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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IntegerRemNode.java @ 21387:3bf051bb2691

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Remove final and abstract class restrictions
author Christian Wimmer <christian.wimmer@oracle.com>
date Thu, 14 May 2015 16:11:58 -0700
parents 8fc336a04d77
children 48c1ebd24120
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1 /*
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2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.nodes.calc;
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24
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25 import com.oracle.graal.api.code.*;
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26 import com.oracle.graal.compiler.common.type.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.graph.spi.*;
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29 import com.oracle.graal.nodeinfo.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.nodes.spi.*;
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32
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33 @NodeInfo(shortName = "%")
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34 public class IntegerRemNode extends FixedBinaryNode implements Lowerable, LIRLowerable {
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35 public static final NodeClass<IntegerRemNode> TYPE = NodeClass.create(IntegerRemNode.class);
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36
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37 public IntegerRemNode(ValueNode x, ValueNode y) {
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38 this(TYPE, x, y);
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39 }
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41 protected IntegerRemNode(NodeClass<? extends IntegerRemNode> c, ValueNode x, ValueNode y) {
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42 super(c, IntegerStamp.OPS.getRem().foldStamp(x.stamp(), y.stamp()), x, y);
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43 }
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44
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45 @Override
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46 public boolean inferStamp() {
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47 return updateStamp(IntegerStamp.OPS.getRem().foldStamp(getX().stamp(), getY().stamp()));
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48 }
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49
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50 @Override
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51 public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
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52 if (forX.isConstant() && forY.isConstant()) {
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53 @SuppressWarnings("hiding")
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54 long y = forY.asJavaConstant().asLong();
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55 if (y == 0) {
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56 return this; // this will trap, can not canonicalize
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57 }
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58 return ConstantNode.forIntegerStamp(stamp(), forX.asJavaConstant().asLong() % y);
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59 } else if (forY.isConstant()) {
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60 long c = forY.asJavaConstant().asLong();
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61 if (c == 1 || c == -1) {
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62 return ConstantNode.forIntegerStamp(stamp(), 0);
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63 } else if (c > 0 && CodeUtil.isPowerOf2(c) && forX.stamp() instanceof IntegerStamp && ((IntegerStamp) forX.stamp()).isPositive()) {
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64 return new AndNode(forX, ConstantNode.forIntegerStamp(stamp(), c - 1));
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65 }
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66 }
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67 return this;
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68 }
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70 @Override
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71 public void lower(LoweringTool tool) {
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72 tool.getLowerer().lower(this, tool);
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73 }
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75 @Override
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76 public void generate(NodeLIRBuilderTool gen) {
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77 gen.setResult(this, gen.getLIRGeneratorTool().emitRem(gen.operand(getX()), gen.operand(getY()), gen.state(this)));
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78 }
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79
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80 @Override
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81 public boolean canDeoptimize() {
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82 return !(getY().stamp() instanceof IntegerStamp) || ((IntegerStamp) getY().stamp()).contains(0);
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83 }
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84 }