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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package org.graalvm.compiler.nodes;

import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.Position;
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.
/** * 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 abstract static class NodePositionClosure<T extends Node> { public abstract void apply(T from, Position p); } public interface VirtualClosure { void apply(VirtualState node); } public abstract VirtualState duplicateWithVirtualState(); public abstract void applyToNonVirtual(NodePositionClosure<? super Node> closure);
Performs a pre-order iteration over all elements reachable from this state that are a subclass of VirtualState.
/** * 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(); } }