gets activated thus resulting in a graph with more nodes than the
187 * reference graph.
188 */
189 new DominatorConditionalEliminationPhase(false).apply(graph, new PhaseContext(getProviders()));
190 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
191 // a second canonicalizer is needed to process nested MaterializeNodes
192 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
193 StructuredGraph referenceGraph = parseEager(referenceSnippet, AllowAssumptions.NO);
194 new DominatorConditionalEliminationPhase(false).apply(referenceGraph, new PhaseContext(getProviders()));
195 new CanonicalizerPhase().apply(referenceGraph, new PhaseContext(getProviders()));
196 new CanonicalizerPhase().apply(referenceGraph, new PhaseContext(getProviders()));
197 assertEquals(referenceGraph, graph);
198 }
199
200 @Override
201 protected void assertEquals(StructuredGraph expected, StructuredGraph graph) {
202 if (getNodeCountExcludingUnusedConstants(expected) != getNodeCountExcludingUnusedConstants(graph)) {
203 Debug.dump(Debug.BASIC_LOG_LEVEL, expected, "expected (node count)");
204 Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "graph (node count)");
205 Assert.fail("Graphs do not have the same number of nodes: " + expected.getNodeCount() + " vs. " + graph.getNodeCount());
206 }
207 }
208
209 public static void outputGraph(StructuredGraph graph, String message) {
210 TTY.println("========================= " + message);
211 SchedulePhase schedulePhase = new SchedulePhase();
212 schedulePhase.apply(graph);
213 ScheduleResult schedule = graph.getLastSchedule();
214 for (Block block : schedule.getCFG().getBlocks()) {
215 TTY.print("Block " + block + " ");
216 if (block == schedule.getCFG().getStartBlock()) {
217 TTY.print("* ");
218 }
219 TTY.print("-> ");
220 for (Block succ : block.getSuccessors()) {
221 TTY.print(succ + " ");
222 }
223 TTY.println();
224 for (Node node : schedule.getBlockToNodesMap().get(block)) {
225 outputNode(node);
226 }
227 }
228 }
229
230 private static void outputNode(Node node) {
231 TTY.print(" " + node + " (usage count: " + node.getUsageCount() + ") (inputs:");
232 for (Node input : node.inputs()) {
233 TTY.print(" " + input.toString(Verbosity.Id));
234 }
235 TTY.println(")");
236 if (node instanceof AbstractMergeNode) {
237 for (PhiNode phi : ((AbstractMergeNode) node).phis()) {
238 outputNode(phi);
239 }
240 }
241 }
242
243 private <T extends Node> void testHelper(String snippet, Class<T> clazz) {
244 StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
245 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
246 new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
247 Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "Graph " + snippet);
248 Assert.assertFalse("shouldn't have nodes of type " + clazz, graph.getNodes().filter(clazz).iterator().hasNext());
249 }
250 }