convert MIR to iterate over the bodies vector

src/librustc/dep_graph/dep_node.rs

@@ -89,6 +89,7 @@ pub enum DepNode<D: Clone + Debug> {
 
     // Represents the MIR for a fn; also used as the task node for
     // things read/modify that MIR.
+    MirKrate,
     Mir(D),
 
     BorrowCheckKrate,
@@ -212,6 +213,7 @@ impl<D: Clone + Debug> DepNode<D> {
         match *self {
             Krate => Some(Krate),
             BorrowCheckKrate => Some(BorrowCheckKrate),
+            MirKrate => Some(MirKrate),
             TypeckBodiesKrate => Some(TypeckBodiesKrate),
             CollectLanguageItems => Some(CollectLanguageItems),
             CheckStaticRecursion => Some(CheckStaticRecursion),