[TensorExpr] Switch Exprs and Stmt from kernel-arena to shared_ptr. (#63216)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63216
Currently there are three classes managed by KernelArena: Expr, Stmt,
and Tensor (and derived classes). KernelArena has been a long standing
painpoint for NNC devs and we're moving away from that memory management
model to ref-count based memory model (using shared_ptr). This commit
switches Expr and Stmt to shared_ptr and is the biggest change in this
transition. Later commits will detach Tensor from KernelArena and kill
the arena + scope altogether.
Differential Revision:
D30353195
D30353195
Test Plan: Imported from OSS
Reviewed By: navahgar
Pulled By: ZolotukhinM
fbshipit-source-id: 9575225ada3d0fb65087ae40435f3dfea4792cae
Author
Mikhail Zolotukhin
