[flang] [llvm] [LoopIdiom] Recognize naive popcount loop pattern (PR #172677)

[Kang-Che Sung 宋岡哲 via llvm-commits]

Explorer09 wrote:

@Aashcharya1
>  AI was used for debugging and validation to double check edge cases and confirm the fix, and only as a helper once the change was already in place. The logic and approach were derived from existing LoopIdiom behavior and local reasoning around the mis-detection.

And you should also disclose that you have used AI to write your pull request summary.

Because. Humans programmers are not repeating points that are obvious in code.

https://github.com/llvm/llvm-project/pull/172677