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annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/alloc/simple/AssignRegisters.java @ 4435:57cb8ec5f6bb
Restructure block and control flow graph data structures
author | Christian Wimmer <Christian.Wimmer@Oracle.com> |
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date | Fri, 03 Feb 2012 18:56:09 -0800 |
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1 /* |
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.max.graal.alloc.simple; |
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24 |
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25 import static com.oracle.max.graal.alloc.util.ValueUtil.*; |
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26 |
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27 import com.oracle.max.cri.ci.*; |
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28 import com.oracle.max.criutils.*; |
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29 import com.oracle.max.graal.alloc.util.*; |
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30 import com.oracle.max.graal.compiler.*; |
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31 import com.oracle.max.graal.compiler.cfg.*; |
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32 import com.oracle.max.graal.compiler.lir.*; |
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33 import com.oracle.max.graal.compiler.lir.LIRInstruction.ValueProcedure; |
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34 |
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35 public abstract class AssignRegisters { |
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36 public final LIR lir; |
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37 public final FrameMap frameMap; |
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38 |
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39 public AssignRegisters(LIR lir, FrameMap frameMap) { |
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40 this.lir = lir; |
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41 this.frameMap = frameMap; |
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42 } |
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43 |
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44 private CiBitMap curRegisterRefMap; |
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45 private CiBitMap curFrameRefMap; |
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46 |
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47 public void execute() { |
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48 ValueProcedure useProc = new ValueProcedure() { @Override public CiValue doValue(CiValue value) { return use(value); } }; |
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49 ValueProcedure defProc = new ValueProcedure() { @Override public CiValue doValue(CiValue value) { return def(value); } }; |
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50 ValueProcedure setReferenceProc = new ValueProcedure() { @Override public CiValue doValue(CiValue value) { return setReference(value); } }; |
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51 |
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52 assert trace("==== start assign registers ===="); |
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53 for (int i = lir.linearScanOrder().size() - 1; i >= 0; i--) { |
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54 Block block = lir.linearScanOrder().get(i); |
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55 assert trace("start block %s", block); |
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56 assert block.phis == null : "Register assignment must run after phi functions have been replaced by moves"; |
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57 |
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58 curRegisterRefMap = frameMap.initRegisterRefMap(); |
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59 curFrameRefMap = frameMap.initFrameRefMap(); |
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60 |
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61 // Put all values live at the end of the block into the reference map. |
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62 locationsForBlockEnd(block).forEachLocation(setReferenceProc); |
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63 |
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64 for (int j = block.lir.size() - 1; j >= 0; j--) { |
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65 LIRInstruction op = block.lir.get(j); |
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66 assert trace(" op %d %s", op.id(), op); |
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67 |
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68 op.forEachOutput(defProc); |
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69 op.forEachTemp(defProc); |
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70 op.forEachState(useProc); |
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71 op.forEachAlive(useProc); |
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72 |
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73 if (op.info != null) { |
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74 assert trace(" registerRefMap: %s frameRefMap: %s", curRegisterRefMap, curFrameRefMap); |
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75 op.info.finish(new CiBitMap(curRegisterRefMap), new CiBitMap(curFrameRefMap), frameMap); |
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76 |
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77 if (op instanceof LIRXirInstruction) { |
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78 LIRXirInstruction xir = (LIRXirInstruction) op; |
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79 if (xir.infoAfter != null) { |
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80 xir.infoAfter.finish(new CiBitMap(curRegisterRefMap), new CiBitMap(curFrameRefMap), frameMap); |
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81 } |
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82 } |
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83 } |
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84 |
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85 // Process input operands after assigning the reference map, so that input operands that are used |
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86 // for the last time at this instruction are not part of the reference map. |
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87 op.forEachInput(useProc); |
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88 } |
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89 assert trace("end block %s", block); |
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90 } |
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91 assert trace("==== end assign registers ===="); |
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92 } |
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93 |
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94 private CiValue use(CiValue value) { |
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95 assert trace(" use %s", value); |
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96 if (isLocation(value)) { |
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97 CiValue location = asLocation(value).location; |
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98 frameMap.setReference(location, curRegisterRefMap, curFrameRefMap); |
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99 return location; |
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100 } else { |
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101 frameMap.setReference(value, curRegisterRefMap, curFrameRefMap); |
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102 return value; |
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103 } |
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104 } |
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105 |
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106 private CiValue def(CiValue value) { |
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107 assert trace(" def %s", value); |
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108 if (isLocation(value)) { |
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109 CiValue location = asLocation(value).location; |
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110 frameMap.clearReference(location, curRegisterRefMap, curFrameRefMap); |
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111 return location; |
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112 } else { |
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113 frameMap.clearReference(value, curRegisterRefMap, curFrameRefMap); |
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114 return value; |
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115 } |
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116 } |
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117 |
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118 private CiValue setReference(CiValue value) { |
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119 assert trace(" setReference %s", value); |
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120 frameMap.setReference(asLocation(value).location, curRegisterRefMap, curFrameRefMap); |
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121 return value; |
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122 } |
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123 |
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124 protected abstract LocationMap locationsForBlockEnd(Block block); |
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125 |
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126 private static boolean trace(String format, Object...args) { |
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127 if (GraalOptions.TraceRegisterAllocation) { |
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128 TTY.println(format, args); |
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129 } |
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130 return true; |
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131 } |
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132 } |