Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 22 insertions, 0 deletions

diff --git a/tests/mir-opt/dead-store-elimination/cycle.rs b/tests/mir-opt/dead-store-elimination/cycle.rs
new file mode 100644
index 000000000..b35ce0bcb
--- /dev/null
+++ b/tests/mir-opt/dead-store-elimination/cycle.rs
@@ -0,0 +1,22 @@
+// unit-test: DeadStoreElimination
+
+#[inline(never)]
+fn cond() -> bool {
+    false
+}
+
+// EMIT_MIR cycle.cycle.DeadStoreElimination.diff
+fn cycle(mut x: i32, mut y: i32, mut z: i32) {
+    // This example is interesting because the non-transitive version of `MaybeLiveLocals` would
+    // report that *all* of these stores are live.
+    while cond() {
+        let temp = z;
+        z = y;
+        y = x;
+        x = temp;
+    }
+}
+
+fn main() {
+    cycle(1, 2, 3);
+}