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annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/lir/LIROperand.java @ 2874:d90bf514d647

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Renamed packages.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 08 Jun 2011 08:59:54 +0200
parents graal/com.oracle.max.graal.compiler/src/com/sun/c1x/lir/LIROperand.java@0341b6424579
children
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1 /*
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2 * Copyright (c) 2009, 2010, 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.max.graal.compiler.lir;
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24
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25 import com.sun.cri.ci.*;
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26
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27 /**
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28 * An instruction operand. If the register allocator can modify this operand (e.g. to replace a
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29 * variable with a register), then it will have a corresponding entry in the {@link LIRInstruction#allocatorOperands}
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30 * list of an instruction.
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31 *
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32 * @author Doug Simon
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33 */
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34 public class LIROperand {
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35
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36 /**
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37 * The value of the operand.
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38 */
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39 CiValue value;
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40
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41 LIROperand(CiValue value) {
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42 this.value = value;
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43 }
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44
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45 /**
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46 * Gets the value of this operand. This may still be a {@linkplain CiVariable}
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47 * if the register allocator has not yet assigned a register or stack address to the operand.
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48 *
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49 * @param inst the instruction containing this operand
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50 */
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51 public CiValue value(LIRInstruction inst) {
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52 return value;
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53 }
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54
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55 @Override
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56 public String toString() {
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57 return value.toString();
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58 }
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59
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60 static class LIRVariableOperand extends LIROperand {
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61 /**
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62 * Index into an instruction's {@linkplain LIRInstruction#allocatorOperands allocator operands}.
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63 */
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64 final int index;
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65
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66 LIRVariableOperand(int index) {
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67 super(null);
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68 this.index = index;
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69 }
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70
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71 @Override
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72 public CiValue value(LIRInstruction inst) {
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73 if (value == null) {
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74 CiValue value = inst.allocatorOperands.get(index);
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75 if (value.isVariable()) {
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76 return value;
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77 }
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78 this.value = value;
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79 }
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80 return value;
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81 }
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82
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83 @Override
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84 public String toString() {
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85 if (value == null) {
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86 return "operands[" + index + "]";
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87 }
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88 return value.toString();
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89 }
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90 }
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91
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92 /**
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93 * An address operand with at least one {@linkplain CiVariable variable} constituent.
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94 */
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95 static class LIRAddressOperand extends LIROperand {
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96 int base;
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97 int index;
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98
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99 LIRAddressOperand(int base, int index, CiAddress address) {
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100 super(address);
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101 assert base != -1 || index != -1 : "address should have at least one variable part";
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102 this.base = base;
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103 this.index = index;
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104 }
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105
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106 @Override
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107 public CiValue value(LIRInstruction inst) {
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108 if (base != -1 || index != -1) {
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109 CiAddress address = (CiAddress) value;
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110 CiValue baseOperand = base == -1 ? address.base : inst.allocatorOperands.get(base);
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111 CiValue indexOperand = index == -1 ? address.index : inst.allocatorOperands.get(index);
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112 if (address.index.isLegal()) {
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113 assert indexOperand.isVariableOrRegister();
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114 if (baseOperand.isVariable() || indexOperand.isVariable()) {
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115 return address;
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116 }
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117 } else {
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118 if (baseOperand.isVariable()) {
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119 return address;
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120 }
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121 }
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122 value = new CiAddress(address.kind, baseOperand, indexOperand, address.scale, address.displacement);
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123 base = -1;
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124 index = -1;
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125 }
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126 return value;
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127 }
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128
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129 @Override
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130 public String toString() {
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131 return value.toString();
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132 }
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133 }
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134 }