Do not eagerly instantiate accessors' JSFunction.

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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/isolate-inl.h"
@@ skipping 163 matching lines @@
   }
 
   Isolate* isolate = masm->isolate();
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
   bool call_data_undefined = false;
   // Put call data in place.
   if (api_call_info->data()->IsUndefined()) {
     call_data_undefined = true;
     __ LoadRoot(data, Heap::kUndefinedValueRootIndex);
   } else {
-    __ movp(data, FieldOperand(callee, JSFunction::kSharedFunctionInfoOffset));
-    __ movp(data, FieldOperand(data, SharedFunctionInfo::kFunctionDataOffset));
-    __ movp(data, FieldOperand(data, FunctionTemplateInfo::kCallCodeOffset));
+    if (optimization.is_constant_call()) {
+      __ movp(data,
+              FieldOperand(callee, JSFunction::kSharedFunctionInfoOffset));
+      __ movp(data,
+              FieldOperand(data, SharedFunctionInfo::kFunctionDataOffset));
+      __ movp(data, FieldOperand(data, FunctionTemplateInfo::kCallCodeOffset));
+    } else {
+      __ movp(data,
+              FieldOperand(callee, FunctionTemplateInfo::kCallCodeOffset));
+    }
     __ movp(data, FieldOperand(data, CallHandlerInfo::kDataOffset));
   }
 
   if (api_call_info->fast_handler()->IsCode()) {
     // Just tail call into the fast handler if present.
     __ Jump(handle(Code::cast(api_call_info->fast_handler())),
             RelocInfo::CODE_TARGET);
     return;
   }
 
   // Put api_function_address in place.
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
   __ Move(api_function_address, function_address,
           RelocInfo::EXTERNAL_REFERENCE);
 
   // Jump to stub.
-  CallApiAccessorStub stub(isolate, is_store, call_data_undefined);
+  CallApiAccessorStub stub(isolate, is_store, call_data_undefined,
+                           !optimization.is_constant_call());
   __ TailCallStub(&stub);
 }
 
 
 void PropertyHandlerCompiler::GenerateCheckPropertyCell(
     MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name,
     Register scratch, Label* miss) {
   Handle<PropertyCell> cell = JSGlobalObject::EnsurePropertyCell(global, name);
   DCHECK(cell->value()->IsTheHole());
   Factory* factory = masm->isolate()->factory();
@@ skipping 586 matching lines @@
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, name);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64