Method optimize

sql/sp_head.cc:3323–3363

*/

void sp_head::optimize()
{
  List<sp_instr_opt_meta> bp;
  sp_instr *i;
  uint src, dst;

  DBUG_EXECUTE_IF("sp_head_optimize_disable", return; );

  opt_mark();

  bp.empty();
  src= dst= 0;
  while ((i= get_instr(src)))
  {
    if (! i->marked)
    {
      delete i;
      src+= 1;
    }
    else
    {
      if (src != dst)
      {
        /* Move the instruction and update prev. jumps */
        sp_instr_opt_meta *ibp;
        List_iterator_fast<sp_instr_opt_meta> li(bp);

        set_dynamic(&m_instr, (uchar*)&i, dst);
        while ((ibp= li++))
        {
          ibp->set_destination(src, dst);
        }
      }
      i->opt_move(dst, &bp);
      src+= 1;
      dst+= 1;
    }
  }
  m_instr.elements= dst;
  bp.empty();
}

void sp_head::add_mark_lead(uint ip, List<sp_instr> *leads)
{