[llvm-branch-commits] [llvm] [AVR] Backport #118015 and #121498 (PR #125081)

[Patryk Wychowaniec via llvm-branch-commits]

Patryk27 wrote:

I see, I’ll do my best, then! Let’s keep this pull request open and I’ll report back.

https://github.com/llvm/llvm-project/pull/125081