1 files changed, 25 insertions, 0 deletions
diff --git a/tests/codegen/ffi-out-of-bounds-loads.rs b/tests/codegen/ffi-out-of-bounds-loads.rs
new file mode 100644
index 00000000000..099726b2f08
--- /dev/null
+++ b/tests/codegen/ffi-out-of-bounds-loads.rs
@@ -0,0 +1,25 @@
+// Regression test for #29988
+
+// compile-flags: -C no-prepopulate-passes
+// only-x86_64
+// ignore-windows
+
+#[repr(C)]
+struct S {
+    f1: i32,
+    f2: i32,
+    f3: i32,
+}
+
+extern "C" {
+    fn foo(s: S);
+}
+
+fn main() {
+    let s = S { f1: 1, f2: 2, f3: 3 };
+    unsafe {
+        // CHECK: load { i64, i32 }, {{.*}}, align 4
+        // CHECK: call void @foo({ i64, i32 } {{.*}})
+        foo(s);
+    }
+}