| /* |
| * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.core.test.ea; |
| |
| import java.util.List; |
| |
| import org.junit.Test; |
| |
| import org.graalvm.compiler.core.test.GraalCompilerTest; |
| import org.graalvm.compiler.nodes.ProxyNode; |
| import org.graalvm.compiler.nodes.ReturnNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.ValuePhiNode; |
| import org.graalvm.compiler.nodes.java.LoadFieldNode; |
| import org.graalvm.compiler.nodes.java.StoreFieldNode; |
| import org.graalvm.compiler.nodes.memory.ReadNode; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.common.LoweringPhase; |
| import org.graalvm.compiler.phases.common.inlining.InliningPhase; |
| import org.graalvm.compiler.phases.tiers.HighTierContext; |
| import org.graalvm.compiler.virtual.phases.ea.EarlyReadEliminationPhase; |
| |
| public class EarlyReadEliminationTest extends GraalCompilerTest { |
| |
| public static Object staticField; |
| |
| public static class TestObject { |
| |
| public int x; |
| public int y; |
| |
| public TestObject(int x, int y) { |
| this.x = x; |
| this.y = y; |
| } |
| } |
| |
| public static class TestObject2 { |
| |
| public Object x; |
| public Object y; |
| |
| public TestObject2(Object x, Object y) { |
| this.x = x; |
| this.y = y; |
| } |
| } |
| |
| public static class TestObject3 extends TestObject { |
| |
| public int z; |
| |
| public TestObject3(int x, int y, int z) { |
| super(x, y); |
| this.z = z; |
| } |
| } |
| |
| @SuppressWarnings("all") |
| public static int testSimpleSnippet(TestObject a) { |
| a.x = 2; |
| staticField = a; |
| return a.x; |
| } |
| |
| @Test |
| public void testSimple() { |
| // Test without lowering. |
| ValueNode result = getReturn("testSimpleSnippet", false).result(); |
| assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); |
| assertTrue(result.isConstant()); |
| assertDeepEquals(2, result.asJavaConstant().asInt()); |
| |
| // Test with lowering. |
| result = getReturn("testSimpleSnippet", true).result(); |
| assertTrue(result.graph().getNodes().filter(ReadNode.class).isEmpty()); |
| assertTrue(result.isConstant()); |
| assertDeepEquals(2, result.asJavaConstant().asInt()); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testSimpleConflictSnippet(TestObject a, TestObject b) { |
| a.x = 2; |
| b.x = 3; |
| staticField = a; |
| return a.x; |
| } |
| |
| @Test |
| public void testSimpleConflict() { |
| ValueNode result = getReturn("testSimpleConflictSnippet", false).result(); |
| assertFalse(result.isConstant()); |
| assertTrue(result instanceof LoadFieldNode); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testParamSnippet(TestObject a, int b) { |
| a.x = b; |
| return a.x; |
| } |
| |
| @Test |
| public void testParam() { |
| ValueNode result = getReturn("testParamSnippet", false).result(); |
| assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); |
| assertDeepEquals(result.graph().getParameter(1), result); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testMaterializedSnippet(int a) { |
| TestObject obj = new TestObject(a, 0); |
| staticField = obj; |
| return obj.x; |
| } |
| |
| @Test |
| public void testMaterialized() { |
| ValueNode result = getReturn("testMaterializedSnippet", false).result(); |
| assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); |
| assertDeepEquals(result.graph().getParameter(0), result); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testSimpleLoopSnippet(TestObject obj, int a, int b) { |
| obj.x = a; |
| for (int i = 0; i < 10; i++) { |
| staticField = obj; |
| } |
| return obj.x; |
| } |
| |
| @Test |
| public void testSimpleLoop() { |
| // Test without lowering. |
| ValueNode result = getReturn("testSimpleLoopSnippet", false).result(); |
| assertTrue(result.graph().getNodes().filter(LoadFieldNode.class).isEmpty()); |
| assertDeepEquals(result.graph().getParameter(1), result); |
| |
| // Now test with lowering. |
| result = getReturn("testSimpleLoopSnippet", true).result(); |
| assertTrue(result.graph().getNodes().filter(ReadNode.class).isEmpty()); |
| assertDeepEquals(result.graph().getParameter(1), result); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testBadLoopSnippet(TestObject obj, TestObject obj2, int a, int b) { |
| obj.x = a; |
| for (int i = 0; i < 10; i++) { |
| staticField = obj; |
| obj2.x = 10; |
| obj.x = 0; |
| } |
| return obj.x; |
| } |
| |
| @Test |
| public void testBadLoop() { |
| ValueNode result = getReturn("testBadLoopSnippet", false).result(); |
| assertDeepEquals(0, result.graph().getNodes().filter(LoadFieldNode.class).count()); |
| assertTrue(result instanceof ProxyNode); |
| assertTrue(((ProxyNode) result).value() instanceof ValuePhiNode); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testBadLoop2Snippet(TestObject obj, TestObject obj2, int a, int b) { |
| obj.x = a; |
| for (int i = 0; i < 10; i++) { |
| obj.x = 0; |
| obj2.x = 10; |
| } |
| return obj.x; |
| } |
| |
| @Test |
| public void testBadLoop2() { |
| ValueNode result = getReturn("testBadLoop2Snippet", false).result(); |
| assertDeepEquals(1, result.graph().getNodes().filter(LoadFieldNode.class).count()); |
| assertTrue(result instanceof LoadFieldNode); |
| } |
| |
| @SuppressWarnings("all") |
| public static int testPhiSnippet(TestObject a, int b) { |
| if (b < 0) { |
| a.x = 1; |
| } else { |
| a.x = 2; |
| } |
| return a.x; |
| } |
| |
| @Test |
| public void testPhi() { |
| StructuredGraph graph = processMethod("testPhiSnippet", false); |
| assertTrue(graph.getNodes().filter(LoadFieldNode.class).isEmpty()); |
| List<ReturnNode> returnNodes = graph.getNodes(ReturnNode.TYPE).snapshot(); |
| assertDeepEquals(2, returnNodes.size()); |
| assertTrue(returnNodes.get(0).predecessor() instanceof StoreFieldNode); |
| assertTrue(returnNodes.get(1).predecessor() instanceof StoreFieldNode); |
| assertTrue(returnNodes.get(0).result().isConstant()); |
| assertTrue(returnNodes.get(1).result().isConstant()); |
| } |
| |
| @SuppressWarnings("all") |
| public static void testSimpleStoreSnippet(TestObject a, int b) { |
| a.x = b; |
| a.x = b; |
| } |
| |
| @Test |
| public void testSimpleStore() { |
| StructuredGraph graph = processMethod("testSimpleStoreSnippet", false); |
| assertDeepEquals(1, graph.getNodes().filter(StoreFieldNode.class).count()); |
| } |
| |
| public static int testValueProxySnippet(boolean b, TestObject o) { |
| int sum = 0; |
| if (b) { |
| sum += o.x; |
| } else { |
| TestObject3 p = (TestObject3) o; |
| sum += p.x; |
| } |
| sum += o.x; |
| return sum; |
| } |
| |
| @Test |
| public void testValueProxy() { |
| StructuredGraph graph = processMethod("testValueProxySnippet", false); |
| assertDeepEquals(2, graph.getNodes().filter(LoadFieldNode.class).count()); |
| } |
| |
| ReturnNode getReturn(String snippet, boolean doLowering) { |
| StructuredGraph graph = processMethod(snippet, doLowering); |
| assertDeepEquals(1, graph.getNodes(ReturnNode.TYPE).count()); |
| return graph.getNodes(ReturnNode.TYPE).first(); |
| } |
| |
| protected StructuredGraph processMethod(String snippet, boolean doLowering) { |
| StructuredGraph graph = parseEager(getResolvedJavaMethod(snippet), AllowAssumptions.NO); |
| HighTierContext context = getDefaultHighTierContext(); |
| new InliningPhase(new CanonicalizerPhase()).apply(graph, context); |
| if (doLowering) { |
| new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); |
| } |
| new EarlyReadEliminationPhase(new CanonicalizerPhase()).apply(graph, context); |
| return graph; |
| } |
| } |