[llvm-branch-commits] [flang] [flang][OpenMP] Improve diagnosing invalid operators in DECLARE_REDUCTION (PR #232353)

[Krzysztof Parzyszek via llvm-branch-commits]

kparzysz wrote:

@tblah, @kiranchandramohan, @mjklemm  Do you remember if we had decided to never allow subtraction in reductions?

https://github.com/llvm/llvm-project/pull/232353