Nate Chandler 98acb40d99 [SIL] Addr-only enums have non-none ownership. ...

Values produced by address-only `enum` instructions have non-none
ownership.  And because `enum` is representation-changing, they have
`owned` ownership.

This corresponds at the opaque values SIL stage to the fact that at the
address-lowered SIL stage the storage location has non-trivial
initialization which must be `destroy_addr`d, regardless of whether an
empty case was stored to it.

2023-11-16 11:03:14 -08:00

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