print source code when a function is executed (#25868)
Summary:
While this isn't ideal as it might print out the same source every time a function is run; it's still easier to go and tweak python code to reduce loop counts, than to insert `std::cout` and recompile cpp code.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25868
Differential Revision: D17318386
Pulled By: Krovatkin
fbshipit-source-id: 928ba6543204042924ab41a724635594709630de
