[Bug tree-optimization/71836] Missing constant prop from const variable

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71836

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-07-12
                 CC|                            |rguenth at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  The loop is only unrolled late and only FRE knows how to lookup
from *.LC0.  DOM only applies CSE to literally equivalent stores (that's
a quite hard limit which also makes it quite more efficient than FRE).

Not sure if more FRE passes are really desirable.