[llvm] [InstCombine] Fold select pattern with sub and negation to abs intrinsic (PR #156246)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

Missing fold for another variant: https://alive2.llvm.org/ce/z/gRTmZk

https://github.com/llvm/llvm-project/pull/156246