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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiStackSlot.java @ 4560:e43d36482d12

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Merge
author Gilles Duboscq <duboscq@ssw.jku.at>
date Fri, 10 Feb 2012 17:09:39 +0100
parents 1e3ecb08767d
children 438ab53efdd0
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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.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 private static final long serialVersionUID = -7725071921307318433L;
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33
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34 private final int offset;
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35 private final boolean addFrameSize;
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36
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37 /**
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38 * Gets a {@link CiStackSlot} instance representing a stack slot at a given index
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39 * holding a value of a given kind.
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40 *
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41 * @param kind The kind of the value stored in the stack slot.
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42 * @param offset The offset of the stack slot (in bytes)
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43 * @param inCallerFrame Specifies if the offset is relative to the stack pointer,
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44 * or the beginning of the frame (stack pointer + total frame size).
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45 */
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46 public static CiStackSlot get(CiKind kind, int offset, boolean addFrameSize) {
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47 assert kind.stackKind() == kind;
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48 assert addFrameSize || offset >= 0;
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49
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50 if (offset % CACHE_GRANULARITY == 0) {
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51 CiStackSlot[][] cache;
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52 int index = offset / CACHE_GRANULARITY;
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53 if (!addFrameSize) {
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54 cache = OUT_CACHE;
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55 } else if (offset >= 0) {
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56 cache = IN_CACHE;
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57 } else {
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58 cache = SPILL_CACHE;
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59 index = -index;
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60 }
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61 CiStackSlot[] slots = cache[kind.ordinal()];
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62 if (index < slots.length) {
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63 CiStackSlot slot = slots[index];
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64 assert slot.kind == kind && slot.offset == offset && slot.addFrameSize == addFrameSize;
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65 return slot;
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66 }
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67 }
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68 return new CiStackSlot(kind, offset, addFrameSize);
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69 }
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71 /**
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72 * Private constructor to enforce use of {@link #get()} so that a cache can be used.
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73 */
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74 private CiStackSlot(CiKind kind, int offset, boolean addFrameSize) {
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75 super(kind);
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76 this.offset = offset;
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77 this.addFrameSize = addFrameSize;
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78 }
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80 /**
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81 * Gets the offset of this stack slot, relative to the stack pointer.
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82 * @return The offset of this slot (in bytes).
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83 */
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84 public int offset(int totalFrameSize) {
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85 assert totalFrameSize > 0 || !addFrameSize;
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86 int result = offset + (addFrameSize ? totalFrameSize : 0);
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87 assert result >= 0;
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88 return result;
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89 }
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90
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91 public boolean inCallerFrame() {
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92 return addFrameSize && offset >= 0;
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93 }
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94
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95 public int rawOffset() {
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96 return offset;
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97 }
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98
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99 public boolean rawAddFrameSize() {
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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100 return addFrameSize;
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101 }
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102
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103 @Override
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104 public int hashCode() {
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105 return kind.ordinal() ^ (offset << 4) ^ (addFrameSize ? 15 : 0);
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106 }
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107
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108 @Override
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109 public boolean equals(Object o) {
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110 if (o == this) {
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111 return true;
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112 }
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113 if (o instanceof CiStackSlot) {
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114 CiStackSlot l = (CiStackSlot) o;
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115 return l.kind == kind && l.offset == offset && l.addFrameSize == addFrameSize;
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116 }
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117 return false;
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118 }
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119
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120 @Override
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121 public String toString() {
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122 if (!addFrameSize) {
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123 return "out:" + offset + kindSuffix();
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124 } else if (offset >= 0) {
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125 return "in:" + offset + kindSuffix();
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126 } else {
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1e3ecb08767d Output of lifetime intervals for new register allocator
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127 return "stack:" + (-offset) + kindSuffix();
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128 }
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129 }
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130
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131 /**
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132 * Gets this stack slot used to pass an argument from the perspective of a caller.
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133 */
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134 public CiStackSlot asOutArg() {
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135 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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136 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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137 return get(kind, offset, false);
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138 }
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139 return this;
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140 }
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141
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142 /**
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143 * Gets this stack slot used to pass an argument from the perspective of a callee.
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144 */
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145 public CiStackSlot asInArg() {
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146 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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147 if (!addFrameSize) {
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148 return get(kind, offset, true);
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149 }
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150 return this;
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151 }
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152
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153
4181
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154 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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155 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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156 private static final int PARAM_CACHE_PER_KIND_SIZE = 10;
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157
4181
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158 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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159 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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160 private static final CiStackSlot[][] OUT_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, false);
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161
4181
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162 private static CiStackSlot[][] makeCache(int cachePerKindSize, int sign, boolean addFrameSize) {
3733
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163 CiStackSlot[][] cache = new CiStackSlot[CiKind.VALUES.length][];
4181
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diff changeset
164 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.
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diff changeset
165 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
166 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
167 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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168 }
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>
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diff changeset
169 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
170 }
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171 return cache;
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172 }
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173 }