[llvm] [InstCombine] Preserve flags for abs(X) * abs(X) and nabs(X) * nabs(X) (PR #88662)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Some of this code should be removed instead, done in https://github.com/llvm/llvm-project/pull/88675.

https://github.com/llvm/llvm-project/pull/88662