pytorch

45751e0b - Support integral target for the backward of nn.SmoothL1Loss (#61112)

Support integral target for the backward of nn.SmoothL1Loss (#61112) Summary: Fixes https://github.com/pytorch/pytorch/issues/58816 - enhance the backward of `nn.SmoothL1Loss` to allow integral `target` - add test cases in `test_nn.py` to check the `input.grad` between the integral input and its floating counterpart. Pull Request resolved: https://github.com/pytorch/pytorch/pull/61112 Reviewed By: mrshenli Differential Revision: D29775660 Pulled By: albanD fbshipit-source-id: 544eabb6ce1ea13e1e79f8f18c70f148e92be508