[llvm] [BPF] Support Jump Table (PR #149715)

[Anton Protopopov via llvm-commits]

aspsk wrote:

> When running test_progs-cpuv4 -j, I got some failures like

@yonghong-song I've run all the `test_progs` tests on my current branch with `-bpf-min-jump-table-entries=3`. There are 129 tests which contain a `gotox` instruction (wrote a [script](https://gist.github.com/aspsk/acf848c79900b58ed74efc2108d162a4) to filter them out), 123 pass, 6 fail (but they also fail on vanilla bpf-next in my setup, as I somehow can't run vmtest locally -- my machine seems to have too old distro...). So I am preparing v2 and send it soon.


https://github.com/llvm/llvm-project/pull/149715