Mercurial > hg > graal-jvmci-8
annotate graal/Compiler/src/com/sun/c1x/lir/LIROperand.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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2507
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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.sun.c1x.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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Pull over of compiler from maxine repository.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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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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parents:
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133 } |
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parents:
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134 } |