tra added inline comments.

================
Comment at: lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp:511-516
+    // Activate workers.
+    syncCTAThreads(CGF);
+
+    // Barrier at end of parallel region.
+    syncCTAThreads(CGF);
+
----------------
Are two back-to-back syncCTAThreads() intentional or did you mean to call 
something else to activate workers?


https://reviews.llvm.org/D28145



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