1 files changed, 40 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-func-as-bool.cpp b/clang/test/SemaCXX/warn-func-as-bool.cpp
new file mode 100644
index 0000000..b5df744
--- /dev/null
+++ b/clang/test/SemaCXX/warn-func-as-bool.cpp
@@ -0,0 +1,40 @@
+// 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));
+};
+
+bool f5();
+bool f6(int);
+
+void bar() {
+  bool b;
+
+  b = f1; // expected-warning {{address of function 'f1' will always evaluate to 'true'}} \
+             expected-note {{prefix with the address-of operator to silence this warning}}
+  if (f1) {} // expected-warning {{address of function 'f1' will always evaluate to 'true'}} \
+                expected-note {{prefix with the address-of operator to silence this warning}}
+  b = S::f2; // expected-warning {{address of function 'S::f2' will always evaluate to 'true'}} \
+                expected-note {{prefix with the address-of operator to silence this warning}}
+  if (S::f2) {} // expected-warning {{address of function 'S::f2' will always evaluate to 'true'}} \
+                   expected-note {{prefix with the address-of operator to silence this warning}}
+  b = f5; // expected-warning {{address of function 'f5' will always evaluate to 'true'}} \
+             expected-note {{prefix with the address-of operator to silence this warning}} \
+             expected-note {{suffix with parentheses to turn this into a function call}}
+  b = f6; // expected-warning {{address of function 'f6' will always evaluate to 'true'}} \
+             expected-note {{prefix with the address-of operator to silence this warning}}
+
+  // implicit casts of weakly imported symbols are ok:
+  b = f3;
+  if (f3) {}
+  b = S2::f4;
+  if (S2::f4) {}
+}