[libc-commits] [libc] [libc] Use Block as a byte-backed proxy (PR #201001)

[Schrodinger ZHU Yifan via libc-commits]

SchrodingerZhu wrote:

@mysterymath I have addressed the comments and update the PR description body. Please take a look. Could you also check my comments on the removal of null check? 

https://github.com/llvm/llvm-project/pull/201001