1555   llvm::BasicBlock *NullBB;  member
1556   NullReturnState() : NullBB(nullptr) {}  in NullReturnState()
1561     NullBB = CGF.createBasicBlock("msgSend.null-receiver");  in init()
1569     CGF.Builder.CreateCondBr(isNull, NullBB, callBB);  in init()
1581     if (!NullBB) return result;  in complete()
1595     CGF.EmitBlock(NullBB);  in complete()
1613     assert(CGF.Builder.GetInsertBlock() == NullBB);  in complete()
1634       phi->addIncoming(null, NullBB);  in complete()
1660     real->addIncoming(scalarZero, NullBB);  in complete()
1663     imag->addIncoming(scalarZero, NullBB);  in complete()
1939         if (!nullReturn.NullBB)  in EmitMessageSend()
6743         if (!nullReturn.NullBB)  in EmitVTableMessageSend()