1 files changed, 39 insertions, 0 deletions
diff --git a/tests/mir-opt/building/custom/simple_assign.rs b/tests/mir-opt/building/custom/simple_assign.rs
new file mode 100644
index 000000000..db041aab2
--- /dev/null
+++ b/tests/mir-opt/building/custom/simple_assign.rs
@@ -0,0 +1,39 @@
+#![feature(custom_mir, core_intrinsics)]
+
+extern crate core;
+use core::intrinsics::mir::*;
+
+// EMIT_MIR simple_assign.simple.built.after.mir
+#[custom_mir(dialect = "built")]
+pub fn simple(x: i32) -> i32 {
+    mir!(
+        let temp1: i32;
+        let temp2: _;
+
+        {
+            StorageLive(temp1);
+            temp1 = x;
+            Goto(exit)
+        }
+
+        exit = {
+            temp2 = Move(temp1);
+            StorageDead(temp1);
+            RET = temp2;
+            Return()
+        }
+    )
+}
+
+// EMIT_MIR simple_assign.simple_ref.built.after.mir
+#[custom_mir(dialect = "built")]
+pub fn simple_ref(x: &mut i32) -> &mut i32 {
+    mir!({
+        RET = Move(x);
+        Return()
+    })
+}
+
+fn main() {
+    assert_eq!(5, simple(5));
+}