check for object equality in constant pooling (#31800)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31800
If we know that two constants are the same object, we can ignore other constraints and pool them together. This fixes an issue introduced by the other PR where quantization relied on constant pooling happening for correctness.
Test Plan: Imported from OSS
Differential Revision: D19269499
Pulled By: eellison
fbshipit-source-id: 9d4396125aa6899cb081863d463d4f024135cbf4
