VM_Interface._assert(bufferOffset(tail).sGE(VM_Offset.fromInt(BYTES_IN_ADDRESS)));
VM_Interface._assert(bufferOffset(tail).sGE(VM_Offset.fromIntZeroExtend(BYTES_IN_ADDRESS)));
  protected final void uncheckedInsert(VM_Address value) throws VM_PragmaInline {    if (VM_Interface.VerifyAssertions)       VM_Interface._assert(bufferOffset(tail).sGE(VM_Offset.fromInt(BYTES_IN_ADDRESS)));    tail = tail.sub(BYTES_IN_ADDRESS);    VM_Magic.setMemoryAddress(tail, value);    //    if (VM_Interface.VerifyAssertions) enqueued++;  }