[llvm] [LLVM] Add option to store Parent-pointer in ilist_node_base (PR #94224)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Not really familiar with all the infrastructure here, but conceptually this looks good to me. I've always disliked how a proper insertion point requires both an iterator and a BasicBlock, and this solves the problem quite elegantly.

https://github.com/llvm/llvm-project/pull/94224