Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/virtual/VirtualObjectNode.java @ 9501:bef43373de39
coalesce allocations during escape analysis
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 29 Apr 2013 14:53:08 +0200 |
parents | fc972f34c1d5 |
children | 106f0a0acafa |
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/* * Copyright (c) 2011, 2012, 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 com.oracle.graal.nodes.virtual; import com.oracle.graal.api.meta.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; public abstract class VirtualObjectNode extends ValueNode implements LIRLowerable { public VirtualObjectNode() { super(StampFactory.virtual()); } /** * 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. */ public abstract int entryIndexForOffset(long constantOffset); /** * Returns the {@link Kind} of the entry at the given index. */ public abstract Kind 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 true; } /** * 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(ValueNode[] entries, int lockCount); @Override public void generate(LIRGeneratorTool gen) { // nothing to do... } }