1 files changed, 24 insertions, 0 deletions
diff --git a/test/Sema/sign-compare-enum.c b/test/Sema/sign-compare-enum.c
new file mode 100644
index 000000000000..8661bd502fe5
--- /dev/null
+++ b/test/Sema/sign-compare-enum.c
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -fsyntax-only -DUNSIGNED -verify -Wsign-compare %s
+// RUN: %clang_cc1 -triple=x86_64-pc-win32 -fsyntax-only -DSIGNED -verify -Wsign-compare %s
+// RUN: %clang_cc1 -triple=x86_64-pc-linux-gnu -fsyntax-only -DUNSIGNED -DSILENCE -verify %s
+// RUN: %clang_cc1 -triple=x86_64-pc-win32 -fsyntax-only -DSIGNED -DSILENCE -verify %s
+
+int main() {
+  enum A { A_a = 0, A_b = 1 };
+  static const int message[] = {0, 1};
+  enum A a;
+
+  if (a < 2)
+    return 0;
+
+#if defined(SIGNED) && !defined(SILENCE)
+  if (a < sizeof(message)/sizeof(message[0])) // expected-warning {{comparison of integers of different signs: 'enum A' and 'unsigned long long'}}
+    return 0;
+#else
+  // expected-no-diagnostics
+  if (a < 2U)
+    return 0;
+  if (a < sizeof(message)/sizeof(message[0]))
+    return 0;
+#endif
+}