1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/consts/const-compare-bytes.rs b/tests/ui/consts/const-compare-bytes.rs
new file mode 100644
index 000000000..74e29f813
--- /dev/null
+++ b/tests/ui/consts/const-compare-bytes.rs
@@ -0,0 +1,27 @@
+// run-pass
+
+#![feature(core_intrinsics)]
+#![feature(const_intrinsic_compare_bytes)]
+use std::intrinsics::compare_bytes;
+
+fn main() {
+    const A: i32 = unsafe {
+        compare_bytes(1 as *const u8, 2 as *const u8, 0)
+    };
+    assert_eq!(A, 0);
+
+    const B: i32 = unsafe {
+        compare_bytes([1, 2].as_ptr(), [1, 3].as_ptr(), 1)
+    };
+    assert_eq!(B, 0);
+
+    const C: i32 = unsafe {
+        compare_bytes([1, 2, 9].as_ptr(), [1, 3, 8].as_ptr(), 2)
+    };
+    assert!(C < 0);
+
+    const D: i32 = unsafe {
+        compare_bytes([1, 3, 8].as_ptr(), [1, 2, 9].as_ptr(), 2)
+    };
+    assert!(D > 0);
+}