Divide up metadata into separate DepNodes

src/librustc/dep_graph/dep_node.rs

@@ -80,7 +80,7 @@ macro_rules! define_dep_nodes {
     ($(
         $variant:ident $(( $($tuple_arg:tt),* ))*
                        $({ $($struct_arg_name:ident : $struct_arg_ty:ty),* })*
-      ),*
+      ,)*
     ) => (
         #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash,
                  RustcEncodable, RustcDecodable)]
@@ -421,7 +421,11 @@ define_dep_nodes!(
     IsExportedSymbol(DefId),
     IsMirAvailable(DefId),
     ItemAttrs(DefId),
-    FnArgNames(DefId)
+    FnArgNames(DefId),
+    DylibDepFormats(DefId),
+    IsAllocator(DefId),
+    IsPanicRuntime(DefId),
+    ExternCrate(DefId),
 );
 
 trait DepNodeParams<'a, 'gcx: 'tcx + 'a, 'tcx: 'a> {

src/librustc/ty/maps.rs

@@ -964,13 +964,13 @@ define_maps! { <'tcx>
     [] layout_raw: layout_dep_node(ty::ParamEnvAnd<'tcx, Ty<'tcx>>)
                                   -> Result<&'tcx Layout, LayoutError<'tcx>>,
 
-    [] dylib_dependency_formats: MetaData(DefId)
+    [] dylib_dependency_formats: DylibDepFormats(DefId)
                                     -> Rc<Vec<(CrateNum, LinkagePreference)>>,
 
-    [] is_allocator: MetaData(DefId) -> bool,
-    [] is_panic_runtime: MetaData(DefId) -> bool,
+    [] is_allocator: IsAllocator(DefId) -> bool,
+    [] is_panic_runtime: IsPanicRuntime(DefId) -> bool,
 
-    [] extern_crate: MetaData(DefId) -> Rc<Option<ExternCrate>>,
+    [] extern_crate: ExternCrate(DefId) -> Rc<Option<ExternCrate>>,
 }
 
 fn type_param_predicates((item_id, param_id): (DefId, DefId)) -> DepConstructor {