diff --git a/test/CodeGen/conditional-gnu-ext.c b/test/CodeGen/conditional-gnu-ext.c
new file mode 100644
index 0000000..5b2eb3f
--- /dev/null
+++ b/test/CodeGen/conditional-gnu-ext.c
@@ -0,0 +1,6 @@
+// RUN: clang -emit-llvm %s
+// PR1824
+
+int foo(int x, short y) {
+  return x ?: y;
+}