add StorageDead handling

src/test/compile-fail/borrowck/borrowck-storage-dead.rs

@@ -0,0 +1,30 @@
+// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-flags: -Z emit-end-regions -Z borrowck-mir
+
+fn ok() {
+    loop {
+        let _x = 1;
+    }
+}
+
+fn fail() {
+    loop {
+        let x: i32;
+        let _ = x + 1; //~ERROR (Ast) [E0381]
+                       //~^ ERROR (Mir) [E0381]
+    }
+}
+
+fn main() {
+    ok();
+    fail();
+}