A64: Ensure String::kContainsCachedArrayIndexMask is a uint32 constant.

src/objects.h

 // 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 7669 matching lines @@
   static const int kArrayIndexHashMask = (1 << kArrayIndexHashLengthShift) - 1;
 
   static const int kArrayIndexValueMask =
       ((1 << kArrayIndexValueBits) - 1) << kHashShift;
 
   // Check that kMaxCachedArrayIndexLength + 1 is a power of two so we
   // could use a mask to test if the length of string is less than or equal to
   // kMaxCachedArrayIndexLength.
   STATIC_CHECK(IS_POWER_OF_TWO(kMaxCachedArrayIndexLength + 1));
 
-  static const int kContainsCachedArrayIndexMask =
+  static const unsigned int kContainsCachedArrayIndexMask =
       (~kMaxCachedArrayIndexLength << kArrayIndexHashLengthShift) |
       kIsNotArrayIndexMask;
 
   // Value of empty hash field indicating that the hash is not computed.
   static const int kEmptyHashField =
       kIsNotArrayIndexMask | kHashNotComputedMask;
 
  protected:
   static inline bool IsHashFieldComputed(uint32_t field);
 
@@ skipping 2046 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_