[turbofan] Add fast path for cached property names.

src/compiler/access-info.cc

 // Copyright 2015 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 <ostream>
 
 #include "src/accessors.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-info.h"
 #include "src/compiler/type-cache.h"
@@ skipping 355 matching lines @@
           if (!accessor->IsJSFunction()) {
             CallOptimization optimization(accessor);
             if (!optimization.is_simple_api_call()) {
               return false;
             }
             if (optimization.api_call_info()->fast_handler()->IsCode()) {
               return false;
             }
             if (V8_UNLIKELY(FLAG_runtime_stats)) return false;
           }
+          if (access_mode == AccessMode::kLoad) {
+            Handle<Name> cached_property_name;
+            if (FunctionTemplateInfo::TryGetCachedPropertyName(isolate(),
+                                                               accessor)
+                    .ToHandle(&cached_property_name)) {
+              if (ComputePropertyAccessInfo(map, cached_property_name,
+                                            access_mode, access_info)) {
+                return true;
+              }
+            }
+          }
           *access_info = PropertyAccessInfo::AccessorConstant(
               MapList{receiver_map}, accessor, holder);
           return true;
         }
       }
       UNREACHABLE();
       return false;
     }
 
     // Don't search on the prototype chain for special indices in case of
@@ skipping 172 matching lines @@
   }
   return false;
 }
 
 
 Factory* AccessInfoFactory::factory() const { return isolate()->factory(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8