pytorch

05fa570b - Add empty_generic, which allocates an empty tensor in a device-generic way (#54703)

Add empty_generic, which allocates an empty tensor in a device-generic way (#54703) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/54703 The trick is that this function takes in the allocator and dispatch key explicitly; so you still need to know where to find the appropriate allocator. The plan is to use this for meta tensors, but you probably could also use this for empty_cuda as well. It also takes in arguments post optional resolution, which can save a few instructions if you want to call this function directly (no uses yet). Signed-off-by: Edward Z. Yang <ezyang@fb.com> Test Plan: Imported from OSS Reviewed By: iseeyuan Differential Revision: D27338814 Pulled By: ezyang fbshipit-source-id: 131c97922d245e9a2de547527123b464bddb2f99