pytorch

1dc2b527 - [TensorExpr] Add a wrapper for all expr and stmt pointers. (#63195)

[TensorExpr] Add a wrapper for all expr and stmt pointers. (#63195) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/63195 This helps us to later switch from using KernelArena with raw pointers to shared pointers without having to change all our source files at once. The changes are mechanical and should not affect any functionality. With this PR, we're changing the following: * `Add*` --> `AddPtr` * `new Add(...)` --> `alloc<Add>(...)` * `dynamic_cast<Add*>` --> `to<Add>` * `static_cast<Add*>` --> `static_to<Add>` Due to some complications with args forwarding, some places became more verbose, e.g.: * `new Block({})` --> `new Block(std::vector<ExprPtr>())` Test Plan: Imported from OSS Reviewed By: navahgar Differential Revision: D30292779 Pulled By: ZolotukhinM fbshipit-source-id: 150301c7d2df56b608b035827b6a9a87f5e2d9e9