[PyTorch] Check is_same instead of data_ptr in addmm_out_cuda_impl (#55111)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55111
I don't see how we could have ended up with !is_same but also identical data_ptr, and is_same is cheaper.
ghstack-source-id: 125438822
Test Plan: Existing CI?
Reviewed By: ngimel
Differential Revision: D27484914
fbshipit-source-id: 22125b29e6e09d312a2b92e893d08c69059e4435
