[llvm-branch-commits] [flang] release/21.x: [flang][OpenMP] Restore reduction processor behavior broken by #145837 (#150178) (PR #150196)

[Kareem Ergawy via llvm-branch-commits]

ergawy wrote:

I did not know about the backporting process, abandoning this pr to follow the process.

https://github.com/llvm/llvm-project/pull/150196