[llvm] Reapply "Reapply "[AMDGPU] prevent shrinking udiv/urem if either oper… (PR #119325)

[Jay Foad via llvm-commits]

jayfoad wrote:

> …and is in… (#118928)"

I suggest always editing commit messages to remove the ellipsis that github puts there. Otherwise you end up with situations like this where there are multiple ellipses and you can no longer read the actual message.

https://github.com/llvm/llvm-project/pull/119325