Add new ARM macro assembler function CompareRoot left out of previous commit.

src/arm/macro-assembler-arm.h

 // Copyright 2010 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 559 matching lines @@
                 Label* fail,
                 bool is_heap_object);
 
   void CheckMap(Register obj,
                 Register scratch,
                 Heap::RootListIndex index,
                 Label* fail,
                 bool is_heap_object);
 
 
+  // Compare the object in a register to a value from the root list.
+  // Uses the ip register as scratch.
+  void CompareRoot(Register obj, Heap::RootListIndex index);
+
+
   // Load and check the instance type of an object for being a string.
   // Loads the type into the second argument register.
   // Returns a condition that will be enabled if the object was a string.
   Condition IsObjectStringType(Register obj,
                                Register type) {
     ldr(type, FieldMemOperand(obj, HeapObject::kMapOffset));
     ldrb(type, FieldMemOperand(type, Map::kInstanceTypeOffset));
     tst(type, Operand(kIsNotStringMask));
     ASSERT_EQ(0, kStringTag);
     return eq;
@@ skipping 416 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_