[Bug tree-optimization/105532] [11/12/13 Regression] UBSAN: gcc/hwint.h:293:61: runtime error: shift exponent 64 is too large for 64-bit type 'long unsigned int'

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105532

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> Confirmed.
> The bug is either in tree_nonzero_bits and should not be doing:
>   return wi::shwi (-1, TYPE_PRECISION (TREE_TYPE (t)));

Just FYI, TYPE_PRECISION for vectors is a log2 of the number of elements, see
TYPE_VECTOR_SUBPARTS. Which is why you get 0 here since we have 1 element.