[Bug rtl-optimization/29144] Missing if-conversion. If-conversion dependent on operand order. Inconsistent if-conversion.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29144

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |64700
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=64700

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
a, c is really just another case of PR 64700.

b and d are already optimized on the gimple level by PRE to:
```
  _10 = a_4(D) - b_5(D);
  if (c_3(D) != 0)
    goto <bb 4>; [50.00%]
  else
    goto <bb 3>; [50.00%]

  <bb 3> [local count: 536870913]:
  r_7 = o_6(D) + _10;

  <bb 4> [local count: 1073741824]:
  # r_2 = PHI <_10(2), r_7(3)>
```


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64700
[Bug 64700] Sink common code through PHI