[Bug tree-optimization/83389] std::tie generates sub-optimal code when used to compare POD fields

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83389

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC 15 disabled the "optimization" for the non tie case.
  _5 = d1_11(D)->c1;
  _6 = d2_12(D)->c1;
  if (_5 == _6)
    goto <bb 5>; [34.00%]
  else
    goto <bb 6>; [66.00%]

  <bb 5> [local count: 42202350]:
  _7 = d1_11(D)->c2;
  _8 = d2_12(D)->c2;
  _13 = _7 == _8;