[llvm] [AggressiveInstCombine] POPCNT generation for bit-count pattern (PR #180917)

[Rohit Aggarwal via llvm-commits]

rohitaggarwal007 wrote:

This patch should work. I tried [ezsat.ll)](https://raw.githubusercontent.com/dtcxzyw/llvm-opt-benchmark/refs/heads/main/bench/yosys/original/ezsat.ll). It is working.

<img width="645" height="324" alt="image" src="https://github.com/user-attachments/assets/6c274b31-beb4-44d8-bd3f-b6c0cbbd61af" />


https://github.com/llvm/llvm-project/pull/180917