[Bug middle-end/78684] [7 Regression] ICE in create_intersect_range_checks_index, at tree-vect-loop-manip.c:2074

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78684

--- Comment #4 from amker at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #3)
> neg_step is true, because DR_STEP (dr_a.dr) is (ssizetype) -8.
> But idx_step is 0xffffffffffffffffUL.
> Note
> tree_int_cst_compare (idx_step, size_zero_node) < 0
> is just weird, why don't you use tree_int_cst_sgn?

Hi Jakub, do you mean tree_int_cst_sign_bit?  Thanks.