1 files changed, 12 insertions, 0 deletions
diff --git a/tests/codegen/fatptr.rs b/tests/codegen/fatptr.rs
new file mode 100644
index 000000000..1c49b5714
--- /dev/null
+++ b/tests/codegen/fatptr.rs
@@ -0,0 +1,12 @@
+// compile-flags: -C no-prepopulate-passes
+
+#![crate_type = "lib"]
+
+pub trait T {}
+
+// CHECK-LABEL: @copy_fat_ptr
+#[no_mangle]
+pub fn copy_fat_ptr(x: &T) {
+// CHECK-NOT: extractvalue
+    let x2 = x;
+}