> Since r230164, in PR68330 combine ends up with a sign_extend of an
> lshiftrt by some constant, and it does not know to morph that into a
> zero_extract (the extend will always extend with zeroes). I think
> it is best to let simplify-rtx always replace such a sign_extend by
> a zero_extend, aft
Since r230164, in PR68330 combine ends up with a sign_extend of an
lshiftrt by some constant, and it does not know to morph that into a
zero_extract (the extend will always extend with zeroes). I think
it is best to let simplify-rtx always replace such a sign_extend by
a zero_extend, after which e