请教DC问题

Design Compile时，出下面的Warning，好像没有什么问题，不过不理解是什么意思，请那位指教一下，谢谢。
Warning: A non-unate path in clock network for clock 'cgdrCLK100'

好像没有，只有MUX和AND。那个Warning的意思是什么意思？一般哪些情况下会有这个Warning?

non-unate指类似XOR这种逻辑
DC没法propagat clock
对于MUX什么的set_case_analyse

... DC当然可以propagate clock through non-unate arcs

anyway, By default, Design Compiler propagates both positive unate clock paths and negative unate clock paths through the non-unate clock network,
which resluts half-cycle setup paths