bitmapWord = block.add(INUSE_BITMAP_BASE + offset); word = VM_Magic.getMemoryWord(bitmapWord);
VM_Address bitmapWord = block.add(INUSE_BITMAP_BASE + offset); VM_Word word = VM_Magic.getMemoryWord(bitmapWord);
  protected final void postAlloc(VM_Address cell, VM_Address block,				 int sizeClass, EXTENT bytes)     throws VM_PragmaInline {    // establish bitmask & offset for this cell in the block    //    int index = (cell.diff(block).toInt())/cellSize[sizeClass];    int index = (cell.diff(block.add(blockHeaderSize[sizeClass])).toInt())/cellSize[sizeClass];    int bitnumber = index & (WORD_BITS - 1);    VM_Word mask = VM_Word.fromInt(1<<bitnumber);    int offset = (index>>LOG_WORD_BITS)<<(LOG_WORD_SIZE + 1);    VM_Address bitmapWord;    VM_Word word;    if (VM.VerifyAssertions)      VM._assert((INUSE_BITMAP_BASE + offset) < blockHeaderSize[sizeClass]);    // set the inuse bit    bitmapWord = block.add(INUSE_BITMAP_BASE + offset);    word = VM_Magic.getMemoryWord(bitmapWord);    word = word.or(mask);    VM_Magic.setMemoryWord(bitmapWord, word);    if (msSpace.inMSCollection) {      // set the mark bit      bitmapWord = block.add(MARK_BITMAP_BASE + offset);      word = VM_Magic.getMemoryWord(bitmapWord);      word = word.or(mask);      VM_Magic.setMemoryWord(bitmapWord, word);    }  };  