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annotate graal/GraalCompiler/src/com/sun/c1x/ir/NegateOp.java @ 2603:01c5c0443158

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new node layout: Phi
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 06 May 2011 11:18:15 +0200
parents 51ebe5f0516f
children 4a6518c4d17d
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1 /*
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2 * Copyright (c) 2009, 2011, 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.sun.c1x.ir;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.sun.c1x.debug.*;
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27 import com.sun.c1x.util.*;
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28 import com.sun.cri.bytecode.*;
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29
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30 /**
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31 * The {@code NegateOp} instruction negates its operand.
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32 *
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33 * @author Ben L. Titzer
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34 */
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35 public final class NegateOp extends Instruction {
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36
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37 private static final int INPUT_COUNT = 2;
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38 private static final int INPUT_X = 0;
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39 private static final int INPUT_Y = 1;
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40
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41 private static final int SUCCESSOR_COUNT = 0;
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42
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43 @Override
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44 protected int inputCount() {
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45 return super.inputCount() + INPUT_COUNT;
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46 }
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47
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48 @Override
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49 protected int successorCount() {
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50 return super.successorCount() + SUCCESSOR_COUNT;
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51 }
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52
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53 /**
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54 * The instruction producing input to this instruction.
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55 */
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56 public Value x() {
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57 return (Value) inputs().get(super.inputCount() + INPUT_X);
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58 }
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59
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60 public Value setX(Value n) {
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61 return (Value) inputs().set(super.inputCount() + INPUT_X, n);
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62 }
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63
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64 /**
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65 * Creates new NegateOp instance.
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66 * @param x the instruction producing the value that is input to this instruction
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67 */
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68 public NegateOp(Value x, Graph graph) {
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69 super(x.kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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70 setX(x);
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71 }
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72
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73 @Override
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74 public void accept(ValueVisitor v) {
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75 v.visitNegateOp(this);
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76 }
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77
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78 @Override
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79 public int valueNumber() {
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80 return Util.hash1(Bytecodes.INEG, x());
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81 }
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82
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83 @Override
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84 public boolean valueEqual(Instruction i) {
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85 if (i instanceof NegateOp) {
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86 NegateOp o = (NegateOp) i;
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87 return x() == o.x();
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88 }
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89 return false;
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90 }
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91
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92 @Override
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93 public void print(LogStream out) {
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94 out.print("- ").print(x());
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95 }
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96 }