Fix ONNX export of logical ops, including torch.ne, to have correct output datatype (#15677)
Summary:
This is the an updated version of the earlier PR https://github.com/pytorch/pytorch/pull/15185, since that one was closed.
Currently PyTorch ONNX exporter exports the logical ops (lt, gt, le, ge, eq, ne) with output type in corresponding ONNX ops as type tensor(uint8). But ONNX spec allows for only tensor(bool), which is why models that have these ops fail to load properly.
This issue is captured in #11339. Part of this issue, relating to the allowed input types, has been fixed in ONNX spec by houseroad. This PR fixes the other part pertaining to output type.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15677
Reviewed By: dzhulgakov
Differential Revision: D13568450
Pulled By: houseroad
fbshipit-source-id: a6afbea1afdb4edad8f8b1bc492f50b14e5f2fce
