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annotate graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/alloc/simple/AssignRegisters.java @ 4524:dcc8f5c6f394

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Refactorings to prepare for LIR project splitting
author Christian Wimmer <Christian.Wimmer@Oracle.com>
date Wed, 08 Feb 2012 18:19:09 -0800
parents cf13124efdd9
children
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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.LocationUtil.*;
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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.graal.alloc.util.*;
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29 import com.oracle.max.graal.compiler.cfg.*;
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30 import com.oracle.max.graal.compiler.lir.*;
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31 import com.oracle.max.graal.compiler.lir.LIRInstruction.ValueProcedure;
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32 import com.oracle.max.graal.debug.*;
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33
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34 public abstract class AssignRegisters {
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35 public final LIR lir;
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36 public final FrameMap frameMap;
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37
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38 public AssignRegisters(LIR lir, FrameMap frameMap) {
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39 this.lir = lir;
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40 this.frameMap = frameMap;
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41 }
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42
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43 private CiBitMap curRegisterRefMap;
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44 private CiBitMap curFrameRefMap;
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45
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46 public void execute() {
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47 ValueProcedure useProc = new ValueProcedure() { @Override public CiValue doValue(CiValue value) { return use(value); } };
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48 ValueProcedure defProc = new ValueProcedure() { @Override public CiValue doValue(CiValue value) { return def(value); } };
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49 ValueProcedure setReferenceProc = new ValueProcedure() { @Override public CiValue doValue(CiValue value) { return setReference(value); } };
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50
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51 Debug.log("==== start assign registers ====");
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52 for (int i = lir.linearScanOrder().size() - 1; i >= 0; i--) {
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53 Block block = lir.linearScanOrder().get(i);
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54 Debug.log("start block %s", block);
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55
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56 curRegisterRefMap = frameMap.initRegisterRefMap();
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57 curFrameRefMap = frameMap.initFrameRefMap();
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58
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59 // Put all values live at the end of the block into the reference map.
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60 locationsForBlockEnd(block).forEachLocation(setReferenceProc);
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61
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62 for (int j = block.lir.size() - 1; j >= 0; j--) {
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63 LIRInstruction op = block.lir.get(j);
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64 Debug.log(" op %d %s", op.id(), op);
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65
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66 op.forEachOutput(defProc);
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67 op.forEachTemp(defProc);
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68 op.forEachState(useProc);
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69 op.forEachAlive(useProc);
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70
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71 if (op.info != null) {
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72 Debug.log(" registerRefMap: %s frameRefMap: %s", curRegisterRefMap, curFrameRefMap);
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73 op.info.finish(new CiBitMap(curRegisterRefMap), new CiBitMap(curFrameRefMap), frameMap);
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74
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75 if (op instanceof LIRXirInstruction) {
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76 LIRXirInstruction xir = (LIRXirInstruction) op;
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77 if (xir.infoAfter != null) {
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78 xir.infoAfter.finish(new CiBitMap(curRegisterRefMap), new CiBitMap(curFrameRefMap), frameMap);
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79 }
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80 }
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81 }
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82
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83 // Process input operands after assigning the reference map, so that input operands that are used
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84 // for the last time at this instruction are not part of the reference map.
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85 op.forEachInput(useProc);
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86 }
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87 Debug.log("end block %s", block);
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88 }
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89 Debug.log("==== end assign registers ====");
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90 }
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91
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92 private CiValue use(CiValue value) {
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93 Debug.log(" use %s", value);
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94 if (isLocation(value)) {
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95 CiValue location = asLocation(value).location;
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96 frameMap.setReference(location, curRegisterRefMap, curFrameRefMap);
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97 return location;
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98 } else {
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99 frameMap.setReference(value, curRegisterRefMap, curFrameRefMap);
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100 return value;
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101 }
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102 }
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103
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104 private CiValue def(CiValue value) {
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105 Debug.log(" def %s", value);
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106 if (isLocation(value)) {
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107 CiValue location = asLocation(value).location;
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108 frameMap.clearReference(location, curRegisterRefMap, curFrameRefMap);
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109 return location;
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110 } else {
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111 frameMap.clearReference(value, curRegisterRefMap, curFrameRefMap);
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112 return value;
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113 }
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114 }
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115
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116 private CiValue setReference(CiValue value) {
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117 Debug.log(" setReference %s", value);
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118 frameMap.setReference(asLocation(value).location, curRegisterRefMap, curFrameRefMap);
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119 return value;
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120 }
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121
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122 protected abstract LocationMap locationsForBlockEnd(Block block);
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123 }