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annotate graal/GraalCompiler/src/com/sun/c1x/lir/LIRDebugInfo.java @ 2805:c3f64b66fc78

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Towards removing the next pointer from Constant and ArithmeticOp
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Fri, 27 May 2011 19:57:56 +0200
parents c1ce2a53d6c3
children 1cd59ca9ac86
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1 /*
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2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.c1x.lir;
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24
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25 import com.sun.c1x.*;
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26 import com.sun.c1x.ir.*;
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27 import com.sun.c1x.value.*;
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28 import com.sun.cri.ci.*;
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29
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30 /**
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31 * This class represents debugging and deoptimization information attached to a LIR instruction.
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32 */
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33 public class LIRDebugInfo {
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34
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35 public abstract static class ValueLocator {
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36 public abstract CiValue getLocation(Value value);
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37 }
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38
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39 public final FrameState state;
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40 public final LIRBlock exceptionEdge;
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41 public CiDebugInfo debugInfo;
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42
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43 public LIRDebugInfo(FrameState state, LIRBlock exceptionEdge) {
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44 assert state != null;
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45 this.state = state;
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46 this.exceptionEdge = exceptionEdge;
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47 }
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48
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49 private LIRDebugInfo(LIRDebugInfo info) {
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50 this.state = info.state;
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51 this.exceptionEdge = info.exceptionEdge;
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52 }
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53
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54 public LIRDebugInfo copy() {
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55 return new LIRDebugInfo(this);
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56 }
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57
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58 public void setOop(CiValue location, C1XCompilation compilation, CiBitMap frameRefMap, CiBitMap regRefMap) {
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59 CiTarget target = compilation.target;
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60 if (location.isAddress()) {
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61 CiAddress stackLocation = (CiAddress) location;
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62 assert stackLocation.index.isIllegal();
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63 if (stackLocation.base == CiRegister.Frame.asValue()) {
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64 int offset = stackLocation.displacement;
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65 assert offset % target.wordSize == 0 : "must be aligned";
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66 int stackMapIndex = offset / target.wordSize;
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67 setBit(frameRefMap, stackMapIndex);
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68 }
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69 } else if (location.isStackSlot()) {
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70 CiStackSlot stackSlot = (CiStackSlot) location;
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71 assert !stackSlot.inCallerFrame();
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72 assert target.spillSlotSize == target.wordSize;
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73 setBit(frameRefMap, stackSlot.index());
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74 } else {
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75 assert location.isRegister() : "objects can only be in a register";
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76 CiRegisterValue registerLocation = (CiRegisterValue) location;
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77 int reg = registerLocation.reg.number;
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78 assert reg >= 0 : "object cannot be in non-object register " + registerLocation.reg;
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79 assert reg < target.arch.registerReferenceMapBitCount;
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80 setBit(regRefMap, reg);
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81 }
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82 }
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83
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84 public CiDebugInfo debugInfo() {
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85 assert debugInfo != null : "debug info not allocated yet";
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86 return debugInfo;
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87 }
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88
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89 public boolean hasDebugInfo() {
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90 return debugInfo != null;
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91 }
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92
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93 public static void setBit(CiBitMap refMap, int bit) {
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94 assert !refMap.get(bit) : "Ref map entry " + bit + " is already set.";
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95 refMap.set(bit);
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96 }
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97
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98 @Override
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99 public String toString() {
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100 return state.toString();
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101 }
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102 }