Llvm-libs upgrade broke my 3D acceleration

Radeon R5 Graphics video card
Searching in /var/log/Xorg.0.log I found this
AIGLX error: dlopen of /usr/lib/dri/swrast_dri.so failed (libLLVM-8.so: cannot open shared object file: No such file or directory)
In /var/log/pacman.log
[2020-05-31T13:27:42-0500] [ALPM] upgraded llvm-libs (8.0.1-2 -> 10.0.0-1)
I had to downgrade llvm-libs package. I don’t know what happens with this distro ??? Packages with invalid or missing sign, no updates for a long time, and so …

@brli you may need to fix this issue.