[Openmp-commits] [llvm] [openmp] [OpenMP][offload] Fix single-thread SPMD cross-team reductions (PR #231843)

[Robert Imschweiler via Openmp-commits]

ro-i wrote:

(also updated the PR description so that it better reflects the approach that this new PR takes)

https://github.com/llvm/llvm-project/pull/231843