pytorch

a47fb579 - Change memory format promotion rules of point wise operators. (#37968)

Change memory format promotion rules of point wise operators. (#37968) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/37968 Modify memory format promotion rules to avoid promoting when one of the input is ambiguous. New rules are: Ambiguous + Contiguous = Contiguous Ambiguous + Channels Last = Channels Last Contiguous + Ambiguous ( NC11 ) = Contiguous Contiguous + Channels Last = Contiguous ( + Warning ) Before this PR: Channels Last Channels Last + Contiguous = Channels Last ( + Warning ) Channels Last + Ambiguous = Channels Last Bias + Channels Last = Channels Last Channels Last + Bias = Channels Last Test Plan: Imported from OSS Differential Revision: D21819573 Pulled By: VitalyFedyunin fbshipit-source-id: 7381aad11720b2419fb37a6da6ff4f54009c6532