[TensorExpr] Add a fuser pass based on tensor expressions. (#34226)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34226
LLVM and Cuda backends are added in subsequent PRs, so at this point the fuser is pretty useless, but it still can be tested and its logic is not going to change with addition of the codegens.
Differential Revision: D20251838
Test Plan: Imported from OSS
Pulled By: ZolotukhinM
fbshipit-source-id: 82b0d221fa89904ed526689d02a6c7676a8ce8de
Author
Mikhail Zolotukhin
