Sei Lisa 493aed6c39 Optimize (-a)*b or a*(-b) to -(a*b), revisiting the expression. ...

This obviates the need for (-a)*(-b) because it will be simplified automatically. It also enables (a+1)*b-1 to be simplified to just ~(~a*b). Still missing simplifying a*b+b to (a+1)*b, but that's more complicated.

2015-03-03 01:46:53 +01:00

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