support addcmul, addcdiv (#28975)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28975
TensorIterator supports propagating names so we just needed to enable
them with support_named_tensor: True
Test Plan:
- really basic tests to test that each variant (outplace, inplace, out=)
supports named tensors.
Differential Revision: D18252421
Pulled By: zou3519
fbshipit-source-id: ea7fb59dcf8c708b6e45d03b9c2ba27fa6b6ce98
