Summary:
Torch Native Runtime RFC: https://github.com/pytorch/rfcs/pull/72
Added an in-memory representation for input and output specs of a graph. The GraphSignature class models the input and output specs of an exported graph produced by torch.export, which holds the graph information deserialized from the pt2 archive package. Runtime relies on the GraphSignature for weight name lookup and weight loading.
The serialization schema is defined in torch/_export/serde/schema.py
See more at: https://docs.pytorch.org/docs/stable/export.html#torch.export.ExportGraphSignature
Test Plan: Added tests under `test/cpp/nativert/test_graph_signature.cpp`
Differential Revision: D73895378
Pull Request resolved: https://github.com/pytorch/pytorch/pull/152969
Approved by: https://github.com/swolchok
