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annotate graal/com.oracle.max.cri/src/com/sun/cri/ci/CiStackSlot.java @ 4181:319860ae697a

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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>
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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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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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;
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
diff changeset
94 }
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
diff changeset
95
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
diff changeset
96 public int rawOffset() {
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
diff changeset
97 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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
98 }
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
diff changeset
99
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
100 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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diff changeset
101 return addFrameSize;
3733
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102 }
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103
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104 @Override
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105 public int hashCode() {
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.
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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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diff changeset
109 @Override
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110 public boolean equals(Object o) {
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diff changeset
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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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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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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diff changeset
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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parents:
diff changeset
126 if (o instanceof CiStackSlot) {
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127 CiStackSlot l = (CiStackSlot) o;
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.
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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
4169
f5328dda9714 Initial commit of SSA-based spill-all register assignment
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134 public String toString() {
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
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135 String s;
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
diff changeset
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 s = "out:";
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
diff changeset
138 } else if (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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139 s = "in:";
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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parents: 4169
diff changeset
140 } else {
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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141 s = "spill:";
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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142 }
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
143 return s + offset + kindSuffix();
3733
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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() {
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
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diff changeset
150 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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diff changeset
151 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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diff changeset
152 return get(kind, offset, false);
3733
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153 }
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154 return this;
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155 }
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parents:
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156
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
157 /**
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diff changeset
158 * Gets this stack slot used to pass an argument from the perspective of a callee.
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parents:
diff changeset
159 */
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parents:
diff changeset
160 public CiStackSlot asInArg() {
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
161 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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parents: 4169
diff changeset
162 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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
163 return get(kind, offset, true);
3733
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164 }
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165 return this;
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parents:
diff changeset
166 }
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parents:
diff changeset
167
e233f5660da4 Added Java files from Maxine project.
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parents:
diff changeset
168
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
169 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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
170 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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
171 private static final int PARAM_CACHE_PER_KIND_SIZE = 10;
3733
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172
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
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diff changeset
173 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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
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diff changeset
174 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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
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diff changeset
175 private static final CiStackSlot[][] OUT_CACHE = makeCache(PARAM_CACHE_PER_KIND_SIZE, 1, false);
3733
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diff changeset
176
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
177 private static CiStackSlot[][] makeCache(int cachePerKindSize, int sign, boolean addFrameSize) {
3733
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diff changeset
178 CiStackSlot[][] cache = new CiStackSlot[CiKind.VALUES.length][];
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.
Christian Wimmer <Christian.Wimmer@Oracle.com>
parents: 4169
diff changeset
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: 4169
diff changeset
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
diff changeset
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>
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diff changeset
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
diff changeset
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
diff changeset
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
diff changeset
185 }
3733
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diff changeset
186 return cache;
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187 }
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parents:
diff changeset
188 }