search for: guaranteedtail

...32 Microsoft C++ ABI, I cannot simply forward the arguments to the callee without calling the copy constructor. If I can use a guaranteed tail call, I don't have to emit copy constructor calls, and things are much easier. Currently, in order to get guaranteed TCO, frontends have to enable the GuaranteedTailCall codegen option and obey a narrow set of rules, which includes always using fastcc. This is fairly awkward and doesn't solve my use case, since the ABI requires a particular convention. Instead, I propose that we add a new tail call marker, 'musttail', that guarantees that TCO will...