[llvm] [Inline][Cloning] Defer constant propagation after phi-nodes resolution (PR #87963)

[Nikita Popov via llvm-commits]

nikic wrote:

See https://github.com/llvm/llvm-project/pull/87482 for discussion about this issue.

Possibly this change also provide a way to fix that one properly, by delaying simplification until after the returns have been rewritten...

https://github.com/llvm/llvm-project/pull/87963