| /* |
| * Copyright (c) 2009, 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.nodes.java; |
| |
| import java.lang.ref.Reference; |
| import java.util.Collections; |
| |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.core.common.type.TypeReference; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.FrameState; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.spi.VirtualizableAllocation; |
| import org.graalvm.compiler.nodes.spi.VirtualizerTool; |
| import org.graalvm.compiler.nodes.virtual.VirtualInstanceNode; |
| |
| import jdk.vm.ci.meta.ResolvedJavaField; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * The {@code NewInstanceNode} represents the allocation of an instance class object. |
| */ |
| @NodeInfo(nameTemplate = "New {p#instanceClass/s}") |
| public class NewInstanceNode extends AbstractNewObjectNode implements VirtualizableAllocation { |
| |
| public static final NodeClass<NewInstanceNode> TYPE = NodeClass.create(NewInstanceNode.class); |
| protected final ResolvedJavaType instanceClass; |
| |
| public NewInstanceNode(ResolvedJavaType type, boolean fillContents) { |
| this(TYPE, type, fillContents, null); |
| } |
| |
| public NewInstanceNode(ResolvedJavaType type, boolean fillContents, FrameState stateBefore) { |
| this(TYPE, type, fillContents, stateBefore); |
| } |
| |
| protected NewInstanceNode(NodeClass<? extends NewInstanceNode> c, ResolvedJavaType type, boolean fillContents, FrameState stateBefore) { |
| super(c, StampFactory.objectNonNull(TypeReference.createExactTrusted(type)), fillContents, stateBefore); |
| assert !type.isArray() && !type.isInterface() && !type.isPrimitive(); |
| this.instanceClass = type; |
| } |
| |
| /** |
| * Gets the instance class being allocated by this node. |
| * |
| * @return the instance class allocated |
| */ |
| public ResolvedJavaType instanceClass() { |
| return instanceClass; |
| } |
| |
| @Override |
| public void virtualize(VirtualizerTool tool) { |
| /* |
| * Reference objects can escape into their ReferenceQueue at any safepoint, therefore |
| * they're excluded from escape analysis. |
| */ |
| if (!tool.getMetaAccessProvider().lookupJavaType(Reference.class).isAssignableFrom(instanceClass)) { |
| VirtualInstanceNode virtualObject = createVirtualInstanceNode(true); |
| ResolvedJavaField[] fields = virtualObject.getFields(); |
| ValueNode[] state = new ValueNode[fields.length]; |
| for (int i = 0; i < state.length; i++) { |
| state[i] = defaultFieldValue(fields[i]); |
| } |
| tool.createVirtualObject(virtualObject, state, Collections.<MonitorIdNode> emptyList(), false); |
| tool.replaceWithVirtual(virtualObject); |
| } |
| } |
| |
| protected VirtualInstanceNode createVirtualInstanceNode(boolean hasIdentity) { |
| return new VirtualInstanceNode(instanceClass(), hasIdentity); |
| } |
| |
| /* Factored out in a separate method so that subclasses can override it. */ |
| protected ConstantNode defaultFieldValue(ResolvedJavaField field) { |
| return ConstantNode.defaultForKind(field.getType().getJavaKind(), graph()); |
| } |
| } |