add support for {ones,zeros,full,rand,randn}_like ops (#28981)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28981
This PR adds support for calling those functions on named tensors. The
implementation is not the nicest: in the future we have plans to merge
names into TensorOptions, at which point we don't need the extra
branches that check if the tensor has names. Right now, however, these
functions are very useful to have (in particular, ones_like is used by
autograd to generate gradients).
Test Plan: - Added tests for each of these
Differential Revision: D18270937
Pulled By: zou3519
fbshipit-source-id: 720739ff0474449a960b81728345a4250becbfc3
