pytorch

4fc7832d - Reference implementations for softmax, log_softmax, logsumexp (#79423)

Reference implementations for softmax, log_softmax, logsumexp (#79423) This PR adds references for: - `torch.softmax` - `torch.log_softmax` - `torch.logsumexp` Unfortunately, none of them currently pass `test_python_ref_executor` even with `"aten"` executor. Pull Request resolved: https://github.com/pytorch/pytorch/pull/79423 Approved by: https://github.com/mruberry