Well tinygo takes some go bindings they implemented for llvm, https://github.com/tinygo-org/go-llvm, uses the Go standard library for parsing, and wires it up to a LLVM IR generator, with a set of flexible backend/machine definition machinery.

You could likely improve gobee to use tinygo's packages directly, instead of transpiling to C and calling into clang, and the licenses of the two projects look compatible. You'll still need to deal with defining a subset to pass the verifier, of course.

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From the README:

> Replace clang. clang's BPF backend gives us CO-RE, BTF, and verifier-friendly codegen for free. Reimplementing that costs years and gains nothing.

The primary gotcha you may hit if you try this is how much of the BPF features are implemented by clang, and how much is instead implemented in core LLVM. Even with a LLVM sitting next door you could pull out, the harnesses may not exist independent of clang, but I have not looked THAT deep.