[llvm] [AArch64][BOLT] Ensure tentative code layout for cold BBs runs. (PR #96609)

[Maksim Panchenko via llvm-commits]

https://github.com/maksfb requested changes to this pull request.

The change looks good to me, but I believe the test case will fail on non-debug builds.

https://github.com/llvm/llvm-project/pull/96609