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annotate lib/Object/RecordStreamer.cpp @ 120:1172e4bd9c6f

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update 4.0.0
author mir3636
date Fri, 25 Nov 2016 19:14:25 +0900
parents afa8332a0e37
children 803732b1fca8
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1 //===-- RecordStreamer.cpp - Record asm definde and used symbols ----------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "RecordStreamer.h"
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11 #include "llvm/MC/MCSymbol.h"
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12 using namespace llvm;
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13
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14 void RecordStreamer::markDefined(const MCSymbol &Symbol) {
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15 State &S = Symbols[Symbol.getName()];
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16 switch (S) {
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17 case DefinedGlobal:
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18 case Global:
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19 S = DefinedGlobal;
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20 break;
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21 case NeverSeen:
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22 case Defined:
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23 case Used:
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24 S = Defined;
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25 break;
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26 case DefinedWeak:
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27 break;
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28 case UndefinedWeak:
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29 S = DefinedWeak;
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30 }
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31 }
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32
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33 void RecordStreamer::markGlobal(const MCSymbol &Symbol,
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34 MCSymbolAttr Attribute) {
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35 State &S = Symbols[Symbol.getName()];
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36 switch (S) {
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37 case DefinedGlobal:
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38 case Defined:
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39 S = (Attribute == MCSA_Weak) ? DefinedWeak : DefinedGlobal;
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40 break;
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41
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42 case NeverSeen:
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43 case Global:
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44 case Used:
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45 S = (Attribute == MCSA_Weak) ? UndefinedWeak : Global;
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46 break;
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47 case UndefinedWeak:
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48 case DefinedWeak:
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49 break;
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50 }
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51 }
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52
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53 void RecordStreamer::markUsed(const MCSymbol &Symbol) {
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54 State &S = Symbols[Symbol.getName()];
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55 switch (S) {
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56 case DefinedGlobal:
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57 case Defined:
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58 case Global:
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59 case DefinedWeak:
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60 case UndefinedWeak:
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61 break;
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62
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63 case NeverSeen:
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64 case Used:
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65 S = Used;
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66 break;
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67 }
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68 }
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70 void RecordStreamer::visitUsedSymbol(const MCSymbol &Sym) { markUsed(Sym); }
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71
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72 RecordStreamer::const_iterator RecordStreamer::begin() {
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73 return Symbols.begin();
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74 }
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76 RecordStreamer::const_iterator RecordStreamer::end() { return Symbols.end(); }
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77
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78 RecordStreamer::RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
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79
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80 void RecordStreamer::EmitInstruction(const MCInst &Inst,
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81 const MCSubtargetInfo &STI) {
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82 MCStreamer::EmitInstruction(Inst, STI);
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83 }
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84
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85 void RecordStreamer::EmitLabel(MCSymbol *Symbol) {
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86 MCStreamer::EmitLabel(Symbol);
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87 markDefined(*Symbol);
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88 }
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89
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90 void RecordStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
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91 markDefined(*Symbol);
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92 MCStreamer::EmitAssignment(Symbol, Value);
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93 }
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94
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95 bool RecordStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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96 MCSymbolAttr Attribute) {
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97 if (Attribute == MCSA_Global || Attribute == MCSA_Weak)
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98 markGlobal(*Symbol, Attribute);
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99 if (Attribute == MCSA_LazyReference)
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100 markUsed(*Symbol);
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101 return true;
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102 }
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103
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104 void RecordStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
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105 uint64_t Size, unsigned ByteAlignment) {
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106 markDefined(*Symbol);
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107 }
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108
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109 void RecordStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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110 unsigned ByteAlignment) {
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111 markDefined(*Symbol);
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112 }