Optimize StoreIndexedComp on ia32&x64.

runtime/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 860 matching lines @@
 // Not simply an InstanceCall because it has somewhat more complicated
 // semantics: the value operand is preserved before the call.
 class StoreIndexedComp : public TemplateComputation<3> {
  public:
   StoreIndexedComp(intptr_t token_index,
                    intptr_t try_index,
                    Value* array,
                    Value* index,
                    Value* value)
       : token_index_(token_index),
-        try_index_(try_index) {
+        try_index_(try_index),
+        receiver_type_(kIllegalObjectKind) {
     inputs_[0] = array;
     inputs_[1] = index;
     inputs_[2] = value;
   }
 
   DECLARE_COMPUTATION(StoreIndexed)
 
   intptr_t token_index() const { return token_index_; }
   intptr_t try_index() const { return try_index_; }
   Value* array() const { return inputs_[0]; }
   Value* index() const { return inputs_[1]; }
   Value* value() const { return inputs_[2]; }
 
+  void set_receiver_type(ObjectKind receiver_type) {
+    receiver_type_ = receiver_type;
+  }
+
+  ObjectKind receiver_type() const {
+    return receiver_type_;
+  }
+
  private:
   const intptr_t token_index_;
   const intptr_t try_index_;
+  ObjectKind receiver_type_;
 
   DISALLOW_COPY_AND_ASSIGN(StoreIndexedComp);
 };
 
 
 // Not simply an InstanceCall because it has somewhat more complicated
 // semantics: the value operand is preserved before the call.
 class InstanceSetterComp : public TemplateComputation<2> {
  public:
   InstanceSetterComp(intptr_t token_index,
@@ skipping 1252 matching lines @@
   const GrowableArray<BlockEntryInstr*>& block_order_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_