Support runtime check of function types.

sdk/lib/_internal/compiler/implementation/enqueue.dart

Index: sdk/lib/_internal/compiler/implementation/enqueue.dart
diff --git a/sdk/lib/_internal/compiler/implementation/enqueue.dart b/sdk/lib/_internal/compiler/implementation/enqueue.dart
index 116036ada62ed5f336f7cdc495a37c95470b12a5..5188f9c3b1741343dae444966a6c182fa202931d 100644
--- a/sdk/lib/_internal/compiler/implementation/enqueue.dart
+++ b/sdk/lib/_internal/compiler/implementation/enqueue.dart
@@ -129,7 +129,7 @@ abstract class Enqueuer {
     if (element.isGetter() && element.name == Compiler.RUNTIME_TYPE) {
       compiler.enabledRuntimeType = true;
       // TODO(ahe): Record precise dependency here.
-      compiler.backend.registerRuntimeType(compiler.globalDependencies);
+      compiler.backend.registerRuntimeType(this, compiler.globalDependencies);
     } else if (element == compiler.functionApplyMethod) {
       compiler.enabledFunctionApply = true;
     } else if (element == compiler.invokeOnMethod) {
@@ -252,10 +252,21 @@ abstract class Enqueuer {
       if (member.name == Compiler.NO_SUCH_METHOD) {
         enableNoSuchMethod(member);
       }
+      if (member.name == Compiler.CALL_OPERATOR_NAME) {
+        if (!cls.typeVariables.isEmpty) {
+          registerGenericCallMethod(member, compiler.globalDependencies);
+        }
+      }
+      if (universe.hasInvocation(member, compiler)) {
+        return addToWorkList(member);
+      }
       // If there is a property access with the same name as a method we
       // need to emit the method.
       if (universe.hasInvokedGetter(member, compiler)) {
-        // We will emit a closure, so make sure the bound closure class is
+        if (!cls.typeVariables.isEmpty) {
+          registerGenericClosure(member, compiler.globalDependencies);
+        }
+        // We will emit a closure, so make sure the closure class is
         // generated.
         registerInstantiatedClass(compiler.boundClosureClass,
                                   // Precise dependency is not important here.
@@ -411,11 +422,12 @@ abstract class Enqueuer {
     String memberName = n.slowToString();
     Link<Element> members = map[memberName];
     if (members != null) {
+      map[memberName] = const Link<Element>();
       LinkBuilder<Element> remaining = new LinkBuilder<Element>();
       for (; !members.isEmpty; members = members.tail) {
         if (!f(members.head)) remaining.addLast(members.head);
       }
-      map[memberName] = remaining.toLink();
+      map[memberName] = remaining.toLink(map[memberName]);
     }
   }
 
@@ -430,6 +442,11 @@ abstract class Enqueuer {
   void handleUnseenSelector(SourceString methodName, Selector selector) {
     processInstanceMembers(methodName, (Element member) {
       if (selector.appliesUnnamed(member, compiler)) {
+        if (member.isFunction() && selector.isGetter()) {
+          if (!member.getEnclosingClass().typeVariables.isEmpty) {
+            registerGenericClosure(member, compiler.globalDependencies);
+          }
+        }
         if (member.isField() && member.getEnclosingClass().isNative()) {
           if (selector.isGetter() || selector.isCall()) {
             nativeEnqueuer.registerFieldLoad(member);
@@ -540,12 +557,15 @@ abstract class Enqueuer {
   }
 
   void registerIsCheck(DartType type, TreeElements elements) {
+    type = type.unalias(compiler);
     // Even in checked mode, type annotations for return type and argument
     // types do not imply type checks, so there should never be a check
     // against the type variable of a typedef.
     assert(type.kind != TypeKind.TYPE_VARIABLE ||
            !type.element.enclosingElement.isTypedef());
-    universe.isChecks.add(type);
+    if (!type.isMalformed) {
+      universe.isChecks.add(type);
+    }
     compiler.backend.registerIsCheck(type, this, elements);
   }
 
@@ -563,6 +583,16 @@ abstract class Enqueuer {
     compiler.backend.registerAsCheck(type, elements);
   }
 
+  void registerGenericCallMethod(Element element, TreeElements elements) {
+    compiler.backend.registerGenericCallMethod(element, this, elements);
+    universe.genericCallMethods.add(element);
+  }
+
+  void registerGenericClosure(Element element, TreeElements elements) {
+    compiler.backend.registerGenericClosure(element, this, elements);
+    universe.closurizedGenericMembers.add(element);
+  }
+
   void forEach(f(WorkItem work));
 
   void forEachPostProcessTask(f(PostProcessTask work)) {}