[flang-commits] [flang] [mlir] [Flang][OpenMP] Don't generate code for unreachable target regions. (PR #178937)

[Tom Eccles via flang-commits]

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

LGTM but please wait for wider agreement on the mlir dead code analysis approach

https://github.com/llvm/llvm-project/pull/178937