[Bug tree-optimization/102046] [12 Regression] ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p, at gimple-expr.c:87 with -O3 -march=btver2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102046

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
              else if (!useless_type_conversion_p (elt_t, TREE_TYPE (elt_v)))
                {
                  error ("incorrect type of vector CONSTRUCTOR elements");
                  debug_generic_stmt (rhs1);
                  return true;
                }

  _16 = {_2, _12};

Maybe introduced by r12-1294.