Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiStackSlot.java @ 4181:319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Mon, 02 Jan 2012 14:16:08 -0800 |
parents | f5328dda9714 |
children | de7b3e7ae528 |
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1 /* |
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2 * Copyright (c) 2010, 2012, 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.cri.ci; |
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24 |
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25 import static com.sun.cri.ci.CiKind.*; |
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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 |
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29 * or an incoming stack-based argument in a method's {@linkplain #inCallerFrame() caller's frame}. |
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30 */ |
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31 public final class CiStackSlot extends CiValue { |
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32 |
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33 private static final long serialVersionUID = -7725071921307318433L; |
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34 |
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35 private final int offset; |
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36 private final boolean addFrameSize; |
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37 |
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38 /** |
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39 * Gets a {@link CiStackSlot} instance representing a stack slot at a given index |
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40 * holding a value of a given kind. |
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41 * |
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42 * @param kind The kind of the value stored in the stack slot. |
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43 * @param offset The offset of the stack slot (in bytes) |
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44 * @param inCallerFrame Specifies if the offset is relative to the stack pointer, |
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45 * or the beginning of the frame (stack pointer + total frame size). |
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46 */ |
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47 public static CiStackSlot get(CiKind kind, int offset, boolean addFrameSize) { |
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48 assert kind.stackKind() == kind; |
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49 assert addFrameSize || offset >= 0; |
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50 |
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51 if (offset % CACHE_GRANULARITY == 0) { |
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52 CiStackSlot[][] cache; |
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53 int index = offset / CACHE_GRANULARITY; |
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54 if (!addFrameSize) { |
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55 cache = OUT_CACHE; |
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56 } else if (offset >= 0) { |
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57 cache = IN_CACHE; |
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58 } else { |
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59 cache = SPILL_CACHE; |
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60 index = -index; |
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61 } |
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62 CiStackSlot[] slots = cache[kind.ordinal()]; |
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63 if (index < slots.length) { |
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64 CiStackSlot slot = slots[index]; |
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65 assert slot.kind == kind && slot.offset == offset && slot.addFrameSize == addFrameSize; |
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66 return slot; |
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67 } |
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68 } |
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69 return new CiStackSlot(kind, offset, addFrameSize); |
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70 } |
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71 |
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72 /** |
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73 * Private constructor to enforce use of {@link #get()} so that a cache can be used. |
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74 */ |
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75 private CiStackSlot(CiKind kind, int offset, boolean addFrameSize) { |
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76 super(kind); |
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77 this.offset = offset; |
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78 this.addFrameSize = addFrameSize; |
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79 } |
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80 |
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81 /** |
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82 * Gets the offset of this stack slot, relative to the stack pointer. |
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83 * @return The offset of this slot (in bytes). |
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84 */ |
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85 public int offset(int totalFrameSize) { |
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86 assert totalFrameSize > 0 || !addFrameSize; |
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87 int result = offset + (addFrameSize ? totalFrameSize : 0); |
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88 assert result >= 0; |
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89 return result; |
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90 } |
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91 |
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92 public boolean inCallerFrame() { |
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93 return addFrameSize && offset >= 0; |
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94 } |
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95 |
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96 public int rawOffset() { |
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97 return offset; |
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98 } |
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99 |
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100 public boolean rawAddFrameSize() { |
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101 return addFrameSize; |
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102 } |
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103 |
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104 @Override |
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105 public int hashCode() { |
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106 return kind.ordinal() ^ (offset << 4) ^ (addFrameSize ? 15 : 0); |
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107 } |
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108 |
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109 @Override |
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110 public boolean equals(Object o) { |
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111 if (o == this) { |
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112 return true; |
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113 } |
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114 if (o instanceof CiStackSlot) { |
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115 CiStackSlot l = (CiStackSlot) o; |
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116 return l.kind == kind && l.offset == offset && l.addFrameSize == addFrameSize; |
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117 } |
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118 return false; |
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119 } |
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120 |
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121 @Override |
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122 public boolean equalsIgnoringKind(CiValue o) { |
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123 if (o == this) { |
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124 return true; |
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125 } |
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126 if (o instanceof CiStackSlot) { |
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127 CiStackSlot l = (CiStackSlot) o; |
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128 return l.offset == offset && l.addFrameSize == addFrameSize; |
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129 } |
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130 return false; |
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131 } |
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132 |
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133 @Override |
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134 public String toString() { |
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135 String s; |
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136 if (!addFrameSize) { |
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137 s = "out:"; |
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138 } else if (offset >= 0) { |
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139 s = "in:"; |
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140 } else { |
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141 s = "spill:"; |
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142 } |
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143 return s + offset + kindSuffix(); |
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144 } |
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145 |
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146 /** |
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147 * Gets this stack slot used to pass an argument from the perspective of a caller. |
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148 */ |
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149 public CiStackSlot asOutArg() { |
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150 assert offset >= 0; |
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151 if (addFrameSize) { |
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152 return get(kind, offset, false); |
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153 } |
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154 return this; |
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155 } |
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156 |
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157 /** |
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158 * Gets this stack slot used to pass an argument from the perspective of a callee. |
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159 */ |
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160 public CiStackSlot asInArg() { |
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161 assert offset >= 0; |
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162 if (!addFrameSize) { |
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163 return get(kind, offset, true); |
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164 } |
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165 return this; |
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166 } |
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167 |
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168 |
4181
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169 private static final int CACHE_GRANULARITY = 8; |
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170 private static final int SPILL_CACHE_PER_KIND_SIZE = 100; |
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171 private static final int PARAM_CACHE_PER_KIND_SIZE = 10; |
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172 |
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173 private static final CiStackSlot[][] SPILL_CACHE = makeCache(SPILL_CACHE_PER_KIND_SIZE, -1, true); |
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174 private static final CiStackSlot[][] IN_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, true); |
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175 private static final CiStackSlot[][] OUT_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, false); |
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176 |
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177 private static CiStackSlot[][] makeCache(int cachePerKindSize, int sign, boolean addFrameSize) { |
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178 CiStackSlot[][] cache = new CiStackSlot[CiKind.VALUES.length][]; |
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179 for (CiKind kind : new CiKind[] {Illegal, Int, Long, Float, Double, Object, Jsr}) { |
319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents:
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180 CiStackSlot[] slots = new CiStackSlot[cachePerKindSize]; |
319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents:
4169
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181 for (int i = 0; i < cachePerKindSize; i++) { |
319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents:
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182 slots[i] = new CiStackSlot(kind, sign * i * CACHE_GRANULARITY, addFrameSize); |
319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents:
4169
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183 } |
319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents:
4169
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184 cache[kind.ordinal()] = slots; |
319860ae697a
Simplify FrameMap: make offsets of spill slots and outgoing parameters independent so that they can be allocated at the same time, eliminating the separate phases. This makes the separate StackBlock unnecesary. Change CiStackSlot to use byte offsets instead of spill slot index. This makes CiTarget.spillSlotSize unnecessary.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents:
4169
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185 } |
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e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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186 return cache; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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187 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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188 } |