pytorch

cf094d4e - Use TensorIterator for unary operations

Use TensorIterator for unary operations Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/18309 Differential Revision: D14591533 Pulled By: cpuhrsch fbshipit-source-id: a3b0788a481bddf1803c9f2d3289263d7364f8d7