Remove (H|L)JSArrayLength instructions

src/arm/lithium-codegen-arm.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 1900 matching lines @@
   Handle<Object> value = instr->value();
   if (value->IsSmi()) {
     __ mov(ToRegister(instr->result()), Operand(value));
   } else {
     __ LoadHeapObject(ToRegister(instr->result()),
                       Handle<HeapObject>::cast(value));
   }
 }
 
 
-void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
-  Register result = ToRegister(instr->result());
-  Register array = ToRegister(instr->value());
-  __ ldr(result, FieldMemOperand(array, JSArray::kLengthOffset));
-}
-
-
 void LCodeGen::DoFixedArrayBaseLength(LFixedArrayBaseLength* instr) {
   Register result = ToRegister(instr->result());
   Register array = ToRegister(instr->value());
   __ ldr(result, FieldMemOperand(array, FixedArrayBase::kLengthOffset));
 }
 
 
 void LCodeGen::DoMapEnumLength(LMapEnumLength* instr) {
   Register result = ToRegister(instr->result());
   Register map = ToRegister(instr->value());
@@ skipping 4455 matching lines @@
   __ sub(scratch, result, Operand(index, LSL, kPointerSizeLog2 - kSmiTagSize));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal