Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.code/src/com/oracle/jvmci/code/StackSlot.java @ 21746:372fd062bb85
improved names of arraycopy snippet counters
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 05 Jun 2015 17:07:45 +0200 |
parents | 48c1ebd24120 |
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1 /* |
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2 * Copyright (c) 2010, 2014, 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.jvmci.code; |
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24 |
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25 import com.oracle.jvmci.meta.LIRKind; |
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26 |
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27 /** |
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28 * Represents a compiler spill slot or an outgoing stack-based argument in a method's frame or an |
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29 * incoming stack-based argument in a method's {@linkplain #isInCallerFrame() caller's frame}. |
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30 */ |
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31 public final class StackSlot extends StackSlotValue { |
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32 |
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33 private final int offset; |
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34 private final boolean addFrameSize; |
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35 |
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36 /** |
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37 * Gets a {@link StackSlot} instance representing a stack slot at a given index holding a value |
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38 * of a given kind. |
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39 * |
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40 * @param kind The kind of the value stored in the stack slot. |
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41 * @param offset The offset of the stack slot (in bytes) |
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42 * @param addFrameSize Specifies if the offset is relative to the stack pointer, or the |
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43 * beginning of the frame (stack pointer + total frame size). |
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44 */ |
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45 public static StackSlot get(LIRKind kind, int offset, boolean addFrameSize) { |
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46 assert addFrameSize || offset >= 0; |
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47 return new StackSlot(kind, offset, addFrameSize); |
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48 } |
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49 |
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50 /** |
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51 * Private constructor to enforce use of {@link #get(LIRKind, int, boolean)} so that a cache can |
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52 * be used. |
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53 */ |
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54 private StackSlot(LIRKind kind, int offset, boolean addFrameSize) { |
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55 super(kind); |
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56 this.offset = offset; |
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57 this.addFrameSize = addFrameSize; |
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58 } |
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59 |
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60 /** |
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61 * Gets the offset of this stack slot, relative to the stack pointer. |
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62 * |
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63 * @return The offset of this slot (in bytes). |
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64 */ |
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65 public int getOffset(int totalFrameSize) { |
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66 assert totalFrameSize > 0 || !addFrameSize; |
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67 int result = offset + (addFrameSize ? totalFrameSize : 0); |
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68 assert result >= 0; |
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69 return result; |
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70 } |
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71 |
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72 public boolean isInCallerFrame() { |
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73 return addFrameSize && offset >= 0; |
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74 } |
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75 |
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76 public int getRawOffset() { |
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77 return offset; |
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78 } |
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79 |
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80 public boolean getRawAddFrameSize() { |
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81 return addFrameSize; |
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82 } |
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83 |
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84 @Override |
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85 public String toString() { |
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86 if (!addFrameSize) { |
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87 return "out:" + offset + getKindSuffix(); |
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88 } else if (offset >= 0) { |
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89 return "in:" + offset + getKindSuffix(); |
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90 } else { |
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91 return "stack:" + (-offset) + getKindSuffix(); |
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92 } |
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93 } |
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94 |
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95 /** |
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96 * Gets this stack slot used to pass an argument from the perspective of a caller. |
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97 */ |
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98 public StackSlot asOutArg() { |
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99 assert offset >= 0; |
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100 if (addFrameSize) { |
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101 return get(getLIRKind(), offset, false); |
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102 } |
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103 return this; |
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104 } |
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105 |
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106 /** |
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107 * Gets this stack slot used to pass an argument from the perspective of a callee. |
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108 */ |
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109 public StackSlot asInArg() { |
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110 assert offset >= 0; |
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111 if (!addFrameSize) { |
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112 return get(getLIRKind(), offset, true); |
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113 } |
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114 return this; |
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115 } |
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116 |
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117 @Override |
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118 public int hashCode() { |
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119 final int prime = 37; |
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120 int result = super.hashCode(); |
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121 result = prime * result + (addFrameSize ? 1231 : 1237); |
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122 result = prime * result + offset; |
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123 return result; |
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124 } |
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125 |
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126 @Override |
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127 public boolean equals(Object obj) { |
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128 if (obj instanceof StackSlot) { |
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129 StackSlot other = (StackSlot) obj; |
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130 return super.equals(obj) && addFrameSize == other.addFrameSize && offset == other.offset; |
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131 } |
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132 return false; |
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133 } |
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134 } |