https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111793
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, shouldn't we match.pd (or something else) pattern match
vect_cst__50 = {mask.48_7(D), mask.48_7(D), mask.48_7(D), mask.48_7(D),
mask.48_7(D), mask.48_7(D), mask.48_7(D), mask.48_7(D), mask.48_7(D),
mask.48_7(D), mask.48_7(D), mask.48_7(D), mask.48_7(D), mask.48_7(D),
mask.48_7(D), mask.48_7(D)};
vect__8.132_51 = vect_cst__50 >> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15 };
vect__9.133_53 = vect__8.132_51 & { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1 };
mask__39.139_60 = vect__9.133_53 != { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0 };
back into mask__39.139_60 = mask.48_7(D); ?
