Trilby  filed a deletion request for llvm37-split :
A comment claimed this wouldn't build 1.5 years ago, and it's been flagged out of date for almost a year with no action by the maintainer.
Removal would keep the AUR tidy and save time of those who might otherwise attempt to build this and fail.
 https://aur.archlinux.org/account/Trilby/  https://aur.archlinux.org/pkgbase/llvm37-split/
Request #10714 has been accepted by Alad .