[flang] [llvm] [mlir] [OpenMP][flang] Lowering of OpenMP custom reductions to MLIR (PR #168417)

[Tom Eccles via llvm-commits]

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@@ -462,7 +462,7 @@ static void genCombiner(fir::FirOpBuilder &builder, mlir::Location loc,
                         bool isByRef) {
   ty = fir::unwrapRefType(ty);
 
-  if (fir::isa_trivial(ty)) {
+  if (fir::isa_trivial(ty) || fir::isa_derived(ty)) {
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tblah wrote:

Why would `createScalarCombiner` work with a derived type?

https://github.com/llvm/llvm-project/pull/168417