890   SmallVector<std::unique_ptr<WriterContext>, 4> Contexts;  in mergeInstrProfile()  local
892     Contexts.emplace_back(std::make_unique<WriterContext>(  in mergeInstrProfile()
899                 Contexts[0].get());  in mergeInstrProfile()
907                  Contexts[Ctx].get());  in mergeInstrProfile()
913     unsigned Mid = Contexts.size() / 2;  in mergeInstrProfile()
914     unsigned End = Contexts.size();  in mergeInstrProfile()
918         Pool.async(mergeWriterContexts, Contexts[I].get(),  in mergeInstrProfile()
919                    Contexts[I + Mid].get());  in mergeInstrProfile()
922         Pool.async(mergeWriterContexts, Contexts[0].get(),  in mergeInstrProfile()
923                    Contexts[End - 1].get());  in mergeInstrProfile()
934   for (std::unique_ptr<WriterContext> &WC : Contexts) {  in mergeInstrProfile()
944   filterFunctions(Contexts[0]->Writer.getProfileData());  in mergeInstrProfile()
946   writeInstrProfile(OutputFilename, OutputFormat, Contexts[0]->Writer);  in mergeInstrProfile()