[Bug target/79240] [7 Regression] ICE in s390_extzv_shift_ok, at config/s390/s390.c:2475

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79240

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, either this is a bug in s390_extzv_shift_ok that is should use
s390_contiguous_bitmask_p (contig, true, bitsize, &start, &end);
instead of
s390_contiguous_bitmask_nowrap_p (contig, bitsize, &start, &end);
and deal with the start > end case somehow.
Or the 4 patterns that use s390_extzv_shift_ok should use
contiguous_bitmask_nowrap_operand instead of contiguous_bitmask_operand.