Add minimalistic implementation of subgraph matcher. (#19322)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19322
ghimport-source-id: 93c713f829d1b2a9aa5d104cb1f30148dd37c967
Differential Revision: D14962182
Pulled By: ZolotukhinM
fbshipit-source-id: 3989fba06502011bed9c24f12648d0baa2a4480c
Author
Mikhail Zolotukhin
