| /* |
| * Copyright (c) 2012, 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; |
| |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.InputType; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| |
| /** |
| * Base class for nodes that contain "virtual" state, like FrameState and VirtualObjectState. |
| * Subclasses of this class will be treated in a special way by the scheduler. |
| */ |
| @NodeInfo(allowedUsageTypes = {InputType.State}) |
| public abstract class VirtualState extends Node { |
| |
| protected VirtualState(NodeClass<? extends VirtualState> c) { |
| super(c); |
| } |
| |
| public static final NodeClass<VirtualState> TYPE = NodeClass.create(VirtualState.class); |
| |
| public abstract static class NodeClosure<T extends Node> { |
| |
| public abstract void apply(Node usage, T node); |
| } |
| |
| public interface VirtualClosure { |
| |
| void apply(VirtualState node); |
| } |
| |
| public abstract VirtualState duplicateWithVirtualState(); |
| |
| public abstract void applyToNonVirtual(NodeClosure<? super ValueNode> closure); |
| |
| /** |
| * Performs a <b>pre-order</b> iteration over all elements reachable from this state that are a |
| * subclass of {@link VirtualState}. |
| */ |
| public abstract void applyToVirtual(VirtualClosure closure); |
| |
| public abstract boolean isPartOfThisState(VirtualState state); |
| |
| @Override |
| public final StructuredGraph graph() { |
| return (StructuredGraph) super.graph(); |
| } |
| |
| } |