Sei Lisa 3a849fe4b9 Optimize a common condition of (x & flag1) && (x & flag2) ...

It can't be done always: flag1 and flag2 must be nonzero powers of two. In that case, we can transform it to:

!~(x|~(flag1|flag2)) = !~(x|constant)

The -2147483648 case has trouble with the sign hack detector and I couldn't trigger it.

2017-10-13 02:59:32 +02:00

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