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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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package org.graalvm.compiler.nodes;

import static org.graalvm.compiler.nodeinfo.InputType.Condition;
import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;

import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.spi.Canonicalizable;
import org.graalvm.compiler.graph.spi.CanonicalizerTool;
import org.graalvm.compiler.nodeinfo.NodeInfo;

import jdk.vm.ci.meta.TriState;

Logic node that negates its argument.
/** * Logic node that negates its argument. */
@NodeInfo(cycles = CYCLES_0, size = SIZE_0) public final class LogicNegationNode extends LogicNode implements Canonicalizable.Unary<LogicNode> { public static final NodeClass<LogicNegationNode> TYPE = NodeClass.create(LogicNegationNode.class); @Input(Condition) LogicNode value; public LogicNegationNode(LogicNode value) { super(TYPE); this.value = value; } public static LogicNode create(LogicNode value) { LogicNode synonym = findSynonym(value); if (synonym != null) { return synonym; } return new LogicNegationNode(value); } private static LogicNode findSynonym(LogicNode value) { if (value instanceof LogicConstantNode) { LogicConstantNode logicConstantNode = (LogicConstantNode) value; return LogicConstantNode.forBoolean(!logicConstantNode.getValue()); } else if (value instanceof LogicNegationNode) { return ((LogicNegationNode) value).getValue(); } return null; } @Override public LogicNode getValue() { return value; } @Override public LogicNode canonical(CanonicalizerTool tool, LogicNode forValue) { LogicNode synonym = findSynonym(forValue); if (synonym != null) { return synonym; } return this; } @Override public TriState implies(boolean thisNegated, LogicNode other) { if (other == getValue()) { return TriState.get(thisNegated); } return getValue().implies(!thisNegated, other); } }