Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69277
LazyView is the main class for tracking alias caused by view
ops. The corresponding IR classes for view ops are hand-written now, and
we can switch to code-gen them in future. For certain view ops, they
have a reverse IR class to perform inplace update in the backward
direction on a chain of alias ops.
As part of the future work, we will simplify the logic for LazyView once
the functionalization pass in core is ready to use.
Test Plan: Imported from OSS
Reviewed By: wconstab
Differential Revision: D32820014
Pulled By: desertfire
fbshipit-source-id: d9eb526cb23885f667e4815dc9dd291a7b7e4256
