[Bug tree-optimization/102684] [missed optimization] std::min_element / ranges::min_element does not get optimized away with std::gcd

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102684

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is what optimized looks like on the trunk (after the main->f change):
  <bb 2> [local count: 1073741824]:
  _54 = operator new (16);
  MEM <uint128_t> [(char * {ref-all})_54] = 0xa000000060000000400000002;

  <bb 3> [local count: 3043903040]:
  # __m_103 = PHI <1(2), __m_85(6)>
  # __n_104 = PHI <5(2), __n_111(6)>
  if (__m_103 > __n_104)
    goto <bb 7>; [50.00%]
  else
    goto <bb 4>; [50.00%]

  <bb 4> [local count: 1521951520]:
  __n_107 = __n_104 - __m_103;
  if (__n_107 == 0)
    goto <bb 5>; [22.00%]
  else
    goto <bb 6>; [78.00%]

  <bb 5> [local count: 1014634349]:
  _109 = __m_103 << 1;
  _41 = (int) _109;
  operator delete (_54, 16);
  return _41;

  <bb 6> [local count: 2709073704]:
  # __m_85 = PHI <__m_103(4), __n_104(7)>
  # __n_30 = PHI <__n_107(4), __n_87(7)>
  _110 = __builtin_ctz (__n_30);
  __n_111 = __n_30 >> _110;
  goto <bb 3>; [100.00%]

  <bb 7> [local count: 1521951520]:
  __n_87 = __m_103 - __n_104;
  goto <bb 6>; [100.00%]

There seems to be some VRP missing inside the loop.