[Static Runtime] Skip ReplaceWithCopy when inputs have writters (#69819)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69819
We should skip ReplaceWithCopy if the inputs to the operator can be updated during inference. For a set of tensors that share data, ReplaceWithCopy should not happen to any of them if there exists updates to any of them.
Currently, the check in place has missed some cases (suppose there exists updates, and uses <= 1). This diff addresses the missing cases by querying AliasDB.
Test Plan:
- Added test cases, including a one that is problematic before this diff
- CI
Reviewed By: mikeiovine
Differential Revision: D33052562
fbshipit-source-id: 61f87e471805f41d071a28212f2f457e8c6785e7
