Use register arguments for RestParamAccessStub

src/runtime/runtime-scopes.cc

Index: src/runtime/runtime-scopes.cc
diff --git a/src/runtime/runtime-scopes.cc b/src/runtime/runtime-scopes.cc
index 77dc3cb5079d89d7a62baac2889d92f698d7130c..a56ca21da4ca85a6d9a8f5dca3e1ec74da7977c0 100644
--- a/src/runtime/runtime-scopes.cc
+++ b/src/runtime/runtime-scopes.cc
@@ -659,8 +659,8 @@ static Handle<JSArray> NewRestParam(Isolate* isolate, Object** parameters,
 RUNTIME_FUNCTION(Runtime_NewRestParam) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 4);
-  Object** parameters = reinterpret_cast<Object**>(args[0]);
-  CONVERT_SMI_ARG_CHECKED(num_params, 1);
+  CONVERT_SMI_ARG_CHECKED(num_params, 0);
+  Object** parameters = reinterpret_cast<Object**>(args[1]);
   CONVERT_SMI_ARG_CHECKED(rest_index, 2);
   CONVERT_SMI_ARG_CHECKED(language_mode, 3);