Version 3.10.3

src/x64/lithium-codegen-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4262 matching lines @@
       Handle<FixedDoubleArray> double_array =
           Handle<FixedDoubleArray>::cast(elements);
       for (int i = 0; i < elements_length; i++) {
         int64_t value = double_array->get_representation(i);
         int total_offset =
             elements_offset + FixedDoubleArray::OffsetOfElementAt(i);
         __ movq(rcx, value, RelocInfo::NONE);
         __ movq(FieldOperand(result, total_offset), rcx);
       }
     } else if (elements->IsFixedArray()) {
+      Handle<FixedArray> fast_elements = Handle<FixedArray>::cast(elements);
       for (int i = 0; i < elements_length; i++) {
         int total_offset = elements_offset + FixedArray::OffsetOfElementAt(i);
-        Handle<Object> value = JSObject::GetElement(object, i);
+        Handle<Object> value(fast_elements->get(i));
         if (value->IsJSObject()) {
           Handle<JSObject> value_object = Handle<JSObject>::cast(value);
           __ lea(rcx, Operand(result, *offset));
           __ movq(FieldOperand(result, total_offset), rcx);
           __ LoadHeapObject(source, value_object);
           EmitDeepCopy(value_object, result, source, offset);
         } else if (value->IsHeapObject()) {
           __ LoadHeapObject(rcx, Handle<HeapObject>::cast(value));
           __ movq(FieldOperand(result, total_offset), rcx);
         } else {
@@ skipping 488 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64