[llvm] [BOLT][AArch64] Support block reordering beyond 1KB for FEAT_CMPBR. (PR #185443)

[Gergely Bálint via llvm-commits]

bgergely0 wrote:

Hi Alexandros,

I quickly skimmed through related code, but not sure of the answer:
when decreasing `ShortestJumpSpan`, does this change affect binaries without cmpbr? Or the function will just do more work, but arrive at the same layout?

In other words, does this stricter requirement for cmpbr change BOLT's ability to optimize current workloads, and to what extent?

https://github.com/llvm/llvm-project/pull/185443