[TensorExpr] Implement shape inference for TE. (#41451)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41451
Since TE operates on a limited subset of ops with a well-defined
semantics, we can easily infer shapes of intermediate and output tensors
given shapes of the inputs.
There is a couple of ops that are not yet supported in the shape
inference, once we add them we could relax the shape info requirements
in the TE fuser: currently it requires all values in the fusion group to
have shapes known and we can change it to only inputs.
Test Plan: Imported from OSS
Reviewed By: eellison
Differential Revision: D22543470
Pulled By: ZolotukhinM
fbshipit-source-id: 256bae921028cb6ec3af91977f12bb870c385f40
Author
Mikhail Zolotukhin
