[runtime] Optimize and unify rest parameters.

src/arm/interface-descriptors-arm.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.
 
 #include "src/arm/interface-descriptors-arm.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/interface-descriptors.h"
 
@@ skipping 47 matching lines @@
 
 const Register ArgumentsAccessReadDescriptor::index() { return r1; }
 const Register ArgumentsAccessReadDescriptor::parameter_count() { return r0; }
 
 
 const Register ArgumentsAccessNewDescriptor::function() { return r1; }
 const Register ArgumentsAccessNewDescriptor::parameter_count() { return r2; }
 const Register ArgumentsAccessNewDescriptor::parameter_pointer() { return r3; }
 
 
-const Register RestParamAccessDescriptor::parameter_count() { return r2; }
-const Register RestParamAccessDescriptor::parameter_pointer() { return r3; }
-const Register RestParamAccessDescriptor::rest_parameter_index() { return r4; }
-
-
 const Register ApiGetterDescriptor::function_address() { return r2; }
 
 
 const Register MathPowTaggedDescriptor::exponent() { return r2; }
 
 
 const Register MathPowIntegerDescriptor::exponent() {
   return MathPowTaggedDescriptor::exponent();
 }
 
 
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return r0; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return r3; }
 
 
 void FastNewClosureDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r2};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 void FastNewContextDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r1};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
+void FastNewRestParameterDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {r1};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void ToNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r0};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 
 // static
 const Register ToLengthDescriptor::ReceiverRegister() { return r0; }
 
@@ skipping 348 matching lines @@
       r2,  // address of first argument (argv)
       r1   // the runtime function to call
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM