1 files changed, 28 insertions, 0 deletions
diff --git a/tests/codegen/repr-transparent-sysv64.rs b/tests/codegen/repr-transparent-sysv64.rs
new file mode 100644
index 000000000..886b0dd9e
--- /dev/null
+++ b/tests/codegen/repr-transparent-sysv64.rs
@@ -0,0 +1,28 @@
+// only-x86_64
+
+// compile-flags: -C no-prepopulate-passes
+
+#![crate_type="lib"]
+
+#[repr(C)]
+pub struct Rgb8 { r: u8, g: u8, b: u8 }
+
+#[repr(transparent)]
+pub struct Rgb8Wrap(Rgb8);
+
+// CHECK: i24 @test_Rgb8Wrap(i24{{( %0)?}})
+#[no_mangle]
+pub extern "sysv64" fn test_Rgb8Wrap(_: Rgb8Wrap) -> Rgb8Wrap { loop {} }
+
+#[repr(C)]
+pub union FloatBits {
+    float: f32,
+    bits: u32,
+}
+
+#[repr(transparent)]
+pub struct SmallUnion(FloatBits);
+
+// CHECK: i32 @test_SmallUnion(i32{{( %0)?}})
+#[no_mangle]
+pub extern "sysv64" fn test_SmallUnion(_: SmallUnion) -> SmallUnion { loop {} }