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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Compare.java @ 2856:3a4ad04d60a1

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Added compare node.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Tue, 07 Jun 2011 15:56:21 +0200
parents
children c6af2af32b3d
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1 /*
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2 * Copyright (c) 2011, 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.ci.*;
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29
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30 public final class Compare extends Value {
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31
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32 private static final int INPUT_COUNT = 2;
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33 private static final int INPUT_X = 0;
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34 private static final int INPUT_Y = 1;
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35
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36 private static final int SUCCESSOR_COUNT = 0;
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37
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38 @Override
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39 protected int inputCount() {
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40 return super.inputCount() + INPUT_COUNT;
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41 }
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42
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43 @Override
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44 protected int successorCount() {
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45 return super.successorCount() + SUCCESSOR_COUNT;
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46 }
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47
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48 /**
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49 * The instruction that produces the first input to this comparison.
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50 */
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51 public Value x() {
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52 return (Value) inputs().get(super.inputCount() + INPUT_X);
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53 }
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54
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55 public Value setX(Value n) {
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56 return (Value) inputs().set(super.inputCount() + INPUT_X, n);
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57 }
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58
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59 /**
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60 * The instruction that produces the second input to this comparison.
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61 */
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62 public Value y() {
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63 return (Value) inputs().get(super.inputCount() + INPUT_Y);
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64 }
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65
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66 public Value setY(Value n) {
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67 return (Value) inputs().set(super.inputCount() + INPUT_Y, n);
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68 }
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69
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70 Condition condition;
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71 boolean unorderedIsTrue;
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72
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73 /**
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74 * Constructs a new If instruction.
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75 * @param x the instruction producing the first input to the instruction
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76 * @param condition the condition (comparison operation)
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77 * @param y the instruction that produces the second input to this instruction
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78 * @param graph
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79 */
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80 public Compare(Value x, Condition condition, Value y, Graph graph) {
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81 super(CiKind.Illegal, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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82 assert (x == null && y == null) || Util.archKindsEqual(x, y);
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83 this.condition = condition;
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84 setX(x);
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85 setY(y);
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86 }
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87
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88 /**
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89 * Gets the condition (comparison operation) for this instruction.
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90 * @return the condition
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91 */
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92 public Condition condition() {
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93 return condition;
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94 }
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95
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96 /**
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97 * Checks whether unordered inputs mean true or false.
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98 * @return {@code true} if unordered inputs produce true
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99 */
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100 public boolean unorderedIsTrue() {
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101 return unorderedIsTrue;
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102 }
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103
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104 /**
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105 * Swaps the operands to this if and reverses the condition (e.g. > goes to <=).
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106 * @see Condition#mirror()
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107 */
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108 public void swapOperands() {
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109 condition = condition.mirror();
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110 Value t = x();
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111 setX(y());
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112 setY(t);
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113 }
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114
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115 @Override
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116 public void accept(ValueVisitor v) {
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117 }
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118
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119 @Override
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120 public void print(LogStream out) {
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121 out.print("comp ").
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122 print(x()).
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123 print(' ').
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124 print(condition().operator).
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125 print(' ').
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126 print(y());
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127 }
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128
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129 @Override
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130 public String shortName() {
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131 return "Comp " + condition.operator;
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132 }
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133
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134 @Override
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135 public Node copy(Graph into) {
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136 Compare x = new Compare(null, condition, null, into);
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137 x.unorderedIsTrue = unorderedIsTrue;
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138 x.setNonNull(isNonNull());
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139 return x;
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140 }
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141 }