[llvm] [ADT] SCC iterator for general graph (PR #84268)

[Jakub Kuderski via llvm-commits]

https://github.com/kuhar commented:

In the PR description you said:
>  In my project I need to find SCCs in some kind of dependency graph and scc_iterator doesn't meet my need, so I decide to make a more general SCC iterator.

Does the llvm project need it though? Do you plan to upstream future code that requires general graphs, or know of some code that could be cleaned up using it?

https://github.com/llvm/llvm-project/pull/84268