1 files changed, 15 insertions, 0 deletions
diff --git a/tests/codegen-llvm/cffi/c-variadic-naked.rs b/tests/codegen-llvm/cffi/c-variadic-naked.rs
new file mode 100644
index 00000000000..5843628b633
--- /dev/null
+++ b/tests/codegen-llvm/cffi/c-variadic-naked.rs
@@ -0,0 +1,15 @@
+//@ needs-asm-support
+//@ only-x86_64
+
+// tests that `va_start` is not injected into naked functions
+
+#![crate_type = "lib"]
+#![feature(c_variadic)]
+#![no_std]
+
+#[unsafe(naked)]
+pub unsafe extern "C" fn c_variadic(_: usize, _: ...) {
+    // CHECK-NOT: va_start
+    // CHECK-NOT: alloca
+    core::arch::naked_asm!("ret")
+}