[llvm-branch-commits] [llvm] release/21.x: [BPF] Backport backend fixes related to BTF (PR #165154)

[Michal R via llvm-branch-commits]

vadorovsky wrote:

> So looks like llvm21 will have an assertion for rust if without backport.

Yes, exactly.

> Does it have problems before llvm21 say llvm20?

Yes, the same problem occurs on LLVM 20 and earlier versions as well. But given that the Rust 1.91.0-beta is already using LLVM 21 and we should expect it to stabilize sometime soon (definitely before holidays / the end of year), I'm fine with backporting the fixes only to LLVM 21.

> In general, I am okay with backport so llvm21 can work for rust bpf part as llvm22 may need some time to be available.

Thank you! Yes, without the backport to LLVM 21, the timeline would become pretty long - we could expect Rust nightly to switch to LLVM 22 around February 2026 and a stable Rust version around spring 2026.


https://github.com/llvm/llvm-project/pull/165154