Remove FieldType::Iterator.

src/crankshaft/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 6345 matching lines @@
 bool HOptimizedGraphBuilder::PropertyAccessInfo::LoadFieldMaps(
     Handle<Map> map) {
   // Clear any previously collected field maps/type.
   field_maps_.Clear();
   field_type_ = HType::Tagged();
 
   // Figure out the field type from the accessor map.
   Handle<FieldType> field_type = GetFieldTypeFromMap(map);
 
   // Collect the (stable) maps from the field type.
-  int num_field_maps = field_type->ClassCount();
-  if (num_field_maps > 0) {
+  if (field_type->IsClass()) {
     DCHECK(access_.representation().IsHeapObject());
-    field_maps_.Reserve(num_field_maps, zone());
-    FieldType::Iterator it = field_type->Classes();
-    while (!it.Done()) {
-      Handle<Map> field_map = it.Current();
-      if (!field_map->is_stable()) {
-        field_maps_.Clear();
-        break;
-      }
+    Handle<Map> field_map = field_type->AsClass();
+    if (field_map->is_stable()) {
       field_maps_.Add(field_map, zone());
-      it.Advance();
     }
   }
 
   if (field_maps_.is_empty()) {
     // Store is not safe if the field map was cleared.
     return IsLoad() || !field_type->IsNone();
   }
 
-  field_maps_.Sort();
-  DCHECK_EQ(num_field_maps, field_maps_.length());
-
   // Determine field HType from field type.
   field_type_ = HType::FromFieldType(field_type, zone());
   DCHECK(field_type_.IsHeapObject());
 
   // Add dependency on the map that introduced the field.
   top_info()->dependencies()->AssumeFieldType(GetFieldOwnerFromMap(map));
   return true;
 }
 
 
@@ skipping 7238 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8