[Bug tree-optimization/56695] [4.9 Regression] ICE in expand_vec_cond_expr, at optabs.c:6751

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56695

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-27 09:53:59 UTC ---
(In reply to comment #2)
> In tree-vect-stmts.c:
> 
>   if (!INTEGRAL_TYPE_P (TREE_TYPE (vectype)))
>     {
>       unsigned int prec = GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (vectype)));
>       tree cmp_type = build_nonstandard_integer_type (prec, 1);
>       vec_cmp_type = get_same_sized_vectype (cmp_type, vectype);
>       if (vec_cmp_type == NULL_TREE)
>         return false;
>     }
> 
> It doesn't check if vectype is signed, and anyway it explicitly asks for an
> unsigned type. Changing those 2 things seems to help. I am away next week,
> can't try a patch now.

vectype is the vector type of the COND_EXPR result - it should obviously
use the signedness of the scalar condition operands.