| /* |
| * 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.nodes.virtual; |
| |
| import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0; |
| |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.core.common.type.TypeReference; |
| import org.graalvm.compiler.graph.IterableNodeType; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.FixedNode; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.spi.LIRLowerable; |
| import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool; |
| |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| @NodeInfo(cycles = CYCLES_0, size = SIZE_0) |
| public abstract class VirtualObjectNode extends ValueNode implements LIRLowerable, IterableNodeType { |
| |
| public static final NodeClass<VirtualObjectNode> TYPE = NodeClass.create(VirtualObjectNode.class); |
| protected boolean hasIdentity; |
| private int objectId = -1; |
| |
| protected VirtualObjectNode(NodeClass<? extends VirtualObjectNode> c, ResolvedJavaType type, boolean hasIdentity) { |
| super(c, StampFactory.objectNonNull(TypeReference.createExactTrusted(type))); |
| this.hasIdentity = hasIdentity; |
| } |
| |
| public final int getObjectId() { |
| return objectId; |
| } |
| |
| public final void resetObjectId() { |
| this.objectId = -1; |
| } |
| |
| public final void setObjectId(int objectId) { |
| assert objectId != -1; |
| this.objectId = objectId; |
| } |
| |
| @Override |
| protected void afterClone(Node other) { |
| super.afterClone(other); |
| resetObjectId(); |
| } |
| |
| /** |
| * The type of object described by this {@link VirtualObjectNode}. In case of arrays, this is |
| * the array type (and not the component type). |
| */ |
| public abstract ResolvedJavaType type(); |
| |
| /** |
| * The number of entries this virtual object has. Either the number of fields or the number of |
| * array elements. |
| */ |
| public abstract int entryCount(); |
| |
| /** |
| * Returns the name of the entry at the given index. Only used for debugging purposes. |
| */ |
| public abstract String entryName(int i); |
| |
| /** |
| * If the given index denotes an entry in this virtual object, the index of this entry is |
| * returned. If no such entry can be found, this method returns -1. |
| * |
| * @param constantOffset offset, where the value is placed. |
| * @param expectedEntryKind Specifies which type is expected at this offset (Is important when |
| * doing implicit casts, especially on big endian systems. |
| */ |
| public abstract int entryIndexForOffset(long constantOffset, JavaKind expectedEntryKind); |
| |
| /** |
| * Returns the {@link JavaKind} of the entry at the given index. |
| */ |
| public abstract JavaKind entryKind(int index); |
| |
| /** |
| * Returns an exact duplicate of this virtual object node, which has not been added to the graph |
| * yet. |
| */ |
| public abstract VirtualObjectNode duplicate(); |
| |
| /** |
| * Specifies whether this virtual object has an object identity. If not, then the result of a |
| * comparison of two virtual objects is determined by comparing their contents. |
| */ |
| public boolean hasIdentity() { |
| return hasIdentity; |
| } |
| |
| public void setIdentity(boolean identity) { |
| this.hasIdentity = identity; |
| } |
| |
| /** |
| * Returns a node that can be used to materialize this virtual object. If this returns an |
| * {@link AllocatedObjectNode} then this node will be attached to a {@link CommitAllocationNode} |
| * , otherwise the node will just be added to the graph. |
| */ |
| public abstract ValueNode getMaterializedRepresentation(FixedNode fixed, ValueNode[] entries, LockState locks); |
| |
| @Override |
| public void generate(NodeLIRBuilderTool gen) { |
| // nothing to do... |
| } |
| } |