Reland: [TensorExpr] Add `TensorExprKernel::runFast` method. (#57552)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57552
This method uses `CodeGen::call_raw` instead of `CodeGen::call`.
Relanding #57328 (the entire stack) which was reverted because I forgot
to guard a new test with `ifdef LLVM`.
Test Plan: Imported from OSS
Reviewed By: bertmaher
Differential Revision: D28195047
Pulled By: ZolotukhinM
fbshipit-source-id: bcfd3cb5b4f33a149b7549515ffd705e2c4f208f
Author
Mikhail Zolotukhin
