[Openmp-commits] [openmp] r348148 - [OpenMP][libomptarget] Flush intermediate values during team reduction

[Gheorghe-Teodor Bercea via Openmp-commits]

Author: gbercea
Date: Mon Dec  3 07:21:49 2018
New Revision: 348148

URL: http://llvm.org/viewvc/llvm-project?rev=348148&view=rev
Log:
[OpenMP][libomptarget] Flush intermediate values during team reduction 

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

Reviewers: ABataev, caomhin

Reviewed By: ABataev

Subscribers: guansong, jfb, openmp-commits

Differential Revision: https://reviews.llvm.org/D55219

Modified:
    openmp/trunk/libomptarget/deviceRTLs/nvptx/src/reduction.cu

Modified: openmp/trunk/libomptarget/deviceRTLs/nvptx/src/reduction.cu
URL: http://llvm.org/viewvc/llvm-project/openmp/trunk/libomptarget/deviceRTLs/nvptx/src/reduction.cu?rev=348148&r1=348147&r2=348148&view=diff
==============================================================================
--- openmp/trunk/libomptarget/deviceRTLs/nvptx/src/reduction.cu (original)
+++ openmp/trunk/libomptarget/deviceRTLs/nvptx/src/reduction.cu Mon Dec  3 07:21:49 2018
@@ -444,6 +444,7 @@ EXTERN int32_t __kmpc_nvptx_teams_reduce
 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);
 }