[llvm] AMDGPU: Match and Select BITOP3 on gfx950 (PR #117843)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> Hi @arsenm ,
> 
> here is a problem with `bitop3.ll` test of the expensive test builders
> 
> * https://lab.llvm.org/buildbot/#/builders/187/builds/2801

Fixed by #117940


https://github.com/llvm/llvm-project/pull/117843