Start porting fast typechecks to x64.

runtime/vm/flow_graph_builder.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_FLOW_GRAPH_BUILDER_H_
 #define VM_FLOW_GRAPH_BUILDER_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 118 matching lines @@
       intptr_t token_index,
       const AbstractTypeArguments& type_arguments);
 
   // Creates a possibly uninstantiated type argument vector and the type
   // argument vector of the instantiator (two values in 'args') used in
   // preparation of a constructor call.
   // May be called only if allocating an object of a parameterized class.
   void BuildConstructorTypeArguments(ConstructorCallNode* node,
                                      ZoneGrowableArray<Value*>* args);
 
-  // Returns the value of the type arguments of the instantiator.
-  Value* BuildInstantiatorTypeArguments(intptr_t token_index);
+  void BuildTypecheckArguments(intptr_t token_index,
+                               Value** instantiator,
+                               Value** instantiator_type_arguments);
+  Value* BuildInstantiator();
+  Value* BuildInstantiatorTypeArguments(intptr_t token_index,
+                                        Value* instantiator);
 
   // Perform a type check on the given value.
-  void BuildAssertAssignable(intptr_t token_index,
-                             Value* value,
-                             const AbstractType& dst_type,
-                             const String& dst_name);
+  AssertAssignableComp* BuildAssertAssignable(intptr_t token_index,
+                                              Value* value,
+                                              const AbstractType& dst_type,
+                                              const String& dst_name);
 
   // Perform a type check on the given value and return it.
-  Value* BuildAssignableValue(AstNode* value_node,
+  Value* BuildAssignableValue(intptr_t token_index,
                               Value* value,
                               const AbstractType& dst_type,
                               const String& dst_name);
 
   virtual void BuildInstanceOf(ComparisonNode* node);
 
   bool MustSaveRestoreContext(SequenceNode* node) const;
 
   // Moves parent context into the context register.
   void UnchainContext();
@@ skipping 130 matching lines @@
   // Output parameters.
   TargetEntryInstr** true_successor_address_;
   TargetEntryInstr** false_successor_address_;
 
   intptr_t condition_token_index_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_BUILDER_H_