[es6] re-implement rest parameters via desugaring

src/arm/full-codegen-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/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
@@ skipping 256 matching lines @@
            MemOperand(r2, ConstructFrameConstants::kOriginalConstructorOffset));
     __ b(&done);
 
     __ bind(&non_construct_frame);
     __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
     __ bind(&done);
 
     SetVar(new_target_var, r0, r2, r3);
   }
 
-  // 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(r3, fp, Operand(StandardFrameConstants::kCallerSPOffset + offset));
-    __ mov(r2, Operand(Smi::FromInt(num_parameters)));
-    __ mov(r1, Operand(Smi::FromInt(rest_index)));
-    __ mov(r0, Operand(Smi::FromInt(language_mode())));
-    __ Push(r3, r2, r1, r0);
-
-    RestParamAccessStub stub(isolate());
-    __ CallStub(&stub);
-
-    SetVar(rest_param, r0, r1, r2);
-  }
 
   Variable* arguments = scope()->arguments();
   if (arguments != NULL) {
     // Function uses arguments object.
     Comment cmnt(masm_, "[ Allocate arguments object");
     if (!function_in_register) {
       // Load this again, if it's used by the local context below.
       __ ldr(r3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
     } else {
       __ mov(r3, r1);
@@ skipping 5281 matching lines @@
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM