[llvm] [RISCV] Order stack objects by access density (PR #217507)

[Pengcheng Wang via llvm-commits]

wangpc-pp wrote:

I don't know if I am wrong but my impression is we have a similar patch from Tencent when we were still using Phabricator (but not merged). Anyway, this is a great idea!

https://github.com/llvm/llvm-project/pull/217507