[PATCH] D26098: [SelectionDAG] Fix a crash visiting `AND` nodes

[escha via llvm-commits]

escha added a comment.

Might it be better to just bail if ShiftBits is zero? This seems like a classic case of "trying to optimize a node that itself is going to disappear when it gets combine()'d", so maybe we should just not do this "optimization" if the shift is no shift at all.


https://reviews.llvm.org/D26098