[Birch-san]

bpftrace is considering adding a new backend that wouldn't involve any LLVM[0].

Additionally, ply is another effort (which doesn't use LLVM) to build a DTrace-like frontend to BPF.[1]

[0] https://github.com/iovisor/bpftrace/issues/1845

[1] https://github.com/iovisor/ply