This is the enum element analogue of the tuple fixup in:
359eda52e5. Additionally as a nice fixup I can now
enable ownership verification on most of the switch code.
I ran into commit ordering issues with cleaning up the address only part of the
emitEnumElement so I included it in this commit. Specifically this was because I
realized that it was possible to get a copy_on_success with an object from this
code and I wanted to enforce the invariant that ConsumptionManagedValues only
have copy_on_success with addresses and borrow_always with objects. It was less
convoluted to just fix the address only code to fit that formulation rather than
shoe-horn the old code into the new form.
rdar://29791263
To do this the commit does a few things:
1. If we enter the tuple dispatch code with an address that is loadable, we
always immediately perform a load_borrow and change the consumable managed value
to BorrowAlways.
2. If we have a take_on_success object, we immediately borrow. We do not want to
do with TakeOnSuccess since we want to define away the need to unforward since
unforwarding recreates a destroy on the already invalidated parent tuple object.
Notice that this code still handles TakeAlways so in simple cases where we have
a +1 value, everything still works.
Since emitTupleDispatchWithOwnership now handles only objects, I renamed it to
emitTupleObjectDispatch.
rdar://29791263
