[llvm-branch-commits] [llvm] [BOLT][PAC] Warn about synchronous unwind tables (PR #165227)

[Paschalis Mpeis via llvm-branch-commits]

paschalis-mpeis wrote:

Sounds good. So BOLT doesnt know whether inconsistencies are due to sync/async unwind tables, but instead makes an assumption to help the user? Could you summarise this with a comment in code around the point you emit the warning?

Since you are on this, should it handle cases like the below? (we've started seeing these recently)
> BOLT-INFO: MarkRAStates ran on 0 functions. Ignored 0 functions (nan%) because of CFI inconsistencies

https://github.com/llvm/llvm-project/pull/165227