--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/SemaTemplate/warn-thread-safety-analysis.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -std=c++11 %s -verify -Wthread-safety-analysis
+
+class Mutex {
+public:
+  void Lock() __attribute__((exclusive_lock_function()));
+  void Unlock() __attribute__((unlock_function()));
+};
+
+class A {
+public:
+  Mutex mu1, mu2;
+
+  void foo() __attribute__((exclusive_locks_required(mu1))) __attribute__((exclusive_locks_required(mu2))) {}
+
+  template <class T> void bar() __attribute__((exclusive_locks_required(mu1))) __attribute__((exclusive_locks_required(mu2))) {
+    foo();
+  }
+};
+
+void f() {
+  A a;
+  a.mu1.Lock();
+  a.mu2.Lock();
+  a.bar<int>();
+  a.mu2.Unlock();
+  a.bar<int>(); // expected-warning {{calling function 'bar<int>' requires holding mutex 'a.mu2' exclusively}}
+  a.mu1.Unlock();
+  a.bar<int>(); // expected-warning {{calling function 'bar<int>' requires holding mutex 'a.mu1' exclusively}} \
+                   expected-warning {{calling function 'bar<int>' requires holding mutex 'a.mu2' exclusively}}
+}