1 /*
   2  * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.nodes.calc;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_1;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
  27 
  28 import org.graalvm.compiler.core.common.type.ArithmeticOpTable;
  29 import org.graalvm.compiler.core.common.type.ArithmeticOpTable.UnaryOp.Not;
  30 import org.graalvm.compiler.core.common.type.Stamp;
  31 import org.graalvm.compiler.graph.NodeClass;
  32 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
  33 import org.graalvm.compiler.lir.gen.ArithmeticLIRGeneratorTool;
  34 import org.graalvm.compiler.nodeinfo.NodeInfo;
  35 import org.graalvm.compiler.nodes.ValueNode;
  36 import org.graalvm.compiler.nodes.spi.ArithmeticLIRLowerable;
  37 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  38 import org.graalvm.compiler.nodes.spi.StampInverter;
  39 
  40 /**
  41  * Binary negation of long or integer values.
  42  */
  43 @NodeInfo(cycles = CYCLES_1, size = SIZE_1)
  44 public final class NotNode extends UnaryArithmeticNode<Not> implements ArithmeticLIRLowerable, NarrowableArithmeticNode, StampInverter {
  45 
  46     public static final NodeClass<NotNode> TYPE = NodeClass.create(NotNode.class);
  47 
  48     public NotNode(ValueNode x) {
  49         super(TYPE, ArithmeticOpTable::getNot, x);
  50     }
  51 
  52     @Override
  53     public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {
  54         ValueNode ret = super.canonical(tool, forValue);
  55         if (ret != this) {
  56             return ret;
  57         }
  58         if (forValue instanceof NotNode) {
  59             return ((NotNode) forValue).getValue();
  60         }
  61         return this;
  62     }
  63 
  64     @Override
  65     public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) {
  66         nodeValueMap.setResult(this, gen.emitNot(nodeValueMap.operand(getValue())));
  67     }
  68 
  69     @Override
  70     public Stamp invertStamp(Stamp outStamp) {
  71         return getArithmeticOp().foldStamp(outStamp);
  72     }
  73 }