[keithwinstein]

No -- as discussed upthread, clang's musttail attribute requires the target function to have the same number of arguments as the caller and for each argument to be similar to the corresponding caller argument. That's stricter than the underlying LLVM musttail marker (when targeting the tailcc/swifttailcc calling conventions) and is too restrictive to implement Wasm's tail-call feature (and probably Scheme's, etc.), at least if arguments are getting passed to functions natively.

It would be nice if the more relaxed rules of the LLVM musttail marker with tailcc could be exposed in clang (and gcc). I think that's basically what "return goto" would do.