Check for a passed-in type argument vector in the prolog of generic functions.

runtime/vm/object.h

 // Copyright (c) 2012, 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.
 
 #ifndef RUNTIME_VM_OBJECT_H_
 #define RUNTIME_VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1878 matching lines @@
   void SetOriginal(const ICData& value) const;
 
   bool IsOriginal() const { return Original() == this->raw(); }
 
   RawString* target_name() const { return raw_ptr()->target_name_; }
 
   RawArray* arguments_descriptor() const { return raw_ptr()->args_descriptor_; }
 
   intptr_t NumArgsTested() const;
 
+  intptr_t TypeArgsLen() const;
+
   intptr_t deopt_id() const {
 #if defined(DART_PRECOMPILED_RUNTIME)
     UNREACHABLE();
     return -1;
 #else
     return raw_ptr()->deopt_id_;
 #endif
   }
 
   bool IsImmutable() const;
@@ skipping 7158 matching lines @@
 
 inline void TypeArguments::SetHash(intptr_t value) const {
   // This is only safe because we create a new Smi, which does not cause
   // heap allocation.
   StoreSmi(&raw_ptr()->hash_, Smi::New(value));
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_H_