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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.graalvm.compiler.nodes.debug.instrumentation;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED;

import org.graalvm.compiler.core.common.type.StampFactory;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.InputType;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.AbstractStateSplit;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.LIRLowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

The InstrumentationBeginNode represents the boundary of the instrumentation. It also maintains the target of the instrumentation.
/** * The {@code InstrumentationBeginNode} represents the boundary of the instrumentation. It also * maintains the target of the instrumentation. */
@NodeInfo(cycles = CYCLES_IGNORED, size = SIZE_IGNORED) public final class InstrumentationBeginNode extends AbstractStateSplit implements LIRLowerable { public static final NodeClass<InstrumentationBeginNode> TYPE = NodeClass.create(InstrumentationBeginNode.class); @OptionalInput(value = InputType.Unchecked) protected ValueNode target; private final boolean anchored; public InstrumentationBeginNode(boolean anchored) { super(TYPE, StampFactory.forVoid()); this.anchored = anchored; this.target = null; } public boolean isAnchored() { return anchored; } public ValueNode getTarget() { return target; } public void setTarget(ValueNode target) { updateUsages(this.target, target); this.target = target; } @Override public void generate(NodeLIRBuilderTool generator) { // do nothing } }