Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/RegisterArray.java @ 24125:0c5404418ec2
Backout getMarkName fix
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Tue, 11 Apr 2017 08:59:43 -0700 |
parents | 9e1235406b59 |
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1 /* |
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2 * Copyright (c) 2009, 2016, 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 jdk.vm.ci.code; |
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24 |
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25 import java.util.Arrays; |
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26 import java.util.Collection; |
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27 import java.util.Collections; |
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28 import java.util.Iterator; |
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29 import java.util.List; |
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30 |
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31 /** |
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32 * An immutable ordered list of registers. Only required because Java lacks immutable arrays. |
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33 */ |
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34 public final class RegisterArray implements Iterable<Register> { |
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35 |
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36 private final Register[] registers; |
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37 private int hash; |
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38 |
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39 public RegisterArray(Register... registers) { |
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40 this.registers = registers; |
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41 } |
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42 |
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43 public RegisterArray(Collection<Register> registers) { |
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44 this.registers = registers.toArray(new Register[registers.size()]); |
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45 } |
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46 |
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47 /** |
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48 * Gets the number of registers. |
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49 */ |
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50 public int size() { |
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51 return registers.length; |
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52 } |
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53 |
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54 /** |
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55 * Gets the register at a given index. |
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56 * |
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57 * @param index the index of the register to retrieve |
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58 */ |
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59 public Register get(int index) { |
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60 return registers[index]; |
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61 } |
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62 |
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63 public void addTo(Collection<Register> collection) { |
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64 collection.addAll(Arrays.asList(registers)); |
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65 } |
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66 |
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67 /** |
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68 * Gets an immutable view of the registers as a list. |
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69 */ |
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70 public List<Register> asList() { |
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71 return Collections.unmodifiableList(Arrays.asList(registers)); |
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72 } |
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73 |
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74 /** |
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75 * Gets a copy of the registers as an array. |
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76 */ |
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77 public Register[] toArray() { |
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78 return registers.clone(); |
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79 } |
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80 |
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81 public Iterator<Register> iterator() { |
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82 return Arrays.asList(registers).iterator(); |
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83 } |
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84 |
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85 @Override |
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86 public int hashCode() { |
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87 if (hash == 0 && registers.length > 0) { |
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88 hash = Arrays.hashCode(registers); |
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89 } |
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90 return hash; |
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91 } |
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92 |
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93 @Override |
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94 public boolean equals(Object obj) { |
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95 if (obj instanceof RegisterArray) { |
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96 return Arrays.equals(registers, ((RegisterArray) obj).registers); |
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97 } |
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98 return false; |
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99 } |
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100 |
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101 @Override |
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102 public String toString() { |
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103 return Arrays.toString(registers); |
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104 } |
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105 } |