[llvm] BPF: Ensure __sync_fetch_and_add() always generate atomic_fetch_add insn (PR #101428)

[via llvm-commits]

================

----------------
yonghong-song wrote:

> Do you mind if I try to change this behaviour for both llc and disasm? (in a separate pr)

I don't know what code change you intend to do. But you can go ahead to send a patch and so we can discuss the change.

https://github.com/llvm/llvm-project/pull/101428