[Bug rtl-optimization/111143] [missed optimization] unlikely code slows down diffutils x86-64 ASCII processing

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111143

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  _22 = *iter_57;
  if (_22 >= 0)
    goto <bb 4>; [90.00%]
  else
    goto <bb 5>; [10.00%]

  <bb 4> [local count: 860067200]:
  _76 = (long long unsigned int) _22;
  _15 = sum_31 + _76;
  goto <bb 7>; [100.00%]
...
  <bb 7> [local count: 955630226]:
  # prephitmp_42 = PHI <1(4), 1(5), len_29(6)>
  # prephitmp_35 = PHI <_15(4), sum_31(5), _34(6)>
  mbs ={v} {CLOBBER(eol)};
  ch ={v} {CLOBBER(eol)};
  iter_21 = iter_57 + prephitmp_42;