[Bug middle-end/57286] [4.9 regression] infinite recurison in fold-const.c:10037

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57286

--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Shorter testcase:

typedef long vec __attribute__((vector_size(16)));
vec f(vec x){
  return (x<0)|1;
}