[Bug tree-optimization/63864] Missed late memory CSE

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63864

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2014-11-14
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
            Summary|Missed optimization,        |Missed late memory CSE
                   |related to SRA(??)          |
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed - mine.  Note that SRA cannot decompose arrays but I see a lot
of missed CSE opportunities here which is because we unroll the loops
completely only very late and the only memory CSE pass after that is
DOM which is somewhat very limited here...

I'll try to improve that.  Related to some other PR.