1 files changed, 32 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/simplifybool.cxx b/compilerplugins/clang/test/simplifybool.cxx
index 383e513b25e2..e6b52c33f3b6 100644
--- a/compilerplugins/clang/test/simplifybool.cxx
+++ b/compilerplugins/clang/test/simplifybool.cxx
@@ -15,4 +15,36 @@ void f1(int a, int b)
     }
 };
 
+// Consitently either warn about all or none of the below occurrences of "!!":
+
+enum E1
+{
+    E1_1 = 1
+};
+
+enum E2
+{
+    E2_1 = 1
+};
+E2 operator&(E2 e1, E2 e2);
+bool operator!(E2 e);
+
+enum class E3
+{
+    E1 = 1
+};
+struct W
+{
+    operator bool();
+};
+W operator&(E3 e1, E3 e2);
+
+bool f0(int n) { return !!(n & 1); }
+
+bool f1(E1 e) { return !!(e & E1_1); }
+
+bool f2(E2 e) { return !!(e & E2_1); }
+
+bool f3(E3 e) { return !!(e & E3::E1); }
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */