ICC中data_setup阶段set physopt_power_critical_range

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set physopt_power_critical_range 一般设为多少比较好，下面是他的描述The  power  critical range specifies a margin of slack for cells during
       leakage power optimization.  If a cell has a slack less than the  power
       critical  range,  leakage  power  optimization will not be done for the
       cell.  The default value is minus infinity; that is, all cells will  be
       optimized for leakage power during the leakage power optimization phase
       of the physopt command.