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 org.graalvm.compiler.core.common.cfg.Loop;
26 import org.graalvm.compiler.debug.DebugContext;
27 import org.graalvm.compiler.graph.Node;
28 import org.graalvm.compiler.nodes.Invoke;
29 import org.graalvm.compiler.nodes.StructuredGraph;
30 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
31 import org.graalvm.compiler.nodes.cfg.Block;
32 import org.graalvm.compiler.nodes.cfg.ControlFlowGraph;
33 import org.graalvm.compiler.nodes.java.MethodCallTargetNode;
34 import org.junit.Assert;
35 import org.junit.Test;
36
37 public class NestedLoopTest extends GraalCompilerTest {
38
39 @Test
40 public void test1() {
41 test("test1Snippet", 1, 2, 2);
42 }
43
44 @Test
45 public void test2() {
46 test("test2Snippet", 1, 2, 2);
47 }
48
49 @Test
50 public void test3() {
51 test("test3Snippet", 1, 2, 2);
52 }
53
54 @Test
55 public void test4() {
56 test("test4Snippet", 1, 3, 2);
57 }
58
59 @SuppressWarnings("all")
60 public static void test1Snippet(int a) {
61 while (a()) { // a() exits root, while() exits root
62 m1: while (b()) { // b() exits nested & root, while() exits nested
63 while (c()) { // c() exits innermost & nested & root, while() exits innermost
64 if (d()) { // d() exits innermost & nested & root
65 break m1; // break exits innermost & nested
66 }
67 }
68 }
69 }
70 }// total : root = 5 exits, nested = 5, innermost = 4
71
72 @SuppressWarnings("all")
73 public static void test2Snippet(int a) {
74 while (a()) { // a() exits root, while() exits root
75 try {
76 m1: while (b()) { // b() exits nested, while() exits nested
77 while (c()) { // c() exits innermost & nested, while() exits innermost
78 if (d()) { // d() exits innermost & nested
79 break m1; // break exits innermost & nested
80 }
81 }
82 }
83 } catch (Throwable t) {
84 }
85 }
86 }// total : root = 2 exits, nested = 5, innermost = 4
87
88 @SuppressWarnings("all")
89 public static void test3Snippet(int a) {
90 while (a == 0) { // while() exits root
91 try {
92 m1: while (b()) { // b() exits nested, while() exits nested
93 while (c()) { // c() exits innermost & nested, while() exits innermost
94 if (d()) { // d() exits innermost & nested
95 a(); // a() exits nothing (already outside innermost & nested)
96 break m1; // break exits innermost & nested
97 }
98 }
99 }
100 } catch (Throwable t) {
101 }
102 }
103 }// total : root = 1 exit, nested = 5, innermost = 4
104
105 public static void test4Snippet(int a) {
106 while (a != 0) { // while() exits root
107 try {
108 m1: while (a != 0) { // while() exits nested
109 b(); // b() exits nested
110 while (c()) { // c() exits innermost & nested, while() exits innermost
111 if (d()) { // d() exits innermost & nested
112 break m1; // break exits innermost & nested
113 }
114 }
115 if (a != 2) {
116 a(); // a() exits nothing (already outside innermost & nested)
117 throw new Exception(); // throw exits nested
118 }
119 }
120 } catch (Throwable t) {
121 }
122 }
123 } // total : root = 1 exit, nested = 6, innermost = 4
124
125 private static native boolean a();
126
127 private static native boolean b();
128
129 private static native boolean c();
130
131 private static native boolean d();
132
133 private static Invoke getInvoke(String name, StructuredGraph graph) {
134 for (MethodCallTargetNode callTarget : graph.getNodes(MethodCallTargetNode.TYPE)) {
135 if (callTarget.targetMethod().getName().equals(name)) {
136 return callTarget.invoke();
137 }
138 }
139 return null;
140 }
141
142 private void test(String snippet, int rootExits, int nestedExits, int innerExits) {
143 StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
144 DebugContext debug = graph.getDebug();
145 debug.dump(DebugContext.BASIC_LEVEL, graph, "Graph");
146 ControlFlowGraph cfg = ControlFlowGraph.compute(graph, true, true, true, true);
147
148 Assert.assertEquals(3, cfg.getLoops().size());
149 Loop<Block> rootLoop = cfg.getLoops().get(0);
150 Loop<Block> nestedLoop = cfg.getLoops().get(1);
151 Loop<Block> innerMostLoop = cfg.getLoops().get(2);
152 Invoke a = getInvoke("a", graph);
153 Invoke b = getInvoke("b", graph);
154 Invoke c = getInvoke("c", graph);
155 Invoke d = getInvoke("d", graph);
156 Assert.assertTrue(containsDirect(rootLoop, a, cfg));
157 Assert.assertTrue(containsDirect(nestedLoop, b, cfg));
158 Assert.assertTrue(containsDirect(innerMostLoop, c, cfg));
159 Assert.assertTrue(containsDirect(innerMostLoop, d, cfg));
160 Assert.assertTrue(contains(rootLoop, d, cfg));
161 Assert.assertTrue(contains(nestedLoop, d, cfg));
162 Assert.assertEquals(rootExits, rootLoop.getExits().size());
163 Assert.assertEquals(nestedExits, nestedLoop.getExits().size());
164 Assert.assertEquals(innerExits, innerMostLoop.getExits().size());
165 debug.dump(DebugContext.BASIC_LEVEL, graph, "Graph");
166 }
167
168 private static boolean contains(Loop<Block> loop, Invoke node, ControlFlowGraph cfg) {
169 Block block = cfg.blockFor((Node) node);
170 Assert.assertNotNull(block);
171 return loop.getBlocks().contains(block);
172 }
173
174 private static boolean containsDirect(Loop<Block> loop, Invoke node, ControlFlowGraph cfg) {
175 for (Loop<Block> child : loop.getChildren()) {
176 if (contains(child, node, cfg)) {
177 return false;
178 }
179 }
180 return contains(loop, node, cfg);
181 }
182 }