--- Comment #11 from Jakub Jelinek <jakub at gcc dot> ---
(In reply to from comment #10)
> I'd tried doing this in set_nonzero_bits first, before adding
> intersect_range_with_nonzero_bits.  See
> for why it didn't
> work.

IMHO that is a risk of all the VRP changes that some case will regress, the
more important question is how much it will help in general, and I think it
If it is only done in this special case, other passes can't benefit from the
more accurate range info.
That said, such a change is likely inappropriate for stage4 at this point.

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