[flang-commits] [flang] [flang][OpenMP] Do not emit a use-only item for a reduction symbol in a module file (PR #207492)

[via flang-commits]

MattPD wrote:

Good catch. I generalized the skip. It now covers any reduction whose operator is itself re-exported, whether a defined operator or an intrinsic operator with a user interface such as a derived-type `operator(+)`. On read, the reduction is recovered through that operator.

The remaining reductions have no operator to recover through: an intrinsic operator on an intrinsic type, and special functions like max and min. A plain USE of the defining module re-exports them instead. That half lands in #207493 alongside its lowering.

The module file now round-trips for every re-exported user reduction.


https://github.com/llvm/llvm-project/pull/207492