1 files changed, 24 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/swap_ptr_to_ref.rs b/src/tools/clippy/tests/ui/swap_ptr_to_ref.rs
new file mode 100644
index 000000000..282f57121
--- /dev/null
+++ b/src/tools/clippy/tests/ui/swap_ptr_to_ref.rs
@@ -0,0 +1,24 @@
+// run-rustfix
+
+#![warn(clippy::swap_ptr_to_ref)]
+
+use core::ptr::addr_of_mut;
+
+fn main() {
+    let mut x = 0u32;
+    let y: *mut _ = &mut x;
+    let z: *mut _ = &mut x;
+
+    unsafe {
+        core::mem::swap(&mut *y, &mut *z);
+        core::mem::swap(&mut *y, &mut x);
+        core::mem::swap(&mut x, &mut *y);
+        core::mem::swap(&mut *addr_of_mut!(x), &mut *addr_of_mut!(x));
+    }
+
+    let y = &mut x;
+    let mut z = 0u32;
+    let z = &mut z;
+
+    core::mem::swap(y, z);
+}