[Openmp-commits] [PATCH] D55219: [OpenMP][libomptarget] Flush intermediate values during team reduction

[Gheorghe-Teodor Bercea via Phabricator via Openmp-commits]

gtbercea created this revision.
gtbercea added reviewers: ABataev, caomhin.
Herald added subscribers: openmp-commits, jfb, guansong.

Ensure intermediate values of a team reduction are flushed to memory.


Repository:
  rOMP OpenMP

https://reviews.llvm.org/D55219

Files:
  libomptarget/deviceRTLs/nvptx/src/reduction.cu


Index: libomptarget/deviceRTLs/nvptx/src/reduction.cu
===================================================================
--- libomptarget/deviceRTLs/nvptx/src/reduction.cu
+++ libomptarget/deviceRTLs/nvptx/src/reduction.cu
@@ -444,6 +444,7 @@
 EXTERN void
 __kmpc_nvptx_teams_end_reduce_nowait_simple(kmp_Ident *loc, int32_t global_tid,
                                             kmp_CriticalName *crit) {
+  __threadfence_system();
   (void)atomicExch((uint32_t *)crit, 0);
 }
 


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