With >= 64 non-string instance types, I removed an optimization

src/arm/ic-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 307 matching lines @@
 
   // Is the string an array index, with cached numeric value?
   __ ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset));
   __ tst(hash, Operand(Name::kContainsCachedArrayIndexMask));
   __ b(eq, index_string);
 
   // Is the string internalized? We know it's a string, so a single
   // bit test is enough.
   // map: key map
   __ ldrb(hash, FieldMemOperand(map, Map::kInstanceTypeOffset));
-  STATIC_ASSERT(kInternalizedTag != 0);
-  __ tst(hash, Operand(kIsInternalizedMask));
-  __ b(eq, not_unique);
+  STATIC_ASSERT(kInternalizedTag == 0);
+  __ tst(hash, Operand(kIsNotInternalizedMask));
+  __ b(ne, not_unique);
 
   __ bind(&unique);
 }
 
 
 // Defined in ic.cc.
 Object* CallIC_Miss(Arguments args);
 
 // The generated code does not accept smi keys.
 // The generated code falls through if both probes miss.
@@ skipping 1357 matching lines @@
   } else {
     ASSERT(Assembler::GetCondition(branch_instr) == ne);
     patcher.EmitCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM