[flang-commits] [flang] [flang] Canonicalize redundant pointer converts. (PR #121864)

[Tom Eccles via flang-commits]

https://github.com/tblah approved this pull request.

This LGTM, but maybe it is a broader problem that stack arrays doesn't understand `fir.convert` because it could still get confused by non-redundant converts. I'll add that to my to-do list.

https://github.com/llvm/llvm-project/pull/121864