simplifications: remove unnecessary optimization
* these double checks are not necessary
* the compiler will move the early return outside of the called
function, basically the functions is partially inlined
* however lto/amalgamation needed for the optimization
Execute move.sh - Rename files from bn_* to match the function names.
* git blame <renamed-file> is not affected
* git log --follow <renamed-file> can be used to show log across renames
