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annotate lib/Object/RecordStreamer.cpp @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents 1172e4bd9c6f
children
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1 //===-- RecordStreamer.cpp - Record asm defined 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
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13 using namespace llvm;
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14
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15 void RecordStreamer::markDefined(const MCSymbol &Symbol) {
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16 State &S = Symbols[Symbol.getName()];
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17 switch (S) {
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18 case DefinedGlobal:
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19 case Global:
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20 S = DefinedGlobal;
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21 break;
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22 case NeverSeen:
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23 case Defined:
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24 case Used:
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25 S = Defined;
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26 break;
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27 case DefinedWeak:
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28 break;
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29 case UndefinedWeak:
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30 S = DefinedWeak;
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31 }
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32 }
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33
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34 void RecordStreamer::markGlobal(const MCSymbol &Symbol,
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35 MCSymbolAttr Attribute) {
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36 State &S = Symbols[Symbol.getName()];
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37 switch (S) {
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38 case DefinedGlobal:
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39 case Defined:
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40 S = (Attribute == MCSA_Weak) ? DefinedWeak : DefinedGlobal;
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41 break;
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42
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43 case NeverSeen:
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44 case Global:
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45 case Used:
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46 S = (Attribute == MCSA_Weak) ? UndefinedWeak : Global;
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47 break;
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48 case UndefinedWeak:
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49 case DefinedWeak:
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50 break;
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51 }
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52 }
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53
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54 void RecordStreamer::markUsed(const MCSymbol &Symbol) {
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55 State &S = Symbols[Symbol.getName()];
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56 switch (S) {
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57 case DefinedGlobal:
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58 case Defined:
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59 case Global:
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60 case DefinedWeak:
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61 case UndefinedWeak:
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62 break;
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63
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64 case NeverSeen:
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65 case Used:
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66 S = Used;
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67 break;
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68 }
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69 }
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71 void RecordStreamer::visitUsedSymbol(const MCSymbol &Sym) { markUsed(Sym); }
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72
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73 RecordStreamer::RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
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74
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75 RecordStreamer::const_iterator RecordStreamer::begin() {
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76 return Symbols.begin();
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77 }
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79 RecordStreamer::const_iterator RecordStreamer::end() { return Symbols.end(); }
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81 void RecordStreamer::EmitInstruction(const MCInst &Inst,
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82 const MCSubtargetInfo &STI, bool) {
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83 MCStreamer::EmitInstruction(Inst, STI);
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84 }
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86 void RecordStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
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87 MCStreamer::EmitLabel(Symbol);
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88 markDefined(*Symbol);
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89 }
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90
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91 void RecordStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
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92 markDefined(*Symbol);
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93 MCStreamer::EmitAssignment(Symbol, Value);
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94 }
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96 bool RecordStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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97 MCSymbolAttr Attribute) {
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98 if (Attribute == MCSA_Global || Attribute == MCSA_Weak)
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99 markGlobal(*Symbol, Attribute);
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100 if (Attribute == MCSA_LazyReference)
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101 markUsed(*Symbol);
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102 return true;
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103 }
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104
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105 void RecordStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
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106 uint64_t Size, unsigned ByteAlignment) {
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107 markDefined(*Symbol);
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108 }
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109
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110 void RecordStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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111 unsigned ByteAlignment) {
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112 markDefined(*Symbol);
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113 }
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114
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115 void RecordStreamer::emitELFSymverDirective(MCSymbol *Alias,
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116 const MCSymbol *Aliasee) {
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117 SymverAliasMap[Aliasee].push_back(Alias);
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118 }