diff --git a/llvm/lib/Support/TimeProfiler.cpp b/llvm/lib/Support/TimeProfiler.cpp
--- a/llvm/lib/Support/TimeProfiler.cpp
+++ b/llvm/lib/Support/TimeProfiler.cpp
@@ -271,6 +271,7 @@
 // Called from main thread.
 void llvm::timeTraceProfilerCleanup() {
   delete TimeTraceProfilerInstance;
+  TimeTraceProfilerInstance = nullptr;
   std::lock_guard<std::mutex> Lock(Mu);
   for (auto *TTP : *ThreadTimeTraceProfilerInstances)
     delete TTP;