[Bug tree-optimization/97360] [11 Regression] ICE in range_on_exit

[bergner at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97360

--- Comment #24 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #22)
>        tree oi_uns_type = make_unsigned_type (256);
> -      vector_pair_type_node = build_distinct_type_copy (oi_uns_type);
>        SET_TYPE_MODE (vector_pair_type_node, POImode);

So this doesn't work.  Without that line vector_pair_type_node is
NULL and the SET_TYPE_MODE() usage on the next line ends up dereferencing it
and we SEGV.