[llvm] [SLP]Improve minbitwidth analysis. (PR #84536)

[Zequan Wu via llvm-commits]

ZequanWu wrote:

> > reduced.txt
> 
> Should be fixed in [3942bd2](https://github.com/llvm/llvm-project/commit/3942bd2fb56380aa050977dc6aede011e191d9b0)

Thanks for the quick fix.

https://github.com/llvm/llvm-project/pull/84536