Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/mir-opt/dest-prop/cycle.rs b/tests/mir-opt/dest-prop/cycle.rs
new file mode 100644
index 000000000..6182878f3
--- /dev/null
+++ b/tests/mir-opt/dest-prop/cycle.rs
@@ -0,0 +1,15 @@
+//! Tests that cyclic assignments don't hang DestinationPropagation, and result in reasonable code.
+// unit-test: DestinationPropagation
+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);
+}