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package org.graalvm.compiler.nodes;

import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.InputType;
import org.graalvm.compiler.nodeinfo.NodeInfo;

Base class for AbstractBeginNodes that are associated with a frame state. TODO (dnsimon) this not needed until AbstractBeginNode no longer implements StateSplit which is not possible until loop peeling works without requiring begin nodes to have frames states.
/** * Base class for {@link AbstractBeginNode}s that are associated with a frame state. * * TODO (dnsimon) this not needed until {@link AbstractBeginNode} no longer implements * {@link StateSplit} which is not possible until loop peeling works without requiring begin nodes * to have frames states. */
@NodeInfo public abstract class BeginStateSplitNode extends AbstractBeginNode implements StateSplit { public static final NodeClass<BeginStateSplitNode> TYPE = NodeClass.create(BeginStateSplitNode.class); @OptionalInput(InputType.State) protected FrameState stateAfter; protected BeginStateSplitNode(NodeClass<? extends BeginStateSplitNode> c) { super(c); } protected BeginStateSplitNode(NodeClass<? extends BeginStateSplitNode> c, Stamp stamp) { super(c, stamp); } @Override public FrameState stateAfter() { return stateAfter; } @Override public void setStateAfter(FrameState x) { assert x == null || x.isAlive() : "frame state must be in a graph"; updateUsages(stateAfter, x); stateAfter = x; }
A begin node has no side effect.
/** * A begin node has no side effect. */
@Override public boolean hasSideEffect() { return false; } }