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//===-- RecordStreamer.cpp - Record asm defined and used symbols ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "RecordStreamer.h"
#include "llvm/MC/MCSymbol.h"
using namespace llvm;
void RecordStreamer::markDefined(const MCSymbol &Symbol) {
State &S = Symbols[Symbol.getName()];
switch (S) {
case DefinedGlobal:
case Global:
S = DefinedGlobal;
break;
case NeverSeen:
case Defined:
case Used:
S = Defined;
break;
case DefinedWeak:
break;
case UndefinedWeak:
S = DefinedWeak;
}
}
void RecordStreamer::markGlobal(const MCSymbol &Symbol,
MCSymbolAttr Attribute) {
State &S = Symbols[Symbol.getName()];
switch (S) {
case DefinedGlobal:
case Defined:
S = (Attribute == MCSA_Weak) ? DefinedWeak : DefinedGlobal;
break;
case NeverSeen:
case Global:
case Used:
S = (Attribute == MCSA_Weak) ? UndefinedWeak : Global;
break;
case UndefinedWeak:
case DefinedWeak:
break;
}
}
void RecordStreamer::markUsed(const MCSymbol &Symbol) {
State &S = Symbols[Symbol.getName()];
switch (S) {
case DefinedGlobal:
case Defined:
case Global:
case DefinedWeak:
case UndefinedWeak:
break;
case NeverSeen:
case Used:
S = Used;
break;
}
}
void RecordStreamer::visitUsedSymbol(const MCSymbol &Sym) { markUsed(Sym); }
RecordStreamer::const_iterator RecordStreamer::begin() {
return Symbols.begin();
}
RecordStreamer::const_iterator RecordStreamer::end() { return Symbols.end(); }
RecordStreamer::RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
void RecordStreamer::EmitInstruction(const MCInst &Inst,
const MCSubtargetInfo &STI, bool) {
MCStreamer::EmitInstruction(Inst, STI);
}
void RecordStreamer::EmitLabel(MCSymbol *Symbol, SMLoc Loc) {
MCStreamer::EmitLabel(Symbol);
markDefined(*Symbol);
}
void RecordStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
markDefined(*Symbol);
MCStreamer::EmitAssignment(Symbol, Value);
}
bool RecordStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) {
if (Attribute == MCSA_Global || Attribute == MCSA_Weak)
markGlobal(*Symbol, Attribute);
if (Attribute == MCSA_LazyReference)
markUsed(*Symbol);
return true;
}
void RecordStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
uint64_t Size, unsigned ByteAlignment) {
markDefined(*Symbol);
}
void RecordStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
markDefined(*Symbol);
}
void RecordStreamer::emitELFSymverDirective(MCSymbol *Alias,
const MCSymbol *Aliasee) {
SymverAliasMap[Aliasee].push_back(Alias);
}
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