protected final VM_Address allocSlowOnce (boolean isScalar, EXTENT bytes) throws VM_PragmaInline {
public final VM_Address allocSlowOnce (boolean isScalar, int bytes) throws VM_PragmaNoInline {   VM_Address cell = allocFast(isScalar, bytes); if (!cell.isZero()) return cell;
  protected final VM_Address allocSlowOnce (boolean isScalar, EXTENT bytes)    throws VM_PragmaInline {    int sizeClass = getSizeClass(bytes);    VM_Address cell = expandSizeClass(sizeClass);    if (cell.isZero())      return VM_Address.zero();    cellsInUse[sizeClass]++;    freeList.set(sizeClass, getNextCell(cell));    postAlloc(cell, currentBlock.get(sizeClass), sizeClass,	      bytes);    Memory.zeroSmall(cell, bytes);    return cell;  }