nonmoving: Optimise log2_ceil
This is both simpler and produces slightly better (branchless) machine code on x86.
Edited by Ben Gamari
Due to a large amount of spam we do not allow new users to create repositories, they are "external" users. If you are a new user and want to create a repository, for example for forking GHC, open a new issue on ghc/ghc using the "get-verified" issue template
This is both simpler and produces slightly better (branchless) machine code on x86.