When it comes to taking advantage of the Linux kernel's (e)BPF in-kernel virtual machine, LLVM has served as the compiler of choice for targeting this virtual machine

With the BPF LLVM back-end support continuing to mature, developer Alexei Starovoitov is asking that it no longer be marked experimental / become a first-class LLVM citizen. The BPF back-end has lived within the LLVM tree since January and has gained a lot of support over the months.

So far there's no objections to promoting the LLVM BPF back-end and it looks like it might happen in time for the LLVM 3.7 release later this summer.