[clang] [clang][dataflow] Strengthen pointer comparison. (PR #75170)

[Gábor Horváth via cfe-commits]

https://github.com/Xazax-hun approved this pull request.

This is a massive improvement! Thanks! Looks great to me, I have some not too important comments inline. 

https://github.com/llvm/llvm-project/pull/75170