Optimize type checks of list and map literals.

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart.h"
@@ skipping 739 matching lines @@
   }
   const Object& obj = Object::Handle(Api::UnwrapHandle(object));
   Instance& instance = Instance::Handle();
   instance ^= obj.raw();
   // Finalize all classes.
   const char* msg = CheckIsolateState(isolate);
   if (msg != NULL) {
     return Api::Error(msg);
   }
   const Type& type = Type::Handle(Type::NewNonParameterizedType(cls));
-  *value = instance.Is(type);
+  *value = instance.IsInstanceOf(type, TypeArguments::Handle());
   return Api::Success();
 }
 
 
 // --- Numbers ----
 
 
 // TODO(iposva): The argument should be an instance.
 DART_EXPORT bool Dart_IsNumber(Dart_Handle object) {
   DARTSCOPE(Isolate::Current());
@@ skipping 351 matching lines @@
 
 
 // --- Lists ---
 
 
 static RawInstance* GetListInstance(Isolate* isolate, const Object& obj) {
   if (obj.IsInstance()) {
     Instance& instance = Instance::Handle();
     instance ^= obj.raw();
     const Type& type = Type::Handle(isolate->object_store()->list_interface());
-    return instance.Is(type) ? instance.raw() : Instance::null();
+    if (instance.IsInstanceOf(type, TypeArguments::Handle())) {
+      return instance.raw();
+    }
   }
   return Instance::null();
 }
 
 
 DART_EXPORT bool Dart_IsList(Dart_Handle object) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   const Object& obj = Object::Handle(Api::UnwrapHandle(object));
   // TODO(5526318): Make access to GrowableObjectArray more efficient.
@@ skipping 1152 matching lines @@
     }
     delete debug_region;
   } else {
     *buffer = NULL;
     *buffer_size = 0;
   }
 }
 
 
 }  // namespace dart