V8 support for cached accessors.

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 <memory>
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
@@ skipping 5387 matching lines @@
             return Bailout(kReferenceToUninitializedVariable);
           }
           HInstruction* result = New<HLoadNamedField>(
               Add<HConstant>(script_context), nullptr,
               HObjectAccess::ForContextSlot(lookup.slot_index));
           return ast_context()->ReturnInstruction(result, expr->id());
         }
       }
 
       LookupIterator it(global, variable->name(), LookupIterator::OWN);
+      it.TryLookupCacheProperty();
       if (CanInlineGlobalPropertyAccess(variable, &it, LOAD)) {
         InlineGlobalPropertyLoad(&it, expr->id());
         return;
       } else {
         Handle<TypeFeedbackVector> vector(current_feedback_vector(), isolate());
 
         HValue* vector_value = Add<HConstant>(vector);
         HValue* slot_value =
             Add<HConstant>(vector->GetIndex(expr->VariableFeedbackSlot()));
         Callable callable = CodeFactory::LoadGlobalICInOptimizedCode(
@@ skipping 791 matching lines @@
       return BuildStoreNamedField(info, checked_object, value);
     }
   }
 
   if (info->IsTransition()) {
     DCHECK(!info->IsLoad());
     return BuildStoreNamedField(info, checked_object, value);
   }
 
   if (info->IsAccessorConstant()) {
+    MaybeHandle<Name> maybe_name =
+        FunctionTemplateInfo::TryGetCachePropertyName(isolate(),
+                                                      info->accessor());
+    if (!maybe_name.is_null()) {
+      Handle<Name> name = maybe_name.ToHandleChecked();
+      PropertyAccessInfo cache_info(this, LOAD, info->map(), name);
+      // Load new target.
+      if (cache_info.CanAccessMonomorphic())
+        return BuildLoadNamedField(&cache_info, checked_object);
+    }
+
     Push(checked_object);
     int argument_count = 1;
     if (!info->IsLoad()) {
       argument_count = 2;
       Push(value);
     }
 
     if (info->accessor()->IsJSFunction() &&
         info->NeedsWrappingFor(Handle<JSFunction>::cast(info->accessor()))) {
       HValue* function = Add<HConstant>(info->accessor());
@@ skipping 6915 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8