181       SmallVector<std::pair<MachineBasicBlock *, Register>, 4> VRegs;  in propagateVRegs()  local
186         VRegs.push_back(std::make_pair(  in propagateVRegs()
204           VRegs.size() >= 1 &&  in propagateVRegs()
206               VRegs.begin(), VRegs.end(),  in propagateVRegs()
208                   -> bool { return V.second != VRegs[0].second; }) !=  in propagateVRegs()
209               VRegs.end();  in propagateVRegs()
214         assert(!VRegs.empty() &&  in propagateVRegs()
217         setCurrentVReg(MBB, SwiftErrorVal, VRegs[0].second);  in propagateVRegs()
229         assert(!VRegs.empty() &&  in propagateVRegs()
234             .addReg(VRegs[0].second);  in propagateVRegs()
247       for (auto BBRegPair : VRegs) {  in propagateVRegs()