[JIT] Make output of prim::TupleConstruct alias only with its inputs (#64879)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64879
This change makes the output of `prim::TupleConstruct` alias only with its inputs *when* the created tuple is directly returned from the graph.
The same treatment could be made to any tuples newly constructed by `prim::TupleConstruct` if they do not let their elements escape. However, this change only focuses on only one simplest, but frequently used usecase: tuples constructed only to be returned from a graph. This usecase turns out to be very often used.
Test Plan:
Added
- `AliasMoveForTupleConstructWithSingleUseAsGraphOutput`
- `WildcardAliasForTupleConstructWithUses`
to cover the newly added code.
Reviewed By: eellison
Differential Revision: D30437737
fbshipit-source-id: 417fbc6bc348062e60e7acdddd340d4754d090eb
