pytorch

1136ad59 - Enable simd and loop vectorizer with MSVC

Enable simd and loop vectorizer with MSVC Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/20530 Differential Revision: D15392676 Pulled By: ezyang fbshipit-source-id: c8fda0c7835127f81adf55016223bb4dc14ff40a