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

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

 // Copyright 2014 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/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 490 matching lines @@
   DCHECK(!scratch4().is(reg));
   __ PopReturnAddressTo(scratch4());
 
   STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 0);
   STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 1);
   STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 3);
   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));
     __ Move(scratch2(), callback);
     __ Push(FieldOperand(scratch2(),
                          ExecutableAccessorInfo::kDataOffset));  // data
   } else {
     __ Push(Handle<Object>(callback->data(), isolate()));
   }
   DCHECK(!kScratchRegister.is(reg));
   __ LoadRoot(kScratchRegister, Heap::kUndefinedValueRootIndex);
   __ Push(kScratchRegister);  // return value
   __ 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.
 
   __ PushReturnAddressFrom(scratch4());
 
   // Abi for CallApiGetter
   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);
 }
 
 
 void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) {
   // Return the constant value.
   __ Move(rax, value);
   __ ret(0);
@@ skipping 150 matching lines @@
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, name);
 }
 
 
 #undef __
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64