Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/ir/BlockList.java @ 2750:6048da340364
less references to BlockBegin in BlockEnd instructions
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 20 May 2011 14:22:19 +0200 |
parents | 4a6518c4d17d |
children | d3fc4fe063bf |
rev | line source |
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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.ir; |
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24 |
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25 import java.util.*; |
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26 |
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27 /** |
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28 * The {@code BlockList} class implements a specialized list data structure for representing |
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29 * the predecessor and successor lists of basic blocks. |
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30 */ |
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31 public class BlockList implements Iterable<BlockBegin> { |
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32 |
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33 private BlockBegin[] array; |
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34 private int cursor; |
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35 |
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36 BlockList(int sizeHint) { |
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37 if (sizeHint > 0) { |
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38 array = new BlockBegin[sizeHint]; |
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39 } else { |
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40 array = new BlockBegin[2]; |
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41 } |
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42 } |
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43 |
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44 public void remove(int index) { |
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45 if (index < 0 || index >= cursor) { |
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46 throw new IndexOutOfBoundsException(); |
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47 } |
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48 for (int i = index; i < cursor; i++) { |
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49 array[i] = array[i + 1]; |
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50 } |
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51 cursor--; |
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52 } |
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53 |
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54 public void remove(BlockBegin block) { |
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55 int j = 0; |
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56 for (int i = 0; i < cursor; i++) { |
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57 if (i != j) { |
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58 array[j] = array[i]; |
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59 } |
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60 if (array[i] != block) { |
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61 j++; |
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62 } |
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63 } |
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64 cursor = j; |
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65 } |
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66 |
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67 public void exchange(int index1, int index2) { |
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68 if (index1 < 0 || index1 >= cursor) { |
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69 throw new IndexOutOfBoundsException(); |
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70 } |
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71 if (index2 < 0 || index2 >= cursor) { |
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72 throw new IndexOutOfBoundsException(); |
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73 } |
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74 BlockBegin t = array[index2]; |
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75 array[index2] = array[index1]; |
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76 array[index1] = t; |
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77 } |
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78 |
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79 public void insert(int index, BlockBegin block) { |
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80 if (index < 0 || index >= cursor) { |
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81 throw new IndexOutOfBoundsException(); |
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82 } |
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83 growOne(); |
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84 for (int i = cursor; i > index; i--) { |
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85 array[i] = array[i - 1]; |
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86 } |
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87 array[cursor++] = block; |
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88 } |
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89 |
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90 public void append(BlockBegin block) { |
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91 growOne(); |
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92 array[cursor++] = block; |
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93 } |
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94 |
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95 public BlockBegin get(int index) { |
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96 if (index < 0 || index >= cursor) { |
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97 throw new IndexOutOfBoundsException(); |
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98 } |
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99 return array[index]; |
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100 } |
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101 |
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102 public void replace(BlockBegin oldBlock, BlockBegin newBlock) { |
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103 for (int i = 0; i < cursor; i++) { |
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104 if (array[i] == oldBlock) { |
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105 array[i] = newBlock; |
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106 } |
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107 } |
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108 } |
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109 |
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110 public boolean checkForSameBlock() { |
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111 if (cursor == 0) { |
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112 return true; |
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113 } |
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114 BlockBegin b = array[0]; |
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115 for (int i = 1; i < cursor; i++) { |
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116 if (array[i] != b) { |
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117 return false; |
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118 } |
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119 } |
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120 return true; |
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121 } |
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122 |
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123 public Iterator<BlockBegin> iterator() { |
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124 return new Iter(); |
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125 } |
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126 |
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127 private void growOne() { |
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128 if (cursor == array.length) { |
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129 array = Arrays.copyOf(array, array.length * 3); |
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130 } |
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131 } |
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132 |
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133 private class Iter implements Iterator<BlockBegin> { |
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134 private int pos; |
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135 |
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136 public boolean hasNext() { |
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137 return pos < cursor; |
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138 } |
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139 |
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140 public BlockBegin next() { |
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141 return array[pos++]; |
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142 } |
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143 |
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144 public void remove() { |
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145 BlockList.this.remove(pos); |
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146 } |
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147 } |
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148 } |