Cache IC handlers on the prototype's map if possible

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 <algorithm>
 
 #include "src/v8.h"
 
@@ skipping 6106 matching lines @@
   for (int i = 1; i < types->length(); ++i) {
     PropertyAccessInfo test_info(
         builder_, access_type_, ToType(types->at(i)), name_);
     if (!test_info.IsCompatible(this)) return false;
   }
 
   return true;
 }
 
 
+Handle<Map> HOptimizedGraphBuilder::PropertyAccessInfo::map() {
+  JSFunction* ctor = IC::GetRootConstructor(
+      type_, current_info()->closure()->context()->native_context());
+  if (ctor != NULL) return handle(ctor->initial_map());
+  return type_->AsClass()->Map();
+}
+
+
 static bool NeedsWrappingFor(Type* type, Handle<JSFunction> target) {
   return type->Is(Type::NumberOrString()) &&
       target->shared()->strict_mode() == SLOPPY &&
       !target->shared()->native();
 }
 
 
 HInstruction* HOptimizedGraphBuilder::BuildMonomorphicAccess(
     PropertyAccessInfo* info,
     HValue* object,
@@ skipping 6293 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal