Add repr(u8) to the test

src/test/run-pass/repr_c_int_align.rs

@@ -18,6 +18,12 @@ enum ReprCu8 {
     B,
 }
 
+#[repr(u8)]
+enum Repru8 {
+    A(u16),
+    B,
+}
+
 #[repr(C)]
 struct ReprC {
     tag: u8,
@@ -26,6 +32,7 @@ struct ReprC {
 }
 
 fn main() {
+    // Test `repr(C, u8)`.
     let r1 = ReprC { tag: 0, padding: 0, payload: 0 };
     let r2 = ReprC { tag: 0, padding: 1, payload: 1 };
 
@@ -36,4 +43,13 @@ fn main() {
         (ReprCu8::A(_), ReprCu8::A(_)) => (),
         _ => assert!(false)
     };
+
+    // Test `repr(u8)`.
+    let t1: &Repru8 = unsafe { std::mem::transmute(&r1) };
+    let t2: &Repru8 = unsafe { std::mem::transmute(&r2) };
+
+    match (t1, t2) {
+        (Repru8::A(_), Repru8::A(_)) => (),
+        _ => assert!(false)
+    };
 }