[PyTorch] Devirtualize is_contiguous (#54896)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54896
This should help performance. (For example, it improves total
time spent in a C++ benchmark that just adds 2 tensors in place by
about 10%.)
ghstack-source-id: 125659451
Reviewed By: bhosmer
Differential Revision: D27404164
fbshipit-source-id: e1dce8c02100ee4ce22510298c7e0d0f192be201
