[Bug c++/59739] missed optimization: attribute ((pure)) could be honored more often

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59739

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-03-19
                 CC|                            |rguenther at suse dot de
     Ever confirmed|0                           |1

--- Comment #3 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Confirmed. Actually I think this is more for Richard. The issues here is, I
blieve, the fact that non-gimple-register return values are consiered to be
stores that invalidate the memory context.
It is FRE1 that does the optimization.