tree c20193d7ca3206dd4748ec34811707882a33c5bf
parent abd24261f149cd3ce6a1de8abec72af69a3c8713
author Johannes Doerfert <johannes@jdoerfert.de> 1635621865 -0500
committer Copybara-Service <copybara-worker@google.com> 1635913540 -0700

[OpenMP][FIX] Avoid a race between initialization and first state reads

When we pick state 0 to initialize state but thread N is going to be the
"main thread", in generic mode, we would require extra synchronization.
Instead, we should pick the main thread to initialize state in generic
mode and any thread in SPMD mode.

Reviewed By: tianshilei1992

Differential Revision: https://reviews.llvm.org/D112874

GitOrigin-RevId: ccb5d2726a8bc0092857f9e69963e872d78cd4d8