[TensorExpr] Add a envvar to disable LLVM backend and use IR Eval instead. (#48355)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/48355
Test Plan: Imported from OSS
Reviewed By: eellison
Differential Revision: D25139668
Pulled By: ZolotukhinM
fbshipit-source-id: 34dfcceadb24446d103710f00526693a53f3750f
Author
Mikhail Zolotukhin
