[all-commits] [llvm/llvm-project] 447109: [OpenMP][FIX] Data race in the SPMD execution of t...

[Johannes Doerfert via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 44710940af5bed3c338c4c397c561bfb83790218
      https://github.com/llvm/llvm-project/commit/44710940af5bed3c338c4c397c561bfb83790218
  Author: Johannes Doerfert <johannes at jdoerfert.de>
  Date:   2021-10-07 (Thu, 07 Oct 2021)

  Changed paths:
    M openmp/libomptarget/DeviceRTL/src/Parallelism.cpp

  Log Message:
  -----------
  [OpenMP][FIX] Data race in the SPMD execution of the new runtime

We need to synchronize the threads *before* we destroy the RAII objects
that hold the old values and not after to avoid threads executing the
parallel region but seeing an inconsistent state.

Reviewed By: tianshilei1992

Differential Revision: https://reviews.llvm.org/D111369