Further improve type optimization reusing the type argument vector of the

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 3603 matching lines @@
   const AbstractType& type_;
 
   DISALLOW_COPY_AND_ASSIGN(StoreVMFieldInstr);
 };
 
 
 class InstantiateTypeArgumentsInstr : public TemplateDefinition<1> {
  public:
   InstantiateTypeArgumentsInstr(intptr_t token_pos,
                                 const AbstractTypeArguments& type_arguments,
+                                const Class& instantiator_class,
                                 Value* instantiator)
       : token_pos_(token_pos),
-        type_arguments_(type_arguments) {
+        type_arguments_(type_arguments),
+        instantiator_class_(instantiator_class) {
     ASSERT(type_arguments.IsZoneHandle());
     SetInputAt(0, instantiator);
   }
 
   DECLARE_INSTRUCTION(InstantiateTypeArguments)
 
   Value* instantiator() const { return inputs_[0]; }
   const AbstractTypeArguments& type_arguments() const {
     return type_arguments_;
   }
+  const Class& instantiator_class() const { return instantiator_class_; }
   intptr_t token_pos() const { return token_pos_; }
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return true; }
 
   virtual bool HasSideEffect() const { return true; }
 
  private:
   const intptr_t token_pos_;
   const AbstractTypeArguments& type_arguments_;
+  const Class& instantiator_class_;
 
   DISALLOW_COPY_AND_ASSIGN(InstantiateTypeArgumentsInstr);
 };
 
 
 class ExtractConstructorTypeArgumentsInstr : public TemplateDefinition<1> {
  public:
   ExtractConstructorTypeArgumentsInstr(
       intptr_t token_pos,
       const AbstractTypeArguments& type_arguments,
+      const Class& instantiator_class,
       Value* instantiator)
       : token_pos_(token_pos),
-        type_arguments_(type_arguments) {
+        type_arguments_(type_arguments),
+        instantiator_class_(instantiator_class) {
     SetInputAt(0, instantiator);
   }
 
   DECLARE_INSTRUCTION(ExtractConstructorTypeArguments)
 
   Value* instantiator() const { return inputs_[0]; }
   const AbstractTypeArguments& type_arguments() const {
     return type_arguments_;
   }
+  const Class& instantiator_class() const { return instantiator_class_; }
   intptr_t token_pos() const { return token_pos_; }
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual bool HasSideEffect() const { return false; }
 
  private:
   const intptr_t token_pos_;
   const AbstractTypeArguments& type_arguments_;
+  const Class& instantiator_class_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtractConstructorTypeArgumentsInstr);
 };
 
 
 class ExtractConstructorInstantiatorInstr : public TemplateDefinition<1> {
  public:
   ExtractConstructorInstantiatorInstr(ConstructorCallNode* ast_node,
+                                      const Class& instantiator_class,
                                       Value* instantiator)
-      : ast_node_(*ast_node) {
+      : ast_node_(*ast_node), instantiator_class_(instantiator_class) {
     SetInputAt(0, instantiator);
   }
 
   DECLARE_INSTRUCTION(ExtractConstructorInstantiator)
 
   Value* instantiator() const { return inputs_[0]; }
   const AbstractTypeArguments& type_arguments() const {
     return ast_node_.type_arguments();
   }
   const Function& constructor() const { return ast_node_.constructor(); }
+  const Class& instantiator_class() const { return instantiator_class_; }
   intptr_t token_pos() const { return ast_node_.token_pos(); }
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual bool HasSideEffect() const { return false; }
 
  private:
   const ConstructorCallNode& ast_node_;
+  const Class& instantiator_class_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtractConstructorInstantiatorInstr);
 };
 
 
 class AllocateContextInstr : public TemplateDefinition<0> {
  public:
   AllocateContextInstr(intptr_t token_pos,
                        intptr_t num_context_variables)
       : token_pos_(token_pos),
@@ skipping 1565 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_