pytorch

de62bcac - Implement the patterns module for the multi subgraph rewriter. (#71181)

Implement the patterns module for the multi subgraph rewriter. (#71181) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/71181 This diff introduces the patterns module that defines a pattern-replacement pair for the experimental multi subgraph rewriter. Test Plan: Tested locally. Unit test suite forthcoming. Reviewed By: ajauhri Differential Revision: D32374542 fbshipit-source-id: 4ae8da575976e96b02c5c33c6ae2a0943fc7f126