Optimized nodeType dom binding by removing HandleScope and the preparation of ordinary c function c…

src/ic/x64/handler-compiler-x64.cc

Index: src/ic/x64/handler-compiler-x64.cc
diff --git a/src/ic/x64/handler-compiler-x64.cc b/src/ic/x64/handler-compiler-x64.cc
index a782b088edda0d7e4c222256674749e9951c6b69..ead4067313a5bb8aac43d9d61b9c255ed4ec5fc2 100644
--- a/src/ic/x64/handler-compiler-x64.cc
+++ b/src/ic/x64/handler-compiler-x64.cc
@@ -508,6 +508,8 @@ void NamedLoadHandlerCompiler::GenerateLoadCallback(
   STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 4);
   STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 5);
   STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 6);
+
+  bool fast_call = callback->can_fast_call();
   __ Push(receiver());  // receiver
   if (heap()->InNewSpace(callback->data())) {
     DCHECK(!scratch2().is(reg));
@@ -523,6 +525,11 @@ void NamedLoadHandlerCompiler::GenerateLoadCallback(
   __ Push(kScratchRegister);  // return value default
   __ PushAddress(ExternalReference::isolate_address(isolate()));
   __ Push(reg);     // holder
+  if (fast_call) {
+     // the address of PropertyCallbackInfo
+     __ leap(kScratchRegister, Operand(rsp, 0));
+     __ Push(kScratchRegister);
+  }
   __ Push(name());  // name
   // Save a pointer to where we pushed the arguments pointer.  This will be
   // passed as the const PropertyAccessorInfo& to the C++ callback.
@@ -533,6 +540,11 @@ void NamedLoadHandlerCompiler::GenerateLoadCallback(
   Register api_function_address = ApiGetterDescriptor::function_address();
   Address getter_address = v8::ToCData<Address>(callback->getter());
   __ Move(api_function_address, getter_address, RelocInfo::EXTERNAL_REFERENCE);
+  if (fast_call) {
+     CallFastApiGetterStub stub(isolate());
+     __ TailCallStub(&stub);
+     return;
+  }
 
   CallApiGetterStub stub(isolate());
   __ TailCallStub(&stub);