Dont introduce aliasing in CSE or Constant Pooling (#19576)
Summary:
We can't introduce aliasing to a graph output, since they may be mutated after.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19576
Differential Revision: D15057734
Pulled By: eellison
fbshipit-source-id: 33594c05d985a0c58edebd6252e1ee2c0efb6f0e
