Do not eagerly instantiate accessors' JSFunction.

src/arm64/code-stubs-arm64.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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 5691 matching lines @@
   // Save the return value in a callee-save register.
   Register saved_result = x19;
   __ Mov(saved_result, x0);
   __ Mov(x0, ExternalReference::isolate_address(isolate));
   __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate),
                    1);
   __ Mov(x0, saved_result);
   __ B(&leave_exit_frame);
 }
 
-
 static void CallApiFunctionStubHelper(MacroAssembler* masm,
                                       const ParameterCount& argc,
                                       bool return_first_arg,
-                                      bool call_data_undefined) {
+                                      bool call_data_undefined, bool is_lazy) {
   // ----------- S t a t e -------------
   //  -- x0                  : callee
   //  -- x4                  : call_data
   //  -- x2                  : holder
   //  -- x1                  : api_function_address
   //  -- x3                  : number of arguments if argc is a register
   //  -- cp                  : context
   //  --
   //  -- sp[0]               : last argument
   //  -- ...
@@ skipping 16 matching lines @@
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
   STATIC_ASSERT(FCA::kArgsLength == 7);
 
   DCHECK(argc.is_immediate() || x3.is(argc.reg()));
 
   // FunctionCallbackArguments: context, callee and call data.
   __ Push(context, callee, call_data);
 
-  // Load context from callee
-  __ Ldr(context, FieldMemOperand(callee, JSFunction::kContextOffset));
+  if (!is_lazy) {
+    // Load context from callee
+    __ Ldr(context, FieldMemOperand(callee, JSFunction::kContextOffset));
+  }
 
   if (!call_data_undefined) {
     __ LoadRoot(call_data, Heap::kUndefinedValueRootIndex);
   }
   Register isolate_reg = x5;
   __ Mov(isolate_reg, ExternalReference::isolate_address(masm->isolate()));
 
   // FunctionCallbackArguments:
   //    return value, return value default, isolate, holder.
   __ Push(call_data, call_data, isolate_reg, holder);
@@ skipping 64 matching lines @@
   const int spill_offset = 1 + kApiStackSpace;
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space,
                            stack_space_operand, spill_offset,
                            return_value_operand, &context_restore_operand);
 }
 
 
 void CallApiFunctionStub::Generate(MacroAssembler* masm) {
   bool call_data_undefined = this->call_data_undefined();
   CallApiFunctionStubHelper(masm, ParameterCount(x3), false,
-                            call_data_undefined);
+                            call_data_undefined, false);
 }
 
 
 void CallApiAccessorStub::Generate(MacroAssembler* masm) {
   bool is_store = this->is_store();
   int argc = this->argc();
   bool call_data_undefined = this->call_data_undefined();
+  bool is_lazy = this->is_lazy();
   CallApiFunctionStubHelper(masm, ParameterCount(argc), is_store,
-                            call_data_undefined);
+                            call_data_undefined, is_lazy);
 }
 
 
 void CallApiGetterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- sp[0]                         : name
   //  -- sp[8 .. (8 + kArgsLength*8)]  : v8::PropertyCallbackInfo::args_
   //  -- ...
   //  -- x2                            : api_function_address
   // -----------------------------------
@@ skipping 35 matching lines @@
                            return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64