[llvm] [BOLT] BB can be cold, warm and hot. (PR #121475)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis commented:

Thanks @liusy58. Yeap, these changes are likely steps in the right direction.

However, my understanding is that this assert stays there until all usages of `isCold` and `setIsCold` can also amount for 'warm' blocks. Perhaps if this is done step by step, the asserts can be hoisted at the callers of `isCold` that remain unhandled?


https://github.com/llvm/llvm-project/pull/121475