1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/intrinsics/intrinsic-assume.rs b/src/test/ui/intrinsics/intrinsic-assume.rs
new file mode 100644
index 000000000..3c9d70cb5
--- /dev/null
+++ b/src/test/ui/intrinsics/intrinsic-assume.rs
@@ -0,0 +1,17 @@
+// run-pass
+#![feature(core_intrinsics)]
+
+use std::intrinsics::assume;
+
+unsafe fn f(x: i32) -> i32 {
+    assume(x == 34);
+    match x {
+        34 => 42,
+        _  => 30
+    }
+}
+
+fn main() {
+    let x = unsafe { f(34) };
+    assert_eq!(x, 42);
+}