Extent bytes = Extent.fromInt(EmbeddedMetaData.BYTES_IN_REGION>>LOG_LIVE_COVERAGE);
Extent bytes = Extent.fromIntSignExtend(EmbeddedMetaData.BYTES_IN_REGION>>LOG_LIVE_COVERAGE);
  public static final void zeroLiveBits(Address start, Address end) {    Extent bytes = Extent.fromInt(EmbeddedMetaData.BYTES_IN_REGION>>LOG_LIVE_COVERAGE);    while (start.LT(end)) {      Address metadata = EmbeddedMetaData.getMetaDataBase(start).add(SegregatedFreeList.META_DATA_OFFSET);      Memory.zero(metadata, bytes);      start = start.add(EmbeddedMetaData.BYTES_IN_REGION);    }  }