[Bug middle-end/82885] memcpy does not propagate aliasing knowledge

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82885

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |alias, missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-11-08
                 CC|                            |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's also difficult because there's no representation for "[ch1, ch1 +
1024*1024[ and [ch2, ch2 + 1024+1024[" do not overlap.