1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/abi/mir/mir_codegen_calls_variadic.rs b/src/test/ui/abi/mir/mir_codegen_calls_variadic.rs
new file mode 100644
index 000000000..b3392b9c6
--- /dev/null
+++ b/src/test/ui/abi/mir/mir_codegen_calls_variadic.rs
@@ -0,0 +1,19 @@
+// run-pass
+// ignore-wasm32-bare no libc to test ffi with
+
+#[link(name = "rust_test_helpers", kind = "static")]
+extern "C" {
+    fn rust_interesting_average(_: i64, ...) -> f64;
+}
+
+fn test<T, U>(a: i64, b: i64, c: i64, d: i64, e: i64, f: T, g: U) -> i64 {
+    unsafe {
+        rust_interesting_average(
+            6, a, a as f64, b, b as f64, c, c as f64, d, d as f64, e, e as f64, f, g,
+        ) as i64
+    }
+}
+
+fn main() {
+    assert_eq!(test(10, 20, 30, 40, 50, 60_i64, 60.0_f64), 70);
+}