Mercurial > hg > truffle
annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/alloc/LinearScanWalker.java @ 3733:e233f5660da4
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author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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children | bc8527f3071c |
rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 2011, 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.graal.compiler.alloc; |
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24 |
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25 import static com.sun.cri.ci.CiUtil.*; |
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26 |
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27 import java.util.*; |
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28 |
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29 import com.oracle.max.criutils.*; |
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30 import com.oracle.max.graal.compiler.*; |
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31 import com.oracle.max.graal.compiler.alloc.Interval.RegisterBinding; |
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32 import com.oracle.max.graal.compiler.alloc.Interval.RegisterPriority; |
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33 import com.oracle.max.graal.compiler.alloc.Interval.SpillState; |
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34 import com.oracle.max.graal.compiler.alloc.Interval.State; |
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35 import com.oracle.max.graal.compiler.lir.*; |
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36 import com.oracle.max.graal.compiler.util.*; |
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37 import com.sun.cri.ci.*; |
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38 import com.sun.cri.ci.CiRegister.RegisterFlag; |
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39 |
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40 /** |
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41 */ |
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42 final class LinearScanWalker extends IntervalWalker { |
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43 |
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44 private CiRegister[] availableRegs; |
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45 |
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46 private final int[] usePos; |
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47 private final int[] blockPos; |
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48 |
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49 private List<Interval>[] spillIntervals; |
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50 |
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51 private MoveResolver moveResolver; // for ordering spill moves |
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52 |
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53 // accessors mapped to same functions in class LinearScan |
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54 int blockCount() { |
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55 return allocator.blockCount(); |
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56 } |
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57 |
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58 LIRBlock blockAt(int idx) { |
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59 return allocator.blockAt(idx); |
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60 } |
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61 |
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62 LIRBlock blockOfOpWithId(int opId) { |
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63 return allocator.blockForId(opId); |
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64 } |
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65 |
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66 LinearScanWalker(LinearScan allocator, Interval unhandledFixedFirst, Interval unhandledAnyFirst) { |
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67 super(allocator, unhandledFixedFirst, unhandledAnyFirst); |
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68 moveResolver = new MoveResolver(allocator); |
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69 spillIntervals = Util.uncheckedCast(new List[allocator.registers.length]); |
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70 for (int i = 0; i < allocator.registers.length; i++) { |
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71 spillIntervals[i] = new ArrayList<Interval>(2); |
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72 } |
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73 usePos = new int[allocator.registers.length]; |
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74 blockPos = new int[allocator.registers.length]; |
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75 } |
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76 |
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77 void initUseLists(boolean onlyProcessUsePos) { |
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78 for (CiRegister register : availableRegs) { |
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79 int i = register.number; |
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80 usePos[i] = Integer.MAX_VALUE; |
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81 |
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82 if (!onlyProcessUsePos) { |
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83 blockPos[i] = Integer.MAX_VALUE; |
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84 spillIntervals[i].clear(); |
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85 } |
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86 } |
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87 } |
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88 |
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89 void excludeFromUse(Interval i) { |
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90 CiValue location = i.location(); |
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91 int i1 = location.asRegister().number; |
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92 if (i1 >= availableRegs[0].number && i1 <= availableRegs[availableRegs.length - 1].number) { |
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93 usePos[i1] = 0; |
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94 } |
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95 } |
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96 |
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97 void setUsePos(Interval interval, int usePos, boolean onlyProcessUsePos) { |
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98 if (usePos != -1) { |
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99 assert usePos != 0 : "must use excludeFromUse to set usePos to 0"; |
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100 int i = interval.location().asRegister().number; |
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101 if (i >= availableRegs[0].number && i <= availableRegs[availableRegs.length - 1].number) { |
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102 if (this.usePos[i] > usePos) { |
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103 this.usePos[i] = usePos; |
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104 } |
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105 if (!onlyProcessUsePos) { |
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106 spillIntervals[i].add(interval); |
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107 } |
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108 } |
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109 } |
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110 } |
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111 |
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112 void setBlockPos(Interval i, int blockPos) { |
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113 if (blockPos != -1) { |
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114 int reg = i.location().asRegister().number; |
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115 if (reg >= availableRegs[0].number && reg <= availableRegs[availableRegs.length - 1].number) { |
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116 if (this.blockPos[reg] > blockPos) { |
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117 this.blockPos[reg] = blockPos; |
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118 } |
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119 if (usePos[reg] > blockPos) { |
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120 usePos[reg] = blockPos; |
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121 } |
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122 } |
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123 } |
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124 } |
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125 |
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126 void freeExcludeActiveFixed() { |
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127 Interval interval = activeLists.get(RegisterBinding.Fixed); |
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128 while (interval != Interval.EndMarker) { |
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129 assert interval.location().isRegister() : "active interval must have a register assigned"; |
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130 excludeFromUse(interval); |
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131 interval = interval.next; |
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132 } |
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133 } |
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134 |
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135 void freeExcludeActiveAny() { |
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136 Interval interval = activeLists.get(RegisterBinding.Any); |
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137 while (interval != Interval.EndMarker) { |
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138 assert interval.location().isRegister() : "active interval must have a register assigned"; |
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139 excludeFromUse(interval); |
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140 interval = interval.next; |
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141 } |
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142 } |
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143 |
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144 void freeCollectInactiveFixed(Interval current) { |
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145 Interval interval = inactiveLists.get(RegisterBinding.Fixed); |
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146 while (interval != Interval.EndMarker) { |
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147 if (current.to() <= interval.currentFrom()) { |
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148 assert interval.currentIntersectsAt(current) == -1 : "must not intersect"; |
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149 setUsePos(interval, interval.currentFrom(), true); |
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150 } else { |
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151 setUsePos(interval, interval.currentIntersectsAt(current), true); |
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152 } |
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153 interval = interval.next; |
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154 } |
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155 } |
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156 |
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157 void freeCollectInactiveAny(Interval current) { |
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158 Interval interval = inactiveLists.get(RegisterBinding.Any); |
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159 while (interval != Interval.EndMarker) { |
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160 setUsePos(interval, interval.currentIntersectsAt(current), true); |
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161 interval = interval.next; |
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162 } |
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163 } |
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164 |
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165 void freeCollectUnhandled(RegisterBinding kind, Interval current) { |
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166 Interval interval = unhandledLists.get(kind); |
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167 while (interval != Interval.EndMarker) { |
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168 setUsePos(interval, interval.intersectsAt(current), true); |
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169 if (kind == RegisterBinding.Fixed && current.to() <= interval.from()) { |
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170 setUsePos(interval, interval.from(), true); |
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171 } |
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172 interval = interval.next; |
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173 } |
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174 } |
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175 |
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176 void spillExcludeActiveFixed() { |
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177 Interval interval = activeLists.get(RegisterBinding.Fixed); |
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178 while (interval != Interval.EndMarker) { |
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179 excludeFromUse(interval); |
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180 interval = interval.next; |
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181 } |
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182 } |
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183 |
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184 void spillBlockUnhandledFixed(Interval current) { |
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185 Interval interval = unhandledLists.get(RegisterBinding.Fixed); |
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186 while (interval != Interval.EndMarker) { |
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187 setBlockPos(interval, interval.intersectsAt(current)); |
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188 interval = interval.next; |
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189 } |
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190 } |
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191 |
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192 void spillBlockInactiveFixed(Interval current) { |
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193 Interval interval = inactiveLists.get(RegisterBinding.Fixed); |
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194 while (interval != Interval.EndMarker) { |
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195 if (current.to() > interval.currentFrom()) { |
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196 setBlockPos(interval, interval.currentIntersectsAt(current)); |
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197 } else { |
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198 assert interval.currentIntersectsAt(current) == -1 : "invalid optimization: intervals intersect"; |
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199 } |
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200 |
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201 interval = interval.next; |
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202 } |
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203 } |
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204 |
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|
205 void spillCollectActiveAny() { |
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206 Interval interval = activeLists.get(RegisterBinding.Any); |
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207 while (interval != Interval.EndMarker) { |
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208 setUsePos(interval, Math.min(interval.nextUsage(RegisterPriority.LiveAtLoopEnd, currentPosition), interval.to()), false); |
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209 interval = interval.next; |
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210 } |
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211 } |
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212 |
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|
213 void spillCollectInactiveAny(Interval current) { |
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214 Interval interval = inactiveLists.get(RegisterBinding.Any); |
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215 while (interval != Interval.EndMarker) { |
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216 if (interval.currentIntersects(current)) { |
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217 setUsePos(interval, Math.min(interval.nextUsage(RegisterPriority.LiveAtLoopEnd, currentPosition), interval.to()), false); |
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218 } |
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219 interval = interval.next; |
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220 } |
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221 } |
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222 |
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223 void insertMove(int opId, Interval srcIt, Interval dstIt) { |
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224 // output all moves here. When source and target are equal, the move is |
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225 // optimized away later in assignRegNums |
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226 |
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227 opId = (opId + 1) & ~1; |
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228 LIRBlock opBlock = allocator.blockForId(opId); |
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229 assert opId > 0 && allocator.blockForId(opId - 2) == opBlock : "cannot insert move at block boundary"; |
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230 |
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231 // calculate index of instruction inside instruction list of current block |
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232 // the minimal index (for a block with no spill moves) can be calculated because the |
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233 // numbering of instructions is known. |
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|
234 // When the block already contains spill moves, the index must be increased until the |
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|
235 // correct index is reached. |
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|
236 List<LIRInstruction> list = opBlock.lir(); |
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237 int index = (opId - list.get(0).id()) >> 1; |
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|
238 assert list.get(index).id() <= opId : "error in calculation"; |
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|
239 |
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240 while (list.get(index).id() != opId) { |
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|
241 index++; |
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|
242 assert 0 <= index && index < list.size() : "index out of bounds"; |
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|
243 } |
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|
244 assert 1 <= index && index < list.size() : "index out of bounds"; |
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|
245 assert list.get(index).id() == opId : "error in calculation"; |
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|
246 |
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247 // insert new instruction before instruction at position index |
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248 moveResolver.moveInsertPosition(opBlock.lir(), index - 1); |
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249 moveResolver.addMapping(srcIt, dstIt); |
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250 } |
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251 |
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252 int findOptimalSplitPos(LIRBlock minBlock, LIRBlock maxBlock, int maxSplitPos) { |
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253 int fromBlockNr = minBlock.linearScanNumber(); |
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254 int toBlockNr = maxBlock.linearScanNumber(); |
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255 |
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256 assert 0 <= fromBlockNr && fromBlockNr < blockCount() : "out of range"; |
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257 assert 0 <= toBlockNr && toBlockNr < blockCount() : "out of range"; |
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258 assert fromBlockNr < toBlockNr : "must cross block boundary"; |
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259 |
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260 // Try to split at end of maxBlock. If this would be after |
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261 // maxSplitPos, then use the begin of maxBlock |
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262 int optimalSplitPos = maxBlock.lastLirInstructionId() + 2; |
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263 if (optimalSplitPos > maxSplitPos) { |
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264 optimalSplitPos = maxBlock.firstLirInstructionId(); |
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265 } |
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266 |
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267 int minLoopDepth = maxBlock.loopDepth(); |
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268 for (int i = toBlockNr - 1; i >= fromBlockNr; i--) { |
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269 LIRBlock cur = blockAt(i); |
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270 |
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271 if (cur.loopDepth() < minLoopDepth) { |
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272 // block with lower loop-depth found . split at the end of this block |
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273 minLoopDepth = cur.loopDepth(); |
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274 optimalSplitPos = cur.lastLirInstructionId() + 2; |
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275 } |
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276 } |
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277 assert optimalSplitPos > allocator.maxOpId() || allocator.isBlockBegin(optimalSplitPos) : "algorithm must move split pos to block boundary"; |
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278 |
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279 return optimalSplitPos; |
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280 } |
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281 |
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282 int findOptimalSplitPos(Interval interval, int minSplitPos, int maxSplitPos, boolean doLoopOptimization) { |
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283 int optimalSplitPos = -1; |
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284 if (minSplitPos == maxSplitPos) { |
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285 // trivial case, no optimization of split position possible |
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286 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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287 TTY.println(" min-pos and max-pos are equal, no optimization possible"); |
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288 } |
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289 optimalSplitPos = minSplitPos; |
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290 |
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291 } else { |
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292 assert minSplitPos < maxSplitPos : "must be true then"; |
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293 assert minSplitPos > 0 : "cannot access minSplitPos - 1 otherwise"; |
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294 |
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295 // reason for using minSplitPos - 1: when the minimal split pos is exactly at the |
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296 // beginning of a block, then minSplitPos is also a possible split position. |
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297 // Use the block before as minBlock, because then minBlock.lastLirInstructionId() + 2 == minSplitPos |
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298 LIRBlock minBlock = allocator.blockForId(minSplitPos - 1); |
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299 |
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300 // reason for using maxSplitPos - 1: otherwise there would be an assert on failure |
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301 // when an interval ends at the end of the last block of the method |
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302 // (in this case, maxSplitPos == allocator().maxLirOpId() + 2, and there is no |
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303 // block at this opId) |
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304 LIRBlock maxBlock = allocator.blockForId(maxSplitPos - 1); |
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305 |
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306 assert minBlock.linearScanNumber() <= maxBlock.linearScanNumber() : "invalid order"; |
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307 if (minBlock == maxBlock) { |
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308 // split position cannot be moved to block boundary : so split as late as possible |
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309 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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310 TTY.println(" cannot move split pos to block boundary because minPos and maxPos are in same block"); |
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311 } |
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312 optimalSplitPos = maxSplitPos; |
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313 |
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314 } else { |
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315 if (interval.hasHoleBetween(maxSplitPos - 1, maxSplitPos) && !allocator.isBlockBegin(maxSplitPos)) { |
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316 // Do not move split position if the interval has a hole before maxSplitPos. |
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317 // Intervals resulting from Phi-Functions have more than one definition (marked |
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318 // as mustHaveRegister) with a hole before each definition. When the register is needed |
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319 // for the second definition : an earlier reloading is unnecessary. |
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320 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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321 TTY.println(" interval has hole just before maxSplitPos, so splitting at maxSplitPos"); |
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322 } |
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323 optimalSplitPos = maxSplitPos; |
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324 |
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325 } else { |
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326 // seach optimal block boundary between minSplitPos and maxSplitPos |
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327 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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328 TTY.println(" moving split pos to optimal block boundary between block B%d and B%d", minBlock.blockID(), maxBlock.blockID()); |
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329 } |
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330 |
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331 if (doLoopOptimization) { |
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332 // Loop optimization: if a loop-end marker is found between min- and max-position : |
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333 // then split before this loop |
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334 int loopEndPos = interval.nextUsageExact(RegisterPriority.LiveAtLoopEnd, minBlock.lastLirInstructionId() + 2); |
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335 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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336 TTY.println(" loop optimization: loop end found at pos %d", loopEndPos); |
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337 } |
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338 |
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339 assert loopEndPos > minSplitPos : "invalid order"; |
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340 if (loopEndPos < maxSplitPos) { |
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341 // loop-end marker found between min- and max-position |
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342 // if it is not the end marker for the same loop as the min-position : then move |
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343 // the max-position to this loop block. |
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344 // Desired result: uses tagged as shouldHaveRegister inside a loop cause a reloading |
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345 // of the interval (normally, only mustHaveRegister causes a reloading) |
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346 LIRBlock loopBlock = allocator.blockForId(loopEndPos); |
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347 |
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348 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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349 TTY.println(" interval is used in loop that ends in block B%d, so trying to move maxBlock back from B%d to B%d", loopBlock.blockID(), maxBlock.blockID(), loopBlock.blockID()); |
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350 } |
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351 assert loopBlock != minBlock : "loopBlock and minBlock must be different because block boundary is needed between"; |
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352 |
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353 optimalSplitPos = findOptimalSplitPos(minBlock, loopBlock, loopBlock.lastLirInstructionId() + 2); |
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354 if (optimalSplitPos == loopBlock.lastLirInstructionId() + 2) { |
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355 optimalSplitPos = -1; |
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356 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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357 TTY.println(" loop optimization not necessary"); |
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358 } |
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359 } else { |
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360 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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361 TTY.println(" loop optimization successful"); |
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362 } |
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363 } |
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364 } |
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365 } |
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366 |
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367 if (optimalSplitPos == -1) { |
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368 // not calculated by loop optimization |
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369 optimalSplitPos = findOptimalSplitPos(minBlock, maxBlock, maxSplitPos); |
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370 } |
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371 } |
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372 } |
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373 } |
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374 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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375 TTY.println(" optimal split position: %d", optimalSplitPos); |
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376 } |
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377 |
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378 return optimalSplitPos; |
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379 } |
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380 |
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381 // split an interval at the optimal position between minSplitPos and |
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382 // maxSplitPos in two parts: |
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383 // 1) the left part has already a location assigned |
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384 // 2) the right part is sorted into to the unhandled-list |
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385 void splitBeforeUsage(Interval interval, int minSplitPos, int maxSplitPos) { |
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386 if (GraalOptions.TraceLinearScanLevel >= 2) { |
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387 TTY.println("----- splitting interval: "); |
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388 } |
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389 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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390 TTY.println(interval.logString(allocator)); |
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391 } |
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392 if (GraalOptions.TraceLinearScanLevel >= 2) { |
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393 TTY.println(" between %d and %d", minSplitPos, maxSplitPos); |
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394 } |
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395 |
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396 assert interval.from() < minSplitPos : "cannot split at start of interval"; |
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397 assert currentPosition < minSplitPos : "cannot split before current position"; |
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398 assert minSplitPos <= maxSplitPos : "invalid order"; |
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399 assert maxSplitPos <= interval.to() : "cannot split after end of interval"; |
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400 |
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401 int optimalSplitPos = findOptimalSplitPos(interval, minSplitPos, maxSplitPos, true); |
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402 |
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403 assert minSplitPos <= optimalSplitPos && optimalSplitPos <= maxSplitPos : "out of range"; |
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404 assert optimalSplitPos <= interval.to() : "cannot split after end of interval"; |
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405 assert optimalSplitPos > interval.from() : "cannot split at start of interval"; |
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406 |
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407 if (optimalSplitPos == interval.to() && interval.nextUsage(RegisterPriority.MustHaveRegister, minSplitPos) == Integer.MAX_VALUE) { |
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408 // the split position would be just before the end of the interval |
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409 // . no split at all necessary |
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410 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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411 TTY.println(" no split necessary because optimal split position is at end of interval"); |
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412 } |
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413 return; |
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414 } |
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415 |
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416 // must calculate this before the actual split is performed and before split position is moved to odd opId |
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417 boolean moveNecessary = !allocator.isBlockBegin(optimalSplitPos) && !interval.hasHoleBetween(optimalSplitPos - 1, optimalSplitPos); |
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418 |
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419 if (!allocator.isBlockBegin(optimalSplitPos)) { |
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420 // move position before actual instruction (odd opId) |
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421 optimalSplitPos = (optimalSplitPos - 1) | 1; |
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422 } |
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423 |
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424 if (GraalOptions.TraceLinearScanLevel >= 4) { |
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425 TTY.println(" splitting at position %d", optimalSplitPos); |
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426 } |
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427 assert allocator.isBlockBegin(optimalSplitPos) || (optimalSplitPos % 2 == 1) : "split pos must be odd when not on block boundary"; |
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428 assert !allocator.isBlockBegin(optimalSplitPos) || (optimalSplitPos % 2 == 0) : "split pos must be even on block boundary"; |
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429 |
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430 Interval splitPart = interval.split(optimalSplitPos, allocator); |
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431 |
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432 allocator.copyRegisterFlags(interval, splitPart); |
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433 splitPart.setInsertMoveWhenActivated(moveNecessary); |
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434 |
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435 assert splitPart.from() >= current.currentFrom() : "cannot append new interval before current walk position"; |
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|
436 unhandledLists.addToListSortedByStartAndUsePositions(RegisterBinding.Any, splitPart); |
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|
437 |
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|
438 if (GraalOptions.TraceLinearScanLevel >= 2) { |
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|
439 TTY.println(" split interval in two parts (insertMoveWhenActivated: %b)", moveNecessary); |
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|
440 } |
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|
441 if (GraalOptions.TraceLinearScanLevel >= 2) { |
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442 TTY.print(" "); |
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|
443 TTY.println(interval.logString(allocator)); |
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|
444 TTY.print(" "); |
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|
445 TTY.println(splitPart.logString(allocator)); |
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diff
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|
446 } |
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diff
changeset
|
447 } |
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diff
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|
448 |
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|
449 // split an interval at the optimal position between minSplitPos and |
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diff
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|
450 // maxSplitPos in two parts: |
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diff
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|
451 // 1) the left part has already a location assigned |
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|
452 // 2) the right part is always on the stack and therefore ignored in further processing |
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diff
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|
453 |
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diff
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|
454 void splitForSpilling(Interval interval) { |
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|
455 // calculate allowed range of splitting position |
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|
456 int maxSplitPos = currentPosition; |
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|
457 int minSplitPos = Math.max(interval.previousUsage(RegisterPriority.ShouldHaveRegister, maxSplitPos) + 1, interval.from()); |
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|
458 |
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|
459 if (GraalOptions.TraceLinearScanLevel >= 2) { |
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diff
changeset
|
460 TTY.print("----- splitting and spilling interval: "); |
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|
461 TTY.println(interval.logString(allocator)); |
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|
462 TTY.println(" between %d and %d", minSplitPos, maxSplitPos); |
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|
463 } |
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|
464 |
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|
465 assert interval.state == State.Active : "why spill interval that is not active?"; |
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|
466 assert interval.from() <= minSplitPos : "cannot split before start of interval"; |
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|
467 assert minSplitPos <= maxSplitPos : "invalid order"; |
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|
468 assert maxSplitPos < interval.to() : "cannot split at end end of interval"; |
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diff
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|
469 assert currentPosition < interval.to() : "interval must not end before current position"; |
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diff
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|
470 |
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diff
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|
471 if (minSplitPos == interval.from()) { |
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diff
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|
472 // the whole interval is never used, so spill it entirely to memory |
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parents:
diff
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|
473 if (GraalOptions.TraceLinearScanLevel >= 2) { |
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diff
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|
474 TTY.println(" spilling entire interval because split pos is at beginning of interval"); |
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parents:
diff
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|
475 TTY.println(" use positions: " + interval.usePosList().size()); |
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|
476 } |
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parents:
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|
477 assert interval.firstUsage(RegisterPriority.ShouldHaveRegister) > currentPosition : "interval must not have use position before currentPosition"; |
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parents:
diff
changeset
|
478 |
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|
479 allocator.assignSpillSlot(interval); |
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parents:
diff
changeset
|
480 allocator.changeSpillState(interval, minSplitPos); |
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parents:
diff
changeset
|
481 |
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diff
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|
482 // Also kick parent intervals out of register to memory when they have no use |
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parents:
diff
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|
483 // position. This avoids short interval in register surrounded by intervals in |
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parents:
diff
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|
484 // memory . avoid useless moves from memory to register and back |
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parents:
diff
changeset
|
485 Interval parent = interval; |
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parents:
diff
changeset
|
486 while (parent != null && parent.isSplitChild()) { |
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parents:
diff
changeset
|
487 parent = parent.getSplitChildBeforeOpId(parent.from()); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
488 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
489 if (parent.location().isRegister()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
490 if (parent.firstUsage(RegisterPriority.ShouldHaveRegister) == Integer.MAX_VALUE) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
491 // parent is never used, so kick it out of its assigned register |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
492 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
493 TTY.println(" kicking out interval %d out of its register because it is never used", parent.operandNumber); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
494 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
495 allocator.assignSpillSlot(parent); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
496 } else { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
497 // do not go further back because the register is actually used by the interval |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
498 parent = null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
499 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
500 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
501 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
502 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
503 } else { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
504 // search optimal split pos, split interval and spill only the right hand part |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
505 int optimalSplitPos = findOptimalSplitPos(interval, minSplitPos, maxSplitPos, false); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
506 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
507 assert minSplitPos <= optimalSplitPos && optimalSplitPos <= maxSplitPos : "out of range"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
508 assert optimalSplitPos < interval.to() : "cannot split at end of interval"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
509 assert optimalSplitPos >= interval.from() : "cannot split before start of interval"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
510 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
511 if (!allocator.isBlockBegin(optimalSplitPos)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
512 // move position before actual instruction (odd opId) |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
513 optimalSplitPos = (optimalSplitPos - 1) | 1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
514 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
515 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
516 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
517 TTY.println(" splitting at position %d", optimalSplitPos); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
518 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
519 assert allocator.isBlockBegin(optimalSplitPos) || (optimalSplitPos % 2 == 1) : "split pos must be odd when not on block boundary"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
520 assert !allocator.isBlockBegin(optimalSplitPos) || (optimalSplitPos % 2 == 0) : "split pos must be even on block boundary"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
521 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
522 Interval spilledPart = interval.split(optimalSplitPos, allocator); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
523 allocator.assignSpillSlot(spilledPart); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
524 allocator.changeSpillState(spilledPart, optimalSplitPos); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
525 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
526 if (!allocator.isBlockBegin(optimalSplitPos)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
527 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
528 TTY.println(" inserting move from interval %d to %d", interval.operandNumber, spilledPart.operandNumber); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
529 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
530 insertMove(optimalSplitPos, interval, spilledPart); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
531 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
532 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
533 // the currentSplitChild is needed later when moves are inserted for reloading |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
534 assert spilledPart.currentSplitChild() == interval : "overwriting wrong currentSplitChild"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
535 spilledPart.makeCurrentSplitChild(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
536 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
537 if (GraalOptions.TraceLinearScanLevel >= 2) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
538 TTY.println(" split interval in two parts"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
539 TTY.print(" "); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
540 TTY.println(interval.logString(allocator)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
541 TTY.print(" "); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
542 TTY.println(spilledPart.logString(allocator)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
543 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
544 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
545 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
546 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
547 void splitStackInterval(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
548 int minSplitPos = currentPosition + 1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
549 int maxSplitPos = Math.min(interval.firstUsage(RegisterPriority.ShouldHaveRegister), interval.to()); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
550 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
551 splitBeforeUsage(interval, minSplitPos, maxSplitPos); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
552 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
553 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
554 void splitWhenPartialRegisterAvailable(Interval interval, int registerAvailableUntil) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
555 int minSplitPos = Math.max(interval.previousUsage(RegisterPriority.ShouldHaveRegister, registerAvailableUntil), interval.from() + 1); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
556 splitBeforeUsage(interval, minSplitPos, registerAvailableUntil); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
557 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
558 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
559 void splitAndSpillInterval(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
560 assert interval.state == State.Active || interval.state == State.Inactive : "other states not allowed"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
561 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
562 int currentPos = currentPosition; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
563 if (interval.state == State.Inactive) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
564 // the interval is currently inactive, so no spill slot is needed for now. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
565 // when the split part is activated, the interval has a new chance to get a register, |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
566 // so in the best case no stack slot is necessary |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
567 assert interval.hasHoleBetween(currentPos - 1, currentPos + 1) : "interval can not be inactive otherwise"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
568 splitBeforeUsage(interval, currentPos + 1, currentPos + 1); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
569 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
570 } else { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
571 // search the position where the interval must have a register and split |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
572 // at the optimal position before. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
573 // The new created part is added to the unhandled list and will get a register |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
574 // when it is activated |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
575 int minSplitPos = currentPos + 1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
576 int maxSplitPos = Math.min(interval.nextUsage(RegisterPriority.MustHaveRegister, minSplitPos), interval.to()); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
577 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
578 splitBeforeUsage(interval, minSplitPos, maxSplitPos); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
579 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
580 assert interval.nextUsage(RegisterPriority.MustHaveRegister, currentPos) == Integer.MAX_VALUE : "the remaining part is spilled to stack and therefore has no register"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
581 splitForSpilling(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
582 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
583 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
584 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
585 boolean allocFreeRegister(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
586 if (GraalOptions.TraceLinearScanLevel >= 2) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
587 TTY.println("trying to find free register for " + interval.logString(allocator)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
588 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
589 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
590 initUseLists(true); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
591 freeExcludeActiveFixed(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
592 freeExcludeActiveAny(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
593 freeCollectInactiveFixed(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
594 freeCollectInactiveAny(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
595 // freeCollectUnhandled(fixedKind, cur); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
596 assert unhandledLists.get(RegisterBinding.Fixed) == Interval.EndMarker : "must not have unhandled fixed intervals because all fixed intervals have a use at position 0"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
597 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
598 // usePos contains the start of the next interval that has this register assigned |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
599 // (either as a fixed register or a normal allocated register in the past) |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
600 // only intervals overlapping with cur are processed, non-overlapping invervals can be ignored safely |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
601 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
602 TTY.println(" state of registers:"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
603 for (CiRegister register : availableRegs) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
604 int i = register.number; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
605 TTY.println(" reg %d: usePos: %d", register.number, usePos[i]); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
606 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
607 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
608 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
609 CiRegister hint = null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
610 Interval locationHint = interval.locationHint(true, allocator); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
611 if (locationHint != null && locationHint.location() != null && locationHint.location().isRegister()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
612 hint = locationHint.location().asRegister(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
613 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
614 TTY.println(" hint register %d from interval %s", hint.number, locationHint.logString(allocator)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
615 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
616 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
617 assert interval.location() == null : "register already assigned to interval"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
618 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
619 // the register must be free at least until this position |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
620 int regNeededUntil = interval.from() + 1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
621 int intervalTo = interval.to(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
622 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
623 boolean needSplit = false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
624 int splitPos = -1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
625 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
626 CiRegister reg = null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
627 CiRegister minFullReg = null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
628 CiRegister maxPartialReg = null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
629 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
630 for (int i = 0; i < availableRegs.length; ++i) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
631 CiRegister availableReg = availableRegs[i]; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
632 int number = availableReg.number; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
633 if (usePos[number] >= intervalTo) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
634 // this register is free for the full interval |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
635 if (minFullReg == null || availableReg == hint || (usePos[number] < usePos[minFullReg.number] && minFullReg != hint)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
636 minFullReg = availableReg; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
637 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
638 } else if (usePos[number] > regNeededUntil) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
639 // this register is at least free until regNeededUntil |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
640 if (maxPartialReg == null || availableReg == hint || (usePos[number] > usePos[maxPartialReg.number] && maxPartialReg != hint)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
641 maxPartialReg = availableReg; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
642 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
643 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
644 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
645 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
646 if (minFullReg != null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
647 reg = minFullReg; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
648 } else if (maxPartialReg != null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
649 needSplit = true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
650 reg = maxPartialReg; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
651 } else { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
652 return false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
653 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
654 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
655 splitPos = usePos[reg.number]; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
656 interval.assignLocation(reg.asValue(interval.kind())); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
657 if (GraalOptions.TraceLinearScanLevel >= 2) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
658 TTY.println("selected register %d", reg.number); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
659 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
660 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
661 assert splitPos > 0 : "invalid splitPos"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
662 if (needSplit) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
663 // register not available for full interval, so split it |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
664 splitWhenPartialRegisterAvailable(interval, splitPos); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
665 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
666 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
667 // only return true if interval is completely assigned |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
668 return true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
669 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
670 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
671 CiRegister findLockedRegister(int regNeededUntil, int intervalTo, CiValue ignoreReg, boolean[] needSplit) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
672 int maxReg = -1; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
673 CiRegister ignore = ignoreReg.isRegister() ? ignoreReg.asRegister() : null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
674 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
675 for (CiRegister reg : availableRegs) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
676 int i = reg.number; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
677 if (reg == ignore) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
678 // this register must be ignored |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
679 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
680 } else if (usePos[i] > regNeededUntil) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
681 if (maxReg == -1 || (usePos[i] > usePos[maxReg])) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
682 maxReg = i; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
683 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
684 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
685 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
686 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
687 if (maxReg != -1) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
688 if (blockPos[maxReg] <= intervalTo) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
689 needSplit[0] = true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
690 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
691 return availableRegs[maxReg]; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
692 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
693 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
694 return null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
695 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
696 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
697 void splitAndSpillIntersectingIntervals(CiRegister reg) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
698 assert reg != null : "no register assigned"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
699 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
700 for (int i = 0; i < spillIntervals[reg.number].size(); i++) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
701 Interval interval = spillIntervals[reg.number].get(i); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
702 removeFromList(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
703 splitAndSpillInterval(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
704 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
705 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
706 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
707 // Split an Interval and spill it to memory so that cur can be placed in a register |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
708 void allocLockedRegister(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
709 if (GraalOptions.TraceLinearScanLevel >= 2) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
710 TTY.println("need to split and spill to get register for " + interval.logString(allocator)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
711 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
712 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
713 // collect current usage of registers |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
714 initUseLists(false); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
715 spillExcludeActiveFixed(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
716 // spillBlockUnhandledFixed(cur); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
717 assert unhandledLists.get(RegisterBinding.Fixed) == Interval.EndMarker : "must not have unhandled fixed intervals because all fixed intervals have a use at position 0"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
718 spillBlockInactiveFixed(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
719 spillCollectActiveAny(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
720 spillCollectInactiveAny(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
721 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
722 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
723 TTY.println(" state of registers:"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
724 for (CiRegister reg : availableRegs) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
725 int i = reg.number; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
726 TTY.print(" reg %d: usePos: %d, blockPos: %d, intervals: ", i, usePos[i], blockPos[i]); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
727 for (int j = 0; j < spillIntervals[i].size(); j++) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
728 TTY.print("%d ", spillIntervals[i].get(j).operandNumber); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
729 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
730 TTY.println(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
731 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
732 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
733 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
734 // the register must be free at least until this position |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
735 int firstUsage = interval.firstUsage(RegisterPriority.MustHaveRegister); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
736 int regNeededUntil = Math.min(firstUsage, interval.from() + 1); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
737 int intervalTo = interval.to(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
738 assert regNeededUntil > 0 && regNeededUntil < Integer.MAX_VALUE : "interval has no use"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
739 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
740 CiRegister reg = null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
741 CiRegister ignore = interval.location() != null && interval.location().isRegister() ? interval.location().asRegister() : null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
742 for (CiRegister availableReg : availableRegs) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
743 int number = availableReg.number; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
744 if (availableReg == ignore) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
745 // this register must be ignored |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
746 } else if (usePos[number] > regNeededUntil) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
747 if (reg == null || (usePos[number] > usePos[reg.number])) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
748 reg = availableReg; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
749 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
750 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
751 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
752 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
753 if (reg == null || usePos[reg.number] <= firstUsage) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
754 // the first use of cur is later than the spilling position -> spill cur |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
755 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
756 TTY.println("able to spill current interval. firstUsage(register): %d, usePos: %d", firstUsage, reg == null ? 0 : usePos[reg.number]); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
757 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
758 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
759 if (firstUsage <= interval.from() + 1) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
760 assert false : "cannot spill interval that is used in first instruction (possible reason: no register found) firstUsage=" + firstUsage + ", interval.from()=" + interval.from(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
761 // assign a reasonable register and do a bailout in product mode to avoid errors |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
762 allocator.assignSpillSlot(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
763 throw new CiBailout("LinearScan: no register found"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
764 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
765 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
766 splitAndSpillInterval(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
767 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
768 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
769 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
770 boolean needSplit = blockPos[reg.number] <= intervalTo; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
771 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
772 int splitPos = blockPos[reg.number]; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
773 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
774 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
775 TTY.println("decided to use register %d", reg.number); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
776 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
777 assert splitPos > 0 : "invalid splitPos"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
778 assert needSplit || splitPos > interval.from() : "splitting interval at from"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
779 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
780 interval.assignLocation(reg.asValue(interval.kind())); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
781 if (needSplit) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
782 // register not available for full interval : so split it |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
783 splitWhenPartialRegisterAvailable(interval, splitPos); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
784 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
785 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
786 // perform splitting and spilling for all affected intervals |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
787 splitAndSpillIntersectingIntervals(reg); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
788 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
789 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
790 boolean noAllocationPossible(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
791 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
792 if (compilation.compiler.target.arch.isX86()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
793 // fast calculation of intervals that can never get a register because the |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
794 // the next instruction is a call that blocks all registers |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
795 // Note: this does not work if callee-saved registers are available (e.g. on Sparc) |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
796 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
797 // check if this interval is the result of a split operation |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
798 // (an interval got a register until this position) |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
799 int pos = interval.from(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
800 if (isOdd(pos)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
801 // the current instruction is a call that blocks all registers |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
802 if (pos < allocator.maxOpId() && allocator.hasCall(pos + 1) && interval.to() > pos + 1) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
803 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
804 TTY.println(" free register cannot be available because all registers blocked by following call"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
805 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
806 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
807 // safety check that there is really no register available |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
808 assert !allocFreeRegister(interval) : "found a register for this interval"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
809 return true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
810 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
811 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
812 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
813 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
814 return false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
815 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
816 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
817 void initVarsForAlloc(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
818 EnumMap<RegisterFlag, CiRegister[]> categorizedRegs = allocator.compilation.registerConfig.getCategorizedAllocatableRegisters(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
819 if (allocator.operands.mustBeByteRegister(interval.operand)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
820 assert interval.kind() != CiKind.Float && interval.kind() != CiKind.Double : "cpu regs only"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
821 availableRegs = categorizedRegs.get(RegisterFlag.Byte); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
822 } else if (interval.kind() == CiKind.Float || interval.kind() == CiKind.Double) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
823 availableRegs = categorizedRegs.get(RegisterFlag.FPU); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
824 } else { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
825 availableRegs = categorizedRegs.get(RegisterFlag.CPU); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
826 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
827 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
828 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
829 boolean isMove(LIRInstruction op, Interval from, Interval to) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
830 if (op.code != StandardOpcode.MOVE) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
831 return false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
832 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
833 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
834 CiValue input = op.input(0); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
835 CiValue result = op.result(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
836 return input.isVariable() && result.isVariable() && input == from.operand && result == to.operand; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
837 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
838 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
839 // optimization (especially for phi functions of nested loops): |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
840 // assign same spill slot to non-intersecting intervals |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
841 void combineSpilledIntervals(Interval interval) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
842 if (interval.isSplitChild()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
843 // optimization is only suitable for split parents |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
844 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
845 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
846 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
847 Interval registerHint = interval.locationHint(false, allocator); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
848 if (registerHint == null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
849 // cur is not the target of a move : otherwise registerHint would be set |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
850 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
851 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
852 assert registerHint.isSplitParent() : "register hint must be split parent"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
853 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
854 if (interval.spillState() != SpillState.NoOptimization || registerHint.spillState() != SpillState.NoOptimization) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
855 // combining the stack slots for intervals where spill move optimization is applied |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
856 // is not benefitial and would cause problems |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
857 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
858 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
859 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
860 int beginPos = interval.from(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
861 int endPos = interval.to(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
862 if (endPos > allocator.maxOpId() || isOdd(beginPos) || isOdd(endPos)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
863 // safety check that lirOpWithId is allowed |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
864 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
865 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
866 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
867 if (!isMove(allocator.instructionForId(beginPos), registerHint, interval) || !isMove(allocator.instructionForId(endPos), interval, registerHint)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
868 // cur and registerHint are not connected with two moves |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
869 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
870 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
871 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
872 Interval beginHint = registerHint.getSplitChildAtOpId(beginPos, LIRInstruction.OperandMode.Input, allocator); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
873 Interval endHint = registerHint.getSplitChildAtOpId(endPos, LIRInstruction.OperandMode.Output, allocator); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
874 if (beginHint == endHint || beginHint.to() != beginPos || endHint.from() != endPos) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
875 // registerHint must be split : otherwise the re-writing of use positions does not work |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
876 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
877 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
878 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
879 assert beginHint.location() != null : "must have register assigned"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
880 assert endHint.location() == null : "must not have register assigned"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
881 assert interval.firstUsage(RegisterPriority.MustHaveRegister) == beginPos : "must have use position at begin of interval because of move"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
882 assert endHint.firstUsage(RegisterPriority.MustHaveRegister) == endPos : "must have use position at begin of interval because of move"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
883 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
884 if (beginHint.location().isRegister()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
885 // registerHint is not spilled at beginPos : so it would not be benefitial to immediately spill cur |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
886 return; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
887 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
888 assert registerHint.spillSlot() != null : "must be set when part of interval was spilled"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
889 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
890 // modify intervals such that cur gets the same stack slot as registerHint |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
891 // delete use positions to prevent the intervals to get a register at beginning |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
892 interval.setSpillSlot(registerHint.spillSlot()); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
893 interval.removeFirstUsePos(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
894 endHint.removeFirstUsePos(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
895 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
896 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
897 // allocate a physical register or memory location to an interval |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
898 @Override |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
899 boolean activateCurrent() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
900 Interval interval = current; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
901 boolean result = true; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
902 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
903 if (GraalOptions.TraceLinearScanLevel >= 2) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
904 TTY.println("+++++ activating interval " + interval.logString(allocator)); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
905 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
906 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
907 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
908 TTY.println(" splitParent: %s, insertMoveWhenActivated: %b", interval.splitParent().operandNumber, interval.insertMoveWhenActivated()); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
909 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
910 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
911 final CiValue operand = interval.operand; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
912 if (interval.location() != null && interval.location().isStackSlot()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
913 // activating an interval that has a stack slot assigned . split it at first use position |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
914 // used for method parameters |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
915 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
916 TTY.println(" interval has spill slot assigned (method parameter) . split it before first use"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
917 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
918 splitStackInterval(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
919 result = false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
920 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
921 } else { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
922 if (operand.isVariable() && allocator.operands.mustStartInMemory((CiVariable) operand)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
923 assert interval.location() == null : "register already assigned"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
924 allocator.assignSpillSlot(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
925 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
926 if (!allocator.operands.mustStayInMemory((CiVariable) operand)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
927 // activating an interval that must start in a stack slot but may get a register later |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
928 // used for lirRoundfp: rounding is done by store to stack and reload later |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
929 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
930 TTY.println(" interval must start in stack slot . split it before first use"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
931 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
932 splitStackInterval(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
933 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
934 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
935 result = false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
936 } else if (interval.location() == null) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
937 // interval has not assigned register . normal allocation |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
938 // (this is the normal case for most intervals) |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
939 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
940 TTY.println(" normal allocation of register"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
941 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
942 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
943 // assign same spill slot to non-intersecting intervals |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
944 combineSpilledIntervals(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
945 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
946 initVarsForAlloc(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
947 if (noAllocationPossible(interval) || !allocFreeRegister(interval)) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
948 // no empty register available. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
949 // split and spill another interval so that this interval gets a register |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
950 allocLockedRegister(interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
951 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
952 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
953 // spilled intervals need not be move to active-list |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
954 if (!interval.location().isRegister()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
955 result = false; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
956 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
957 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
958 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
959 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
960 // load spilled values that become active from stack slot to register |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
961 if (interval.insertMoveWhenActivated()) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
962 assert interval.isSplitChild(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
963 assert interval.currentSplitChild() != null; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
964 assert interval.currentSplitChild().operand != operand : "cannot insert move between same interval"; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
965 if (GraalOptions.TraceLinearScanLevel >= 4) { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
966 TTY.println("Inserting move from interval %d to %d because insertMoveWhenActivated is set", interval.currentSplitChild().operandNumber, interval.operandNumber); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
967 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
968 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
969 insertMove(interval.from(), interval.currentSplitChild(), interval); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
970 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
971 interval.makeCurrentSplitChild(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
972 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
973 return result; // true = interval is moved to active list |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
974 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
975 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
976 public void finishAllocation() { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
977 // must be called when all intervals are allocated |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
978 moveResolver.resolveAndAppendMoves(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
979 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
980 } |