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

[Tom Vijlbrief via llvm-commits]

tomtor wrote:

I am currently testing this PR in a Rust build and I am seeing some changes in generated code which I want to study before a merge of this PR.

Rust normally uses a patched llvm and I am directly using this PR so that could be the cause but I want to check that first. @Patryk27 

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