Replace HCheckPrototypeMaps by explicit map checks of constant values.

src/objects-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 348 matching lines @@
   MapVerify();
   CHECK(is_shared());
   CHECK(instance_descriptors()->IsEmpty());
   CHECK_EQ(0, pre_allocated_property_fields());
   CHECK_EQ(0, unused_property_fields());
   CHECK_EQ(StaticVisitorBase::GetVisitorId(instance_type(), instance_size()),
       visitor_id());
 }
 
 
-void Map::VerifyOmittedPrototypeChecks() {
-  if (!FLAG_omit_prototype_checks_for_leaf_maps) return;
-  if (HasTransitionArray() || is_dictionary_map()) {
+void Map::VerifyOmittedMapChecks() {
+  if (!FLAG_omit_map_checks_for_leaf_maps) return;
+  if (!is_stable() ||
+      is_deprecated() ||
+      HasTransitionArray() ||
+      is_dictionary_map()) {
     CHECK_EQ(0, dependent_code()->number_of_entries(
         DependentCode::kPrototypeCheckGroup));
   }
 }
 
 
 void CodeCache::CodeCacheVerify() {
   VerifyHeapPointer(default_cache());
   VerifyHeapPointer(normal_type_cache());
   CHECK(default_cache()->IsFixedArray());
@@ skipping 787 matching lines @@
   for (int i = 0; i < number_of_transitions(); ++i) {
     if (!CheckOneBackPointer(current_map, GetTarget(i))) return false;
   }
   return true;
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal