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* Reimplement opt_share to work on $alu and $pmuxBogdan Vukobratovic2019-07-281-8/+11
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* Implement opt_shareBogdan Vukobratovic2019-07-261-0/+10
This pass identifies arithmetic operators that share an operand and whose results are used in mutually exclusive cases controlled by a multiplexer, and merges them together by multiplexing the other operands