[NNC] Dead Store Elimination (#49030)
Summary:
Adds a new optimization method to LoopNest which eliminates stores that do not contribute to any output. It's unlikely any of the lowerings of aten operators produce these stores yet, but this creates some wiggle room for transformations in the future.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49030
Reviewed By: tugsbayasgalan
Differential Revision: D25434538
Pulled By: nickgg
fbshipit-source-id: fa1ead82e6f7440cc783c6116b23d0b7a5b5db4b
