tests: Move run-pass tests without naming conflicts to ui

src/test/ui/packed/packed-tuple-struct-layout.rs

@@ -0,0 +1,21 @@
+// run-pass
+use std::mem;
+
+#[repr(packed)]
+struct S4(u8,[u8; 3]);
+
+#[repr(packed)]
+struct S5(u8,u32);
+
+pub fn main() {
+    unsafe {
+        let s4 = S4(1, [2,3,4]);
+        let transd : [u8; 4] = mem::transmute(s4);
+        assert_eq!(transd, [1, 2, 3, 4]);
+
+        let s5 = S5(1, 0xff_00_00_ff);
+        let transd : [u8; 5] = mem::transmute(s5);
+        // Don't worry about endianness, the u32 is palindromic.
+        assert_eq!(transd, [1, 0xff, 0, 0, 0xff]);
+    }
+}