[Bug tree-optimization/113234] missing folding to builtin_isunordered if manual nan comparison is used

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113234

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|rtl-optimization            |tree-optimization
   Last reconfirmed|                            |2024-01-04
           Keywords|                            |missed-optimization
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Even with -fno-trapping-math, we don't combine:

  _1 = i_3(D) != i_3(D);
  _2 = j_4(D) != j_4(D);
  _5 = _1 | _2;

into:

  _5 = i_2(D) unord j_3(D);


Confirmed.