rev 52889 : 8214023: Update Graal

   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 
  24 
  25 package org.graalvm.compiler.core.test.ea;
  26 
  27 import java.util.List;
  28 
  29 import org.junit.Test;
  30 
  31 import org.graalvm.compiler.core.test.GraalCompilerTest;
  32 import org.graalvm.compiler.nodes.ProxyNode;
  33 import org.graalvm.compiler.nodes.ReturnNode;
  34 import org.graalvm.compiler.nodes.StructuredGraph;
  35 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
  36 import org.graalvm.compiler.nodes.ValueNode;
  37 import org.graalvm.compiler.nodes.ValuePhiNode;
  38 import org.graalvm.compiler.nodes.java.LoadFieldNode;
  39 import org.graalvm.compiler.nodes.java.StoreFieldNode;
  40 import org.graalvm.compiler.nodes.memory.ReadNode;
  41 import org.graalvm.compiler.nodes.spi.LoweringTool;
  42 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  43 import org.graalvm.compiler.phases.common.LoweringPhase;
  44 import org.graalvm.compiler.phases.common.inlining.InliningPhase;
  45 import org.graalvm.compiler.phases.tiers.HighTierContext;
  46 import org.graalvm.compiler.virtual.phases.ea.EarlyReadEliminationPhase;

  47 
  48 public class EarlyReadEliminationTest extends GraalCompilerTest {
  49 
  50     public static Object staticField;
  51 
  52     public static class TestObject {
  53 
  54         public int x;
  55         public int y;
  56 
  57         public TestObject(int x, int y) {
  58             this.x = x;
  59             this.y = y;
  60         }
  61     }
  62 
  63     public static class TestObject2 {
  64 
  65         public Object x;
  66         public Object y;
  67 
  68         public TestObject2(Object x, Object y) {
  69             this.x = x;
  70             this.y = y;
  71         }
  72     }
  73 
  74     public static class TestObject3 extends TestObject {
  75 
  76         public int z;
  77 
  78         public TestObject3(int x, int y, int z) {
  79             super(x, y);
  80             this.z = z;
  81         }
  82     }
  83 
  84     @SuppressWarnings("all")
  85     public static int testSimpleSnippet(TestObject a) {
  86         a.x = 2;
  87         staticField = a;
  88         return a.x;
  89     }
  90 
  91     @Test
  92     public void testSimple() {
  93         // Test without lowering.
  94         ValueNode result = getReturn("testSimpleSnippet", false).result();
  95         assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty());
  96         assertTrue(result.isConstant());
  97         assertDeepEquals(2, result.asJavaConstant().asInt());
  98 
  99         // Test with lowering.
 100         result = getReturn("testSimpleSnippet", true).result();
 101         assertTrue(result.graph().getNodes().filter(ReadNode.class).isEmpty());
 102         assertTrue(result.isConstant());
 103         assertDeepEquals(2, result.asJavaConstant().asInt());
 104     }
 105 
 106     @SuppressWarnings("all")
 107     public static int testSimpleConflictSnippet(TestObject a, TestObject b) {
 108         a.x = 2;
 109         b.x = 3;
 110         staticField = a;
 111         return a.x;
 112     }
 113 
 114     @Test
 115     public void testSimpleConflict() {
 116         ValueNode result = getReturn("testSimpleConflictSnippet", false).result();
 117         assertFalse(result.isConstant());
 118         assertTrue(result instanceof LoadFieldNode);
 119     }
 120 
 121     @SuppressWarnings("all")
 122     public static int testParamSnippet(TestObject a, int b) {
 123         a.x = b;
 124         return a.x;
 125     }
 126 
 127     @Test
 128     public void testParam() {
 129         ValueNode result = getReturn("testParamSnippet", false).result();
 130         assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty());
 131         assertDeepEquals(result.graph().getParameter(1), result);
 132     }
 133 
 134     @SuppressWarnings("all")
 135     public static int testMaterializedSnippet(int a) {
 136         TestObject obj = new TestObject(a, 0);
 137         staticField = obj;
 138         return obj.x;
 139     }
 140 
 141     @Test
 142     public void testMaterialized() {
 143         ValueNode result = getReturn("testMaterializedSnippet", false).result();
 144         assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty());
 145         assertDeepEquals(result.graph().getParameter(0), result);
 146     }
 147 
 148     @SuppressWarnings("all")
 149     public static int testSimpleLoopSnippet(TestObject obj, int a, int b) {
 150         obj.x = a;
 151         for (int i = 0; i < 10; i++) {
 152             staticField = obj;
 153         }
 154         return obj.x;
 155     }
 156 
 157     @Test
 158     public void testSimpleLoop() {
 159         // Test without lowering.
 160         ValueNode result = getReturn("testSimpleLoopSnippet", false).result();
 161         assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty());
 162         assertDeepEquals(result.graph().getParameter(1), result);
 163 
 164         // Now test with lowering.
 165         result = getReturn("testSimpleLoopSnippet", true).result();
 166         assertTrue(result.graph().getNodes().filter(ReadNode.class).isEmpty());
 167         assertDeepEquals(result.graph().getParameter(1), result);
 168     }
 169 
 170     @SuppressWarnings("all")
 171     public static int testBadLoopSnippet(TestObject obj, TestObject obj2, int a, int b) {
 172         obj.x = a;
 173         for (int i = 0; i < 10; i++) {
 174             staticField = obj;
 175             obj2.x = 10;
 176             obj.x = 0;
 177         }
 178         return obj.x;
 179     }
 180 
 181     @Test
 182     public void testBadLoop() {
 183         ValueNode result = getReturn("testBadLoopSnippet", false).result();
 184         assertDeepEquals(0, result.graph().getNodes().filter(LoadFieldNode.class).count());
 185         assertTrue(result instanceof ProxyNode);
 186         assertTrue(((ProxyNode) result).value() instanceof ValuePhiNode);
 187     }
 188 
 189     @SuppressWarnings("all")
 190     public static int testBadLoop2Snippet(TestObject obj, TestObject obj2, int a, int b) {
 191         obj.x = a;
 192         for (int i = 0; i < 10; i++) {
 193             obj.x = 0;
 194             obj2.x = 10;
 195         }
 196         return obj.x;
 197     }
 198 
 199     @Test
 200     public void testBadLoop2() {
 201         ValueNode result = getReturn("testBadLoop2Snippet", false).result();
 202         assertDeepEquals(1, result.graph().getNodes().filter(LoadFieldNode.class).count());
 203         assertTrue(result instanceof LoadFieldNode);
 204     }
 205 
 206     @SuppressWarnings("all")
 207     public static int testPhiSnippet(TestObject a, int b) {
 208         if (b < 0) {
 209             a.x = 1;
 210         } else {
 211             a.x = 2;
 212         }
 213         return a.x;
 214     }
 215 
 216     @Test
 217     public void testPhi() {
 218         StructuredGraph graph = processMethod("testPhiSnippet", false);
 219         assertTrue(graph.getNodes().filter(LoadFieldNode.class).isEmpty());
 220         List<ReturnNode> returnNodes = graph.getNodes(ReturnNode.TYPE).snapshot();
 221         assertDeepEquals(2, returnNodes.size());
 222         assertTrue(returnNodes.get(0).predecessor() instanceof StoreFieldNode);
 223         assertTrue(returnNodes.get(1).predecessor() instanceof StoreFieldNode);
 224         assertTrue(returnNodes.get(0).result().isConstant());
 225         assertTrue(returnNodes.get(1).result().isConstant());
 226     }
 227 
 228     @SuppressWarnings("all")
 229     public static void testSimpleStoreSnippet(TestObject a, int b) {
 230         a.x = b;
 231         a.x = b;
 232     }
 233 
 234     @Test
 235     public void testSimpleStore() {
 236         StructuredGraph graph = processMethod("testSimpleStoreSnippet", false);
 237         assertDeepEquals(1, graph.getNodes().filter(StoreFieldNode.class).count());
 238     }
 239 
 240     public static int testValueProxySnippet(boolean b, TestObject o) {
 241         int sum = 0;
 242         if (b) {
 243             sum += o.x;
 244         } else {
 245             TestObject3 p = (TestObject3) o;
 246             sum += p.x;
 247         }
 248         sum += o.x;
 249         return sum;
 250     }
 251 
 252     @Test
 253     public void testValueProxy() {
 254         StructuredGraph graph = processMethod("testValueProxySnippet", false);
 255         assertDeepEquals(2, graph.getNodes().filter(LoadFieldNode.class).count());
 256     }
 257 
 258     ReturnNode getReturn(String snippet, boolean doLowering) {
 259         StructuredGraph graph = processMethod(snippet, doLowering);
 260         assertDeepEquals(1, graph.getNodes(ReturnNode.TYPE).count());
 261         return graph.getNodes(ReturnNode.TYPE).first();
 262     }
 263 
 264     protected StructuredGraph processMethod(String snippet, boolean doLowering) {
 265         StructuredGraph graph = parseEager(getResolvedJavaMethod(snippet), AllowAssumptions.NO);
 266         HighTierContext context = getDefaultHighTierContext();
 267         new InliningPhase(new CanonicalizerPhase()).apply(graph, context);
 268         if (doLowering) {
 269             new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
 270         }
 271         new EarlyReadEliminationPhase(new CanonicalizerPhase()).apply(graph, context);
 272         return graph;
 273     }
 274 }
--- EOF ---