Clean up LoadInstanceField and StoreInstanceField.

runtime/vm/flow_graph_builder.cc

 // 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.
 
 #include "vm/flow_graph_builder.h"
 
 #include "vm/ast_printer.h"
 #include "vm/code_descriptors.h"
 #include "vm/dart_entry.h"
 #include "vm/flags.h"
@@ skipping 1968 matching lines @@
   ReturnComputation(store);
 }
 
 
 void EffectGraphVisitor::VisitLoadInstanceFieldNode(
     LoadInstanceFieldNode* node) {
   ValueGraphVisitor for_instance(owner(), temp_index());
   node->instance()->Visit(&for_instance);
   Append(for_instance);
   LoadInstanceFieldComp* load = new LoadInstanceFieldComp(
-      node->field(), for_instance.value(), NULL);  // Can not deoptimize.
+      node->field(), for_instance.value());
   ReturnComputation(load);
 }
 
 
 void EffectGraphVisitor::VisitStoreInstanceFieldNode(
     StoreInstanceFieldNode* node) {
   ValueGraphVisitor for_instance(owner(), temp_index());
   node->instance()->Visit(&for_instance);
   Append(for_instance);
   ValueGraphVisitor for_value(owner(), for_instance.temp_index());
   node->value()->Visit(&for_value);
   Append(for_value);
   Value* store_value = for_value.value();
   if (FLAG_enable_type_checks) {
     const AbstractType& type = AbstractType::ZoneHandle(node->field().type());
     const String& dst_name = String::ZoneHandle(node->field().name());
     store_value = BuildAssignableValue(node->value()->token_pos(),
                                        store_value,
                                        type,
                                        dst_name);
   }
   StoreInstanceFieldComp* store = new StoreInstanceFieldComp(
-      node->field(), for_instance.value(), store_value, NULL);
+      node->field(), for_instance.value(), store_value);
   ReturnComputation(store);
 }
 
 
 // StoreInstanceFieldNode does not return result.
 void ValueGraphVisitor::VisitStoreInstanceFieldNode(
     StoreInstanceFieldNode* node) {
   UNIMPLEMENTED();
 }
 
@@ skipping 403 matching lines @@
   intptr_t len = OS::SNPrint(NULL, 0, kFormat, function_name, reason) + 1;
   char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
   OS::SNPrint(chars, len, kFormat, function_name, reason);
   const Error& error = Error::Handle(
       LanguageError::New(String::Handle(String::New(chars))));
   Isolate::Current()->long_jump_base()->Jump(1, error);
 }
 
 
 }  // namespace dart