Mercurial > hg > graal-compiler

annotate graal/GraalCompiler/src/com/sun/c1x/ir/IfOp.java @ 2586:421da5f53b5e

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more Op2 changes
author Lukas Stadler <lukas.stadler@jku.at>
date Thu, 05 May 2011 14:37:17 +0200
parents 16b9a8b5ad39
children 51ebe5f0516f
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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 IfOp} class represents a comparison that yields one of two values.
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32 * Note that these nodes are not built directly from the bytecode but are introduced
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33 * by conditional expression elimination.
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34 *
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35 * @author Ben L. Titzer
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36 */
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37 public final class IfOp extends Op2 {
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38
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39 private static final int INPUT_COUNT = 2;
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40 private static final int INPUT_TRUE_VALUE = 0;
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41 private static final int INPUT_FALSE_VALUE = 1;
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42
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43 private static final int SUCCESSOR_COUNT = 0;
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44
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45 @Override
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46 protected int inputCount() {
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47 return super.inputCount() + INPUT_COUNT;
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48 }
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49
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50 @Override
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51 protected int successorCount() {
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52 return super.successorCount() + SUCCESSOR_COUNT;
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53 }
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54
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55
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56 /**
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57 * The instruction that produces the value if the comparison is true.
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58 */
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59 public Value trueValue() {
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60 return (Value) inputs().get(super.inputCount() + INPUT_TRUE_VALUE);
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61 }
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62
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63 public Value setTrueValue(Value n) {
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64 return (Value) inputs().set(super.inputCount() + INPUT_TRUE_VALUE, n);
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65 }
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66
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67 /**
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68 * The instruction that produces the value if the comparison is false.
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69 */
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70 public Value falseValue() {
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71 return (Value) inputs().get(super.inputCount() + INPUT_FALSE_VALUE);
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72 }
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73
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74 public Value setFalseValue(Value n) {
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75 return (Value) inputs().set(super.inputCount() + INPUT_FALSE_VALUE, n);
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76 }
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77
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78
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79 Condition cond;
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80
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81 /**
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82 * Constructs a new IfOp.
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83 * @param x the instruction producing the first value to be compared
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84 * @param cond the condition of the comparison
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85 * @param y the instruction producing the second value to be compared
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86 * @param trueValue the value produced if the condition is true
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87 * @param falseValue the value produced if the condition is false
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88 */
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89 public IfOp(Value x, Condition cond, Value y, Value trueValue, Value falseValue, Graph graph) {
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90 // TODO: return the appropriate bytecode IF_ICMPEQ, etc
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91 super(trueValue.kind.meet(falseValue.kind), Bytecodes.ILLEGAL, x, y, graph);
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92 this.cond = cond;
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93 setTrueValue(trueValue);
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94 setFalseValue(falseValue);
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95 }
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96
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97 /**
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98 * Gets the condition of this if operation.
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99 * @return the condition
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100 */
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101 public Condition condition() {
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102 return cond;
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103 }
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104
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105 /**
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106 * Checks whether this comparison operator is commutative (i.e. it is either == or !=).
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107 * @return {@code true} if this comparison is commutative
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108 */
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109 public boolean isCommutative() {
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110 return cond == Condition.EQ || cond == Condition.NE;
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111 }
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112
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113 @Override
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114 public void inputValuesDo(ValueClosure closure) {
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115 super.inputValuesDo(closure);
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116 setTrueValue(closure.apply(trueValue()));
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117 setFalseValue(closure.apply(falseValue()));
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118 }
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119
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120 @Override
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121 public void accept(ValueVisitor v) {
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122 v.visitIfOp(this);
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123 }
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124
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125 @Override
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126 public int valueNumber() {
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127 return Util.hash4(cond.hashCode(), x(), y(), trueValue(), falseValue());
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128 }
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129
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130 @Override
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131 public boolean valueEqual(Instruction i) {
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132 if (i instanceof IfOp) {
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133 IfOp o = (IfOp) i;
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134 return opcode == o.opcode && x() == o.x() && y() == o.y() && trueValue() == o.trueValue() && falseValue() == o.falseValue();
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135 }
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136 return false;
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137 }
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138
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139 @Override
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140 public void print(LogStream out) {
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141 out.print(x()).
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142 print(' ').
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diff changeset
143 print(condition().operator).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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144 print(' ').
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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145 print(y()).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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146 print(" ? ").
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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147 print(trueValue()).
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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148 print(" : ").
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Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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149 print(falseValue());
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Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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150 }
9ec15d6914ca Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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151 }