[Bug rtl-optimization/49807] Missed byte (subreg) extraction when storing to volatile mem

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49807

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|avr                         |avr, mips*-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011.07.23 22:15:10
   Target Milestone|4.7.0                       |---
     Ever Confirmed|0                           |1

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-07-23 22:15:10 UTC ---
I saw this on MIPS too.(In reply to comment #5)
> Do you have an idea how to attack this optimization flaw?
To figure out the places which reduce the MEM's sizes and conditionalize them
on non volatile MEM's.
And then remove the condition in combine for not allowing volatile memory
optimizations.