https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100925
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2021-06-05
CC| |pinskia at gcc dot gnu.org
Status|UNCONFIRMED |NEW
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It was exposed by r12-1152.
Phi-opt produces this now:
_9 = _3 != 0B;
_10 = (<<< Unknown tree: offset_type >>>) _9;
_11 = -_10;
/// The above is new
_6 = _3 != 0B;
_7 = _11 != -1;
_8 = _6 & _7;
----- CUT ----
before reassoc we have:
_9 = _3 != 0B;
_10 = (<<< Unknown tree: offset_type >>>) _9;
_11 = -_10;
_7 = _11 != -1;
_8 = _7 & _9;
---- CUT ---
But _9 and _7 will always have the same value even.
