pytorch

40dd2711 - [Static Runtime] Cleanup LLVMCodeGen memory after code gen completes (#66218)

[Static Runtime] Cleanup LLVMCodeGen memory after code gen completes (#66218) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/66218 This stack of diffs reduces the memory used by LLVMCodeGen object. Here are the numbers on model `294738512`: (this is the number reported as `Memory turnover after freeze_module:` in the output) ``` Before: 123343496 After : 121566008 ``` So, there is a reduction of about `~1.77MB` with this change of making `PytorchLLVMJIT` a singleton. Test Plan: Imported from OSS Reviewed By: ZolotukhinM, hlu1 Differential Revision: D31445798 Pulled By: navahgar fbshipit-source-id: c860d36456b2c5d3e21010c1217e2948326f666d