[llvm] [GVN] Invalidate ICF cache when clearing the instructions (PR #68145)

[Nikita Popov via llvm-commits]

nikic wrote:

Fixed in https://github.com/llvm/llvm-project/commit/46aac949bcfef83d03bffd849955c84c6a8e7c31. We need to remove users from ICF before performing RAUW.

https://github.com/llvm/llvm-project/pull/68145