[Bug tree-optimization/95425] Failure to optimize bit twiddling on statics that does nothing

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95425

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-06-02
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, there's a duplicate - the issue is GCC doesn't get that if only
'f' modifies x it can constant propagate the zero initializer.  Of course
it's a little tricky to do in VN since you have to iterate where there's no
visible backedge (and obviously you don't want to do that in general).