1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/mir-opt/dest-prop/cycle.rs b/src/test/mir-opt/dest-prop/cycle.rs
new file mode 100644
index 000000000..c9187d408
--- /dev/null
+++ b/src/test/mir-opt/dest-prop/cycle.rs
@@ -0,0 +1,15 @@
+//! Tests that cyclic assignments don't hang DestinationPropagation, and result in reasonable code.
+// compile-flags: -Zunsound-mir-opts
+fn val() -> i32 {
+    1
+}
+
+// EMIT_MIR cycle.main.DestinationPropagation.diff
+fn main() {
+    let mut x = val();
+    let y = x;
+    let z = y;
+    x = z;
+
+    drop(x);
+}