[Bug tree-optimization/105532] 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]

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

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm, so prec is 0 here.
      gcc_checking_assert (prec < HOST_BITS_PER_WIDE_INT);
      int shift = HOST_BITS_PER_WIDE_INT - prec;
      return ((HOST_WIDE_INT) ((unsigned HOST_WIDE_INT) src << shift)) >>
shift;


That is the only way to get a shift of 64.