Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 21 insertions, 0 deletions

diff --git a/tests/ui/lint/lint-invalid-atomic-ordering-fence.rs b/tests/ui/lint/lint-invalid-atomic-ordering-fence.rs
new file mode 100644
index 000000000..22034472c
--- /dev/null
+++ b/tests/ui/lint/lint-invalid-atomic-ordering-fence.rs
@@ -0,0 +1,21 @@
+// only-x86_64
+use std::sync::atomic::{compiler_fence, fence, Ordering};
+
+fn main() {
+    // Allowed ordering modes
+    fence(Ordering::Acquire);
+    fence(Ordering::Release);
+    fence(Ordering::AcqRel);
+    fence(Ordering::SeqCst);
+
+    compiler_fence(Ordering::Acquire);
+    compiler_fence(Ordering::Release);
+    compiler_fence(Ordering::AcqRel);
+    compiler_fence(Ordering::SeqCst);
+
+    // Disallowed ordering modes
+    fence(Ordering::Relaxed);
+    //~^ ERROR memory fences cannot have `Relaxed` ordering
+    compiler_fence(Ordering::Relaxed);
+    //~^ ERROR memory fences cannot have `Relaxed` ordering
+}