| /* |
| * Copyright (c) 2011, 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 static org.graalvm.compiler.nodeinfo.InputType.Condition; |
| import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1; |
| |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.graph.Node.IndirectCanonicalization; |
| import org.graalvm.compiler.graph.NodeClass; |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| import org.graalvm.compiler.nodes.calc.FloatingNode; |
| |
| @NodeInfo(allowedUsageTypes = {Condition}, size = SIZE_1) |
| public abstract class LogicNode extends FloatingNode implements IndirectCanonicalization { |
| |
| public static final NodeClass<LogicNode> TYPE = NodeClass.create(LogicNode.class); |
| |
| public LogicNode(NodeClass<? extends LogicNode> c) { |
| super(c, StampFactory.forVoid()); |
| } |
| |
| public static LogicNode and(LogicNode a, LogicNode b, double shortCircuitProbability) { |
| return and(a, false, b, false, shortCircuitProbability); |
| } |
| |
| public static LogicNode and(LogicNode a, boolean negateA, LogicNode b, boolean negateB, double shortCircuitProbability) { |
| StructuredGraph graph = a.graph(); |
| ShortCircuitOrNode notAorNotB = graph.unique(new ShortCircuitOrNode(a, !negateA, b, !negateB, shortCircuitProbability)); |
| return graph.unique(new LogicNegationNode(notAorNotB)); |
| } |
| |
| public static LogicNode or(LogicNode a, LogicNode b, double shortCircuitProbability) { |
| return or(a, false, b, false, shortCircuitProbability); |
| } |
| |
| public static LogicNode or(LogicNode a, boolean negateA, LogicNode b, boolean negateB, double shortCircuitProbability) { |
| return a.graph().unique(new ShortCircuitOrNode(a, negateA, b, negateB, shortCircuitProbability)); |
| } |
| |
| public final boolean isTautology() { |
| if (this instanceof LogicConstantNode) { |
| LogicConstantNode logicConstantNode = (LogicConstantNode) this; |
| return logicConstantNode.getValue(); |
| } |
| |
| return false; |
| } |
| |
| public final boolean isContradiction() { |
| if (this instanceof LogicConstantNode) { |
| LogicConstantNode logicConstantNode = (LogicConstantNode) this; |
| return !logicConstantNode.getValue(); |
| } |
| |
| return false; |
| } |
| } |