Use register arguments for RestParamAccessStub

src/full-codegen/x64/full-codegen-x64.cc

 // Copyright 2012 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/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 240 matching lines @@
 
   // Possibly allocate RestParameters
   int rest_index;
   Variable* rest_param = scope()->rest_parameter(&rest_index);
   if (rest_param) {
     Comment cmnt(masm_, "[ Allocate rest parameter array");
 
     int num_parameters = info->scope()->num_parameters();
     int offset = num_parameters * kPointerSize;
 
-    __ leap(rdx,
+    __ Move(RestParamAccessDescriptor::parameter_count(),
+            Smi::FromInt(num_parameters));
+    __ leap(RestParamAccessDescriptor::parameter_pointer(),
             Operand(rbp, StandardFrameConstants::kCallerSPOffset + offset));
-    __ Push(rdx);
-    __ Push(Smi::FromInt(num_parameters));
-    __ Push(Smi::FromInt(rest_index));
-    __ Push(Smi::FromInt(language_mode()));
+    __ Move(RestParamAccessDescriptor::rest_parameter_index(),
+            Smi::FromInt(rest_index));
+    __ Move(RestParamAccessDescriptor::language_mode(),
+            Smi::FromInt(language_mode()));
     function_in_register = false;
 
     RestParamAccessStub stub(isolate());
     __ CallStub(&stub);
 
     SetVar(rest_param, rax, rbx, rdx);
   }
 
   // Possibly allocate an arguments object.
   Variable* arguments = scope()->arguments();
@@ skipping 4515 matching lines @@
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64