[Mlir-commits] [mlir] Revert "[MLIR] [Mem2Reg] Fix unused block argument removal logic (#188484)" (PR #188571)

[Slava Zakharin]

vzakhari wrote:

> I have a patch and a testcase here in case it might be useful [cathyzhyi at 62eafb5](https://github.com/cathyzhyi/llvm-project/commit/62eafb5cd1f2d3df9a3d37bfe03bb21f85615f3c).

Thanks! I basically came up with the same fix, though my test is a bit bigger. I will cherry-pick your change and reland this patch.

https://github.com/llvm/llvm-project/pull/188571