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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiStackSlot.java @ 5504:452f91ebdb54

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Moved RiKind to cri.ri package.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 07 Jun 2012 17:09:57 +0200
parents 438ab53efdd0
children 56860d3f9f39
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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.oracle.max.cri.ci;
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24
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25 import static com.oracle.max.cri.ri.RiKind.*;
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26
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27 import com.oracle.max.cri.ri.*;
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28
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29 /**
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30 * Represents a compiler spill slot or an outgoing stack-based argument in a method's frame
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31 * or an incoming stack-based argument in a method's {@linkplain #inCallerFrame() caller's frame}.
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32 */
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33 public final class CiStackSlot extends CiValue {
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34 private static final long serialVersionUID = -7725071921307318433L;
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35
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36 private final int offset;
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37 private final boolean addFrameSize;
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38
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39 /**
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40 * Gets a {@link CiStackSlot} instance representing a stack slot at a given index
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41 * holding a value of a given kind.
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42 *
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43 * @param kind The kind of the value stored in the stack slot.
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44 * @param offset The offset of the stack slot (in bytes)
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45 * @param inCallerFrame Specifies if the offset is relative to the stack pointer,
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46 * or the beginning of the frame (stack pointer + total frame size).
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47 */
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48 public static CiStackSlot get(RiKind kind, int offset, boolean addFrameSize) {
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49 assert kind.stackKind() == kind;
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50 assert addFrameSize || offset >= 0;
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51
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52 if (offset % CACHE_GRANULARITY == 0) {
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53 CiStackSlot[][] cache;
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54 int index = offset / CACHE_GRANULARITY;
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55 if (!addFrameSize) {
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56 cache = OUT_CACHE;
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57 } else if (offset >= 0) {
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58 cache = IN_CACHE;
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59 } else {
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60 cache = SPILL_CACHE;
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61 index = -index;
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62 }
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63 CiStackSlot[] slots = cache[kind.ordinal()];
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64 if (index < slots.length) {
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65 CiStackSlot slot = slots[index];
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66 assert slot.kind == kind && slot.offset == offset && slot.addFrameSize == addFrameSize;
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67 return slot;
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68 }
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69 }
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70 return new CiStackSlot(kind, offset, addFrameSize);
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71 }
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73 /**
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74 * Private constructor to enforce use of {@link #get()} so that a cache can be used.
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75 */
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76 private CiStackSlot(RiKind kind, int offset, boolean addFrameSize) {
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77 super(kind);
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78 this.offset = offset;
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79 this.addFrameSize = addFrameSize;
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80 }
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82 /**
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83 * Gets the offset of this stack slot, relative to the stack pointer.
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84 * @return The offset of this slot (in bytes).
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85 */
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86 public int offset(int totalFrameSize) {
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87 assert totalFrameSize > 0 || !addFrameSize;
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88 int result = offset + (addFrameSize ? totalFrameSize : 0);
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89 assert result >= 0;
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90 return result;
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91 }
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92
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93 public boolean inCallerFrame() {
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94 return addFrameSize && offset >= 0;
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95 }
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96
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.
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97 public int rawOffset() {
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98 return offset;
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.
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99 }
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100
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101 public boolean rawAddFrameSize() {
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102 return addFrameSize;
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103 }
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104
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105 @Override
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106 public int hashCode() {
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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.
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107 return kind.ordinal() ^ (offset << 4) ^ (addFrameSize ? 15 : 0);
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108 }
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109
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110 @Override
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111 public boolean equals(Object o) {
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112 if (o == this) {
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113 return true;
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114 }
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115 if (o instanceof CiStackSlot) {
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116 CiStackSlot l = (CiStackSlot) o;
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117 return l.kind == kind && l.offset == offset && l.addFrameSize == addFrameSize;
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118 }
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119 return false;
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120 }
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121
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122 @Override
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123 public String toString() {
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124 if (!addFrameSize) {
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125 return "out:" + offset + kindSuffix();
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126 } else if (offset >= 0) {
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127 return "in:" + offset + kindSuffix();
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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.
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128 } else {
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1e3ecb08767d Output of lifetime intervals for new register allocator
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129 return "stack:" + (-offset) + kindSuffix();
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130 }
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131 }
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132
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133 /**
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134 * Gets this stack slot used to pass an argument from the perspective of a caller.
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135 */
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136 public CiStackSlot asOutArg() {
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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.
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137 assert offset >= 0;
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.
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138 if (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.
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139 return get(kind, offset, false);
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140 }
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141 return this;
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142 }
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143
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144 /**
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145 * Gets this stack slot used to pass an argument from the perspective of a callee.
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146 */
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147 public CiStackSlot asInArg() {
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148 assert offset >= 0;
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149 if (!addFrameSize) {
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150 return get(kind, offset, true);
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151 }
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152 return this;
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153 }
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154
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155
4181
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156 private static final int CACHE_GRANULARITY = 8;
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.
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157 private static final int SPILL_CACHE_PER_KIND_SIZE = 100;
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.
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158 private static final int PARAM_CACHE_PER_KIND_SIZE = 10;
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159
4181
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160 private static final CiStackSlot[][] SPILL_CACHE = makeCache(SPILL_CACHE_PER_KIND_SIZE, -1, true);
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.
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161 private static final CiStackSlot[][] IN_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, true);
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.
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162 private static final CiStackSlot[][] OUT_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, false);
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163
4181
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164 private static CiStackSlot[][] makeCache(int cachePerKindSize, int sign, boolean addFrameSize) {
5503
438ab53efdd0 Renaming CiKind => RiKind.
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diff changeset
165 CiStackSlot[][] cache = new CiStackSlot[RiKind.VALUES.length][];
438ab53efdd0 Renaming CiKind => RiKind.
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diff changeset
166 for (RiKind kind : new RiKind[] {Illegal, Int, Long, Float, Double, Object, Jsr}) {
4181
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167 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.
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diff changeset
168 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.
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diff changeset
169 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.
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170 }
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.
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diff changeset
171 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.
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diff changeset
172 }
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173 return cache;
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174 }
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175 }