1 files changed, 50 insertions, 0 deletions
diff --git a/tests/ui/lint/lint-invalid-atomic-ordering-exchange-weak.rs b/tests/ui/lint/lint-invalid-atomic-ordering-exchange-weak.rs
new file mode 100644
index 00000000000..63204c725c3
--- /dev/null
+++ b/tests/ui/lint/lint-invalid-atomic-ordering-exchange-weak.rs
@@ -0,0 +1,50 @@
+// only-x86_64
+use std::sync::atomic::{AtomicPtr, Ordering};
+
+fn main() {
+    let ptr = &mut 5;
+    let ptr2 = &mut 10;
+    // `compare_exchange_weak` testing
+    let x = AtomicPtr::new(ptr);
+
+    // Allowed ordering combos
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Relaxed);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Acquire);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::SeqCst);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Relaxed);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Acquire);
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::SeqCst);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Relaxed);
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::Acquire);
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::SeqCst);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Relaxed);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Acquire);
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::SeqCst);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Relaxed);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Acquire);
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::SeqCst);
+
+    // AcqRel is always forbidden as a failure ordering
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Relaxed, Ordering::AcqRel);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Acquire, Ordering::AcqRel);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::Release, Ordering::AcqRel);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::AcqRel, Ordering::AcqRel);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr2, ptr, Ordering::SeqCst, Ordering::AcqRel);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+
+    // Release is always forbidden as a failure ordering
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Relaxed, Ordering::Release);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Acquire, Ordering::Release);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::Release, Ordering::Release);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::AcqRel, Ordering::Release);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+    let _ = x.compare_exchange_weak(ptr, ptr2, Ordering::SeqCst, Ordering::Release);
+    //~^ ERROR `compare_exchange_weak`'s failure ordering may not be `Release` or `AcqRel`
+}