Remove an unused input operand from ExtractConstructorInstantiator.

vm/intermediate_language.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_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 1009 matching lines @@
 
  private:
   const intptr_t token_index_;
   const intptr_t try_index_;
   const AbstractTypeArguments& type_arguments_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtractConstructorTypeArgumentsComp);
 };
 
 
-class ExtractConstructorInstantiatorComp : public TemplateComputation<2> {
+class ExtractConstructorInstantiatorComp : public TemplateComputation<1> {
  public:
   ExtractConstructorInstantiatorComp(ConstructorCallNode* ast_node,
-                                     Value* instantiator,
-                                     Value* discard_value)
+                                     Value* instantiator)
       : ast_node_(*ast_node) {
     ASSERT(instantiator != NULL);
     inputs_[0] = instantiator;
-    inputs_[1] = discard_value;
   }
 
   DECLARE_COMPUTATION(ExtractConstructorInstantiator)
 
   Value* instantiator() { return inputs_[0]; }
-  Value* discard_value() { return inputs_[1]; }
   const AbstractTypeArguments& type_arguments() const {
     return ast_node_.type_arguments();
   }
   const Function& constructor() const { return ast_node_.constructor(); }
   intptr_t token_index() const { return ast_node_.token_index(); }
 
  private:
   const ConstructorCallNode& ast_node_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtractConstructorInstantiatorComp);
@@ skipping 616 matching lines @@
   const GrowableArray<BlockEntryInstr*>& block_order_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_