[all-commits] [llvm/llvm-project] b86ff5: [OpenMP] Sync writes to child thread's data before...

[Bryan Chan via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: b86ff5f6efbed626fee135ae11311569d84b1e15
      https://github.com/llvm/llvm-project/commit/b86ff5f6efbed626fee135ae11311569d84b1e15
  Author: Bryan Chan <bryan.chan at huawei.com>
  Date:   2020-04-14 (Tue, 14 Apr 2020)

  Changed paths:
    M openmp/runtime/src/kmp_barrier.cpp

  Log Message:
  -----------
  [OpenMP] Sync writes to child thread's data before reduction

On systems with weak memory consistency, this patch fixes an intermittent crash
in the reduction function called by __kmp_hyper_barrier_gather, which suffers
from a race on a child thread's data.

Reviewed-By: AndreyChurbanov

Differential Revision: https://reviews.llvm.org/D77603