[flang-commits] [flang] [flang][openmp]Add UserReductionDetails and use in DECLARE REDUCTION (PR #140066)

[Tom Eccles via flang-commits]

tblah wrote:

I'm going to merge this as it is and fix the - reduction operator deprecation warning in a follow-up patch. This patch is already too big.

https://github.com/llvm/llvm-project/pull/140066