[llvm] [SDag] Notify listeners when deleting a node (PR #66991)

[Sergei Barannikov via llvm-commits]

s-barannikov wrote:

I'm afraid I won't be able to nail this with zero knowledge in X86 vectors. I spent hard time trying to debug with no success.
I'll be happy if someone takes over.


https://github.com/llvm/llvm-project/pull/66991