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annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/LIRDebugInfo.java @ 5542:e318468952f5

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Remove CiBitMap and replace usages with java.util.BitSet.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 09 Jun 2012 17:13:21 +0200
parents bc647d8b0080
children b6617d13ea44
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1 /*
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2 * Copyright (c) 2009, 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.graal.lir;
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24
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25 import static com.oracle.graal.api.code.CiValueUtil.*;
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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.graal.api.code.*;
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30 import com.oracle.graal.api.meta.*;
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31 import com.oracle.graal.lir.LIRInstruction.OperandFlag;
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32 import com.oracle.graal.lir.LIRInstruction.OperandMode;
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33 import com.oracle.graal.lir.LIRInstruction.ValueProcedure;
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34
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35 /**
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36 * This class represents garbage collection and deoptimization information attached to a LIR instruction.
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37 */
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38 public class LIRDebugInfo {
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39 public final CiFrame topFrame;
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40 private final CiVirtualObject[] virtualObjects;
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41 private final List<CiStackSlot> pointerSlots;
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42 public final LabelRef exceptionEdge;
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43 private CiDebugInfo debugInfo;
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44
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45 public LIRDebugInfo(CiFrame topFrame, CiVirtualObject[] virtualObjects, List<CiStackSlot> pointerSlots, LabelRef exceptionEdge) {
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46 this.topFrame = topFrame;
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47 this.virtualObjects = virtualObjects;
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48 this.pointerSlots = pointerSlots;
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49 this.exceptionEdge = exceptionEdge;
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50 }
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51
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52 public boolean hasDebugInfo() {
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53 return debugInfo != null;
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54 }
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55
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56 public CiDebugInfo debugInfo() {
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57 assert debugInfo != null : "debug info not allocated yet";
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58 return debugInfo;
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59 }
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60
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61 /**
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62 * Iterates the frame state and calls the {@link ValueProcedure} for every variable.
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63 *
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64 * @param proc The procedure called for variables.
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65 */
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66 public void forEachState(ValueProcedure proc) {
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67 for (CiFrame cur = topFrame; cur != null; cur = cur.caller()) {
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68 processValues(cur.values, proc);
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69 }
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70 if (virtualObjects != null) {
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71 for (CiVirtualObject obj : virtualObjects) {
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72 processValues(obj.values(), proc);
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73 }
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74 }
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75 }
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76
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77 /**
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78 * We filter out constant and illegal values ourself before calling the procedure, so {@link OperandFlag#Constant} and {@link OperandFlag#Illegal} need not be set.
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79 */
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80 private static final EnumSet<OperandFlag> STATE_FLAGS = EnumSet.of(OperandFlag.Register, OperandFlag.Stack);
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81
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82 private void processValues(Value[] values, ValueProcedure proc) {
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83 for (int i = 0; i < values.length; i++) {
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84 Value value = values[i];
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85 if (value instanceof CiMonitorValue) {
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86 CiMonitorValue monitor = (CiMonitorValue) value;
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87 if (processed(monitor.owner)) {
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88 monitor.owner = proc.doValue(monitor.owner, OperandMode.Alive, STATE_FLAGS);
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89 }
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90
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91 } else if (processed(value)) {
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92 values[i] = proc.doValue(value, OperandMode.Alive, STATE_FLAGS);
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93 }
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94 }
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95 }
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96
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97 private boolean processed(Value value) {
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98 if (isIllegal(value)) {
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99 // Ignore dead local variables.
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100 return false;
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101 } else if (isConstant(value)) {
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102 // Ignore constants, the register allocator does not need to see them.
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103 return false;
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104 } else if (isVirtualObject(value)) {
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105 assert Arrays.asList(virtualObjects).contains(value);
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106 return false;
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107 } else {
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108 return true;
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109 }
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110 }
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111
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112
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113 public void finish(BitSet registerRefMap, BitSet frameRefMap, FrameMap frameMap) {
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114 debugInfo = new CiDebugInfo(topFrame, registerRefMap, frameRefMap);
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115
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116 // Add additional stack slots for outgoing method parameters.
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117 if (pointerSlots != null) {
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118 for (CiStackSlot v : pointerSlots) {
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119 frameMap.setReference(v, registerRefMap, frameRefMap);
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120 }
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121 }
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122 }
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124
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125 @Override
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126 public String toString() {
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127 return debugInfo != null ? debugInfo.toString() : topFrame.toString();
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128 }
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129 }