Load API accessor from descriptor instead of embedding it in handler.

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 113 matching lines @@
   PushInterceptorArguments(masm, receiver, holder, name, holder_obj);
   __ CallExternalReference(ExternalReference(IC_Utility(id), masm->isolate()),
                            NamedLoadHandlerCompiler::kInterceptorArgsLength);
 }
 
 
 // Generate call to api function.
 void PropertyHandlerCompiler::GenerateApiAccessorCall(
     MacroAssembler* masm, const CallOptimization& optimization,
     Handle<Map> receiver_map, Register receiver, Register scratch_in,
-    bool is_store, Register store_parameter) {
+    bool is_store, Register store_parameter, Register accessor_holder,
+    int accessor_index) {
+  DCHECK(!accessor_holder.is(scratch_in));
   DCHECK(optimization.is_simple_api_call());
 
   __ PopReturnAddressTo(scratch_in);
   // receiver
   __ Push(receiver);
   // Write the arguments to stack frame.
   if (is_store) {
     DCHECK(!receiver.is(store_parameter));
     DCHECK(!scratch_in.is(store_parameter));
     __ Push(store_parameter);
   }
   __ PushReturnAddressFrom(scratch_in);
   // Stack now matches JSFunction abi.
 
   // Abi for CallApiFunctionStub.
   Register callee = rdi;
   Register call_data = rbx;
   Register holder = rcx;
   Register api_function_address = rdx;
   Register scratch = rax;  // scratch_in is no longer valid.
 
+  // Put callee in place.
+  __ LoadAccessor(callee, accessor_holder, accessor_index,
+                  is_store ? ACCESSOR_SETTER : ACCESSOR_GETTER);
+
   // Put holder in place.
   CallOptimization::HolderLookup holder_lookup;
   Handle<JSObject> api_holder =
       optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup);
   switch (holder_lookup) {
     case CallOptimization::kHolderIsReceiver:
       __ Move(holder, receiver);
       break;
     case CallOptimization::kHolderFound:
       __ Move(holder, api_holder);
       break;
     case CallOptimization::kHolderNotFound:
       UNREACHABLE();
       break;
   }
 
   Isolate* isolate = masm->isolate();
-  Handle<JSFunction> function = optimization.constant_function();
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
   Handle<Object> call_data_obj(api_call_info->data(), isolate);
 
-  // Put callee in place.
-  __ Move(callee, function);
-
   bool call_data_undefined = false;
   // Put call_data in place.
   if (isolate->heap()->InNewSpace(*call_data_obj)) {
     __ Move(scratch, api_call_info);
     __ movp(call_data, FieldOperand(scratch, CallHandlerInfo::kDataOffset));
   } else if (call_data_obj->IsUndefined()) {
     call_data_undefined = true;
     __ LoadRoot(call_data, Heap::kUndefinedValueRootIndex);
   } else {
     __ Move(call_data, call_data_obj);
@@ skipping 553 matching lines @@
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, name);
 }
 
 
 #undef __
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64