[llvm] [BasicBlockSections] Introduce the path cloning profile format to BasicBlockSectionsProfileReader. (PR #67214)

[Sriraman Tallam via llvm-commits]

https://github.com/tmsri commented:

The one major comment I have is that I am not convinced about the way you represent cloning decisions.  I think a block cloning decision can be represented by exactly specifying the edge along which you want to clone.  This keeps the specification really simple.  I would like your opinion on this one.  Further, whatever spec you go with, you must give more clear instructions on what constitutes a valid cloning directive and what isn't.  I am inclined to choose a spec that is simple.

https://github.com/llvm/llvm-project/pull/67214