[OpenMP][libomptarget] Use shared memory variable for tracking parallel level
Summary: Replace existing infrastructure for tracking parallel level using global memory with a per-team shared memory variable. This minimizes the impact of the overhead of tracking the parallel level for non-nested cases.
Reviewers: ABataev, caomhin
Reviewed By: ABataev
Subscribers: guansong, openmp-commits
Differential Revision: https://reviews.llvm.org/D55773
git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@350747 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed
