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[OPENMP][NVPTX]Fix __kmpc_flush to flush the memory per system, not per block. 

Summary:
According to the standard, after memory flushing the changes in the
memory must be visible to all the threads in all teams. Patch fixes
this.

Reviewers: gtbercea, kkwli0

Subscribers: guansong, jfb, caomhin, openmp-commits

Differential Revision: https://reviews.llvm.org/D55370

llvm-svn: 348491
This commit is contained in:
Alexey Bataev 2018-12-06 15:27:58 +00:00
parent f30c4ad325
commit 5442f3e549
1 changed files with 1 additions and 1 deletions
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2
openmp/libomptarget/deviceRTLs/nvptx/src/sync.cu
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@ -132,7 +132,7 @@ EXTERN void __kmpc_end_single(kmp_Ident *loc, int32_t global_tid) {
EXTERN void __kmpc_flush(kmp_Ident *loc) {
PRINT0(LD_IO, "call kmpc_flush\n");
__threadfence_block();
__threadfence_system();
}
////////////////////////////////////////////////////////////////////////////////