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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Op2.java @ 2585:3e0e65161345

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new node layout: Op2
author Lukas Stadler <lukas.stadler@jku.at>
date Thu, 05 May 2011 14:12:19 +0200
parents 16b9a8b5ad39
children 421da5f53b5e
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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.sun.c1x.util.*;
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26 import com.sun.cri.bytecode.*;
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27 import com.sun.cri.ci.*;
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28
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29 /**
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30 * The {@code Op2} class is the base of arithmetic and logic operations with two inputs.
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31 *
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32 * @author Ben L. Titzer
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33 */
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34 public abstract class Op2 extends Instruction {
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35
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36 private static final int INPUT_COUNT = 2;
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37 private static final int INPUT_X = 0;
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38 private static final int INPUT_Y = 1;
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39
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40 private static final int SUCCESSOR_COUNT = 0;
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41
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42 @Override
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43 protected int inputCount() {
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44 return super.inputCount() + INPUT_COUNT;
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45 }
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46
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47 @Override
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48 protected int successorCount() {
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49 return super.successorCount() + SUCCESSOR_COUNT;
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50 }
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51
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52 /**
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53 * The first input to this instruction
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54 */
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55 public Value x() {
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56 return (Value) inputs().get(super.inputCount() + INPUT_X);
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57 }
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58
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59 public Value setX(Value n) {
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60 return (Value) inputs().set(super.inputCount() + INPUT_X, n);
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61 }
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62
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63 /**
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64 * The second input to this instruction
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65 */
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66 public Value y() {
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67 return (Value) inputs().get(super.inputCount() + INPUT_Y);
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68 }
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69
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70 public Value setY(Value n) {
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71 return (Value) inputs().set(super.inputCount() + INPUT_Y, n);
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72 }
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73
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74 /**
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75 * The opcode of this instruction.
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76 */
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77 public final int opcode;
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78
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79 /**
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80 * Creates a new Op2 instance.
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81 * @param kind the result type of this instruction
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82 * @param opcode the bytecode opcode
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83 * @param x the first input instruction
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84 * @param y the second input instruction
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85 */
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86 public Op2(CiKind kind, int opcode, Value x, Value y) {
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87 super(kind, INPUT_COUNT, SUCCESSOR_COUNT, null);
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88 this.opcode = opcode;
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89 setX(x);
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90 setY(y);
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91 }
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92
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93 /**
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94 * Swaps the operands of this instruction. This is only legal for commutative operations.
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95 */
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96 public void swapOperands() {
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97 assert Bytecodes.isCommutative(opcode);
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98 Value t = x();
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99 setX(y());
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100 setY(t);
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101 }
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102
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103 /**
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104 * Iterates over the inputs to this instruction.
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105 * @param closure the closure to apply to each input value
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106 */
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107 @Override
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108 public void inputValuesDo(ValueClosure closure) {
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109 setX(closure.apply(x()));
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110 setY(closure.apply(y()));
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111 }
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112
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113 @Override
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114 public int valueNumber() {
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115 return Util.hash2(opcode, x(), y());
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116 }
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117
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118 @Override
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119 public boolean valueEqual(Instruction i) {
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120 if (i instanceof Op2) {
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121 Op2 o = (Op2) i;
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122 return opcode == o.opcode && x() == o.x() && y() == o.y();
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123 }
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124 return false;
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125 }
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126 }