diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Support/Parallel.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/Support/Parallel.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/contrib/llvm-project/llvm/lib/Support/Parallel.cpp b/contrib/llvm-project/llvm/lib/Support/Parallel.cpp index 9a2e1003da5a..71e3a1362f7e 100644 --- a/contrib/llvm-project/llvm/lib/Support/Parallel.cpp +++ b/contrib/llvm-project/llvm/lib/Support/Parallel.cpp @@ -151,7 +151,12 @@ static std::atomic<int> TaskGroupInstances; // lock, only allow the first TaskGroup to run tasks parallelly. In the scenario // of nested parallel_for_each(), only the outermost one runs parallelly. TaskGroup::TaskGroup() : Parallel(TaskGroupInstances++ == 0) {} -TaskGroup::~TaskGroup() { --TaskGroupInstances; } +TaskGroup::~TaskGroup() { + // We must ensure that all the workloads have finished before decrementing the + // instances count. + L.sync(); + --TaskGroupInstances; +} void TaskGroup::spawn(std::function<void()> F) { if (Parallel) { |