swift234

SILGen: Handle address-only arguments and returns.
Use copy_addr to copy argument addresses into local boxes and to store to the return value address when working with address-only types. Add a bit to ManagedValue so that it knows when it's referencing an address-only value (as opposed to just an address) so it can require that forwarded address-only values be forwardInto-ed a memory location.

Swift SVN r3540