[Bug tree-optimization/78354] range information lost after unsigned conversion

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78354

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Actually, what I suggested isn't possible because unsigned wraparound
effectively resets the lower bound.  In the example in comment #0, if the value
of x were 65536, for instance, y's value would be 0 and the y < 123 condition
would hold, and so retaining the lower bound wouldn't make sense.