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

src/test/ui/unreachable-code-1.rs

@@ -0,0 +1,19 @@
+// run-pass
+
+#![allow(unused_must_use)]
+#![allow(unreachable_code)]
+
+#![allow(unused_variables)]
+#![allow(dead_code)]
+
+fn id(x: bool) -> bool { x }
+
+fn call_id() {
+    let c = panic!();
+    id(c);
+}
+
+fn call_id_3() { id(return) && id(return); }
+
+pub fn main() {
+}