[clang] [llvm] [AVR] Fix Avr indvar detection and strength reduction (missed optimization) (PR #152028)

[Patryk Wychowaniec via llvm-commits]

https://github.com/Patryk27 commented:

It's a very nice catch! I think the code is good (modulo the comments already left by @benshi001) and it'd be nice to get this merged 🙂 

https://github.com/llvm/llvm-project/pull/152028