[llvm] [InstCombine] Reduce range of ctpop for non zero argument (PR #100899)

[Pranav Kant via llvm-commits]

pranavk wrote:

In the original repro, I am using absl and c++17. https://godbolt.org/z/35c9xfn6h but I can't make executor run this because it can't find absl headers.

https://github.com/llvm/llvm-project/pull/100899