pytorch

4d82e5bf - [PyTorch] Avoid registering ops into dispatcher in lightweight dispatch (#74664)

[PyTorch] Avoid registering ops into dispatcher in lightweight dispatch (#74664) Summary: This change adds the following logic: If lightweight dispatch is enabled, do not generate `TORCH_LIBARAY` API calls for operator schema and implementations, since these operators will be registered into JIT op registry. `skip_dispatcher_op_registration` is an existing argument to `gen.py`. With that set, `RegisterDispatchKey.cpp` will not generate `m.def` and `m.impl` for each native function. This logic will be removed once we find a better way to skip op registration into dispatcher. Pull Request resolved: https://github.com/pytorch/pytorch/pull/74664 Test Plan: Rely on unit tests for lightweight dispatch. Reviewed By: priyaramani Differential Revision: D34634300 Pulled By: larryliu0820 fbshipit-source-id: d87828f2c6c62f15024ce9e98823b09ee5a81336 (cherry picked from commit 3eb1c27547dea6accd9fa95496189f3699d91201)