[flang-commits] [flang] Fix reduction on array sections aborting in lowering (PR #209701)

[Jack Styles via flang-commits]

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@@ -0,0 +1,39 @@
+! Regression test for reductions on array *sections* (e.g. a(2:96)).
+!
+! An array section has rank > 0, so it must be lowered using the boxed
+! whole-array reduction (@add_reduction_byref_box_*) and the section applied
+! via hlfir.designate inside the region. It must NOT be routed through the
+! single-element path (uniq_name = "omp.reduction.element"), which only supports
+! rank-0 references and otherwise aborts in PrivateReductionUtils with
+! "creating reduction/privatization init region for unsupported type".
+
+! RUN: %flang_fc1 -emit-hlfir -fopenmp -fopenmp-version=50 %s -o - | FileCheck %s --implicit-check-not=omp.reduction.element
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Stylie777 wrote:

nit: Usual practise is to place the `RUN` line at the top of the test file. 

https://github.com/llvm/llvm-project/pull/209701