[Bug target/100998] [12 Regression] bug in experimental GCC12 with optimization '-O1', disappears with optimization '-O0'

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100998

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Peter Bergner from comment #7)
> (In reply to Peter Bergner from comment #6)
> > And you guessed well!  I built a mainline compiler for Gordon with Aaron's
> > commit reverted and the issue goes away.  Assigning this to Aaron to debug.
> 
> Talking with Aaron offline, he pointed me at his
> 52e130652a76ff3d14c0f572fcd79fa53637ce2c fix which is already upstream. 
> Checking my sources, I don't have that, so I will retry with an updated
> compiler.

Yes that looks like it could be in this case, since we are getting 0 - 2 rather
2 - 0

That is for:
  _3 = _2 & _9;
  _4 = _3 - _1;
before that patch, it would be doing basically _1 - _3 instead of the above.