Eliminate type checks that can successfully be performed at compile time.

runtime/vm/code_generator_x64.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 VM_CODE_GENERATOR_X64_H_
 #define VM_CODE_GENERATOR_X64_H_
 
 #ifndef VM_CODE_GENERATOR_H_
 #error Do not include code_generator_x64.h directly; use code_generator.h.
 #endif
@@ skipping 146 matching lines @@
   // the number of call arguments that are being checked in the inline cache.
   void GenerateInstanceCall(intptr_t node_id,
                             intptr_t token_index,
                             const String& function_name,
                             int num_arguments,
                             const Array& optional_arguments_names,
                             intptr_t num_args_checked);
 
   void GenerateInstanceOf(intptr_t node_id,
                           intptr_t token_index,
+                          AstNode* value,
                           const AbstractType& type,
                           bool negate_result);
   void GenerateAssertAssignable(intptr_t node_id,
                                 intptr_t token_index,
+                                AstNode* value,
                                 const AbstractType& dst_type,
                                 const String& dst_name);
   void GenerateArgumentTypeChecks();
   void GenerateConditionTypeCheck(intptr_t node_id, intptr_t token_index);
 
   void GenerateInstantiatorTypeArguments(intptr_t token_index);
   void GenerateTypeArguments(ConstructorCallNode* node,
                              bool is_cls_parameterized);
 
   void TestClassAndJump(const Class& cls, Label *label);
@@ skipping 39 matching lines @@
   // allocated and chained to the list of contexts.
   intptr_t context_level_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CodeGenerator);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_CODE_GENERATOR_X64_H_