| /* |
| * Copyright (c) 2013, 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.replacements.nodes; |
| |
| import java.util.Collections; |
| |
| import org.graalvm.compiler.core.common.type.ObjectStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.core.common.type.StampPair; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.CallTargetNode.InvokeKind; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.java.LoadFieldNode; |
| import org.graalvm.compiler.nodes.java.MonitorIdNode; |
| import org.graalvm.compiler.nodes.spi.ArrayLengthProvider; |
| import org.graalvm.compiler.nodes.spi.VirtualizableAllocation; |
| import org.graalvm.compiler.nodes.spi.VirtualizerTool; |
| import org.graalvm.compiler.nodes.util.GraphUtil; |
| import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode; |
| import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; |
| |
| import jdk.vm.ci.meta.Assumptions; |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| @NodeInfo |
| public abstract class BasicObjectCloneNode extends MacroStateSplitNode implements VirtualizableAllocation, ArrayLengthProvider { |
| |
| public static final NodeClass<BasicObjectCloneNode> TYPE = NodeClass.create(BasicObjectCloneNode.class); |
| |
| public BasicObjectCloneNode(NodeClass<? extends MacroNode> c, InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, StampPair returnStamp, ValueNode... arguments) { |
| super(c, invokeKind, targetMethod, bci, returnStamp, arguments); |
| updateStamp(computeStamp(getObject())); |
| } |
| |
| @Override |
| public boolean inferStamp() { |
| return updateStamp(computeStamp(getObject())); |
| } |
| |
| private static Stamp computeStamp(ValueNode object) { |
| Stamp objectStamp = object.stamp(); |
| if (objectStamp instanceof ObjectStamp) { |
| objectStamp = objectStamp.join(StampFactory.objectNonNull()); |
| } |
| return objectStamp; |
| } |
| |
| public ValueNode getObject() { |
| return arguments.get(0); |
| } |
| |
| /* |
| * Looks at the given stamp and determines if it is an exact type (or can be assumed to be an |
| * exact type) and if it is a cloneable type. |
| * |
| * If yes, then the exact type is returned, otherwise it returns null. |
| */ |
| protected static ResolvedJavaType getConcreteType(Stamp stamp) { |
| if (!(stamp instanceof ObjectStamp)) { |
| return null; |
| } |
| ObjectStamp objectStamp = (ObjectStamp) stamp; |
| if (objectStamp.type() == null) { |
| return null; |
| } else if (objectStamp.isExactType()) { |
| return objectStamp.type().isCloneableWithAllocation() ? objectStamp.type() : null; |
| } |
| return null; |
| } |
| |
| protected LoadFieldNode genLoadFieldNode(Assumptions assumptions, ValueNode originalAlias, ResolvedJavaField field) { |
| return LoadFieldNode.create(assumptions, originalAlias, field); |
| } |
| |
| @Override |
| public void virtualize(VirtualizerTool tool) { |
| ValueNode originalAlias = tool.getAlias(getObject()); |
| if (originalAlias instanceof VirtualObjectNode) { |
| VirtualObjectNode originalVirtual = (VirtualObjectNode) originalAlias; |
| if (originalVirtual.type().isCloneableWithAllocation()) { |
| ValueNode[] newEntryState = new ValueNode[originalVirtual.entryCount()]; |
| for (int i = 0; i < newEntryState.length; i++) { |
| newEntryState[i] = tool.getEntry(originalVirtual, i); |
| } |
| VirtualObjectNode newVirtual = originalVirtual.duplicate(); |
| tool.createVirtualObject(newVirtual, newEntryState, Collections.<MonitorIdNode> emptyList(), false); |
| tool.replaceWithVirtual(newVirtual); |
| } |
| } else { |
| ResolvedJavaType type = getConcreteType(originalAlias.stamp()); |
| if (type != null && !type.isArray()) { |
| VirtualInstanceNode newVirtual = createVirtualInstanceNode(type, true); |
| ResolvedJavaField[] fields = newVirtual.getFields(); |
| |
| ValueNode[] state = new ValueNode[fields.length]; |
| final LoadFieldNode[] loads = new LoadFieldNode[fields.length]; |
| for (int i = 0; i < fields.length; i++) { |
| state[i] = loads[i] = genLoadFieldNode(graph().getAssumptions(), originalAlias, fields[i]); |
| tool.addNode(loads[i]); |
| } |
| tool.createVirtualObject(newVirtual, state, Collections.<MonitorIdNode> emptyList(), false); |
| tool.replaceWithVirtual(newVirtual); |
| } |
| } |
| } |
| |
| protected VirtualInstanceNode createVirtualInstanceNode(ResolvedJavaType type, boolean hasIdentity) { |
| return new VirtualInstanceNode(type, hasIdentity); |
| } |
| |
| @Override |
| public ValueNode length() { |
| return GraphUtil.arrayLength(getObject()); |
| } |
| } |