1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/mir-opt/building/custom/arbitrary_let.rs b/src/test/mir-opt/building/custom/arbitrary_let.rs
new file mode 100644
index 000000000..776df3151
--- /dev/null
+++ b/src/test/mir-opt/building/custom/arbitrary_let.rs
@@ -0,0 +1,28 @@
+#![feature(custom_mir, core_intrinsics)]
+
+extern crate core;
+use core::intrinsics::mir::*;
+use core::ptr::{addr_of, addr_of_mut};
+
+// EMIT_MIR arbitrary_let.arbitrary_let.built.after.mir
+#[custom_mir(dialect = "built")]
+fn arbitrary_let(x: i32) -> i32 {
+    mir!(
+        {
+            let y = x;
+            Goto(second)
+        }
+        third = {
+            RET = z;
+            Return()
+        }
+        second = {
+            let z = y;
+            Goto(third)
+        }
+    )
+}
+
+fn main() {
+    assert_eq!(arbitrary_let(5), 5);
+}