1712   llvm::BasicBlock *NullBB;  member
1713   NullReturnState() : NullBB(nullptr) {}  in NullReturnState()
1718     NullBB = CGF.createBasicBlock("msgSend.null-receiver");  in init()
1726     CGF.Builder.CreateCondBr(isNull, NullBB, callBB);  in init()
1741     if (!NullBB) return result;  in complete()
1755     CGF.EmitBlock(NullBB);  in complete()
1791     assert(CGF.Builder.GetInsertBlock() == NullBB);  in complete()
1813       phi->addIncoming(null, NullBB);  in complete()
1840     real->addIncoming(scalarZero, NullBB);  in complete()
1843     imag->addIncoming(scalarZero, NullBB);  in complete()
7378         if (!nullReturn.NullBB)  in EmitVTableMessageSend()