[Bug tree-optimization/107985] [13 Regression] ICE in as_a, at value-range.h:393

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107985

--- Comment #3 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Another alternative would be to add an is_a/as_a handler for unsupported_type's
in value-range.h and a corresponding entry for unsupported types in
range_operator:

virtual bool fold_range (irange &r, tree type, const unsupported_range &lh,
...);

with a default definition of:

   r.set_varying (type);
   return true;

Finally, add the corresponding dispatch in range_op_handler::fold_range().

Then we could handle any unsupported range's that creep in.

Or...we could fix the range_op_handler code...