[llvm] [LoopDeletion] RAUW single-entry header phis after breakLoopBackedge. (PR #106046)

[Nikita Popov via llvm-commits]

nikic wrote:

Looks similar to https://github.com/llvm/llvm-project/blob/a80053322b765eec93951e21db490c55521da2d8/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp#L1207 We might want to reuse that one. But failing that, I wonder whether we might need the forgetValue() call that was introduced in https://github.com/llvm/llvm-project/commit/9a456b7ad3125834377b8aab1598785e8559c224?

https://github.com/llvm/llvm-project/pull/106046