[es6] Introduce spec compliant IsConstructor.

src/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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast-numbering.h"
@@ skipping 6400 matching lines @@
   InstanceType instance_type = map_->instance_type();
   return instance_type == JS_TYPED_ARRAY_TYPE && name_->IsString() &&
          IsSpecialIndex(isolate()->unicode_cache(), String::cast(*name_));
 }
 
 
 bool HOptimizedGraphBuilder::PropertyAccessInfo::CanAccessMonomorphic() {
   if (!CanInlinePropertyAccess(map_)) return false;
   if (IsJSObjectFieldAccessor()) return IsLoad();
   if (IsJSArrayBufferViewFieldAccessor()) return IsLoad();
-  if (map_->function_with_prototype() && !map_->has_non_instance_prototype() &&
+  if (map_->IsJSFunctionMap() && map_->is_constructor() &&
+      !map_->has_non_instance_prototype() &&
       name_.is_identical_to(isolate()->factory()->prototype_string())) {
     return IsLoad();
   }
   if (!LookupDescriptor()) return false;
   if (IsFound()) return IsLoad() || !IsReadOnly();
   if (IsIntegerIndexedExotic()) return false;
   if (!LookupInPrototypes()) return false;
   if (IsLoad()) return true;
 
   if (IsAccessorConstant()) return true;
@@ skipping 93 matching lines @@
     return New<HLoadNamedField>(object, checked_object, access);
   }
 
   if (info->GetJSArrayBufferViewFieldAccess(&access)) {
     DCHECK(info->IsLoad());
     checked_object = Add<HCheckArrayBufferNotNeutered>(checked_object);
     return New<HLoadNamedField>(object, checked_object, access);
   }
 
   if (info->name().is_identical_to(isolate()->factory()->prototype_string()) &&
-      info->map()->function_with_prototype()) {
+      info->map()->IsJSFunctionMap() && info->map()->is_constructor()) {
     DCHECK(!info->map()->has_non_instance_prototype());
     return New<HLoadFunctionPrototype>(checked_object);
   }
 
   HValue* checked_holder = checked_object;
   if (info->has_holder()) {
     Handle<JSObject> prototype(JSObject::cast(info->map()->prototype()));
     checked_holder = BuildCheckPrototypeMaps(prototype, info->holder());
   }
 
@@ skipping 7051 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8