unsigned CodeViewDebug::maybeRecordFile(const DIFile *F) {
unsigned NextId = FileIdMap.size() + 1;
auto Insertion = FileIdMap.insert(std::make_pair(F, NextId));
if (Insertion.second) {
// We have to compute the full filepath and emit a .cv_file directive.
StringRef FullPath = getFullFilepath(F);
NextId = Asm->OutStreamer->EmitCVFileDirective(NextId, FullPath);
assert(NextId == FileIdMap.size() && ".cv_file directive failed");
}
return Insertion.first->second;
}
void WinCodeViewLineTables::maybeRecordLocation(DebugLoc DL,
const MachineFunction *MF) {
const MDNode *Scope = DL.getScope();
if (!Scope)
return;
StringRef Filename = getFullFilepath(Scope);
// Skip this instruction if it has the same file:line as the previous one.
assert(CurFn);
if (!CurFn->Instrs.empty()) {
const InstrInfoTy &LastInstr = InstrInfo[CurFn->Instrs.back()];
if (LastInstr.Filename == Filename && LastInstr.LineNumber == DL.getLine())
return;
}
FileNameRegistry.add(Filename);
MCSymbol *MCL = Asm->MMI->getContext().CreateTempSymbol();
Asm->OutStreamer.EmitLabel(MCL);
CurFn->Instrs.push_back(MCL);
InstrInfo[MCL] = InstrInfoTy(Filename, DL.getLine());
}
