[Bug c/15850] extra load with volatilable variables

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |2.95.3 3.2.3 3.3.3 3.4.0
                   |                            |3.5.0 3.0.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15850