--- /dev/null
+// RUN: %clang_cc1 -x c++ -verify -fsyntax-only %s
+
+void f1();
+
+struct S {
+ static void f2();
+};
+
+extern void f3() __attribute__((weak_import));
+
+struct S2 {
+ static void f4() __attribute__((weak_import));
+};
+
+void bar() {
+ bool b;
+
+ b = f1; // expected-warning {{address of function 'f1' will always evaluate to 'true'}}
+ if (f1) {} // expected-warning {{address of function 'f1' will always evaluate to 'true'}}
+ b = S::f2; // expected-warning {{address of function 'S::f2' will always evaluate to 'true'}}
+ if (S::f2) {} // expected-warning {{address of function 'S::f2' will always evaluate to 'true'}}
+
+ // implicit casts of weakly imported symbols are ok:
+ b = f3;
+ if (f3) {}
+ b = S2::f4;
+ if (S2::f4) {}
+}