1 /* 2 * Copyright (c) 2013, 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.hotspot.replacements; 24 25 import java.lang.reflect.Method; 26 27 import org.graalvm.compiler.core.common.type.AbstractPointerStamp; 28 import org.graalvm.compiler.core.common.type.Stamp; 29 import org.graalvm.compiler.core.common.type.StampPair; 30 import org.graalvm.compiler.debug.DebugContext; 31 import org.graalvm.compiler.graph.NodeClass; 32 import org.graalvm.compiler.nodeinfo.NodeInfo; 33 import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind; 34 import org.graalvm.compiler.nodes.ParameterNode; 35 import org.graalvm.compiler.nodes.ReturnNode; 36 import org.graalvm.compiler.nodes.StructuredGraph; 37 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; 38 import org.graalvm.compiler.nodes.ValueNode; 39 import org.graalvm.compiler.nodes.java.LoadFieldNode; 40 import org.graalvm.compiler.nodes.java.NewInstanceNode; 41 import org.graalvm.compiler.nodes.java.StoreFieldNode; 42 import org.graalvm.compiler.nodes.spi.ArrayLengthProvider; 43 import org.graalvm.compiler.nodes.spi.LoweringTool; 44 import org.graalvm.compiler.nodes.spi.Replacements; 45 import org.graalvm.compiler.nodes.spi.VirtualizableAllocation; 46 import org.graalvm.compiler.nodes.type.StampTool; 47 import org.graalvm.compiler.replacements.nodes.BasicObjectCloneNode; 48 49 import jdk.vm.ci.meta.Assumptions; 50 import jdk.vm.ci.meta.ResolvedJavaField; 51 import jdk.vm.ci.meta.ResolvedJavaMethod; 52 import jdk.vm.ci.meta.ResolvedJavaType; 53 54 @NodeInfo 55 public final class ObjectCloneNode extends BasicObjectCloneNode implements VirtualizableAllocation, ArrayLengthProvider { 56 57 public static final NodeClass<ObjectCloneNode> TYPE = NodeClass.create(ObjectCloneNode.class); 58 59 public ObjectCloneNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, StampPair returnStamp, ValueNode receiver) { 60 super(TYPE, invokeKind, targetMethod, bci, returnStamp, receiver); 61 } 62 63 @Override 64 protected Stamp computeStamp(ValueNode object) { 65 if (getConcreteType(object.stamp()) != null) { 66 return AbstractPointerStamp.pointerNonNull(object.stamp()); 67 } 68 /* 69 * If this call can't be intrinsified don't report a non-null stamp, otherwise the stamp 70 * would change when this is lowered back to an invoke and we might lose a null check. 71 */ 72 return AbstractPointerStamp.pointerMaybeNull(object.stamp()); 73 } 74 75 @Override 76 @SuppressWarnings("try") 77 protected StructuredGraph getLoweredSnippetGraph(LoweringTool tool) { 78 ResolvedJavaType type = StampTool.typeOrNull(getObject()); 79 if (type != null) { 80 if (type.isArray()) { 81 Method method = ObjectCloneSnippets.arrayCloneMethods.get(type.getComponentType().getJavaKind()); 82 if (method != null) { 83 final ResolvedJavaMethod snippetMethod = tool.getMetaAccess().lookupJavaMethod(method); 84 final Replacements replacements = tool.getReplacements(); 85 StructuredGraph snippetGraph = null; 86 DebugContext debug = getDebug(); 87 try (DebugContext.Scope s = debug.scope("ArrayCloneSnippet", snippetMethod)) { 88 snippetGraph = replacements.getSnippet(snippetMethod, null); 89 } catch (Throwable e) { 90 throw debug.handle(e); 91 } 92 93 assert snippetGraph != null : "ObjectCloneSnippets should be installed"; 94 assert getConcreteType(stamp()) != null; 95 return lowerReplacement((StructuredGraph) snippetGraph.copy(getDebug()), tool); 96 } 97 assert false : "unhandled array type " + type.getComponentType().getJavaKind(); 98 } else { 99 Assumptions assumptions = graph().getAssumptions(); 100 type = getConcreteType(getObject().stamp()); 101 if (type != null) { 102 StructuredGraph newGraph = new StructuredGraph.Builder(graph().getOptions(), graph().getDebug(), AllowAssumptions.ifNonNull(assumptions)).build(); 103 ParameterNode param = newGraph.addWithoutUnique(new ParameterNode(0, StampPair.createSingle(getObject().stamp()))); 104 NewInstanceNode newInstance = newGraph.add(new NewInstanceNode(type, true)); 105 newGraph.addAfterFixed(newGraph.start(), newInstance); 106 ReturnNode returnNode = newGraph.add(new ReturnNode(newInstance)); 107 newGraph.addAfterFixed(newInstance, returnNode); 108 109 for (ResolvedJavaField field : type.getInstanceFields(true)) { 110 LoadFieldNode load = newGraph.add(LoadFieldNode.create(newGraph.getAssumptions(), param, field)); 111 newGraph.addBeforeFixed(returnNode, load); 112 newGraph.addBeforeFixed(returnNode, newGraph.add(new StoreFieldNode(newInstance, field, load))); 113 } 114 assert getConcreteType(stamp()) != null; 115 return lowerReplacement(newGraph, tool); 116 } 117 } 118 } 119 assert getConcreteType(stamp()) == null; 120 return null; 121 } 122 }