pytorch

e31d462e - [TensorExpr] Pull changes to core classes for representing expressions and statements from the side branch. (#34224)

[TensorExpr] Pull changes to core classes for representing expressions and statements from the side branch. (#34224) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/34224 Our development has been happening on a side branch `pytorch_fusion` in `bertmaher/pytorch` fork. This PR moves changes to the core classes representing expressions and transformations on them. At this moment, the tensor expressions are only used in tests. Subsequent PRs add LLVM and CUDA codegen for tensor expressions and implement fuser on top of these. This PR is huge as it is a squashed version of changes in the side branch. It is not practical to pull changes one by one from the branch, so here is the squashed version. If you're interested in seeing the history of changes, please refer to https://github.com/bertmaher/pytorch Differential Revision: D20251835 Test Plan: Imported from OSS Pulled By: ZolotukhinM fbshipit-source-id: 1a871acc09cf3c6f7fb4af40d408cdbb82dc7dab