[Bug c++/64704] software crashed when using vectorizing optimization

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64704

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely because icmp6Ptr is not aligned to 16 bits like you say it is by
doing:
   register uint16 *ptr = (uint16 *)icmp6Ptr;