1 //===-- RecordStreamer.cpp - Record asm definde and used symbols ----------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "RecordStreamer.h"
11 #include "llvm/MC/MCSymbol.h"
12 using namespace llvm;
13
markDefined(const MCSymbol & Symbol)14 void RecordStreamer::markDefined(const MCSymbol &Symbol) {
15 State &S = Symbols[Symbol.getName()];
16 switch (S) {
17 case DefinedGlobal:
18 case Global:
19 S = DefinedGlobal;
20 break;
21 case NeverSeen:
22 case Defined:
23 case Used:
24 S = Defined;
25 break;
26 case GlobalWeak:
27 break;
28 }
29 }
30
markGlobal(const MCSymbol & Symbol,MCSymbolAttr Attribute)31 void RecordStreamer::markGlobal(const MCSymbol &Symbol,
32 MCSymbolAttr Attribute) {
33 State &S = Symbols[Symbol.getName()];
34 switch (S) {
35 case DefinedGlobal:
36 case Defined:
37 S = (Attribute == MCSA_Weak) ? GlobalWeak : DefinedGlobal;
38 break;
39
40 case NeverSeen:
41 case Global:
42 case Used:
43 S = (Attribute == MCSA_Weak) ? GlobalWeak : Global;
44 break;
45 case GlobalWeak:
46 break;
47 }
48 }
49
markUsed(const MCSymbol & Symbol)50 void RecordStreamer::markUsed(const MCSymbol &Symbol) {
51 State &S = Symbols[Symbol.getName()];
52 switch (S) {
53 case DefinedGlobal:
54 case Defined:
55 case Global:
56 case GlobalWeak:
57 break;
58
59 case NeverSeen:
60 case Used:
61 S = Used;
62 break;
63 }
64 }
65
visitUsedSymbol(const MCSymbol & Sym)66 void RecordStreamer::visitUsedSymbol(const MCSymbol &Sym) { markUsed(Sym); }
67
begin()68 RecordStreamer::const_iterator RecordStreamer::begin() {
69 return Symbols.begin();
70 }
71
end()72 RecordStreamer::const_iterator RecordStreamer::end() { return Symbols.end(); }
73
RecordStreamer(MCContext & Context)74 RecordStreamer::RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
75
EmitInstruction(const MCInst & Inst,const MCSubtargetInfo & STI)76 void RecordStreamer::EmitInstruction(const MCInst &Inst,
77 const MCSubtargetInfo &STI) {
78 MCStreamer::EmitInstruction(Inst, STI);
79 }
80
EmitLabel(MCSymbol * Symbol)81 void RecordStreamer::EmitLabel(MCSymbol *Symbol) {
82 MCStreamer::EmitLabel(Symbol);
83 markDefined(*Symbol);
84 }
85
EmitAssignment(MCSymbol * Symbol,const MCExpr * Value)86 void RecordStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
87 markDefined(*Symbol);
88 MCStreamer::EmitAssignment(Symbol, Value);
89 }
90
EmitSymbolAttribute(MCSymbol * Symbol,MCSymbolAttr Attribute)91 bool RecordStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
92 MCSymbolAttr Attribute) {
93 if (Attribute == MCSA_Global || Attribute == MCSA_Weak)
94 markGlobal(*Symbol, Attribute);
95 return true;
96 }
97
EmitZerofill(MCSection * Section,MCSymbol * Symbol,uint64_t Size,unsigned ByteAlignment)98 void RecordStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
99 uint64_t Size, unsigned ByteAlignment) {
100 markDefined(*Symbol);
101 }
102
EmitCommonSymbol(MCSymbol * Symbol,uint64_t Size,unsigned ByteAlignment)103 void RecordStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
104 unsigned ByteAlignment) {
105 markDefined(*Symbol);
106 }
107