int value = VM_Magic.getMemoryInt(block.add(FREE_LIST_OFFSET)); return value >> INUSE_SHIFT;
VM_Word value = VM_Magic.getMemoryWord(block.add(FREE_LIST_OFFSET)).rshl(INUSE_SHIFT); return value.toInt();
  protected static final int getInUse(VM_Address block)     throws VM_PragmaInline {    int value = VM_Magic.getMemoryInt(block.add(FREE_LIST_OFFSET));    return value >> INUSE_SHIFT;  }