[es6] Re-implement rest parameters via desugaring.

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index 5a2834d9b4d17110e8118fb35dbf4c59aea46e1e..1e01b0d77e12c9b5fc72fdce614246cca3cc3ef5 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -285,28 +285,6 @@ void FullCodeGenerator::Generate() {
     SetVar(new_target_var, x0, x2, x3);
   }
 
-  // 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;
-
-    __ Add(x3, fp, StandardFrameConstants::kCallerSPOffset + offset);
-    __ Mov(x2, Smi::FromInt(num_parameters));
-    __ Mov(x1, Smi::FromInt(rest_index));
-    __ Mov(x0, Smi::FromInt(language_mode()));
-    __ Push(x3, x2, x1, x0);
-    function_in_register_x1 = false;
-
-    RestParamAccessStub stub(isolate());
-    __ CallStub(&stub);
-
-    SetVar(rest_param, x0, x1, x2);
-  }
-
   Variable* arguments = scope()->arguments();
   if (arguments != NULL) {
     // Function uses arguments object.