1 /* 2 * Copyright (c) 2011, 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 */ 23 package org.graalvm.compiler.core.test.ea; 24 25 import java.util.List; 26 27 import org.junit.Test; 28 29 import org.graalvm.compiler.core.test.GraalCompilerTest; 30 import org.graalvm.compiler.nodes.ProxyNode; 31 import org.graalvm.compiler.nodes.ReturnNode; 32 import org.graalvm.compiler.nodes.StructuredGraph; 33 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 34 import org.graalvm.compiler.nodes.ValueNode; 35 import org.graalvm.compiler.nodes.ValuePhiNode; 36 import org.graalvm.compiler.nodes.java.LoadFieldNode; 37 import org.graalvm.compiler.nodes.java.StoreFieldNode; 38 import org.graalvm.compiler.nodes.memory.ReadNode; 39 import org.graalvm.compiler.nodes.spi.LoweringTool; 40 import org.graalvm.compiler.phases.common.CanonicalizerPhase; 41 import org.graalvm.compiler.phases.common.LoweringPhase; 42 import org.graalvm.compiler.phases.common.inlining.InliningPhase; 43 import org.graalvm.compiler.phases.tiers.HighTierContext; 44 import org.graalvm.compiler.virtual.phases.ea.EarlyReadEliminationPhase; 45 46 public class EarlyReadEliminationTest extends GraalCompilerTest { 47 48 public static Object staticField; 49 50 public static class TestObject { 51 52 public int x; 53 public int y; 54 55 public TestObject(int x, int y) { 56 this.x = x; 57 this.y = y; 58 } 59 } 60 61 public static class TestObject2 { 62 63 public Object x; 64 public Object y; 65 66 public TestObject2(Object x, Object y) { 67 this.x = x; 68 this.y = y; 69 } 70 } 71 72 public static class TestObject3 extends TestObject { 73 74 public int z; 75 76 public TestObject3(int x, int y, int z) { 77 super(x, y); 78 this.z = z; 79 } 80 } 81 82 @SuppressWarnings("all") 83 public static int testSimpleSnippet(TestObject a) { 84 a.x = 2; 85 staticField = a; 86 return a.x; 87 } 88 89 @Test 90 public void testSimple() { 91 // Test without lowering. 92 ValueNode result = getReturn("testSimpleSnippet", false).result(); 93 assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); 94 assertTrue(result.isConstant()); 95 assertDeepEquals(2, result.asJavaConstant().asInt()); 96 97 // Test with lowering. 98 result = getReturn("testSimpleSnippet", true).result(); 99 assertTrue(result.graph().getNodes().filter(ReadNode.class).isEmpty()); 100 assertTrue(result.isConstant()); 101 assertDeepEquals(2, result.asJavaConstant().asInt()); 102 } 103 104 @SuppressWarnings("all") 105 public static int testSimpleConflictSnippet(TestObject a, TestObject b) { 106 a.x = 2; 107 b.x = 3; 108 staticField = a; 109 return a.x; 110 } 111 112 @Test 113 public void testSimpleConflict() { 114 ValueNode result = getReturn("testSimpleConflictSnippet", false).result(); 115 assertFalse(result.isConstant()); 116 assertTrue(result instanceof LoadFieldNode); 117 } 118 119 @SuppressWarnings("all") 120 public static int testParamSnippet(TestObject a, int b) { 121 a.x = b; 122 return a.x; 123 } 124 125 @Test 126 public void testParam() { 127 ValueNode result = getReturn("testParamSnippet", false).result(); 128 assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); 129 assertDeepEquals(result.graph().getParameter(1), result); 130 } 131 132 @SuppressWarnings("all") 133 public static int testMaterializedSnippet(int a) { 134 TestObject obj = new TestObject(a, 0); 135 staticField = obj; 136 return obj.x; 137 } 138 139 @Test 140 public void testMaterialized() { 141 ValueNode result = getReturn("testMaterializedSnippet", false).result(); 142 assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); 143 assertDeepEquals(result.graph().getParameter(0), result); 144 } 145 146 @SuppressWarnings("all") 147 public static int testSimpleLoopSnippet(TestObject obj, int a, int b) { 148 obj.x = a; 149 for (int i = 0; i < 10; i++) { 150 staticField = obj; 151 } 152 return obj.x; 153 } 154 155 @Test 156 public void testSimpleLoop() { 157 // Test without lowering. 158 ValueNode result = getReturn("testSimpleLoopSnippet", false).result(); 159 assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); 160 assertDeepEquals(result.graph().getParameter(1), result); 161 162 // Now test with lowering. 163 result = getReturn("testSimpleLoopSnippet", true).result(); 164 assertTrue(result.graph().getNodes().filter(ReadNode.class).isEmpty()); 165 assertDeepEquals(result.graph().getParameter(1), result); 166 } 167 168 @SuppressWarnings("all") 169 public static int testBadLoopSnippet(TestObject obj, TestObject obj2, int a, int b) { 170 obj.x = a; 171 for (int i = 0; i < 10; i++) { 172 staticField = obj; 173 obj2.x = 10; 174 obj.x = 0; 175 } 176 return obj.x; 177 } 178 179 @Test 180 public void testBadLoop() { 181 ValueNode result = getReturn("testBadLoopSnippet", false).result(); 182 assertDeepEquals(0, result.graph().getNodes().filter(LoadFieldNode.class).count()); 183 assertTrue(result instanceof ProxyNode); 184 assertTrue(((ProxyNode) result).value() instanceof ValuePhiNode); 185 } 186 187 @SuppressWarnings("all") 188 public static int testBadLoop2Snippet(TestObject obj, TestObject obj2, int a, int b) { 189 obj.x = a; 190 for (int i = 0; i < 10; i++) { 191 obj.x = 0; 192 obj2.x = 10; 193 } 194 return obj.x; 195 } 196 197 @Test 198 public void testBadLoop2() { 199 ValueNode result = getReturn("testBadLoop2Snippet", false).result(); 200 assertDeepEquals(1, result.graph().getNodes().filter(LoadFieldNode.class).count()); 201 assertTrue(result instanceof LoadFieldNode); 202 } 203 204 @SuppressWarnings("all") 205 public static int testPhiSnippet(TestObject a, int b) { 206 if (b < 0) { 207 a.x = 1; 208 } else { 209 a.x = 2; 210 } 211 return a.x; 212 } 213 214 @Test 215 public void testPhi() { 216 StructuredGraph graph = processMethod("testPhiSnippet", false); 217 assertTrue(graph.getNodes().filter(LoadFieldNode.class).isEmpty()); 218 List<ReturnNode> returnNodes = graph.getNodes(ReturnNode.TYPE).snapshot(); 219 assertDeepEquals(2, returnNodes.size()); 220 assertTrue(returnNodes.get(0).predecessor() instanceof StoreFieldNode); 221 assertTrue(returnNodes.get(1).predecessor() instanceof StoreFieldNode); 222 assertTrue(returnNodes.get(0).result().isConstant()); 223 assertTrue(returnNodes.get(1).result().isConstant()); 224 } 225 226 @SuppressWarnings("all") 227 public static void testSimpleStoreSnippet(TestObject a, int b) { 228 a.x = b; 229 a.x = b; 230 } 231 232 @Test 233 public void testSimpleStore() { 234 StructuredGraph graph = processMethod("testSimpleStoreSnippet", false); 235 assertDeepEquals(1, graph.getNodes().filter(StoreFieldNode.class).count()); 236 } 237 238 public static int testValueProxySnippet(boolean b, TestObject o) { 239 int sum = 0; 240 if (b) { 241 sum += o.x; 242 } else { 243 TestObject3 p = (TestObject3) o; 244 sum += p.x; 245 } 246 sum += o.x; 247 return sum; 248 } 249 250 @Test 251 public void testValueProxy() { 252 StructuredGraph graph = processMethod("testValueProxySnippet", false); 253 assertDeepEquals(2, graph.getNodes().filter(LoadFieldNode.class).count()); 254 } 255 256 ReturnNode getReturn(String snippet, boolean doLowering) { 257 StructuredGraph graph = processMethod(snippet, doLowering); 258 assertDeepEquals(1, graph.getNodes(ReturnNode.TYPE).count()); 259 return graph.getNodes(ReturnNode.TYPE).first(); 260 } 261 262 protected StructuredGraph processMethod(String snippet, boolean doLowering) { 263 StructuredGraph graph = parseEager(getResolvedJavaMethod(snippet), AllowAssumptions.NO); 264 HighTierContext context = getDefaultHighTierContext(); 265 new InliningPhase(new CanonicalizerPhase()).apply(graph, context); 266 if (doLowering) { 267 new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); 268 } 269 new EarlyReadEliminationPhase(new CanonicalizerPhase()).apply(graph, context); 270 return graph; 271 } 272 }