C++ API: torch::nn::BatchNorm1d (#28176)
Summary:
Add torch::nn::BatchNorm1d function/module support for the C++ API.
torch::nn::BatchNorm{2,3}d will be added after this PR is merged.
Related Issue: https://github.com/pytorch/pytorch/issues/25883
Reviewer: yf225
I would like to discuss about below items.
* Necessity of `num_batches_tracked` in `BatchNormImplBase`
* `num_batches_tracked` is needed to calculate `momentum` when we do not feed `momentum` argument in Python API. But in C++ API, `momentum` argument has a default value.
* `num_batches_tracked` is only used for counting up `BatchNorm1d::foward()` call. I think it is no necessary for user anymore.
* The design of `BatchNorm{1,2,3}dOptions`
* We have already `BatchNormOptions` used for deprecated `BatchNorm` module. However, it is hard to use it for `BatchNorm{1,2,3}dOptions` because of the arguments disagreement of each modules.
* In this PR, I introduce `BatchNormOptionsv2` template class for the `BatchNorm{1,2,3}dOptions`. But I'm not sure this design is good or not.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28176
Differential Revision: D18196843
Pulled By: yf225
fbshipit-source-id: 667e2b5de4150d5776c41b9088c9e6c2ead24cd4
