Provide names for operator nodes in ONNX exported graph. (#27342)
Summary:
The PyTorch exporter does not add any name to the ONNX operators in the exported graph. A common request is to add names to op nodes by default. This helps the readability of the graph in visualization tools such a Netron, or when the ONNX graph is printed as a string. Also, it helps with the debuggability of the ONNX graph.
Therefore this PR adds name to operators in the exporters. The names follow a simple format, <op_type>_<index>. Expect files for tests in `test/onnx/test_operators.py` have been updated.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27342
Reviewed By: hl475
Differential Revision: D17790979
Pulled By: houseroad
fbshipit-source-id: 1eaae88b5f51f152735a2ff96e22827837e34d9d
