[llvm] [BOLT] Offset LPStart to avoid unnecessary instructions (PR #116713)

[Maksim Panchenko via llvm-commits]

maksfb wrote:

> Thanks for working on this Maksim. Can we write a test?

The correctness of this change is tested by several EH runtime tests that we already have. Sadly, I'm not aware of any current LLVM tools that can dump EH tables to test the output ELF. Or maybe you have something else in mind?

https://github.com/llvm/llvm-project/pull/116713