1 files changed, 11 insertions, 0 deletions
diff --git a/src/test/mir-opt/dataflow-const-prop/sibling_ptr.rs b/src/test/mir-opt/dataflow-const-prop/sibling_ptr.rs
new file mode 100644
index 000000000..87ef00d18
--- /dev/null
+++ b/src/test/mir-opt/dataflow-const-prop/sibling_ptr.rs
@@ -0,0 +1,11 @@
+// unit-test: DataflowConstProp
+
+// EMIT_MIR sibling_ptr.main.DataflowConstProp.diff
+fn main() {
+    let mut x: (u8, u8) = (0, 0);
+    unsafe {
+        let p = std::ptr::addr_of_mut!(x.0);
+        *p.add(1) = 1;
+    }
+    let x1 = x.1;  // should not be propagated
+}